CN110309752A - Ultrasonic processing method, device, storage medium and electronic device - Google Patents

Abstract

Embodiments of the present application provide an ultrasonic processing method, device, storage medium, and electronic device. The method includes: acquiring a current mode; if the current mode is a first mode, controlling the ultrasonic sensor to transmit a first transmission frequency of the first transmission frequency. Ultrasonic signal; receive the first reflected signal reflected from the first ultrasonic signal by the obstacle, and obtain target fingerprint information according to the first reflected signal; if the current mode is the second mode, control the ultrasonic sensor to transmit the second transmission The second ultrasonic signal of the frequency, the second transmission frequency is lower than the first transmission frequency; receive the second reflection signal of the second ultrasonic signal reflected by the obstacle, and obtain the target distance according to the second reflection signal information. The screen-to-body ratio of the display can be increased.

Description

Ultrasonic processing method, device, storage medium and electronic device

technical field

The present application relates to the field of electronic technology, and in particular, to an ultrasonic processing method, device, storage medium and electronic device.

Background technique

With the development of electronic technology, electronic devices such as smart phones are used more and more frequently in users' lives. Usually, during a call on an electronic device, the electronic device needs to detect the distance between the user's face and the electronic device to control the display screen of the electronic device to turn on or off, so as to prevent the user's face from touching the electronic device's screen. display and cause misoperation. When the user unlocks the electronic device, realizes the shopping function through the electronic device, and realizes the payment function through the electronic device, the user's identity needs to be verified, and the electronic device needs to identify the user's fingerprint to determine whether the current user has the operation authority.

In order to realize the above functions, an independent distance sensor needs to be set in the electronic device to realize the distance detection function, and an independent fingerprint recognition sensor needs to be set in the electronic device to realize the fingerprint identification function. Both the independent distance sensor and the fingerprint recognition sensor need to occupy the non-display area of the display screen of the electronic device, which leads to an increase in the area of the non-display area of the display screen, which is not conducive to increasing the screen ratio of the display screen.

SUMMARY OF THE INVENTION

Embodiments of the present application provide an ultrasonic processing method, apparatus, storage medium, and electronic device, which can improve the screen ratio of the display screen of the electronic device.

An embodiment of the present application provides an ultrasonic processing method, which is applied to an electronic device, where the electronic device includes an ultrasonic sensor; the method includes:

get the current mode;

If the current mode is the first mode, controlling the ultrasonic sensor to transmit the first ultrasonic signal of the first transmission frequency;

receiving the first reflection signal reflected by the first ultrasonic signal from the obstacle, and obtaining target fingerprint information according to the first reflection signal;

If the current mode is the second mode, the ultrasonic sensor is controlled to transmit a second ultrasonic signal with a second transmission frequency, and the second transmission frequency is lower than the first transmission frequency;

A second reflected signal reflected by the second ultrasonic signal from the obstacle is received, and target distance information is acquired according to the second reflected signal.

The embodiment of the present application further provides an ultrasonic processing apparatus, which is applied to electronic equipment, and the electronic equipment includes an ultrasonic sensor; the apparatus includes:

The first acquisition module is used to acquire the current mode;

a first transmitting module, configured to control the ultrasonic sensor to transmit a first ultrasonic signal of a first transmitting frequency if the current mode is the first mode;

a second acquisition module, configured to receive the first reflected signal reflected from the first ultrasonic signal by the obstacle, and obtain target fingerprint information according to the first reflected signal;

a second transmitting module, configured to control the ultrasonic sensor to transmit a second ultrasonic signal of a second transmitting frequency if the current mode is the second mode, the second transmitting frequency being lower than the first transmitting frequency;

The third acquisition module is configured to receive the second reflected signal reflected by the second ultrasonic signal through the obstacle, and acquire target distance information according to the second reflected signal.

An embodiment of the present application further provides a storage medium, where a computer program is stored in the storage medium, and when the computer program runs on a computer, the computer is made to execute the above ultrasonic processing method.

An embodiment of the present application further provides an electronic device, including a processor and a memory, where a computer program is stored in the memory, and the processor is configured to execute the above ultrasonic processing method by acquiring the computer program stored in the memory .

In the ultrasonic processing method, device, storage medium, and electronic device provided by the embodiments of the present application, the current mode is obtained first; if the current mode is the first mode, the ultrasonic sensor is controlled to transmit the first ultrasonic signal of the first transmission frequency; The first reflection signal of the first ultrasonic signal is reflected back by the obstacle, and the target fingerprint information is obtained according to the first reflection signal; if the current mode is the second mode, the ultrasonic sensor is controlled to transmit the second transmission frequency of the second transmission frequency. Ultrasonic signal, the second transmission frequency is lower than the first transmission frequency; the second reflection signal of the second ultrasonic signal reflected by the obstacle is received, and the target distance information is obtained according to the second reflection signal. The ultrasonic sensor can be used to obtain distance information and fingerprint information, and it is obtained through ultrasonic signals. The ultrasonic signals can pass through the display screen, etc., so there is no need to set a separate non-display area for the ultrasonic sensor on the display screen, which can reduce the impact of the ultrasonic sensor on the display screen. The non-display area is occupied, so the screen ratio of the display screen can be increased.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a schematic flowchart of an ultrasonic processing method provided by an embodiment of the present application.

FIG. 2 is another schematic flowchart of the ultrasonic processing method provided by the embodiment of the present application.

FIG. 3 is a schematic structural diagram of an ultrasonic processing apparatus provided in an embodiment of the present application.

FIG. 4 is a schematic diagram of a first structure of an electronic device provided by an embodiment of the present application.

FIG. 5 is a schematic diagram of a second structure of an electronic device provided by an embodiment of the present application.

FIG. 6 is a cross-sectional view of the electronic device shown in FIG. 5 along the direction P1-P1.

FIG. 7 is a schematic diagram of a first structure of an ultrasonic sensor provided by an embodiment of the present application.

FIG. 8 is a schematic diagram of a second structure of an ultrasonic sensor provided by an embodiment of the present application.

FIG. 9 is a schematic structural diagram of a second electrode layer in an ultrasonic sensor provided by an embodiment of the present application.

FIG. 10 is a schematic structural diagram of a first electrode layer in an ultrasonic sensor provided by an embodiment of the present application.

FIG. 11 is a schematic diagram of a connection relationship between a control chip, a first electrode layer and a second electrode layer in an ultrasonic sensor provided by an embodiment of the present application.

FIG. 12 is a schematic diagram of a second structure of an electronic device provided by an embodiment of the present application.

FIG. 13 is a cross-sectional view of the electronic device shown in FIG. 12 along the P2-P2 direction.

FIG. 14 is a schematic diagram of a first structure of a display screen provided by an embodiment of the present application.

FIG. 15 is a schematic diagram of a second structure of a display screen provided by an embodiment of the present application.

FIG. 16 is a schematic diagram of a third structure of a display screen provided by an embodiment of the present application.

FIG. 17 is a schematic diagram of an application scenario of distance detection performed by an electronic device according to an embodiment of the present application.

FIG. 18 is a schematic diagram of an application scenario of fingerprint identification performed by an electronic device according to an embodiment of the present application.

FIG. 19 is a schematic diagram of the principle of fingerprint identification performed by the electronic device provided by the embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of this application.

Embodiments of the present application provide an electronic device. The electronic device may be a smart phone, a tablet computer, etc., or a game device, an AR (Augmented Reality, augmented reality) device, a car device, a data storage device, an audio playback device, a video playback device, a notebook computer, and a desktop computing device. equipment, etc.

Referring to FIG. 1 , FIG. 1 is a schematic flowchart of an ultrasonic treatment method provided by an embodiment of the present application. The ultrasonic treatment method provided in the embodiment of the present application is applied to electronic equipment, and the ultrasonic treatment method specifically includes:

101. Obtain the current mode.

Get the current mode of the electronic device. The current mode may include a first mode and a second mode, the first mode may be understood as the current application needs to obtain fingerprint information, and the second mode may be understood as the current application needs to obtain the distance information. For example, the current application (such as payment application) needs to obtain fingerprint information for payment, the current application (lock screen application) needs to obtain fingerprint information to unlock the mobile phone, etc., and the current application (display control application) needs to obtain distance information to change the display screen or screen. Bright screen, etc., the current application (ranging application) needs to obtain distance information for ranging and so on.

102. If the current mode is the first mode, control the ultrasonic sensor to transmit a first ultrasonic signal with a first transmission frequency.

If the current mode is the first mode, that is, the current application needs to acquire fingerprint information, the ultrasonic sensor is controlled to transmit a first ultrasonic signal with a first transmission frequency. Specifically, whether it is the first mode can also be determined by the currently running application program, for example, when the currently running application is a payment application with a fingerprint payment function, the current mode is determined to be the first mode. Of course, it can also be determined according to the information called by the current application. For example, only when the payment application enables the fingerprint payment function to call the fingerprint information, the current mode is determined to be the first mode, that is, when the payment application is running, but the fingerprint payment function is not activated, It also cannot be determined that the current mode is the first mode.

