CN110309752B - Ultrasonic processing method, ultrasonic processing apparatus, storage medium, and electronic device - Google Patents

Ultrasonic processing method, ultrasonic processing apparatus, storage medium, and electronic device Download PDF

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CN110309752B
CN110309752B CN201910550342.3A CN201910550342A CN110309752B CN 110309752 B CN110309752 B CN 110309752B CN 201910550342 A CN201910550342 A CN 201910550342A CN 110309752 B CN110309752 B CN 110309752B
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ultrasonic
signal
display screen
transmitting frequency
ultrasonic sensor
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CN110309752A (en
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吴安平
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • User Interface Of Digital Computer (AREA)
  • Collating Specific Patterns (AREA)

Abstract

The embodiment of the application provides an ultrasonic processing method, an ultrasonic processing device, a storage medium and electronic equipment, wherein the method comprises the following steps: acquiring a current mode; if the current mode is the first mode, controlling the ultrasonic sensor to transmit a first ultrasonic signal with a first transmitting frequency; receiving a first reflection signal of the first ultrasonic signal reflected by the barrier, and acquiring target fingerprint information according to the first reflection signal; if the current mode is a second mode, controlling the ultrasonic sensor to transmit a second ultrasonic signal with a second transmitting frequency, wherein the second transmitting frequency is smaller than the first transmitting frequency; and receiving a second reflection signal of the second ultrasonic signal reflected by the barrier, and acquiring target distance information according to the second reflection signal. The screen occupation ratio of the display screen can be improved.

Description

Ultrasonic processing method, ultrasonic processing apparatus, storage medium, and electronic device
Technical Field
The present disclosure relates to the field of electronic technologies, and in particular, to an ultrasonic processing method and apparatus, a storage medium, and an electronic device.
Background
With the development of electronic technology, electronic devices such as smart phones are used more and more frequently in the life of users. Generally, in the process of a call of an electronic device, the electronic device needs to detect a distance between the face of a user and the electronic device to control a display screen of the electronic device to be turned on or off, so as to prevent misoperation caused by the fact that the face of the user touches the display screen of the electronic device. Under the scenes that a user needs to verify the identity of the user, such as unlocking the electronic equipment, realizing a shopping function through the electronic equipment, realizing a payment function through the electronic equipment and the like, the electronic equipment needs to identify the fingerprint of the user so as to judge whether the current user has the operation authority.
In order to implement the above functions, an independent distance sensor needs to be provided in the electronic device to implement the distance detection function, and an independent fingerprint recognition sensor needs to be provided in the electronic device to implement the fingerprint recognition function. Independent distance sensor and fingerprint identification sensor all need occupy the non-display area of electronic equipment display screen to lead to the non-display area increase of display screen, be unfavorable for improving the screen of display screen and account for the ratio.
Disclosure of Invention
The embodiment of the application provides an ultrasonic processing method, an ultrasonic processing device, a storage medium and electronic equipment, which can improve the screen occupation ratio of a display screen of the electronic equipment.
The embodiment of the application provides an ultrasonic processing method, which is applied to electronic equipment, wherein the electronic equipment comprises an ultrasonic sensor; the method comprises the following steps:
acquiring a current mode;
if the current mode is the first mode, controlling the ultrasonic sensor to transmit a first ultrasonic signal with a first transmitting frequency;
receiving a first reflection signal of the first ultrasonic signal reflected by the barrier, and acquiring target fingerprint information according to the first reflection signal;
if the current mode is a second mode, controlling the ultrasonic sensor to transmit a second ultrasonic signal with a second transmitting frequency, wherein the second transmitting frequency is smaller than the first transmitting frequency;
and receiving a second reflection signal of the second ultrasonic signal reflected by the barrier, and acquiring target distance information according to the second reflection signal.
The embodiment of the application also provides an ultrasonic processing device, which is applied to electronic equipment, wherein the electronic equipment comprises an ultrasonic sensor; the device comprises:
the first acquisition module is used for acquiring a current mode;
the first transmitting module is used for controlling the ultrasonic sensor to transmit a first ultrasonic signal with a first transmitting frequency if the current mode is the first mode;
the second acquisition module is used for receiving a first reflection signal of the first ultrasonic signal reflected by the barrier and acquiring target fingerprint information according to the first reflection signal;
the second transmitting module is used for controlling the ultrasonic sensor to transmit a second ultrasonic signal with a second transmitting frequency if the current mode is a second mode, and the second transmitting frequency is smaller than the first transmitting frequency;
and the third acquisition module is used for receiving a second reflection signal of the second ultrasonic signal reflected by the obstacle and acquiring target distance information according to the second reflection signal.
An embodiment of the present application further provides a storage medium, in which a computer program is stored, and when the computer program runs on a computer, the computer is caused to execute the ultrasonic processing method.
The embodiment of the present application further provides an electronic device, which includes a processor and a memory, where the memory stores a computer program, and the processor is configured to execute the ultrasonic processing method by acquiring the computer program stored in the memory.
According to the ultrasonic processing method, the ultrasonic processing device, the storage medium and the electronic equipment, a current mode is obtained firstly; if the current mode is the first mode, controlling the ultrasonic sensor to transmit a first ultrasonic signal with a first transmitting frequency; receiving a first reflection signal of the first ultrasonic signal reflected by the barrier, and acquiring target fingerprint information according to the first reflection signal; if the current mode is a second mode, controlling the ultrasonic sensor to transmit a second ultrasonic signal with a second transmitting frequency, wherein the second transmitting frequency is smaller than the first transmitting frequency; and receiving a second reflection signal of the second ultrasonic signal reflected by the barrier, and acquiring target distance information according to the second reflection signal. Can utilize ultrasonic sensor to acquire distance information and fingerprint information to acquire through ultrasonic signal, ultrasonic signal can see through display screen etc. thereby need not to set up non-display area alone for ultrasonic sensor on the display screen, can reduce ultrasonic sensor to the non-display area's of display screen occupy, consequently can improve the screen of display screen and account for than.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic flow chart of an ultrasonic processing method according to an embodiment of the present application.
Fig. 2 is another schematic flow chart of an ultrasonic processing method according to an embodiment of the present disclosure.
Fig. 3 is a schematic structural diagram of an ultrasonic treatment apparatus according to an embodiment of the present application.
Fig. 4 is a first structural schematic diagram of an electronic device according to an embodiment of the present application.
Fig. 5 is a second structural schematic diagram of an electronic device according to an embodiment of the present application.
FIG. 6 is a cross-sectional view of the electronic device shown in FIG. 5 taken along the direction P1-P1.
Fig. 7 is a schematic view of a first structure of an ultrasonic sensor according to an embodiment of the present application.
Fig. 8 is a schematic structural diagram of a second ultrasonic sensor according to an embodiment of the present application.
Fig. 9 is a schematic structural diagram of a second electrode layer in an ultrasonic sensor provided in an embodiment of the present application.
Fig. 10 is a schematic structural diagram of a first electrode layer in an ultrasonic sensor according to an embodiment of the present disclosure.
Fig. 11 is a schematic connection relationship diagram of a control chip, a first electrode layer and a second electrode layer in an ultrasonic sensor provided in an embodiment of the present application.
Fig. 12 is a schematic structural diagram of a second electronic device according to an embodiment of the present application.
Fig. 13 is a sectional view of the electronic device shown in fig. 12 taken along the direction P2-P2.
Fig. 14 is a schematic structural diagram of a display screen according to an embodiment of the present application.
Fig. 15 is a second structural schematic diagram of a display screen according to an embodiment of the present application.
Fig. 16 is a third structural schematic diagram of a display screen according to an embodiment of the present application.
Fig. 17 is a schematic view of an application scenario of the electronic device for distance detection according to the embodiment of the present application.
Fig. 18 is a schematic view of an application scenario of the electronic device for fingerprint identification according to the embodiment of the present application.
Fig. 19 is a schematic diagram illustrating a principle of fingerprint identification performed by an electronic device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without inventive step, are within the scope of the present application.
The embodiment of the application provides electronic equipment. The electronic device may be a smart phone, a tablet computer, or other devices, and may also be a game device, an AR (Augmented Reality) device, an automobile device, a data storage device, an audio playing device, a video playing device, a notebook computer, a desktop computing device, or other devices.
