WO2018145299A1 - 压力检测方法及其装置以及电子终端 - Google Patents

压力检测方法及其装置以及电子终端 Download PDF

Info

Publication number
WO2018145299A1
WO2018145299A1 PCT/CN2017/073243 CN2017073243W WO2018145299A1 WO 2018145299 A1 WO2018145299 A1 WO 2018145299A1 CN 2017073243 W CN2017073243 W CN 2017073243W WO 2018145299 A1 WO2018145299 A1 WO 2018145299A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrode
pressure
electrical signal
pressure sensing
output electrical
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/CN2017/073243
Other languages
English (en)
French (fr)
Inventor
程雷刚
文达飞
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.)
Shenzhen Goodix Technology Co Ltd
Original Assignee
Shenzhen Goodix Technology Co Ltd
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.)
Filing date
Publication date
Application filed by Shenzhen Goodix Technology Co Ltd filed Critical Shenzhen Goodix Technology Co Ltd
Priority to CN201780000681.3A priority Critical patent/CN107278285B/zh
Priority to EP17851946.8A priority patent/EP3379393B1/en
Priority to PCT/CN2017/073243 priority patent/WO2018145299A1/zh
Priority to US15/937,832 priority patent/US10540037B2/en
Publication of WO2018145299A1 publication Critical patent/WO2018145299A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
    • 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
    • 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
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • 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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04105—Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position

