WO2017073949A1 - Capteur de pression et dispositif d'entrée tactile comprenant ce capteur - Google Patents

Capteur de pression et dispositif d'entrée tactile comprenant ce capteur Download PDF

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Publication number
WO2017073949A1
WO2017073949A1 PCT/KR2016/011798 KR2016011798W WO2017073949A1 WO 2017073949 A1 WO2017073949 A1 WO 2017073949A1 KR 2016011798 W KR2016011798 W KR 2016011798W WO 2017073949 A1 WO2017073949 A1 WO 2017073949A1
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WO
WIPO (PCT)
Prior art keywords
electrode
touch
pressure sensor
air
air gap
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Application number
PCT/KR2016/011798
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English (en)
Korean (ko)
Inventor
박인길
노태형
정준호
Original Assignee
주식회사 모다이노칩
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
Priority claimed from KR1020160129997A external-priority patent/KR101920014B1/ko
Application filed by 주식회사 모다이노칩 filed Critical 주식회사 모다이노칩
Priority to US15/771,279 priority Critical patent/US20180307361A1/en
Publication of WO2017073949A1 publication Critical patent/WO2017073949A1/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

Definitions

  • the present invention relates to a touch input device, and more particularly, to a pressure sensor capable of detecting a touch position and pressure, and a touch input device having the same.
  • input devices are used for the operation of electronic devices such as mobile communication terminals.
  • input devices such as buttons, keys, and touch screen panels are used.
  • the touch screen panel that is, the touch sensor, detects the touch of the human body, and thus the use of the electronic device is easy and simple to operate with only a light touch.
  • touch sensors are used not only for mobile communication terminals but also for manipulating devices in automobiles.
  • a touch sensor used in an electronic device such as a mobile communication terminal may be provided between a protective window and a liquid crystal display panel displaying an image. Therefore, when a character or a symbol is displayed through a window from the liquid crystal display panel, and the user touches the corresponding portion, the touch sensor detects the position and performs a specific process according to the control flow.
  • the present invention provides a pressure sensor capable of detecting a touch position and touch pressure and a touch input device having the same.
  • the present invention provides a touch input device capable of detecting a touch position and pressure by interlocking a touch sensor detecting a touch position with a pressure sensor detecting a touch position and pressure.
  • Pressure sensor includes a first electrode portion and a second electrode spaced apart from each other; An air gap provided between the first and second electrode portions; And an air gate provided at one side of the air gap and allowing air to flow in and out of the air gap.
  • the air gate is formed in at least one region of the spacer.
  • An elastic layer is provided between the first and second electrode parts, and the air gap is provided in the elastic layer.
  • the air gap is formed to pass through at least one region of the spacer and the elastic layer.
  • the air gate is formed to a length of 0.1 mm or more and 1/10 or less of the entire length of the spacer.
  • the air gate further comprises a filter for preventing the inflow of moisture or foreign matter into the air gap.
  • a touch input device includes a window; A display unit which displays an image through the window; And a pressure sensor provided below the display unit to detect a position and a pressure of a touch input, wherein the pressure sensor includes an air gap provided between the first and second electrode parts spaced apart from each other, and the first and second electrode parts. And an air gate provided at one side of the air gap to allow air to flow in and out of the air gap.
  • the touch sensor may further include a touch sensor provided between the window and the display unit.
  • a bracket provided on at least one of an upper side of the first electrode portion, between the first and second electrode portions, and a lower side of the second electrode portion.
  • At least part of any one of the first and second electrode portions is formed on the bracket.
  • the electronic device may further include a controller configured to detect a touch position according to the output of the touch sensor, and detect a touch position and pressure according to the output of the pressure sensor.
  • control unit for the touch sensor and the control unit for the pressure sensor are provided in the same IC or are provided in different ICs.
  • the control unit detects the touch pressure by detecting the capacitance of the plurality of regions between the first and second electrodes of the pressure sensor according to the touch input and comparing the capacitance of the center of the touch input with the surrounding capacitance.
  • the touch input device includes a pressure sensor in which an air gap is formed between the first and second electrode parts, and an air gate is formed to enable the inflow and outflow of air into the air gap.
  • air gate is formed, air of the air gap flows out through the air gate when an object such as a finger touches, thereby greatly changing the capacitance value of the touch portion, thereby making it easier to detect the touch area.
  • air is introduced into the air gap through the air gate, so that the air gap is quickly restored, so that it can be quickly restored to the reference capacitance value. Therefore, it is possible to accurately detect the magnitude of the touch pressure while minimizing an error in detecting the touch position with respect to the touch surface.
  • the touch input device of the present invention may further include a touch sensor to more accurately detect the touch position and pressure by driving the touch sensor and the pressure sensor in conjunction with each other. That is, the touch sensor and the pressure sensor can detect the coordinates in the horizontal direction (that is, the X direction and the Y direction) at the same time, and the pressure sensor can detect the touch position more accurately by detecting the pressure in the vertical direction (that is, the Z direction).
  • 1 to 3 are schematic views of an electronic device having a touch input device according to an embodiment of the present invention.
  • FIGS. 4 and 5 are exploded views and cross-sectional views of a touch input device having a pressure sensor according to a first embodiment of the present invention.
  • FIG 6 and 7 are schematic views of the first and second electrode portions of the pressure sensor according to the first embodiment of the present invention.
  • FIGS. 8 and 9 are exploded views and cross-sectional views of a touch input device having a pressure sensor according to a second embodiment of the present invention.
  • FIGS. 10 and 11 are exploded views and cross-sectional views of a touch input device having a pressure sensor according to a third embodiment of the present invention.
  • FIGS. 12 and 13 are exploded views and cross-sectional views of a touch input device having a pressure sensor according to a fourth embodiment of the present invention.