Referring to fig. 1, fig. 1 is a schematic flow chart of an ultrasonic processing method according to an embodiment of the present application. The ultrasonic processing method provided by the embodiment of the application is applied to electronic equipment, and specifically comprises the following steps:
101, obtaining the current mode.
A current mode of the electronic device is obtained. The current mode may include a first mode and a second mode, the first mode may be understood as a mode in which the current application needs to acquire fingerprint information, and the second mode may be understood as a mode in which the current application needs to acquire distance information. For example, a current application (e.g., a payment application) needs to acquire fingerprint information for payment, a current application (a screen locking application) needs to acquire fingerprint information for unlocking a mobile phone, etc., a current application (a display screen control application) needs to acquire distance information for turning a display screen on or lighting the display screen, etc., and a current application (a distance measurement application) needs to acquire distance information for distance measurement, etc.
And 102, if the current mode is the first mode, controlling the ultrasonic sensor to transmit a first ultrasonic signal with a first transmitting frequency.
And if the current mode is the first mode, namely the current application needs to acquire fingerprint information, controlling the ultrasonic sensor to transmit a first ultrasonic signal with a first transmitting frequency. Specifically, it may be further determined whether the current mode is the first mode by the currently running application program, and if the current mode is the first mode, the current mode is determined to be the first mode. Of course, the determination may also be performed according to information called by the current application program, for example, only when the payment application starts the fingerprint payment function and calls the fingerprint information, the current mode is determined to be the first mode, that is, when the payment application runs but the fingerprint payment function is not started, the current mode cannot be determined to be the first mode.
103, receiving a first reflection signal of the first ultrasonic signal reflected by the obstacle, and acquiring target fingerprint information according to the first reflection signal.
After the first ultrasonic signal is emitted, the first ultrasonic signal is reflected by a barrier (such as a finger of a user), different parts of a fingerprint pattern on the finger of the user are reflected to generate different first reflection signals, and the ultrasonic sensor receives the first reflection signals and acquires a fingerprint image of the finger of the user according to the first reflection signals.
And 104, if the current mode is the second mode, controlling the ultrasonic sensor to transmit a second ultrasonic signal with a second transmitting frequency, wherein the second transmitting frequency is less than the first transmitting frequency.
And if the current mode is the first mode, namely the current application needs to acquire the distance information, controlling the ultrasonic sensor to transmit a second ultrasonic signal at a second transmitting frequency, wherein the second transmitting frequency is smaller than the first transmitting frequency. Specifically, it may be further determined whether the current mode is the second mode by the currently running application, and if the current mode is the second mode, the current mode is determined to be the second mode. Of course, the determination may also be made according to information called by the current application program, for example, the current mode is determined to be the second mode only when the distance measurement application starts the distance measurement function.
And 105, receiving a second reflection signal of the second ultrasonic signal reflected by the obstacle, and acquiring target distance information according to the second reflection signal.
After the second ultrasonic signal is emitted, the second ultrasonic signal is reflected back through an obstacle (such as the face of a user), the ultrasonic sensor receives the second reflected signal, and the distance information of the obstacle from the electronic equipment can be detected according to the intensity of the second reflected signal or the intensity difference between the second ultrasonic signal and the second emitted signal or the time difference between the emitted second ultrasonic signal and the received second reflected signal.
In the related art, a special infrared sensor is needed for the infrared proximity sensor, the infrared sensor is not beneficial to the overall screen design of the display screen, and when the infrared device is arranged below the lighted display screen, visible light spots can be generated when infrared light penetrates the display screen, so that the display effect is influenced; current infrared proximity can only be used under information screens. For the touch screen to realize proximity detection, as the touch screen function utilizes the coupling capacitor, the touch screen function and the proximity function need to be compatible in a call scene, and error touch is easy to generate; in addition, the distance that the touch screen can test is only 1-3 cm, and the sensitivity of the test approach is limited. The infrared approach test distance is above 4 cm.
Therefore, the ultrasonic processing method provided by the embodiment of the application can realize the distance detection function and the fingerprint identification function by using the same ultrasonic sensor. And, ultrasonic sensor can set up in display screen display area below, ultrasonic sensor detects and discerns when realizing apart from detecting and fingerprint identification through ultrasonic signal, and ultrasonic signal can see through the display screen to need not to set up the non-display area for ultrasonic sensor alone on the display screen, also can reduce ultrasonic sensor and to the non-display area's of display screen occupation, consequently can improve the screen of display screen and account for the ratio.
Further, as the frequency of the ultrasonic signal is higher, the wavelength is shorter, the linear propagation property is better, diffraction is less likely to occur when the ultrasonic signal contacts an obstacle, and the loss is larger when the ultrasonic signal is transmitted through a medium. Accordingly, as the frequency of the ultrasonic signal is smaller, the wavelength is longer, the linear propagation property is worse, diffraction is relatively likely to occur when the ultrasonic signal contacts an obstacle, and the loss is relatively small when the ultrasonic signal is transmitted through a medium. The ultrasonic frequency is high, and the easy decay meets the air, but the straight line propaganda nature is good, if ultrasonic wave is used for fingerprint identification, the signal of transmission only need arrive the fingerprint with screen contact, is received by ultrasonic sensor after the fingerprint reflection, and the middle does not have the influence of air bed. The ultrasonic frequency is low, and the ultrasonic wave can be transmitted in the air, but because the linear transmission is poor, the image of the object can not be acquired, and only the existence of the reflected signal of the shielding object can be judged, so that the distance information acquisition function or the approaching function is realized. In the first mode, when the target fingerprint information needs to be acquired, the ultrasonic sensor is controlled to transmit a first ultrasonic signal at a high frequency (first transmitting frequency). And in the second mode, namely when the target distance information needs to be acquired, controlling the ultrasonic sensor to transmit a second ultrasonic signal at a low frequency (second transmitting frequency).
Referring to fig. 2, fig. 2 is another schematic flow chart of an ultrasonic processing method according to an embodiment of the present disclosure. The ultrasonic processing method provided by the embodiment of the application is applied to the electronic device in any embodiment, and specifically includes:
and 201, acquiring the information of the current application call.
A current mode of the electronic device is obtained. The current mode may include a first mode and a second mode, the first mode and the second mode being distinguished according to information of a current application call.
202, if the information called by the current application is fingerprint information, determining that the current mode is the first mode.
The first mode may be understood as the current application requiring the acquisition of fingerprint information. For example, a current application (e.g., a payment application) needs to acquire fingerprint information for payment, and a current application (e.g., a screen lock application) needs to acquire fingerprint information for unlocking a mobile phone.
For example, when the current application is a payment application, only the payment record may be viewed, and fingerprint payment is not used, the first mode in the current mode may not be considered at this time, and only when the fingerprint payment function is used and the fingerprint information is called, the current mode is determined to be the first mode.
And 203, if the information called by the current application is distance information, determining that the current mode is a second mode.
The second mode may be understood as the current application needs to acquire distance information. For example, the current application (display screen control application) needs to acquire distance information to display a screen or highlight the screen, and the screen needs to be displayed to prevent false touch during the call. The current application (ranging application) needs to acquire distance information for ranging, etc. The electronic device may run simultaneously with multiple applications, and the multiple applications may call the fingerprint information and the distance information, respectively. For example, when the screen is turned off, the distance information needs to be called to determine whether to light up the fingerprint icon (light up part or all of the display screen) to prompt the user of the position for fingerprint identification, and the fingerprint information needs to be called to determine whether to unlock and light up the screen. At this time, whether the current mode is the first mode or the second mode is determined by the called information.
In some applications, the same application may call different information at different times, and the current mode is determined by the information called by the application. For example, when the WeChat application is used, the distance information is called to determine whether to screen the WeChat application in a video call or a voice call, and the fingerprint information is called to pay by using the WeChat application.
In some embodiments, determining the current mode may further include:
and if the current mode is in the screen-on-screen state, determining that the current mode is the second mode.
The method comprises the steps that when a display screen of the electronic equipment is in a screen-saving state, the current mode is directly determined to be the second mode, and the determination is not carried out by judging the calling information of the current application.
