CN218240875U - Piezoelectric module, touch device and electronic equipment - Google Patents

Abstract

The utility model relates to a piezoelectricity touch-control field discloses a piezoelectricity module, touch device and electronic equipment. This piezoelectric module includes the piezoelectric layer, first electrode layer, the second electrode layer, the piezoelectricity calibration layer, third electrode layer and receiver, the piezoelectric layer is equipped with a plurality of piezoelectricity regions, the piezoelectric constant in each piezoelectricity region is different, the one side of piezoelectric layer is located to first electrode layer and is connected with the piezoelectric layer electricity, the one side that the piezoelectric layer deviates from first electrode layer is located to the second electrode layer is connected with the piezoelectric layer electricity, the one side that first electrode layer deviates from the piezoelectric layer is located to the piezoelectricity calibration layer, the piezoelectric constant of piezoelectricity calibration layer is unequal with the piezoelectric constant in each piezoelectricity region, the one side that the piezoelectricity calibration layer deviates from first electrode layer is located to the third electrode layer and is connected with piezoelectricity calibration layer electricity, the receiver includes first portion of connecting electricity, second portion of connecting electricity and third portion of connecting electricity, respectively with first electrode layer, second electrode layer and third electrode layer electricity are connected. The number of detection pins of the receiver is small.

Description

Piezoelectric module, touch device and electronic equipment

Technical Field

The utility model relates to a piezoelectricity touch-control field especially relates to a piezoelectricity module, touch device and electronic equipment.

Background

In the related art, the electrode structure of the piezoelectric module mainly includes two types, i.e., an independently controlled type and a positioning type. If the independent control mode is adopted, each piezoelectric area needs to be controlled by a pair of positive electrodes and negative electrodes, the receiver needs to be provided with a plurality of corresponding detection pins to detect electric signals of each pair of positive electrodes and negative electrodes, and the number of the detection pins of the receiver is too large. If the positioning type is adopted, each piezoelectric area needs to be controlled by a corresponding row electrode and a corresponding column electrode, the row electrode and the column electrode need to be respectively provided with a positive electrode and a negative electrode, and a detection pin of the receiver detects electric signals of each pair of the row electrode and the column electrode. That is to say, the number of detection pins of the receiver of the piezoelectric module in the related art is large, the binding process of the detection pins is complicated, the risk of pin failure is large, the risk of charge crosstalk generated between the detection pins is large, and the trigger delay time is long.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model discloses piezoelectric module, touch device and electronic equipment, the quantity of the detection pin of receiver is less, has simplified the process of binding that detects the pin, has reduced the detection pin risk of becoming invalid, has reduced the electric charge between the detection pin and has crosstalked, has reduced and has triggered delay time.

In a first aspect, the utility model discloses a piezoelectric module, the piezoelectric module includes piezoelectric layer, first electrode layer, second electrode layer, piezoelectricity calibration layer, third electrode layer and receiver, the piezoelectric layer is equipped with a plurality of piezoelectricity regions, each piezoelectricity region's piezoelectric constant is different; the first electrode layer is arranged on one surface of the piezoelectric layer and is electrically connected with the piezoelectric layer; the second electrode layer is arranged on one surface of the piezoelectric layer, which is far away from the first electrode layer, and is electrically connected with the piezoelectric layer, and the polarity of the second electrode layer is opposite to that of the first electrode layer; the piezoelectric calibration layer is arranged on one side, away from the piezoelectric layer, of the first electrode layer, and the piezoelectric constant of the piezoelectric calibration layer is different from that of each piezoelectric area; the third electrode layer is arranged on one surface of the piezoelectric calibration layer, which is far away from the first electrode layer, and is electrically connected with the piezoelectric calibration layer, and the polarity of the third electrode layer is the same as that of the second electrode layer; the receiver comprises a first electricity connection part, a second electricity connection part and a third electricity connection part, wherein the first electricity connection part is electrically connected with the first electrode layer, the second electricity connection part is electrically connected with the second electrode layer, and the third electricity connection part is electrically connected with the third electrode layer.

