Broadband vibration touchpad, touch equipment, display device, tablet and electronic equipment

Abstract

The invention discloses a touchpad with a broadband vibration function and touch equipment, the touchpad comprises a base and a touch panel, the touch panel is connected with the base and can move relative to the base, the touch panel is connected with a frequency expanding device, and the frequency expanding device is connected with the base. The frequency expanding device is arranged to be capable of vibrating relative to the touch panel when the touch panel vibrates due to driving force, and the vibration is transmitted to the touch panel so as to influence the vibration frequency of the touch panel. According to the scheme, the frequency expanding device is arranged to vibrate relative to the touch panel, namely, the vibration freedom degree is increased for the touch panel, the vibration frequency of the touch panel can be expanded on the basis of the vibration frequency formed by an original power source, and therefore vibration feedback in a wider frequency range is achieved; the vibration feedback vibration frequency range can effectively cover the touch perception frequency range, so that a vivid physical mechanical key simulation object feeling vibration feedback effect can be realized.

Description

Technical Field

[0001] The present application relates to the technical field of tactile feedback, and in particular to a touch panel, a touch device, a display device, a conference tablet and an electronic device with a broadband vibration function. Background Art

[0002] A touchpad is a device that senses the position and movement of the user's fingers through a touch sensor, thereby controlling the movement of the cursor on the display interface of an electronic device. Conventional touchpads generally detect the user's pressing actions through physical buttons to perform functions such as confirmation or calling up menus. In order to improve the convenience of touchpad operation, pressure touchpads are gradually becoming a new trend. Pressure touchpads eliminate the physical buttons of conventional touchpads and set up pressure sensors and touch feedback devices to perform functions such as pressure sensing and vibration feedback.

[0003] Related research and actual measurements have found that the vibration acceleration generated by a physical mechanical key during the pressing process is a wide-band single-frequency vibration waveform. In order to truly simulate the real tactile feedback effect of a physical mechanical key through vibration feedback, the touchpad needs to have a certain vibration response within a wide frequency range. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a touch panel with a wide-band vibration function, which adjusts the natural vibration frequency distribution of the system by increasing the degrees of freedom of the vibration system to achieve a wider vibration system frequency band without increasing the number of vibration motors and customizing vibration motors and significantly increasing costs.

[0005] To achieve the above objectives, this application adopts the following technical solutions:

[0006] In a first aspect, a touch panel with a broadband vibration function is provided, comprising a base and a touch panel, wherein the touch panel is connected to the base and can move relative to the base, and a frequency extension device is connected to the touch panel, wherein the frequency extension device is configured such that when the touch panel is vibrated by a driving force, the frequency extension device can vibrate relative to the touch panel and transmit the vibration to the touch panel to affect the vibration frequency of the touch panel.

[0007] In a second aspect, a touch device is provided, including a display screen and a touch panel, wherein the touch panel is the touch panel with a broadband vibration function as described above.

[0008] In a third aspect, a vehicle-mounted central control display device is provided, comprising a touch panel with a wide-band vibration function as described above.

[0009] In a fourth aspect, a conference tablet is provided, comprising the touch panel with broadband vibration function as described above.

[0010] In a fifth aspect, an electronic device is provided, comprising the touch panel with broadband vibration function as described above.

[0011] The beneficial effects of the present application are as follows: in the present scheme, by setting up a frequency extension device, vibration can be generated relative to the touch panel, which is equivalent to increasing the vibration freedom of the touch panel, and can broaden the vibration frequency of the touch panel on the basis of the vibration frequency formed by the original power source, thereby achieving vibration feedback in a wider frequency range, so that its vibration feedback vibration frequency range can effectively cover the frequency range of tactile perception, achieve broadband vibration, and obtain an ideal waveform, so as to achieve a realistic physical mechanical button simulated vibration feedback effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present application is further described in detail below based on the drawings and embodiments.

[0013] Figure 1 Schematic diagram of the structure of a touch panel with broadband vibration function according to an embodiment of the present application.

[0014] Figure 2 This is a schematic structural diagram of a touch panel with broadband vibration function according to another embodiment of the present application.

[0015] Figure 3 This is a schematic structural diagram of a touch panel with a broadband vibration function according to yet another embodiment of the present application.

[0016] Figure 4 This is a schematic structural diagram of a touch panel with a broadband vibration function according to yet another embodiment of the present application.

[0017] Figure 5 This is a schematic structural diagram of a touch panel with a broadband vibration function according to yet another embodiment of the present application.

[0018] Figure 6 This is a schematic structural diagram of a touch panel with a broadband vibration function according to yet another embodiment of the present application.

[0019] Figure 7 This is a schematic structural diagram of a touch panel with a broadband vibration function according to yet another embodiment of the present application.

[0020] Figure 8 This is a schematic structural diagram of a touch panel with a broadband vibration function according to yet another embodiment of the present application.

[0021] Fig. 9 This is a schematic structural diagram of a touch panel with a broadband vibration function according to yet another embodiment of the present application.

[0022] Fig.10 This is a schematic structural diagram of a touch panel with a broadband vibration function according to yet another embodiment of the present application.

[0023] Fig.11 for Fig.10 Enlarged view of point I in the middle.

[0024] Fig.12 This is a schematic structural diagram of a touch panel with a broadband vibration function according to yet another embodiment of the present application.

[0025] Fig.13 for Fig.12 Enlarged view of point II in the middle.

