CN213209133U

CN213209133U - Electronic device

Info

Publication number: CN213209133U
Application number: CN202022458083.2U
Authority: CN
Inventors: 韩家斌
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-05-14
Anticipated expiration: 2030-10-29

Abstract

The application discloses electronic equipment relates to electronic equipment technical field, includes: the middle frame and at least one group of induction components; a key area is arranged on the first surface of the middle frame; the sensing assembly includes: the pressure sensor, the ultrasonic transmitter and the ultrasonic receiver are all arranged on the second surface and are opposite to the key area, the ultrasonic transmitter is used for transmitting an initial ultrasonic signal, the ultrasonic receiver is used for receiving a reflected ultrasonic signal of the initial ultrasonic signal reflected back through the key area, and the pressure sensor is used for detecting the pressing operation in the key area and generating a corresponding pressure electric signal; and under the condition that the pressure electric signal is matched with the preset pressure threshold value and the reflected ultrasonic signal is matched with the preset ultrasonic threshold value, enabling the function corresponding to the key area. The electronic equipment of the embodiment of the application can effectively improve the recognition precision of pressing the power keypad or the volume keypad by the fingers.

Description

Electronic device

Technical Field

The application belongs to the technical field of electronic equipment, and particularly relates to electronic equipment.

Background

With the rapid development of the electronic industry, electronic devices are also more and more intelligent. For example, power key or volume key functions on an electronic device are implemented using an ultrasonic sensor instead of conventional mechanical keys.

In practical application, because the ultrasonic waves encounter impurities or interfaces in the transmission process and are reflected to form reflected echoes, the reflected ultrasonic waves have different intensities due to different acoustic resistance characteristics of different media, and therefore, the functions of a power key or a volume key can be realized by utilizing the ultrasonic sensor. For example, when the power key function is realized by using the ultrasonic sensor, when a finger presses the power key area on the middle frame, the ultrasonic waves encounter a contact interface between the middle frame and the finger, a part of the ultrasonic waves are transmitted out through the finger, and the reflected ultrasonic waves are less and have weaker intensity; when the power key area on the middle frame is pressed by a finger, the ultrasonic waves meet the interface between the middle frame and the air of the electronic equipment, most of the ultrasonic waves are reflected, and the reflected ultrasonic waves are more and have stronger strength. Therefore, whether a finger presses the power key area on the middle frame or not can be judged by using the ultrasonic sensor, and the power key function can be realized by using the ultrasonic sensor.

However, the ultrasonic wave is related not only to the acoustic resistance of the medium on the middle frame but also to the roughness of the finger and the degree of pressing force. On one hand, when the finger is rough or the pressing force is small, the pressing of the power key or the volume key cannot be accurately identified; on the other hand, since the difference between the acoustic resistance characteristic of water and the human hand is small, water drops are easily misjudged as fingers, and thus the power key or the volume key is mistriggered. That is to say, in the prior art, when the ultrasonic sensor is used to realize the power key or volume key function of the electronic device, the recognition accuracy is low, and the electronic device is easily triggered by mistake.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application aims to provide electronic equipment, and the problems that when an ultrasonic sensor is used for realizing the functions of a power key or a volume key of the electronic equipment, the identification precision is low and the electronic equipment is easily triggered by mistake can be solved.

In order to solve the technical problem, the present application is implemented as follows:

an embodiment of the present application provides an electronic device, which includes: the middle frame and at least one group of induction components;

the middle frame is provided with a first surface and a second surface which are opposite, and a key area is arranged on the first surface;

the sensing assembly includes: the pressure sensor, the ultrasonic transmitter and the ultrasonic receiver are all attached to the second surface and are opposite to the key area, the ultrasonic transmitter is used for transmitting an initial ultrasonic signal, the ultrasonic receiver is used for receiving a reflected ultrasonic signal of the initial ultrasonic signal reflected back through the key area, and the pressure sensor is used for detecting the pressing operation in the key area and generating a corresponding pressure electric signal;

and enabling the function corresponding to the key area under the condition that the pressure electric signal exceeds a preset pressure threshold value and the reflected ultrasonic wave signal exceeds a preset ultrasonic wave threshold value.

