CN116643653A - Haptic feedback panel, haptic feedback method and haptic feedback device - Google Patents
Haptic feedback panel, haptic feedback method and haptic feedback device Download PDFInfo
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- CN116643653A CN116643653A CN202310560883.0A CN202310560883A CN116643653A CN 116643653 A CN116643653 A CN 116643653A CN 202310560883 A CN202310560883 A CN 202310560883A CN 116643653 A CN116643653 A CN 116643653A
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- WSMQKESQZFQMFW-UHFFFAOYSA-N 5-methyl-pyrazole-3-carboxylic acid Chemical compound CC1=CC(C(O)=O)=NN1 WSMQKESQZFQMFW-UHFFFAOYSA-N 0.000 description 1
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- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
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- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
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- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- 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
- G06F3/016—Input arrangements with force or tactile feedback as computer generated output to the user
-
- 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
- G06F3/0412—Digitisers structurally integrated in a display
-
- 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
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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 application provides a haptic feedback panel, a haptic feedback method thereof and a haptic feedback device, wherein the haptic feedback panel comprises: a touch substrate; the substrate base plate is arranged on the non-touch surface of the touch base plate; the piezoelectric sensor is arranged on one side, away from the touch substrate, of the substrate, and is configured to vibrate under the drive of an excitation signal so as to drive the substrate to vibrate; the control switches are arranged on one side, away from the touch substrate, of the substrate, orthographic projections of the control switches and the piezoelectric sensors on the substrate are not overlapped with each other, and each control switch is configured to control the corresponding area to be switched between a fixed state and a free state according to the touch position of the operating body on the touch substrate.
Description
Technical Field
The present application relates to the field of haptic feedback technology, and in particular, to a haptic feedback panel, a haptic feedback method thereof, 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, through control of the surface friction, simulation of different haptic/tactile sensations can be achieved.
Disclosure of Invention
The application provides a haptic feedback panel, a feedback method thereof and a haptic feedback device, which are used for improving haptic blind areas.
In a first aspect, embodiments of the present application provide 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 sensor is arranged on one side, away from the touch substrate, of the substrate, and is configured to vibrate under the drive of an excitation signal so as to drive the substrate to vibrate;
the control switches are arranged on one side, away from the touch substrate, of the substrate, orthographic projections of the control switches and the piezoelectric sensors on the substrate are not overlapped with each other, and each control switch is configured to control the corresponding area to be switched between a fixed state and a free state according to the touch position of the operating body on the touch substrate.
In one possible implementation, the plurality of control switches are located at a peripheral region of the substrate base plate and are disposed around the piezoelectric sensor.
In one possible implementation, the plurality of control switches includes a first set of control switches located at four corners of the substrate, the first set of control switches configured to simultaneously control each of the corner correspondence regions to switch between the fixed state and the free state, and a second set of control switches located at a center position of the substrate, the second set of control switches configured to simultaneously control the center position correspondence region to switch between the fixed state and the free state.
In one possible implementation, the control switch includes a metal patch and an electromagnet layer disposed corresponding to the metal patch, the electromagnet layer being spaced from the metal patch by a predetermined distance, the electromagnet layer being configured to attract the metal patch of the corresponding region when energized, to control the corresponding region to be in the fixed state.
In one possible implementation manner, the metal patch further comprises a supporting structure arranged on one side of the metal patch, which is away from the substrate, the supporting structure is located between the metal patch and the electromagnet layer, and the orthographic projection area of the supporting structure on the substrate is equal to the orthographic projection area of the metal patch on the substrate.
In one possible implementation, the sum of the thicknesses of the metal patch and the support structure is greater than the thickness of the piezoelectric sensor.
In one possible implementation, the material of the support structure includes at least one of foam, rubber, and foam.
In one possible implementation, the orthographic projection shape of the support structure on the substrate base plate includes at least one of a rectangle, a triangle, a circle, and a trapezoid.
In a second aspect, embodiments of the present application also provide a haptic feedback device, including:
a haptic feedback panel as claimed in any one of the preceding claims.
In a third aspect, an embodiment of the present application further provides a haptic feedback method of the haptic feedback panel as described in any one of the above, the haptic feedback method including:
obtaining a touch position of an operation body through the touch substrate;
adjusting the constraint mode of the corresponding area of the touch position through the plurality of control switches to obtain an adjusted mode;
and under the adjusted mode, loading the excitation signal to the piezoelectric sensor to drive the substrate to vibrate.