103. Receive a first reflected signal from the first ultrasonic signal reflected by an obstacle, and acquire target fingerprint information according to the first reflected signal.

After the first ultrasonic signal is transmitted, the first reflection signal is reflected back by obstacles (such as the user's finger), and different parts of the fingerprint pattern on the user's finger are reflected to generate different first reflection signals. The fingerprint image of the user's finger is acquired according to the first reflected signal.

104. If the current mode is the second mode, control the ultrasonic sensor to transmit a second ultrasonic signal with a second transmission frequency, where the second transmission frequency is lower than the first transmission frequency.

If the current mode is the first mode, that is, the current application needs to obtain distance information, the ultrasonic sensor is controlled to transmit a second ultrasonic signal at a second transmission frequency that is lower than the first transmission frequency. Specifically, whether it is the second mode can also be determined through the currently running application program. For example, when the currently running application is a distance measurement application with ultrasonic distance measurement, the current mode is determined to be the second mode. Of course, it can also be determined according to the information called by the current application. For example, the current mode is determined to be the second mode only when the distance measurement application enables the distance measurement function.

105. Receive a second reflected signal from the second ultrasonic signal reflected by the obstacle, and acquire target distance information according to the second reflected signal.

After the second ultrasonic signal is transmitted, the ultrasonic sensor receives the second reflected signal through the second reflected signal reflected by the obstacle (such as the user's face), according to the intensity of the second reflected signal or according to the second ultrasonic signal and the second transmitted signal. The difference in signal strength or the time difference between transmitting the second ultrasonic signal and receiving the second reflected signal can detect the distance information between the obstacle and the electronic device.

In the related art, for the infrared proximity sensor, a special infrared sensor is required, and the infrared sensor is not conducive to the full-screen design of the display screen. The light spot will affect the display effect; therefore, the current infrared proximity can only be used under the screen. For the touch screen to achieve proximity detection, since the touch screen function uses coupling capacitors, it needs to be compatible with the touch screen function and proximity function in a call scenario, which is prone to false touches; Test proximity has limited sensitivity. The test distance of infrared proximity is more than 4cm.

Therefore, in the ultrasonic processing method provided by the embodiments of the present application, the same ultrasonic sensor can be used to realize the function of distance detection and the function of fingerprint recognition. In addition, the ultrasonic sensor can be arranged under the display area of the display screen. When the ultrasonic sensor realizes distance detection and fingerprint recognition, it is detected and recognized by ultrasonic signals. The ultrasonic signals can pass through the display screen, so that there is no need for The ultrasonic sensor sets the non-display area separately, that is, the occupation of the non-display area of the display screen by the ultrasonic sensor can be reduced, so the screen ratio of the display screen can be increased.

In addition, the higher the frequency of the ultrasonic signal, the shorter the wavelength, the better the straight-line propagation, the less likely it will be diffracted when it touches an obstacle, and the greater the loss during transmission in the medium. Correspondingly, the smaller the frequency of the ultrasonic signal, the longer the wavelength, the worse the straight-line propagation, the diffraction is relatively easy to occur when it touches the obstacle, and the loss is relatively small when it is transmitted in the medium. The ultrasonic frequency is high, and it is easy to attenuate in the air, but the straight line propagation is good. If the ultrasonic wave is used for fingerprint recognition, the transmitted signal only needs to reach the fingerprint in contact with the screen. After the fingerprint is reflected, it is received by the ultrasonic sensor without the influence of the air layer in the middle. . The ultrasonic frequency is low and can be transmitted in the air, but due to poor linear transmission, the image of the object cannot be obtained, and only the presence or absence of the reflected signal of the occluded object can be judged, so as to realize the function of distance information acquisition or proximity function. In the first mode, that is, when the target fingerprint information needs to be acquired, the ultrasonic sensor is controlled to transmit a first ultrasonic signal at a high frequency (a first transmission frequency). In the second mode, when the target distance information needs to be acquired, the ultrasonic sensor is controlled to transmit a second ultrasonic signal at a low frequency (second transmission frequency).

Referring to FIG. 2 , FIG. 2 is another schematic flowchart of an ultrasonic treatment method provided by an embodiment of the present application. The ultrasonic treatment method provided in the embodiment of the present application is applied to the electronic device in any of the above-mentioned embodiments, and the ultrasonic treatment method specifically includes:

201. Acquire information called by the current application.

Get the current mode of the electronic device. The current mode may include a first mode and a second mode, and the first mode and the second mode are distinguished according to information called by the current application.

202. If the information called by the current application is fingerprint information, determine that the current mode is the first mode.

The first mode can be understood as the current application needs to acquire fingerprint information. For example, a current application (such as a payment application) needs to acquire fingerprint information for payment, and a current application (screen lock application) needs to acquire fingerprint information to unlock a mobile phone, and so on.

For example, when the current application is a payment application, it may only check the payment record without using fingerprint payment, then the current mode is not considered to be the first mode. Only when the fingerprint payment function is used to call the fingerprint information, the current The mode is the first mode.

203. If the information called by the current application is the distance information, determine that the current mode is the second mode.

The second mode can be understood as the current application needs to obtain distance information. For example, the current application (display control application) needs to obtain distance information to turn off the screen or turn on the screen, etc. The display needs to be turned off during a call to prevent accidental touches. The current application (ranging application) needs to obtain distance information for ranging and so on. An electronic device can run multiple applications at the same time, and at this time, multiple applications may respectively call fingerprint information and distance information. For example, when the screen is off, it is necessary to call the distance information to determine whether to light up the fingerprint icon (lighting up part or all of the display screen) to prompt the user to identify the location of the fingerprint, and also to call the fingerprint information to determine whether to unlock and brighten the screen. At this time, it is determined whether the current mode is the first mode or the second mode through the called information.

In some applications, the same application will call different information at different times. In this case, the current mode is determined by the information called by the application. For example, when using the WeChat application, the distance information will be called to determine whether the screen is closed when using the video call or voice call, and the fingerprint information will be called for fingerprint payment when using the WeChat payment.

In some embodiments, determining the current mode may further include:

If it is currently in the screen-off state, it is determined that the current mode is the second mode.

When the display screen of the electronic device is in an off-screen state, it is directly determined that the current mode is the second mode, instead of determining by judging the calling information of the current application.

204. If the current mode is the first mode, control the ultrasonic sensor to transmit a first ultrasonic signal of a first transmission frequency.

If the current mode is the first mode, that is, the current application needs to acquire fingerprint information, the ultrasonic sensor is controlled to transmit a first ultrasonic signal with a first transmission frequency.

205. Receive a first reflected signal from the first ultrasonic signal reflected by an obstacle, and acquire target fingerprint information according to the first reflected signal.

After the first ultrasonic signal is transmitted, the first reflection signal is reflected back by obstacles (such as the user's finger), and different parts of the fingerprint pattern on the user's finger are reflected to generate different first reflection signals. The fingerprint image of the user's finger is acquired according to the first reflected signal.

206. If the current mode is the second mode, control the ultrasonic sensor to transmit a second ultrasonic signal with a second transmission frequency, where the second transmission frequency is lower than the first transmission frequency.

If the current mode is the first mode, that is, the current application needs to obtain distance information, the ultrasonic sensor is controlled to transmit a second ultrasonic signal at a second transmission frequency that is lower than the first transmission frequency.

207. Receive a second reflection signal of the second ultrasonic signal reflected back by the obstacle, and acquire target distance information according to the second reflection signal.

After the second ultrasonic signal is transmitted, the second reflected signal is reflected back by the obstacle (such as the user's face), and the ultrasonic sensor receives the second reflected signal. According to the intensity of the second reflected signal or according to the second ultrasonic signal and the second transmitted signal The difference in signal strength or the time difference between transmitting the second ultrasonic signal and receiving the second reflected signal can detect the distance information between the obstacle and the electronic device.

In some embodiments, the method further includes:

If the current mode is the second mode, which is directly determined by the display screen of the electronic device in the off-screen state, determining whether the display screen of the electronic device is blocked by an object according to the distance information;

If there is no obstruction, the fingerprint prompt information is displayed in the first area of the display screen of the electronic device, and the ultrasonic sensor is controlled to transmit the first ultrasonic signal of the first transmission frequency;

Within a preset time period, receive a first reflection signal of the first ultrasonic signal reflected back by the obstacle, and determine whether the target fingerprint information is acquired according to the first reflection signal;

If the target fingerprint information is not acquired within the preset time period, the ultrasonic sensor is controlled to transmit a second ultrasonic signal at a second transmission frequency.

