Haptic feedback assembly and haptic feedback device

Abstract

Embodiments of the present disclosure provide a haptic feedback assembly and a haptic feedback device. The haptic feedback assembly comprises: a flexible circuit board, wherein the flexible circuit board comprises a flexible substrate, a first metal layer arranged on the side of a first surface of the flexible substrate, and a second metal layer arranged on the side of a second surface of the flexible substrate, and the first surface and the second surface are oppositely arranged in the thickness direction of the flexible substrate; and a plurality of piezoelectric actuators, arranged on the side of the first metal layer away from the flexible substrate, wherein the piezoelectric actuators are electrically connected to the first metal layer, the first metal layer is electrically connected to the second metal layer by means of a via hole running through the flexible substrate, the second metal layer is electrically connected to an external driving circuit, and the piezoelectric actuators are configured to generate haptic feedback in response to a driving signal input by the external driving circuit.

Description

Tactile feedback component and tactile feedback device Technical Field

[0001] The present disclosure relates to the technical field of tactile feedback, and in particular to a tactile feedback component and a tactile feedback device. Background Art

[0002] Haptics is a key area of ​​current technological development. Specifically, haptics enables devices to interact with the human body through touch.

[0003] Summary of the Invention

[0004] The present disclosure provides a tactile feedback component and a tactile feedback device, and the specific solutions are as follows:

[0005] An embodiment of the present disclosure provides a tactile feedback component, comprising:

[0006] A flexible circuit board, comprising: a flexible substrate, a first metal layer disposed on one side of a first surface of the flexible substrate, and a second metal layer disposed on one side of a second surface of the flexible substrate; wherein the first surface and the second surface are disposed opposite each other along a thickness direction of the flexible substrate;

[0007] Multiple piezoelectric actuators are arranged on a side of the first metal layer facing away from the flexible substrate, the piezoelectric actuators are electrically connected to the first metal layer, the first metal layer is electrically connected to the second metal layer through vias penetrating the flexible substrate, and the second metal layer is electrically connected to an external drive circuit; the piezoelectric actuators are configured to generate tactile feedback in response to a drive signal input by the external drive circuit.

[0008] In a possible implementation, in the tactile feedback assembly provided in an embodiment of the present disclosure, a side of the piezoelectric actuator facing the flexible circuit board has a positive electrode lead structure and a negative electrode lead structure;

[0009] The first metal layer includes multiple positive electrode pads, multiple negative electrode pads, positive electrode traces and negative electrode traces. The positive electrode lead-out structure is electrically connected to the positive electrode pads, the negative electrode lead-out structure is electrically connected to the negative electrode pads, the positive electrode pads are electrically connected to the positive electrode traces, and the negative electrode pads are electrically connected to the negative electrode traces.

[0010] In a possible implementation, in the above-mentioned tactile feedback component provided in an embodiment of the present disclosure, the second metal layer includes a positive lead wire, a negative lead wire, a positive input pad and a negative input pad, the positive lead wire is electrically connected to the positive lead wire, the negative lead wire is electrically connected to the negative lead wire, the positive lead wire is electrically connected to the positive input pad, the positive input pad is electrically connected to the external drive circuit, the negative lead wire is electrically connected to the negative input pad, and the negative input pad is electrically connected to the external drive circuit.

[0011] In a possible implementation, in the above-mentioned tactile feedback component provided by an embodiment of the present disclosure, the multiple positive electrode pads are arranged in sequence on the first surface of the flexible substrate along the length direction of the flexible substrate, and the multiple negative electrode pads are arranged in sequence on the first surface of the flexible substrate along the length direction of the flexible substrate.

[0012] In a possible implementation, in the tactile feedback component provided in the embodiment of the present disclosure, the multiple positive electrode pads and the multiple negative electrode pads are located in different rows and arranged in parallel, or the multiple positive electrode pads and the multiple negative electrode pads are located in the same row.

[0013] In a possible implementation, in the tactile feedback component provided in an embodiment of the present disclosure, the positive electrode pads and the negative electrode pads are staggered along the length direction of the flexible substrate, and each of the piezoelectric actuators covers an adjacent positive electrode pad and a negative electrode pad.

[0014] In a possible implementation, in the tactile feedback assembly provided in an embodiment of the present disclosure, the positive input pad and the negative input pad are located at the same end of the flexible substrate.

[0015] In a possible implementation, in the tactile feedback assembly provided in an embodiment of the present disclosure, all of the negative electrode pads are electrically connected to the same negative electrode trace, one end of the negative electrode trace close to the negative electrode input pad is electrically connected to one end of the negative electrode lead wire through a via hole penetrating the flexible substrate, and the other end of the negative electrode lead wire extends along the length direction of the flexible substrate to be electrically connected to the negative electrode input pad.

[0016] In one possible implementation, in the tactile feedback assembly provided in an embodiment of the present disclosure, all of the positive electrode pads are electrically connected to the same positive electrode trace, one end of the positive electrode trace close to the positive electrode input pad is electrically connected to one end of the positive electrode lead wire through a via hole penetrating the flexible substrate, and the other end of the positive electrode lead wire extends along the length direction of the flexible substrate to be electrically connected to the positive electrode input pad.

[0017] In a possible implementation, in the above-mentioned tactile feedback component provided in an embodiment of the present disclosure, the plurality of positive electrode pads are divided into at least two groups of positive electrode pads along the length direction of the flexible substrate, the positive electrode pads in each group are electrically connected to the same positive electrode trace, and the positive electrode pads in different groups are electrically connected to different negative electrode traces.

[0018] In a possible implementation, in the tactile feedback assembly provided in an embodiment of the present disclosure, the plurality of positive electrode pads are divided into a first group of positive electrode pads and a second group of positive electrode pads along the length direction of the flexible substrate, the positive electrode traces include a first positive electrode trace and a second positive electrode trace, the positive electrode lead wires include a first positive electrode lead wire and a second positive electrode lead wire, and the positive electrode input pads include a first positive electrode input pad and a second positive electrode input pad;

[0019] Each of the positive electrode pads in the first group of positive electrode pads is electrically connected to the first positive electrode trace, the first positive electrode trace is electrically connected to one end of the first positive electrode lead wire through a via hole penetrating the flexible substrate in a middle region of the flexible substrate, and the other end of the first positive electrode lead wire extends along the length direction of the flexible substrate to be electrically connected to the first positive electrode input pad;

[0020] Each of the positive electrode pads in the second group of positive electrode pads is electrically connected to the second positive electrode trace, and one end of the second positive electrode trace close to the positive electrode input pad is electrically connected to one end of the second positive electrode lead wire through a via hole penetrating the flexible substrate, and the other end of the second positive electrode lead wire extends along the length direction of the flexible substrate to be electrically connected to the second positive electrode input pad.