The piezoelectric calibration layer and the piezoelectric calibration layer share the first electrode layer, the first electrode layer and the second electrode layer are respectively electrically connected with a first connection part and a second connection part of the receiver, the third electrode layer is electrically connected with a third connection part of the receiver, the receiver can simultaneously receive a voltage signal generated by the piezoelectric calibration layer and a voltage signal generated by a triggered piezoelectric region, the piezoelectric regions at the same position are triggered to generate voltage signals with different sizes each time due to different pressure of each time of triggering of a user, the piezoelectric constants of the piezoelectric calibration layer are different from the piezoelectric constants of the piezoelectric regions, so that the piezoelectric calibration layer can correspondingly generate different voltage signals when triggering different pressure sizes for multiple times, the voltage signals generated by the triggered piezoelectric region and the piezoelectric calibration layer are in a fixed proportional relationship each time when the piezoelectric regions at the same position are triggered for multiple times, the piezoelectric constants of the piezoelectric calibration layer are different from the piezoelectric signals generated by the triggered region and the piezoelectric calibration layer, and the trigger voltage signals generated by the triggered piezoelectric calibration layer are accurately positioned according to the proportional relationship between the triggering voltage signals generated by the triggering regions. Meanwhile, the receiver can respectively detect the piezoelectric signals of the piezoelectric areas and the piezoelectric calibration layer by adopting at least 3 detection pins, the detection pins of the receiver are fewer, the binding process of the detection pins is simplified, the failure risk of the detection pins is reduced, the charge crosstalk among the detection pins is reduced, and the trigger delay time is shortened.

As an optional implementation manner, the piezoelectric module further includes a fourth electrode layer and a fourth electrical connection portion, the fourth electrode layer is disposed on the surface of the piezoelectric calibration layer departing from the third electrode layer and electrically connected to the piezoelectric calibration layer, the receiver further includes the fourth electrical connection portion, and the fourth electrical connection portion is electrically connected to the fourth electrode layer.

Therefore, the piezoelectric calibration layer can independently receive the voltage signal of the piezoelectric calibration layer through the third electrode layer and the fourth electrode layer, and does not need to share the second electrode layer with the piezoelectric layer, so that the voltage signals of the piezoelectric layer and the piezoelectric calibration layer are not interfered with each other.

As an optional implementation manner, the piezoelectric module further includes a pressure buffer layer, the pressure buffer layer is disposed on a side of the second electrode layer facing away from the piezoelectric layer, and a young modulus of the pressure buffer layer is smaller than a young modulus of the piezoelectric layer.

Because the Young modulus of the pressure buffer layer is smaller than that of the piezoelectric layer, the pressure buffer layer is made of a softer material, when the applied pressure is removed, the force which is required to be applied to the piezoelectric layer and is required to be restored to the balance state of the piezoelectric layer becomes smoother, the voltage generated by the applied pressure on the piezoelectric layer and the voltage generated by the removed pressure meet a good linear relation, and the accuracy and the stability of the pressure measurement and calculation are ensured.

As an optional implementation manner, the pressure buffer layer is disposed on a side of the third electrode layer facing away from the piezoelectric alignment layer, and the young modulus of the pressure buffer layer is smaller than the young modulus of the piezoelectric alignment layer.

Because the Young modulus of the pressure buffer layer is smaller than that of the piezoelectric calibration layer, the pressure buffer layer is made of soft materials, when the applied pressure is removed, the force which is required to be applied to the piezoelectric layer and is required to be restored to the balance state by the piezoelectric calibration layer becomes more gentle, the voltage generated by the applied pressure on the piezoelectric calibration layer and the voltage generated by the pressure removal meet a good linear relation, and the accuracy and the stability of the pressure measurement and calculation are ensured.

As an optional implementation manner, the pressure buffer layer is provided with a plurality of through holes, and the through holes correspond to the piezoelectric regions one to one.

The piezoelectric film in the piezoelectric area can be bent and deformed under the action of trigger pressure, the through holes can increase the deformation space of the corresponding piezoelectric film, and the deformation effect of the piezoelectric film in the piezoelectric area is enhanced.

In an alternative embodiment, a plurality of the piezoelectric regions are arranged in an array on the piezoelectric layer.

So, a plurality of piezoelectricity regions are even arranges on the piezoelectric layer to also evenly distributed with a plurality of touch-control positions of a plurality of piezoelectricity region one-to-one, be favorable to the mode of arranging of touch-control position to design simply, easily production.

As an alternative embodiment, a plurality of said piezoelectric regions are evenly spaced apart on said piezoelectric layer.