In the screen-off state, first determine whether the display screen of the electronic device is blocked by an object according to the distance information. If there is no blockage, the electronic device may be placed on the table or held. At this time, the ultrasonic sensor is controlled to transmit the first transmission frequency. The first ultrasonic signal is used to identify fingerprint information for unlocking the electronic device. If the fingerprint is not recognized within the preset time period, indicating that the current electronic device is not in use, the ultrasonic sensor can be switched to transmit the second ultrasonic signal at the second transmission frequency to reduce power consumption.

In some embodiments, if the target fingerprint information is not acquired within the preset time period, after controlling the ultrasonic sensor to transmit the second ultrasonic signal at the second transmission frequency, the method further includes:

If it is detected that the electronic device is shaking, controlling the ultrasonic sensor to transmit a first ultrasonic signal of a first transmission frequency;

or

If it is detected that the display screen of the electronic device is blocked by an object, the ultrasonic sensor is controlled to transmit a first ultrasonic signal of a first transmission frequency.

After switching the ultrasonic sensor to transmit the second ultrasonic signal at the second transmission frequency, if the electronic device is detected shaking (which can be detected by G-Sensor, etc.), it is considered that the user may need to use the electronic device. At this time, control the ultrasonic wave at this time. The sensor transmits a first ultrasonic signal of a first transmission frequency, which is used to identify fingerprint information and to unlock the electronic device. Also, if it is detected that the display screen of the electronic device is blocked, that is, the display screen of the electronic device is from unobstructed to blocked, it is considered that the user may need to use the electronic device. At this time, the ultrasonic sensor is controlled to transmit the first transmission frequency. The first ultrasonic signal is used to identify fingerprint information for unlocking the electronic device.

It should be noted that the ultrasonic sensor of the electronic device may be arranged under the display screen, and may cover a part of the display screen, the entire display area of the display screen, or the entire display area of the display screen.

After controlling the ultrasonic sensor to transmit the first ultrasonic signal of the first transmission frequency, if the fingerprint information is not recognized after a period of time, then switch back to controlling the ultrasonic sensor to transmit the second ultrasonic signal at the second transmission frequency.

In some embodiments, if the current mode is the second mode and is directly determined by the display screen of the electronic device in an off-screen state, after determining whether the display screen of the electronic device is blocked by an object according to the distance information, the method further includes:

If it is blocked, control the ultrasonic sensor to transmit the first ultrasonic signal of the first transmission frequency;

Receive the first reflection signal of the first ultrasonic signal reflected by the obstacle, and determine whether the target fingerprint information is acquired according to the first reflection signal;

If the target fingerprint information is obtained, control the display screen of the electronic device to light up the screen. The screen may be turned on as long as the target fingerprint information is detected, or only the detected target fingerprint information and the preset stored in the electronic device may be used. The screen only lights up when the fingerprint information matches;

If the target fingerprint information is not obtained, the ultrasonic sensor is controlled to transmit the second ultrasonic signal at the second transmission frequency, and the ultrasonic sensor may be controlled to transmit the first ultrasonic signal at the first transmission frequency after a period of time. The ultrasonic sensor can be controlled to transmit the second ultrasonic signal at the second transmission frequency until the occlusion information is not changed.

If there is a blockage, it may be that the user's finger blocks the display screen, and the fingerprint may be unlocked, and the ultrasonic sensor is controlled to transmit the first ultrasonic signal of the first transmission frequency for fingerprint identification. At this time, if the user's finger is blocked, the fingerprint can be identified, and the electronic device can be controlled according to the identified fingerprint information, such as turning on the screen, unlocking the display screen, and the like. If it is placed in a bag or otherwise blocked, the fingerprint will not be recognized. If the fingerprint cannot be recognized after a period of time, the method switches to control the ultrasonic sensor to transmit the second ultrasonic signal at the second transmission frequency, so as to reduce the power consumption.

One of the usage scenarios is that the fingerprint icon (lighting up part or all of the display screen) lights up under the screen to remind the user of the location of the fingerprint identification, and the proximity function (controlling the ultrasonic sensor to emit a second ultrasonic signal with a second transmission frequency) determines the location of the user's fingerprint. Is there an object blocking it. When there is no blockage, the G-Sensor can be used to determine whether the electronic device is shaking. If there is shaking, it means that the user is about to operate the electronic device. The fingerprint icon lights up for the user to unlock the fingerprint. At the same time, the ultrasonic sensor is controlled to transmit the first ultrasonic signal of the first transmission frequency; When there is no shaking, even if the electronic device is not blocked, it means that the user is not operating the mobile phone, and the fingerprint icon is not lit to save the power consumption of the display screen. When there is a block, it indicates that the electronic device may be in the user's pocket or in an inoperable place, and the fingerprint icon will not light up, saving the power consumption of the display screen. In some embodiments, the method further includes:

controlling the ultrasonic sensor to transmit a third ultrasonic signal at a third transmitting frequency, the third transmitting frequency is lower than the first transmitting frequency, and the third transmitting frequency is greater than the second transmitting frequency;

A third reflection signal of the third ultrasonic signal reflected by the obstacle is received, and a user contact state is acquired according to the third reflection signal.

Usually, the ultrasonic sensor can be controlled to transmit a third ultrasonic signal at a third transmission frequency, the third transmission frequency is located between the first transmission frequency and the second transmission frequency, and the third transmission through the third transmission frequency of the third ultrasonic signal is transmitted. The signal acquires the user's contact state, and the contact state may include holding state and relative position information with the user. After getting the holding state and relative position information, you can control the display direction of the display (horizontal or vertical, horizontal or vertical), and select the working antenna according to the holding state (choose the one that is not blocked by the holding. antenna) etc.

In some embodiments, after acquiring the user contact state according to the third reflected signal, the method further includes:

determining the location of the collected fingerprint according to the contact state;

Obtain the corresponding first ultrasonic sensor according to the collected fingerprint position;

The controlling the ultrasonic sensor to transmit the first ultrasonic signal at the first transmission frequency includes:

The first ultrasonic sensor is controlled to transmit a first ultrasonic signal at a first transmission frequency.

After obtaining the user's contact state, the position where the user contacts the electronic device can be obtained, and the position where the finger contacts the electronic device can be obtained, so as to determine the position of the collected fingerprint, such as the middle area of the display screen, and then obtain the corresponding first fingerprint according to the collected fingerprint position. For an ultrasonic sensor, for example, the ultrasonic sensor corresponding to the middle area of the display screen is set as the first ultrasonic sensor, and then the first ultrasonic sensor is controlled to transmit the first ultrasonic signal at the first transmission frequency to obtain fingerprint information. Ultrasonic sensors in other locations may not send and receive ultrasonic information, or they may transmit ultrasonic signals at the second or third transmission frequency to reduce power consumption and prevent other unwanted ultrasonic signals from interfering with fingerprint recognition.

In some embodiments, after acquiring the user contact state according to the third reflected signal, the method further includes:

Determine the relative positional relationship between the electronic device and the user according to the contact state;

Obtain the corresponding second ultrasonic sensor according to the relative positional relationship;

The control of the ultrasonic sensor to transmit the second ultrasonic signal of the second transmission frequency includes:

The second ultrasonic sensor is controlled to transmit a second ultrasonic signal at a second transmission frequency.

After obtaining the user's contact state, the relative position of the user and the electronic device and the user can be obtained, and the relative position of the user's face and the electronic device can be obtained, so as to determine the position where the distance information is obtained, such as the top area of the display screen, and then according to the relative position or the position of the electronic device. Obtain the corresponding second ultrasonic sensor at the location where the distance information is obtained. For example, set the ultrasonic sensor corresponding to the top area of the display screen as the second ultrasonic sensor, and then control the second ultrasonic sensor to transmit the second ultrasonic signal at the second transmission frequency to obtain the distance. information. Ultrasonic sensors in other locations can not send and receive ultrasonic information, reduce power consumption, and prevent other unwanted ultrasonic signals from interfering with fingerprint recognition. Of course, ultrasonic sensors in other locations can also transmit ultrasonic signals at the first transmission frequency or the third transmission frequency to achieve other functions, such as assisting in identifying distance information, and determining whether the user is a legitimate user through fingerprint recognition.

Therefore, in the ultrasonic processing method provided by the embodiments of the present application, the same ultrasonic sensor can be used to realize the function of distance detection and the function of fingerprint recognition. In addition, the ultrasonic sensor can be arranged under the display screen. When the ultrasonic sensor realizes distance detection and fingerprint recognition, it is detected and recognized by the ultrasonic signal. The ultrasonic signal can pass through the display screen, so that the display screen does not need to be an ultrasonic sensor. Setting the non-display area separately means that the occupation of the non-display area of the display screen by the ultrasonic sensor can be reduced, so the screen ratio of the display screen can be increased.

