CN114764281A - Key module, electronic device and key operation identification method - Google Patents

Abstract

The disclosure relates to a key module, an electronic device and a key operation identification method, including: the ultrasonic guided wave transceiver is used for generating an ultrasonic guided wave detection signal and detecting a feedback signal returned based on the detection signal; a touch key body positioned at one side of the terminal housing for detecting the signal transmission direction; the touch key body is used for generating a feedback signal based on the detection signal, wherein the deformation degree of the touch key body is different, and the signal parameter of the feedback signal is different; and the transmitting parameter of the detection signal and the receiving parameter of the feedback signal are used for determining the operation parameter of the touch operation acting on the touch key body. And determining whether the touch key body is touched according to the detection signal and different feedback signals, so as to realize the key function.

Description

Key module, electronic device and key operation identification method

Technical Field

The present disclosure relates to the field of electronic devices, and in particular, to a key module, an electronic device, and a method for identifying key operations.

Background

In recent years, portable electronic devices, especially smart phones, have been developed rapidly, and have become essential communication and entertainment tools in life. Meanwhile, the consumer's demand for innovativeness of electronic devices is also increasing, and the application of various black technologies in electronic devices is rare. The key serves as one of the standard configurations of the electronic equipment and is used for receiving a touch instruction of a user. The current keys are still mainly traditional mechanical keys, and the keys compress the elastic sheet by using the key body subjected to acting force, and the elastic sheet is conducted with the circuit of the circuit board to realize touch operation. At present, the key type is single, and the requirement of innovativeness of electronic equipment by consumers cannot be met.

Disclosure of Invention

The disclosure provides a key module, an electronic device and a key operation identification method.

According to a first aspect of the embodiments of the present disclosure, a key module is provided, including:

the ultrasonic guided wave transceiver is used for generating an ultrasonic guided wave detection signal and detecting a feedback signal returned based on the detection signal;

a touch key body positioned at one side of the terminal housing for detecting the signal transmission direction; the touch key body is used for generating a feedback signal based on the detection signal, wherein the deformation degree of the touch key body is different, and the signal parameters of the feedback signal are different; and the transmitting parameter of the detection signal and the receiving parameter of the feedback signal are used for determining the operating parameter of the touch operation acted on the touch key body.

In some embodiments, the ultrasonic guided wave transceiver comprises:

a coil;

a magnetostrictive body wound by the coil and used for generating the detection signal under the action of an alternating magnetic field generated by current change in the coil and detecting the feedback signal returned based on the detection signal;

the touch key body is arranged on one side of the mobile terminal shell along the ultrasonic guided wave transmission direction and is arranged at intervals with the magnetostrictive body.

In some embodiments, the magnetostrictive body comprises:

an emitter for generating the detection signal;

the receiving body is arranged in parallel with the emitting body and is used for receiving the feedback signal;

the coil includes:

an excitation coil wound on the emitter for generating an alternating magnetic field;

and the receiving coil is wound on the receiving body and is used for generating a feedback electric signal according to the feedback signal.

In some embodiments, the emitter and the receiver are provided separately;

the touch key body is located between the emitter body and the receiver body.

In some embodiments, the transmission parameters include: the emission time of the detection signal; the receiving parameters comprise: a time of receipt of the feedback signal; the transmitting time and the receiving time are used for determining the position of the touch operation acting on the touch key body;

alternatively, the first and second liquid crystal display panels may be,

the transmission parameters include: a transmit phase of the detection signal; the receiving parameters comprise: a receive phase of the feedback signal; the transmitting phase and the receiving phase are used for determining the position of the touch operation acting on the touch key body.

In some embodiments, the transmitting signal further comprises: the emission amplitude of the detection signal; the receiving parameters include:

a received amplitude of the feedback signal;

the transmitting amplitude and the receiving amplitude are used for determining the pressing force degree applied to the touch key body.

In some embodiments, the key module further comprises:

the operation module is connected with the ultrasonic guided wave transceiver;

and the operation module is used for determining the position of the touch key body according to the signal parameters.

According to a second aspect of the embodiments of the present disclosure, there is provided an electronic apparatus including:

the key module according to any of the above embodiments.