In one possible implementation manner, the plurality of control switches includes a first set of control switches located at four corners of the substrate, and a second set of control switches located at a central position of the substrate, where the first set of control switches corresponds to a first constraint mode, and the second set of control switches corresponds to a second constraint mode, and if the touch position is in the four corner corresponding regions, the adjusting, by the plurality of control switches, the constraint mode of the touch position corresponding region, to obtain an adjusted mode includes:
releasing the first constraint mode through the first group of control switches, and controlling the four corner corresponding areas to be in the free state;
triggering the second constraint mode through the second group of control switches, and controlling the area corresponding to the central position to be in the fixed state;
the adjusted pattern is obtained.
In one possible implementation manner, if the touch position is in the area corresponding to the central position, the adjusting, by the plurality of control switches, the constraint mode of the area corresponding to the touch position to obtain the adjusted mode includes:
releasing the second constraint mode through the second group of control switches, and controlling the region corresponding to the central position to be in the free state;
triggering the first constraint mode through the first group of control switches, and controlling the four corner corresponding areas to be in the fixed state;
the adjusted pattern is obtained.
The beneficial effects of the application are as follows:
the embodiment of the application provides a tactile feedback panel, a tactile feedback method and a tactile feedback device thereof, wherein a plurality of control switches are arranged on one side of a substrate base plate, which is far away from a touch base plate, and orthographic projections of the control switches and a piezoelectric sensor on the substrate base plate are not overlapped with each other. In this way, in the vibration process of the piezoelectric sensor, the control switch can control the corresponding area of the touch position of the operating body on the touch substrate to switch between the fixed state and the free state, so that more vibration modes can be excited. For example, when a user touches the vertex angle of the touch substrate, the vertex angle area is controlled to be in a free state through the corresponding control switch, so that the situation that the user cannot feel obvious vibration feedback in the vertex angle area is avoided. Therefore, the design of multiple vibration modes of the touch feedback panel is considered, and meanwhile, the touch blind area on the surface of the touch feedback panel is eliminated.
Drawings
FIG. 1 is a schematic top view of a haptic feedback panel according to an embodiment of the present application;
FIG. 2 is a schematic diagram of an exploded structure of a haptic feedback panel according to an embodiment of the present application;
FIG. 3 is a schematic cross-sectional view of one of the directions shown in MM in FIG. 1;
FIG. 4 is a schematic top view of a haptic feedback panel according to an embodiment of the present application;
FIG. 5 is a schematic view of another cross-sectional structure along the direction of MM in FIG. 1;
FIG. 6 is a schematic cross-sectional view of one of the directions indicated by NN in FIG. 4;
FIG. 7 is a flowchart of a haptic feedback method of a haptic feedback panel according to an embodiment of the present application;
FIG. 8 is a flowchart of one of the methods of step S102 in FIG. 7 when the touch position is in the area corresponding to the four corners;
FIG. 9 is a schematic diagram of a characteristic mode of the feedback method of FIG. 8 when the piezoelectric sensor is loaded with 200Hz in a first driving scheme;
FIG. 10 is a schematic representation of the vibration displacement over time when a piezoelectric transducer is loaded with a frequency of 200Hz in a first drive scheme using the feedback method of FIG. 8;
FIG. 11 is a flowchart of one method of step S102 in FIG. 7 when the touch position is in the area corresponding to the center position;
FIG. 12 is a schematic representation of vibration displacement over time when a piezoelectric transducer is loaded with a frequency of 80Hz in a second drive scheme using the feedback method of FIG. 8;
fig. 13 is a schematic diagram showing the vibration displacement over time when the piezoelectric transducer is loaded with a frequency of 80Hz in a second driving scheme using the feedback method shown in fig. 8.
Reference numerals illustrate:
10-a touch substrate; 20-a substrate base; 30-a piezoelectric sensor; 40-a plurality of control switches; 300-a piezoelectric device; 400-a first set of control switches; 500-a second set of control switches; 41-a metal patch; 42-an electromagnet layer; 43-support structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present application. It will be apparent that the described embodiments are some, but not all, embodiments of the application. And embodiments of the application 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 application fall within the protection scope of the present application.
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 application 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.