In addition, the higher the frequency of the ultrasonic signal, the shorter the wavelength, the better the straight-line propagation, the less likely it will be diffracted when it touches an obstacle, and the greater the loss during transmission in the medium. Correspondingly, the smaller the frequency of the ultrasonic signal, the longer the wavelength, the worse the straight-line propagation, the diffraction is relatively easy to occur when it touches the obstacle, and the loss is relatively small when it is transmitted in the medium. The ultrasonic frequency is high, and it is easy to be attenuated in the air, but the straight line propagation is good. The transmitted signal only needs to reach the fingerprint in contact with the screen. After the fingerprint is reflected, it is received by the ultrasonic sensor without the influence of the air layer in the middle. The ultrasonic frequency is low and can be transmitted in the air, but due to poor linear transmission, the image of the object cannot be obtained, and only the presence or absence of the reflected signal of the occluded object can be judged, so as to realize the function of distance information acquisition or proximity function. In the first mode, that is, when the target fingerprint information needs to be acquired, the ultrasonic sensor is controlled to transmit a first ultrasonic signal at a high frequency (a first transmission frequency).

It should be noted that, in the above-mentioned embodiment, the ultrasonic sensor can not only be arranged below the display screen, but also can be arranged in the display screen, and can also be arranged on the back cover and the side of the electronic device.

In the description of this application, it should be understood that terms such as "first", "second" and the like are only used to distinguish similar objects, and cannot be interpreted as indicating or implying relative importance or implying the indicated technology number of features.

During specific implementation, the present application is not limited by the execution order of the described steps, and certain steps may also be performed in other sequences or simultaneously under the condition of no conflict.

The embodiment of the present application further provides an ultrasonic processing device, and the ultrasonic processing device can be integrated into the above electronic device. Referring to FIG. 3 , FIG. 3 is a schematic structural diagram of an ultrasonic processing apparatus provided by an embodiment of the present application. Among them, the electronic equipment includes ultrasonic sensors. The ultrasonic processing apparatus 300 includes a first acquisition module 301 , a first transmission module 302 , a second acquisition module 303 , a second transmission module 304 and a third acquisition module 305 .

The first obtaining module 301 is used to obtain the current mode.

The first transmitting module 302 is configured to control the ultrasonic sensor to transmit a first ultrasonic signal of a first transmitting frequency if the current mode is the first mode.

The second acquisition module 303 is configured to receive a first reflected signal from the first ultrasonic signal reflected by an obstacle, and acquire target fingerprint information according to the first reflected signal.

The second transmitting module 304 is configured to, if the current mode is the second mode, control the ultrasonic sensor to transmit a second ultrasonic signal with a second transmitting frequency, where the second transmitting frequency is lower than the first transmitting frequency.

The third acquiring module 305 is configured to receive a second reflection signal reflected from the second ultrasonic signal by the obstacle, and acquire target distance information according to the second reflection signal.

In some embodiments, the first obtaining module 301 is further configured to obtain the information called by the current application; if the information called by the current application is fingerprint information, the current mode is determined to be the first mode; if the information called by the current application is the fingerprint information, the current mode is determined to be the first mode; is the distance information, then it is determined that the current mode is the second mode.

In some embodiments, the ultrasonic treatment device further includes a control module. The first obtaining module 301 is further configured to determine that the current mode is the second mode if the screen is currently in an off-screen state.

The control module is used to judge whether the display screen of the electronic device is blocked by an object according to the distance information; if there is no block, display fingerprint prompt information in the first area of the display screen of the electronic device; When the device shakes, the ultrasonic sensor is controlled to transmit the first ultrasonic signal of the first transmission frequency.

In some embodiments, the control module is further configured to control the ultrasonic sensor to transmit a first ultrasonic signal with a first transmission frequency if there is a block; and to receive a first reflection of the first ultrasonic signal reflected by an obstacle. signal, and determine whether the target fingerprint information is obtained according to the first reflected signal; if the target fingerprint information is obtained, control the display screen of the electronic device to turn on the screen; if the target fingerprint information is not obtained, then The ultrasonic sensor is controlled to transmit a second ultrasonic signal at a second transmission frequency.

In some embodiments, the ultrasonic processing apparatus further includes a third transmitting module and a third acquiring module.

The third transmitting module is used to control the ultrasonic sensor to transmit a third ultrasonic signal at a third transmitting frequency, the third transmitting frequency is lower than the first transmitting frequency, and the third transmitting frequency is greater than the second transmitting frequency.

The third acquisition module is configured to receive a third reflection signal of the third ultrasonic signal reflected by the obstacle, and acquire a user contact state according to the third reflection signal.

In some embodiments, the third acquiring module is further configured to determine the location of the collected fingerprint according to the contact state; and acquire the corresponding first ultrasonic sensor according to the location of the collected fingerprint.

The first transmitting module is further configured to control the first ultrasonic sensor to transmit a first ultrasonic signal at a first transmitting frequency.

In some embodiments, the third obtaining module is further configured to determine the relative positional relationship between the electronic device and the user according to the contact state; and obtain the corresponding second ultrasonic sensor according to the relative positional relationship.

The second transmitting module is further configured to control the second ultrasonic sensor to transmit a second ultrasonic signal at a second transmitting frequency.

For the specific implementation of the ultrasonic treatment device, reference may be made to the above-mentioned embodiments, which will not be repeated here.

Referring to FIG. 4 , FIG. 4 is a schematic diagram of a first structure of an electronic device provided by an embodiment of the present application.

The electronic device 300 includes a processor 310 and a memory 320 . The processor 310 is electrically connected to the memory 320 .

The processor 310 is the control center of the electronic device 300, uses various interfaces and lines to connect various parts of the entire electronic device, executes the electronic device by running or calling the computer program stored in the memory 320, and calling the data stored in the memory 320. Various functions of the device and processing data, so as to carry out the overall monitoring of the electronic device.

In this embodiment, the processor 310 in the electronic device 300 loads the instructions corresponding to the processes of one or more computer programs into the memory 320 according to the following steps, and is executed by the processor 310 and stored in the memory 320 computer program that performs the following steps:

get the current mode;

If the current mode is the first mode, controlling the ultrasonic sensor to transmit the first ultrasonic signal of the first transmission frequency;

receiving the first reflection signal reflected by the first ultrasonic signal from the obstacle, and obtaining target fingerprint information according to the first reflection signal;

If the current mode is the second mode, the ultrasonic sensor is controlled to transmit a second ultrasonic signal with a second transmission frequency, and the second transmission frequency is lower than the first transmission frequency;

A second reflected signal reflected by the second ultrasonic signal from the obstacle is received, and target distance information is acquired according to the second reflected signal.

In some embodiments, when obtaining the current mode, the processor 310 performs the following steps:

Get the information called by the current application;

If the information called by the current application is fingerprint information, then determine that the current mode is the first mode;

If the information called by the current application is the distance information, it is determined that the current mode is the second mode.

In some embodiments, when obtaining the current mode, the processor 310 performs the following steps:

If it is currently in an off-screen state, determining that the current mode is the second mode;

After obtaining the target distance information according to the second reflected signal, the method further includes:

Determine whether the display screen of the electronic device is blocked by an object according to the distance information;

If there is no obstruction, the fingerprint prompt information is displayed in the first area of the display screen of the electronic device;

If it is detected that the electronic device is shaking, the ultrasonic sensor is controlled to transmit a first ultrasonic signal of a first transmission frequency.

In some embodiments, after judging whether the display screen of the electronic device is blocked by an object according to the distance information, the processor 310 performs the following steps:

If it is blocked, control the ultrasonic sensor to transmit the first ultrasonic signal of the first transmission frequency;

Receive the first reflection signal of the first ultrasonic signal reflected by the obstacle, and determine whether the target fingerprint information is acquired according to the first reflection signal;

If the target fingerprint information is obtained, controlling the display screen of the electronic device to turn on the screen;

If the target fingerprint information is not acquired, the ultrasonic sensor is controlled to transmit a second ultrasonic signal at a second transmission frequency.

In some embodiments, the processor 310 performs the following steps:

controlling the ultrasonic sensor to transmit a third ultrasonic signal at a third transmitting frequency, the third transmitting frequency is lower than the first transmitting frequency, and the third transmitting frequency is greater than the second transmitting frequency;

A third reflection signal of the third ultrasonic signal reflected by the obstacle is received, and a user contact state is acquired according to the third reflection signal.

In some embodiments, after acquiring the user contact state according to the third reflected signal, the processor 310 performs the following steps:

determining the location of the collected fingerprint according to the contact state;

Obtain the corresponding first ultrasonic sensor according to the collected fingerprint position;

The first ultrasonic sensor is controlled to transmit a first ultrasonic signal at a first transmission frequency.

In some embodiments, after acquiring the user contact state according to the third reflected signal, the processor 310 performs the following steps:

Determine the relative positional relationship between the electronic device and the user according to the contact state;

Obtain the corresponding second ultrasonic sensor according to the relative positional relationship;

The second ultrasonic sensor is controlled to transmit a second ultrasonic signal at a second transmission frequency.

