WO2018000874A1 - 一种触摸压力检测装置、显示屏及触控电子设备 - Google Patents

一种触摸压力检测装置、显示屏及触控电子设备 Download PDF

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Publication number
WO2018000874A1
WO2018000874A1 PCT/CN2017/078855 CN2017078855W WO2018000874A1 WO 2018000874 A1 WO2018000874 A1 WO 2018000874A1 CN 2017078855 W CN2017078855 W CN 2017078855W WO 2018000874 A1 WO2018000874 A1 WO 2018000874A1
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Prior art keywords
resistor
pressure detecting
detecting device
bearing plate
stress
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PCT/CN2017/078855
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English (en)
French (fr)
Inventor
彭乐雄
吴敬东
王冬立
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华为技术有限公司
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Publication of WO2018000874A1 publication Critical patent/WO2018000874A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0414—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; 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
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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 present application relates to the field of communications technologies, and in particular, to a pressure detecting device, a display screen, and a touch electronic device of a touch mobile terminal.
  • pressure detecting devices In order to enhance the user's interaction with mobile terminal devices such as mobile phones, watches, wearable devices, etc., pressure detecting devices have been widely applied to components such as touch screens and housings to recognize the user's touch position and pressure, such as pressure sensors.
  • the existing pressure detecting devices use the deformation of the detecting structure to realize the pressure detecting, but the structural deformation caused by the user when the terminal device is normally operated is very small, so that the detection accuracy and sensitivity of the pressure detecting device are higher.
  • a more commonly used pressure detecting device is a capacitive pressure sensor, but to ensure the detection accuracy and sensitivity, the distance between the electrodes is required to be sufficiently large, resulting in an increase in the thickness of the terminal device, and The electric constant is easily affected by temperature and humidity, which in turn causes detection errors, which makes the detection accuracy and sensitivity of the pressure detecting device low.
  • the embodiment of the present application provides a pressure detecting device, a display screen, and a touch electronic device of a touch mobile terminal, and the detection accuracy and sensitivity of the pressure detecting device are high.
  • the embodiment of the present application provides a pressure detecting device for a touch mobile terminal, comprising a force receiving plate, a sensor film, and a stress bearing plate between the force receiving plate and the sensor film, wherein:
  • the sensor unit Forming, on the sensor film, a plurality of sensor units arranged in an array, the sensor unit comprising a first resistor, a second resistor, a third resistor and a fourth resistor prepared from the strain sensitive material; the first resistor, the first resistor The second resistor, the third resistor, and the fourth resistor cooperate to form a Wustbridge, wherein the first resistor is in series with the third resistor, the second resistor is in series with the fourth resistor, and a circuit in which the first resistor is connected in series with the third resistor and a circuit in which the second resistor is connected in series with the fourth resistor, the first resistor and the fourth resistor being opposite arms, the second The resistor and the third resistor are opposite arms;
  • the stress bearing plate is provided with an opening penetrating through the thickness thereof; in each of the sensor units, a projection of the second resistor and the third resistor on a surface of the stress bearing plate facing the sensor film side Located in the opening area, and a projection of the first resistor and the fourth resistor on a side surface of the stress bearing plate toward the sensor film is located outside the opening in the stress carrying plate Area.
  • the force receiving board is a screen, a battery cover, or a middle frame of the touch electronic device, and the touch pressure detecting device can be applied to different positions, and the applicable range wide.
  • the stress carrying plate is provided with an opening including the second resistor disposed on the sensor film. a corresponding first opening, a second opening corresponding to the third resistor provided on the sensor film.
  • the resistance of the second resistor may not change when the sensor unit is subjected to the stress of the stress-carrying plate due to the presence of the first opening, and the third resistor may be in the sensor unit due to the presence of the second opening. The resistance does not change when subjected to the stress of the stress-carrying plate.
  • the stress carrying plate is provided with an opening including one of the sensor units provided on the sensor film. Corresponding third openings, each pair of mutually corresponding sensor units and third openings, wherein the second resistance of the sensor unit and the third resistor are on the stress carrying plate toward the sensor film A projection on the side surface is located within the third aperture area.
  • the second resistor and the third resistor in each sensor unit share a third opening, and the second resistor and the third resistor can also prevent the resistance from changing when the sensor unit is subjected to the stress of the stress-carrying plate.
