WO2022147887A1 - 触控板和电子设备 - Google Patents

触控板和电子设备 Download PDF

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Publication number
WO2022147887A1
WO2022147887A1 PCT/CN2021/076103 CN2021076103W WO2022147887A1 WO 2022147887 A1 WO2022147887 A1 WO 2022147887A1 CN 2021076103 W CN2021076103 W CN 2021076103W WO 2022147887 A1 WO2022147887 A1 WO 2022147887A1
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WO
WIPO (PCT)
Prior art keywords
touch panel
piezoelectric ceramic
ceramic sheet
panel according
fixed
Prior art date
Application number
PCT/CN2021/076103
Other languages
English (en)
French (fr)
Inventor
张�荣
罗忠波
阎小霞
鲁旭
Original Assignee
深圳市汇顶科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 深圳市汇顶科技股份有限公司 filed Critical 深圳市汇顶科技股份有限公司
Priority to US17/483,735 priority Critical patent/US11789557B2/en
Publication of WO2022147887A1 publication Critical patent/WO2022147887A1/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
    • 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
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
    • 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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means

Definitions

  • the embodiments of the present application relate to the field of electronic technologies, and in particular, to a touch panel and an electronic device.
  • a touchpad is an input device used in electronic equipment to control a screen cursor.
  • the touchpad obtains touch information such as high-resolution finger coordinates by detecting the tiny capacitance changes when the user's finger operates on the panel area, so as to precisely control the screen cursor to move and click.
  • touch information such as high-resolution finger coordinates by detecting the tiny capacitance changes when the user's finger operates on the panel area, so as to precisely control the screen cursor to move and click.
  • a single button is also configured on the back of the touchpad, and the functions of the traditional left and right mouse buttons are realized by detecting the behavior of the buttons.
  • the pressure touchpad cancels the physical buttons of the conventional trackpad and adds pressure sensitivity and vibration feedback.
  • piezoelectric ceramic-type pressure touch panels have problems such as small vibration, insufficient user experience, low pressure detection accuracy, and inability to detect continuous pressure.
  • the present application provides a touch panel and an electronic device, which are conducive to improving the pressure detection accuracy of the touch panel, can detect continuous pressure, and have a good vibration feedback effect, thereby improving user experience.
  • a touch panel including: a touch panel; a plurality of pressure sensors fixed on an elastic support for detecting the pressure on the touch panel; a piezoelectric ceramic component, including a piezoelectric ceramic sheet, The piezoelectric ceramic sheet is used to provide vibration feedback to the user, wherein the piezoelectric ceramic component is suspended and fixed under the touch panel to be isolated from the elastic support.
  • the piezoelectric ceramic sheet provides vibration feedback
  • using a pressure sensor for pressure detection can not only improve the pressure detection accuracy, but also detect continuous pressure. Isolation from the elastic bracket used to support the pressure sensor not only makes the vibration of the piezoelectric ceramic sheet not affect the pressure detection of the pressure sensor, but also the piezoelectric ceramic sheet has a stronger vibration sense and a better user experience. Moreover, due to the use of piezoelectric ceramic sheets as the vibration source, the structure is lighter and thinner, and the vibration sensation is more crisp and rich.
  • the touchpad further includes:
  • the fixing structure is used for suspending and fixing the piezoelectric ceramic component under the touch panel.
  • the piezoelectric ceramic sheet is suspended and fixed under the touch panel by a fixed structure, which is low-cost and easy to install.
  • the piezoelectric ceramic sheet includes a piezoelectric ceramic, a metal substrate and an electrode; two ends of the metal substrate protrude from the piezoelectric ceramic and the electrode, and the metal substrate Both ends of the sheet are fixed under the touch panel by the fixing structure.
  • the two ends of the metal substrate protrude from the piezoelectric ceramic and the electrodes, the two ends of the metal substrate are fixed under the touch panel through the fixing structure, so that the piezoelectric ceramic component can be suspended and fixed under the touch panel.
  • the piezoelectric ceramic component further includes: a weight block, fixed on the bottom of the piezoelectric ceramic sheet, for increasing the vibration strength of the piezoelectric ceramic sheet.
  • the counterweight can increase the force between the piezoelectric ceramic sheet and the circuit board or reinforcing plate below the touch panel, thereby increasing the vibration intensity of the piezoelectric ceramic sheet and making the vibration sound smaller.
  • the weight block adopts a rectangular block with a first groove, and the piezoelectric ceramic sheet is arranged in the first groove.
  • the thickness of the touch panel can be further reduced by arranging the piezoelectric ceramic sheet in the groove of the weight block.
  • the weight block is fixed at or near the center of gravity of the piezoelectric ceramic sheet.
  • the configuration block is a copper block, a lead block or a steel block.
  • the mass range of the counterweight is between 2.4g-2.6g.
  • the distance between the fixing structure and the piezoelectric ceramic is greater than or equal to 0.1 mm.
  • a certain gap is maintained between the fixed structure and the piezoelectric ceramic, so that the fixed structure will not affect the vibration of the piezoelectric ceramic sheet.
  • the piezoelectric ceramic sheet includes piezoelectric ceramics, a metal substrate and an electrode; one end of the metal substrate is fixed under the touch panel through the fixing structure.
  • one end of the metal substrate protrudes from the piezoelectric ceramic and the electrode, and one end of the metal substrate and one end of the piezoelectric ceramic are simultaneously fixed by the fixing structure below the touch panel.
  • one end of the metal substrate protrudes from the piezoelectric ceramic and the electrodes, one end of the metal substrate is fixed under the touch panel through the fixing structure, so that the piezoelectric ceramic component can be suspended and fixed under the touch panel.
  • the fixing structure includes glue, double-sided tape, screws, snaps or solder.
  • the piezoelectric ceramic component may be fixed under the touch panel by fixing means such as glue, double-sided tape, screws, snaps or welding.
  • the welding may include welding by soldering or spot welding by laser.
  • the thickness of the fixing structure ranges from 0.4 mm to 0.6 mm.
  • the fixed structure maintains a certain thickness. On the one hand, it will not cause the piezoelectric ceramic sheet to contact the touch panel when it vibrates because it is too thin, and on the other hand, it will not increase the thickness of the touch panel because it is too thick.
  • the length of the piezoelectric ceramic sheet is between 49 mm and 51 mm, and the width of the piezoelectric ceramic sheet is between 5 mm and 7 mm.
  • the touch panel includes a piezoelectric ceramic sheet, the piezoelectric ceramic sheet is arranged at the center of the touch panel, and the installation direction of the piezoelectric ceramic sheet is parallel to on the long side or the short side of the touch panel.
  • the touch panel includes multiple piezoelectric ceramic sheets, and the multiple piezoelectric ceramic sheets are arranged side by side in the same direction, or a part of the multiple piezoelectric ceramic sheets is parallel are arranged side by side on the long side of the touch panel, and another part of the plurality of piezoelectric ceramic sheets are arranged side by side parallel to the short side of the touch panel.
  • Arranging a plurality of piezoelectric ceramic sheets can improve the vibration intensity.
  • the installation direction of the piezoelectric ceramic sheets can be parallel or inclined to any side of the touch panel, and the installation method is flexible. Placing a plurality of piezoelectric ceramic sheets evenly at the symmetrical positions of the touch panel can increase the consistency of the vibration intensity at different positions of the touch panel.
  • the touch panel includes four pressure sensors, and the projections of the four pressure sensors on the touch panel are respectively located at four corners of the touch panel, or, The projections of the four pressure sensors on the touch panel are respectively located at the center positions of the four sides in the touch panel.
  • the pressure sensor is fixed on the side of the touch panel, and the projection of the pressure sensor on the touch panel is located outside the area of the touch panel.
  • Fixing the pressure sensor on the side of the touch panel can make the thickness of the touch panel smaller.
  • the elastic support includes two short axes and one long axis, the two short axes are fixed to the edge area under the touch panel, and the pressure sensor is arranged on the short axis on the axis.
  • the long axis extends to the side of the touch panel so that the pressure sensor and the touch panel are located on the same plane.
  • the touchpad includes two elastic brackets, the two elastic brackets are arranged opposite to each other, and two pressure sensors are arranged on each of the elastic brackets.
  • the elastic support is provided with a second groove, the tops of the two side walls of the second groove are fixedly connected to the bottom of the touch panel, and the pressure sensor is fixed on the touch panel.
  • the bottom wall of the groove structure is provided.
  • the tops of the two side walls extend outward to form steps, and the upper surfaces of the steps are fixedly connected to the lower part of the touch panel.
  • the elastic bracket adopts a groove structure, and is connected with the touch panel through the outwardly extending step surface, which can enhance the structural strength.
  • a third groove is provided on the stack below the touch panel, and the tops of the two side walls of the second groove are fixed in the third groove.
  • Fixing the elastic support in the groove provided by the stack under the touch panel is beneficial to reduce the thickness of the touch panel.
  • the touch panel further includes: reinforcing plates, which are fixedly connected to the lower surfaces of both ends of the circuit board, and are used to increase the rigidity of the touch panel.
  • Using a reinforcing plate to increase the rigidity of the touch panel can reduce the deformation and collapse when the user presses the touch panel.
  • an electronic device including the first aspect and the touch panel in any implementation manner of the first aspect.
  • FIG. 1 is a schematic exploded view of a typical pressure touchpad.
  • FIG. 2 is a schematic block diagram of a touch panel according to an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a stack of a touch panel according to an embodiment of the present application.
  • FIG. 4 is another stacking schematic diagram of the touch panel according to the embodiment of the present application.
  • 5 to 8 show distribution diagrams of pressure sensors in the touch panel according to the embodiment of the present application.
  • FIG. 9 is a schematic principle diagram of vibration feedback of the piezoelectric ceramic sheet according to the embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a piezoelectric ceramic sheet according to an embodiment of the present application.
  • FIG. 11 is a schematic diagram of the installation of the piezoelectric ceramic sheet according to the embodiment of the present application.