  • FIG. 14 and 15 are exploded views and cross-sectional views of a touch input device having a pressure sensor according to a fifth embodiment of the present invention.
  • 16 and 17 are exploded views and cross-sectional views of a touch input device having a pressure sensor according to a sixth embodiment of the present invention.
  • 18 and 19 are control configuration diagrams of a touch input device according to embodiments of the present invention.
  • FIG. 1 and 2 are a front perspective view and a rear perspective view of a mobile communication terminal as an electronic device having a touch input device according to embodiments of the present invention
  • FIG. 3 is a partial cross-sectional view taken along the line AA ′ of FIG. 1.
  • the mobile terminal 1000 includes a case 1100 forming an appearance.
  • the case 1100 may include a front case 1110, a rear case 1120, and a battery cover 1130.
  • the front case 1110 may form part of the upper side and the side of the mobile terminal 1000
  • the rear case 1120 may form part of the side surface and the bottom of the mobile terminal 1000. That is, at least a portion of the front case 1110 and at least a portion of the rear case 1120 may form a side surface of the mobile terminal 1000, and a portion of the front case 1110 may be part of the upper surface except for the display unit 1310. Can be achieved.
  • the battery cover 1130 may be provided to cover the battery 1200 provided on the rear case 1120.
  • the battery cover 1130 may be provided integrally or detachably provided. That is, when the battery 1200 is integrated, the battery cover 1130 may be integrally formed. When the battery 1200 is detachable, the battery cover 1130 may also be detachable.
  • the front case 1110 and the rear case 1120 may be integrally manufactured. That is, the case 1100 is formed to close the side and the rear surface and expose the top surface without distinguishing the front case 1110 and the rear case 1120, and the battery cover 1130 to cover the back of the case 1100. It may be arranged. At least a part of the case 1100 may be formed by injecting synthetic resin or formed of a metal material.
  • the front case 1110 and the rear case 1120 may be formed of a metal material.
  • a portion of the side surface of the mobile terminal 1000 may be formed of a metal material.
  • the battery cover 1130 may also be formed of a metal material.
  • the metal material used for the case 1100 may include, for example, stainless steel (STS), titanium (Ti), aluminum (Al), or the like.
  • various parts, such as a display unit such as a liquid crystal display, a pressure sensor, a circuit board, and a haptic device, may be embedded in the space formed between the front case 1110 and the rear case 1120.
  • the front case 1110 may include a display 1310, a sound output module 1320, a camera module 1330a, and the like.
  • a microphone 1340, an interface 1350, and the like may be disposed on side surfaces of the front case 1110 and the rear case 1120. That is, the display unit 1310, the audio output module 1320, the camera module 1330a, and the like are disposed in front of the mobile terminal 1000, and the microphone 1340 and the interface 1350 are disposed on the side of the mobile terminal 1000. And the like can be arranged.
  • the display unit 1310 occupies most of the front surface of the front case 1110. That is, the display unit 1310 is disposed in front of the mobile terminal 1000.
  • the display unit 1310 may output visual information and input tactile information of the user.
  • the display unit 1310 may be provided with a touch input device. That is, the display unit 1310 includes a window covering the front surface of the terminal body, a display unit for outputting start information, for example, a liquid crystal display device, and a touch input device including a pressure sensor for inputting user touch information. May be provided.
  • the touch input device may further include a touch sensor provided between the window and the display unit.
  • the touch sensor may be formed on a transparent plate having a predetermined thickness with a plurality of electrodes spaced apart from each other by a predetermined interval in one direction and another direction perpendicular thereto, and an insulation layer may be provided therebetween to detect a user's touch input.
  • the touch sensor may detect a capacitance according to a user's touch input by arranging a plurality of electrodes in a lattice shape.
  • the touch sensor may detect coordinates in the horizontal direction, ie, the X direction and the Y direction, which the user touches, and the pressure sensor may detect the coordinates in the vertical direction, that is, the Z direction as well as the X and Y directions. . That is, the touch sensor and the pressure sensor can simultaneously detect the coordinates in the X direction and the Y direction, and the pressure sensor can further detect the coordinates in the Z direction. In this way, the touch sensor and the pressure sensor simultaneously detect the horizontal coordinates, and the pressure sensor detects the vertical coordinates, thereby more accurately detecting the user's touch coordinates.
  • the haptic feedback device such as a piezoelectric vibration device, may be further provided in contact with the display unit 1310 to provide feedback in response to a user's input or touch.
  • the audio output module 1320 and the camera module 1330a may be disposed above the display unit 1310, and the front input unit 1360 may be disposed below the display unit 1310.
  • the front input unit 1360 may be configured as a touch key, a push key, or the like, and the front input unit 1350 may also be configured using a touch sensor or a pressure sensor. That is, the input operation of the mobile terminal 1000 may be configured to be possible using a touch sensor or a pressure sensor.
  • the power supply unit and the side input unit may be further provided on the side of the mobile terminal 1000.
  • the power supply unit and the side input unit may be provided on two opposite sides of the electronic device, or may be provided spaced apart from each other on one side.
  • the power supply unit may be used to turn on / off the electronic device, and may be used to enable or disable the screen.
  • the side input unit may be used to adjust the size of the sound output from the sound output module 1320.
  • the pressure sensor may be provided in an area other than the display unit 200. For example, pressure sensing of the upper sound output module 1320 and the camera module 1330a of the electronic device, pressure control of the lower front input unit 1360, and controlling pressure of the side power supply unit and side input unit, etc. At least one pressure sensor may be further provided.
  • a camera module 1330b may be additionally mounted on the rear of the terminal body, that is, the rear case 1120, as shown in FIG. 2.
  • the camera module 1330b has a photographing direction substantially opposite to the camera module 1330a and may be a camera having different pixels from the camera module 1330a.