Therefore, the touch positions corresponding to the piezoelectric regions one to one are distributed at even intervals, manual triggering of the touch positions is facilitated, interference among the touch positions cannot be generated, and triggering accuracy of the piezoelectric regions is facilitated.

As an alternative embodiment, the areas of the plurality of piezoelectric regions are the same.

Therefore, the sensing areas of the touch positions corresponding to the piezoelectric regions one to one are the same, so that the sensing areas of the touch positions can be triggered manually to be consistent, and the accuracy of triggering the piezoelectric regions can be improved.

In a second aspect, the present application further discloses a touch device, where the touch device includes a touch layer and the piezoelectric module of the first aspect, and the touch layer is located on one side of the piezoelectric calibration layer, which is deviated from the third electrode layer.

The touch device with the piezoelectric module is adopted, and has all the beneficial effects of the piezoelectric module.

In a third aspect, the application further discloses an electronic device, which includes a device body and the touch device of the second aspect, where the touch device is connected to the device body.

The electronic equipment with the touch device has the advantages of all the piezoelectric modules.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the piezoelectric calibration layer and the piezoelectric layer share the first electrode layer, the first electrode layer and the second electrode layer are respectively electrically connected with a first electrical connection part and a second electrical connection part of a receiver, a third electrode layer is electrically connected with a third electrical connection part of the receiver, the receiver can simultaneously receive a voltage signal generated by the piezoelectric calibration layer and a voltage signal generated by a triggered piezoelectric region, the piezoelectric regions at the same position can generate voltage signals with different magnitudes each time due to different triggering pressures of a user, the piezoelectric constants of the piezoelectric calibration layer and the piezoelectric regions are not equal, so that the piezoelectric calibration layer can correspondingly generate different voltage signals when triggering different pressures for multiple times, the voltage signals generated by the triggered piezoelectric region and the piezoelectric calibration layer are in a fixed proportional relationship each time when triggering the piezoelectric regions at the same position for multiple times, the piezoelectric constants of the piezoelectric calibration layer at different positions are different, the voltage signals generated by the triggered piezoelectric region and the piezoelectric calibration layer are in a different proportional relationship, and the calibration of the voltage signals generated by the triggered piezoelectric calibration layer and the piezoelectric calibration layer are accurately positioned according to the small proportional relationship of the triggering voltages generated by the piezoelectric calibration layer. Meanwhile, the receiver can respectively detect the piezoelectric signals of the piezoelectric areas and the piezoelectric calibration layer by adopting at least 3 detection pins, the detection pins of the receiver are fewer, the binding process of the detection pins is simplified, the failure risk of the detection pins is reduced, the charge crosstalk among the detection pins is reduced, and the trigger delay time is shortened.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a first structural schematic diagram of a piezoelectric module according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a piezoelectric layer according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a second piezoelectric module according to an embodiment of the present invention;

fig. 4 is a schematic view of a third structure of a piezoelectric module according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a fourth structure of a piezoelectric module according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a touch device disclosed in the second embodiment of the present invention;

fig. 7 is a block diagram of an electronic device disclosed in the third embodiment of the present invention.

Icon: 100. a piezoelectric module; 10. a piezoelectric layer; 20. a first electrode layer; 30. a second electrode layer; 11. a piezoelectric region; 40. a receiver; 41. a first electric connection part; 42. a second electric connection part; 50. a piezoelectric alignment layer; 60. a third electrode layer; 70. a fourth electrode layer; 43. a third electric connection part; 44. a fourth electric connection part; 80. a pressure buffer layer; 90. a through hole; 200. a touch device; 210. a touch layer; 300. an electronic device; 310. the equipment body.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the invention and its embodiments, and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used in other meanings besides orientation or positional relationship, for example, the term "upper" may also be used in some cases to indicate a certain attaching or connecting relationship. The specific meaning of these terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.

The technical solution of the present invention will be further described with reference to the following embodiments and the accompanying drawings.

The embodiment of the utility model discloses piezoelectric module 100, touch device 200 and electronic equipment 300, piezoelectric layer 10 through at this piezoelectric module 100 sets up a plurality of piezoelectricity regions 11, a plurality of piezoelectricity regions 11 sharing first electrode layer 20 and second electrode layer 30, piezoelectricity calibration layer 50 and piezoelectricity layer 10 sharing first electrode layer 20, the quantity of receiver 40's detection pin is less, the process of binding of detection pin has been simplified, the detection pin inefficacy risk has been reduced, reduce to detect electric charge crosstalk between the pin, the time delay that triggers has been reduced.

