Display apparatus, touch feedback method, and device

Abstract

A display apparatus, a touch feedback method, and a device, which relate to the technical field of surface tactile reproduction, and aim to realize touch feedback having a realistic tactile sensation. The display apparatus is configured with a control area. The display apparatus comprises a tactile feedback assembly. The tactile feedback assembly comprises a control unit and an actuating element, wherein the control unit is configured to generate a driving signal in response to a touch action generated in the control area; the driving signal is divided into a plurality of stages according to a time sequence, and there is a phase difference of greater than 0 degrees between phases of adjacent stages; the touch action comprises at least one of a touch action of touching the control area and a release action of a touch leaving the control area; and the actuating element is configured to generate vibration under the driving of the driving signal.

Description

Display device, touch feedback method and equipment Technical Field

[0001] The present disclosure relates to the technical field of surface tactile reproduction, and in particular to a display device, a touch feedback method and an apparatus. Background Art

[0002] Current display devices use actuators to drive the screen, touchpad, and other parts to vibrate, but the vibration feedback is weak and it is difficult to form effective feedback.

[0003] Overview

[0004] Based on the background technology, the present disclosure proposes a display device, a touch feedback method and an apparatus.

[0005] The present disclosure provides a display device, wherein the display device is configured with a control area, including: a tactile feedback component, wherein the tactile feedback component includes a control unit and an actuating element;

[0006] The control unit is configured to generate a driving signal in response to a touch action generated in the control area; wherein the driving signal is divided into a plurality of phases according to a time sequence, and a phase difference greater than 0 degree exists between phases of adjacent phases; wherein the touch action includes at least one of a touch action of touching the control area and a release action of leaving the control area;

[0007] The actuator is configured to generate vibration under the drive of the drive signal.

[0008] Exemplarily, the phase difference between the phases corresponding to the driving signals in adjacent stages is 180 degrees.

[0009] Exemplarily, the control unit is specifically configured to generate a first driving signal in response to the touch action, and generate a second driving signal in response to the release action;

[0010] The first driving signal and the second driving signal differ in at least one of the following: amplitude, frequency, the phase difference, and signal waveform.

[0011] Exemplarily, the first driving signal is divided into a first stage and a second stage according to time sequence, and the second driving signal is divided into a third stage and a fourth stage according to time sequence;

[0012] The duration of the first stage is different from the duration of the third stage, and / or the duration of the second stage is different from the duration of the fourth stage.

[0013] Exemplarily, the duration of each stage in the driving signal is a ratio of a preset number of cycles to the frequency of the driving signal; wherein the preset number of cycles is greater than or equal to 1.

[0014] Exemplarily, different phases in the driving signal correspond to the same or different durations.

[0015] Exemplarily, the driving signal causes the actuating element to vibrate at a frequency of 100 to 500 Hz.

[0016] Exemplarily, the driving signal includes at least one of a sine wave signal, a cosine wave signal, a triangle wave signal, and a square wave signal.

[0017] Exemplarily, the display device further includes a detection component, configured to respond to a touch signal generated in the control area and detect whether the control area generates the touch action based on a change in the touch pressure applied to the control area;

[0018] The control unit is specifically configured to generate the driving signal in response to the detection component detecting the touch action.

[0019] Exemplarily, the display device includes a display panel, and the control area includes virtual controls displayed in a display area of ​​the display panel;

[0020] And / or, the display device includes a touch panel, and the control area is located on the touch panel.

[0021] Exemplarily, the display device includes a display substrate, which includes a display area; wherein the actuating element is located on a side of the display substrate away from the display area; and / or the actuating element is located in the display substrate and arranged close to the display area.

[0022] Exemplarily, the display substrate is configured with a frame area adjacent to the display area, and the orthographic projection of the actuating element on the display substrate falls within the frame area to generate vibration in the frame area.

[0023] Exemplarily, the orthographic projection of the actuating element on the display substrate partially overlaps with the orthographic projection of the control area on the display substrate.

[0024] The present disclosure further provides a touch feedback method, which is applied to a display device, wherein the display device is configured with a control area, and the method includes:

[0025] In response to a touch action generated in the control area, a driving signal is generated, wherein the driving signal is divided into a plurality of phases according to a time sequence, wherein a phase difference greater than 0 degree exists between phases of adjacent phases; wherein the touch action includes at least one of a touch action of touching the control area and a release action of leaving the control area;

[0026] The driving signal is applied to an actuator disposed on the display device to cause the actuator to vibrate.

[0027] Exemplarily, generating a driving signal in response to a touch action generated in the control area includes:

[0028] acquiring a touch pressure applied to the control area in response to a touch signal generated by the control area;

[0029] Based on the change of the touch pressure, detecting whether the touch action occurs in the control area;

[0030] When the touch action is detected in the control area, the driving signal is generated.

[0031] Exemplarily, the change in touch pressure includes a change in a pressure value of the touch pressure and a loading rate of the touch pressure. Detecting whether the touch action occurs in the control area based on the change in touch pressure includes:

[0032] When the pressure value is greater than or equal to a first preset threshold, or the loading rate indicates that the received touch force is increasing, detecting that the control area generates the touch action;

[0033] When the pressure value is less than or equal to a second preset threshold value and the loading rate represents that the received touch force is decreasing, detecting that the control area generates the release action;

[0034] The second preset threshold is smaller than the first preset threshold.

[0035] An embodiment of the present disclosure further discloses an electronic device, including the above-mentioned display device; or, the electronic device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned touch feedback method when executed.

[0036] The above description is only an overview of the technical solution of the present disclosure. In order to more clearly understand the technical means of the present disclosure, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present disclosure more obvious and easy to understand, the specific implementation methods of the present disclosure are listed below.

[0037] BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the following is a brief introduction to the drawings required for the description of the embodiments or related technologies. Obviously, the drawings described below are some embodiments of the present disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without inventive efforts. It should be noted that the scales in the drawings are for illustration only and do not represent the actual scale.

[0039] FIG1 is a schematic diagram showing a physical button in the related art;

[0040] FIG2 shows a schematic diagram of a virtual key in the related art;

[0041] FIG3 shows a schematic structural diagram of a display device provided by an embodiment of the present disclosure;

[0042] FIG4 shows a schematic structural diagram of another display device provided by an embodiment of the present disclosure;

[0043] FIG5 is a schematic diagram showing the position of the actuating element in an embodiment of the present disclosure;

[0044] FIG6 is a schematic diagram showing the position of an actuating element in another embodiment of the present disclosure;

[0045] FIG7 shows a displacement response diagram of the actuator when the driving signal 1 acts on the actuator;

[0046] FIG8 shows a displacement response diagram of the actuator when the driving signal 2 acts on the actuator;

[0047] FIG9 is a schematic diagram showing a waveform of a driving signal in an embodiment of the present disclosure;

[0048] FIG10 shows a waveform diagram of another driving signal in an embodiment of the present disclosure;

[0049] FIG11 shows a flowchart of the steps of the tactile feedback method provided by an embodiment of the present disclosure;

[0050] Explanation of reference numerals: 100, control area; 200, tactile feedback component; 210, control unit; 220, actuating element; 300, detection component; 400, display substrate; 401, display area; 402, frame area.