  • a flash (not shown) may be further disposed adjacent to the camera module 1330b.
  • the battery 1200 may be provided between the rear case 1120 and the battery cover 1300, may be fixed, or may be detachably provided.
  • the rear case 1120 may have a concave region formed to provide an area into which the battery 1200 is inserted, and after the battery 1200 is mounted, the battery cover 1130 may cover the battery 1200 and the rear case. It may be provided to cover the 1120.
  • a bracket 1370 is provided between the display unit 1310 and the rear case 1130, and the window 100, the display unit 200, and the first electrode are disposed on the bracket 1370.
  • the pressure sensor of the present invention including the part 300, the air gap 400, the air gate 500, and the second electrode part 600 may be provided. That is, the touch input device according to the present invention may be provided above the bracket 1370 of the display unit 1310, and the bracket 1370 supports the touch input device.
  • a touch sensor may be further provided between the window 100 and the display unit 200. In this case, the bracket 1370 may be used as part of the touch input device.
  • 4 and 5 are exploded views and cross-sectional views of a touch input device having a pressure sensor according to a first embodiment of the present invention.
  • 6 and 7 are schematic views of the first and second electrodes of the pressure sensor according to the first embodiment of the present invention.
  • the touch input device includes a window 100, a display unit 200 provided below the window 100, and a display unit 200 provided below.
  • the first electrode part 300 having the first electrode 320, the air gap 400 provided under the first electrode part 300, the air gate 500 provided on one side of the air gap 400, and the air
  • the second electrode part 600 may be provided below the gap 400 and have the second electrode 620 formed therein.
  • a touch sensor (not shown) provided between the window 100 and the display unit 200 may be further included.
  • the touch input device may be provided above the bracket 1370 of the display unit 1310, and the first electrode unit 300, the air gap 400, the air gate 500, and the second electrode unit 600 may be provided.
  • a pressure sensor can be achieved.
  • the driving unit is configured to apply driving power to the first electrode unit 300, and a signal including information on capacitance changes according to a touch on a touch surface of the touch input device is received.
  • the apparatus may further include a controller including a detector configured to detect a touch position and a touch pressure on the touch surface.
  • the window 100 is provided above the display unit 200 and contacts an object such as a finger or a stylus pen.
  • the window 100 may be made of a transparent material, for example, may be made of acrylic resin, glass, or the like.
  • the display unit 200 displays an image to the user through the window 100.
  • the display unit 200 may include a liquid crystal display (LCD) panel, an organic light emitting display (OLED) panel, and the like.
  • a backlight unit (not shown) may be provided below the display unit 200.
  • the backlight unit may include a reflective sheet, a light guide plate, an optical sheet, and a light source.
  • the light source may be a light emitting diode (LED). In this case, the light source may be provided below the optical structure on which the reflective sheet, the light guide plate, and the optical sheet are stacked, or may be provided on the side surface.
  • the liquid crystal material of the liquid crystal display panel outputs a character or an image according to an input signal in response to the light source of the backlight unit.
  • a light blocking tape (not shown) is attached between the display unit 200 and the backlight unit to block light leakage.
  • the light blocking tape may be formed in a form in which an adhesive is applied to both sides of the polyethylene film. The display unit 200 and the backlight unit are adhered to the adhesive of the light blocking tape, and the light of the backlight unit does not leak to the outside of the display unit 200 by the polyethylene film inserted into the light blocking tape.
  • the first electrode 300 may be formed by forming a conductive layer having a predetermined pattern on a predetermined plate.
  • the first electrode part 300 may include a first support layer 310 and a first electrode 320 formed on the first support layer 310.
  • the first support layer 310 supports the first electrode 320 so that the first electrode 320 is formed on one surface thereof, and for this purpose, the first support layer 310 may be provided in a plate shape having a predetermined thickness.
  • the first support layer 310 may be provided in the form of a film having flexible properties to have elasticity and restoring force.
  • the first support layer 310 may be a liquid polymer such as silicon, urethane, polyurethane, or the like.
  • the first support layer 310 may be formed using a prepolymer using a liquid photocurable monomer, an oligomer, a photoinitiate, and additives. Meanwhile, the first support layer 310 may be transparent or opaque in some cases. As illustrated in FIG. 6, the first electrode 320 may be formed in a predetermined width and spaced apart from each other in one direction by a plurality of first electrodes, and as shown in FIG. 7. It may be formed in plural in a substantially rectangular pattern having an interval. In this case, the second electrode 620 facing the first electrode 320 may be arranged in a direction orthogonal to the first electrode 320 and spaced apart from each other as shown in FIG. 6. It may be formed as a whole.
  • the first electrode 320 may be entirely formed on the first support layer 310, whereas the plurality of second electrodes 620 may be formed in a substantially rectangular pattern having a predetermined width and spacing.
  • the first electrode 320 may be formed at an edge of the lower side of the display unit 200. That is, the first electrode 320 may be formed to be spaced apart from each other near four corner regions below the display unit 200.
  • the first electrode 320 may be formed of a transparent conductive material such as indium tin oxide (ITO) or antimony tin oxide (ATO).
  • ITO indium tin oxide
  • ATO antimony tin oxide
  • the first electrode 320 may be formed of a transparent conductive material other than such a material, or may be formed of an opaque conductive material such as copper, gold, or silver.
  • the first electrode 320 may be formed to a thickness of 0.1 ⁇ m to 50 ⁇ m, and may be formed at an interval of 1 ⁇ m to 10000 ⁇ m. In addition, when the first electrode 320 is provided to be spaced apart from each other near the lower edge of the display unit 200, the interval therebetween may be 10000 ⁇ m or more.
  • the first electrode part 300 adjusts the distance to the second electrode part 600 by touching or pressing an object and thus changes the capacitance.
