WO2018049633A1 - Pressure detection device, pressure detection method, and electronic terminal - Google Patents

Pressure detection device, pressure detection method, and electronic terminal Download PDF

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Publication number
WO2018049633A1
WO2018049633A1 PCT/CN2016/099138 CN2016099138W WO2018049633A1 WO 2018049633 A1 WO2018049633 A1 WO 2018049633A1 CN 2016099138 W CN2016099138 W CN 2016099138W WO 2018049633 A1 WO2018049633 A1 WO 2018049633A1
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Prior art keywords
electrode
pressure
compensation
pressure sensing
capacitance
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PCT/CN2016/099138
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French (fr)
Chinese (zh)
Inventor
程雷刚
文达飞
刘武
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深圳市汇顶科技股份有限公司
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Priority to PCT/CN2016/099138 priority Critical patent/WO2018049633A1/en
Priority to CN201680000883.3A priority patent/CN108200774B/en
Publication of WO2018049633A1 publication Critical patent/WO2018049633A1/en

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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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/12—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in capacitance, i.e. electric circuits therefor
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer

Definitions

  • Embodiments of the present invention relate to the field of electronic technologies, and in particular, to a pressure detecting device, a pressure detecting method, 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 the user.
  • 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 to sense the intensity of light pressure and heavy pressure, so that when the user presses the display screen It will generate two-dimensional coordinate input, and will also generate the third-dimensional pressure input and call out different corresponding functions, thus providing a better user experience.
  • the capacitance change of the effective reference electrode is usually detected by the pressure sensor, and combined with the display device to realize the touch display.
  • a gap is formed between the pressure sensing electrode in the pressure sensor and the reference electrode in the terminal to which the voltage is applied, and an effective pressure detecting capacitor is formed between the pressure sensing electrode and the reference electrode in the terminal to which the voltage is applied.
  • An object of the present invention is to provide a pressure detecting device, a temperature compensation method, and an electronic terminal, which are used to solve the technical problem that the environmental change affects the pressure detecting effect in the prior art.
  • An embodiment of the present invention provides a pressure detecting device including: a pressure sensing electrode, a first auxiliary electrode, a compensation electrode, and a second auxiliary electrode; the pressure sensing electrode and the first auxiliary electrode form a pressure detecting capacitor; The compensation electrode and the second auxiliary electrode form a compensation capacitance that changes in capacitance value according to environmental changes to compensate for a change in the pressure detection capacitance caused by environmental changes, and the compensation electrode is formed in a plurality of the pressure sensing electrodes The periphery or interleaving of the array is placed in the array.
  • the embodiment of the invention further provides a pressure detecting method, comprising:
  • the compensation electrode Obtaining, between the compensation electrode and the second auxiliary electrode, a capacitance value that is generated before and after the environmental change of the compensation capacitor whose capacitance value changes according to an environment change, the compensation electrode being located at a periphery or interspersed by the array formed by the plurality of the pressure sensing electrodes In the array, the capacitance value of the compensation capacitor output before and after the environmental change is used to compensate for the change of the capacitance value of the pressure detection capacitor before and after being pressed due to environmental changes;
  • the pressure of the pressing is calculated based on the capacitance value output before and after the pressure detecting capacitor is pressed and the capacitance value of the compensation capacitor output before and after the environmental change.
  • An embodiment of the present invention further provides an electronic terminal including the pressure detecting device described in any one of the embodiments.
  • the technical solution of the embodiment of the invention has the following advantages: pressure sensing in the pressure detecting device
  • the electrode forms a pressure detecting capacitance with the first auxiliary electrode;
  • the compensation electrode and the second auxiliary electrode form a compensation capacitor whose capacitance value changes according to environmental changes, to compensate for the change of the pressure detecting capacitance caused by the environmental change, and the compensation electrode is located at a plurality of pressures
  • the periphery or interleaving of the array formed by the sensing electrodes is disposed in the array to compensate for variations in the effective pressure detecting capacitance due to the environment such as temperature, thereby improving the reliability and accuracy of the pressure detecting.
  • FIG. 1 is a schematic structural view of a pressure detecting device according to an embodiment of the present invention.
  • Figure 2 is a plan view of the pressure detecting device of Figure 1;
  • FIG. 3 is a schematic structural view of a pressure detecting device according to Embodiment 2 of the present invention.
  • Figure 4 is a plan view of the pressure detecting device of Figure 3;
  • FIG. 5 is a schematic structural view of a pressure detecting device according to a third embodiment of the present invention.
  • Figure 6 is a plan view of the pressure detecting device of Figure 5;
  • FIG. 7 is a schematic structural view of a fourth pressure detecting device according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural view of a pressure detecting device according to a fifth embodiment of the present invention.
  • FIG. 9 is a schematic structural view of a pressure detecting device according to Embodiment 6 of the present invention.
  • FIG. 10 is a schematic flow chart of a temperature compensation method according to Embodiment 7 of the present invention.
  • the pressure sensing electrode and the first auxiliary electrode form a pressure detecting capacitor;
  • the compensating electrode and the second auxiliary electrode form a compensation capacitor whose capacitance value changes according to environmental changes, to compensate for the compensation
  • the compensation electrode is located at the periphery of the array formed by the plurality of pressure sensing electrodes or interposed in the array, thereby compensating for the change of the effective pressure detecting capacitance due to the environment such as temperature, thereby improving the pressure detection Reliability and accuracy.
  • the reference electrode is used as the first auxiliary electrode, and the second auxiliary electrode shares the reference electrode as an example.
  • the temperature compensation in the environment will be described as an example.
  • FIG. 1 is a schematic structural view of a pressure detecting device according to an embodiment of the present invention
  • FIG. 2 is a schematic plan view of the pressure detecting device of FIG. 1.
  • self-capacitance is taken as an example for description.
  • it includes: a conductive surface 101, a pressure sensing electrode 102, a reference electrode 103, and a compensation electrode 104.
  • the conductive surface 101 is, for example, a common electrode in a display module of an electronic terminal.
  • the reference electrode 103 whose pressure sensing electrode has a variable distance is a conductive middle frame of the electronic terminal.
  • the reference electrode 103 is electrically connected to the system ground, and a pressure detecting self-capacitance is formed between the reference electrode 103 and the pressure sensing electrode 102.
  • the plurality of pressure sensing electrodes 102 form an array, one or more of the compensation electrodes 104 are interspersed in the array, and the compensation electrodes 104 and the pressure sensing electrodes 102 are located on different sides. For example, it is located above the pressure sensing electrode 102, and the compensation electrode is multiplexed at the time of sampling the pressure sensing electrode to attenuate the second shielding electrode of the load capacitance to the pressure detecting capacitor when determining the magnitude of the pressure.
  • the second shield electrode and the pressure sensing electrode 102 have the same potential to reduce the formation between the compensation electrode 104 and the reference electrode 103 Pressure load capacitance.