Definitions

  • the embodiments of the present invention relate to the field of pressure detection technologies, and in particular, to a pressure detecting method and device thereof, and an electronic terminal.
  • Touch technology such as application on a smart terminal, allows the user to operate the terminal by gesture operation, and get rid of the traditional mechanical keyboard, making human-computer interaction more straightforward.
  • touch technology such as capacitive touch
  • simple finger touch can no longer satisfy users.
  • Dimensional input requirements adding pressure detection technology (Force Touch) to the capacitive touch screen can increase an input dimension, allowing the touch screen to sense finger pressure information, and feel the intensity of light pressure and heavy pressure, so that when the user presses the display screen, not only will Producing a two-dimensional coordinate input will also generate a third-dimensional pressure input and output different functions to provide a better user experience.
  • the pressure detecting technology of the touch screen the change of the capacitance formed by the pressure sensing electrode and the reference electrode in the pressure sensor is generally detected, and then combined with the display device to realize the touch display.
  • the existing capacitance detecting method there are two capacitors, one is a pressure detecting capacitor formed by a pressure sensing electrode and a reference electrode, and a pressure deformation occurs between the pressure sensing electrode and the reference electrode.
  • the gap the change in the size of the capacitor represents a change in the magnitude of the pressure.
  • the pressure detection model is complicated on the one hand due to the existence of load capacitance, and the total capacitance is increased on the other hand, so that the detection voltage variation is reduced; in addition, the influence of environmental changes on the load capacitance will be Equivalent to the pressure detection capacitor, but in the prior art pressure detection model, the default load capacitance is constant, resulting in an increase in the impact of environmental changes on the pressure performance; finally, the presence of load capacitance makes the pressure detection in the prior art
  • the model is difficult to achieve environmental self-calibration and (GAP) self-calibration of the initial gap between the pressure sensing electrode and the reference electrode due to the external capacitor.
  • the purpose of the embodiments of the present application is to provide a pressure detecting method and device thereof, and an electronic terminal for solving at least the above problems in the prior art.
  • the embodiments of the present application provide a pressure detection method, including:
  • the embodiment of the present application further provides a pressure detecting device including a driving electrode, a pressure sensing electrode, and a reference electrode, wherein a voltage dividing capacitor is formed between the driving electrode and the pressure sensing electrode, and the pressure sensing electrode and the reference Forming a pressure detecting capacitor between the electrodes, the gap between the pressure sensing electrode and the reference electrode having a change with the pressure, wherein the voltage dividing capacitor and the pressure detecting capacitor are respectively generated for determining the pressure The output electrical signal of the pressure characteristic data when the sensing electrode is pressed.
  • An embodiment of the present application further provides an electronic terminal including the pressure detecting device in any of the embodiments.
  • an output electrical signal of a voltage dividing capacitor formed between the driving electrode and the pressure sensing electrode, and an output electrical signal of a pressure detecting capacitor formed between the pressure sensing electrode and the reference electrode are obtained.
  • the output electrical signal of the voltage dividing capacitor and the output electrical signal of the pressure detecting capacitor determine pressure characteristic data when the pressure sensing electrode is pressed, simplify the pressure detecting model, increase the voltage variation, and weaken or eliminate the environment. The effect of the change on pressure performance is exacerbated, as well as the self-calibration of the environment and the initial gap (GAP) self-calibration between the pressure sensing electrode and the reference electrode.
  • FIG. 1 is a schematic view showing a laminated structure of a pressure detecting device according to a first embodiment of the present application
  • FIG. 2 is a schematic diagram of an equivalent circuit of a pressure detecting device according to Embodiment 2 of the present application;
  • FIG. 3 is a schematic flow chart of a pressure detecting method according to Embodiment 3 of the present application.
  • FIG. 4 is a schematic diagram showing relationship between pressure characteristic data and pressure values in Embodiment 4 of the present application.
  • FIG. 5 is a schematic flow chart of a pressure detecting method according to Embodiment 5 of the present application.
  • FIG. 6 is a schematic diagram of a curve for implementing pressure characteristic data when affected by the environment in Embodiment 6 of the present application.
  • FIG. 7 is a schematic structural view of a pressure detecting device according to Embodiment 7 of the present application.
  • Embodiment 8 is a schematic structural view of a pressure detecting device according to Embodiment 8 of the present application.
  • FIG. 9 is a schematic diagram of electric field distribution of a pressure detecting device according to Embodiment 9 of the present application.
  • FIG. 10 is a schematic structural view of a pressure detecting device according to Embodiment 10 of the present application.
  • Figure 11 is a schematic diagram showing the structure of an equivalent circuit of the pressure detecting device in the eleventh embodiment of the present application.
  • Embodiment 12 is a schematic flow chart of a pressure detecting method in Embodiment 12 of the present application.
  • FIG. 13 is a schematic diagram of an electric field of a pressure detecting device according to Embodiment 13 of the present application.
  • FIG. 14 is another schematic diagram of an electric field of a pressure detecting device according to Embodiment 14 of the present application.
  • Figure 15 is a schematic view showing the laminated structure of the pressure detecting device in the fifteenth embodiment of the present application.
  • FIG. 16 is a schematic diagram of an electric field of a pressure detecting device according to Embodiment 16 of the present application.
  • Figure 17 is a plan view showing the pressure detecting device in the seventeenth embodiment of the present application.
  • Figure 18 is a plan view showing the pressure detecting device of the eighteenth embodiment of the present application.
  • Figure 19 is a schematic view showing the lamination of the pressure detecting device in the nineteenth embodiment of the present application.
  • FIG. 20 is a schematic diagram of an electric field of a pressure detecting device according to Embodiment 20 of the present application.
  • Figure 21 is a schematic diagram of another electric field of the pressure detecting device in the twenty-first embodiment of the present application.
  • Figure 22 is a plan view showing the pressure detecting device of the twenty-second embodiment of the present application.
  • FIG. 23 is a schematic structural diagram of an application example of a pressure detecting device according to a twenty-third embodiment of the present application.
  • 24 is a schematic structural diagram of an application example of a pressure detecting device according to a twenty-fourth embodiment of the present application.
  • 25 is a schematic structural diagram of an application example of a pressure detecting device in a twenty-fifth embodiment of the present application.
  • 26 is a schematic structural diagram of an application example of a pressure detecting device in a twenty-sixth embodiment of the present application.
  • FIG. 27 is a schematic structural diagram of an application example of a pressure detecting device in a twenty-seventh embodiment of the present application.
  • FIG. 28 is a schematic structural diagram of an application example of a pressure detecting device according to a twenty-eighth embodiment of the present application.
  • 29 is a schematic structural diagram of an application example of a pressure detecting device in a twenty-ninth embodiment of the present application.
  • FIG. 30 is a schematic structural diagram of an application of a pressure detecting device according to Embodiment 30 of the present application.
  • FIG. 31 is a schematic structural diagram of an application of a pressure detecting device according to Embodiment 31 of the present application.
  • an output electrical signal of a voltage dividing capacitor formed between a driving electrode and a pressure sensing electrode, and an output electrical signal of a pressure detecting capacitor formed between the pressure sensing electrode and the reference electrode are obtained. Determining the pressure characteristic data when the pressure sensing electrode is pressed according to the output electrical signal of the voltage dividing capacitor and the output electrical signal of the pressure detecting capacitor, simplifying the pressure detecting model, increasing the voltage variation, and reducing or eliminating The environmental changes have an increased impact on pressure performance, as well as environmental self-calibration and (GAP) self-calibration of the initial gap between the pressure sensing electrode and the reference electrode.
  • GAP environmental self-calibration and
  • the pressure detecting device of the present embodiment includes a driving electrode 101, a pressure sensing electrode 102, and a reference electrode 103.
  • the driving electrode 101 is specifically In the prior art, the electrode is separately added between the pressure sensing electrode 102 and the load electrode 104, such as the Vcom layer.
  • the reference electrode 103 is specifically a conductive middle frame of the electronic terminal where the pressure detecting device is located, and the reference electrode 103 is connected to the ground.
  • the increased driving electrode 101 and the pressure sensing electrode 102 have the same shape and size.
  • the environmental detecting capacitance C V is formed between the increased driving electrode 101 and the load electrode 104 such as the Vcom layer.
  • the load electrode 104 such as the Vcom layer.
  • other conductive surfaces closest to the pressure sensing electrode other than the reference electrode 103 and the driving electrode 101 may be used as the load electrode 104 as long as the environmental detecting capacitance C V can be formed with the driving electrode 101.
  • a voltage dividing capacitor C S formed between the driving electrode 101 and the pressure sensing electrode 102.
  • the pressure sensing electrode 102 and the reference electrode 103 have a gap that can change with the pressure, so that a pressure detecting capacitor formed between the pressure sensing electrode 102 and the reference electrode 103 C M may be varied according to the change of the gap to determine the pressure when the pressure sensing electrode 102 is pressed according to the output electrical signal of the voltage dividing capacitor C S and the output electrical signal of the pressure detecting capacitor C M Feature data.
  • FIG. 2 is a schematic diagram of an equivalent circuit of the pressure detecting device in the second embodiment of the present invention; in the figure, the point A corresponds to the driving electrode 101, and the point B corresponds to the pressure sensing electrode 102, corresponding to the laminated structure of FIG. 1 above, in this embodiment,
  • the circuit connection relationship between the environmental detection capacitor C V , the voltage dividing capacitor C S and the pressure detecting capacitor C M is as shown in FIG. 2, and the voltage dividing capacitor C S and the pressure detecting capacitor C M are connected in series with each other due to the low output of the driving electrode 101. Impedance, therefore, the environmental detection capacitor C V has no effect on the drive signal. Therefore, the pressure characteristic data can be determined by the voltage division relationship between the voltage dividing capacitor C S and the pressure detecting capacitor C M .
  • FIG. 2 For a technical process of specifically determining the pressure characteristic data, refer to the method embodiment shown in FIG.
  • the load capacitance C L formed between the pressure sensing electrode 102 and the load electrode 104 in the prior art is converted into:
  • the series connection of the piezoelectric capacitor C S and the environmental detection capacitor C V is essentially equivalent to separating the load capacitance C L from the pressure detection capacitor C M , so that a higher voltage signal can be obtained with the same pressure of the same ⁇ C M .
  • the amount of change, so the pressure detection SNR also increases.
  • ⁇ U 1 is the voltage change amount of the pressure detecting capacitor C M in the prior art self-capacity pressure detecting scheme
  • ⁇ U 2 is the voltage change amount of the pressure detecting capacitor C M in the first embodiment
  • U TX is the driving signal Tx.
  • the amplitude, ⁇ C M is the amount of change of the reference pressure detecting capacitor C M0 when the pressure detecting capacitor C M is pressed without pressing, and it can be seen from the above formula that ⁇ U 2 is larger than ⁇ U 1 , if the environmental detecting capacitor C V value is the pressure detecting capacitor When the C M value is N times, the SNR is also increased by N times.
  • FIG. 3 is a schematic flow chart of a pressure detecting method according to Embodiment 3 of the present application; as shown in FIG. 3, it includes:
  • S301 loading a driving signal to the driving electrode and detecting an induction signal output by the pressure sensing electrode;
  • the driving electrode is electrically connected to the driving circuit for providing the driving signal, and the driving circuit applies a constant amplitude AC signal such as a sine wave to the driving electrode 101 by means of coding; the pressure sensing electrode connection
  • the detection circuit detects the sensing signal coupled to the driving signal outputted by the pressure sensing electrode 102 through the detecting circuit.
  • a constant amplitude AC signal ie, a drive signal
  • an induced signal of the pressure sensing electrode 102 is detected at point B.
  • the output electrical signal of the voltage dividing capacitor C S and the output electrical signal of the pressure detecting capacitor C M may be respectively the voltage across the voltage dividing capacitor C S and the voltage across the voltage detecting capacitor C M .
  • step S303 according to the output electrical signal of the voltage dividing capacitor C S and the output electrical signal of the pressure detecting capacitor C M , the pressure characteristic data when the pressure sensing electrode 102 is pressed may be specifically determined.
  • the first partial pressure ratio Rate can be calculated by the formula (2):
  • C S represents a capacitance value of the voltage dividing capacitor
  • C M represents a capacitance value of the pressure detecting capacitor
  • the method may specifically include:
  • ForceData represents pressure characteristic data when the pressure sensing electrode 102 is pressed in the current environment.
  • the method further includes: according to the pressure characteristic data when the pressure sensing electrode 102 is pressed in the current environment and the reference pressure characteristic data when there is no pressing in the current environment. The pressure corresponding to the pressure characteristic data is determined.
