WO2019093233A1 - Capteur tactile - Google Patents

Capteur tactile Download PDF

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Publication number
WO2019093233A1
WO2019093233A1 PCT/JP2018/040795 JP2018040795W WO2019093233A1 WO 2019093233 A1 WO2019093233 A1 WO 2019093233A1 JP 2018040795 W JP2018040795 W JP 2018040795W WO 2019093233 A1 WO2019093233 A1 WO 2019093233A1
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WO
WIPO (PCT)
Prior art keywords
electrode
touch sensor
substrate
disposed
floating
Prior art date
Application number
PCT/JP2018/040795
Other languages
English (en)
Japanese (ja)
Inventor
桂舟 村岡
健二 柴田
由樹 谷口
Original Assignee
パナソニックＩｐマネジメント株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to JP2019552759A priority Critical patent/JPWO2019093233A1/ja
Publication of WO2019093233A1 publication Critical patent/WO2019093233A1/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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means

Definitions

  • the present disclosure relates to a touch sensor.
  • Patent Document 1 As a touch sensor capable of touch operation and press operation, for example, the one shown in Patent Document 1 is known.
  • Patent Document 1 a substrate, first and second electrodes formed on the substrate and spaced from each other, a display module disposed above the substrate, and a display module are disposed.
  • a touch sensor comprising a panel and a spacer layer formed between the display module and the panel.
  • the display module is capable of bending and deforming so as to be reduced in thickness by receiving pressure on the panel.
  • the display module has a reference potential layer disposed to face the first electrode and the second electrode. The reference potential layer is previously set to the ground potential.
  • the touch sensor includes one or more substrates, any one of the one or more substrates, a transmitting electrode capable of emitting an electric field, and any one or more of the one or more substrates.
  • a receiving electrode which is disposed at a distance from the transmitting electrode and can receive an electric field from the transmitting electrode, a ground electrode disposed at any one of the one or more substrates, and the one or more receiving electrodes.
  • a floating electrode disposed in the first direction of the above substrate.
  • the floating electrode When viewed in the first direction, the floating electrode is disposed so as to overlap at least a portion of the ground electrode, at least a portion of the transmission electrode, and at least a portion of the reception electrode;
  • the transmitting electrode, the receiving electrode, and the ground electrode are electrically independent of each other, and the floating electrode and the ground electrode are pressed by the first direction or a direction opposite to the first direction.
  • the electrical connection state in the touch sensor can be simplified.
  • FIG. 1 is an overall perspective view of the touch sensor according to the first embodiment.
  • FIG. 2 is an exploded perspective view showing the configuration of the touch sensor according to the first embodiment.
  • FIG. 3 is a cross-sectional view taken along line III-III of FIG.
  • FIG. 4 is a view showing a state where a pressing force is applied to the touch sensor shown in FIG.
  • FIG. 5 is a schematic view showing in plan the overlapping state of the transmission electrode, the reception electrode, and the ground electrode and the floating electrode.
  • FIG. 6A is a schematic view showing in plan the overlapping state of the transmission electrode, the reception electrode, and the ground electrode and the floating electrode.
  • FIG. 6B is a schematic view showing in plan the overlapping state of the transmitting electrode, the receiving electrode, and the ground electrode and the floating electrode.
  • FIG. 1 is an overall perspective view of the touch sensor according to the first embodiment.
  • FIG. 2 is an exploded perspective view showing the configuration of the touch sensor according to the first embodiment.
  • FIG. 3 is a cross-
  • FIG. 7 is a cross-sectional view showing the configuration of the touch sensor according to the second embodiment.
  • FIG. 8A is an exploded perspective view showing the configuration of the touch sensor according to the third embodiment.
  • FIG. 8B is an exploded perspective view showing the configuration of the touch sensor according to Embodiment 4.
  • FIG. 9 is an exploded perspective view showing the configuration of the touch sensor according to the fifth embodiment.
  • FIG. 10A is a cross-sectional view showing a configuration of a touch sensor according to Embodiment 5.
  • FIG. 10B is a cross-sectional view showing a state in which the touch sensor shown in FIG. 10A is pressed.
  • FIG. 11 is a top view showing the positional relationship between the base and the spring in the fifth embodiment.
  • 12A is a perspective view of a spring according to Embodiment 5.
  • FIG. 12B is a top view of a spring according to Embodiment 5.
  • FIG. 12C is a side view of a spring according to Embodiment 5.
  • the distance between the reference potential layer and the first electrode and the distance between the reference potential layer and the second electrode are reduced by the display module and the spacer layer.
  • the capacitance is absorbed by the reference potential layer, the mutual capacitance between the first electrode and the second electrode is reduced.
  • the amount of decrease in mutual capacitance is acquired by the electrode on the receiving side, and the magnitude of the pressure due to the pressing operation is calculated.