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 application only. And the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
In the related art, a structure for realizing the haptic reproduction technology is mostly to dispose a piezoelectric structure on a substrate, and then attach the substrate and a touch substrate together. By adopting the resonance principle, the resonance frequency of the substrate base plate is excited to generate resonance through the vibration of the piezoelectric structure, and larger vibration displacement is formed, so that the tactile feedback is realized. However, for such resonant modes of vibration, it is often necessary to constrain boundary conditions, such as bonding pads. However, because the cushion blocks are fixed and restrained, the displacement of the positions of the cushion blocks is basically 0 no matter what vibration mode, and the displacement does not become large along with the increase of voltage, so that a touch blind area exists on the surface of the vibration feedback substrate.
In view of the above, embodiments of the present application provide a haptic feedback panel, a feedback method thereof, and a haptic feedback device for improving a haptic blind area.
Fig. 1 to 3 show, wherein fig. 1 is a schematic top view of one of the haptic feedback panels according to the embodiment of the application, fig. 2 is a schematic exploded view of one of the whole structures of the haptic feedback panel, and fig. 3 is a schematic cross-sectional view of one of the directions shown in MM in fig. 1. Specifically, the haptic feedback panel includes:
a touch substrate 10;
a substrate 20 disposed on a non-touch surface of the touch substrate 10;
the piezoelectric sensor 30 is arranged on one side, away from the touch substrate 10, of the substrate 20, and the piezoelectric sensor 30 is configured to vibrate under the drive of an excitation signal so as to drive the substrate 20 to vibrate;
a plurality of control switches 40 disposed on a side of the substrate 20 facing away from the touch substrate 10, wherein orthographic projections of the plurality of control switches 40 and the piezoelectric sensor 30 on the substrate 20 do not overlap each other, and each control switch 400 is configured to control a corresponding region to switch between a fixed state and a free state according to a touch position of an operating body on the touch substrate 10.
In an embodiment of the present application, the haptic feedback panel includes: a touch substrate 10, a substrate 20, a piezoelectric sensor 30, and a plurality of control switches 40. For example, the touch substrate 10 may be a metal touch pad, which may be used as a touch area structure of a notebook computer to implement haptic reproduction. The touch substrate 10 may also be a display substrate, and accordingly, the touch substrate 10 includes a display structure disposed on a side of the substrate 20 facing away from the piezoelectric sensor 30 and a touch layer disposed on a side of the display decoupling strands facing away from the substrate 20; in this way, a combination of haptic rendering technology and display technology is achieved.
In the implementation process, the substrate 20 is disposed on the non-touch surface of the touch substrate 10. The substrate 20 may be a substrate made of glass, a substrate made of silicon dioxide (SiO 2), a substrate made of sapphire, or a substrate made of a metal wafer, for example, but is not limited thereto. Of course, those skilled in the art may set the substrate 20 according to practical application requirements, and is not limited herein.
In the implementation process, the piezoelectric sensor 30 is disposed on a side of the substrate 20 away from the touch substrate 10, and is configured to vibrate under the driving of the excitation signal, so as to drive the substrate 20 to vibrate. The piezoelectric sensor 30 is illustratively a piezoelectric thin film structure. The piezoelectric sensor 30 is illustratively a piezoceramic block structure. In this way, the thickness of the piezoelectric circuit or the piezoelectric element can be greatly reduced, and the light and thin design of the touch feedback panel is ensured.
Taking the piezoelectric sensor 30 as an example of a piezoelectric thin film structure, the piezoelectric sensor 30 may include a plurality of piezoelectric devices 300 arrayed on the substrate 20, thereby ensuring uniform vibration of the entire position of the substrate 20. Of course, the specific number of the piezoelectric devices 300 may be set according to practical application requirements, which is not limited herein. Wherein each piezoelectric device 300 includes a first electrode layer and a second electrode layer disposed opposite to each other and a piezoelectric material layer disposed between the first electrode layer and the second electrode layer, a first electricityThe electrode layer may be grounded, and the second electrode layer may be connected to the driving signal terminal. In this way, by applying a high-frequency alternating voltage signal (VAC) to the second electrode layer by the inverse piezoelectric effect, the application of the high-frequency alternating voltage signal to the piezoelectric material layer is realized, and the substrate 20 is driven to resonate, thereby realizing tactile reproduction. In addition, in the implementation process, the materials of the first electrode layer and the second electrode layer may be transparent conductive materials. For example, indium Tin Oxide (ITO), indium Zinc Oxide (IZO), etc., and of course, those skilled in the art may set materials of the first electrode layer and the second electrode layer according to practical application needs, and the materials are not limited herein. The piezoelectric material layer may be lead zirconate titanate (Pb (Zr, ti) O) 3 PZT), aluminum nitride (AlN), zinc oxide (ZnO), 