  • the Young's modulus of the stress-carrying plate is greater than the Young's modulus of the sensor film, thereby ensuring the stress-bearing plate.
  • the stiffness meets the requirements.
  • the senor film is disposed on a side of the stress bearing plate facing the force plate or on the stress
  • the carrier plate faces away from the side of the force plate, and the product is highly flexible in production, and can be combined with the structure of the entire product to determine how to set the position of the resistor unit.
  • the senor film is provided with a thickness of the second resistor and the third resistor is smaller than the film.
  • the thickness of the position weakens the connection between the film and the second resistor and the third resistor, thereby reducing the influence of the film on the deformation of the second resistor and the third resistor, and improving the detection accuracy.
  • the senor film is provided in a peripheral region at a position where the second resistor and the third resistor are disposed.
  • the continuous grooving weakens the connection between the film and the second resistor and the third resistor, thereby reducing the influence of the film on the deformation of the second resistor and the third resistor, and improving the detection accuracy.
  • the sensor film is bonded to the periphery of the position where the first resistor and the fourth resistor are disposed.
  • the stress-carrying plate is more advantageous for coupling the deformation generated by the stress-carrying plate to the first resistor and the fourth resistor, thereby improving the accuracy and sensitivity of the pressure detection.
  • the sensor film is bonded by foam at a position where the second resistor and the third resistor are disposed.
  • the force plate is for reducing the influence of the force plate on the deformation of the second resistor and the third resistor, and the deformation of the two resistors is minimized.
  • an embodiment of the present application provides a display screen, including a screen, and further includes any one of the pressure detecting devices provided in the first aspect.
  • the display screen can utilize the touch pressure detecting device described above to accurately sense the touch pressure.
  • the embodiment of the present application provides a touch electronic device, including a memory, a processor, and a first The pressure detecting device of any aspect, wherein: the processor is connected to the pressure detecting device and the memory signal, and configured to generate a touch signal according to the signal detected by the pressure detecting device, and according to the memory in advance Corresponding relationship between the stored touch signals and corresponding operations controls the touch electronic device to perform an action. Using the processor and memory to handle the pressure sensed by the touch pressure sensing device can more accurately react to improve the performance of the touch electronic device.
  • the pressure detecting device in the pressure detecting device provided by the first aspect, includes a force receiving plate, a sensor film, and a stress bearing plate disposed therebetween, and the stress bearing plate is provided with an opening.
  • the sensor film is provided with a first resistor, a second resistor, a third resistor and a fourth resistor prepared by the strain sensitive material, wherein the first resistor and the third resistor are connected in series, and the second resistor and the fourth resistor are connected in series, and then the two A series circuit is connected in parallel to form a Wyster bridge.
  • the second resistance and the third resistance correspond to the opening area of the stress bearing plate, and when the external force acts on the force receiving plate, the force plate is deformed. And coupled to the stress bearing plate, the stress bearing plate transmits the deformation to the sensor film, and the resistance corresponding to the unopened region of the stress bearing plate is deformed and the resistance value changes, and the resistance corresponding to the opening area of the stress bearing plate It is not affected by the deformation of the stress-carrying plate, and therefore, the resistance value changes to 0 or is extremely small, thereby improving the sensitivity and accuracy of the pressure detecting device.
  • FIG. 1 is a schematic structural diagram of a pressure detecting device for a touch mobile terminal according to an embodiment of the present application
  • FIG. 2 is an enlarged view of a sensor unit of a pressure detecting device for a touch mobile terminal according to an embodiment of the present application
  • FIG. 3 is a circuit diagram of a Wyster bridge of a sensor unit in a pressure detecting device of a touch mobile terminal according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of a touch electronic device according to an embodiment of the present application.
  • a pressure detecting device for a touch mobile terminal provided by an embodiment of the present invention includes a force receiving plate 1 , a sensor film 2 , and a stress bearing plate 3 between the force receiving plate 1 and the sensor film 2 , wherein:
  • the sensor film 2 is formed with a plurality of sensor units 4 distributed in an array, and the sensor unit 4 includes a first resistor 41, a second resistor 42, a third resistor 43, and a fourth resistor 44, which are prepared from strain sensitive materials;
  • the resistor 41, the first resistor 42, the third resistor 43, and the fourth resistor 44 cooperate to form a Wheatstone bridge, as shown in FIG. 3, wherein the first resistor 41 is connected in series with the third resistor 43.