  • the first electrode part 300 may be provided between the display part 200 and the backlight unit.
  • the first electrode 300 is preferably formed of a transparent conductive material.
  • the air gap 400 and the second electrode 600 may be provided between the display unit 200 and the backlight unit as well as the first electrode 300. That is, the first electrode 320, the air gap 400, and the second electrode 620 may be provided on the backlight unit.
  • the compressible layer is also preferably disposed on the transparent or unobstructed side.
  • the air gap 400 may be provided between the first electrode part 300 and the second electrode part 600. That is, the spacer 410 is provided at the edge between the first electrode part 300 and the second electrode part 600, so that the air gap 400 is between the first electrode part 300 and the second electrode part 600. This can be arranged. In other words, the air gap 400 may be provided inside the spacer 410 between the first electrode part 300 and the second electrode part 6000. In addition, at least one spacer 410 may be provided not only at the edge between the first and second electrode parts 300 and 600 but also inside thereof. That is, the spacer 410 may be provided along the edge between the first and second electrode parts 300 and 600 and at least one inside thereof.
  • At least one spacer 410 may be provided inside, for example, a straight line, in an area provided along an edge, or at least one spacer may be provided in a direction orthogonal thereto.
  • the spacer 410 may be provided in at least one closed loop shape to seal the gap between the spacer 410 and the first and second electrode parts 300 and 600. That is, the spacer 410 may be provided in a first closed loop shape along edges between the first and second electrode parts 300 and 600, and further provided in at least one second closed loop shape.
  • the spacer 410 may be provided to be spaced apart from each other in a plurality of areas between the first and second electrode parts 300 and 600.
  • the spacer 410 may be formed using a material having elasticity and restoring force.
  • the spacer 410 may be formed using silicone, rubber, double-sided tape, gel, teflon tape, and urethane having a hardness of 30 or less.
  • the spacer 410 may be formed using a spring.
  • the spacer 410 may be bonded to the upper and lower portions by an adhesive layer.
  • the spacer 410 may be made of silicon, and adhesives such as double-sided tapes may be provided on the upper and lower surfaces thereof so that the spacer 410 may be attached to the first electrode part 300 and the second electrode part 600.
  • the spacer 410 may be formed of only a double-sided adhesive tape. That is, a double-sided tape may be provided at an edge between the first electrode portion 300 and the second electrode portion 600 to bond the first electrode portion 300 and the second electrode portion 600 with the double-sided tape.
  • the spacer 410 may be bonded to the elastic body by using the double-sided tape, or by using only the double-sided tape according to the height of the air gap 400.
  • a plurality of air gaps 400 may be provided between the first electrode part 300 and the second electrode part 600. That is, a plurality of spacers 410 are provided between the first electrode part 300 and the second electrode part 600 in one direction and the other direction orthogonal thereto, for example, to bond the plurality of spacers 410 to each other. 400 may be provided. In this case, the plurality of air gaps 400 may be formed in an area where the plurality of first electrodes 320 of the first electrode part 300 and the plurality of second electrodes 620 of the second electrode part 600 cross each other. Can be.
  • the air gate 500 may be provided at one side of the air gap 400.
  • the air gate 500 may be formed in at least a portion of the spacer 410. That is, the air gate 500 may be formed on at least a portion of the spacer 410 formed along the edges of the first and second electrode parts 300 and 600.
  • the air gate 500 may be formed on at least a portion of the inner spacer 410.
  • each of the spacers 410 may be provided with at least one air gate 500, and when the spacers 410 are spaced apart from each other by a predetermined interval,
  • the air gate 500 may be formed to penetrate the side surface of the spacer 410.
  • an incision region may be formed in at least a portion of the spacer 410, or an opening may be formed in at least a portion of the spacer 410 to form an air gate 500.
  • the incision region means that a predetermined region of the spacer 410 is removed so that the spacer 410 does not remain in a predetermined region between the first electrode portion 300 and the second electrode portion 600, and the opening represents the first electrode.
  • the spacer 410 remains in a predetermined region between the unit 300 and the second electrode unit 600. That is, the incision region is formed by spaced apart from one end and the other end of the spacer 410 by a predetermined interval, or the spacer 410 is removed in a vertical direction between the first electrode part 300 and the second electrode part 600. As a result, no spacer 410 remains in the cutout region.
  • the opening is formed in a predetermined region of the spacer 410, and a portion of the spacer 410 remains between the first electrode part 300 and the second electrode part 600 on the upper side and the lower side of the opening. Air may flow into the air gap 400 through the air gate 500, or the air of the air gap 400 may flow out.
  • one air gate 500 may be formed or a plurality of air gates 500 may be formed.
  • the air gate 500 is formed as described above, when the object touches, the air of the air gap 400 escapes through the air gate 500, so that the touch pressure can be more clearly detected, and the air gap 400 when the touch is terminated. Air is introduced into the air gap 400 may be quickly restored. Thus, the pressure can be transmitted accurately to accurately detect the small to large forces of pressure. That is, the air gap 400 may be further compressed because the air of the air gap 400 exits through the air gate 500 when the object touches the first and second electrode parts 300 and 600. ) May be closer between the first and second electrodes 320 and 620.
  • the capacitances of the first and second electrodes 320 and 620 may be greatly changed, thereby detecting the pressure as well as the touch position.
  • the method for detecting the pressure from the pressure sensor will be described in detail later in the description of the control unit, for example, by detecting the capacitance of the plurality of areas between the first and second electrodes 320 and 620, the center of the touch input and its The touch pressure can be detected by comparing the surrounding capacitance.
  • the air gate 500 may be formed to a length of less than 1/10 of the full length of the spacer 410 0.1mm or more.