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 ) At least one of the above, so that the vibration characteristics of the haptic feedback panel are ensured while the haptic feedback panel is transparent. Of course, the material for making the piezoelectric material layer may be specifically selected according to practical use requirements, and is not limited herein. When the piezoelectric material layer made of the PZT is used, the PZT has a high piezoelectric coefficient, so that the piezoelectric property of the corresponding haptic feedback panel is ensured, the corresponding haptic feedback panel can be applied to a 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 process, the plurality of control switches 40 are disposed on a side of the substrate 20 facing away from the touch substrate 10, and orthographic projections of the plurality of control switches 40 and the piezoelectric sensor 30 on the substrate 20 do not overlap each other. Still in combination with the exemplary embodiment shown in fig. 1, the piezoelectric sensor 30 includes a plurality of piezoelectric devices 300 distributed in an array, and orthographic projections of each piezoelectric device 300 and each control switch 40 on the substrate 20 do not overlap each other, so that interference between the piezoelectric sensor 30 and the control switch 40 is avoided, and usability of the haptic feedback panel is ensured. In practical applications, each control switch 40 is configured to control the corresponding region to switch between the fixed state and the free state according to the touch position of the operating body on the touch substrate 10. In this way, during the vibration of the piezoelectric sensor 30, the corresponding control switch 40 can control the switching of the operating body between the fixed state and the free state in the area corresponding to the touch position of the touch substrate 10, so that more vibration modes can be excited. The operation body may be a stylus, or may be a finger of a user, for example. For example, when a user touches the top corner of the touch substrate 10, the top corner region is controlled to be in a free state by the corresponding control switch 40, and the user can still feel more obvious vibration feedback in the top corner region, so that a touch blind area in the top corner region, which occurs because the user cannot feel the obvious vibration feedback, is avoided. For another example, when the user touches the central area of the touch substrate 10, the central area is controlled to be in a free state by the corresponding control switch 40, so that the user can still feel obvious vibration feedback in the central area, and a touch blind area in the central area, which occurs because the user cannot feel the obvious vibration feedback, is avoided. Therefore, the design of multiple vibration modes of the touch feedback panel can be realized, and meanwhile, the touch blind area on the surface of the touch feedback panel is eliminated.
In an embodiment of the present application, as shown in fig. 1 and 2, the plurality of control switches 40 are located in a peripheral area of the substrate 20 and are disposed around the piezoelectric sensor 30.
In the exemplary embodiment shown in fig. 1 and 2, the piezoelectric sensor 30 includes one piezoelectric device 300, and the number of the plurality of control switches 40 may be four. Each control switch 40 is located in a peripheral region of the substrate 20 and is disposed around the piezoelectric sensor 30. In this way, the resonance of the substrate 20 can be generated, and the touch blind area in the peripheral area of the substrate 20 can be largely eliminated.
In an embodiment of the present application, as shown in connection with fig. 4, the plurality of control switches 40 includes a first set of control switches 400 located at four corners of the substrate 20, the first set of control switches 400 being configured to simultaneously control each of the corner corresponding regions to switch between the fixed state and the free state, and a second set of control switches 500 located at a center position of the substrate 20, the second set of control switches 500 being configured to simultaneously control the center position corresponding region to switch between the fixed state and the free state.
Still in connection with the exemplary embodiment shown in fig. 4, piezoelectric sensor 30 includes seven piezoelectric devices 300 and eight control switches 40. The eight control switches 40 include a first set of control switches 400 located at four corners of the substrate 20, and a second set of control switches 500 located at a center position of the substrate 20. Accordingly, the first set of control switches 400 includes four control switches located at corners of the substrate 20, and the second set of control switches 500 includes four control switches located at a center position of the substrate 20. In practical application, the four control switches 40 positioned at the corners of the substrate 20 can be controlled simultaneously to switch the corner corresponding areas between a fixed state and a free state, so as to realize multi-mode control on the corner positions; the multi-mode control of the center position can also be achieved by simultaneously controlling four control switches located at the center position of the substrate 20 so that the center position corresponding region is switched between the fixed state and the free state.
In the embodiment of the present application, the control switch 40 includes a metal patch 41 and an electromagnet layer 42 disposed corresponding to the metal patch 41, where a preset distance is provided between the electromagnet layer 42 and the metal patch 41, and the electromagnet layer 42 is configured to attract the metal patch 41 in a corresponding area when energized, so as to control the corresponding area to be in the fixed state.