  • the pressure sensing electrode 102 multiplexes the first shield electrode that attenuates the influence of the load capacitance on the pressure detecting capacitance when the temperature compensation electrode is sampled.
  • the temperature compensation electrode 104 is multiplexed into a shielding electrode for reducing the pressure load capacitance formed between the pressure sensing electrode 102 and the reference electrode 103.
  • the pressure sensing electrode 102 is multiplexed into a first shield electrode that attenuates the influence of the load capacitance on the pressure detecting capacitance.
  • FIG. 3 is a schematic structural view of a pressure detecting device according to a second embodiment of the present invention
  • FIG. 4 is a schematic plan view of the pressure detecting device of FIG. 3; similarly to the embodiment of FIG. 1 described above, the pressure detecting device still includes: a reference electrode 103, the pressure sensing electrode 102, the conductive surface 101, the compensation electrode 104, the conductive surface 101 is, for example, a common electrode in the display module, and the reference electrode 103 whose distance from the pressure sensing electrode is constant when pressed is the conductive back of the electronic terminal. shell.
  • the plurality of the pressure sensing electrodes 102 form an array, one or more of the compensation electrodes 104 are interspersed in the array, and the compensation electrodes 104 and the pressure sensing electrodes are located in the same plane.
  • a first shield electrode 105 is provided between the compensation electrode 104 and the reference electrode 103 to reduce the influence of the load capacitance on the pressure detecting capacitance.
  • the area of the shield electrode is larger than the electrode having the largest area among the reference electrode and the pressure sense electrode.
  • FIG. 5 is a schematic structural view of a pressure detecting device according to a third embodiment of the present invention
  • FIG. 6 is a schematic plan view of the pressure detecting device of FIG. 5; similarly to the embodiment of FIG. 1 described above, in the embodiment, the pressure detecting device further includes: a reference electrode 103, the pressure sensing electrode 102, the conductive surface 101, the temperature compensation electrode 104, the conductive surface 101 is, for example, a common electrode in the display module, and the reference electrode 103 whose distance from the pressure sensing electrode is constant when pressed is the conduction of the electronic terminal. Back shell.
  • the plurality of pressure sensing electrodes 102 form an array, and one or more of the temperature compensation electrodes 104 are disposed at a periphery of the array such as a corner or an edge, so that the temperature compensation electrode 104 does not deform with pressure. And forming a compensation capacitor with the reference electrode 103 to change a capacitance value only due to a temperature change.
  • the compensation electrode is disposed at the edge position, the sensitivity is not high for the deformation, or it may be understood that the deformation of the edge position is relatively small, or the compensation electrode is not deformed by the pressure, and thus A change in capacitance is formed between the conductive surface and the auxiliary electrode, and only a change in the environment causes a change in capacitance between the compensation electrode and the auxiliary electrode.
  • FIG. 7 is a schematic structural view of a fourth pressure detecting device according to an embodiment of the present invention; as shown in FIG. 7, a second technical improvement is performed on the pressure sensing electrode 102 by taking a further technical improvement on the basis of the above FIG.
  • a load capacitance is formed between the second shield electrode and the conductive surface 101, and the second shield electrode 106 is used to weaken or eliminate the influence of the load capacitance on the pressure detection capacitance when determining the magnitude of the pressure.
  • the second shielding electrode 106 and the pressure sensing electrode 102 may have the same potential, such as sharing the same driving channel, and between the second shielding electrode 106 and the pressure sensing electrode 102.
  • the second shield electrode 106 and the pressure sensing electrode 102 are in one-to-one correspondence.
  • each of the second shielding electrodes is electrically connected to one driving channel; if the driving channel capability is weak, the plurality of the second shielding electrodes are interconnected and then connected to the same driving channel. Electrical connection.
  • FIG. 8 is a schematic structural view of a pressure detecting device according to a fifth embodiment of the present invention; as shown in FIG. 8, different from the above FIG. 7, a corresponding second shielding electrode 106 is also disposed for each temperature compensation electrode 104, and other figures are shown. The same content of 7 will not be described here.
  • the temperature compensation electrode 104 and the second shield electrode 106 also have the same potential, that is, the temperature compensation electrode 104, the pressure sensing electrode 102 and the second shield electrode 106 also have the same potential, thereby realizing the temperature compensation electrode 104,
  • the load capacitance formed by the pressure sensing electrode 102 and the second shield electrode 106, respectively, does not affect the pressure detecting capacitance.
  • FIG. 9 is a schematic structural view of a pressure detecting device according to a sixth embodiment of the present invention. As shown in FIG. 9, different from the above FIG. 8 , in this embodiment, a whole second shield electrode is used to play the plurality of second
  • the shielding electrode has the same function, and the common area of one second shielding electrode 106 is larger than the sum of the areas of the plurality of pressure sensing electrodes 102 and the plurality of temperature compensation electrodes 104.
  • the shield electrode, the pressure sensing electrode, the compensation electrode, the first auxiliary electrode, and the second auxiliary electrode are sequentially disposed from top to bottom.
  • the pressure sensing electrode and the compensation electrode are located in the same plane.
  • the first auxiliary electrode, the second auxiliary electrode, the shielding electrode, the pressure sensing electrode, and the compensation electrode are disposed from top to bottom, and the pressure sensing The electrode and the compensation electrode are located in the same plane, and the details are not described in detail.
  • the reference electrode is electrically connected to the driving signal, and between the reference electrode and the pressure sensing electrode. A pressure detecting mutual capacitance is formed.
  • the second shielding electrode when referring to FIG. 7 , when the second shielding electrode is disposed, the second shielding electrode may be disposed away from the edge of the effective touch area of the touch module, and the second shielding electrode is disposed at The central area of the effective touch area will not be described in detail in the drawings.
  • FIG. 10 is a schematic flowchart of a temperature compensation method according to Embodiment 7 of the present invention; as shown in FIG. 10, the method in this embodiment is applied to the pressure detecting device in any of the above embodiments, and specifically, the implementation Example methods include:
  • the capacitance value outputted before and after the environmental change of the compensation capacitor is used to compensate for the change of the capacitance value of the pressure detection capacitor before and after being pressed due to environmental changes;
  • FIG. 11 The technical solution of FIG. 11 will be described below in conjunction with a specific formula.
  • the readings of the pressure electrode and the temperature electrode are R C and R T , respectively.
  • the readings of the pressure electrode and the temperature electrode correspond to R Cx and R Tx , due to the pressure electrode and
  • the temperature electrode capacitance is the same as the upper and lower dielectrics, so their relative changes are approximately equal in a small temperature range, ie:
  • the temperature reading can be used to correct the reading R Cx of the pressure electrode at any temperature to the reading R C at the reference temperature:
  • the capacitance value of the pressure detecting capacitor before and after pressing can be used to make a difference.
  • the product is calculated to calculate the pressure value.
