WO2022174453A1 - 虚拟按键的触觉反馈方法、装置及电子设备 - Google Patents

虚拟按键的触觉反馈方法、装置及电子设备 Download PDF

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Publication number
WO2022174453A1
WO2022174453A1 PCT/CN2021/077287 CN2021077287W WO2022174453A1 WO 2022174453 A1 WO2022174453 A1 WO 2022174453A1 CN 2021077287 W CN2021077287 W CN 2021077287W WO 2022174453 A1 WO2022174453 A1 WO 2022174453A1
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Prior art keywords
area
target
touch
key
display panel
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PCT/CN2021/077287
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English (en)
French (fr)
Inventor
陈右儒
花慧
刘晓彤
陶永春
黄继景
Original Assignee
京东方科技集团股份有限公司
北京京东方技术开发有限公司
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Application filed by 京东方科技集团股份有限公司, 北京京东方技术开发有限公司 filed Critical 京东方科技集团股份有限公司
Priority to PCT/CN2021/077287 priority Critical patent/WO2022174453A1/zh
Priority to US17/615,395 priority patent/US11789537B2/en
Priority to CN202180000253.7A priority patent/CN115244490A/zh
Publication of WO2022174453A1 publication Critical patent/WO2022174453A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/016—Input arrangements with force or tactile feedback as computer generated output to the user
    • 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
    • G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
    • 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
    • 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
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
    • G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
    • G06F3/04886—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures by partitioning the display area of the touch-screen or the surface of the digitising tablet into independently controllable areas, e.g. virtual keyboards or menus

Definitions

  • the present application relates to the field of piezoelectric technology, and in particular, to a tactile feedback method, device and electronic device for virtual keys.
  • the current electronic equipment is usually equipped with a touch display panel. Based on the touch display panel, the human-computer interaction function with the user can be provided. Due to the existence of the touch display panel, the physical buttons have gradually been virtualized. button instead.
  • a tactile feedback method for virtual keys is provided, applied to an electronic device, the electronic device includes a touch display panel and at least one piezoelectric element, and the method includes:
  • the target virtual key is any one of the virtual keys
  • the target area includes a key inner area, a key boundary area, and a key outer area
  • the target driving signal generated when the touch position is located in the key boundary area is different from the touch position located inside the key.
  • the target driving signal generated when the touch position is within the area is different from the target driving signal generated when the touch position is within the outer area of the key.
  • the step of determining the target waveform parameters according to the positional relationship between the touch position and each area in the target area corresponding to the target virtual key includes:
  • the first drive signal generated by the first waveform parameter, the second drive signal generated by the second waveform parameter, and the third drive signal generated by the third waveform parameter are all different.
  • the key boundary area includes at least two boundary sub-areas
  • the target driving signal generated when the touch position is located in the first border sub-region is the same as the touch position in the second border
  • the target drive signals generated are different when the sub-regions are located.
  • the step of generating a target drive signal according to the target waveform parameter, and sending the target drive signal to the piezoelectric element, so that the piezoelectric element drives the touch display panel to vibrate also include:
  • the touch display panel includes a touch area and an edge area surrounding the touch area, the piezoelectric element is located in the edge area, and the piezoelectric element is connected to the edge area provided in the edge area.
  • the touch traces do not touch.
  • a tactile feedback device for virtual keys is provided, which is applied to an electronic device, the electronic device includes a touch display panel and at least one piezoelectric element, and the device includes a processor and a waveform generator;
  • the processor is configured to control the touch display panel to display at least one virtual key; acquire the touch position detected by the touch display panel; and according to the touch position and the target corresponding to the target virtual key The positional relationship between the regions in the region determines the target waveform parameter; the target virtual key is any one of the virtual keys;
  • the waveform generator is configured to generate a target drive signal according to the target waveform parameter, and send the target drive signal to the piezoelectric element, so that the piezoelectric element drives the touch display panel to vibrate ;
  • the target area includes a key inner area, a key boundary area, and a key outer area
  • the target driving signal generated when the touch position is located in the key boundary area is different from the touch position located inside the key.
  • the target driving signal generated when the touch position is within the area is different from the target driving signal generated when the touch position is within the outer area of the key.
  • the processor is specifically configured to: when the touch position is located in the inner area of the button, search for the inner area of the button according to the mapping relationship between each area in the target area and the waveform parameters The corresponding first waveform parameter; when the touch position is located in the button boundary area, search for the second waveform parameter corresponding to the button boundary area according to the mapping relationship between each area in the target area and the waveform parameters ; When the touch position is located in the outer area of the button, according to the mapping relationship between each area in the target area and the waveform parameter, find the third waveform parameter corresponding to the outer area of the button;
  • the first drive signal generated by the first waveform parameter, the second drive signal generated by the second waveform parameter, and the third drive signal generated by the third waveform parameter are all different.
  • the key boundary area includes at least two boundary sub-areas
  • the target driving signal generated when the touch position is located in the first border sub-region is the same as the touch position in the second border
  • the target drive signals generated are different when the sub-regions are located.
  • the waveform generator is further configured to stop sending the target drive signal to the piezoelectric element when the touch position is touched for a duration exceeding a preset duration.
  • the touch display panel includes a touch area and an edge area surrounding the touch area, the piezoelectric element is located in the edge area, and the piezoelectric element is connected to the edge area provided in the edge area.
  • the touch traces do not touch.
  • an electronic device including: a touch display panel, at least one piezoelectric element, and the aforementioned tactile feedback device for virtual keys;
  • the tactile feedback devices of the virtual keys are respectively connected with the touch display panel and the piezoelectric element.
  • the touch position detected by the touch display panel is acquired, and the difference between the touch position and each area in the target area corresponding to the target virtual key is obtained.
  • the positional relationship of the device is determined, the target waveform parameters are determined, the target drive signal is generated according to the target waveform parameters, and the target drive signal is sent to the piezoelectric element, so that the piezoelectric element drives the touch display panel to vibrate;
  • the target area includes the inner area of the button, Button boundary area and button outer area, the target drive signal generated when the touch position is within the button boundary area, and the target drive signal generated when the touch position is within the button inner area and when the touch position is within the button outer area
  • the generated target drive signals are different.
  • FIG. 1 schematically shows a flowchart of a haptic feedback method for virtual keys according to an embodiment of the present application
  • FIG. 2 schematically shows a schematic diagram of a virtual keyboard displayed by a touch display panel in an embodiment of the present application
  • FIG. 3 schematically shows a schematic diagram of the division of a target area corresponding to a first target virtual key according to an embodiment of the present application
  • FIG. 4 schematically shows a schematic diagram of the division of a target area corresponding to a second target virtual key according to an embodiment of the present application
  • FIG. 5 schematically shows a schematic diagram of the division of a target area corresponding to a third target virtual key according to an embodiment of the present application
  • FIG. 6 schematically shows a schematic diagram of the division of a target area corresponding to a fourth target virtual key according to an embodiment of the present application
  • FIG. 7 schematically shows a flowchart of another tactile feedback method for virtual keys according to an embodiment of the present application.
  • FIG. 8 schematically shows a schematic structural diagram of a haptic feedback device for virtual keys according to an embodiment of the present application
  • FIG. 9 schematically shows a schematic structural diagram of an electronic device according to an embodiment of the present application.
  • FIG. 1 a flowchart of a tactile feedback method for virtual keys according to an embodiment of the present application is shown, which is applied to an electronic device, where the electronic device includes a touch display panel and at least one piezoelectric element, and may specifically include the following steps:
  • Step 101 Control the touch display panel to display at least one virtual key.
  • the electronic device includes a touch display panel
  • the touch display panel may be an external touch display panel or an in-cell touch display panel.
  • the touch display panel includes a display panel and a touch panel disposed on the light-emitting side of the display panel.
  • the touch electrodes can be embedded inside the display panel.
  • the display panel may be an LCD (Liquid Crystal Display, liquid crystal display) display panel, or an OLED (Organic Light-Emitting Diode, organic light-emitting diode) display panel.
  • the touch display panel is connected to a driver chip.
  • the driver chip includes a gate driver chip and a source driver chip.
  • the gate driver chip sends the corresponding gate signal to the touch display panel
  • the source driver chip sends the touch panel to the touch panel.
