CN111930237B - Haptic vibration feedback device and electronic device - Google Patents
Haptic vibration feedback device and electronic device Download PDFInfo
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- CN111930237B CN111930237B CN202010830999.8A CN202010830999A CN111930237B CN 111930237 B CN111930237 B CN 111930237B CN 202010830999 A CN202010830999 A CN 202010830999A CN 111930237 B CN111930237 B CN 111930237B
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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
- G06F3/016—Input arrangements with force or tactile feedback as computer generated output to the user
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Abstract
The invention relates to a tactile vibration feedback device and an electronic device. The haptic vibration feedback device includes: the touch display device comprises a first surface and a second surface which are arranged in a back-to-back manner, wherein the first surface is a light-emitting surface of the touch display device; the base is arranged on one side of the second surface of the touch display device and comprises a third surface facing the second surface; the actuating device comprises a movable magnet and an electromagnet, wherein the movable magnet is arranged on one side of the second surface of the touch display device, and the electromagnet is arranged on one side of the third surface of the base; the sensing module is used for sensing a pressure value received by the first surface of the touch display device, when the pressure value is larger than a pressure threshold value, the electromagnet is charged, and magnetic attraction is generated between the electromagnet and the moving magnet, so that the moving magnet drives the touch display device to move towards the electromagnet. The haptic vibration feedback device can prevent an erroneous response from being generated due to an erroneous operation.
Description
Technical Field
The present invention relates to the field of touch technologies, and in particular, to a haptic vibration feedback device and an electronic device.
Background
The in-vehicle center control display device generally includes a touch sensor and an image display device as user input interfaces, and an operation surface overlapping with a display screen outputs a signal corresponding to a displayed image by a touch operation performed by an operator. Since the vehicle may vibrate during running on a road, especially on a rough road, it is easy to accidentally trigger a control signal of the device, thereby making an erroneous response.
Disclosure of Invention
The invention aims to provide a tactile vibration feedback device and an electronic device, wherein the tactile vibration feedback device can generate vibration when touch pressure is larger than a pressure threshold value, and error response caused by misoperation is prevented.
In one aspect, the present invention provides a haptic vibration feedback device comprising: the touch display device comprises a first surface and a second surface which are arranged in a back-to-back manner, wherein the first surface is a light-emitting surface of the touch display device; the base is arranged on one side of the second surface of the touch display device and comprises a third surface facing the second surface; the actuating device comprises a movable magnet and an electromagnet, wherein the movable magnet is arranged on one side of the second surface of the touch display device, and the electromagnet is arranged on one side of the third surface of the base; the sensing module is used for sensing a pressure value received by the first surface of the touch display device, when the pressure value is larger than a pressure threshold value, the electromagnet is charged, and magnetic attraction is generated between the electromagnet and the moving magnet, so that the moving magnet drives the touch display device to move towards the electromagnet.
On the other hand, the invention also provides electronic equipment, which comprises the tactile vibration feedback device.
According to the tactile vibration feedback device and the electronic equipment, the touch pressure value received by the light emitting side of the touch display device can be sensed by the sensing module, and the tactile vibration feedback is generated only when the touch pressure value is larger than the pressure threshold value, so that the generation of error response due to misoperation can be prevented, and the power consumption is reduced. In addition, as the movable magnet of the actuating device is connected with the touch display device, the electromagnet is connected with the base, and the whole structure is a two-layer structure, the thickness is thinner, and the occupied space is smaller.
Drawings
Features, advantages, and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. In the drawings, like parts are designated with like reference numerals. The drawings are not drawn to scale, but are merely for illustrating relative positional relationships, and the layer thicknesses of certain portions are exaggerated in order to facilitate understanding, and the layer thicknesses in the drawings do not represent the actual layer thickness relationships.