And 204, if the current mode is the first mode, controlling the ultrasonic sensor to transmit a first ultrasonic signal with a first transmitting frequency.
And if the current mode is the first mode, namely the current application needs to acquire fingerprint information, controlling the ultrasonic sensor to transmit a first ultrasonic signal with a first transmitting frequency.
205, receiving a first reflection signal of the first ultrasonic signal reflected by the obstacle, and obtaining the target fingerprint information according to the first reflection signal.
After the first ultrasonic signal is emitted, the first ultrasonic signal is reflected by a barrier (such as a finger of a user), different parts of a fingerprint pattern on the finger of the user are reflected to generate different first reflection signals, and the ultrasonic sensor receives the first reflection signals and acquires a fingerprint image of the finger of the user according to the first reflection signals.
And 206, if the current mode is the second mode, controlling the ultrasonic sensor to transmit a second ultrasonic signal with a second transmitting frequency, wherein the second transmitting frequency is less than the first transmitting frequency.
And if the current mode is the first mode, namely the current application needs to acquire the distance information, controlling the ultrasonic sensor to transmit a second ultrasonic signal at a second transmitting frequency, wherein the second transmitting frequency is smaller than the first transmitting frequency.
And 207, receiving a second reflection signal of the second ultrasonic signal reflected by the obstacle, and acquiring target distance information according to the second reflection signal.
After the second ultrasonic signal is emitted, the second ultrasonic signal is reflected back through an obstacle (such as the face of a user), the ultrasonic sensor receives the second reflected signal, and the distance information of the obstacle from the electronic equipment can be detected according to the intensity of the second reflected signal or the intensity difference between the second ultrasonic signal and the second emitted signal or the time difference between the emitted second ultrasonic signal and the received second reflected signal.
In some embodiments, the method further comprises:
if the current mode is the second mode and is directly determined in the state that the display screen of the electronic equipment is in the information screen state, judging whether the display screen of the electronic equipment is shielded by an object or not according to the distance information;
if the electronic equipment display screen is not shielded, displaying fingerprint prompt information in a first area of the electronic equipment display screen, and controlling the ultrasonic sensor to transmit a first ultrasonic signal with a first transmitting frequency;
within a preset time period, receiving a first reflection signal of the first ultrasonic signal reflected by an obstacle, and determining whether target fingerprint information is acquired according to the first reflection signal;
and if the target fingerprint information is not acquired within the preset time period, controlling the ultrasonic sensor to transmit a second ultrasonic signal at a second transmitting frequency.
In the screen-saving state, whether an object is shielded on the display screen of the electronic equipment is judged according to the distance information, if the object is not shielded, the electronic equipment can be placed on a desk or held, and at the moment, the ultrasonic sensor is controlled to emit a first ultrasonic signal with a first emitting frequency to identify fingerprint information so as to unlock the electronic equipment. If the fingerprint is not identified within the preset time period, which indicates that the electronic device is not used currently, the ultrasonic sensor can be switched to emit the second ultrasonic signal at the second emission frequency, so that the power consumption is reduced.
In some embodiments, if the target fingerprint information is not acquired within the preset time period, after controlling the ultrasonic sensor to transmit a second ultrasonic signal at a second transmission frequency, the method further includes:
if the electronic equipment is detected to shake, controlling the ultrasonic sensor to transmit a first ultrasonic signal with a first transmitting frequency;
or
And if the fact that the display screen of the electronic equipment is shielded by an object is detected, controlling the ultrasonic sensor to transmit a first ultrasonic signal with a first transmitting frequency.
After the ultrasonic Sensor is switched to emit the second ultrasonic signal at the second emission frequency, if the electronic equipment is detected to shake (which can be detected through a G-Sensor and the like), the user is considered to possibly use the electronic equipment, and at the moment, the ultrasonic Sensor is controlled to emit the first ultrasonic signal at the first emission frequency to identify fingerprint information so as to unlock the electronic equipment. And if the fact that the display screen of the electronic equipment is shielded is detected, namely the display screen of the electronic equipment is shielded from the non-shielding state, the user is considered to possibly use the electronic equipment, and at the moment, the ultrasonic sensor is controlled to transmit the first ultrasonic signal with the first transmitting frequency to identify the fingerprint information so as to unlock the electronic equipment.
The ultrasonic sensor of the electronic device may be disposed below the display screen, and may cover a partial area of the display screen, may cover the entire display area of the display screen, or may cover the entire area of the display screen.
After the ultrasonic sensor is controlled to transmit the first ultrasonic signal with the first transmitting frequency, if fingerprint information is not identified after a period of time, the ultrasonic sensor is switched back to be controlled to transmit the second ultrasonic signal with the second transmitting frequency.
In some embodiments, if the current mode is the second mode and is directly determined in the screen saver state of the display screen of the electronic device, 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 the shielding exists, controlling the ultrasonic sensor to transmit a first ultrasonic signal with a first transmitting frequency;
receiving a first reflection signal of the first ultrasonic signal reflected by the barrier, and determining whether target fingerprint information is acquired according to the first reflection signal;
if the target fingerprint information is acquired, controlling a display screen of the electronic equipment to be lightened, wherein the display screen can be lightened as long as the target fingerprint information is detected, or the display screen can be lightened only when the detected target fingerprint information is matched with preset fingerprint information stored in the electronic equipment;
if the target fingerprint information is not acquired, the ultrasonic sensor is controlled to transmit a second ultrasonic signal at a second transmitting frequency, the ultrasonic sensor is controlled to transmit a first ultrasonic signal at a first transmitting frequency after a period of time, or the ultrasonic sensor is kept controlled to transmit a second ultrasonic signal at a second transmitting frequency until the shielding information is not changed.
If the shielding exists, the user possibly has the finger shielding the display screen, and the fingerprint unlocking is possible, the ultrasonic sensor is controlled to transmit a first ultrasonic signal with a first transmitting frequency for fingerprint identification. At this time, if the finger of the user is shielded, the fingerprint can be identified, and the electronic device is controlled according to the identified fingerprint information, such as screen lightening and display screen unlocking. If placed in a bag, or otherwise occluded, the fingerprint is not recognized. And if the fingerprint cannot be identified after a period of time, switching to control the ultrasonic sensor to transmit a second ultrasonic signal at a second transmitting frequency so as to reduce power consumption.
One of the usage scenarios is that a fingerprint icon is lighted up under the screen (part or all of the display screen is lighted up) to prompt the user of the position of fingerprint identification, and whether an object is shielded or not is judged through a proximity function (controlling the ultrasonic sensor to emit a second ultrasonic signal with a second emission frequency). When the electronic equipment is not shielded, whether the electronic equipment shakes or not can be judged through the G-Sensor, the shaking indicates that a user is about to operate the electronic equipment, the fingerprint icon is lightened for unlocking the fingerprint of the user, and meanwhile the ultrasonic Sensor is controlled to transmit a first ultrasonic signal with a first transmitting frequency; even if the electronic equipment is not shielded in the shaking-free state, the user does not operate the mobile phone, and the fingerprint icon is not lightened, so that the power consumption of the display screen is saved. When the shielding exists, the fingerprint icon is not lightened, and the power consumption of the display screen is saved, wherein the shielding indicates that the electronic equipment is possibly in a user pocket or an inoperable place. In some embodiments, the method further comprises:
controlling the ultrasonic sensor to transmit a third ultrasonic signal at a third transmit frequency, the third transmit frequency being less than the first transmit frequency, the third transmit frequency being greater than the second transmit frequency;
and receiving a third reflection signal of the third ultrasonic signal reflected by the barrier, and acquiring a user contact state according to the third reflection signal.
The ultrasonic sensor can be controlled to emit a third ultrasonic signal at a third emitting frequency, the third emitting frequency is between the first emitting frequency and the second emitting frequency, and a user contact state is obtained through a third emitting signal emitted by the third ultrasonic signal at the third emitting frequency, wherein the contact state can comprise a holding state and relative position information of the user. After the holding state and the relative position information are obtained, the display direction of the display screen (a horizontal screen or a vertical screen, and the display direction under the horizontal screen or the vertical screen) can be controlled, and the working antenna (the antenna which is not blocked by holding) can be selected according to the holding state.