[0021] In a possible implementation, in the tactile feedback assembly provided by an embodiment of the present disclosure, the first positive input pad, the second positive input pad, and the negative input pad are arranged in sequence along the width direction of the flexible substrate.

[0022] In a possible implementation, in the tactile feedback component provided by an embodiment of the present disclosure, the width of the flexible substrate at the locations of the first positive input pad, the second positive input pad, and the negative input pad is greater than the width of the flexible substrate at other locations.

[0023] In one possible implementation, in the tactile feedback assembly provided in an embodiment of the present disclosure, a first positive electrode pad arranged along the length direction of the flexible substrate is electrically connected to one end of the positive electrode trace, and a last negative electrode pad arranged along the length direction of the flexible substrate is electrically connected to one end of the negative electrode trace;

[0024] The first metal layer further includes a plurality of series wires, and the preceding negative electrode pad and the following positive electrode pad along the length direction of the flexible substrate are electrically connected via the series wires.

[0025] In one possible implementation, in the tactile feedback assembly provided in an embodiment of the present disclosure, the other end of the positive electrode trace electrically connected to the first positive electrode pad is electrically connected to one end of the positive electrode lead wire at a middle position of the first piezoelectric actuator through a via hole penetrating the flexible substrate, and the other end of the positive electrode lead wire extends along the length direction of the flexible substrate to be electrically connected to the positive electrode input pad;

[0026] The other end of the negative electrode trace electrically connected to the last negative electrode pad is electrically connected to one end of the negative electrode lead wire through a via hole penetrating the flexible substrate, and the other end of the negative electrode lead wire extends along the length direction of the flexible substrate to be electrically connected to the negative electrode input pad.

[0027] In a possible implementation, in the tactile feedback assembly provided in an embodiment of the present disclosure, the shape of the piezoelectric actuator includes a rectangle or a circle.

[0028] In a possible implementation, in the tactile feedback assembly provided in the embodiment of the present disclosure, the structure of the piezoelectric actuator is a piezoelectric film or a piezoelectric ceramic block.

[0029] Correspondingly, an embodiment of the present disclosure further provides a tactile feedback device, comprising the tactile feedback component as described in any one of the above embodiments of the present disclosure.

[0030] In a possible implementation, the tactile feedback device provided in the embodiment of the present disclosure further includes a cover plate, and a surface of the piezoelectric actuator facing away from the flexible circuit board is in contact with a peripheral area of ​​the cover plate.

[0031] In a possible implementation, the tactile feedback device provided in the embodiment of the present disclosure further includes a display module, wherein the display module and the tactile feedback component are arranged on the same side of the cover plate, and the tactile feedback component is arranged on the cover plate on at least one side of the display module.

[0032] In one possible implementation, in the above-mentioned tactile feedback device provided in an embodiment of the present disclosure, the display module has a pair of long sides arranged opposite to each other and a pair of short sides connected to the pair of long sides, and the tactile feedback component is arranged between each of the long sides and the adjacent edge of the cover plate, and the extension direction of the long side of the tactile feedback component is the same as the extension direction of the long side of the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] FIG1 is a schematic diagram of the welding structure of a flexible circuit board and a piezoelectric actuator in a tactile feedback assembly provided by an embodiment of the present disclosure;

[0034] FIG2 is a schematic diagram of the planar structure of the piezoelectric actuator in FIG1 ;

[0035] FIG3A is a schematic plan view of the front and back surfaces of the flexible circuit board after the piezoelectric actuator is removed in FIG1 ;

[0036] FIG3B is a schematic diagram of the cross-sectional structure of the right end in FIG3A ;

[0037] FIG3C is an enlarged planar structural diagram of the flexible circuit board below the two piezoelectric actuators in FIG3A ;

[0038] FIG3D is an enlarged planar structural diagram of the right end in FIG3A ;

[0039] FIG4A is a schematic diagram of another planar structure of the front and back sides of the flexible circuit board provided by an embodiment of the present disclosure;

[0040] FIG4B is a schematic diagram of the planar structure of the back side of the flexible circuit board shown in FIG4A ;

[0041] FIG4C is an enlarged planar structural diagram of the right end in FIG4A ;

[0042] FIG4D is an enlarged schematic plan view of the middle area of ​​FIG4A ;

[0043] FIG5A is a schematic diagram of another planar structure of the front and back sides of the flexible circuit board provided by an embodiment of the present disclosure;

[0044] FIG5B is an enlarged planar structural diagram of the left end in FIG5A ;

[0045] FIG6 is a schematic diagram of another planar structure of the front and back sides of the flexible circuit board provided in an embodiment of the present disclosure;

[0046] FIG7A is a schematic diagram of another planar structure of the front and back sides of the flexible circuit board provided in an embodiment of the present disclosure;

[0047] FIG7B is an enlarged planar structural diagram of the left end in FIG7A ;

[0048] FIG7C is an enlarged planar structural diagram of the right end of FIG7A ;

[0049] FIG8 is a cross-sectional schematic diagram showing the positive electrode trace on the first surface of the flexible substrate 11 in FIG3A being electrically connected to the positive electrode lead on the second surface of the flexible substrate through a via hole penetrating the flexible substrate;

[0050] FIG9 is a schematic structural diagram of a tactile feedback device provided by an embodiment of the present disclosure;

[0051] FIG10 is a side view along the AA′ direction in FIG9 . DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. And in the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0053] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the usual meanings understood by persons of ordinary skill in the field to which this disclosure belongs. The words “include” or “comprise” and the like used in this disclosure mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The words “connect” or “connected” and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Inside”, “outside”, “upper”, “lower”, etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0054] It should be noted that the sizes and shapes of the figures in the accompanying drawings do not reflect the actual scale and are only for the purpose of illustrating the present disclosure. The same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions.

[0055] The multimodal fusion of vision, hearing, and touch is of great significance and value in enhancing operational safety and effectiveness and enriching user experience. Currently, visual and auditory presentation technologies are relatively mature and rich, but tactile feedback is not rich and realistic enough. Currently, fields such as mobile phones and wearable devices mainly generate vibration feedback through low-frequency vibrations of ERM and LRA. The effect is relatively simple and single, far from meeting user expectations. However, the use of piezoelectric transducers can generate auditory reminders through the action of sound excitation signals during human-computer interaction; use low-frequency vibration signals to generate vibration tactile feedback effects; the excitation signal of the ultrasonic segment generates a film squeeze effect to change the surface friction coefficient, and through waveform modulation, produce virtual surface tactile feedback effects similar to texture and freeze.