  • d M0 is the initial pitch of the pressure sensing electrode 102 to the reference electrode 103
  • ⁇ M is the equivalent dielectric constant of the dielectric between the pressure sensing electrode 102 and the reference electrode 103
  • S is the pressure sensing electrode 102 and the reference
  • k is the elastic modulus of the pressure detecting pressure surface in the electronic terminal, that is, the pressure is converted into a deformation amount, the unit is m/g
  • F is the pressure value when the pressure sensing electrode 102 is pressed.
  • FIG. 4 is a schematic diagram showing the relationship between the pressure characteristic data and the pressure value in the fourth embodiment of the present application; as shown in FIG. 4, referring to the above formula (5), it can be seen that the pressure characteristic data ForceData is linear with the pressure value F, when the pressure is The initial spacing d M0 of the sensing electrode 102 and the reference electrode 103 is changed from the factory, and the current initial distance d′ M0 is obtained . According to the above formula (5), the reference pressure characteristic data ForceData′ 0 when there is no pressing in the current environment is obtained:
  • the pressure value F at the time of pressure is determined based on the difference in the characteristic data. It can be seen that, on the basis of the embodiment of FIG. 3, when the pressure value F is calculated by calculating the pressure characteristic data difference, the reference pressure characteristic data reflecting the influence of the initial distance cancels each other, so that the pressure value F is not affected by the initial distance change. The effect of self-calibration on the initial spacing (GAP) is achieved.
  • FIG. 5 is a schematic flow chart of a pressure detecting method according to Embodiment 5 of the present application; as shown in FIG. 5, in this embodiment, the pressure characteristic data affected by temperature or humidity in the environment is taken as an example for description, specifically, the following steps are included. :
  • S501 Obtain a change factor of an environmental signal affected by an output voltage of a voltage dividing capacitor formed between the driving electrode and the pressure sensing electrode;
  • the gap between the driving electrode 101 and the pressure sensing electrode 102, the facing area, and the dielectric constant of the dielectric are affected by the temperature and humidity in the environment, and the change is directly reflected in the voltage dividing capacitor C S .
  • the output electrical signal therefore, by measuring the ratio of the real-time output signal of the voltage dividing capacitor C S in the current environment to the reference output electrical signal of the voltage dividing capacitor C S in a predetermined fixed environment, thereby calculating the voltage dividing capacitor C
  • the output electrical signal of S is subject to environmental change factors.
  • the output electrical signal of the voltage dividing capacitor C S is subjected to an environmental influence factor ⁇ CS calculation formula such as (9):
  • C S0 is the reference coupling capacitor of the voltage divider capacitor in a preset fixed environment such as the factory environment
  • C ST is the coupling capacitor of the voltage divider capacitor in the real-time environment, and is widely fixed by the voltage divider capacitor C S
  • the factor it can be determined under the condition that the pressure sensing electrode is pressed, or can be determined when the pressure sensing electrode is not pressed, and will not be described in detail.
  • the pressure sensing electrode 102 when determining the reference output electrical signal or the real-time output electrical signal, the pressure sensing electrode 102 may be detected by loading a driving signal on the driving electrode 101 in a corresponding preset fixed environment or correspondingly in the current environment.
  • the sensing signal is in the mutual capacitance detection mode to determine the reference output electrical signal and the real-time output signal in the current environment, and then the real-time output signal in the current environment and the reference output electrical signal of the voltage dividing capacitor C S in a preset fixed environment
  • the change factor ⁇ CS of the output electrical signal of the voltage dividing capacitor C S is affected by the environment.
  • S502 Obtain a change factor that the output electrical signal of the pressure detecting capacitor is affected by the environment according to a change factor of the output electrical signal of the voltage dividing capacitor;
  • the dielectric constant of the dielectric between the driving electrode 101 and the pressure sensing electrode 102 is changed by the temperature and humidity in the environment. Similarly, the dielectric constant of the dielectric between the pressure sensing electrode 102 and the reference electrode 103 is affected. Environmental impacts will also change.
  • the change factor of the output electrical signal of the voltage dividing capacitor C S determined by the environment is affected by the change factor of the environment, and the change factor of the output electrical signal of the pressure detecting capacitor C M is calibrated by the environment, so that the The voltage dividing capacitor C S can be used as an environmental sensor through which the influence of environmental changes on the change of the pressure detecting capacitor C M is determined.
  • the relationship between the change factor of the output electrical signal of the voltage dividing capacitor C S and the change factor of the output electrical signal of the pressure detecting capacitor C M is affected by the environment, and then the material test is performed in advance.
  • the change factor of the output electrical signal of the voltage dividing capacitor C S is affected by the environment to determine the change factor ⁇ ⁇ M of the output electrical signal of the pressure detecting capacitor C M that is affected by the environment.
  • S503 determining a change factor of the pressure characteristic data affected by the environment according to a change factor of the output electrical signal of the voltage dividing capacitor and an environmentally affected change factor of the output electrical signal of the pressure detecting capacitor;
  • the pressure characteristic data is affected by the environmental change factor ⁇ :
  • S504 Determine, according to a change factor of the environmental characteristic data of the pressure characteristic data, an output electrical signal of the voltage dividing capacitor, and an output electrical signal of the pressure detecting capacitor, pressure characteristic data when the pressure sensing electrode is pressed under the current environment. ;
  • Equation (11) is shown by the dotted line in Figure 6, and the slope is Equation (5) is shown by the solid line in Figure 6, with a slope of
  • the change factor of the pressure detection capacitance affected by the environment may be obtained according to a change factor of the voltage-divided capacitance affected by the environment, and the change factor of the environment-affected capacitance according to the pressure detection Calibrating an output electrical signal of the pressure detecting capacitor, so that the pressure sensing electrode can be pressed under the current environment according to the output electrical signal after the voltage dividing capacitor calibration and the output electrical signal after the pressure detecting capacitor calibration Pressure characteristic data at the time. It should be noted that, in another embodiment, if the environment has no influence on the pressure detecting capacitor, the output electrical signals of the voltage dividing capacitor and the pressure detecting capacitor may not be calibrated, and details are not described herein.
  • S505. Determine a pressure value corresponding to the current environment when the pressure is based on the pressure characteristic data in the current environment when the pressure is pressed and the reference pressure characteristic data in the current environment when there is no pressure.
  • the pressure characteristic data difference ⁇ ForceData' in the current environment can be calculated by the following formula (12)
  • FIG. 7 is a schematic structural view of a pressure detecting device according to Embodiment 7 of the present application; as shown in FIG. 7, on the basis of the above embodiment of FIG. 1, the load electrode 104 (for example, the Vcom layer) and the edge of the pressure sensing electrode 102 are still A small portion of the load capacitance C L will remain. The presence of the load capacitance C L will affect the real-time pressure detection performance. For this reason, referring to FIG. 8 , FIG. 8 is a schematic structural diagram of the pressure detecting device according to the eighth embodiment of the present application. As shown in FIG. 8, in order to eliminate the influence of the load capacitance C L shown in FIG. 7, in the embodiment shown in FIG.
  • FIG. 9 is a schematic diagram of electric field distribution of the pressure detecting device according to Embodiment 9 of the present application.
  • the area of the driving electrode 101 is larger than the pressure sensing electrode 102, the edge of the pressure sensing electrode 102 and the Vcom layer are The formation of the load capacitance C L as shown in FIG. 7 is extremely small, and the influence on the pressure detection performance is negligible.
  • the method embodiment for determining the pressure characteristic data and the corresponding pressure value can also be applied to the laminated structure of the pressure detecting device shown in FIG. 8 , and details are not described in detail.
  • FIG. 10 is a schematic structural view of a pressure detecting device according to Embodiment 10 of the present application; as shown in FIG. 10, in the present embodiment, the area of the pressure sensing electrode 102 is larger than the area of the driving electrode 101, and therefore, the pressure sensing electrode 102 and the load electrode 104 A load capacitance C L is formed between the Vcom layers.
  • a voltage dividing capacitor C S is formed between the pressure sensing electrode 102 and the driving electrode 101
  • a pressure detecting capacitor C M is formed between the pressure sensing electrode 102 and the reference electrode 103
  • the driving electrode 101 and the load electrode 104 are formed as a Vcom layer.
  • the environmental detection capacitor C V The environmental detection capacitor C V .
  • FIG. 11 is a schematic diagram showing an equivalent circuit structure of a pressure detecting device according to Embodiment 11 of the present application; as shown in FIG. 11, an equivalent circuit structure established by the pressure detecting device shown in FIG. 10, a pressure detecting capacitor C M and a load capacitor After C L is connected in parallel and then connected in series with the voltage dividing capacitor C S , the environmental detection capacitor C V has almost no influence on the driving signal due to the low output impedance of the driving electrode.
  • FIG. 10 is only an exemplary structure for forming a load capacitor.
  • a load capacitor may be formed in the structure of FIG. 7.
  • the equivalent circuit structure of FIG. 11 may be referred to, and details are not described herein again.
  • FIG. 12 is a schematic flowchart of a pressure detecting method according to Embodiment 12 of the present application; as shown in FIG. 12, it includes:
  • the driving signal is applied to the driving electrode 101 and the sensing signals output from the pressure sensing electrode 102 are obtained.
  • the output electrical signal of the capacitor is similar to the detection method corresponding to the embodiment of FIG. 1 and will not be described here.
  • the driving signal is applied to the pressure sensing electrode 102 and the sensing signal outputted through the driving electrode 101, and the output electrical signals of the respective capacitors are obtained in a similar manner to step S1201.
  • step S1203 Calculate first pressure original feature data according to a ratio of an output electrical signal of the voltage dividing capacitor in step S1201 to a sum of an output electrical signal of the pressure detecting capacitor, the load capacitor, and the voltage dividing capacitor;
  • FIG. 13 is a schematic diagram of an electric field of the pressure detecting device in the thirteenth embodiment of the present application; the electric field can specifically calculate the output electric signal of the voltage dividing capacitor C S and the pressure detecting capacitor C by using formula (14).
  • M the load capacitance and the capacitance C S dividing the sum of the electrical output signal and a first pressure ratio Rate 1 wherein the raw data RawData 1.
  • step S1204 Calculate second pressure original feature data according to a ratio of an output electrical signal of the voltage dividing capacitor in step S1202 and an output electrical signal of the environmental detecting capacitor and the voltage dividing capacitor;
  • FIG. 14 is another schematic diagram of an electric field of the pressure detecting device according to Embodiment 14 of the present application; specifically, the signal value of the output electrical signal of the environmental detecting capacitor C V can be separately calculated by the formula (15)
  • the sum of the signal values of the environmental detection capacitor C V and the output electrical signal of the voltage dividing capacitor C S determines the second partial pressure ratio Rate 2 and the second pressure original characteristic data RawData 2 , and the second pressure original characteristic data is equivalent to the current Environmental characteristics data in the environment.
  • the output electrical signal of the environmental detection capacitor C V is specifically a voltage signal U CV
  • the output electrical signal of the voltage dividing capacitor C S is specifically U CS .
  • step S1204 the sum of the signal value of the output electrical signal of the voltage dividing capacitor C S and the signal value of the environmental detection capacitor C V and the output electrical signal of the voltage dividing capacitor C S is obtained.
  • two proportional, pressure original feature calculation second data, based on the load capacitance C L can be proportional to the capacitance C V of the detection environment, the environment and outputs an electrical signal of the detector capacitance C V, the load capacitance C L is determined The output electrical signal.
  • the distance between the driving electrode 101 and the pressure sensing electrode 102 from the load electrode 104 such as the Vcom layer is approximately equal, and the dielectric constant between the driving electrode 101, the pressure sensing electrode 102 and the load electrode 104 is approximately Equally, therefore, the difference in capacitance value is mainly caused by the difference in the facing area of the driving electrode 101 and the pressure sensing electrode 102 and the load electrode 104, respectively, thereby further fixing the environmental detecting capacitance C V and the load capacitance C L .
  • the proportional relationship is shown in (16):
  • FIG. 15 is a schematic view showing a laminated structure of a pressure detecting device according to a fifteenth embodiment of the present application
  • FIG. 16 is a schematic diagram of an electric field of a pressure detecting device according to a sixteenth embodiment of the present application; as shown in FIGS. 15 and 16, the area of the driving electrode 101 is larger than that of FIG.
