WO2018139009A1 - Capteur tactile et dispositif d'affichage avec capteur tactile intégré - Google Patents

Capteur tactile et dispositif d'affichage avec capteur tactile intégré Download PDF

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Publication number
WO2018139009A1
WO2018139009A1 PCT/JP2017/040565 JP2017040565W WO2018139009A1 WO 2018139009 A1 WO2018139009 A1 WO 2018139009A1 JP 2017040565 W JP2017040565 W JP 2017040565W WO 2018139009 A1 WO2018139009 A1 WO 2018139009A1
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WIPO (PCT)
Prior art keywords
electrode
connection line
touch sensor
electrodes
sensor according
Prior art date
Application number
PCT/JP2017/040565
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English (en)
Japanese (ja)
Inventor
佐々木　亨
秋元　肇
Original Assignee
株式会社ジャパンディスプレイ
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Publication of WO2018139009A1 publication Critical patent/WO2018139009A1/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
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • 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
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces

Definitions

  • the present invention relates to a touch sensor and a display device with a built-in touch sensor.
  • Patent Document 1 a first electrode extending in the X direction in which adjacent main body portions are connected via a connecting portion, and a second electrode extending in the Y direction in which adjacent main body portions are connected via a connecting portion.
  • a display device incorporating a capacitive touch sensor arranged with a sealing film interposed therebetween.
  • the inventors of the present application are considering forming two types of electrodes of the capacitive touch sensor in the same layer.
  • one of the first connection line that connects the adjacent first electrodes and the second connection line that connects the adjacent second electrodes is formed in another layer separated from the electrode layer by an insulating film.
  • a large number of shapes having the same orientation are arranged, so that there is a possibility that the intersecting portion is easily visually recognized.
  • An object of the present invention is to provide a touch sensor and a display device with a built-in touch sensor in which an intersection is difficult to visually recognize.
  • the touch sensor of the present invention is a plurality of first electrodes arranged two-dimensionally, and the first electrodes adjacent in the first direction are the same layer or different layers from the first electrodes.
  • the first electrodes adjacent to each other in the second direction crossing the first direction are not connected, and are two-dimensionally in the same layer as the first electrode.
  • the plurality of second electrodes arranged and each surrounded by the first electrode, wherein the second electrodes adjacent in the second direction intersect the first connection line in plan view And a plurality of second electrodes, which are connected to the second electrode via a second connection line of the same layer or different layer, and are not connected to the second electrode adjacent in the first direction, and the first connection line and the An insulating film interposed between the first connecting line and the second connecting line, and the first layer and the second electrode in the same layer as the first connecting line.
  • the display device with a built-in touch sensor according to the present invention includes a display unit and the touch sensor according to the present invention formed on the display unit.
  • FIG. 5 is a cross-sectional view taken along line II-II shown in FIGS. 1 and 4.
  • FIG. 5 is a cross-sectional view taken along line III-III shown in FIGS. 1 and 4.
  • 1 is a plan view of a touch sensor according to a first embodiment of the present invention. It is a top view of the touch sensor which concerns on 2nd Embodiment of this invention. It is a top view of the touch sensor which concerns on 3rd Embodiment of this invention. It is a top view which shows the structural example of a connection line. It is a top view which shows the example of a connection of an electrode and a different layer connection line.
  • FIG. 8B is a sectional view taken along line 8B-8B shown in FIG. 8A.
  • FIG. 8B is a sectional view taken along line 8C-8C shown in FIG. 8A.
  • FIG. 9B is a sectional view taken along line 9B-9B shown in FIG. 9A.
  • FIG. 9B is a sectional view taken along line 9C-9C shown in FIG. 9A.
  • FIG. 18A It is a figure following FIG. 18B. It is a figure following FIG. 18C. It is a figure following FIG. 18D. It is a figure following FIG. 18E.
  • FIG. 1 is a plan view of a display device with a built-in touch sensor (hereinafter also simply referred to as a display device) according to an embodiment.
  • An organic EL display device is given as an example of the display device.
  • the display device 1 is configured to display a full-color image by forming a full-color pixel by combining a plurality of color unit pixels (sub-pixels) composed of, for example, red, green, and blue.
  • the display device 1 includes a display panel 10 and a touch sensor 20 formed on the display area of the display panel 10.
  • a peripheral region (frame region) 11 is formed outside the display region of the display panel 10, and an FPC 13 for electrical connection with the outside is connected to the peripheral region 11.
  • the direction along the peripheral region 11 to which the FPC 13 is connected is defined as the X direction
  • the direction orthogonal thereto is defined as the Y direction.
