WO2021227795A1

WO2021227795A1 - Terminal, proximity detection method, and computer readable storage medium

Info

Publication number: WO2021227795A1
Application number: PCT/CN2021/088519
Authority: WO
Inventors: 胡利华
Original assignee: 中兴通讯股份有限公司
Priority date: 2020-05-13
Filing date: 2021-04-20
Publication date: 2021-11-18
Also published as: CN113746984A

Abstract

Embodiments of the present invention relate to the technical field of terminals. Disclosed are a terminal, a proximity detection method, and a computer readable storage medium. The terminal comprises a screen, a driving device, a main control chip, and an ultrasonic receiver. The driving device is provided under the screen, and is used to drive the screen to emit a first ultrasonic wave. The main control chip is connected to the driving device. When the terminal is detected to be in a call state, the main control chip controls the driving device to drive the screen to emit a first ultrasonic wave. The ultrasonic receiver is used to receive a second ultrasonic wave formed after the first ultrasonic wave has been reflected by the body of a person. The main control chip is connected to the ultrasonic receiver, and is further used to determine whether the body is in the proximity of the screen according to the first ultrasonic wave and the second ultrasonic wave.

Description

Terminal, proximity detection method and computer readable storage medium

Technical field

The embodiments of the present application relate to the field of terminal technology, and in particular, to a terminal, a proximity detection method, and a computer-readable storage medium.

Background technique

At present, the application of smart phones has become very common. Generally, smart phones have a proximity detection function, that is, when people use a smart phone to make a call, when the phone is detected close to the head, the screen of the phone is controlled to turn off the screen to prevent false triggering of the screen. . In some cases, in order to achieve the proximity detection function, an infrared transmitter and receiver are usually embedded in the screen, and infrared reflection is used to determine whether it is close.

However, the inventor found that in these situations, at least the following problem exists: the infrared transmitter and receiver are embedded in the screen, which occupies the screen area and is not conducive to increasing the screen-to-body ratio.

Summary of the invention

The embodiment of the application provides a terminal, including: a screen, a driver, a main control chip, and an ultrasonic receiver; the driver is arranged under the screen and is used to drive the screen to emit a first ultrasonic wave; The control chip is connected to the driver, and is used to control the driver to drive the screen to emit the first ultrasonic wave when it is detected that the terminal is in a call state; the ultrasonic receiver is used to receive the first ultrasonic wave. The second ultrasonic wave formed by the back reflection of the human body; the main control chip is connected to the ultrasonic receiver, and is also used for judging whether the human body is close to the screen according to the first ultrasonic wave and the second ultrasonic wave.

The embodiment of the present application also provides a proximity detection method, which is applied to the above-mentioned terminal, and the method includes: when detecting that the terminal is in a call state, controlling the driver to drive the screen to emit the first ultrasonic wave; The first ultrasonic wave encounters the second ultrasonic wave formed by the reflection of the human body; according to the first ultrasonic wave and the second ultrasonic wave, it is determined whether the human body is close to the screen.

The embodiment of the present application also provides a computer-readable storage medium that stores a computer program, and when the computer program is executed by a processor, the above-mentioned proximity detection method is implemented.

Description of the drawings

One or more embodiments are exemplified by the pictures in the corresponding drawings. These exemplified descriptions do not constitute a limitation on the embodiments. The elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the attached drawings do not constitute a scale limitation.

Fig. 1 is a schematic structural diagram of a terminal provided according to a first embodiment of the present application;

Fig. 2 is a schematic structural diagram of a terminal provided according to a second embodiment of the present application;

Fig. 3 is a flowchart of a proximity detection method provided according to a third embodiment of the present application.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the various embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in each embodiment of the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solution claimed in this application can be realized. The following divisions of the various embodiments are for convenience of description, and should not constitute any limitation on the specific implementation manners of the present application, and the various embodiments may be combined with each other without contradiction.

The purpose of the embodiments of the present application is to provide a terminal, a proximity detection method, and a computer-readable storage medium, so that proximity detection during a call can be completed without occupying a screen area, which is beneficial to increase the screen-to-body ratio of the terminal.

The first embodiment of the present application relates to a terminal; wherein the terminal may be a smart phone with a screen and a call function, a smart watch, a tablet computer, etc. This embodiment mainly introduces the proximity detection when the terminal is in a call state. The terminal of this embodiment will be described in detail below, and the following content is only provided to facilitate understanding of implementation details, and is not necessary for implementing this solution.