  • the conductive surface is the second auxiliary electrode
  • the reference electrode is the first auxiliary electrode
  • the pressure detecting electrode and the first auxiliary electrode form a pressure detecting capacitor, the pressure sensing electrode and the second auxiliary.
  • a load capacitance is formed between the electrodes
  • a compensation capacitor for changing a capacitance value due to an environmental change is formed between the compensation electrode and the first auxiliary electrode as an example.
  • the conductive surface is the first auxiliary electrode
  • the reference electrode is the second auxiliary electrode
  • the pressure sensing electrode and the second auxiliary electrode form a pressure detecting capacitor
  • the pressure sensing electrode and the first auxiliary electrode are formed.
  • a load capacitance between the compensation electrode and the second auxiliary electrode A compensation capacitor that forms a change in capacitance due to environmental changes will be described as an example.
  • the second auxiliary electrode may be separately added, so that a compensation capacitor is formed between the compensation electrode and the second auxiliary electrode, for example, the second auxiliary electrode and the reference electrode are disposed in the same plane. .
  • the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, ie may be located A place, or it can be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without deliberate labor.

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  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Measuring Fluid Pressure (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

A pressure detection device, a pressure detection method, and an electronic terminal. The pressure detection device comprises a pressure sensing electrode (102), a first auxiliary electrode, a compensation electrode (104), and a second auxiliary electrode; the pressure sensing electrode (102) and the first auxiliary electrode form a pressure detection capacitor; the compensation electrode (104) and the second auxiliary electrode form a compensation capacitor, the capacitance value of which varies depending on a change in the environment, so as to compensate a change of the pressure detection capacitor due to the change in the environment; the compensation electrode (104) is located at the periphery of an array formed by multiple pressure sensing electrodes (102) or inserted in the array, so that the reliability and accuracy of pressure detection is improved.

Description

压力检测装置、压力检测方法及电子终端Pressure detecting device, pressure detecting method and electronic terminal 技术领域Technical field
本发明实施例涉及电子技术领域，尤其涉及一种压力检测装置、压力检测方法及电子终端。Embodiments of the present invention relate to the field of electronic technologies, and in particular, to a pressure detecting device, a pressure detecting method, and an electronic terminal.
背景技术Background technique
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。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.
在目前大部分电子产品终端中，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，并调出不同的对应功能，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，通常通过压力感应器来检测有效对参考电极的电容变化，与显示设备结合来实现触控显示。In most current electronic product terminals, the user's finger touches the display screen to generate only two-dimensional coordinate input. However, with the development of touch technology, such as capacitive touch, for example, simple finger touch can no longer satisfy the user. The need for multi-dimensional input, 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 to sense the intensity of light pressure and heavy pressure, so that when the user presses the display screen It will generate two-dimensional coordinate input, and will also generate the third-dimensional pressure input and call out different corresponding functions, thus providing a better user experience. For example, in the pressure detecting technology of the touch screen, the capacitance change of the effective reference electrode is usually detected by the pressure sensor, and combined with the display device to realize the touch display.
现有技术中，压力感应器中的压力感应电极与应用其的终端中的参考电极之间形成一间隙，压力感应电极与应用其的终端中的参考电极之间形成一有效压力检测电容，当有力施加触控模组上时，压力感应器受压导致压力检测电极和参考电极之间的间隙会发生相应的形变，施加力越大，形变量也越大，将该形变转换为电容变化或者电阻变化或者其他电气特性变化，通过检测电容变化或者电阻变化或者其他电气特性变化的变化量，从而来确定压力值大小。In the prior art, a gap is formed between the pressure sensing electrode in the pressure sensor and the reference electrode in the terminal to which the voltage is applied, and an effective pressure detecting capacitor is formed between the pressure sensing electrode and the reference electrode in the terminal to which the voltage is applied. When the touch module is strongly applied, the pressure sensor is pressed to cause a corresponding deformation between the pressure detecting electrode and the reference electrode, and the larger the applied force, the larger the deformation amount, and the deformation is converted into a capacitance change or A change in resistance or other electrical characteristic is determined by detecting a change in capacitance or a change in resistance or a change in other electrical characteristics.
在实现本发明的过程中，发明人发现现有技术中至少存在如下技术问题： 由于温度对压力检测电容的大小的影响，会导致压力检测的准确度较低。In the process of implementing the present invention, the inventors have found that at least the following technical problems exist in the prior art: Due to the effect of temperature on the magnitude of the pressure sensing capacitor, the accuracy of the pressure detection is low.
发明内容Summary of the invention
本发明实施例的目的在于提供一种压力检测装置、温度补偿方法及电子终端，用以解决现有技术中环境变化影响了压力检测效果的技术问题。An object of the present invention is to provide a pressure detecting device, a temperature compensation method, and an electronic terminal, which are used to solve the technical problem that the environmental change affects the pressure detecting effect in the prior art.
本发明实施例采用的技术方案如下：The technical solution adopted by the embodiment of the present invention is as follows:
本发明实施例提供一种压力检测装置，其包括：压力感应电极、第一辅助电极、补偿电极和第二辅助电极；所述压力感应电极与所述第一辅助电极形成一压力检测电容；所述补偿电极与所述第二辅助电极形成随环境变化而电容值改变的补偿电容，以补偿因环境变化导致的所述压力检测电容的变化，所述补偿电极位于多个所述压力感应电极形成的阵列的***或者穿插设置在所述阵列中。An embodiment of the present invention provides a pressure detecting device including: a pressure sensing electrode, a first auxiliary electrode, a compensation electrode, and a second auxiliary electrode; the pressure sensing electrode and the first auxiliary electrode form a pressure detecting capacitor; The compensation electrode and the second auxiliary electrode form a compensation capacitance that changes in capacitance value according to environmental changes to compensate for a change in the pressure detection capacitance caused by environmental changes, and the compensation electrode is formed in a plurality of the pressure sensing electrodes The periphery or interleaving of the array is placed in the array.
本发明实施例还提供一种压力检测方法，包括：The embodiment of the invention further provides a pressure detecting method, comprising:
获取压力感应电极与第一辅助电极之间形成的压力检测电容被按压前后输出的电容值；Obtaining a capacitance value outputted before and after the pressure detecting capacitor formed between the pressure sensing electrode and the first auxiliary electrode is pressed;
获取补偿电极与第二辅助电极之间形成随环境变化而电容值改变的补偿电容在环境变化前后输出的电容值，所述补偿电极位于多个所述压力感应电极形成的阵列的***或者穿插设置在所述阵列中，所述补偿电容在环境变化前后输出的电容值用于补偿所述压力检测电容因环境变化时导致的被按压前后输出的电容值的变化；Obtaining, between the compensation electrode and the second auxiliary electrode, a capacitance value that is generated before and after the environmental change of the compensation capacitor whose capacitance value changes according to an environment change, the compensation electrode being located at a periphery or interspersed by the array formed by the plurality of the pressure sensing electrodes In the array, the capacitance value of the compensation capacitor output before and after the environmental change is used to compensate for the change of the capacitance value of the pressure detection capacitor before and after being pressed due to environmental changes;
根据所述压力检测电容被按压前后输出的电容值以及补偿电容在环境变化前后输出的电容值，计算按压的压力。The pressure of the pressing is calculated based on the capacitance value output before and after the pressure detecting capacitor is pressed and the capacitance value of the compensation capacitor output before and after the environmental change.
