Display module, touch-control feedback method and electronic device

Abstract

A display module, a touch-control feedback method and an electronic device, which relate to the technical field of tactile feedback. The display module comprises: a display assembly, a touch-control assembly and a tactile feedback assembly, wherein the tactile feedback assembly comprises a controller and an actuating element; the display assembly comprises a display virtual switch; the touch-control assembly is configured to detect the position of a touch-control body in the virtual switch and feed back position information to the controller; the controller is configured to switch a tactile driving signal to a first tactile driving signal when the position information indicates that the touch-control body slides to a first position of the virtual switch, and to output the first tactile driving signal to the actuating element, so as to change the coefficient of friction between the display assembly and the touch-control body; and the location of the first position in the virtual switch corresponds to different switch modes of the virtual switch. By means of the display module provided in the present disclosure, the authentic tactile impression of the virtual switch can be more realistically reproduced on the display module.

Description

Display module, touch feedback method and electronic device Technical Field

[0001] The present disclosure relates to the field of tactile feedback technology, and in particular to a display module, a touch feedback method, and an electronic device. Background Art

[0002] Haptic feedback is used to provide information to people through the sense of touch. Currently, it is widely used in applications such as vibration for incoming call information and force feedback for remote control of robotic arms. In addition to vibration for incoming calls, haptic feedback can also be used to give users feedback on touch signals on the screen.

[0003] Overview

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

[0005] In a first aspect of the present disclosure, a display module is provided, comprising: a display component, a touch component, and a tactile feedback component, wherein the tactile feedback component comprises a controller and an actuating element, wherein:

[0006] The display component includes a display virtual switch;

[0007] The touch control component is configured to detect the position of the touch control body in the virtual switch and feed back the position information to the controller;

[0008] The controller is configured to, when the position information indicates that the touch-sensitive body has slid to the first position of the virtual switch, switch the tactile drive signal to a first tactile drive signal, and output the first tactile drive signal to the actuator to change the friction coefficient between the display assembly and the touch-sensitive body;

[0009] The position of the first position in the virtual switch corresponds to different switching modes of the virtual switch.

[0010] Exemplarily, the controller is further configured to generate a second tactile drive signal when the position information indicates a position of the touch-sensitive body before sliding to the first position, and switch the second tactile drive signal to the first tactile drive signal when the touch-sensitive body slides to the first position;

[0011] The waveform corresponding to the first haptic drive signal is different from the waveform corresponding to the second haptic drive signal.

[0012] Exemplarily, the second tactile drive signal differs from the first tactile drive signal in at least the number of wave nodes.

[0013] Exemplarily, there is a phase difference between the second haptic drive signal and the first haptic drive signal.

[0014] Exemplarily, the phase difference is 180 degrees.

[0015] Exemplarily, the second haptic drive signal and the first haptic drive signal each carry a carrier signal with a different frequency.

[0016] Exemplarily, the virtual switch includes a middle position, and two sides of the middle position correspond to different switch modes respectively;

[0017] The first position is the middle position or any one of the positions on both sides of the middle position.

[0018] Exemplarily, the controller is further configured to generate a third tactile drive signal adapted to a second position of the touch-sensitive object when the touch-sensitive object slides before the first position and / or slides after the first position, and to apply the third tactile drive signal to the actuator element;

[0019] The amplitudes of the modulated wave signals carried by the third tactile driving signals corresponding to different second positions are different, so that the actuating element vibrates with different amplitudes corresponding to different second positions.

[0020] Exemplarily, the third haptic drive signals corresponding to different second positions carry the same carrier signal.

[0021] Exemplarily, an amplitude of a modulated wave signal in the third haptic drive signal corresponding to a second position close to the first position is greater than an amplitude of a modulated wave signal in the third haptic drive signal corresponding to a second position far from the first position.

[0022] Exemplarily, the plurality of second positions include a plurality of third positions located before the second position, and a plurality of fourth positions located after the second position.

[0023] Among them, the amplitude of the modulated wave signal in the third tactile drive signal corresponding to each of the multiple third positions gradually increases toward the first position; and / or the amplitude of the modulated wave signal in the third tactile drive signal corresponding to each of the multiple fourth positions gradually decreases toward the direction away from the first position.

[0024] Exemplarily, the amplitude of the modulated wave signal in the third tactile drive signal corresponding to each of the plurality of third positions increases according to a first slope or a first sinusoidal function toward the direction approaching the first position.

[0025] Exemplarily, the amplitude of the modulated wave signal in the third tactile drive signal corresponding to each of the plurality of fourth positions decreases according to a second slope or a second sinusoidal function in a direction away from the first position.

[0026] Exemplarily, a difference between a maximum amplitude corresponding to the plurality of third haptic drive signals and an amplitude of the modulated wave signal in the first haptic drive signal is smaller than a preset difference.

[0027] Exemplarily, the controller is further configured to switch the tactile drive signal to a fourth tactile drive signal and the first tactile drive signal when the touch-sensitive body slides to the first position;

[0028] The frequency of the carrier signal in the fourth haptic drive signal gradually increases, and a difference between a maximum frequency of the carrier signal in the fourth haptic drive signal and a maximum frequency of the carrier signal in the first haptic drive signal is smaller than a preset frequency difference.

[0029] Exemplarily, the tactile driving signal causes the amplitude of the actuating element in the normal direction of the display substrate to be greater than or equal to 1 μm.

[0030] Exemplarily, the display component 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 within the display substrate and arranged close to the display area.

[0031] Exemplarily, the actuating element includes a plurality of sub-vibration elements, and the plurality of sub-vibration elements are distributed at intervals;

[0032] The display module also includes a control component, which is configured to detect the target display position of the virtual switch and transmit the drive signal to at least one sub-vibration element at the target display position so that the sub-vibration element at the target display position vibrates in response to the tactile drive signal.

[0033] In a second aspect of the present disclosure, a touch feedback method is provided, which is applied to a display module, wherein the display module is configured with a display component, and the method includes:

[0034] Detecting the position of the touch body in the virtual switch;

[0035] When the position indicates that the touch-sensitive body slides to the first position of the virtual switch, switching the tactile driving signal to a first tactile driving signal;

[0036] outputting the first tactile driving signal to the actuating element to change the friction coefficient between the display component and the touch-sensitive body;

[0037] The position of the first position in the virtual switch corresponds to different switching modes of the virtual switch.

[0038] Exemplarily, the method further includes:

[0039] When detecting that the touch-sensitive body slides before the first position and / or slides after the first position, generating a third tactile driving signal adapted to the second position according to the second position of the touch-sensitive body;

[0040] applying the third haptic drive signal to the actuator;

[0041] The amplitudes of the modulated wave signals carried by the third tactile driving signals corresponding to different second positions are different, so that the actuating element vibrates with different amplitudes corresponding to different second positions.

[0042] In a third aspect of the present disclosure, an electronic device is provided, which includes the display module described in the first aspect of the present disclosure; or, the electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the touch feedback method described in the second aspect of the present disclosure is implemented.

[0043] The present disclosure provides a display module, which includes: a display component, a touch component and a tactile feedback component, wherein the tactile feedback component includes a controller and an actuator element, wherein the display component includes a display virtual switch; the touch component is configured to detect the position of a touch body in the virtual switch and feedback the position information to the controller; the controller is configured to switch the tactile drive signal to a first tactile drive signal when the position information indicates that the touch body slides to the first position of the virtual switch, and output the first tactile drive signal to the actuator element to change the friction coefficient between the display component and the touch body, thereby simulating a human operating a real mechanical switch. the interaction force between the finger and the switch when the first position corresponds to the different switch modes of the virtual switch, and when the touch body is at the first position, the controller outputs the first tactile drive signal to act on the actuator to generate vibration, so as to drive the display component to resonate in the display area, so as to change the friction coefficient between the display component and the touch body, so that when the touch body reaches the position of different switch modes, vibration can be generated to bring a tactile experience to the touch body, so that appropriate signal feedback can be given when the user operates the virtual control in the display area, so as to bring the user a more realistic tactile experience of a mechanical switch.

[0044] 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.

[0045] BRIEF DESCRIPTION OF THE DRAWINGS

[0046] 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.