  • the pressure sensing electrode 102 at the same time, considers that there is also a load capacitance between the trace of the pressure sensing electrode 102 and the load electrode 104 such as the Vcom layer.
  • a shield electrode 105 is further added to the trace of the pressure sensing electrode 102 and the load electrode 104, such as the Vcom layer, for shielding the trace of the pressure sensing electrode 102 and the load electrode 104.
  • a load capacitor C L is formed, and the shield electrode 105 is disposed between the trace of the pressure sensing electrode and the load electrode, and the shield electrode 105 may be disposed on the same layer as the drive electrode 101, or may be upper or lower. Misplacement setting.
  • the driving electrode 101 and the shielding electrode 105 are electrically connected to a driving signal
  • the driving electrode 101 and the load electrode 104 form an environmental detecting capacitor C V1
  • the shielding electrode 105 and the load electrode 104 form an environmental detecting capacitor C.
  • the pressure sensing electrode 102 and its routing form a pressure detecting capacitor C M1 and C M2 with the reference electrode 103 respectively
  • a voltage dividing capacitor C S1 is formed between the driving electrode 101 and the pressure sensing electrode 102
  • the shielding electrode 105 and the pressure sensing electrode 102 are formed.
  • a voltage dividing capacitor C S2 is formed between the traces, and the sum of the environment detecting capacitor C V1 and the environment detecting capacitor C V2 is equal to the environmental detecting capacitor C V in the above embodiment, and does not participate in the determination of the pressure characteristic data, and the voltage dividing capacitor
  • the sum of C S1 and the voltage dividing capacitor C S2 is equal to the voltage dividing capacitor C S in the above-mentioned determined pressure characteristic data formula
  • the sum of the pressure detecting capacitor C M1 and the pressure detecting capacitor C M2 is equal to C in the above-mentioned determined pressure characteristic data formula. M.
  • the driving electrode 101 when the driving electrode 101 is electrically connected to the driving signal, the driving electrode 101 is loaded onto the shielding electrode 105, and may be driven according to a driving circuit, such as a driving circuit, if a single driving channel is driven.
  • a driving circuit such as a driving circuit
  • the capability is strong, and the same driving signal can be simultaneously applied to the driving electrode 101 and the shielding electrode 105 by using one driving channel; or, if the driving capability of the single driving channel is weak, two driving channels can be used to respectively drive the driving electrode 101 and the shielding Have the same properties (frequency, amplitude, phase, etc.) Drive signal.
  • a driving channel can be used to load driving signals to the plurality of driving electrodes 101 and the plurality of shielding electrodes 105, thereby maximizing Reduce the number of drive channels.
  • the driving electrode 101 and the shielding electrode 105 may be disposed in the same layer. Since the driving electrode 101 and the shielding electrode 105 are loaded with the same driving signal, the driving electrode 101 may be directly used for this purpose.
  • the driving electrode 105 is connected to the driving electrode 101 and the shielding electrode 105 by using a driving channel.
  • the pressure detecting device shown in FIG. 15 may also correspond to the pressure detecting method similar to the above-described pair 1 and the method of determining the pressure value, and details will not be described in detail.
  • Figure 17 is a plan view showing the pressure detecting device of the seventeenth embodiment of the present application
  • Figure 18 is a plan view showing the pressure detecting device of the eighteenth embodiment of the present application
  • the shielding electrode 105 is shown for clarity. The layout of the line is omitted, and other components are omitted, and details are not described in detail.
  • a shield electrode 105 is disposed correspondingly to the trace of each of the pressure sensing electrodes 102.
  • the plurality of shield electrodes 105 share one drive channel, and the plurality of drive electrodes 101 can share one drive channel, the shield electrode 105 and the drive electrode.
  • a drive channel can also be shared between 101.
  • the driving electrode 101 by setting an area larger than the driving electrode 101, the driving electrode 101 simultaneously forms a voltage dividing capacitor C S with the pressure sensing electrode 102 and its wiring, and the pressure sensing electrode 102 and its wiring and the reference electrode 103 are formed.
  • Pressure detection capacitor C M Pressure detection capacitor
  • Figure 19 is a schematic view showing the lamination of the pressure detecting device in the nineteenth embodiment of the present invention.
  • the area of the driving electrode 101 is smaller than the area of the pressure sensing electrode 102, and the pressure sensing electrode 102 and the load are at this time.
  • Electrode 104 such as the Vcom layer, forms a load capacitance C L .
  • the presence of the environmental interference capacitance formed by the trace of the drive electrode 101 and the reference electrode 103 is considered, and the influence on the environmental characteristic data is eliminated.
  • a shield electrode 105 is disposed between the trace of the driving electrode 101 and the reference electrode 103, and the shield electrode 105 is used to shield the environmental interference formed between the trace of the driving electrode 101 and the reference electrode 103.
  • the capacitor and the shielding electrode 105 are disposed between the wiring of the driving electrode 101 and the reference electrode 103.
  • the shielding electrode 105 may be disposed in the same layer as the pressure sensing electrode 102, or may be disposed upside down. In this embodiment, the shield electrode 105 and the pressure sensing electrode 102 may be located in the same layer.
  • FIG. 20 is a schematic diagram of an electric field of the pressure detecting device according to the embodiment 20 of the present application
  • FIG. 21 is another schematic diagram of the electric field of the pressure detecting device according to the twenty-first embodiment of the present application
  • FIG. 20 and FIG. 21 are corresponding to the electric field of FIG. schematic diagram.
  • the driving electrode 101 and the pressure sensing are respectively obtained.
  • An output electrical signal of the voltage dividing capacitor C S formed between the electrodes 102, an output electrical signal of the pressure detecting capacitor C M formed between the pressure sensing electrode 102 and the reference electrode 103, the pressure sensing electrode 102 and the load An output electrical signal of the load capacitance C L formed by the electrode 104;
  • the shield electrode 105 is suspended when a driving signal is applied to the driving electrode 101. In the floating state; when the driving signal is applied to the pressure sensing electrode 102, the same driving signal is simultaneously applied to the shield electrode 105.
  • the environmental detection capacitor C V1 and the environmental detection capacitor C V2 are summed to obtain the environmental detection capacitance C V in the determined pressure characteristic data formula, and the voltage dividing capacitor C S1 and the voltage dividing capacitor C S2 are summed to obtain the determined pressure.
  • the voltage dividing capacitor C S , the pressure detecting capacitor C M1 and the pressure detecting capacitor C M1 in the characteristic data formula are summed to obtain the pressure detecting capacitor C M in the determined pressure characteristic data formula.
  • the C V , C S , C M , and C L obtained here are brought into the above formulas (14) and (15) to calculate pressure characteristic data.
  • the pressure value F can also be determined according to the formula (8).
  • Figure 22 is a plan view showing the pressure detecting device of the twenty-second embodiment of the present application; as shown in Figure 22, for the laminated view of the pressure detecting device shown in Figure 19, in order to clearly show the driving electrode 101, the pressure sensing electrode 102, The relationship between the shield electrodes 105 is omitted, and other related components are omitted.
  • Each of the shield electrodes 105 is provided for each of the pressure sensing electrodes 102.
  • the plurality of shield electrodes 105 may share the same driving channel, or may be separately provided.
  • the driving channel, the pressure sensing electrode 102 and the shielding electrode 105 may share the same driving channel, or may be separately provided with different driving channels, which may be set according to the driving capability of the driving channel.
  • the pressure sensing electrode 102 having a larger area can be disposed, so that the pressure sensing electrode 102 simultaneously functions as the shielding electrode 105 in this embodiment, which will not be described below.
  • FIG. 23 is a schematic structural diagram of an application example of a pressure detecting device according to Embodiment 23 of the present application; as shown in FIG. 23, in actual application, the driving electrode 101 and the pressure sensing electrode 102 can be made into an induction in the above embodiment.
  • the sensor 100 simultaneously multiplexes the conductive middle frame of the electronic terminal where the pressure detecting device is located as the reference electrode 103 therein to form the above-described pressure detecting device.
  • a filler such as a foam 109 is disposed between the pressure sensing electrode and the conductive middle frame in the inductor 100.
  • the filler such as the upper foam 108 disposed between the inductor 100 and the lower glass 107 is as far as possible to transmit the user's compression deformation to the inductor 100.
  • FIG. 24 is a schematic structural diagram of an application example of a pressure detecting device according to Embodiment 24 of the present application; as shown in FIG. 24, unlike the above-described embodiment of FIG. 23, the pressure sensing electrode and the conductive middle frame in the inductor 100 are shown in FIG.
  • the lower foam 109 is disposed and has an air gap between the lower foam 109 and the conductive middle frame, thereby increasing the deformation amount of the pressure sensing capacitance at the time of pressure.
  • FIG. 25 is a schematic structural view showing an application example of the pressure detecting device in the twenty-fifth embodiment of the present application; as shown in FIG. 25, unlike the above-described embodiment of FIG. 24, the bubble between the inductor 100 and the lower glass 107 is omitted.
  • the cotton 108 and the like are filled, and the inductor 100 is directly disposed on the lower surface of the lower glass 107, that is, the pressure sensing electrode and the driving electrode are sandwiched by a filler which can be deformed according to the pressure, and the foam is as follows.
  • the substrate whose pressure changes is as follows between the glasses.
  • the filler between the driving electrode and the pressure sensing electrode may also be hollowed out to be hollowed out to adjust, for example, a size of a voltage dividing capacitor formed between the driving electrode and the pressure sensing electrode.
  • FIG. 26 is a schematic structural view showing an application example of a pressure detecting device according to a twenty-sixth embodiment of the present application; as shown in FIG. 26, different from the above-described embodiment of FIG. 25, a foam is disposed between the inductor 100 and the conductive middle frame. 109 and the lower foam 109 maintains an air gap with the conductive middle frame, thereby increasing the deformation amount of the pressure sensing capacitance when pressed.
  • the inductor may include upper and lower electrodes, that is, a driving electrode and a pressure sensing electrode. At this time, the load capacitance between the Vcom layer and the pressure sensing electrode in the prior art is avoided by the driving electrode, thereby eliminating the load capacitance when determining the pressure characteristic data.
  • FIG. 27 is a schematic structural diagram of an application example of a pressure detecting device according to a twenty-seventh embodiment of the present application; in this embodiment, an optical component 111 and a lower glass 107, a Vcom layer, an upper glass 106, which are sequentially located above the optical component 111,
  • the cover plate 110 thus has a metal back shell as the load electrode 104, and the Vcom layer therein serves as the reference electrode 103, and the Vcom layer has an air gap with the pressure sensing electrode 102 in the inductor 100. , thereby forming a pressure detecting capacitor C M .
  • FIG. 28 is a schematic structural diagram of an application example of the pressure detecting device in the twenty-eighth embodiment of the present application; in this embodiment, the middle frame serves as the reference electrode 103, and the pressure sensing electrode 102 and the middle frame of the inductor 100 have compressible flexibility. Glue to form a pressure sensing capacitor C M .
  • the driving electrode 101 can multiplex the electrodes in the touch sensor 113. Both the pressure sensing electrode 102 and the driving electrode 101 are located on the periphery of the effective display area of the electronic device where the pressure detecting device is located.
  • FIG. 29 is a schematic structural diagram of an application example of a pressure detecting device according to Embodiment 29 of the present application; as shown in FIG. 29, in this embodiment, for a case where a corresponding virtual button electrode 115 is set due to setting a virtual button, the driving electrode 101 may be The virtual button electrode 115 is multiplexed.
  • FIG. 30 is a schematic structural diagram of an application of a pressure detecting device according to Embodiment 30 of the present application; as shown in FIG. 30, in the embodiment, the sensor 100 includes an electrode as a pressure sensing electrode 102, and a driving electrode in the sensor 100.
  • the 101 multiplexed load electrode 104 such as the Vcom layer, is controlled by time division, so that the Vcom layer can be used as the drive electrode 101 on the one hand, and on the other hand can function similarly to the Vcom layer in the prior art.
  • FIG. 31 is a schematic structural diagram showing an application of the pressure detecting device according to Embodiment 31 of the present application; as shown in FIG. 31, unlike FIG. 30, an air gap similar to that of FIG. 20 is disposed.
  • the shape of the driving electrode and the pressure sensing electrode are both rectangular; or the shape of the driving electrode is circular, and the shape of the pressure sensing electrode is rectangular.
  • the embodiment of the present application further provides an electronic terminal, which may include the pressure detecting device in any of the above embodiments.
  • the electronic terminal may specifically be a watch, a tablet, a touch pad, a pressure gauge or a mobile phone.
  • the apparatus provided by the embodiments of the present application can be implemented by a computer program.
  • Those skilled in the art should be able to understand that the foregoing unit and module division manners are only one of a plurality of division manners. If the division is other units or modules or does not divide the blocks, as long as the information object has the above functions, it should be in the present application. Within the scope of protection.
  • embodiments of the present application can be provided as a method, apparatus (device), or computer program product.
  • the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware.
  • the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