  • the resistor 42 is connected in series with the fourth resistor 44, and the circuit in which the first resistor 41 and the third resistor 43 are connected in series is connected in parallel with the circuit in which the first resistor 42 and the fourth resistor 44 are connected in series, and the first resistor 41 and the fourth resistor 44 are The first resistor 42 and the third resistor 43 are opposite arms;
  • the stress-carrying plate 3 is provided with an opening 31 extending through its thickness; in each of the sensor units 4, a projection of the first resistor 42 and the third resistor 43 on the surface of the stress-carrying plate 3 facing the sensor film 2 is located in the area of the opening 31 And the projection of the first resistor 41 and the fourth resistor 44 on the surface of the stress bearing plate 3 facing the sensor film 2 is located at the stress bearing A region other than the opening 31 in the carrier 3.
  • FIG 3 shows the schematic diagram of the Wyster bridge, where: Ui is the input terminal, Uo is the output terminal, R1 is the resistance value of the first resistor 41, R2 is the resistance value of the second resistor 42, R3 is the first The resistance of the three resistors 43 and R4 are the resistances of the fourth resistors 44.
  • the stress bearing plate 3 is located between the force receiving plate 1 and the sensor film 2, and when the force receiving plate 1 is subjected to the force, a corresponding deformation is generated, and the generated deformation is coupled to the stress bearing plate 3, the stress bearing plate 3 is provided with an opening 31.
  • the sensor unit disposed on the sensor film 2 is a Wyster bridge circuit, wherein a set of opposing arms are a first resistor 42 and a third resistor 43 corresponding to the opening of the stress bearing plate 3.
  • the area of the hole 31 is not affected by the deformation of the stress-carrying plate 3, so that the resistance value changes to 0 or is extremely small; the other set of opposing arms are the first resistance 41 and the fourth resistance 44, corresponding to the stress-carrying plate 3
  • the stress-carrying plate 3 is deformed, the first resistor 41 and the fourth resistor 44 are also deformed, and the resistance value thereof is greatly changed, thereby detecting the pressure position received by the force receiving plate 1. And size.
  • the force receiving plate 1 in the above embodiment is a screen, a battery cover or a middle frame of the touch electronic device, and may be any force receiving component of the touch electronic device.
  • the opening 31 provided in the stress-carrying plate 3 includes a first opening corresponding to the first resistor 42 provided on the sensor film 2, and a first one corresponding to the third resistor 43 provided on the sensor film 2 Two openings. That is to say, in each of the sensor units 4, the resistance of the first resistor 42 may not change when the sensor unit 4 is subjected to the stress of the stress-carrying plate 3 due to the presence of the first opening, and at the same time, the third resistor 43 is The presence of the two openings can be such that the resistance does not change when the sensor unit 4 is subjected to the stress of the stress-carrying plate 3.
  • the opening 31 of the stress-carrying plate 3 includes a third opening corresponding to the sensor unit 4 provided on the sensor film 2, and a pair of sensor units 4 and a third opening corresponding to each other, the sensor unit 4
  • the projection of the first resistor 42 and the third resistor 43 on the surface of the stress-carrying plate 3 facing the sensor film 2 is located in the third opening area.
  • the first resistor 42 and the third resistor 43 of the sensor unit 4 corresponding to the opening 31 of the stress-carrying plate 3 are located in one opening.
  • the resistance values of the first resistor 42 and the third resistor 43 do not change.
  • the Young's modulus of the stress-carrying plate 3 is larger than the Young's modulus of the sensor film 2.
  • the sensor film 2 in one embodiment of the present application may be disposed on one side of the stress bearing plate 3 facing the force receiving plate 1 or on the side of the stress bearing plate 3 facing away from the force receiving plate 1 according to the requirements of the actual product.
  • the thickness of the peripheral portion of the sensor film 2 where the first resistor 42 and the third resistor 43 are disposed is smaller than the thickness of the other portions of the sensor film 2, thereby weakening the influence of the film on the deformation of the first resistor 42 and the third resistor 43 to increase the pressure. Detection accuracy and sensitivity of the detection device.
  • a discontinuous groove 21 (a blank area indicated by reference numeral 21 in FIG. 2) may be provided in a peripheral region of the sensor film 2 where the positions of the first resistor 42 and the third resistor 43 are provided. Further, the influence of the deformation of the film 2 on the first resistor 42 and the third resistor 43 is weakened to improve the detection accuracy and sensitivity of the pressure detecting device.