Example one

As shown in fig. 1, a piezoelectric module 100 according to an embodiment of the present invention includes a piezoelectric layer 10, a first electrode layer 20, a second electrode layer 30, a piezoelectric calibration layer 50, a third electrode layer 60, and a receiver 40, where the piezoelectric layer 10 has a plurality of piezoelectric regions 11, and piezoelectric constants of the piezoelectric regions 11 are different; the first electrode layer 20 is arranged on one surface of the piezoelectric layer 10 and is electrically connected with the piezoelectric layer 10; the second electrode layer 30 is arranged on the surface of the piezoelectric layer 10, which is far away from the first electrode layer 20, and is electrically connected with the piezoelectric layer 10, and the polarity of the second electrode layer 30 is opposite to that of the first electrode layer 20; the piezoelectric alignment layer 50 is arranged on the side, away from the piezoelectric layer 10, of the first electrode layer 20, and the piezoelectric constant of the piezoelectric alignment layer 50 is different from that of each piezoelectric area 11; the third electrode layer 60 is arranged on one surface of the piezoelectric alignment layer 50, which is far away from the first electrode layer 20, and is electrically connected with the piezoelectric alignment layer 50, and the polarity of the third electrode layer 60 is the same as that of the second electrode layer 30; the receiver 40 includes a first contact portion 41, a second contact portion 42, and a third contact portion 43, the first contact portion 41 being electrically connected to the first electrode layer 20, the second contact portion 42 being electrically connected to the second electrode layer 30, and the third contact portion 43 being electrically connected to the third electrode layer 60.

The piezoelectric layer 10 is formed of a piezoelectric material, the piezoelectric material includes piezoelectric ceramic or Polyvinylidene fluoride (PVDF), and when the piezoelectric layer 10 is subjected to an external force, the piezoelectric layer 10 is mechanically deformed, and bound charges with positive and negative signs appear on the piezoelectric layer 10 after the mechanical deformation, so as to generate an electrical signal. In this way, the piezoelectric layer 10 can generate an electrical signal in response to the touch operation of the user after sensing the touch operation of the user. The receiver 40 is provided with a detection chip (not identified) for receiving the electrical signal generated by the piezoelectric layer 10, and the first electrical connection part 41 and the second electrical connection part 42 are detection pins of the detection chip (not identified), respectively.

In the present embodiment, a plurality of piezoelectric regions 11 are disposed on a piezoelectric layer 10, the plurality of piezoelectric regions 11 share a first electrode layer 20 and a second electrode layer 30, a piezoelectric calibration layer 50 shares the first electrode layer 20 with the piezoelectric layer 10, the first electrode layer 20 and the second electrode layer 30 are electrically connected to a first electrical connection portion 41 and a second electrical connection portion 42 of a receiver 40, and a third electrode layer 60 is electrically connected to a third electrical connection portion 43 of the receiver 40, so that the receiver 40 can simultaneously receive a voltage signal generated by the piezoelectric calibration layer 50 and a voltage signal generated by a triggered piezoelectric region 11, since the pressure magnitude triggered by a user is different each time, a voltage signal with a different magnitude is generated each time when the piezoelectric calibration layer 11 triggers with the same pressure magnitude, the voltage signals generated by the triggered piezoelectric region 11 and the piezoelectric calibration layer 50 generate different voltage signals corresponding to different pressure magnitudes each time, when the piezoelectric calibration layer 11 triggers with the same position multiple times, the voltage signals generated by the triggered piezoelectric calibration layer 11 and the calibration layer 50 generate different voltage magnitudes each time in a fixed proportional relationship, when the piezoelectric calibration layer 11 triggers with different positions trigger the piezoelectric calibration layer 11, and the piezoelectric calibration layer 11 generates different voltage magnitudes in a correct proportional relationship according to the triggering voltages generated by the piezoelectric calibration layer 11. Meanwhile, the receiver 40 can respectively detect the piezoelectric signals of the piezoelectric regions 11 and the piezoelectric calibration layer 50 by adopting at least 3 detection pins, the number of the detection pins of the receiver 40 is small, the binding process of the detection pins is simplified, the failure risk of the detection pins is reduced, the charge crosstalk between the detection pins is reduced, and the trigger delay time is shortened.