In some embodiments, after obtaining the user contact state according to the third reflection signal, the method further includes:
determining a fingerprint collecting position according to the contact state;
acquiring a corresponding first ultrasonic sensor according to the fingerprint acquisition position;
the controlling the ultrasonic sensor to emit a first ultrasonic signal at a first emitting frequency comprises:
the first ultrasonic sensor is controlled to transmit a first ultrasonic signal at a first transmission frequency.
After the contact state of the user is obtained, the contact position of the user and the electronic equipment can be obtained, the contact position of the finger and the electronic equipment is obtained, the fingerprint collecting position, such as the middle area of a display screen, is determined, then the corresponding first ultrasonic sensor is obtained according to the fingerprint collecting position, if 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 emit a first ultrasonic signal at a first emitting frequency so as to obtain fingerprint information. Ultrasonic sensors at other positions can not transmit and receive ultrasonic information, and can also transmit ultrasonic signals at the second transmitting frequency or the third transmitting frequency, so that the power consumption is reduced, and other unnecessary ultrasonic signals are prevented from interfering fingerprint identification.
In some embodiments, after obtaining the user contact state according to the third reflection signal, the method further includes:
determining the relative position relation between the electronic equipment and a user according to the contact state;
acquiring a corresponding second ultrasonic sensor according to the relative position relation;
the controlling the ultrasonic sensor to transmit the second ultrasonic signal of the second transmission frequency comprises:
controlling the second ultrasonic sensor to emit a second ultrasonic signal at a second emission frequency.
After the contact state of the user is obtained, the relative position between the user and the electronic equipment and the relative position between the face of the user and the electronic equipment are obtained, so that the position for obtaining distance information, such as the top area of the display screen, is determined, then the corresponding second ultrasonic sensor is obtained according to the relative position or the position for obtaining the distance information, if the ultrasonic sensor corresponding to the top area of the display screen is set as the second ultrasonic sensor, and then the second ultrasonic sensor is controlled to emit a second ultrasonic signal at a second emitting frequency so as to obtain the distance information. Ultrasonic sensors at other positions can not transmit and receive ultrasonic information, power consumption is reduced, and meanwhile other unnecessary ultrasonic signals are prevented from interfering fingerprint identification. Of course, the ultrasonic sensors at other positions may 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, determining whether the user is a legitimate user through fingerprint identification, and the like.
Therefore, the ultrasonic processing method provided by the embodiment of the application can realize the distance detection function and the fingerprint identification function by using the same ultrasonic sensor. And, ultrasonic sensor can set up in the display screen below, ultrasonic sensor detects and discerns through ultrasonic signal when realizing distance detection and fingerprint identification, and ultrasonic signal can see through the display screen to need not to set up the non-display area for ultrasonic sensor alone on the display screen, also can reduce ultrasonic sensor and to the non-display area's of display screen occupy, consequently can improve the screen of display screen and account for the ratio.
Further, as the frequency of the ultrasonic signal is higher, the wavelength is shorter, the linear propagation property is better, diffraction is less likely to occur when the ultrasonic signal contacts an obstacle, and the loss is larger when the ultrasonic signal is transmitted through a medium. Accordingly, as the frequency of the ultrasonic signal is smaller, the wavelength is longer, the linear propagation property is worse, diffraction is relatively likely to occur when the ultrasonic signal contacts an obstacle, and the loss is relatively small when the ultrasonic signal is transmitted through a medium. The ultrasonic frequency is high, and the easy decay meets the air, but the straight line propaganda nature is good, and the signal of transmission only need arrive the fingerprint with screen contact, is received by ultrasonic sensor after fingerprint reflection, and the middle no influence of air bed. The ultrasonic frequency is low, and the ultrasonic wave can be transmitted in the air, but because the linear transmission is poor, the image of the object can not be acquired, and only the existence of the reflected signal of the shielding object can be judged, so that the distance information acquisition function or the approaching function is realized. In the first mode, when the target fingerprint information needs to be acquired, the ultrasonic sensor is controlled to transmit a first ultrasonic signal at a high frequency (first transmitting frequency).
It should be noted that, in the above embodiments, the ultrasonic sensor may be disposed not only below the display screen, but also in the display screen, and may also be disposed on the rear cover and the side of the electronic device.
In the description of the present application, it is to be understood that terms such as "first", "second", and the like are used merely to distinguish one similar element from another, and are not to be construed as indicating or implying relative importance or implying any indication of the number of technical features indicated.
In particular implementation, the present application is not limited by the execution sequence of the described steps, and some steps may be performed in other sequences or simultaneously without conflict.
The embodiment of the application also provides an ultrasonic processing device, and the ultrasonic processing device can be integrated in the electronic equipment. Referring to fig. 3, fig. 3 is a schematic structural diagram of an ultrasonic processing apparatus according to an embodiment of the present application. Wherein the electronic device comprises an ultrasonic sensor. The ultrasound 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.
A first obtaining module 301, configured to obtain a current mode.
The first transmitting module 302 is configured to control the ultrasonic sensor to transmit a first ultrasonic signal at a first transmitting frequency if the current mode is the first mode.
The second obtaining module 303 is configured to receive a first reflection signal of the first ultrasonic signal reflected by the obstacle, and obtain the target fingerprint information according to the first reflection signal.
The second transmitting module 304 is configured to control the ultrasonic sensor to transmit a second ultrasonic signal with a second transmitting frequency if the current mode is the second mode, where the second transmitting frequency is smaller than the first transmitting frequency.
A third obtaining module 305, configured to receive a second reflected signal of the second ultrasonic signal reflected by the obstacle, and obtain the target distance information according to the second reflected signal.
In some embodiments, the first obtaining module 301 is further configured to obtain information of a current application call; if the information called by the current application is fingerprint information, determining that the current mode is a first mode; and if the information called by the current application is distance information, determining that the current mode is a second mode.
In some embodiments, the ultrasound treatment device further comprises a control module. The first obtaining module 301 is further configured to determine that the current mode is the second mode if the current mode is in the breath screen state.
The control module is used for judging whether an object is shielded on the display screen of the electronic equipment according to the distance information; if the electronic equipment display screen is not shielded, displaying fingerprint prompt information in a first area of the electronic equipment display screen; and if the electronic equipment is detected to shake, controlling the ultrasonic sensor to transmit a first ultrasonic signal with a first transmitting frequency.
In some embodiments, the control module is further configured to control the ultrasonic sensor to transmit a first ultrasonic signal at a first transmission frequency if there is an occlusion; receiving a first reflection signal of the first ultrasonic signal reflected by the barrier, and determining whether target fingerprint information is acquired according to the first reflection signal; if the target fingerprint information is acquired, controlling a display screen of the electronic equipment to be bright; and if the target fingerprint information is not acquired, controlling the ultrasonic sensor to transmit a second ultrasonic signal at a second transmitting frequency.
In some embodiments, the ultrasound processing apparatus further comprises a third transmitting module and a third acquiring module.
The third transmitting module is used for controlling the ultrasonic sensor to transmit a third ultrasonic signal at a third transmitting frequency, wherein the third transmitting frequency is less than the first transmitting frequency, and the third transmitting frequency is greater than the second transmitting frequency.
The third acquisition module is used for receiving a third reflection signal of the third ultrasonic signal reflected by the barrier and acquiring a user contact state according to the third reflection signal.
In some embodiments, the third obtaining module is further configured to determine a location of the captured fingerprint according to the contact state; and acquiring a corresponding first ultrasonic sensor according to the fingerprint collecting position.
The first transmitting module is further used for controlling 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 a relative positional relationship between the electronic device and a user according to the contact state; and acquiring a corresponding second ultrasonic sensor according to the relative position relation.
The second transmitting module is further used for controlling the second ultrasonic sensor to transmit a second ultrasonic signal at a second transmitting frequency.
The specific implementation of the ultrasonic processing apparatus can refer to the above embodiments, and is not described herein again.
Referring to fig. 4, fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure.
Electronic device 300 includes, among other things, a processor 310 and a memory 320. The processor 310 is electrically connected to the memory 320.
The processor 310 is a control center of the electronic device 300, connects various parts of the entire electronic device using various interfaces and lines, performs various functions of the electronic device and processes data by running or calling a computer program stored in the memory 320, and calling data stored in the memory 320, thereby performing overall monitoring of the electronic device.
