CN116185228A - Haptic feedback panel and haptic feedback device - Google Patents

Haptic feedback panel and haptic feedback device Download PDF

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Publication number
CN116185228A
CN116185228A CN202310184223.7A CN202310184223A CN116185228A CN 116185228 A CN116185228 A CN 116185228A CN 202310184223 A CN202310184223 A CN 202310184223A CN 116185228 A CN116185228 A CN 116185228A
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CN
China
Prior art keywords
substrate
haptic feedback
touch
feedback panel
piezoelectric
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Pending
Application number
CN202310184223.7A
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Chinese (zh)
Inventor
陈右儒
花慧
齐德兴
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BOE Technology Group Co Ltd
Beijing BOE Technology Development Co Ltd
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BOE Technology Group Co Ltd
Beijing BOE Technology Development Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by BOE Technology Group Co Ltd, Beijing BOE Technology Development Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to CN202310184223.7A priority Critical patent/CN116185228A/en
Publication of CN116185228A publication Critical patent/CN116185228A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
    • G06F3/04144—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position using an array of force sensing means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

The invention provides a touch feedback panel and a touch feedback device, wherein the corner positions and the center positions of a substrate are respectively and fixedly connected with a touch substrate through corresponding supporting structures, so that when a piezoelectric element vibrates, the substrate and the touch substrate can be driven to generate uniform resonance, and the problem of insufficient local vibration displacement in the prior art can be completely solved. Therefore, by adopting the haptic feedback panel provided by the invention, a user can feel the same shock sensation when touching any position of the touch substrate, the haptic feedback effect is improved, and the user experience is enhanced.