[0047] FIG1 shows a schematic diagram of four mechanical switches in the related art;

[0048] FIG2 is a schematic diagram showing virtual switches of three display modules in the related art;

[0049] FIG3 shows a schematic diagram of functional modules of a display module according to an embodiment of the present disclosure;

[0050] FIG4 shows a schematic diagram of a first standing wave mode of a display assembly according to an embodiment of the present disclosure;

[0051] FIG5 is a schematic diagram showing a second standing wave mode of a display assembly according to an embodiment of the present disclosure;

[0052] FIG6 shows a schematic diagram of a virtual switch in an embodiment of the present disclosure;

[0053] FIG7 is a schematic diagram showing the change of the lateral force of the touch-sensitive body sliding virtual switch in an embodiment of the present disclosure;

[0054] FIG8 shows a schematic diagram of a first switching method of a tactile driving signal of a display module according to an embodiment of the present disclosure;

[0055] FIG9 shows a second switching diagram of a tactile driving signal of a display module in an embodiment of the present disclosure;

[0056] FIG10 is a schematic diagram showing the variation of lateral force when a touch-sensitive body slides three different virtual switches in an embodiment of the present disclosure;

[0057] FIG11 shows a third switching diagram of a tactile driving signal of a display module in an embodiment of the present disclosure;

[0058] FIG12 shows a fourth switching diagram of a tactile driving signal of a display module in an embodiment of the present disclosure;

[0059] FIG13 shows a fifth switching diagram of a tactile driving signal of a display module according to an embodiment of the present disclosure;

[0060] FIG14 shows a detailed schematic diagram of the functional modules of the display module in an embodiment of the present disclosure;

[0061] FIG15 shows a flowchart of the steps of the touch feedback method in an embodiment of the present disclosure.

[0062] Detailed description

[0063] To further clarify the objectives, technical solutions, and advantages of the embodiments of the present disclosure, the following will provide a clear and complete description of the technical solutions in the embodiments of the present disclosure, in conjunction with the accompanying drawings. It should be understood that the described embodiments are only a portion of the embodiments of the present disclosure, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present disclosure without inventive effort are intended to fall within the scope of protection of the present disclosure.

[0064] With the widespread use of touch screens, current electronic products have reduced the use of mechanical buttons for aesthetics and convenience. Instead of traditional mechanical switches, virtual switches are displayed on the touch screen. Consequently, the requirements for accurate recognition of virtual switches are becoming increasingly stringent. Generally speaking, touch screens are vibration-based tactile reproduction devices. Their working principle is typically to attach a piezoelectric plate, linear motor, or piezoelectric film to a flat surface and apply pulse excitation to achieve touch functions such as virtual switches. Virtual switches are typically implemented in two ways: 1. Using an actuator to generate low-frequency vibrations to simulate button tactile feedback; 2. Using a high-frequency structural vibration to generate a squeeze film effect, which changes the friction coefficient between the finger and the surface of the tactile feedback plate to simulate texture tactile feedback. Among them, tactile feedback designs using low-frequency vibration can be achieved through normal or lateral vibration of the structure. Typically, when the actuator can generate sufficient amplitude, the system only needs to drive the structure through the actuator to produce the corresponding tactile feedback. When the actuator's driving capability is weak, structural design is required to make the device resonate, thereby generating sufficient amplitude and thus achieving the corresponding tactile feedback. Tactile feedback designs using high-frequency vibration are often used to produce textured tactile feedback, such as touching silk or carpet. However, current virtual switches cannot simulate the interaction force between a person's finger and the switch when operating a physical mechanical switch, and therefore cannot reproduce tactile interaction.

[0065] There are various switches in real life. Referring to Figure 1, Figure 1 shows a schematic diagram of four mechanical switches in the related art. It can be seen from Figure 1 that the switch in Figure 1 needs to be operated by sliding the finger, and this type of switch is usually designed for multi-modal interaction such as vision, hearing, touch, and temperature, which is difficult to integrate into the display module. Therefore, in order to meet the needs of users, a switch integrated in the display module is derived. Referring to Figure 2, Figure 2 shows a schematic diagram of three display module virtual switches in the related art. The switch in Figure 2 is integrated into the display module instead of Figure 1, and the visual perception during real operation can be simulated in the form of images and animations to realize the function of the switch. However, it is impossible to simulate the interaction force between the finger and the switch when a person operates the physical switch, and it is also impossible to reproduce the tactile interaction, and it is also impossible to completely replace the tactile modal interaction of the four mechanical switches in Figure 1, and it can only provide a simple prompt function.

[0066] In view of this, the present application proposes a display module, a touch feedback method, an electronic device and a medium to solve the above-mentioned problems, ensure the dynamic lateral force changes between the finger and the switch during the reproduction operation, more realistically reproduce the touch of the sliding switch on the display module, and realize tactile modal interaction.

[0067] Referring to Figure 3, Figure 3 shows a schematic diagram of the functional modules of the display module in an embodiment of the present disclosure. It can be seen from Figure 3 that the display module includes: a display component, a touch component and a touch feedback component. The tactile feedback component includes a controller and an actuator element, and the display component includes a display virtual switch.

[0068] The touch components and controllers are configured to have the following functions:

[0069] The touch component is configured to detect the position of the touch body in the virtual switch and feed back the position information to the controller.

[0070] The controller is configured to switch the tactile drive signal to a first tactile drive signal when the position information indicates that the touch body has slid to the first position of the virtual switch, and output the first tactile drive signal to the actuator to change the friction coefficient between the display component and the touch body; wherein the position of the first position in the virtual switch corresponds to different switching modes of the virtual switch.

[0071] In this embodiment, the display module is configured with a display component, which can be an OLED (Organic Light-Emitting Diode) display screen, an LCD (Liquid Crystal Display) display screen, etc., which can be applied to a laptop computer or a computer. The display component is configured with a virtual switch, which can be displayed. The virtual switch refers to a switch on the display module that can be operated by sliding a user's finger. The virtual switch is used to simulate a real mechanical switch in the display component for user operation. The virtual switch can accept user touch operation. Alternatively, the display component can also be configured with a gesture recognition component to recognize the user's gestures, thereby realizing gesture-based control of the virtual switch.

[0072] Of course, in this embodiment, the display module can be configured with a touch component, which is configured to detect the position of the touch body in the virtual switch and feedback the position information to the controller. The touch body can be a user's finger or a stylus that supports virtual switch recognition. The touch component is a hardware for detecting the position of the touch body in the virtual switch, which can be a detection circuit. The detection circuit is used to sense the position of the touch body when it contacts the virtual switch and send the position to the controller. A sliding icon is set in the virtual switch, and the sliding icon is used to be contacted and dragged by the touch body. The user can move the sliding icon on the virtual switch to operate the virtual switch. Specifically, refer to the virtual switch shown in Figure 2. A sliding icon can be set on the virtual switch. The user can move the sliding icon on the virtual switch by operating the finger. According to the touch component, the position where the contact member finally stops is detected, and the position information is fed back to the controller, so that the controller can know the current position of the contact body in the virtual switch.

[0073] In addition, in this embodiment, the display module may also be configured with a haptic feedback component, which includes a controller and an actuator. The controller is configured to switch the haptic drive signal to a first haptic drive signal when the position information indicates that the touch-sensitive body has slid to the first position of the virtual switch, and output the first haptic drive signal to the actuator. The first position is the position where the device corresponding to the virtual switch needs to be switched. For example, the virtual switch controls two switching modes of a device, namely a first switching mode and a second switching mode. Under normal circumstances, the device is in the first switching mode. When the touch-sensitive body slides the device's sliding key on the virtual switch to the first position, it indicates that the device has switched from the first switching mode to the second switching mode. To inform the user of the smooth switch to the second switching mode, the haptic drive signal is switched. For example, switching to the first haptic drive signal may include switching the haptic drive signal corresponding to the first switching mode to the first haptic drive signal corresponding to the second switching mode. Alternatively, a first haptic drive signal may be generated starting at the first position and output to the actuator. Since the position of the first position in the virtual switch corresponds to different switching modes of the virtual switch, the first tactile drive signal can also be the device's on-state signal. Only when the touch body slides to the first position of the virtual switch, the tactile drive signal is switched to the first tactile drive signal and output to the actuator to change the friction coefficient between the display component and the touch body, so that the touch body knows that the device has been turned on through the friction force fed back by the display component.

[0074] The tactile driving signal may be an electrical signal that can cause the actuator to vibrate.

[0075] An actuator is a device that converts electrical energy, thermal energy, mechanical energy, or other forms of energy into mechanical displacement or force. Its function is to control the size and direction of mechanical motion or force according to the input signal or instruction. In this embodiment, the actuator can be a piezoelectric plate, and the actuator is installed under the display component, or around the display component. When the first tactile drive signal is transmitted to the actuator, the actuator responds to the first tactile drive signal to generate vibration, which can stimulate the display component to resonate, thereby changing the friction coefficient between the display component and the touch body, and then changing the friction between the display component and the touch body, so that the touch body feels different degrees of resonance feedback, and this resonance feedback is the same as the tactile feeling of operating a real mechanical switch.

[0076] For example, the following description is made using an OLED display screen as an example:

[0077] Referring to Figures 4 and 5, Figure 4 shows a schematic diagram of the first standing wave mode of the display assembly in the embodiment of the present disclosure; Figure 5 shows a schematic diagram of the second standing wave mode of the display assembly in the embodiment of the present disclosure. Figures 4 and 5 both depict standing wave modes of two different frequencies above 20kHz, with the frequency f1 corresponding to Figure 4 being: f1 = 30151 Hz, and the eigenmode corresponding to f1 being Z1; the frequency f2 corresponding to Figure 5 being: f2 = 26542 Hz, and the eigenmode corresponding to f2 being Z2. Different eigenmodes correspond to different natural frequencies, and as long as the frequencies are different, the corresponding eigenmodes are also different.