  • the display panel sends a corresponding data signal to control the touch display panel to display a target image, where the target image is an image including at least one virtual key.
  • the target screen displayed on the touch display panel includes a virtual keyboard 20
  • the virtual keyboard 20 includes a plurality of virtual keys 21 .
  • the driver chip can be integrated into the processor, that is, the processor includes the driver chip.
  • the touch display panel is connected to the processor; of course, the driver chip and the processor can also be set separately.
  • the control display panel is connected with the driver chip.
  • Step 102 Acquire a touch position detected by the touch display panel.
  • the touch display panel includes a touch area and an edge area surrounding the touch area, a plurality of touch electrodes are arranged in the touch area, and touch electrodes connected to the touch electrodes are arranged in the edge area
  • the touch trace is also connected to the processor.
  • the voltage value of the touch capacitor corresponding to the touch electrode at the touch position will change, and the touch traces correspond to the touch electrode at each position.
  • the voltage value of the device is sent to the processor, and the processor determines the user's touch position according to each voltage value sent by the touch trace.
  • the contact position with the touch display panel has a certain area. The above is to determine the touch area of the user's finger, and then determine the center position of the touch area as the touch position, and the center position of the touch area may be the centroid of the touch area.
  • the processor can be a host computer, an FPGA (Field Programmable Gata Array, Field Programmable Gate Array) or a driver IC (Integrated Circuit, integrated circuit) chip; the touch display panel and the processor can be directly routed through wiring It can also be connected through the USB (Universal Serial Bus, Universal Serial Bus) interface.
  • FPGA Field Programmable Gata Array, Field Programmable Gate Array
  • driver IC Integrated Circuit, integrated circuit
  • the initial touch position obtained by the processor is at least two.
  • the processor may obtain the touch pressure value corresponding to each initial touch position, determine the initial touch position with the largest touch pressure value as the final touch position, and match the final touch position with the target virtual key The coordinates of each area in the target area are compared, and other initial touch positions whose touch pressure value is less than the maximum touch pressure value are ignored.
  • Step 103 Determine target waveform parameters according to the positional relationship between the touch position and each area in the target area corresponding to the target virtual key; the target virtual key is any one of the virtual keys.
  • any virtual key is used as the target virtual key, the target area corresponding to the target virtual key is divided into areas, and the target area is divided into the key inner area, the key boundary area and the key outer area, that is, the target area Including key inner area, key boundary area and key outer area.
  • the target area corresponding to the target virtual key is an area 30 surrounded by a dotted frame, and by dividing the target area 30 corresponding to the target virtual key, the area shown in FIGS. 3 to 6 can be obtained.
  • a schematic diagram of the division, as shown in Figures 3 to 6, the target area 30 corresponding to the target virtual key includes a key internal area 31, a key boundary area 32 and a key external area 33, the key boundary area 32 surrounds the key internal area 31, and the key external area 33 is located on the side of the key boundary area 32 away from the key inner area 31, and the key inner area 31 is in the shape of a closed figure, such as a circle, a rectangle, a triangle, a hexagon, and the like.
  • the processor After acquiring the touch position of the user, the processor compares the touch position with the coordinate positions of the key inner area, the key boundary area and the key outer area in the target area corresponding to the target virtual key respectively, and determines that the touch position is Which of the key inner area, key boundary area, and key outer area is located.
  • the processor determines the area where the touch position is located, the corresponding target waveform parameters are determined according to the area where the touch position is located; and the target waveform parameters corresponding to the key boundary area are the same as the target waveform corresponding to the key internal area. The parameters are different from the target waveform parameters corresponding to the outer area of the key.
  • the target waveform parameters include waveform type, frequency and amplitude; the waveform type may be sine wave, square wave, sawtooth wave, pulse wave and so on.
  • Step 104 generating a target driving signal according to the target waveform parameter, and sending the target driving signal to the piezoelectric element, so that the piezoelectric element drives the touch display panel to vibrate.
  • a waveform generator and a piezoelectric element are further provided in the electronic device, and the waveform generator is respectively connected with the processor and the piezoelectric element.
  • the piezoelectric element may be a piezoelectric ceramic sheet attached to the touch display panel or a piezoelectric ceramic film formed on the touch display panel, which includes a first electrode, a second electrode, and a The piezoelectric layer between the second electrodes, the material of the piezoelectric layer may be piezoelectric ceramic (Piezoelectric Ceramic, PZT).
  • the touch display panel includes a touch area and an edge area surrounding the touch area
  • the piezoelectric element is located in the edge area of the touch display panel, and the piezoelectric element does not contact the touch wires disposed in the edge area.
  • the target waveform parameters are sent to the waveform generator, and the waveform generator generates the target drive signal according to the target waveform parameters. Then, the waveform generator sends the target drive signal to the piezoelectric element. After receiving the target driving signal, the vibration is performed, thereby driving the touch display panel to vibrate. Therefore, at the touch position, a surface friction force is generated between the user's finger and the surface of the touch display panel.
  • the target driving signal generated when the touch position is located in the key boundary area is different from that when the touch position is located in the key inner area.
  • the generated target driving signal is different from the target driving signal generated when the touch position is located in the outer area of the key.
  • the target driving signal generated when the touch position is located in the inner area of the button and the target driving signal generated when the touch position is located in the outer area of the button may be the same or different.
  • the target driving signal provided to the piezoelectric element is different, so that the friction force between the finger and the surface of the touch display panel is also different.
  • the surface of the display panel moves, the user can feel the boundaries of the virtual keys, so that the virtual keys have a physical sense when they are touched.
  • the corresponding target waveform parameter is waveform parameter 1, and the generated target driving signal is the driving signal 1;
  • the corresponding target The waveform parameter is waveform parameter 2, and the generated target drive signal is drive signal 2;
  • the corresponding target waveform parameter is waveform parameter 3, and the generated target drive signal is drive signal 3 .
  • the waveform parameter 2 is different from the waveform parameter 1 and the waveform parameter 3, and the driving signal 2 is also different from the driving signal 1 and the driving signal 3. Therefore, when the position where the user's finger starts to touch is located in the inner area of the button, the driving signal is used as the driving signal.
  • the piezoelectric element Control the piezoelectric element to vibrate. At this time, the frictional touch brought by the driving signal 1 can be sensed.
  • the piezoelectric element is controlled by the driving signal 2 to vibrate.
  • the driving signal 3 When the tactile force of friction brought by the driving signal 2 can be sensed, when the user's finger continues to move into the outer area of the key, the piezoelectric element is controlled by the driving signal 3 to vibrate. At this time, the driving signal 3 can be sensed. Therefore, when the finger moves on the surface of the touch display panel, the friction force in different areas can be sensed, and the virtual key can be sensed. border.
  • the drive signal 2 is different from the drive signal 1 and the drive signal 3, but the drive signal 1 and the drive signal 3 may be the same or different.
  • each area of the touch display panel vibrate in the vibration mode brought by the same target drive signal, that is, only one target drive signal is provided to the piezoelectric element at the same time.
  • each area of the touch display panel is vibrated with the same vibration amplitude, vibration frequency and vibration waveform; in addition, when the touch display panel is an external touch display panel, due to the interval between the display panel and the touch panel Therefore, the vibration of the piezoelectric element can only drive the touch panel to vibrate, while the display panel does not vibrate.
  • the key boundary area may be only one area.
  • the target area includes only one key boundary area 32;
  • the key boundary area is divided into a plurality of boundary sub-areas, as shown in FIG. 3 and FIG. 6 , the key boundary area includes two boundary sub-areas, which are respectively a first boundary sub-area 321 and a second boundary sub-area 322, as shown in FIG. 4,
  • the button boundary area includes 13 boundary sub-areas, which are respectively 1 first boundary sub-area 321 and 12 second boundary sub-areas 322, and the 12 second boundary sub-areas 322 are Same shape and size.
  • the key boundary area includes at least two boundary sub-areas; for the adjacent first boundary sub-areas and the second boundary sub-area, the target driving signal generated when the touch position is located in the first boundary sub-area is different from the touch The target driving signals generated when the control position is located in the second boundary sub-region are different.
  • the button boundary area By subdividing the button boundary area, it is divided into multiple boundary sub-areas.