The schematic diagram of the structure of the terminal in this embodiment may be shown in FIG.

In one example, the screen 101 is a touch screen, such as a liquid crystal display (LCD) screen. In a specific implementation, if the terminal is a mobile phone, the screen 101 is a mobile phone screen.

Specifically, the driver 102 is arranged under the screen 101 and is used to drive the screen 101 to emit the first ultrasonic wave 105.

In an example, after the driver 102 is activated, it can vibrate according to a preset vibration frequency to drive the screen 101 to emit the first ultrasonic wave 105; wherein the vibration frequency is greater than 20khz. It can be understood that the vibration sensation generated when the driver 102 vibrates at a preset vibration frequency can be transmitted to the screen 101, thereby driving the screen 101 to vibrate to emit the first ultrasonic wave. In the specific implementation, the preset vibration frequency can be set between 20khz and 25khz, which is beneficial to enable the driver 101 to accurately drive the screen 101 to emit the first ultrasonic wave 105 when vibrating, without consuming too much energy. .

In an example, after the driver 102 is activated, it can vibrate according to a preset vibration amplitude to drive the screen 101 to emit the first ultrasonic wave 105; wherein the vibration amplitude is less than the preset amplitude, so that the human body emits the first ultrasonic wave 105 to the screen 101 Vibration is not perceptible, which is conducive to improving the user experience. In a specific implementation, the vibration amplitude can be less than 0.05 mm.

In an example, the first surface of the driver 102 may be close to the inner surface of the screen 101. 1, the screen 101 may have an inner surface 1011 and an outer surface 1012, and the outer surface 1012 is the surface of the screen 101 in contact with the external environment. The first surface of the driver 102 is the surface where the driver 102 contacts the inner surface 1011 of the screen 101. In a specific implementation, the first surface of the driver 102 can be close to any position of the inner surface 1011 of the screen 101. It is understandable that when the first surface of the driver 102 is in close contact with the inner surface 1011 of the screen 101, the vibration sensation generated by the driver 102 when vibrating can be well transmitted to the screen 101, so that the vibration effect of the screen 101 is better. The first ultrasonic wave 105 can be emitted by vibration better.

In one example, the driver 102 can be closely attached to the middle area of the top of the inner surface 1011 of the screen 101, so that when the screen emits the first ultrasonic wave 105, it is easier to encounter the human body, and the second ultrasonic wave is reflected by the human body to facilitate the master The control chip 103 determines whether the human body is close to the screen.

In an example, the first surface of the driver 102 and the inner surface 1011 of the screen 101 can be connected by a preset adhesive, so that the first surface of the driver 102 can be close to the inner surface 1011 of the screen 101. Among them, the adhesive can be selected according to actual needs, which is not specifically limited in this embodiment.

In another example, the first surface of the driver 102 can be tightly attached to the inner surface 1011 of the screen 101 through a structural member.

It should be noted that in the specific implementation, the relationship between the first surface of the driver 102 and the inner surface 1011 of the screen 101 is not taken as an example, and it can also be used without too much influence on the vibration feeling of the driver 102. Under the premise of the screen 101, the first surface of the driver 102 and the inner surface 1011 of the screen 101 are set to be separated by a small distance. However, this embodiment does not specifically limit this.

Specifically, the main control chip 103 is connected to the driver 102 for controlling the driver 102 to drive the screen 101 to emit the first ultrasonic wave 105 when it is detected that the terminal is in a call state.

In an example, when the main control chip 103 detects that the terminal is in a call state, the driver 102 can be activated, and the driver 102 drives the screen 101 to emit the first ultrasonic wave 105 after being activated. For example, when the main control chip 103 detects that the terminal is in a call state, it can send a start signal to the driver 102 to wake up the driver 102 and start to enter the working state. After the driver 102 starts to enter the working state, it starts to vibrate with preset vibration parameters, thereby The screen 101 is driven to emit the first ultrasonic wave 105. Among them, the preset vibration parameters may include vibration frequency and vibration amplitude. In a specific implementation, the main control chip 103 can control the driver 102 to stop working and stop driving the screen 101 to emit the first ultrasonic wave 105 after detecting that the terminal is pushed out of the call state.

In an example, the driver 102 can pre-store preset vibration parameters. After receiving the start signal sent by the main control chip 103, it can start to vibrate according to the pre-stored vibration parameters to drive the screen 101 to emit the first ultrasonic wave 105. Among them, the vibration parameters can include vibration frequency and vibration amplitude.