Landscapes

  • 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

本申请实施例提供一种压力检测方法及其装置以及电子终端，压力检测方法包括：获得驱动电极与压力感应电极之间形成的分压电容的输出电信号，以及所述压力感应电极与参考电极之间形成的压力检测电容的输出电信号，所述压力感应电极与所述参考电极之间具有可随所述压力发生变化的间隙；根据所述分压电容的输出电信号和所述压力检测电容的输出电信号，确定所述压力感应电极受压时的压力特征数据。本申请实施例简化了压力检测模型，增加了电压变化量，减弱或消除了环境变化对压力性能影响加剧，以及实现环境自校准和压力感应电极和参考电极之间初始间隙的(GAP)自校准。

Description

压力检测方法及其装置以及电子终端 技术领域
本申请实施例涉及压力检测技术领域，尤其涉及一种压力检测方法及其装置以及电子终端。
背景技术
触控技术如应用在智能终端上，可以让使用者只要通过手势操作即可实现终端的操作，摆脱了传统的机械键盘，使人机交互更为直截了当。
在目前大部分电子产品中，用户手指触摸显示屏只会产生二维的坐标输入，但是，随着触控技术的发展，比如电容触控为例，单纯的手指触控已经不能满足用户更多维度输入的需求，在电容触摸屏中加入压力检测技术(Force Touch)能够增加一个输入维度，让触摸屏能够感知手指压力信息，感知轻压以及重压的力度，这样当用户手指按压显示屏时不仅会产生二维的坐标输入，也会产生第三维的压力输入，并对应输出不同的功能，从而提供更加良好的用户体验。比如在触摸屏的压力检测技术中，通常通过检测压力感应器中压力感应电极与参考电极形成的电容的变化，进一步再与显示设备结合来实现触控显示。
在现有电容检测方式实施的结构中，存在两个电容，一个为压力检测电容，该压力检测电容由压力感应电极和参考电极之间形成，压力感应电极和参考电极之间存在受压发生形变的间隙，该电容的大小变化代表压力大小的变化。除了压力检测电容之外，还存在一个额外的负载电容，该负载电容由压力感应电极与负载电极之间形成，压力感应电极与负载电极之间的间隙几乎不会受压而发生形变。而如果基于现有的压力检测模型，由于负载电容的存在，使得压力检测模型一方面较为复杂，另外一方面增加了总电容，使得检测电压变化量降低；另外，环境变化对负载电容的影响会等效到压力检测电容上，而在现有技术的压力检测模型中缺默认负载电容恒定不变，从而导致环境变化对压力性能影响加剧；最后，负载电容的存在使得现有技术中的压力检测模型由于外接电容器难以实现环境自校准和压力感应电极和参考电极之间初始间隙的(GAP)自校准。
发明内容
本申请实施例的目的在于提供一种压力检测方法及其装置以及电子终端，用以至少解决现有技术中的上述问题。
为实现本申请实施例的目的，本申请实施例提供了一种压力检测方法，其包括：
获得驱动电极与压力感应电极之间形成的分压电容的输出电信号，以及所述压力感应电极与参考电极之间形成的压力检测电容的输出电信号，所述压力感应电极与所述参考电极之间具有可随所述压力发生变化的间隙；
根据所述分压电容的输出电信号和所述压力检测电容的输出电信号，确定所述压力感应电极受压时的压力特征数据。
本申请实施例还提供一种压力检测装置，其包括驱动电极、压力感应电极、参考电极，所述驱动电极与所述压力感应电极之间形成分压电容，所述压力感应电极与所述参考电极之间形成压力检测电容，所述压力感应电极与所述参考电极之间具有可随所述压力发生变化的间隙，所述分压电容和所述压力检测电容分别产生用于确定所述压力感应电极受压时的压力特征数据的输出电信号。
本申请实施例还提供一种电子终端，其包括任一实施例中的压力检测装置。
本申请实施例中，通过获得驱动电极与压力感应电极之间形成的分压电容的输出电信号，以及所述压力感应电极与参考电极之间形成的压力检测电容的输出电信号，再根据所述分压电容的输出电信号和所述压力检测电容的输出电信号，确定所述压力感应电极受压时的压力特征数据，简化了压力检测模型，增加了电压变化量，减弱或消除了环境变化对压力性能影响加剧，以及实现环境自校准和压力感应电极和参考电极之间初始间隙的(GAP)自校准。
附图说明
图1为本申请实施例一中压力检测装置的叠层结构示意图；
图2为本申请实施例二中压力检测装置的等效电路示意图；
图3为本申请实施例三中压力检测方法流程示意图；
图4为本申请实施例四中压力特征数据与压力值的关系示意图；
图5为本申请实施例五中压力检测方法的流程示意图；
图6为本申请实施例六中受环境影响时实施压力特征数据的曲线示意图
图7为本申请实施例七中压力检测装置的结构示意图；
图8为本申请实施例八中压力检测装置的结构示意图；
图9为本申请实施例九中压力检测装置的电场分布示意图，
图10为本申请实施例十中压力检测装置的结构示意图；
图11为本申请实施例十一中压力检测装置的等效电路结构示意图；
图12为本申请实施例十二中压力检测方法的流程示意图；
图13为本申请实施例十三中压力检测装置的一电场示意图；
图14为本申请实施例十四中压力检测装置的另一电场示意图；
图15为本申请实施例十五中压力检测装置的叠层结构示意图；
图16为本申请实施例十六中压力检测装置的电场示意图；
图17为本申请实施例十七中压力检测装置的平面示意图；
图18为本申请实施例十八中压力检测装置的平面示意图；
图19为本申请实施例十九中压力检测装置的叠层示意图；
图20为本申请实施例二十中压力检测装置的一电场示意图；
图21为本申请实施例二十一中压力检测装置的另一电场示意图；
图22为本申请实施例二十二中压力检测装置的平面示意图；
图23为本申请实施例二十三中压力检测装置的应用示例结构示意图；
图24为本申请实施例二十四中压力检测装置的应用示例结构示意图；
图25为本申请实施例二十五中压力检测装置的应用示例结构示意图；
图26为本申请实施例二十六中压力检测装置的应用示例结构示意图；
图27为本申请实施例二十七中压力检测装置的应用示例结构示意图；
图28为本申请实施例二十八中压力检测装置的应用示例结构示意图；
图29为本申请实施例二十九中压力检测装置的应用示例结构示意图；
图30为本申请实施例三十中压力检测装置的应用示例性结构示意图；
图31为本申请实施例三十一中压力检测装置的应用示例性结构示意图。
具体实施方式
以下将配合图式及实施例来详细说明本申请的实施方式，藉此对本申请如何应用技术手段来解决技术问题并达成技术功效的实现过程能充分理解并据以实施。
本申请下述实施例中，通过获得驱动电极与压力感应电极之间形成的分压电容的输出电信号，以及所述压力感应电极与参考电极之间形成的压力检测电容的输出电信号，再根据所述分压电容的输出电信号和所述压力检测电容的输出电信号，确定所述压力感应电极受压时的压力特征数据，简化了压力检测模型，增加了电压变化量，减弱或消除了环境变化对压力性能影响加剧，以及实现环境自校准和压力感应电极和参考电极之间初始间隙的(GAP)自校准。
图1为本申请实施例一中压力检测装置的叠层结构示意图；如图1所示，本实施例中压力检测装置包括驱动电极101、压力感应电极102、参考电极103，驱动电极101具体为在现有技术中的压力感应电极102和负载电极104比如Vcom层之间单独增加的电极，参考电极103具体为压力检测装置所在电子终端的导电中框，参考电极103接系统地。本实施例中，增加的驱动电极101与压力感应电极102的形状面积大小相同。
本实施例中，由于是单独增加的驱动电极101，因此，增加的驱动电极101与负载电极104比如Vcom层之间形成环境检测电容CV。可替代地，除参考电极103和驱动电极101之外距离压力感应电极最近的其他导电面也可以作为负载电极104，只要可以跟驱动电极101可形成环境检测电容CV。所述驱动电极101与压力感应电极102之间形成的分压电容CS。本实施例中，所述压力感应电极102与所述参考电极103之间具有可随所述压力发生变化的间隙，使得所述压力感应电极102与所述参考电极103之间形成的压力检测电容CM可根据所述间隙的变化而变化，以根据所述分压电容CS的输出电信号和所述压力检测电容CM的输出电信号，确定所述压力感应电极102受压时的压力特征数据。
图2为本申请实施例二中压力检测装置的等效电路示意图；图中A点对应驱动电极101，B点对应压力感应电极102，对应于上述图1的叠层结构，本实施例中，环境检测电容CV、分压电容CS和压力检测电容CM之间的电路连接关系如图2所示，分压电容CS和压力检测电容CM相互串联，由于驱动电极101的低输出阻抗，因此环境检测电容CV基本对驱动信号无影响，因此，可以通过分压电容CS与压力检测电容CM的分压关系确定压力特征数据。具体确定压力特征数据的技术处理过程请参见图3所示方法实施例。
上述图1所示实施例中，由于驱动电极101将压力感应电极102与负载电极104相互隔离，故现有技术中压力感应电极102与负载电极104之间形成的负载电容CL转换为：分压电容CS和环境检测电容CV的串联形式，本质上相当于将负载电容CL与压力检测电容CM分离开来，这样同等压力产生同等ΔCM的情况下能够得到更高的电压信号变化量，故压力检测SNR也随之提高。具体示例性的解释如下：
Figure PCTCN2017073243-appb-000001
Figure PCTCN2017073243-appb-000002
公式(1)中ΔU1为现有技术自容压力检测方案中压力检测电容CM的电压变化量，ΔU2为实施例一中压力检测电容CM的电压变化量，UTX为驱动信号Tx幅值，ΔCM为按压时压力检测电容CM相对无按压时的基准压力检测电容CM0的变化量，由上述公式可见，ΔU2大于ΔU1，假如环境检测电容CV值是压力检测电容CM值的N倍，则SNR也提高N倍。
图3为本申请实施例三中压力检测方法流程示意图；如图3所示，其包括：
S301、向所述驱动电极加载驱动信号以及检测所述压力感应电极输出的感应信号；
本实施例中，通过所述驱动电极电连接至提供驱动信号的驱动电路，驱动电路通过打码的方式向所述驱动电极101加载恒定幅值的交流信号比如正弦波；所述压力感应电极连接至检测电路再通过检测电路检测压力感应电极102输出的与所述驱动信号耦合的感应信号。具体地，参照图2，在图2中的A点加载恒定幅值的交流信号(即驱动信号)，而在B点检测压力感应电极102的感应信号。
S302、在自容检测模式下根据加载的所述驱动信号和检测的所述感应信号，分别获得分压电容的输出电信号以及压力检测电容的输出电信号；
本实施例中，分压电容CS的输出电信号以及压力检测电容CM的输出电信号可以分别为分压电容CS的两端电压、压力检测电容CM的两端电压。
S303、根据所述分压电容的输出电信号和所述压力检测电容的输出电信号，确定所述压力感应电极在当前环境中受压时的压力特征数据。
本实施例中，步骤S303中根据所述分压电容CS的输出电信号和所述压力检测电容CM的输出电信号，确定所述压力感应电极102受压时的压力特征数据时具体可以包括：
S313、根据所述分压电容CS的输出电信号的信号值除以所述分压电容CS以及所述压力检测电容CM的输出电信号的信号值之和，确定第一分压比例；
具体地，可以通过公式(2)来计算第一分压比例Rate：
Figure PCTCN2017073243-appb-000003
式(2)中，CS表示所述分压电容的电容值，CM表示所述压力检测电容的电容值。
S323、根据所述第一分压比例确定所述压力感应电极在当前环境中受压时的压力特征数据。
进一步地，步骤S323中根据所述第一分压比例确定所述压力感应电极102受压时的压力特征数据时，可以具体包括：
S3231、根据所述第一分压比例确定所述分压电容CS的输出电信号的信号值和所述压力检测电容CM的输出电信号的信号值之间的比例；
S3232、根据所述分压电容CS的输出电信号的信号值和所述压力检测电容CM的输出电信号的信号值之间的比例确定所述压力感应电极102受压时的压力特征数据。
Figure PCTCN2017073243-appb-000004
公式(3)中，ForceData表示压力感应电极102在当前环境中受压时的压力特征数据。
在上述实施例的基础上，在计算出压力特征数据之后，还包括：根据所述压力感应电极102在当前环境中受压时的压力特征数据以及在当前环境中无按压时的基准压力特征数据确定所述压力特征数据对应的压力大小。
Figure PCTCN2017073243-appb-000005
公式(4)中，dM0为压力感应电极102到参考电极103的初始间距，εM为压力感应电极102到参考电极103之间电介质的等效介电常数，S为压力感应电极102与参考电极103之间的正对面积，k为所在电子终端中压力检测受压面的弹性模量，即将压力转换为形变量，单位为m/g，F为压力感应电极 102受压时的压力值。
将上述公式(4)带入公式(3)中即得公式(5)：
Figure PCTCN2017073243-appb-000006
由于压力特征数据ForceData已知，而对于公式(5)中来说，除压力值F外，其他均是整体已知或者可校准测量，因此，通过上述公式(5)即可计算出对应所述压力特征数据的压力值F。
图4为本申请实施例四中压力特征数据与压力值的关系示意图；如图4所示，参考上述公式(5)，由此可见，压力特征数据ForceData与压力值F成线性关系，当压力感应电极102和参考电极103出厂时的初始间距dM0发生变化，得到当前的初始距离d'M0，根据上述公式(5)，得到在当前环境中无按压时的基准压力特征数据ForceData'0：
Figure PCTCN2017073243-appb-000007
参照上述公式(5)得到出厂的初始间距发生后有按压时的压力特征数据ForceData'：
Figure PCTCN2017073243-appb-000008
通过上述公式(7)计算的ForceData'与ForceData'0做差获得特征数据差值ΔForceData：
Figure PCTCN2017073243-appb-000009
进一步地根据特征数据差值确定出受压时的压力值F。由此可见，在图3实施例的基础上，通过计算压力特征数据差值的方式计算出压力值F时，体现初始距离影响的基准压力特征数据相互抵消，从而压力值F不受初始距离变化的影响，即实现了对初始间距(GAP)的自校准。
图5为本申请实施例五中压力检测方法的流程示意图；如图5所示，本实施例中，以环境中温度或者湿度的影响压力特征数据为例进行说明，具体地，其包括如下步骤：
S501、获得驱动电极与压力感应电极之间形成的分压电容的输出电信号受环境影响的变化因子；
本实施例中，驱动电极101与压力感应电极102之间的间隙、正对面积和电介质的介电常数受环境中温度、湿度的影响从而发生变化，而变化会直接反应在分压电容CS的输出电信号上，因此，通过测量当前环境中的分压电容CS的实时输出信号与预设固定环境下的分压电容CS的基准输出电信号的比例，从而计算出分压电容CS的输出电信号受环境影响的变化因子。
具体地，结合上述公式(5)进行说明，分压电容CS的输出电信号受环境影响的变化因子λCS计算公式如(9)：
Figure PCTCN2017073243-appb-000010
其中CS0是分压电容在预设固定环境如出厂环境下的基准耦合电容，CST是分压电容在实时环境下的耦合电容，推而广之即通过分压电容CS在预设固定环境下的基准输出电信号以及在当前环境下的实时输出点信号，来确定分压电容CS的输出电信号受环境影响的变化因子λCS，需要说明的是，在确定受环境影响的变化因子时，可以在压力感应电极受压情形下确定，也可以在压力感应电极不受压的情形 下确定，详细不再赘述。
本实施例中，在确定上述基准输出电信号或者实时输出电信号时，可以在对应地预设固定环境中或者对应地当前环境中通过在驱动电极101上加载驱动信号，检测压力感应电极102的感应信号，在互容检测模式，从而确定基准输出电信号、当前环境下的实时输出信号，进而当前环境下的实时输出信号与分压电容CS在预设固定环境下的基准输出电信号相比，确定分压电容CS的输出电信号受环境影响的变化因子λCS。
S502、根据分压电容的输出电信号受环境影响的变化因子获得所述压力检测电容的输出电信号受环境影响的变化因子；
参见步骤S502，驱动电极101与压力感应电极102之间电介质的介电常数受环境中温度、湿度的影响从而发生变化，同理，压力感应电极102与参考电极103之间电介质的介电常数受环境影响也会发生变化。通过步骤S501中确定出的分压电容CS的输出电信号受环境影响的变化因子可对所述压力检测电容CM的输出电信号受环境影响的变化因子进行校准，从而可实现将所述分压电容CS可作为一环境传感器，通过该环境传感器来确定环境变化对压力检测电容CM变化的影响。
本实施例中，预先通过材料试验，建立分压电容CS的输出电信号受环境影响的变化因子与所述压力检测电容CM的输出电信号受环境影响的变化因子之间的关系，再根据上述步骤S501中计算出分压电容CS的输出电信号受环境影响的变化因子从而确定所述压力检测电容CM的输出电信号受环境影响的变化因子λεM。
S503、根据分压电容的输出电信号受环境影响的变化因子以及压力检测电容的输出电信号受环境影响的变化因子确定压力特征数据受环境影响的变化因子；
本实施例中，通过计算分压电容CS的输出电信号受环境影响的变化因子与压力检测电容CM的输出电信号受环境影响的变化因子之间的比值，从而确定出压力特征数据受环境影响的变化因子。
具体如下述公式(10)所示，压力特征数据受环境影响的变化因子λ：
Figure PCTCN2017073243-appb-000011
S504、根据压力特征数据受环境影响的变化因子以及所述分压电容的输出电信号和所述压力检测电容的输出电信号，确定所述压力感应电极在当前环境下受压时的压力特征数据；
本实施例中，参见上述公式(5),当受压时受环境影响时的压力特征数据ForceData'如公式(11)所示：
Figure PCTCN2017073243-appb-000012
公式(11)在图6中虚线所示，斜率为
Figure PCTCN2017073243-appb-000013
公式(5)在图6中实线所示，斜率为
Figure PCTCN2017073243-appb-000014
在另一实施例中，可替代地，还可以根据所述分压电容受环境影响的变化因子获得所述压力检测电容受环境影响的变化因子，根据所述压力检测电容受环境影响的变化因子校准所述压力检测电容的输出电信号，从而可以根据所述分压电容校准后的输出电信号和所述压力检测电容校准后的输出电信号，确定所述压力感应电极在当前环境下受压时的压力特征数据。需要说明的是，在另外一实施例中，如果环境对压力检测电容没有影响，则可以不对分压电容和压力检测电容的输出电信号进行校准，详细不再赘述。
S505、根据受压时在当前环境中的压力特征数据以及无按压时在当前环境中的基准压力特征数据确定在当前环境受压时对应的压力值。
本实施例中，可以通过下述公式(12)计算当前环境中的压力特征数据差值ΔForceData'
Figure PCTCN2017073243-appb-000015
对上述公式(12)变形得到公式(13)，根据公式(13)计算在当前环境下受压时的压力值F：