本发明实施例再提供一种电子终端，其包括任一项实施例中所述的压力检测装置。An embodiment of the present invention further provides an electronic terminal including the pressure detecting device described in any one of the embodiments.
本发明实施例的技术方案具有以下优点：由于压力检测装置中，压力感应 电极与第一辅助电极形成一压力检测电容；补偿电极与第二辅助电极形成随环境变化而电容值改变的补偿电容，以补偿因环境变化导致的压力检测电容的变化，补偿电极位于多个压力感应电极形成的阵列的***或者穿插设置在阵列中，从而补偿因环境如温度导致的有效压力检测电容的变化，从而提高了压力检测的可靠性及准确度。The technical solution of the embodiment of the invention has the following advantages: pressure sensing in the pressure detecting device The electrode forms a pressure detecting capacitance with the first auxiliary electrode; the compensation electrode and the second auxiliary electrode form a compensation capacitor whose capacitance value changes according to environmental changes, to compensate for the change of the pressure detecting capacitance caused by the environmental change, and the compensation electrode is located at a plurality of pressures The periphery or interleaving of the array formed by the sensing electrodes is disposed in the array to compensate for variations in the effective pressure detecting capacitance due to the environment such as temperature, thereby improving the reliability and accuracy of the pressure detecting.
附图说明DRAWINGS
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.
图1为本发明实施例一压力检测装置的结构示意图；1 is a schematic structural view of a pressure detecting device according to an embodiment of the present invention;
图2为图1压力检测装置的平面示意图；Figure 2 is a plan view of the pressure detecting device of Figure 1;
图3为本发明实施例二压力检测装置的结构示意图；3 is a schematic structural view of a pressure detecting device according to Embodiment 2 of the present invention;
图4为图3压力检测装置的平面示意图；Figure 4 is a plan view of the pressure detecting device of Figure 3;
图5为本发明实施例三压力检测装置的结构示意图；5 is a schematic structural view of a pressure detecting device according to a third embodiment of the present invention;
图6为图5压力检测装置的平面示意图；Figure 6 is a plan view of the pressure detecting device of Figure 5;
图7为本发明实施例四压力检测装置的结构示意图；7 is a schematic structural view of a fourth pressure detecting device according to an embodiment of the present invention;
图8为本发明实施例五压力检测装置的结构示意图；8 is a schematic structural view of a pressure detecting device according to a fifth embodiment of the present invention;
图9为本发明实施例六压力检测装置的结构示意图；9 is a schematic structural view of a pressure detecting device according to Embodiment 6 of the present invention;
图10为本发明实施例七温度补偿方法的流程示意图。FIG. 10 is a schematic flow chart of a temperature compensation method according to Embodiment 7 of the present invention.
具体实施方式detailed description
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于 本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. based on All other embodiments obtained by those skilled in the art without creative efforts are within the scope of the present invention.
本发明下述实施例中，由于压力检测装置中，压力感应电极与第一辅助电极形成一压力检测电容；补偿电极与第二辅助电极形成随环境变化而电容值改变的补偿电容，以补偿因环境变化导致的压力检测电容的变化，补偿电极位于多个压力感应电极形成的阵列的***或者穿插设置在阵列中，从而补偿因环境如温度导致的有效压力检测电容的变化，从而提高了压力检测的可靠性及准确度。In the following embodiments of the present invention, in the pressure detecting device, the pressure sensing electrode and the first auxiliary electrode form a pressure detecting capacitor; the compensating electrode and the second auxiliary electrode form a compensation capacitor whose capacitance value changes according to environmental changes, to compensate for the compensation The change of the pressure detecting capacitance caused by the environmental change, the compensation electrode is located at the periphery of the array formed by the plurality of pressure sensing electrodes or interposed in the array, thereby compensating for the change of the effective pressure detecting capacitance due to the environment such as temperature, thereby improving the pressure detection Reliability and accuracy.
为了对本发明上述核心思想做出清楚的说明，本发明下述实施例中，以自电容技术方案为例进行说明。In order to clearly explain the above-mentioned core idea of the present invention, in the following embodiments of the present invention, a self-capacitance technical solution will be taken as an example for description.
本发明的下述实例中，以参考电极作为第一辅助电极，第二辅助电极共用所述参考电极为例进行说明，以环境中的温度补偿为例进行说明。In the following examples of the present invention, the reference electrode is used as the first auxiliary electrode, and the second auxiliary electrode shares the reference electrode as an example. The temperature compensation in the environment will be described as an example.
图1为本发明实施例一压力检测装置的结构示意图；图2为图1压力检测装置的平面示意图；本实施例一中，以自电容为例进行说明。如图1、2所示，其包括：导电面101、压力感应电极102、参考电极103、补偿电极104，导电面101比如为电子终端的显示模组中的公共电极，受压时相对所述压力感应电极距离可变的参考电极103为电子终端的导电中框。所述参考电极103电连接与***地，所述参考电极103与所述压力感应电极102之间形成压力检测自电容。1 is a schematic structural view of a pressure detecting device according to an embodiment of the present invention; and FIG. 2 is a schematic plan view of the pressure detecting device of FIG. 1. In the first embodiment, self-capacitance is taken as an example for description. As shown in FIG. 1 and FIG. 2, it includes: a conductive surface 101, a pressure sensing electrode 102, a reference electrode 103, and a compensation electrode 104. The conductive surface 101 is, for example, a common electrode in a display module of an electronic terminal. The reference electrode 103 whose pressure sensing electrode has a variable distance is a conductive middle frame of the electronic terminal. The reference electrode 103 is electrically connected to the system ground, and a pressure detecting self-capacitance is formed between the reference electrode 103 and the pressure sensing electrode 102.
本实施例中，多个所述压力感应电极102构成一阵列，一个或多个所述补偿电极104穿插设置在所述阵列中，所述补偿电极104和所述压力感应电极102位于不同的面比如位于所述压力感应电极102之上，所述补偿电极在所述压力感应电极采样时复用为减弱在确定压力大小时负载电容对压力检测电容的第二屏蔽电极，复用情形时的第二屏蔽电极和所述压力感应电极102具有相同的电势，以减少所述补偿电极104与所述参考电极103之间形成的 压力负载电容。所述压力感应电极102在所述温度补偿电极采样时复用减弱负载电容对压力检测电容的影响的的第一屏蔽电极。In this embodiment, the plurality of pressure sensing electrodes 102 form an array, one or more of the compensation electrodes 104 are interspersed in the array, and the compensation electrodes 104 and the pressure sensing electrodes 102 are located on different sides. For example, it is located above the pressure sensing electrode 102, and the compensation electrode is multiplexed at the time of sampling the pressure sensing electrode to attenuate the second shielding electrode of the load capacitance to the pressure detecting capacitor when determining the magnitude of the pressure. The second shield electrode and the pressure sensing electrode 102 have the same potential to reduce the formation between the compensation electrode 104 and the reference electrode 103 Pressure load capacitance. The pressure sensing electrode 102 multiplexes the first shield electrode that attenuates the influence of the load capacitance on the pressure detecting capacitance when the temperature compensation electrode is sampled.