[0056] Currently, surface tactile display structures generally arrange piezoelectric actuators in the peripheral area of ​​the cover plate. The piezoelectric actuators are generally connected to an external drive circuit through wiring on the cover plate. The external drive circuit excites the piezoelectric actuator to vibrate and drive the cover plate to resonate to achieve tactile feedback. Since there are generally a large number of piezoelectric actuators, the conventional wire connection method of wiring on the cover plate will require a large number of wires, and in order to meet the maximum current requirements, thicker diameter wiring must be selected. However, the display assembly requirements generally do not have much space to place so many wirings. At the same time, because the piezoelectric actuator itself will drive vibration, too many wiring connections will generate unpredictable noise with the vibration, thus affecting the product's tactile experience.

[0057] In order to solve the problem that the frame of the existing surface tactile display structure does not have a lot of space to place the connection wiring of the piezoelectric actuator and that too many piezoelectric actuator connection wiring will generate noise with vibration, the embodiment of the present disclosure provides a tactile feedback component, as shown in Figures 1, 2, 3A, 3B, 3C, 3D, 4A, 4B, 4C, 4D, 5A, 5B, 6, 7A, 7B, and 7C. Figure 1 is a schematic diagram of the welding structure of the flexible circuit board and the piezoelectric actuator in the tactile feedback component provided by the embodiment of the present disclosure, Figure 2 is a schematic diagram of the planar structure of the piezoelectric actuator in Figure 1, Figure 3A is a schematic diagram of the planar structure of the front and back sides of the flexible circuit board after the piezoelectric actuator is removed in Figure 1, Figure 3B is a schematic diagram of the cross-sectional structure at the right end of Figure 3A, Figure 3C is an enlarged schematic diagram of the planar structure of the flexible circuit board under the two piezoelectric actuators in Figure 3A, and Figure 3D is a schematic diagram of the cross-sectional structure of the flexible circuit board under the two piezoelectric actuators in Figure 3A. 3A is an enlarged planar structural schematic diagram of the right end of FIG. 4A, FIG. 4A is a planar structural schematic diagram of another front and back sides of the flexible circuit board provided in an embodiment of the present disclosure, FIG. 4B is a planar structural schematic diagram of the back side of the flexible circuit board shown in FIG. 4A, FIG. 4C is an enlarged planar structural schematic diagram of the right end of FIG. 4A, FIG. 4D is an enlarged planar structural schematic diagram of the middle area of ​​FIG. 4A, FIG. 5A is a planar structural schematic diagram of another front and back sides of the flexible circuit board provided in an embodiment of the present disclosure, FIG. 5B is an enlarged planar structural schematic diagram of the left end of FIG. 5A, FIG. 6 is a planar structural schematic diagram of another front and back sides of the flexible circuit board provided in an embodiment of the present disclosure, FIG. 7A is a planar structural schematic diagram of another front and back sides of the flexible circuit board provided in an embodiment of the present disclosure, FIG. 7B is an enlarged planar structural schematic diagram of the left end of FIG. 7A, and FIG. 7C is an enlarged planar structural schematic diagram of the right end of FIG. 7A. The tactile feedback component includes:

[0058] A flexible circuit board (FPC) 1 includes a flexible substrate 11, a first metal layer 12 disposed on a first surface A of the flexible substrate 11, and a second metal layer 13 disposed on a second surface B of the flexible substrate 11. The first surface A and the second surface B are disposed opposite each other along the thickness direction of the flexible substrate 11.

[0059] Multiple piezoelectric actuators 2 are arranged on the side of the first metal layer 12 away from the flexible substrate 11. The piezoelectric actuators 2 are electrically connected to the first metal layer 12. The first metal layer 12 is electrically connected to the second metal layer 13 through vias penetrating the flexible substrate 11. The second metal layer 13 is electrically connected to an external driving circuit (PCB). The piezoelectric actuators 2 are configured to generate tactile feedback in response to a driving signal input by the external driving circuit (PCB).

[0060] The tactile feedback assembly provided in the embodiment of the present disclosure connects the piezoelectric actuator to an external PCB via an FPC. Since the FPC can have double-sided wiring, when the tactile feedback assembly of the present disclosure is integrated with a display or touch substrate, the space occupied by the wiring connecting the piezoelectric actuator in the border area of ​​the substrate can be reduced, thereby achieving a narrow border. In addition, by rationally arranging the way in which the piezoelectric actuator is connected to the PCB via wiring, the noise generated by the wiring as the piezoelectric actuator vibrates can also be reduced.

[0061] It should be noted that, for the purpose of schematic illustration, Figures 3A, 4A, 5A, 6 and 7A illustrate the first metal layer 12 on the first surface A of the flexible substrate 11 and the second metal layer 13 on the second surface B as being in the same plane. Of course, the actual structure is that the first metal layer 12 and the second metal layer 13 shown in Figure 3B are located on both sides of the flexible substrate 11.

[0062] It should be noted that the dotted boxes in FIG3A , FIG4A , FIG5A , FIG6 and FIG7A respectively demarcate the welding positions corresponding to the piezoelectric actuators 2 , that is, schematic diagrams of the areas occupied by the piezoelectric actuators 2 on the flexible circuit board 1 .

[0063] In some embodiments, in the above-mentioned tactile feedback component provided by the embodiments of the present disclosure, the material of the flexible substrate includes but is not limited to PI (polyimide), PMMA (polymethyl methacrylate), PC (polycarbonate), PET (Polyethylene terephthalate), PC / PMMA composite materials, and organic-inorganic composite materials.

[0064] In some embodiments, in the tactile feedback assembly provided by the embodiments of the present disclosure, as shown in FIG2 , the piezoelectric actuator 2 has a positive electrode lead structure 21 and a negative electrode lead structure 22 on one side facing the flexible circuit board 1 ;

[0065] As shown in Figures 3A, 4A, 5A, 6 and 7A, the first metal layer 12 includes multiple positive electrode pads 121, multiple negative electrode pads 122, positive electrode traces 123 and negative electrode traces 124. The positive electrode lead-out structure 21 in Figure 2 is electrically connected to the positive electrode pad 121 in Figures 3A, 4A, 5A, 6 and 7A, the negative electrode lead-out structure 22 in Figure 2 is electrically connected to the negative electrode pad 122 in Figures 3A, 4A, 5A, 6 and 7A, the positive electrode pad 121 is electrically connected to the positive electrode trace 123, and the negative electrode pad 122 is electrically connected to the negative electrode trace 124.