  • FIG. 12 is another stacking schematic diagram of the touch panel according to the embodiment of the present application.
  • FIG. 13 is a schematic diagram of installation of a piezoelectric ceramic sheet according to another embodiment of the present application.
  • FIG. 14 is a schematic diagram of installation of a piezoelectric ceramic sheet according to another embodiment of the present application.
  • 15 to 17 are other structural schematic diagrams of the piezoelectric ceramic sheet according to the embodiment of the present application.
  • FIG. 18 to FIG. 19 are schematic diagrams showing the installation directions of the piezoelectric ceramic sheets according to the embodiments of the present application.
  • 20 to 23 are distribution diagrams of piezoelectric ceramic sheets according to embodiments of the present application.
  • 24 and 25 are bottom views of the touch panel according to the embodiment of the present application.
  • FIG. 26 is an exploded schematic diagram of the touch panel according to the embodiment of the present application.
  • FIG. 27 is an interaction diagram of the internal structure of the touch panel according to the embodiment of the present application.
  • a touchpad is an input device used in electronic equipment to control a screen cursor.
  • the touchpad obtains touch information such as high-resolution finger coordinates by detecting the tiny capacitance changes when the user's finger operates on the panel area, so as to precisely control the screen cursor to move and click.
  • touch information such as high-resolution finger coordinates by detecting the tiny capacitance changes when the user's finger operates on the panel area, so as to precisely control the screen cursor to move and click.
  • a single button is also configured on the back of the touchpad, and the functions of the traditional left and right mouse buttons are realized by detecting the behavior of the buttons.
  • the pressure touchpad refers to the cancellation of the physical buttons of the conventional touchpad, and the addition of pressure sensing and vibration feedback functions.
  • a typical pressure touchpad uses a linear motor touch scheme.
  • the linear motor touch solution mainly has the following problems:
  • the thickness of the structure is large. Occupies the internal battery space of electronic devices and cannot be applied to some thin and light electronic devices;
  • Another typical pressure touch panel uses a piezoelectric ceramic touch solution, which is becoming more and more popular due to its thinness and lightness.
  • the embodiments of the present application are implemented based on the piezoelectric ceramic touch control solution.
  • a typical pressure touch panel implemented based on the piezoelectric ceramic touch solution will be described below with reference to FIG. 1 .
  • FIG. 1 is an exploded schematic diagram of the pressure touch panel. From top to bottom in Figure 1 are the touch panel, foam, piezoelectric ceramic sheet, and flexible printed circuit (Flexible Printed Circuit, FPC), foam, insulating polyethylene terephthalate (Polyethylene terephthalate, PET) ) gasket, sheet metal bracket and the upper cover of the main unit.
  • FPC Flexible Printed Circuit
  • the touch panel may include a cover plate and a touch printed circuit board (Printed circuit board, PCB). Since the piezoelectric ceramic sheet can also perform pressure detection, the foam can also be called sensor foam.
  • the foam under the touch panel transmits the pressure to the piezoelectric ceramic sheet underneath, and the piezoelectric ceramic sheet generates an electrical signal under the positive piezoelectric effect.
  • the control chip receives the electrical signal Generate a driving signal, and drive the piezoelectric ceramic sheet to generate vibration.
  • the vibration is transmitted to the touch panel through the foam.
  • the upper and lower layers of the piezoelectric ceramic sheet are mainly used to buffer pressure and absorb vibration sound.
  • FPC is used to connect multiple piezoelectric The ceramic sheet transmits electrical signals to the control chip, and the sheet metal bracket and C shell play a supporting role.
  • the piezoelectric ceramic sheet Because the piezoelectric ceramic sheet generates a potential difference through the expansion and contraction between the foams, thereby generating an electrical signal for pressure detection, the pressure detection accuracy is low, and the continuous pressure cannot be detected.
  • a single piezoelectric ceramic sheet has a small vibration sense. , the user experience is insufficient, if you want to increase the vibration sense, you need to install multiple piezoelectric ceramic sheets, and these multiple piezoelectric ceramic sheets need to be driven separately, and the cost is high.
  • the embodiments of the present application provide a touch panel based on the above piezoelectric ceramic touch solution, which can solve the above problems.
  • portable or mobile computing devices such as smartphones, laptops, tablets, gaming devices, and other electronic devices such as electronic databases, automobiles, and bank automated teller machines (ATMs).
  • ATMs bank automated teller machines
  • the embodiments of the present application do not limit this.
  • FIG. 2 shows a schematic structural diagram of the touch panel 100 according to an embodiment of the present application.
  • the touch panel 100 includes:
  • a pressure sensor 102 configured to convert the deformation of the pressure sensor into a first electrical signal when the touch panel is under pressure, and the first electrical signal is used for pressure detection;
  • the elastic support 103 is used for supporting the pressure sensor, and when the touchpad is under pressure, it drives the pressure sensor to elastically deform together;
  • a piezoelectric ceramic assembly including a piezoelectric ceramic sheet 104, the piezoelectric ceramic sheet is used to provide vibration feedback to a user when the first electrical signal is greater than a first threshold, wherein the piezoelectric ceramic assembly is suspended and fixed on the The bottom of the touch panel is isolated from the elastic support.
  • the pressure is transmitted to the elastic support at the bottom, and the bending of the support will drive the pressure sensor it supports to elastically deform together, and then the pressure sensor converts the detected deformation into electrical
  • the signal is used for pressure detection; when it is detected that the electrical signal converted by the pressure sensor is greater than the first threshold, the piezoelectric ceramic sheet drives the touch panel to vibrate together, and the vibration is fed back to the user. Vibration feedback allows users to determine whether their presses are working, minimizing repetitive gestures.
  • the piezoelectric ceramic component is isolated from the elastic support, which means that the piezoelectric ceramic component is not in contact with the elastic support during the process from non-deformation to deformation of the elastic support; Below the touch panel means that the bottom of the piezoelectric ceramic component is not supported, and there is a gap between the piezoelectric ceramic component and the touch panel.
  • the first threshold is a specified threshold, which may be obtained through experience.
  • the first threshold may refer to a critical value of the pressing force at which the user can perceive vibration, and the first threshold is greater than 0.
  • the electronic device may store multiple threshold values of pressing force, and the user may select one of them according to usage habits.
  • the electronic device stores a threshold value of light pressing, a threshold value of moderate pressing, and a threshold value of heavy pressing, and the user can select a threshold value from among them according to his habitual pressing force.
  • the touch panel of the embodiment of the present application adopts the piezoelectric ceramic sheet as the vibration source, the structure is lighter and thinner, and the vibration sense is more crisp and rich. And under the condition of keeping the piezoelectric ceramic sheet to provide vibration feedback, using a pressure sensor for pressure detection can not only improve the pressure detection accuracy, but also detect continuous pressure.
  • the piezoelectric ceramic component is suspended and fixed under the touch panel. In isolation from the elastic bracket used to support the pressure sensor, not only the vibration of the piezoelectric ceramic sheet does not affect the pressure detection of the pressure sensor, but also the piezoelectric ceramic sheet has a stronger vibration sense and a better user experience, so that under the same vibration sense , reduce the number of piezoelectric ceramic sheets and reduce costs.
  • FIG. 3 shows a schematic diagram of a stack of the touch panel 100 provided by the embodiment of the present application.
  • the touch panel 100 includes:
  • the circuit board 105 which is fixedly connected to the lower surface of the touch panel, is used for processing the first electrical signal, and when the first electrical signal is greater than the first threshold, controls the piezoelectric ceramic sheet to move to any The user provides vibration feedback.
  • the circuit board 105 can be attached to the lower surface of the touch panel 101 , for example, the circuit board 105 is fixedly connected to the lower surface of the touch panel 101 through the adhesive 131 .
  • the circuit board 105 can be equipped with electronic components and circuits, and can be used to process electrical signals such as pressure and vibration to realize system setting functions.
  • the circuit board 105 may include a pressure detection chip, a piezoelectric ceramic chip, peripheral circuits, connectors and other main components.
  • the pressure detection chip can determine whether the first electrical signal collected by the pressure sensor reaches the first threshold, and if it reaches the first threshold, it sends a vibration command to the piezoelectric ceramic drive chip. After the piezoelectric ceramic drive chip receives the vibration command , drive the piezoelectric ceramic sheet to vibrate according to the set mode, the piezoelectric ceramic sheet drives the touch panel to vibrate together, and feedback the vibration to the user.
  • the touch panel 100 where it is located further includes:
  • the capacitance detection array is used to convert the capacitance signal obtained by the finger touch into a second electrical signal, and the second electrical signal is used for touch detection.
  • circuit board 105 can also be used to process the second electrical signal.
  • the circuit board 105 may further include a touch detection chip, and the touch detection chip and the pressure detection chip may be collectively referred to as a control chip.
  • the surface of the circuit board 105 may have a capacitance detection array composed of copper sheets.
  • the capacitance detection array converts the capacitance signal into an electrical signal and transmits it to the touch detection chip.
  • the touch detection chip and the pressure detection chip are combined into one, that is to say, a single chip can perform both pressure detection and touch detection, which reduces power consumption and simplifies the circuit structure. System cost is saved, and faster system response can be provided.
  • FIG. 4 shows another schematic diagram of the stacking of the touch panel 100 provided by the embodiment of the present application. Compared with FIG. 3 , the touch panel 100 in FIG. 4 further includes:
  • the reinforcing plates 108 are fixedly connected to the lower surfaces of both ends of the circuit board 105 for increasing the rigidity of the touch panel 101 .
  • the reinforcing plate 108 and the circuit board 105 can be attached by the adhesive 134, and the elastic bracket 103 can be attached to the lower surface of the reinforcing plate 108 by the adhesive 132.
  • the reinforcing plate adopts aluminum plate or steel plate.
  • Using the reinforcing plate to increase the rigidity of the touch panel 101 can reduce the deformation and collapse when the user presses the touch panel.