FIG. 1 is a simplified schematic diagram of a haptic vibration feedback device according to an embodiment of the present invention;
FIG. 2 is a schematic side view of the haptic vibration feedback device shown in direction A in FIG. 1;
FIG. 3 is a schematic electrical structure of a control module in the haptic vibratory feedback device shown in FIG. 1;
FIG. 4 is a schematic structural view of a sensing module in the haptic vibration feedback device shown in FIG. 1;
FIG. 5 is a schematic view of a longitudinal sectional structure of a touch display device of the haptic vibration feedback device shown in FIG. 1;
FIG. 6 is an exploded schematic view of the haptic vibratory feedback device shown in FIG. 1;
FIG. 7 is a schematic structural view of an elastic member in the haptic vibration feedback device shown in FIG. 6;
Fig. 8 is a simplified schematic diagram of another haptic vibration feedback device provided by an embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the invention are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by showing examples of the invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order not to unnecessarily obscure the present invention; also, the size of the region structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The directional terms appearing in the following description are those directions shown in the drawings and do not limit the specific structure of the invention. In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
The in-vehicle center control display device generally includes a touch sensor and an image display device as user input interfaces, and an operation surface overlapping with a display screen outputs a signal corresponding to a displayed image by a touch operation performed by an operator. After the operator touches the image display device, the image display device generates tactile vibration feedback through the touch sensor. Since the vehicle vibrates during traveling on a road surface, particularly traveling on a rough road surface, it is easy to accidentally trigger a control signal of the in-vehicle center control display device, thereby making an erroneous response.
In the haptic vibration feedback device in the prior art, as the touch pressure judging mechanism is not arranged, whether the touch operation of the vehicle-mounted central control display device is the false operation caused by the pressing of the fingers of an operator or the vibration of the vehicle cannot be distinguished, so that the vehicle-mounted central control display device frequently responds in error.
In order to solve the above-described problems, embodiments of the present invention provide a haptic vibration feedback device, a structure of which is described in detail below with reference to the accompanying drawings. It should be noted that the present invention is not limited to the haptic vibration feedback device of the vehicle-mounted central control display device, and may be any haptic vibration feedback device in any application scenario.
Referring to fig. 1, a haptic vibration feedback device according to an embodiment of the present invention includes: the touch display device 1, the base 2, the actuating device 3 and the sensing module 4.
The touch display device 1 includes a first surface 11 and a second surface 12 disposed opposite to each other, and the first surface 11 is a light emitting surface of the touch display device 1. The touch display device 1 further comprises a touch sensor and an image display panel, wherein various function keys can be arranged on one side of the light emitting surface of the image display panel, and an operator can touch the function keys to realize corresponding functions, such as music playing, traffic road condition inquiry and the like.
As an alternative embodiment, the touch display device 1 may be an Organic Light-Emitting Diode (OLED) display panel. The OLED display panel has the characteristics of active light emission, high brightness, full-color display, low driving voltage, thin device thickness and the like. The light emitting element of the OLED display panel comprises a first electrode, a light emitting structure positioned on the first electrode, and a second electrode positioned on the light emitting structure. Either one of the first electrode and the second electrode is an anode, and the other is a cathode. The light emitting elements may include a red light emitting element, a green light emitting element, and a blue light emitting element, and RGB (red, green, and blue) three-color light emitting elements are transferred onto a substrate by a transfer technique to form a light emitting layer so that images can be normally displayed. The touch sensor may be integrated inside the OLED display panel, or may be disposed on the light emitting surface of the OLED display panel in an externally hung manner, which is not limited herein.
As an alternative embodiment, the touch display device 1 may also be a Liquid crystal display Module (LCM). The LCM includes a Liquid crystal display (Liquid CRYSTAL DISPLAY, LCD) and a backlight module, the LCD does not emit light, and the backlight module needs to be configured to provide a light source with enough brightness and uniform distribution, so that the LCD can normally display images. The light emitting element of the backlight module may include any one of a white light emitting diode, a Micro light emitting diode (Micro-LED), or a sub-millimeter light emitting diode (Mini-LED). Wherein Micro-LED refers to an LED chip with a grain size below 100 micrometers, mini-LED refers to an LED chip with a grain size of about 100-300 micrometers. The touch sensor may be integrated inside the LCD display panel, or may be disposed on the light emitting surface of the LCD display panel in an externally hung manner, which is not limited herein.