[0051] Detailed description

[0052] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present disclosure without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0053] As shown in Figure 1, most electronic products, such as mobile terminals and tablets, have a large number of physical buttons. These physical buttons often require complex mechanical structures to achieve the desired effect. This not only increases the difficulty of product design and manufacturing, but also squeezes battery space, reducing the product's battery life. To address this issue, a related technology adds a tactile feedback module to the display device, replacing physical buttons with virtual buttons, as shown in Figure 2. This reduces the problem of mechanical structure squeezing battery space and resulting in lower battery life.

[0054] However, the tactile sensation of current virtual buttons is achieved by driving the screen or touchpad to vibrate at a low frequency through an actuator, which can only serve as a prompt, and its prompting effect is relatively weak.

[0055] In view of this, the embodiments of the present disclosure provide a display device, a touch feedback method and an apparatus. When the touch component receives a touch operation on the display screen or touch pad, a corresponding driving signal is generated in the control unit according to the touch operation, and the driving signal drives the actuator to vibrate, and the actuator drives the display area of ​​the display device to vibrate, so that the user receives relatively strong vibration feedback, which can clearly prompt the user that the key operation is successful.

[0056] 3 , which shows a schematic structural diagram of a display device provided by an embodiment of the present disclosure. As shown in FIG3 , the display device is configured with a control area 100 for implementing key touch control. The display device 100 specifically includes:

[0057] A touch feedback assembly 200 , comprising a control unit 210 and an actuator 220 ;

[0058] The control unit 210 is configured to generate a driving signal in response to a touch action generated on the control area 100; wherein the driving signal is divided into a plurality of phases according to a time sequence, and a phase difference greater than 0 degree exists between phases of adjacent phases; wherein the touch action includes at least one of a touch action of touching the control area 100 and a release action of leaving the control area 100;

[0059] The actuator 220 is configured to generate vibration under the driving of the driving signal.

[0060] In the embodiment of the present disclosure, the control area 100 may be located in a portion of the display area of ​​the display device.

[0061] Like the fingerprint recognition area of ​​the display area, the control area 100 can also be an area on the touchpad. When the control area 100 is located in the display area, the control area 100 can be the area where the virtual control is located, or the area where the physical control is located. For example, as shown in the right figure of Figure 1 and the right figure of Figure 2, the control area can be the area where the numbers 1, 2, etc. are located, or the area where the letters A, S, etc. are located; the control area 100 can also be located in a partial area of ​​a touchpad separated from the display screen, or it can be a touchpad, such as the screen of a tablet computer, a smart mobile terminal, and the touchpad of a smart display screen. When the control area 100 is located on the touchpad, for example, as shown in the left figure of Figure 1 and the left figure of Figure 2, the control area can be an area where the user can perform touch operations to control the virtual controls in the display area. Among them, the display area of ​​the display device can be composed of an LCD (Liquid Crystal Display) or an OLED (Organic Light-Emitting Diode).

[0062] Among them, tactile control of the control area 100 can be implemented based on pressure detection or capacitance detection. For example, when a pressing operation on the control area 100 is received, the specific position of the control area 100 is determined, thereby realizing tactile control of the virtual button.

[0063] It can be understood that the touch process can be divided into a pressing and releasing process, and the touch action generated by the control area 100 can also be divided into two actions, namely the touch action of touching the control area 100, and the release action of touching the control area 100. In this way, when realizing tactile control, the vibration of the actuating element 220 can be realized when the control area 100 generates an action of touching the control area 100, or the vibration of the actuating element 220 can be realized when the release action of leaving the control area 100 is generated after the touch, so that the user can receive tactile feedback when touching the control area 100; or the vibration of the actuating element 220 can be realized respectively under the action of touching the control area 100 and the action of releasing the control area 100 after the touch, so that the tactile feedback felt by the user can be closer to the pressing operation of a real button.

[0064] The driving signal of the control unit 210 can be pre-set according to the touch action, and can specifically be a sine wave signal, a cosine wave signal, a triangle wave signal, etc. The driving signal is divided into multiple stages according to the time sequence, and the duration of each stage can be equal or unequal. There is a phase difference greater than 0 degrees between the phases of two adjacent stages. By superimposing two signals with different phase differences, the tactile feedback effect felt by the user is enhanced.

[0065] In a specific implementation, if the control unit 210 is configured to generate a driving signal only in response to a touch action of touching the control area 100 generated by the control area 100, or to generate a driving signal only in response to a release action of leaving the control area 100 after a touch generated in the control area 100, then only one driving signal can be set; if the control unit 210 is configured to generate a driving signal in response to a touch action of touching the control area 100 generated by the control area 100, and to generate a driving signal in response to a release action of leaving the control area 100 after a touch generated in the control area 100, then the two driving signals can be the same or different.

[0066] The actuator 220 can be a material with an inverse piezoelectric effect, which can convert electrical signals into mechanical vibrations through the characteristics of piezoelectric materials. The inverse piezoelectric effect is specifically: when an electric field is applied in the polarization direction of the dielectric, these dielectrics will produce mechanical deformation or mechanical pressure in a certain direction. When the external electric field is removed, these deformations or stresses also disappear. The thickness of the actuator 220 can be 2-3mm. It can be a whole piece or a collection of multiple actuators 220. The number of multiple actuators 220 can be determined according to the number of virtual keys. For example, if there are three virtual keys, three actuators 220 are set accordingly.

[0067] The actuating element 220 can be located on the back of the control area 100, and can drive the control area 100 to vibrate by vibrating on the back of the control area 100; it can also be located at the border of the control area 100, or at the border of the display area of ​​the display device, and can drive the control area 100 to vibrate by vibrating at the border. The actuating element 220 can drive the control area 100 to vibrate as a whole, or it can drive a local position of the control area 100 to vibrate, which is not specifically shown in the present disclosure. For example, when the actuating element 220 is set as a whole on the back of the control area 100 or around the border of the control area 100, it drives the control area 100 to vibrate as a whole; when the actuating element 220 is set in blocks on the back of the control area 100 or around the border of the control area 100, it drives a local position of the control area 100 to vibrate.

[0068] In a specific implementation, when the user touches the control area 100, the control unit 210 generates a driving signal corresponding to the touch action in response to the touch action generated by the control area 100, and transmits the driving signal to the actuator element 220. The actuator element 220 vibrates under the drive of the driving signal, thereby driving the control area 100 to vibrate, so that the user has a real tactile feeling when pressing or releasing the virtual key.