[0066] In some embodiments, in the above-mentioned tactile feedback component provided by the embodiments of the present disclosure, as shown in Figures 3A, 4A, 5A, 6 and 7A, the second metal layer 13 includes a positive lead wire 131, a negative lead wire 132, a positive input pad 133 and a negative input pad 134, the positive trace 123 is electrically connected to the positive lead wire 131, the negative trace 124 is electrically connected to the negative lead wire 132, the positive lead wire 131 is electrically connected to the positive input pad 133, the positive input pad 133 is electrically connected to the external drive circuit (PCB), the negative lead wire 132 is electrically connected to the negative input pad 134, and the negative input pad 134 is electrically connected to the external drive circuit (PCB). When integrating the haptic feedback assembly provided by the embodiments of the present disclosure with a display cover, since the side of the piezoelectric actuator 2 facing away from the flexible printed circuit board 1 is attached to the cover, the positive input pad 133 and the negative input pad 134 are positioned on the second surface B of the flexible printed circuit board 1, facing away from the piezoelectric actuator 2. This facilitates electrical connection of the positive input pad 133 and the negative input pad 134 to an external drive circuit (PCB). The positive lead structure 21 and the negative lead structure 22 of the piezoelectric actuator 2 are connected to the PCB via pads and traces on the first surface A of the FPC and lead wires and input pads on the second surface B of the FPC, respectively. The PCB inputs a drive signal to the piezoelectric actuator 2 via the input pads, lead wires, traces, and pads. The piezoelectric actuator 2 vibrates under the stimulation of the drive signal, generating tactile feedback.

[0067] In some embodiments, in the above-mentioned tactile feedback component provided by the embodiments of the present disclosure, as shown in Figures 3A, 4A, 5A, 6 and 7A, a plurality of positive electrode pads 121 are arranged in sequence on the first surface A of the flexible substrate 11 along the length direction of the flexible substrate 11, and a plurality of negative electrode pads 122 are arranged in sequence on the first surface A of the flexible substrate 11 along the length direction of the flexible substrate 11. In this way, when the piezoelectric actuator 2 shown in Figure 2 is correspondingly welded to the positive electrode pad 121 and the negative electrode pad 122, the piezoelectric actuators 2 are arranged in sequence along the length direction of the flexible substrate 11 on the first surface A of the flexible substrate 11 (for example, as shown in Figure 1). That is, the tactile feedback component in the embodiment of the present disclosure is a long strip, and the piezoelectric actuators 2 are arranged in a row. This can reduce the width of the tactile feedback component. For example, when the tactile feedback component in the embodiment of the present disclosure is integrated with a display, the tactile feedback component can be attached to the peripheral area of ​​the cover (for example, one long side). Since the present disclosure uses FPC on both sides for routing the piezoelectric actuator 2, the width of the peripheral area of ​​the cover can be reduced, thereby achieving a narrow frame.

[0068] In some embodiments, in the haptic feedback assembly provided in the embodiments of the present disclosure, as shown in Figures 3A, 4A, and 7A, the plurality of positive electrode pads 121 and the plurality of negative electrode pads 122 can be located in different rows and arranged in parallel. This can reduce the width of the flexible substrate 11 and achieve a narrow bezel when the haptic feedback device is integrated with a display or touch cover. As shown in Figures 5A and 6, the plurality of positive electrode pads 121 and the plurality of negative electrode pads 122 can be located in the same row. Regardless of whether the positive electrode pads 121 and the negative electrode pads 122 are located in the same row or in different rows, it is sufficient as long as the positive electrode pads 121 are electrically connected to the positive input pads 133 on the second surface B of the flexible substrate 11 via the positive traces 123, and the negative electrode pads 122 are electrically connected to the negative input pads 134 on the second surface B of the flexible substrate 11 via the negative traces 124.

[0069] In some embodiments, in the tactile feedback assembly provided by the embodiments of the present disclosure, as shown in Figures 3A, 4A, 5A, 6, and 7A, the positive electrode pads 121 and the negative electrode pads 122 are staggered along the length of the flexible substrate 11, and each piezoelectric actuator 2 covers an adjacent positive electrode pad 121 and a negative electrode pad 122. In this way, the piezoelectric actuator 2 shown in Figure 2 is welded to the positive electrode pad 121 and the negative electrode pad 122 to form the tactile feedback assembly shown in Figure 1.

[0070] In some embodiments, in the tactile feedback assembly provided by the embodiments of the present disclosure, as shown in Figures 1, 3A, 4A, 5A, 6, and 7A, the positive input pad 133 and the negative input pad 134 can be located at the same end of the flexible substrate 11, but are certainly not limited thereto.

[0071] In some embodiments, in the tactile feedback assembly provided by the embodiments of the present disclosure, as shown in Figures 3A, 4A, 5A, and 6, all negative electrode pads 122 are electrically connected to the same negative electrode trace 124. The end of the negative electrode trace 124 near the negative electrode input pad 134 is electrically connected to one end of the negative electrode lead 132 through a via V1 penetrating the flexible substrate 11. The other end of the negative electrode lead 132 extends along the length of the flexible substrate 11 to be electrically connected to the negative electrode input pad 134. In this way, all piezoelectric actuators 2 share a common negative electrode. By setting the positive electrode connection method of each piezoelectric actuator 2, driving modes such as overall drive and partitioned drive can be achieved.

[0072] In some embodiments, in the haptic feedback assembly provided by the embodiments of the present disclosure, as shown in Figures 3A and 5A , all positive electrode pads 121 are electrically connected to the same positive electrode trace 123. The end of the positive electrode trace 123, which is closest to the positive electrode input pad 133, is electrically connected to one end of a positive electrode lead 131 via a via V2 extending through the flexible substrate 11. The other end of the positive electrode lead 131 extends along the length of the flexible substrate 11 to be electrically connected to the positive electrode input pad 133. In this way, the positive electrodes of all piezoelectric actuators 2 are connected in parallel, and the negative electrodes of all piezoelectric actuators 2 are connected in parallel. After all piezoelectric actuators 2 are connected in parallel, they are connected to an external driver circuit (PCB) via the vias extending through the flexible substrate 11, the positive and negative electrode lead 133 on the second surface of the flexible substrate 11, and the rightmost positive electrode input pad 133 and negative electrode input pad 134. In Figures 3A and 5A, the driving form of the piezoelectric actuator 2 is an overall drive. For example, a ground voltage signal is applied to the negative input pad 134 through the PCB, and the ground voltage signal is transmitted to the negative pole of each piezoelectric actuator 2 through the negative input pad 134, the negative lead wire 132, the negative trace 124 and the negative pad 122. An AC voltage signal is applied to the positive input pad 133, and the AC voltage signal is transmitted to the positive pole of each piezoelectric actuator 2 through the positive input pad 133, the positive lead wire 131, the positive trace 123 and the positive pad 121. In this way, an alternating electric field can be formed between the positive pole of the piezoelectric actuator 2 and the negative pole of the piezoelectric actuator 2. Under the action of the alternating electric field, the piezoelectric actuator 2 generates vibration to achieve tactile feedback.