As an alternative embodiment, the touch display device 1 may also be an LED display. The light emitting elements of the LED display may be Micro-LEDs or Mini-LEDs. The Mini-LED/Micro-LED can be used as a self-luminous LED display, and has the advantages of low power consumption, high brightness, high resolution, high color saturation, high reaction speed, long service life, high efficiency and the like. The light emitting elements may include a red light emitting element, a green light emitting element, and a blue light emitting element, and RGB (red, green, and blue) three-color light emitting elements are transferred onto a substrate by a transfer technique to form a light emitting layer so that images can be normally displayed. The touch sensor may be integrated inside the LED display, or may be disposed on the light emitting surface of the LED display in an externally hung manner, which is not limited herein.
The base 2 is disposed on the second surface 12 side of the touch display device 1, and the base 2 includes a third surface 21 facing the second surface 12. For an OLED display panel or an LED display, the second surface 12 of the touch display device 1 is the side of the entire OLED display panel facing away from the light exit surface. For LCM, the second surface 12 of the touch display device 1 is a side of the backlight module facing away from the light emitting surface.
The actuating device 3 includes a moving magnet 31 and an electromagnet 32, the moving magnet 31 is disposed on the second surface 12 side of the touch display device 1, and the electromagnet 32 is disposed on the third surface 21 side of the base 2. Alternatively, the electromagnet 32 is a linear motor. The electromagnet 32 generally includes a magnetic core and a coil wound around the magnetic core that generates a magnetic field when a current is passed through the coil. The material of the moving magnet 31 has ferromagnetism, such as iron, nickel, cobalt, or other alloy materials with ferromagnetism. When the electromagnet 32 generates a magnetic field, the electromagnet 32 may generate a magnetic attraction force with the moving magnet 31, causing the moving magnet 31 to move toward the electromagnet 32.
The sensing module 4 is configured to sense a pressure value received by the first surface 11 of the touch display device 1, and when the pressure value is greater than a pressure threshold value, the electromagnet 32 charges and generates a magnetic attraction force with the moving magnet 31, so that the moving magnet 31 drives the touch display device 1 to move towards the electromagnet 32.
The range of the pressure threshold value can be verified through experiments, and in the embodiment of the invention, the range of the pressure threshold value is 0.5N-10N. Alternatively, the pressure threshold is 8N. Thus, when the pressure value sensed by the sensing module 4 is less than 8N, it can be judged that the pressure is a pressure generated by an erroneous operation, for example, an operator carelessly touches a function key of the touch display device 1 or an electric signal is sensed by the sensing module 4 due to vibration outside the touch display device 1, at which time it is unnecessary to charge the electromagnet 32, so that an erroneous response is not necessary.
When the pressure value sensed by the sensing module 4 is greater than 8N, it may be judged that the pressure is a pressure generated when the operator normally operates the touch display device 1. At this time, the electromagnet 32 may be charged, so that the current flowing in the coil generates a magnetic field, and the moving magnet 31 may drive the touch display device 1 to move toward the electromagnet 32 under the action of magnetic attraction.
The charging time of the electromagnet 32 is typically short, for example 5ms. For the conventional touch display device 1, the magnitude of the magnetic attraction generated instantaneously between the electromagnet 32 and the moving magnet 31 is generally 2N to 220N. The moving magnet 31 generates a certain acceleration at the moment of receiving the magnetic attraction force in the static state, and drives the touch display device 1 to move towards the electromagnet 32. For example, according to the transient simulation result, when the magnetic attraction force is 220N, the moving magnet 31 will generate the maximum acceleration of 8G, and the displacement amount driving the touch display device 1 to move towards the electromagnet 32 is about 0.5mm. The motion displacement of the touch display device 1 is generally small so as not to affect the use feeling of the operator. Such momentary movements of the touch display device 1 may generate tactile vibratory feedback to the operator informing the operator that the function key has been activated.