[0069] In the embodiment of the present disclosure, when a touch action of touching the control area 100 is generated in the control area 100, or a release action of leaving the control area 100 after touching is generated, the control unit 210 generates a driving signal, and the vibration of the actuator element 220 is realized through the driving signal, and then the touch feedback is realized through the vibration of the actuator element 220; wherein, since the phases of the driving signal in adjacent timing stages have a certain phase difference, the two different phases can be superimposed to increase the amplitude of the overall signal, thereby increasing the vibration intensity of the actuator element 220, so that the tactile feedback felt by the user is more obvious, thereby improving the user's tactile feeling.

[0070] In a disclosed embodiment, referring to FIG4 , FIG4 shows a schematic structural diagram of a display device provided by another embodiment of the present disclosure. As shown in FIG4 , the display device further includes a detection component 300, and the detection component 300 is configured to respond to a touch signal generated in the control area 100, and detect whether the control area 100 generates the touch action based on changes in the touch pressure applied to the control area 100; and then the control unit 210 is specifically configured to generate the drive signal in response to the detection component 300 detecting the touch action.

[0071] The detection component 300 is in communication with the control area 100. When a user touches the control area 100, the control area 100 transmits a touch signal to the detection component 300. Based on the received touch signal, the detection component 300 determines the change in touch pressure on the control area 100 and further determines whether a touch action has occurred on the control area 100. If a touch action is detected on the control area 100, the control unit 210 generates a drive signal in response to the detected touch action.

[0072] Specifically, the detection component 300 can determine whether the control area 100 generates a touch action based on the size of the pressure value applied to the control area 100, or it can determine the touched state of the target object based on the loading rate of the pressure value, or it can determine the touched state of the target object based on the size of the pressure value and the loading rate of the pressure value.

[0073] Among them, in the case where the detection component 300 uses the pressure value for judgment, whether it is a touch action of the touch control area 100 is determined based on whether the pressure value reaches a certain pressure value. Since there must be a release process after touching the virtual control, it is determined whether the pressure value decreases to below a certain pressure value to determine whether it is a release action after the touch control area 100.

[0074] In the case where the detection component 300 uses the loading rate of the pressure value to make a judgment, the loading rate can characterize whether the control area 100 is in a scene where the pressure increases or in a scene where the pressure decreases. The scene where the pressure increases corresponds to the touch action of the touch control area 100, and the scene where the pressure decreases corresponds to the release action after the touch control area 100.

[0075] In the case where the detection component 300 makes a judgment based on the pressure value and the loading rate of the pressure value, when it is detected that the pressure value is greater than or equal to the first preset threshold value and the loading rate represents that the touch pressure on the control area 100 increases, the touch action is determined to be a touch action of touching the control area 100; when it is detected that the pressure value is less than or equal to the second preset threshold value and the loading rate represents that the touch pressure on the control area 100 decreases, the touch action is determined to be a release action after touching the control area 100.

[0076] It is understandable that if the detection component 300 only uses the loading rate of the pressure value of the control area 100 to determine the touch action, it is difficult to determine whether the user accidentally touches the virtual control. If the user continues to touch the virtual control, the touch force may also change. Only determining whether it is a release action based on the change in touch force may lead to misjudgment. Then, using the pressure value of the control area 100 and the loading rate of the pressure value can avoid some misjudgments and improve the accuracy of touch feedback.

[0077] Specifically, the step of detecting whether a touch action is generated in the control area 100 based on the change of the touch pressure of the control area 100 can refer to the detection process described in the embodiment of the touch feedback method, and will not be repeated here.

[0078] In specific implementation, in order to enable the user to feel the real touch during the pressing process, the detection component 300 needs to provide timely feedback when receiving the touch signal of the control area 100. When the control area 100 transmits the touch signal to the detection component 300, it is immediately determined that the control area 100 generates a touch action, and then the signal is transmitted to the control unit 210, so that the control unit 210 can immediately output the driving signal to the actuator 220, so that the user can feel the corresponding vibration when pressing, thereby improving the touch feedback effect.

[0079] In a disclosed embodiment, the display device includes a display panel, and the control area 100 includes virtual controls displayed in the display area of ​​the display panel; and / or, the display device includes a touchpad, and the control area 100 is located on the touchpad.

[0080] Where the display device includes a display panel, the control area 100 is the area within the display area of ​​the display panel where the virtual controls are located. That is, the area where each virtual control is located is the control area 100, so as to facilitate accurate detection of touch operations on the control area 100. Where the display device includes a touchpad, the control area 100 can be a local area within the touchpad or the entire area within the touchpad.

[0081] In one example, the display device includes a display substrate 400 , which includes a display area 401 . The actuating element 220 can be located on a side of the display substrate 400 away from the display area 401 , or can be located within the display substrate 400 and close to the display area 401 .

[0082] In this embodiment, in order to enable the actuator element 220 to drive the control area 100 to vibrate, the actuator element 220 can be arranged on the back of the display area 401 of the display device, so that when the actuator element 220 vibrates, the vibration is transmitted from the back to the display area 401, thereby realizing the vibration of the control area 100; the actuator element 220 can also be arranged in the border area 402 of the display area 401 of the display substrate 400, so that when the actuator element 220 vibrates, the vibration is transmitted from the border area 402 to the display area 401.

[0083] Specifically, when the actuating element 220 is located on the side of the display substrate 400 away from the display area 401, referring to Figure 5, Figure 5 shows a schematic diagram of the position of the actuating element 220 in an embodiment of the present disclosure. As shown in Figure 5, the orthographic projection of the actuating element 220 on the display substrate 400 partially overlaps with the orthographic projection of the control area 100 on the display substrate 400.

[0084] In a specific implementation, the actuating element 220 may be covered by a local area of ​​the control area 100, and the vibration of the actuating element 220 at the local position can provide vibration feedback to the user, thereby saving the space occupied by the actuating element 220; the actuating element 220 may also cover any position of the control area 100, and the actuating element 220 can transmit the vibration to any position of the control area 100, so that the tactile feedback felt by the user is more obvious.

[0085] In a specific implementation, the actuating element 220 is located on one side of the display substrate 400, and the display area of ​​the control area 100 is located on the other side of the display substrate 400. When the actuating element 220 vibrates, the vibration is transmitted to the display area 401 through the display substrate 400, causing the control area 100 in the display area 401 to vibrate, thereby allowing the user to feel a touch similar to a real button when pressing.