Memory 320 may be used to store computer programs and data. The computer program stored in the memory 320 contains instructions executable in the processor. A computer program can be composed of various functional modules. The processor 310 executes various functional applications and data processing by calling computer programs stored in the memory 320 .

Referring to FIG. 5 and FIG. 6 , FIG. 5 is a schematic diagram of a second structure of an electronic device provided by an embodiment of the present application, and FIG. 6 is a cross-sectional view of the electronic device shown in FIG. 5 along a direction P1-P1.

The electronic device 100 may specifically include a display screen 10 , an ultrasonic sensor 20 , a middle frame 30 , a circuit board 40 , a battery 50 and a back cover 60 .

The display screen 10 may be installed on the middle frame 30 and connected to the back cover 60 through the middle frame 30 to form a display surface of the electronic device 100 for displaying images, texts and other information. The display screen 10 may include a liquid crystal display (Liquid Crystal Display, LCD) or an organic light-emitting diode display (Organic Light-Emitting Diode, OLED).

It can be understood that a cover plate may also be provided on the display screen 10 . The cover plate covers the display screen 10 to protect the display screen 10 and prevent the display screen 10 from being scratched or damaged by water. The cover plate may be a transparent glass cover plate, so that the user can observe the information displayed on the display screen 10 through the cover plate. For example, the cover plate may be a glass cover plate made of sapphire.

The ultrasonic sensor 20 can be arranged at the bottom of the display screen 10 and mounted on the middle frame 30 . That is, the ultrasonic sensor 20 is disposed on the side away from the display surface of the display screen 10 . The display surface of the display screen 10 is the side facing the user when the display screen 10 displays information.

The ultrasonic sensor 20 is used to realize the distance detection function of the electronic device 100 and the fingerprint recognition function of the electronic device 100 . Wherein, the ultrasonic sensor 20 can transmit ultrasonic signals. The ultrasonic signal passes through the display screen 10 so as to contact an obstacle (such as the user's face) and generate a reflected signal. The ultrasonic sensor 20 receives the reflected signal, and according to the intensity of the reflected signal, the transmitted ultrasonic signal and the received ultrasonic signal are transmitted. The time difference of the reflected signals can detect the distance of the obstacle from the electronic device 100 . On the other hand, when the electronic device needs to perform fingerprint recognition, the ultrasonic signal passes through the display screen 10 to contact the user's finger, and different parts of the fingerprint pattern on the user's finger reflect to generate different reflected signals, which are received by the ultrasonic sensor 20. The reflected signal is used to obtain a fingerprint image of the user's finger according to the reflected signal, so that fingerprint identification can be performed.

The middle frame 30 may have a thin plate-like or sheet-like structure, or a hollow frame structure. The middle frame 30 is used to provide support for the electronic components or functional components in the electronic device 100 so as to mount the electronic components and functional components in the electronic device 100 together.

Wherein, the middle frame 30 and the back cover 60 may jointly form a casing of the electronic device 100 for accommodating or installing electronic components, functional components and the like of the electronic device. For example, the display screen 10 may be mounted on the housing, and the ultrasonic sensor 20 may be mounted in the housing. In addition, functional components such as cameras, receivers, circuit boards, and batteries of the electronic device can be mounted on the middle frame 30 for fixing. It can be understood that the material of the middle frame 30 may include metal or plastic.

The circuit board 40 may be mounted on the middle frame 30 . The circuit board 40 may be the main board of the electronic device 100 . The circuit board 40 may be integrated with one or more functional components such as a microphone, a speaker, a receiver, an earphone interface, a camera, an acceleration sensor, a gyroscope, and a processor. Meanwhile, the display screen 10 may be electrically connected to the circuit board 40 to control the display of the display screen 10 through the processor on the circuit board 40 .

The battery 50 may be installed on the middle frame 30 . Meanwhile, the battery 50 is electrically connected to the circuit board 40 , so that the battery 50 can supply power to the electronic device 100 . The circuit board 40 may be provided with a power management circuit. The power management circuit is used to distribute the voltage provided by the battery 50 to various electronic components in the electronic device 100 .

The back cover 60 may be integrally formed. During the molding process of the back cover 60 , structures such as a rear camera hole may be formed on the back cover 60 .

Referring to FIG. 7 , FIG. 7 is a schematic diagram of a first structure of an ultrasonic sensor provided by an embodiment of the present application.

Among them, the ultrasonic sensor 20 includes a piezoelectric material layer 21 and an electrode layer 22 which are arranged in layers.

The piezoelectric material layer 21 can generate ultrasonic signals when a voltage is applied, and emit ultrasonic signals to the outside. The voltage applied to the piezoelectric material layer 21 can be, for example, a driving signal. It can be understood that the driving signal is a high-frequency alternating current signal. The material of the piezoelectric material layer 21 may include piezoelectric ceramics, for example. That is, the piezoelectric material layer 21 may be a layered structure formed of piezoelectric ceramics.

The piezoelectric material layer 21 can transmit the first ultrasonic signal of the first transmission frequency and the second ultrasonic signal of the second transmission frequency in time division. That is, the same piezoelectric material 21 transmits the first ultrasonic signal of the first transmission frequency at the first time, and transmits the second ultrasonic signal of the second transmission frequency at the second time. The piezoelectric material layer 21 may also include adjacent first regions 21A and second regions 21B. The first area 21A is used to transmit ultrasonic signals of a first transmission frequency, and the second area 21B is used to transmit ultrasonic signals of a second transmission frequency. Wherein, the first transmission frequency is greater than the second transmission frequency. The ultrasonic signal of the first transmission frequency is used to pass through the display screen 10 of the electronic device 100 to realize the fingerprint recognition function of the electronic device 100 , and the ultrasonic signal of the second transmission frequency is used to pass through the display screen 10 of the electronic device 100 Thus, the distance detection function of the electronic device 100 is realized.

Therefore, the ultrasonic sensor 20 provided in the embodiment of the present application can realize the function of distance detection and the function of fingerprint identification at the same time. In addition, when the ultrasonic sensor 20 realizes distance detection and fingerprint recognition, it is detected and recognized by ultrasonic signals, and the ultrasonic signals can pass through the display screen, so that there is no need to separately set a non-display area for the ultrasonic sensor 20 on the display screen. That is, the occupation of the non-display area of the display screen by the ultrasonic sensor 20 can be reduced, so that the screen ratio of the display screen can be increased.

It should be noted that the higher the frequency of the ultrasonic signal, the shorter the wavelength, the better the straight-line propagation, the less likely the diffraction will occur when it touches the obstacle, and the greater the loss during transmission in the medium. Correspondingly, the smaller the frequency of the ultrasonic signal, the longer the wavelength, the worse the straight-line propagation, the diffraction is relatively easy to occur when it touches the obstacle, and the loss is relatively small when it is transmitted in the medium.

When the electronic device performs distance detection, that is, when detecting the distance between an obstacle (such as a face) and the electronic device, usually the obstacle and the electronic device are not in direct contact, that is, the distance between the obstacle and the electronic device is relatively small. Far. After the ultrasonic signal emitted by the ultrasonic sensor 20 passes through the display screen 10, it needs to travel a certain distance in the air before it touches the obstacle. In order to reduce the loss caused when the ultrasonic signal is transmitted in the air, the frequency of the ultrasonic signal used for distance detection is set to be relatively small, that is, the first emission frequency is relatively small.

Wherein, the range of the first transmission frequency may be greater than 10 MHz. For example, the first transmit frequency may be 12MHz. The range of the second transmit frequency may be between 20KHz and 1MHz, that is, the second transmit frequency is greater than 20KHz and less than 1MHz. For example, the second transmission frequency may be 60KHz. It should be noted that the above numerical values are only illustrative examples, and the above specific numerical values can be adjusted as required in the embodiments of the present application.

When the electronic device performs fingerprint identification, usually the user's finger is in direct contact with the electronic device, for example, the user's finger contacts or presses on the display screen 10 , that is, the distance between the user's finger and the electronic device is relatively close. The ultrasonic signal emitted by the ultrasonic sensor 20 can directly contact the user's finger after passing through the display screen 10, and does not need to be transmitted in the air. At this time, the loss of the ultrasonic signal during the entire transmission process is relatively small. In order to improve the accuracy of collecting the user's fingerprint image, that is, to improve the clarity of the collected fingerprint image, the diffraction of the ultrasonic signal when it contacts the user's finger can be minimized. Therefore, the frequency of the ultrasonic signal used for fingerprint recognition is relatively set. larger, that is, the second transmission frequency is larger.