The moving magnet 31 moves towards the electromagnet 32, but is not required to be adsorbed with the electromagnet 32, a certain gap is kept between the moving magnet and the electromagnet, and the moving magnet and the electromagnet are prevented from collision to generate larger impact. After the electromagnet 32 is de-energized, the magnetic attraction force disappears, and the moving magnet 31 stops moving. When the operator operates the function keys again and the sensing module 4 senses that the pressure value is greater than the pressure threshold value, the electromagnet 32 is charged again, and the movable magnet 31 drives the touch display device 1 to move towards the electromagnet 32 again under the action of magnetic attraction, so that tactile vibration is generated and fed back to the operator.
In addition, the sensing module 4 may be configured to sense a pressure value received by the first surface 11, or may be configured to sense a magnitude of an electrical signal corresponding to the pressure value.
According to the tactile vibration feedback device provided by the invention, the sensing module 4 is arranged to sense the touch pressure value received by the light emitting side of the touch display device 1, and only when the touch pressure value is larger than the pressure threshold value, the tactile vibration feedback is generated to an operator, so that error response caused by misoperation can be prevented, and the power consumption is reduced. In addition, since the moving magnet 31 of the actuating device 3 is connected with the touch display device 1, the electromagnet 32 is connected with the base 2, and the whole structure is a two-layer structure, the thickness is thinner, and the occupied space is smaller.
Fig. 2 is a schematic side view of the tactile vibration feedback device shown in direction a in fig. 1.
Referring to fig. 1 and 2 together, the moving magnet 31 of the actuating device 3 at least partially overlaps with the orthographic projection of the electromagnet 32 in a plane perpendicular to the touch display device 1, and the moving magnet 31 and the electromagnet 32 are disposed at a predetermined distance along a direction parallel to the touch display device 1.
Since the touch display device 1 is generally placed in the horizontal direction, the moving magnet 31 of the actuating device 3 at least partially overlaps with the orthographic projection of the electromagnet 32 in the vertical plane, and the moving magnet 31 is disposed at a predetermined distance from the electromagnet 32 in the horizontal direction. Therefore, when the pressure value sensed by the sensing module 4 is greater than the pressure threshold value, the electromagnet 32 is charged, so that the current flowing in the coil generates a magnetic field, and magnetic attraction is generated between the position where the orthographic projections of the moving magnet 31 and the electromagnet 32 in the vertical plane overlap each other, so that the moving magnet 31 drives the touch display device 1 to move along the horizontal direction, and the tactile vibration in the horizontal direction is generated and fed back to the operator.
According to the ergonomic design, the sensitivity of human finger cortex to transverse vibration is higher than that of longitudinal vibration, and compared with the haptic vibration feedback device along longitudinal vibration in the prior art, the haptic vibration feedback device provided by the embodiment of the invention can enable an operator to obtain obvious haptic vibration feedback by only providing smaller current for the electromagnet 32, improves the sensitivity of human fingers to vibration, and reduces the system power consumption.
Fig. 3 is an electrical schematic diagram of a control module in the haptic vibration feedback device shown in fig. 1.
Referring to fig. 3, the haptic vibration feedback device provided by the embodiment of the present invention further includes a control module that provides a pulse electric signal to the electromagnet 32 when the pressure value sensed by the sensing module 4 is greater than the pressure threshold value. The control module may be disposed in the touch display device 1, and when the touch display device 1 is an LCM display module, the control module is disposed in the backlight module and electrically connected to the sensing module 4 and the electromagnet 32 through a wire. In addition, the control module may be disposed in a main control module of the vehicle-mounted central control display device, and electrically connected with the sensing module 4 and the electromagnet 32 through wires. The control module may also be disposed on the base 2, and the specific location is not limited.
Further, the control module includes: a storage unit 51, an analysis unit 52 and a power supply unit 53. Alternatively, the control module may be an IC or a circuit board, etc., without limitation.
The storage unit 51 is configured to store a pressure threshold, specifically, an electrical signal corresponding to the pressure threshold, where the pressure threshold can be set by itself within a range of values of the pressure threshold.