  • the sensor film 2 is bonded to the stress bearing plate 3 at a position where the first resistor 41 and the fourth resistor 44 are disposed, which facilitates the deformation of the first resistor 41 and the fourth resistor 44 to the stress bearing plate 3, thereby improving the pressure detection.
  • the sensitivity of the device is bonded to the stress bearing plate 3 at a position where the first resistor 41 and the fourth resistor 44 are disposed, which facilitates the deformation of the first resistor 41 and the fourth resistor 44 to the stress bearing plate 3, thereby improving the pressure detection.
  • the sensitivity of the device is bonded to the stress bearing plate 3 at a position where the first resistor 41 and the fourth resistor 44 are disposed, which facilitates the deformation of the first resistor 41 and the fourth resistor 44 to the stress bearing plate 3, thereby improving the pressure detection.
  • the sensor film 2 is bonded to the force receiving plate 1 by foam at a position where the first resistor 42 and the third resistor 43 are disposed, and the first resistor 42 and the third resistor 43 are connected to the force by a soft material.
  • the plate 1 further reduces the influence of the force plate 1 on the above two resistances, and improves the sensitivity of the pressure detecting device.
  • a display screen including a screen, and further includes the above-described pressure detecting device.
  • the display screen can utilize the touch pressure detecting device described above to accurately sense the touch pressure.
  • another embodiment of the present application further provides a touch electronic device, including a memory 100, a processor 200, and the above-described pressure detecting device 300, wherein the processor 200 and the pressure detecting device 300 And the memory 100 is connected to generate a touch signal according to the signal detected by the pressure detecting device 300, and controls the touch electronic device to operate according to the corresponding relationship between the touch signal stored in the memory 100 and the corresponding operation.