  • the elastic support 103 is fixed under the touch panel 101 .
  • the elastic bracket 103 is fixedly connected to the lower surface of the circuit board 105 .
  • the elastic support 103 is fixedly connected to the lower surface of the reinforcing plate 108 .
  • the elastic support 103 is provided with a second groove, the tops of the two side walls of the second groove are fixedly connected to the bottom of the touch panel 101, and the pressure sensor 102 is fixed on the first groove. Two grooves in the bottom wall.
  • the tops of the two side walls extend outward to form a step
  • the upper surface of the step is fixedly connected with the lower part of the touch panel 101
  • the pressure sensor 102 is fixed in the second groove
  • the upper surface of the step is fixedly connected to the lower surface of the circuit board 105
  • the upper surface of the step is fixedly connected to the lower surface of the reinforcing plate 108 .
  • the upper surface of the step can be fixedly connected to the lower surface of the circuit board 105 or the reinforcing plate 108 through the adhesive 132 .
  • the pressure sensor 102 can be fixedly connected to the bottom wall of the second groove of the elastic support through the adhesive 133 .
  • the stack below the touch panel 101 is provided with a third groove, and the tops of the two side walls of the second groove are fixed in the third groove.
  • the lower surface of the reinforcing plate 108 is provided with a third groove, and the tops of the two side walls are fixed in the third groove.
  • the two side walls of the elastic support can also adopt inclined surfaces.
  • the embodiment of the present application does not limit the specific shape of the elastic support, as long as it can support the pressure sensor, and can deform together with the pressure sensor when the touch panel is under pressure.
  • the number of elastic supports 103 may be one or multiple.
  • One pressure sensor 102 or multiple pressure sensors 102 can be placed on the bottom wall of an elastic support 103 . If the number of elastic brackets 103 is multiple, the multiple elastic brackets 103 can be independent parts, or can be connected as a whole and fixed on the edge regions of the four sides of the circuit board 105 .
  • the pressure sensor 102 is attached to the elastic bracket 103 , and when the elastic bracket 103 is bent and deformed, the pressure sensor 102 deforms along with the elastic bracket 103 .
  • the touchpad 100 includes a plurality of pressure sensors 102, and the projections of the plurality of pressure sensors 102 on the touch panel 101 are located at positions that can be located at at least one corner of the touch panel 101 and/or The center position of at least one side of the touch panel 101 .
  • the pressing force can be dispersed, thereby increasing the structural stability of the touch panel.
  • the plurality of pressure sensors are four pressure sensors 102 , and the projections of the four pressure sensors 102 on the touch panel 101 are located in the touch panel 101 , respectively. 4 corner positions.
  • the plurality of pressure sensors are four pressure sensors 102 , and the projections of the four pressure sensors 102 on the touch panel 101 are respectively located on four bars of the touch panel 101 . the center of the edge.
  • the plurality of pressure sensors are 6 pressure sensors 102 , and the projections of the 6 pressure sensors 102 on the touch panel 101 are respectively located on the touch panel 101 .
  • the position of the four corners and the center position of the two long sides of the touch panel 101 are respectively located on the touch panel 101 .
  • the plurality of pressure sensors are 8 pressure sensors 102
  • the projections of the 8 pressure sensors 102 on the touch panel 101 are located at four positions of the touch panel 101 respectively. The positions of the corners and the center positions of the four sides of the touch panel 101 .
  • Distributing the pressure sensors at the four corners and the center of the four sides of the touch panel can improve the uniformity of pressure detection.
  • the touch panel 101 can be used for the user to touch and press, and can also be used as an appearance decoration, generally using glass or mylar.
  • the pressure sensor 102 can be a piezoresistive pressure sensor.
  • the elastic support 103 may be a steel sheet or an aluminum sheet.
  • the touch panel 100 further includes:
  • the fixing structure 106 is used for suspending and fixing the piezoelectric ceramic component below the touch panel 101 .
  • the piezoelectric ceramic component is fixed on the lower surface of the circuit board 105 by the fixing structure 106 .
  • the fixing structure 106 may use glue, double-sided tape, solder, screws and snaps. That is to say, the piezoelectric ceramic component can be fixed on the lower surface of the circuit board 105 by fixing means such as glue, double-sided tape, welding, screws, and buckles.
  • the welding can include soldering or laser spot welding.
  • the reinforcing plate 108 needs to avoid space for the piezoelectric ceramic component. That is, the reinforcing plate 108 is provided with a window at the installation position of the piezoelectric ceramic component.
  • the piezoelectric ceramic component further includes:
  • the weight block 107 is fixed on the bottom of the piezoelectric ceramic sheet 104 for increasing the vibration strength of the piezoelectric ceramic sheet 104 .
  • the piezoelectric ceramic driving chip on the circuit board 105 generates alternating voltages, and the piezoelectric ceramic sheet 104 bends into an arcuate shape under the action of the inverse piezoelectric effect, and the two ends of the A force opposite to the bending direction is generated, and the magnitude is equal to the reaction force generated by the deformation.
  • the appropriate weight of the counterweight will increase the force between the metal substrate and the circuit board 105, thereby increasing the vibration intensity of the touch panel 101.
  • the configuration block 107 may not be added.
  • the configuration block 107 can be installed at or near the center of gravity of the piezoelectric ceramic sheet 104, and can be fixed with glue or double-sided tape.
  • glue or double-sided tape Generally, a denser copper block, lead block, or steel block can be used.
  • the weight block is fixed at the center of gravity of the piezoelectric ceramic sheet, and the piezoelectric ceramic sheet is uniformly stressed.
  • one end of the piezoelectric ceramic sheet is not subjected to high pressure, resulting in an easy fixing structure. Fall off, on the other hand, the vibration feedback would be better.
  • the weight block 107 can be a rectangular block with a first groove, and the piezoelectric ceramic sheet 104 is arranged in the first groove.
  • the thickness of the touch panel can be further reduced by arranging the piezoelectric ceramic sheet in the groove of the weight block.
  • the counterweight 107 may also adopt other shapes, for example, the shape of the counterweight 107 may be set according to the shape of the piezoelectric ceramic sheet 104 .
  • the first groove may also be set in other shapes, such as a trapezoidal groove, which is not limited in this embodiment of the present application.
  • selecting a weight block of suitable quality is beneficial to enhance the effect of vibration feedback.
  • the length and width of the piezoelectric ceramic sheet 104 are respectively 50 mm and 6 mm, and the mass of the counterweight 107 may be 2.5 g.
  • the length and width of the piezoelectric ceramic sheet 104 have a certain error, such as ⁇ 0.1 mm, that is, the length of the piezoelectric ceramic sheet is between 49 mm and 51 mm, and the width of the piezoelectric ceramic sheet is between 5 mm and 7 mm.
  • the mass of the counterweight block 107 has a certain error, for example, ⁇ 0.1g, that is, the mass range of the counterweight block can be between 2.4g-2.6g.
  • the embodiment of the present application is only described by taking the mass of the weight block 107 as about 2.5 g as an example.
  • a piezoelectric ceramic sheet generally includes a piezoelectric ceramic, a metal substrate, and electrodes. Specifically, it is arranged in order from top to bottom: electrodes, piezoelectric ceramics, metal substrates, piezoelectric ceramics, and electrodes. Among them, the electrodes are flush with the two ends of the piezoelectric ceramic, and the two ends of the metal substrate protrude from the piezoelectric ceramic.
  • the two protruding ends of the metal substrate in the piezoelectric ceramic sheet 104 can be fixed on the lower surface of the circuit board 105 through the fixing structure 106 , so that the piezoelectric ceramic sheet 104 can be suspended on the touch panel 101 below.
  • the installation method can be shown in Figure 11.
  • a groove can also be provided in the middle area of the upper surface of the piezoelectric ceramic sheet 104 to expose the metal substrate, and the fixing structure 106 is arranged in the groove and fixedly connected to the lower surface of the circuit board 105, So that the piezoelectric ceramic sheet 104 is suspended and installed under the touch panel 101 .
  • the thickness of the fixing structure 106 may be about 0.5 mm, and the gap between the fixing structure 106 and the piezoelectric ceramic is at least greater than or equal to 0.1 mm, and preferably, the gap is between 0.1 mm and 0.2 mm.
  • a certain gap is maintained between the fixed structure and the piezoelectric ceramic, so that the fixed structure will not affect the vibration of the piezoelectric ceramic sheet.
  • the fixed structure maintains a certain thickness. On the one hand, the piezoelectric ceramic sheet will not contact the touch panel when it vibrates because it is too thin, and on the other hand, it will not increase the thickness of the touch panel because it is too thick.
  • the embodiment of the present application also provides a single-ended fixing solution without adding a counterweight.
  • FIG. 12 shows another schematic diagram of the stacking of the touch panel 100 provided by the embodiment of the present application. Compared with FIG. 3 , other structures are the same, and the difference is that the touch panel 100 does not include a counterweight.
  • one end of the metal substrate protrudes from the piezoelectric ceramic and the electrode, and the protruding end of the metal substrate in the piezoelectric ceramic sheet 104 and the piezoelectric ceramic can be fixed on the circuit board 105 through a fixing structure 106 .
  • the fixing structure 106 is as close as possible to the tail end of the metal substrate, the length of the fixing structure 106 does not exceed half of the total length of the piezoelectric ceramic sheet 104, and the thickness of the fixing structure is in the range of 0.4mm-0.6mm.
  • the installation method can be shown in Figure 13. One end of the piezoelectric ceramic component is suspended and fixed under the touch panel.
  • the piezoelectric ceramic component receives a vibration command, one end of the piezoelectric ceramic component vibrates up and down according to the driving signal output by the piezoelectric ceramic driving chip.
  • the rigidity of the piezoelectric ceramic is greater than that of the metal substrate.
  • the up and down vibration of one end of the piezoelectric ceramic component is transmitted to the other end of the piezoelectric ceramic component, thereby driving the entire touch panel to vibrate.