[0073] In some embodiments, in the above-mentioned tactile feedback component provided in the embodiments of the present disclosure, as shown in Figures 3A and 5A, when the tactile feedback component is integrated with a display, the distance between adjacent piezoelectric actuators 2 is determined by the position of the piezoelectric actuators 2 on the display; and to meet the requirements of large current, the widths of the positive electrode trace 123 and the negative electrode trace 124 on the first surface A of the flexible circuit board 1 and the positive electrode lead line 131 and the negative electrode lead line 132 on the second surface B are all greater than or equal to 2.54 mm, and the line spacing between the positive electrode trace 123 and the negative electrode trace 124 and the line spacing between the positive electrode lead line 131 and the negative electrode lead line 132 are greater than or equal to 0.5 mm.

[0074] In some embodiments, in the above-mentioned tactile feedback component provided in the embodiments of the present disclosure, as shown in Figures 3A and 5A, when integrating the tactile feedback component with the display, considering the narrow frame and subsequent assembly requirements, the width of the entire flexible circuit board 1 can be 1 cm, the thickness can be 1 mm, and the total length can be 42 cm. For example, the embodiment of the present disclosure is to connect 19 piezoelectric actuators 2 in parallel. Of course, the total length of the flexible circuit board 1 and the number of piezoelectric actuators 2 can be determined by the size of the integrated display.

[0075] In some embodiments, in the tactile feedback assembly provided by the embodiments of the present disclosure, as shown in FIG4A and FIG6 , a plurality of positive electrode pads 121 are divided into at least two groups of positive electrode pads along the length of the flexible substrate 11 (in this disclosure, two groups C1 and C2 are used as an example). Each positive electrode pad 121 in each group is electrically connected to the same positive electrode trace 123, while the positive electrode pads 121 in different groups are electrically connected to different negative electrode traces 124. In this way, the positive electrodes of the piezoelectric actuators 2 in group C1 are connected in parallel, the positive electrodes of the piezoelectric actuators 2 in group C2 are connected in parallel, and the negative electrodes of all piezoelectric actuators 2 are connected in parallel. In FIG4A and FIG6 , the piezoelectric actuators 2 are driven in a zoned manner, i.e., the piezoelectric actuators 2 in group C1 are driven together, and the piezoelectric actuators 2 in group C2 are driven together. Whether to drive group C1 or group C2 can be selected based on vibration requirements, thereby reducing power consumption.

[0076] In some embodiments, in the tactile feedback assembly provided by the embodiments of the present disclosure, as shown in FIG4A and FIG6 , a plurality of positive electrode pads 121 are divided into a first group C1 positive electrode pads 121 and a second group C2 positive electrode pads 121 along the length direction of the flexible substrate 11; the positive electrode trace 123 includes a first positive electrode trace 123 ′ and a second positive electrode trace 123 ″; the positive electrode lead wire 131 includes a first positive electrode lead wire 131 ′ and a second positive electrode lead wire 131 ″; the positive electrode input pad 133 includes a first positive input pad 133 ′ and a second positive input pad 133 ″;

[0077] Each positive electrode pad 121 in the first group C1 of positive electrode pads 121 is electrically connected to a first positive electrode trace 123'. The first positive electrode trace 123' is electrically connected to one end of a first positive electrode lead wire 131' in the middle region of the flexible substrate 11 through a via V3 that penetrates the flexible substrate 11. The other end of the first positive electrode lead wire 131' extends along the length of the flexible substrate 11 to be electrically connected to a first positive electrode input pad 133'.

[0078] Each positive electrode pad 121 in the second group C2 positive electrode pads 121 is electrically connected to the second positive electrode trace 123", and one end of the second positive electrode trace 123" close to the positive electrode input pad (133') is electrically connected to one end of the second positive electrode lead 131" through the via V4 penetrating the flexible substrate 11, and the other end of the second positive electrode lead 131" extends along the length direction of the flexible substrate 11 to be electrically connected to the second positive electrode input pad 133". In this way, the first group C1 The piezoelectric actuators 2 electrically connected to the positive pad 121 are the first group C1 piezoelectric actuators 2, and the piezoelectric actuators 2 electrically connected to the second group C2 positive pad 121 are the second group C2 piezoelectric actuators 2. The first group C1 piezoelectric actuators 2 and the second group C2 piezoelectric actuators 2 both apply a ground voltage signal to the negative input pad 134 through the PCB. The ground voltage signal is transmitted through the negative input pad 134, the negative lead 132, the negative trace 124 and the negative The positive electrode pad 122 is transmitted to the negative electrode of each piezoelectric actuator 2 in the first group C1 and the second group C2, and an AC voltage signal is applied to the first positive input pad 133' corresponding to the piezoelectric actuator 2 in the first group C1 through the PCB. The AC voltage signal is transmitted to the positive electrode of each piezoelectric actuator 2 in the first group C1 through the first positive input pad 133', the first positive lead line 131', the first positive trace 123' and the positive pad 121. An AC voltage signal is applied to the second positive input pad 133" corresponding to the piezoelectric actuator 2 in the second group C1 through the PCB. The AC voltage signal is transmitted to the positive electrode of each piezoelectric actuator 2 in the second group C2 through the second positive input pad 133", the second positive lead line 131", the second positive trace 123" and the positive pad 121. In this way, different driving signals can be used to achieve partitioned driving for the piezoelectric actuator 2 in the first group C1 and the piezoelectric actuator 2 in the second group C2.

[0079] In some embodiments, in the tactile feedback assembly provided by the embodiments of the present disclosure, as shown in FIG. 4A and FIG. 6 , the first positive input pad 133 ′, the second positive input pad 133 ″, and the negative input pad 134 may be sequentially arranged along the width direction of the flexible substrate 11 , but the present invention is not limited thereto.

[0080] In some embodiments, in the tactile feedback assembly provided by the embodiments of the present disclosure, as shown in FIG. 4A and FIG. 6 , the width of the flexible substrate 11 at the locations of the first positive input pad 133 ′, the second positive input pad 133 ″, and the negative input pad 134 is greater than the width of the flexible substrate 11 at other locations.