In some embodiments, the electronic device further comprises:

a middle frame;

and the part of the middle frame is multiplexed as a touch key body of the key module.

In some embodiments, the middle frame comprises:

a base plate;

the frame is positioned at the edge of the bottom plate;

and the part of the frame is reused as the touch key body of the key module.

In some embodiments, the middle frame further comprises:

and the retaining wall is positioned between the frame and the central position of the bottom plate, and forms an accommodating space together with the frame, and the accommodating space accommodates the ultrasonic guided wave transceiver.

In some embodiments, the electronic device further comprises:

and a coupling agent for bonding the frame and the magnetostrictive body wound with the coil.

According to a third aspect of the embodiments of the present disclosure, there is provided a method for identifying a key operation, which is used in the key module according to any of the embodiments, and includes:

transmitting a detection signal and recording the transmission parameter of the detection signal;

detecting a feedback signal returned based on the detection signal to obtain a receiving parameter of the feedback signal;

and determining the operation parameters of the touch key body subjected to touch operation according to the transmitting parameters and the receiving parameters.

In some embodiments, the identification method further comprises:

acquiring detection parameters of the detection signals;

the determining that the touch key body is subjected to touch operation according to the difference of the signal parameters received at different moments comprises:

determining the position of the touch key body according to the receiving time of the feedback signal and the transmitting time of the detection signal; or the like, or, alternatively,

and determining the position of the touch key body according to the phase of the feedback signal and the phase of the detection signal.

In some embodiments, the determining that the touch key body is subjected to the touch operation according to the difference of the signal parameters received at different time includes:

and determining the force value of the acting force applied to the touch key body according to the amplitude of the feedback signal.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

according to the embodiments, the ultrasonic guided wave detection signal is generated by the ultrasonic guided wave transceiver. The touch key forms a feedback signal based on the detection signal. The touch key body has different deformation degrees when being touched or not touched. Different deformation degrees further form different feedback signals, whether the touch key body is touched can be determined according to the detection signals and the different feedback signals, and the key function is achieved. The utility model provides a new button module has richened the button kind, has improved user experience.

Therefore, the operation parameters of the touch operation can be determined by using the detection parameters of the detection signal and the signal parameters of the feedback signal.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is one of the partial block diagrams of an electronic device shown in accordance with an exemplary embodiment;

FIG. 2 is a second schematic diagram illustrating a partial structure of an electronic device according to an exemplary embodiment;

FIG. 3 is a third schematic diagram illustrating a partial structure of an electronic device in accordance with an exemplary embodiment;

FIG. 4 is a fourth partial schematic structural diagram of an electronic device shown in accordance with an exemplary embodiment;

FIG. 5 is a fifth partial structural schematic diagram of an electronic device shown in accordance with an exemplary embodiment;

FIG. 6 is a sixth partial schematic structural view of an electronic device shown in accordance with an exemplary embodiment;

fig. 7 is a block diagram illustrating a configuration of a key operation recognition apparatus according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of devices consistent with certain aspects of the present disclosure, as detailed in the appended claims.

In the description of the present disclosure, it is to be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown by a user when actually using the electronic apparatus.

The embodiment of the present disclosure provides a key module, including:

the ultrasonic guided wave transceiver is used for generating an ultrasonic guided wave detection signal and detecting a feedback signal returned based on the detection signal;

the touch key body 40 is arranged on one side of the mobile terminal shell along the transmission direction of the ultrasonic guided waves, the deformation degree of the touch key body is different, and the signal parameters of the feedback signals are different; and the transmitting parameter of the detection signal and the receiving parameter of the feedback signal are used for determining the operation parameter of the touch operation acting on the touch key body.

In practical applications, the touch key body may be a key region formed in a middle frame or other housing portion of the terminal. When the button region deforms, the ultrasonic guided wave transceiver can determine the operating parameters of touch operation according to the detection signals and the feedback signals. Operating parameters include, but are not limited to: pressing position, pressing pressure degree, pressing time, and the like. Different operating parameters may be directed to different outlet operations to perform different key functions. For example: the touch key body which is pressed for a long time at a certain position is powered off. The continuous change of the pressing position of a certain key area indicates the sliding operation, and the key function is the volume adjustment.