The analysis unit 52 is configured to compare the pressure value sensed by the sensing module 4 with a pressure threshold value, and if the pressure value is greater than the pressure threshold value, the power supply unit 53 provides a pulse electric signal to the electromagnet 32. The pulse electric signal may be a voltage signal or a current signal.
Further, the magnitude of the pulse electric signal provided by the control module is positively correlated with the weight of the touch display device 1. Since the moving magnet 31 will drive the touch display device 1 to move towards the electromagnet 32 under the action of magnetic attraction force, the magnitude of the pulse electric signal determines the magnitude of the magnetic attraction force. The magnitude of the magnetic attraction force is related to the weight of the touch display device 1 and the friction coefficient between the touch display device 1 and the peripheral side supporting device, and the greater the weight of the touch display device 1 is, the greater the magnetic attraction force is required, and the structure and the size of the magnetic core, the coil and the moving magnet 31 of the electromagnet 32 are required to be designed so as to meet the requirement of the magnetic attraction force.
Fig. 4 is a schematic structural view of a sensing module in the haptic vibration feedback device shown in fig. 1.
Referring to fig. 4, the control module is also electrically connected to the sensing module 4. Alternatively, the sensing module 4 is a strain gauge, the strain gauge includes a metal grid 40 and a first terminal 41 and a second terminal 42 connected to the metal grid 40, and the first terminal 41 and the second terminal 42 are electrically connected to the control module through wires. Either one of the first terminal 41 and the second terminal 42 is a positive terminal, and the other one of the first terminal 41 and the second terminal 42 is a negative terminal.
The strain gage generally further comprises a plastic film base having a thickness of about 15 μm to 16 μm and a film cover having a thickness of about 3 μm to 6 μm, with the metal grid 40 being sandwiched between the plastic film base and the film cover, and the metal grid 40 being made of a thin metal foil. When the device is used, the metal grid 40 is firmly adhered to the measuring point of the component, after the component is stressed, the measuring point is strained, the metal grid 40 is deformed along with the strain to change the resistance of the component, and an electric signal is output to the control module, the control module converts the electric signal into a strain value of the measuring point, and the control module can also directly convert the electric signal into the pressure value of the component because the strain value of the strain gauge is related to the pressure value of the component.
Referring to fig. 2 again, the haptic vibration feedback device further includes an elastic member 6, the elastic member 6 is disposed between the touch display device 1 and the base 2, and the sensing module 4 is disposed on the elastic member 6. The elastic member 6 deforms along the direction perpendicular to the touch display device 1 under the action of the pressure applied to the touch display device 1, and the strain gauge is arranged on the elastic member 6, so that the deformation of the elastic member 6 drives the strain gauge to change, and the strain gauge can convert the deformation of the elastic member 6 into a strain value, thereby obtaining the value of the pressure or the magnitude of an electric signal related to the pressure.
Further, the elastic member 6 is provided with a guide groove 61 extending parallel to the vibration direction of the electromagnet 32 and the moving magnet 31, the extending direction of the guide groove 61 is parallel to the vibration direction of the electromagnet 32, and the second surface 12 of the touch display device 1 is correspondingly provided with a guide protrusion 121, and the guide protrusion 121 can be accommodated in the guide groove 61.
In the embodiment of the invention, the vibration direction of the electromagnet 32 is the horizontal direction, the guide groove 61 extends along the horizontal direction, the second surface 12 of the touch display device 1 is correspondingly provided with the guide protrusion 121, and the touch display device 1 can move along the guide groove 61 through the guide protrusion 121, so that when the moving magnet 31 drives the touch display device 1 to move towards the electromagnet 32 under the action of magnetic attraction, the touch display device can move along the direction of the guide groove 61, and deflection caused by external interference in the movement process is prevented.