In this application embodiment, the button district can be set up to power keypad or volume keypad, because pressure sensor, ultrasonic emitter ultrasonic receiver all attaches in on the second surface and with it is relative to press the button district, consequently, in practical application, the finger is in when pressing down or sliding according to the button district, the initial ultrasonic wave signal that ultrasonic emitter sent meets the contact interface of midframe and finger and is reflected, and the reflection ultrasonic wave signal of formation is received by ultrasonic receiver, just so, just can pass through whether there is the finger to press down or slide according to the button district through reflection ultrasonic wave signal judgement. Moreover, the pressure sensor can detect the pressing operation in the key area and generate a corresponding pressure electric signal, so that the degree of pressing force of the finger in the key area can be checked through the pressure sensor. In the embodiment of the application, through ultrasonic sensor (supersound receiver and ultrasonic transmitter) with pressure sensor combines together the pressure electricity signal matches with predetermineeing the pressure threshold value, and under reflection ultrasonic signal and the condition of predetermineeing the ultrasonic threshold value and matching, the function that corresponds according to the button district is enabled, can effectively promote the finger and press the discernment precision of power keypad or volume keypad, avoids according to the function of button district by the spurious triggering.

Drawings

FIG. 1 is a partially schematic illustration of an electronic device according to an embodiment of the disclosure;

FIG. 2 is a schematic diagram of the principle of ultrasonic reflection of the electronic device of FIG. 1;

fig. 3 is a second partial schematic diagram of an electronic device according to an embodiment of the invention;

fig. 4 is one of schematic diagrams of a key area of an electronic device according to an embodiment of the present application;

fig. 5 is a second schematic diagram of a key area of an electronic device according to an embodiment of the present application;

FIG. 6 is one of the ultrasonic principle schematic diagrams of the electronic device of FIG. 3;

FIG. 7 is a second schematic ultrasonic illustration of the electronic device of FIG. 3;

fig. 8 is a third partial schematic view of an electronic device according to an embodiment of the present application.

Description of reference numerals:

10: a middle frame; 20: an inductive component; 101: a first surface; 102: a second surface; 201: an ultrasonic transmitter; 202: an ultrasonic receiver; 203: a pressure sensor; 30: a support; 301: accommodating grooves; 40: an acoustic wave barrier; 11: a key area; 50: a flexible circuit board; 60: a coupling agent.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The electronic device provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.

The electronic device according to the embodiment of the application can be a smart phone, a computer, a multimedia player, an electronic reader, a wearable device and the like.

Referring to fig. 1, a partial schematic view of an electronic device according to an embodiment of the present application is shown. As shown in fig. 1, the electronic device may specifically include: a middle frame 10, and at least one group of sensing components 20; the middle frame 10 has a first surface 101 and a second surface 102 opposite to each other, and the first surface 101 is provided with a key area 11; the sensing assembly 20 includes: the button switch comprises an ultrasonic transmitter 201, an ultrasonic receiver 202 and a pressure sensor 203, wherein the pressure sensor 203, the ultrasonic transmitter 201 and the ultrasonic receiver 202 are all arranged on the second surface 102 and are opposite to the button area 11, the ultrasonic transmitter 201 is used for transmitting an initial ultrasonic signal, the ultrasonic receiver 202 is used for receiving a reflected ultrasonic signal of the initial ultrasonic signal reflected by the button area 11, and the pressure sensor 203 is used for detecting the pressing operation in the button area 11 and generating a corresponding pressure electric signal; under the condition that the pressure electric signal is matched with a preset pressure threshold value and the reflected ultrasonic signal is matched with a preset ultrasonic threshold value, the function corresponding to the key area 11 is enabled.

