Tactile feedback module, driving method thereof and tactile feedback device

Abstract

The invention discloses a tactile feedback module, a driving method thereof and a tactile feedback device, and relates to the technical field of electronics. The tactile feedback module comprises: a touch display panel comprising a display surface; the cover plate is arranged on one side of the touch display panel and is close to the display surface; the actuators and the touch display panel are arranged on the same side of the cover plate, and the actuators are used for driving the cover plate to vibrate in response to driving signals so as to generate tactile feedback on the surface, deviating from the touch display panel, of the cover plate; wherein the actuator is arranged close to the edge of the touch display panel.

Description

Tactile feedback module and driving method thereof, and tactile feedback device Technical Field

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

[0002] Haptic feedback is a cutting-edge technology in virtual reality and human-computer interaction. Multimedia devices like smartphones and tablets that utilize haptic feedback have broad application prospects in education, entertainment, and healthcare. With the rapid development of new energy vehicles, large in-vehicle displays have become a trend, and more and more interactive components such as physical buttons and knobs are being implemented on touchscreen displays.

[0003] Overview

[0004] The present disclosure provides a tactile feedback module, comprising:

[0005] A touch display panel, comprising a display surface;

[0006] a cover plate, disposed on one side of the touch display panel and close to the display surface; and

[0007] a plurality of actuators disposed on the same side of the cover plate as the touch display panel, the actuators being configured to vibrate the cover plate in response to a drive signal to generate tactile feedback on a surface of the cover plate facing away from the touch display panel;

[0008] Wherein, the actuator is arranged close to the edge of the touch display panel.

[0009] In some embodiments, at least one of the actuators is located on a side of the touch display panel facing away from the cover plate, and an orthographic projection of at least one of the actuators on the cover plate is within a range of an orthographic projection of the touch display panel on the cover plate.

[0010] In some embodiments, at least one of the actuators is located on a side of the cover plate close to the touch display panel, and the orthographic projection of at least one of the actuators on the cover plate is located outside the orthographic projection range of the touch display panel on the cover plate and within the edge of the cover plate.

[0011] In some embodiments, the plurality of actuators are disposed near a second edge of the touch display panel, and the plurality of actuators disposed near the second edge are arranged in a direction parallel to the second edge.

[0012] In some embodiments, the plurality of actuators are divided into at least one actuation group, the actuation group is divided into two actuation units, and each actuation unit includes at least one actuator; and

[0013] The two actuating units in the same actuating group are respectively arranged close to different edges of the two oppositely arranged edges of the touch display panel.

[0014] In some embodiments, two actuation units in the same actuation group are symmetrically arranged and include the same number of actuators.

[0015] In some embodiments, the at least one actuation group comprises:

[0016] a first actuation group, configured to generate vibrations of a first frequency, wherein the actuation units within the first actuation group are first actuation units, and two first actuation units within the same first actuation group are disposed near two third edges of the touch display panel, and the two third edges are disposed opposite to each other along a first direction; and / or

[0017] a second actuation group, configured to generate vibrations of a second frequency, wherein the actuation units within the second actuation group are second actuation units, and two second actuation units within the same second actuation group are disposed near two fourth edges of the touch display panel, the two fourth edges being disposed opposite to each other along the second direction;

[0018] The first frequency is greater than the second frequency, and the second direction is parallel to or crosses the first direction.

[0019] In some embodiments, the second direction is parallel to the first direction, and the first actuating unit is located on a side of the second actuating unit close to an edge of the cover plate.

[0020] In some embodiments, the plurality of actuators within the first actuation unit are arranged equidistantly at a first interval in a direction parallel to the third edge;

[0021] The plurality of actuators in the second actuation unit are arranged in equal intervals at a second interval in a direction parallel to the fourth edge;

[0022] The first spacing is smaller than or equal to the second spacing.

[0023] In some embodiments, the first spacing is less than or equal to a first wavelength, where the first wavelength is a wavelength of a mechanical wave generated when an actuator in the first actuating unit drives the cover plate to vibrate.

[0024] In some embodiments, the size of the actuator in the first direction is greater than or equal to one-eighth of the first wavelength and less than or equal to one-half of the first wavelength, where the first wavelength is the wavelength of the mechanical wave formed when the actuator located in the first actuating unit drives the cover plate to vibrate.

[0025] In some embodiments, the actuator is located at a crest or trough of a first mechanical wave, and the first mechanical wave is a mechanical wave formed when the actuator located in the first actuating unit drives the cover plate to vibrate.

[0026] In some embodiments, the cover plate includes two fifth edges disposed proximate to the two third edges, and two sixth edges disposed proximate to the two fourth edges; and

[0027] The two fifth edges are parallel to each other, and the two sixth edges are parallel to each other or cross each other.

[0028] In some embodiments, the touch display panel includes a flexible display panel, the display surface of the flexible display panel is a curved surface, and the third edge is perpendicular to a curved arc of the curved surface.

[0029] In some embodiments, the touch display panel includes a pair of long sides and a pair of short sides, and the two fourth edges are the pair of long sides of the touch display panel.

[0030] In some embodiments, the touch display panel includes a flexible display panel, the display surface of the flexible display panel is a curved surface, and the curved surface has a curved arc with a bending radius of R; and

[0031] The dimension of the actuator along the bending arc direction is greater than or equal to R / 60 and less than or equal to R / 20.

[0032] In some embodiments, the touch display panel includes a flexible display panel;

[0033] Wherein, the display surface of the flexible display panel is a plane, and the surface of the cover plate close to the flexible display panel is a plane parallel to the display surface; or

[0034] The display surface of the flexible display panel is a curved surface, and the surface of the cover plate close to the flexible display panel is a curved surface parallel to the display surface.

[0035] In some embodiments, the actuator includes at least one of the following: a PZT piezoelectric film, a monolithic piezoelectric ceramic, a stacked piezoelectric ceramic, a cymbal-type piezoelectric ceramic, a monolithic polyvinylidene fluoride film, a stacked polyvinylidene fluoride film, a cymbal-type polyvinylidene fluoride film, and a linear motor.

[0036] The present disclosure provides a tactile feedback device, comprising:

[0037] A tactile feedback module as described in any embodiment; and

[0038] a driving component connected to the touch display panel and the actuator, respectively, for driving the touch display panel to display an image, and outputting a driving signal to the actuator based on touch information of the touch body on the touch display panel, so that the actuator responds to the driving signal and drives the cover plate to vibrate, thereby generating tactile feedback on the surface of the cover plate away from the touch display panel, wherein the touch information includes at least one of the following: touch position, touch time and touch action.

[0039] In some embodiments, the plurality of actuators are connected to the drive assembly in parallel, so that the drive assembly can independently drive each actuator.

[0040] The present disclosure provides a driving method for a tactile feedback module, which is applied to the tactile feedback module described in some embodiments. The driving method includes:

[0041] applying drive signals with the same phase to the actuators of the two second actuating units in the same second actuating group, so that the actuators of the two second actuating units in the same second actuating group generate vibration waveforms with the same phase; or

[0042] Driving signals with opposite phases are applied to the actuators of the two second actuating units in the same second actuating group, so that the actuators of the two second actuating units in the same second actuating group generate vibration waveforms with opposite phases.