  • the processor 200 and the memory 100 to process the pressure sensed by the touch pressure detecting device 300, the reaction can be more accurately performed to improve the performance of the touch electronic device.
  • the original signal from the pressure detecting device 300 is generally weak.
  • the processor is not directly connected to the signal output by the pressure detecting device, but is performed by some driving circuits (for example, an amplifier, an AD conversion circuit, etc.). Connections, these devices and implementations are all prior art, and are not specifically described in this embodiment.
  • Multiple means two or more.
  • embodiments of the present application can be provided as a method, system, 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.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Position Input By Displaying (AREA)

Abstract

一种触摸压力检测装置、显示屏及触控电子设备。压力检测装置包括受力板、传感器薄膜和位于两者之间的应力承载板，受力板与应力承载板之间力耦合，应力承载板与传感器薄膜之间力耦合；传感器薄膜上设有多个传感器单元，传感器单元包括配合形成惠斯特电桥的第一电阻、第二电阻、第三电阻、第四电阻，应力承载板设有贯穿其厚度的开孔；每个传感器单元中，第二电阻和第三电阻对应于应力承载板的开孔区域内，且第一电阻和第四电阻对应于应力承载板开孔之外的区域。在受力板受外力作用时，应力承载板未开孔区域和开孔区域部分的电阻变化不同，进而提高了压力检测装置的灵敏度以及精确性。

Description

一种触摸压力检测装置、显示屏及触控电子设备
本申请要求在2016年06月27日提交中国专利局、申请号为201610480611.X、发明名称为“一种触摸压力检测装置、显示屏及触控电子设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通讯技术领域，特别涉及一种触控移动终端的压力检测装置、显示屏及触控电子设备。
背景技术
为了提升用户与手机、手表、可穿戴设备等移动终端设备的互动，压力检测装置已经广泛地应用于触摸屏和外壳等部件以识别用户的触摸位置和压力，如压力传感器。现有的压力检测装置都是利用检测结构的形变来实现压力检测，但是用户在正常操作终端设备时产生的结构形变十分微小，因此对压力检测装置的检测精度、灵敏度提出了更高的要求。
现有技术中，一种较为常用的压力检测装置为电容式压力传感器，但是要保证其检测精度及灵敏度，就要求电极之间的距离足够大，导致终端设备厚度增大，而且电容间的介电常数容易受到温度和湿度的影响，进而引起检测误差，使压力检测装置的检测精度和灵敏度较低。
因此，如何提供一种检测精度和灵敏度较高的触控移动终端的压力检测装置是本领域技术人员亟需解决的技术问题之一。
发明内容
本申请实施例提供了一种触控移动终端的压力检测装置、显示屏及触控电子设备，该压力检测装置的检测精度和灵敏度较高。
第一方面，本申请实施例提供一种触控移动终端的压力检测装置，包括受力板、传感器薄膜以及位于所述受力板与所述传感器薄膜之间的应力承载板，其中：
所述受力板与所述应力承载板之间力耦合，所述应力承载板与所述传感器薄膜之间力耦合；
所述传感器薄膜上形成有多个呈阵列分布的传感器单元，所述传感器单元包括由应变敏感材料制备的第一电阻、第二电阻、第三电阻以及第四电阻；所述第一电阻、第二电阻、第三电阻以及第四电阻配合形成惠斯特电桥，其中，所述第一电阻与所述第三电阻串联，所述第二电阻与所述第四电阻串联，并且，所述第一电阻与所述第三电阻串联后的电路和所述第二电阻与所述第四电阻串联后的电路并联，所述第一电阻与所述第四电阻为相对臂，所述第二电阻与所述第三电阻为相对臂；