In another example, when the main control chip 103 detects that the terminal is in a call state, it may send a start signal carrying a vibration parameter to the driver 102; wherein the vibration parameter may include a vibration frequency and a vibration amplitude. After receiving the start signal sent by the main control chip 103, the driver 102 obtains the vibration parameter carried in the start signal, and starts to vibrate according to the obtained vibration parameter to drive the screen 101 to emit the first ultrasonic wave 105. In specific implementation, when the main control chip 103 is in different environments, the value of the vibration parameter sent can be the same or different. For example, the main control chip 103 can adjust the parameter value of the vibration parameter according to the characteristics of the environment in which the terminal is located. Size, but this embodiment does not specifically limit this.

Specifically, the ultrasonic receiver 104 is connected to the main control chip 103 for receiving the second ultrasonic wave formed by the reflection of the first ultrasonic wave 105 after encountering the human body.

In an example, the main control chip 103 can activate the ultrasonic receiver 104 when detecting that the terminal is in a call state, so that the ultrasonic receiver 104 starts to work. When the first ultrasonic wave 105 encounters the human body, it is reflected by the human body to form a second ultrasonic wave. , The second ultrasonic wave can be received by the ultrasonic receiver 104.

In another example, the ultrasonic receiver 104 may be a microphone. It is understandable that usually mobile phones, tablet computers and other terminals have their own microphones. Therefore, the microphone of the terminal itself can be used to receive the reflected second ultrasonic waves. This makes it unnecessary to provide additional devices for receiving the second ultrasonic wave. In specific implementation, terminals such as mobile phones and tablet computers basically have two microphones, which are located at the top and bottom of the terminal, respectively. The ultrasonic receiver 104 in FIG. 1 can be understood as a microphone set on the top of the terminal. According to actual needs, you can choose one of the two microphones located at the top and bottom of the terminal to receive the reflected second ultrasonic wave, or you can use the two microphones located at the top and bottom of the terminal to receive the reflected second ultrasound. The second ultrasonic wave, however, this embodiment does not specifically limit this.

In a specific implementation, after receiving the second ultrasonic wave, the ultrasonic receiver 104 can obtain the characteristic data of the second ultrasonic wave, and perform analog-to-digital conversion on the characteristic data of the second ultrasonic wave to obtain the converted second ultrasonic wave data. The second ultrasonic data may include the intensity of the second ultrasonic wave, the time point when the second ultrasonic wave is received, and the like.

Specifically, the main control chip 103 is also used to determine whether the human body is close to the screen 101 according to the first ultrasonic wave 105 and the second ultrasonic wave. For example, the main control chip 103 may read the second ultrasonic data after the analog-to-digital conversion from the ultrasonic receiver 104, or the ultrasonic receiver 104 actively sends the second ultrasonic data after the analog-to-digital conversion to the main control chip 103.

In an example, the main control chip 103 may record the first time point when the screen 101 emits the first ultrasonic wave 105, and record the second time point when the ultrasonic receiver receives the second ultrasonic wave. Calculate the time difference between the first time point and the second time point. According to the calculated time difference, it is judged whether the human body is close to the screen. In a specific implementation, the main control chip 103 can estimate the distance between the human body and the screen according to the calculated time difference and the propagation speed of the ultrasonic wave, so as to determine whether the human body is close to the screen according to the distance between the human body and the screen. For example, the approach threshold and the distance threshold can be preset. If the distance between the human body and the screen is less than the preset approach threshold, it can be determined that the human body is approaching the screen; if the distance between the human body and the screen is greater than the preset distance threshold, you can Determine that the human body is far away from the screen. Wherein, the approach threshold and the distance threshold may be distance thresholds set according to actual needs, and the distance threshold is greater than the approach threshold.

In another example, the main control chip 103 can acquire the first sound wave intensity of the first ultrasonic wave 105 and acquire the second sound wave intensity of the second ultrasonic wave. Then, the intensity difference between the first sound wave intensity and the second sound wave intensity is calculated, so as to determine whether the human body is close to the screen according to the calculated intensity difference. For example, the intensity difference threshold can be preset according to actual needs, and the calculated intensity difference can be compared with the intensity difference threshold. If the calculated intensity difference is greater than the intensity difference threshold, it can be determined that the human body is far away from the screen; if the calculated intensity difference is less than or equal to the intensity The difference threshold, you can determine that the human body is close to the screen.