  • FIG. 2 is a cross-sectional view taken along the line II-II shown in FIG. 1 and FIG.
  • FIG. 3 is a cross-sectional view taken along the line III-III shown in FIGS.
  • hatching of some layers such as the substrate 30, the planarizing film 51, and the interlayer insulating film 53 is omitted in order to make the cross-sectional structure easy to see.
  • the stacking direction is the upward direction.
  • the substrate 30 is made of a flexible resin such as glass or polyimide.
  • the upper surface of the substrate 30 is covered with an undercoat layer 31.
  • a semiconductor layer 41 is formed on the undercoat layer 31, and the semiconductor layer 41 is covered with a gate insulating film 33.
  • a gate electrode 43 is formed on the gate insulating film 33, and the gate electrode 43 is covered with a passivation film 35.
  • the drain electrode 45 and the source electrode 47 are connected to the semiconductor layer 41 through the gate insulating film 33 and the passivation film 35.
  • the semiconductor layer 41, the gate electrode 43, the drain electrode 45, and the source electrode 47 constitute a thin film transistor 40.
  • the thin film transistor 40 is provided so as to correspond to each of the plurality of unit pixels.
  • the undercoat layer 31, the gate insulating film 33, and the passivation film 35 are made of an inorganic insulating material such as SiO 2 or SiN.
  • a lead wiring 49 is formed in the peripheral region 11.
  • the lead wiring 49 is a wiring for electrically connecting the touch sensor 20 and the FPC 13.
  • the drain electrode 45, the source electrode 47, and the lead wiring 49 are covered with a planarizing film 51, and the planarizing film 51 is covered with an interlayer insulating film 53.
  • the drain electrode 45, the source electrode 47, and the lead-out wiring 49 are made of a conductive material including, for example, Al, Ag, Cu, Ni, Ti, Mo, or the like.
  • the planarizing film 51 is formed of an organic insulating material such as acrylic resin and has a flat upper surface.
  • the interlayer insulating film 53 is formed of an inorganic insulating material such as SiO 2 or SiN.
  • a pixel electrode 61 (for example, an anode) is formed on the interlayer insulating film 53.
  • the pixel electrode 61 passes through the planarization film 51 and the interlayer insulating film 53 and is connected to the source electrode 47.
  • the pixel electrode 61 is provided so as to correspond to each of the plurality of unit pixels.
  • the pixel electrode 61 is formed as a reflective electrode.
  • terminals 67 and 68 are formed in the peripheral region 11 and are connected to both ends of the lead-out wiring 49 through the planarizing film 51 and the interlayer insulating film 53.
  • the pixel electrode 61 and the terminals 67 and 68 are formed to include a conductive material including, for example, Al, Ag, Cu, Ni, Ti, Mo, or the like, or a conductive oxide such as ITO or IZO.
  • the pixel electrode 61 is covered with a pixel separation film 55.
  • the pixel isolation film 55 is also called a rib or a bank.
  • the pixel separation film 55 is formed with an opening 55a through which the pixel electrode 61 is exposed to the bottom.
  • the inner edge portion of the pixel separation film 55 that forms the opening 55a is placed on the peripheral edge portion of the pixel electrode 61, and has a tapered shape that spreads outward as it goes upward. Note that the pixel isolation film 55 is not formed in the peripheral region 11.
  • the pixel separation film 55 is formed of an organic material such as acrylic resin or polyimide resin.
  • the light emitting layers 63 are formed separately from each other.
  • the light emitting layer 63 emits light in a plurality of colors including, for example, red, green, and blue corresponding to each of the plurality of unit pixels.
  • at least one layer of a hole transport layer, a hole injection layer, an electron transport layer, and an electron injection layer may be formed.
  • the light emitting layer 63 is formed by vapor deposition using a mask.
  • the light emitting layer 63 may be formed by vapor deposition as a uniform film (so-called solid film) extending over the entire display region across a plurality of unit pixels.
  • the light emitting layer 63 emits white light and is emitted by a color filter.
  • a color filter For example, each component of a plurality of colors including red, green, and blue is extracted.
  • the light emitting layer 63 is not limited to vapor deposition, and may be formed by coating.
  • the light emitting layer 63 and the pixel separation film 55 are covered with a counter electrode 65 (for example, a cathode).
  • the counter electrode 65 is formed as a uniform film (so-called solid film) that extends over the entire display region across a plurality of unit pixels.
  • a light emitting element 60 is configured by the light emitting layer 63 and the pixel electrode 61 and the counter electrode 65 sandwiching the light emitting layer 63, and the light emitting layer 63 emits light by a current flowing between the pixel electrode 61 and the counter electrode 65.