In practical applications, the ultrasonic transmitter 201 may be a transducer (piezoelectric ceramic/piezoelectric wafer or invar, etc.) adhered to the second surface 102 of the middle frame 10 through a coupling agent 60, and the coupling agent 60 may be glue or other adhesive matching the acoustic impedance. Similarly, the ultrasonic receiver 202 may also be a piezoelectric ceramic/piezoelectric wafer or a ni-fe-al alloy, and is adhered to the second surface 102 of the middle frame 10 by the coupling agent 60. It is understood that the ultrasonic transmitter 201 of the embodiment of the present application may also be referred to as a transmitting sensor or a wave transmitter, and the ultrasonic receiver 202 may also be referred to as a receiving sensor or a wave receiver. In the embodiment of the present application, the ultrasonic transmitter 201 and the ultrasonic receiver 202 may be collectively referred to as an ultrasonic sensor.

In the embodiment of the present application, the middle frame 10 may be a middle frame 10 of a mobile terminal (mobile phone), or may be a component support 30 of a mobile terminal or an internal device of other electronic equipment. The embodiment of the present application is explained by taking the middle frame 10 of the mobile terminal as an example, and other references may be made.

In practical applications, the first surface 101 of the middle frame 10 is generally the outer side of the middle frame 10 that is in direct contact with the finger of the user, and the second surface 102 of the middle frame 10 is generally the inner side of the middle frame 10 or the inner side of the housing of the electronic device.

In the embodiment of the present application, the key area 11 may be a slide key area and/or a click key area. The sliding key area realizes the function corresponding to the key area 11 through sliding, and the clicking key area realizes the function corresponding to the key area 11 through pressing or point touching. For example, the function of the camera of the electronic equipment is switched on and off through sliding of the key area 11, so that the switching of the camera is more convenient. Or, the volume key is increased or decreased by touching or pressing the key area 11 for multiple times, so that the requirement of the user on the accuracy of the volume is met. Of course, the button area 11 may also be a combination of a slide button area and a click button area, so that the buttons are more suitable for the habit of the user. For example, the volume is increased or decreased by sliding the key section 11, and the power key is turned on or off by touching. The implementation manner of the key region 11 can be selected by those skilled in the art according to practical situations, and the embodiment of the present application is not limited in this respect.

Referring to fig. 2, a schematic diagram of the principle of ultrasonic reflection of the electronic device of fig. 1 is shown. As shown in fig. 2, when a finger presses the key region 11, the ultrasonic transmitter 201 transmits an initial ultrasonic signal, a part of the initial ultrasonic signal passes through a contact interface between the middle frame 10 and the finger, and another part of the initial ultrasonic signal is reflected back to form a reflected ultrasonic signal, and the ultrasonic receiver 202 receives the reflected ultrasonic signal, and compares the intensity of the reflected ultrasonic signal with a preset ultrasonic threshold value to determine whether the finger presses or slides on the key region 11. Meanwhile, in order to avoid the situation that the key area 11 is touched by mistake due to water or pressing force and finger roughness, the pressing operation of the finger on the key area 11 is detected through the pressure sensor 203, different pressure electric signals are generated according to different pressing force degrees, and the pressure electric signals are matched with a preset pressure threshold value, so that the problem that the key area 11 is triggered by mistake can be avoided. Therefore, in the embodiment of the present application, by combining the ultrasonic sensor (the ultrasonic receiver 202 and the ultrasonic transmitter 201) with the pressure sensor 203, under the condition that the pressure electrical signal matches the preset pressure threshold and the reflected ultrasonic signal matches the preset ultrasonic threshold, the function corresponding to the key zone 11 is enabled, the recognition accuracy of pressing the power keypad or the volume keypad by the finger can be effectively improved, and the function of pressing the key zone 11 is prevented from being triggered by mistake.

In this application embodiment, when realizing functions such as power key, volume + or volume-through the mode that supersound and pressure combined together, owing to need not trompil on center 10 for electronic equipment's waterproof performance is better, and the outward appearance is more exquisite, and the science and technology sense is also stronger. Moreover, because the power key, the volume key and the like of the electronic equipment do not need to realize corresponding functions through mechanical keys, the assembly procedures of the electronic equipment can be effectively reduced, the assembly precision is lower, and the assembly cost can be effectively reduced.