  • the piezoelectric ceramic plate has a stronger vibration sense and a better user experience.
  • the number of piezoelectric ceramic sheets can be reduced, and the cost can be reduced.
  • the protruding end of the metal substrate and the piezoelectric ceramic are fixed on the lower surface of the circuit board 105 through a fixing structure 106 at the same time, the service life of the piezoelectric ceramic component is longer, and the piezoelectric ceramic will not be separated from the metal substrate due to long-term vibration of the piezoelectric ceramic. piece.
  • the metal substrate may not protrude from the piezoelectric ceramic and the electrode, and the piezoelectric ceramic in the piezoelectric ceramic sheet 104 may be fixed on the lower surface of the circuit board 105 through a fixing structure 106, so that the The piezoelectric ceramic sheet 104 is suspended below the touch panel 101 .
  • the fixing structure 106 is as close to the end of the piezoelectric ceramic as possible, the length of the fixing structure 106 does not exceed half of the total length of the piezoelectric ceramic sheet 104 , and the thickness of the fixing structure ranges from 0.4 mm to 0.6 mm.
  • the installation method can be shown in Figure 14. In FIG.
  • the two protruding ends of the metal substrate are fixed on the lower surface of the circuit board 105 by the fixing structure 106, and the driving signal output by the piezoelectric ceramic driving chip is applied to the electrodes at both ends, so that the bending deformation of the metal substrate is realized. Vibrate up and down, thereby driving the entire touch panel to vibrate.
  • the lever principle used in the embodiments of the present application since the rigidity of the piezoelectric ceramic is greater than that of the metal substrate, the up and down vibration of one end of the piezoelectric ceramic component is transmitted to the other end of the piezoelectric ceramic component, thereby driving the entire touch panel to vibrate.
  • the piezoelectric ceramic sheet 104 can also be fixed on the lower surface of the circuit board 105 through two fixing structures 106, the two fixing structures 106 are placed as close as possible, and one of the fixing structures is as close as possible to the tail of the piezoelectric ceramic sheet 104. end.
  • One end of the piezoelectric ceramic component is suspended and fixed under the touch panel through two fixing structures, and the touch panel is driven to vibrate through the lever principle, which increases the reliability of the touch panel structure and improves the vibration intensity of the module.
  • the piezoelectric ceramic sheet can be a single-sided single-layer sheet as shown in FIG. 15.
  • the piezoelectric ceramic sheets of the single-sided single-layer sheet are arranged in sequence from top to bottom: electrodes, piezoelectric ceramics, metal base
  • the piezoelectric ceramic sheets of the single-layer double-sided sheet are arranged in order from top to bottom: electrodes, piezoelectric ceramics, metal substrates, piezoelectric ceramics , electrodes, and multi-layer single-sided sheets as shown in Figure 16 can also be used.
  • the piezoelectric ceramic sheets of the multilayer single-sided sheet are arranged from top to bottom as follows: electrodes, piezoelectric ceramics, electrodes, piezoelectric ceramics, electrodes , piezoelectric ceramics, metal substrates, and long-strip piezoelectric ceramic sheets such as multi-layer multi-faceted sheets as shown in Figure 17.
  • the piezoelectric ceramic sheets of the multi-layer multi-faceted sheet are arranged in order from top to bottom: Electrodes, piezoelectric ceramics, electrodes, piezoelectric ceramics, electrodes, piezoelectric ceramics, metal substrates, piezoelectric ceramics, electrodes, piezoelectric ceramics, electrodes, piezoelectric ceramics, electrodes.
  • a piezoelectric ceramic sheet using a single-layer double-sided sheet can achieve better vibration performance while reducing costs.
  • the piezoelectric ceramic sheet can be selected by comprehensively considering various factors such as vibration intensity, cost, and driving voltage, which is beneficial to improve the performance of the touch panel.
  • the piezoelectric ceramic sheet can be selected to have a length of 50mm and a width of 6mm.
  • the aspect ratio of the piezoelectric ceramic sheet is 50:6, as long as it can be applied to a touch panel of a suitable size and/or can meet a certain vibration intensity.
  • a piezoelectric ceramic sheet with a length of 50mm and a width of 6mm is suitable for A touch panel with a length of 150mm and a width of 90mm.
  • the vibration feedback can be enhanced by adjusting the driving voltage without changing the size of the piezoelectric ceramic sheet.
  • the touch panel 100 may include a piezoelectric ceramic sheet 104 .
  • the one piezoelectric ceramic sheet 104 may be arranged at the center of the touch panel 101 .
  • the installation direction of the piezoelectric ceramic sheet 104 may be parallel to the long side or the short side of the touch panel 101 .
  • the installation direction of the piezoelectric ceramic sheet 104 may also be inclined to the long side or the short side of the touch panel 101 .
  • the touch panel 100 of the embodiment of the present application may also include a plurality of piezoelectric ceramic sheets 104, and the plurality of piezoelectric ceramic sheets 104 may vibrate individually or together, thereby increasing the vibration intensity of the touch panel at different positions. consistency.
  • the plurality of piezoelectric ceramic sheets are arranged side by side.
  • the two piezoelectric ceramic sheets 104 in FIG. 20 are arranged side by side parallel to the short side of the touch panel 101
  • the two piezoelectric ceramic sheets 104 in FIG. 21 are arranged side by side parallel to the long side of the touch panel 101 .
  • the four piezoelectric ceramic sheets 104 in FIG. 22 are arranged in parallel to the short sides of the touch panel 101 .
  • a part of the plurality of piezoelectric ceramic sheets 104 is arranged parallel to the long side of the touch panel 101 , and another part of the plurality of piezoelectric ceramic sheets 104 is parallel to the long side of the touch panel 101 .
  • the short sides are set side by side.
  • the plurality of piezoelectric ceramic sheets include four piezoelectric ceramic sheets 104 , which are respectively disposed at the edge positions of the four sides of the touch panel 101 .
  • the settings of the above-mentioned various sizes are illustrative examples, and are not used to limit the embodiments of the present application.
  • the adhesive 131 can be double-sided adhesive; the adhesive 132 can be flexible glue or pad; the adhesive 133 can be instant adhesive, epoxy adhesive or adhesive film; The adhesive 134 can be double-sided tape or glue.
  • FIG. 24 shows a bottom view of the touch panel provided by the embodiment of the present application
  • FIG. 25 shows another bottom view of the touch panel provided by the embodiment of the present application.
  • FIG. 24 is a bottom view of the touch panel 100 shown in FIG. 3 .
  • the pressure sensor 102 is fixed on the side of the touch panel 101 by the elastic bracket 103 , and the projection of the pressure sensor 102 on the touch panel 101 is located in the area of the touch panel 101 outside.
  • the elastic support 103 adopts a U-shaped sheet-like structure, and the U-shaped sheet-like structure includes two short axes and one long axis, and the two short axes are fixed on the In the edge area below the touch panel 101, the pressure sensor 102 is arranged on the short axis, and the long axis extends to the side of the touch panel 101 so that the pressure sensor 102 and the touch panel 101 are located at same plane.
  • the elastic support 103 may also adopt a semicircular sheet-like structure.
  • the embodiment of the present application does not limit the shape of the elastic support 103 .
  • the pressure sensor 102 is located on the short axis of the elastic support near the intersection of the short axis and the long axis.
  • fixing the pressure sensor on the side of the touch panel can make the thickness of the touch panel smaller, for example, the thickness of the touch panel can reach 3 mm.
  • the touchpad may include a plurality of elastic supports 103, for example, two elastic supports 103, the two elastic supports 103 are disposed opposite to each other, and each elastic support is provided on Two pressure sensors 102 .
  • the pressure sensor 102 is attached to the elastic support 103.
  • the elastic support 103 and the pressure sensor 102 deform together, so that the pressure sensor 102 can convert the detected deformation signal into an electrical signal.
  • FIG. 26 shows a structural exploded view of the touch panel according to the embodiment of the present application.
  • the various devices shown in the figures are the same as those described above, and for the sake of brevity, they will not be repeated here.
  • FIG. 27 shows an interaction diagram between the internal structures of the touch panel according to the embodiment of the present application.
  • the capacitance detection array below the touch panel converts the detected capacitance signal into an electrical signal and sends it to the touch detection unit in the control chip
  • the pressure sensor below the touch panel converts the detected deformation signal into an electrical signal and sends it to Control the pressure detection unit in the chip, such as a 4-channel piezoresistive detection unit.
  • the control chip can communicate with the main control board in the electronic device through the communication unit.
  • the control chip can also communicate with the piezoelectric ceramic drive chip through the communication unit when the pressure detection unit determines that the pressure signal is greater than the first threshold, and then the piezoelectric ceramic drive chip drives the piezoelectric ceramic sheet to vibrate together with the touch panel.
  • an embodiment of the present application further provides an electronic device, including the touch panel in the various embodiments described above.
  • branches and units may be implemented in other manners.
  • the branches described above are schematic.