  • the counter electrode 65 is formed of a transparent conductive material such as ITO or a metal thin film such as MgAg.
  • the pixel separation film 55 and the counter electrode 65 are sealed by being covered with a sealing film (passivation film) 70 and shielded from moisture.
  • the sealing film 70 has, for example, a three-layer structure including an inorganic film 71, an organic film 73, and an inorganic film 75 in this order from the bottom.
  • the inorganic films 71 and 75 are made of an inorganic insulating material such as SiO 2 or SiN.
  • the organic film 73 is made of an organic insulating material such as an acrylic resin, and planarizes the upper surface of the sealing film 70. Note that the sealing film 70 may not be formed in the peripheral region 11. In particular, the sealing film 70 is not formed on the terminals 67 and 68.
  • the display device 1 has the touch sensor 20 on the sealing film 70.
  • a base insulating film 81 is formed on the sealing film 70.
  • the base insulating film 81 is made of, for example, an organic insulating material such as acrylic resin, and the upper surface of the base insulating film 81 is planarized.
  • On the base insulating film 81 a plurality of first electrodes 21 and a plurality of second electrodes 22 arranged in a two-dimensional manner are formed.
  • the first electrode 21 and the second electrode 22 constitute a drive electrode and a detection electrode of a capacitive touch sensor. Details of the touch sensor 20 will be described later.
  • the first electrode 21 and the second electrode 22 are covered with an interlayer insulating film 83.
  • the interlayer insulating film 83 is formed of, for example, an inorganic insulating material such as SiO 2 or SiN or an organic insulating material such as acrylic resin.
  • the lead-out wiring 25 is formed on the peripheral edge of the interlayer insulating film 83.
  • the lead-out wiring 25 is connected to the first electrode 21 or the second electrode 22 through an opening (through hole) 83 a formed in the interlayer insulating film 83.
  • the lead wiring 25 extends from the interlayer insulating film 83 to the peripheral region 11 beyond the edges of the interlayer insulating film 83, the base insulating film 81, and the sealing film 70.
  • the lead wiring 25 is connected to a terminal 67 close to the touch sensor 20 among the two terminals 67 and 68 connected to the lead wiring 49 embedded in the peripheral region 11.
  • the FPC 13 is connected to a terminal 68 away from the touch sensor 20 via an anisotropic conductive member 139.
  • FIG. 4 is a plan view of the touch sensor according to the first embodiment.
  • the touch sensor 20 according to the present embodiment includes a plurality of first electrodes 21 and a plurality of second electrodes 22 that are two-dimensionally arranged in a layer between the base insulating film 81 and the interlayer insulating film 83. Yes.
  • Each of the first electrode 21 and the second electrode 22 has a rectangular shape in which an X direction (first direction) and a Y direction (second direction) intersecting (for example, orthogonal to) the diagonal direction are diagonal, so-called rhombus ( Diamond shape). Further, each of the first electrode 21 and the second electrode 22 is formed by a mesh-like wiring (mesh wiring) made of a conductive material such as metal.
  • the first electrode 21 and the second electrode 22 are formed of a conductive material containing, for example, Al, Ag, Cu, Ni, Ti, Mo, or the like. Without being limited thereto, the first electrode 21 and the second electrode 22 may be formed of a transparent conductive film.
  • the plurality of first electrodes 21 are two-dimensionally arranged side by side in the X direction and the Y direction, respectively. Among these first electrodes 21, the first electrodes 21 adjacent in the X direction are connected via the first connection line 23, and the first electrodes 21 adjacent in the Y direction are not connected. That is, each of the plurality of first electrodes 21 forms a plurality of electrode rows extending in the X direction by connecting the first electrodes 21 adjacent to each other in the X direction via the first connection line 23. The electrode rows are electrically separated in the Y direction.
  • the plurality of second electrodes 22 are also two-dimensionally arranged in the X direction and the Y direction. Among these second electrodes 22, the second electrode 22 adjacent in the Y direction is connected via the second connection line 24 intersecting the first connection line 23 in plan view, and the second electrode 22 adjacent in the X direction. The electrode 22 is not connected. That is, the plurality of second electrodes 22 form a plurality of electrode rows extending in the Y direction by connecting the second electrodes 22 adjacent to each other in the Y direction via the second connection line 24. The columns are electrically separated in the X direction.
  • Each second electrode 22 is disposed so as to be surrounded by the first electrode 21.
  • each of the second electrodes 22 is disposed between the first electrodes 21 adjacent to each other in a direction intersecting both the X direction and the Y direction (for example, a direction of 45 degrees or ⁇ 45 degrees).