[0078] Assuming that the actuator is a piezoelectric piece, applying a sinusoidal signal with a frequency of f1 or f2 to the piezoelectric piece can stimulate the display component (display screen) to resonate. At this time, the touch body slides and the sliding icon moves on the virtual switch, generating an extrusion film. By adjusting the amplitude and signal form of the tactile drive signal, the friction coefficient between the display component and the touch body can be changed. Therefore, when sliding to the first position, the tactile drive signal is switched, and the vibration amplitude and waveform of the actuator will change, which can bring about a change in the friction coefficient. Then, appropriate signal feedback can be given when the user operates the virtual control in the display area, so as to bring the user a more realistic mechanical switch tactile experience.

[0079] Furthermore, the position of the first position in the virtual switch corresponds to different switching modes of the virtual switch. Therefore, as the touch component moves within the virtual switch, its position changes. The tactile drive signal can generate tactile drive signals corresponding to each position based on the position change. The tactile drive signals generated at different positions can differ, for example, in phase, frequency, amplitude, and duration, simulating the tactile modes of a real mechanical switch. This allows the user to experience varying degrees of resonant feedback as they directly drag the touch component within the virtual switch, similar to the tactile sensation of operating a real mechanical switch.

[0080] The present disclosure provides a display module, which includes: a display component, a touch component and a tactile feedback component, wherein the tactile feedback component includes a controller and an actuator element, wherein the display component includes a display virtual switch; the touch component is configured to detect the position of a touch body in the virtual switch and feedback the position information to the controller; the controller is configured to switch the tactile drive signal to a first tactile drive signal when the position information indicates that the touch body slides to the first position of the virtual switch, and output the first tactile drive signal to the actuator element to change the friction coefficient between the display component and the touch body, thereby simulating a human operating a real mechanical switch. the interaction force between the finger and the switch when the first position corresponds to the different switch modes of the virtual switch, and when the touch body is at the first position, the controller outputs the first tactile drive signal to act on the actuator to generate vibration, so as to drive the display component to resonate in the display area, so as to change the friction coefficient between the display component and the touch body, so that when the touch body reaches the position of different switch modes, vibration can be generated to bring a tactile experience to the touch body, so that appropriate signal feedback can be given when the user operates the virtual control in the display area, so as to bring the user a more realistic tactile experience of a mechanical switch.

[0081] In one embodiment, the controller is further configured to generate a second tactile drive signal when the position information indicates the position of the touch body before sliding to the first position, and to switch the second tactile drive signal to the first tactile drive signal when the touch body slides to the first position; wherein the waveform corresponding to the first tactile drive signal is different from the waveform corresponding to the second tactile drive signal.

[0082] In this embodiment, the first sliding position of the sliding button in the virtual switch is the position where the tactile signal is switched to the first tactile signal. Referring to FIG6 , FIG6 shows a schematic diagram of a virtual switch in an embodiment of the present disclosure. As can be seen from FIG6 , the middle position of the virtual switch is the first position, and the position before the first position can be the left position of the middle position or the right position of the middle position. Specifically, when the virtual switch supports left and right sliding, the positions on both sides of the first position can be understood as the positions before the first position. For example, if the sliding icon in the virtual switch slides to the right, the position before the first position is the left position of the first position. If the sliding icon in the virtual switch slides from left to right, the position before the first position can be the right position of the first position.

[0083] Therefore, the controller is further configured to generate a second haptic drive signal when the position information indicates the position of the touch body before sliding to the first position, and switch the second haptic drive signal to the first haptic drive signal when the touch body slides to the first position.

[0084] Referring to FIG. 7 , FIG. 7 shows a schematic diagram of the lateral force variation when the touch body slides the virtual switch in an embodiment of the present disclosure. As can be seen from FIG. 7 , when the touch body touches the touch component in the virtual switch and slides, a lateral force exists between the finger and the touch component. This lateral force first increases and then decreases as the finger slides and the sliding icon in the virtual switch moves. There is a maximum lateral force throughout the entire sliding process. Therefore, when the virtual tactile reproduction slides the button, the variation characteristics of this lateral force can be simulated.

[0085] In this way, the first position can be the switching position of different switch modes. When the touch body slides the icon along one direction, when it slides to the position before the first position, the controller outputs the second tactile drive signal to the actuating element. When the touch body slides to the first position, the controller outputs the first tactile drive signal to the braking element, thereby generating a switch from the second tactile drive signal to the first tactile drive signal at the first position. This switching process of the tactile drive signal can bring a tactile experience of switching the switch mode to the touch body.

[0086] For example, assuming that the virtual switch includes a first switch mode and a second switch mode, the first tactile drive signal corresponds to Figure 5, and the second tactile drive signal corresponds to Figure 4. When the touch body slides from a position before the first position to the first position, in order to allow the user to clearly perceive the success of the switch from the first switch mode to the second switch mode, and also to simulate the changing characteristics of the lateral force in Figure 7, the waveform corresponding to the first tactile drive signal and the waveform corresponding to the second tactile start signal are different. The difference in waveforms may specifically be a difference in phase, frequency, amplitude, and number of wave nodes.

[0087] For example, when the touch body slides from a position before the first position to the first position, it indicates that the touch body is being slid by the user. Because the position of the first position in the virtual switch corresponds to different switching modes of the virtual switch, the first position can correspond to controlling the startup of different electronic devices, and can also correspond to different switching modes of the same electronic device.

[0088] Therefore, in the process of the touch body moving toward the first position, when the touch body reaches the first position, a first tactile drive signal is generated. Because the first position is the switching position between the first tactile drive signal and the second tactile drive signal, if the position before the first position corresponds to the activation of the first electronic device, and the first position corresponds to the activation of the second electronic device, the first electronic device will be turned off and the second device will be switched on. In order to allow the user's finger, that is, the touch body, to clearly feel the switch from the first electronic device to the second electronic device, the waveform corresponding to the first tactile drive signal and the waveform corresponding to the second tactile activation signal are different. The signals generated by the different waveforms act on the actuator and generate different vibrations, so that the display component can break the resonance and change the friction coefficient between the touch body and the display component, so that a significant vibration change can be felt at the first position. Finally, the user can feel the different vibration changes and know that the device switch is successful.

[0089] In one embodiment, the second tactile drive signal differs from the first tactile drive signal in at least the number of wave nodes.

[0090] In this embodiment, a node refers to the location where the amplitude of a wave reaches zero when propagating through a medium, i.e., the zero-value point on the wave's sine curve. Different numbers of node points result in different waveforms of the tactile drive signal. Therefore, the first and second tactile drive signals, acting on the actuator to generate vibrations that resonate with the display assembly, also differ in the friction coefficient between the display assembly and the touch-sensitive body. Referring to Figures 4 and 5 , it can be seen that both eigenmodes Z1 and Z2 are standing wave modes in the ultrasonic frequency band, differing in the number of node points. In this embodiment, Z1 has 15 node points, while Z2 has 16.

[0091] In one embodiment, there is a phase difference between the second haptic drive signal and the first haptic drive signal.

[0092] In this embodiment, the second tactile drive signal and the first tactile drive signal may be tactile drive signals having the same frequency, amplitude, and duration, but having a phase difference. Specifically, when there is a phase difference between the second tactile drive signal and the first tactile drive signal, the vibration phases of the two signals change. As a result, during the switching process of the tactile drive signal, the greater the intensity of the signal breaking resonance, the greater the change in the friction coefficient between the touch-sensitive body and the display assembly, the stronger the pulling sensation of the lateral force, and the more realistic the simulation of the lateral force during the mechanical switch switching process, thereby providing the user with a more obvious switching experience.

[0093] In one embodiment, the phase difference is 180 degrees.

[0094] In this embodiment, the phase difference between the second haptic driving signal and the first haptic driving signal is 180 degrees.

[0095] For example, referring to Figure 8, Figure 8 shows a first switching diagram of the tactile drive signal of the display module in an embodiment of the present disclosure. Combined with Figures 4 and 5, the tactile drive signal V(t) in Figure 8 is composed of a modulated wave signal F1(t) and a carrier signal Q(t), wherein the carrier signal Q(t) is divided into two sections, namely a first carrier signal Q1(t) and a second carrier signal Q2(t). The first carrier signal Q1 is the carrier signal in the first tactile drive signal, and the second carrier signal Q2 is the carrier signal in the second tactile drive signal. The first carrier signal Q1(t) and the second carrier signal Q2(t) are both sinusoidal waves with equal amplitudes, and are carrier signals with frequencies f1 and f2, respectively. The first carrier signal Q1(t) corresponds to the characteristic mode Z1, and the second carrier signal Q2(t) corresponds to the characteristic mode Z2. The modulated wave signal F1 is a constant value, and this constant voltage value can excite the device to generate a normal amplitude ≥1μm.