  • the user's touch position is located in the target waveform parameter corresponding to the first boundary sub-area, and the touch position is located in the second boundary sub-area.
  • the target waveform parameters are different.
  • the target driving signal generated when the touch position is located in the first boundary sub-area is different from the target driving signal generated when the touch position is located in the second boundary sub-area.
  • the corresponding target waveform parameter is waveform parameter 1, and the generated target drive signal is drive signal 1;
  • the corresponding target waveform parameter is waveform parameter 4, and the generated target drive signal is drive signal 4;
  • the touch position is located in the key boundary area 32
  • its corresponding target waveform parameter is waveform parameter 5
  • the generated target drive signal is drive signal 5;
  • the touch position is within the key outer region 33, its corresponding target waveform parameter is the waveform parameter 3, and the generated target driving signal is the driving signal 3.
  • waveform parameter 4 is different from waveform parameter 5, and waveform parameter 4 is different from waveform parameter 1, and waveform parameter 5 is also different from waveform parameter 3; correspondingly, driving signal 4 is different from driving signal 5, and driving signal 4 is different from driving signal 1. Differently, the drive signal 5 and the drive signal 3 are also different.
  • the piezoelectric element drives the touch display panel to vibrate, and when the driving signals provided to the piezoelectric element are different, the frictional force between the finger and the surface of the touch display panel is also different, so the finger can clearly feel The friction force to different areas changes.
  • the finger moves on the surface of the touch display panel, the user can feel the boundary of the virtual button, so that the virtual button has more realistic tactile feedback and improves the user's touch experience effect.
  • FIG. 7 a flowchart of another virtual key haptic feedback method according to an embodiment of the present application is shown, which may specifically include the following steps:
  • Step 701 Control the touch display panel to display at least one virtual key.
  • Step 702 Acquire the touch position detected by the touch display panel.
  • Step 703 when the touch position is located in the inner region of the button, according to the mapping relationship between each region in the target region and the waveform parameters, search for the first waveform parameter corresponding to the inner region of the button.
  • the electronic device is further provided with a memory, the memory is connected to the processor, and the memory stores the mapping relationship between each area in the target area and the waveform parameters, that is, the key internal area and the key boundary area are stored in the memory.
  • the mapping relationship between the external area of the button and the corresponding waveform parameters is further provided with a memory, the memory is connected to the processor, and the memory stores the mapping relationship between each area in the target area and the waveform parameters, that is, the key internal area and the key boundary area are stored in the memory.
  • the processor determines that the touch position is within the inner area of the button, it searches for the first waveform parameter corresponding to the inner area of the button from the mapping relationship between each area in the target area and the waveform parameters stored in the memory. At this time, the target waveform parameter is the first waveform parameter.
  • Step 704 generating a first driving signal according to the first waveform parameter, and sending the first driving signal to the piezoelectric element, so that the piezoelectric element drives the touch display panel to vibrate.
  • the processor after finding the first waveform parameter, sends the first waveform parameter to the waveform generator, the waveform generator generates the first driving signal according to the first waveform parameter, and then the waveform generator sends the first waveform parameter to the waveform generator.
  • a drive signal is sent to the piezoelectric element, and the piezoelectric element vibrates after receiving the first drive signal, thereby driving the touch display panel to vibrate.
  • the target drive signal is the first drive signal.
  • Step 705 when the touch position is within the button boundary area, search for the second waveform parameter corresponding to the button boundary area according to the mapping relationship between each area in the target area and the waveform parameters.
  • the processor when the processor determines that the touch position is located within the button boundary area, the processor searches for the second waveform parameter corresponding to the button boundary area from the mapping relationship between each area in the target area and the waveform parameters stored in the memory , at this time, the target waveform parameter is the second waveform parameter.
  • Step 706 generating a second driving signal according to the second waveform parameter, and sending the second driving signal to the piezoelectric element, so that the piezoelectric element drives the touch display panel to vibrate.
  • the processor after finding the second waveform parameter, sends the second waveform parameter to the waveform generator, the waveform generator generates the second driving signal according to the second waveform parameter, and then the waveform generator sends the second waveform parameter to the waveform generator.
  • the second driving signal is sent to the piezoelectric element, and the piezoelectric element vibrates after receiving the second driving signal, thereby driving the touch display panel to vibrate.
  • the target driving signal is the second driving signal.
  • Step 707 when the touch position is located in the outer region of the button, according to the mapping relationship between each region in the target region and the waveform parameters, search for the third waveform parameter corresponding to the outer region of the button.
  • the processor determines that the touch position is located in the outer region of the button
  • the third waveform parameter corresponding to the outer region of the button is searched from the mapping relationship between each region in the target region and the waveform parameters stored in the memory , at this time, the target waveform parameter is the third waveform parameter.
  • Step 708 generating a third driving signal according to the third waveform parameter, and sending the third driving signal to the piezoelectric element, so that the piezoelectric element drives the touch display panel to vibrate.
  • the processor after finding the third waveform parameter, sends the third waveform parameter to the waveform generator, and the waveform generator generates the third driving signal according to the third waveform parameter, and then the waveform generator sends the third waveform parameter to the waveform generator.
  • the three driving signals are sent to the piezoelectric element, and the piezoelectric element vibrates after receiving the third driving signal, thereby driving the touch display panel to vibrate.
  • the target driving signal is the third driving signal.
  • the first waveform parameter, the second waveform parameter and the third waveform parameter are all different.
  • the first drive signal generated by the first waveform parameter, the second drive signal generated by the second waveform parameter, and the third waveform parameter are all different, that is, the first driving signal is different from the second driving signal, the second driving signal is different from the third driving signal, and the first driving signal is also different from the third driving signal.
  • Step 709 when the duration of the touch position being touched exceeds a preset duration, stop sending the target driving signal to the piezoelectric element.
  • the user when a target driving signal is generated according to the touch position of the user, and the piezoelectric element is controlled to vibrate by the target driving signal to drive the touch display panel to vibrate, the user can touch the touch display panel with a finger
  • the friction between the surfaces senses the boundaries of the virtual keys.
  • the processor sends a stop output signal to the waveform generator, so that the waveform generator stops sending the target drive signal to the piezoelectric element, thereby controlling the piezoelectric element.
  • the element no longer vibrates, and accordingly, the piezoelectric element no longer drives the touch display panel to vibrate.
  • the piezoelectric element When the user touches the same touch position for a long time, the piezoelectric element will continue to drive the touch display panel to vibrate. After the touch time exceeds the preset time, the user's finger is easily damaged by the touch display for a long time and vibration. The panel is paralyzed by contact, and it is not easy to perceive the boundaries of the virtual keys after the fingers are paralyzed. Therefore, when the user touches the same touch position for longer than the preset time, it will stop sending the target drive signal to the piezoelectric element. , thereby reducing the power consumption of electronic equipment.
  • the preset duration can be set according to experience values, such as 10s, 20s, etc.
  • the piezoelectric element drives the touch display panel to vibrate, and when the driving signals provided to the piezoelectric element are different, the frictional force between the finger and the surface of the touch display panel is also different, so the finger can clearly feel
  • the friction force to different areas changes, and when the finger moves on the surface of the touch display panel, the user can feel the boundary of the virtual button, so that the virtual button has more realistic tactile feedback and improves the user's touch experience effect; and , when the user touches the same touch position for a duration exceeding a preset duration, stop sending the target drive signal to the piezoelectric element, thereby reducing the power consumption of the electronic device.
  • FIG. 8 a schematic structural diagram of a haptic feedback device for virtual keys according to an embodiment of the present application is shown.
  • the tactile feedback device 800 for virtual keys in this embodiment of the present application is applied to an electronic device.
  • the electronic device includes a touch display panel and at least one piezoelectric element.
  • the tactile feedback device 800 for virtual keys includes a processor 801 and a waveform generator 802.
  • the generator 801 is connected to the waveform generator 802 .
  • the processor 801 is configured to control the touch display panel to display at least one virtual key; acquire the touch position detected by the touch display panel; and according to the touch position corresponding to the target virtual key; The positional relationship between each area in the target area determines the target waveform parameter; the target virtual key is any one of the virtual keys;
  • the waveform generator 802 is configured to generate a target drive signal according to the target waveform parameter, and send the target drive signal to the piezoelectric element, so that the piezoelectric element drives the touch display panel to perform vibration;
  • the target area includes a key inner area, a key boundary area, and a key outer area
  • the target driving signal generated when the touch position is located in the key boundary area is different from the touch position located inside the key.