Accordingly, the present disclosure utilizes an ultrasonic guided wave transceiver to generate an ultrasonic guided wave detection signal. The touch key forms a feedback signal based on the detection signal. The touch key body has different deformation degrees when being touched or not touched. Different deformation degrees further form different feedback signals, whether the touch key body is touched can be determined according to the detection signals and the different feedback signals, and the key function is achieved. The utility model provides a new button module has richened the button kind, has improved user experience.

In some embodiments, an ultrasonic guided wave transceiver comprises:

a coil 30;

a magnetostrictive body 20 wound by the coil 30 and configured to generate a detection signal under an alternating magnetic field generated by a change in current in the coil and detect a feedback signal returned based on the detection signal;

the touch key body 40 is disposed at one side of the mobile terminal housing along the transmission direction of the ultrasonic guided wave, and is spaced apart from the magnetostrictive body 20.

In embodiments of the present disclosure, the magnetostrictive body comprises magnetostrictive materials including, but not limited to: rare earth magnetostrictive materials, iron, cobalt, nickel metals, and their alloy materials. By utilizing the magnetostrictive effect, under the action of an alternating magnetic field generated by the change of current in the coil, the magnetostrictive body can generate extension and shortening changes in the direction of the magnetic field, and when the magnetic field conversion frequency reaches a certain degree, the change of the magnetostrictive body can generate micro vibration to form a detection signal.

Typically, a feedback signal is formed when the detection signal is obstructed in the transmission medium. The feedback signal affects the change in elongation and contraction of the magnetostrictive body. According to the inverse magnetostriction effect, due to the fact that the magnetostrictors stretch and shorten, alternating magnetic fields are generated inside the magnetostrictors, the changes of the magnetic fields cause changes of electric fields in coils, and therefore reflected feedback signals can generate changes of electric signals to be recognized.

In a specific example, as shown in fig. 6, the coil 30 may be wound in a spiral manner in the axial direction of the magnetostrictive body 20. An alternating current is applied to the coil 30, and the alternating current of the spiral generates an alternating magnetic field.

The touch key body includes, but is not limited to: a volume key and a power key.

The touch parameters include: the position of the touch key body and the force value of the acting force received by the touch key body.

The touch key body is touched by the finger: the touch key body is subjected to an acting force, and the acting force reaches a preset value.

The touch key body is not touched by a finger: the touch key body is not subjected to the acting force, or the acting force applied to the touch key body does not reach the preset value.

The function corresponding to the touch key body can be triggered only when the acting force acting on the touch key body reaches a preset value, so that the risk of mistakenly opening the key function due to accidental touch can be reduced.

In a specific application, if there is at least one touch key body in the transmission path of the detection signal, a set of coils and magnetostrictors can be used to determine the operation parameters of the touch operation of the at least one touch key body. As shown in fig. 3, a set of the coil 30 and the magnetostrictive body 20 can be used simultaneously to determine the operation parameters of the touch operations of the volume up touch key body 41 and the volume down touch key body 42.

In a specific example, as shown in fig. 1, the touch key body 40 is located in a propagation path of the detection signal. When the touch key body 40 is not pressed, the degree of deformation of the touch key body 40 is almost 0, and a feedback signal is hardly generated at the touch key body 40, and the magnetostrictive body 20 receives a feedback signal formed by reflection from the boundary of the transmission medium.

As shown in fig. 2, when the touch key body 40 is pressed, the detection signal may generate signal fluctuation due to the pressing, and a feedback signal is generated. Generally, the larger the pressing force, the larger the degree of deformation of the touch key body 40. The touch key body 40 is deformed to a different degree, and the signal parameters of the feedback signal are also different. The arrows on the coil 30 in fig. 1 and 2 indicate the alternating magnetic field direction. The waveform pattern 60 represents the transmitted detection signal. The solid arrows near the waveform pattern 60 indicate the transmission direction of the detection signal. The dashed arrow indicates the transmission direction of the feedback signal.