[0081] In some embodiments, in the tactile feedback assembly provided in the embodiments of the present disclosure, as shown in FIG4A and FIG6 , the width of the flexible circuit board 1 corresponding to the area where the piezoelectric actuator 2 is located can be 1 cm, the width of the first positive input pad 133 ′, the second positive input pad 133 ″, and the negative input pad 134 are located is 1.5 cm, the thickness of the flexible circuit board 1 can be 1 mm, and the total length of the flexible circuit board 1 can be 42 cm. For example, in the embodiment of the present disclosure, 19 piezoelectric actuators 2 are connected in parallel. Of course, the total length of the flexible circuit board 1 and the number of piezoelectric actuators 2 can be determined by the size of the integrated display.

[0082] It should be noted that the piezoelectric actuator 2 shown in Figures 4A and 6 is divided into a first group C1 (i.e., the left half) and a second group C2 (i.e., the right half) as an example. This is not limiting. For example, the piezoelectric actuator 2 can be divided into three or more groups from left to right, with different groups driven by different drive signals, facilitating precise control of the vibration effect. However, the greater the number of groups in which the piezoelectric actuator 2 is divided, the wider the flexible circuit board will be. This will occupy more frame space when integrated with a display, hindering the realization of a narrow frame.

[0083] In some embodiments, in the tactile feedback assembly provided by the embodiments of the present disclosure, as shown in FIG7A , the first positive electrode pad 121 (the leftmost end) arranged along the length direction of the flexible substrate 11 is electrically connected to one end of the positive electrode trace 123 , and the last negative electrode pad 122 (the rightmost end) arranged along the length direction of the flexible substrate 11 is electrically connected to one end of the negative electrode trace 124 ;

[0084] The first metal layer 12 also includes a plurality of series wirings 125, which electrically connect the previous negative electrode pad 122 to the next positive electrode pad 121 along the length of the flexible substrate 11 via the series wirings 125. For example, the leftmost positive electrode pad 121 is directly connected to the rightmost positive input pad 133 via a positive wiring 123. The negative electrode pad 122 corresponding to the first piezoelectric actuator 2 from the left is connected to the positive electrode pad 121 corresponding to the second piezoelectric actuator 2 from the left, the negative electrode pad 122 corresponding to the second piezoelectric actuator 2 from the left is connected to the positive electrode pad 121 corresponding to the third piezoelectric actuator 2 from the left, and so on. The negative electrode pad of the rightmost piezoelectric actuator 2 is directly connected to the rightmost negative input pad 134 via a negative wiring 124. Thus, the piezoelectric actuators 2 in the structure shown in FIG. 7A can be connected in series to achieve integrated driving of the piezoelectric actuators 2. Compared to parallel driving, integrated series driving can reduce power consumption.

[0085] In some embodiments, in the tactile feedback assembly provided by the embodiments of the present disclosure, as shown in FIG7A , the other end of the positive electrode trace 123 electrically connected to the first positive electrode pad 121 is electrically connected to one end of the positive electrode lead wire 131 at the middle position of the first piezoelectric actuator 2 through a via V5 penetrating the flexible substrate 11. The other end of the positive electrode lead wire 131 extends along the length direction of the flexible substrate 11 to be electrically connected to the positive electrode input pad 133.

[0086] The other end of the negative trace 124 electrically connected to the last negative pad 122 is electrically connected to one end of a negative lead 132 through a via extending through the flexible substrate 11. The other end of the negative lead 132 extends along the length of the flexible substrate 11 to be electrically connected to the negative input pad 134. In this way, the positive and negative electrodes of all piezoelectric actuators 2 are connected in series. In FIG7A , the piezoelectric actuator 2 is driven as a whole. For example, a ground voltage signal is applied to the negative input pad 134 and an AC voltage signal is applied to the positive input pad 133 through the PCB. This creates an alternating electric field between the positive and negative electrodes of the piezoelectric actuator 2. Under the action of the alternating electric field, the piezoelectric actuator 2 generates vibrations to provide tactile feedback.

[0087] In some embodiments, in the tactile feedback assembly provided in the embodiments of the present disclosure, as shown in FIG7A , to meet the requirements of high current, the widths of the positive trace 123 and the negative trace 124 on the first surface A of the flexible circuit board 1 and the positive lead wire 131 and the negative lead wire 132 on the second surface B are all greater than or equal to 2.54 mm, and the line spacing between the positive trace 123 and the negative trace 124 and the line spacing between the positive lead wire 131 and the negative lead wire 132 are greater than or equal to 0.5 mm. The width of the entire flexible circuit board 1 can be 1 cm, the thickness can be 1 mm, and the total length can be 42 cm.

[0088] In some embodiments, in the above-mentioned tactile feedback component provided in the embodiments of the present disclosure, as shown in Figures 3A, 4A and 7A, the shape of the piezoelectric actuator 2 can be rectangular, and the positive electrode pad 121 and the negative electrode pad 122 can be located in different rows. Of course, it is not limited to this, as long as the positive electrode trace 123 and the negative electrode trace 124 are not short-circuited.

[0089] In some embodiments, in the above-mentioned tactile feedback component provided in the embodiments of the present disclosure, as shown in Figures 5A and 6, the shape of the piezoelectric actuator 2 can be circular, and the positive electrode pad 121 and the negative electrode pad 122 can be located in the same row, or of course, they can be located in different rows as shown in Figures 3A and 4A, as long as the positive electrode trace 123 and the negative electrode trace 124 are not short-circuited.

[0090] In some embodiments, in the tactile feedback assembly provided by the embodiments of the present disclosure, the shape of the piezoelectric actuator 2 shown in FIG. 7A may also be circular.

[0091] In some embodiments, in the tactile feedback assembly provided in the embodiments of the present disclosure, as shown in FIG8 , FIG8 is a cross-sectional schematic diagram showing that the positive electrode trace 123 on the first surface A of the flexible substrate 11 in FIG3A is electrically connected to the positive electrode lead 131 on the second surface B of the flexible substrate 11 through a via V2 penetrating the flexible substrate 11. The other cross-sectional schematic diagrams connected through vias are the same as FIG8 .

[0092] In some embodiments, in the above-mentioned tactile feedback component provided in the embodiments of the present disclosure, the structure of the piezoelectric actuator is a piezoelectric film or a piezoelectric ceramic block. By using the piezoelectric film or the piezoelectric ceramic block, a given piezoelectric actuator voltage can directly provide vibration excitation. By utilizing the resonant frequency of some components of the screen module, the structure can generate ultrasonic vibration, so that the tactile feedback component produces a tactile feedback effect, and the tactile feedback can be adjusted by the squeeze film effect.

[0093] It should be noted that the positive electrode lead structure 21 and the negative electrode lead structure 22 of the piezoelectric actuator 2 shown in FIG2 are welded to the positions of the dotted boxes in FIG3A , FIG4A , FIG5A , FIG6 and FIG7A .