  • the division of the unit is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or integrated into A branch, or some feature can be ignored, or not implemented.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

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Abstract

本申请提供了一种触控板和电子设备，该触控板包括：触摸面板；多个压力传感器，固定于弹性支架上，用于检测所述触摸面板上的压力；压电陶瓷组件，包括压电陶瓷片，所述压电陶瓷片用于向用户提供震动反馈，其中，所述压电陶瓷组件悬空固定于所述触摸面板的下方，以与所述弹性支架隔离。本申请的触控板和电子设备，有利于提高触控板的压力检测精度，且能够检测持续的压力，并且震动反馈效果好，从而提高了用户体验。

Description

触控板和电子设备 技术领域
本申请实施例涉及电子技术领域，尤其涉及一种触控板和电子设备。
背景技术
触控板是一种应用于电子设备的控制屏幕光标的输入装置。触控板通过检测用户手指在面板区域操作时的微小电容变化，得到高分辨率手指坐标等触控信息，以精确控制屏幕光标进行移动、点击。通常触控板背面也配置了单按键，通过检测按键的行为实现了传统的鼠标左键和右键的功能。
为了提升触控板的操作便捷性，压力触控板渐渐成为一种新趋势。压力触控板取消了常规触控板的物理按键，并增加了压力感应和震动反馈功能。
目前压电陶瓷类型的压力触控板存在震感小，用户体验不足以及压力检测精度低且不能检测持续的压力等问题。
发明内容
有鉴于此，本申请提供了一种触控板和电子设备，有利于提高触控板的压力检测精度，且能够检测持续的压力，并且震动反馈效果好，从而提高了用户体验。
第一方面，提供了一种触控板，包括：触摸面板；多个压力传感器，固定于弹性支架上，用于检测所述触摸面板上的压力；压电陶瓷组件，包括压电陶瓷片，所述压电陶瓷片用于向用户提供震动反馈，其中，所述压电陶瓷组件悬空固定于所述触摸面板的下方，以与所述弹性支架隔离。
在保持压电陶瓷片提供震动反馈的条件下，使用压力传感器进行压力检测，不仅能够提高压力检测精度，而且能够检测持续的压力，另外，将压电陶瓷片悬空固定于触摸面板的下方，以与用于支撑压力传感器的弹性支架隔离，不仅使得压电陶瓷片的震动不影响压力传感器的压力检测，而且压电陶瓷片的震感更强，用户体验更好。并且，由于采用了压电陶瓷片作为振动源，结构更轻薄，震感更加清脆且丰富。
在一种可能的实现方式中，所述触控板还包括：
固定结构，用于将所述压电陶瓷组件悬空固定于所述触摸面板的下方。
采用固定结构将压电陶瓷片悬空固定于触摸面板的下方，低成本且安装简单。
在一种可能的实现方式中，所述压电陶瓷片包括压电陶瓷、金属基片以及电极；所述金属基片的两端突出于所述压电陶瓷和所述电极，所述金属基片的两端通过所述固定结构固定于所述触摸面板的下方。
由于金属基片的两端突出于压电陶瓷和电极，将该金属基片的两端通过固定结构固定在触摸面板的下方，可以实现将压电陶瓷组件悬空固定于触摸面板的下方。
在一种可能的实现方式中，所述压电陶瓷组件还包括：配重块，固定于所述压电陶瓷片的底部，用于增加所述压电陶瓷片的震动强度。
配重块可以增大压电陶瓷片与触摸面板下方的电路板或补强板之间的作用力，由此可以增加压电陶瓷片的震动强度，并且震动声音更小。
在一种可能的实现方式中，所述配重块采用具有第一凹槽的矩形块，所述压电陶瓷片设置在所述第一凹槽中。
将压电陶瓷片设置于配重块设置的凹槽中，可以进一步降低触控板的厚度。
在一种可能的实现方式中，所述配重块固定于所述压电陶瓷片的重心位置或者重心附近。
将配重块固定于压电陶瓷片的重心位置或者重心附近，压电陶瓷片的受力均匀，一方面不会导致压电陶瓷片的一端承受压力较大，导致固定结构容易脱落，另一方面，震动反馈效果会更好。
在一种可能的实现方式中，所述配置块为铜块、铅块或钢块。
选择密度较大的配重块，体积小，但配重效果佳。
在一种可能的实现方式中，所述配重块的质量范围为2.4g-2.6g之间。
选择合适质量的配重块，有利于增强震动反馈的效果。
在一种可能的实现方式中，所述固定结构与所述压电陶瓷之间的距离大于或等于0.1mm。
将固定结构与压电陶瓷之间保持一定的间隙，从而使得固定结构不会影响压电陶瓷片的振动。
在一种可能的实现方式中，所述压电陶瓷片包括压电陶瓷、金属基片以及电极；所述金属基片的一端通过所述固定结构固定于所述触摸面板的下方。
在一种可能的实现方式中，所述金属基片的一端突出于所述压电陶瓷和所述电极，所述金属基片的一端和所述压电陶瓷的一端同时通过所述固定结构固定于所述触摸面板的下方。
由于金属基片的一端突出于压电陶瓷和电极，将该金属基片的一端通过固定结构固定在触摸面板的下方，可以实现将压电陶瓷组件悬空固定于触摸面板的下方。
在一种可能的实现方式中，所述固定结构包括胶水、双面胶、螺钉、卡扣或焊锡。
可选地，所述压电陶瓷组件可以通过胶水、双面胶、螺钉、卡扣或者焊接等固定方式固定在触摸面板的下方。其中，焊接可以包括通过焊锡焊接，也可以通过激光点焊。
在一种可能的实现方式中，所述固定结构的厚度范围在0.4mm-0.6mm之间。
固定结构保持一定的厚度，一方面不会因为太薄而使得压电陶瓷片在震动时接触到触摸面板，另一方面不会因为太厚而增加触控板的厚度。
在一种可能的实现方式中，所述压电陶瓷片的长度为49mm-51mm之间，所述压电陶瓷片的宽度为5mm-7mm之间。
在一种可能的实现方式中，所述触控板包括一个压电陶瓷片，所述一个压电陶瓷片布置在所述触控面板的中心位置，所述一个压电陶瓷片的安装方向平行于所述触摸面板的长边或短边。
在一种可能的实现方式中，所述触控板包括多个压电陶瓷片，所述多个压电陶瓷片沿同一方向并排设置，或者，所述多个压电陶瓷片中的一部分平行于所述触摸面板的长边并排设置，所述多个压电陶瓷片中的另一部分平行于所述触摸面板的短边并排设置。
布置多个压电陶瓷片，可以提高震动强度，压电陶瓷片的安装方向可平行或倾斜于触摸面板的任意边，安装方式灵活。将多个压电陶瓷片均匀放置在触摸面板对称位置，可以增加触摸面板不同位置震动强度的一致性。
在一种可能的实现方式中，所述触控板包括4个压力传感器，所述4个压力传感器在所述触摸面板上的投影分别位于所述触摸面板内的4个角的位 置，或者，所述4个压力传感器在所述触摸面板上的投影分别位于所述触摸面板内的4条边的中心位置。
在一种可能的实现方式中，所述压力传感器固定在触摸面板的侧面，所述压力传感器在所述触摸面板上的投影位于所述触摸面板的区域之外。
将压力传感器固定在触摸面板的侧面，可以使得触控板的厚度更小。
在一种可能的实现方式中，所述弹性支架包括2个短轴和1个长轴，所述2个短轴固定于所述触摸面板下方的边缘区域，所述压力传感器设置在所述短轴上。
在一种可能的实现方式中，所述长轴向所述触摸面板的侧面延伸以使得所述压力传感器与所述触摸面板位于同一平面。
在一种可能的实现方式中，所述触控板包括两个所述弹性支架，所述两个弹性支架相对设置，每个所述弹性支架上设置两个压力传感器。
在一种可能的实现方式中，所述弹性支架设置有第二凹槽，所述第二凹槽的2个侧壁的顶部与所述触摸面板的下方固定连接，所述压力传感器固定在所述凹槽结构的底壁。
在一种可能的实现方式中，所述两个侧壁的顶部向外延伸形成台阶，所述台阶的上表面与所述触摸面板的下方固定连接。
弹性支架采用凹槽结构，并且通过向外延伸的台阶面与触摸面板连接，可以增强结构强度。
在一种可能的实现方式中，所述触摸面板下方的叠层设置有第三凹槽，所述第二凹槽的两个侧壁的顶部固定在所述第三凹槽内。
将弹性支架固定在触摸面板下方的叠层设置的凹槽内，有利于降低触控板的厚度。
在一种可能的实现方式中，所述触控板还包括：补强板，与所述电路板两端的下表面固定连接，用于增加所述触摸面板的刚性。
采用补强板增加触摸面板的刚性，可以减小用户按压触摸面板时产生的形变与塌陷。
第二方面，提供了一种电子设备，包括第一方面以及第一方面任一种实现方式中的触控板。
附图说明
图1是一种典型的压力触控板的示意性爆炸图。
图2是本申请实施例的触控板的示意性框图。
图3是本申请实施例的触控板的一种叠层示意图。
图4是本申请实施例的触控板的另一叠层示意图。
图5至图8示出了本申请实施例的触控板中的压力传感器的分布图。
图9是本申请实施例的压电陶瓷片的震动反馈的示意性原理图。
图10是本申请实施例的压电陶瓷片的结构示意图。
图11是本申请实施例的压电陶瓷片的安装示意图。
图12是本申请实施例的触控板的另一叠层示意图。
图13是本申请另一实施例的压电陶瓷片的安装示意图。
图14是本申请另一实施例的压电陶瓷片的安装示意图。
图15至图17是本申请实施例的压电陶瓷片的其他结构示意图。
图18至图19是本申请实施例的压电陶瓷片的安装方向的示意图。
图20至图23是本申请实施例的压电陶瓷片的分布图。
图24和图25是本申请实施例的触控板的底视图。
图26是本申请实施例的触控板的爆炸示意图。
图27是本申请实施例的触控板内部结构的交互图。
具体实施方式
下面将结合附图，对本申请实施例中的技术方案进行描述。
触控板是一种应用于电子设备的控制屏幕光标的输入装置。触控板通过检测用户手指在面板区域操作时的微小电容变化，得到高分辨率手指坐标等触控信息，以精确控制屏幕光标进行移动、点击。通常触控板背面也配置了单按键，通过检测按键的行为实现了传统的鼠标左键和右键的功能。