In a specific implementation, it is also possible to directly determine whether the human body is close to the screen according to the intensity of the second sound wave. For example, if the intensity of the second sound wave is greater than the preset first intensity value, it is determined that the human body is close to the screen; if the intensity of the second sound wave is less than the preset second intensity value, it is determined that the human body is far away from the screen. Wherein, the first intensity value and the second intensity value are sound wave intensity values set according to actual needs, and the first intensity value is greater than the second intensity value.

In one example, if it is determined that the human body is close to the screen, the main control chip can control the screen to turn off the screen, for example, it can control the turning off of the screen backlight. If it is determined that the human body is far away from the screen, the main control chip can control the screen to light up, for example, it can control the turning on of the screen backlight. Thus, during the call, the screen can be automatically controlled on and off based on the distance between the human body and the screen. When it is determined that the human body is close to the screen, controlling the screen to turn off is beneficial to prevent false triggering of the screen and is beneficial to reduce power consumption; when it is determined that the human body is far away from the screen, controlling the screen to turn on the screen is beneficial to user operations and enhances the user experience.

It should be noted that the above-mentioned examples in this embodiment are all illustrations for the convenience of understanding, and do not constitute a limitation to the technical solution of the present application.

In order to achieve proximity detection in this embodiment, a driver for driving the screen to emit ultrasonic waves is added to the hardware. The screen is controlled to drive the screen to emit the first ultrasonic waves, and the ultrasonic receiver receives the second ultrasonic waves that are reflected after the first ultrasonic waves meet the human body. . Therefore, it can be determined whether the human body is close to the screen according to the first ultrasonic wave emitted by the screen and the second ultrasonic wave received by the ultrasonic receiver. Since the additional driver is arranged under the screen, it does not occupy the area of the screen, which is beneficial to increase the screen-to-body ratio. That is, the embodiment of the present application can complete the proximity detection during a call without occupying the screen area, which is convenient Terminal design with full screen.

The second embodiment of the present application relates to a terminal. The terminal of this embodiment will be described in detail below, and the following content is only provided to facilitate understanding of implementation details, and is not necessary for implementing this solution.

The terminal in this embodiment may be as shown in FIG. 2, and specifically includes: a terminal body 100 and a screen 101, a driver 102, a main control chip 103, an ultrasonic receiver 104 arranged in the terminal body 100, and a peripheral device arranged around the driver 102. Peripheral devices. In this embodiment, the peripheral devices are the peripheral device 201 and the peripheral device 202 in FIG. 2 as examples. In specific implementation, the number of peripheral devices is not limited thereto. Peripheral devices are devices that are set according to actual needs to implement related functions. However, this embodiment does not specifically limit the functions implemented by the peripheral devices.

Specifically, the separation distance between the second surface of the driver 102 and the peripheral device 201 and the peripheral device 202 is greater than or equal to a preset distance; wherein, the second surface is all surfaces of the driver 102 except the first surface. , The preset distance can be set according to actual needs, for example, it can be set to 0.1mm. The first surface of the driver 102 can be a surface that is in close contact with the inner surface 1011 of the screen 101, and the first surface in FIG. 2 can be understood as the right surface of the driver 102. The second surface can be understood as the upper surface, lower surface, and left surface of the driver 102, the peripheral device 201 and the upper surface of the driver 102 are at least a predetermined distance apart, and the peripheral device 202 and the lower surface of the driver 102 are at least a predetermined distance apart to Ensure that neither the peripheral device 201 nor the peripheral device 202 touches the driver 102. It can be understood that, in specific implementation, if necessary, peripheral devices may be provided at a position spaced at least a predetermined distance from the left surface of the driver 102. However, this embodiment does not specifically limit this.

That is to say, in a specific implementation, for the peripheral devices disposed around the driver 102, the peripheral devices are separated from the second surface of the driver 102 by at least a predetermined distance.

In this embodiment, the separation distance between the second surface of the driver and the peripheral devices is greater than or equal to the preset distance to ensure that the driver does not touch the peripheral devices. On the one hand, it will not affect the normal operation of the peripheral devices, and on the other hand, it is conducive to the vibration of the driver. The vibration at the time is transmitted to the screen as concentrated as possible without being dispersed to the peripheral devices, which is beneficial to further improve the driving effect of the driver.