  • the reference potential layer must be set in advance to the ground potential. That is, an electrical connection state for setting the reference potential layer to the ground potential in the touch sensor must be formed in advance. For this reason, there is a possibility that the electrical connection state in the touch sensor may be complicated.
  • FIG. 1 shows the entire touch sensor 1 according to the first embodiment.
  • the touch sensor 1 is a sensor-type input device capable of touch operation and press operation.
  • the touch sensor 1 is, for example, various devices in which a display device such as a liquid crystal display or an organic EL display is incorporated (for example, an in-vehicle device such as a car navigation, a display device of a personal computer, a mobile phone, a portable information terminal, a portable game machine, It is used as an input device for copying machines, ticket machines, automatic teller machines, etc.).
  • the X direction is a direction from left to right of the touch sensor 1 shown in FIG. 1
  • the Y direction is a direction from the front side to the back of the touch sensor 1 shown in FIG.
  • the direction from top to bottom of the touch sensor 1 is defined. Note that such a positional relationship is irrelevant to the actual direction in the touch sensor 1 or the device in which the touch sensor 1 is incorporated.
  • the touch sensor 1 includes a cover member 2 having light transparency.
  • the cover member 2 contains glass or resin.
  • the cover member 2 is formed, for example, in a rectangular plate shape, and is stacked on the upper surface of a third substrate 13 described later (see FIGS. 2 and 3).
  • a window frame portion 3 having a substantially frame shape in dark color such as black is formed by printing or the like.
  • a translucent operation surface 4 is formed in the internal rectangular area surrounded by the window frame portion 3.
  • the operation surface 4 is mainly configured as a surface on which a user's finger or the like contacts with the touch operation of the touch sensor 1.
  • the touch sensor 1 has a flexible wiring board 5.
  • the flexible wiring board 5 is configured so as to be flexible and not change its electrical characteristics even in a deformed state.
  • the flexible wiring board 5 includes, for example, a flexible insulating film such as polyimide (PI), polyethylene terephthalate (PET), polyethylene naphthalate (PEN) or the like.
  • the touch sensor 1 includes a first substrate 11, a second substrate 12, and a third substrate 13.
  • the first substrate 11 includes, for example, a resin material having light transmittance such as polycarbonate, polyethylene terephthalate, polyether sulfone, PMMA (acrylic), COP (cycloolefin polymer) or the like, or glass.
  • the first substrate 11 is formed in a rectangular shape, and has a thickness of, for example, about 1 to 3 mm. Further, the first substrate 11 has a first surface R1 and a second surface R2 located on the opposite side of the first surface R1.
  • the second substrate 12 is disposed below the first substrate 11 so that the upper surface thereof faces the second surface R2 of the first substrate 11.
  • the third substrate 13 is stacked on the first substrate 11 so that the lower surface faces the first surface R1.
  • Each of the second substrate 12 and the third substrate 13 includes the same resin material and glass as the first substrate 11 and has the same shape and thickness as the first substrate 11.
  • a liquid crystal display (LCD) 19 is disposed below the third substrate 13.
  • the first surface R1 of the first substrate 11 is provided with a sensor unit (not shown) for enabling a touch operation. Further, the sensor portion is provided with a substrate wiring (not shown) for electrically connecting to an external circuit (not shown) through the flexible wiring board 5.
  • the transmission electrode 21 and the reception electrode 22 are provided on the first substrate 11.
  • the transmission electrode 21 and the reception electrode 22 are disposed in the vicinity of a corner on the first surface R1.
  • the transmission electrode 21 and the reception electrode 22 are hatched by dots.
  • the transmission electrode 21 is connected to a drive circuit (not shown) and configured to emit an electric field to the surroundings by the drive circuit.
  • the transmission electrode 21 is stacked on the first surface R1 of the first substrate 11, and is disposed at a position closer to the peripheral portion of the first surface R1 of the first substrate 11 than the position of the ground electrode 23 described later.
  • the material of the transmission electrode 21 is, for example, a transparent electrode containing a metal oxide such as indium tin oxide or tin oxide, a metal electrode such as copper, silver or gold, or a metal electrode which is difficult to see by thinning or blackening a metal. Is used.
  • the transmission electrode 21 is formed in substantially T shape, it is not restricted to this shape, It is possible to make it various shapes.
  • the transmission electrode 21 may be comb-shaped.
  • the receiving electrode 22 is configured to receive the electric field emitted from the transmitting electrode 21.
  • the receiving electrode 22 is made of the same material as the transmitting electrode 21 and formed in a substantially C shape. Further, the receiving electrode 22 is stacked on the first surface R1 of the first substrate 11, and is disposed to face the transmitting electrode 21 with a gap. Specifically, the receiving electrode 22 is disposed such that the C-shaped opening portion faces the convex portion of the transmitting electrode 21.
  • the shape of the receiving electrode 22 is not limited to the substantially C shape, but can be various shapes. For example, the receiving electrode 22 may be comb-shaped. When each of the transmission electrode 21 and the reception electrode 22 has a comb shape, the projection and the recess can be arranged to face each other.