In the embodiment of the present application, the reflected ultrasonic signal may be the intensity of the reflected ultrasonic wave. For example, the minimum preset ultrasonic threshold is less than or equal to the reflected ultrasonic intensity is less than or equal to the maximum preset ultrasonic threshold, and whether the acoustic resistance of the medium for pressing, touching or sliding the key area 11 is the same as the acoustic resistance of a human finger can be quickly determined according to the ultrasonic intensity, so as to quickly determine whether a finger is pressed on the key area 11. Similarly, in the embodiment of the present application, the pressure electrical signal may be the intensity of the pressing or the strength of the pressing. For example, the minimum preset pressure value is less than or equal to the current pressure value and less than or equal to the maximum preset pressure value, and the current pressure value is detected by the pressure sensor 203, so as to quickly determine whether the current pressure value is within the preset pressure threshold range. In practical applications, when the other medium is triggered by mistake, the pressing force on the key area 11 is either smaller or larger, for example, when water drops are in the key area 11, the pressing force on the key area 11 is smaller due to the smaller self weight of the water drops, so that the pressure sensor 203 can avoid the water from being triggered by mistake. In the embodiment of the application, through the dual mode of judging of pressure + sound wave to can promote the press precision of button district 11, avoid the problem of spurious triggering very effectively.

Optionally, the pressure sensor 203 is disposed between the ultrasonic transmitter 201 and the ultrasonic receiver 202.

In the embodiment of the present application, the pressure sensor 203 may be disposed between the ultrasonic transmitter 201 and the ultrasonic receiver 202, so that the detection precision of the whole key area 11 is relatively uniform, and the detection effect is better. For example, in practical applications, the pressure sensor 203 may be disposed at a central position of the key area 11, the ultrasonic transmitter 201 and the ultrasonic receiver 202 are disposed at two sides of the pressure sensor 203, and the distances are equal, so that once a finger presses the key area 11, the pressure sensor 203 can quickly detect the pressure, an initial ultrasonic signal transmitted by the ultrasonic transmitter 201 can be quickly reflected by a contact interface between the middle frame 10 and the finger, a reflected ultrasonic signal that is reflected back can be received by the ultrasonic receiver 202, and then is quickly compared with a preset ultrasonic threshold, and finally, by a combination of pressure and ultrasound, high-precision detection on the key area 11 is achieved.

Optionally, the key area 11 includes at least one functional area, and each functional area is correspondingly provided with at least one group of sensing assemblies 20.

Referring to fig. 3, a schematic diagram of a key area 11 of an electronic device according to an embodiment of the present application is shown. As shown in fig. 3, the key area 11 includes a plurality of functional areas, and each functional area is provided with a set of sensing elements 20. In the embodiment of the present application, a set of sensing elements 20 is provided for each functional area, which is to be understood as a set of sensing elements 20 provided at the corresponding position of the functional area, but is limited to only the set of sensing elements 20 serving the corresponding functional area.

In this embodiment, the functional area may include: at least one of a power key function region, a volume up function region, or a volume down function region. When the number of the function areas is 3, the key area 11 may include three function areas, namely, a power key function area, a volume up function area, and a volume down function area, which may be arranged in any manner on the middle frame 10. Referring to fig. 4 and 5, schematic layout diagrams of the key region 11 of the electronic device according to the embodiment of the present application are shown. As shown in fig. 4, the power key function region may be disposed between the volume up function region and the volume down function region, or, as shown in fig. 5, the volume up function region, the volume down function region, and the power key function region are sequentially arranged from left to right on the middle frame 10 of the electronic device.

Of course, it is understood that the functional region may further include: the camera quickly opens the functional area, the bright screen functional area and the like, a person skilled in the art can set the corresponding functions of the functional area according to actual requirements, and the embodiment of the application is explained by taking the power key functional area, the volume adding functional area and the volume reducing functional area as examples.

In the embodiment of the present application, when the key area 11 includes three function areas, namely, a power key function area, a volume increasing function area and a volume decreasing function area, the length L of the entire key area 11 may be controlled within 40mm, the distance L1 between the ultrasonic transmitter TX1 and the ultrasonic receiver RX1 may be 7.8mm, and the sizes of the ultrasonic transmitter 201 and the ultrasonic receiver 202 may be 2.5mm (length) × 0.5mm (width) of the piezoelectric wafer. In the embodiment of the present application, the size of the ultrasonic sensor may be smaller, and therefore, each functional area in the key area 11 may be set to be more compact, and the length of the whole key area 11 may also be shorter.

