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WO2018151510A1 - Dispositif de détection de pression, détecteur de pression, et appareil comprenant ceux-ci - Google Patents

Dispositif de détection de pression, détecteur de pression, et appareil comprenant ceux-ci Download PDF

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Publication number
WO2018151510A1
WO2018151510A1 PCT/KR2018/001899 KR2018001899W WO2018151510A1 WO 2018151510 A1 WO2018151510 A1 WO 2018151510A1 KR 2018001899 W KR2018001899 W KR 2018001899W WO 2018151510 A1 WO2018151510 A1 WO 2018151510A1
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WO
WIPO (PCT)
Prior art keywords
electrode
impedance
reference potential
potential layer
magnitude
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2018/001899
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English (en)
Korean (ko)
Inventor
김본기
김종식
김세엽
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hideep Inc
Original Assignee
Hideep Inc
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Filing date
Publication date
Application filed by Hideep Inc filed Critical Hideep Inc
Publication of WO2018151510A1 publication Critical patent/WO2018151510A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
    • G01L1/142—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators using capacitors
    • G01L1/144—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators using capacitors with associated circuitry
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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 OR CALCULATING; 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
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes

Definitions

  • the present invention relates to a pressure sensing device, a pressure detector and a device comprising the same. More specifically, the present invention relates to a pressure sensing device, a pressure detector, and a device including the improved sensitivity characteristics for pressure sensing.
  • input devices are used for the operation of the computing system.
  • input devices such as buttons, keys, joysticks, and touch screens are used. Due to the easy and simple operation of the touch screen, the use of the touch screen is increasing in the operation of the computing system.
  • the touch screen can include a touch sensor panel, which can be a transparent panel with a touch-sensitive surface. Such a touch sensor panel may be attached to the front of the display screen such that the touch-sensitive surface covers the visible side of the display screen.
  • the touch screen allows a user to manipulate the computing system by simply touching the display screen with a finger or the like. In general, the touch screen recognizes the contact and the contact location on the display screen and the computing system can interpret the contact and perform the calculation accordingly.
  • the pressure sensor may be manufactured separately from the applied touch input device and the like, but the pressure detection circuit needs to be modified for each application applied for uniform pressure magnitude detection. This is because the distance between the pressure electrode and the reference potential layer varies depending on the application. Accordingly, there is a need for a pressure detection technique that enables simple detection of pressure magnitude without needing to be modified regardless of the application being applied.
  • a pressure sensing device includes an electrode, a driving unit for applying a driving signal to the electrode, and a capacitance between the electrode and the reference potential layer, which varies according to a relative distance between the electrode and a reference potential layer spaced from the electrode. And a sensing unit for receiving a received signal from the output terminal of the electrode, the first impedance defined between the driver and the electrode, and a second impedance defined between the electrode and the reference potential layer.
  • the magnitude of the first impedance and the magnitude of the second impedance may be substantially the same.
  • a pressure sensing device includes an electrode, a driving unit for applying a driving signal to the electrode, and a capacitance between the electrode and the reference potential layer, which varies according to a relative distance between the electrode and a reference potential layer spaced from the electrode. And a sensing unit for receiving a received signal from the output terminal of the electrode, the first impedance defined between the driver and the electrode, and a second impedance defined between the electrode and the reference potential layer.
  • the magnitude of the first impedance may be in a range of 0.3 times the magnitude of the second impedance to 3.3 times the magnitude of the second impedance.
  • the detector may include an analog-to-digital converter (ADC) directly connected to the output terminal of the electrode.
  • ADC analog-to-digital converter
  • the sensing unit may include an amplifier and a feedback capacitor connected between the negative input terminal and the output terminal of the amplifier.
  • the sensing unit may include an analog-to-digital converter (ADC), a buffer circuit connected between the analog-to-digital converter (ADC) and an output terminal of the electrode.
  • ADC analog-to-digital converter
  • the first impedance and the second impedance may be a capacitive load.
  • the first impedance and the second impedance may be a resistive load.
  • the first impedance and the second impedance may be an inductive load.
  • the reference potential layer may be a ground potential layer.
  • the reference potential layer may be configured to be included.
  • the pressure detector includes a driving unit for applying a driving signal to an electrode, and an electrostatic force between the electrode and the reference potential layer that is changed according to a relative distance between the reference potential layer and the electrode spaced apart from the electrode through the electrode. And a sensing unit configured to receive a received signal including information on capacitance, wherein the driving signal is applied to the electrode after passing a first impedance defined between the driving unit and the electrode, and the electrode and the reference potential layer.
  • a second impedance is defined in between, and the magnitude of the first impedance and the magnitude of the second impedance may be substantially the same.