  • the transmission electrode 21 and the reception electrode 22 are disposed on the same substrate (here, the first substrate 11) in the present embodiment, they need not necessarily be disposed on the same substrate, and may be disposed on different substrates. Good. Moreover, although it arrange
  • the ground electrode 23 set to the ground potential is stacked.
  • the ground electrode 23 is made of, for example, the same material as that of the transmission electrode 21 and is formed in a substantially rectangular shape whose long side extends along the Y direction. Further, the ground electrode 23 is disposed at an interval from the transmission electrode 21 and the reception electrode 22. In FIG. 2, the ground electrode 23 is adjacent to the receiving electrode 22 at an interval.
  • the transmission electrode 21, the reception electrode 22, and the ground electrode 23 are hatched by dots.
  • Each of the transmission electrode 21, the reception electrode 22, and the ground electrode 23 is provided with corresponding lead wirings 24a, 24b, and 24c for electrically connecting to an external circuit (not shown).
  • the lead wirings 24 a to 24 c are formed on the first surface R 1 of the first substrate 11.
  • One end of the lead-out wiring 24 a is electrically connected to the transmission electrode 21, and the other end of the lead-out wiring 24 a is electrically connected to the flexible wiring board 5.
  • One end of the lead wiring 24 b is electrically connected to the reception electrode 22, and the other end of the lead wiring 24 b is electrically connected to the flexible wiring board 5.
  • One end of the lead-out wiring 24 c is electrically connected to the ground electrode 23, and the other end of the lead-out wiring 24 c is electrically connected to the flexible wiring board 5.
  • the floating electrode 25 is disposed below the transmission electrode 21, the reception electrode 22, and the ground electrode 23.
  • the floating electrode 25 is electrically independent of each of the transmission electrode 21, the reception electrode 22, and the ground electrode 23 and is not electrically connected to an external circuit (not shown).
  • a material of the floating electrode 25 for example, a copper foil tape, a thin plate material made of metal or the like is preferable.
  • FIG. 5 is a schematic plan view showing an overlapping state of the transmission electrode 21, the reception electrode 22, and the ground electrode 23 and the floating electrode 25 as viewed from above.
  • the floating electrode 25 is stacked on the upper surface of the second substrate 12 and has a long side extending in the Y direction and formed in a substantially rectangular shape.
  • the floating electrode 25 when viewed from the top, all of the ground electrodes 23 overlap the floating electrodes 25.
  • the peripheral portion of the floating electrode 25 is shown by a broken line in FIG.
  • all of the transmission electrodes 21 and all of the reception electrodes overlap the floating electrode 25.
  • the floating electrode 25 is formed to overlap with all of the transmission electrode 21, the reception electrode 22, and the ground electrode 23. That is, the floating electrode 25 faces all of the transmission electrode 21, the reception electrode 22, and the ground electrode 23 through the first substrate 11 and the elastic member 15 when viewed in the Z direction.
  • the floating electrode 25 is preferably formed to have a length (width dimension) in the X direction larger than a length (width dimension) in the X direction of the ground electrode 23. Furthermore, the floating electrode 25 is more preferably formed such that both sides in the X direction are positioned outside the both sides in the X direction of the ground electrode 23.
  • a shielding electrode 26 set to the ground potential is formed on the upper surface of the third substrate 13.
  • the shielding electrode 26 is made of the same material as that of the transmitting electrode 21 and is formed in a substantially rectangular shape whose long side extends along the Y direction.
  • the shield electrode 26 is disposed at a position overlapping the transmission electrode 21 and the reception electrode 22 via the third substrate 13 when viewed in the Z direction.
  • the shielding electrode 26 is provided with a lead wiring 24 d for electrically connecting to an external circuit (not shown). In order to prevent the user's finger touching the touch sensor 1 from affecting the capacitance generated between the transmission electrode 21 and the reception electrode 22, the shielding electrode 26 is formed.
  • the elastic member 15 receives the pressing force F (force in the Z direction) toward the first substrate 11 when the touch sensor 1 is pressed to reduce the thickness, thereby reducing the thickness of the transmission electrode 21.
  • the receiving electrode 22 and the ground electrode 23 approaches the floating electrode 25.
  • the elastic member 15 is formed in a rectangular flat plate shape.
  • the elastic member 15 is preferably formed to have a thickness greater than the thickness of the first substrate 11 (that is, the distance between the first surface R1 and the second surface R2). Further, when viewed from above, the floating electrode 25 is formed to be disposed inside the outer edge of the elastic member 15.
  • the elastic member 15 is disposed on the upper surface of the second substrate 12. That is, the elastic member 15 is disposed between the second surface R2 of the first substrate 11 and the upper surface of the second substrate 12. That is, the elastic member 15 is disposed between the ground electrode 23 and the floating electrode 25. By this arrangement, the ground electrode 23 is arranged to face the floating electrode 25 via the elastic member 15.