  • the target driving signal generated when the touch position is within the area is different from the target driving signal generated when the touch position is within the outer area of the key.
  • the processor 801 is specifically configured to: when the touch position is located in the inner area of the button, according to the mapping relationship between each area in the target area and the waveform parameters, find the inner area of the button.
  • the first drive signal generated by the first waveform parameter, the second drive signal generated by the second waveform parameter, and the third drive signal generated by the third waveform parameter are all different.
  • the electronic device is further provided with a memory 803, the memory 803 is connected to the processor 801, and the memory 803 stores the mapping relationship between each area in the target area and the waveform parameters.
  • the key boundary area includes at least two boundary sub-areas
  • the target driving signal generated when the touch position is located in the first border sub-region is the same as the touch position in the second border
  • the target drive signals generated are different when the sub-regions are located.
  • the waveform generator 802 is further configured to stop sending the target drive signal to the piezoelectric element when the touch position is touched for a duration exceeding a preset duration.
  • the touch display panel includes a touch area and an edge area surrounding the touch area, the piezoelectric element is located in the edge area, and the piezoelectric element is connected to the edge area provided in the edge area.
  • the touch traces do not touch.
  • the piezoelectric element drives the touch display panel to vibrate, and when the driving signals provided to the piezoelectric element are different, the frictional force between the finger and the surface of the touch display panel is also different, so the finger can clearly feel The friction force to different areas changes.
  • the finger moves on the surface of the touch display panel, the user can feel the boundary of the virtual button, so that the virtual button has more realistic tactile feedback and improves the user's touch experience effect.
  • FIG. 9 a schematic structural diagram of an electronic device according to an embodiment of the present application is shown.
  • the electronic device in this embodiment of the present application includes a touch display panel 901, at least one piezoelectric element 902, and the above-mentioned haptic feedback device 800 for virtual keys; wherein, the haptic feedback device 800 for virtual keys is respectively connected to the touch display panel 901 and the piezoelectric device 800. Element 903 is connected.
  • the touch display panel 901 When the touch display panel 901 is an external touch display panel, it includes a display panel and a touch panel disposed on the light-emitting side of the display panel. In this case, the piezoelectric element 902 is located on the side of the touch panel close to the display panel, or , the piezoelectric element 902 is located on the side of the touch panel away from the display panel; when the touch display panel 901 is an in-cell touch display panel, the piezoelectric element 902 is located on the light-emitting side of the touch display panel 901 .
  • the tactile feedback device 800 for virtual keys includes a processor 801 and a waveform generator 802.
  • a driver chip may be integrated inside the processor 801.
  • the processor 801 is connected to the touch display panel 901 and the waveform generator 802 respectively, and the waveform The generator 802 is connected to the piezoelectric element 902 .
  • the piezoelectric element drives the touch display panel to vibrate, and when the driving signals provided to the piezoelectric element are different, the frictional force between the finger and the surface of the touch display panel is also different, so the finger can clearly feel The friction force to different areas changes.