[0086] When the actuating element 220 is located in the display substrate 400 and is arranged close to the display area 401, referring to Figure 6, Figure 6 shows a schematic diagram of the position of the actuating element 220 in another embodiment of the present disclosure. As shown in Figure 6, the display substrate 400 is configured with a border area 402 adjacent to the display area 401, and the orthographic projection of the actuating element 220 on the display substrate 400 falls into the border area 402 to generate vibration in the border area 402.

[0087] In the embodiment of the present disclosure, the border area 402 is located around the display area 401, and the actuating element 220 is located in the border area 402. When the actuating element 220 vibrates, the vibration is transmitted to the border area 402, and then transmitted to the control area 100, causing the control area 100 to vibrate, thereby allowing the user to feel a touch similar to a real button when pressing.

[0088] In one disclosed embodiment, a driving signal is used to vibrate the actuator 220, and thus the display assembly 100. To ensure that the user's touch operation has a realistic tactile sensation, the waveform and frequency of the driving signal must be controlled to generate an appropriate driving signal. The driving signal for tactile feedback may include at least one of a sine wave signal, a cosine wave signal, a triangle wave signal, and a square wave signal.

[0089] For example, the drive signal can be a sine wave signal, or a cosine wave signal, or a triangular wave signal, or a square wave signal; the drive signal can also be a combination of a sine wave signal and a cosine wave signal, or a combination of a sine wave signal and a triangular wave signal, or a combination of a square wave signal and a triangular wave signal, etc.

[0090] Among them, the vibration generated by the sine wave signal is more consistent with the actual situation, while the sound effect of the vibration generated by the square wave signal is more obvious and can serve as a clear prompt.

[0091] Taking a sinusoidal signal as an example, since one half cycle of the sinusoidal signal is a positive voltage and the other half cycle is a negative voltage, the actuator 220 generates an outward force under the action of the positive voltage and an inward force under the action of the negative voltage. Under the action of the sinusoidal signal, the actuator first expands outward and then contracts inward, thereby causing the display component 100 to generate an outward force and then an inward force, thereby simulating the tactile feeling when pressing or releasing a key.

[0092] In a disclosed embodiment, the phase difference between the phases corresponding to the driving signal in adjacent stages is 180 degrees.

[0093] Among them, the phase of the driving signal refers to the position of the signal wave in its cycle at a specific moment. The phase difference between adjacent stages is 180 degrees, that is, the phases of the signals in adjacent stages are opposite. By superimposing two signals with opposite phases, the signal strength is increased, thereby increasing the vibration energy of the actuator 220, making the tactile feedback effect received by the user more obvious.

[0094] 7 and 8 , FIG7 shows a displacement response diagram of the actuator 220 when the driving signal 1 (A0=100, f0=393 Hz, n=1) is applied to the actuator 220, and FIG8 shows a displacement response diagram of the actuator 220 when the driving signal 2 (A0=100, f0=393 Hz, m=n=1) is applied to the actuator 220, where A0 is the amplitude, f0 is the frequency, and m and n are the preset number of cycles. It can be seen from FIG7 and FIG8 that when the phases of two adjacent phases of the driving signal are the same, the peak-to-peak value of the displacement of the actuator 220 is 0.0016 mm when the driving signal is applied to the actuator 220, and when the phases of the two adjacent phases of the driving signal are opposite, the peak-to-peak value of the displacement of the actuator 220 is 0.0024 mm when the driving signal is applied to the actuator 220. It can be determined that when the phases of the two adjacent phases of the driving signal are opposite, the signal strength can be increased by superposition, thereby making the vibration of the actuator 220 more obvious, thereby enhancing the vibration sense felt by the user.

[0095] In a disclosed embodiment, in order to achieve the authenticity of the key touch, the control area 100 needs to have a relatively obvious vibration, so that the user can have a relatively obvious tactile sensation when pressing or releasing the key, so that the vibration frequency of the actuating element 220 can induce the control area 100 to resonate. Then, the vibration frequency of the actuating element 220 is preferably the resonant frequency of the control area 100, and the frequency of the driving signal is also correspondingly preferably the resonant frequency of the control area 100.

[0096] It can be understood that if the frequency of the driving signal is too high or too low, the display component will vibrate too fast or too slow, thereby causing the virtual key to lose its real touch. Therefore, the range of the driving signal is limited to between 100 and 500 Hz. Within this range, the vibration generated by the actuator 220 through the driving signal is similar to the touch of a real key.

[0097] In a disclosed embodiment, the control unit 210 is specifically configured to generate a first drive signal in response to the touch action and to generate a second drive signal in response to the release action; wherein, the first drive signal and the second drive signal differ in at least one of the following: amplitude, frequency, the phase difference, and signal waveform.

[0098] It is understandable that the user experiences a tactile sensation when a key is pressed and released. For example, when a key is pressed, the user can feel the resistance of the key and the supporting force after pressing it to a certain position; when the key is released, the user can feel the upward supporting force of the key and the process of the supporting force disappearing after reaching a certain position. In order to achieve a realistic tactile sensation for the virtual key, it is necessary to simulate the tactile sensation when the key is pressed and the tactile sensation when the key is released. Then, when the user touches a control in the control area 100, the control unit 210 generates a first drive signal corresponding to the user's touch action; when the user releases a control in the control area 100, the control unit 210 generates a second drive signal corresponding to the user's release action.

[0099] Specifically, the first drive signal and the second drive signal are set to be different. In this way, the tactile sensation felt by the user during a touch action is different from the tactile sensation felt by the user during a release action, which is closer to the tactile sensation of a real keypress process. The difference between the first drive signal and the second drive signal can be that the waveform of the first drive signal is different from the waveform of the second drive signal, the phase difference between two adjacent phases of the first drive signal is different from the phase difference between two adjacent phases of the second drive signal, the frequency of the first drive signal and the second drive signal is different, or both the waveform and frequency of the first drive signal and the second drive signal are different.

[0100] For example, when the waveforms of the first drive signal and the second drive signal are different, when the first drive signal is a sine wave signal, the second drive signal is a cosine wave signal; when the first drive signal is a triangle wave signal, the second drive signal is a square wave signal.

[0101] When the phase difference between two adjacent phases of the first driving signal is different from the phase difference between two adjacent phases of the second driving signal, the phase difference between two adjacent phases of the first driving signal is 180 degrees, while the phase difference between two adjacent phases of the second driving signal is 90 degrees.

[0102] In the case where the frequencies of the first driving signal and the second driving signal are different, the frequency of the first driving signal may be f1, and the frequency of the second driving signal may be f2 which is different from f1;

[0103] In the case that the frequencies and waveforms of the first driving signal and the second driving signal are different, the first driving signal may be a sine waveform with a frequency of f1, and the second driving signal may be a triangular waveform with a frequency of f2.

[0104] In the case where the amplitudes of the first driving signal and the second driving signal are different, the frequency of the first driving signal may be A1, and the amplitude of the second driving signal may be A2 which is different from A1.