[0043] 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.

[0044] BRIEF DESCRIPTION OF THE DRAWINGS

[0045] 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.

[0046] FIG1 exemplarily shows a schematic cross-sectional structure diagram of several tactile feedback modules;

[0047] 2 to 7 exemplarily show planar structural diagrams of several tactile feedback modules;

[0048] FIG8 exemplarily shows a schematic structural diagram of two touch display panels and a cover plate;

[0049] FIG9 exemplarily shows mechanical vibration interference formed under high-frequency vibration;

[0050] FIG10 exemplarily shows a waveform diagram obtained by superimposing two vibration waveforms;

[0051] FIG11 exemplarily shows several schematic diagrams of tactile feedback effects;

[0052] FIG12 exemplarily shows a structural diagram of a tactile feedback device.

[0053] Detailed description

[0054] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present disclosure without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0055] 1 , a schematic cross-sectional view of several tactile feedback module embodiments is shown. 2 to 7 , schematic plan views of several tactile feedback module embodiments are shown.

[0056] The present disclosure provides a tactile feedback module, as shown in Figure 1, which includes: a touch display panel 11, including a display surface Sd; a cover plate 12, arranged on one side of the touch display panel 11 and close to the display surface Sd; and a plurality of actuators 13, arranged on the same side of the cover plate 12 as the touch display panel 11, the actuators 13 being used to drive the cover plate 12 to vibrate in response to a driving signal to generate tactile feedback on the surface of the cover plate 12 facing away from the touch display panel 11, namely, the touch surface St.

[0057] For example, as shown in FIG12 , the drive component 122 of the tactile feedback module can drive the touch display panel 11 to display the interactive interface. Based on the touch information of the touch-sensitive object on the touch display panel 11, the drive signal is generated and output to the actuator 13. In response to the drive signal, the actuator 13 causes the cover 12 to vibrate, thereby generating tactile feedback on the touch surface St. The touch information includes at least one of the following: touch position, touch duration, and touch action. The touch-sensitive object can be an object such as a finger or a stylus.

[0058] Exemplarily, the actuator 13 can drive the cover plate 12 , and can also drive the cover plate 12 and the touch display panel 11 to vibrate together.

[0059] The haptic feedback module provided by this disclosure, combined with the driving signal waveform, can achieve tactile feedback effects with rich vibration and texture variations, enhancing the human-computer interaction experience and driving safety. The haptic feedback module provided by this disclosure can be applied to in-vehicle display systems, for example, in the vehicle's central control console, armrest screen, and passenger entertainment screen.

[0060] In addition, by arranging the actuator 13 on the back side of the cover plate 12 , not only the uniformity of the touch feeling on the touch surface St can be improved, but also the aesthetics of the tactile feedback module can be improved.

[0061] 1 to 7 , the actuator 13 is disposed near an edge of the touch display panel 11 . That is, the orthographic projection of the actuator 13 on the cover plate 12 is disposed near an orthographic projection edge of the touch display panel 11 on the cover plate 12 .

[0062] By arranging the actuator 13 near the edge of the touch display panel 11 , the tactile uniformity of the tactile feedback module within the touch display area can be further improved.

[0063] In the present disclosure, the cover plate 12 serves to encapsulate and protect the touch display panel 11. The cover plate 12 may be, for example, a transparent glass cover plate.

[0064] For example, the touch display panel 11 may include a touch circuit and a display panel. The touch circuit may be integrated into the display panel or may be provided independently of the display panel. For example, the touch circuit may be attached between the display panel and the cover plate 12. The touch circuit is used to detect touch information of a touch-sensitive object on the touch display panel 11.

[0065] For example, as shown in any one of FIG. 2 to FIG. 7 , the touch display panel 11 is in a rectangular shape, which is not limited in the present disclosure.

[0066] Exemplarily, the shape of the cover plate 12 can be a regular shape such as a rectangle (as shown in Figure 2 or Figure 5), a trapezoid (as shown in Figure 4 or Figure 7), or an irregular shape. As shown in Figure 3 or Figure 6, the shape of the cover plate 12 is a hyperbola, and the hyperbolic cover plate 12 includes two parallel sides (the upper and lower sides of the cover plate 12 as shown in the figure), and also includes two hyperbolic sides (the left and right sides of the cover plate 12 as shown in the figure).

[0067] In some embodiments, as shown in Figure a in Figure 1, at least one actuator 13 is located on the side of the touch display panel 11 facing away from the cover plate 12, and the orthographic projection of at least one actuator 13 on the cover plate 12 is located within the orthographic projection range of the touch display panel 11 on the cover plate 12.

[0068] In this embodiment, since the actuator 13 is located on the back of the touch display panel 11 , it does not occupy any additional space of the frame, which is conducive to achieving a narrow frame.

[0069] For example, a support layer (not shown) may be provided between the touch display panel 11 and the actuator 13 to protect and fix the touch display panel 11. The support layer may be, for example, an aluminum film or a copper film.

[0070] In some embodiments, as shown in FIG1 b, at least one actuator 13 is located on a side of the cover plate 12 close to the touch display panel 11, and the orthographic projection of the at least one actuator 13 on the cover plate 12 is located outside the orthographic projection of the touch display panel 11 on the cover plate 12 and within the edge of the cover plate 12. That is, in the orthographic projection on the cover plate 12, the at least one actuator 13 is located between the edge of the touch display panel 11 and the edge of the cover plate 12.

[0071] In this embodiment, since the actuator 13 and the touch display panel 11 are disposed on the back of the cover plate 12 in the same layer, the thickness of the tactile feedback module is less affected, which is conducive to reducing the thickness of the tactile feedback module.

[0072] In some embodiments, as shown in Figure c in Figure 1, a portion of the actuators 13 are located on the side of the touch display panel 11 facing away from the cover plate 12, and the orthographic projection of this portion of the actuators 13 on the cover plate 12 is within the orthographic projection range of the touch display panel 11 on the cover plate 12; another portion of the actuators 13 are located on the side of the cover plate 12 close to the touch display panel 11, and the orthographic projection of this portion of the actuators 13 on the cover plate 12 is outside the orthographic projection range of the touch display panel 11 on the cover plate 12 and within the edge of the cover plate 12.

[0073] In some embodiments, as shown in any one of Figures 2 to 7, the actuator 13 is located between the first edge of the touch display panel 11 and the edge of the cover plate 12, and in the direction along the first edge, the actuator 13 located between the first edge and the edge of the cover plate 12 is located between the two end points of the first edge.

[0074] The first edge may be any edge of the touch display panel 11. For example, as shown in any one of Figures 2 to 7, the touch display panel 11 is a quadrilateral, and the first edge may be any one of the four sides of the quadrilateral.

[0075] Exemplarily, as shown in any one of Figures 2 to 7, the actuator 13 located between the left edge of the touch display panel 11 and the edge of the cover 12 is located in the setting area along the left edge of the touch display panel 11, between the upper and lower end points of the left edge of the touch display panel 11.

[0076] 2 to 7 , the actuator 13 located between the right edge of the touch display panel 11 and the edge of the cover 12 is located in a setting area along the right edge of the touch display panel 11 , between the upper and lower end points of the right edge of the touch display panel 11 .