所述应力承载板设有贯穿其厚度的开孔；每一个所述传感器单元中，所述第二电阻和所述第三电阻在所述应力承载板朝向所述传感器薄膜一侧表面上的投影位于所述开孔区域内，且所述第一电阻和所述第四电阻在所述应力承载板朝向所述传感器薄膜一侧表面上的投影位于所述应力承载板中所述开孔之外的区域。
结合上述第一方面，在另一种可能的实现方式中，所述受力板为触控电子设备的屏幕、电池盖、或中框，该触摸压力检测装置可以应用于不同的位置，适用范围广。
结合上述第一方面及上述各种可能的实现试，在另一种可能的实现方式中，所述应力承载板设有的开孔包括与所述传感器薄膜上设有的所述第二电阻一一对应的第一开孔、与所述传感器薄膜上设有的所述第三电阻一一对应的第二开孔。每一个传感器单元中，第二电阻由于第一开孔的存在可以在传感器单元受到应力承载板的应力作用时阻值不发生变化，同时，第三电阻由于第二开孔的存在可以在传感器单元受到应力承载板的应力作用时阻值不发生变化。
结合上述第一方面及上述各种可能的实现试，在另一种可能的实现方式中，所述应力承载板设有的开孔包括与所述传感器薄膜上设有的所述传感器单元一一对应的第三开孔，每一对相互对应的传感器单元和第三开孔中，所述传感器单元的所述第二电阻和所述第三电阻在所述应力承载板朝向所述传感器薄膜一侧表面上的投影位于所述第三开孔区域内。每一个传感器单元中的第二电阻和第三电阻共用一个第三开孔，同样能够使第二电阻和第三电阻在传感器单元受到应力承载板的应力作用时电阻不会发生变化。
结合上述第一方面及上述各种可能的实现试，在另一种可能的实现方式中，所述应力承载板的杨氏模量大于所述传感器薄膜的杨氏模量，进而保证应力承载板的刚度满足要求。
结合上述第一方面及上述各种可能的实现试，在另一种可能的实现方式中，所述传感器薄膜设于所述应力承载板朝向所述受力板的一侧或者设于所述应力承载板背离所述受力板的一侧，产品生产时的灵活性较高，可以结合整个产品的结构来决定如何设置电阻单元的位置。
结合上述第一方面及上述各种可能的实现试，在另一种可能的实现方式中，所述传感器薄膜设有所述第二电阻和所述第三电阻的位置周边区域的厚度小于薄膜其他位置的厚度，减弱薄膜与所述第二电阻和所述第三电阻之间的连接，从而降低薄膜对于所述第二电阻和所述第三电阻形变的影响，提高检测精度。
结合上述第一方面及上述各种可能的实现试，在另一种可能的实现方式中，所述传感器薄膜在设有所述第二电阻和所述第三电阻的位置的周边区域设有不连续的开槽，减弱薄膜与所述第二电阻和所述第三电阻之间的连接，从而降低薄膜对于所述第二电阻和所述第三电阻形变的影响，提高检测精度。
结合上述第一方面及上述各种可能的实现试，在另一种可能的实现方式中，所述传感器薄膜在设有所述第一电阻和所述第四电阻的位置周边粘结于所述应力承载板，更加有利于将应力承载板产生的形变耦合到所述第一电阻和所述第四电阻上，提高压力检测的精度和灵敏度。
结合上述第一方面及上述各种可能的实现试，在另一种可能的实现方式中，所述传感器薄膜在设有所述第二电阻和所述第三电阻的位置周边通过泡棉粘结于所述受力板，是为了降低受力板对所述第二电阻和所述第三电阻形变的影响，将上述两个电阻的形变降到最低。
第二方面，本申请实施例提供一种显示屏，包括屏幕，还包括第一方面提供的任意一种压力检测装置。该显示屏可以利用上述触摸压力检测装置来精确的感应触摸压力。
第三方面，本申请实施例提供一种触控电子设备，包括存储器、处理器，还包括第一 方面提供的任意一种压力检测装置，其中：所述处理器与所述压力检测装置以及存储器信号连接，用于根据所述压力检测装置检测的信号生成触控信号，并且根据所述存储器内预先存储的触控信号与相应操作的对应关系控制所述触控电子设备进行动作。利用处理器和存储器来处理触摸压力检测装置感应到的压力，可以更加精确的做出反应，提高触控电子设备的性能。
本申请实施例中，根据第一方面提供的压力检测装置，上述压力检测装置中包括受力板、传感器薄膜以及位于两者之间的应力承载板，上述应力承载板上设有开孔，所述传感器薄膜上设有由应变敏感材料制备的第一电阻、第二电阻、第三电阻以及第四电阻，上述第一电阻和第三电阻串联，第二电阻和第四电阻串联，然后上述两个串联电路并联，构成惠斯特电桥。为了检测受力板受到压力的位置和大小，将第二电阻和第三电阻对应于上述应力承载板的开孔区域，当有外力作用于所述受力板时，所述受力板产生形变并耦合到应力承载板上，应力承载板将形变传递到所述传感器薄膜，对应于应力承载板未开孔区域的电阻产生形变进而阻值发生变化，而对应于应力承载板开孔区域的电阻不会受到应力承载板形变的影响，因此，阻值变化为0或者极其微小，进而可以提高压力检测装置的灵敏度以及精确性。
附图说明
图1为本申请实施例提供的一种触控移动终端的压力检测装置的结构示意图；
图2为本申请实施例提供的一种触控移动终端的压力检测装置的传感器单元的放大图；
图3为本申请实施例提供的一种触控移动终端的压力检测装置中传感器单元的惠斯特电桥线路图；
图4为本申请实施例提供的一种触控电子设备示意图。
具体实施方式
下面将结合附图对本申请实施例作进一步地详细描述。