[0094] In some embodiments, the tactile feedback component provided by the embodiments of the present disclosure can be integrated into products such as notebooks and monitors, and can be used as a display screen in many fields such as in-vehicle displays and consumer electronics to provide users with a rich and realistic tactile experience.

[0095] Based on the same inventive concept, an embodiment of the present disclosure further provides a tactile feedback device, as shown in Figures 9 and 10. Figure 9 is a planar schematic diagram of the tactile feedback device, and Figure 10 is a side view along the AA' direction in Figure 9. The tactile feedback device includes the above-mentioned tactile feedback component 100 provided in an embodiment of the present disclosure.

[0096] In some embodiments, the tactile feedback device provided in the embodiments of the present disclosure, as shown in Figures 9 and 10, further includes a cover plate 200. In the tactile feedback assembly 100 shown in Figures 1, 2, 3A, 4A, 5A, 6 or 7A provided in the embodiments of the present disclosure, the side of the piezoelectric actuator 2 facing away from the flexible circuit board 1 is fitted with the peripheral area of ​​the cover plate 200. Due to assembly requirements, the height of the tactile feedback assembly 100 cannot be too high, generally not exceeding 5 mm.

[0097] In some embodiments, in the above-mentioned tactile feedback device provided in the embodiments of the present disclosure, as shown in Figures 9 and 10, the cover 200 is a structure that directly contacts the tactile senses such as fingers, and can be a cover on the surface of a notebook display module, a cover on the surface of a vehicle-mounted display module, a cover on the surface of a mobile terminal display module, or a cover on the surface of a display module for other application scenarios, etc.

[0098] In some embodiments, the tactile feedback device provided in the embodiments of the present disclosure, as shown in Figures 9 and 10, further includes a display module 300. The display module 300 and the tactile feedback assembly 100 are disposed on the same side of the cover plate 200. The display module 300 and the tactile feedback assembly 100 are disposed on the non-touch surface side of the cover plate 200, and the tactile feedback assembly 100 is disposed on the cover plate 200 on at least one side of the display module 300. In this way, the PCB can generate a drive signal based on the touch information of a touch object (such as a finger) on the cover plate 200 and transmit it to the piezoelectric actuator 2. In response to the drive signal, the piezoelectric actuator 2 drives the cover plate 200 to vibrate, thereby generating tactile feedback on the touch surface of the cover plate 200.

[0099] In some embodiments, in the tactile feedback device provided in the embodiments of the present disclosure, as shown in FIG9 , the display module 300 has a pair of long sides arranged opposite to each other and a pair of short sides connected to the pair of long sides. For a tactile feedback component 100 that only needs to stimulate the long sides of the cover plate 200 to generate vibration, the tactile feedback component 100 can be arranged only on one side of the pair of long sides of the cover plate 200. For a tactile feedback component 100 that only needs to stimulate the short sides of the cover plate 200 to generate vibration, the tactile feedback component 100 can be arranged only on one side of the pair of short sides of the cover plate 200. This can save the number of piezoelectric actuators 2, reduce costs, and reduce power consumption. In the embodiment of the present disclosure, a tactile feedback component 100 is arranged between each long side and the adjacent edge of the cover plate 200, and the long side extension direction of the tactile feedback component 100 is the same as the long side extension direction of the display module 300. In this way, by setting a tactile feedback component 100 between each long side and the adjacent edge of the cover plate 200, uniform tactile feedback can be achieved; and by setting the long side extension direction of the tactile feedback component 100 to be the same as the long side extension direction of the display module 300, a narrow frame can be achieved.

[0100] Of course, in some embodiments, in the above-mentioned tactile feedback device provided in the embodiment of the present disclosure, as shown in FIG9 , for a tactile feedback component that needs to stimulate vibrations on all sides of the cover plate 200, the tactile feedback component 100 can be set around the cover plate 200, and the position of the tactile feedback component 100 can be designed according to actual needs.

[0101] In some embodiments, the display module may be a liquid crystal display module or a self-luminous display module, which is not limited in this disclosure. The liquid crystal display module includes a liquid crystal display panel and a backlight source, and the self-luminous display module has a built-in light-emitting device, which may be, for example, an organic light-emitting diode (OLED), a quantum dot light-emitting diode (QLED), a sub-millimeter light-emitting diode (Mini LED), or a micro light-emitting diode (Micro LED).

[0102] In some embodiments, the display module may further include a touch function layer.

[0103] Since the principle of solving the problem of the tactile feedback device is similar to that of the aforementioned tactile feedback component, the implementation of the tactile feedback device can refer to the implementation of the aforementioned tactile feedback component, and the repeated parts are not repeated. The tactile feedback device can be a vehicle-mounted display device.

[0104] Optionally, the tactile feedback device can be a mobile phone, a tablet computer, a smart wearable device (such as a smart watch), a car display screen, etc.

[0105] In specific implementation, the tactile feedback device provided in the embodiment of the present disclosure may further include other functional structures well known to those skilled in the art, which will not be described in detail here.

[0106] Embodiments of the present disclosure provide a tactile feedback component and a tactile feedback device. The tactile feedback component connects a piezoelectric actuator to an external PCB via an FPC. Since the FPC can have double-sided wiring, when the tactile feedback component of the present disclosure is integrated with a display or touch substrate, the space occupied by the wiring connecting the piezoelectric actuator in the substrate's border area can be reduced, thereby achieving a narrow border. Furthermore, by rationally arranging the wiring connecting the piezoelectric actuator to the PCB, noise generated by the wiring as the piezoelectric actuator vibrates can also be reduced.

[0107] Although the preferred embodiments of the present disclosure have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present disclosure.

[0108] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present disclosure without departing from the spirit and scope of the embodiments of the present disclosure. Thus, if such changes and modifications of the embodiments of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include such changes and modifications.

Claims

1. A haptic feedback component, wherein, include: A flexible circuit board, the flexible circuit board comprising: a flexible substrate, a first metal layer arranged on one side of a first surface of the flexible substrate, and a second metal layer arranged on one side of a second surface of the flexible substrate; wherein the first surface and the second surface are arranged opposite to each other along a thickness direction of the flexible substrate; A plurality of piezoelectric actuators are arranged on a side of the first metal layer facing away from the flexible substrate, the piezoelectric actuators are electrically connected to the first metal layer, the first metal layer is electrically connected to the second metal layer through a via hole penetrating the flexible substrate, and the second metal layer is electrically connected to an external driving circuit; the piezoelectric actuators are configured to generate tactile feedback in response to a driving signal input by the external driving circuit.