Accordingly, the present disclosure utilizes the magnetostrictive effect to generate a detection signal by the magnetostrictive body under the action of the alternating magnetic field generated by the coil. The touch key forms a feedback signal based on the detection signal. The touch key body has different deformation degrees when being touched or not touched. Different deformation degrees further form different feedback signals, whether the touch key body is touched can be determined according to the detection signals and the different feedback signals, and the key function is achieved. The utility model provides a new button module has richened the button kind, has improved user experience.

In other alternative embodiments, the magnetostrictive body 20 comprises:

an emitter for generating the detection signal;

the receiving body is arranged in parallel with the emitting body and is used for receiving the feedback signal;

the coil includes:

an excitation coil wound on the emitter for generating an alternating magnetic field;

and the receiving coil is wound on the receiving body and is used for generating a feedback electric signal according to the feedback signal.

In the disclosed embodiment, the emitter and the exciting coil together form a sending component of the detection signal, and the receiver and the receiving coil form a receiving component of the receiving feedback signal. The electrical signal in the excitation coil is converted to an analog signal by the emitter. Likewise, the receiver converts the analog signal into a feedback electrical signal of the receiver coil. Here, the electrical signal may be an electrical signal such as a current or a voltage. The analog signal may be an elastic wave signal such as an ultrasonic guided wave.

In a specific example, as shown in fig. 1-6, the emitter and receiver may be integrally formed to form a unitary member. At this time, the exciting coil and the receiving coil may be wound on one integrated magnetostrictive body 20.

Or, in other alternative embodiments, the emitter and receiver are separately disposed;

the touch key body 40 is located between the emitter body and the receiver body.

When the emitter and the receiver are separately arranged, the exciting coil and the receiving coil are separately arranged correspondingly. In order to improve the accuracy and sensitivity of detection, the emitters, the touch key body 40, and the receivers are distributed along the same straight line.

In other optional embodiments, the transmission parameters include: the emission time of the detection signal; the receiving parameters comprise: a time of receipt of the feedback signal; the transmission time and the reception time are used for determining the position of the touch operation acting on the touch key body 40;

alternatively, the first and second liquid crystal display panels may be,

the transmission parameters include: a transmit phase of the detection signal; the receiving parameters comprise: a receive phase of the feedback signal; the transmitting phase and the receiving phase are used for determining the position of the touch operation acting on the touch key body 40.

In a specific application, the position of the touch key body may be determined according to a difference between the transmission time and the reception time. Generally, the larger the difference between the transmission time and the reception time, the farther the touch key body is from the position from which the detection signal is emitted. On the contrary, the larger the difference between the transmission time and the reception time is, the closer the touch key body is to the transmission position of the detection signal. Likewise, the position of the touch key body can also be determined using the difference between the transmission phase of the detection signal and the reception phase of the feedback signal.

In other optional embodiments, the transmitting signal further comprises: the emission amplitude of the detection signal; the receiving parameters include:

a received amplitude of the feedback signal;

wherein, the transmitting amplitude and the receiving amplitude are used for determining the pressing force degree applied to the touch key body 40.

In practical applications, the larger the received amplitude of the feedback signal is, the larger the force value indicating the acting force received by the touch key body 40 is, the larger the pressing force is, and the larger the degree of deformation received by the touch key body 40 is. Conversely, the smaller the reception amplitude of the feedback signal, the smaller the force value indicating the acting force received by the touch key body 40, the smaller the pressing force degree, and the smaller the degree of deformation received by the touch key body 40.

In other optional embodiments, the key module further includes:

the operation module is connected with the ultrasonic guided wave transceiver;

and the operation module is used for determining the position of the touch key body 40 according to the signal parameters.

In the embodiment of the disclosure, the operation module may determine a distance between a return position of the feedback signal and a sending position of the detection signal according to a difference between the sending time of the detection signal and the receiving time of the feedback signal, obtain the return position of the feedback signal, and further determine the position of the touch key body.

Or the operation module can determine the distance between the return position of the feedback signal and the sending position of the detection signal according to the difference value of the transmitting phase of the detection signal and the receiving phase of the feedback signal, so as to obtain the return position of the feedback signal and further determine the position of the touch key body.