请参考图1～图3：
如图1所示，本申请一个实施例提供的触控移动终端的压力检测装置包括受力板1、传感器薄膜2以及位于受力板1与传感器薄膜2之间的应力承载板3，其中：
受力板1与应力承载板3之间力耦合，应力承载板3与传感器薄膜2之间力耦合；
传感器薄膜2上形成有多个呈阵列分布的传感器单元4，传感器单元4包括由应变敏感材料制备的第一电阻41、第二电阻42、第三电阻43以及第四电阻44；所述第一电阻41、第一电阻42、第三电阻43以及第四电阻44配合形成惠斯特电桥(Wheatstone bridge)，如图3所示，其中，第一电阻41与第三电阻43串联，第一电阻42与第四电阻44串联，并且，第一电阻41与第三电阻43串联后的电路和第一电阻42与第四电阻44串联后的电路并联，第一电阻41与第四电阻44为相对臂，第一电阻42与第三电阻43为相对臂；
应力承载板3设有贯穿其厚度的开孔31；每一个传感器单元4中，第一电阻42和第三电阻43在应力承载板3朝向传感器薄膜2一侧表面上的投影位于开孔31区域内，且第一电阻41和第四电阻44在应力承载板3朝向传感器薄膜2一侧表面上的投影位于应力承 载板3中开孔31之外的区域。
如图3所示为惠斯特电桥的原理图，其中：Ui为输入端，Uo为输出端，R1为第一电阻41的阻值，R2为第二电阻42的阻值，R3为第三电阻43的阻值，R4为第四电阻44的阻值。当两组相对臂的电阻阻值乘积相同时，即R1·R4＝R2·R3时，电桥平衡，输出为零，即Uo＝0，否则，Uo≠0。
上述压力检测装置中应力承载板3位于受力板1和传感器薄膜2之间，当受力板1受力以后产生相应的形变，并将产生的形变耦合到应力承载板3上，应力承载板3上设有开孔31，设于传感器薄膜2上的传感器单元为惠斯特电桥电路，其中，一组相对臂为第一电阻42和第三电阻43，对应于应力承载板3的开孔31区域，并不会受到应力承载板3的形变的影响，因此其阻值变化为0或者极其微小；另一组相对臂为第一电阻41和第四电阻44，对应于应力承载板3的非开孔区域，当应力承载板3发生形变时导致第一电阻41和第四电阻44也发生形变，其电阻阻值发生较大的变化，进而可以检测出受力板1受到的压力位置和大小。
因此，本申请实施例提供的触控移动终端的压力检测装置的精确性和灵敏度较高。
上述实施例中的受力板1为触控电子设备的屏幕、电池盖或中框，可以是触控电子设备的任何受力部件。
应力承载板3上设有的开孔31包括与传感器薄膜2上设有的第一电阻42一一对应的第一开孔、与传感器薄膜2上设有的第三电阻43一一对应的第二开孔。也就是说，每一个传感器单元4中，第一电阻42由于第一开孔的存在可以在传感器单元4受到应力承载板3的应力作用时阻值不发生变化，同时，第三电阻43由于第二开孔的存在可以在传感器单元4受到应力承载板3的应力作用时阻值不发生变化。
应力承载板3设有的开孔31包括与传感器薄膜2上设有的传感器单元4一一对应的第三开孔，每一对相互对应的传感器单元4和第三开孔中，传感器单元4的第一电阻42和第三电阻43在应力承载板3朝向传感器薄膜2一侧表面上的投影位于第三开孔区域内。本实施例中传感器单元4对应于应力承载板3的开孔31区域的第一电阻42和第三电阻43位于一个开孔中，同样，在传感器单元4受到应力承载板3的应力作用时，第一电阻42和第三电阻43的阻值不会发生变化。
为了保证应力承载板3的刚度足够大，应力承载板3的杨氏模量大于传感器薄膜2的杨氏模量。
而且，本申请的一个实施例中的传感器薄膜2可以根据实际产品的需求设于应力承载板3朝向受力板1的一侧或者设于应力承载板3背离受力板1的一侧。
传感器薄膜2设有第一电阻42和第三电阻43的位置周边区域的厚度小于传感器薄膜2其他位置的厚度，进而将薄膜对第一电阻42和第三电阻43的形变影响减弱，以提高压力检测装置的检测精度和灵敏度。
另外，如图2所示，还可以在传感器薄膜2中设有第一电阻42和第三电阻43的位置的周边区域设置不连续的开槽21(图2中标号21所示的空白区域)，进而将薄膜2对第一电阻42和第三电阻43的形变影响减弱，以提高压力检测装置的检测精度和灵敏度。
传感器薄膜2在设有第一电阻41和第四电阻44的位置周边粘结于应力承载板3，有利于第一电阻41和第四电阻44接收到应力承载板3的形变，进而提高压力检测装置的灵敏度。
相反地，传感器薄膜2在设有第一电阻42和第三电阻43的位置周边通过泡棉粘结于受力板1，利用较软的材料连接第一电阻42和第三电阻43与受力板1，进而减少受力板1对上述两个电阻的影响，提高压力检测装置的灵敏度。
本申请的另一实施例中，提供了一种显示屏，包括屏幕，还包括上述压力检测装置。该显示屏可以利用上述触摸压力检测装置来精确的感应触摸压力。
请参考图4，本申请的另一实施例中，还提供了一种触控电子设备，包括存储器100、处理器200，还包括上述压力检测装置300，其中：处理器200与压力检测装置300以及存储器100信号连接，用于根据压力检测装置300检测的信号生成触控信号，并且根据存储器100内预先存储的触控信号与相应操作的对应关系控制触控电子设备进行动作。利用处理器200和存储器100来处理触摸压力检测装置300感应到的压力，可以更加精确的做出反应，提高触控电子设备的性能。