It is worth mentioning that, in order to highlight the innovative part of this application, the first and second embodiments do not introduce devices that are not too closely related to solving the technical problems raised by this application, but this does not indicate that this There are no other devices in the terminal in the embodiment.

The third embodiment of the present application relates to a proximity detection method, which is applied to the terminal in the first or second embodiment. The proximity detection method of this embodiment will be described in detail below. The following content is only provided to facilitate understanding of the implementation details, and is not necessary for implementing this solution.

Refer to Fig. 3 for the flow chart of the proximity detection method in this embodiment, including:

Step 301: When it is detected that the terminal is in a call state, the driver is controlled to drive the screen to emit the first ultrasonic wave.

In other words, after the user initiates a call, the terminal determines that it is currently in a call state, and then controls the driver to drive the screen to emit the first ultrasonic wave. For example, the driver is controlled to start vibrating at a preset vibration frequency and vibration amplitude, thereby driving the screen to start vibrating to emit the first ultrasonic wave.

Step 302: Receive the second ultrasonic wave formed by the reflection of the first ultrasonic wave after encountering the human body through the ultrasonic receiver.

Specifically, if the first ultrasonic wave emitted by the screen encounters the human body, it will be reflected by the human body to form a second ultrasonic wave, and the ultrasonic receiver in the terminal can receive the second ultrasonic wave formed by the reflection. In an example, the ultrasonic receiver may be an original microphone on the terminal.

Step 303: Determine whether the human body is close to the screen according to the first ultrasonic wave and the second ultrasonic wave; if so, go to step 304, otherwise go to step 305.

In an example, the terminal may record the first time point when the screen emits the first ultrasound, and record the second time point when the ultrasound receiver receives the second ultrasound. Then, the time difference between the first time point and the second time point is calculated. Then, according to the calculated time difference, it is judged whether the human body is close to the screen. In a specific implementation, the terminal can estimate the distance between the human body and the screen according to the calculated time difference and the propagation speed of the ultrasonic wave, so as to determine whether the human body is close to the screen according to the distance between the human body and the screen. For example, the approach threshold and the distance threshold can be preset. If the distance between the human body and the screen is less than the preset approach threshold, it can be determined that the human body is approaching the screen; if the distance between the human body and the screen is greater than the preset distance threshold, you can Determine that the human body is far away from the screen. Wherein, the approach threshold and the distance threshold may be distance thresholds set according to actual needs, and the distance threshold is greater than the approach threshold.

In another example, the terminal may obtain the first sound wave intensity of the first ultrasonic wave, and obtain the second sound wave intensity of the second ultrasonic wave. Then, the intensity difference between the first sound wave intensity and the second sound wave intensity is calculated, so as to determine whether the human body is close to the screen according to the calculated intensity difference. For example, the intensity difference threshold can be preset according to actual needs, and the calculated intensity difference can be compared with the intensity difference threshold. If the calculated intensity difference is greater than the intensity difference threshold, it can be determined that the human body is far away from the screen; if the calculated intensity difference is less than or equal to the intensity The difference threshold, you can determine that the human body is close to the screen.

Step 304: The control screen is turned off.

Step 305: Control the screen to turn on.

In other words, if it is determined that the human body is close to the screen, the terminal can control the screen to turn off the screen, for example, it can control the turning off of the screen backlight. If it is determined that the human body is far away from the screen, the terminal can control the screen to turn on, for example, the screen backlight can be turned on. Thus, during the call, the screen can be automatically controlled on and off based on the distance between the human body and the screen. When it is determined that the human body is close to the screen, controlling the screen to turn off is beneficial to prevent false triggering of the screen and is beneficial to reduce power consumption; when it is determined that the human body is far away from the screen, controlling the screen to turn on the screen is beneficial to user operations and enhances the user experience.

In this embodiment, after the proximity detection is completed, it is only taken as an example to control the on and off of the screen based on the detection result, that is, the determination result of whether the human body is close to the screen, and the specific implementation is not limited to this. According to actual needs, other operations can be performed based on the determination result of whether the human body is close to the screen.

In this embodiment, when it is detected that the terminal is in a call state, the driver is controlled to drive the screen to emit the first ultrasonic wave, and the second ultrasonic wave formed by the reflection of the first ultrasonic wave upon the human body is received by the ultrasonic receiver. Therefore, it can be determined whether the human body is close to the screen according to the first ultrasonic wave emitted by the screen and the second ultrasonic wave received by the ultrasonic receiver. Since the driver in the terminal is set under the screen, it does not occupy the area of the screen, which is beneficial to increase the screen-to-body ratio. That is, the embodiment of the present application can complete the proximity detection during a call without occupying the screen area, which is convenient A terminal design with a full screen.