[0077] Exemplarily, as shown in any one of Figures 2 to 7, the actuator 13 located between the upper edge of the touch display panel 11 and the edge of the cover plate 12 is located in the setting area along the upper edge of the touch display panel 11, between the left and right end points of the upper edge of the touch display panel 11.

[0078] Exemplarily, as shown in any one of Figures 2 to 7, the actuator 13 located between the lower edge of the touch display panel 11 and the edge of the cover 12 is located in the setting area along the lower edge of the touch display panel 11, between the left and right end points of the lower edge of the touch display panel 11.

[0079] This embodiment is beneficial for enhancing the tactile intensity of the tactile feedback module in the touch display area.

[0080] It should be noted that, as shown in FIG. 5 to FIG. 7 f, the actuator 13 located between the first edge of the touch display panel 11 and the edge of the cover 12 also extends beyond the area between the two end points of the first edge, which is not limited in the present disclosure.

[0081] In some embodiments, as shown in any one of FIG. 2 to FIG. 7 , the plurality of actuators 13 are disposed near the second edge of the touch display panel 11 , and the plurality of actuators 13 disposed near the second edge are arranged in a direction parallel to the second edge.

[0082] The second edge may be any edge of the touch display panel 11. For example, if the touch display panel 11 is a quadrilateral, the second edge may be any one of the four sides of the quadrilateral.

[0083] For example, the plurality of actuators 13 disposed near the second edge may be arranged at equal intervals in a direction parallel to the second edge, thereby further improving the tactile uniformity of the tactile feedback module within the touch display area.

[0084] In some embodiments, as shown in any one of Figures 2 to 7 , the plurality of actuators 13 are divided into at least one actuation group G, which is divided into two actuation units C. Each actuation unit C includes at least one actuator 13. The two actuation units C in the same actuation group G are respectively disposed near different edges of two oppositely disposed edges of the touch display panel 11.

[0085] For example, as shown in any one of Figures 2 to 7, the touch display panel 11 is rectangular, and an actuating unit C located in the same actuating group G is arranged near the upper side of the rectangle, and the other actuating unit C is arranged near the lower side of the rectangle, or an actuating unit C located in the same actuating group G is arranged near the left side of the rectangle, and the other actuating unit C is arranged near the right side of the rectangle.

[0086] By arranging the two actuating units C in the same actuating group G close to different edges, and the edges close to the two actuating units C are arranged relative to each other, the tactile uniformity of the tactile feedback module in the touch display area can be further improved.

[0087] The actuation unit C may include one or more actuators 13. For example, as shown in FIG2 to FIG7, the actuation unit C may include two, three, four, five or six actuators 13.

[0088] In some embodiments, as shown in any one of FIG. 2 to FIG. 7 , two actuating units C in the same actuating group G are symmetrically arranged and include the same number of actuators 13 .

[0089] In this embodiment, by symmetrically arranging the two actuating units C in the same actuating group G, the tactile uniformity of the tactile feedback module within the touch display area can be further improved.

[0090] For example, as shown in any of Figures 2 to 7 , the two actuating units C within the same actuating group G can be arranged axially symmetrically, with the axis of symmetry being, for example, the geometric axis of symmetry of the display surface Sd. For example, as shown in any of Figures 2 to 7 , the display surface Sd is rectangular in shape, and the axis of symmetry of the two actuating units C within the same actuating group G is the geometric axis of symmetry of the rectangle.

[0091] For example, as shown in any of Figures 2 to 7 , the two actuating units C within the same actuating group G can be centrally symmetrically arranged, with the center of symmetry being, for example, the geometric center of the display surface Sd. For example, as shown in any of Figures 2 to 7 , the display surface Sd is rectangular in shape, and the center of symmetry of the two actuating units C within the same actuating group G is the geometric center of the rectangle.

[0092] In some embodiments, as shown in any one of Figures 5 to 7, the at least one actuating group G includes: a first actuating group GH, used to generate vibrations of a first frequency, the actuating unit C located in the first actuating group GH is a first actuating unit CH, and the two first actuating units CH located in the same first actuating group GH are arranged near two third edges s3 of the touch display panel 11, and the two third edges s3 are arranged opposite to each other along the first direction f1.

[0093] For example, a driving signal of a first frequency, such as a first frequency greater than or equal to 20 kHz, may be applied to the actuator 13 in the first actuation unit CH to regulate the friction of the vibrating surface, thereby achieving a change in texture details of the surface roughness.

[0094] Exemplarily, as shown in any one of Figures 5 to 7, the shape of the display surface Sd is a rectangle. If the first direction f1 is parallel to the short side of the rectangle, the two third edges s3 are a pair of long sides of the rectangle. If the first direction f1 is parallel to the long side of the rectangle, the two third edges s3 are a pair of short sides of the rectangle.

[0095] In some embodiments, as shown in any one of FIG. 5 to FIG. 7 , the at least one actuation group G includes a second actuation group GL configured to generate vibrations at a second frequency. The actuation units C within the second actuation group GL are second actuation units CL. The two second actuation units CL within the same second actuation group GL are disposed adjacent to two fourth edges s4 of the touch display panel 11, with the two fourth edges s4 facing each other along the second direction f2. The first frequency is greater than the second frequency.

[0096] For example, a driving signal of a second frequency may be applied to the actuator 13 in the second actuating unit CL. For example, the second frequency may be greater than or equal to 100 Hz and less than or equal to 500 Hz, so as to achieve a low-frequency vibration feedback effect.

[0097] Exemplarily, as shown in any one of Figures 5 to 7, the shape of the display surface Sd is a rectangle. If the second direction f2 is parallel to the short side of the rectangle, the two fourth edges s4 are a pair of long sides of the rectangle. If the second direction f2 is parallel to the long side of the rectangle, the two fourth edges s4 are a pair of short sides of the rectangle.

[0098] It should be noted that in Figures 2 to 4, the tactile feedback module includes an actuator group G. In order to enable the actuator group G to achieve low-frequency and high-frequency vibrations, the actuator group G can be time-division multiplexed. For example, in the low-frequency vibration stage, a low-frequency driving signal of a second frequency is applied to the actuator group G to achieve a low-frequency vibration feedback effect; in the high-frequency vibration stage, a high-frequency driving signal of a first frequency is applied to the same actuator group G to achieve regulation of surface friction.

[0099] In some embodiments, as shown in any one of Figures 5 to 7, the at least one actuation group G includes: a first actuation group GH and a second actuation group GL. In this way, by providing the first actuation group GH and the second actuation group GL in the tactile feedback module, low-frequency and high-frequency vibrations can be generated simultaneously without time-sharing multiplexing the actuation group G, thereby achieving a high- and low-frequency composite tactile feedback effect. The tactile feedback effect may include: key feedback as shown in Figure 11a, including key vibration and key boundary texture reproduction, the knob click feeling as shown in Figure 11b, which can be achieved by changing the friction force, and the texture feeling generated by the change of the friction force of the slider as shown in Figure 11c.