可以理解的是，来自压力检测装置300的原始信号一般比较弱，通常处理器并不直接连接压力检测装置输出的信号，而通过一些驱动电路(例如，可包括放大器，AD转换电路等)来进行连接，这些器件及实现方式都属于现有技术，本实施例并不进行具体说明。
以下，对本申请中的部分用语进行解释说明，以便与本领域技术人员理解。
多个，是指两个或两个以上。
另外，需要理解的是，在本申请的描述中，“第一”、“第二”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、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、设备(系统)、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。
显然，本领域的技术人员可以对本申请实施例进行各种改动和变型而不脱离本申请实施例的精神和范围。这样，倘若本申请实施例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 (12)

  1. 一种触摸压力检测装置，其特征在于，包括受力板、传感器薄膜以及位于所述受力板与所述传感器薄膜之间的应力承载板，其中：
    所述受力板与所述应力承载板之间力耦合，所述应力承载板与所述传感器薄膜之间力耦合；
    所述传感器薄膜上形成有多个呈阵列分布的传感器单元，所述传感器单元包括由压力敏感材料制备的第一电阻、第二电阻、第三电阻以及第四电阻；所述第一电阻、第二电阻、第三电阻以及第四电阻配合形成惠斯特电桥，其中，所述第一电阻与所述第三电阻串联，所述第二电阻与所述第四电阻串联，并且，所述第一电阻与所述第三电阻串联后的电路和所述第二电阻与所述第四电阻串联后的电路并联，所述第一电阻与所述第四电阻为相对臂，所述第二电阻与所述第三电阻为相对臂；所述四个电阻具有相同的压敏性质；
    所述应力承载板设有贯穿其厚度的开孔；每一个所述传感器单元中，所述第二电阻和所述第三电阻在所述应力承载板朝向所述传感器薄膜一侧表面上的投影位于所述开孔区域内，且所述第一电阻和所述第四电阻在所述应力承载板朝向所述传感器薄膜一侧表面上的投影位于所述应力承载板中所述开孔之外的区域。
  2. 根据权利要求1所述的压力检测装置，其特征在于，所述受力板为触控电子设备的屏幕、电池盖或中框。
  3. 根据权利要求1或2所述的压力检测装置，其特征在于，所述应力承载板设有的开孔包括与所述传感器薄膜上设有的所述第二电阻一一对应的第一开孔、与所述传感器薄膜上设有的所述第三电阻一一对应的第二开孔。
  4. 根据权利要求1-3任一所述的压力检测装置，其特征在于，所述应力承载板设有的开孔包括与所述传感器薄膜上设有的所述传感器单元一一对应的第三开孔，每一对相互对应的传感器单元和第三开孔中，所述传感器单元的所述第二电阻和所述第三电阻在所述应力承载板朝向所述传感器薄膜一侧表面上的投影位于所述第三开孔区域内。
  5. 根据权利要求1-4任一所述的压力检测装置，其特征在于，所述应力承载板的杨氏模量大于所述传感器薄膜的杨氏模量。
  6. 根据权利要求1-5任一所述的压力检测装置，其特征在于，所述传感器薄膜设于所述应力承载板朝向所述受力板的一侧或者设于所述应力承载板背离所述受力板的一侧。
  7. 根据权利要求1-6任一所述的压力检测装置，其特征在于，所述传感器薄膜设有所述第二电阻和所述第三电阻的位置周边区域的厚度小于所述传感器薄膜其他位置的厚度。
  8. 根据权利要求1-7任一所述的压力检测装置，其特征在于，所述传感器薄膜在设有所述第二电阻和所述第三电阻的位置的周边区域设有不连续的开槽。
  9. 根据权利要求1-8任一所述的压力检测装置，其特征在于，所述传感器薄膜在设有所述第一电阻和所述第四电阻的位置粘结于所述应力承载板。
  10. 根据权利要求1-9所述的压力检测装置，其特征在于，所述薄膜在设有所述第二电阻和所述第三电阻的位置周边通过泡棉粘结于所述受力板。
  11. 一种显示屏，包括屏幕，其特征在于，还包括如权利要求1-10任一项所述的压力检测装置。
  12. 一种触控电子设备，包括存储器、处理器，其特征在于，还包括如权利要求1-10任一项所述的压力检测装置，其中：
    所述处理器与所述压力检测装置以及存储器信号连接，用于根据所述压力检测装置检测的信号生成触控信号，并且根据所述存储器内预先存储的触控信号与相应操作的对应关系控制所述触控电子设备进行动作。
PCT/CN2017/078855 2016-06-27 2017-03-30 一种触摸压力检测装置、显示屏及触控电子设备 WO2018000874A1 (zh)

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