  • the air gate 500 When the air gate 500 is formed to a length of less than 0.1mm, the inflow and outflow effect of the air is insignificant, so the air inflow and outflow time is long, and the time for responding to the user's touch is delayed.
  • the spacer 410 when the spacer 410 is formed to have a length exceeding 1/10 of the entire length, fine dust or moisture may flow into the air gap 400.
  • the air gate 500 may be provided with a filter (not shown) to prevent inflow of fine dust or moisture into the air gap 400. That is, by forming the filter, air may flow in or out of the air gap 400, and the penetration of fine dust or water into the air gap 400 may be prevented.
  • the second electrode part 600 may be formed by forming a conductive layer having a predetermined pattern on a predetermined plate.
  • the second electrode unit 600 may include a second support layer 610 and a second electrode 620 formed on the second support layer 610.
  • the second support layer 610 supports the second electrode 620 so that the second electrode 620 is formed on one surface thereof.
  • the second support layer 610 may be provided in a plate shape having a predetermined thickness.
  • the second support layer 610 may have elasticity and restoring force similarly to the first support layer 310.
  • the second support layer 610 may not have elasticity and restoring force.
  • the second support layer 610 may have a rigid characteristic.
  • the second support layer 610 may be transparent or opaque in some cases.
  • the second electrode 620 may be spaced apart from each other by a predetermined interval and may be arranged in a direction orthogonal to the first electrode 320.
  • the second electrode 620 may be formed as a whole as illustrated in FIG. 7.
  • the first electrode 320 may be entirely formed on the first support layer 310, whereas the plurality of second electrodes 620 may be formed in a substantially rectangular pattern having a predetermined width and spacing.
  • the second electrode 620 may be formed at an edge of the lower side of the display unit 200. That is, the second electrode 620 may be formed to be spaced apart from each other near four corner regions below the display unit 200, and may be formed to face the first electrode 320.
  • the first and second electrodes 320 and 620 may be opposed to regions other than the display unit 200 so that a pressure sensor may be provided outside the display unit 200. For example, pressure sensing of the upper sound output module 1320 and the camera module 1330a of the electronic device, pressure control of the lower front input unit 1360, and controlling pressure of the side power supply unit and side input unit, etc. At least one pressure sensor may be provided.
  • the second electrode 620 may be formed of a transparent conductive material such as indium tin oxide (ITO) or antimony tin oxide (ATO).
  • the second electrode 620 may be formed of a transparent conductive material other than such a material, or may be formed of an opaque conductive material such as copper, silver, and gold.
  • the second electrode 620 may be formed to a thickness of 0.1 ⁇ m to 50 ⁇ m, and may be formed at an interval of 1 ⁇ m to 10000 ⁇ m.
  • the second electrodes 620 are provided to be spaced apart from each other near the lower edge of the display unit 200, the interval therebetween may be 10000 ⁇ m or more.
  • the ground electrode may be applied to the second electrode unit 600 through the second electrode 620.
  • a signal having a predetermined potential may be applied through the first electrode part 300, and a ground potential may be applied through the second electrode part 600.
  • the first electrode part 300 is elastically deformed by touching or pressing an object with respect to the second electrode part 600 so that the distance between the first and second electrode parts 300 and 500 is adjusted and accordingly the electrostatic Dosage may vary.
  • the air gap 400 and the second electrode unit 600 may be provided between the display unit 200 and the backlight unit as well as the first electrode unit 300. That is, the first electrode 320, the air gap 400, and the second electrode 620 may be provided on the backlight unit.
  • the driving unit may apply a driving signal to the first electrode 300.
  • the driving signal may be sequentially applied to the plurality of first electrodes 310 formed to be spaced apart at predetermined intervals in one direction.
  • This drive signal may be applied repeatedly. That is, a driving signal may be sequentially applied from the first electrode 310 formed at one edge to the first electrode 310 formed at the other edge away from the first electrode 310.
  • the driving signal may be simultaneously applied to the plurality of first electrodes 310.
  • the detector (not shown) may detect the amount of change in capacitance by receiving a signal including information on the capacitance through the first electrode 300 or the second electrode 600.
  • the detector may detect whether the touch input device is touched and the touch position. For example, it is possible to detect whether and / or a position of the touch on the touch input device in a two-dimensional plane formed in one direction and another direction perpendicular thereto.
  • the touch sensor 150 may be provided between the window 100 and the display unit 200.
  • the touch sensor 150 may be formed on a transparent plate having a predetermined thickness with a plurality of electrodes spaced apart at predetermined intervals in one direction and another direction perpendicular thereto, and an insulation layer may be provided therebetween to detect a user's touch input. That is, the touch sensor 150 may be arranged in a lattice shape to detect the capacitance according to the user's touch input. Accordingly, the touch sensor 150 may detect coordinates in a horizontal direction that the user touches, that is, an X direction and a Y direction orthogonal to each other.
  • the electrode of the touch sensor 150 may be formed as shown in FIGS. 6 and 7. That is, the touch sensor 150 may be formed in the shape of the first and second electrodes 320 and 620 of the first and second electrode parts 300 and 600 of the pressure sensor.
  • any one of the first and second electrode parts 300 and 600 of the present invention may be implemented on the bracket 1370. That is, the bracket 1370 may function as the first and second electrode parts 300 and 600. In this case, the first electrode 320 or the second electrode 620 may be formed on the bracket 1370. Therefore, the bracket 1370 may be used as the support layer of the first electrode part 300 or the second electrode part 600.
  • 10 and 11 are exploded views and cross-sectional views of a touch input device having a pressure sensor according to a third embodiment of the present invention. 10 and 11 illustrate a case where the second electrode 620 is formed on the bracket 1370. In this case, although not shown, a touch sensor may be further provided between the window 100 and the display unit 200.