  • the finger moves on the surface of the touch display panel, the user can feel the boundary of the virtual button, so that the virtual button has more realistic tactile feedback and improves the user's touch experience effect.
  • any reference signs placed between parentheses shall not be construed as limiting the claim.
  • the word “comprising” does not exclude the presence of elements or steps not listed in a claim.
  • the word “a” or “an” preceding an element does not exclude the presence of a plurality of such elements.
  • the application can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by one and the same item of hardware.
  • the use of the words first, second, and third, etc. do not denote any order. These words can be interpreted as names.

Abstract

本申请提供了一种虚拟按键的触觉反馈方法、装置及电子设备，涉及压电技术领域。本申请通过控制触控显示面板显示至少一个虚拟按键，获取触控显示面板检测到的触控位置，根据触控位置与目标虚拟按键所对应的目标区域中的各区域之间的位置关系确定目标波形参数，根据目标波形参数生成目标驱动信号，并向压电元件发送目标驱动信号。通过对目标虚拟按键所对应的目标区域进行划分，当手指触控到不同区域时，提供不同的驱动信号控制压电元件振动以带动触控显示面板振动，因此，当手指在触控显示面板表面移动时，就能够感受到虚拟按键的边界，从而使得虚拟按键具有更真实的触觉反馈。

Description

虚拟按键的触觉反馈方法、装置及电子设备 技术领域
本申请涉及压电技术领域，特别是涉及虚拟按键的触觉反馈方法、装置及电子设备。
背景技术
随着电子技术的不断发展，目前的电子设备中通常设置有触控显示面板，基于触控显示面板可提供与用户的人机交互功能，由于触控显示面板的存在，物理按键已逐渐被虚拟按键所代替。
但是，用户在对虚拟按键进行操作时，缺少真实的触觉反馈，用户的体验效果不好。
概述
本公开一些实施例提供了如下技术方案：
第一方面，提供了一种虚拟按键的触觉反馈方法，应用于电子设备，所述电子设备包括触控显示面板和至少一个压电元件，所述方法包括：
控制所述触控显示面板显示至少一个虚拟按键；
获取所述触控显示面板检测到的触控位置；
根据所述触控位置与目标虚拟按键所对应的目标区域中的各区域之间的位置关系，确定目标波形参数；所述目标虚拟按键为任意一个所述虚拟按键；
根据所述目标波形参数生成目标驱动信号，并向所述压电元件发送所述目标驱动信号，以使所述压电元件带动所述触控显示面板进行振动；
其中，所述目标区域包括按键内部区域、按键边界区域和按键外部区域，所述触控位置位于所述按键边界区域内时所生成的目标驱动信号，与所述触控位置位于所述按键内部区域内时所生成的目标驱动信号和所述触控位置位于所述按键外部区域内时所生成的目标驱动信号不同。
可选的，所述根据所述触控位置与目标虚拟按键所对应的目标区域中的各区域之间的位置关系，确定目标波形参数的步骤，包括：
当所述触控位置位于所述按键内部区域内时，根据所述目标区域中的各区域与波形参数的映射关系，查找所述按键内部区域对应的第一波形参数；
当所述触控位置位于所述按键边界区域内时，根据所述目标区域中的各区域与波形参数的映射关系，查找所述按键边界区域对应的第二波形参数；
当所述触控位置位于所述按键外部区域内时，根据所述目标区域中的各区域与波形参数的映射关系，查找所述按键外部区域对应的第三波形参数；
其中，所述第一波形参数所生成的第一驱动信号、所述第二波形参数所生成的第二驱动信号以及所述第三波形参数所生成的第三驱动信号均不同。
可选的，所述按键边界区域包括至少两个边界子区域；
针对相邻的第一边界子区域和第二边界子区域，所述触控位置位于所述第一边界子区域内时所生成的目标驱动信号，与所述触控位置位于所述第二边界子区域内时所生成的目标驱动信号不同。
可选的，在所述根据所述目标波形参数生成目标驱动信号，并向所述压电元件发送所述目标驱动信号，以使所述压电元件带动所述触控显示面板进行振动的步骤之后，还包括：
当所述触控位置被触控的时长超过预设时长时，停止向所述压电元件发送所述目标驱动信号。
可选的，所述触控显示面板包括触控区和包围所述触控区的边缘区，所述压电元件位于所述边缘区，且所述压电元件与所述边缘区内设置的触控走线不接触。
第二方面，提供了一种虚拟按键的触觉反馈装置，应用于电子设备，所述电子设备包括触控显示面板和至少一个压电元件，所述装置包括处理器和波形发生器；
所述处理器，被配置为控制所述触控显示面板显示至少一个虚拟按键；获取所述触控显示面板检测到的触控位置；以及根据所述触控位置与目标虚拟按键所对应的目标区域中的各区域之间的位置关系，确定目标波形参数；所述目标虚拟按键为任意一个所述虚拟按键；
所述波形发生器，被配置为根据所述目标波形参数生成目标驱动信号，并向所述压电元件发送所述目标驱动信号，以使所述压电元件带动所述触控 显示面板进行振动；
其中，所述目标区域包括按键内部区域、按键边界区域和按键外部区域，所述触控位置位于所述按键边界区域内时所生成的目标驱动信号，与所述触控位置位于所述按键内部区域内时所生成的目标驱动信号和所述触控位置位于所述按键外部区域内时所生成的目标驱动信号不同。
可选的，所述处理器具体被配置为：当所述触控位置位于所述按键内部区域内时，根据所述目标区域中的各区域与波形参数的映射关系，查找所述按键内部区域对应的第一波形参数；当所述触控位置位于所述按键边界区域内时，根据所述目标区域中的各区域与波形参数的映射关系，查找所述按键边界区域对应的第二波形参数；当所述触控位置位于所述按键外部区域内时，根据所述目标区域中的各区域与波形参数的映射关系，查找所述按键外部区域对应的第三波形参数；
其中，所述第一波形参数所生成的第一驱动信号、所述第二波形参数所生成的第二驱动信号以及所述第三波形参数所生成的第三驱动信号均不同。
可选的，所述按键边界区域包括至少两个边界子区域；
针对相邻的第一边界子区域和第二边界子区域，所述触控位置位于所述第一边界子区域内时所生成的目标驱动信号，与所述触控位置位于所述第二边界子区域内时所生成的目标驱动信号不同。
可选的，所述波形发生器，还被配置为当所述触控位置被触控的时长超过预设时长时，停止向所述压电元件发送所述目标驱动信号。
可选的，所述触控显示面板包括触控区和包围所述触控区的边缘区，所述压电元件位于所述边缘区，且所述压电元件与所述边缘区内设置的触控走线不接触。
第三方面，提供了一种电子设备，包括：触控显示面板、至少一个压电元件以及上述的虚拟按键的触觉反馈装置；
其中，所述虚拟按键的触觉反馈装置分别与所述触控显示面板和所述压电元件连接。
在本申请实施例中，通过控制触控显示面板显示至少一个虚拟按键，获取触控显示面板检测到的触控位置，根据触控位置与目标虚拟按键所对应的 目标区域中的各区域之间的位置关系，确定目标波形参数，根据目标波形参数生成目标驱动信号，并向压电元件发送目标驱动信号，以使压电元件带动触控显示面板进行振动；其中，目标区域包括按键内部区域、按键边界区域和按键外部区域，触控位置位于按键边界区域内时所生成的目标驱动信号，与触控位置位于按键内部区域内时所生成的目标驱动信号和触控位置位于按键外部区域内时所生成的目标驱动信号不同。通过对目标虚拟按键所对应的目标区域进行区域划分，当用户的手指触控到目标虚拟按键的不同区域时，可调用不同的驱动信号来驱动压电元件进行振动，进而使得压电元件带动触控显示面板进行振动，并且，当提供给压电元件的驱动信号不同时，手指与触控显示面板的表面之间的摩擦力也就不同，因此，手指可以清楚的感受到不同区域的摩擦力变化，当手指在触控显示面板的表面移动时，用户就能够感受到虚拟按键的边界，从而使得虚拟按键具有更真实的触觉反馈，提高用户的触控体验效果。
上述说明仅是本公开技术方案的概述，为了能够更清楚了解本公开的技术手段，而可依照说明书的内容予以实施，并且为了让本公开的上述和其它目的、特征和优点能够更明显易懂，以下特举本公开的具体实施方式。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1示意性地示出了本申请实施例的一种虚拟按键的触觉反馈方法的流程图；