In this embodiment, the processor 310 in the electronic device 300 loads instructions corresponding to one or more processes of the computer program into the memory 320 according to the following steps, and the processor 310 runs the computer program stored in the memory 320, so as to execute the following steps:
acquiring a current mode;
if the current mode is the first mode, controlling the ultrasonic sensor to transmit a first ultrasonic signal with a first transmitting frequency;
receiving a first reflection signal of the first ultrasonic signal reflected by the barrier, and acquiring target fingerprint information according to the first reflection signal;
if the current mode is a second mode, controlling the ultrasonic sensor to transmit a second ultrasonic signal with a second transmitting frequency, wherein the second transmitting frequency is smaller than the first transmitting frequency;
and receiving a second reflection signal of the second ultrasonic signal reflected by the barrier, and acquiring target distance information according to the second reflection signal.
In some embodiments, when obtaining the current mode, the processor 310 performs the following steps:
acquiring information called by a current application;
if the information called by the current application is fingerprint information, determining that the current mode is a first mode;
and if the information called by the current application is distance information, determining that the current mode is a second mode.
In some embodiments, when obtaining the current mode, the processor 310 performs the following steps:
if the current mode is in the breath screen state, determining that the current mode is a second mode;
after the target distance information is obtained according to the second reflection signal, the method further includes:
judging whether an object is shielded on the display screen of the electronic equipment or not according to the distance information;
if the electronic equipment display screen is not shielded, displaying fingerprint prompt information in a first area of the electronic equipment display screen;
and if the electronic equipment is detected to shake, controlling the ultrasonic sensor to transmit a first ultrasonic signal with a first transmitting frequency.
In some embodiments, after determining whether the electronic device display screen is occluded by an object according to the distance information, the processor 310 performs the following steps:
if the shielding exists, controlling the ultrasonic sensor to transmit a first ultrasonic signal with a first transmitting frequency;
receiving a first reflection signal of the first ultrasonic signal reflected by the barrier, and determining whether target fingerprint information is acquired according to the first reflection signal;
if the target fingerprint information is acquired, controlling a display screen of the electronic equipment to be bright;
and if the target fingerprint information is not acquired, controlling the ultrasonic sensor to transmit a second ultrasonic signal at a second transmitting frequency.
In some embodiments, the processor 310 performs the following steps:
controlling the ultrasonic sensor to transmit a third ultrasonic signal at a third transmit frequency, the third transmit frequency being less than the first transmit frequency, the third transmit frequency being greater than the second transmit frequency;
and receiving a third reflection signal of the third ultrasonic signal reflected by the barrier, and acquiring a user contact state according to the third reflection signal.
In some embodiments, after obtaining the user contact status according to the third reflection signal, the processor 310 performs the following steps:
determining a fingerprint collecting position according to the contact state;
acquiring a corresponding first ultrasonic sensor according to the fingerprint acquisition position;
the first ultrasonic sensor is controlled to transmit a first ultrasonic signal at a first transmission frequency.
In some embodiments, after obtaining the user contact status according to the third reflection signal, the processor 310 performs the following steps:
determining the relative position relation between the electronic equipment and a user according to the contact state;
acquiring a corresponding second ultrasonic sensor according to the relative position relation;
controlling the second ultrasonic sensor to emit a second ultrasonic signal at a second emission frequency.
Memory 320 may be used to store computer programs and data. Memory 320 stores computer programs comprising instructions executable in the processor. The computer program may constitute 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 the electronic device according to the 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 rear cover 60.
The display screen 10 may be mounted on the middle frame 30 and connected to the rear cover 60 through the middle frame 30 to form a display surface of the electronic device 100 for displaying information such as images and texts. The Display screen 10 may include a Liquid Crystal Display (LCD) or an Organic Light-Emitting Diode (OLED) Display screen.
It will be appreciated 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 a user can observe information displayed on the display screen 10 through the cover plate. For example, the cover plate may be a glass cover plate of sapphire material.
The ultrasonic sensor 20 may be disposed at the bottom of the display screen 10 and mounted on the middle frame 30. That is, the ultrasonic sensor 20 is disposed on a side facing away from the display surface of the display screen 10. The display surface of the display screen 10 is a surface facing a user when the display screen 10 displays information.
The ultrasonic sensor 20 is used to implement a distance detection function of the electronic device 100 and a fingerprint recognition function of the electronic device 100. Wherein the ultrasonic sensor 20 can emit an ultrasonic signal. The ultrasonic signal is transmitted through the display screen 10 to contact an obstacle (e.g., the face of a user) and generate a reflection signal, and the ultrasonic sensor 20 receives the reflection signal, so that the distance from the obstacle to the electronic device 100 can be detected according to the intensity of the reflection signal or the time difference between the transmission of the ultrasonic signal and the reception of the reflection signal. On the other hand, when the electronic device needs to perform fingerprint identification, the ultrasonic signal penetrates through the display screen 10 to contact the finger of the user, different parts of the fingerprint pattern on the finger of the user are reflected to generate different reflection signals, and the ultrasonic sensor 20 receives the reflection signals and acquires the fingerprint image of the finger of the user according to the reflection signals, so that the fingerprint identification can be performed.
The middle frame 30 may have a thin plate-like or sheet-like structure, or may have a hollow frame structure. The middle frame 30 is used for providing a supporting function for the electronic components or functional assemblies in the electronic device 100, so as to mount the electronic components or functional assemblies in the electronic device 100 together.
The middle frame 30 and the rear cover 60 may together form a housing of the electronic device 100, for accommodating or mounting 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 of the electronic apparatus, such as a camera, a receiver, a circuit board, and a battery, may be mounted on the center frame 30 to be fixed. It is 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 a motherboard of the electronic device 100. One or more of the functional components such as a microphone, a speaker, a receiver, an earphone interface, a camera, an acceleration sensor, a gyroscope, and a processor may be integrated on the circuit board 40. Meanwhile, the display screen 10 may be electrically connected to the circuit board 40 to control the display of the display screen 10 by a processor on the circuit board 40.
The battery 50 may be mounted on the middle frame 30. Meanwhile, the battery 50 is electrically connected to the circuit board 40 to enable the battery 50 to power the electronic device 100. The circuit board 40 may be provided thereon with a power management circuit. The power management circuit is used to distribute the voltage provided by the battery 50 to the various electronic components in the electronic device 100.
The rear cover 60 may be integrally formed. In the molding process of the rear cover 60, a rear camera hole or the like may be formed on the rear cover 60.
Referring to fig. 7, fig. 7 is a schematic view of a first structure of an ultrasonic sensor according to an embodiment of the present application.
The ultrasonic sensor 20 includes a piezoelectric material layer 21 and an electrode layer 22, which are stacked.
The piezoelectric material layer 21 may generate an ultrasonic signal when a voltage is applied and emit the ultrasonic signal outward. The voltage applied to the piezoelectric material layer 21 may be, for example, a driving signal. It will be appreciated that the drive signal is a high frequency alternating current signal. The material of the piezoelectric material layer 21 may include, for example, piezoelectric ceramics. That is, the piezoelectric material layer 21 may be a laminated structure formed of piezoelectric ceramics.
The piezoelectric material layer 21 may time-divisionally emit a first ultrasonic signal of a first emission frequency and a second ultrasonic signal of a second emission frequency. I.e. the same piezoelectric material 21 emits a first ultrasonic signal at a first emission frequency at a first time and a second ultrasonic signal at a second emission frequency at a second time. The piezoelectric material layer 21 may further include a first region 21A and a second region 21B adjacent to each other. The first region 21A is used for transmitting ultrasonic signals of a first transmission frequency, and the second region 21B is used for transmitting ultrasonic signals of a second transmission frequency. Wherein the first transmit frequency is greater than the second transmit frequency. The ultrasonic signal of the first transmitting frequency is used to transmit 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 transmitting frequency is used to transmit through the display screen 10 of the electronic device 100 to realize the distance detection function of the electronic device 100.