为了提升触控板的操作便捷性，压力触控板渐渐成为一种新趋势。压力触控板是指取消了常规触控板的物理按键，并增加了压力感应和震动反馈功能。
一种典型的压力触控板采用线性马达触控方案。但线性马达触控方案主要存在以下问题：
1.结构厚度较大。占用电子设备内部电池空间，无法适用于一些轻薄的电子设备；
2.线性马达震感较拖沓，不清脆；
3.马达功耗较大。
而另一种典型的压力触控板则采用压电陶瓷触控方案，由于其轻薄的优势越来越受青睐。本申请实施例就是基于压电陶瓷触控方案实现的。
下面将结合图1描述基于压电陶瓷触控方案实现的一种典型的压力触控板。
图1为该压力触控板的爆炸示意图。图1中从上至下分别是触摸面板，泡棉、压电陶瓷片以及柔性印制电路(Flexible Printed Circuit，FPC)、泡棉、绝缘聚对苯二甲酸乙二醇酯(Polyethylene terephthalate，PET)垫片、钣金支架以及主机上盖。其中，触摸面板可以包括盖板和触摸印制电路板(Printed circuit board，PCB)。而由于压电陶瓷片也可以进行压力检测，因此，泡棉也可以称为传感器(Sensor)泡棉。
具体地，当用户手指按压触摸面板时，触摸面板下的泡棉将压力传递给底下的压电陶瓷片，压电陶瓷片在正压电效应下产生电信号，控制芯片收到该电信号后产生驱动信号，并驱动压电陶瓷片产生震动，震动通过泡棉传递给触摸面板，压电陶瓷片上下两层的泡棉主要用于缓冲压力同时吸收震动声音，FPC用于连接多个压电陶瓷片并传输电信号给控制芯片，钣金支架和C壳起到支撑作用。
由于压电陶瓷片是通过在泡棉之间的膨胀和收缩产生电势差，从而产生电信号进行压力检测，其压力检测的精度较低，且不能检测持续的压力，另外单个压电陶瓷片震感小，用户体验不足，如果要增加震感，则需要安装多个压电陶瓷片，而这多个压电陶瓷片则分别需要单独驱动，成本较高。
有鉴于此，本申请实施例在上述压电陶瓷触控方案的基础上提供了一种触控板，可以解决以上各种问题。
应理解，本申请实施例的技术方案可以应用于各种电子设备。
例如，智能手机、笔记本电脑、平板电脑、游戏设备等便携式或移动计算设备，以及电子数据库、汽车、银行自动柜员机(Automated Teller Machine，ATM)等其他电子设备。但本申请实施例对此并不限定。
图2示出了本申请实施例的触控板100的示意性结构图。如图2所示，该触控板100包括：
触摸面板101；
压力传感器102，用于在所述触摸面板承受压力时，将所述压力传感器的形变转换成第一电信号，所述第一电信号用于压力检测；
弹性支架103，用于支撑所述压力传感器，并且在所述触控板承受压力时，带动所述压力传感器一起发生弹性形变；
包括压电陶瓷片104的压电陶瓷组件，所述压电陶瓷片用于在所述第一电信号大于第一阈值时，向用户提供震动反馈，其中，所述压电陶瓷组件悬空固定于所述触摸面板的下方，以与所述弹性支架隔离。
具体地，在申请实施例中，在触摸面板承受压力之后，将压力传递至底部的弹性支架，支架弯曲会带动其支撑的压力传感器一起发生弹性形变，然后压力传感器将检测到的形变转换成电信号，以用于压力检测；在检测到压力传感器转换的电信号大于第一阈值时，压电陶瓷片带动触摸面板一起震动，将震动反馈给用户。震动反馈可以使得用户确定其按压操作是否有效，从而可以最大限度地减少重复手势。
本申请实施例中的压电陶瓷组件与弹性支架隔离，是指压电陶瓷组件在弹性支架从非形变到形变的过程中均不与弹性支架接触；而压电陶瓷组件采用悬空的方式固定于触摸面板的下方是指压电陶瓷组件的底部没有支撑，并且压电陶瓷组件与触摸面板之间具有间隙。
需要说明的是，第一阈值是一个指定阈值，可以是通过经验得到的，该第一阈值可以是指用户能够感知到震动的按压力度的临界值，第一阈值大于0。
可选地，电子设备可以存储多个按压力的临界值，用户可以根据使用习惯从中选择一个。例如，电子设备存储轻度按压的临界值、中度按压的临界值以及重度按压的临界值，用户可以根据自己习惯的按压力度从中选择一个临界值。
因此，本申请实施例的触控板，由于采用了压电陶瓷片作为振动源，结构更轻薄，震感更加清脆且丰富。并且在保持压电陶瓷片提供震动反馈的条件下，使用压力传感器进行压力检测，不仅能够提高压力检测精度，而且能够检测持续的压力，另外，将压电陶瓷组件悬空固定于触摸面板的下方，以与用于支撑压力传感器的弹性支架隔离，不仅使得压电陶瓷片的震动不影响压力传感器的压力检测，而且压电陶瓷片的震感更强，用户体验更好，从而在同等震感的情况下，减少压电陶瓷片的数量，降低成本。
图3示出了本申请实施例提供的触控板100的一种叠层示意图。
如图3所示，可选地，在本申请实施例中，所述触控板100包括：
电路板105，与所述触摸面板的下表面固定连接，用于处理所述第一电信号，并在所述第一电信号大于所述第一阈值时，控制所述压电陶瓷片向所述用户提供震动反馈。
如图3所示，电路板105可以贴合在触摸面板101的下表面，例如，电路板105通过贴合胶131与触摸面板101的下表面固定连接。该电路板105可以搭载电子元器件和电路，可以用来处理压力、震动等电信号，实现系统设定功能。
可选地，电路板105可以包括压力检测芯片、压电陶瓷芯片及外围电路，连接器等主要元器件。
具体地，压力检测芯片可以判断压力传感器采集到的第一电信号是否达到第一阈值，如果达到第一阈值，则向压电陶瓷驱动芯片发出震动命令，压电陶瓷驱动芯片接收到震动命令后，驱动压电陶瓷片按照设定模式进行震动，压电陶瓷片带动触摸面板一起震动，将震感反馈给用户。
可选地，在本申请实施例中，所处触控板100还包括：
电容检测阵列，用于将手指触摸得到的电容信号转换为第二电信号，所述第二电信号用于触摸检测。
可选地，该电路板105也可以用于处理所述第二电信号。
也就是说，该电路板105还可以包括触摸检测芯片，而触摸检测芯片和压力检测芯片可以统称为控制芯片。
可选地，电路板105的表面可以具有铜皮组成的电容检测阵列，手指触摸时，电容检测阵列将电容信号转换为电信号，传递给触摸检测芯片。
在本申请实施例中，将触摸检测芯片和压力检测芯片合二为一，也就是说，采用单个芯片既可以进行压力检测，又可以进行触摸检测，降低了电源功耗，简化了电路结构，节约了系统成本，而且可以提供更快的系统响应。
图4示出了本申请实施例提供的触控板100的另一叠层示意图。与图3相比，图4中的触控板100还包括：
补强板108，与所述电路板105两端的下表面固定连接，用于增加所述触摸面板101的刚性。
具体地，补强板108和电路板105可以通过贴合胶134贴合，弹性支架 103通过贴合胶132与补强板108的下表面贴合。
可选地，补强板采用铝板或者钢板。
采用补强板增加触摸面板101的刚性，可以减小用户按压触摸面板时产生的形变和塌陷。
如图3和图4所示，所述弹性支架103固定在触摸面板101的下方。
具体地，如图3所示，所述弹性支架103与所述电路板105的下表面固定连接。如图4所示，所述弹性支架103与所述补强板108的下表面固定连接。
可选地，所述弹性支架103设置有第二凹槽，所述第二凹槽的两个侧壁的顶部与所述触摸面板101的下方固定连接，所述压力传感器102固定在所述第二凹槽的底壁。
在一个实施例中，所述两个侧壁的顶部向外延伸形成台阶，所述台阶的上表面与所述触摸面板101的下方固定连接，所述压力传感器102固定在所述第二凹槽的底壁，例如，所述台阶的上表面与所述电路板105的下表面固定连接，或者所述台阶的上表面与所述补强板108的下表面固定连接。
具体地，台阶的上表面可以通过贴合胶132与电路板105或补强板108的下表面固定连接。而压力传感器102可以通过贴合胶133与弹性支架的第二凹槽的底壁固定连接。
在另一个实施例中，所述触摸面板101下方的叠层设置有第三凹槽，所述第二凹槽的两个侧壁的顶部固定在所述第三凹槽内。例如，所述补强板108的下表面设置有第三凹槽，所述两个侧壁的顶部固定在所述第三凹槽内。
通过将弹性支架固定在触摸面板下方的叠层设置的凹槽内，有利于降低触控板的厚度。
在另一个实施例中，所述弹性支架的两个侧壁也可以采用斜面。
应理解，本申请实施例对弹性支架的具体形状不作限定，只要能够支撑压力传感器，并且当触摸面板上承受压力时，能够实现与压力传感器一起变形即可。
可选地，在本申请实施例中，弹性支架103的数量可以是一个，也可以是多个。一个弹性支架103的底壁可以放置一个压力传感器102，也可以放置多个压力传感器102。如果弹性支架103的数量是多个，该多个弹性支架103可以独立为多个部件，也可以连接成一个整体，固定在电路板105的四 条边的边缘区域。
压力传感器102贴合在弹性支架103上，当弹性支架103弯曲变形时，压力传感器102跟随弹性支架103一起发生变形。
可选地，所述触控板100包括多个压力传感器102，所述多个压力传感器102在所述触摸面板101上的投影位于可以位于所述触摸面板101的至少一个角的位置和/或所述触摸面板101的至少一条边的中心位置。
采用多个压力传感器，可以将按压力进行分散，从而可以增大触控板的结构稳定性。
在一个实施例中，如图5所示，所述多个压力传感器为4个压力传感器102，所述4个压力传感器102在所述触摸面板101上的投影分别位于所述触摸面板101内的4个角的位置。
在一个实施例中，如图6所示，所述多个压力传感器为4个压力传感器102，所述4个压力传感器102在所述触摸面板101上的投影分别位于所述触摸面板101的四条边的中心位置。