In the implementation process, a schematic diagram of a cross-sectional structure along the direction of MM in fig. 1 is shown in fig. 5. Each control switch 40 comprises a metal patch 41 and an electromagnet layer 42 arranged corresponding to the metal patch 41, wherein the electromagnet layer 42 is spaced from the metal patch 41 by a preset distance. Of course, the specific value of the preset distance may be set according to the actual application requirement, which is not limited herein. In practical application, the suction and disconnection of the metal patch 41 in the corresponding area can be flexibly controlled by controlling whether the electromagnet layer 42 is electrified or not, so that the flexible switching between the fixed state and the free state of the corresponding area is realized, and the multi-mode design of the touch feedback panel is ensured.
It should be noted that, each control switch 40 may be an electromagnetic switch, and when the electromagnet coil is energized, an electromagnetic attraction force is generated to pull the switch contact to close, so as to switch on a corresponding control circuit, thereby realizing control of the fixed state of the corresponding area. In the exemplary embodiment shown in fig. 5, the electromagnet layer 42 is illustrated for convenience only to illustrate the operating principle of the control switch 40, and no specific limitation on the electromagnet layer 42 is meant. In practical applications, the electromagnet layer 42 may be set according to practical application requirements, which will not be described in detail herein.
In an embodiment of the present application, still referring to fig. 5, the haptic feedback panel further includes a support structure 43 disposed on a side of the metal patch 41 facing away from the substrate 20, where the support structure 43 is located between the metal patch 41 and the electromagnet layer 42, and an orthographic projection area of the support structure 43 on the substrate 20 is equal to an orthographic projection area of the metal patch 41 on the substrate 20.
In an implementation, the haptic feedback panel further includes a support structure 43 disposed on a side of the metal patch 41 facing away from the substrate 20, and the support structure 43 is located between the metal patch 41 and the electromagnet layer 42. Accordingly, the support structure 43 can effectively support the substrate 20, and can adjust the characteristic frequency and characteristic mode of the substrate 20 to some extent. Illustratively, the haptic feedback panel further includes a fixing plate (not shown) for fixing the electromagnet layer 42, thereby ensuring structural stability of the control switch 40. In practical applications, the material for preparing the support structure 43 may be, but not limited to, foam, rubber, foam, polydimethylsiloxane (PDMS), etc., and the material for the support structure 43 may be selected according to specific needs, which is not limited herein. In addition, the number of the supporting structures 43 may be one or more, and the specific number of the supporting structures 43 may be set according to practical application, which is not limited herein. Moreover, the orthographic projection area of each support structure 43 on the substrate 20 is equal to the orthographic projection area of the metal patch 41 of the corresponding control switch 40 on the substrate 20. Accordingly, the front projection of each support structure 43 onto the substrate 20 coincides with the front projection of the metal patch 41 of the corresponding control switch 40 onto the substrate 20. Illustratively, the orthographic projection area of the metal patch 41 on the substrate base plate 20 is 2mm×2mm, and the orthographic projection area of the support structure 43 on the substrate base plate 20 is 2mm×2mm. Of course, specific values of the orthographic projection areas of the support structures 43 and the corresponding metal patches 41 may be set according to practical application requirements, which is not limited herein.
It should be noted that, for the same control switch 40, the orthographic projection of the metal patch 41 on the substrate 20 falls completely within the area of the orthographic projection of the electromagnet layer 42 on the substrate 20; accordingly, the orthographic projection area of the metal patch 41 on the substrate 20 is smaller than the orthographic projection area of the electromagnet layer 42 on the substrate 20, thereby ensuring the control capability of the control switch 40. Illustratively, the orthographic projection area of the metal patch 41 on the substrate 20 is 2mm×2mm, and the orthographic projection area of the electromagnet layer 42 on the substrate 20 is 3mm×3mm. In practical application, after the electromagnet layer 42 is electrified, electromagnetic attraction force is generated, and the metal patch 41 can be pulled to close the contact, so that the position of the corresponding area is fixed, and the mode adjustment of the touch feedback panel is realized.
In an embodiment of the present application, the sum of the thicknesses of the metal patch 41 and the support structure 43 is greater than the thickness of the piezoelectric sensor 30. For example, as shown in fig. 6, which is a schematic view of a cross-sectional structure along the direction NN shown in fig. 4, a represents the thickness of the metal patch 41, b represents the thickness of the supporting structure 43, c represents the thickness of the piezoelectric sensor 30, and satisfies the formula: (a+b) > c, thereby ensuring the supporting performance of the supporting structure 43 and thus the vibration characteristics of the haptic feedback panel while simultaneously taking account of the control of the mode of the substrate 20 by the control switch 40 through the metal patch 41. Of course, specific values of the thicknesses of the metal patch 41, the support structure 43, and the piezoelectric sensor 30 may be set according to practical application requirements, and are not limited herein.