Therefore, the ultrasonic sensor 20 provided in the embodiment of the present application can simultaneously realize the distance detection function and the fingerprint recognition function. Moreover, when the ultrasonic sensor 20 realizes distance detection and fingerprint identification, the ultrasonic signal is detected and identified through the ultrasonic signal, and the ultrasonic signal can penetrate through the display screen, so that a non-display area does not need to be set independently for the ultrasonic sensor 20 on the display screen, the occupation of the ultrasonic sensor 20 on the non-display area of the display screen can be reduced, and the screen occupation ratio of the display screen can be improved.
The larger the frequency of the ultrasonic signal, the shorter the wavelength, the better the linear propagation property, and the more diffraction is less likely to occur when the ultrasonic signal contacts an obstacle, and the larger the loss is when the ultrasonic signal is transmitted through a medium. Accordingly, as the frequency of the ultrasonic signal is smaller, the wavelength is longer, the linear propagation property is worse, diffraction is relatively likely to occur when the ultrasonic signal contacts an obstacle, and the loss is relatively small when the ultrasonic signal is transmitted through a medium.
When the electronic device performs distance detection, that is, when detecting a distance between an obstacle (e.g., a human face) and the electronic device, the obstacle and the electronic device are not in direct contact, that is, the obstacle and the electronic device are far away from each other. The ultrasonic signal emitted by the ultrasonic sensor 20 needs to be transmitted in the air for a certain distance after passing through the display screen 10, so as to contact with the obstacle. In order to reduce the losses caused by the transmission of the ultrasonic signal in the air, the frequency setting of the ultrasonic signal for distance detection is relatively small, i.e. the first transmission frequency is small.
Wherein the first transmission frequency may range from greater than 10 MHz. For example, the first transmission frequency may be 12 MHz. The second transmission frequency may range between 20KHz and 1MHz, i.e. the second transmission frequency is greater than 20KHz and less than 1 MHz. For example, the second transmission frequency may be 60 KHz. It should be noted that the above values are only exemplary, and the embodiments of the present application may adjust the above specific values as needed.
When the electronic device performs fingerprint recognition, a user's finger is usually 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 short. The ultrasonic signal emitted from the ultrasonic sensor 20 can directly contact the user's finger after passing through the display screen 10 without being transmitted in the air, and the loss of the ultrasonic signal in the whole transmission process is relatively small. In order to improve the accuracy of collecting the fingerprint image of the user, that is, to improve the definition of the collected fingerprint image, the diffraction of the ultrasonic signal when contacting the finger of the user can be reduced as much as possible, so that the frequency setting of the ultrasonic signal for fingerprint identification is relatively large, that is, the second transmitting frequency is large.
It can be understood that the scene in which the electronic device 100 needs to perform distance detection is generally a call scene. For example, when the electronic device 100 is in a call-making scene, a voice call scene, a voice playing message, or the like, it is generally necessary to detect a distance between an obstacle and the electronic device 100 to prevent a malfunction of the electronic device 100 due to a false touch of the obstacle. In these call scenarios, it is necessary to transmit the sound signal 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 generally provided at an end portion of the electronic device. For example, a microphone may be disposed at the top end of the electronic device 100 and a speaker may be disposed at the bottom end of the electronic device 100. That is, it can be understood that the part of the electronic device that transmits the sound signal outwards is relatively fixed and is usually located at the end of the electronic device, and when the user listens to the sound signal transmitted outwards by the electronic device, the ear or the face naturally approaches the end of the electronic device.
In order to accurately detect the distance between an obstacle (the ear or face of the user) and the electronic apparatus 100 when the electronic apparatus 100 is in a call scene, a detection portion for distance detection may also be provided at an end portion of the electronic apparatus 100.
Therefore, in the ultrasonic sensor 20, the first region 21A of the piezoelectric material layer 21 may be located at one end portion of the piezoelectric material layer 21. For example, as shown in fig. 7, the first region 21A is located at an end of the piezoelectric material layer 21. It is understood that fig. 7 is only a schematic diagram, and the first region 21A may be located at the top end or the bottom end of the piezoelectric material layer 21 if the position of the ultrasonic sensor 20 in the electronic device 100 is taken as the position when the electronic device 100 is vertically placed.
In addition, since the portion of the electronic device that 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 portion of the electronic device that transmits the sound signal to the outside on the electronic device is relatively small. When the electronic device performs fingerprint identification, the position touched or pressed by the user on the display screen of the electronic device is not fixed, and the area supporting the touch or pressing by the user on the display screen is large, so that the area of the electronic device for performing fingerprint identification needs to be covered to a large 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. Thus, the ultrasonic sensor 20 can perform fingerprint recognition in a relatively fixed range through the first region 21A, and can perform distance detection in a smaller range through the second region 21B.
With continued reference to fig. 7, the electrode layer 22 is connected to the piezoelectric material layer 21. For example, the electrode layer 22 and the piezoelectric material layer 21 may be stacked and connected.
The electrode layer 22 is configured to apply a driving signal to the piezoelectric material layer 21 to drive a first region 21A of the piezoelectric material layer 21 to emit an ultrasonic signal at a first emitting frequency, and drive a second region 21B of the piezoelectric material layer 21 to emit an ultrasonic signal at a second emitting frequency. The driving signal may be a high-frequency alternating current signal, such as a high-frequency pulse signal. The first transmitting frequency is greater than the second transmitting frequency.
It will be appreciated that the electrode layer 22 may include two spaced electrode layers, such as a positive electrode layer and a negative electrode layer.
Referring to fig. 8, fig. 8 is a schematic view of a second structure of an ultrasonic sensor according to an embodiment of the present application.
The electrode layer 22 includes a first electrode layer 221 and a second electrode layer 222 disposed at an interval. 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.
Wherein 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 is understood that the functions of the first electrode layer 221 and the second electrode layer 222 may be interchanged, that is, the first electrode layer 221 is a negative electrode layer of the piezoelectric material layer 21, and the second electrode layer 222 is a positive electrode layer of the piezoelectric material layer 21.
Wherein the first electrode layer 221 and the second electrode layer 222 are used to apply a driving signal to the piezoelectric material layer 21 in common. For example, the first electrode layer 221 and the second electrode layer 222 may have different electric 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.
When the piezoelectric material layer 21 is driven by the driving signal to emit the ultrasonic signal, the frequency of the emitted ultrasonic signal is the same as the frequency of the driving signal. That is, what is the frequency of the drive signal applied to the piezoelectric material layer 21, and what is the frequency of the ultrasonic wave signal emitted by the piezoelectric material layer 21.
Therefore, in order to drive different regions of the piezoelectric material layer 21 to emit ultrasonic signals of different frequencies, drive signals of different frequencies may be applied to different regions of the piezoelectric material layer 21.
Wherein the first electrode layer 221 may be set to be an equipotential layer. That is, the electric potential at any position of the first electrode layer 221 is equal.
The second electrode layer 222 includes a first electrode region 222A and a second electrode region 222B adjacent to each other.
Wherein 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 layer 21. The first electrode region 222A and the first electrode layer 221 are configured to apply a driving signal of a first transmitting frequency to the first region 21A of the piezoelectric material layer 21 in common, so as to drive the first region 21A to transmit an ultrasonic signal of the first transmitting frequency. For example, the first electrode region 222A and the first electrode layer 221 may be used to commonly apply a driving signal of 12MHz 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 layer 21. The second electrode region 222B and the first electrode layer 221 are configured to apply a driving signal of a second transmitting frequency to the second region 21B of the piezoelectric material layer 21 in common, so as to drive the second region 21B to transmit an ultrasonic signal of the second transmitting frequency. For example, the second electrode region 222B and the first electrode layer 221 may be used to apply a 60KHz driving signal to the second region 21B of the piezoelectric material layer 21 in common.
Referring to fig. 9, fig. 9 is a schematic structural diagram of a second electrode layer in an ultrasonic sensor provided in an embodiment of the present application.
It is understood that the second electrode layer 222 may include a plurality of electrodes 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 an ultrasonic signal.
The first electrode area 222A of the second electrode layer 222 includes a plurality of first electrodes 2221 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 point connected in the first area 21A to vibrate to generate an ultrasonic signal.
The second electrode region 222B of the second electrode layer 222 includes a plurality of second electrodes 2222 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 region 21B to drive the point connected in the second region 21B to vibrate to generate an ultrasonic signal.