[0026] Fig.14 This is a schematic structural diagram of a touch panel with a broadband vibration function according to yet another embodiment of the present application.

[0027] Fig.15 for Fig.14 Enlarged view of point III in the middle.

[0028] Fig.16 This is a schematic structural diagram of a touch panel with a broadband vibration function according to yet another embodiment of the present application.

[0029] Fig.17 This is a schematic structural diagram of a touch panel with a broadband vibration function according to yet another embodiment of the present application.

[0030] Fig.18 This is a comparison chart of the vibration frequency curve of a two-degree-of-freedom vibration system and the vibration frequency curve of a three-degree-of-freedom vibration system.

[0031] Fig.19 A schematic diagram of the structure of the vehicle-mounted central control display device provided in an embodiment of the present application.

[0032] Fig. 20 A schematic diagram of the conference tablet structure provided in an embodiment of the present application.

[0033] In the figure:

[0034] 100, base; 200, touch panel; 300, linear motor; 400, additional mass; 510, first elastic connector; 520, second elastic connector; 530, third elastic connector; 610, limiting boss; 620, limiting groove; 710, vibration frequency curve of two-degree-of-freedom vibration system; 720, vibration frequency curve of three-degree-of-freedom vibration system. DETAILED DESCRIPTION

[0035] In order to make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0036] In the description of this application, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] Haptics refers to the technology of transmitting information through skin sensory feedback such as force and vibration. The main manifestation of tactile feedback on the terminal is "vibration". A typical tactile technology system is a combination of several sub-modules, namely: a tactile interface with a capacitive button, a processor, a drive circuit and an actuator. The input of the tactile technology system can be touch. When the touch screen is pressed, the sensor in the device senses the change in the applied force and the change in the input angle and sends the information to the processor. The information is further processed to generate a waveform that can be an analog or digital waveform as the input of the drive circuit, and specific instructions are provided to the actuator to generate a vibration pattern. The feedback from the actuator is returned to the touch screen device as feedback, so the user virtually feels this feedback. In handheld electronic products, such as smart phones, smart watches, smart bracelets, game controllers, tablets, etc., tactile feedback is more helpful to improve the sense of interaction, so that users can have an immersive experience; while for non-handheld products, such as car central control systems, traditional physical buttons in the cockpit are gradually replaced by touch screens and smart surfaces. Tactile feedback technology can improve driving safety and experience and prevent misoperation.

[0039] For non-handheld touch devices, there is a related technical solution that uses an electromagnetic coil structure to generate magnetic force as an excitation source. The advantages of this solution are that the vibration system is simple, the excitation force is large, the stroke is large, and the vibration frequency band is wide, which is convenient for precise control to produce realistic tactile feedback. However, it also has the disadvantages of complex overall structure, customized design required for different usage scenarios, and high cost. At the same time, piezoelectric ceramics are also used to generate vibration feedback. This solution often requires multiple piezoelectric ceramic sheets, and there are disadvantages such as uneven distribution of vibration and complex control. There are also vibration motors used as excitation sources to achieve vibration feedback, such as linear motors, piezoelectric ceramic motors, etc., but they are limited by the fact that the resonant frequency of current micro motors is relatively single, such as 170Hz, and the quality factor is high, resulting in a narrow bandwidth of the touch panel, which cannot effectively cover the frequency range of tactile perception, resulting in a lack of richness in vibration response, and can only produce simple vibration feedback, and it is difficult to achieve a realistic physical mechanical button simulation effect.

[0040] In order to achieve a wide-band vibration effect through a vibration motor, there are two solutions in the related technology: 1. Increase the system damping of the micro motor by sacrificing the quality factor in exchange for a wider frequency band. This type of micro motor is often expensive and requires customization; 2. Use multiple micro motors with different resonant frequencies to piece together a wide-band vibration effect for the system. As the number of micro motors increases, the cost of the overall system also increases significantly.

[0041] It should be pointed out that the broadband vibration described in this scheme generally refers to vibration with a resonant frequency of tens to hundreds of Hz. This scheme aims to achieve broadband vibration based on a vibration source that can only produce a relatively single resonant frequency in conjunction with a mechanical structure. The specific broadband vibration resonant frequency range is not specifically limited.

[0042] In addition, in order to prevent the vibration energy of the touch panel from being transmitted to the interface connected to it, thereby causing wear on the interface, the related technology provides an elastic connector as a buffer and damping device at the connection between the base and the interface, but its purpose is only to achieve buffering and does not involve the control of vibration frequency.

[0043] Based on the problems existing in the related art, a solution of the embodiment of the present invention is proposed.

[0044] The present embodiment provides a touch panel with a broadband vibration function, comprising a base 100 and a touch panel 200. The touch panel 200 is connected to the base 100 and can move relative to the base 100. A frequency extension device is connected to the touch panel 200. The frequency extension device is configured to vibrate relative to the touch panel 200 when the touch panel 200 is vibrated by a driving force, and transmit the vibration to the touch panel 200 to affect the vibration frequency of the touch panel 200, so that the touch panel 200 can achieve broadband vibration and obtain an ideal waveform.

[0045] In the present solution, by setting up a frequency extension device, it can vibrate relative to the touch panel 200, which is equivalent to increasing the vibration freedom of the touch panel 200. It can widen the vibration frequency of the touch panel 200 on the basis of the vibration frequency formed by the original power source, thereby achieving vibration feedback in a wider frequency range. Without increasing the number of vibration motors and without using customized vibration motors, the vibration frequency range of the touch panel vibration feedback can effectively cover the frequency range of tactile perception, so as to achieve a realistic physical mechanical button simulated vibration feedback effect.