[0096] The first tactile driving signal: V(t)=F1(t)*Q(t);

[0097] Modulation wave signal F1(t): F1(t)=A0;

[0098] Carrier signal Q(t):

[0099] Among them, the first tactile driving signal V1(t)=Q1(t)*F1(t); the second tactile driving signal V2(t)=Q2(t)*F1(t); Q1(t)=sin(2πf1t); Q2(t)=sin(2πf2t+π); Δt1+Δt2=Δt.

[0100] As shown in Figure 8, because the phase of the carrier signal in the first tactile drive signal is opposite to that of the carrier signal in the second tactile drive signal, while the modulated wave signal remains unchanged, the first and second tactile drive signals differ in phase by 180 degrees, Δt1 and Δt2 are equal, and f1 = f2. When the touch-sensitive element is slid or moved to the first position, the phase of the tactile drive signal is altered to change the coefficient of friction between the display element and the touch-sensitive element, thereby changing the friction between the display element and the touch-sensitive element. This simulates the lateral force change of a virtual switch, thereby enhancing the user's interactive experience when operating the virtual switch.

[0101] In addition, Δt1 and Δt2 may not be equal, and f1 and f2 may not be equal, as long as the phase difference between the carrier signal in the first haptic drive signal and the carrier signal in the second haptic drive signal is 180 degrees.

[0102] Therefore, when the second tactile drive signal is switched to the first tactile drive signal, the first tactile drive signal can be superimposed with the vibration generated by the first tactile drive signal acting on the actuating element on the basis of the original second tactile drive signal acting on the actuating element to cause the actuating element to vibrate, so as to strengthen the vibration of the actuating element and make the resonant vibration of the display component greater, thereby further increasing the friction coefficient between the display component and the touch body, and then increasing the resistance of the sliding button in the touch body sliding virtual switch, so as to bring a more realistic mechanical switch tactile experience to the user.

[0103] In one embodiment, the second haptic drive signal and the first haptic drive signal each carry a carrier signal with a different frequency.

[0104] In this embodiment, the frequencies of the carrier signals carried by the second tactile drive signal and the first tactile drive signal are different. Specifically, the frequency of the carrier signal carried by the second tactile drive signal may be greater than the frequency of the carrier signal carried by the first tactile drive signal, or the frequency of the carrier signal carried by the second tactile drive signal may be less than the frequency of the carrier signal carried by the first tactile drive signal. Alternatively, the carrier signal carried by the second tactile drive signal may be a carrier signal with a gradually changing frequency, and the carrier signal carried by the first tactile drive signal may be a carrier signal with a constant frequency, etc. As long as the frequencies of the carrier signals carried by the second tactile drive signal and the first tactile drive signal are different, this embodiment does not impose any limitation.

[0105] For example, referring to Figure 9, Figure 9 shows a second switching schematic diagram of the tactile drive signal of the display module in an embodiment of the present disclosure; combined with Figures 4 and 5, the tactile drive signal V(t) in Figure 9 is composed of a modulated wave signal F1(t) and a carrier signal Q(t), wherein the carrier signal Q(t) is divided into two sections, namely a first carrier signal Q1(t) and a second carrier signal Q2(t). The first carrier signal Q1 is the carrier signal in the first tactile drive signal, and the second carrier signal Q2 is the carrier signal in the second tactile drive signal. The first carrier signal Q1(t) and the second carrier signal Q2(t) are both sinusoidal waves with equal amplitudes, and are carrier signals with frequencies f1 and f2, respectively. The first carrier signal Q1(t) corresponds to the characteristic mode Z1, and the second carrier signal Q2(t) corresponds to the characteristic mode Z2. The modulated wave signal F1 is a constant value, and this constant voltage value can excite the device to generate a normal amplitude ≥1μm.

[0106] The third tactile driving signal: V(t)=F1(t)*Q(t);

[0107] Modulation wave signal F1(t): F1(t)=A0;

[0108] Carrier signal Q(t):

[0109] Among them, the first tactile driving signal V1(t)=Q1(t)*F1(t); the second tactile driving signal V2(t)=Q2(t)*F1(t); Q1(t)=sin(2πf1t); Q2(t)=sin(2πf2t); Δt1+Δt2=Δt.

[0110] As shown in Figure 9, the second tactile drive signal V2(t) and the first tactile drive signal V1(t) can excite the Z1 and Z2 eigenmodes of the structure, respectively. When the structure is in the Z1 or Z2 resonant mode, the squeeze film effect causes the friction coefficient between the finger and the display to be less than the friction coefficient between the finger and the substrate in the static switching mode. When the substrate switches from resonant mode Z1 to Z2, it deviates from the resonant switching mode, and the friction coefficient increases. When the switch is complete, the friction coefficient decreases again. The time Δt1 and Δt2 are related to the sliding speed of the touch object sliding the sliding icon. When the touch object slides the sliding icon to the first position of the virtual switch, the first tactile drive signal is switched. To ensure that the user's finger can clearly perceive the successful switching process through the tactile vibration feedback of the display component, the frequency of the carrier signal in the first tactile drive signal is different from the frequency of the carrier signal in the second tactile drive signal. This ensures that the user's finger can clearly perceive the successful switching process when the second tactile drive signal switches to the first tactile drive signal through tactile vibration feedback.

[0111] In one embodiment, the virtual switch includes a middle position, and both sides of the middle position correspond to different switch modes respectively; wherein the first position is the middle position and any position located on both sides of the middle position.

[0112] In this embodiment, the virtual switch includes a middle position, and both sides of the middle position correspond to different switch modes, wherein the first position can be the middle position, that is, the centerline position of the virtual switch; it can also be any position on both sides of the middle position, that is, the position to the left of the centerline of the virtual switch, or the position to the right of the centerline of the virtual switch.

[0113] For example, referring to FIG10 , FIG10 shows a schematic diagram of the lateral force change of the touch body sliding three different virtual switches in an embodiment of the present disclosure. The arrow represents the sliding direction of the touch body, and the curve represents the change of the lateral force as the touch body slides. The lateral force in this embodiment can also be understood as friction. As can be seen from FIG10 , there are three situations in which the lateral force of the touch body and the virtual switch changes during the sliding process, namely: (a): When the touch component in the virtual switch slides to the midline position, the lateral force is the largest. (b): When the touch component in the virtual switch slides to the δ1 position in front of the midline, the lateral force is the largest. (c): When the touch component in the virtual switch slides beyond the midline δ1 position, the lateral force is the largest.

[0114] The following will be combined with FIG9 to provide a detailed description of the three different virtual switches provided in this embodiment:

[0115] Taking (a) in Figure 10 as an example, the first position is in the middle position. When the lateral force of the virtual switch reaches its maximum value at the front end δl away from the centerline of the sliding switch, when the touch-sensitive body touches the left side of the virtual switch, the controller triggers the tactile feedback function and generates a second tactile drive signal V2(t) to be sent to the actuator. When the touch-sensitive body controls the touch component to slide to the centerline of the switch, that is, the first position, the second tactile drive signal V2(t) needs to be switched to the first tactile drive signal V1(t). At this time, the controller generates the first tactile drive signal V1(t) and sends it to the actuator, stopping the second tactile drive signal V2(t) from being sent to the actuator. Then, when the touch-sensitive body controls the touch component to slide to the right, the first tactile drive signal V1(t) stops being sent to the actuator. Similarly, the controller can trigger the tactile feedback function when a finger touches the left side of the sliding switch and begins to slide.

[0116] Taking (b) in Figure 10 as an example, the first position is to the right of the middle position. When the lateral force of the virtual switch reaches its maximum value at a point δl to the right of the centerline of the sliding switch, and when the touch-sensitive body touches the left side of the virtual switch, the controller triggers the tactile feedback function and generates a second tactile drive signal V2(t) to be sent to the actuator. When the touch-sensitive body controls the touch component to slide beyond the switch centerline δl, that is, at the first position, the second tactile drive signal V2(t) needs to be switched to the first tactile drive signal V1(t). At this time, the controller generates the first tactile drive signal V1(t) and sends it to the actuator, stopping the second tactile drive signal V2(t) from being sent to the actuator. When the touch-sensitive body controls the touch component to slide to the right, the first tactile drive signal V1(t) stops being sent to the actuator. Similarly, the controller can also trigger the tactile feedback function when a finger touches the left side of the sliding switch and begins to slide.

[0117] Taking (c) in Figure 10 as an example, the first position is to the left of the middle position. When the lateral force of the virtual switch reaches its maximum value at a distance δl to the left of the centerline of the sliding switch, when the touch-sensitive body touches the left side of the virtual switch, the controller triggers the tactile feedback function and generates a second tactile drive signal V2(t) to be sent to the actuator. When the touch-sensitive body controls the touch component to slide to a distance δl from the centerline of the switch, that is, the first position, the second tactile drive signal V2(t) needs to be switched to the first tactile drive signal V1(t). At this time, the controller generates the first tactile drive signal V1(t) and sends it to the actuator, stopping the second tactile drive signal V2(t) from being sent to the actuator. When the finger slides to the right, the first tactile drive signal V1(t) stops being sent to the actuator. Similarly, the controller can trigger the tactile feedback function when the finger touches the left side of the sliding switch and begins to slide.