  • the pressure detector includes a driving unit for applying a driving signal to an electrode, and an electrostatic force between the electrode and the reference potential layer that is changed according to a relative distance between the reference potential layer and the electrode spaced apart from the electrode through the electrode. And a sensing unit configured to receive a received signal including information on capacitance, wherein the driving signal is applied to the electrode after passing a first impedance defined between the driving unit and the electrode, and the electrode and the reference potential layer. Between the second impedance is defined, the magnitude of the first impedance may be in the range of 0.3 times the magnitude of the second impedance to 3.3 times the magnitude of the second impedance.
  • the detector may include an analog-to-digital converter (ADC) directly connected to the output terminal of the electrode.
  • ADC analog-to-digital converter
  • the sensing unit may include an amplifier and a feedback capacitor connected between the negative input terminal and the output terminal of the amplifier.
  • the sensing unit may include an analog-to-digital converter (ADC), a buffer circuit connected between the analog-to-digital converter (ADC) and an output terminal of the electrode.
  • ADC analog-to-digital converter
  • the first impedance and the second impedance may be a capacitive load.
  • the first impedance and the second impedance may be a resistive load.
  • the first impedance and the second impedance may be an inductive load.
  • the reference potential layer may be a ground potential layer.
  • the reference potential layer may be configured to be included.
  • a pressure sensing device a pressure detector, and a device including the same, which have improved sensitivity characteristics for pressure sensing.
  • the technical idea of the present invention can provide a pressure sensing device and a pressure detector that can easily detect the pressure magnitude without circuit modification, regardless of the application applied.
  • FIG. 1 is a block diagram of a pressure sensing device according to an embodiment of the present invention.
  • FIG. 2 illustrates a cross section of a device to which a pressure sensing device according to an embodiment of the present invention is applied.
  • FIG. 3 is a diagram illustrating an equivalent circuit of the pressure sensing device according to the first embodiment.
  • 4 and 5 are graphs for demonstrating a range of k values capable of improving sensitivity characteristics in the pressure sensing device according to the first embodiment.
  • FIG. 6 is a view showing an equivalent circuit of the pressure sensing device according to the second embodiment.
  • FIG. 7 is a diagram illustrating an equivalent circuit of the pressure sensing device according to the third embodiment.
  • FIG. 8 is a diagram illustrating a configuration of the amplifier circuit of FIG. 7.
  • FIG. 1 is a block diagram of a pressure sensing device 100 according to an embodiment of the present invention.
  • the pressure sensing device 100 includes an electrode 10, a driving unit 20 for applying a driving signal to the electrode 10, and a capacitance from an output terminal of the electrode 10. It may include a detection unit 30 for receiving the received signal including the information for detecting the information on the touch pressure.
  • the driving unit 20 applies a driving signal to the electrode 10, and the sensing unit 30 passes through the electrode 10 and the reference potential.
  • the magnitude of the pressure can be detected by measuring the capacitance between the layers 300.
  • the driver 20 may include a clock generator (not shown) and a buffer (not shown), for example, to generate a driving signal in the form of a pulse and apply it to the electrode 10.
  • a clock generator not shown
  • a buffer not shown
  • the driving unit 20 may be implemented through various devices, and the shape of the driving signal may also be variously modified.
  • the driver 20 and the detector 30 may be implemented as an integrated circuit and may be formed on one chip.
  • the driver 20 and the detector 30 may constitute a pressure detector.
  • the electrode 10 is a transparent conductive material (for example, indium tin oxide (ITO) or antimony tin oxide (ATO)) made of tin oxide (SnO 2 ), indium oxide (In 2 O 3 ), or the like. It can be formed as.
  • the electrode 10 may be formed of a transparent conductive material or an opaque conductive material.
  • the electrode 10 may include at least one of silver ink, copper, or carbon nanotubes (CNT).
  • the electrode 10 may be formed to have a large surface facing between the electrode 10 and the reference potential layer 300 so as to easily detect the amount of change in capacitance between the reference potential layer 300 and the reference potential layer 300.
  • the pressure sensing device 100 detects a magnitude of pressure from one electrode 10
  • the pressure sensing device 100 includes a plurality of electrodes 10 and includes a plurality of electrodes 10.
  • the channel may be configured to enable multiple pressure magnitude detectors according to multi touch.
  • the capacitance between the electrode 10 and the reference potential layer is changed according to the distance between the electrode 10 and the reference potential layer 300 according to the embodiment, and the sensing unit 30 detects information on the change in capacitance.
  • the sensing unit 30 detects information on the change in capacitance.
  • the pressure sensing device 100 according to the embodiment may detect the pressure magnitude from the self capacitance value of the electrode 10.
  • FIG. 2 illustrates a cross section of a device 1000 to which a pressure sensing device 100 according to an embodiment of the present invention is applied.
  • the pressure sensing device 100 may be applied to the device 1000 including the reference potential layer 300 to be configured to detect the magnitude of the pressure applied to the device 1000.
  • the electrode 10 may be disposed with the reference potential layer 300 at a predetermined distance d therebetween.
  • a deformable material may be disposed between the electrode 10 and the reference potential layer 300 according to the application of pressure through the object 400.
  • the shape-deformable material disposed between the electrode 10 and the reference potential layer 300 may be air, a dielectric, an elastomer, and / or an impact absorbing material.