[0046] Specifically, the touch panel 200 is connected to the base 100 through an elastic connector, and a linear motor 300 is rigidly connected to the touch panel 200 to drive the touch panel 200 to vibrate, and vibration feedback is achieved under the recovery effect of the elastic structure. From the perspective of vibration, the system can be simply equivalent to a two-degree-of-freedom vibration system, and the addition of a frequency extension device that can vibrate relative to the touch panel 200 is equivalent to adding a degree of freedom that can vibrate freely to the original two-degree-of-freedom vibration system, forming a three-degree-of-freedom vibration system. Compared with the two-degree-of-freedom vibration system, the three-degree-of-freedom vibration system introduces a third resonant frequency on the basis of appropriately sacrificing the maximum vibration amount, and adjusts the natural frequency distribution of the system, thereby achieving broadband vibration.

[0047] Reference Fig.18 As shown, the figure shows a vibration frequency curve 710 of a two-degree-of-freedom vibration system and a vibration frequency curve 720 of a three-degree-of-freedom vibration system. It can be seen from the figure that the vibration frequency range of the three-degree-of-freedom vibration system is wider than the vibration frequency range of the two-degree-of-freedom vibration system.

[0048] It is understandable that a necessary condition for realizing vibration feedback in this solution is to have a power source that generates vibration. Therefore, this solution also includes a linear motor 300, which is installed on the touch panel 200 to provide a vibration feedback driving force for the touch panel. The specific connection structure between the linear motor 300 and the touch panel 200 can be in various forms, which will be illustrated in the subsequent embodiments of this application.

[0049] In order to achieve relative vibration between the frequency extension device and the touch panel 200, it is necessary to connect the frequency extension device and the touch panel 200 in a non-rigid connection manner. In an optional embodiment of the present application, the frequency extension device is elastically connected to the touch panel 200 via an elastic connector.

[0050] Under this structure, when the touch panel 200 is vibrated by the driving force, since the frequency extension device is connected to the touch panel 200, the vibration of the touch panel 200 will drive the frequency extension device to vibrate, and since the frequency extension device and the touch panel 200 are connected via an elastic connecting member, the vibration of the touch panel 200 will be changed by the elastic connecting member during the process of being transmitted to the frequency extension device, and the vibration of the frequency extension device will continue to be transmitted back to the touch panel 200 via the elastic connecting member, and continue to affect the vibration frequency of the touch panel 200. Due to such interaction, the vibration frequency of the touch panel 200 and the vibration frequency of the frequency extension device are superimposed, and ultimately the vibration frequency of the touch panel 200 is broadened relative to the natural vibration frequency of the vibration source that initially caused it to vibrate.

[0051] Specifically, refer to Figure 1 As shown, as an optional embodiment of the present application, the touch panel with broadband vibration function includes a base 100, a touch panel 200 and a frequency extension device, the frequency extension device includes the linear motor 300 and a second elastic connector 520, the touch panel 200 is installed on the base 100 through a first elastic connector 510, and the linear motor 300 is elastically connected to the touch panel 200 through the second elastic connector 520.

[0052] Furthermore, the embodiment of the present invention also provides a design concept of an elastic connector. Figure 1 Taking the three-degree-of-freedom vibration system as an example, the dynamic differential equation is established as follows:

[0053]

[0054]

[0055]

[0056] Wherein, m1 is the mass of the vibrator of the linear motor 300, m2 is the mass of the touch panel 200, and m3 is the mass of the housing of the linear motor 300; x1, represent the oscillator displacement, vibration velocity and vibration acceleration of the linear motor 300, respectively, x2, are the displacement, vibration velocity and vibration acceleration of the touch panel 200, x3, are the displacement, vibration velocity and vibration acceleration of the housing of the linear motor 300, k1 and c1 are the equivalent spring coefficient and damping coefficient inside the linear motor 300, k2 and c2 are the equivalent spring coefficient (i.e. stiffness) and damping coefficient of the first elastic connector 510 supporting the touch panel 200, k3 and c3 are the equivalent spring coefficient (i.e. stiffness) and damping coefficient of the second elastic connector 520 connecting the linear motor 300 and the touch panel 200, and F is the electromagnetic force inside the linear motor 300. The equivalent spring coefficient and damping coefficient of the second elastic connector 520 need to satisfy the above-mentioned dynamic differential equation, which can be derived and calculated based on the vibrator mass, housing mass and touch panel 200 mass of the linear motor 300, as well as the displacement, velocity and acceleration of the three, and the equivalent spring coefficient and damping coefficient inside the linear motor 300, and the equivalent spring coefficient and damping coefficient of the first elastic connector 510.

[0057] In this embodiment, the linear motor 300, on the one hand, serves as a driving force that is controlled by the controller to generate initial vibrations and transmits the initial vibrations to the vibration source of the touch panel 200. On the other hand, it also constitutes a frequency extension device. Since it is connected to the touch panel 200 via the second elastic connector 520, when its initial vibration is transmitted to the touch panel 200, it drives the touch panel 200 to vibrate, and it itself also vibrates and its position relative to the touch panel 200 changes, and it continues to vibrate at the new position. Due to the action of the second elastic connector 520, the vibrations of the two are not synchronized, and the vibrations continue to be transmitted to the touch panel 200 through the second elastic connector 520, so that the vibration frequency of the touch panel 200 is different from the natural frequency of the linear motor 300, thereby achieving the purpose of adjusting the vibration frequency of the touch panel 200.