[0118] In one embodiment, the controller is further configured to generate a third tactile drive signal adapted to the second position according to the second position of the touch body when the touch body slides before the first position and / or slides after the first position, and apply the third tactile drive signal to the actuator element; wherein the amplitude of the modulated wave signal carried by the third tactile drive signal corresponding to different second positions is different, so that the actuator element vibrates with different amplitudes at different second positions.

[0119] In this embodiment, the controller is further configured to generate a third tactile drive signal adapted to the second position according to the second position of the touch body when the touch body slides before the first position and / or slides after the first position. The third tactile drive signal can be used to assist the first tactile drive signal and / or the second tactile drive signal. Regardless of whether the first tactile drive signal or the second tactile drive signal acts on the actuator, the actuator will change the coefficient of friction between the display component and the touch body. In order to enhance the user's finger feeling of different degrees of resonant feedback, the third tactile drive signal adapted to the second position can be generated according to the second position of the touch body when sliding before the first position and / or sliding after the first position, and the third tactile drive signal can be applied to the actuator to further change the coefficient of friction between the display component and the touch body, thereby adding a new resonant feedback tactile sensation to the user.

[0120] If the second position is before the first position, a different third tactile driving signal is generated as the second position changes, slowly transitioning to the second tactile driving signal, and then switching to the first tactile driving signal when reaching the first position;

[0121] Alternatively, the second position is after the first position, and as the second position changes, a different third tactile driving signal is generated, gradually transitioning from the first tactile driving signal to the third tactile driving signal;

[0122] Alternatively, the second position includes both a position set before the first position and a position set after the first position. Then, as the second position before the first position changes, it slowly transitions to the second tactile drive signal, and when it reaches the first position, it switches to the first tactile drive signal. After passing the first position, as the second position after the first position changes, it gradually transitions from the first tactile drive signal to the third tactile drive signal.

[0123] Among them, one way in which the amplitudes of the modulated wave signals carried by the third tactile drive signals corresponding to different second positions are different may be: the closer the third tactile drive signal is to the first position, the larger the amplitude of the modulated wave signals carried by the third tactile drive signal is; or, another way may be: in the direction toward the first position, the amplitudes of the modulated wave signals carried by the third tactile drive signal successively increase and then decrease, or successively decrease and then increase.

[0124] In one embodiment, an amplitude of a modulated wave signal in the third haptic drive signal corresponding to a second position close to the first position is greater than an amplitude of a modulated wave signal in the third haptic drive signal corresponding to a second position far from the first position.

[0125] In this embodiment, the closer the third tactile drive signal is to the first position, the larger the amplitude of the modulated wave signal carried by the third tactile drive signal is. That is, in the direction toward the first position, the amplitude of the modulated wave signal carried by the third tactile drive signal increases successively.

[0126] Among them, one way of increasing the amplitude in sequence is linear growth or nonlinear growth. In linear growth, it can be a straight line growth with a fixed slope. In nonlinear growth, it can be a sinusoidal function growth.

[0127] In this embodiment, in one embodiment, the multiple second positions include multiple third positions located before the second position, and multiple fourth positions located after the second position, wherein the amplitude of the modulated wave signal in the third tactile drive signal corresponding to each of the multiple third positions gradually increases toward the direction approaching the first position; and / or the amplitude of the modulated wave signal in the third tactile drive signal corresponding to each of the multiple fourth positions gradually decreases toward the direction away from the first position.

[0128] In this embodiment, the multiple second positions include multiple third positions located before the second position, and multiple fourth positions located after the second position, and the amplitude of the modulated wave signal in the third tactile drive signal corresponding to each of the multiple third positions gradually increases toward the first position, and the amplitude of the modulated wave signal in the third tactile drive signal corresponding to each of the fourth positions remains unchanged.

[0129] Alternatively, the multiple second positions include multiple third positions located before the second position, and multiple fourth positions located after the second position, the amplitude of the modulated wave signal in the third tactile drive signal corresponding to each of the third positions remains unchanged, and the amplitude of the modulated wave signal in the third tactile drive signal corresponding to each of the multiple fourth positions gradually decreases in the direction away from the first position.

[0130] Alternatively, the multiple second positions include multiple third positions located before the second position, and multiple fourth positions located after the second position, and the amplitude of the modulated wave signal in the third tactile drive signal corresponding to each of the multiple third positions gradually increases toward the direction approaching the first position, and the amplitude of the modulated wave signal in the third tactile drive signal corresponding to each of the multiple third positions gradually decreases toward the direction away from the first position.

[0131] In one embodiment, the amplitude of the modulated wave signal in the third tactile drive signal corresponding to each of the plurality of third positions increases in a direction approaching the first position according to a first slope or a first sinusoidal function.

[0132] The amplitude of the modulated wave signal in the third tactile drive signal corresponding to each of the plurality of third positions may increase according to the first slope or the first sinusoidal function as it approaches the first position.

[0133] Among them, the spacing distance between the third position closest to the first position among the multiple third positions can be larger. If it is greater than the spacing distance between the third positions, the multiple third positions can be farther away from the first position as a whole, as shown in Figures 11 and 6, so that within a smaller distance at the beginning of sliding to the first position, the amplitude of the third tactile drive signal increases successively, and switches to the second tactile drive signal when it increases to a certain amplitude. Thus, the amplitude of the second tactile drive signal can be obtained in a shorter time.

[0134] It should be noted that the change speed of the third tactile drive signal is related to the sliding speed of the sliding icon. For example, the faster the sliding speed, the faster the change speed of the third tactile drive signal. For example, the slower the sliding speed, the slower the change speed of the third tactile drive signal.

[0135] The first slope may be a fixed slope, and its slope value may be determined according to the interval distance between the maximum amplitude and the third position. In practice, it may be determined according to demand, for example, it may be within the range of 0.3-0.7.

[0136] In one embodiment, the amplitude of the modulated wave signal in the third tactile drive signal corresponding to each of the plurality of fourth positions decreases in a direction away from the first position according to a second slope or a second sinusoidal function.

[0137] In this embodiment, the amplitude of the modulated wave signal in the third haptic drive signal corresponding to each of the plurality of fourth positions decreases according to a second slope or a second sinusoidal function in a direction away from the first position.

[0138] Among them, the spacing distance between the fourth position closest to the first position among the multiple fourth positions can be larger. If it is greater than the spacing distance between the fourth positions, the multiple fourth positions can be farther away from the first position as a whole, as shown in Figures 11 and 6, so that within a longer distance in the initial stage of sliding in the direction away from the first position, the amplitude of the third tactile drive signal decreases successively, and switches to the third tactile drive signal when it decreases to a certain amplitude. Thus, the amplitude of the first tactile drive signal can be obtained in a shorter time.

[0139] It should be noted that the change speed of the third tactile drive signal is related to the sliding speed of the sliding icon. For example, the faster the sliding speed, the faster the change speed of the third tactile drive signal. For example, the slower the sliding speed, the slower the change speed of the third tactile drive signal.

[0140] The first slope may be a fixed slope, and its slope value may be determined according to the interval distance between the maximum amplitude and the third position. In practice, it may be determined according to demand, for example, it may be within the range of 0.3-0.7.

[0141] For example, as shown in Figures 11 and 12, Figure 11 shows a third switching schematic diagram of the tactile drive signal of the display module in an embodiment of the present disclosure. Combined with Figures 4 and 5, it can be seen from Figure 11 that the tactile drive signal V(t) in Figure 11 is composed of a modulated wave signal F1(t) and a carrier signal Q(t), wherein the carrier signal Q(t) is divided into two sections, namely a first carrier signal Q1(t) and a second carrier signal Q2(t). The first carrier signal Q1 is the carrier signal in the first tactile drive signal, and the second carrier signal Q2 is the carrier signal in the second tactile drive signal. The first carrier signal Q1(t) and the second carrier signal Q2(t) are both sinusoidal waves with equal amplitudes and frequencies f1 and f2, respectively. The first carrier signal Q1(t) corresponds to the characteristic mode Z1, and the second carrier signal Q2(t) corresponds to the characteristic mode Z2. The modulated wave signal F1 in Figure 11 is not a constant value, but changes linearly in a specific time period.

[0142] Haptic drive signal: V(t) = F1(t) * Q(t);

[0143] Modulation wave signal F1(t):

[0144] Carrier signal Q(t):

[0145] Wherein, the first tactile driving signal V1(t)=Q1(t)*F1(t); the second tactile driving signal V2(t)=Q2(t)*F1(t); Q1(t)=sin(2πf1t); Q2(t)=sin(2πf2t); wherein Δt3≤t≤Δt-Δt4;

[0146] Among them, the third tactile drive signal V3(t)=Q3(t)*F1(t), Q3(t)=Q1(t), Δt-Δt4≤t≤Δt or V3(t)=Q3(t)*F1(t), Q3(t)=Q2(t), Δt1+Δt2=Δt.