[0100] In some embodiments, as shown in d or f in any one of Figures 5 to 7, the second direction f2 is parallel to the first direction f1. In this embodiment, the third edge s3 is the same as the fourth edge s4.

[0101] For example, the display surface Sd is shaped like a rectangle, as shown in Figure d or Figure f in any of Figures 5 to 7 . The first direction f1 and the second direction f2 are both parallel to the short sides of the rectangle, and the two third edges s3 and the two fourth edges s4 are both a pair of long sides of the rectangle. Of course, the first direction f1 and the second direction f2 can also be parallel to the long sides of the rectangle, and the two third edges s3 and the two fourth edges s4 are both a pair of short sides of the rectangle.

[0102] In some embodiments, as shown in FIG. 5 to FIG. 7 , the second direction f2 is parallel to the first direction f1, and the first actuating unit CH is located on a side of the second actuating unit CL that is close to the edge of the cover plate 12. Thus, by arranging the first actuating unit CH outside the second actuating unit CL, the tactile feel can be further improved.

[0103] For example, as shown in Figure f in any one of Figures 5 to 7, the second actuating unit CL is located within the range of the touch display panel 11, and the first actuating unit CH is located outside the range of the touch display panel 11 and within the edge of the cover plate 12, that is, the first actuating unit CH is located between the second actuating unit CL and the edge of the cover plate 12.

[0104] It should be noted that, as shown in FIG. 5 to FIG. 7 d, the second direction f2 is parallel to the first direction f1 , and the first actuating unit CH may also be located on a side of the second actuating unit CL away from the edge of the cover plate 12 .

[0105] In some embodiments, as shown in FIG. 5 a, FIG. 6 b, FIG. 7 c or FIG. 7 e, the second direction f2 and the first direction f1 intersect with each other.

[0106] Furthermore, as shown in Figure a, Figure b, Figure c or Figure e in any one of Figures 5 to 7 , the second direction f2 is perpendicular to the first direction f1 .

[0107] Further, as shown in Figure a, Figure b, Figure c or Figure e in Figure 5 , the third edge s3 may be perpendicular to the fourth edge s4 , for example.

[0108] For example, as shown in Figures a, b, c, or e in any of Figures 5 to 7 , the display surface Sd is shaped like a rectangle, the first direction f1 is parallel to the short side of the rectangle, the second direction f2 is parallel to the long side of the rectangle, the two third edges s3 are a pair of long sides of the rectangle, and the two fourth edges s4 are both a pair of short sides of the rectangle. Of course, the first direction f1 can also be parallel to the long side of the rectangle, the second direction f2 is parallel to the short side of the rectangle, the two third edges s3 are a pair of short sides of the rectangle, and the two fourth edges s4 are both a pair of long sides of the rectangle.

[0109] In some embodiments, as shown in any one of FIG. 5 to FIG. 7 , the plurality of actuators 13 in the first actuation unit CH are arranged at equal intervals at a first interval d1 along a direction parallel to the third edge s3 .

[0110] In some embodiments, as shown in any one of FIG. 5 to FIG. 7 , the plurality of actuators 13 located in the second actuation unit CL are arranged at equal intervals at a second interval d2 along a direction parallel to the fourth edge s4 .

[0111] As shown in Figure d or Figure f in any one of Figures 5 to 7, when the second direction f2 is parallel to the first direction f1, the arrangement direction of the multiple actuators 13 located in the first actuator unit CH is parallel to the arrangement direction of the multiple actuators 13 located in the second actuator unit CL.

[0112] As shown in Figure d in any one of Figures 5 to 7, the display surface Sd is in the shape of a rectangle, the first direction f1 and the second direction f2 are both parallel to the short sides of the rectangle, the two third edges s3 and the two fourth edges s4 are both a pair of long sides of the rectangle, and the multiple actuators 13 located in the first actuator unit CH are arranged along the long side direction, and the multiple actuators 13 located in the second actuator unit CL are arranged along the long side direction.

[0113] As shown in Figure a, Figure b, Figure c or Figure e in any one of Figures 5 to 7, when the second direction f2 is perpendicular to the first direction f1, the arrangement direction of the multiple actuators 13 located in the first actuating unit CH is perpendicular to the arrangement direction of the multiple actuators 13 located in the second actuating unit CL.

[0114] As shown in Figure a, Figure b, Figure c or Figure e in any one of Figures 5 to 7, the display surface Sd is in the shape of a rectangle, the first direction f1 is parallel to the short side of the rectangle, the second direction f2 is parallel to the long side of the rectangle, the two third edges s3 are a pair of long sides of the rectangle, and the two fourth edges s4 are both a pair of short sides of the rectangle. The multiple actuators 13 located in the first actuator unit CH are arranged along the long side direction, and the multiple actuators 13 located in the second actuator unit CL are arranged along the short side direction.

[0115] In some embodiments, as shown in any one of FIG. 5 to FIG. 7 , the first distance d1 is smaller than the second distance d2 .

[0116] For low-frequency drive signals, the wavelength of the mechanical wave generated by the low-frequency vibration of the actuator 13 is greater than the size of the touch display panel 11. Therefore, the present disclosure does not limit the specific value of the second spacing d2. For high-frequency signals, the wavelength of the mechanical wave generated by the high-frequency vibration of the actuator 13 is shorter. Therefore, setting the first spacing d1 to a smaller value can ensure that adjacent actuators 13 in the first actuator unit CH can form regular mechanical vibration interference fringes in the first direction f1, as shown in Figure 9.

[0117] In order to form regular mechanical vibration interference fringes, in some embodiments, the first spacing d1 is less than or equal to the first wavelength λ, where the first wavelength λ is the wavelength of the mechanical wave formed when the actuator 13 located in the first actuating unit CH drives the cover plate 12 to vibrate, as shown in Figure 9.

[0118] Furthermore, the first distance d1 is less than or equal to half of the first wavelength λ.

[0119] In a specific implementation, the smaller the first distance d1 is, the better, thereby producing a more delicate tactile effect.

[0120] Exemplarily, as shown in FIG9 , the mechanical wave generated by the actuator 13 in the first actuating unit CH driving the cover plate 12 to vibrate is a Lamb wave.

[0121] To achieve the air squeeze film effect, illustratively, half of the first wavelength λ may be less than or equal to the width of a finger, where the width of the finger is, for example, 10 mm to 15 mm.

[0122] Exemplarily, the first wavelength λ is proportional to the size of the cover plate 12 in the first direction f1. For example, the first wavelength λ is a positive integer multiple of the size of the cover plate 12 in the first direction f1.

[0123] Exemplarily, the actuator 13 in the first actuating unit CH may be an integrated continuous structure. For example, the actuator 13 in the first actuating unit CH may be an integrated strip-shaped actuator 13 extending along the third edge s3 .

[0124] It should be noted that the first distance d1 may also be greater than or equal to the second distance d2, and this disclosure does not limit this.

[0125] In some embodiments, the size of the actuator 13 in the first direction f1 is greater than or equal to one eighth of the first wavelength λ, and less than or equal to one half of the first wavelength λ, where the first wavelength λ is the wavelength of the mechanical wave formed when the actuator 13 located in the first actuating unit CH drives the cover plate 12 to vibrate, as shown in FIG9 .