In some embodiments, when each functional area corresponds to one group of sensing elements 20, the functions of each group of sensing elements 20 may be as follows: the effect of the pressure sensor 203 that every functional area corresponds can be for the pressing operation that the response corresponds the functional area, the ultrasonic transmitter 201 that every functional area corresponds is used for sending initial ultrasonic signal, the ultrasonic receiver 202 that every functional area corresponds is used for receiving the reflection ultrasonic signal that the functional area that corresponds reflects back, when pressure sensor 203 detects the pressing operation that corresponds the functional area and the pressure signal of production is in presetting pressure threshold value scope, and the ultrasonic wave intensity that the reflection ultrasonic signal reacted is in presetting ultrasonic threshold value scope, then the function that the functional area corresponds is enabled, like this, because every functional area corresponds a set of response subassembly 20, consequently, can effectively promote the detection precision that corresponds the functional area.

In the embodiment of the application, the function corresponding to the functional area can be realized by clicking. For example, when the functional area is "volume +", if the pressing force on the middle frame 10 corresponding to "volume +", is greater than or equal to the lowest preset pressure threshold and less than or equal to the highest pressure threshold, and the reflected ultrasonic signal received by the ultrasonic receiver 202 is greater than or equal to the lowest preset ultrasonic threshold, and is less than or equal to the highest preset ultrasonic threshold, the volume is increased according to the preset frequency, and stabilizes at the current volume value until pressing is stopped. In the embodiment of the present application, because each functional area corresponds to a set of sensing assemblies 20, therefore, the intensity of the ultrasonic wave emitted by the ultrasonic emitter 201 can also be set according to the functional areas, the preset ultrasonic threshold range of each functional area is set according to the performance of each functional area, and the preset pressure threshold is set, so as to achieve the beneficial effects of allocating resources as required and avoiding resource waste.

In other embodiments of the present application, the function of the corresponding function area may also be implemented by a sliding pressing manner. Each ultrasonic receiver 202 can receive the reflected ultrasonic signals of the initial ultrasonic signals emitted from different ultrasonic emitters 201 reflected by the middle frame 10 and the finger pressing interface, so that the whole key area 11 can realize the detection of the touch position of the finger and realize the sliding adjustment function. For example, when the "volume +" function is realized by sliding, when the finger is slid to the "volume +" function region, the ultrasonic receiver RX2 corresponding to the "volume +" function region may receive the reflected ultrasonic signals after the initial ultrasonic signals emitted by different ultrasonic transmitters 201 are reflected by the middle frame 10 at the "volume +" current position and the finger interface, the initial ultrasonic signals emitted by the ultrasonic transmitters TX1 and TX2 may be reflected by the middle frame 10 at the finger-pressed position to form reflected ultrasonic signals (indicated by solid lines and broken lines in fig. 3), the reflected ultrasonic signals may be received by the ultrasonic receiver RX2 at the "volume +" corresponding position, because the distance of the initial ultrasonic signals emitted by the ultrasonic transmitters TX1 is longer than the distance of the initial ultrasonic signals emitted by the ultrasonic transmitters TX2, the formed reflected ultrasonic signals are received by the ultrasonic receiver 202 at the "volume +" corresponding position for different time, the time difference of the received reflected ultrasonic signals formed by the initial ultrasonic signals transmitted by different ultrasonic transmitters 201 can be converted into distance information according to a corresponding algorithm, and then the pressing position information of the current finger can be obtained, so that the positioning detection of the pressing position of the finger can be realized through ultrasonic waves, or the detection of the sliding position of the finger can be realized. Similarly, the pressure sensor 203 corresponding to the "volume +" function region can realize the detection of the pressure degree of the finger in the region, so that the "volume +" function is prevented from being triggered by mistake due to the mistaken touch of water drops and the like.