In some embodiments, the key module further comprises: the input end of the signal amplifier is connected with the coil, the output end of the signal amplifier is connected with the input end of the filter, and the output end of the filter is connected with the operation module. The feedback electric signal generated by the coil is amplified by the signal amplifier, and is transmitted to the operation module after the unnecessary signal is filtered by the filter. The amplifier and the filter can effectively improve the accuracy of the operation result of the operation module and improve the accuracy of the touch operation detection of the touch key body.

It is understood that the feedback electrical signal refers to an electrical signal corresponding to the feedback signal received by the magnetostrictive body.

An embodiment of the present disclosure further provides an electronic device, including: the key module according to any of the above embodiments.

Electronic devices include, but are not limited to: a mobile phone, a tablet computer, a notebook, a television, or a wearable device, etc.

In other optional embodiments, the electronic device further comprises:

a middle frame 10;

the portion of the middle frame 10 is reused as the touch key body 40 of the key module.

In order to ensure the integrity of the electronic equipment, manufacturers of the electronic equipment can reduce the number of the holes formed in the mobile phone without losing the power, and the reduction of the holes formed by combining the earphone hole, the charging hole and the loudspeaker hole is one of the pursuits of the electronic equipment. However, mechanical keys currently require openings that affect the integrity of the electronic device.

In the embodiment of the disclosure, the shell of the terminal comprises the middle frame, the middle frame is reused as the touch key body, holes do not need to be formed, the number of the openings in the electronic equipment is reduced, and the integrity of the electronic equipment is improved.

The coil and the magnetostrictive body may be located in other areas of the middle frame than the touch key body.

In other alternative embodiments, the middle frame 10 includes:

a base plate 11;

a frame 12 located at an edge of the base plate 11;

the part of the frame 12 is reused as the touch key body 40 of the key module.

As shown in fig. 1 to 6, in an electronic device such as a mobile phone, a middle frame 10 of the mobile phone is substantially rectangular, and a side frame 12 is located at a peripheral edge of a bottom plate 11. The touch key body 40 is located on the frame 12 to be more suitable for the usage habit.

The coil and the magnetostrictive body may be located in other areas of the bezel than the touch key body.

In some embodiments, the touch key body 40 and the magnetostrictive body 20 are located on the same side wall of the bezel 12. At this time, the sidewall formed with the touch key body 40 may serve as a waveguide for serving as a medium through which the detection signal and the feedback signal propagate.

In other optional embodiments, the middle frame 10 further includes:

the blocking wall 13 is located between the frame 12 and the central position of the bottom plate 11, and forms an accommodating space 14 together with the frame 12, and the accommodating space 14 accommodates the ultrasonic guided wave transceiver.

As shown in fig. 2 to 5, the accommodating space 14 formed by the blocking wall 13 and the frame 12 is beneficial to improving the protection effect on the ultrasonic guided wave transceiver, and reduces the interference of other components such as a circuit board in the terminal to the ultrasonic guided wave transceiver.

In other optional embodiments, the electronic device further includes:

a coupling agent 70 for bonding the frame 12 and the magnetostrictive body 20 wound with a coil.

As shown in fig. 6, the coil is wound around the magnetostrictive body 20, and the coupling agent 70 is located between the coil and the frame 12, and plays a role in fixing the magnetostrictive body 20 and the frame 12.

The coupling agent may be an adhesive layer formed by curing an adhesive or a double-sided tape.