[0105] When the frequency and phase difference of the first driving signal and the second driving signal are different, the first driving signal is a signal with a frequency of f1 and a phase difference of 180 degrees between two adjacent stages, and the second driving signal is a signal with a frequency of f2 and a phase difference of 90 degrees between two adjacent stages.

[0106] The first driving signal is divided into a first stage and a second stage according to time sequence, and the second driving signal is divided into a third stage and a fourth stage according to time sequence; wherein the duration of the first stage is different from the duration of the third stage, and / or the duration of the second stage is different from the duration of the fourth stage.

[0107] In this embodiment, both the first and second drive signals consist of two phases. The superposition of these two phases makes the vibration of actuator 220 more pronounced, enhancing the tactile feedback effect. In a specific implementation, when a user touches control area 100, the output first drive signal is divided into two phases, meaning its phase varies over time. Similarly, when the user releases control area 100, the output second drive signal is divided into two phases, meaning its phase also varies over time.

[0108] The duration of each phase of the first driving signal and the duration of each phase of the second driving signal may be the same or different.

[0109] In one embodiment, the duration of the first stage is the same as the duration of the third stage, while the duration of the second stage is different from the duration of the fourth stage. In this case, for example, the duration of the first stage and the duration of the third stage are both 0.005 seconds, while the duration of the second stage is 0.005 seconds and the duration of the fourth stage is 0.003 seconds.

[0110] In another embodiment, the duration of the first stage is different from the duration of the third stage, while the duration of the second stage is the same as the duration of the fourth stage. In this case, for example, the duration of the first stage is 0.007s, the duration of the third stage is 0.005s, and the duration of the second stage and the duration of the fourth stage are both 0.004s.

[0111] In another embodiment, the duration of the first stage is different from the duration of the third stage, and the duration of the second stage is also different from the duration of the fourth stage. In this case, for example, the duration of the first stage is 0.005s, the duration of the third stage is 0.006s, the duration of the second stage is 0.005s, and the duration of the fourth stage is 0.004s.

[0112] This embodiment sets the duration of the first stage and the duration of the third stage to be different, and / or sets the duration of the second stage and the duration of the fourth stage to be different, so that the user can feel touch feedback of different durations when touching the control area 100 and releasing the control area 100, which helps to make the touch feedback felt by the user close to the real touch.

[0113] In one embodiment, the duration of each phase of the drive signal is determined based on the preset number of cycles of the drive signal and the frequency of the drive signal, and can be specifically expressed as the ratio of the preset number of cycles of each phase to the frequency of the drive signal. Taking the first drive signal as an example, the duration Δt1 of the first phase can be expressed as Δt1 = n / f0, and the duration Δt2 of the second phase can be expressed as Δt2 = m / f0; where n is the preset number of cycles of the first phase, m is the preset number of cycles of the second phase, and f0 is the frequency of the first drive signal. Both m and n are positive integers greater than 1, and m and n may be equal or unequal.

[0114] Different phases in the driving signal correspond to the same or different durations. When the durations of different phases are different, the tactile sensation of the vibration can be fine-tuned. For example, when the driving signal is divided into a first phase and a second phase, and the duration of the first phase is longer, enhanced vibration can be felt for a longer period of time after the touch starts, thereby clearly feeling the tactile feedback of the touch action.

[0115] When the duration of the second stage is longer, the enhanced vibration can be felt within a short time after the touch starts, which can be applied to the tactile feedback corresponding to the release action, allowing the user to experience the tactile feedback before the release starts.

[0116] The duration of the first driving signal and the duration of the second driving signal can be determined according to the actual pressing and releasing process of the key operated by the user.

[0117] In a specific implementation, the duration of the first drive signal can be set to the duration of the user touching the control area 100, such as the duration from the user keeping touching the control area 100 until the user starts to release the control area 100; the duration of the second drive signal can be set to the duration from the user releasing the control area 100 to the disappearance of the user's action on the control area 100; or the duration of the first drive signal and the duration of the second drive signal can be set to fixed values, such as the duration of the first drive signal is set to 0.005s, and the duration of the second drive signal is set to 0.005s.

[0118] In the embodiment of the present disclosure, a first drive signal is generated when the user touches the control area 100, and a second drive signal is generated when the user releases the control area 100. When the user touches the control area 100, the touch duration is longer than the release duration. The duration of the first drive signal can be set to be greater than the duration of the second drive signal, so that the pressing and releasing process of the virtual key is more similar to the pressing and releasing process of the real key, further increasing the authenticity of the tactile feeling during the operation of the virtual key.

[0119] In the embodiment of the present disclosure, the touch feedback process of the display device is specifically as follows: the detection component 300 detects the change in the touch pressure applied to the control area 100. When the pressure value applied to the control area 100 is greater than or equal to the first preset pressure threshold and the touch pressure gradually increases, the touch action generated by the control area 100 is determined to be a touch action of touching the control area 100. At this time, the control unit 210 generates a first drive signal in response to the action of touching the control area 100 generated by the control area 100, and transmits the first drive signal to the actuator element 220, such as a piezoelectric piece. Then, the actuator element 220 vibrates under the drive of the first drive signal. Since the actuator element 220 is arranged close to the control area 100, such as on the back of the display area 401, or located in the frame area 402 of the display substrate 400, or on the touch pad of the display device, it can transmit the vibration to the control area 100, so that the control area 100 vibrates accordingly, allowing the user to feel the tactile sensation of pressing a real button.

[0120] Then, when the user releases the control area 100, the detection component 300 continuously detects the change in the touch pressure applied to the control area 100. When the pressure value applied to the control area 100 is less than or equal to the first pressure threshold and the touch pressure gradually decreases, it is determined that the control area 100 has generated a release action after touching the control area 100. At this time, the control unit 210 generates a second drive signal in response to the release action generated by the control area 100, and transmits the processed second drive signal to the actuator element 220. Thereafter, the actuator element 220 vibrates under the drive of the second drive signal. Since the actuator element 220 is arranged close to the control area 100, such as being located on the back of the display area 401, or being located in the frame area 402 of the display substrate 400, or being located on the touch pad of the display device, it can transmit the vibration to the control area 100, so that the control area 100 vibrates accordingly, allowing the user to feel the tactile sensation of releasing a real key.

[0121] The display device provided by the embodiment of the present disclosure determines whether the control area 100 generates a touch action by detecting the touch pressure of the control area 100 by the detection component 300. When it is determined that a touch action has occurred, the control unit 210 generates a corresponding driving signal according to the touch action, and transmits the driving signal to the actuator element 220, so that the actuator element 220 vibrates under the drive of the driving signal. Since the actuator element 220 is located close to the control area 100, the vibration can be transmitted to the control area 100, so that the user can feel the touch feedback; and since the phase difference between the two adjacent stages in the driving signal is opposite, the superposition of the driving signals of the two stages can enhance the vibration of the actuator element 220, thereby improving the touch feedback effect.