In other embodiments of the present application, the pressure sensor 203, the ultrasonic transmitter 201, and the ultrasonic receiver 202 corresponding to the current functional area may be further activated according to a pressing or sliding operation of a user on the corresponding functional area, and when the pressing operation is not detected, the corresponding pressure sensor 203, the corresponding ultrasonic transmitter 201, and the corresponding ultrasonic receiver 202 are in a sleep state, so as to further achieve the beneficial effect of energy saving.

In the embodiment of the present application, each of the ultrasonic transmitter 201, the ultrasonic receiver 202, and the pressure sensor 203 may be connected to the main board of the electronic device through the flexible circuit board 50, so that the maintenance convenience of the electronic device may be effectively improved. In practical application, once one part of the electronic equipment fails, the electronic equipment can be independently replaced, so that the maintenance cost of the electronic equipment can be effectively reduced. Of course, each group of sensing assemblies 20 can be arranged on one circuit board and connected with the main board of the electronic device through a plurality of circuit boards, so that the sensing assemblies 20 can be assembled in advance in the assembling process, the assembling efficiency of the whole machine is improved, the sensing assemblies 20 can be directly replaced during maintenance and replacement, and the replacing efficiency is improved.

Optionally, the electronic device may further include: a bracket 30; the bracket 30 is arranged on one side of the second surface 102 of the middle frame 10, and the bracket 30 is provided with a receiving groove 301; the ultrasonic transmitter 201, the ultrasonic receiver 202 and the pressure sensor 203 are all disposed in the accommodating groove 301.

In the embodiment of the present application, in order to improve the stability of the ultrasonic transmitter 201, the ultrasonic receiver 202, and the pressure sensor 203 in the middle frame 10, the bracket 30 may be further disposed in the electronic device housing, and the sensor is disposed in the accommodating groove 301 on the bracket 30, so as to improve the connection reliability between the middle frame 10 and the sensor, and reduce the risk that the sensor falls off from the middle frame 10.

Optionally, the electronic device may further include: an acoustic wave barrier 40; the sound wave blocking piece 40 is laid at the bottom of the accommodating groove 301; the ultrasonic transmitter 201, the ultrasonic receiver 202, and the pressure sensor 203 are disposed on the acoustic barrier 40.

In this application embodiment, can also be through laying sound wave at holding tank 301 and separate hindering piece 40, all set up ultrasonic emitter 201, supersound receiver 202 and pressure sensor 203 on sound wave separates hindering piece 40 to avoid the sound wave to the inside transmission of electronic equipment, lead to the detection sensitivity and the precision reduction of functional area.

In practical application, the sound wave blocking member 40 can be laid in the accommodating groove 301 in a sticking manner through double-sided adhesive tape or glue, so that the connection reliability between the sound wave blocking member 40 and the accommodating groove 301 is effectively improved.

Optionally, in the case that there are a plurality of functional regions, the adjacent sensing assemblies 20 share one target ultrasonic device, and the target ultrasonic device is the ultrasonic transmitter 201 or the ultrasonic receiver 202.

Referring to fig. 6 and 7, schematic ultrasonic diagrams of another electronic device according to an embodiment of the present application are shown. Specifically, in the case where there are a plurality of functional regions, the adjacent sensing elements 20 share one ultrasonic transmitter 201 or ultrasonic receiver 202, the a1 functional region and the a2 functional region share one ultrasonic receiver 202, and the a2 functional region and the A3 functional region share one ultrasonic transmitter 201. In this way, the functional areas can be more compact, i.e. the length range corresponding to the key area 11 can be shorter. Moreover, since the number of the ultrasonic transmitters 201 and the ultrasonic receivers 202 can be smaller, the number of the ultrasonic receivers 202 and the ultrasonic transmitters 201 of the electronic device shown in fig. 6 and 7 can be reduced by one, compared with the electronic device shown in fig. 3, thereby reducing the cost of the electronic device.