Figure PCTCN2017073243-appb-000016
由公式(13)可见，通过压力特征数据受环境影响的变化因子λ从而对压力特征数据差值ΔForceData'进行校准，从而计算出压力值F，详细可参见图6，图6为本申请实施例六中受环境影响时实施压力特征数据的曲线示意图。
图7为本申请实施例七中压力检测装置的结构示意图；如图7所示，在上述图1实施例的基础上，负载电极104(例如Vcom层)与压力感应电极102的边缘之间仍会残留少部分负载电容CL，该负载电容CL的存在会对实时压力检测性能带来影响，为此，参照图8，图8为本申请实施例八中压力检测装置的结构示意图。如图8所示，为消除图7所示负载电容CL影响，在图8所示实施例中，驱动电极101的面积大于压力感应电极的面积并覆盖住所述压力感应电极，以屏蔽图7中的负载电容CL。参照图9，图9为本申请实施例九中压力检测装置的电场分布示意图，在图9中，由于驱动电极101的面积大于压力感应电极102，因此，压力感应电极102的边缘和Vcom层之间形成如图7中所示的负载电容CL极小，对压力检测性能的影响可以忽略。
上述确定压力特征数据以及对应压力值的方法实施例同样也可以适用于图8所示的压力检测装置叠层结构示意图，详细不再赘述。
图10为本申请实施例十中压力检测装置的结构示意图；如图10所示，本实施例中，压力感应电极102的面积大于驱动电极101的面积，因此，压力感应电极102与负载电极104如Vcom层之间形成了负载电容CL。除此之外，压力感应电极102与驱动电极101之间形成分压电容CS，压力感应电极102与参考电极103之间形成压力检测电容CM，驱动电极101与负载电极104如Vcom层形成了环境检测电容CV。
图11为本申请实施例十一中压力检测装置的等效电路结构示意图；如图11所示，对于图10所示的压力检测装置建立的等效电路结构，压力检测电容CM与负载电容CL并联后再与分压电容CS串联，由于驱动电极的低输出阻抗，环境检测电容CV几乎对驱动信号无影响。
另外，需要说明的是，图10仅是形成负载电容的一示例性结构，比如在图7的结构中也可能形成负载电容，可以参照上述图11的等效电路结构，详细不再赘述。
对于上述图7或者图10示例性的存在负载电容的结构，压力特征数据的确定可参见图12。
图12为本申请实施例十二中压力检测方法的流程示意图；如图12所示，其包括：
S1201、根据向所述驱动电极电连接的驱动信号以及检测到的所述压力感应电极输出的感应信号，以分别获得驱动电极与压力感应电极之间形成的分压电容的输出电信号、所述压力感应电极与参考电极之间形成的压力检测电容的输出电信号、所述压力感应电极与所述负载电极形成的负载电容的输出电信号；
本实施例中，向驱动电极101加载驱动信号以及通过从压力感应电极102输出的感应信号获得各个 电容的输出电信号，类似上述图1实施例对应的检测方法，在此不再赘述。
S1202、根据向所述压力感应电极加载的驱动信号以及检测到的所述驱动电极输出的感应信号，以分别获得驱动电极与压力感应电极之间形成的分压电容的输出电信号、所述驱动电极与所述负载电极之间形成的环境检测电容的输出电信号。
本实施例中，向压力感应电极102加载驱动信号以及通过驱动电极101输出的感应信号，获得各个电容的输出电信号类似步骤S1201中。
S1203、根据步骤S1201中的所述分压电容的输出电信号与所述压力检测电容、所述负载电容以及所述分压电容的输出电信号之和的比例，计算第一压力原始特征数据；
本实施例中，图13为本申请实施例十三中压力检测装置的一电场示意图；电场具体可以通过公式(14)分别计算出分压电容CS的输出电信号与所述压力检测电容CM、所述负载电容以及所述分压电容CS的输出电信号之和的比例Rate1以及第一压力原始特征数据RawData1。
Figure PCTCN2017073243-appb-000017
Figure PCTCN2017073243-appb-000018
S1204、根据步骤S1202中分压电容的输出电信号与所述环境检测电容与分压电容的输出电信号之和的比例，计算第二压力原始特征数据；
本实施例中，图14为本申请实施例十四中压力检测装置的另一电场示意图；具体可以通过公式(15)分别计算出所述环境检测电容CV的输出电信号的信号值除以所述环境检测电容CV与分压电容CS的输出电信号的信号值之和确定第二分压比例Rate2以及第二压力原始特征数据RawData2，第二压力原始特征数据等同于在当前环境中的环境特征数据。公式(15)中，所述环境检测电容CV的输出电信号具体为电压信号UCV，分压电容CS的输出电信号具体为UCS。
Figure PCTCN2017073243-appb-000019
Figure PCTCN2017073243-appb-000020
Figure PCTCN2017073243-appb-000021
Figure PCTCN2017073243-appb-000022
本实施例中，在步骤S1204中，根据分压电容CS的输出电信号的信号值与所述环境检测电容CV、所述分压电容CS的输出电信号的信号值之和得到第二比例，计算第二压力原始特征数据时，可以根据负载电容CL与所述环境检测电容CV的比例关系，以及所述环境检测电容CV的输出电信号，确定所述负载电容CL的输出电信号。
S1205、根据所述第一压力原始特征数据和第二压力原始特征数据，确定所述压力感应电极在当前环境中受压时的压力特征数据。
本实施例中，由于在实际产品中，驱动电极101、压力感应电极102距离负载电极104如Vcom层距离近似相等，且驱动电极101、压力感应电极102与负载电极104之间的介电常数大致相等，因此，表现在电容值的不同上，主要由于驱动电极101、压力感应电极102分别与负载电极104的正对面积不同导致，进而使得环境检测电容CV与负载电容CL之间具有固定的比例关系如(16)所示：
CL＝ηCV  (16)
通过在上述公式(15)中的RawData2的算式两端乘以η，再根据下述公式(17)计算压力特征数据ForceData”。
Figure PCTCN2017073243-appb-000023
再将上述公式(4)带入公式(17)中即得公式计算压力特征数据ForceData”的公式(18)。
Figure PCTCN2017073243-appb-000024
进一步地，为确定压力特征数据对应的压力值，在上述公式(18)中，令F＝0，即得未受压时的基准压力特征数据ForceData″0，当有受压时，通过上述第一压力原始特征数据和第二压力原始特征数据确定出压力特征数据ForceData”与基准压力特征数据ForceData″0做差即可得到类似上述公式(8)，从而根据类似上述公式(8)的公式，计算出压力值F。
对于类似上述存在负载电容的情形，初始距离自校准以及环境自校准的以及信噪比的说明，可参见上述针对图1的检测方法说明，详细不再赘述。
图15为本申请实施例十五中压力检测装置的叠层结构示意图；图16为本申请实施例十六中压力检测装置的电场示意图；如图15、16所示，驱动电极101的面积大于压力感应电极102，与此同时，如考虑到此时压力感应电极102的走线与负载电极104如Vcom层之间还会存在负载电容。为此，本实施例中，在压力感应电极102的走线与负载电极104如Vcom层再增加一层屏蔽电极105，用于屏蔽所述压力感应电极102的走线与所述负载电极104之间形成负载电容CL，所述屏蔽电极105设置在所述压力感应电极的走线与所述负载电极之间，所述屏蔽电极105可以与所述驱动电极101设置在同一层，也可以上下错位设置。在向所述驱动电极101加载驱动信号时，一并加载到所述屏蔽电极105上，分别获得驱动电极101、屏蔽电极105分别与压力感应电极102之间形成的分压电容CS的输出电信号以及压力感应电极102与参考电极103之间形成的压力检测电容CM的输出电信号。
如图16所示，所述驱动电极101和所述屏蔽电极105电连接至驱动信号时，驱动电极101与负载电极104形成环境检测电容CV1，屏蔽电极105与负载电极104形成环境检测电容CV2，压力感应电极102及其走线分别与参考电极103形成压力检测电容CM1与CM2，驱动电极101与压力感应电极102之间形成分压电容CS1，屏蔽电极105与压力感应电极102的走线之间形成分压电容CS2，环境检测电容CV1和环境检测电容CV2的加和等于上述实施例中的环境检测电容CV，并不参与压力特征数据的确定，分压电容CS1与分压电容CS2的加和等于上述确定压力特征数据公式中的分压电容CS，压力检测电容CM1与压力检测电容CM2的加和等于上述确定压力特征数据公式中的CM。
具体地，本实施例中，所述驱动电极101电连接至驱动信号时，一并加载到所述屏蔽电极105上，可以根据驱动电路的驱动能力，比如驱动电路中，如果单个驱动通道的驱动能力较强，可以使用一个驱动通道同时给驱动电极101和屏蔽电极105加载同一驱动信号；或者，如果单个驱动通道的驱动能力较弱，可以使用两个驱动通道，分别给驱动电极101和屏蔽加载具有相同属性(频率、幅值、相位等)的 驱动信号。
另外，若单个驱动通道的驱动能力足以同时驱动多个驱动电极101和多个屏蔽电极105，则可以使用一个驱动通道向多个驱动电极101和多个屏蔽电极105加载驱动信号，从而尽可能的减少驱动通道的数量。
再者，可替代地，在其他实施例中，可以将驱动电极101和屏蔽电极105设置在同一层，由于驱动电极101和屏蔽电极105加载同一驱动信号，为此，还可以直接将驱动电极101和屏蔽电极105连通，再使用一驱动通道向驱动电极101和屏蔽电极105加载驱动信号。
对于图15所示的压力检测装置也可以对应有类似上述对1的压力检测方法以及确定压力值的方案，详细不再赘述。
图17为本申请实施例十七中压力检测装置的平面示意图；图18为本申请实施例十八中压力检测装置的平面示意图；图17和图18中，为了清楚的显示屏蔽电极105与走线的设置示意图，省略了其他部件，详细不再赘述。
如图17所示，对于每一个压力感应电极102的走线对应设置一个屏蔽电极105，多个屏蔽电极105共用一个驱动通道，多个驱动电极101可以共用一个驱动通道，屏蔽电极105和驱动电极101之间还可以共用一个驱动通道。
如图18所示，通过设置一个面积大于驱动电极101，从而使得驱动电极101同时与压力感应电极102及其走线形成分压电容CS，压力感应电极102及其走线与参考电极103形成压力检测电容CM。
图19为本申请实施例十九中压力检测装置的叠层示意图；如图19所示，本实施例中，驱动电极101的面积小于压力感应电极102的面积，此时压力感应电极102与负载电极104如Vcom层形成负载电容CL。另外，如考虑驱动电极101的走线与参考电极103形成的环境干扰电容的存在，并消除其对环境特征数据带来的影响。本实施例中，在驱动电极101的走线与参考电极103之间设置屏蔽电极105，该屏蔽电极105用于屏蔽所述驱动电极101的走线与所述参考电极103之间形成的环境干扰电容，屏蔽电极105设置在所述驱动电极101的走线与所述参考电极103之间，所述屏蔽电极105可以与压力感应电极102设置在同一层，也可以上下错位设置。本实施例中，屏蔽电极105和压力感应电极102可以位于同一层。
图20为本申请实施例二十中压力检测装置的一电场示意图；图21为本申请实施例二十一中压力检测装置的另一电场示意图；图20、图21为对应上述图19的电场示意图。参照上述存在负载电容CL的实施例，为了消除负载电容CL的影响，对驱动电极101加载驱动信号，并使得屏蔽电极105处于悬浮状态，分别检测压力感应电极102的感应信号；在对压力感应电极102和屏蔽电极105加载驱动信号，检测驱动电极101的感应信号。
具体地，当所述屏蔽电极105处于悬浮状态时，再根据向所述驱动电极101加载的驱动信号以及检测到的所述压力感应电极102输出的感应信号，以分别获得驱动电极101与压力感应电极102之间形成的分压电容CS的输出电信号、所述压力感应电极102与参考电极103之间形成的压力检测电容CM的输出电信号、所述压力感应电极102与所述负载电极104形成的负载电容CL的输出电信号；
根据所述压力感应电极102与所述屏蔽电极105电连接的驱动信号以及检测到的所述驱动电极101输出的感应信号，以分别获得驱动电极101及其走线分别与压力感应电极102和所述屏蔽电极105之间形成的分压电容CS的输出电信号，以及所述驱动电极101及其走线与所述负载电极104之间形成的环境检测电容CV的输出电信号。
本实施例中，由于屏蔽电极105的存在，在向驱动电极101加载驱动信号时，屏蔽电极105处于悬 浮状态；而当向压力感应电极102加载驱动信号时，同时向屏蔽电极105加载同一驱动信号。
图20和图21中，环境检测电容CV1和环境检测电容CV2求和得到确定压力特征数据公式中的环境检测电容CV，分压电容CS1和分压电容CS2求和得到确定压力特征数据公式中的分压电容CS，压力检测电容CM1和压力检测电容CM1求和得到确定压力特征数据公式中的压力检测电容CM。将此处得到的CV、CS、CM、CL带入上述公式(14)、(15)中从而计算出压力特征数据。还可以根据公式(8)进而确定出压力值F。
图22为本申请实施例二十二中压力检测装置的平面示意图；如图22所示，对于图19所示的压力检测装置叠层示意图，为了清楚地显示驱动电极101、压力感应电极102、屏蔽电极105的关系，省略了其他相关部件，每个针对每个压力感应电极102的走线设置了一个屏蔽电极105，多个屏蔽电极105之间可以共用同一驱动通道，也可以单独设置有不同的驱动通道，压力感应电极102和屏蔽电极105可以共用同一驱动通道，也可以单独设置有不同的驱动通道，具体可以根据驱动通道的驱动能力来设置。
在其他实施例中，还可以通过设置面积较大的压力感应电极102，从而使得压力感应电极102同时起到本实施例中屏蔽电极105的技术作用，以下不再赘述。
图23为本申请实施例二十三中压力检测装置的应用示例结构示意图；如图23所示，在实际应用时，可以将上述实施例中驱动电极101和压力感应电极102等制成一感应器(sensor)100，同时复用压力检测装置所在电子终端的导电中框作为其中的参考电极103，以形成上述压力检测装置。感应器100中压力感应电极和导电中框之间设置下泡棉109等填充物。下玻璃107和上玻璃106之间存在Vcom层，Vcom层之上依次为上玻璃106以及盖板110。
而在感应器100和下玻璃107之间设置的上泡棉108等填充物，尽量实现将用户按压形变无损传递给感应器100。
图24为本申请实施例二十四中压力检测装置的应用示例结构示意图；如图24所示，与上述图23实施例不同的是，在感应器100中的压力感应电极和导电中框之间设置下泡棉109并使得该下泡棉109与导电中框具有空气间隙，从而增加受压时压力感应电容的形变量。
图25为本申请实施例二十五中压力检测装置的应用示例结构示意图；如图25所示，与上述图24实施例不同的是，省略了感应器100和下玻璃107之间设置上泡棉108等填充物，同时将感应器100直接设置在下玻璃107的下表面上，即所述压力感应电极和驱动电极夹设在可随所述压力发生变化形变的填充物如上泡棉与近似不随压力发生变化的基材如下玻璃之间。所述驱动电极与所述压力感应电极之间填充物还可做镂空处理成镂空，以调整比如减小所述驱动电极与所述压力感应电极之间形成的分压电容的大小。
图26为本申请实施例二十六中压力检测装置的应用示例结构示意图；如图26所示，与上述图25实施例不同的是，在感应器100和导电中框之间设置下泡棉109并使得该下泡棉109与导电中框保持一个空气间隙，从而增加受压时压力感应电容的形变量。
上述图23-26的应用示例结构示意图中，感应器可以包括上下两层电极即：驱动电极和压力感应电极。此时，通过驱动电极避免了现有技术中Vcom层与压力感应电极之间的负载电容，在确定压力特征数据时从而消除负载电容。
另外，需要说明的是，上述具有两层电极的结构中，也可以复用压力感应电极之上的其他可导电的金属层如负载电极作为驱动电极，从而直接避免了负载电容的形成，同样达到了在确定压力特征数据时消除了负载电容。如果复用其他金属层作为驱动电极的话，则上述感应器中的电极只有一层电极即：压力感应电极。
图27为本申请实施例二十七中压力检测装置的应用示例结构示意图；本实施例中，由于存在光学组件111以及依次位于光学组件111之上的下玻璃107、Vcom层、上玻璃106、盖板110，因此会存在一金属背壳，将该金属背壳作为与负载电极104，而其中的Vcom层作为参考电极103，该Vcom层与感应器100中压力感应电极102之间具有空气间距，从而形成压力检测电容CM。
图28为本申请实施例二十八中压力检测装置的应用示例结构示意图；本实施例中，中框作为参考电极103，感应器100中压力感应电极102与中框之间具有可压缩的柔性胶以形成压力检测电容CM。另外，由于还存在用于感应触控操作的触控感应阵列113，因此，驱动电极101可以复用触控感应器113中的电极。压力感应电极102和驱动电极101都位于压力检测装置所在电子装置的有效显示区域外围。
图29为本申请实施例二十九中压力检测装置的应用示例结构示意图；如图29所示，本实施例中，对于由于设置虚拟按键而设置对应虚拟按键电极115的情形，驱动电极101可以复用虚拟按键电极115。
图30为本申请实施例三十中压力检测装置的应用示例性结构示意图；如图30所示，本实施例中，感应器100包括的电极为压力感应电极102，而感应器100中驱动电极101复用负载电极104如Vcom层，通过分时控制，从而同时Vcom层一方面可以用作驱动电极101，另外一方面可以起到类似现有技术中Vcom层相同的作用。
图31为本申请实施例三十一中压力检测装置的应用示例性结构示意图；如图31所示，与上述图30不同的是，设置类似图20的空气间隙。
参见上述相关实施例，所述驱动电极和所述压力感应电极的形状均为矩形；或者，所述驱动电极的形状为圆形，所述压力感应电极的形状为矩形。
本申请实施例还提供了一种电子终端，其可以包括上述任一实施例中的压力检测装置。该电子终端具体可以是手表、平板电脑、触控板、压力计或者手机等。
本申请的实施例所提供的装置可通过计算机程序实现。本领域技术人员应该能够理解，上述的单元以及模块划分方式仅是众多划分方式中的一种，如果划分为其他单元或模块或不划分块，只要信息对象的具有上述功能，都应该在本申请的保护范围之内。
本领域的技术人员应明白，本申请的实施例可提供为方法、装置(设备)、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请实施例的方法、装置(设备)和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程 设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本申请的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本申请范围的所有变更和修改。显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (29)