  • a material of the elastic member 15 for example, an optical transparent double-sided sheet (OCA) having a relatively high elastic modulus, a thin plate material made of rubber or the like is preferable.
  • the pressing force F in the Z direction (first direction)
  • the elastic member 15 is elastically deformed by (the force in the first direction) so as to reduce the thickness.
  • the pressing force F is described as a force in the first direction, the same change occurs even in the direction opposite to the first direction (in the direction from the lower side to the upper side in FIG. 4).
  • the elastic member 15 is elastically deformed so that the thickness is from the dimension d1 (see FIG. 3) to the dimension d2 (see FIG. 4). That is, when receiving the pressing force F, the elastic member 15 is compressed in the Z direction.
  • each of the transmission electrode 21, the reception electrode 22, and the ground electrode 23 and the floating electrode 25 come close to each other.
  • the potential difference between the ground electrode 23 and the floating electrode 25 decreases. That is, the potential of the floating electrode 25 comes closer to the ground potential.
  • the transmission electrode 21 and the reception electrode 22 approach the floating electrode 25, the electric field radiated from the transmission electrode 21 changes due to the relationship with the potential of the floating electrode 25 approaching the ground potential. That is, before and after the compressive deformation in the elastic member 15, the capacitance between the transmission electrode 21 and the reception electrode 22 changes. The change in capacitance is received by the receiving electrode 22, and a control circuit (not shown) electrically connected to the touch sensor 1 determines the state of the pressing operation on the operation surface 4.
  • the floating electrode 25 is electrically independent of each of the transmission electrode 21, the receiving electrode 22, and the ground electrode 23, the floating electrode 25 has a ground potential in the touch sensor 1. It is not necessary to form an electrical connection state for setting. Thereby, the electrical connection state in the touch sensor 1 can be simplified.
  • the touch sensor 1 is configured such that the distance between the ground electrode 23 and the floating electrode 25 is reduced by the pressing force F of the pressing operation. Therefore, as the ground electrode 23 approaches the floating electrode 25 due to the pressing force F, the floating electrode 25 approaches the ground potential. On the other hand, as the transmission electrode 21 and the reception electrode 22 approach the floating electrode 25, the capacitance between the transmission electrode 21 and the reception electrode 22 changes. As a result, in a configuration in which a control unit (not shown) is combined with the touch sensor 1, the control unit can perform pressure sensing in accordance with the pressing operation. Furthermore, for example, even when the pressing force F is relatively weak, the change in electrostatic capacitance between the transmission electrode 21 and the receiving electrode 22 is likely to occur as the potential of the floating electrode 25 approaches the ground potential. It is also possible to accurately detect the pressure value of F by the control unit.
  • the elastic member 15 is disposed between the ground electrode 23 and the floating electrode 25, and the ground electrode 23 faces the floating electrode 25 with the elastic member 15 interposed therebetween. For this reason, when the elastic member 15 receives the pressing force F and is compressed in the Z direction (first direction), the ground electrode 23 approaches the floating electrode 25. The floating electrode 25 can be appropriately brought close to the ground potential by the action of the elastic member 15.
  • the elastic member 15 is disposed between the second surface R2 of the first substrate 11 and the upper surface of the second substrate 12 opposed to the second surface R2. Therefore, when the elastic member 15 is compressed by the pressing force F, the distance between the first substrate 11 and the second substrate 12 decreases. By providing the elastic member 15, the ground electrode 23 can be easily approached toward the floating electrode 25.
  • the thickness of the elastic member 15 in the Z direction is formed to be larger than the thickness of the first substrate 11. Therefore, when the elastic member 15 receives the pressing force F and is compressed, the amount of displacement due to the compression is determined by the distance between the first surface R1 and the second surface R2 of the first substrate 11 (the first substrate 11 It is possible to make the thickness of the As a result, the distance by which the ground electrode 23 moves toward the floating electrode 25 can be made relatively long, and the potential of the floating electrode 25 changes as the potential of the floating electrode 25 approaches the ground potential. Capacitance can be greatly changed.
  • the floating electrode 25 is formed such that the width in the X direction (second direction) is larger than the width in the X direction of the ground electrode 23. As a result, the entire width in the X direction of the ground electrode 23 faces the floating electrode 25. As a result, the floating electrode 25 can be efficiently brought close to the ground potential.
  • ground electrodes 23 face the floating electrodes 25 via the first substrate 11. Thus, when the pressing force F acts on the touch sensor 1, all of the ground electrode 23 approaches the floating electrode 25, so the floating electrode 25 can be efficiently brought close to the ground potential.
  • the floating electrode 25 when viewed in the first direction, the floating electrode 25 is formed to be disposed inside the outer edge of the elastic member 15. Therefore, the transmission electrode 21, the reception electrode 22, and the ground electrode 23 can be brought close to the floating electrode 25 so that a planar deviation does not occur when the pressing force F acts on the touch sensor 1.