In the embodiment of the present application, TX1-RX1-TX2 constitute one group of inductive elements 20, and RX1-TX2-RX2 constitute another group of inductive elements 20. In practical application, the pressing position of the finger is calculated by using the time difference information of the arrival of the ultrasonic signals transmitted by TX1 and TX2 at RX 1. Theoretically, the whole key area 11 can be realized by using the detection combination, but in an actual scene, the sound wave signal is attenuated quickly along with the distance, when a finger is pressed on the area A3 from the area A1, the energy of the sound wave emitted by TX1 reflected back to RX1 is low, so that the information is detected by using the positions of RX1-TX2-RX 2. When the finger is pressed to the a2 area, the information of the two detection groups can be used to comprehensively judge the position. Based on the above principle, the detection of the contact position of the finger, that is, the detection of the touch slide of the finger is realized.

In the embodiment of the present application, when a finger touches the middle frame 10, first, the ultrasonic transmitter 201 and the ultrasonic receiver 202 perform ultrasonic detection, so as to determine which functional area the position information is in according to the ultrasonic information, for example, the a1 functional area, and then the pressure sensor 203 provides information of the pressure dimension, a pressure trigger threshold F1 may be set on software of the electronic device, and when the pressure sensor 203 of the corresponding area detects that the pressure value reaches F1, the function corresponding to the a1 functional area is triggered, which is to prevent false triggering and at the same time, the information of the pressure dimension may ensure the experience consistency of the user, and the function corresponding to the functional area is not responded to by a slight touch.

In the embodiment of the present application, under the condition that no finger presses the key area 11, all the ultrasonic transmitters 201 and the ultrasonic receivers 202 are in the low-frequency and low-power scanning state (equivalent to the sleep state), the scanning frequency is less than or equal to 20Hz, and the transmission power is in the low gear. As shown in FIG. 6, when it is detected that a finger touches the TX1-RX1 interval position, the emission power and the scanning frequency of TX1 are increased, the scanning frequency is greater than or equal to 50Hz, the power is in a high gear, at this time, TX2 is adjusted to the middle gear power, the scanning frequency is the same as TX1, and RX2 enters a sleep state. At this time, whether the position touched by the finger and the pressing force information reach the state of triggering the key function is further judged. As shown in fig. 7, when a finger touches the zone position area of TX2-RX2, TX2 is increased from the low scan frequency to the normal scan frequency while the power is increased to the middle gear while the TX1 is asleep. At this time, whether the position touched by the finger and the pressing force information reach the state of the trigger button is further judged. Therefore, on one hand, the system power consumption of the whole machine can be reduced, on the other hand, the pressing position of the finger can be judged through ultrasonic waves, and then the pressing pressure degree is further combined, so that the touch of the key area 11 to the finger is more accurate and reliable.

Optionally, the target ultrasound device is equidistant from its two adjacent pressure sensors 203.

In this application embodiment, the whole ultrasonic transmitter 201, ultrasonic receiver 202 and pressure sensor 203 that press the key zone 11 can be evenly distributed in pressing the key zone 11, or, the central point that can set for every functional area is pressure sensor 203, ultrasonic transmitter 201 and ultrasonic receiver 202 are in pressure sensor 203 both sides evenly distributed, thus, the whole detection precision and the sensitivity that press the key zone 11 just can be comparatively even, no matter which region is pressed by the finger can all detect pressing fast accurately, and then judge whether the function that corresponds the functional area enables.

As shown in fig. 6 or fig. 7, the distance between the ultrasonic receiver RX1 shared by the a1 functional region and the a2 functional region and the pressure sensors 203 on the two adjacent sides thereof is equal, and the distance between the ultrasonic transmitter TX2 shared by the a2 functional region and the A3 functional region and the pressure sensors 203 on the two adjacent sides thereof is also equal, so that the problem of inaccurate detection of dead zones in the entire key region 11 (the region corresponding to the a1 functional region, the a2 functional region, and the A3 functional region) is avoided.

Optionally, at least one of the target ultrasound devices is not equidistant from two adjacent pressure sensors 203 on two sides of the target ultrasound device.