具体地，本实施例中，当所述压力感应电极102采样时，所述温度补偿电极104复用为用来减少压力感应电极102与所述参考电极103之间形成的压力负载电容的屏蔽电极，当温度补偿电极104采样时，所述压力感应电极102复用为减弱负载电容对压力检测电容的影响的第一屏蔽电极。Specifically, in the embodiment, when the pressure sensing electrode 102 samples, the temperature compensation electrode 104 is multiplexed into a shielding electrode for reducing the pressure load capacitance formed between the pressure sensing electrode 102 and the reference electrode 103. When the temperature compensation electrode 104 is sampled, the pressure sensing electrode 102 is multiplexed into a first shield electrode that attenuates the influence of the load capacitance on the pressure detecting capacitance.
需要说明的是，可替代地，在其他实施例中，也可以使用显示模组中的其他导电层作为第一辅助电极，详细不再赘述。It should be noted that, in other embodiments, other conductive layers in the display module may also be used as the first auxiliary electrode, and details are not described herein again.
图3为本发明实施例二压力检测装置的结构示意图；图4为图3压力检测装置的平面示意图；与上述图1实施例相同的是，本实施例中，压力检测装置仍然包括：参考电极103、压力感应电极102、导电面101、补偿电极104，导电面101比如为显示模组中的公共电极，受压时相对所述压力感应电极距离不变的参考电极103为电子终端的导电背壳。3 is a schematic structural view of a pressure detecting device according to a second embodiment of the present invention; and FIG. 4 is a schematic plan view of the pressure detecting device of FIG. 3; similarly to the embodiment of FIG. 1 described above, the pressure detecting device still includes: a reference electrode 103, the pressure sensing electrode 102, the conductive surface 101, the compensation electrode 104, the conductive surface 101 is, for example, a common electrode in the display module, and the reference electrode 103 whose distance from the pressure sensing electrode is constant when pressed is the conductive back of the electronic terminal. shell.
本实施例中，多个所述压力感应电极102构成一阵列，一个或多个所述补偿电极104穿插设置在所述阵列中，所述补偿电极104和所述压力感应电极位于同一面内，所述补偿电极104和与所述参考电极103之间设置有减弱负载电容对压力检测电容的影响的第一屏蔽电极105。In this embodiment, the plurality of the pressure sensing electrodes 102 form an array, one or more of the compensation electrodes 104 are interspersed in the array, and the compensation electrodes 104 and the pressure sensing electrodes are located in the same plane. A first shield electrode 105 is provided between the compensation electrode 104 and the reference electrode 103 to reduce the influence of the load capacitance on the pressure detecting capacitance.
在上述使用屏蔽电极的实施例中，屏蔽电极的面积要大于参考电极和压力感应电极中面积最大的电极。In the above embodiment using the shield electrode, the area of the shield electrode is larger than the electrode having the largest area among the reference electrode and the pressure sense electrode.
图5为本发明实施例三压力检测装置的结构示意图；图6为图5压力检测装置的平面示意图；与上述图1实施例相同的是，本实施例中，压力检测装置仍然包括：参考电极103、压力感应电极102、导电面101、温度补偿电极104，导电面101比如为显示模组中的公共电极，受压时相对所述压力感应电极距离不变的参考电极103为电子终端的导电背壳。 5 is a schematic structural view of a pressure detecting device according to a third embodiment of the present invention; FIG. 6 is a schematic plan view of the pressure detecting device of FIG. 5; similarly to the embodiment of FIG. 1 described above, in the embodiment, the pressure detecting device further includes: a reference electrode 103, the pressure sensing electrode 102, the conductive surface 101, the temperature compensation electrode 104, the conductive surface 101 is, for example, a common electrode in the display module, and the reference electrode 103 whose distance from the pressure sensing electrode is constant when pressed is the conduction of the electronic terminal. Back shell.
本实施例中，多个所述压力感应电极102构成一阵列，一个或多个所述温度补偿电极104设置在所述阵列***比如角落或者边缘，以使所述温度补偿电极104不随压力发生形变，以与所述参考电极103之间形成仅因温度变化引起电容值变化的补偿电容。In this embodiment, the plurality of pressure sensing electrodes 102 form an array, and one or more of the temperature compensation electrodes 104 are disposed at a periphery of the array such as a corner or an edge, so that the temperature compensation electrode 104 does not deform with pressure. And forming a compensation capacitor with the reference electrode 103 to change a capacitance value only due to a temperature change.
本实施例中，由于补偿电极设置在边缘位置，对于形变来说，敏感度不高，或者可理解为压力引起边缘位置形变比较微小，或者近似为补偿电极不会因受压发生形变，从而不会分别与导电面、辅助电极之间形成电容的变化，只有环境的变化，才会引起补偿电极与辅助电极之间形成电容的变化。In this embodiment, since the compensation electrode is disposed at the edge position, the sensitivity is not high for the deformation, or it may be understood that the deformation of the edge position is relatively small, or the compensation electrode is not deformed by the pressure, and thus A change in capacitance is formed between the conductive surface and the auxiliary electrode, and only a change in the environment causes a change in capacitance between the compensation electrode and the auxiliary electrode.
图7为本发明实施例四压力检测装置的结构示意图；如图7所示，以在上述图3的基础上做进一步技术改进为例，在压力感应电极102上面增加第二屏蔽电极106，所述第二屏蔽电极与所述导电面101之间形成负载电容，所述第二屏蔽电极106用于减弱或消除在确定所述压力大小时所述负载电容对所述压力检测电容的影响。具体地，如果要消除负载电容对压力检测电容的影响，第二屏蔽电极106和压力感应电极102可以具有相同的电势，比如共用同一驱动通道，第二屏蔽电极106和压力感应电极102之间不会有电场形成，只有第二屏蔽电极和导电面之间有点电场分布形成了负载电容，但是该负载电容由于第二屏蔽电极106和压力感应电极102之间不会有电场形成从而不会影响压力检测电容；如果是减小的话，则分别接具有不同输出电压的驱动通道。7 is a schematic structural view of a fourth pressure detecting device according to an embodiment of the present invention; as shown in FIG. 7, a second technical improvement is performed on the pressure sensing electrode 102 by taking a further technical improvement on the basis of the above FIG. A load capacitance is formed between the second shield electrode and the conductive surface 101, and the second shield electrode 106 is used to weaken or eliminate the influence of the load capacitance on the pressure detection capacitance when determining the magnitude of the pressure. Specifically, if the influence of the load capacitance on the pressure detecting capacitance is to be eliminated, the second shielding electrode 106 and the pressure sensing electrode 102 may have the same potential, such as sharing the same driving channel, and between the second shielding electrode 106 and the pressure sensing electrode 102. There is an electric field formed, and only a small electric field distribution between the second shield electrode and the conductive surface forms a load capacitance, but the load capacitance does not affect the pressure due to the absence of an electric field between the second shield electrode 106 and the pressure sensing electrode 102. Detect capacitance; if it is reduced, connect drive channels with different output voltages.