It can be understood that the scenario where the electronic device 100 needs to perform distance detection is usually a call scenario. For example, when the electronic device 100 is in a scenario of making a phone call, a voice call, or a voice playing a message, it is usually necessary to detect the distance between the obstacle and the electronic device 100 to prevent the electronic device 100 from being mistakenly touched by the obstacle. operate. In these call scenarios, it is necessary to transmit sound signals to the outside through the receiver or the speaker of the electronic device 100 . In an electronic device, sound-generating components such as a receiver and a speaker are usually arranged at the end of the electronic device. For example, the receiver may be provided at the top end of the electronic device 100 , and the speaker may be provided at the bottom end of the electronic device 100 . That is to say, it can be understood that the part where the electronic device transmits the sound signal is relatively fixed, and is usually located at the end of the electronic device, and when the user listens to the sound signal transmitted by the electronic device, the ear or face naturally near the end of the electronic device.

In order to accurately detect the distance between an obstacle (user's ear or face) and the electronic device 100 when the electronic device 100 is in a call scene, the detection part for distance detection may also be set at the end of the electronic device 100 .

Therefore, in the ultrasonic sensor 20 , the first region 21A of the piezoelectric material layer 21 may be located at one end of the piezoelectric material layer 21 . For example, as shown in FIG. 7 , the first region 21A is located at the end of the piezoelectric material layer 21 . It can be understood that FIG. 7 is only a schematic diagram. In terms of the position of the ultrasonic sensor 20 in the electronic device 100 when the electronic device 100 is placed vertically, the first region 21A may be located in the piezoelectric material layer 21 the top or bottom of the .

In addition, since the part where the electronic device transmits the sound signal to the outside is relatively fixed and is usually located at the end of the electronic device, the area occupied by the part where the electronic device transmits the sound signal to the outside is also relatively small. When the electronic device performs fingerprint recognition, the position where the user touches or presses on the display screen of the electronic device is not fixed, and the area on the display screen that supports the user to touch or press is large, so the area for fingerprint recognition on the electronic device is large. Need to cover a larger area.

Therefore, in the ultrasonic sensor 20, the area of the first region 21A of the piezoelectric material 21 is larger than the area of the second region 21B. Therefore, the ultrasonic sensor 20 can realize fingerprint recognition in a relatively fixed range through the first area 21A, and can realize distance detection in a relatively small range through the second area 21B.

Continue to refer to FIG. 7 , wherein the electrode layer 22 is connected to the piezoelectric material layer 21 . For example, the electrode layer 22 and the piezoelectric material layer 21 can be stacked and connected.

Wherein, the electrode layer 22 is used to apply a driving signal to the piezoelectric material layer 21 to drive the first region 21A of the piezoelectric material layer 21 to emit ultrasonic signals of a first emission frequency, and to drive the piezoelectric material layer 21 The second region 21B of the material layer 21 emits ultrasonic signals of the second transmission frequency. Wherein, the driving signal may be a high-frequency alternating current signal, such as a high-frequency pulse signal. The first transmission frequency is greater than the second transmission frequency.

It can be understood that the electrode layer 22 may include two electrode layers spaced apart from each other, such as a positive electrode layer and a negative electrode layer.

Referring to FIG. 8 , FIG. 8 is a schematic diagram of a second structure of an ultrasonic sensor provided by an embodiment of the present application.

The electrode layer 22 includes a first electrode layer 221 and a second electrode layer 222 arranged at intervals. The first electrode layer 221 is disposed on one side of the piezoelectric material layer 21 and connected to the piezoelectric material layer 21 . The second electrode layer 222 is disposed on the other side of the piezoelectric material layer 21 and connected to the piezoelectric material layer 21 .

The first electrode layer 221 and the second electrode layer 222 constitute two electrodes of the piezoelectric material layer 21 . For example, the first electrode layer 221 may be a positive electrode layer of the piezoelectric material layer 21 , and the second electrode layer 222 may be a negative electrode layer of the piezoelectric material layer 21 . It can be understood that the functions of the first electrode layer 221 and the second electrode layer 222 can also be interchanged, that is, the first electrode layer 221 is the negative electrode layer of the piezoelectric material layer 21 , and the The second electrode layer 222 is the positive electrode layer of the piezoelectric material 21 .

The first electrode layer 221 and the second electrode layer 222 are used to jointly apply a driving signal to the piezoelectric material layer 21 . For example, the first electrode layer 221 and the second electrode layer 222 may have different potentials to form a potential difference on the piezoelectric material layer 21 , so that a driving signal may be applied to the piezoelectric material layer 21 .

It should be noted that, when the piezoelectric material layer 21 is driven by a driving signal to emit an ultrasonic signal, the frequency of the emitted ultrasonic signal is the same as the frequency of the driving signal. That is, depending on the frequency of the driving signal applied to the piezoelectric material layer 21 , the frequency of the ultrasonic signal emitted by the piezoelectric material layer 21 is the same.

Therefore, in order to drive different regions of the piezoelectric material layer 21 to emit ultrasonic signals of different frequencies, driving signals of different frequencies may be applied to different regions of the piezoelectric material layer 21 .

Wherein, the first electrode layer 221 can be set as an equipotential layer. That is, the potential of any position of the first electrode layer 221 is the same.

The second electrode layer 222 includes adjacent first electrode regions 222A and second electrode regions 222B.

The first electrode region 222A is disposed opposite to the first region 21A of the piezoelectric material layer 21 , and the first electrode region 222A is connected to the first region 21A of the piezoelectric material 21 . The first electrode region 222A and the first electrode layer 221 are used to jointly apply a driving signal of a first emission frequency to the first region 21A of the piezoelectric material layer 21, so as to drive the first region 21A to emit the emitted signal. The ultrasonic signal of the first transmission frequency is described. For example, the first electrode region 222A and the first electrode layer 221 may be used to jointly apply a driving signal of 12 MHz to the first region 21A of the piezoelectric material layer 21 .

The second electrode region 222B is disposed opposite to the second region 21B of the piezoelectric material layer 21 , and the second electrode region 222B is connected to the second region 21B of the piezoelectric material 21 . The second electrode region 222B and the first electrode layer 221 are used to jointly apply a driving signal of a second emission frequency to the second region 21B of the piezoelectric material layer 21, so as to drive the second region 21B to emit the emitted signal. the ultrasonic signal of the second transmission frequency. For example, the second electrode region 222B and the first electrode layer 221 may be used to jointly apply a 60KHz driving signal to the second region 21B of the piezoelectric material layer 21 .

Referring to FIG. 9 , FIG. 9 is a schematic structural diagram of a second electrode layer in an ultrasonic sensor provided by an embodiment of the present application.

It can be understood that the second electrode layer 222 may include a plurality of electrodes that are electrically insulated from each other. Each of the electrodes is connected to a point on the piezoelectric material layer 21 to drive the point connected to the electrode to vibrate to generate ultrasonic signals.

The first electrode region 222A of the second electrode layer 222 includes a plurality of first electrodes 2221 that are electrically insulated from each other. Each of the first electrodes 2221 is connected to the first region 21A of the piezoelectric material layer 21 . For example, each of the first electrodes 2221 is connected to a point in the first area 21A to drive the connected point in the first area 21A to vibrate to generate ultrasonic signals.

The second electrode region 222B of the second electrode layer 222 includes a plurality of second electrodes 2222 that are electrically insulated from each other. Each of the second electrodes 2222 is connected to the second region 21B of the piezoelectric material layer 21 . For example, each of the second electrodes 2222 is connected to a point in the second area 21B to drive the connected point in the second area 21B to vibrate to generate ultrasonic signals.

Referring to FIG. 10 , FIG. 10 is a schematic structural diagram of a first electrode layer in an ultrasonic sensor provided by an embodiment of the present application.

It can be understood that the first electrode layer 221 may also include a plurality of electrodes that are electrically insulated from each other. For example, as shown in FIG. 10 , the first electrode layer 221 includes a plurality of third electrodes 2211 that are electrically insulated from each other. Each of the third electrodes 2211 is connected to the piezoelectric material layer 21 . Wherein, the potentials of the plurality of third electrodes 2211 are equal, so that the first electrode layer 221 can be formed as an equipotential layer.

Wherein, in the ultrasonic sensor 20 , each third electrode 2211 on the first electrode layer 221 is opposite to the position of one first electrode 2221 on the second electrode layer 222 , or is opposite to the position of one second electrode 2222 . Each third electrode 2211 and a first electrode 2221 and the part of the piezoelectric material layer 21 between the third electrode 2211 and the first electrode 2221 can be understood as an ultrasonic sensor pixel. Each third electrode 2211 and one second electrode 2222 and the portion of the piezoelectric material layer 21 located between the third electrode 2211 and the second electrode 2222 can also be understood as an ultrasonic sensor pixel. That is, each ultrasonic sensor pixel includes a part of the piezoelectric material layer 21 , a third electrode 2211 connected to the part, and a first electrode 2221 or a second electrode 2222 connected to the part. Therefore, by controlling the potential of each third electrode 2211, each first electrode 2221, and each second electrode 2222, each ultrasonic sensor pixel can be controlled.