[0122] The touch feedback process of the display device is described in detail below with reference to specific scenarios:

[0123] Scenario 1: The actuator is a piezoelectric plate, which is covered by the local area where the virtual keyboard is located in the touch screen. The area where each virtual key in the virtual keyboard is located is the control area. When the user intends to use the virtual keyboard to type text or symbols, the detection component detects whether the pressure value of the touch force on the control area is greater than the preset threshold F0, and detects the change in the touch force on the key. When it is determined that the pressure value is greater than the preset threshold F0 and the touch force increases, it is determined to be a touch action on the touch control area. At this time, the control unit generates a first drive signal. The waveform of the first drive signal is shown in Figure 9. The drive signal Q(t) consists of a sine wave signal Q1 and a cosine wave signal Q2. The duration of the sine wave signal Q1 is Δt1=n / f0; the duration of the cosine wave signal Q2 is: Δt2=m / f0. The durations of Q1 and Q2 are equal. The specific function expression (1) is:

[0124] The control unit then transmits the first drive signal to the piezoelectric sheet, which vibrates and produces sound according to the drive signal. Since the piezoelectric sheet is located in the local area where the virtual keyboard is located, the vibration of the piezoelectric sheet can be transmitted to the screen position. When the user presses the virtual key, he will feel the vibration and hear the sound of pressing the key, allowing the user to feel the real touch of pressing the key.

[0125] When the user releases the key, that is, the user's finger leaves the position of the virtual key, at this time, the detection component detects that the pressure value of the key is less than or equal to F1, and the touch force received by the key becomes smaller, which means that the control area has a release action after the touch, and then the control unit generates a second drive signal. The waveform of the second drive signal is shown in Figure 10. The second drive signal Q(t) consists of a triangular wave signal Q1 and a triangular wave signal Q2 with a phase opposite to Q1. The duration of Q1 and Q2 is equal; the function expression (2) of the triangular wave signal is:

[0126] Wherein, m and n are both positive integers.

[0127] Then, the second driving signal is transmitted to the piezoelectric sheet. The piezoelectric sheet generates vibration and sound according to the second driving signal and transmits the vibration to the screen position. When the user releases the key, the user can also feel the vibration and hear the sound of releasing the key, allowing the user to feel the real touch of releasing the key.

[0128] Scenario 2: The actuator is a piezoelectric piece, which is only provided at the bottom of the portable personal computer. The control area is located on the touchpad, and the user can control the virtual buttons in the display area by operating on the touchpad. The detection component detects whether the pressure value of the touch force on the control area is greater than the preset threshold value F0, and detects the change in the touch force on the control area. When it is determined that the pressure value is greater than the preset threshold value F0 and the touch force increases, it is determined that the control area has generated a touch action of touching the control area. At this time, the control unit generates a first drive signal and transmits the first drive signal to the piezoelectric piece. The piezoelectric piece generates vibration and sound effects according to the first drive signal, and transmits the vibration to the touchpad. When the user presses the button, he will feel the vibration and hear the sound of pressing the button, so that the user can feel the real touch of pressing the button.

[0129] When the user releases the button, that is, the user's finger leaves the touchpad, at this time, the touch component detects that the pressure value of the button is less than or equal to F1, and the touch force received by the button becomes smaller, which means that the control area has a release action after the touch, and the control unit generates a second drive signal and transmits the second drive signal to the piezoelectric piece. The piezoelectric piece generates vibration and sound according to the second drive signal and transmits the vibration to the screen position. When the user releases the button, he can also feel the vibration and hear the sound of releasing the button, so that the user can feel the real touch of releasing the button.

[0130] The present disclosure also provides a touch feedback method, which is applied to the display device described in any of the above embodiments of the present disclosure, wherein the display device is provided with a control area. Referring to FIG. 11 , FIG. 11 shows a flowchart of the touch feedback method provided in the present disclosure embodiment. As shown in FIG. 11 , the method specifically includes:

[0131] S501 , generating a driving signal in response to a touch action generated in the control area, wherein the driving signal is divided into a plurality of stages according to a time sequence, wherein there is a phase difference greater than 0 degree between the phases of adjacent stages.

[0132] The touch action includes at least one of a touch action of touching the control area and a release action of leaving the control area. The touch action represents a user's operation on a virtual control in the control area, and can be determined by detecting a change in touch pressure applied to the control area, or by detecting a change in capacitance of the control area. For example, the user's operation on the virtual control includes touching and releasing. During the touch and release process, the pressure on the control area inevitably changes, and the touch action generated can be determined based on the pressure change in the control area.

[0133] In the embodiment of the present disclosure, the control area can specifically be the area where the virtual controls are located in the touch display screen, or it can be the display area of ​​the touch display screen, or it can be a touchpad separated from the display screen, for example, such as the screen of a mobile smart terminal, the touchpad of a portable personal computer, etc.

[0134] The driving signal is divided into multiple stages according to the timing. The duration of each stage of the driving signal can be the same or different. There is a certain phase difference between the phases of two adjacent stages. In this way, the signal of the next stage in the two adjacent stages in the timing can improve the signal strength. For example, the driving signal can be divided into two stages according to the timing. The phase difference between the signal of the first stage and the signal of the second stage is 30 degrees, 60 degrees, or 180 degrees. Among them, in order to make the touch feedback closer to the tactile feeling of the real button, the driving signal is set to two consecutive signal stages with opposite phases. The superposition of the signals of the two stages with opposite phases can make the vibration of the actuator more obvious, and thus the touch feedback felt by the user can be more obvious.

[0135] In a specific implementation, the drive signal corresponding to the touch action can be pre-set, so when a touch action occurs in the control area, the corresponding drive signal can be directly generated. The drive signal corresponding to the touch action in the touch control area and the drive signal corresponding to the release action when the touch leaves the control area can be the same or different. The drive signal can be a sine wave signal, a cosine wave signal, a triangle wave signal, a square wave signal, etc. A sine wave signal is preferably used as the drive signal, as the vibration generated by the sine wave signal is closer to the actual touch of the key. At the same time, the duration and phase of the drive signal are determined according to actual requirements.

[0136] S502: Apply the driving signal to an actuator configured on the display device to cause the actuator to vibrate.

[0137] Among them, the actuator element is a piezoelectric material. Due to the characteristics of the piezoelectric material, the actuator element will generate vibration according to the driving signal. The vibration is transmitted to the control area position, allowing the user to feel touch feedback.