  • ground electrode 23 may overlap with the floating electrode 25.
  • a part (approximately half in the example of FIG. 6A) of the ground electrode 23 faces the floating electrode 25 via the first substrate 11 in the Z direction.
  • a part of the transmission electrode 21 and the reception electrode 22 may overlap with the floating electrode 25.
  • a part of the transmission electrode 21, a part of the reception electrode 22, and a part of the ground electrode 23 face the floating electrode 25 with the first substrate 11 in the Z direction.
  • the third substrate 13 and the shielding electrode 26 are disposed above the first substrate 11. However, as shown in FIG. 7, in the second embodiment, the third substrate 13 and the shielding electrode 26 are disposed. It has not been. That is, the third substrate 13 and the shielding electrode 26 do not necessarily have to be configured.
  • the floating electrode 25 is disposed on the first substrate 11, and the transmission electrode 21, the receiving electrode 22, and the ground electrode 23 are disposed on the second substrate 12.
  • the touch sensor 1 according to the third embodiment will be described with reference to FIG. 8A.
  • the operation unit 27 for pressing operation is provided on the upper surface of the window frame portion 3 of the cover member 2.
  • the operation unit 27 is formed in, for example, a substantially rectangular shape, and is disposed at a position corresponding to the upper side of the transmission electrode 21 and the reception electrode 22 on the top surface of the cover member 2.
  • the touch sensor 1 according to the fourth embodiment will be described with reference to FIG. 8B.
  • the transmission electrode 21, the reception electrode 22 and the ground electrode 23 are disposed on the first substrate 11, but the transmission electrode 21, the reception electrode 22 and the ground electrode 23 are not necessarily the same substrate (here, It does not have to be disposed on one substrate 11).
  • the transmission electrode 21 and the reception electrode 22 may be disposed on the third substrate 13, and the ground electrode 23 may be disposed on the first substrate 11.
  • the transmission electrode 21, the reception electrode 22, and the ground electrode 23 are disposed on the first substrate 11, and the floating electrode 25 is disposed on the second substrate 12. As shown in FIG. 7, the transmission electrode 21, the reception electrode 22, and the ground electrode 23 may be disposed on the second substrate 12, and the floating electrode 25 may be disposed on the first substrate 11.
  • each of the transmission electrode 21, the reception electrode 22, and the ground electrode 23 may be disposed on different substrates.
  • the transmission electrode 21, the reception electrode 22, and the ground electrode 23 are disposed on the upper surface of the substrate, but may be disposed on the lower surface.
  • positioned is not specifically limited.
  • the floating electrode 25 may be disposed on the liquid crystal display 19 without configuring the second substrate 12.
  • the transmission electrode 21, the reception electrode 22, and the ground electrode 23 do not necessarily have to be disposed on the same substrate (here, the first substrate 11).
  • the electrodes such as the transmission electrode 21, the reception electrode 22, the ground electrode 23, and the floating electrode 25 do not have to be disposed on the upper surface of the substrate, and may be disposed on the lower surface.
  • the touch sensor 1 according to the fifth embodiment will be described with reference to FIGS. 9 to 10B.
  • symbol may be attached
  • the liquid crystal display 19 is disposed below the second substrate 12.
  • the vibration unit 50 is disposed below the base material 30.
  • the second substrate 12 is not formed, and the floating electrode 25 is disposed on the base 30.
  • the elastic member 15 is not formed, and instead, the spring 40 (elastic body) disposed between the cover member 2 and the base 30 is provided.
  • the third substrate 13 and the first substrate 11 are disposed below the cover member 2 so that the third substrate 13 is located above and the first substrate 11 is located below.
  • the three substrates 13 and the first substrate 11 are integrated through the transparent adhesive layer.
  • a liquid crystal display 19 (not shown in FIGS. 9 to 10B) is mounted on the lower surface of the first substrate 11 and integrated with the cover member 2.
  • the cover member 2 integrated with the third substrate 13, the first substrate 11, and the liquid crystal display 19 is disposed on the base 30 via a spring 40.
  • the locations where the springs 40 are disposed are indicated by arrows. That is, the spring 40 is disposed to connect the lower surface of the cover member 2 and the base 30.
  • FIG. 10A is a cross-sectional view showing the configuration of the touch sensor 1 according to the fifth embodiment, and shows a state before pressing from above.
  • FIG. 10B shows a state in which the touch sensor 1 shown in FIG. 10A is pressed from above.
  • the cover member 2 is supported by four springs 40 disposed on the upper surface of the base material 30, and can be depressed by a predetermined distance from above.
  • a space (air layer 100) larger than the predetermined distance exists between the first substrate 11 and the floating electrode 25 and the base material 30.
  • the air layer 100 is compressed by pressing the cover member 2 from above. That is, the thickness of the air layer between the cover member 2 and the base 30 is compressed from the length L1 to the length L2.