如图7所示，本实施例中，第二屏蔽电极106与压力感应电极102之间一一对应。As shown in FIG. 7 , in this embodiment, the second shield electrode 106 and the pressure sensing electrode 102 are in one-to-one correspondence.
本实施例中，如果驱动通道能力较弱，每个所述第二屏蔽电极电连接有一个驱动通道；如果驱动通道能力较弱，多个所述第二屏蔽电极互联起来再与同一个驱动通道电连接。In this embodiment, if the driving channel capability is weak, each of the second shielding electrodes is electrically connected to one driving channel; if the driving channel capability is weak, the plurality of the second shielding electrodes are interconnected and then connected to the same driving channel. Electrical connection.
其他与图3的相同的内容在此不再赘述。 Other contents that are the same as those of FIG. 3 are not described herein again.
图8为本发明实施例五压力检测装置的结构示意图；如图8所示，与上述图7不同的是，对于每个温度补偿电极104也设置了对应的第二屏蔽电极106，其他与图7的相同的内容在此不再赘述。温度补偿电极104与第二屏蔽电极106之间也具有相同的电势，即温度补偿电极104、压力感应电极102与第二屏蔽电极106之间也具有相同的电势，从而实现了温度补偿电极104、压力感应电极102分别与第二屏蔽电极106形成的负载电容不会对压力检测电容有影响。8 is a schematic structural view of a pressure detecting device according to a fifth embodiment of the present invention; as shown in FIG. 8, different from the above FIG. 7, a corresponding second shielding electrode 106 is also disposed for each temperature compensation electrode 104, and other figures are shown. The same content of 7 will not be described here. The temperature compensation electrode 104 and the second shield electrode 106 also have the same potential, that is, the temperature compensation electrode 104, the pressure sensing electrode 102 and the second shield electrode 106 also have the same potential, thereby realizing the temperature compensation electrode 104, The load capacitance formed by the pressure sensing electrode 102 and the second shield electrode 106, respectively, does not affect the pressure detecting capacitance.
图9为本发明实施例六压力检测装置的结构示意图；如图9所示，与上述图8不同的是，本实施例中使用一整块的第二屏蔽电极起到与上述多个第二屏蔽电极同样的作用，一个第二屏蔽电极106共用面积大于多个所述压力感应电极102和多个温度补偿电极104面积的总和。9 is a schematic structural view of a pressure detecting device according to a sixth embodiment of the present invention; as shown in FIG. 9, different from the above FIG. 8 , in this embodiment, a whole second shield electrode is used to play the plurality of second The shielding electrode has the same function, and the common area of one second shielding electrode 106 is larger than the sum of the areas of the plurality of pressure sensing electrodes 102 and the plurality of temperature compensation electrodes 104.
上述图7-图8的实施例中，所述屏蔽电极、所述压力感应电极、所述补偿电极、所述第一辅助电极、及所述第二辅助电极依次从上到下设置，所述压力感应电极和所述补偿电极位于同一面内。In the above embodiments of FIGS. 7-8, the shield electrode, the pressure sensing electrode, the compensation electrode, the first auxiliary electrode, and the second auxiliary electrode are sequentially disposed from top to bottom. The pressure sensing electrode and the compensation electrode are located in the same plane.
需要说明的是，可替代地，所述第一辅助电极、所述第二辅助电极、所述屏蔽电极、所述压力感应电极、及所述补偿电极、从上到下设置，所述压力感应电极和所述补偿电极位于同一面内，详细不再附图赘述，此时，如果是互电容检测的话，所述参考电极与驱动信号电连接，所述参考电极与所述压力感应电极之间形成压力检测互电容。It should be noted that, alternatively, the first auxiliary electrode, the second auxiliary electrode, the shielding electrode, the pressure sensing electrode, and the compensation electrode are disposed from top to bottom, and the pressure sensing The electrode and the compensation electrode are located in the same plane, and the details are not described in detail. In this case, if the mutual capacitance is detected, the reference electrode is electrically connected to the driving signal, and between the reference electrode and the pressure sensing electrode. A pressure detecting mutual capacitance is formed.
需要说明的是，参照上述图7，在设置第二屏蔽电极的时候，也可以将第二屏蔽电极设置成远离触控模组的有效触控区域的边缘，且所述第二屏蔽电极设置在所述有效触控区域的中心区域，详细不再附图说明。It should be noted that, when referring to FIG. 7 , when the second shielding electrode is disposed, the second shielding electrode may be disposed away from the edge of the effective touch area of the touch module, and the second shielding electrode is disposed at The central area of the effective touch area will not be described in detail in the drawings.
图10为本发明实施例七温度补偿方法的流程示意图；如图10所示，本实施例中的方法应用于上述任一实施例中的压力检测装置，具体地，本实施 例方法包括：10 is a schematic flowchart of a temperature compensation method according to Embodiment 7 of the present invention; as shown in FIG. 10, the method in this embodiment is applied to the pressure detecting device in any of the above embodiments, and specifically, the implementation Example methods include:
S801、获取压力感应电极与第一辅助电极之间形成的压力检测电容被按压前后输出的电容值；S801: Obtain a capacitance value that is output before and after the pressure detecting capacitor formed between the pressure sensing electrode and the first auxiliary electrode is pressed;
S802、获取补偿电极与第二辅助电极之间形成随环境变化而电容值改变的补偿电容在环境变化前后输出的电容值；S802. Acquire a capacitance value between a compensation electrode and a second auxiliary electrode that is formed before and after the environmental change by a compensation capacitor whose capacitance value changes according to an environment change;
本实施例中，所述补偿电容在环境变化前后输出的电容值用于补偿所述压力检测电容因环境变化时导致的被按压前后输出的电容值的变化；In this embodiment, the capacitance value outputted before and after the environmental change of the compensation capacitor is used to compensate for the change of the capacitance value of the pressure detection capacitor before and after being pressed due to environmental changes;
S803、根据所述压力检测电容被按压前后输出的电容值以及补偿电容在环境变化前后输出的电容值，计算按压的压力。S803. Calculate the pressure of the pressing according to the capacitance value output before and after the pressure detecting capacitor is pressed and the capacitance value of the compensation capacitor output before and after the environmental change.