[0058] It should be noted that the present application is not limited to the above-mentioned use of the linear motor 300 in combination with the elastic connector as the frequency extension device;

[0059] Reference Figure 2 , 3 As shown, in another optional embodiment of the present application, the touch panel with broadband vibration function includes a base 100, a touch panel 200 and a frequency extension device, the frequency extension device is an additional mass 400 and an elastic connector, the touch panel 200 is installed on the base 100 through a first elastic connector 510, and the additional mass 400 is elastically connected to the touch panel 200 through a second elastic connector 520.

[0060] The additional mass 400 described in this solution refers to a structure with a certain weight, which can move relative to the touch panel 200 during the vibration process, and has inertia due to its weight, thereby affecting the vibration frequency.

[0061] Furthermore, an embodiment of the present invention also provides a design concept for additional mass. Based on the known vibrator mass, housing mass and touch panel mass of the linear motor, as well as the displacement, velocity and acceleration of the three, and the equivalent spring coefficient and damping coefficient inside the linear motor, and the equivalent spring coefficient and damping coefficient of the first elastic connecting component, a corresponding three-degree-of-freedom vibration system is established for simulation analysis, so as to determine the appropriate size of the additional mass and the spring stiffness and damping coefficient of the second elastic connecting component.

[0062] by Figure 2 Taking the three-degree-of-freedom vibration system as an example, the dynamic differential equation is established as follows:

[0063]

[0064]

[0065]

[0066] Wherein, m1 is the mass of the vibrator of the linear motor 300, m2 is the mass of the touch panel 200, m3 is the mass of the housing of the linear motor 300, and m4 is the mass of the additional mass 400. The linear motor 300 and the additional mass 400 can be regarded as a connected whole in terms of structural connection; x1, represent the oscillator displacement, vibration velocity and vibration acceleration of the linear motor 300, respectively, x2, are the displacement, vibration velocity and vibration acceleration of the touch panel 200, x3, is the displacement, vibration velocity and vibration acceleration of the entire connection between the linear motor 300 and the additional mass 400, k1 and c1 are the equivalent spring coefficient and damping coefficient inside the linear motor 300, k2 and c2 are the equivalent spring coefficient (i.e. stiffness) and damping coefficient of the first elastic connection member 510 supporting the touch panel 200, k3 and c3 are the equivalent spring coefficient and damping coefficient of the elastic structure between the entire connection between the linear motor 300 and the additional mass 400 and the touch panel 200, and F is the electromagnetic force inside the motor. The equivalent spring coefficient and damping coefficient of the second elastic connection member 520 need to satisfy the above-mentioned dynamic differential equation, which can be derived and calculated based on the vibrator mass, housing mass and touch panel 200 mass of the linear motor 300, as well as the displacement, velocity and acceleration of the three, and the equivalent spring coefficient and damping coefficient inside the linear motor 300, and the equivalent spring coefficient and damping coefficient of the first elastic connection member 510.

[0067] The touch panel 200 is installed on the base 100 through the first elastic connector 510, and the additional mass 400 is connected to the touch panel 200 through the second elastic connector 520. When the touch panel 200 is vibrated relative to the base 100 by the vibration driving force, the touch panel 200 drives the additional mass 400 to form a relatively delayed vibration through the second elastic connector 520. The vibration of the additional mass 400 in turn affects the vibration frequency of the touch panel 200, thereby widening the vibration frequency of the touch panel 200.

[0068] It is understandable that the present embodiment also includes a linear motor 300 as a vibration driving device for driving the touch panel 200 to vibrate. When the additional mass 400 and the elastic connector are used as the frequency extension device, the linear motor 300 can be installed in a variety of ways:

[0069] like Figure 2 As shown, in one embodiment of the present application, the touch panel with broadband vibration function includes a base 100, a touch panel 200 and a frequency extension device, the touch panel 200 is installed on the base 100 through a first elastic connector 510, the frequency extension device is an additional mass 400 and a second elastic connector 520, wherein the additional mass 400 is connected to the touch panel 200 through the second elastic connector 520, and the linear motor 300 is installed on the additional mass 400, and is connected to the touch panel 200 through the additional mass 400.

[0070] exist Figure 2 In the structure shown, the vibration of the linear motor 300 is first transmitted to the additional mass 400, and the additional mass 400 vibrates and transmits the vibration to the touch panel 200 through the second elastic connector 520. Due to the connection through the second elastic connector 520, the vibration frequency of the touch panel 200 and the additional mass 400 affect each other, thereby widening the vibration frequency of the touch panel 200.

[0071] like Figure 3 As shown, in an optional embodiment of the present application, the touch panel with broadband vibration function includes a base 100, a touch panel 200 and a frequency extension device, the touch panel 200 is installed on the base 100 through a first elastic connector 510, the frequency extension device is an additional mass 400 and a second elastic connector 520, wherein the additional mass 400 is connected to the touch panel 200 through the second elastic connector 520, and the linear motor 300 is installed on the touch panel 200.

[0072] exist Figure 3In the structure shown, the linear motor 300 only serves as a driving device for driving the touch panel 200 to vibrate. After driving the touch panel 200 to vibrate, the touch panel 200 drives the additional mass 400 to vibrate through the second elastic connecting member 520, and the vibration of the additional mass 400 is then transmitted to the touch panel 200 through the second elastic connecting member 520. In this case, the vibration of the additional mass 400 affects the vibration of the touch panel 200, thereby changing the vibration frequency of the touch panel 200.