[0126] Because the mechanical waves generated by the high-frequency vibration of actuator 13 propagate along first direction f1 and have a relatively short wavelength, excessively large dimensions of actuator 13 in first direction f1 will hinder deformation of cover plate 12 due to the rigidity of actuator 13. In this embodiment, limiting the dimensions of actuator 13 in first direction f1 to within the aforementioned range facilitates the formation of regular mechanical vibration interference fringes.

[0127] The actuator 13 in this embodiment may be the actuator 13 located in the first actuator unit CH, or the actuator 13 located in the second actuator unit CL.

[0128] Exemplarily, as shown in any one of FIG. 5 to FIG. 7 , the first direction f1 is a vertical direction, that is, the length of the actuator 13 along the vertical direction is greater than or equal to one eighth of the first wavelength λ and less than or equal to one half of the first wavelength λ.

[0129] Exemplarily, as shown in FIG9 , the first direction f1 is the horizontal direction, that is, the width of the actuator 13 along the horizontal direction is greater than or equal to one eighth of the first wavelength λ and less than or equal to one half of the first wavelength λ.

[0130] In some embodiments, as shown in FIG9 , the actuator 13 is located at the peak (as shown in FIG9 ) or trough of the first mechanical wave, and the first mechanical wave is a mechanical wave formed when the actuator 13 located in the first actuating unit CH drives the cover plate 12 to vibrate.

[0131] The actuator 13 in this embodiment may be the actuator 13 located in the first actuator unit CH (as shown in FIG. 9 ), or may be the actuator 13 located in the second actuator unit CL.

[0132] In this embodiment, the actuator 13 is arranged at a position avoiding a node point, which is beneficial for enhancing the vibration amplitude of the first mechanical wave.

[0133] In some embodiments, as shown in any one of FIG. 5 to FIG. 7 , the cover plate 12 includes two fifth edges s5 disposed near the two third edges s3 , and the two fifth edges s5 are parallel to each other.

[0134] Exemplarily, as shown in any one of FIG. 5 to FIG. 7 , the upper and lower sides of the rectangular display surface Sd are two third edges s3 , and the upper and lower sides of the cover plate 12 are two fifth edges s5 parallel to each other.

[0135] Exemplarily, as shown in any one of FIG. 5 to FIG. 7 , the distance between the two fifth edges s5 is substantially the same at different positions. Furthermore, the fifth edge s5 may be parallel to the third edge s3 .

[0136] In this embodiment, the two mutually parallel fifth edges s5 are two regular edges of the cover plate 12. The fifth edge s5 is disposed near the third edge s3, and the first actuation group GH is disposed near the third edge s3. Therefore, the first actuation group GH is disposed near the fifth edge s5. By disposing the first actuation group GH near the regular fifth edge s5, regular high-frequency mechanical vibration interference fringes are formed, thereby achieving a better tactile feedback effect.

[0137] In some embodiments, as shown in FIG. 5 to FIG. 7 , the cover plate 12 includes two sixth edges s6 disposed near the two fourth edges s4 , and the two sixth edges s6 are parallel to or cross each other.

[0138] Exemplarily, as shown in FIG. 5 a, b, c or e, the left and right sides of the rectangular display surface Sd are two fourth edges s4, and the left and right sides of the rectangular cover plate 12 are two sixth edges s6 parallel to each other.

[0139] For example, as shown in FIG. 5 to FIG. 7 d or f, the upper and lower sides of the rectangular display surface Sd are two fourth edges s4, and the upper and lower sides of the cover plate 12 are two sixth edges s6 parallel to each other.

[0140] 6 , the left and right sides of the rectangular display surface Sd are two fourth edges s4 , and the left and right sides of the hyperbolic cover plate 12 are two sixth edges s6 that intersect each other.

[0141] Exemplarily, as shown in FIG. 7 a, b, c or e, the left and right sides of the rectangular display surface Sd are two fourth edges s4, and the left and right sides of the trapezoidal cover plate 12 are two sixth edges s6 that intersect each other.

[0142] When the two sixth edges s6 are parallel to each other, the distance between the two sixth edges s6 is substantially the same at different positions. Furthermore, the sixth edge s6 and the fourth edge s4 may be parallel to each other.

[0143] When the two sixth edges s6 intersect with each other, the distance between the two sixth edges s6 is different at at least two positions. Furthermore, the sixth edge s6 and the fourth edge s4 may intersect with each other.

[0144] In this embodiment, the two mutually parallel sixth edges s6 represent two regular edges of the cover plate 12. The second actuating group GL can be positioned near the fourth edge s4 and the regular sixth edge s6. The two intersecting sixth edges s6 represent two irregularly shaped edges of the cover plate 12. The sixth edge s6 is positioned near the fourth edge s4, and the second actuating group GL is positioned near both the fourth edge s4 and the sixth edge s6. Positioning the second actuating group GL near the irregularly shaped sixth edge s6 ensures proper low-frequency vibration and fully utilizes the edge space. Positioning the first actuating group GH near the irregularly shaped sixth edge s6 makes it difficult to form regular high-frequency mechanical vibration interference fringes.

[0145] It should be noted that, as shown in FIG. 5 to FIG. 7 d or f, the third edge s3 is the same as the fourth edge s4, and correspondingly, the fifth edge s5 is the same as the sixth edge s6.

[0146] In some embodiments, as shown in FIG8 b, the touch display panel 11 includes a flexible display panel, the display surface Sd of the flexible display panel is a curved surface, and the third edge s3 is perpendicular to a curved arc s7 of the curved surface. The curved arc s7 may be an arc with a bending radius R as a radius.

[0147] In this embodiment, since the third edge s3 is perpendicular to the curved arc s7 of the curved surface, disposing the first actuating group GH near the third edge s3 is conducive to forming regular high-frequency mechanical vibration interference fringes, thereby achieving better tactile feedback effect.

[0148] In some embodiments, as shown in any one of FIG. 5 to FIG. 7 , the two second actuating units CL located in the same second actuating group GL include: a second actuating unit CL1 and a second actuating unit CL2 .

[0149] In one example, the vibration waveform generated by the actuator 13 in the second actuation unit CL1 has the same phase as the vibration waveform generated by the actuator 13 in the second actuation unit CL2 .

[0150] In this example, drive signals with the same phase can be provided to the actuator 13 in the second actuator unit CL1 and the actuator 13 in the second actuator unit CL2, so that the actuator 13 in the second actuator unit CL1 and the actuator 13 in the second actuator unit CL2 generate vibration waveforms with the same phase.

[0151] Since the resonant waveform of low-frequency vibration is a first-order resonant mechanical wave, the waveform obtained by superimposing two vibration waveforms with the same phase is shown in the left figure of Figure 10. The two sides are nodes and the middle is the peak / trough. The vibration at the peak position is the strongest, and the vibration at the node position is weaker. In addition, the resonant frequency may not be within the frequency range of 100Hz-500Hz where the human body has the strongest tactile perception.

[0152] In another example, the vibration waveform generated by the actuator 13 in the second actuation unit CL1 has a phase opposite to that of the vibration waveform generated by the actuator 13 in the second actuation unit CL2 .