  • the first electrode 21 and the second electrode 22 are electrically separated by being spaced apart from each other so as not to contact each other. Since the first electrode 21 and the second electrode 22 are arranged in the same layer, a difference in light reflection or the like hardly occurs, so that the first electrode 21 and the second electrode 22 are hardly visually recognized.
  • the first connection line 23 and the second connection line 24 intersect in plan view.
  • An interlayer insulating film 83 is interposed between the first connection line 23 and the second connection line 24 that intersect in plan view, and the two are electrically separated.
  • a portion where the first connection line 23 and the second electrode 22 intersect in plan view is referred to as an “intersection 29”.
  • each first connection line 23 includes a first connection line in the same layer as the first electrode 21 and the second electrode 22 (hereinafter referred to as the same layer first connection line 231), the first electrode 21, It is formed by either the second electrode 22 or a first connection line of a different layer (hereinafter referred to as a different layer first connection line 235).
  • the same layer first connection line 231 is formed continuously with the first electrode 21 under the interlayer insulating film 83.
  • the different layer first connection line 235 is a so-called bridge wiring formed on the interlayer insulating film 83 and connected to the first electrode 21 through a through hole 83 a formed in the interlayer insulating film 83.
  • each of the second connection lines 24 includes a second connection line in the same layer as the first electrode 21 and the second electrode 22 (hereinafter referred to as the same layer second connection line 241), and the first electrode 21 and the second electrode 22. It is formed by either the electrode 22 or a second connection line of a different layer (hereinafter referred to as a different layer second connection line 245).
  • the same layer second connection line 241 is formed continuously with the second electrode 22 under the interlayer insulating film 83.
  • the different layer second connection line 245 is a so-called bridge wiring formed on the interlayer insulating film 83 and connected to the second electrode 22 through a through hole 83 a formed in the interlayer insulating film 83.
  • each of the intersecting portions 29 includes a “first intersecting portion 291” where the same-layer first connection line 231 and the different-layer second connection line 245 intersect, and a different-layer first connection line 235 and the same-layer second connection line 245. It is formed by any one of the “second intersecting portions 292” intersecting with the connection line 241.
  • the interlayer insulating film 83 is formed over the entire display region, but the present invention is not limited to this, and the interlayer insulating film 83 may be distributed at each intersection 29. That is, the interlayer insulating film 83 is interposed between the same-layer first connection line 231 and the different-layer second connection line 245 at the first intersection 291, and the different-layer first connection line 235 at the second intersection 292 and The first electrode 21 and the second electrode 22 may not be covered as long as they are interposed between the second connection lines 241 in the same layer.
  • the first intersection 291 and the second intersection 292 are arranged adjacent to each other.
  • the 1st crossing part 291 and the 2nd crossing part 292 do not need to be adjacent in all, and the place where the 1st crossing part 291 adjoins may be included, and the 2nd crossing part 292 Adjacent locations may be included.
  • At least one of the plurality of intersections 29 closest to the first intersection 291 is defined as the second intersection 292.
  • at least one of the plurality of intersections 29 closest to the second intersection 292 is defined as the first intersection 291.
  • the first intersection 291 and the second intersection 292 are alternately arranged in the X direction and the Y direction, and are arranged in a so-called checkered pattern.
  • the first intersection 291 and the second intersection 292 are not limited to every other one, and may be arranged every two or more.
  • the 1st crossing part 291 and the 2nd crossing part 292 should just appear periodically.
  • first intersection 291 and the second intersection 292 have the same number per fixed area.
  • the fixed area may be the entire display area, or may be a part of the center of the display area, for example. If the number per fixed area is the same, the first intersection 291 and the second intersection 292 may be randomly arranged.
  • FIG. 5 is a plan view of the touch sensor according to the second embodiment.
  • the first intersecting portions 291 and the second intersecting portions 292 are alternately arranged only in the X direction and are not arranged alternately in the Y direction, and the same ones are arranged. That is, two of the four intersections 29 closest to the first intersection 291 are adjacent to each other in the X direction as the second intersection 292. The same applies to the second intersection 292. Even in the second embodiment, even if not as much as in the first embodiment, there is an effect that the crossing portion 29 is less likely to be visually recognized.
  • FIG. 6 is a plan view of the touch sensor according to the third embodiment.
  • the first intersecting portions 291 and the second intersecting portions 292 are alternately arranged only in the Y direction, and are not arranged alternately in the X direction. That is, two of the four intersections 29 closest to the first intersection 291 are adjacent to each other in the Y direction as the second intersection 292. The same applies to the second intersection 292. Even in the third embodiment, the effect of making the crossing portion 29 less likely to be visually recognized is obtained, although not as much as in the first embodiment.
