An ultrasonic tactile feedback module

Abstract

The present invention discloses an ultrasonic tactile feedback module, which includes a flexible circuit board, piezoelectric ceramic sheets, a substrate body, and a glass panel; a plurality of piezoelectric ceramic sheets are fixed between the flexible circuit board and the substrate body; the substrate body is fixed on the glass panel, and the substrate body includes a substrate bonding surface, substrate arms, and a substrate fulcrum surface; the substrate fulcrum surface is fixed on the glass panel; when the plurality of piezoelectric ceramic sheets are energized and vibrate, the substrate body converges the small vibrations of the piezoelectric ceramic sheets into a large vibration of the substrate bonding surface through the substrate bonding surface, and the large vibration of the substrate bonding surface is transmitted to the substrate fulcrum surface through the substrate arms, and the large vibration of the substrate fulcrum surface acts on the glass panel. The present invention amplifies the vibration force of the piezoelectric ceramic sheets acting on the glass panel through the substrate body connecting the piezoelectric ceramic sheets and the glass panel, increases the sense of shock acting on the glass panel, so as to improve the accuracy of tactile feedback when the screen is relatively thick.

Description

Technical Field

[0001] The present invention belongs to the technical field of touch screens, and particularly relates to an ultrasonic tactile feedback module. Background Art

[0002] The most commonly used display screen panel is touch screen technology. Touch screen technology has penetrated into all fields of modern society. The popularization of touch screen technology is not only convenient to use, but also gives people an aesthetic enjoyment visually. When people use it, they often need the touch screen to vibrate after being touched by a finger to feedback to people. Ordinary tactile feedback uses a relatively single low-frequency piezoelectric sheet, and the vibration feeling is limited, and it cannot be used in the field where the touch screen is very thick, especially in the application of tactile feedback on automotive instrument panels; for the same principle, the vibration of a single piezoelectric ceramic sheet has limitations. When the thickness of the touch screen is greater than 2 mm, the energy of a single piezoelectric ceramic sheet is not enough to cause the touch screen to deform and generate vibration; therefore, in the case where the touch screen is very thick, how to increase the vibration feeling of the touch screen is a technical problem that needs to be solved urgently. Summary of the Invention

[0003] Object of the Invention: The object of the present invention is to provide an ultrasonic tactile feedback module in view of the deficiencies of the prior art.

[0004] The technical solution for realizing the present invention is as follows:

[0005] The ultrasonic tactile feedback module of the present invention includes a flexible circuit board, piezoelectric ceramic sheets, a substrate body, and a glass panel; a plurality of the piezoelectric ceramic sheets are fixed between the flexible circuit board and the substrate body; the substrate body is fixed on the glass panel, and the substrate body includes a substrate bonding surface, substrate arms, and a substrate fulcrum surface; a plurality of piezoelectric ceramic sheets are bonded on the substrate bonding surface; the substrate arms connect the substrate bonding surface and the substrate fulcrum surface; the substrate fulcrum surface is fixed on the glass panel; when a plurality of the piezoelectric ceramic sheets are energized and vibrate, they jointly drive the substrate bonding surface to vibrate synchronously. The substrate body converges the small vibrations of the piezoelectric ceramic sheets into a large vibration of the substrate bonding surface through the substrate bonding surface. The large vibration of the substrate bonding surface is transmitted to the substrate fulcrum surface through the substrate arms, and the large vibration of the substrate fulcrum surface acts on the glass panel to increase the vibration feeling acting on the glass panel.

[0006] The preferred technical solution of the present invention is that the substrate body includes a substrate bonding surface arranged parallel to the piezoelectric ceramic sheets, and a substrate arm with a U-shaped cross section is vertically fixed on the substrate bonding surface. One free end cross arm of the substrate arm is vertically fixed on the substrate bonding surface, and the other free end cross arm of the substrate arm is the substrate fulcrum surface, and the substrate fulcrum surface is fixed on the glass panel. The vertical arm of the substrate arm is perpendicular to the glass panel, and the vertical arm of the substrate arm intersects the substrate fulcrum surface at a fixed point;

[0007] When the piezoelectric ceramic pieces on the substrate bonding surface vibrate together to drive the substrate bonding surface to vibrate greatly, the large vibration of the substrate bonding surface drives the vertical arms on the substrate arm to swing greatly with the fixed point as the fulcrum. Through the large swing of the substrate arm, the fixed point fixing surface of the substrate fulcrum surface is driven to vibrate greatly, increasing the vibration sensation acting on the glass panel, thereby driving the glass panel to vibrate.

[0008] Preferably, UV glue is applied on the substrate body, and multiple piezoelectric ceramic pieces are bonded to the substrate body through the UV glue. The UV glue fixes the piezoelectric ceramic pieces more firmly on the substrate body and can prevent the piezoelectric ceramic pieces from being displaced.

[0009] Preferably, a conductive cloth is laid on the substrate body bonded with piezoelectric ceramic pieces, and the flexible circuit board is bonded to the piezoelectric ceramic pieces through the conductive cloth. Through the design of the conductive cloth, the circuit between the flexible circuit board and the piezoelectric ceramic pieces is conducted.