  1. 一种压力检测方法，其特征在于，包括：
    获得驱动电极与压力感应电极之间形成的分压电容的输出电信号，以及所述压力感应电极与参考电极之间形成的压力检测电容的输出电信号，所述压力感应电极与所述参考电极之间具有可随所述压力发生变化的间隙；
    根据所述分压电容的输出电信号和所述压力检测电容的输出电信号，确定所述压力感应电极受压时的压力特征数据。
  2. 根据权利要求1所述的方法，其特征在于，所述驱动电极电连接驱动信号，所述压力感应电极输出与所述驱动信号耦合的感应信号，在自容检测模式下分别获得所述分压电容的输出电信号以及所述压力检测电容的输出电信号。
  3. 根据权利要求1所述的方法，其特征在于，根据所述分压电容的输出电信号和所述压力检测电容的输出电信号，确定所述压力感应电极受压时的压力特征数据包括：根据所述压力检测电容的输出电信号的信号值除以所述分压电容与所述压力检测电容的输出电信号的信号值之和，以确定第一分压比例；根据所述第一分压比例确定所述压力感应电极受压时的压力特征数据。
  4. 根据权利要求1所述的方法，其特征在于，还包括：根据所述压力感应电极在当前环境中受压时的压力特征数据以及在当前环境中无按压时的基准压力特征数据确定所述压力特征数据对应的压力大小。
  5. 根据权利要求1所述的方法，其特征在于，获得驱动电极与压力感应电极之间形成的分压电容的输出电信号包括：所述驱动电极电连接驱动信号，且所述压力感应电极输出与所述驱动信号耦合的感应信号，在互容检测模式下单独检测所述驱动电极与所述压力感应电极之间形成的分压电容的输出电信号。
  6. 根据权利要求5所述的方法，其特征在于，获得驱动电极与压力感应电极之间形成的分压电容的输出电信号包括：获得在预设固定环境下的所述分压电容的基准输出电信号；获得在当前环境下的所述分压电容的实时输出电信号；根据所述实时输出电信号除以所述基准输出电信号得到所述分压电容的输出电信号受环境影响的变化因子；
    根据所述分压电容受环境影响的变化因子校准所述分压电容的输出电信号，以根据所述分压电容校准后的输出电信号和所述压力检测电容的输出电信号，确定所述压力感应电极受压时的压力特征数据。
  7. 根据权利要求6所述的方法，其特征在于，获得压力感应电极与参考电极之间形成的压力检测电容的输出电信号包括：根据所述分压电容受环境影响的变化因子获得所述压力检测电容受环境影响的变化因子，根据所述压力检测电容受环境影响的变化因子校准所述压力检测电容的输出电信号；或者，根据分压电容的输出电信号受环境影响的变化因子以及压力检测电容的输出电信号受环境影响的变化因子确定压力特征数据受环境影响的变化因子；
    对应地，根据所述分压电容的输出电信号和所述压力检测电容的输出电信号，确定所述压力感应电极受压时的压力特征数据包括：根据所述分压电容校准后的输出电信号和所述压力检测电容校准后的输出电信号，确定所述压力感应电极受压时的压力特征数据；或者，根据压力特征数据受环境影响的变化因子以及所述分压电容的输出电信号和所述压力检测电容的输出电信号，确定所述压力感应电极受压时的压力特征数据。
  8. 根据权利要求1-7任一项所述的方法，其特征在于，所述驱动电极设置在所述压力感应电极与负载电极之间，所述驱动电极面积大于所述压力感应电极并完全覆盖住所述压力感应电极，以屏蔽 所述压力感应电极与所述负载电极形成的负载电容。
  9. 根据权利要求8所述的方法，其特征在于，还包括：屏蔽电极，所述屏蔽电极用于屏蔽所述压力感应电极的走线与所述负载电极之间形成的负载电容。
  10. 根据权利要求9所述的方法，其特征在于，所述驱动电极电连接至驱动信号，且所述屏蔽电极也一并电连接至所述驱动信号，以获得所述驱动电极、所述屏蔽电极分别与所述压力感应电极之间形成的分压电容的输出电信号，以及所述压力感应电极与所述参考电极之间形成的压力检测电容的输出电信号。
  11. 根据权利要求1-7任一项所述的方法，其特征在于，所述驱动电极面积小于所述压力感应电极，所述压力感应电极与负载电极形成负载电容，根据所述驱动电极电连接的驱动信号分别获得驱动电极与压力感应电极之间形成的分压电容的输出电信号、所述压力感应电极与参考电极之间形成的压力检测电容的输出电信号、所述压力感应电极与所述负载电极形成的负载电容的输出电信号。
  12. 根据权利要求11所述的方法，其特征在于，还包括：
    获得所述驱动电极与所述负载电极之间形成环境检测电容的输出电信号；
    根据所述环境检测电容的输出电信号的信号值除以所述分压电容的输出电信号与所述环境检测电容的输出电信号的信号值之和，确定第二分压比例，根据所述第二分压比例确定环境特征数据。
  13. 根据权利要求12所述的方法，其特征在于，根据所述分压电容的输出电信号和所述压力检测电容的输出电信号，确定所述压力感应电极受压时的压力特征数据包括：
    根据所述分压电容的输出电信号的信号值与所述压力检测电容、所述负载电容以及所述分压电容的输出电信号的信号值之和的比例，计算第一压力原始特征数据；
    将所述环境特征数据作为所述第二压力原始特征数据，并根据所述第一压力原始特征数据和第二压力原始特征数据，确定所述压力感应电极受压产生的压力特征数据。
  14. 根据权利要求12所述的方法，其特征在于，根据所述负载电容和所述环境检测电容的电容值存在的比例关系，以及所述环境检测电容的输出电信号，确定所述负载电容的输出电信号。
  15. 根据权利要求11所述的方法，其特征在于，还包括：屏蔽电极，用于屏蔽所述驱动电极的走线与所述参考电极之间形成的环境干扰电容。
  16. 根据权利要求15所述的方法，其特征在于，所述屏蔽电极处于悬浮状态时，根据所述驱动电极电连接的驱动信号以及检测到的所述压力感应电极输出的感应信号，以分别获得所述驱动电极与所述压力感应电极之间形成的分压电容的输出电信号、所述压力感应电极与所述参考电极之间形成的压力检测电容的输出电信号、所述压力感应电极与所述负载电极形成的负载电容的输出电信号；
    根据所述压力感应电极与所述屏蔽电极电连接的驱动信号以及检测到的所述驱动电极输出的感应信号，以分别获得所述驱动电极分别与所述压力感应电极和所述屏蔽电极之间形成的分压电容的输出电信号，以及所述驱动电极与所述负载电极之间形成的环境检测电容的输出电信号。
  17. 一种压力检测装置，其特征在于，包括驱动电极、压力感应电极、参考电极，所述驱动电极与所述压力感应电极之间形成分压电容，所述压力感应电极与所述参考电极之间形成压力检测电容，所述压力感应电极与所述参考电极之间具有可随所述压力发生变化的间隙，所述分压电容和所述压力检测电容分别产生用于确定所述压力感应电极受压时的压力特征数据的输出电信号。
  18. 根据权利要求17所述的装置，其特征在于，所述驱动电极电连接至驱动信号，所述压力感应电极输出与所述驱动信号耦合的感应信号，在自容检测模式下所述分压电容和所述压力检测电容在所述压力感应电极受压时分别产生对应的输出电信号。
  19. 根据权利要求17所述的装置，其特征在于，所述驱动电极电连接至驱动信号，所述压力感应电极输出与所述驱动信号耦合的感应信号，在互容检测模式下所述分压电容在所述压力感应电极受压时产生对应的输出电信号。
  20. 根据权利要求17-19任一项所述的装置，其特征在于，所述驱动电极设置在所述压力感应电极与负载电极之间，所述驱动电极面积大于所述压力感应电极并完全覆盖住所述压力感应电极,以屏蔽所述压力感应电极与所述负载电极形成的负载电容。
  21. 根据权利要求20所述的装置，其特征在于，还包括用于屏蔽所述压力感应电极的走线与所述负载电极之间形成的负载电容的屏蔽电极，所述屏蔽电极设置在所述压力感应电极的走线与所述负载电极之间。
  22. 根据权利要求17-19任一项所述的装置，其特征在于，所述驱动电极面积小于所述压力感应电极的面积，使得所述压力感应电极与所述负载电极形成负载电容。
  23. 根据权利要求22所述的装置，其特征在于，还包括用于屏蔽所述驱动电极的走线与所述参考电极之间形成的环境干扰电容的屏蔽电极，所述屏蔽电极设置在所述驱动电极的走线与所述参考电极之间。
  24. 根据权利要求20所述的装置，其特征在于，所述驱动电极复用压力检测装置所在电子装置中显示模组的公共电极，或者，所述驱动电极设置在所述压力感应电极和负载电极之间；或者，所述驱动电极复用压力检测装置所在电子装置的触控感应阵列中的电极。
  25. 根据权利要求17所述的装置，其特征在于，所述参考电极为压力检测装置所在电子终端的导电中框；或者，所述参考电极为压力检测装置所在电子终端的导电背壳；或者，所述参考电极为压力检测装置所在电子终端的显示模组的公共电极。
  26. 根据权利要求17所述的装置，其特征在于，所述驱动电极与所述压力感应电极之间填充物呈镂空状，以调整所述驱动电极与所述压力感应电极之间形成的分压电容的大小。
  27. 根据权利要求17所述的装置，其特征在于，所述驱动电极与所述压力感应电极设置在压力检测装置所在电子装置的有效显示区域的外围。
  28. 根据权利要求17所述的装置，其特征在于，所述驱动电极和所述压力感应电极的形状均为矩形；或者，所述驱动电极的形状为圆形，所述压力感应电极的形状为矩形。
  29. 一种电子终端，其特征在于，包括上述权利要求17-28任一项所述的压力检测装置。
PCT/CN2017/073243 2017-02-10 2017-02-10 压力检测方法及其装置以及电子终端 Ceased WO2018145299A1 (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201780000681.3A CN107278285B (zh) 2017-02-10 2017-02-10 压力检测方法及其装置以及电子终端
EP17851946.8A EP3379393B1 (en) 2017-02-10 2017-02-10 Pressure detection method, device and electronic terminal thereof
PCT/CN2017/073243 WO2018145299A1 (zh) 2017-02-10 2017-02-10 压力检测方法及其装置以及电子终端
US15/937,832 US10540037B2 (en) 2017-02-10 2018-03-27 Force detection method and apparatus, and electronic terminal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/073243 WO2018145299A1 (zh) 2017-02-10 2017-02-10 压力检测方法及其装置以及电子终端