  • Reference potential layer 300 may be any potential layer included in device 1000.
  • the reference potential layer can be a ground layer having a ground potential.
  • the capacitance value of the capacitor Cp generated between the electrode 10 and the reference potential layer 300 may increase. That is, as the distance d decreases, the self capacitance value of the electrode 10 with respect to the reference potential layer 300 may increase.
  • the device 1000 to which the pressure sensing device 100 may be applied may be a touch input device 1000 including a touch sensor panel and / or a display panel to detect a touch position.
  • the electrode 10 of the pressure sensing device 100 may be disposed at any position within the touch input device 1000.
  • the electrode 10 may be disposed under the display panel 200.
  • the reference potential layer 300 may be a noise shielding layer of the display panel 200.
  • the reference potential layer 300 may be a shielding layer for noise shielding generated from a central processing unit (CPU) or an application processor (AP) on a main board for operating the touch input device 1000.
  • the reference potential layer 300 may be a mid-frame for distinguishing / supporting the display panel 200 and the main board in the touch input device 1000.
  • the electrode 10 is disposed below the display panel 200. However, this is only an example.
  • the electrode 10 may be disposed at an arbitrary position spaced apart from the reference potential layer 300 by a predetermined distance within the touch input device 1000. Can be.
  • the upper surface of the display panel 200 in the touch input device 1000 is illustrated to constitute a touch surface, this is merely an example and the touch surface may be any other configuration, and the electrode may be applied depending on the pressure applied to the touch surface. It is sufficient that the distance between the reference numeral 10 and the reference potential layer 300 can be changed.
  • the pressure sensing device 100 includes a first impedance 11 (Z1) between the driving unit 20 and the electrode 10, and the electrode 10 and the reference potential.
  • a second impedance 12 (Z2) is included between the layers 300. The first impedance 11 and the second impedance 12 will be described in detail below.
  • 3 is a diagram illustrating an equivalent circuit of the pressure sensing device 100 according to the first embodiment. 3 illustrates an equivalent circuit for the region of the electrode 10 and the sensing unit 30 of the pressure sensing device 100.
  • Vs is a driving signal applied to the electrode 10.
  • the driving signal applied to the electrode 10 may be a voltage signal over time.
  • the driving signal Vs may be applied in the form of a series of pulses.
  • the second impedance 12 is present between the output terminal Rx and the reference potential layer 300 for sensing the received signal from the electrode 10 in the sensing unit 30, and the second impedance 12 is a pressure capacitor ( Cp).
  • the pressure capacitor Cp may be shown to be located between the coupling portion 14 and the ground, which is the reference potential layer 300. In this case, the pressure capacitor Cp may be displayed to vary because the capacitance changes according to the distance between the electrode 10 and the reference potential layer 300.
  • the electrode 10 may be configured between the input terminal Tx and the output terminal Rx.
  • 3 illustrates a case where the first impedance 11 is a pure capacitor C1.
  • the pressure sensing device 100 may provide a performance that does not depend on the operating frequency of the driving signal Vs.
  • the technical spirit of the present invention is not limited thereto, and the first impedance 11 may be a capacitive load, a resistive load, or an inductive load, and the second impedance 12 may be a capacitive load, a resistive load, or It may be an inductive load.
  • the first impedance 11 may be interpreted as being formed outside of a chip in which a pressure detector is integrated between the driver 20 and the electrode 10.
  • the first impedance 11 may be formed on a conductive trace connecting the chip and the electrode to the outside of the chip.
  • this is merely a configuration embodiment, and it is also possible for the first impedance 11 to be integrated together on a chip on which the pressure detector is integrated. Since the first impedance 11 is implemented in the chip, there is no need for additional external devices, thereby reducing the unit cost. It can also be connected to an electrode for any pressure detection to provide uniform pressure detection performance.
  • the sensing unit 30 may include an analog-to-digital converter (ADC) 33 directly connected to the output terminal Rx of the electrode 10.
  • ADC analog-to-digital converter
  • the ADC 33 may convert the analog data signal Vo passed through the capacitance sensor into digital data. Subsequently, the digital data may be input to a processor such as an AP or a CPU and processed to obtain a magnitude of touch pressure.
  • the detector 30 may further include a processor.
  • the magnitude of the first impedance 11 and the magnitude of the second impedance 12 are substantially the same.
  • the magnitude of the first impedance 11 and the magnitude of the second impedance 12 are substantially the same, and can be proved by the following equations.
  • Vo (1) is in accordance with the law of voltage distribution.
  • Vo (2) is in accordance with the law of voltage distribution. to be.
  • the magnitude of the first impedance 11 and the magnitude of the second impedance 12 are substantially the same, so that the sensitivity characteristic for pressure sensing is maximized.
  • 4 and 5 are graphs for demonstrating a range of k values capable of improving sensitivity characteristics in the pressure sensing device 100 according to the first embodiment.
  • the X axis represents a range of k values
  • the Y axis represents a result value of Equation 2.
  • FIG. 4 is a graph showing the result of substituting [Equation 2] on the assumption that C is 100 and ⁇ C is 1.
  • Equation 2 when the pressure of the object 400 is applied to the touch surface of the configuration 200 forming the touch surface, the analog data signal at the output terminal Rx with respect to the driving signal Vs ( Since the change amount ⁇ V of Vo) is maximum and the result of Equation 2 has the maximum value when k is 1, the value of k is 1, that is, the magnitude of the first impedance 11.