[0138] The embodiment of the present disclosure generates a driving signal in response to a touch action generated in the control area. Since the driving signal is divided into multiple stages according to a timing sequence, there is a phase difference greater than 0 degree between the phases of adjacent stages. The driving signals of two stages with different phases can be superimposed on the actuator element, so that the vibration of the actuator element is enhanced, and the vibration transmitted to the control area is enhanced, and the user can feel obvious touch feedback.

[0139] In a disclosed embodiment, different drive signals are provided for different touch actions. Specifically, a first drive signal is generated in response to the touch action of touching the control area; and a second drive signal is generated in response to the release action of the touch leaving the control area; wherein, there is at least one of the following differences between the first drive signal and the second drive signal: amplitude, frequency, the phase difference, and signal waveform.

[0140] Among them, the difference between the first drive signal and the second drive signal can enable the user to clearly distinguish the difference between the touch action and the release action, so that the touch feedback effect of the virtual control is closer to the real situation. The amplitude, frequency, phase difference or signal waveform between the first drive signal and the second drive signal can be set to be different.

[0141] For details, please refer to the difference between the first driving signal and the second driving signal described in the embodiment of the display device, which will not be elaborated here.

[0142] Among them, the method for generating the driving signal can specifically be: generating the driving signal according to the objective function; wherein, the objective function includes any one of a sine wave function, a square wave function and a triangular wave function, and the objective function is used to indicate the phase corresponding to different stages, so that the driving signal has the phase difference in adjacent stages.

[0143] Wherein, when the target function is a sine wave function, a sine wave signal can be generated, when the target function is a square wave function, a square wave signal can be generated, and when the target function is a triangular wave function, a triangular wave signal can be generated. The target function can be a function represented by segments, and the interval range of each segment of the function is determined according to the divided time sequence. The functions of two adjacent stages can be set to be different so that the driving signal has a phase difference greater than 0 degrees in the two adjacent stages.

[0144] For example, the objective function can be a sine wave function as shown in the above expression (1), wherein the function expression of the first stage of expression (1) is different from the function expression of the second stage, thereby achieving a phase difference between the phase of the first stage and the phase of the second stage; or it can be a triangular wave function as shown in the above expression (2), wherein the function expressions of different stages of expression (2) are different, thereby achieving a phase difference between two adjacent stages.

[0145] In some embodiments, the specific process of generating a driving signal in response to a touch action generated in a control area is as follows: first, in response to the touch signal generated in the control area, the touch pressure applied to the control area is obtained; then, based on the change in the touch pressure, whether the control area generates the touch action is detected; thereafter, the driving signal is generated at the moment when the touch action is detected in the control area.

[0146] Among them, the touch signal generated by the control area can be a signal of pressure changes generated by the user touching the control area, or it can be a signal of capacitance changes generated by the user touching the control area of ​​the screen. The present disclosure does not show it in detail. When a contact signal is generated in the control area, the touch pressure exerted on the control area is detected. The detection process can continue until the touch signal generated by the control area disappears. If the user's finger leaves the control area, the user's touch action in the control area can be continuously detected through the continuous detection process, so as to facilitate the timely generation of drive signals and provide timely touch feedback to the user.

[0147] Specifically, based on the change of touch pressure, detecting whether a touch action is generated in the control area can be performed by detecting whether a touch action is generated in the control area based on the specific pressure value of the touch pressure change, or by detecting whether a touch action is generated in the control area based on the loading rate of the touch pressure. The loading rate represents whether the pressure in the control area is increasing or decreasing.

[0148] In the case where whether a touch action is generated in the control area is determined by the pressure value of the touch pressure in the control area, if the pressure value of the touch pressure in the control area is greater than or equal to a predetermined pressure value, it means that the user intends to press the virtual control in the control area, and the action generated in the control area is a touch action; and after the user touches the virtual control, he will also release the virtual control. At this time, if the pressure value of the touch pressure in the control area decreases to another predetermined pressure value, it means that the user intends to release the virtual control, and the action generated in the control area is a release action.

[0149] When whether a touch action is generated in the control area is determined by the loading rate of the pressure value of the touch pressure in the control area, the loading rate actually reflects the change in the pressure value of the touch pressure. The loading rate can be represented by the rate of change of the pressure value to characterize whether it is a touch action of the control area or a release action after touching the control area. During the touch action, if the user presses the virtual control, the pressure in the control area will inevitably increase, and the rate of change of the pressure value is always positive. During the release action, if the user releases the virtual control, the touch pressure in the control area will inevitably decrease, and the rate of change of the pressure value is always negative. It can be directly determined whether it is a process of pressure increase or a process of pressure decrease based on whether the loading rate is positive or negative, thereby determining the touch action of the control area.

[0150] To accurately detect touch actions, it is possible to jointly determine whether a touch action has occurred in the control area based on the change in the touch pressure value and the touch pressure loading rate. This can avoid the problem of misidentifying the user's touch behavior as a touch action and making it difficult to distinguish between a touch action and a release action. The process of jointly determining whether a touch action has occurred in the control area based on the change in the touch pressure value and the touch pressure loading rate specifically includes:

[0151] When it is detected that the pressure value is greater than or equal to a first preset threshold value and the loading rate represents that the accepted touch force becomes larger, the control area is detected to produce the touch action; and when it is detected that the pressure value is less than or equal to a second preset threshold value and the loading rate represents that the accepted touch force becomes smaller, the control area is detected to produce the release action; wherein the second preset threshold value is less than the first preset threshold value.

[0152] In the disclosed embodiment, only the pressure value is used to determine whether a touch action is generated in the control area, and there is a situation where it is impossible to accurately indicate whether the control area generates a touch action or a release action. If only the loading rate is used to determine whether a touch action is generated in the control area, there is a possibility that the user accidentally touches the control area. It is preferred to determine the touched state of the target object by jointly using the pressure value and the loading rate of the pressure value.

[0153] The first preset threshold and the second preset threshold can both be obtained through calibration. When the touch pressure value is greater than or equal to the first preset threshold and the loading rate indicates that the touch force applied to the control area is increasing, it is considered that the user has the intention to touch the control area, rather than an accidental touch. When the touch pressure value is less than or equal to the second preset threshold and the loading rate indicates that the touch force applied to the control area is decreasing, it is considered that the user has the intention to release the touched control area. It is understandable that when the control area is touched, the user simulates the process of pressing, which requires applying a certain amount of pressure to the control area. When the control area is released after touching, the pressure applied to the control area is reduced until the applied pressure disappears. Therefore, in this process, the touch force applied to the control area first increases and then decreases. Therefore, the first threshold can be set to be greater than the second threshold to distinguish between touch actions and release actions.