[0010] Preferably, the thickness of the glass panel is not less than 1 mm; the tactile feedback module in the present invention can be used in the tactile feedback field where the thickness of the glass panel is above 1 mm and the glass panel is very large.

[0011] Adopting the above technical solution, the present invention has the following beneficial effects:

[0012] (1) In the present invention, when multiple piezoelectric ceramic pieces are energized and vibrate, the multiple small vibrations of the piezoelectric ceramic pieces act together on the substrate bonding surface of the substrate body. The substrate bonding surface makes a bending vibration, and the multiple small vibrations of the piezoelectric ceramic pieces converge into a large vibration of the substrate bonding surface. The large vibration of the substrate bonding surface is transmitted to the substrate fulcrum surface through the substrate arm. The large vibration of the substrate bonding surface drives the vertical arms on the substrate arm to swing greatly with the fixed point as the fulcrum. The large swing of the substrate arm with the fixed point as the fulcrum will cause the substrate fulcrum surface to make a large up-and-down vibration through the action of force. The up-and-down large vibration of the substrate fulcrum surface acts on the glass panel, increasing the vibration sensation acting on the glass panel, thereby driving the glass panel to vibrate, and further improving the accuracy of tactile feedback.

[0013] (2) The tactile feedback module of the present invention has a simple structure, is easy to manufacture, and has good tactile feedback accuracy; the present invention is applicable to the tactile feedback field where the thickness of the glass panel is above 1 mm and the glass panel is very large; especially for the application of large glass panels at the present stage, it has a broad application prospect and high market promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to make the content of the present invention be more clearly understood, the following further describes the present invention in detail according to specific embodiments in conjunction with the drawings, wherein:

[0015] Figure 1 Schematic structural diagram of the ultrasonic tactile feedback module of the present invention;

[0016] Figure 2 Cross-sectional schematic diagram of the piezoelectric ceramic sheet, substrate body and glass panel of the present invention;

[0017] Figure 3 Schematic diagram of the vibration trajectory of the piezoelectric ceramic sheet, substrate body and glass panel of the present invention.

[0018] In the figure, 1 - flexible circuit board, 2 - conductive cloth, 3 - piezoelectric ceramic sheet, 4 - UV glue, 5 - substrate body, 51 - substrate bonding surface, 52 - substrate arm, 53 - substrate fulcrum surface, 6 - glass panel. Specific embodiments

[0019] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the described embodiments.

[0020] Embodiment: An ultrasonic tactile feedback module, as shown in the attached Figure 1 figure. The ultrasonic tactile feedback module includes a flexible circuit board 1, a piezoelectric ceramic sheet 3, a substrate body 5 and a glass panel 6; UV glue 4 is applied on the substrate body 5, and the UV glue 4 is applied on the substrate body 5 by means of machine gluing. A plurality of piezoelectric ceramic sheets 3 are bonded to the substrate body 5 through the action of UV glue 4 and a certain pressure. The piezoelectric ceramic sheets 3 are firmly adhered to the substrate body 5 through the UV glue to prevent the piezoelectric ceramic sheets 3 from being displaced and affecting their normal operation; a conductive cloth 2 is laid on the substrate body 5 bonded with the piezoelectric ceramic sheets 3, and the flexible circuit board 1 is bonded to the piezoelectric ceramic sheets 3 through the conductive cloth 2 and a certain pressure. The flexible circuit board and the piezoelectric ceramic sheet are electrically connected through the conductive cloth; as shown in the attached Figure 1 figure, each piezoelectric ceramic sheet 3 is respectively provided with UV glue and conductive cloth, so that the piezoelectric ceramic sheets are independently installed; a plurality of piezoelectric ceramic sheets 3 are fixed between the flexible circuit board 1 and the substrate body 5. The substrate body 5 is fixed on the glass panel 6, and the thickness of the glass panel in this embodiment is not less than 1 mm; as shown in the attached Figure 2As shown, the substrate body 5 includes a substrate bonding surface 51, a substrate arm 52, and a substrate fulcrum surface 53; a plurality of piezoelectric ceramic sheets 3 are bonded on the substrate bonding surface 51; the substrate arm 52 connects the substrate bonding surface 51 and the substrate fulcrum surface 53; the substrate fulcrum surface 53 is fixed on the glass panel 6; in this embodiment, the substrate bonding surface 51 is arranged parallel to the piezoelectric ceramic sheet 3; a substrate arm 52 with a U-shaped cross-section is vertically fixed on the substrate bonding surface 51, a transverse arm at one free end of the substrate arm 52 is vertically fixed on the substrate bonding surface 51, the transverse arm at the other free end of the substrate arm 52 is the substrate fulcrum surface 53, the substrate fulcrum surface 53 is fixed on the glass panel 6, the vertical arm of the substrate arm 52 is perpendicular to the glass panel 6, and the vertical arm of the substrate arm 52 intersects the substrate fulcrum surface at a fixed point; as shown in the appendix Figure 3 As shown, when a plurality of piezoelectric ceramic sheets 3 are energized and vibrate, the multiple small vibrations of the piezoelectric ceramic sheets 3 act together on the substrate bonding surface 51 of the substrate body 5, and the substrate bonding surface 51 undergoes bending vibration. The multiple small vibrations of the piezoelectric ceramic sheets 3 converge into a large vibration of the substrate bonding surface 51. The large vibration of the substrate bonding surface 51 is transmitted to the substrate fulcrum surface 53 through the substrate arm 52. The large vibration of the substrate bonding surface 51 drives the vertical arm on the substrate arm 52 to perform a large swing with the fixed point A as the base point. Through the vibration trajectory in the appendix Figure 3 it can be seen that the large swing of the substrate arm 52 with the fixed point A as the base point will cause the substrate fulcrum surface 53 to perform large up-and-down vibrations through the action of force. The large up-and-down vibrations of the substrate fulcrum surface 53 act on the glass panel 6, increasing the vibration sensation acting on the glass panel, thereby driving the glass panel 6 to vibrate and improving the accuracy of tactile feedback.