  • the magnitudes of the second impedance 12 are substantially the same, it means that the sensitivity characteristic for pressure sensing of the pressure sensing device or the pressure detector according to the embodiment of the present invention is maximized.
  • the range included in the value of 3 dB smaller than the maximum value is included in the range of the maximum value. Since it can be recognized as belonging to, it can be understood that it is included in the scope of the technical idea of the present invention by calculating the k value included in this region.
  • the technical idea in the present invention may be understood that the magnitude of the first impedance 11 is in the range of 0.3 times the magnitude of the second impedance 12 to 3.3 times the magnitude 12 of the second impedance. .
  • the sensitivity characteristic for pressure sensing of the pressure sensing device or the pressure detector is improved compared to the conventional apparatus.
  • Table 2 The resulting correction values shown in Table 2 are shown in FIG. 5.
  • [Table 2] assumes that the sensitivity value is maximized when the value of k is 1, and the value of each k value relative to the result of [Equation 2] when the value of k is 1 is shown.
  • the ratio of the resultant value of Equation 2 is expressed as the resultant correction value of Equation 2. That is, when the sensitivity characteristic is in the range of 3 dB compared to the maximum improvement, the value of the X axis corresponds to the range of k value when the value of the Y axis is about 0.707 to 1 in FIG. 5.
  • the problem and technical idea to be solved of the present invention are the magnitude of the first impedance 11. It can be seen that the range of 0.3 times the magnitude of the second impedance 12 to 3.3 times the magnitude 12 of the second impedance.
  • 6 is a diagram illustrating an equivalent circuit of the pressure sensing device 100 according to the second embodiment. 6 illustrates an equivalent circuit for the region of the electrode 10 and the sensing unit 30 of the pressure sensing device 100.
  • Vs is a driving signal applied to the electrode 10.
  • the second impedance 12 is present between the output terminal Rx and the reference potential layer 300 for sensing the received signal from the electrode 10 in the sensing unit 30, and the second impedance 12 is a pressure capacitor ( Cp).
  • the pressure capacitor Cp may be shown to be located between the coupling portion 14 and the ground, which is the reference potential layer 300. In this case, the pressure capacitor Cp may be displayed to vary because the capacitance changes according to the distance between the electrode 10 and the reference potential layer 300.
  • the electrode 10 may be configured between the input terminal Tx and the output terminal Rx. 6 illustrates a case where the first impedance 11 is a pure capacitor C1. By configuring the first impedance 11 as a pure capacitor as shown in FIG. 6, the pressure sensing device 100 may provide a performance that does not depend on the operating frequency of the driving signal Vs.
  • the detector 30 may include an ADC 33 and a buffer circuit 31 connected between the ADC 33 and the output terminal Rx of the electrode 10.
  • the buffer circuit 31 may be a circuit that temporarily stores the analog data signal Vo before transmitting the received signal output from the output terminal Rx to the ADC 33.
  • the ADC 33 may convert the analog data signal Vo passed through the buffer circuit 31 into digital data. Subsequently, the digital data may be input to a processor such as an AP or a CPU and processed to obtain a magnitude of touch pressure.
  • the detector 30 may further include a processor.
  • the magnitude of the first impedance 11 and the magnitude of the second impedance 12 are substantially the same.
  • the technical idea in the present invention substantially ranges from 0.3 times the size of the second impedance 12 to 3.3 times the size 12 of the second impedance 12. It can be understood as mine. In this case, it can be determined that the sensitivity characteristic for pressure sensing of the pressure sensing device or the pressure detector is improved compared to the conventional apparatus.
  • FIG. 7 is a diagram illustrating an equivalent circuit of the pressure sensing device 100 according to the third embodiment.
  • FIG. 8 is a diagram showing the configuration of the amplifier circuit 32 of FIG.
  • FIG. 7 illustrates an equivalent circuit for the region of the electrode 10 and the sensing unit 30 of the pressure sensing device 100.
  • the sensing unit 30 includes an ADC 33 and an amplifier circuit 32 connected between the ADC 33 and the output terminal Rx of the electrode 10. Can be configured.
  • the amplifying circuit 32 may include a capacitance sensor including an amplifier 32-1, an input terminal capacitor C2, and a feedback capacitor CFB.
  • the feedback capacitor CFB is a capacitor coupled between the negative input terminal of the amplifier 32-1 and the output terminal of the amplifier 32-1, that is, the feedback path.
  • the positive input terminal of the amplifier 32-1 may be connected to a ground or a reference potential Vref.
  • the capacitance sensor may further include a reset switch (not shown) connected in parallel with the feedback capacitor CFB.
  • the reset switch can reset the conversion from the voltage at the current carried by the capacitance sensor.
  • the negative input terminal of the amplifier 32-1 receives an electric current signal including information on the capacitance of the pressure capacitor Cp from the electrode 10 through the receiving end Rx and integrates the analog data signal ( Vo).
  • the detector 30 may include an ADC 33 capable of converting the analog data signal Vo passing through the capacitance sensor into digital data. Subsequently, the digital data may be input to a processor such as an AP or a CPU and processed to obtain a magnitude of touch pressure.
  • the detector 30 according to the embodiment may further include a processor.
  • the magnitude of the first impedance 11 and the magnitude of the second impedance 12 are substantially the same.
  • the technical idea in the present invention substantially ranges from 0.3 times the size of the second impedance 12 to 3.3 times the size 12 of the second impedance 12. It can be understood as mine. In this case, it can be determined that the sensitivity characteristic for pressure sensing of the pressure sensing device or the pressure detector is improved compared to the conventional apparatus.