Description

Haptic feedback panel and haptic feedback device
Technical Field
The invention relates to the technical field of haptic feedback, in particular to a haptic feedback panel and a haptic feedback device.
Background
Haptic feedback (Haptics) is an important point of modern technological development, and in particular, haptic feedback can enable a terminal to interact with a human body through haptic sensation. Haptic feedback can be divided into two categories, one being vibration feedback and one being haptic reproduction technology.
The surface touch reproduction technology can sense the object characteristics through the bare finger touch screen, realizes efficient and natural interaction in the multimedia terminal, has huge research value, and thus, obtains the wide attention of research students at home and abroad. In the physical sense of surface touch, the surface roughness of an object acts on the surface of skin (fingertip), and different friction forces are formed due to different surface structures. Thus, by controlling the surface friction, a simulation of different haptic/tactile sensations can be achieved.
Disclosure of Invention
The embodiment of the invention provides a touch feedback panel and a touch feedback device, which are used for realizing uniform vibration of a touch substrate.
The haptic feedback panel provided by the embodiment of the invention comprises:
a touch substrate;
the substrate base plate is arranged on the non-touch surface of the touch base plate;
the piezoelectric element is arranged on one side of the substrate base plate, which is away from the touch base plate; the piezoelectric element is used for vibrating under the action of an alternating electric field and driving the substrate and the touch substrate to resonate;
the support structure is arranged between the touch substrate and the substrate; and each corner position and the center position of the substrate are fixedly connected with the touch substrate through the corresponding supporting structures.
In a possible implementation manner, in the haptic feedback panel provided by the embodiment of the invention, the support structures located at each corner position are distributed in a central symmetry manner relative to the support structures located at the central position.
In a possible implementation manner, in the haptic feedback panel provided by the embodiment of the invention, the materials of the supporting structures are the same, and the sum of the areas of the supporting structures at the corner positions is equal to the area of the supporting structure at the central position.
In one possible implementation, in the above tactile feedback panel provided by the embodiment of the present invention, the material of the support structure includes foam.
In one possible implementation manner, in the above tactile feedback panel provided by the embodiment of the present invention, the shape of the support structure includes a square shape or a circular shape.
In one possible implementation manner, in the above tactile feedback panel provided by the embodiment of the invention, the piezoelectric element is a PZT piezoelectric thin film structure or a piezoelectric ceramic bulk structure.
In a possible implementation manner, in the above-mentioned haptic feedback panel provided by the embodiment of the present invention, the number of piezoelectric elements is one, and the piezoelectric elements are disposed at a central position or one of corner positions of the substrate.
In a possible implementation manner, in the above tactile feedback panel provided by the embodiment of the invention, the number of the piezoelectric elements is four, and each piezoelectric element is respectively disposed at each corner position of the substrate base plate.
In one possible implementation manner, in the above-mentioned haptic feedback panel provided by the embodiment of the present invention, the number of piezoelectric elements is five, and each piezoelectric element is disposed at a central position and at each corner position of the substrate board.
In a possible implementation manner, in the above tactile feedback panel provided by the embodiment of the present invention, the number of the piezoelectric elements is plural, and the plural piezoelectric elements are arranged in an array on the substrate.
In a possible implementation manner, in the above tactile feedback panel provided by the embodiment of the present invention, the touch substrate is a metal touch pad, or the touch substrate is a display substrate.
Correspondingly, the embodiment of the invention also provides a tactile feedback device which comprises the tactile feedback panel provided by the embodiment of the invention.
The embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides a touch feedback panel and a touch feedback device, wherein the corner positions and the center positions of a substrate are respectively and fixedly connected with a touch substrate through corresponding supporting structures, so that when a piezoelectric element vibrates, the substrate and the touch substrate can be driven to generate uniform resonance, and the problem of insufficient local vibration displacement in the prior art can be completely solved. Therefore, by adopting the haptic feedback panel provided by the embodiment of the invention, a user can feel the same shock sensation when touching any position of the touch substrate, the haptic feedback effect is improved, and the user experience is enhanced.
Drawings
FIG. 1 is a schematic plan view of a haptic feedback panel according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view taken along the direction AA' of FIG. 1;
FIG. 3 is a schematic plan view of yet another haptic feedback panel according to an embodiment of the present invention;
FIG. 4 is a schematic plan view of yet another haptic feedback panel provided by an embodiment of the present invention;
FIG. 5 is a schematic plan view of yet another haptic feedback panel provided by an embodiment of the present invention;
fig. 6 is a schematic plan view of a haptic feedback panel according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. And embodiments of the invention and features of the embodiments may be combined with each other without conflict. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used in this specification, the word "comprising" or "comprises", and the like, means that the element or article preceding the word is meant to encompass the element or article listed thereafter and equivalents thereof without excluding other elements or articles. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "inner", "outer", "upper", "lower", etc. are used merely to denote relative positional relationships, which may also change accordingly when the absolute position of the object to be described changes.
It should be noted that the dimensions and shapes of the figures in the drawings do not reflect true proportions, and are intended to illustrate the present invention only. And the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