Referring to fig. 10, fig. 10 is a schematic structural diagram of a first electrode layer in an ultrasonic sensor according to an embodiment of the present disclosure.
It is understood that the first electrode layer 221 may also include a plurality of electrodes electrically insulated from each other. For example, as shown in fig. 10, the first electrode layer 221 includes a plurality of third electrodes 2211 electrically insulated from each other. Each of the third electrodes 2211 is connected to the piezoelectric material layer 21. Here, the plurality of third electrodes 2211 have the same potential, so that the first electrode layer 221 may be formed as an equipotential layer.
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 opposite to the position of one second electrode 2222. Each of the third electrodes 2211 and the first electrode 2221, and the portion 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 of the third electrode 2211 and the second electrode 2222 and the portion of the piezoelectric material layer 21 between the third electrode 2211 and the second electrode 2222 can also be understood as an ultrasonic sensor pixel. That is, each of the ultrasonic sensor pixel points includes a portion of the piezoelectric material layer 21, the third electrode 2211 connected to the portion, and the first electrode 2221 or the second electrode 2222 connected to the portion. Therefore, by controlling the electric potential of each third electrode 2211, each first electrode 2221 and each second electrode 2222, the control of each pixel point of the ultrasonic sensor can be realized.
It is understood that the ultrasonic sensor 20 may further include a control chip. The control chip is connected to the electrode layer 22 of the ultrasonic sensor 20. The control chip is used for controlling a driving signal applied to the piezoelectric material layer 21 by the electrode layer 22.
Referring to fig. 11, fig. 11 is a schematic view illustrating a connection relationship between a control chip and a first electrode layer and a second electrode layer in an ultrasonic sensor according to an embodiment of the present disclosure.
The ultrasonic sensor 20 includes a control chip 23. The control chip 23 is connected to the first electrode layer 221 and the second electrode layer 222 of the electrode layer 22, respectively.
For example, as shown in FIG. 11, the control chip 23 passes through x1、x2、x3、……、xiThe same line is connected to each of the third electrodes 2211 on the first electrode layer 221 to control the potential of each of the third electrodes 2211. Wherein, as can be appreciated, x1、x2、x3、……、xiEach of the lines may be simultaneously connected to the plurality of third electrodes 2211, so that the number of lines between the control chip 23 and the first electrode layer 221 may be reduced. The lines may be, for example, printed wires.
Similarly, the control chip 23 passes through y1、y2、y3、……、yjThe lines are connected to each first electrode 2221 and each second electrode 2222 on the second electrode layer 222, so as to control the potential of each first electrode 2221 and each second electrode 2222. Wherein, as can be appreciated, y1、y2、y3、……、yjEach of the lines may be connected to the plurality of first electrodes 2221 at the same time or connected to the plurality of second electrodes 2222 at the same time, so that the number of lines between the control chip 23 and the second electrode layer 222 may be reduced. The lines may also be printed wires.
It is understood that, in the electronic device 100 described above, the display screen 10 and the ultrasonic sensor 20 may be integrated together. That is, the ultrasonic sensor 20 may be integrated in the display screen 10.
Referring to fig. 12 and 13, fig. 12 is a schematic structural diagram of a second electronic device according to an embodiment of the present disclosure, and fig. 13 is a sectional view of the electronic device shown in fig. 12 along a direction P2-P2.
The electronic device 100 includes a display screen 10, a middle frame 30, a circuit board 40, a battery 50, and a rear 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 are described below, and the above description may be referred to for the same points, and will not be repeated herein. The middle frame 30, the circuit board 40, the battery 50 and the rear cover 60 can also refer to the above description, and are not described herein again.
Referring to fig. 14, fig. 14 is a schematic view of a first structure of the display screen 10 according to the embodiment of the present application.
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, which are stacked.
The second substrate layer 15 is provided 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 a glass substrate, for example, and the second substrate layer 15 may also be a glass substrate, for example.
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 images, texts, etc., so as to realize the display function of the display screen 10.
The display screen 10 may be a liquid crystal display screen. At this time, the display layer 12 includes liquid crystal, or the display layer 12 is understood to be a liquid crystal layer. The display screen 10 may 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 layer of piezoelectric material 13 is disposed between the first substrate layer 11 and the second substrate layer 15. The piezoelectric material layer 13 is used for transmitting an ultrasonic signal of a first transmitting frequency and an ultrasonic signal of a second transmitting frequency. The ultrasonic signal of the first transmission frequency is used to transmit through at least the first substrate layer 11 or the second substrate layer 15 to achieve distance detection. The ultrasonic signal of the second transmitting frequency is used to transmit through at least the first substrate layer 11 or the second substrate layer 15 for fingerprint recognition.
For example, when the display screen 10 displays information, if the first substrate layer 11 is a surface facing a user, the ultrasonic signal of the first transmitting frequency transmits through the first substrate layer 11 to implement distance detection, and the ultrasonic signal of the second transmitting frequency transmits through the first substrate layer 11 to implement fingerprint identification; if the second substrate layer 15 is a surface facing a user, the ultrasonic signal of the first transmitting frequency penetrates through the second substrate layer 15 to realize distance detection, and the ultrasonic signal of the second transmitting frequency penetrates through the second substrate layer 15 to realize fingerprint identification.
The specific structure and function of the piezoelectric material layer 13 can be referred to the above description of the piezoelectric material layer 21 in the ultrasonic sensor 20, and will not be described in detail 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.
The electrode layer 14 is arranged 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 above description of the electrode layer 22 in the ultrasonic sensor 20, and will not be described in detail here.
Referring to fig. 15, fig. 15 is a schematic view of a second structure of a display screen according to an embodiment of the present application.
It is 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 a surface facing a user, the ultrasonic signal of the first emission frequency penetrates through the display layer 12, the first electrode layer 141 and the first substrate layer 11 to realize distance detection, and the ultrasonic signal of the second emission frequency penetrates through the display layer 12, 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 a surface facing a user, the ultrasonic signal with the first transmitting frequency transmits through the second electrode layer 142 and the second substrate layer 15 to realize distance detection, and the ultrasonic signal with the second transmitting frequency transmits through the second electrode layer 142 and the second substrate layer 15 to realize fingerprint identification.
The first electrode layer 141 may refer to the description of the first electrode layer 221 in the ultrasonic sensor 20, and the second electrode layer 142 may refer to the description of the second electrode layer 222 in the ultrasonic sensor 20, which are not described herein again.
It is understood that the positions of the display layer 12 and the piezoelectric material layer 13 in the display screen 10 may be interchanged.
Referring to fig. 16, fig. 16 is a schematic structural diagram of a display screen according to 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 disposed 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 a surface facing a user, the ultrasonic signal with the first transmitting frequency penetrates through the first electrode layer 141 and the first substrate layer 11 to realize distance detection, and the ultrasonic signal with the second transmitting frequency penetrates 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 a surface facing a user, the ultrasonic signal of the first emission frequency penetrates through the display layer 12, the second electrode layer 142 and the second substrate layer 15 to realize distance detection, and the ultrasonic signal of the second emission frequency penetrates through the display layer 12, the second electrode layer 142 and the second substrate layer 15 to realize fingerprint identification.
The display screen 10 provided by the embodiment of the application can realize the distance detection function and the fingerprint identification function at the same time. Moreover, when the distance detection and the fingerprint identification are realized by the display screen 10, the detection and the identification are performed through the ultrasonic signal, and the ultrasonic signal can penetrate through the display screen 10, so that a non-display area does not need to be separately arranged on the display screen 10, the area of the non-display area on the display screen 10 can be reduced, and the screen occupation ratio of the display screen can be improved.
Referring to fig. 17, fig. 17 is a schematic view of an application scenario of the electronic device for distance detection according to the embodiment of the present application.
When the electronic device needs to perform distance detection, for example, the electronic device is in a call-making scene, a voice call scene, a voice playing message, or the like, 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 transmit an ultrasonic signal at a first transmission frequency. The ultrasonic signal, when contacting an obstacle (e.g., a user's face), generates a reflected signal that is transmitted to the electronic device where it is received by the piezoelectric material layer. The electronic device can detect the distance between the obstacle and the electronic device according to the intensity of the received reflected signal. Alternatively, the electronic device may obtain the distance between the obstacle and the electronic device based on 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 19, fig. 18 is a schematic view of an application scenario of the electronic device for performing fingerprint identification according to the embodiment of the present application, and fig. 19 is a schematic view of a principle of the electronic device for performing fingerprint identification according to the embodiment of the present application.