It is not difficult to find that this embodiment is a method embodiment corresponding to the first or second embodiment, and this embodiment can be implemented in cooperation with the first or second embodiment. The related technical details and technical effects mentioned in the first or second embodiment are still valid in this embodiment, and in order to reduce repetition, they will not be repeated here. Correspondingly, the related technical details mentioned in this embodiment can also be applied to the first or second embodiment.

The division of the steps of the various methods above is just for clarity of description. When implemented, it can be combined into one step or some steps can be split and decomposed into multiple steps. As long as they include the same logical relationship, they are all within the scope of protection of this patent. ; Adding insignificant modifications to the algorithm or process or introducing insignificant design, but not changing the core design of the algorithm and process are within the scope of protection of the patent.

The fourth embodiment of the present application relates to a computer-readable storage medium, which stores a computer program. When the computer program is executed by the processor, the above method embodiment is realized.

That is, those skilled in the art can understand that all or part of the steps in the method of the foregoing embodiments can be implemented by instructing relevant hardware through a program. The program is stored in a storage medium and includes several instructions to enable a device ( It may be a single-chip microcomputer, a chip, etc.) or a processor (processor) that executes all or part of the steps of the methods described in the embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

A person of ordinary skill in the art can understand that the above-mentioned embodiments are specific embodiments for realizing the present application, and in practical applications, various changes can be made to them in form and details without departing from the spirit and spirit of the present application. Scope.

Claims

A terminal, including: a screen, a driver, a main control chip, and an ultrasonic receiver;

The driver is arranged under the screen, and is used to drive the screen to emit a first ultrasonic wave;

The main control chip is connected to the driver, and is configured to control the driver to drive the screen to emit a first ultrasonic wave when it is detected that the terminal is in a call state;

The ultrasonic receiver is configured to receive the second ultrasonic wave formed by the reflection of the first ultrasonic wave after encountering the human body;

The main control chip is connected to the ultrasonic receiver, and is also used for judging whether the human body is close to the screen according to the first ultrasonic wave and the second ultrasonic wave.
The terminal according to claim 1, wherein the ultrasonic receiver is a microphone.
The terminal according to claim 1, wherein the first surface of the driver is close to the inner surface of the screen.
The terminal according to claim 3, wherein the terminal further comprises a peripheral device arranged around the driver, and a separation distance between the second surface of the driver and the peripheral device is greater than or equal to a preset distance; Wherein, the second surface is a surface excluding the first surface among all surfaces of the driver.
The terminal according to claim 3, wherein the driver is closely attached to the middle area of the top of the inner surface of the screen.
The terminal according to any one of claims 1 to 5, wherein the driver is used to vibrate according to a preset vibration amplitude to drive the screen to emit a first ultrasonic wave after being activated; wherein the vibration amplitude is less than the preset vibration amplitude. Set the amplitude.
A proximity detection method, applied to the terminal according to any one of claims 1 to 6, the method comprising:

When detecting that the terminal is in a call state, controlling the driver to drive the screen to emit the first ultrasonic wave;

Receiving, by an ultrasonic receiver, the second ultrasonic wave formed by reflection of the first ultrasonic wave after encountering a human body;

According to the first ultrasonic wave and the second ultrasonic wave, it is determined whether the human body is close to the screen.
8. The proximity detection method according to claim 7, wherein the judging whether the human body is close to the screen according to the first ultrasonic wave and the second ultrasonic wave comprises:

Record the first time point when the screen emits the first ultrasound, and record the second time point when the ultrasound receiver receives the second ultrasound;

Calculating the time difference between the first time point and the second time point;

According to the time difference, it is determined whether the human body is close to the screen.
8. The proximity detection method according to claim 7, wherein the judging whether the human body is close to the screen according to the first ultrasonic wave and the second ultrasonic wave comprises:

Acquiring the first sound wave intensity of the first ultrasonic wave, and acquiring the second sound wave intensity of the second ultrasonic wave;

Calculating the intensity difference between the intensity of the first sound wave and the intensity of the second sound wave;

According to the intensity difference, it is determined whether the human body is close to the screen.
A computer-readable storage medium that stores a computer program, and when the computer program is executed by a processor, the proximity detection method according to any one of claims 7 to 9 is realized.