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/937,832 Continuation US10540037B2 (en) 2017-02-10 2018-03-27 Force detection method and apparatus, and electronic terminal

Publications (1)

Publication Number Publication Date
WO2018145299A1 true WO2018145299A1 (zh) 2018-08-16

Family

ID=60076518

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/073243 Ceased WO2018145299A1 (zh) 2017-02-10 2017-02-10 压力检测方法及其装置以及电子终端

Country Status (4)

Country Link
US (1) US10540037B2 (zh)
EP (1) EP3379393B1 (zh)
CN (1) CN107278285B (zh)
WO (1) WO2018145299A1 (zh)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI581169B (zh) * 2016-04-28 2017-05-01 友達光電股份有限公司 雙模式電容觸控顯示面板
JP6388101B1 (ja) * 2017-03-15 2018-09-12 三菱電機株式会社 タッチパネルおよびタッチパネルを備える表示装置
TWI641819B (zh) * 2017-09-07 2018-11-21 宏碁股份有限公司 壓力感測器以及壓力感測方法
CN110678766B (zh) * 2018-03-14 2021-10-26 深圳市汇顶科技股份有限公司 感应模组的检测方法、触控芯片、触摸屏及其组装方法
CN110347276B (zh) * 2018-04-04 2023-05-12 上海和辉光电股份有限公司 一种柔性显示面板及显示装置
WO2020137009A1 (ja) * 2018-12-27 2020-07-02 株式会社ジャパンディスプレイ 押力センサ及び表示装置
CN109491550B (zh) * 2019-01-03 2022-05-10 京东方科技集团股份有限公司 一种触控基板及其检测方法、显示装置
EP3709139B1 (en) 2019-01-29 2022-08-31 Shenzhen Goodix Technology Co., Ltd. Pressure calculation method and apparatus using same, electronic device, and touch system
CN110401905B (zh) * 2019-07-30 2021-06-11 Oppo广东移动通信有限公司 电子设备、显示面板及其发声装置
CN110427126B (zh) * 2019-08-07 2020-11-03 北京航空航天大学 一种压力信号的校正方法及装置
CN111459345A (zh) * 2020-03-18 2020-07-28 精电(河源)显示技术有限公司 一种触控屏及三维触控检测方法
CN120446613B (zh) * 2025-07-14 2025-09-30 国网山西省电力公司太原供电公司 一种自校准型验电器的自适应调节方法、系统及介质

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105446538A (zh) * 2015-10-29 2016-03-30 深圳市汇顶科技股份有限公司 一种压力检测结构及触摸设备
CN105807991A (zh) * 2016-03-03 2016-07-27 京东方科技集团股份有限公司 一种显示基板、内嵌式触摸屏、其驱动方法及显示装置

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8730199B2 (en) * 2009-09-04 2014-05-20 Atmel Corporation Capacitive control panel
JP6256369B2 (ja) * 2015-02-09 2018-01-10 ソニー株式会社 センサ、入力装置、キーボードおよび電子機器
US9612685B2 (en) * 2015-04-09 2017-04-04 Microsoft Technology Licensing, Llc Force-sensitive touch sensor compensation
US10345947B2 (en) * 2015-05-27 2019-07-09 Melfas Inc. Apparatus and method for detecting hovering object, switching matrix, apparatus for determining compensation capacitance, method of compensating for force sensing capacitance, and apparatus for detecting force input
CN105675178A (zh) * 2015-12-31 2016-06-15 联想(北京)有限公司 一种具有压力检测功能的电子设备以及压力检测方法
CN205384592U (zh) * 2016-01-25 2016-07-13 深圳市汇顶科技股份有限公司 压力检测装置、触控设备及电子终端
CN105511687B (zh) * 2016-01-29 2018-03-23 京东方科技集团股份有限公司 压力感应结构、压力感应面板及压力感应显示装置
CN105700753B (zh) * 2016-03-03 2018-11-30 京东方科技集团股份有限公司 压力检测单元、压力检测方法和显示面板
CN205809842U (zh) * 2016-06-15 2016-12-14 深圳市汇顶科技股份有限公司 压力检测装置、触控设备及电子终端
KR102542983B1 (ko) * 2016-06-27 2023-06-15 삼성디스플레이 주식회사 터치 센서 및 이를 포함하는 표시 장치
JP6682398B2 (ja) * 2016-08-02 2020-04-15 株式会社ジャパンディスプレイ 力検出装置、表示装置及び有機エレクトロルミネッセンス表示装置
TWI605369B (zh) * 2016-08-31 2017-11-11 晨星半導體股份有限公司 互容式壓力感測器以及具有壓力感測功能之觸控顯示裝置與其壓力感測方法
CN206388153U (zh) * 2016-09-14 2017-08-08 深圳市汇顶科技股份有限公司 压力检测装置及电子终端

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105446538A (zh) * 2015-10-29 2016-03-30 深圳市汇顶科技股份有限公司 一种压力检测结构及触摸设备
CN105807991A (zh) * 2016-03-03 2016-07-27 京东方科技集团股份有限公司 一种显示基板、内嵌式触摸屏、其驱动方法及显示装置

Also Published As

Publication number Publication date
CN107278285B (zh) 2019-04-12
CN107278285A (zh) 2017-10-20
EP3379393B1 (en) 2019-12-18
EP3379393A1 (en) 2018-09-26
US10540037B2 (en) 2020-01-21
US20180232096A1 (en) 2018-08-16
EP3379393A4 (en) 2018-09-26

Similar Documents

Publication Publication Date Title
WO2018145299A1 (zh) 压力检测方法及其装置以及电子终端
CN205302239U (zh) 一种压力检测结构及触摸设备
TWI605369B (zh) 互容式壓力感測器以及具有壓力感測功能之觸控顯示裝置與其壓力感測方法
CN104615315B (zh) 触摸感测系统及其驱动方法
TWI534676B (zh) 觸控感測系統及其驅動方法
EP3293617B1 (en) Touch sensor, touch detection apparatus and detection method, and touch control device
EP3457258B1 (en) Pressure detection apparatus and method, touch control device and electronic terminal
CN103329074B (zh) 用于使用所估计偏转响应来确定物体信息的系统和方法
CN107436694B (zh) 具有沿轴的均匀响应的力传感器
WO2014080924A1 (ja) 近接・接触センサ
US20160370909A1 (en) Adaptive force sensing
CN105549791B (zh) 一种具有压力感应和触控功能的显示面板
US20160026216A1 (en) Capacitive sensors for grip sensing and finger tracking
CN105511670A (zh) 一种具有压力检测功能的触控屏及电子设备
WO2015154570A1 (zh) 触摸屏感应方法和装置
WO2017214857A1 (zh) 便携式电子设备及其压力检测装置和方法
WO2017114045A1 (zh) 一种压力检测结构及触摸设备
US20190138125A1 (en) Differential force sensing referenced to display
TWI408631B (zh) 觸控顯示裝置
TW201535187A (zh) 具有力偵測之電子裝置
CN104951054B (zh) 一种电子设备及信息处理方法
CN108200774B (zh) 压力检测装置、压力检测方法及电子终端
CN108351725B (zh) 确定输入装置内的介电层的厚度分布的装置、方法和系统
CN107710127B (zh) 用于检测压力的方法和装置
CN206649490U (zh) 压力检测装置以及电子终端

Legal Events

Date Code Title Description
NENP Non-entry into the national phase

Ref country code: DE