At present, the structure for realizing the haptic reproduction technology is mostly that a piezoelectric structure is arranged on a substrate, then the substrate and a touch substrate are attached together, and the substrate is driven to resonate by utilizing the vibration of the piezoelectric structure, so that haptic feedback is realized. In the existing touch reproduction structure, three states exist between a substrate and a touch substrate: (1) The two are in a free state, so that a zero displacement line is arranged in the middle of vibration displacement, and the substrate cannot vibrate locally; (2) The edge areas of the two are fixedly connected by adopting a rigid supporting structure, so that the vibration displacement close to the edge area is almost 0, and the edge vibration sense is weaker; (3) The middle areas of the two are fixedly connected by adopting a rigid supporting structure, so that the vibration displacement near the middle area is almost 0, and the middle shock sensation is weaker. Therefore, the existing haptic reproduction structure cannot achieve uniform vibration at any position of the substrate.
In view of the above, in order to solve the above problems, an embodiment of the present invention provides a haptic feedback panel, as shown in fig. 1 and 2, fig. 1 is a schematic plan view of the haptic feedback panel, and fig. 2 is a schematic sectional view along AA' direction in fig. 1, the haptic feedback panel includes:
a touch substrate 1;
a substrate 2 disposed on the non-touch surface of the touch substrate 1;
a piezoelectric element 3 disposed on a side of the substrate 2 facing away from the touch substrate 1; the piezoelectric element 3 is used for vibrating under the action of an alternating electric field and driving the substrate 2 and the touch substrate 1 to resonate;
a support structure 4 disposed between the touch substrate 1 and the substrate 2; each corner position and the center position of the substrate 2 are fixedly connected with the touch substrate 1 through the corresponding supporting structure 4.
According to the haptic feedback panel provided by the embodiment of the invention, the corner positions and the center positions of the substrate are fixedly connected with the touch substrate through the corresponding supporting structures, so that when the piezoelectric element vibrates, the substrate and the touch substrate can be driven to generate uniform resonance, and the problem of insufficient local vibration displacement in the prior art can be completely solved. Therefore, by adopting the haptic feedback panel provided by the embodiment of the invention, a user can feel the same shock sensation when touching any position of the touch substrate, the haptic feedback effect is improved, and the user experience is enhanced.
In a specific implementation, in the haptic feedback panel provided by the embodiment of the present invention, as shown in fig. 1, the support structures 4 located at the corner positions are distributed in a central symmetry manner with respect to the support structures located at the central positions. Thus, the support structures 4 are uniformly distributed, and vibration displacement of each position of the touch substrate can be further uniform.
In a specific implementation, in the above-mentioned haptic feedback panel provided by the embodiment of the present invention, as shown in fig. 1, the materials of each support structure 4 may be the same, for example, the materials of the support structures 4 include foam, and the sum of the areas of the support structures 4 located at each corner position is equal to the area of the support structure 4 located at the center position. Therefore, when a user touches the edge area and the central area of the touch substrate, the shock sensation of the edge area is the same as that of the central area, and the user experience is improved.
The material of each support structure 4 may also be different in practice, but it is necessary to satisfy: the sum of the area x young's modulus of the support structure at each corner location is equal to the area x young's modulus of the support structure at the center location. Therefore, the vibration displacement of each position of the touch substrate can be uniform.
In specific implementation, the embodiment of the invention can excite the basic vibration mode of the touch substrate through the piezoelectric element, and can achieve uniform vibration by limiting the low-order mode shape and the supporting structure of the touch substrate. For example, the supporting area and the supporting elastic constant of the supporting structure are designed, the vibration frequency corresponding to the low-order mode of the touch substrate is adjusted to fall between 100Hz and 1000Hz, or the area of the piezoelectric element is increased, the arrangement of the piezoelectric element is adjusted, the vibration frequency corresponding to the low-order mode of the touch substrate is adjusted to fall between 100Hz and 1000Hz, and the vibration frequency in the range is generally the vibration frequency required by people. Therefore, the embodiment of the invention can enable the touch substrate to generate low-frequency resonance through resonance, and can enable the touch substrate to vibrate uniformly through the elasticity and the area design of the supporting structure.
In particular embodiments, in the haptic feedback panel provided by embodiments of the present invention, the shape of the support structure may include, but is not limited to, square or circular. Specifically, as shown in fig. 1, the shape of the support structure is square.
In a specific implementation, in the above-mentioned haptic feedback panel provided by the embodiment of the present invention, as shown in fig. 1 and 2, the piezoelectric element 3 may be a PZT piezoelectric thin film structure or a piezoelectric ceramic bulk structure. Thus, the thickness of the piezoelectric circuit/element can be greatly reduced, and the haptic feedback panel is light and thin.
Optionally, taking the piezoelectric element 3 as a PZT piezoelectric film structure as an example, the piezoelectric element 3 may include a first electrode layer, a piezoelectric material layer, and a second electrode layer that are stacked, where the first electrode layer may be grounded, and the second electrode layer may be connected to a driving signal end, and by using an inverse piezoelectric effect, the application of a high-frequency alternating current voltage signal (VAC) to the piezoelectric material layer is achieved by loading the second electrode layer with the high-frequency alternating current voltage signal (VAC), so as to generate high-frequency vibration, and measurement of vibration displacement may be achieved by using laser, so as to ensure the usability of the haptic feedback panel.
In the embodiment, the materials of the first electrode layer and the second electrode layer are transparent conductive materials, for example, indium Tin Oxide (ITO), indium Zinc Oxide (IZO), and the like, and those skilled in the art can set the materials of the first electrode layer and the second electrode layer according to practical application needs, which are not limited herein.