图2示意性地示出了本申请实施例中的触控显示面板显示的虚拟键盘的示意图；
图3示意性地示出了本申请实施例的第一种目标虚拟按键所对应的目标区域的划分示意图；
图4示意性地示出了本申请实施例的第二种目标虚拟按键所对应的目标区域的划分示意图；
图5示意性地示出了本申请实施例的第三种目标虚拟按键所对应的目标区域的划分示意图；
图6示意性地示出了本申请实施例的第四种目标虚拟按键所对应的目标区域的划分示意图；
图7示意性地示出了本申请实施例的另一种虚拟按键的触觉反馈方法的流程图；
图8示意性地示出了本申请实施例的一种虚拟按键的触觉反馈装置的结构示意图；
图9示意性地示出了本申请实施例的一种电子设备的结构示意图。
具体实施例
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
参照图1，示出了本申请实施例的一种虚拟按键的触觉反馈方法的流程图，应用于电子设备，该电子设备包括触控显示面板和至少一个压电元件，具体可以包括如下步骤：
步骤101，控制所述触控显示面板显示至少一个虚拟按键。
在本申请实施例中，电子设备包括触控显示面板，该触控显示面板可以为外挂式触控显示面板或内嵌式触控显示面板，当触控显示面板为外挂式触控显示面板时，触控显示面板包括显示面板和设置在显示面板出光侧的触控面板，当触控显示面板为内嵌式触控显示面板时，触控电极可内嵌到显示面板内部。其中，该显示面板可以为LCD(Liquid Crystal Display，液晶显示器)显示面板，也可以为OLED(Organic Light-Emitting Diode，有机发光二极管)显示面板。
在实际应用中，触控显示面板与驱动芯片连接，驱动芯片包括栅极驱动芯片和源极驱动芯片，栅极驱动芯片向触控显示面板发送对应的栅极信号，源极驱动芯片向触控显示面板发送对应的数据信号，以控制触控显示面板显 示目标画面，该目标画面为包括至少一个虚拟按键的画面。
如图2所示，触控显示面板显示的目标画面包括虚拟键盘20，虚拟键盘20包括多个虚拟按键21。
需要说明的是，驱动芯片可以集成到处理器中，即处理器包括驱动芯片，此时，触控显示面板是与处理器连接；当然，驱动芯片和处理器也可以单独设置，此时，触控显示面板与驱动芯片连接。
步骤102，获取所述触控显示面板检测到的触控位置。
在本申请实施例中，触控显示面板包括触控区和包围触控区的边缘区，在触控区设置有多个触控电极，在边缘区设置有与触控电极连接的触控走线，该触控走线还与处理器连接。
当用户的手指触控到触控显示面板的表面上时，触控位置处的触控电极所对应的触控电容的电压值会发生变化，触控走线将各个位置处的触控电极对应的电压值发送至处理器，处理器根据触控走线发送的各个电压值，确定出用户的触控位置。
在实际使用过程中，由于手指在触控显示面板的表面上进行触控时，与触控显示面板接触的位置具有一定的面积，因此，处理器根据触控走线发送的各个电压值，实际上是确定出用户手指的触控区域，然后，将触控区域的中心位置确定为触控位置，触控区域的中心位置可以为触控区域的形心。
在实际产品中，处理器可以为上位机、FPGA(Field Programmable Gata Array，现场可编程逻辑门阵列)或驱动IC(Integrated Circuit，集成电路)芯片；触控显示面板与处理器可以直接通过走线连接，也可以通过USB(Universal Serial Bus，通用串行走线)接口连接。
需要说明的是，在实际使用过程中，用户的手指可能会发生误触，此时，处理器获取到的初始触控位置为至少两个，为了保证可以准确确定用户需要触控的虚拟按键，处理器可获取每个初始触控位置对应的触控压力值，将触控压力值最大的初始触控位置确定为最终的触控位置，并将该最终的触控位置与目标虚拟按键所对应的目标区域中的各区域的坐标进行对比，而触控压力值小于最大触控压力值的其他初始触控位置忽略。
步骤103，根据所述触控位置与目标虚拟按键所对应的目标区域中的各 区域之间的位置关系，确定目标波形参数；所述目标虚拟按键为任意一个所述虚拟按键。
在本申请实施例中，将任意一个虚拟按键作为目标虚拟按键，对目标虚拟按键所对应的目标区域进行区域划分，将目标区域划分为按键内部区域、按键边界区域和按键外部区域，即目标区域包括按键内部区域、按键边界区域和按键外部区域。
如图2所示，目标虚拟按键所对应的目标区域为虚线框所围成的区域30，对目标虚拟按键所对应的目标区域30进行区域划分，可得到如图3至图6所示的区域划分示意图，如图3至图6所示，目标虚拟按键所对应的目标区域30包括按键内部区域31、按键边界区域32和按键外部区域33，按键边界区域32包围按键内部区域31，按键外部区域33位于按键边界区域32远离按键内部区域31的一侧，按键内部区域31的形状为封闭图形，如圆形、矩形、三角形、六边形等。
处理器在获取到用户的触控位置之后，将触控位置与目标虚拟按键所对应的目标区域中的按键内部区域、按键边界区域和按键外部区域的坐标位置分别进行对比，确定触控位置是位于按键内部区域、按键边界区域和按键外部区域中的哪一个区域。
当处理器确定了触控位置所处的区域之后，根据触控位置所处的区域确定对应的目标波形参数；并且，按键边界区域所对应的目标波形参数，与按键内部区域所对应的目标波形参数和按键外部区域所对应的目标波形参数不同。
其中，目标波形参数包括波形种类、频率和幅值；波形种类可以为正弦波、方波、锯齿波、脉冲波等。
步骤104，根据所述目标波形参数生成目标驱动信号，并向所述压电元件发送所述目标驱动信号，以使所述压电元件带动所述触控显示面板进行振动。
在本申请实施例中，在电子设备中还设置有波形发生器和压电元件，波形发生器分别与处理器和压电元件连接。其中，压电元件可以为贴附在触控显示面板上的压电陶瓷片或形成在触控显示面板上的压电陶瓷膜，其包括第 一电极、第二电极和设置在第一电极和第二电极之间的压电层，该压电层的材料可以为压电陶瓷(Piezoelectric Ceramic，PZT)。
可选的，触控显示面板包括触控区和包围触控区的边缘区，压电元件位于触控显示面板的边缘区，且压电元件与边缘区内设置的触控走线不接触。
通过在触控显示面板的边缘区设置压电元件，且使得压电元件与边缘区内设置的触控走线不接触，以避免触控走线与压电元件之间的串扰，从而提高触控位置的检测精度和触觉反馈的准确性。
处理器在确定了目标波形参数之后，将目标波形参数发送给波形发生器，波形发生器根据目标波形参数生成目标驱动信号，然后，波形发生器将目标驱动信号发送给压电元件，压电元件在接收到目标驱动信号之后进行振动，从而带动触控显示面板进行振动，因此，在触控位置处，用户的手指与触控显示面板的表面之间会产生表面摩擦力。
并且，由于按键边界区域与按键内部区域和按键外部区域所对应的目标波形参数不同，因此，触控位置位于按键边界区域内时所生成的目标驱动信号，与触控位置位于按键内部区域内时所生成的目标驱动信号和触控位置位于按键外部区域内时所生成的目标驱动信号不同。此时，触控位置位于按键内部区域内时所生成的目标驱动信号和触控位置位于按键外部区域内时所生成的目标驱动信号可以相同，也可以不同。
当用户的手指触控到目标虚拟按键的不同区域时，其提供给压电元件的目标驱动信号不同，使得手指与触控显示面板的表面之间的摩擦力也不同，因此，当用户在触控显示面板的表面移动时，用户就能够感受到虚拟按键的边界，使得虚拟按键在触控时具有实体感。
例如，当触控位置位于按键内部区域内时，其对应的目标波形参数为波形参数1，所生成的目标驱动信号为驱动信号1；当触控位置位于按键边界区域内时，其对应的目标波形参数为波形参数2，所生成的目标驱动信号为驱动信号2；当触控位置位于按键外部区域内时，其对应的目标波形参数为波形参数3，所生成的目标驱动信号为驱动信号3。并且，波形参数2不同于波形参数1和波形参数3，驱动信号2也不同于驱动信号1和驱动信号3，因此，当用户的手指开始触控的位置位于按键内部区域内时，以驱动信号1 控制压电元件进行振动，此时，可感知到驱动信号1所带来的摩擦力触感，当用户的手指继续移动到按键边界区域内时，以驱动信号2控制压电元件进行振动，此时，可感知到驱动信号2带来的摩擦力触感，当用户的手指继续移动到按键外部区域内时，以驱动信号3控制压电元件进行振动，此时，可感知到驱动信号3带来的摩擦力触感，而驱动信号不同所带来的摩擦力触感也就不一样，因此，手指在触控显示面板的表面进行移动时，就可感知到不同区域的摩擦力变化，从而感知虚拟按键的边界。此外，驱动信号2不同于驱动信号1和驱动信号3，但是，驱动信号1和驱动信号3可以相同也可以不同。
需要说明的是，在同一时刻，触控显示面板的所有区域都以同一种目标驱动信号所带来的振动模式进行振动，即同一时刻仅向压电元件提供一种目标驱动信号，压电元件振动后带动触控显示面板的各个区域均以相同的振动幅度、振动频率和振动波形进行振动；此外，当触控显示面板为外挂式触控显示面板，由于显示面板和触控面板之间间隔一定距离，因此，压电元件振动仅能带动触控面板进行振动，而显示面板不振动。