[0153] In this example, drive signals with opposite phases may be provided to the actuator 13 in the second actuating unit CL1 and the actuator 13 in the second actuating unit CL2, so that the actuator 13 in the second actuating unit CL1 and the actuator 13 in the second actuating unit CL2 generate vibration waveforms with opposite phases.

[0154] In this way, the waveform obtained by superimposing two vibration waveforms with opposite phases is shown in the right figure in Figure 10, with three nodes. There is a peak / trough between every two nodes, thus forming two peak / trough areas with larger amplitudes, which can increase the area range of large-amplitude vibration and adjust the resonant frequency to the frequency range of 100Hz-500Hz where the human body's tactile perception is strongest.

[0155] In some embodiments, as shown in d or f in any one of Figures 5 to 7 , the touch display panel 11 includes a pair of long sides and a pair of short sides, and the two fourth edges s4 are the pair of long sides of the touch display panel 11. In this way, the distance between the two second actuating units CL can be shortened, and the effect of oppositely actuating the two second actuating units CL is more obvious.

[0156] In some embodiments, as shown in Figure b in Figure 8, the touch display panel 11 includes a flexible display panel, the display surface Sd of the flexible display panel is a curved surface, the curved surface has a curved arc s7 with a bending radius R, and the size of the actuator 13 along the curved arc s7 is greater than or equal to R / 60 and less than or equal to R / 20.

[0157] In this way, the fitting gap caused by the actuator 13 being too large along the bending arc s7 direction can be avoided, and the loose fitting caused by the actuator 13 being too small along the bending arc s7 direction can also be avoided, which is beneficial to improving the reliability of the tactile feedback module.

[0158] Exemplarily, as shown in any one of Figures 5 to 7, the direction of the bending arc s7 is parallel to the first direction f1, ie, the vertical direction, and the length of the actuator 13 in the vertical direction is greater than or equal to R / 60 and less than or equal to R / 20.

[0159] Exemplarily, as shown in Figure b in any one of Figures 5 to 7, the direction of the bending arc s7 is parallel to the second direction f2, that is, the horizontal direction, and the width of the actuator 13 in the horizontal direction is greater than or equal to R / 60 and less than or equal to R / 20.

[0160] The actuator 13 mentioned in the present disclosure, unless otherwise specified, may be the actuator 13 located in the first actuator unit CH or the actuator 13 located in the second actuator unit CL.

[0161] In some embodiments, the touch display panel 11 includes a flexible display panel. The flexible display panel can be flat or curved, which is not limited in the present disclosure.

[0162] In some embodiments, as shown in FIG8 a, the touch display panel 11 includes a flexible display panel, the display surface Sd of the flexible display panel is a plane, and the surface of the cover plate 12 close to the flexible display panel is a plane parallel to the display surface Sd.

[0163] In some embodiments, as shown in FIG8 b , the touch display panel 11 includes a flexible display panel, the display surface Sd of the flexible display panel is a curved surface, and the surface of the cover plate 12 close to the flexible display panel is a curved surface parallel to the display surface Sd.

[0164] In some embodiments, the actuator 13 is rigidly connected to the touch display panel 11 or the cover plate 12. This ensures that the actuator 13 can drive the touch display panel 11 or the cover plate 12 to vibrate together without causing too much vibration attenuation at the connection position.

[0165] Of course, the actuator 13 and the touch display panel 11 or the cover plate 12 may also be flexibly connected, which is not limited in the present disclosure.

[0166] For example, the rigid connection can be achieved by gluing with hard glue such as epoxy resin glue, by metal welding, or by mechanical connectors such as screws.

[0167] Exemplarily, the flexible connection can be connected by pasting with soft glue. The soft glue can be, for example, double-sided tape, VHB tape (polyacrylate double-sided foam tape), silicone and other flexible tapes, and can also be liquid glue such as polyurethane glue. This disclosure does not limit this.

[0168] In some embodiments, the touch display panel 11 and the cover plate 12 are rigidly connected to each other, so as to ensure that the touch display panel 11 and the cover plate 12 vibrate together without causing too much vibration attenuation at the connection position.

[0169] For example, the actuator 13 is a device that utilizes the inverse piezoelectric effect of piezoelectric materials. The inverse effect of the "direct piezoelectric effect," that is, the elastic deformation of a dielectric under the drive of an electrical signal, is called the "inverse piezoelectric effect."

[0170] In some embodiments, the actuator 13 includes at least one of the following: PZT piezoelectric film, monolithic piezoelectric ceramic, stacked piezoelectric ceramic, cymbal-type piezoelectric ceramic, monolithic polyvinylidene fluoride film, stacked polyvinylidene fluoride film, cymbal-type polyvinylidene fluoride film, and linear motor, etc.

[0171] For example, the shape of the actuator 13 may be circular, elongated, or cymbal-shaped, which is not limited in the present disclosure.

[0172] Compared with the single-piece structure, the actuator 13 with the stacked structure and the cymbal-shaped structure has the characteristics of low voltage drive, stronger vibration and larger displacement, and is more suitable for achieving tactile feedback effects on large-sized and heavy-weight tactile feedback modules.

[0173] Exemplarily, the actuator 13 includes piezoelectric ceramics, and a row of actuators 13 are arranged in sequence along one edge of the touch display panel 11. For a touch display panel 11 that is less than or equal to 10 inches, the number of actuators 13 in a row can be 2-5; for a touch display panel 11 that is greater than or equal to 10 inches and less than or equal to 20 inches, the number of actuators 13 in a row can be 6-12; for a touch display panel 11 that is greater than or equal to 20 inches, the number of actuators 13 in a row can be 10-20. It should be noted that the number of actuators 13 in a row is related to the required tactile feedback effect, screen size, weight, and type of actuator 13. The specific number can be set according to actual needs, and this disclosure does not limit this.

[0174] The present disclosure further provides a tactile feedback device, as shown in FIG12 . The tactile feedback device includes: a tactile feedback module 121 as provided in any embodiment; and a driving component 122, respectively connected to the touch display panel 11 and the actuator 13, for driving the touch display panel 11 to display an image. The driving component 122 outputs a driving signal to the actuator 13 based on touch information from a touch-sensitive object on the touch display panel 11, so that the actuator 13 vibrates the cover plate 12 in response to the driving signal, thereby generating tactile feedback on the surface of the cover plate 12 facing away from the touch display panel 11, i.e., the touch surface St. The touch information includes at least one of the following: touch position, touch duration, and touch action.

[0175] Those skilled in the art will appreciate that the tactile feedback device provided herein has the advantages of the aforementioned tactile feedback module. The tactile feedback device provided herein can be integrated into products such as laptops and monitors, and can be used as a display screen in a variety of fields, including in-vehicle displays and consumer electronics, providing users with a rich and realistic tactile experience.

[0176] As shown in FIG12 , the driving component 122 drives the touch display panel 11 to display an interactive screen. When the touch-sensitive object performs a touch operation on the touch display panel 11, the touch display panel 11 can detect the touch information. The driving component 122 generates a driving signal based on the detected touch information. The driving signal is used to drive the actuator 13 to vibrate the cover 12, thereby generating a tactile feedback effect on the touch surface St. Based on the tactile feedback, the operator can confirm whether their operation is correct and whether the desired effect can be achieved.