在另一个实施例中，如图7所示，所述多个压力传感器为6个压力传感器102，所述6个压力传感器102在所述触摸面板101上的投影分别位于所述触摸面板101的四个角的位置以及所述触摸面板101的两条长边的中心位置。
在其他实施例中，如图8所示，所述多个压力传感器为8个压力传感器102，所述8个压力传感器102在所述触摸面板101上的投影分别位于所述触摸面板101的四个角的位置以及所述触摸面板101的四条边的中心位置。
将压力传感器分布在触摸面板的四个角以及四条边的中心位置，可以提高压力检测的均匀性。
可选地，所述触摸面板101可以用于用户触摸和按压，也可以作为外观装饰，一般采用玻璃或聚酯薄膜(mylar)。
可选地，所述压力传感器102可以采用压阻型压力传感器。
可选地，所述弹性支架103可以采用钢片或者铝片。
继续参见图3和图4，所述触控板100还包括：
固定结构106，用于将所述压电陶瓷组件悬空固定于所述触摸面板101的下方。
具体地，压电陶瓷组件通过固定结构106固定在电路板105的下表面。 可选地，该固定结构106可以采用胶水、双面胶、焊锡、螺钉以及卡扣。也就是说，压电陶瓷组件可以通过胶水、双面胶、焊接、螺钉以及卡扣等固定方式固定在电路板105的下表面，其中，焊接可以包括通过焊锡焊接，也可以通过激光点焊。
可选地，如图4所示，补强板108需要为压电陶瓷组件避让空间。即补强板108在压电陶瓷组件的安装位置设置有开窗。
继续参见图3和图4在本申请实施例中，所述压电陶瓷组件还包括：
配重块107，固定于所述压电陶瓷片104的底部，用于增加所述压电陶瓷片104的震动强度。
具体地，如图9所示，电路板105上的压电陶瓷驱动芯片产生交变的电压，压电陶瓷片104在逆压电效应的作用下，金属基片弯曲成弓形，两端就会产生与弯曲方向相反的作用力，大小等于形变产生的反作用力，适当重量的配重块会使金属基片与电路板105之间的作用力增大，由此增加触摸面板101的震动强度，根据实际需求，也可以不加配置块107。
可选地，配置块107可以安装在压电陶瓷片104的重心或者重心附近位置，可以用胶水或者双面胶固定，一般可以采用密度较大的铜块、铅块或者钢块等。
在本申请实施例中，将配重块固定于压电陶瓷片的重心位置，压电陶瓷片的受力均匀，一方面不会导致压电陶瓷片的一端承受压力较大，导致固定结构容易脱落，另一方面，震动反馈效果会更好。
另外，选择密度较大的配重块，体积小，但配重效果佳。
在一种实施例中，配重块107可以采用具有第一凹槽的矩形块，所述压电陶瓷片104设置在所述第一凹槽中。
将压电陶瓷片设置于配重块的凹槽中，可以进一步降低触控板的厚度。
可选地，配重块107也可以采用其他形状，例如配重块107的形状可以按照压电陶瓷片104的形状设定。第一凹槽也可以设置为其他形状，例如梯形凹槽等，本申请实施例对此不作限定。
可选地，在本申请实施例中，选择合适质量的配重块，有利于增强震动反馈的效果。优选的，压电陶瓷片104的长宽分别为50mm和6mm，所述配重块107的质量可以为2.5g。
压电陶瓷片104的长宽具有一定的误差，例如±0.1mm，即所述压电陶 瓷片的长度为49mm-51mm之间，所述压电陶瓷片的宽度为5mm-7mm之间。
配重块107的质量具有一定的误差，例如±0.1g，即配重块的质量范围可以在2.4g-2.6g之间。
而本申请实施例仅以配重块107的质量为约2.5g为例进行描述。
如图10所示，压电陶瓷片一般包括压电陶瓷、金属基片以及电极。具体地，从上到下依次布置为：电极、压电陶瓷、金属基片、压电陶瓷以及电极。其中，电极与压电陶瓷两端齐平，而金属基片的两端突出于压电陶瓷。
可选地，可以将压电陶瓷片104中的金属基片突出的两端通过固定结构106固定在电路板105的下表面，以使得所述压电陶瓷片104悬空安装于所述触摸面板101的下方。其安装方式可以如图11所示。
可替代地，还可以在压电陶瓷片104的上表面的中间区域设置凹槽，以露出金属基片，将固定结构106设置于该凹槽中，并与电路板105的下表面固定连接，以使得所述压电陶瓷片104悬空安装于所述触摸面板101的下方。
可选地，固定结构106的厚度可以为约0.5mm，固定结构106与压电陶瓷之间的间隙至少大于或等于0.1mm，优选的，间隙为0.1mm～0.2mm之间。将固定结构与压电陶瓷之间保持一定的间隙，从而使得固定结构不会影响压电陶瓷片的振动。另外，固定结构保持一定的厚度，一方面不会因为太薄而使得压电陶瓷片在震动时接触到触摸面板，另一方面不会因为太厚而增加触控板的厚度。
本申请实施例还提供了一种不加配重块的单端固定方案。
图12示出了本申请实施例提供的触控板100的另一叠层示意图。与图3相比，其它结构相同，不同的是，触摸板100不包括配重块。
具体的，金属基片的一端突出于所述压电陶瓷和所述电极，可以将压电陶瓷片104中的金属基片突出的一端和压电陶瓷通过一固定结构106固定在电路板105的下表面，以使得所述压电陶瓷片104悬空安装于所述触摸面板101的下方。该固定结构106尽量靠近金属基片的尾端，所述固定结构106的长度不超过压电陶瓷片104总长度的一半，所述固定结构的厚度范围在0.4mm-0.6mm之间。其安装方式可以如图13所示。将压电陶瓷组件的一端悬空固定于触摸面板的下方，通过杠杆原理，压电陶瓷组件收到震动命令时，压电陶瓷组件的一端根据压电陶瓷驱动芯片输出的驱动信号进行上下震动，由于压电陶瓷的刚性大于金属基片的刚性，压电陶瓷组件的一端的上下震动 传输到压电陶瓷组件的另一端，从而带动整个触摸面板震动，压电陶瓷片的震感更强，用户体验更好，从而在同等震感的情况下，减少压电陶瓷片的数量，降低成本。由于金属基片突出的一端和压电陶瓷同时通过一固定结构106固定在电路板105的下表面，使得压电陶瓷组件的使用寿命更长，不会因为压电陶瓷长时间震动而脱离金属基片。
可选地，金属基片也可以不突出于所述压电陶瓷和所述电极，可以将压电陶瓷片104中的压电陶瓷通过一固定结构106固定在电路板105的下表面，以使得所述压电陶瓷片104悬空安装于所述触摸面板101的下方。该固定结构106尽量靠近压电陶瓷的尾端，所述固定结构106的长度不超过不超过压电陶瓷片104总长度的一半，所述固定结构的厚度范围在0.4mm-0.6mm之间。其安装方式可以如图14所示。在图11中，金属基片突出的两端通过固定结构106固定在电路板105的下表面，根据压电陶瓷驱动芯片输出的驱动信号施加在两端电极上，使得金属基片的弯曲变形实现上下震动，从而带动整个触摸面板震动。本申请实施例利用的杠杆原理，由于压电陶瓷的刚性大于金属基片的刚性，压电陶瓷组件的一端的上下震动传输到压电陶瓷组件的另一端，从而带动整个触摸面板震动。
可选地，可以将压电陶瓷片104还可以通过两个固定结构106固定在电路板105的下表面，两个固定结构106尽量靠近放置，其中一固定结构尽量靠近压电陶瓷片104的尾端。将压电陶瓷组件的一端通过两个固定结构悬空固定于触摸面板的下方，通过杠杆原理，带动触摸面板震动，增加了触摸板结构的可靠性，同时提升模组的震动强度。
可选地，压电陶瓷片可以采用如图15所示的单面单层片，例如该单面单层片的压电陶瓷片从上到下依次布置为：电极、压电陶瓷、金属基片，也可以采用如图10所示的单层双面片，例如该单层双面片的压电陶瓷片从上到下依次布置为：电极、压电陶瓷、金属基片、压电陶瓷、电极，也可以采用如图16所示的多层单面片，例如多层单面片的压电陶瓷片从上到下依次布置为：电极、压电陶瓷、电极、压电陶瓷、电极、压电陶瓷、金属基片、以及也可以采用如图17所示的多层多面片等长条形压电陶瓷片，例如多层多面片的压电陶瓷片从上到下依次布置为：电极、压电陶瓷、电极、压电陶瓷、电极、压电陶瓷、金属基片、压电陶瓷、电极、压电陶瓷、电极、压电陶瓷、电极。较佳的，采用单层双面片的压电陶瓷片能够达到较好震动性能的同时 降低成本。
本申请实施例可以综合考虑震动强度、成本以及驱动电压等多方面因素来选择压电陶瓷片，有利于提高触控板的性能。
可选地，可以选择压电陶瓷片的长为50mm，宽为6mm。或者选择压电陶瓷片的长宽比例为50:6，只要其能够适用于合适尺寸的触摸面板和/或能够满足一定的震动强度即可，例如，长50mm，宽6mm的压电陶瓷片适用于长150mm，宽90mm的触摸面板。或者，也可以不改变压电陶瓷片的尺寸，而是通过调节驱动电压来增强震动反馈。
可选地，在本申请实施例中，所述触控板100可以包括一个压电陶瓷片104。可选地，所述一个压电陶瓷片104可以布置在所述触控面板101的中心位置。
例如，如图18所示，压电陶瓷片104的安装方向可以平行于所述触摸面板101的长边或短边。
再例如，如图19所示，压电陶瓷片104的安装方向也可以倾斜于所述触摸面板101的长边或短边。
可选地，本申请实施例的触控板100也可以包括多个压电陶瓷片104，该多个压电陶瓷片104可以单独震动或者一起震动，由此可以增加触摸面板不同位置震动强度的一致性。
可选地，如图20-22所示，所述多个压电陶瓷片并排设置。其中，图20中的两个压电陶瓷片104平行于触摸面板101的短边并排设置，图21中的两个压电陶瓷片104平行于触摸面板101的长边并排设置。图22中的四个压电陶瓷片104平行于触摸面板101的短边并排设置。
可选地，所述多个压电陶瓷片104中的一部分平行于所述触摸面板101的长边并排设置，所述多个压电陶瓷片104中的另一部分平行于所述触摸面板101的短边并排设置。如图23所示，所述多个压电陶瓷片包括4个压电陶瓷片104，分别设置在所述触摸面板101的四条边的边缘位置。