Alternatively, the first electrode layer 20 and the second electrode layer 30 are electrically connected to the first electrical connection part 41 and the second electrical connection part 42 through a circuit, which may be a lead or a flexible circuit board.

Alternatively, the piezoelectric material on the piezoelectric layer 10 is composed of a piezoelectric film, the piezoelectric layer 10 is provided with a plurality of piezoelectric regions 11, each piezoelectric region 11 obtains a different piezoelectric constant by a different polarization mode, and the portion of the interval between each piezoelectric region 11 is an unpolarized piezoelectric film.

As shown in fig. 2, in some embodiments, a plurality of piezoelectric regions 11 are arranged in an array on the piezoelectric layer 10. Therefore, the piezoelectric regions 11 are uniformly distributed on the piezoelectric layer 10, so that the touch positions corresponding to the piezoelectric regions 11 one to one are also uniformly distributed, and the arrangement mode of the touch positions is simple in design and easy to produce.

Illustratively, the piezoelectric layer 10 has 9 piezoelectric regions distributed in total, and the 9 piezoelectric regions are distributed like a 9-grid shape.

In some embodiments, the plurality of piezoelectric regions 11 are evenly spaced across the piezoelectric layer 10. Therefore, the touch positions corresponding to the piezoelectric regions 11 one to one are also distributed at even intervals, so that the touch positions can be triggered manually without interference, and the accuracy of triggering the piezoelectric regions 11 is facilitated.

In some embodiments, the areas of the plurality of piezoelectric regions 11 are the same. Therefore, the sensing areas of the touch positions corresponding to the piezoelectric regions 11 one by one are the same, so that the sensing areas of the touch positions triggered manually are kept consistent, and the accuracy of triggering the piezoelectric regions 11 is facilitated.

The piezoelectric layer 10 of the present application is provided with a plurality of piezoelectric regions 11, and as shown in fig. 2, the number of the piezoelectric regions 11 is 9 in total, and the description is given by way of example of 5 piezoelectric regions 11 and the piezoelectric constant D33 of the piezoelectric alignment layer 50.

Piezoelectric constants D33 of piezoelectric region 1, piezoelectric region 2, piezoelectric region 3, piezoelectric region 4, and piezoelectric region 5 in table one below were 10pC/N, 12pC/N, 14pC/N, 16pC/N, 18pC/N, respectively, and piezoelectric constant D33 of piezoelectric alignment layer 50 was 28pC/N. The voltage signal of the piezoelectric alignment layer 50 has slight fluctuation within 0.1V when the voltage signal is detected under the same pressing pressure.

Watch 1

When different piezoelectric regions 11 are triggered with the same pressure in the above table one, the voltage signal generated by each piezoelectric region 11 is different, thereby realizing the identification of the trigger position. For example, the voltage generated when piezoelectric region 11 was triggered with a pressure of 3N was 0.4924V, while the voltage generated when piezoelectric region 2 was similarly triggered with a pressure of 3N was 0.6034V, and the voltage generated when piezoelectric region 3 was triggered was 0.7031V. When the same piezoelectric region 11 is triggered by a plurality of triggers, the voltage signals generated by the piezoelectric region 11 and the piezoelectric alignment layer 50 are in a fixed proportional relationship each time. For example, triggering piezoelectric region 5 with pressures of 2N, 3N, and 5N, respectively, yields a voltage across piezoelectric region 11 divided by the voltage across piezoelectric alignment layer 50 with relatively close ratios of 0.6301, 0.6508, and 0.6422, respectively, for each trigger. When different piezoelectric regions 11 are triggered with different pressures, the voltage signals generated by the different piezoelectric regions 11 and the piezoelectric alignment layer 50 are in different proportional relationships, for example, triggering the piezoelectric region 1 with 3N results in a ratio of the voltage of the piezoelectric region 11 divided by the voltage of the piezoelectric alignment layer 50 of 0.3538, and triggering the piezoelectric region 5 with 5N results in a ratio of the voltage of the piezoelectric region 11 divided by the voltage of the piezoelectric alignment layer 50 of 0.6422. The receiver 40 obtains different piezoelectric signals of the piezoelectric region 11 and the piezoelectric calibration layer 50 under different pressure magnitudes. According to the difference of the voltage signals, the action of the force on which the piezoelectric area 11 is acted can be known, so that the pressed position of the piezoelectric module 100 is judged, and the positioning of the trigger position is realized.