2. The tactile feedback component according to claim 1, wherein, The piezoelectric actuator has a positive electrode lead-out structure and a negative electrode lead-out structure on one side facing the flexible circuit board; The first metal layer includes multiple positive electrode pads, multiple negative electrode pads, positive electrode routing and negative electrode routing, the positive electrode lead-out structure is electrically connected to the positive electrode pad, the negative electrode lead-out structure is electrically connected to the negative electrode pad, the positive electrode pad is electrically connected to the positive electrode routing, and the negative electrode pad is electrically connected to the negative electrode routing.

3. The haptic feedback component according to claim 2, wherein, The second metal layer includes a positive lead wire, a negative lead wire, a positive input pad and a negative input pad, the positive lead wire is electrically connected to the positive lead wire, the negative lead wire is electrically connected to the negative lead wire, the positive lead wire is electrically connected to the positive input pad, the positive input pad is electrically connected to the external drive circuit, the negative lead wire is electrically connected to the negative input pad, and the negative input pad is electrically connected to the external drive circuit.

4. The tactile feedback component according to claim 3, wherein, The plurality of positive electrode pads are sequentially arranged on the first surface of the flexible substrate along the length direction of the flexible substrate, and the plurality of negative electrode pads are sequentially arranged on the first surface of the flexible substrate along the length direction of the flexible substrate.

5. The haptic feedback component according to claim 4, wherein, The plurality of positive electrode pads and the plurality of negative electrode pads are located in different rows and are arranged in parallel, or the plurality of positive electrode pads and the plurality of negative electrode pads are located in the same row.

6. The haptic feedback component according to claim 5, wherein, The positive electrode pads and the negative electrode pads are arranged alternately along the length direction of the flexible substrate, and each of the piezoelectric actuators covers an adjacent positive electrode pad and a adjacent negative electrode pad.

7. The haptic feedback component according to claim 6, wherein, The positive input pad and the negative input pad are located at the same end of the flexible substrate.

8. The haptic feedback component according to claim 7, wherein, All of the negative electrode pads are electrically connected to the same negative electrode trace, one end of the negative electrode trace close to the negative electrode input pad is electrically connected to one end of the negative electrode lead wire through a via hole penetrating the flexible substrate, and the other end of the negative electrode lead wire extends along the length direction of the flexible substrate to be electrically connected to the negative electrode input pad.

9. The tactile feedback component according to claim 8, wherein, All of the positive electrode pads are electrically connected to the same positive electrode trace, one end of the positive electrode trace close to the positive electrode input pad is electrically connected to one end of the positive electrode lead wire through a via hole penetrating the flexible substrate, and the other end of the positive electrode lead wire extends along the length direction of the flexible substrate to be electrically connected to the positive electrode input pad.

10. The tactile feedback component according to claim 8, wherein, The plurality of positive electrode pads are divided into at least two groups of positive electrode pads along the length direction of the flexible substrate, each positive electrode pad in each group is electrically connected to the same positive electrode trace, and the positive electrode pads in different groups are electrically connected to different negative electrode traces.

11. The haptic feedback component according to claim 10, wherein, The plurality of positive electrode pads are divided into a first group of positive electrode pads and a second group of positive electrode pads along the length direction of the flexible substrate. The positive electrode traces include a first positive electrode trace and a second positive electrode trace. The positive electrode lead-out lines include a first positive electrode lead-out line and a second positive electrode lead-out line. The positive electrode input pads include a first positive electrode input pad and a second positive electrode input pad. Each of the positive electrode pads in the first group of positive electrode pads is electrically connected to the first positive electrode trace. The first positive electrode trace passes through a via hole penetrating the flexible substrate in the middle region of the flexible substrate. and is electrically connected to one end of the first positive electrode lead-out line. The other end of the first positive electrode lead-out line extends along the length direction of the flexible substrate to be electrically connected to the first positive electrode input pad. Each of the positive electrode pads in the second group of positive electrode pads is electrically connected to the second positive electrode trace. One end of the second positive electrode trace close to the positive electrode input pad is electrically connected to one end of the second positive electrode lead-out line through a via hole penetrating the flexible substrate. The other end of the second positive electrode lead-out line extends along the length direction of the flexible substrate to be electrically connected to the second positive electrode input pad.

12. The tactile feedback component according to claim 11, wherein, The first positive electrode input pad, the second positive electrode input pad, and the negative electrode input pad are arranged in sequence along the width direction of the flexible substrate.

13. The haptic feedback component according to claim 12, wherein, The width of the flexible substrate at the positions where the first positive electrode input pad, the second positive electrode input pad, and the negative electrode input pad are located is greater than the width of the flexible substrate at the remaining positions.

14. The haptic feedback component according to claim 7, wherein, The first positive electrode pad arranged along the length direction of the flexible substrate is electrically connected to one end of the positive electrode trace. The last negative electrode pad arranged along the length direction of the flexible substrate is electrically connected to one end of the negative electrode trace. The first metal layer further includes a plurality of series connection lines. The previous negative electrode pad and the next positive electrode pad along the length direction of the flexible substrate are electrically connected through the series connection lines.

15. The haptic feedback component according to claim 14, wherein, The other end of the positive electrode trace electrically connected to the first positive electrode pad is electrically connected to one end of the positive electrode lead-out line through a via hole penetrating the flexible substrate at the middle position of the first piezoelectric actuator. The other end of the positive electrode lead-out line extends along the length direction of the flexible substrate to be electrically connected to the positive electrode input pad. The other end of the negative electrode trace electrically connected to the last negative electrode pad is electrically connected to one end of the negative electrode lead-out line through a via hole penetrating the flexible substrate. The other end of the negative electrode lead-out line extends along the length direction of the flexible substrate to be electrically connected to the negative electrode input pad.

16. The haptic feedback component according to any one of claims 2-15, wherein, The shape of the piezoelectric actuator includes a rectangle or a circle.

17. The haptic feedback component according to any one of claims 1-16, wherein, The structure of the piezoelectric actuator is a piezoelectric thin film or a piezoelectric ceramic block.

18. A haptic feedback device, wherein, Comprising the tactile feedback component according to any one of claims 1 to 17.

19. The haptic feedback device according to claim 18, wherein, Further comprising a cover plate, and one side of the piezoelectric actuator facing away from the flexible circuit board is attached to the peripheral region of the cover plate.

20. The tactile feedback device according to claim 19, wherein, It further includes a display module. The display module and the haptic feedback component are arranged on the same side of the cover plate, and the haptic feedback component is arranged on the cover plate on at least one side of the display module.

21. The tactile feedback device according to claim 20, wherein, The display module has a pair of long sides arranged oppositely and a pair of short sides connected to the pair of long sides. The haptic feedback component is arranged between each long side and the adjacent edge of the cover plate, and the extending direction of the long side of the haptic feedback component is the same as the extending direction of the long side of the display module.

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