  • each electrode row of the second electrode 22 that is a detection electrode is the same layer second connection line 241 in the second embodiment.
  • both the same-layer second connection lines 241 and the different-layer second connection lines 245 are alternately included. For this reason, it is preferable to employ the third embodiment from the viewpoint of aligning the electric resistances of the electrode arrays of the second electrodes 22 that are detection electrodes.
  • FIG. 7 is a plan view showing a configuration example of connection lines.
  • the second intersection 292 is shown in an enlarged manner, but the first intersection 291 is similarly configured.
  • the different layer first connection line 235 and the same layer second connection line 241 are formed of a plurality of metal wires.
  • the different layer first connection line 235 includes two metal lines formed on the interlayer insulating film 83, and ends of the two metal lines are connected to the first electrode through the through holes 83a. 21 is connected to the end of the X direction.
  • Each end portion of the plurality of metal wires forming the different layer first connection line 235 may have an enlarged portion that extends in a pad shape so as to include the through hole 83a. In this case, it is desirable that the enlarged portion has a size that does not hinder the display of the pixel 100 (see FIG. 12). Further, the interval between the two metal lines forming the different layer first connection line 235 or the same layer second connection line 241 is the end of the first electrode 21 or the second electrode 22 formed as a mesh wiring (for example, It is desirable that the width is the same as the width of one eye constituting the end portion.
  • connection portion between the first electrode 21 and the different layer first connection line 235 is shown in an enlarged manner, but the connection portion between the second electrode 22 and the different layer second connection line 245 is similarly shown. Composed. The first electrode 21 is exposed at the bottom of the through hole 83a formed in the interlayer insulating film 83, and the different-layer first connection line 235 formed on the interlayer insulating film 83 is connected to the first electrode 21 through the through hole 83a. It is connected.
  • the line width of the different-layer first connection line 235 may be the same as the line width of the first electrode 21 formed as a mesh-like wiring. Further, the width of the through hole 83a may be smaller than the line width of the first electrode 21. In this case, the first electrode 21 is exposed at the entire bottom of the through hole 83a, and a different layer is formed at the entire bottom of the through hole 83a. A first connection line 235 is formed.
  • the line width of the different layer first connection line 235 may be larger than the line width of the first electrode 21.
  • the line width of the different-layer first connection line 235 is desirably a size that does not hinder the display of the pixel 100 (see FIG. 12).
  • the width of the through hole 83a may be larger than the line width of the first electrode 21 or the different layer first connection line 235.
  • the first electrode 21 is exposed at a part of the bottom of the through hole 83a
  • a different layer first connection line 235 is formed at a part of the bottom of the through hole 83a. This example is useful when the line width of the first electrode 21 is small and it is difficult to fit the through hole 83a inside the first electrode 21 in plan view.
  • FIG. 10 is a plan view showing a configuration example of connection lines.
  • the second intersection 292 is shown in an enlarged manner, but the first intersection 291 is similarly configured.
  • the different layer first connection line 235 is formed of a transparent conductive film
  • the same layer second connection line 241 is formed of a plurality of metal lines.
  • the different-layer first connection line 235 is made of a transparent conductive film such as ITO formed on the interlayer insulating film 83, and an end portion of the transparent conductive film in the X direction passes through a plurality of through holes 83a.
  • the first electrode 21 is connected to the end portion in the X direction.
  • the width of the transparent conductive film forming the different layer first connection line 235 is desirably wider than the line width of the first electrode 21 formed as a mesh-like wiring. Since the transparent conductive film is transparent, it may be formed so as to overlap with the pixel 100 (see FIG. 12) in plan view. This is effective when the length (X direction) of the transparent conductive film forming the different layer first connection line 235 is 1.5 times longer than the width (Y direction). From the viewpoint of reducing the electrical resistance, the length (X direction) of the transparent conductive film may be 1.5 times or more longer than the width (Y direction).
  • FIG. 11 is a plan view of the touch sensor according to the fourth embodiment.
  • the first electrode 21 and the second electrode 22 are disposed on the interlayer insulating film 83.
  • the different layer first connection line 235 and the different layer second connection line 245 are arranged under the interlayer insulating film 83.
  • the first electrode 21 and the second electrode 22 formed on the interlayer insulating film 83 include a different layer first connection line 235 and a different layer second connection line 245 formed under the interlayer insulating film 83 through the through hole 83a. Are connected to each.
  • FIG. 12 is a plan view showing an arrangement example of electrodes and pixels.