In a specific example, as shown in fig. 1 to 6, the electronic device is a mobile phone. The button module includes: the magnetic induced shrinkage or elongation device comprises a magnetostriction body 20 made of an iron-cobalt alloy material with a high magnetostriction coefficient, a spiral coil 30, a filter module, a signal amplifier, an operation module and the like. The spiral coil 30 is wound on the surface of the magnetostrictive body 20 to form an ultrasonic guided wave generating device, and is attached to the button area 40 of the mobile phone case. The principle of operation is generally that an alternating current is passed through the helical coil 30 by an ac exciter, and the helical alternating current generates an alternating magnetic field, as indicated by the double-headed arrows on the coil 30 in fig. 1. Due to the material properties of the magnetostrictive body 20 with a high magnetostriction coefficient, an alternating magnetic field inside the magnetostrictive body 20 will cause a change in the geometric dimension of the magnetostrictive body 20 in the direction of the magnetic field, which changes in elongation and contraction; when the magnetic field change frequency reaches a certain fast degree, the fast change of the dimension of the magnetostrictive body 20 generates micro-vibration, i.e. ultrasonic guided waves are generated. Because the magnetostrictive body 20 is attached to the chassis frame, the ultrasonic guided waves are transmitted to the frame 12 at the same time, as shown in fig. 1 No. 4, where the solid line arrow in the frame 12 indicates the propagation direction of the ultrasonic guided waves, and the dotted line arrow indicates the propagation direction of the guided waves reflected by the end of the frame. The ultrasonic guided wave reflected wave can be sensed by the magnetostrictive body 20, and according to the inverse magnetostrictive effect (the inside of the magnetostrictive material can generate an alternating magnetic field due to the change of the geometric dimension), the change of the magnetic field causes the change of the electric field in the spiral coil, and the reflected ultrasonic guided wave can generate the change of the signal to be identified. When the finger 50 presses the corresponding position of the frame 12, the ultrasonic guided wave propagating in the frame 12 generates signal fluctuation due to the pressing of the finger and generates a reflected wave, and the reflected wave is received and passes through a signal amplifier, a filter, an operation module and the like, and the pressing position of the finger is calculated according to the time difference or the phase difference between the transmitted signal and the received signal, so that the corresponding function key is identified. In addition, the intensity of the amplitude of the reflected wave signal can be influenced by the pressing force of the finger, so that the pressing force can be judged by the key module according to the pressing position, and the position sensing and the pressure sensing are realized.

The embodiment of the present disclosure further provides a method for identifying a key operation, which is used for the key module according to any of the embodiments, and the method includes:

transmitting a detection signal and recording the transmission parameter of the detection signal;

detecting a feedback signal returned based on the detection signal to obtain a receiving parameter of the feedback signal;

and determining the operation parameters of the touch key body subjected to touch operation according to the transmitting parameters and the receiving parameters.

In some embodiments, the identification method further comprises:

acquiring detection parameters of the detection signals;

the determining that the touch key body is subjected to touch operation according to different signal parameters received at different moments comprises:

determining the position of the touch key body according to the receiving time of the feedback signal and the transmitting time of the detection signal; or the like, or a combination thereof,

and determining the position of the touch key body according to the phase of the feedback signal and the phase of the detection signal.

In some embodiments, the determining that the touch key body is subjected to a touch operation according to different signal parameters received at different time includes:

and determining the force value of the acting force applied to the touch key body according to the amplitude of the feedback signal.

Referring to fig. 7, the key-operated identification apparatus 800 may include one or more of the following components: processing component 802, memory 804, power component 806, multimedia component 808, audio component 810, input/output (I/O) interface 812, sensor component 814, and communication component 816.

The processing component 802 generally controls overall operation of the device 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.

The memory 804 is configured to store various types of data to support operations at the apparatus 800. Examples of such data include instructions for any application or method operating on device 800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

Power components 806 provide power to the various components of device 800. The power components 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the apparatus 800.

The multimedia component 808 includes a screen that provides an output interface between the device 800 and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the device 800 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the apparatus 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor assembly 814 includes one or more sensors for providing various aspects of state assessment for the device 800. For example, the sensor assembly 814 may detect the open/closed status of the device 800, the relative positioning of components, such as a display and keypad of the device 800, the sensor assembly 814 may also detect a change in the position of the device 800 or a component of the device 800, the presence or absence of user contact with the device 800, the orientation or acceleration/deceleration of the device 800, and a change in the temperature of the device 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 816 is configured to facilitate communications between the apparatus 800 and other devices in a wired or wireless manner. The device 800 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the apparatus 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic components for performing the above-described methods.

In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 804 comprising instructions, executable by the processor 820 of the device 800 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

The methods disclosed in the several method embodiments provided in this disclosure may be combined arbitrarily without conflict to arrive at new method embodiments.

The features disclosed in the several product embodiments provided in this disclosure may be combined in any combination to yield new product embodiments without conflict.