In particular, the piezoelectric material layer is not limited to the above-mentioned lead zirconate titanate (Pb (Zr, ti) O) 3 PZT), aluminum nitride (AlN), znO (zinc oxide), barium titanate (BaTiO) 3 ) Lead titanate (PbTiO) 3 ) Potassium niobate (KNbO) 3 ) Lithium niobate (LiNbO) 3 ) Lithium tantalate (LiTaO) 3 ) Lanthanum gallium silicate (La) 3 Ga 5 SiO 14 ) In this way, the transparency of the haptic feedback panel is ensured, and the vibration characteristic of the haptic feedback panel is ensured, and the material for manufacturing the piezoelectric material layer can be specifically selected according to the actual use needs of those skilled in the art, which is not limited herein. When the PZT is used for manufacturing the piezoelectric material layer, the piezoelectric coefficient of the PZT ensures the piezoelectric property of the corresponding haptic feedback panel, the corresponding haptic feedback panel can be applied to the haptic feedback device, and the PZT has higher light transmittance, so that the display quality of the display device is not affected when the PZT is integrated into the display device.
In a specific implementation, in the above-mentioned haptic feedback panel provided by the embodiment of the present invention, as shown in fig. 1 and 2, the number of piezoelectric elements 3 may be plural, and plural piezoelectric elements 3 are arrayed on the substrate 2. This arrangement of a larger number of piezoelectric elements 3 can make the substrate 2 vibrate more uniformly at each position.
In a specific implementation, in the above-mentioned haptic feedback panel provided by the embodiment of the present invention, as shown in fig. 3 and 4, the number of piezoelectric elements 3 may also be one, and since each corner position and the center position of the substrate 2 are fixedly connected with the touch substrate 1 through the corresponding support structure 4, one piezoelectric element 3 can also make the substrate 2 generate uniform resonance, and the number of piezoelectric elements 3 can be greatly reduced, so that the cost is reduced. Specifically, as shown in fig. 3, the piezoelectric element 3 may be disposed at a central position of the substrate base 2; as shown in fig. 4, the piezoelectric element 3 may also be disposed at any one corner position of the substrate base plate 2, and fig. 4 exemplifies that the piezoelectric element 3 is disposed at a lower right corner position of the substrate base plate 2.
In a specific implementation, in the above-mentioned haptic feedback panel provided by the embodiment of the present invention, as shown in fig. 5, the number of piezoelectric elements 3 may also be four, and each piezoelectric element 3 is disposed at each corner position of the substrate 2. This also achieves the effect that the substrate 2 resonates uniformly, and the number of piezoelectric elements 3 can be greatly reduced, reducing the cost.
In a specific implementation, in the above-mentioned haptic feedback panel provided by the embodiment of the present invention, as shown in fig. 6, the number of piezoelectric elements 3 may also be five, and each piezoelectric element 3 is disposed at a central position and each corner position of the substrate 2, respectively. This also achieves the effect that the substrate 2 resonates uniformly, and the number of piezoelectric elements 3 can be greatly reduced, reducing the cost.
In a specific implementation, in the above-mentioned haptic feedback panel provided by the embodiment of the present invention, as shown in fig. 1 to 6, the touch substrate 1 may be a metal touch pad, and the metal touch pad is used as a touch area structure of a notebook computer, for example, to implement haptic reproduction.
In a specific implementation, in the above-mentioned haptic feedback panel provided by the embodiment of the present invention, as shown in fig. 1 to 6, the touch substrate 1 may also be a display substrate, where the touch substrate 1 includes a display structure disposed on a side of the substrate 2 facing away from the piezoelectric element 3, and a touch layer disposed on a side of the display structure facing away from the substrate 2. This allows a haptic rendering technique to be combined with a display technique.
In the specific implementation process, the substrate may be a substrate made of glass, a substrate made of silicon or silicon dioxide (SiO 2), a substrate made of sapphire, a substrate made of a metal wafer, and the substrate may be set according to practical application requirements by those skilled in the art without limitation.
The touch feedback panel provided by the embodiment of the invention can be applied to the fields of medical treatment, automobile electronics, motion tracking systems and the like. The device is particularly suitable for the field of wearable equipment, the monitoring and treatment use in the medical body or the human body implantation, or the application in the fields of artificial intelligence such as electronic skin and the like. In particular, the haptic feedback panel may be applied to a brake pad, a keyboard, a mobile terminal, a game pad, a vehicle-mounted device, etc., which can generate vibration and mechanical characteristics.
Based on the same inventive concept, the embodiment of the invention also provides a haptic feedback device, which comprises the haptic feedback panel provided by the embodiment of the invention. Since the principle of the haptic feedback device for solving the problem is similar to that of the haptic feedback panel, the implementation of the haptic feedback device can be referred to the implementation of the haptic feedback panel, and the repetition is omitted.
In the implementation, the touch feedback device and the touch screen can be combined together, and the touch position of a human body can be determined through the touch screen, so that corresponding vibration waveforms, amplitudes and frequencies are generated, and man-machine interaction can be realized. For another example, the haptic feedback device can be multiplexed into a piezoelectric body, and the position of human touch is determined through the haptic feedback panel, so that corresponding vibration waveforms, amplitudes and frequencies are generated, and man-machine interaction can be realized. Of course, the haptic feedback device may also be applied to the fields of medical treatment, automotive electronics, motion tracking systems, etc. according to actual needs, and will not be described in detail herein.
According to the haptic feedback panel and the haptic feedback device provided by the embodiment of the invention, the corner positions and the center positions of the substrate are respectively and fixedly connected with the touch substrate through the corresponding supporting structures, so that when the piezoelectric element vibrates, the substrate and the touch substrate can be driven to generate uniform resonance, and the problem of insufficient local vibration displacement in the prior art can be completely solved. Therefore, by adopting the haptic feedback panel provided by the embodiment of the invention, a user can feel the same shock sensation when touching any position of the touch substrate, the haptic feedback effect is improved, and the user experience is enhanced.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims and the equivalents thereof, the present invention is also intended to include such modifications and variations.