[0073] In the present application, the touch panel 200 is connected to the base 100 via the elastic connector, which may be directly connected via the elastic connector, or indirectly connected via other devices elastically connected to the base 100.

[0074] Reference Figure 4 , 5 As shown, in an optional embodiment of the present application, the additional mass 400 is connected to the base 100 via a first elastic connector 510, and the touch panel 200 is connected to the additional mass 400 via a second elastic connector 520, that is, the touch panel 200 is indirectly elastically connected to the base 100 via the first elastic connector 510, the additional mass 400 and the second elastic connector 520.

[0075] like Figure 4 As shown, in an optional embodiment of the present application, the linear motor 300 is installed on the additional mass 400. During the vibration feedback process, the linear motor 300 first drives the additional mass 400 to vibrate, and the additional mass 400 drives the touch panel 200 to vibrate together. Since the touch panel 200 is connected to the additional mass 400 through the second elastic connecting member 520, the vibration of the additional mass 400 is not synchronized with the vibration of the touch panel 200. The mutual influence between the two causes the vibration frequency of the touch panel 200 to be not completely the same as the vibration frequency of the linear motor 300, thereby realizing the adjustment of the vibration frequency of the touch panel 200.

[0076] In this embodiment, the linear motor 300 is installed on the lower surface of the additional mass 400 . The additional mass 400 is a planar structure and is arranged parallel to the touch surface of the touch panel 200 .

[0077] It is understood that in the above embodiment, the linear motor 300 can be Figure 4 As shown, it is mounted on the additional mass 400, or it can be mounted as shown. Figure 5As shown, the touch panel 200 is installed on the touch panel 200. Under this structure, the touch panel with broadband vibration function includes a base 100, a touch panel 200, an additional mass 400 and a linear motor 300. The additional mass 400 is connected to the base 100 through a first elastic connector 510, the touch panel 200 is connected to the additional mass 400 through a second elastic connector 520, and the linear motor 300 is installed on the lower surface of the touch panel 200.

[0078] When the linear motor 300 is Figure 5 When installed on the touch panel 200 as shown, during the vibration feedback process, the linear motor 300 first drives the touch panel 200 to vibrate, and the touch panel 200 transmits the vibration to the additional mass 400 through the second elastic connector 520. The additional mass 400 is connected to the base 100 through the first elastic connector 510 and can vibrate relative to the base 100. The vibration frequency of the additional mass 400 is different from that of the touch panel 200 due to the inertia and the elastic connector, thereby affecting the vibration frequency of the touch panel 200, thereby achieving the adjustment of the vibration frequency of the touch panel 200.

[0079] In the case of an additional mass 400 connected to the touch panel 200 through an elastic connector, the structure in which the linear motor 300 is installed in the touch panel can also adopt an elastic connector, so that the additional mass 400, the linear motor 300, and the elastic connector are respectively installed in the touch panel as a component of a frequency extension device, bringing more vibration degrees of freedom to the entire system, thereby adjusting the vibration frequency range of the vibration system over a larger range. The properties of the elastic connector and the size of the additional mass can be designed by establishing the corresponding multi-degree-of-freedom vibration system dynamics differential equation. No further details will be given here.

[0080] Specifically, Figure 6As shown, in another optional embodiment of the present application, the touch panel with broadband vibration function includes a base 100 and a touch panel 200, wherein the touch panel 200 is connected to the base 100 via a first elastic connector 510, and an additional mass 400 is connected to the lower surface of the touch panel 200 via a second elastic connector 520, and a linear motor 300 is provided on the additional mass 400 for driving the touch panel 200 to vibrate to achieve touch feedback. In this solution, the linear motor 300 is further installed on the additional mass 400 via a third elastic connector 530, and the linear motor 300 is connected to the additional mass 400 via a second elastic connector 520. In the process of driving the touch panel 200 to vibrate and realize vibration feedback, the linear motor 300 vibrates first, and then drives the additional mass 400 to vibrate through the third elastic connector 530. The additional mass 400 then drives the touch panel 200 to vibrate through the second elastic connector 520. Since the vibration transmission between the second elastic connector 520 and the third elastic connector 530 is non-rigidly connected, it is equivalent to adding two degrees of freedom of vibration. The vibration of the linear motor 300, the vibration of the additional mass 400 and the vibration of the touch panel 200 affect each other, thereby achieving the purpose of adjusting the vibration frequency of the touch panel 200.

[0081] Optionally, when an additional mass 400 and an elastic connector are used as a frequency extension device, the linear motor 300 can not only be connected to the additional mass 400 through the elastic connector, but can also be connected to the touch panel 200, and the connection method between the linear motor 300 and the touch panel 200 can be that the linear motor 300 is connected to the touch panel 200 through an elastic connector, or the linear motor 300 is directly connected to the touch panel 200.

[0082] Specifically, refer to Figure 7 As shown, the touch panel with broadband vibration function described in this embodiment includes a base 100 and a touch panel 200. The base 100 and the touch panel 200 are connected via a first elastic connector 510. An additional mass 400 is installed below the touch panel 200 via a second elastic connector 520. A linear motor 300 is installed on the lower surface of the touch panel 200 via a third elastic connector 530.