  • FIG. 13 is a plan view showing another arrangement example.
  • the display panel 10 includes a plurality of unit pixels 10R, 10G, and 10B made of red, green, and blue, for example, and a set of the unit pixels 10R, 10G, and 10B of a plurality of colors constitutes the pixel 100.
  • FIG. 12 shows an example of a so-called stripe arrangement in which unit pixels 10R, 10G, and 10B extending in the Y direction are arranged in the X direction.
  • FIG. 13 shows that the blue unit pixel 10B is replaced with the red and green unit pixels 10R, 10G. It shows an example that is larger.
  • Each of the unit pixels 10R, 10G, and 10B is partitioned by an opening 55a of the pixel separation film 55 that exposes the pixel electrode 61 (see FIG. 2).
  • each line of the mesh wiring constituting the first electrode 21 or the second electrode 22 is disposed above the pixel isolation film 55. That is, each line of the mesh wiring overlaps with the pixel separation film 55 in a plan view, and does not overlap with the opening 55a forming the unit pixels 10R, 10G, and 10B.
  • the width of each line of the mesh-like wiring is narrower than the interval between the openings 55a adjacent to each other in the X direction or the Y direction.
  • Each of the openings of the mesh wiring (that is, the mesh) includes one or a plurality of pixels 100 in plan view. That is, the mesh pitch of the mesh wiring is an integral multiple of the arrangement pitch of the unit pixels 10R, 10G, and 10B.
  • each line of the mesh-like wiring constituting the first electrode 21 or the second electrode 22 is arranged above the pixel isolation film 55, so that light traveling upward from the unit pixels 10R, 10G, and 10B is mesh-like. Not disturbed by wiring. Note that not only the first electrode 21 or the second electrode 22 but also the first connection line 23 or the second connection line 24 are similarly disposed above the pixel isolation film 55.
  • FIG. 14 is a plan view showing another arrangement example of electrodes and pixels.
  • the unit pixels 10R, 10G, and 10B are formed in a rectangular shape in which the X direction and the Y direction are diagonal directions, a so-called rhombus shape (diamond shape).
  • the unit pixels 10R, 10G, and 10B have the X direction and the Y direction as diagonal directions, that is, in a third or fourth direction (for example, a direction of 45 degrees or ⁇ 45 degrees) that intersects both the X direction and the Y direction. They are arranged two-dimensionally side by side.
  • a so-called pen tile arrangement in which a group of one red unit pixel 10R, one blue unit pixel 10B, and two green unit pixels 10G constitutes the pixel 100 is employed.
  • FIG. 14 shows the second electrode 22 in an enlarged manner, but the first electrode 21 is similarly configured.
  • Each line of the mesh-like wiring constituting the first electrode 21 or the second electrode 22 is disposed above the pixel isolation film 55, and is similar to the arrangement direction of the unit pixels 10R, 10G, and 10B in the X direction and the Y direction. It extends in a third or fourth direction intersecting both (for example, a direction of 45 degrees or -45 degrees).
  • the width of each line of the mesh-like wiring is narrower than the interval between the openings 55a adjacent in the third direction or the fourth direction.
  • Each of the openings of the mesh wiring includes one or a plurality of pixels 100 in plan view.
  • FIG. 15 is a plan view of the touch sensor according to the fifth embodiment.
  • the fifth embodiment is applied to the pixel array shown in FIG. Similar to the lines of the mesh wiring constituting the first electrode 21 or the second electrode 22, the first connection line 23 and the second connection line 24 are the third or fourth that intersects both the X direction and the Y direction. Each extends in a direction (eg, 45 degrees or -45 degrees). By being configured in this way, the light traveling upward from the pixel is not obstructed by the first connection line 23 and the second connection line 24.
  • first connection line 23 or the second connection line 24 has a central portion extending in one of the third and fourth directions, and end portions on both sides thereof extending in the other of the third and fourth directions. It is bent like a bowl. Further, the first connection line 23 and the second connection line 24 are configured such that the central portions are orthogonal to each other and overlap one another when one is rotated 90 degrees.
  • first intersection 291 and the second intersection 292 are alternately arranged in each of the X direction and the Y direction. That is, all of the four intersections 29 closest to the first intersection 291 are the second intersections 292. The same applies to the second intersection 292. According to this, also in the pixel array shown in FIG. 14, the effect that the intersection 29 is hardly visually recognized can be obtained as in the above embodiment.
  • FIG. 16 is a plan view of a touch sensor according to the sixth embodiment.