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  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
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  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Power Engineering (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

La présente invention concerne un dispositif de détection de pression, un détecteur de pression et un appareil comprenant ceux-ci. Le dispositif de détection de pression comprend : une électrode; une unité d'excitation pour appliquer un signal d'excitation à l'électrode; une unité de détection pour recevoir, depuis une borne de sortie de l'électrode, un signal de réception comprenant des informations sur la capacité entre l'électrode et une couche de potentiel de référence espacée de l'électrode, la capacité variant en fonction de la distance relative entre l'électrode et la couche de potentiel de référence; une première impédance définie entre l'unité d'excitation et l'électrode; et une deuxième impédance définie entre l'électrode et la couche de potentiel de référence, l'amplitude de la première impédance étant sensiblement la même que l'amplitude de la deuxième impédance.
PCT/KR2018/001899 2017-02-16 2018-02-13 Dispositif de détection de pression, détecteur de pression, et appareil comprenant ceux-ci Ceased WO2018151510A1 (fr)

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KR10-2017-0021140 2017-02-16
KR1020170021140A KR101939195B1 (ko) 2017-02-16 2017-02-16 압력 센싱 장치, 압력 검출기 및 이들을 포함하는 장치

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KR20170016072A (ko) * 2015-08-03 2017-02-13 주식회사 하이딥 터치 검출기, 터치 검출 칩 및 터치 입력 장치

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KR20110022727A (ko) * 2008-07-29 2011-03-07 모토로라 모빌리티, 인크. 전자 디바이스를 위한 단면 전기 용량 힘 센서
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KR20120086055A (ko) * 2011-01-25 2012-08-02 삼성전기주식회사 터치 압력을 검출할 수 있는 터치 스크린 장치 및 이를 갖는 전자 장치
KR20160132671A (ko) * 2015-05-11 2016-11-21 주식회사 하이딥 압력 센싱 장치, 압력 검출기 및 이들을 포함하는 장치
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