[0177] Exemplarily, the driving component 122 may be a vehicle system or a PC host computer, etc.

[0178] For example, the driving component 122 may first determine whether tactile feedback needs to be stimulated based on the detected touch information; if so, a driving signal is generated.

[0179] In some embodiments, the connections between the plurality of actuators 13 and the driving assembly are in parallel, so that the driving assembly can independently drive each actuator 13 .

[0180] For example, the touch display panel 11 may include a touch circuit and a display panel, wherein the touch circuit may be integrated into the display panel or may be provided independently of the display panel, for example, the touch circuit may be attached between the display panel and the cover plate 12 .

[0181] The touch circuit is used to detect touch information of the touch object on the touch display panel 11. The touch information may include one or more of the touch position, touch time, and touch action. The touch action may be, for example, a finger gesture, such as clicking, sliding, and sliding trajectory.

[0182] In some embodiments, the touch circuit may be a capacitive touch circuit or a resistive touch circuit, which is not limited in the present disclosure.

[0183] For a capacitive touch circuit, when a touch object such as a user's finger touches the touch display panel 11, the touch capacitance of the touch drive electrode and the touch sensing electrode in the touch circuit at the touch position will change. The touch traces in the touch circuit can send the touch capacitance at each position to the drive component 122, and the drive component 122 can determine the touch position based on the touch capacitance at each position.

[0184] In some embodiments, the driving component 122 may include a controller and a driver. For example, when a touch-sensitive object applies a touch operation to the touch display panel 11, the controller responds to the touch operation and outputs a driving signal in the form of a digital signal to the driver based on the touch information detected by the touch display panel 11. The driver performs digital-to-analog conversion on the driving signal in the form of a digital signal, generates an analog signal, and sends the driving signal to the actuator 13. The actuator 13 vibrates under the drive signal, thereby driving the touch display panel 11 to vibrate, thereby generating tactile feedback.

[0185] Illustratively, the controller may include at least one of the following: a microcontroller unit (MCU), and an FPGA (Field Programmable Gate Array), etc., which is not limited in this embodiment.

[0186] Exemplarily, when the tactile feedback device is applied to a terminal, the driving component 122 may be a processor in the terminal.

[0187] In some embodiments, as shown in FIG12 , the tactile feedback device may further include: an amplifying circuit 123 , connected to the driving component 122 and the actuator 13 , respectively, for amplifying the driving signal output by the driving component 122 and sending the amplified signal to the actuator 13 .

[0188] In some embodiments, the display panel is a self-luminous display panel, and the self-luminous display panel has a built-in light-emitting device, which can 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), etc.

[0189] The present disclosure further provides a driving method for a tactile feedback module, which is applied to the tactile feedback module shown in any one of FIG. 5 to FIG. 7 , and the driving method includes:

[0190] Step S01: Apply drive signals of the same phase to the actuators 13 of the two second actuating units CL located in the same second actuating group GL, so that the actuators 13 of the two second actuating units CL located in the same second actuating group GL generate vibration waveforms of the same phase; or, apply drive signals of opposite phases to the actuators 13 of the two second actuating units CL located in the same second actuating group GL, so that the actuators 13 of the two second actuating units CL located in the same second actuating group GL generate vibration waveforms of opposite phases.

[0191] Exemplarily, as shown in any one of FIG. 5 to FIG. 7 , the two second actuating units CL located in the same second actuating group GL include: a second actuating unit CL1 and a second actuating unit CL2 .

[0192] In one example, drive signals with the same phase are applied to the actuator 13 located in the second actuating unit CL1 and the actuator 13 located in the second actuating unit CL2 so that the vibration waveforms generated by the actuator 13 located in the second actuating unit CL1 and the actuator 13 located in the second actuating unit CL2 have the same phase.

[0193] Since the resonant waveform of low-frequency vibration is a first-order resonant mechanical wave, the waveform obtained by superimposing two vibration waveforms with the same phase is shown in the left figure of Figure 10. The two sides are nodes and the middle is the peak / trough. The vibration at the peak position is the strongest, and the vibration at the node position is weaker. In addition, the resonant frequency may not be within the frequency range of 100Hz-500Hz where the human body has the strongest tactile perception.

[0194] In another example, drive signals with opposite phases are applied to the actuator 13 located in the second actuating unit CL1 and the actuator 13 located in the second actuating unit CL2 so that the vibration waveforms generated by the actuator 13 located in the second actuating unit CL1 and the actuator 13 located in the second actuating unit CL2 have opposite phases.

[0195] In this way, the waveform obtained by superimposing two vibration waveforms with opposite phases is shown in the right figure in Figure 10, with three nodes. There is a peak / trough between every two nodes, thus forming two peak / trough areas with larger amplitudes, which can increase the area range of large-amplitude vibration and adjust the resonant frequency to the frequency range of 100Hz-500Hz where the human body's tactile perception is strongest.

[0196] In some embodiments, as shown in FIG. 5 d or FIG. 7 , the touch display panel 11 includes a pair of long sides and a pair of short sides, and the two fourth edges s4 are the pair of long sides of the touch display panel 11 .

[0197] Since the second actuating unit CL is disposed close to the fourth edge s4 , by setting the two fourth edges s4 as a pair of long sides, the distance between the two second actuating units CL can be shortened, and the effect of reversely exciting the two second actuating units CL is more obvious.

[0198] In the present disclosure, “a plurality of” means two or more, and “at least one” means one or more, unless otherwise clearly defined.

[0199] In the present disclosure, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on the present disclosure.

[0200] As used herein, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, product, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, commodity, or apparatus that includes the element.

[0201] References herein to "one embodiment," "some embodiments," "exemplary embodiments," "one or more embodiments," "an example," "an example," "some examples," and the like are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of the present disclosure. Schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be included in any one or more embodiments or examples in any suitable manner.

[0202] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any actual relationship or order between these entities or operations.

[0203] When describing some embodiments, the expressions "coupled" and "connected" may be used. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components are in direct physical or electrical contact with each other. For another example, when describing some embodiments, the term "coupled" may be used to indicate that two or more components are in direct physical or electrical contact. However, the term "coupled" or "communicatively coupled" may also mean that two or more components are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0204] “At least one of A, B and C” has the same meaning as “at least one of A, B or C” and both include the following combinations of A, B and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B and C.

[0205] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0206] As used herein, the term "if" is optionally interpreted to mean "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined that" or "if [stated condition or event] is detected" are optionally interpreted to mean "upon determining" or "in response to determining" or "upon detecting [stated condition or event]" or "in response to detecting [stated condition or event]," depending on the context.

[0207] The use of "for" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0208] The use of "based on" or "according to" in this document is intended to be open and inclusive. A process, step, calculation, or other action based on one or more stated conditions or values ​​may, in practice, be based on other conditions or values ​​beyond the stated values. A process, step, calculation, or other action based on one or more stated conditions or values ​​may, in practice, be based on other conditions or values ​​beyond the stated values.