可选地，在本申请实施例中，上述各种尺寸的设置均为示意性举例，并不用于对本申请实施例作出限制。
可选地，在本申请实施例中，贴合胶131可以采用双面胶；贴合胶132可以采用柔性胶水或胶垫；贴合胶133可以采用瞬干胶，环氧胶或者胶膜；贴合胶134可以采用双面胶或者胶水。
图24示出了本申请实施例提供的触控板的底视图，图25示出了本申请实施例提供的触控板的另一底视图。
图24为图3所示的触控板100的底视图。图25与图24相比，通过所述弹性支架103将压力传感器102固定在触摸面板101的侧面，并且所述压力传感器102在所述触摸面板101上的投影位于所述触摸面板101的区域之外。
在一个实施例中，如图26所示，所述弹性支架103采用U型片状结构，所述U型片状结构包括2个短轴和1个长轴，所述2个短轴固定于所述触摸面板101下方的边缘区域，所述压力传感器102设置在所述短轴上，所述长轴向所述触摸面板101的侧面延伸以使得所述压力传感器102与所述触摸面板101位于同一平面。
可选地，所述弹性支架103也可以采用半圆形片状结构。
总之，本申请实施例对弹性支架103的形状不作限定。
进一步地，所述压力传感器102位于所述弹性支架的短轴上靠近短轴与长轴交接处的位置。
在另一实施例中，与图25不同的是，弹性支架103与触摸面板101之间具有一定夹角。换句话说，压力传感器102在触摸面板101上的投影位于触摸面板101的区域之外但压力传感器102与触摸面板101不在一个平面上。
在本申请实施例中，将压力传感器固定在触摸面板的侧面，可以使得触控板的厚度更小，例如，触控面板的厚度可以达到3mm。
可选地，在本申请实施例中，所述触控板可以包括多个弹性支架103，例如包括两个弹性支架103，所述两个弹性支架103相对设置，所述每个弹性支架上设置两个压力传感器102。
将所述压力传感器102贴合在弹性支架103上，当触摸面板101承受压力时，弹性支架103与压力传感器102一起发生形变，从而压力传感器102可以将检测到的形变信号转换为电信号。
图26示出了本申请实施例的触控板的一种结构爆炸图。图中所示的各个器件同上文描述的一致，为了简洁，此处不再赘述。
图27示出了本申请实施例的触控板内部结构之间的交互图。如图27所示，触摸面板下方的电容检测阵列将检测到电容信号转换成电信号发送给控制芯片中的触摸检测单元，触摸面板下方的压力传感器将检测到的形变信号转换成电信号发送给控制芯片中的压力检测单元，例如4通道压阻检测单元。 控制芯片可以通过通讯单元与电子设备中的主控板进行通讯。控制芯片还可以在压力检测单元判断压力信号大于第一阈值时，通过通讯单元与压电陶瓷驱动芯片进行通讯，进而压电陶瓷驱动芯片驱动压电陶瓷片与触摸面板一起震动。
可选地，本申请实施例还提供了一种电子设备，包括上文描述的各种实施例中的触控板。
应理解，说明书通篇中提到的“一个实施例”或“一实施例”意味着与实施例有关的特定特征、结构或特性包括在本申请的至少一个实施例中。因此，在整个说明书各处出现的“在一个实施例中”或“在一实施例中”未必一定指相同的实施例。此外，这些特定的特征、结构或特性可以任意适合的方式结合在一个或多个实施例中。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及电路，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
在本申请所提供的几个实施例中，应该理解到，所揭露的电路、支路和单元，可以通过其它的方式实现。例如，以上所描述的支路是示意性的，例如，该单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到一个支路，或一些特征可以忽略，或不执行。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，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)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限 于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以该权利要求的保护范围为准。

Claims (26)

  1. 一种触控板，其特征在于，包括：
    触摸面板；
    多个压力传感器，固定于弹性支架上，用于检测所述触摸面板上的压力；
    压电陶瓷组件，包括压电陶瓷片，所述压电陶瓷片用于向用户提供震动反馈，其中，所述压电陶瓷组件悬空固定于所述触摸面板的下方，以与所述弹性支架隔离。
  2. 根据权利要求1所述的触控板，其特征在于，所述触控板还包括：
    固定结构，用于将所述压电陶瓷组件悬空固定于所述触摸面板的下方。
  3. 根据权利要求2所述的触控板，其特征在于，所述压电陶瓷片包括压电陶瓷、金属基片以及电极；
    所述金属基片的两端突出于所述压电陶瓷和所述电极，所述金属基片的两端通过所述固定结构固定于所述触摸面板的下方。
  4. 根据权利要求1-3中任意一项所述的触控板，其特征在于，所述压电陶瓷组件还包括：
    配重块，固定于所述压电陶瓷片的底部，用于增加所述压电陶瓷片的震动强度。
  5. 根据权利要求4所述的触控板，其特征在于，所述配重块采用具有第一凹槽的矩形块，所述压电陶瓷片设置在所述第一凹槽中。
  6. 根据权利要求4或5所述的触控板，其特征在于，所述配重块固定于所述压电陶瓷片的重心位置或者重心附近。
  7. 根据权利要求4-6中任意一项所述的触控板，其特征在于，所述配置块为铜块、铅块或钢块。
  8. 根据权利要求4-7中任意一项所述的触控板，其特征在于，所述配重块的质量范围在2.4g-2.6g之间。
  9. 根据权利要求2-8中任意一项所述的触控板，其特征在于，所述固定结构与所述压电陶瓷之间的距离大于或等于0.1mm。
  10. 根据权利要求2所述的触控板，其特征在于，所述压电陶瓷片包括压电陶瓷、金属基片以及电极；
    所述压电陶瓷的一端通过所述固定结构固定于所述触摸面板的下方。
  11. 根据权利要求10所述的触控板，其特征在于，所述金属基片的一端突出于所述压电陶瓷和所述电极，所述金属基片的一端和所述压电陶瓷的一端同时通过所述固定结构固定于所述触摸面板的下方。
  12. 根据权利要求2-11中任意一项所述的触控板，其特征在于，所述固定结构包括胶水、双面胶、螺钉、卡扣或焊锡。
  13. 根据权利要求2-12中任意一项所述的触控板，其特征在于，所述固定结构的厚度范围在0.4mm-0.6mm之间。
  14. 根据权利要求1-13中任意一项所述的触控板，其特征在于，所述压电陶瓷片的长度为49mm-51mm之间，所述压电陶瓷片的宽度为5mm-7mm之间。
  15. 根据权利要求1-14中任意一项所述的触控板，其特征在于，所述触控板包括一个压电陶瓷片，所述一个压电陶瓷片布置在所述触控面板的中心位置，所述一个压电陶瓷片的安装方向平行于所述触摸面板的长边或短边。
  16. 根据权利要求1-15中任意一项所述的触控板，其特征在于，所述触控板包括多个压电陶瓷片，所述多个压电陶瓷片沿同一方向并排设置，或者，所述多个压电陶瓷片中的一部分平行于所述触摸面板的长边并排设置，所述多个压电陶瓷片中的另一部分平行于所述触摸面板的短边并排设置。
  17. 根据权利要求1-16中任意一项所述的触控板，其特征在于，所述触控板包括4个压力传感器，所述4个压力传感器在所述触摸面板上的投影分别位于所述触摸面板内的4个角的位置，或者，所述4个压力传感器在所述触摸面板上的投影分别位于所述触摸面板内的4条边的中心位置。
  18. 根据权利要求1-17中任意一项所述的触控板，其特征在于，所述压力传感器固定在触摸面板的侧面，所述压力传感器在所述触摸面板上的投影位于所述触摸面板的区域之外。
  19. 根据权利要求18所述的触控板，其特征在于，所述弹性支架包括2个短轴和1个长轴，所述2个短轴固定于所述触摸面板下方的边缘区域，所述压力传感器设置在所述短轴上。
  20. 根据权利要求19所述的触控板，其特征在于，所述长轴向所述触摸面板的侧面延伸以使得所述压力传感器与所述触摸面板位于同一平面。
  21. 根据权利要求19或20所述的触控板，其特征在于，所述触控板包括两个所述弹性支架，所述两个弹性支架相对设置，每个所述弹性支架上设 置两个压力传感器。
  22. 根据权利要求1-21中任意一项所述的触控板，其特征在于，所述弹性支架设置有第二凹槽，所述第二凹槽的2个侧壁的顶部与所述触摸面板的下方固定连接，所述压力传感器固定在所述凹槽结构的底壁。
  23. 根据权利要求22所述的触控板，其特征在于，所述两个侧壁的顶部向外延伸形成台阶，所述台阶的上表面与所述触摸面板的下方固定连接。
  24. 根据权利要求23所述的触控板，其特征在于，所述触摸面板下方的叠层设置有第三凹槽，所述第二凹槽的两个侧壁的顶部固定在所述第三凹槽内。
  25. 根据权利要求1-24中任意一项所述的触控板，其特征在于，所述触控板还包括：补强板，与所述电路板两端的下表面固定连接，用于增加所述触摸面板的刚性。
  26. 一种电子设备，包括如权利要求1至25中任一项所述的触控板。
PCT/CN2021/076103 2021-01-05 2021-02-08 触控板和电子设备 WO2022147887A1 (zh)

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