[0147] As can be seen from Figure 12, Figure 12 shows a fourth switching schematic diagram of the tactile drive signal of the display module in the embodiment of the present disclosure. The tactile drive signal V(t) in Figure 12 is composed of a modulated wave signal F1(t) and a carrier signal Q(t), wherein the carrier signal Q(t) is divided into two sections, namely the first carrier signal Q1(t) and the second carrier signal Q2(t). The first carrier signal Q1(t) and the second carrier signal Q2(t) are both sinusoidal waves with equal amplitudes, and the frequencies are carrier signals of f1 and f2 respectively. The first carrier signal Q1(t) corresponds to the characteristic mode Z1, and the second carrier signal Q2(t) corresponds to the characteristic mode Z2. The modulated wave signal F1 in Figure 12 is not a constant value, and changes in a sinusoidal wave in a specific time period.

[0148] Haptic drive signal: V(t) = F1(t) * Q(t);

[0149] Modulation wave signal F1(t):

[0150] Carrier signal Q(t):

[0151] Among them, the first tactile drive signal V1(t)=Q1(t)*F1(t); the second tactile drive signal V2(t)=Q2(t)*F1(t); Q1(t)=sin(2πf1t); Q2(t)=sin(2πf2t); among them, Δt3≤t≤Δt-Δt4.

[0152] Among them, the third tactile drive signal V3(t)=Q3(t)*F1(t), Q3(t)=Q1(t), Δt-Δt4≤t≤Δt or V3(t)=Q3(t)*F1(t), Q3(t)=Q2(t), Δt1+Δt2=Δt.

[0153] 11 and 12 , the dividing point between Δt1 and Δt2 in the figures is the first position, and the amplitude of the modulated wave signal in the third tactile drive signal corresponding to the second position close to the first position is greater than the amplitude of the modulated wave signal in the third tactile drive signal corresponding to the second position far from the first position.

[0154] Assuming that the dividing point between Δt1 and Δt2 in the figure is the first position, assuming that the multiple positions in Δt3 are the third position, the maximum amplitude point corresponding to Δt3 is the second position, and the multiple positions in Δt4 are the fourth position, the maximum amplitude point corresponding to Δt4 is the second position. It can be seen from the figure that the amplitude of the modulated wave signal in the third tactile drive signal corresponding to each of the multiple third positions gradually increases toward the first position; and / or the amplitude of the modulated wave signal in the third tactile drive signal corresponding to each of the multiple fourth positions gradually decreases toward the direction away from the first position.

[0155] Since the amplitude of the modulated wave signal in the second tactile drive signal increases linearly according to the first slope within the first preset time length, and the amplitude of the modulated wave signal in the first tactile drive signal decreases linearly according to the second slope within the second preset time length, Δt3 and Δt4 may be equal or unequal, and Δt3<Δt1, Δt4<Δt2. If Δt3 and Δt4 are equal, the modulated wave signal in Figure 11 is a straight line with a fixed slope within the end Δt4 time, and the amplitude of the modulated wave signal changes gradually within the end Δt4 time. The gradually decreasing amplitude of the modulated wave signal can also effectively reduce the noise of the device. Therefore, in Figure 11, the amplitude of the modulated wave signal in the third tactile drive signal corresponding to each of the multiple fourth positions decreases according to the second slope in the direction away from the first position, or decreases according to the first sine function in Figure 12.

[0156] In addition, since the amplitudes of the modulated wave signals carried by the third tactile driving signals corresponding to different second positions are different, the actuating element vibrates with different amplitudes corresponding to different second positions. A specific embodiment will be described below.

[0157] For example, assume a virtual switch controls two switch modes of a device, wherein a first tactile drive signal indicates maintaining the first switch mode, a second tactile drive signal indicates maintaining the second switch mode, and a third tactile drive signal indicates turning off the first switch mode and turning on the second switch mode. The second positions are respectively set before and after the first position. Therefore, the entire process of switching the device from activating the second switch mode to the first switch mode and then turning off the first switch mode is as follows: if the first position is the middle position of the virtual switch, the sliding icon is slid from left to right until it reaches the first second position, activating the second switch mode. After activation is complete, that is, after passing the second position, the second tactile drive signal is switched to maintain the second switch mode. The device then continues to move toward the first position. When it reaches the first position, the second tactile drive signal is switched to the first tactile drive signal, and the controller outputs the first tactile drive signal to activate the first switch mode. To deactivate the first switch mode, the device continues to slide toward the rear end of the first position until it reaches the second second position. At this point, the controller generates a third tactile drive signal to act on the actuator to deactivate the first switch mode.

[0158] In one embodiment, a difference between a maximum amplitude corresponding to the plurality of third haptic drive signals and an amplitude of a modulated wave signal in the first haptic drive signal is smaller than a preset difference.

[0159] In this embodiment, the maximum amplitude refers to the maximum amplitude that can drive the vibration element to vibrate under the third tactile drive signal, and the preset difference refers to the amplitude difference in order to ensure smoother switching between the third tactile drive signal and the first tactile drive signal. Generally speaking, the maximum amplitude of the modulated wave signal corresponding to the third tactile drive signal is theoretically equal to the amplitude of the modulated wave signal in the first tactile drive signal. In practice, there are interferences from other irresistible factors, and it is sufficient as long as it is within the error range.

[0160] 11 and 12 , the maximum amplitudes corresponding to the third haptic drive signals are almost equal to the amplitude of the modulated wave signal in the first haptic drive signal, thereby making the switching between the third haptic drive signals and the first haptic drive signal smoother.

[0161] In one embodiment, the third haptic drive signals corresponding to different second positions carry the same carrier signal.

[0162] In this embodiment, referring to the above embodiment and combining FIG. 11 and FIG. 12 , it can be seen that since the second position is at different positions, either before or after the first position, if the third tactile drive signals corresponding to the second positions play the same role, then the third tactile drive signals corresponding to different second positions can carry the same carrier signal.

[0163] In one embodiment, the controller is further configured to switch the tactile drive signal to a fourth tactile drive signal and the first tactile drive signal when the touch body slides to the first position; wherein the frequency of the carrier signal in the fourth tactile drive signal gradually increases, and the difference between the highest frequency of the carrier signal in the fourth tactile drive signal and the highest frequency of the carrier signal in the first tactile drive signal is less than a preset frequency difference.

[0164] In this embodiment, the controller is further configured to switch the tactile drive signal to a fourth tactile drive signal and the first tactile drive signal when the touch body slides to the first position; wherein the frequency of the carrier signal in the fourth tactile drive signal gradually increases, and the difference between the highest frequency of the carrier signal in the fourth tactile drive signal and the highest frequency of the carrier signal in the first tactile drive signal is less than a preset frequency difference.

[0165] For example, in this embodiment, referring to Figure 13, Figure 13 shows a fifth switching schematic diagram of the tactile drive signal of the display module in the embodiment of the present disclosure. Combined with Figures 4 and 5, it can be seen from Figure 13 that the fifth tactile drive signal V(t) is composed of a modulated wave signal F1(t) and a carrier signal Q(t), wherein the carrier signal Q(t) is divided into three segments, namely, a first carrier signal Q1(t), a second carrier signal Q2(t) and a fourth carrier signal Q4(t). The first carrier signal Q1 is the carrier signal in the first tactile drive signal, the second carrier signal Q2 is the carrier signal in the second tactile drive signal, and the fourth carrier signal Q4(t) is the carrier signal in the fourth tactile drive signal.

[0166] Among them, the first carrier signal Q1(t) and the second carrier signal Q2(t) are both sinusoidal waves with equal amplitudes, and the frequencies are f1 and f2 respectively. The first carrier signal Q1(t) corresponds to the characteristic mode Z1, the second carrier signal Q2(t) corresponds to the characteristic mode Z2, the fourth carrier signal Q4(t) is a chirp function, and the modulated wave signal F1 is not a constant value.

[0167] Haptic drive signal: V(t) = F1(t) * Q(t);

[0168] Modulation wave signal F1(t):

[0169] Carrier signal Q(t):

[0170] Wherein, the first tactile driving signal V1(t)=Q1(t)*F1(t); the second tactile driving signal V2(t)=Q2(t)*F1(t); the fourth tactile driving signal V4(t)=Q4(t)*F1(t); Q1(t)=sin(2πf1t); Q2(t)=sin(2πf2t+π); Δt1+Δt2=Δt.