在实际应用过程中，在对目标虚拟按键所对应的目标区域进行区域划分时，按键边界区域可以仅为一个区域，如图5所示，目标区域仅包括一个按键边界区域32；当然，也可以将按键边界区域划分为多个边界子区域，如图3和图6所示，按键边界区域包括两个边界子区域，其分别为1个第一边界子区域321和1个第二边界子区域322，如图4所示，按键边界区域包括13个边界子区域，其分别为1个第一边界子区域321和12个第二边界子区域322，且这12个第二边界子区域322的形状、大小均相同。
具体的，按键边界区域包括至少两个边界子区域；针对相邻的第一边界子区域和第二边界子区域，触控位置位于第一边界子区域内时所生成的目标驱动信号，与触控位置位于第二边界子区域内时所生成的目标驱动信号不同。
通过对按键边界区域进行细分，将其划分为多个边界子区域，用户的触控位置位于第一边界子区域所对应的目标波形参数，与触控位置位于第二边界子区域所对应的目标波形参数不同，相应的，触控位置位于第一边界子区 域内时所生成的目标驱动信号，与触控位置位于第二边界子区域内时所生成的目标驱动信号也不同，使得用户在触控显示面板上进行移动时，能够更清楚地感受到虚拟按键的边界。
例如，如图3、图4和图6所示，当触控位置位于按键内部区域31内时，其对应的目标波形参数为波形参数1，所生成的目标驱动信号为驱动信号1；当触控位置位于按键边界区域32中的第一边界子区域321内时，其对应的目标波形参数为波形参数4，所生成的目标驱动信号为驱动信号4；当触控位置位于按键边界区域32中的第二边界子区域322内时，其对应的目标波形参数为波形参数5，所生成的目标驱动信号为驱动信号5；当触控位置位于按键外部区域33内时，其对应的目标波形参数为波形参数3，所生成的目标驱动信号为驱动信号3。其中，波形参数4与波形参数5不同，且波形参数4与波形参数1不同，波形参数5与波形参数3也不同；相应的，驱动信号4与驱动信号5不同，驱动信号4与驱动信号1不同，驱动信号5与驱动信号3也不同。
在本申请实施例中，通过对目标虚拟按键所对应的目标区域进行区域划分，当用户的手指触控到目标虚拟按键的不同区域时，可调用不同的驱动信号来驱动压电元件进行振动，进而使得压电元件带动触控显示面板进行振动，并且，当提供给压电元件的驱动信号不同时，手指与触控显示面板的表面之间的摩擦力也就不同，因此，手指可以清楚的感受到不同区域的摩擦力变化，当手指在触控显示面板的表面移动时，用户就能够感受到虚拟按键的边界，从而使得虚拟按键具有更真实的触觉反馈，提高用户的触控体验效果。
参照图7，示出了本申请实施例的另一种虚拟按键的触觉反馈方法的流程图，具体可以包括如下步骤：
步骤701，控制所述触控显示面板显示至少一个虚拟按键。
此步骤与上述步骤101原理类似，在此不再赘述。
步骤702，获取所述触控显示面板检测到的触控位置。
此步骤与上述步骤102原理类似，在此不再赘述。
步骤703，当所述触控位置位于所述按键内部区域内时，根据所述目标区域中的各区域与波形参数的映射关系，查找所述按键内部区域对应的第一 波形参数。
在本申请实施例中，在电子设备中还设置有存储器，存储器与处理器连接，在存储器中存储有目标区域中的各区域与波形参数的映射关系，即存储有按键内部区域、按键边界区域和按键外部区域和各自对应的波形参数的映射关系。
当处理器确定触控位置位于按键内部区域内时，从存储器中存储的目标区域中的各区域与波形参数的映射关系中，查找按键内部区域对应的第一波形参数，此时，目标波形参数为第一波形参数。
步骤704，根据所述第一波形参数生成第一驱动信号，并向所述压电元件发送所述第一驱动信号，以使所述压电元件带动所述触控显示面板进行振动。
在本申请实施例中，处理器在查找到第一波形参数之后，将第一波形参数发送给波形发生器，波形发生器根据第一波形参数生成第一驱动信号，然后，波形发生器将第一驱动信号发送给压电元件，压电元件在接收到第一驱动信号之后进行振动，从而带动触控显示面板进行振动，此时，目标驱动信号为第一驱动信号。
步骤705，当所述触控位置位于所述按键边界区域内时，根据所述目标区域中的各区域与波形参数的映射关系，查找所述按键边界区域对应的第二波形参数。
在本申请实施例中，当处理器确定触控位置位于按键边界区域内时，从存储器中存储的目标区域中的各区域与波形参数的映射关系中，查找按键边界区域对应的第二波形参数，此时，目标波形参数为第二波形参数。
步骤706，根据所述第二波形参数生成第二驱动信号，并向所述压电元件发送所述第二驱动信号，以使所述压电元件带动所述触控显示面板进行振动。
在本申请实施例中，处理器在查找到第二波形参数之后，将第二波形参数发送给波形发生器，波形发生器根据第二波形参数生成第二驱动信号，然后，波形发生器将第二驱动信号发送给压电元件，压电元件在接收到第二驱动信号之后进行振动，从而带动触控显示面板进行振动，此时，目标驱动信 号为第二驱动信号。
步骤707，当所述触控位置位于所述按键外部区域内时，根据所述目标区域中的各区域与波形参数的映射关系，查找所述按键外部区域对应的第三波形参数。
在本申请实施例中，当处理器确定触控位置位于按键外部区域内时，从存储器中存储的目标区域中的各区域与波形参数的映射关系中，查找按键外部区域对应的第三波形参数，此时，目标波形参数为第三波形参数。
步骤708，根据所述第三波形参数生成第三驱动信号，并向所述压电元件发送所述第三驱动信号，以使所述压电元件带动所述触控显示面板进行振动。
在本申请实施例中，处理器在查找到第三波形参数之后，将第三波形参数发送给波形发生器，波形发生器根据第三波形参数生成第三驱动信号，然后，波形发生器将第三驱动信号发送给压电元件，压电元件在接收到第三驱动信号之后进行振动，从而带动触控显示面板进行振动，此时，目标驱动信号为第三驱动信号。
其中，第一波形参数、第二波形参数和第三波形参数均不同，相应的，第一波形参数所生成的第一驱动信号、第二波形参数所生成的第二驱动信号以及第三波形参数所生成的第三驱动信号均不同，即第一驱动信号与第二驱动信号不同，第二驱动信号与第三驱动信号不同，第一驱动信号与第三驱动信号也不同。
步骤709，当所述触控位置被触控的时长超过预设时长时，停止向所述压电元件发送所述目标驱动信号。
在本申请实施例中，在根据用户的触控位置生成目标驱动信号，并通过该目标驱动信号控制压电元件振动，以带动触控显示面板进行振动时，用户可以通过手指与触控显示面板的表面之间的摩擦力感知虚拟按键的边界。
但是，当用户在同一个触控位置进行触控的时长超过预设时长时，处理器向波形发生器发送停止输出信号，使得波形发生器停止向压电元件发送目标驱动信号，从而控制压电元件不再进行振动，相应的，压电元件也不再带动触控显示面板进行振动。
当用户长时间在同一个触控位置进行触控时，压电元件会持续带动触控显示面板振动，触控的时长超过预设时长后，用户的手指容易因长时间与振动的触控显示面板接触而麻痹，手指麻痹后也就不容易感知到虚拟按键的边界，因此，当用户在同一个触控位置进行触控的时长超过预设时长时，会停止向压电元件发送目标驱动信号，从而降低电子设备的功耗。该预设时长可根据经验值进行设定，如10s、20s等。
在本申请实施例中，通过对目标虚拟按键所对应的目标区域进行区域划分，当用户的手指触控到目标虚拟按键的不同区域时，可调用不同的驱动信号来驱动压电元件进行振动，进而使得压电元件带动触控显示面板进行振动，并且，当提供给压电元件的驱动信号不同时，手指与触控显示面板的表面之间的摩擦力也就不同，因此，手指可以清楚的感受到不同区域的摩擦力变化，当手指在触控显示面板的表面移动时，用户就能够感受到虚拟按键的边界，从而使得虚拟按键具有更真实的触觉反馈，提高用户的触控体验效果；并且，当用户在同一个触控位置进行触控的时长超过预设时长时，停止向压电元件发送目标驱动信号，从而降低电子设备的功耗。
参照图8，示出了本申请实施例的一种虚拟按键的触觉反馈装置的结构示意图。
本申请实施例的虚拟按键的触觉反馈装置800应用于电子设备，该电子设备包括触控显示面板和至少一个压电元件，虚拟按键的触觉反馈装置800包括处理器801和波形发生器802，处理器801与波形发生器802连接。
所述处理器801，被配置为控制所述触控显示面板显示至少一个虚拟按键；获取所述触控显示面板检测到的触控位置；以及根据所述触控位置与目标虚拟按键所对应的目标区域中的各区域之间的位置关系，确定目标波形参数；所述目标虚拟按键为任意一个所述虚拟按键；
所述波形发生器802，被配置为根据所述目标波形参数生成目标驱动信号，并向所述压电元件发送所述目标驱动信号，以使所述压电元件带动所述触控显示面板进行振动；
其中，所述目标区域包括按键内部区域、按键边界区域和按键外部区域，所述触控位置位于所述按键边界区域内时所生成的目标驱动信号，与所述触 控位置位于所述按键内部区域内时所生成的目标驱动信号和所述触控位置位于所述按键外部区域内时所生成的目标驱动信号不同。
可选的，所述处理器801具体被配置为：当所述触控位置位于所述按键内部区域内时，根据所述目标区域中的各区域与波形参数的映射关系，查找所述按键内部区域对应的第一波形参数；当所述触控位置位于所述按键边界区域内时，根据所述目标区域中的各区域与波形参数的映射关系，查找所述按键边界区域对应的第二波形参数；当所述触控位置位于所述按键外部区域内时，根据所述目标区域中的各区域与波形参数的映射关系，查找所述按键外部区域对应的第三波形参数；
其中，所述第一波形参数所生成的第一驱动信号、所述第二波形参数所生成的第二驱动信号以及所述第三波形参数所生成的第三驱动信号均不同。