The features disclosed in the several method or product embodiments provided in this disclosure may be combined in any combination to yield new method embodiments or device embodiments without conflict.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (15)

1. A key module, comprising:

the ultrasonic guided wave transceiver is used for generating an ultrasonic guided wave detection signal and detecting a feedback signal returned based on the detection signal;

a touch key body positioned at one side of the terminal housing for detecting the signal transmission direction; the touch key body is used for generating a feedback signal based on the detection signal, wherein the deformation degree of the touch key body is different, and the signal parameters of the feedback signal are different; and the transmitting parameter of the detection signal and the receiving parameter of the feedback signal are used for determining the operation parameter of the touch operation acting on the touch key body.

2. The key module of claim 1, wherein the guided ultrasound wave transceiver comprises:

a coil;

the magnetostrictive body is wound by the coil and used for generating a detection signal under the action of an alternating magnetic field generated by the current change in the coil and detecting a feedback signal returned based on the detection signal;

the touch key body is arranged on one side of the mobile terminal shell along the transmission direction of the ultrasonic guided wave and is arranged at an interval with the magnetostrictive body.

3. The key module of claim 2, wherein the magnetostrictive body comprises:

an emitter for generating the detection signal;

the receiving body is arranged in parallel with the emitting body and used for receiving the feedback signal;

the coil includes:

an excitation coil wound on the emitter for generating an alternating magnetic field;

and the receiving coil is wound on the receiving body and is used for generating a feedback electric signal according to the feedback signal.

4. The key module of claim 3,

the emitter and the receiver are separately arranged;

the touch key body is located between the emitter body and the receiver body.

5. The key module of claim 1, wherein the transmission parameters comprise: the emission time of the detection signal; the receiving parameters comprise: a time of receipt of the feedback signal; the transmitting time and the receiving time are used for determining the position of the touch operation acting on the touch key body;

alternatively, the first and second electrodes may be,

the transmission parameters include: a transmit phase of the detection signal; the receiving parameters comprise: a receive phase of the feedback signal; the transmitting phase and the receiving phase are used for determining the position of the touch operation acting on the touch key body.

6. The key module of claim 5, wherein the transmission signal further comprises: the emission amplitude of the detection signal; the receiving parameters include:

a received amplitude of the feedback signal;

the transmitting amplitude and the receiving amplitude are used for determining the pressing force degree applied to the touch key body.

7. The key module of claim 6, wherein the key module further comprises:

the operation module is connected with the ultrasonic guided wave transceiver;

and the operation module is used for determining the position of the touch key body according to the signal parameters.

8. An electronic device, comprising:

the key module of any of claims 1-7.

9. The electronic device of claim 8, further comprising:

a middle frame;

and the part of the middle frame is reused as the touch key body of the key module.

10. The electronic device of claim 9, wherein the middle frame comprises:

a base plate;

the frame is positioned at the edge of the bottom plate;

and the part of the frame is reused as the touch key body of the key module.

11. The electronic device of claim 10, wherein the middle frame further comprises:

and the retaining wall is positioned between the frame and the central position of the bottom plate and forms an accommodating space together with the frame, and the accommodating space accommodates the ultrasonic guided wave transceiver.

12. The electronic device of claim 10, further comprising:

a coupling agent for bonding the frame and the magnetostrictor wound with a coil.

13. A method for identifying key operation, which is used for the key module set of any one of claims 1 to 7, and comprises:

transmitting a detection signal, and recording the transmission parameter of the detection signal;

detecting a feedback signal returned based on the detection signal to obtain a receiving parameter of the feedback signal;

and determining the operation parameters of the touch key body subjected to touch operation according to the transmitting parameters and the receiving parameters.

14. The identification method according to claim 13, further comprising:

acquiring detection parameters of the detection signals;

the determining that the touch key body is subjected to touch operation according to the difference of the signal parameters received at different moments comprises:

determining the position of the touch key body according to the receiving time of the feedback signal and the transmitting time of the detection signal; or the like, or, alternatively,

and determining the position of the touch key body according to the phase of the feedback signal and the phase of the detection signal.

15. The identification method according to claim 13 or 14, wherein the determining that the touch key body is subjected to the touch operation according to the difference of the signal parameters received at different time includes:

and determining the force value of the acting force applied to the touch key body according to the amplitude of the feedback signal.

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