[0021] The ordinary piezoelectric sheet tactile feedback method is different from the tactile feedback module in this embodiment. The ordinary tactile feedback directly uses the direct up-and-down vibration of the ceramic sheet for feedback, and the direct amplitude of the ceramic sheet determines the accuracy of tactile feedback. However, the tactile feedback module in this embodiment uses a swing arm principle of the substrate body 5 to achieve an amplified vibration mode; the ordinary piezoelectric sheet tactile feedback is difficult to achieve a large displacement for a glass panel with a thickness of more than 2 mm, while the tactile feedback module in this embodiment can achieve a vibration displacement of a glass panel with a thickness of more than 2 mm, and is particularly suitable for the touch feedback field where the glass panel is more than 1 mm thick and the glass panel is very large. The tactile feedback module in this embodiment drives the substrate body 5 to perform large-displacement vibration by simultaneously performing small-displacement vibrations of a plurality of piezoelectric ceramic sheets 3. In the case where the glass panel is large and thick, when a person's finger touches the glass panel, it can better feedback signals and improve the accuracy of tactile feedback.

[0022] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as a limitation on the present invention itself. Various changes may be made in form and detail thereof without departing from the spirit and scope of the present invention as defined by the appended claims.

Claims

1. An ultrasonic tactile feedback module, characterized in that, It includes a flexible circuit board, piezoelectric ceramic sheets, a substrate body, and a glass panel; a plurality of the piezoelectric ceramic sheets are fixed between the flexible circuit board and the substrate body; the substrate body is fixed on the glass panel, and the substrate body includes a substrate bonding surface, substrate arms, and a substrate fulcrum surface; A plurality of piezoelectric ceramic sheets are bonded on the substrate bonding surface; the substrate arms connect the substrate bonding surface and the substrate fulcrum surface; the substrate fulcrum surface is fixed on the glass panel; when a plurality of the piezoelectric ceramic sheets vibrate when electrified, they jointly drive the substrate bonding surface to vibrate synchronously, and the substrate body converges the small vibrations of the piezoelectric ceramic sheets into a large vibration of the substrate bonding surface through the substrate bonding surface, and the large vibration of the substrate bonding surface is transmitted to the substrate fulcrum surface through the substrate arms, and the large vibration of the substrate fulcrum surface acts on the glass panel, increasing the sense of vibration acting on the glass panel; The substrate body includes a substrate bonding surface arranged parallel to the piezoelectric ceramic sheets, and a substrate arm with a U-shaped cross section is vertically fixed on the substrate bonding surface. A transverse arm at one free end of the substrate arm is vertically fixed on the substrate bonding surface, and a transverse arm at the other free end of the substrate arm is the substrate fulcrum surface, and the substrate fulcrum surface is fixed on the glass panel. The vertical arm of the substrate arm is perpendicular to the glass panel, and the vertical arm of the substrate arm intersects the substrate fulcrum surface at a fixed point; When the piezoelectric ceramic sheets located on the substrate bonding surface vibrate together to drive the substrate bonding surface to perform a large vibration, the large vibration of the substrate bonding surface drives the vertical arm on the substrate arm to perform a large swing with the fixed point as the base point, and the large swing of the substrate arm drives the substrate fulcrum surface to perform a large vibration, increasing the sense of vibration acting on the glass panel, thereby driving the glass panel to vibrate.

2. The ultrasonic tactile feedback module according to claim 1, wherein, UV glue is applied on the substrate body, and a plurality of the piezoelectric ceramic sheets are bonded to the substrate body through the UV glue.

3. The ultrasonic tactile feedback module according to claim 2, wherein, A conductive cloth is laid on the substrate body bonded with the piezoelectric ceramic sheets, and the flexible circuit board is bonded to the piezoelectric ceramic sheets through the conductive cloth.

4. The ultrasonic tactile feedback module according to claim 1, wherein The thickness of the glass panel is not less than 1 mm.

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