[0083] In this embodiment, the additional mass 400 and the linear motor 300 are respectively connected to the touch panel 200 through elastic connectors. The additional mass 400 and the linear motor 300 both play the role of frequency extension devices by cooperating with the elastic connectors. In the process of realizing vibration feedback, the linear motor 300 first transmits its vibration to the touch panel 200 through the third elastic connector 530. Since the linear motor 300 and the touch panel 200 can move relative to each other, the vibrations of the two are not synchronized and affect each other, so that the vibration frequency range of the touch panel 200 is widened; at the same time, the touch panel The vibration of the touch panel 200 is transmitted to the additional mass 400 through the second elastic connecting member 520. The additional mass 400 and the touch panel 200 can also move relatively to each other. The vibration of the additional mass 400 in turn affects the touch panel 200. The vibrations of the two are also asynchronous and affect each other, so that the vibration frequency range of the touch panel 200 is further widened by the additional mass 400. In this solution, two frequency extension devices that can provide vibrations of different frequencies are added to the touch panel 200. The effects of the two frequency extension devices affect each other, providing a wider vibration frequency for the touch panel 200.

[0084] Reference Figure 8 As shown, it provides another structure of a touch panel with a broadband vibration function, which is similar to the above Figure 4 The difference of the solution shown is that the linear motor 300 is mounted on the additional mass 400 via a third elastic connection 530. Figure 4 On the basis of the solution, a vibration degree of freedom is added to the touch panel 200 again, so that the touch panel 200 can have a wider vibration frequency.

[0085] Reference Fig. 9 As shown, it provides another structure of a touch panel with a broadband vibration function, which is similar to the above Figure 5 The difference of the solution shown is that the linear motor 300 is mounted on the touch panel 200 via the third elastic connector 530. Figure 5 On the basis of the solution, a vibration degree of freedom is added to the touch panel 200 again, so that the touch panel 200 can have a wider vibration frequency.

[0086] It should be pointed out that, in the above embodiments, there is no specific restriction on the number of linear motors 300. In the present application, the number of linear motors 300 can be one, two or more. When the number of linear motors 300 is one, it can be arranged on the touch panel 200 or on the additional mass 400 as described in the above embodiments. When there are two or more linear motors 300, all of the linear motors 300 are installed on the touch panel 200, or, all of the linear motors 300 are installed on the additional mass 400, or, the linear motors 300 are installed on the touch panel 200 and the additional mass 400, respectively.

[0087] When multiple linear motors 300 are provided, the installation method of each linear motor 300 can be selected separately. For example, one or more linear motors 300 can be installed through elastic connectors, or all linear motors 300 can be directly installed at corresponding positions.

[0088] Preferably, when multiple linear motors 300 are used, the multiple linear motors 300 are arranged in a roughly symmetrical structure, and all the linear motors 300 can be controlled to vibrate synchronously by a controller or several of the linear motors 300 can be selected to vibrate to achieve vibration feedback. Those skilled in the art can make a choice according to actual needs.

[0089] It should be pointed out that the elastic connector can be used to connect the touch panel 200 and the base 100, can be used to connect the linear motor 300 and the touch panel 200, can be used to connect the additional mass 400 and the touch panel 200, and can also be used to connect the linear motor 300 and the additional mass 400. In the above embodiment, the elastic connector is divided into a first elastic connector 510, a second elastic connector 520 and a third elastic connector 530 for the convenience of description and distinction. They are all elastic connectors, and their specific structures and materials may be the same or different. The elastic connector may be a spring, a spring or an elastic column, and the elastic connector is made of foam, silicone rubber, metal material, ASB plastic or PC plastic.

[0090] As an optional implementation mode of the present application, in some embodiments, the elastic connector is connected to the touch panel, the base, the linear motor and the additional mass by bonding, but the bonding method is not a limitation of the present application. In other embodiments, welding, hot melt connection and other methods can also be used for connection. The specific connection method can be reasonably selected according to the actual connection material, the size of the components, etc.

[0091] It is understandable that the present application does not limit the number of elastic connectors connecting the touch panel 200 and the base 100, connecting the touch panel 200 and the additional mass 400, connecting the touch panel 200 and the linear motor 300, connecting the linear motor 300 and the additional mass 400, and connecting the additional mass 400 and the base 100. Those skilled in the art may make reasonable choices according to the specific elastic connector structure, materials and actual installation needs during the specific setting process.

[0092] It should be noted that the frequency extension device described in the present application is not limited to being connected to the touch panel 200 by an elastic connector to achieve vibration relative to the touch panel 200. In other embodiments, the frequency extension device can also be installed on the touch panel 200 by a movable connection component that defines a relative movable space.

[0093] Specifically, in an optional embodiment of the present application, refer to Fig.10 , 11 As shown, the touch panel with broadband vibration function includes a base 100, a touch panel 200 and a frequency extension device, wherein the frequency extension device is a linear motor 300 and a movable connection component, the touch panel 200 is connected to the base 100 via a first elastic connection member 510, so that the touch panel 200 can move relative to the base 100, the linear motor 300 and the touch panel 200 are relatively movably connected via a movable connection component, and the movable connection component includes a limiting groove 620 and a limiting boss 610, and the limiting groove 620 and the limiting boss 610 are clearance-matched so that the limiting boss 610 can move in the limiting groove 620.