As shown in fig. 3, in some embodiments, the piezoelectric module 100 further includes a fourth electrode layer 70 and a fourth electrical connection portion 44, the fourth electrode layer 70 is disposed on a surface of the piezoelectric alignment layer 50 facing away from the third electrode layer 60 and electrically connected to the piezoelectric alignment layer 50, and the receiver 40 further includes the fourth electrical connection portion 44, and the fourth electrical connection portion 44 is electrically connected to the fourth electrode layer 70.

In this way, the piezoelectric alignment layer 50 can receive the voltage signal of the piezoelectric alignment layer 50 independently from the third electrode layer 60 and the fourth electrode layer 70, and the first electrode layer 20 is not shared with the piezoelectric layer 10, so that the voltage signals of the piezoelectric layer 10 and the piezoelectric alignment layer 50 do not interfere with each other.

As shown in fig. 4, the piezoelectric module 100 further includes a pressure buffer layer 80, the pressure buffer layer 80 is disposed on a side of the second electrode layer 30 opposite to the piezoelectric layer 10, and a young modulus of the pressure buffer layer 80 is smaller than a young modulus of the piezoelectric layer 10.

Young's modulus is a physical quantity that describes the ability of a solid material to resist deformation, also known as tensile modulus. The magnitude of the Young's modulus indicates the rigidity of the material, and the larger the Young's modulus, the less likely it will deform. Because the young modulus of the pressure buffer layer 80 is smaller than the young modulus of the piezoelectric layer 10, the pressure buffer layer 80 is made of a softer material, when the applied pressure is removed, the pressure applied to the piezoelectric layer 10 required for restoring the piezoelectric layer 10 to the balance state becomes gentler, and the voltage generated by the applied pressure on the piezoelectric layer 10 and the voltage generated by the removed pressure meet a good linear relation, so that the accuracy and the stability of pressure measurement and calculation are ensured.

Optionally, as shown in fig. 5, a pressure buffer layer 80 is disposed on a side of the third electrode layer 60 facing away from the piezoelectric alignment layer 50, and a young modulus of the pressure buffer layer 80 is smaller than a young modulus of the piezoelectric alignment layer 50.

Because the young's modulus of the pressure buffer layer 80 is smaller than the young's modulus of the piezoelectric calibration layer 50, the pressure buffer layer is made of a softer material, when the applied pressure is removed, the force which is required to be applied to the piezoelectric calibration layer 50 and is required to be restored to the balance state by the piezoelectric calibration layer 50 becomes more gentle, and the voltage generated by the applied pressure on the piezoelectric calibration layer 50 and the voltage generated by the removed pressure meet a good linear relation, so that the accuracy and the stability of pressure measurement and calculation are ensured.

As shown in fig. 4 and 5, in some embodiments, the pressure buffer layer 80 is provided with a plurality of through holes 90, and the plurality of through holes 90 correspond to the plurality of piezoelectric regions 11 one to one.

The piezoelectric film in the piezoelectric area 11 can be bent and deformed under the action of the trigger pressure, and the through holes 90 can increase the deformation space of the corresponding piezoelectric film, so that the deformation effect of the piezoelectric film in the piezoelectric area 11 is enhanced.

In the first embodiment of the disclosure, the piezoelectric layer 10 is provided with the plurality of piezoelectric regions 11, the plurality of piezoelectric regions 11 share the first electrode layer 20 and the second electrode layer 30, and the first electrode layer 20 and the second electrode layer 30 are respectively electrically connected to the first electrical connection portion 41 and the second electrical connection portion 42 of the receiver 40, so that the receiver can detect the piezoelectric signals of each piezoelectric region 11 of the piezoelectric layer 10 by using at least 2 detection pins, and the number of detection pins of the receiver 40 is small, thereby simplifying the binding process of the detection pins, reducing the failure risk of the detection pins, reducing the charge crosstalk between the detection pins, and reducing the trigger delay time.

Example two

As shown in fig. 6, the touch device 200 according to the second embodiment of the present invention includes a touch layer 210 and the piezoelectric module 100 according to the first embodiment, wherein the touch layer 210 of the touch device 200 is disposed on a side of the third electrode layer 60 away from the piezoelectric alignment layer 50. Each piezoelectric region 11 on the piezoelectric layer 10 of the piezoelectric module 100 and the piezoelectric alignment layer 50 generate touch feedback when receiving an input from the touch layer 210.