[0154] The embodiment of the present disclosure obtains the touch pressure applied to the control area when a touch signal is generated in the control area, and detects whether a touch action is generated in the control area based on the change in the pressure value of the touch pressure applied to the control area and the loading rate of the touch pressure. When a touch action is generated, a first drive signal is generated to act on the actuating element, and when a release action is generated, a second drive signal is generated to act on the actuating element. Since the first drive signal and the second drive signal are different, the user can distinguish the tactile feedback of the touch process and the release process, making the touch feedback closer to the real effect; at the same time, since the drive signal is divided into multiple stages according to the time sequence, there is a phase difference greater than 0 degree between the phases of two adjacent stages, so that when the drive signal acts on the actuating element, the vibration of the actuating element can be superimposed, so that the user can feel the touch feedback more obviously, thereby enhancing the touch feedback effect.

[0155] An embodiment of the present disclosure further provides an electronic device, comprising the display device described in the embodiment of the present disclosure; or, the electronic device comprises a processor and a memory, and a computer program stored in the memory and executable on the processor, so that the processor executes the touch feedback method described in the embodiment of the present disclosure.

[0156] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0157] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, commodity, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, commodity, or device that includes the element.

[0158] The display device, touch feedback method and equipment provided by the present disclosure are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present disclosure. The description of the above embodiments is only used to help understand the method and core ideas of the present disclosure. At the same time, for those skilled in the art, according to the ideas of the present disclosure, there may be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present disclosure.

[0159] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0160] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

[0161] References herein to "one embodiment," "an embodiment," or "one or more embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. Furthermore, please note that instances of the phrase "in one embodiment" do not necessarily all refer to the same embodiment.

[0162] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present disclosure may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0163] In the claims, 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 the claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present disclosure may 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 the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

[0164] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present disclosure.

Claims

1. A display device, characterized in that, The display device is configured with a control area, including: a tactile feedback component, the tactile feedback component including a control unit and an actuating element; The control unit is configured to generate a driving signal in response to a touch action generated in the control area; wherein the driving signal is divided into a plurality of stages according to a time sequence, and there is a phase difference greater than 0 degree between phases of adjacent stages; wherein the touch action includes at least one of a touch action of touching the control area and a release action of leaving the control area; The actuator element is configured to generate vibration under the drive of the drive signal.

2. The display device according to claim 1, wherein The phase difference between the phases corresponding to the driving signals in adjacent stages is 180 degrees.

3. The display device according to claim 1, characterized in that, The control unit is specifically configured to generate a first driving signal in response to the touch action, and generate a second driving signal in response to the release action; There is at least one difference between the first driving signal and the second driving signal: amplitude, frequency, phase difference and signal waveform.

4. The display device according to claim 3, wherein The first driving signal is divided into a first stage and a second stage according to the time sequence, and the second driving signal is divided into a third stage and a fourth stage according to the time sequence; The duration of the first stage is different from the duration of the third stage, and / or the duration of the second stage is different from the duration of the fourth stage.

5. The display device according to claim 1, characterized in that, The duration of each stage in the driving signal is a ratio of a preset number of cycles to the frequency of the driving signal; wherein the preset number of cycles is greater than or equal to 1.

6. The display device according to claim 1 or 4, characterized in that, Different phases in the driving signal correspond to the same or different durations.

7. The display device according to claim 1, wherein The driving signal causes the actuating element to vibrate at a frequency of 100-500 Hz.

8. The display device according to any one of claims 1-7, characterized in that, The driving signal includes at least one of a sine wave signal, a cosine wave signal, a triangle wave signal, and a square wave signal.

9. The display device according to claim 1, characterized in that, The display device further includes a detection component, wherein the detection component is configured to detect whether the touch action is generated in the control area in response to a touch signal generated in the control area and based on a change in the touch pressure applied to the control area; The control unit is specifically configured to generate the driving signal in response to the detection component detecting the touch action.

10. The display device according to claim 1, wherein The display device includes a display panel, and the control area includes virtual controls displayed in a display area of ​​the display panel; And / or, the display device includes a touch panel, and the control area is located on the touch panel.

11. The display device according to claim 1, wherein, The display device comprises a display substrate, wherein the display substrate comprises a display area; wherein the actuating element is located at a side of the display substrate away from the display area; and / or the actuating element is located inside the display substrate and arranged close to the display area.

12. The display device according to claim 11, wherein The display substrate is configured with a frame area adjacent to the display area, and the orthographic projection of the actuating element on the display substrate falls into the frame area to generate vibration in the frame area.

13. The display device according to claim 11, wherein The orthographic projection of the actuating element on the display substrate partially overlaps with the orthographic projection of the control area on the display substrate.

14. A touch feedback method, characterized in that, Applied to a display device, the display device is provided with a control area, and the method comprises: In response to a touch action generated in the control area, a driving signal is generated. The driving signal is divided into multiple phases according to a time sequence, and there is a phase difference greater than 0 degrees between the phases of adjacent phases. Among them, the touch action includes at least one of a touch action of touching the control area and a release action of the touch leaving the control area. Apply the driving signal to an actuating element configured on the display device to cause the actuating element to vibrate.

15. The touch feedback method according to claim 14, wherein The generating a driving signal in response to a touch action generated in the control area includes: In response to a touch signal generated in the control area, obtain the touch pressure received by the control area. Based on the change in the touch pressure, detect whether the touch action is generated in the control area. At the moment when it is detected that the touch action is generated in the control area, generate the driving signal.

16. The touch feedback method according to claim 15, wherein The change in touch pressure includes the change in the magnitude of the pressure value of the touch pressure and the loading rate of the touch pressure. Based on the change in the touch pressure, detecting whether the touch action is generated in the control area includes: When the pressure value is greater than or equal to a first preset threshold, or the loading rate indicates that the received touch force becomes larger, detect that the touch action is generated in the control area. When the pressure value is less than or equal to a second preset threshold, and the loading rate indicates that the received touch force becomes smaller, detect that the release action is generated in the control area. Among them, the second preset threshold is less than the first preset threshold.

17. The touch feedback method according to claim 14, wherein The generating a driving signal in response to a touch action generated in the control area includes: Generate a first driving signal in response to the touch action; And generate a second driving signal in response to the release action; Among them, between the first driving signal and the second driving signal, there is at least one of the following differences: amplitude, frequency, the phase difference, and the signal waveform.

18. The touch feedback method according to claim 14, wherein The generating the driving signal includes: Generate the driving signal according to an objective function; among them, the objective function includes any one of a sine wave function, a square wave function, and a triangular wave function; Among them, the objective function is used to indicate the phases corresponding to different stages, so that the driving signal has the phase difference between adjacent stages.

19. An electronic device, characterized in that, Include the display device according to any one of claims 1-14; or, the electronic device includes a processor and a memory, and a computer program stored on the memory and executable on the processor, and when the processor executes, it implements the touch feedback method according to any one of claims 15-19.

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