Wherein, when the user's finger touches or presses on the surface of the electronic device (for example, the surface of the display screen), 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 the ultrasonic signal of the second emission frequency. When the ultrasonic wave signal contacts with a finger, a reflection signal is generated. The reflected signal is in turn received by the layer of piezoelectric material. And then, the electronic equipment converts the received reflection signal into a corresponding electric signal, and the fingerprint image of the finger of the user can be obtained.
It will be appreciated that the finger surface presents a fingerprint pattern formed by areas of relief. Therefore, when the ultrasonic signals are reflected by different areas of the fingerprint pattern to form reflected signals, the intensity of the reflected signals is different, and the intensity of the reflected signals received by the piezoelectric material layer at different parts of the finger is also different. Therefore, the electronic equipment can acquire the concave-convex degrees of different parts of the finger according to the intensity of the reflected signals of the different parts of the finger, and the three-dimensional fingerprint image of the finger of the user can be formed.
For example, the deepest depressions in the fingerprint pattern may be referred to as fingerprint valleys, and the highest projections in the fingerprint pattern may be referred to as fingerprint ridges. When the user's finger reflects the ultrasonic signal to generate a reflection signal, the intensity of the reflection signal generated by the fingerprint valley is the weakest, and the intensity of the reflection signal generated by the fingerprint ridge is the strongest. The electronic equipment can identify the fingerprint valley and fingerprint ridge on the finger according to the received reflected signal intensity generated by different parts of the finger.
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 executes the ultrasonic fingerprint identification method according to any one of the above embodiments.
It should be noted that, all or part of the steps in the methods of the above embodiments may be implemented by hardware related to instructions of a computer program, which may be stored in a computer-readable storage medium, which may include, but is not limited to: read Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disks, and the like.
The ultrasonic processing method, the ultrasonic processing apparatus, the storage medium, and the electronic device according to the embodiments of the present application are described in detail above. The principles and implementations of the present application are described herein using specific examples, which are presented only to aid in understanding the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims (7)

1. An ultrasonic processing method is applied to electronic equipment, and is characterized in that the electronic equipment comprises an ultrasonic sensor and a display screen, wherein the ultrasonic sensor is arranged below a display area of the display screen without arranging a non-display area; the method comprises the following steps:
controlling the ultrasonic sensor to transmit a third ultrasonic signal at a third transmission frequency;
receiving a third reflection signal of the third ultrasonic signal reflected by the barrier, and acquiring a user contact state according to the third reflection signal;
selecting an antenna which is not blocked by holding and controlling the display direction of the display screen according to the contact state, and determining the position of the collected fingerprint or determining the relative position relation between the electronic equipment and a user;
acquiring corresponding ultrasonic sensors according to the fingerprint collecting positions or the relative position relation, wherein the ultrasonic sensors at other positions do not transmit and receive ultrasonic information;
acquiring a current mode;
if the current mode is a first mode, controlling the ultrasonic sensor corresponding to the fingerprint acquisition position to transmit a first ultrasonic signal with a first transmitting frequency, wherein the third transmitting frequency is less than the first transmitting frequency; the first mode is that the current application needs to acquire fingerprint information;
receiving a first reflection signal of the first ultrasonic signal reflected by the barrier, and acquiring target fingerprint information according to the first reflection signal;
if the current mode is a second mode, controlling the ultrasonic sensor corresponding to the relative position relationship to transmit a second ultrasonic signal with a second transmitting frequency, wherein the second transmitting frequency is smaller than the first transmitting frequency, and the third transmitting frequency is larger than the second transmitting frequency; the second mode is that the current application needs to acquire distance information;
and receiving a second reflection signal of the second ultrasonic signal reflected by the barrier, and acquiring target distance information according to the second reflection signal.
2. The method of claim 1, wherein the acquiring the current mode comprises:
if the current mode is in the breath screen state, determining that the current mode is a second mode;
after the target distance information is obtained according to the second reflection signal, the method further includes:
judging whether an object is shielded on the display screen of the electronic equipment or not according to the distance information;
if the electronic equipment display screen is not shielded, displaying fingerprint prompt information in a first area of the electronic equipment display screen, and controlling the ultrasonic sensor to transmit a first ultrasonic signal with a first transmitting frequency;
within a preset time period, receiving a first reflection signal of the first ultrasonic signal reflected by an obstacle, and determining whether target fingerprint information is acquired according to the first reflection signal;
and if the target fingerprint information is not acquired within the preset time period, controlling the ultrasonic sensor to transmit a second ultrasonic signal at a second transmitting frequency.
3. The ultrasonic processing method according to claim 2, wherein after controlling the ultrasonic sensor to transmit a second ultrasonic signal at a second transmission frequency if the target fingerprint information is not acquired within the preset time period, the method further comprises:
if the electronic equipment is detected to shake, controlling the ultrasonic sensor to transmit a first ultrasonic signal with a first transmitting frequency;
or
And if the fact that the display screen of the electronic equipment is shielded by an object is detected, controlling the ultrasonic sensor to transmit a first ultrasonic signal with a first transmitting frequency.
4. The ultrasonic processing method according to claim 2 or 3, wherein after determining whether the electronic device display screen is blocked by an object according to the distance information, the method further comprises:
if the shielding exists, controlling the ultrasonic sensor to transmit a first ultrasonic signal with a first transmitting frequency;
receiving a first reflection signal of the first ultrasonic signal reflected by the barrier, and determining whether target fingerprint information is acquired according to the first reflection signal;
if the target fingerprint information is acquired, controlling a display screen of the electronic equipment to be bright;
and if the target fingerprint information is not acquired, controlling the ultrasonic sensor to transmit a second ultrasonic signal at a second transmitting frequency.
5. An ultrasonic processing device is applied to electronic equipment, and is characterized in that the electronic equipment comprises an ultrasonic sensor and a display screen, wherein the ultrasonic sensor is arranged below a display area of the display screen without arranging a non-display area; the device comprises:
a determination module for controlling the ultrasonic sensor to transmit a third ultrasonic signal at a third transmission frequency; receiving a third reflection signal of the third ultrasonic signal reflected by the barrier, and acquiring a user contact state according to the third reflection signal; selecting an antenna which is not blocked by holding and controlling the display direction of the display screen according to the contact state, and determining the position of the collected fingerprint or determining the relative position relation between the electronic equipment and a user; acquiring corresponding ultrasonic sensors according to the fingerprint collecting positions or the relative position relation, wherein the ultrasonic sensors at other positions do not transmit and receive ultrasonic information;
the first acquisition module is used for acquiring a current mode;
the first transmitting module is used for controlling the ultrasonic sensor corresponding to the fingerprint collecting position to transmit a first ultrasonic signal with a first transmitting frequency if the current mode is the first mode, and the third transmitting frequency is smaller than the first transmitting frequency; the first mode is that the current application needs to acquire fingerprint information;
the second acquisition module is used for receiving a first reflection signal of the first ultrasonic signal reflected by the barrier and acquiring target fingerprint information according to the first reflection signal;
the second transmitting module is configured to control the ultrasonic sensor corresponding to the relative position relationship to transmit a second ultrasonic signal with a second transmitting frequency if the current mode is a second mode, where the second transmitting frequency is smaller than the first transmitting frequency, and the third transmitting frequency is greater than the second transmitting frequency; the second mode is that the current application needs to acquire distance information;
and the third acquisition module is used for receiving a second reflection signal of the second ultrasonic signal reflected by the obstacle and acquiring target distance information according to the second reflection signal.
6. A storage medium in which a computer program is stored, which, when run on a computer, causes the computer to execute the ultrasonic processing method according to any one of claims 1 to 4.
7. An electronic device, characterized in that the electronic device comprises a processor and a memory, the memory having stored therein a computer program, the processor being configured to execute the ultrasound processing method of any of claims 1 to 4 by retrieving the computer program stored in the memory.
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