Fig. 5 is a schematic view illustrating a longitudinal sectional structure of a touch display device in the tactile vibration feedback device shown in fig. 1. As shown in fig. 5, the touch display device is an LCM display module, the first surface 11 of the liquid crystal display panel 1a is a light emitting surface, and the backlight module 1b is configured to provide a backlight source for the liquid crystal display panel 1 a. The side of the backlight module 1b facing away from the light emitting surface of the liquid crystal display panel 1a, i.e., the second surface 12, is provided with a guide protrusion 121, the guide protrusion 121 extends in a direction parallel to the vibration direction of the electromagnet 32 and the moving magnet 31, and the elastic member 6 is provided with a guide groove 61 accommodating the guide protrusion 121. In this embodiment, the touch display device is placed in a horizontal direction, and the guide protrusions 121 extend in the horizontal direction. When the electromagnet 32 is charged, the moving magnet 31 drives the touch display device 1 to move along the horizontal direction under the action of magnetic attraction, and generates the tactile vibration in the horizontal direction to be fed back to an operator.
It should be noted that, when the touch display device is an OLED display panel or an LED display, the guide protrusion 121 is disposed on the second surface 12 of the corresponding display panel on a side facing away from the light emitting surface, which is not described herein.
Fig. 6 is an exploded structural view of the haptic vibration feedback device shown in fig. 1, and fig. 7 is a schematic view of an elastic member in the haptic vibration feedback device shown in fig. 6.
As shown in fig. 7, the elastic member 6 includes: a fixing portion 62, a supporting portion 63, and a connecting portion 64.
The fixing portion 62 is fixedly connected to the base 2, and the fixing portion 62 and the base may be connected by a fastener, for example, a rivet, a latch member, a bolt, or the like, or may be welded, without limitation. The fixing portions 62 may be symmetrically disposed to improve stability of the elastic member 6.
The support portion 63 is used for supporting the touch display device 1, and the guide groove 61 is formed by recessing the support portion 63 toward the fixing portion 62.
The connection portion 64 is disposed between the fixing portion 62 and the supporting portion 63, and the connection portion 64 is disposed obliquely with respect to the fixing portion 62 or the supporting portion 63, and the sensing module 4 is disposed at the connection portion 64.
Alternatively, the fixing portion 62, the supporting portion 63, and the connecting portion 64 are formed by bending an integrally formed elastic piece. The supporting portion 63 is in direct contact with the touch display device 1, the touch pressure perpendicular to the light emitting side, received by the key on the light emitting side of the touch display device 1, can be directly transmitted to the connecting portion 64 through the supporting portion 63, the connecting portion 64 deforms under the pressure perpendicular to the light emitting side, the deformation is measured through the sensing module 4 arranged on the connecting portion 64, and the pressure value is obtained through conversion.
Alternatively, the connection portion 64 is disposed at an inclination angle of 20 ° to 50 ° with respect to the fixing portion 62 or the supporting portion 63, so that the connection portion 64 is more easily deformed under the effect of the touch pressure perpendicular to the light emitting side, and at this time, the inclination angle of the connection portion 64 with respect to the fixing portion 62 or the supporting portion 63 is changed, and the strain gauge senses the deformation amount, and then the pressure value is obtained through conversion.
In order to obtain the pressure value more accurately, the touch display device 1 is prevented from being unbalanced in stress, the number of the elastic members 6 is at least two, and the at least two elastic members 6 are arranged between the touch display device 1 and the base 2 at intervals. As shown in fig. 6, four elastic members 6 are respectively disposed around the base 2, and jointly support the touch display device 1. The four sensing modules 4 are respectively arranged at the connecting parts 64 of the corresponding elastic members 6, and the strain values measured by the four sensing modules 4 can be averaged during calculation and converted into touch pressure values for pressing the function keys by an operator.
It is understood that the number of the elastic members 6 may be three or more, without limitation.
Further, a first mounting seat 22 is provided on the third surface 21 side of the base 2 for fixing the electromagnet 32, for example, a threaded hole is provided on the mounting seat 22, and the electromagnet 32 is fixed to the mounting seat 22 by a fastener. Accordingly, a second mounting seat (not shown in the drawing) is provided on the second surface 12 side of the touch display device 1, and the second mounting seat may be provided with a threaded hole, or the second surface 12 side may be provided with a threaded hole, and the moving magnet 31 is fixed on the second surface 12 side of the touch display device 1 by a fastener.