  • the sixth embodiment is applied to the pixel array shown in FIG. Similar to the lines of the mesh wiring constituting the first electrode 21 or the second electrode 22, the first connection line 23 and the second connection line 24 are the third or fourth that intersects both the X direction and the Y direction. Each extends in a direction (eg, 45 degrees or -45 degrees). By being configured in this way, the light traveling upward from the pixel is not obstructed by the first connection line 23 and the second connection line 24.
  • the first electrodes 21 adjacent to each other in the X direction are arranged offset in the Y direction, and the first connection line 23 extends linearly as a whole in the third or fourth direction.
  • the first electrodes 21 adjacent in the direction are connected.
  • the second electrodes 22 adjacent to each other in the Y direction are arranged so as to be offset in the X direction, and the second connection line 24 extends linearly in the third or fourth direction so that it is adjacent to the Y direction.
  • a matching second electrode 22 is connected.
  • first intersection 291 and the second intersection 292 are alternately arranged in each of the X direction and the Y direction. That is, all of the four intersections 29 closest to the first intersection 291 are the second intersections 292. The same applies to the second intersection 292. According to this, also in the pixel array shown in FIG. 14, the effect that the intersection 29 is hardly visually recognized can be obtained as in the above embodiment.
  • FIG. 17 is a plan view of the touch sensor according to the seventh embodiment.
  • a dummy wiring 27 (third electrode) that is not connected to any of the first electrode 21 and the second electrode 22 is formed between the first electrode 21 and the second electrode 22.
  • the dummy wiring 27 is disposed in the same layer as the first electrode 21 and the second electrode 22 so as to be sandwiched between the first electrode 21 and the second electrode 22. According to this, since the coupling between the first electrode 21 and the second electrode 22 can be reduced, the change in capacitance when touched is increased, and the detection sensitivity can be improved.
  • the dummy wiring 27 is also disposed above the pixel isolation film 55 and travels upward from the unit pixels 10R, 10G, and 10B in the same manner as each line of the mesh wiring configuring the first electrode 21 or the second electrode 22. It is desirable not to inhibit.
  • FIG. 18A to FIG. 18F are diagrams showing an example of the manufacturing process of the display device with a built-in touch sensor.
  • FIG. 18A shows a state where the light emitting element 60 is completed.
  • the pixel isolation film 55 is not formed in the peripheral region 11.
  • the range of the pixel isolation film 55 is referred to as a “display region”.
  • the interlayer insulating film 53 and the terminals 67 and 68 are exposed.
  • the lead-out wiring 49 and the terminals 67 and 68 connected to the touch sensor 20 are shown. Connected to.
  • FIG. 18B shows a process of forming the sealing film 70.
  • the organic film 73 formed of an organic material may be formed so as to cover the display region, and may not be formed in the peripheral region 11.
  • the outer edge of the organic film 72 is located on the inner side of the outer edge of the pixel separation film 55, and is sealed when two layers of inorganic films 71 and 73 formed of an inorganic material are in close contact with each other. For this reason, the peripheral region 11 is covered with two layers of inorganic films 71 and 73.
  • the two layers of inorganic films 71 and 73 covering the peripheral region 11 are referred to as “peripheral portions 76”.
  • FIG. 18C shows a step of forming the base insulating film 81.
  • the base insulating film 81 is formed only in the display region and not in the peripheral region 11. Specifically, the outer edge of the base insulating film 81 is located inside the outer edge of the pixel separation film 55 and located outside the outer edge of the organic film 72 of the sealing film 70.
  • the base insulating film 81 is made of an organic insulating material, and is used to planarize the upper surface of the base insulating film 81 and to remove the peripheral portion 76 in the next process.
  • FIG. 18D shows a process of removing the peripheral portion 76.
  • the removal of the peripheral portion 76 is performed using the base insulating film 81 as a mask.
  • the two inorganic films 71 and 75 are cut at the outer edge of the base insulating film 81, that is, at a position inside the outer edge of the pixel isolation film 55 and outside the outer edge of the organic film 73.
  • the interlayer insulating film 53 below the peripheral portion 76 is also formed of the same inorganic insulating material as the inorganic films 71 and 75, a part or all of the interlayer insulating film 53 is simultaneously removed by removing the peripheral portion 76. There is.
  • FIG. 18E shows a process of forming the touch sensor 20. Specifically, the first electrode 21, the second electrode 22, the same layer first connection line 231 and the same layer second connection line 241 are formed on the base insulating film 81, and the interlayer insulating film 83 and the opening 83a are formed thereon. Then, the different-layer first connection line 235 and the different-layer second connection line 245 are formed thereon (see FIGS. 3 and 4). Also, the lead-out wiring 25 connected to the terminal 67 from the interlayer insulating film 83 to the peripheral region 11 beyond the edges of the interlayer insulating film 83, the base insulating film 81, and the sealing film 70 is a different layer first connection line. 235 and the different layer second connection line 245 are formed at the same time.