In an embodiment of the present application, the orthographic projection shape of the support structure 43 on the substrate 20 includes at least one of rectangle, triangle, circle, trapezoid. Of course, the specific shape of the support structure 43 may be set according to practical application requirements, which is not limited herein.
The haptic feedback panel provided in the embodiments of the present application may further include other film layers well known to those skilled in the art, in addition to the above-mentioned film layer structure, and will not be described in detail herein. In addition, the touch feedback panel can be applied to the fields of medical treatment, automobile electronics, motion tracking systems and the like, and is particularly suitable for the fields of wearable equipment, medical treatment in vitro or human body implantation monitoring and treatment, or the fields of artificial intelligence electronic skin and the like. Specifically, the haptic feedback panel may be applied to a brake pad, a keyboard, a mobile terminal, a game pad, a vehicle-mounted, smart home, etc. panel that can generate vibration and mechanical characteristics.
Based on the same inventive concept, embodiments of the present application provide a haptic feedback device including a haptic feedback panel as described in any one of the above.
The principle of the haptic feedback device for solving the problem is similar to that of the haptic feedback panel, so that the implementation of the haptic feedback device can be referred to the implementation of the haptic feedback panel, and the repetition is omitted.
In a specific implementation process, the haptic feedback device provided by the embodiment of the application can be any product or component with a display function or a touch control function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the haptic feedback device will be understood by those skilled in the art, and will not be described in detail herein, nor should they be considered as limiting the application.
In a specific implementation, the haptic feedback device provided in the embodiments of the present application may further include other film layers well known to those skilled in the art, which are not described in detail herein.
In the implementation process, the touch position of the operating body can be determined through the touch feedback device, so that corresponding vibration waveforms, amplitudes and frequencies are generated, and man-machine interaction can be realized. Of course, the haptic feedback device may be applied to the fields of medical treatment, automotive electronics, motion tracking, etc. according to actual needs, and is not limited herein.
Based on the same inventive concept, as shown in fig. 7, an embodiment of the present application further provides a haptic feedback method of the haptic feedback panel as described in any one of the above, the haptic feedback method including:
s101: obtaining a touch position of an operation body through the touch substrate;
s102: adjusting the constraint mode of the corresponding area of the touch position through the plurality of control switches to obtain an adjusted mode;
s103: and under the adjusted mode, loading the excitation signal to the piezoelectric sensor to drive the substrate to vibrate.
In the specific implementation, reference may be made to the description of the relevant parts above for the specific structure of the haptic feedback panel, which is not described in detail herein. Specifically, the specific implementation procedure of step S101 to step S103 is as follows:
first, a touch position of an operation body is obtained through a touch substrate. By way of example, a user's finger touches the haptic feedback panel, and the position of the finger is determined by the touch layer in the touch substrate, thereby obtaining the touch position of the user's finger. Then, the constraint mode of the touch position corresponding region is adjusted by a plurality of control switches, and the adjusted mode is obtained. For example, when a finger of a user touches any corner position of the substrate, the fixed constraint on the corner position is released through a control switch corresponding to the corner position, and the corner position is switched from a fixed state to a free state; meanwhile, the other position areas are restrained by control switches corresponding to other positions except the corner positions; thereby obtaining the mode adjusted by the control switch. Then, in the adjusted mode, an excitation signal is loaded to the piezoelectric sensor to drive the substrate to vibrate. Thereby guaranteeing the vibration characteristics of the haptic feedback panel.
Illustratively, as still shown in connection with FIG. 4, the plurality of control switches in the haptic feedback panel are divided into a first set of control switches located at the four corners of the substrate and a second set of control switches located at the center of the substrate; the first group of control switches comprises four control switches respectively positioned at four corners of the substrate, and the second group of control switches comprises four control switches respectively positioned at the central position of the substrate; the first set of control switches corresponds to a first constraint mode and the second set of control switches corresponds to a second constraint mode.