[0094] In this embodiment, the limiting groove 620 is set on the lower surface of the touch panel 200, one end of the limiting boss 610 is connected to the linear motor 300, and the other end extends to the inside of the limiting groove 620 and is restricted in the limiting groove 620 and cannot escape. The clearance between the limiting boss 610 and the limiting groove 620 allows the limiting boss 610 to drive the linear motor 300 to move relative to the limiting groove 620, thereby allowing the linear motor 300 to vibrate relative to the touch panel 200. During the vibration of the linear motor 300, the limiting boss 610 slides in the limiting groove 620, so that a new vibration degree of freedom is generated between the linear motor 300 and the touch panel 200. The linear motor 300 transmits the new relative vibration to the touch panel 200 to affect the vibration frequency of the touch panel 200, thereby adjusting the vibration frequency of the touch panel 200.

[0095] Optionally, in an optional embodiment of the present application, refer to Fig.12 , 13As shown, in another optional embodiment of the present application, the touch panel with broadband vibration function includes a base 100, a touch panel 200, an additional mass 400 and a linear motor 300 as a vibration source, the touch panel 200 is connected to the base 100 via a first elastic connector 510, the additional mass 400 is relatively movably connected to the touch panel 200 via a movable connection component to form a frequency extension device, and the linear motor 300 is mounted on the additional mass 400.

[0096] In this embodiment, the limiting groove 620 is set on the lower surface of the touch panel 200, one end of the limiting boss 610 is connected to the additional mass 400, and the other end extends to the inside of the limiting groove 620 and is restricted in the limiting groove 620 and cannot escape. The clearance between the limiting boss 610 and the limiting groove 620 is matched, so that the limiting boss 610 can drive the additional mass 400 to move relative to the limiting groove 620, so that the additional mass 400 can vibrate relative to the touch panel 200, and when performing vibration feedback During the process, the linear motor 300 vibrates first and transmits the vibration to the additional mass 400. The additional mass 400 transmits the vibration to the touch panel 200 through the movable connection component. During this process, the limiting boss 610 slides in the limiting groove 620, so that a new vibration degree of freedom is generated between the additional mass 400 and the touch panel 200. The additional mass 400 transmits the new relative vibration to the touch panel 200 to change the vibration frequency of the touch panel 200, thereby adjusting the vibration frequency of the touch panel 200.

[0097] In order to avoid collision noise caused by relative movement between the limiting boss 610 and the limiting groove 620, and to avoid damage to the structure, in a further preferred scheme of the present application, a buffer pad can be provided on the outer surface of the limiting boss 610 and / or the inner surface of the limiting groove. When the limiting groove 620 and the limiting boss 610 vibrate relative to each other and collide, they first contact with the buffer pad to absorb the vibration, thereby avoiding noise and damage.

[0098] Optional, see Figure 14-17 As shown, in this solution, the touch panel 200 can also be installed on the base 100 through a movable connection component that defines a relatively movable space, thereby achieving a relatively movable connection between the touch panel 200 and the base 100.

[0099] In the present application, the linear motor 300 is preferably configured such that its vibration direction is parallel to the touch surface direction of the touch panel 200 , or its vibration direction is perpendicular to the touch surface direction of the touch panel 200 .

[0100] It is understandable that the vibration direction of the linear motor 300 is not a limitation to the technical solution of the present application. Under the inventive concept of the present application, those skilled in the art can make a reasonable selection according to actual product needs.

[0101] At the same time, the present application provides a touch device, including a display screen and a touch panel, wherein the touch panel is the touch panel with a broadband vibration function as described above.

[0102] The touch device described in this solution can be a laptop or tablet computer, a large educational tablet or a commercial tablet, etc. The touch panel can be a button, a switch or other input / output member operably connected to the housing of the touch device.

[0103] The display screen can provide output for the touch device, and can be a liquid crystal display screen, a plasma screen, and the like.

[0104] In some embodiments, the display screen can be used as both an input and output device. For example, the display screen can include a capacitive input sensor so that a user can provide input signals to a touch-sensitive device via his or her finger.

[0105] The touchpad can be used as an input device as well as a feedback device. In one embodiment, the touchpad allows a user to provide input signals to the touch-controlled device. For example, the touch-controlled device can change the volume, return to the home screen (for example and not limitation). In addition, the touchpad can be almost any size, shape, and can be located in any area of ​​the touch-controlled device. The touchpad can be positioned on the back or side of the display screen.

[0106] In one example, a touch pad can be positioned on the front bottom surface of the display device. The touch pad is configured so that it can be touched, pressed, or otherwise felt by a user.

[0107] At the same time, refer to Fig.19 As shown, the present application provides a vehicle-mounted central control display device, including a touch panel with a wide-band vibration function as described above. By setting the above touch panel on the vehicle-mounted central control display device, the driver can judge the operation status through touch feedback during driving without shifting his sight to the vehicle-mounted central control display device, thereby avoiding dangerous driving and obtaining a more realistic touch feedback experience. Moreover, the vibration frequency of the touch panel can be widened on the basis of the vibration frequency formed by the original power source, thereby achieving vibration feedback in a wider frequency range, so that the vibration feedback vibration frequency range can effectively cover the frequency range of tactile perception, achieve wide-band vibration, and obtain an ideal waveform, so as to achieve a realistic physical mechanical button simulated vibration feedback effect.

[0108] At the same time, refer to Fig. 20As shown, in another embodiment of the present application, a conference tablet is provided, including the touch pad with broadband vibration function as described above. By setting the touch pad with broadband vibration function, the operator can feel a more realistic touch feedback experience during the operation of the conference tablet.

[0109] Meanwhile, another embodiment of the present application also provides an electronic device, including the touch panel with broadband vibration function as described above. Installing the touch panel with broadband vibration function on the electronic device can enable the electronic device to provide the operator with a better touch interaction experience.