以下将结合具体公式对图11的技术方案进行说明。The technical solution of FIG. 11 will be described below in conjunction with a specific formula.
设在基准温度T下，压力电极和温度电极的读数分别为RC和RT，当温度变化到Tx时，压力电极和温度电极的读数对应变化到RCx和RTx，由于压力电极和温度电极电容上下电介质相同，因此，在不大的温度范围内，它们的相对变化近似相等，即：Set at the reference temperature T, the readings of the pressure electrode and the temperature electrode are R C and R T , respectively. When the temperature changes to T x , the readings of the pressure electrode and the temperature electrode correspond to R Cx and R Tx , due to the pressure electrode and The temperature electrode capacitance is the same as the upper and lower dielectrics, so their relative changes are approximately equal in a small temperature range, ie:
Figure PCTCN2016099138-appb-000001
Figure PCTCN2016099138-appb-000001
根据上式，可将用温度电极将压力电极任意温度下的读数RCx校正到基准温度下的读数RC：According to the above formula, the temperature reading can be used to correct the reading R Cx of the pressure electrode at any temperature to the reading R C at the reference temperature:
Figure PCTCN2016099138-appb-000002
Figure PCTCN2016099138-appb-000002
而在实际计算压力时，如果有环境变化，则比如可以通过按压前后压力检测电容的电容值做差再与
Figure PCTCN2016099138-appb-000003
乘积，从而计算出压力值。When the actual pressure is calculated, if there is an environmental change, for example, the capacitance value of the pressure detecting capacitor before and after pressing can be used to make a difference.
Figure PCTCN2016099138-appb-000003
The product is calculated to calculate the pressure value.
需要说明的是，上述实施例中，以导电面为第二辅助电极，以参考电极为第一辅助电极，压力感应电极与第一辅助电极之间形成压力检测电容，压力感应电极与第二辅助电极之间形成负载电容，所述补偿电极与所述第一辅助电极之间形成对因环境变化引起电容值变化的补偿电容为例进行说明。但是，本领域技术人员明了，也可以导电面为第一辅助电极，参考电极为第二辅助电极，压力感应电极与第二辅助电极之间形成压力检测电容，压力感应电极与第一辅助电极形成负载电容，所述补偿电极与所述第二辅助电极之间 形成因环境变化引起电容值变化的补偿电容为例进行说明。It should be noted that, in the above embodiment, the conductive surface is the second auxiliary electrode, the reference electrode is the first auxiliary electrode, and the pressure detecting electrode and the first auxiliary electrode form a pressure detecting capacitor, the pressure sensing electrode and the second auxiliary. A load capacitance is formed between the electrodes, and a compensation capacitor for changing a capacitance value due to an environmental change is formed between the compensation electrode and the first auxiliary electrode as an example. However, it will be apparent to those skilled in the art that the conductive surface is the first auxiliary electrode, the reference electrode is the second auxiliary electrode, the pressure sensing electrode and the second auxiliary electrode form a pressure detecting capacitor, and the pressure sensing electrode and the first auxiliary electrode are formed. a load capacitance between the compensation electrode and the second auxiliary electrode A compensation capacitor that forms a change in capacitance due to environmental changes will be described as an example.
需要说明的是，在上述实施例中，也可以在单独增加第二辅助电极，使得补偿电极与第二辅助电极之间形成补偿电容，比如，在第二辅助电极与参考电极设置在同一面内。It should be noted that, in the foregoing embodiment, the second auxiliary electrode may be separately added, so that a compensation capacitor is formed between the compensation electrode and the second auxiliary electrode, for example, the second auxiliary electrode and the reference electrode are disposed in the same plane. .
上述实施例以温度变化为例进行说明，但是，在本发明上述实施例的启发下，也可以将上述实施例的思想用到其他环境变化时的补偿，详细不再赘述。The above embodiment is described by taking the temperature change as an example. However, in the inspiration of the above-described embodiments of the present invention, the idea of the above embodiment may be used for compensation in other environmental changes, and details are not described herein again.
以上所描述的装置实施例仅仅是示意性的，其中所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。本领域普通技术人员在不付出创造性的劳动的情况下，即可以理解并实施。The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, ie may be located A place, or it can be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without deliberate labor.
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到各实施方式可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件。基于这样的理解，上述技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品可以存储在计算机可读存储介质中，如ROM/RAM、磁碟、光盘等，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行各个实施例或者实施例的某些部分所述的方法。Through the description of the above embodiments, those skilled in the art can clearly understand that the various embodiments can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware. Based on such understanding, the above-described technical solutions may be embodied in the form of software products in essence or in the form of software products, which may be stored in a computer readable storage medium such as ROM/RAM, magnetic Discs, optical discs, etc., include instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments or portions of the embodiments.
最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。 It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not limited thereto; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that The technical solutions described in the foregoing embodiments are modified, or the equivalents of the technical features are replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (12)

  1. 一种压力检测装置，其特征在于，包括：压力感应电极、第一辅助电极、补偿电极和第二辅助电极；所述压力感应电极与所述第一辅助电极形成一压力检测电容；所述补偿电极与所述第二辅助电极形成随环境变化而电容值改变的补偿电容，以补偿因环境变化导致的所述压力检测电容的变化，所述补偿电极位于多个所述压力感应电极形成的阵列的***或者穿插设置在所述阵列中。A pressure detecting device, comprising: a pressure sensing electrode, a first auxiliary electrode, a compensation electrode and a second auxiliary electrode; the pressure sensing electrode and the first auxiliary electrode form a pressure detecting capacitor; the compensation The electrode and the second auxiliary electrode form a compensation capacitor whose capacitance value changes according to an environment to compensate for a change in the pressure detecting capacitance caused by an environmental change, and the compensation electrode is located in an array formed by the plurality of the pressure sensing electrodes The periphery or interleaving is disposed in the array.
  2. 根据权利要求1所述的装置，其特征在于，所述第一辅助电极为触控模组所在电子终端的导电中框，所述电子终端的导电中框与所述压力感应电极之间形成可随压力变化的间隙；或者，所述第一辅助电极为触控模组所在电子终端的导电背壳，所述压力感应电极与所述触控模组的导电背壳之间形成可随压力变化的间隙。The device of claim 1 , wherein the first auxiliary electrode is a conductive middle frame of the electronic terminal where the touch module is located, and the conductive middle frame of the electronic terminal and the pressure sensing electrode are formed. a gap that varies with pressure; or the first auxiliary electrode is a conductive back shell of the electronic terminal where the touch module is located, and the pressure sensing electrode and the conductive back shell of the touch module are formed to change with pressure Clearance.
  3. 根据权利要求1所述的装置，其特征在于，所述第一辅助电极电连接***地，所述第一辅助电极与所述压力感应电极之间形成压力检测自电容。The device according to claim 1, wherein the first auxiliary electrode is electrically connected to the system, and a pressure detecting self-capacitance is formed between the first auxiliary electrode and the pressure sensing electrode.