Accordingly, there may be two driving schemes for the haptic feedback method of the haptic feedback panel, in the first driving scheme, as shown in fig. 8, if the touch position is in the four corner corresponding regions, step S102: adjusting the constraint mode of the touch position corresponding area through the plurality of control switches to obtain an adjusted mode, wherein the method comprises the following steps:
s201: releasing the first constraint mode through the first group of control switches, and controlling the four corner corresponding areas to be in the free state;
s202: triggering the second constraint mode through the second group of control switches, and controlling the area corresponding to the central position to be in the fixed state;
s203: the adjusted pattern is obtained.
In the implementation process, the implementation process of step S201 to step S203 is as follows:
if the touch position is in the four corner corresponding areas, the first constraint mode can be released through the first group of control switches. The method comprises the steps that power-off processing is conducted on a first group of control switches located at four corners of a substrate, so that constraint on areas where corresponding corners are located is relieved, the areas corresponding to the four corners are controlled to be in a free state, and further, the first constraint mode is relieved through the first group of control switches; meanwhile, the second group of control switches positioned at the central position of the substrate base plate can be electrified, so that the area where the corresponding central position is positioned is restrained by electromagnetic attraction, the area corresponding to the control central position is in a fixed state, and further, the triggering of a second restraint mode is realized through the second group of control switches. In this way, an adjusted pattern is obtained. Fig. 9 is a schematic view showing a characteristic mode when the piezoelectric sensor is loaded with 200Hz in the first driving scheme, and fig. 10 is a schematic view showing a change with time of vibration displacement when the piezoelectric sensor is loaded with 200Hz in the first driving scheme. In this exemplary embodiment, a 200Hz excitation signal may be loaded to the piezoelectric sensor to drive the substrate to vibrate, where the vibration amplitude may reach more than 20 μm.
In the second driving scheme, as shown in fig. 11, if the touch position is in the region corresponding to the center position, step S102: adjusting the constraint mode of the touch position corresponding area through the plurality of control switches to obtain an adjusted mode, wherein the method comprises the following steps:
s301: releasing the second constraint mode through the second group of control switches, and controlling the region corresponding to the central position to be in the free state;
s302: triggering the first constraint mode through the first group of control switches, and controlling the four corner corresponding areas to be in the fixed state;
s303: the adjusted pattern is obtained.
In the implementation process, the implementation process of step S301 to step S303 is as follows:
and if the touch position is in the area corresponding to the central position of the substrate base plate, the second constraint mode can be released through the second group of control switches. The second group of control switches positioned at the central position of the substrate board is subjected to endpoint processing, so that the constraint of the area where the corresponding central position is positioned is contacted, the area where the control central position is positioned is in a free state, and further, the release of the second constraint mode is realized through the second group of control switches. Meanwhile, the first group of control switches positioned at the corner positions of the substrate can be electrified, so that the area where the corresponding corner positions are positioned is restrained by electromagnetic attraction, the area corresponding to the corner positions is controlled to be in a fixed state, and further, the triggering of a first restraint mode is realized through the first group of control switches. In this way, an adjusted pattern is obtained. Fig. 12 is a schematic view showing a characteristic mode when the piezoelectric sensor is charged with 80Hz in the second driving scheme, and fig. 13 is a schematic view showing a change with time of a vibration displacement when the piezoelectric sensor is charged with 80Hz in the second driving scheme. In this exemplary embodiment, an excitation signal of 80Hz may be applied to the piezoelectric sensor to vibrate the substrate base plate, with the vibration amplitude at the center position being much greater than 20 μm.
It should be noted that in the above-mentioned exemplary embodiment, with the second driving scheme, the vibration amplitude at the corner position, which is a fixed constraint, is only 6 μm, and does not significantly increase with an increase in driving voltage. When the finger is detected to touch the corner position, a touch blind area appears, and the user cannot feel obvious vibration feedback. At this time, the second driving scheme can be switched to the first driving scheme, thereby ensuring that the vibration amplitude at the corner position can reach more than 20 μm, thereby avoiding the occurrence of a tactile blind area at the corner position, and ensuring the vibration characteristic of the tactile feedback panel.
In the implementation process, the plurality of control switches in the haptic feedback panel may be divided into two groups, and further divided into more groups, and correspondingly, there may be further multiple constraint modes, and correspondingly, the driving feedback of the haptic feedback panel may be different, which will not be described in detail herein.