It can be understood that the ultrasonic sensor 20 may also include a control chip. The control chip is connected to the electrode layer 22 of the ultrasonic sensor 20 . The control chip is used to control the driving signal applied by the electrode layer 22 to the piezoelectric material layer 21 .

Referring to FIG. 11 , FIG. 11 is a schematic diagram of a connection relationship between a control chip and a first electrode layer and a second electrode layer in an ultrasonic sensor provided by an embodiment of the present application.

The ultrasonic sensor 20 includes a control chip 23 . The control chip 23 is respectively connected with the first electrode layer 221 and the second electrode layer 222 in the electrode layer 22 .

For example, as shown in FIG. 11 , the control chip 23 is connected to each of the third electrodes ₂₂₁₁ on the first electrode layer 221 through lines such as x ₁ , x ₂ , x ₃ , . The potential of the third electrode 2211 is controlled. Wherein, it can be understood that each of the _lines such as x ₁ , x ₂ , x ₃ , . the number of lines in between. The lines can be printed conductors, for example.

Similarly, the control chip 23 is connected to each of the first electrodes 2221 and each of the second electrodes ₂₂₂₂ on the second electrode layer 222 through lines such as y ₁ , y ₂ , y ₃ , . The potential of each of the first electrodes 2221 and each of the second electrodes 2222 is controlled. Wherein, it can be understood that each of the lines such as y ₁ , y ₂ , y ₃ , ..., y _j can be connected to a plurality of first electrodes 2221 or a plurality of second electrodes 2222 simultaneously, thereby The number of lines between the control chip 23 and the second electrode layer 222 can be reduced. The lines can also be printed conductors.

It can be understood that, in the above electronic device 100, the display screen 10 and the ultrasonic sensor 20 can be integrated together. That is, the ultrasonic sensor 20 may be integrated in the display screen 10 .

Referring to FIG. 12 and FIG. 13 , FIG. 12 is a schematic diagram of a second structure of the electronic device provided by the embodiment of the application, and FIG. 13 is a cross-sectional view of the electronic device shown in FIG. 12 along the P2-P2 direction.

The electronic device 100 includes a display screen 10 , a middle frame 30 , a circuit board 40 , a battery 50 and a back cover 60 . An ultrasonic sensor is integrated in the display screen 10 .

Only the differences between the display screen 10 and the display screen 10 of the electronic device 100 shown in FIG. 5 will be described below, and the similarities can be referred to the above descriptions, which will not be repeated here. The middle frame 30 , the circuit board 40 , the battery 50 and the back cover 60 can also refer to the above descriptions, which will not be repeated here.

Referring to FIG. 14 , FIG. 14 is a schematic diagram of a first structure of the display screen 10 provided by the embodiment of the present application.

Wherein, the display screen 10 includes a first substrate layer 11 , a display layer 12 , a piezoelectric material layer 13 , an electrode layer 14 and a second substrate layer 15 that are stacked.

The second substrate layer 15 is disposed on one side of the first substrate layer 11 . The second substrate layer 15 and the first substrate layer 11 form two substrates of the display screen 10 , such as an upper substrate and a lower substrate. The second substrate layer 15 and the first substrate layer 11 provide support and protection for the display layer 12 , the piezoelectric material layer 13 and the electrode layer 14 .

The first substrate layer 11 may be, for example, a glass substrate, and the second substrate layer 15 may be, for example, a glass substrate.

The display layer 12 is disposed between the first substrate layer 11 and the second substrate layer 15 . The display layer 12 is used for displaying information, such as displaying images, texts and other information, so as to realize the display function of the display screen 10 .

Wherein, the display screen 10 may be a liquid crystal display screen. At this time, the display layer 12 includes liquid crystal, or it is understood that the display layer 12 is a liquid crystal layer. The display screen 10 can also be an organic light emitting diode display screen. At this time, the display layer 12 includes an organic light-emitting layer, or it is understood that the display layer 12 is an organic light-emitting layer.

The piezoelectric material layer 13 is disposed between the first substrate layer 11 and the second substrate layer 15 . The piezoelectric material layer 13 is used for transmitting ultrasonic signals of the first transmission frequency and ultrasonic signals of the second transmission frequency. The ultrasonic signal of the first transmission frequency is used to transmit at least the first substrate layer 11 or the second substrate layer 15 to realize distance detection. The ultrasonic signal of the second transmission frequency is used to pass through at least the first substrate layer 11 or the second substrate layer 15 to realize fingerprint identification.

For example, when the display screen 10 displays information, if the first substrate layer 11 is the side facing the user, the ultrasonic signal of the first emission frequency passes through the first substrate layer 11 to realize distance detection, The ultrasonic signal of the second transmission frequency is transmitted through the first substrate layer 11 to realize fingerprint identification; if the second substrate layer 15 is the side facing the user, the ultrasonic signal of the first transmission frequency is transmitted through the first substrate layer 15 . The second substrate layer 15 is used to realize distance detection, and the ultrasonic signal of the second transmission frequency is transmitted through the second substrate layer 15 to realize fingerprint recognition.

For the specific structure and function of the piezoelectric material layer 13 , reference may be made to the description of the piezoelectric material layer 21 in the ultrasonic sensor 20 above, which will not be repeated here.

Wherein, when the first region of the piezoelectric material layer 13 is located at one end of the piezoelectric material layer 13 , the orthographic projection of the first region on the display layer 12 is located at one end of the display layer 12 department.

The electrode layer 14 is disposed between the first substrate layer 11 and the second substrate layer 15 . The specific structure, function and relationship between the electrode layer 14 and the piezoelectric material layer 13 can be referred to the description of the electrode layer 22 in the ultrasonic sensor 20 above, which will not be repeated here.

Referring to FIG. 15 , FIG. 15 is a schematic diagram of a second structure of a display screen provided by an embodiment of the present application.

It can be understood that the electrode layer 14 may include a first electrode layer 141 and a second electrode layer 142 . The first electrode layer 141 is disposed between the first substrate layer 11 and the display layer 12, the second electrode layer 142 is disposed between the display layer 12 and the second substrate layer 15, and the piezoelectric material layer 13 is disposed between the display layer 12 and the second electrode layer 142 .

When the display screen 10 displays information, if the first substrate layer 11 is the side facing the user, the ultrasonic signal of the first emission frequency passes through the display layer 12 , the first electrode layer 141 and the The first substrate layer 11 is used for distance detection, and the ultrasonic signal of the second emission frequency is transmitted through the display layer 12 , the first electrode layer 141 and the first substrate layer 11 to realize fingerprint recognition.

When the display screen 10 displays information, if the second substrate layer 15 is the side facing the user, the ultrasonic signal of the first emission frequency will pass through the second electrode layer 142 and the second substrate layer 15 to realize distance detection, and the ultrasonic signal of the second transmission frequency passes through the second electrode layer 142 and the second substrate layer 15 to realize fingerprint identification.

Wherein, the first electrode layer 141 can refer to the description of the first electrode layer 221 in the ultrasonic sensor 20 above, and the second electrode layer 142 can refer to the description of the second electrode layer 222 in the ultrasonic sensor 20 above. description, which will not be repeated here.

It can be understood that the arrangement positions of the display layer 12 and the piezoelectric material layer 13 in the display screen 10 can also be interchanged.

Referring to FIG. 16 , FIG. 16 is a schematic diagram of a third structure of a display screen provided by an embodiment of the present application.

The first electrode layer 141 is disposed between the first substrate layer 11 and the display layer 12, the second electrode layer 142 is disposed between the display layer 12 and the second substrate layer 15, and the piezoelectric material layer 13 is provided between the first electrode layer 141 and the display layer 12 .

When the display screen 10 displays information, if the first substrate layer 11 is the side facing the user, the ultrasonic signal of the first emission frequency will pass through the first electrode layer 141 and the first substrate layer. 11 to realize distance detection, and the ultrasonic signal of the second transmission frequency passes through the first electrode layer 141 and the first substrate layer 11 to realize fingerprint identification.

When the display screen 10 displays information, if the second substrate layer 15 is the side facing the user, the ultrasonic signal of the first emission frequency passes through the display layer 12 , the second electrode layer 142 and the The second substrate layer 15 is used for distance detection, and the ultrasonic signal of the second emission frequency is transmitted through the display layer 12 , the second electrode layer 142 and the second substrate layer 15 to realize fingerprint recognition.

The display screen 10 provided by the embodiment of the present application can realize the function of distance detection and the function of fingerprint identification at the same time. In addition, when the display screen 10 realizes distance detection and fingerprint recognition, it is detected and recognized by ultrasonic signals, and the ultrasonic signals can pass through the display screen 10, so that there is no need to separately set a non-display area on the display screen 10, that is, the display screen can be reduced. Therefore, the screen ratio of the display screen can be increased.

Referring to FIG. 17 , FIG. 17 is a schematic diagram of an application scenario of distance detection performed by an electronic device according to an embodiment of the present application.