  • FIG. 18F shows a process of forming a protective film 85 or the like that covers the touch sensor 20.
  • the protective film 85 is formed so as to cover the entire touch sensor 20 and further the lead-out wiring 25 and the terminal 67.
  • the protective film 85 is made of an organic insulating material such as acrylic resin.
  • a circularly polarizing film 87 is disposed on the protective film 85, and a cover film 89 is disposed on the circularly polarizing film 87.
  • the FPC 13 is connected to the terminal 68 not covered with the protective film 85 via the anisotropic conductive member 139.
  • the touch sensor 20 includes the first electrode 21 and the second electrode 22 that configure the drive electrode and the detection electrode of the capacitive touch sensor. 20 may further include an electrode for realizing a pressure-sensitive function in addition to these electrodes.
  • an organic EL display device has been exemplified as a disclosure example, but as other application examples, a liquid crystal display device, another self-luminous display device, or an electronic paper display device having an electrophoretic element or the like Any flat panel display device can be used. Moreover, it cannot be overemphasized that it can apply, without specifically limiting from a small size to a large size.

Abstract

L'invention concerne un capteur tactile, comprenant : une pluralité de premières électrodes qui ont été disposées en deux dimensions, les premières électrodes qui sont adjacentes dans une première direction étant connectées par l'intermédiaire de premiers fils de connexion de la même couche que les premières électrodes ou d'une couche différente ; une pluralité de secondes électrodes qui ont été disposées en deux dimensions dans la même couche que les premières électrodes et qui sont respectivement entourées par les premières électrodes, les secondes électrodes qui sont adjacentes dans une seconde direction étant connectées par l'intermédiaire de seconds fils de connexion de la même couche que les premières électrodes et les secondes électrodes ou d'une couche différente et qui croisent les premiers fils de connexion dans une vue en plan ; et un film isolant qui est interposé entre les premiers fils de connexion et les seconds fils de connexion. Des premières parties d'intersection où les premiers fils de connexion de la même couche que les premières électrodes et les secondes électrodes croisent les seconds fils de connexion de la couche différente des premières électrodes et des secondes électrodes sont adjacentes à des secondes parties d'intersection où les premiers fils de connexion de la couche différente des premières électrodes et des secondes électrodes croisent les seconds fils de connexion de la même couche que les premières électrodes et les secondes électrodes.
PCT/JP2017/040565 2017-01-25 2017-11-10 Capteur tactile et dispositif d'affichage avec capteur tactile intégré WO2018139009A1 (fr)

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JP2017-011076 2017-01-25
JP2017011076A JP2018120397A (ja) 2017-01-25 2017-01-25 タッチセンサ及びタッチセンサ内蔵表示装置

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KR102409648B1 (ko) 2017-12-14 2022-06-16 엘지디스플레이 주식회사 터치표시장치 및 표시패널
KR20200102036A (ko) 2019-02-20 2020-08-31 삼성디스플레이 주식회사 표시장치 및 터치센서
CN116868154A (zh) 2021-03-01 2023-10-10 阿尔卑斯阿尔派株式会社 电极构件

Citations (3)

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Publication number Priority date Publication date Assignee Title
JP3191207U (ja) * 2013-03-30 2014-06-12 ナンチャン オー−フィルム オプティカル ディスプレイ テクノロジー カンパニー リミテッド 偏光板モジュール及び偏光板モジュールを用いたタッチスクリーン
JP2015153297A (ja) * 2014-02-18 2015-08-24 Ｎｌｔテクノロジー株式会社 タッチセンサー基板、画像表示装置、およびタッチセンサー基板の製造方法
WO2016002583A1 (fr) * 2014-07-02 2016-01-07 日本航空電子工業株式会社 Panneau tactile

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3191207U (ja) * 2013-03-30 2014-06-12 ナンチャン オー−フィルム オプティカル ディスプレイ テクノロジー カンパニー リミテッド 偏光板モジュール及び偏光板モジュールを用いたタッチスクリーン
JP2015153297A (ja) * 2014-02-18 2015-08-24 Ｎｌｔテクノロジー株式会社 タッチセンサー基板、画像表示装置、およびタッチセンサー基板の製造方法
WO2016002583A1 (fr) * 2014-07-02 2016-01-07 日本航空電子工業株式会社 Panneau tactile

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