Fig. 8 is a simplified schematic diagram of another haptic vibration feedback device provided by an embodiment of the present invention.
As shown in fig. 8, the haptic vibration feedback device provided by the embodiment of the invention further includes a housing 7, the touch display device 1 and the base 2 are accommodated in the housing 7, and a reset element 8 is disposed between two ends of the touch display device 1 along the vibration direction of the electromagnet 32 and a wall portion of the housing 7, and the reset element 8 is used for driving the moving magnet 31 to return to an initial position.
When the touch display device 1 is used for vehicle-mounted display, the housing 7 may be a part of a support structure of the vehicle-mounted center control display device, or may be a support structure fixedly connected with the vehicle-mounted center control display device.
Alternatively, the return member 8 is a return spring. When the coil of the electromagnet 32 is charged to generate a magnetic field, the moving magnet 31 moves toward the electromagnet 32 under the action of magnetic attraction, and the return spring is in a stretched state; when the coil de-energizing magnetic field of the electromagnet 32 disappears, the moving magnet 31 can return to the original position under the tension of the return spring. In this way, when the operator touches the operation again, the moving magnet 31 moves again from the initial position toward the electromagnet 32 by the magnetic attraction force, thereby generating tactile vibration feedback.
In addition, the haptic vibration feedback device provided by the embodiment of the invention further comprises a first stop 23 and a second stop 24 which are arranged on the base 2 at intervals, wherein the first stop 23 is arranged close to the initial position of the moving magnet 31, and the second stop 24 is arranged close to the electromagnet 32. The first stopper 23 and the second stopper 24 may be made of a rigid material that is not easily deformed, such as a metal.
In order to prevent the electromagnet 32 from generating excessive magnetic attraction force due to excessive energizing current, which causes the moving magnet 31 to instantaneously generate excessive acceleration to collide with the electromagnet 32 and damage the electromagnet 32, the second stopper 24 is arranged close to the electromagnet 32, so that when the moving magnet 31 approaches the electromagnet 32 under the action of the excessive magnetic attraction force, the moving magnet 31 contacts with the second stopper 24 first to prevent the moving magnet 31 from colliding with the electromagnet 32.
When the electromagnet 32 is powered off, the moving magnet 31 drives the touch display device 1 to be pulled back under the action of the pulling force of the return spring, the first stop piece 23 can limit the moving magnet 31 at the initial position, so that the touch display device 1 is prevented from crossing the initial position due to overlarge pulling force of the return spring, and when the electromagnet 32 is charged again, the magnetic attraction of a preset size cannot be generated between the moving magnet 31 and the electromagnet 32, and further expected tactile vibration feedback cannot be generated. Thus, the first stopper 23 and the second stopper 24 can ensure that the moving magnet 31 drives the touch display device 1 to move in a predetermined space, thereby generating expected tactile vibration feedback to an operator.
As an alternative embodiment, when the haptic vibration feedback device is used in other static electronic devices except the vehicle-mounted central control display device, the pressure threshold stored by the control module is smaller, for example, when the pressure threshold is 1N, the touch pressure of the finger of the human body is also smaller, for example, 2N, and accordingly, the movement displacement amount of the moving magnet 31 is also smaller, for example, 0.1mm. At this time, the tactile vibration feedback device does not need to be provided with a return spring, and an elastic pad (not shown in the figure) is arranged between the two ends of the touch display device 1 along the vibration direction of the electromagnet 32 and the wall part of the casing 7, and the elastic pad can be foam, rubber pad or the like, and is used for filling a gap between the touch display device 1 and the wall part of the casing 7 after moving along the vibration direction, so that shaking noise of the touch display device 1 in the casing 7 is avoided.