[0171] As shown in FIG. 13 , the carrier signal is divided into three segments. During the intermediate time period Δt5, the fourth tactile drive signal V3(t) is a chirp function. Since the frequency of the carrier signal gradually switches from one characteristic frequency f1 to another characteristic frequency f2, the structural formation also gradually switches from Z1 to Z2. At this time, the change in the virtual switch lateral force also gradually changes. However, during the switching process, the second tactile drive signal V2(t) switches to the third tactile drive signal V3(t), and then switches to the first tactile drive signal V1(t), completing the switch from the second tactile drive signal V2(t) to the first tactile drive signal V1(t). Therefore, when the touch-sensitive body slides to the first position, the tactile drive signal switches between the fourth tactile drive signal and the first tactile drive signal. Specifically, during the switching process, the virtual switch lateral force also gradually changes. This is because the frequency of the carrier signal in the fourth tactile drive signal gradually increases, and the difference between the highest frequency of the carrier signal in the fourth tactile drive signal and the highest frequency of the carrier signal in the first tactile drive signal is less than the preset frequency difference.

[0172] Therefore, the fourth tactile drive signal V3(t) can be used to adjust the tactile sensation during signal switching. The fourth tactile drive signal is used as a transition signal between the second tactile drive signal and the first tactile drive signal, so that the tactile sensation transmitted to the user's finger during the switching process is closer to that of sliding a real mechanical switch.

[0173] In addition, the Chirp function is a commonly used function in signal processing. It can be used to generate a linear frequency modulation signal within a specific frequency range, which can make the signal frequency change from f1 to f2 more smoothly. Even when the second tactile drive signal switches to the first tactile drive signal, the tactile feeling fed back to the user is smoother.

[0174] In one embodiment, the haptic driving signal causes the amplitude of the actuating element in a normal direction of the display substrate to be greater than or equal to 1 μm.

[0175] In this embodiment, as can be seen from Figures 8 to 13, the tactile driving signal causes the amplitude of the actuator in the normal direction of the display substrate to be greater than or equal to 1 μm. This is to ensure that when the amplitude of the carrier signal is adjusted, the friction coefficient between the display component and the touch-sensitive body can be adjusted. The tactile driving signal can be the first tactile driving signal, the second tactile driving signal, or the fourth tactile driving signal.

[0176] In one embodiment, the display assembly includes a display substrate including 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.

[0177] In this embodiment, referring to FIG. 14 , FIG. 14 shows a detailed schematic diagram of the functional modules of the display module in the embodiment of the present disclosure. In FIG. 14 , the display assembly includes a display substrate, which includes a display area. The display area is used to display a virtual switch, and the actuator may be located on a side of the display substrate away from the display area. Alternatively, the actuator may be located within the display substrate and close to the display area. As long as it can be ensured that the actuator is vibrated by a tactile drive signal, it can drive the display area to resonate and change the friction coefficient between the display area and the touch-sensitive body.

[0178] In one embodiment, the actuating element includes a plurality of sub-vibration elements, which are distributed at intervals; wherein, the display module further includes a control component, which is configured to detect the target display position of the virtual switch and transmit the drive signal to at least one sub-vibration element at the target display position, so that the sub-vibration element at the target display position vibrates in response to the tactile drive signal.

[0179] In this embodiment, the actuator includes a plurality of sub-vibration elements, which are spaced apart. The display module further includes a control component configured to detect the target display position of the virtual switch and transmit a drive signal to at least one sub-vibration element at the target display position, so that the sub-vibration element at the target display position vibrates in response to the tactile drive signal, thereby changing the friction coefficient between the display area and the touch body. The target display position is the position of the touch body.

[0180] The touch feedback process of the display device is described in detail below with reference to specific scenarios and FIG11 and FIG6 :

[0181] The virtual switch includes a first switch mode and a second switch mode, wherein the first switch mode corresponds to on, the second switch mode corresponds to off, and the first position is the middle position of the virtual switch; as shown in FIG6 ;

[0182] The actuating element includes a plurality of sub-vibration elements, which are located on a side of the display substrate away from the display area. When a user (touch body) touches the sliding button of the virtual switch on the display component, the touch component detects that the touch body slides from the left to the right in the virtual switch. When the touch body is in a third position before the first position, as the third position of the touch body approaches the first position, the controller generates a third tactile drive signal with an amplitude that increases sequentially according to the first slope. Each third tactile drive signal acts on a sub-vibration element (located at the virtual control) in the actuating element. The sub-vibration element vibrates, giving the user a certain tactile feedback, so that the user knows that the first switch mode has been successfully started. It is assumed that the duration of the third tactile drive signal corresponds to the Δt3 time period in Figure 11.

[0183] As the user continues to slide the sliding icon of the virtual switch, after going through all the third positions, it switches to the second tactile drive signal, that is, the second tactile drive signal is the third tactile drive signal corresponding to the last third position, which continues the second tactile drive signal. At this time, the vibration amplitude generated by the actuator is large; the duration of the second tactile drive signal corresponds to the Δt1-Δt3 time period in Figure 11.

[0184] Next, when it is detected that the touch body has slid to the first position, the control is switched from the second tactile drive signal to the first tactile drive signal, wherein the frequency of the second tactile drive signal is lower than the frequency of the first tactile drive signal, and the two have opposite phases, thereby changing the friction coefficient between the display component and the touch body, causing the actuator to leave the resonant mode. Specifically, the friction coefficient between the display component and the touch body is increased, so that the user perceives an increase in lateral force here, and knows that the switch from the first switching mode to the second switching mode is successful. The duration of the first tactile drive signal corresponds to the Δt2-Δt4 time period in Figure 11.

[0185] If the device continues to move after reaching the first position and reaches the fourth position, the controller outputs a third haptic drive signal. As the fourth position moves away from the first position, the amplitude of the third haptic drive signal decreases, such as decreasing according to the second slope, until it reaches zero amplitude, thereby eliminating the vibration. The duration of the third haptic drive signal after the first position is the Δt4 period in Figure 11.

[0186] Based on the same inventive concept, the present disclosure further provides a touch feedback method. Referring to FIG. 15 , FIG. 15 shows a flowchart of the steps of the touch feedback method in an embodiment of the present disclosure, which is applied to a display module configured with a display component. The method steps include:

[0187] Step S141 : Detecting the position of the touch object in the virtual switch.

[0188] In this embodiment, the position of the touch object within the virtual switch is first detected and the position information is fed back to the controller. The touch object can be a user's finger or a stylus that supports virtual switch recognition. Specifically, the position information is fed back based on the final stop position of the touch component after being dragged by the contact element, so that the controller can know the position of the touch object within the virtual switch.

[0189] Step S142 : When the position indicates that the touch-sensitive object slides to the first position of the virtual switch, switching the tactile driving signal to a first tactile driving signal.

[0190] In this embodiment, if the position indicates that the touch-sensitive body slides to the first position of the virtual switch, since the first position corresponds to the first haptic driving signal, the haptic driving signal needs to be switched to the first haptic driving signal.

[0191] Step S143: outputting the first tactile driving signal to the actuator to change the friction coefficient between the display component and the touch body; wherein the position of the first position in the virtual switch corresponds to different switching modes of the virtual switch.

[0192] In this embodiment, the controller outputs a first tactile drive signal to the actuator element, which generates vibrations, driving the display component to resonate, thereby changing the friction coefficient between the display component and the touch body. Since the position of the first position in the virtual switch corresponds to different switching modes of the virtual switch, as the touch component moves in the virtual switch, its position changes, and the tactile drive signal can generate a tactile drive signal corresponding to each position according to the position change. The tactile drive signal generated at different positions can be different, for example, different in phase, frequency, amplitude, and duration, simulating the tactile mode of a real mechanical switch. As a result, when the user drags the touch component, he or she can feel different degrees of resonant feedback according to directly dragging the touch component to move in the virtual switch. This resonant feedback is the same as the tactile feeling of operating a real mechanical switch.

[0193] In one embodiment, the method further includes: when detecting that the touch body slides before the first position and / or slides after the first position, generating a third tactile drive signal adapted to the second position according to the second position of the touch body; applying the third tactile drive signal to the actuator element; wherein the amplitude of the modulated wave signal carried by the third tactile drive signal corresponding to different second positions is different, so that the actuator element vibrates with different amplitudes at different second positions.

[0194] In this embodiment, referring to Figures 11 and 12, since the amplitude of the modulated wave signal carried by the third tactile drive signal corresponding to different second positions is different, the actuator element vibrates with different amplitudes corresponding to different second positions. Therefore, when it is detected that the touch body slides before the first position and / or slides after the first position, a third tactile drive signal adapted to the second position is generated according to the second position of the touch body; the third tactile drive signal is applied to the actuator element, further changing the friction coefficient between the display component and the touch body, thereby adding a new resonant feedback tactile sensation to the user.

[0195] In this embodiment, the second haptic drive signal and the first haptic drive signal differ at least in the number of wave nodes.

[0196] In this embodiment, there is a phase difference between the second haptic driving signal and the first haptic driving signal.

[0197] In this embodiment, the phase difference is 180 degrees.