  • the bracket 1370 is provided above the rear case 1120 as shown in FIG. 3.
  • the bracket 1370 supports the upper touch sensor, the display unit 200, the first electrode unit 300, and the spacer 410 so that the pressing force of the object is not distributed.
  • the bracket 1370 may be formed of a material whose shape is not deformed. That is, the bracket 1370 does not distribute the pressing force of the object, and supports the touch sensor, the display unit 200, the first electrode unit 300, and the spacer 410, so that the shape is not deformed by pressure. Can be formed.
  • the bracket 1370 may be formed of a conductive material or an insulating material.
  • the bracket 1370 may be formed in a corner or whole bent structure, that is, bent structure.
  • the bracket 1370 As the bracket 1370 is provided, the pressing force of the object may be concentrated without being distributed, and thus the touch area may be detected more accurately.
  • the bracket 1370 may be used as the second electrode part. That is, the bracket 1370 may be used as a ground electrode whose capacitance changes with the potential of the first electrode unit 300.
  • the bracket 1370 may be formed of an insulating material and the second electrode 620 may be formed on the bracket 1370 so that the bracket 1370 may be used as the second electrode portion, that is, the ground electrode.
  • the second electrode 620 may be arranged in one direction to have a predetermined width and interval, and may be arranged in a direction orthogonal to the first electrode 320.
  • the second electrode 620 may be entirely formed on the bracket 1370 as shown in FIG. 7.
  • the second electrode 620 may be formed in a lattice shape. That is, a plurality of second electrodes 620 may be formed on the bracket 1370 to extend in one direction and the other direction perpendicular to the bracket 1370.
  • the second electrode 620 on the bracket 1370 is formed to at least partially overlap the first electrode 320 of the first electrode part 300. That is, the first and second electrodes 320 and 520 may overlap each other so that the capacitance changes according to a change in the distance between the first electrode 320 and the second electrode 620.
  • the second electrode 620 formed on the bracket 1370 may be formed of a transparent conductive material.
  • the second electrode 620 may be formed of an opaque conductive material such as copper, silver, and gold.
  • the bracket 1370 may be applied with a ground potential through the second electrode 620. That is, a signal having a predetermined potential may be applied through the first electrode unit 300, and a ground potential may be applied through the bracket 1370. Accordingly, the distance between the first electrode 300 and the bracket 1370 is closer to the reference distance according to the touch of the object, and thus the capacitance between the first electrode 300 and the bracket 1370 may be changed. Can be.
  • the second electrode part 600 may be provided below the bracket 1370. That is, as illustrated in FIGS. 12 and 13, the touch input device including the pressure sensor according to the fourth embodiment of the present invention may include a window 100, a display unit 200, a first electrode unit 300, and an air gap. 400, an air gate 500, a bracket 1370, and a second electrode part 600 may be included. In addition, although not shown, a touch sensor may be further provided between the window 100 and the display unit 200.
  • the second electrode part 600 may be provided below the bracket 1370.
  • the second electrode part 600 may be provided below the bracket 1370 to apply a ground potential to the second electrode 620 when the second electrode 620 is formed on the bracket 1370 and used as the ground electrode. Can be.
  • the second electrode part 600 may function as a ground electrode when the second electrode 620 is not formed on the bracket 1370.
  • the second electrode part 600 may be formed by forming a second electrode 620 having a predetermined pattern on the support layer 610 having a predetermined plate shape.
  • the second electrode part 600 may be provided below the bracket 1370, and the second electrode part 600 may have a ground potential at the electrode when the electrode is formed on the bracket 1370 and used as the ground electrode. It may be provided to apply a, it may form a pressure sensor together with the first electrode 300, the air gap 400 and the air gate 500 with the bracket 1370 therebetween.
  • the embodiments of the present invention include the first electrode 300, the air gap 400, the air gate 500, and the second electrode 600 disposed between the display unit 200 and the bracket 1370.
  • the first electrode part 300, the air gap 400, the air gate 500, and the second electrode part 600 may be provided between the window 100 and the display part 200, and the display part 200.
  • a backlight unit In this case, the backlight unit may be provided between the display unit 200 and the bracket 1370.
  • an air gap 400 is formed between the first and second electrode parts 300 and 600, and air inflow and outflow of the air gap 400 is performed.
  • An air gate 500 is formed to enable this.
  • the air gate 500 is formed, when an object such as a finger touches, the air of the air gap 400 flows out through the air gate 500, so that the capacitance value of the touch portion is greatly changed, thereby facilitating the touch area. Can be detected.
  • air is introduced into the air gap 400 through the air gate 500 so that the air gap 400 is quickly restored, so that the air capacitance 400 may be quickly restored to the reference capacitance value. Therefore, by applying such a pressure sensor to the touch input device, it is possible to accurately detect the magnitude of the touch pressure while minimizing an error in detecting the touch position on the touch surface.
  • FIG. 14 and 15 are exploded views and cross-sectional views of a touch input device having a pressure sensor according to a fifth embodiment of the present invention.
  • a touch input device may include a window 100, a display unit 200 provided below the window 100, and a second unit provided below the display unit 200.
  • a bracket 1370 may be provided below the first electrode 300, and although not shown, a touch sensor may be further provided between the window 100 and the display 200.
  • the bracket 1370 does not form a predetermined electrode used as the ground electrode and serves to prevent the pressing force of the object from being distributed to other parts.
  • the buffer layer 700 is provided between the second electrode part 600 used as the ground electrode and the elastic layer 800.
  • the buffer layer 700 may be formed of an insulating material such as PI or PET.
  • the elastic layer 800 is provided between the buffer layer 700 and the first electrode portion 300, and may be formed of an elastic material having elastic restoring force such as silicone, rubber, double-sided tape, gel, poron tape, urethane, and spring. have. In this case, the elastic body may use a material having a hardness of 30 or less.