Claims (12)

1. A haptic feedback panel, comprising:
a touch substrate;
the substrate base plate is arranged on the non-touch surface of the touch base plate;
the piezoelectric element is arranged on one side of the substrate base plate, which is away from the touch base plate; the piezoelectric element is used for vibrating under the action of an alternating electric field and driving the substrate and the touch substrate to resonate;
the support structure is arranged between the touch substrate and the substrate; and each corner position and the center position of the substrate are fixedly connected with the touch substrate through the corresponding supporting structures.
2. A haptic feedback panel as recited in claim 1 wherein support structures at each of said corner locations are centrally symmetrically distributed with respect to support structures at said center location.
3. A haptic feedback panel as recited in claim 1 wherein each of said support structures is of the same material and the sum of the areas of the support structures at each of said corner locations is equal to the area of the support structure at said center location.
4. A haptic feedback panel as recited in claim 3 wherein said support structure material comprises foam.
5. A haptic feedback panel as recited in claim 1 wherein said support structure includes a square or circular shape.
6. A haptic feedback panel as recited in claim 1 wherein said piezoelectric element is a PZT piezoelectric thin film structure or a piezoelectric ceramic bulk structure.
7. A haptic feedback panel as recited in claim 1 wherein said number of piezoelectric elements is one, said piezoelectric elements being disposed at a center location or one of corner locations of said substrate base.
8. A haptic feedback panel as recited in claim 1 wherein said piezoelectric elements are four in number, each of said piezoelectric elements being disposed at a respective corner location of said substrate base plate.
9. The haptic feedback panel of claim 1 wherein the number of piezoelectric elements is five, each of the piezoelectric elements being disposed at a center location and at each corner location of the substrate base plate, respectively.
10. A haptic feedback panel as recited in claim 1 wherein said piezoelectric elements are plural in number, and plural of said piezoelectric elements are arrayed on said substrate base plate.
11. A tactile feedback panel according to any one of claims 1-10, wherein the touch substrate is a metal touch pad or the touch substrate is a display substrate.
12. A haptic feedback device comprising the haptic feedback panel of any one of claims 1-11.
CN202310184223.7A 2023-02-24 2023-02-24 Haptic feedback panel and haptic feedback device Pending CN116185228A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310184223.7A CN116185228A (en) 2023-02-24 2023-02-24 Haptic feedback panel and haptic feedback device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310184223.7A CN116185228A (en) 2023-02-24 2023-02-24 Haptic feedback panel and haptic feedback device

Publications (1)

Publication Number Publication Date
CN116185228A true CN116185228A (en) 2023-05-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310184223.7A Pending CN116185228A (en) 2023-02-24 2023-02-24 Haptic feedback panel and haptic feedback device

Country Status (1)

Country Link
CN (1) CN116185228A (en)

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