Wherein, when the electronic device needs to perform distance detection, for example, when the electronic device is in a scene of making a phone call, a scene of a voice call, or a scene of playing a message by voice, the electronic device controls the piezoelectric material layer 21 in the above-mentioned ultrasonic sensor 20 or the above-mentioned display screen 10. The piezoelectric material layer 13 emits ultrasonic signals of the first transmission frequency. When the ultrasonic signal touches an obstacle (such as a user's face), a reflected signal is generated, and the reflected signal is transmitted to the electronic device and received by the piezoelectric material layer. The electronic device can detect the distance between the obstacle and the electronic device according to the strength of the received reflected signal. Alternatively, the electronic device can also obtain the distance between the obstacle and the electronic device according to the time interval between the first time when the ultrasonic signal is transmitted and the second time when the reflected signal is received, and the transmission speed of the ultrasonic signal.

Referring to FIG. 18 and FIG. 19 , FIG. 18 is a schematic diagram of an application scenario of fingerprint recognition performed by an electronic device provided by an embodiment of the present application, and FIG. 19 is a schematic schematic diagram of a principle of fingerprint recognition performed by an electronic device provided by an embodiment of the present application.

Wherein, when the user's finger touches or presses on the surface of the electronic device (such as the display screen surface), the electronic device controls the piezoelectric material layer 21 in the ultrasonic sensor 20 or the piezoelectric material layer 13 in the display screen 10 to emit a second emission frequency of the ultrasonic signal. When the ultrasonic signal touches the finger, it produces a reflected signal. The reflected signal is in turn received by the piezoelectric material layer. Then, the electronic device converts the received reflected signal into a corresponding electrical signal to obtain the fingerprint image of the user's finger.

It can be understood that there is a fingerprint pattern on the surface of the finger, and the fingerprint pattern is formed by uneven areas. Therefore, when different areas of the fingerprint pattern reflect the ultrasonic signal to form the reflected signal, the intensity of the reflected signal is different, and the intensity of the reflected signal received by the piezoelectric material layer from different parts of the finger is also different. Therefore, the electronic device can obtain the degree of concavity and convexity of different parts of the finger according to the reflected signal strength of different parts of the finger, and can form a three-dimensional fingerprint image of the user's finger.

For example, the deepest concave part in the fingerprint pattern can be called the fingerprint valley, and the highest convex part in the fingerprint pattern can be called the fingerprint ridge. When the user's finger reflects the ultrasonic signal to generate the reflected signal, the reflected signal strength generated by the fingerprint valley is the weakest, and the reflected signal strength generated by the fingerprint ridge is the strongest. The electronic device can identify the fingerprint valleys and fingerprint ridges on the finger according to the received reflected signal intensity generated by different parts of the finger.

Embodiments of the present application further provide a storage medium, where a computer program is stored in the storage medium, and when the computer program runs on a computer, the computer executes the ultrasonic fingerprint identification method described in any of the foregoing embodiments.

It should be noted that those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium , the storage medium may include, but is not limited to, a read only memory (ROM, Read Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and the like.

The ultrasonic processing method, device, storage medium, and electronic device provided by the embodiments of the present application have been described in detail above. The principles and implementations of the present application are described herein by using specific examples, and the descriptions of the above embodiments are only used to help the understanding of the present application. At the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific embodiments and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims (11)

1. a kind of ultrasonic processing method is applied to electronic equipment, which is characterized in that the electronic equipment includes supersonic sensing Device；The described method includes:

Obtain present mode；

If present mode is first mode, the first ultrasonic wave letter that the ultrasonic sensor emits the first tranmitting frequency is controlled Number；

First ultrasonic signal is received to believe through the reflected first reflection signal of barrier, and according to first reflection Number obtain target fingerprint information；

If present mode is second mode, the second ultrasonic signal that ultrasonic sensor emits the second tranmitting frequency is controlled, Second tranmitting frequency is less than first tranmitting frequency；

Second ultrasonic signal is received to believe through the reflected second reflection signal of barrier, and according to second reflection Number obtain target range information.

2. ultrasonic processing method according to claim 1, which is characterized in that the acquisition present mode includes:

Obtain the information that current application is called；

If the information that the current application is called is finger print information, it is determined that present mode is first mode；

If the information that the current application is called is range information, it is determined that present mode is second mode.

3. ultrasonic processing method according to claim 1, which is characterized in that the acquisition present mode includes:

If currently in the case where ceasing screen state, it is determined that the present mode is second mode；

It is described to be reflected after signal acquisition target range information according to described second, further includes:

Judge whether the electronic equipment display screen has object to block according to the range information；

If unobstructed, fingerprint prompt information is shown in the first area of the electronic equipment display screen, and control the ultrasound Wave sensor emits the first ultrasonic signal of the first tranmitting frequency；

In preset time period, first ultrasonic signal is received through the reflected first reflection signal of barrier, and according to The first reflection signal determines whether to get target fingerprint information；

If the target fingerprint information has not been obtained in the preset time period, the ultrasonic sensor is controlled with the second hair Radio frequency rate emits the second ultrasonic signal.

4. ultrasonic processing method according to claim 3, which is characterized in that if not obtained in the preset time period Get the target fingerprint information, then control the ultrasonic sensor with the second tranmitting frequency emit the second ultrasonic signal it Afterwards, further includes:

If detecting, the electronic equipment is shaken, and controls the first ultrasound that the ultrasonic sensor emits the first tranmitting frequency Wave signal；

Or

If detecting, the electronic equipment display screen has object to block, and controls the first transmitting of ultrasonic sensor transmitting frequency First ultrasonic signal of rate.

5. ultrasonic processing method according to claim 3 or 4, which is characterized in that judge institute according to the range information After stating electronic equipment display screen and whether thering is object to block, further includes:

If blocking, the first ultrasonic signal that the ultrasonic sensor emits the first tranmitting frequency is controlled；

First ultrasonic signal is received to believe through the reflected first reflection signal of barrier, and according to first reflection Number determine whether to get target fingerprint information；

If getting the target fingerprint information, the bright screen of display screen of the electronic equipment is controlled；

If the target fingerprint information has not been obtained, controls the ultrasonic sensor and the second surpassed with the transmitting of the second tranmitting frequency Acoustic signals.

6. ultrasonic processing method according to claim 1, which is characterized in that the method also includes:

It controls the ultrasonic sensor and third ultrasonic signal is emitted with third tranmitting frequency, the third tranmitting frequency is less than First tranmitting frequency, the third tranmitting frequency are greater than second tranmitting frequency；

It receives the third ultrasonic signal and reflects signal through the reflected third of barrier, and reflected and believed according to the third Number obtain user's contact condition.

7. ultrasonic processing method according to claim 6, which is characterized in that described to be obtained according to third reflection signal After taking family contact condition, further includes:

Acquisition fingerprint positions are determined according to the contact condition；

Corresponding first ultrasonic sensor is obtained according to the acquisition fingerprint positions；

The control ultrasonic sensor emits the first ultrasonic signal with the first tranmitting frequency

It controls first ultrasonic sensor and the first ultrasonic signal is emitted with the first tranmitting frequency.

8. ultrasonic processing method according to claim 6, which is characterized in that described to be obtained according to third reflection signal After taking family contact condition, further includes:

The electronic equipment and the relative positional relationship of user are determined according to the contact condition；

Corresponding second ultrasonic sensor of Relation acquisition depending on that relative position；

It is described control ultrasonic sensor emit the second tranmitting frequency the second ultrasonic signal include:

It controls second ultrasonic sensor and the second ultrasonic signal is emitted with the second tranmitting frequency.

9. a kind of ultrasonic treatment unit is applied to electronic equipment, which is characterized in that the electronic equipment includes supersonic sensing Device；Described device includes:

First obtains module, for obtaining present mode；

First transmitting module controls first transmitting of ultrasonic sensor transmitting if being first mode for present mode First ultrasonic signal of frequency；

Second obtains module, for receiving first ultrasonic signal through the reflected first reflection signal of barrier, and According to the first reflection signal acquisition target fingerprint information；

Second transmitting module controls ultrasonic sensor and emits the second tranmitting frequency if being second mode for present mode The second ultrasonic signal, second tranmitting frequency be less than first tranmitting frequency；

Third obtains module, for receiving second ultrasonic signal through the reflected second reflection signal of barrier, and According to the second reflection signal acquisition target range information.

10. a kind of storage medium, which is characterized in that computer program is stored in the storage medium, when the computer journey When sequence is run on computers, so that the computer perform claim requires 1 to 8 described in any item ultrasonic processing methods.

11. a kind of electronic equipment, which is characterized in that the electronic equipment includes processor and memory, is deposited in the memory Computer program is contained, the processor is used for right of execution by obtaining the computer program stored in the memory Benefit requires 1 to 8 described in any item ultrasonic processing methods.