The embodiment of the application provides a tactile feedback panel, a tactile feedback method and a tactile feedback device thereof, wherein a plurality of control switches are arranged on one side of a substrate base plate, which is far away from a touch base plate, and orthographic projections of the control switches and a piezoelectric sensor on the substrate base plate are not overlapped with each other. In this way, in the vibration process of the piezoelectric sensor, the control switch can control the corresponding area of the touch position of the operating body on the touch substrate to switch between the fixed state and the free state, so that more vibration modes can be excited. For example, when a user touches the vertex angle of the touch substrate, the vertex angle area is controlled to be in a free state through the corresponding control switch, so that the situation that the user cannot feel obvious vibration feedback in the vertex angle area is avoided. Therefore, the design of multiple vibration modes of the touch feedback panel is considered, and meanwhile, the touch blind area on the surface of the touch feedback panel is eliminated.
While preferred embodiments of the present application 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 application.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
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 sensor is arranged on one side, away from the touch substrate, of the substrate, and is configured to vibrate under the drive of an excitation signal so as to drive the substrate to vibrate;
the control switches are arranged on one side, away from the touch substrate, of the substrate, orthographic projections of the control switches and the piezoelectric sensors on the substrate are not overlapped with each other, and each control switch is configured to control the corresponding area to be switched between a fixed state and a free state according to the touch position of the operating body on the touch substrate.
2. The haptic feedback panel of claim 1 wherein the plurality of control switches are located in a peripheral region of the substrate base and are disposed around the piezoelectric sensor.
3. The haptic feedback panel of claim 2 wherein the plurality of control switches comprises a first set of control switches located at four corners of the substrate, the first set of control switches configured to simultaneously control each of the corner correspondence regions to switch between the fixed state and the free state, and a second set of control switches located at a center position of the substrate, the second set of control switches configured to simultaneously control the center position correspondence region to switch between the fixed state and the free state.
4. A haptic feedback panel as recited in any one of claims 1-3 wherein said control switch includes a metal patch and an electromagnet layer disposed in correspondence with said metal patch, said electromagnet layer being a predetermined distance from said metal patch, said electromagnet layer being configured to attract said metal patch of a corresponding region when energized, controlling said corresponding region to be in said fixed state.
5. The haptic feedback panel of claim 4 further comprising a support structure disposed on a side of the metal patch facing away from the substrate, the support structure being located between the metal patch and the electromagnet layer, an orthographic projection area of the support structure on the substrate being equal to an orthographic projection area of the metal patch on the substrate.
6. The haptic feedback panel of claim 5 wherein a sum of thicknesses of the metal patch and the support structure is greater than a thickness of the piezoelectric sensor.
7. The haptic feedback panel of claim 6 wherein the material of the support structure comprises at least one of foam, rubber, foam.
8. The haptic feedback panel of claim 7 wherein the orthographic projection shape of the support structure on the substrate base plate comprises at least one of rectangular, triangular, circular, trapezoidal.
9. A haptic feedback device, comprising:
the haptic feedback panel of any of claims 1-8.
10. A haptic feedback method for use with a haptic feedback panel as recited in any one of claims 1-8 including:
obtaining a touch position of an operation body through the touch substrate;
adjusting the constraint mode of the corresponding area of the touch position through the plurality of control switches to obtain an adjusted mode;
and under the adjusted mode, loading the excitation signal to the piezoelectric sensor to drive the substrate to vibrate.
11. The method of claim 10, wherein the plurality of control switches includes a first set of control switches located at four corners of the substrate and a second set of control switches located at a center position of the substrate, the first set of control switches corresponding to a first constraint pattern and the second set of control switches corresponding to a second constraint pattern, the adjusting the constraint pattern of the touch location corresponding region by the plurality of control switches if the touch location is at the four corner corresponding region, the obtaining an adjusted pattern comprising:
releasing the first constraint mode through the first group of control switches, and controlling the four corner corresponding areas to be in the free state;
triggering the second constraint mode through the second group of control switches, and controlling the area corresponding to the central position to be in the fixed state;
the adjusted pattern is obtained.
12. The method of claim 11, wherein adjusting the constraint pattern of the touch location responsive zone by the plurality of control switches if the touch location is in the center location responsive zone, comprises:
releasing the second constraint mode through the second group of control switches, and controlling the region corresponding to the central position to be in the free state;
triggering the first constraint mode through the first group of control switches, and controlling the four corner corresponding areas to be in the fixed state;
the adjusted pattern is obtained.
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| CN202310560883.0A CN116643653A (en) | 2023-05-17 | 2023-05-17 | Haptic feedback panel, haptic feedback method and haptic feedback device |
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| CN202310560883.0A CN116643653A (en) | 2023-05-17 | 2023-05-17 | Haptic feedback panel, haptic feedback method and haptic feedback device |
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