[0110] In the description of this article, it should be understood that the terms "upper", "lower", "left", "right", etc., and other directions or positional relationships are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of this application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0111] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0112] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0113] The technical principles of the present application are described above in conjunction with specific embodiments. These descriptions are only for explaining the principles of the present application and cannot be interpreted as limiting the scope of protection of the present application in any way. Based on the explanations herein, those skilled in the art can think of other specific implementation methods of the present application without creative work, and these methods will fall within the scope of protection of the present application.

Claims

1. A touch panel with broadband vibration function, It is characterized in that The invention comprises a base (100) and a touch panel (200), wherein the touch panel (200) is connected to the base (100) and can move relative to the base (100), and the touch panel (200) is connected to a frequency extension device, and the frequency extension device is configured such that when the touch panel (200) is vibrated by a driving force, the frequency extension device can vibrate relative to the touch panel (200) and transmit the vibration to the touch panel (200) to affect the vibration frequency of the touch panel (200).

2. The touch panel with broadband vibration function according to claim 1, It is characterized in that The frequency extension device is elastically connected to the touch panel (200).

3. The touch panel with broadband vibration function according to claim 2, It is characterized in that The frequency extension device comprises a linear motor (300) and an elastic connecting member, and the linear motor (300) is elastically connected to the touch panel (200) via the elastic connecting member.

4. The touch panel with broadband vibration function according to claim 2, It is characterized in that The frequency extension device comprises an additional mass (400), a linear motor (300) and an elastic connecting member, and the additional mass (400) is elastically connected to the touch panel (200) via the elastic connecting member.

5. The touch panel with broadband vibration function according to claim 4, It is characterized in that The linear motor (300) is mounted on the additional mass (400) and is connected to the touch panel (200) via the additional mass (400).

6. The touch panel with broadband vibration function according to claim 5, It is characterized in that The linear motor (300) is connected to the additional mass (400) via an elastic connection member.

7. The touch panel with broadband vibration function according to claim 4, It is characterized in that The linear motor (300) is connected to the touch panel (200) via an elastic connecting member, or the linear motor (300) is directly connected to the touch panel (200).

8. The touch panel with broadband vibration function according to claim 1, It is characterized in that The touch panel (200) is elastically connected to the base (100) via an elastic connecting member.

9. The touch panel with broadband vibration function according to claim 4, It is characterized in that The additional mass (400) is connected to the base (100) via an elastic connecting member, and the touch panel (200) is connected to the additional mass (400) via an elastic connecting member.

10. The touch panel with broadband vibration function according to claim 9, It is characterized in that The linear motor (300) is installed on the touch panel (200), or the linear motor (300) is installed on the additional mass (400).

11. The touch panel with broadband vibration function according to claim 10, It is characterized in that When the linear motor (300) is installed on the touch panel (200), the linear motor (300) is connected to the touch panel (200) via an elastic connecting member; when the linear motor (300) is installed on the additional mass (400), the linear motor (300) is connected to the additional mass (400) via an elastic connecting member.

12. The touch panel with broadband vibration function according to claim 4, It is characterized in that There are two or more linear motors (300), and all of the linear motors (300) are mounted on the touch panel (200), or all of the linear motors (300) are mounted on the additional mass (400), or the linear motors (300) are respectively mounted on the touch panel (200) and the additional mass (400).

13. The touch panel with broadband vibration function according to any one of claims 2 to 11, It is characterized in that The elastic connecting member is a spring, a spring or an elastic column.

14. The touch panel with broadband vibration function according to claim 13, It is characterized in that The elastic connecting piece is made of foam, silicone rubber, metal material, ASB plastic or PC plastic.

15. The touch panel with broadband vibration function according to claim 2, It is characterized in that The frequency extension device comprises a movable connection component defining a relatively movable space, and the frequency extension device is mounted on the touch panel (200) via the movable connection component.

16. The touch panel with broadband vibration function according to claim 2, It is characterized in that The touch panel (200) is mounted on the base (100) via a movable connection component defining a relatively movable space.

17. The touch panel with broadband vibration function according to claim 2, It is characterized in that The frequency extension device comprises an additional mass (400) and a movable connection component defining a relatively movable space, and the additional mass (400) is respectively connected to the base (100) or the touch panel (200) through the movable connection component.

18. The touch panel with broadband vibration function according to any one of claims 15 to 17, It is characterized in that The movable connection component comprises a limiting groove (620) and a limiting boss (610), and the limiting groove (620) and the limiting boss (610) are clearance-matched so that the limiting boss (610) can move in the limiting groove (620).

19. The touch panel with broadband vibration function according to claim 18, It is characterized in that A buffer is provided on the inner wall of the limiting groove (620).

20. The touch panel with broadband vibration function according to claim 3 or 4, It is characterized in that The linear motor (300) is configured such that its vibration direction is parallel to the touch surface direction of the touch panel (200), or its vibration direction is perpendicular to the touch surface direction of the touch panel (200).

21. A touch device, It is characterized in that It comprises a display screen and a touch panel, wherein the touch panel is a touch panel with a broadband vibration function as claimed in any one of claims 1 to 20.

22. A vehicle-mounted central control display device, in, Includes the touch control device as claimed in claim 21.

23. A conference tablet, in, Includes the touch control device as claimed in claim 21.

24. An electronic device, in, Includes the touch control device as claimed in claim 21.

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