[0209] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0210] As used herein, "parallel", "perpendicular", "equal", and "flush" include the situations described and situations similar to the situations described, the range of which is within an acceptable deviation range, wherein the acceptable deviation range is as determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity can also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, the difference between the two being equal is less than or equal to 5% of either one. "Flush" includes absolute equality and approximate flushness, wherein the acceptable deviation range of approximate flushness can be, for example, the distance between the two being flush is less than or equal to 5% of either one's size.

[0211] It will be understood that when a layer or element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present therebetween.

[0212] Exemplary embodiments are described herein with reference to cross-sectional and / or plan views that are idealized exemplary drawings. In the drawings, the thicknesses of layers and regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Therefore, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include deviations in shape due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0213] 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 tactile feedback module, comprising: A touch display panel, comprising a display surface; A cover plate, arranged on one side of the touch display panel and close to the display surface; as well as A plurality of actuators are arranged on the same side of the cover plate as the touch display panel, and the actuators are used to drive the cover plate to vibrate in response to a driving signal to generate tactile feedback on a surface of the cover plate away from the touch display panel; Wherein, the actuator is arranged close to the edge of the touch display panel.

2. The tactile feedback module according to claim 1, wherein: At least one of the actuators is located on a side of the touch display panel facing away from the cover plate, and an orthographic projection of at least one of the actuators on the cover plate is within a range of an orthographic projection of the touch display panel on the cover plate.

3. The tactile feedback module according to claim 1 or 2, wherein: At least one of the actuators is located on a side of the cover plate close to the touch display panel, and an orthographic projection of at least one of the actuators on the cover plate is located outside the orthographic projection range of the touch display panel on the cover plate and within the edge of the cover plate.

4. The tactile feedback module according to any one of claims 1 to 3, wherein: The plurality of actuators are disposed near a second edge of the touch display panel, and the plurality of actuators disposed near the second edge are arranged in a direction parallel to the second edge.

5. The tactile feedback module according to any one of claims 1 to 4, wherein: The plurality of actuators are divided into at least one actuation group, the actuation group is divided into two actuation units, and each of the actuation units includes at least one actuator; and The two actuating units in the same actuating group are respectively arranged close to different edges of two oppositely arranged edges of the touch display panel.

6. The tactile feedback module according to claim 5, wherein: The two actuating units in the same actuating group are symmetrically arranged and include the same number of actuators.

7. The tactile feedback module according to claim 5 or 6, wherein: The at least one actuation group comprises: The first actuation group is used to generate vibration of a first frequency. The actuation unit located in the first actuation group is a first actuation unit. Two first actuation units located in the same first actuation group are close to the first actuation unit. The touch display panel is provided with two third edges, and the two third edges are arranged opposite to each other along the first direction; and / or A second actuation group, used for generating vibration of a second frequency, wherein the actuation unit in the second actuation group is a second actuation unit, and two second actuation units in the same second actuation group are arranged near two fourth edges of the touch display panel, and the two fourth edges are arranged opposite to each other along the second direction; The first frequency is greater than the second frequency, and the second direction is parallel to or crosses the first direction.

8. The tactile feedback module according to claim 7, wherein: The second direction is parallel to the first direction, and the first actuating unit is located on a side of the second actuating unit close to an edge of the cover plate.

9. The tactile feedback module according to claim 7 or 8, wherein: A plurality of actuators in the first actuation unit are arranged at equal intervals at a first interval in a direction parallel to the third edge; The plurality of actuators in the second actuation unit are arranged at equal intervals at a second interval in a direction parallel to the fourth edge; Wherein, the first spacing is less than or equal to the second spacing.

10. The tactile feedback module according to claim 9, wherein: The first spacing is less than or equal to a first wavelength, and the first wavelength is a wavelength of a mechanical wave formed when an actuator in the first actuation unit drives the cover plate to vibrate.

11. The tactile feedback module according to any one of claims 7 to 10, wherein: The size of the actuator in the first direction is greater than or equal to one eighth of the first wavelength and less than or equal to one half of the first wavelength. The first wavelength is the wavelength of the mechanical wave formed when the actuator in the first actuating unit drives the cover plate to vibrate.

12. The tactile feedback module according to any one of claims 7 to 11, wherein: The actuator is located at a crest or trough of a first mechanical wave, and the first mechanical wave is a mechanical wave formed when the actuator located in the first actuating unit drives the cover plate to vibrate.

13. The tactile feedback module according to any one of claims 7 to 12, wherein: The cover plate includes two fifth edges disposed near the two third edges, and two sixth edges disposed near the two fourth edges; and The two fifth edges are parallel to each other, and the two sixth edges are parallel to each other or cross each other.

14. The tactile feedback module according to any one of claims 7 to 13, wherein: The touch display panel comprises a flexible display panel, a display surface of the flexible display panel is a curved surface, and the third edge is perpendicular to a bending arc of the curved surface.

15. The tactile feedback module according to any one of claims 7 to 14, wherein: The touch display panel includes a pair of long sides and a pair of short sides, and the two fourth edges are the pair of long sides of the touch display panel.

16. The tactile feedback module according to any one of claims 1 to 15, wherein: The touch display panel comprises a flexible display panel, the display surface of the flexible display panel is a curved surface, and the curved surface has a curved arc with a bending radius of R; and The dimension of the actuator along the bending arc direction is greater than or equal to R / 60 and less than or equal to R / 20.

17. The tactile feedback module according to any one of claims 1 to 16, wherein the touch display panel comprises a flexible display panel; in, The display surface of the flexible display panel is a plane, and the surface of the cover plate close to the flexible display panel is a plane parallel to the display surface; or The display surface of the flexible display panel is a curved surface, and the surface of the cover plate close to the flexible display panel is a curved surface parallel to the display surface.

18. The tactile feedback module according to any one of claims 1 to 17, wherein: The actuator includes at least one of the following: a PZT piezoelectric film, a monolithic piezoelectric ceramic, a stacked piezoelectric ceramic, a cymbal-type piezoelectric ceramic, a monolithic polyvinylidene fluoride film, a stacked polyvinylidene fluoride film, a cymbal-type polyvinylidene fluoride film, and a linear motor.

19. A tactile feedback device, comprising: The tactile feedback module according to any one of claims 1 to 18; as well as A driving component is respectively connected to the touch display panel and the actuator, and is used to drive the touch display panel to display an image, and output a driving signal to the actuator according to touch information of the touch body on the touch display panel, so that the actuator responds to the driving signal and drives the cover plate to vibrate, so as to generate tactile feedback on the surface of the cover plate away from the touch display panel, wherein the touch information includes at least one of the following: touch position, touch time and touch action.

20. The tactile feedback device according to claim 19, wherein: The connections between the plurality of actuators and the driving assembly are respectively in parallel, so that the driving assembly can independently drive each actuator.

21. A driving method of a tactile feedback module, applied to the tactile feedback module according to any one of claims 7 to 15, the driving method comprising: Applying driving signals with the same phase to the actuators of the two second actuating units in the same second actuating group, so that the actuators of the two second actuating units in the same second actuating group generate vibration waveforms with the same phase; or Driving signals with opposite phases are applied to the actuators of the two second actuating units in the same second actuating group, so that the actuators of the two second actuating units in the same second actuating group generate vibration waveforms with opposite phases.

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