  • the spring 40 is in contact with the lower surface of the cover member 2, and the other end (lower end 40c) of the spring 40 is It is in contact with the top surface of the substrate 30.
  • the springs 40 are disposed at the four corners of the substrate 30.
  • the spring 40 preferably does not overlap with any of the transmission electrode 21, the reception electrode 22, the ground electrode 23, and the floating electrode 25 in plan view. With this configuration, unnecessary capacitive coupling to the spring 40 can be suppressed, and the influence on radio waves can also be reduced.
  • FIG. 11 is a top view showing the positional relationship between the base 30 and the spring 40.
  • FIG. 12A is a perspective view of the spring 40
  • FIG. 12B is a top view of the spring 40
  • FIG. 12C is a side view of the spring 40.
  • the spring 40 has a substantially rectangular shape elongated in the X direction in plan view.
  • the spring 40 has an upper end portion 40a, a middle portion 40b, and a lower end portion 40c, which are arranged along the longitudinal direction (X direction).
  • the spring 40 is bent at the boundary between the upper end 40a and the middle 40b, and is bent at the boundary between the middle 40b and the lower end 40c.
  • the intermediate portion 40b is inclined with respect to a horizontal surface (surface along the X direction and the Y direction) from the upper end 40a to the lower end 40c.
  • FIGS. 9 and 11 four springs 40 are disposed at the four corners between the cover member 2 and the base 30. Although the spring 40 is not shown in FIG. 10 in order to make the drawing easy to understand, the spring 40 is disposed between the cover member 2 and the base 30. The place where the spring 40 is disposed is indicated by an arrow in FIG.
  • the four springs 40 arranged at the four corners of the substrate 30 are arranged to extend in the X direction.
  • the four springs 40 are all arranged in the same direction, and the upper end 40a is arranged in the X direction (right side in FIG. 11).
  • the lower end portion 40c is disposed so as to be located in the direction opposite to the X direction (left side in FIG. 11).
  • the lower end portion 40 c of the spring 40 is fixed to the base material 30, and the upper end portion 40 a of the spring 40 is fixed to the lower surface of the cover member 2.
  • the fixing method is not particularly limited.
  • only the lower end 40c may be fixed to the base material 30, and the upper end 40a may not be fixed to the cover member 2 and may be in contact with the cover member 2. Conversely, only the upper end 40 a may be fixed to the cover member 2, and the lower end 40 c may not be fixed to the base 30 and may be in contact with the base 30.
  • a vibrating unit 50 is disposed below the base material 30.
  • the vibration unit 50 gives the base 30 a vibration that shakes in the Y direction.
  • the description of the mechanism for generating the vibration of the vibrating unit 50 is omitted, as the vibrating unit 50, a motor etc. may be mentioned.
  • the vibrating portion 50 is shown in a plate shape for ease of explanation, but it only shows the positional relationship with the substrate 30, and the shape of the vibrating portion 50 is a plate It is not necessarily the case.
  • the base material 30 and the vibration part 50 may be integrally formed.
  • the upper surface of the vibrating portion 50 is used as the base material 30, and the floating electrode 25 is formed on the upper surface of the vibrating portion 50.
  • the base 30 is made of a conductive metal or the arrangement range of the floating electrode 25 of the base 30 is partially made of a conductive metal, it is not necessary to configure the floating electrode 25.
  • the conductive metal case portion of the vibrating portion 50 may be used instead of the floating electrode 25.
  • the cover member 2 When the cover member 2 is pushed down, the four springs 40 bend and the cover member 2 approaches the substrate 30. That is, the cover member 2 moves to the base material 30 side so that the distance of the arrow shown to FIG. 10A becomes short.
  • the spring 40 of the present embodiment is in the shape of a flat spring as shown in FIG. 12A, when the cover member 2 is pushed down, the inclination angle of the intermediate portion 40b becomes gentle with respect to the horizontal surface, and the cover member 2 slightly Move in the X direction and approach the substrate 30. At this time, the distance of the above-mentioned space (the thickness of the air layer 100) is narrowed. Even if the cover member 2 is pressed, some remaining space exists between the cover member 2 and the base material 30.
  • the distance between the floating electrode 25 and the transmission electrode 21, the reception electrode 22, and the ground electrode 23 decreases. Also in the touch sensor 1 according to the present embodiment, the depressed state can be detected as in the first embodiment described above.
  • the four springs 40 return to their original shapes and return to the state before the operation.
  • position control of the cover member 2 with a housing (not shown) or the like makes it easy for the cover member 2 to return to the position before the operation.
  • the base material 30 vibrates in the Y direction.
  • the four springs 40 are arranged to extend in a direction (X direction) orthogonal to the vibration direction (Y direction) of the base material 30.
  • the spring 40 is fixed between the base 30 and the cover member 2.
  • the vibration of the substrate 30 absorbed by the four springs 40 is small. That is, by making the vibration direction and the extension direction of the spring 40 orthogonal, the vibration in the base material 30 is efficiently transmitted to the cover member 2 even if there is a remaining space.