The touch device 200 disclosed in the second embodiment adopts the piezoelectric module 100 described in the first embodiment, and the touch device 200 has all the advantages of the piezoelectric module 100 described above.

EXAMPLE III

Fig. 7 is an electronic device 300 according to an embodiment of the present invention, the electronic device 300 includes a device body 310 and a touch device 200 according to an embodiment of the second aspect, and the touch device 200 is connected to the device body 310.

In an embodiment, the electronic device 300 may include a notebook computer, a smart phone, a vehicle-mounted terminal, and the like, wherein the touch device 200 may be used for a touch panel, a keyboard of the notebook computer, a touch panel of the vehicle-mounted terminal, a side frame touch key of the smart phone, and the like, which require touch feedback and pressure sensing.

According to the electronic device 300 of the embodiment of the present invention, by using the touch device 200 of the second embodiment, the piezoelectric module 100 has all the advantages as described above.

The piezoelectric module, the touch device and the electronic device disclosed in the embodiments of the present invention are described in detail above, and specific examples are applied herein to explain the principles and embodiments of the present invention, and the description of the above embodiments is only used to help understand the core ideas of the piezoelectric module, the touch device and the electronic device of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, and in summary, the content of the present specification should not be understood as the limitation of the present invention.

Claims (10)

1. A piezoelectric module, comprising:

the piezoelectric layer is provided with a plurality of piezoelectric areas, and the piezoelectric constants of the piezoelectric areas are different;

the first electrode layer is arranged on one surface of the piezoelectric layer and is electrically connected with the piezoelectric layer;

the second electrode layer is arranged on one surface of the piezoelectric layer, which is far away from the first electrode layer, and is electrically connected with the piezoelectric layer, and the polarity of the second electrode layer is opposite to that of the first electrode layer;

the piezoelectric calibration layer is arranged on one side, away from the piezoelectric layer, of the first electrode layer, and the piezoelectric constant of the piezoelectric calibration layer is different from that of each piezoelectric area;

the third electrode layer is arranged on one surface, away from the first electrode layer, of the piezoelectric calibration layer and is electrically connected with the piezoelectric calibration layer, and the polarity of the third electrode layer is the same as that of the second electrode layer;

the receiver comprises a first electric connection part, a second electric connection part and a third electric connection part, wherein the first electric connection part is electrically connected with the first electrode layer, the second electric connection part is electrically connected with the second electrode layer, and the third electric connection part is electrically connected with the third electrode layer.

2. The piezoelectric module of claim 1, further comprising a fourth electrode layer and a fourth electrical connection portion, wherein the fourth electrode layer is disposed on a surface of the piezoelectric calibration layer facing away from the third electrode layer and electrically connected to the piezoelectric calibration layer, and the receiver further comprises the fourth electrical connection portion electrically connected to the fourth electrode layer.

3. The piezoelectric module of claim 1 further comprising a pressure buffer layer disposed on a side of the second electrode layer facing away from the piezoelectric layer, wherein a young's modulus of the pressure buffer layer is less than a young's modulus of the piezoelectric layer.

4. The piezoelectric module of claim 3, wherein the pressure buffer layer is disposed on a side of the third electrode layer facing away from the piezoelectric alignment layer, and the Young's modulus of the pressure buffer layer is smaller than that of the piezoelectric alignment layer.

5. The piezoelectric module according to any one of claims 3 and 4, wherein the pressure buffer layer is provided with a plurality of through holes, and the plurality of through holes correspond to the plurality of piezoelectric regions one to one.

6. The piezoelectric module of claim 1 wherein a plurality of the piezoelectric regions are arranged in an array on the piezoelectric layer.

7. The piezoelectric module of claim 1 wherein the plurality of piezoelectric regions are evenly spaced across the piezoelectric layer.

8. The piezoelectric module of claim 1, wherein the areas of the plurality of piezoelectric regions are the same.

9. Touch device, characterized in that the touch device comprises a touch layer and a piezoelectric module according to any one of claims 1 to 8, wherein the touch layer is arranged on a side of the third electrode layer facing away from the piezoelectric alignment layer.

10. An electronic apparatus, characterized in that the electronic apparatus comprises an apparatus body and the touch device of claim 9, the touch device being connected to the apparatus body.

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