Referring to fig. 8, a partial structural schematic diagram of another electronic device according to an embodiment of the present application is shown. As shown in fig. 8, the distance between the ultrasonic receiver RX1 shared by the a1 functional region and the a2 functional region and the pressure sensor 203 of the a1 functional region is greater than the distance between the ultrasonic receiver RX1 and the pressure sensor 203 of the a2 functional region. That is, the distance between RX1-TX2-RX2 is shorter, so that the detection accuracy of the A2 functional area and the A3 functional area can be effectively improved. Specifically, when no finger is pressed, the TX1, the RX1, the TX2 and the RX2 are all in a low-frequency scanning state, and the scanning frequency is less than or equal to 20 Hz. When the A1 functional area detects finger touch, the power of TX1 and the scanning frequency of TX1 and RX1 are increased, the frequency of the scanning frequency is more than or equal to 50Hz, and the TX2 and the RX2 are in a sleep state. In the embodiment of the application, the A1 functional area can be set to only realize the key function, the TX1-RX1 ultrasonic detection combination is reserved as the false touch prevention judgment, and the function corresponding to the A1 functional area is triggered when the pressure reaches the trigger threshold. When the A2 functional area or the A3 functional area detects finger touch, the scanning frequency of RX1-TX2-RX2 is increased, the transmitting power of TX2 is increased, TX1 is in a sleep state at the moment, in order to guarantee detection of the sliding function, RX1-TX2-RX2 detects different receiving times of ultrasonic waves in combination, the touch position of the finger is identified, and then the degree of pressing is detected by combining the pressure sensor 203, so that the sliding pressing function of the A2 functional area and the A3 functional area is achieved.

In the embodiment of the application, when a finger presses the position of the a2 functional area, the distance between the RX1 ultrasonic receiver 202 and the TX2 ultrasonic transmitter 201 is relatively shorter, the distance from the TX2 to the TX1 is shorter, and the time is shorter, so that the detection sensitivity and the detection accuracy of the a2 functional area can be effectively improved. That is to say, in the embodiment of the present application, the target ultrasonic device is disposed close to one of the pressure sensors 203, so that the ultrasonic detection accuracy of the corresponding region can be effectively improved.

In summary, the electronic device according to the embodiment of the present application at least includes the following advantages:

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An electronic device, characterized in that the electronic device comprises: the middle frame and at least one group of induction components;

the sensing assembly includes: the pressure sensor, the ultrasonic transmitter and the ultrasonic receiver are all arranged on the second surface and are opposite to the key area, the ultrasonic transmitter is used for transmitting an initial ultrasonic signal, the ultrasonic receiver is used for receiving a reflected ultrasonic signal of the initial ultrasonic signal reflected back through the key area, and the pressure sensor is used for detecting the pressing operation in the key area and generating a corresponding pressure electric signal;

and under the condition that the pressure electric signal is matched with a preset pressure threshold value and the reflected ultrasonic signal is matched with a preset ultrasonic threshold value, enabling the function corresponding to the key area.

2. The electronic device of claim 1, wherein the pressure sensor is disposed between the ultrasonic transmitter and the ultrasonic receiver.

3. The electronic device of claim 1, wherein the key region comprises at least one functional region, and at least one group of the sensing elements is disposed in correspondence with each of the functional regions.

4. The electronic device of claim 3, wherein in the case that the functional region is plural, adjacent ones of the sensing assemblies share a target ultrasonic device, and the target ultrasonic device is the ultrasonic transmitter or the ultrasonic receiver.

5. The electronic device of claim 4, wherein at least one of the target ultrasound devices is not equidistant from two of the pressure sensors adjacent to either side thereof.

6. The electronic device of claim 4, wherein the target ultrasound device is equidistant from two of the pressure sensors adjacent thereto.

7. The electronic device of claim 1, further comprising: a support;

the bracket is arranged on one side of the second surface of the middle frame, and an accommodating groove is formed in the bracket;

the ultrasonic emitter, the ultrasonic receiver and the pressure sensor are all arranged in the accommodating groove.

8. The electronic device of claim 7, further comprising: an acoustic wave barrier;

the sound wave blocking piece is laid at the bottom of the accommodating groove;

the ultrasonic transmitter, the ultrasonic receiver and the pressure sensor are all arranged on the sound wave barrier piece.

9. The electronic device of claim 1, wherein the key area is a slide key area and/or a click key area.

10. The electronic device of claim 3, wherein the functional area comprises: at least one of a power key function region, a volume up function region, or a volume down function region.