  • the extension directions of the four springs 40 and the vibration directions of the base material 30 (that is, the vibration directions of the vibrating portion 50 transmitted to the base material 30) be orthogonal to each other. That is, it is desirable to set the vibration direction of the base material 30 in the direction in which the four springs 40 do not easily bend.
  • the vibration unit 50 operates in response to the detection unit (not shown) detecting that the distance between the transmission electrode 21, the reception electrode 22, and the ground electrode 23 with respect to the floating electrode 25 approaches. It may be configured.
  • the user who operates (presses) the cover member 2 may operate the vibration unit 50 so as to obtain a click feeling.
  • the sense of click here means the sense of click that can be obtained when the switch is pressed.
  • the user may operate the vibration unit 50 so as to obtain a plurality of clicks at short time intervals through the cover member 2.
  • the user may operate the vibration unit 50 to obtain vibration for a predetermined time through the cover member 2.
  • the vibration unit 50 may be operated such that the magnitude of the vibration is variable according to the amount of depression of the user.
  • the four springs 40 preferably have a shape or arrangement that hardly absorbs the vibration in the vibration direction of the base material 30, and may be other than the shape or the arrangement described above. The number is also not limited to four.
  • the push detection mechanism in which a person presses the cover member 2.
  • the pressing detection mechanism may have another configuration. Further, the configuration may be such that the pressing detection mechanism is not provided. In many cases, a component that can obtain vibration from the cover member 2 is required. In response to such a demand, it is determined as appropriate whether to adopt a form having a pressing detection mechanism or a form not having a pressing detection mechanism.
  • Embodiment 5 demonstrated using the spring 40 which is a leaf
  • the floating electrode 25 overlaps the transmitting electrode 21, the receiving electrode 22 and the ground electrode in plan view (viewed in the Z direction), but the present invention is not limited to this configuration.
  • the floating electrode 25 may overlap at least the receiving electrode 22 and the ground electrode 23 in plan view. However, when the floating electrode 25 overlaps with the transmission electrode 21, the capacitance between the transmission electrode 21 and the reception electrode 22 can be largely changed, and the detection accuracy of the pressing operation can be further improved.
  • the ground electrode 23 may be disposed above the transmission electrode 21 so that the ground electrode 23 and the transmission electrode 21 overlap each other in plan view.
  • the receiving electrode 22 may be disposed above the ground electrode 23, and the ground electrode 23 and the receiving electrode 22 may be disposed so as to overlap in a plan view.
  • the floating electrode 25 is stacked on the upper surface of the second substrate 12.
  • the present invention is not limited to this embodiment, and the floating electrode 25 may be stacked on the lower surface of the second substrate 12. Good.
  • the floating member 25 may be disposed at an interval in the Z direction from the lower surface (the second surface R2) of the first substrate 11 without forming the elastic member 15 (not shown). That is, the air layer and the first substrate 11 may be disposed between the ground electrode 23 and the floating electrode 25.
  • the first substrate 11 is preferably supported so as to be deformed toward the second substrate 12 by a support (not shown) or the like. The first substrate 11 is deformed so as to bend in the Z direction in response to the pressing force F (force in the Z direction), and comes close to the second substrate 12 toward the air layer. Thereby, the distance between the ground electrode 23 and the floating electrode 25 is reduced.
  • the elastic member 15 is omitted, the same function and effect as those of the above-described embodiment can be obtained.
  • substrate 11 and the elastic member 15 are formed as another member, it does not restrict to this form.
  • the first substrate 11 may be formed of an elastic body.
  • the touch sensor 1 does not have to include the elastic member 15.
  • the positional relationship between the transmission electrode 21 and the reception electrode 22 in plan view may be interchanged, and the transmission electrode 21 may be disposed closer to the ground electrode 23 than the reception electrode 22.
  • the elastic member 15 is the same magnitude
  • the form which can be pressed and operated from the upper side (upper surface side of the cover member 2) of the touch sensor 1 was shown, it does not restrict to this form. That is, the form may be such that pressing operation can be performed from the lower side of the touch sensor 1.
  • the touch sensor 1 of the present disclosure includes any one of one or more substrates (the first substrate 11, the second substrate 12, the third substrate 13, etc.) and the first substrate 11, the second substrate 12, or the third substrate 13. Are disposed on any one of the transmission electrode 21 capable of emitting an electric field, the first substrate 11, the second substrate 12, and the third substrate 13 and spaced apart from the transmission electrode 21.
  • the receiving electrode 22 capable of receiving an electric field, the ground electrode 23 disposed on any of the first substrate 11, the second substrate 12, and the third substrate 13, and the first substrate 11, the second substrate 12, and the third substrate 13.
  • a floating electrode 25 disposed in the Z direction.