In addition, the embodiment of the invention also provides electronic equipment, which comprises the tactile vibration feedback device. The electronic equipment is not limited to the vehicle-mounted central control display device, and can be other electronic equipment which needs to provide tactile vibration feedback, and the value range of the pressure threshold can be determined after test verification according to the application occasion of the actual electronic equipment, and the description is omitted.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (13)
1.A haptic vibratory feedback device, comprising:
the touch display device comprises a first surface and a second surface which are arranged in a back-to-back mode, wherein the first surface is a light-emitting surface of the touch display device;
The base is arranged on one side of the second surface of the touch display device and comprises a third surface facing the second surface;
The actuating device comprises a moving magnet and an electromagnet, wherein the moving magnet is arranged on one side of the second surface of the touch display device, and the electromagnet is arranged on one side of the third surface of the base;
The sensing module is used for sensing a pressure value received by the first surface of the touch display device, and when the pressure value is larger than a pressure threshold value, the electromagnet is charged and generates magnetic attraction force with the moving magnet so that the moving magnet drives the touch display device to move towards the electromagnet; and
The elastic component is arranged between the touch display device and the base, the elastic component comprises a supporting part and a connecting part, the supporting part is used for supporting the touch display device, the connecting part is obliquely arranged relative to the supporting part, and the sensing module is arranged on the connecting part.
2. A tactile-vibration feedback device according to claim 1, wherein the moving magnet at least partially overlaps with an orthographic projection of the electromagnet in a plane perpendicular to the touch display device, the moving magnet and the electromagnet being disposed at a predetermined distance in a direction parallel to the touch display device.
3. A haptic vibration feedback device as recited in claim 1 further comprising a control module that provides a pulsed electrical signal to said electromagnet when a pressure value sensed by said sensing module is greater than said pressure threshold.
4. A haptic vibration feedback device as recited in claim 3 wherein said control module includes:
a storage unit for storing the pressure threshold;
An analysis unit for comparing the pressure value sensed by the sensing module with the pressure threshold;
And a power supply unit that supplies a pulse electric signal to the electromagnet if the pressure value is greater than the pressure threshold value.
5. A haptic vibration feedback device as recited in claim 3 wherein the magnitude of said pulsed electrical signal provided by said control module is positively correlated with the weight of said touch display device.
6. A haptic vibration feedback device as recited in claim 3 wherein said sensing module is a strain gauge including a metal grid and first and second terminals connected to said metal grid, said first and second terminals being electrically connected to said control module.
7. A tactile-vibration feedback device according to claim 1, wherein the elastic member is provided with a guide groove extending parallel to a vibration direction of the electromagnet, and the second surface of the touch display device is correspondingly provided with a guide protrusion which can be accommodated in the guide groove.
8. A haptic vibration feedback device as recited in claim 7 wherein said elastic member further comprises:
The fixing part is fixedly connected with the base;
the guide groove is formed by the support part being recessed toward the fixing part;
The connecting portion is arranged between the fixing portion and the supporting portion, and is obliquely arranged relative to the fixing portion.
9. A tactile-vibration feedback device according to claim 1, wherein the number of the elastic members is at least two, and at least two of the elastic members are disposed between the touch display device and the base at a distance from each other.
10. A tactile-vibration feedback device according to claim 1, further comprising a housing, wherein the touch display device and the base are accommodated in the housing, and a reset member is provided between both ends of the touch display device along the vibration direction of the electromagnet and the wall portion of the housing, and the reset member is configured to drive the moving magnet to return to an initial position.
11. A haptic vibration feedback device as recited in claim 1 further comprising a first stop and a second stop disposed on said base in spaced relation to each other, said first stop disposed proximate an initial position of said moving magnet and said second stop disposed proximate said electromagnet.
12. A tactile-vibration feedback device according to claim 1, wherein the pressure threshold has a value ranging from 0.5N to 10N.
13. An electronic device, comprising: a haptic vibration feedback device as claimed in any one of claims 1 to 12.
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| CN112558774B (en) * | 2020-12-10 | 2022-11-15 | 上海中航光电子有限公司 | Display device, vehicle and tactile feedback method |
| CN112558780A (en) * | 2020-12-23 | 2021-03-26 | 江西欧迈斯微电子有限公司 | Touch feedback module and electronic equipment |
| WO2024207191A1 (en) * | 2023-04-04 | 2024-10-10 | 瑞声科技（南京）有限公司 | Wearable device |
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