  4. 根据权利要求1所述的装置，其特征在于，还包括：屏蔽电极，所述屏蔽电极与距离所述屏蔽电极最近的导电面之间形成负载电容，所述屏蔽电极用于减弱或消除在确定所述压力大小时所述负载电容对所述压力检测电容的影响。The device according to claim 1, further comprising: a shield electrode, a load capacitance formed between the shield electrode and a conductive surface closest to the shield electrode, the shield electrode being used for attenuating or eliminating the determination The effect of the load capacitance on the pressure detecting capacitance when the pressure is large.
  5. 根据权利要求4所述的装置，其特征在于，包括多个屏蔽电极以及多个压力感应电极，每个屏蔽电极对应一个压力感应电极；或者，包括多个压力感应电极，以及一个屏蔽电极，多个所述压力感应电极共用一个屏蔽电极，一个屏蔽电极的面积大于多个所述压力感应电极的面积总和。The device according to claim 4, comprising a plurality of shielding electrodes and a plurality of pressure sensing electrodes, each shielding electrode corresponding to one pressure sensing electrode; or comprising a plurality of pressure sensing electrodes, and a shielding electrode, The pressure sensing electrodes share a shielding electrode, and the area of one shielding electrode is larger than the sum of the areas of the plurality of pressure sensing electrodes.
  6. 根据权利要求5所述的装置，其特征在于，每个所述屏蔽电极电连接一个驱动通道；或者，多个所述屏蔽电极互联，再与同一个驱动通道电连接。The device according to claim 5, wherein each of said shield electrodes is electrically connected to a drive channel; or a plurality of said shield electrodes are interconnected and electrically connected to the same drive channel.
  7. 根据权利要求6所述的装置，其特征在于，所述屏蔽电极、所述压 力感应电极、所述补偿电极、所述第一辅助电极、及所述第二辅助电极依次从上到下设置，所述压力感应电极和所述补偿电极位于同一面内；或者，所述第一辅助电极、所述第二辅助电极、所述屏蔽电极、所述压力感应电极、及所述补偿电极从上到下设置；所述压力感应电极和所述补偿电极位于同一面内。The device according to claim 6, wherein said shield electrode, said pressure The force sensing electrode, the compensation electrode, the first auxiliary electrode, and the second auxiliary electrode are sequentially disposed from top to bottom, and the pressure sensing electrode and the compensation electrode are located in the same plane; or An auxiliary electrode, the second auxiliary electrode, the shielding electrode, the pressure sensing electrode, and the compensation electrode are disposed from top to bottom; the pressure sensing electrode and the compensation electrode are located in the same plane.
  8. 根据权利要求4所述的装置，其特征在于，所述补偿电极和所述压力感应电极位于不同的面，在所述压力感应电极采样时，所述补偿电极复用为减弱负载电容对压力检测电容的影响的屏蔽电极，在所述补偿电极采样时，所述压力感应电极复用为减弱负载电容对压力检测电容的影响的屏蔽电极；或者所述补偿电极和所述压力感应电极位于同一面内，所述补偿电极和所述第一辅助电极之间设置有减弱负载电容对压力检测电容的影响的屏蔽电极。The device according to claim 4, wherein the compensation electrode and the pressure sensing electrode are located on different faces, and when the pressure sensing electrode is sampled, the compensation electrode is multiplexed to reduce load capacitance to pressure detection a shield electrode affected by a capacitance, wherein the pressure sensing electrode is multiplexed as a shield electrode that attenuates the influence of the load capacitance on the pressure detecting capacitance; or the compensation electrode and the pressure sensing electrode are located on the same side A shield electrode that reduces the influence of the load capacitance on the pressure detecting capacitance is disposed between the compensation electrode and the first auxiliary electrode.
  9. 根据权利要求8所述的装置，其特征在于，所述补偿电极与所述屏蔽电极具有相同的电势。The device of claim 8 wherein said compensation electrode has the same electrical potential as said shield electrode.
  10. 一种压力检测方法，其特征在于，包括：A pressure detecting method, comprising:
    获取压力感应电极与第一辅助电极之间形成的压力检测电容被按压前后输出的电容值；Obtaining a capacitance value outputted before and after the pressure detecting capacitor formed between the pressure sensing electrode and the first auxiliary electrode is pressed;
    获取补偿电极与第二辅助电极之间形成随环境变化而电容值改变的补偿电容在环境变化前后输出的电容值，所述补偿电极位于多个所述压力感应电极形成的阵列的***或者穿插设置在所述阵列中，所述补偿电容在环境变化前后输出的电容值用于补偿所述压力检测电容因环境变化时导致的被按压前后输出的电容值的变化；Obtaining, between the compensation electrode and the second auxiliary electrode, a capacitance value that is generated before and after the environmental change of the compensation capacitor whose capacitance value changes according to an environment change, the compensation electrode being located at a periphery or interspersed by the array formed by the plurality of the pressure sensing electrodes In the array, the capacitance value of the compensation capacitor output before and after the environmental change is used to compensate for the change of the capacitance value of the pressure detection capacitor before and after being pressed due to environmental changes;
    根据所述压力检测电容被按压前后输出的电容值以及补偿电容在环境变化前后输出的电容值，计算按压的压力。The pressure of the pressing is calculated based on the capacitance value output before and after the pressure detecting capacitor is pressed and the capacitance value of the compensation capacitor output before and after the environmental change.
  11. 根据权利要求10所述的方法，其特征在于，所述补偿电极和所述压力感应电极位于不同的面，在所述压力感应电极采样时，所述补偿电极复用为减弱负载电容对压力检测电容的影响的屏蔽电极，在所述补偿电极采样 时，所述压力感应电极复用为减弱负载电容对压力检测电容的影响的屏蔽电极；或者所述补偿电极和所述压力感应电极位于同一面内，所述补偿电极和所述第一辅助电极设置之间有减弱负载电容对压力检测电容的影响的屏蔽电极。The method according to claim 10, wherein the compensation electrode and the pressure sensing electrode are located on different faces, and when the pressure sensing electrode is sampled, the compensation electrode is multiplexed to reduce load capacitance to pressure detection a shield electrode that affects the capacitance, sampling at the compensation electrode The pressure sensing electrode is multiplexed as a shield electrode that reduces the influence of the load capacitance on the pressure detecting capacitance; or the compensation electrode and the pressure sensing electrode are located in the same plane, the compensation electrode and the first auxiliary electrode There is a shield electrode between the settings that reduces the effect of the load capacitance on the pressure sensing capacitance.
  12. 一种电子终端，其特征在于，包括上述权利要求1-9任一项所述的压力检测装置。 An electronic terminal comprising the pressure detecting device according to any one of claims 1-9.
PCT/CN2016/099138 2016-09-14 2016-09-14 Pressure detection device, pressure detection method, and electronic terminal WO2018049633A1 (en)

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