  • the floating electrode 25 When viewed in the Z direction, the floating electrode 25 is disposed to overlap at least a portion of the ground electrode 23, at least a portion of the transmission electrode 21, and at least a portion of the reception electrode 22.
  • the floating electrode 25, the transmitting electrode 21, the receiving electrode 22, and the ground electrode 23 are electrically independent of each other.
  • the distance between the floating electrode 25 and the ground electrode 23 is reduced by pressing in the Z direction or the direction opposite to the Z direction.
  • the touch sensor 1 of the present disclosure may further include an elastic member 15 disposed between the ground electrode 23 and the floating electrode 25. More preferably, the elastic member 15 is compressed by pressing in the Z direction or a direction opposite to the Z direction, and the elastic member 15 is compressed to reduce the distance between the floating electrode 25 and the ground electrode 23.
  • the thickness of the elastic member 15 in the Z direction is the thickness of the first substrate 11 of the first substrate 11, the second substrate 12, and the third substrate 13 on which the ground electrode 23 is disposed. It is more preferable that the thickness is larger.
  • the touch sensor 1 of the present disclosure it is more preferable that all of the ground electrodes 23 overlap the floating electrodes 25 when viewed in the Z direction.
  • the floating electrode 25 be disposed inside the outer edge of the elastic member 15 when viewed in the Z direction.
  • the touch sensor 1 of the present disclosure further includes a cover member 2, a base 30 on which the floating electrode 25 is disposed, and an elastic body (for example, a spring 40) located between the cover 2 and the base 30.
  • an elastic body for example, a spring 40 located between the cover 2 and the base 30.
  • An upper end 40 a of the spring 40 is in contact with the cover member 2, and a lower end 40 c of the spring 40 is in contact with the base 30.
  • One or more substrates are disposed between the cover member and the substrate 30.
  • the spring 40 is a leaf spring.
  • the spring 40 is disposed at a position not overlapping any of the transmission electrode 21, the reception electrode 22, the ground electrode 23, and the floating electrode 24 when viewed in the Z direction.
  • the touch sensor 1 of the present disclosure may further include a vibrating unit 50 that vibrates the base 30.
  • the direction in which the spring 40 extends is the X direction
  • the vibrating portion 50 vibrates the base along a direction (for example, the Y direction) orthogonal to the Z direction and intersecting the X direction. .
  • the “direction in which the spring 40 extends” is a direction connecting the upper end 40 a and the lower end 40 c when viewed in the Z direction.
  • the X direction and the Y direction are orthogonal to each other in the touch sensor 1 of the present disclosure.
  • the base 30 and the vibrating portion 50 may be integrally formed.
  • the present disclosure can be industrially used as a sensor-type input device that can be pressed.

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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)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

L'invention concerne un capteur tactile qui est pourvu : d'une électrode de transmission qui est agencée sur un ou plusieurs substrats ; d'une électrode de réception ; d'une électrode de masse ; et d'une électrode flottante qui est disposée dans une première direction du ou des substrats. Lorsqu'elle est vue depuis la première direction, l'électrode flottante est agencée de manière à chevaucher l'électrode de masse, l'électrode de transmission et l'électrode de réception. La distance entre l'électrode flottante et l'électrode de masse est réduite par pression à partir de la première direction ou par pression à partir d'une direction opposée à la première direction.
PCT/JP2018/040795 2017-11-08 2018-11-02 Capteur tactile WO2019093233A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019552759A JPWO2019093233A1 (ja) 2017-11-08 2018-11-02 タッチセンサ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-215488 2017-11-08
JP2017215488 2017-11-08

Publications (1)

Publication Number Publication Date
WO2019093233A1 true WO2019093233A1 (fr) 2019-05-16

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PCT/JP2018/040795 WO2019093233A1 (fr) 2017-11-08 2018-11-02 Capteur tactile

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JP (1) JPWO2019093233A1 (fr)
WO (1) WO2019093233A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113413152A (zh) * 2021-05-27 2021-09-21 深圳中学 一种非接触式手指运动检测仪器与方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010244514A (ja) * 2009-03-19 2010-10-28 Sony Corp センサ装置及び情報処理装置
US20170115768A1 (en) * 2015-10-21 2017-04-27 FocalTech Systems, Co. Ltd. Touch display device and driving method thereof
JP2017168103A (ja) * 2016-03-16 2017-09-21 株式会社 ハイディープＨｉＤｅｅｐ Ｉｎｃ． タッチ入力装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010244514A (ja) * 2009-03-19 2010-10-28 Sony Corp センサ装置及び情報処理装置
US20170115768A1 (en) * 2015-10-21 2017-04-27 FocalTech Systems, Co. Ltd. Touch display device and driving method thereof
JP2017168103A (ja) * 2016-03-16 2017-09-21 株式会社 ハイディープＨｉＤｅｅｐ Ｉｎｃ． タッチ入力装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113413152A (zh) * 2021-05-27 2021-09-21 深圳中学 一种非接触式手指运动检测仪器与方法

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