[0198] In this embodiment, the frequencies of carrier signals carried by the second haptic drive signal and the first haptic drive signal are different.

[0199] In this embodiment, the virtual switch includes a middle position, and both sides of the middle position correspond to different switch modes respectively; wherein the first position is the middle position and any position located on both sides of the middle position.

[0200] In this embodiment, the controller is further configured to generate a third tactile drive signal adapted to the second position according to the second position of the touch body when the touch body slides before the first position and / or slides after the first position, and apply the third tactile drive signal to the actuator element; wherein the amplitude of the modulated wave signal carried by the third tactile drive signal corresponding to different second positions is different, so that the actuator element vibrates with different amplitudes at different second positions.

[0201] In this embodiment, the third haptic drive signals corresponding to different second positions carry the same carrier signal.

[0202] In this embodiment, the amplitude of the modulated wave signal in the third haptic drive signal corresponding to the second position close to the first position is greater than the amplitude of the modulated wave signal in the third haptic drive signal corresponding to the second position far from the first position.

[0203] In this embodiment, the multiple second positions include multiple third positions located before the second position, and multiple fourth positions located after the second position, wherein the amplitude of the modulated wave signal in the third tactile drive signal corresponding to each of the multiple third positions gradually increases toward the direction approaching the first position; and / or the amplitude of the modulated wave signal in the third tactile drive signal corresponding to each of the multiple fourth positions gradually decreases toward the direction away from the first position.

[0204] In this embodiment, the amplitude of the modulated wave signal in the third haptic drive signal corresponding to each of the plurality of third positions increases according to a first slope or a first sinusoidal function as it approaches the first position.

[0205] In this embodiment, the amplitude of the modulated wave signal in the third haptic drive signal corresponding to each of the plurality of fourth positions decreases in a direction away from the first position according to a second slope or a second sinusoidal function.

[0206] In this embodiment, a difference between a maximum amplitude corresponding to the plurality of third haptic drive signals and an amplitude of the modulated wave signal in the first haptic drive signal is smaller than a preset difference.

[0207] In this embodiment, the controller is further configured to switch the tactile drive signal to a fourth tactile drive signal and the first tactile drive signal when the touch body slides to the first position; wherein the frequency of the carrier signal in the fourth tactile drive signal gradually increases, and the difference between the highest frequency of the carrier signal in the fourth tactile drive signal and the highest frequency of the carrier signal in the first tactile drive signal is less than a preset frequency difference.

[0208] In this embodiment, the haptic driving signal causes the amplitude of the actuating element in the normal direction of the display substrate to be greater than or equal to 1 μm.

[0209] In this embodiment, the display component 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 is arranged close to the display area.

[0210] In this embodiment, the actuating element includes a plurality of sub-vibration elements, which are distributed at intervals; wherein, the display module also includes a control component, which is configured to detect the target display position of the virtual switch and transmit the drive signal to at least one sub-vibration element at the target display position, so that the sub-vibration element at the target display position vibrates in response to the tactile drive signal.

[0211] In a third aspect of the present disclosure, an electronic device is provided, which includes the display module described in the first aspect of the present disclosure; or, the electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the touch feedback method described in the second aspect of the present disclosure is implemented.

[0212] 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.

[0213] 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.

[0214] The display module, touch feedback method, and electronic device 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 contents of this specification should not be understood as limiting the present disclosure.

[0215] 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.

[0216] 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.

[0217] 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.

[0218] 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.

[0219] 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 one and 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.

[0220] 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 module, characterized in that, Comprising: A display component, a touch component, and a haptic feedback component. The haptic feedback component includes a controller and an actuating element. Among them, The display component includes a display virtual switch; The touch component is configured to detect the position of a touch body in the virtual switch and feedback the position information to the controller; The controller is configured to switch the haptic drive signal to a first haptic drive signal when the position information indicates that the touch body slides to a first position of the virtual switch, and output the first haptic drive signal to the actuating element to change the friction coefficient between the display component and the touch body; Among them, the position of the first position in the virtual switch corresponds to different switch modes of the virtual switch.

2. The display module according to claim 1, wherein The controller is further configured to generate a second haptic drive signal when the position information indicates the position before the touch body slides to the first position, and switch the second haptic drive signal to the first haptic drive signal when the touch body slides to the first position; Among them, the waveform corresponding to the first haptic drive signal is different from the waveform corresponding to the second haptic drive signal.

3. The display module according to claim 2, wherein There is at least a difference in the number of wave nodes between the second haptic drive signal and the first haptic drive signal.

4. The display module according to claim 2, wherein There is a phase difference between the second haptic drive signal and the first haptic drive signal.

5. The display module according to claim 4, wherein The phase difference is 180 degrees.

6. The display module according to claim 2, wherein, The frequencies of the carrier signals carried by the second haptic drive signal and the first haptic drive signal are different from each other.

7. The display module according to claim 1, wherein The virtual switch includes an intermediate position, and different switch modes are respectively corresponding to both sides of the intermediate position; Among them, the first position is any one of the intermediate position and the positions on both sides of the intermediate position.

8. The display module according to claim 1, wherein The controller is further configured to generate a third haptic drive signal adapted to the second position according to the second position where the touch body is located when the touch body slides before and / or after the first position, and act the third haptic drive signal on the actuating element; Among them, the amplitudes of the modulation wave signals carried by the third haptic drive signals corresponding to different second positions are different, so that the actuating element vibrates with different amplitudes corresponding to different second positions.

9. The display module according to claim 8, wherein The third haptic drive signals corresponding to different second positions carry the same carrier signal.

10. The display module according to claim 8, wherein The amplitude of the modulation wave signal in the third haptic drive signal corresponding to the second position close to the first position is greater than the amplitude of the modulation wave signal in the third haptic drive signal corresponding to the second position far from the first position.

11. The display module according to claim 8, wherein, The multiple second positions include multiple third positions before the second position and multiple fourth positions after the second position; Among them, the amplitudes of the modulation wave signals in the third haptic drive signals respectively corresponding to the multiple third positions gradually increase in the direction approaching the first position; and / or, the amplitudes of the modulation wave signals in the third haptic drive signals respectively corresponding to the multiple fourth positions gradually decrease in the direction away from the first position.

12. The display module according to claim 11, wherein The amplitude of the modulated wave signal in the third tactile drive signal corresponding to each of the plurality of third positions increases in a direction approaching the first position according to a first slope or a first sinusoidal function.

13. The display module according to claim 11 or 12, characterized in that, The amplitude of the modulated wave signal in the third tactile drive signal corresponding to each of the plurality of fourth positions decreases in a direction away from the first position according to a second slope or a second sinusoidal function.

14. The display module according to claim 8, wherein A difference between a maximum amplitude corresponding to the plurality of third tactile driving signals and an amplitude of a modulated wave signal in the first tactile driving signal is smaller than a preset difference.

15. The display module according to claim 1, wherein The controller is further configured to switch the tactile driving signal to a fourth tactile driving signal and the first tactile driving signal when the touch-sensitive body slides to the first position; The frequency of the carrier signal in the fourth haptic drive signal gradually increases, and a difference between a maximum frequency of the carrier signal in the fourth haptic drive signal and a maximum frequency of the carrier signal in the first haptic drive signal is smaller than a preset frequency difference.

16. The display module according to any one of claims 1-12, characterized in that, The haptic driving signal causes the amplitude of the actuating element in a normal direction of the display substrate to be greater than or equal to 1 μm.

17. The display module according to claim 1, wherein The display assembly 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.

18. The display module according to claim 17, wherein The actuating element comprises a plurality of sub-vibration elements, and the plurality of sub-vibration elements are distributed at intervals; The display module also includes a control component, which is configured to detect a target display position of the virtual switch and transmit the drive signal to at least one sub-vibration element at the target display position so that the sub-vibration element at the target display position vibrates in response to the tactile drive signal.

19. A touch feedback method, characterized in that, Applied to a display module, the display module is configured with a display component, and the method includes: Detecting the position of the touch body in the virtual switch; When the position indicates that the touch-sensitive body slides to the first position of the virtual switch, switching the tactile driving signal to a first tactile driving signal; Outputting the first tactile driving signal to the actuating element to change the friction coefficient between the display component and the touch-sensitive body; The position of the first position in the virtual switch corresponds to different switching modes of the virtual switch.

20. The touch feedback method according to claim 19, wherein The method further comprises: It is detected that the touch body slides before the first position and / or slides after the first position. When the touch-sensitive body is in motion, a third tactile driving signal adapted to the second position is generated according to the second position of the touch-sensitive body; Applying the third tactile driving signal to the actuating element; The amplitudes of the modulated wave signals carried by the third tactile driving signals corresponding to different second positions are different, so that the actuating element vibrates with different amplitudes corresponding to different second positions.

21. An electronic device, characterized in that, The electronic device includes the display module according to any one of claims 1-18; or, the electronic device includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and when the processor executes the computer program, the touch feedback method according to claim 19 or 20 is implemented.

Images