此时，在电子设备中还设置有存储器803，存储器803与处理器801连接，在存储器803中存储有目标区域中的各区域与波形参数的映射关系。
可选的，所述按键边界区域包括至少两个边界子区域；
针对相邻的第一边界子区域和第二边界子区域，所述触控位置位于所述第一边界子区域内时所生成的目标驱动信号，与所述触控位置位于所述第二边界子区域内时所生成的目标驱动信号不同。
可选的，所述波形发生器802，还被配置为当所述触控位置被触控的时长超过预设时长时，停止向所述压电元件发送所述目标驱动信号。
可选的，所述触控显示面板包括触控区和包围所述触控区的边缘区，所述压电元件位于所述边缘区，且所述压电元件与所述边缘区内设置的触控走线不接触。
在本申请实施例中，通过对目标虚拟按键所对应的目标区域进行区域划分，当用户的手指触控到目标虚拟按键的不同区域时，可调用不同的驱动信号来驱动压电元件进行振动，进而使得压电元件带动触控显示面板进行振动，并且，当提供给压电元件的驱动信号不同时，手指与触控显示面板的表面之间的摩擦力也就不同，因此，手指可以清楚的感受到不同区域的摩擦力变化，当手指在触控显示面板的表面移动时，用户就能够感受到虚拟按键的边界，从而使得虚拟按键具有更真实的触觉反馈，提高用户的触控体验效 果。
参照图9，示出了本申请实施例的一种电子设备的结构示意图。
本申请实施例的电子设备包括触控显示面板901、至少一个压电元件902以及上述的虚拟按键的触觉反馈装置800；其中，虚拟按键的触觉反馈装置800分别与触控显示面板901和压电元件903连接。
当触控显示面板901为外挂式触控显示面板时，其包括显示面板和设置在显示面板出光侧的触控面板，此时，压电元件902位于触控面板靠近显示面板的一侧，或者，压电元件902位于触控面板远离显示面板的一侧；当触控显示面板901为内嵌式触控显示面板时，压电元件902位于触控显示面板901的出光侧。
具体的，虚拟按键的触觉反馈装置800包括处理器801和波形发生器802，处理器801内部可集成有驱动芯片，此时，处理器801分别触控显示面板901和波形发生器802连接，波形发生器802与压电元件902连接。
在本申请实施例中，通过对目标虚拟按键所对应的目标区域进行区域划分，当用户的手指触控到目标虚拟按键的不同区域时，可调用不同的驱动信号来驱动压电元件进行振动，进而使得压电元件带动触控显示面板进行振动，并且，当提供给压电元件的驱动信号不同时，手指与触控显示面板的表面之间的摩擦力也就不同，因此，手指可以清楚的感受到不同区域的摩擦力变化，当手指在触控显示面板的表面移动时，用户就能够感受到虚拟按键的边界，从而使得虚拟按键具有更真实的触觉反馈，提高用户的触控体验效果。
本文中所称的“一个实施例”、“实施例”或者“一个或者多个实施例”意味着，结合实施例描述的特定特征、结构或者特性包括在本申请的至少一个实施例中。此外，请注意，这里“在一个实施例中”的词语例子不一定全指同一个实施例。
在此处所提供的说明书中，说明了大量具体细节。然而，能够理解，本申请的实施例可以在没有这些具体细节的情况下被实践。在一些实例中，并未详细示出公知的方法、结构和技术，以便不模糊对本说明书的理解。
在权利要求中，不应将位于括号之间的任何参考符号构造成对权利要求 的限制。单词“包含”不排除存在未列在权利要求中的元件或步骤。位于元件之前的单词“一”或“一个”不排除存在多个这样的元件。本申请可以借助于包括有若干不同元件的硬件以及借助于适当编程的计算机来实现。在列举了若干装置的单元权利要求中，这些装置中的若干个可以是通过同一个硬件项来具体体现。单词第一、第二、以及第三等的使用不表示任何顺序。可将这些单词解释为名称。
最后应说明的是：以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围。

Claims (11)

  1. 一种虚拟按键的触觉反馈方法，其特征在于，应用于电子设备，所述电子设备包括触控显示面板和至少一个压电元件，所述方法包括：
    控制所述触控显示面板显示至少一个虚拟按键；
    获取所述触控显示面板检测到的触控位置；
    根据所述触控位置与目标虚拟按键所对应的目标区域中的各区域之间的位置关系，确定目标波形参数；所述目标虚拟按键为任意一个所述虚拟按键；
    根据所述目标波形参数生成目标驱动信号，并向所述压电元件发送所述目标驱动信号，以使所述压电元件带动所述触控显示面板进行振动；
    其中，所述目标区域包括按键内部区域、按键边界区域和按键外部区域，所述触控位置位于所述按键边界区域内时所生成的目标驱动信号，与所述触控位置位于所述按键内部区域内时所生成的目标驱动信号和所述触控位置位于所述按键外部区域内时所生成的目标驱动信号不同。
  2. 根据权利要求1所述的方法，其特征在于，所述根据所述触控位置与目标虚拟按键所对应的目标区域中的各区域之间的位置关系，确定目标波形参数的步骤，包括：
    当所述触控位置位于所述按键内部区域内时，根据所述目标区域中的各区域与波形参数的映射关系，查找所述按键内部区域对应的第一波形参数；
    当所述触控位置位于所述按键边界区域内时，根据所述目标区域中的各区域与波形参数的映射关系，查找所述按键边界区域对应的第二波形参数；
    当所述触控位置位于所述按键外部区域内时，根据所述目标区域中的各区域与波形参数的映射关系，查找所述按键外部区域对应的第三波形参数；
    其中，所述第一波形参数所生成的第一驱动信号、所述第二波形参数所生成的第二驱动信号以及所述第三波形参数所生成的第三驱动信号均不同。
  3. 根据权利要求1所述的方法，其特征在于，所述按键边界区域包括至少两个边界子区域；
    针对相邻的第一边界子区域和第二边界子区域，所述触控位置位于所述第一边界子区域内时所生成的目标驱动信号，与所述触控位置位于所述第二 边界子区域内时所生成的目标驱动信号不同。
  4. 根据权利要求1所述的方法，其特征在于，在所述根据所述目标波形参数生成目标驱动信号，并向所述压电元件发送所述目标驱动信号，以使所述压电元件带动所述触控显示面板进行振动的步骤之后，还包括：
    当所述触控位置被触控的时长超过预设时长时，停止向所述压电元件发送所述目标驱动信号。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，所述触控显示面板包括触控区和包围所述触控区的边缘区，所述压电元件位于所述边缘区，且所述压电元件与所述边缘区内设置的触控走线不接触。
  6. 一种虚拟按键的触觉反馈装置，其特征在于，应用于电子设备，所述电子设备包括触控显示面板和至少一个压电元件，所述装置包括处理器和波形发生器；
    所述处理器，被配置为控制所述触控显示面板显示至少一个虚拟按键；获取所述触控显示面板检测到的触控位置；以及根据所述触控位置与目标虚拟按键所对应的目标区域中的各区域之间的位置关系，确定目标波形参数；所述目标虚拟按键为任意一个所述虚拟按键；
    所述波形发生器，被配置为根据所述目标波形参数生成目标驱动信号，并向所述压电元件发送所述目标驱动信号，以使所述压电元件带动所述触控显示面板进行振动；
    其中，所述目标区域包括按键内部区域、按键边界区域和按键外部区域，所述触控位置位于所述按键边界区域内时所生成的目标驱动信号，与所述触控位置位于所述按键内部区域内时所生成的目标驱动信号和所述触控位置位于所述按键外部区域内时所生成的目标驱动信号不同。
  7. 根据权利要求6所述的装置，其特征在于，所述处理器具体被配置为：当所述触控位置位于所述按键内部区域内时，根据所述目标区域中的各区域与波形参数的映射关系，查找所述按键内部区域对应的第一波形参数；当所述触控位置位于所述按键边界区域内时，根据所述目标区域中的各区域与波形参数的映射关系，查找所述按键边界区域对应的第二波形参数；当所述触控位置位于所述按键外部区域内时，根据所述目标区域中的各区域与波 形参数的映射关系，查找所述按键外部区域对应的第三波形参数；
    其中，所述第一波形参数所生成的第一驱动信号、所述第二波形参数所生成的第二驱动信号以及所述第三波形参数所生成的第三驱动信号均不同。
  8. 根据权利要求6所述的装置，其特征在于，所述按键边界区域包括至少两个边界子区域；
    针对相邻的第一边界子区域和第二边界子区域，所述触控位置位于所述第一边界子区域内时所生成的目标驱动信号，与所述触控位置位于所述第二边界子区域内时所生成的目标驱动信号不同。
  9. 根据权利要求6所述的装置，其特征在于，所述波形发生器，还被配置为当所述触控位置被触控的时长超过预设时长时，停止向所述压电元件发送所述目标驱动信号。
  10. 根据权利要求6至9中任一项所述的装置，其特征在于，所述触控显示面板包括触控区和包围所述触控区的边缘区，所述压电元件位于所述边缘区，且所述压电元件与所述边缘区内设置的触控走线不接触。
  11. 一种电子设备，其特征在于，包括：触控显示面板、至少一个压电元件以及如权利要求6至10中任一项所述的虚拟按键的触觉反馈装置；
    其中，所述虚拟按键的触觉反馈装置分别与所述触控显示面板和所述压电元件连接。
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Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 12.01.2024)