  • a plurality of air gaps 400 are formed in the elastic layer 800.
  • the air gap 400 may be provided to be spaced apart from each other by a plurality of having the same size. At this time, the size and the separation distance of the air gap 400 may be the same, the size may be larger than the separation distance.
  • one or more air gaps 400 may be formed in an area where the first electrode 320 of the first electrode part 300 and the second electrode 620 of the second electrode part 600 intersect with each other.
  • the plurality of air gaps 400 may be formed in contact with the first electrode part 300, or may be formed in contact with the buffer layer 700.
  • the plurality of air gaps 400 may be formed in the elastic layer 800 to be spaced apart without being in contact with the first electrode 300 or the buffer layer 700. Meanwhile, air may flow into or out of the plurality of air gaps 400. That is, an air gate (not shown) is formed in a predetermined region of the elastic insulating layer 800 so that air may flow in or out of the plurality of air gaps 400.
  • the air gate may be formed in the elastic layer 800 between the first electrode part 300 and the plurality of air gaps 400 when the plurality of air gaps 400 are formed adjacent to the first electrode part 300. Can be formed.
  • the structure including the buffer layer 700 and the elastic layer 800 may be implemented by changing the position of each component.
  • the window 100, the display unit 200, the first electrode unit 300, the elastic layer 800 having the air gap 400, the buffer layer 700, the bracket 1370, and the second electrode unit ( 600 may be stacked to implement a touch input device.
  • the buffer layer 700 may not be provided and a touch input device may be implemented.
  • 16 and 17 are exploded perspective views and cross-sectional views of a touch input device including a pressure sensor according to a sixth embodiment of the present invention.
  • the touch input device includes a window 100, a display unit 200 provided below the window 100, and a first unit provided below the display unit 200.
  • a touch sensor may be further provided between the window 100 and the display unit 200.
  • the bracket 1370 may function as a second electrode portion in which a second electrode is formed to apply a ground potential. That is, in the fifth embodiment of the present invention, the second electrode part 600 and the insulating layer 700 are not provided as compared with the fourth embodiment of the present invention.
  • the plurality of air gaps 400 may be formed in contact with the first electrode part 300, or may be formed in contact with the buffer layer 700. In addition, as illustrated in FIG. 17, the plurality of air gaps 400 may be spaced apart from the first electrode portion 300 or the buffer layer 700 without being in contact with the first electrode portion 300 or the buffer layer 700.
  • FIG. 18 is a control block diagram of a touch input device according to an embodiment of the present disclosure, and is a control block diagram of a touch input device including a touch sensor and a pressure sensor.
  • a control configuration of a touch input device may include a controller 900 that controls driving of the touch sensor 10 and the pressure sensor 20.
  • the controller 900 may include a driver 910, a detector 920, a converter 930, and a calculator 940.
  • the controller 900 including the driver 910, the detector 920, the converter 930, and the calculator 940 may be implemented as one integrated circuit (IC). Therefore, the output of the touch sensor 10 and the pressure sensor 20 can be processed simultaneously using one integrated circuit (IC).
  • the driver 910 applies a driving signal to the touch sensor 10 and the pressure sensor 20.
  • the driving unit 910 may include a first driving unit for driving the touch sensor 10 and a second driving unit for driving the pressure sensor 20. That is, the driving unit 910 may apply driving signals to the touch sensor 10 and the pressure sensor 20, respectively.
  • the driving unit 910 may be configured as one to apply a driving signal to the touch sensor 10 and the pressure sensor 20. That is, one driver 910 may apply driving signals to the touch sensor 10 and the pressure sensor 20, respectively.
  • the driving signal from the driving unit 910 may be applied to any one of the first and second electrodes constituting the touch sensor 10 and the pressure sensor 20.
  • a predetermined driving signal is applied to, for example, the first electrode of the first and second electrodes of the touch sensor 10 formed to intersect in one direction and the other direction, and predetermined to the first electrode of the pressure sensor 20.
  • the driving signals applied to the touch sensor 10 and the pressure sensor 20 may be identical to each other or may be different from each other.
  • the driving signal may be a square wave, a sine wave, a triangle wave, or the like having a predetermined period and amplitude, and may be sequentially applied to each of the plurality of first electrodes.
  • the driver 910 may simultaneously apply a driving signal to the plurality of first electrodes or selectively apply a driving signal to only a part of the plurality of first electrodes.
  • the detector 920 detects an output signal of the touch sensor 10 and an output signal of the pressure sensor 20. That is, the detector 920 detects capacitance from the plurality of second electrodes of the touch sensor 10, and detects capacitance from the plurality of second electrodes of the pressure sensor 20.
  • the detector 920 detects capacitance from the plurality of second electrodes of the touch sensor 10, and detects capacitance from the plurality of second electrodes of the pressure sensor 20.
  • the detector 920 detects a change in capacitance between the first and second electrodes of the touch sensor 10 and the pressure sensor 20 to detect the touch input.
  • the detector 920 may include a first detector for detecting the capacitance of the touch sensor 10 and a second detector for detecting the capacitance of the pressure sensor 20.
  • one detection unit 920 may detect both the capacitances of the touch sensor 10 and the pressure sensor 20, and for this purpose, the detection unit 920 may detect the power failure of the touch sensor 10 and the pressure sensor 20. Doses can be detected sequentially.
  • the detector 920 may detect the pressure of the user's touch input using the pressure sensor 20.
  • the detector 920 may detect an area of the touch sensor by detecting the capacitance of the touch sensor 10, and detect an area of the touch sensor and the pressure of the area by detecting the capacitance of the pressure sensor 20.
  • the detector 920 may detect an area of the touch sensor by detecting the capacitance of the touch sensor 10, and detect an area of the touch sensor and the pressure of the area by detecting the capacitance of the pressure sensor 20.
  • there may be a center region where the center of the finger is in contact so that the pressure is most transmitted, and a peripheral region where less pressure is transmitted around the center region.
  • the touch pressure of the user is transmitted the greatest, and thus the distance between the first and second electrodes is close, and the peripheral region is farther between the first and second electrodes than the center region, so that the capacitance of the center region is increased. Is larger than the surrounding area.
  • the detector 920 may include a plurality of CV converters (not shown) each having at least one operational amplifier and at least one capacitor, and the plurality of CV converters may include a touch sensor 10 and a pressure sensor ( And a plurality of second electrodes of 20).
  • the plurality of C-V converters may output an analog signal by changing the capacitance into a voltage signal.
  • each of the plurality of C-V converters may include an integrating circuit for integrating the capacitance.
  • the integrating circuit may integrate the capacitance and change the output to a predetermined voltage.
  • the CV converter may be provided with the number of the plurality of second electrodes. Can be.
  • the converter 930 converts the analog signal output from the detector 920 into a digital signal to generate a detection signal. For example, the converter 930 measures a time at which the analog signal output from the detector 920 reaches a predetermined reference voltage level in a voltage form, and converts the time into a detection signal that is a digital signal.
  • a digital converter circuit or an analog-to-digital converter (ADC) circuit for measuring an amount of change in the level of the analog signal output from the detector 920 for a predetermined time and converting it into a detection signal which is a digital signal may be included. .
  • the calculator 940 determines the contact input applied to the touch sensor 10 and the pressure sensor 20 using the detection signal.
  • the number, coordinates, etc. of the touch inputs applied to the touch sensor 10 and the pressure sensor 20 may be determined using the detection signal.
  • the pressure of the touch input may be determined using the detection signal.
  • the detection signal based on the operation unit 940 for determining the touch input may be data obtained by quantifying the change in capacitance. In particular, data indicating the difference between the capacitance when the touch input does not occur and when the touch input occurs. Can be.
  • the touch input of the touch sensor 10 and the pressure sensor 20 may be determined using the controller 900, and the touch input may be transmitted to, for example, the main controller of the host 30 such as an electronic device. That is, the controller 900 generates X and Y coordinate data by using the signal input from the touch sensor 10 using the detector 920, the converter 930, the calculator 940, and the like. X, Y coordinate data and Z pressure data are generated using the signal input from 20). The generated X, Y coordinate data and Z pressure data are transmitted to the host 30, and the host 30 uses the main controller to touch the corresponding parts using the X, Y coordinate data and the Z pressure data, for example. And pressure.
  • the controller 900 may include a first controller 900a that processes the output of the touch sensor 10 and a second controller 900b that processes the output of the pressure sensor 20. That is, although FIG. 16 has described one control unit 900 for processing the outputs of the touch sensor 10 and the pressure sensor 20, the control unit 900 has the touch sensor 10 and the pressure as shown in FIG. It may include a first and second control unit (900a, 900b) for processing the output of the sensor 20, respectively.
  • the first controller 900a may include a first driver 910a, a first detector 920a, a first converter 930a, and a first calculator 940a
  • the second controller 900b may include The second driver 910b, the second detector 920b, the second converter 930b, and the second calculator 940b may be included.
  • the first and second controllers 900a and 900b may be implemented in different integrated circuits IC, respectively. Thus, two integrated circuits may be needed to process the output of the touch sensor 10 and the pressure sensor 20.
  • the first and second controllers 900a and 900b may be implemented in one integrated circuit IC, respectively. Configurations and functions of the first and second controllers 900a and 900b are the same as those described above with reference to FIG. 16 by separately processing the outputs of the touch sensor 10 and the pressure sensor 20, and thus, detailed descriptions thereof will be omitted. do.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

La présente invention concerne un dispositif d'entrée tactile comprenant : des première et seconde unités électrodes espacées l'une de l'autre ; un entrefer formé entre les première et seconde unités électrodes ; et un orifice d'échappement situé sur un côté de l'entrefer et permettant à l'air d'entrer dans l'entrefer et d'en sortir.
PCT/KR2016/011798 2015-10-26 2016-10-20 Capteur de pression et dispositif d'entrée tactile comprenant ce capteur WO2017073949A1 (fr)

Priority Applications (1)

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US15/771,279 US20180307361A1 (en) 2015-10-26 2016-10-20 Pressure sensor and touch input device comprising same

Applications Claiming Priority (4)

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KR20150148839 2015-10-26
KR10-2015-0148839 2015-10-26
KR1020160129997A KR101920014B1 (ko) 2015-10-26 2016-10-07 압력 센서 및 이를 구비하는 터치 입력 장치
KR10-2016-0129997 2016-10-07

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KR101452748B1 (ko) * 2013-04-24 2014-10-23 한국표준과학연구원 멀티터치에 따른 접촉위치 및 접촉 힘을 감지하는 센서 및 그 제조방법
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US20130032861A1 (en) * 2011-08-03 2013-02-07 Pantech Co., Ltd. Touch panel and method for manufacturing the same
KR101452748B1 (ko) * 2013-04-24 2014-10-23 한국표준과학연구원 멀티터치에 따른 접촉위치 및 접촉 힘을 감지하는 센서 및 그 제조방법
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KR20150117958A (ko) * 2014-04-11 2015-10-21 엘지전자 주식회사 이동 단말기 및 이의 제어방법

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108415632A (zh) * 2018-03-15 2018-08-17 京东方科技集团股份有限公司 触控面板及触控按钮
CN108415632B (zh) * 2018-03-15 2021-08-27 京东方科技集团股份有限公司 触控面板及触控按钮

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