CN110298288B

CN110298288B - Display screen, electronic equipment and control method thereof

Info

Publication number: CN110298288B
Application number: CN201910550332.XA
Authority: CN
Inventors: 郑超; 吴安平; 杨乐
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2023-04-07
Anticipated expiration: 2039-06-24
Also published as: CN110298288A

Abstract

The embodiment of the application provides a display screen, electronic equipment and a control method of the electronic equipment, wherein the electronic equipment comprises a shell and the display screen arranged on the shell, the display screen comprises a first substrate, a second substrate, a display layer, an ultrasonic sensor and a drive circuit, and the display layer is arranged between the first substrate and the second substrate; the ultrasonic sensor is arranged between the first substrate and the second substrate; and the driving circuit is respectively electrically connected with the display layer and the ultrasonic sensor, and is used for driving the display layer to display pictures and driving the ultrasonic sensor to perform fingerprint identification. According to the embodiment of the application, fingerprint identification in the screen can be realized through the ultrasonic sensor.

Description

Display screen, electronic equipment and control method thereof

Technical Field

The present disclosure relates to electronic technologies, and in particular, to a display screen, an electronic device, and a control method thereof.

Background

With the development of electronic technology, electronic devices such as smart phones are used more and more frequently in the life of users. For example, a user may implement a social function, a shopping function, a payment function, a data transfer function, and so on, through the electronic device. The display screen of the electronic device can be used for displaying pictures.

Disclosure of Invention

The embodiment of the application provides a display screen, electronic equipment and a control method thereof, which can realize fingerprint identification in the display screen.

The embodiment of the application provides a display screen, includes:

a first substrate;

a second substrate;

a display layer disposed between the first substrate and the second substrate;

an ultrasonic sensor disposed between the first substrate and the second substrate; and

the drive circuit is respectively electrically connected with the display layer and the ultrasonic sensor, and is used for driving the display layer to display pictures and driving the ultrasonic sensor to perform fingerprint identification.

An embodiment of the present application provides an electronic device, including:

a housing;

the display screen is as above, the display screen sets up on the casing.

An embodiment of the present application provides a method for controlling an electronic device, where the electronic device includes:

a display screen as described above;

the method comprises the following steps:

receiving a fingerprint identification instruction through the display screen;

and performing fingerprint identification through the ultrasonic sensor according to the fingerprint identification instruction.

In the embodiment of the application, can realize fingerprint identification through setting up at the inside ultrasonic sensor of display screen, need not to set up ultrasonic sensor in other positions, not only the space of rational utilization display screen. Simultaneously, ultrasonic sensor sets up and compares the setting in the inside display screen that the non-display surface of display screen is closer to the display surface, and the user of being more convenient for carries out fingerprint identification, improves fingerprint identification's accuracy.

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 structural diagram of an electronic device according to an embodiment of the present application.

Fig. 2 is a cross-sectional view of an ultrasonic sensor in an electronic device according to an embodiment of the present application.

Fig. 3 is a first cross-sectional view of the display screen of the electronic device of fig. 1 taken along the direction Q-Q.

Fig. 4 is a schematic structural diagram of a driving circuit in a display screen according to an embodiment of the present application.

Fig. 5 is a second cross-sectional view of the display screen of the electronic device of fig. 1 taken along the direction Q-Q.

Fig. 6 is a third cross-sectional view of the display screen of the electronic device of fig. 1 taken along the direction Q-Q.

Fig. 7 is a schematic structural view of a negative electrode layer in the ultrasonic sensor shown in fig. 3.

Fig. 8 is a fourth cross-sectional view of the display screen of the electronic device of fig. 1 taken along the direction Q-Q.

Fig. 9 is a schematic diagram illustrating a principle of fingerprint recognition performed by an ultrasonic sensor according to an embodiment of the present application.

Fig. 10 is a schematic view of a scene of fingerprint recognition performed by the ultrasonic sensor according to the embodiment of the present application.

Fig. 11 is another schematic diagram of an ultrasonic sensor for fingerprint recognition according to an embodiment of the present disclosure.

Fig. 12 is a schematic diagram illustrating a change of a reflection signal received by an ultrasonic sensor in an electronic device according to an embodiment of the present application.

Fig. 13 is a block diagram of an electronic device provided in an embodiment of the present application.

Fig. 14 is a flowchart illustrating a control method of 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 structural diagram of an electronic device according to an embodiment of the present disclosure. The electronic device 10 includes a display 11, a cover plate 12, a center frame 13, a circuit board 14, a battery 15, and a rear cover 16.

The display screen 11 may be mounted on the middle frame 13 and connected to the rear cover 16 through the middle frame 13 to form a display surface of the electronic device 10 for displaying information such as images and texts. Meanwhile, the display screen 11 may serve as a front case of the electronic device 10. The Display screen 11 may be a Liquid Crystal Display (LCD) or an Organic Light-Emitting Diode (OLED) Display screen.

A cover plate 12 may be mounted on the middle frame 13, and the cover plate 12 covers the display screen 11 to protect the display screen 11 from being scratched or damaged by water. The cover 12 may be a transparent glass cover, so that a user can see the contents displayed on the display screen 11 through the cover 12. It will be appreciated that the cover plate 12 may be a glass cover plate of sapphire material.

The middle frame 13 may have a thin plate-like or sheet-like structure, or may have a hollow frame structure. The middle frame 13 is used for providing a supporting function for the electronic components or functional components in the electronic device 10, so as to mount the electronic components or functional components in the electronic device together.

The display screen 11, the middle frame 13 and the rear cover 16 may together form a housing of the electronic device 10, for accommodating or mounting electronic components, functional components and the like of the electronic device. For example, functional components such as a camera, a receiver, a circuit board, a sensor, and a battery in the electronic apparatus may be mounted on the center frame 13 to be fixed. It is understood that the material of the middle frame 13 may include metal or plastic.

The circuit board 14 may be mounted on the middle frame 13. The circuit board 14 may be a motherboard of the electronic device 10. A ground point is provided on the circuit board 14 to ground the circuit board 14. One or more of the functional components of a microphone, a speaker, a receiver, an earphone interface, a camera, an acceleration sensor, an ambient light sensor, a gyroscope, and a processor may be integrated on the circuit board 14. Meanwhile, the display screen 11 may be electrically connected to the circuit board 14.

The battery 15 may be mounted on the middle frame 13. Meanwhile, the battery 15 is electrically connected to the circuit board 14 to enable the battery 15 to power the electronic device 10. Among other things, the circuit board 14 may have power management circuitry disposed thereon. The power management circuit is used to distribute the voltage provided by the battery 15 to the various electronic components in the electronic device 10.

The rear cover 16 may be integrally formed. In the molding process of the rear cover 16, a rear camera hole or the like may be formed in the rear cover 16.

It will be appreciated that a fingerprint recognition sensor may be provided in the electronic device 10. In the embodiment of the application, the fingerprint identification sensor is realized by an ultrasonic sensor. The ultrasonic sensor may be disposed inside the electronic device 10, for example, the ultrasonic sensor may be mounted on a center frame 13 of the electronic device 10. The ultrasonic sensor is used for collecting the fingerprint of the user and identifying the fingerprint of the user, so that the safety of the user using the electronic equipment is guaranteed.

Referring to fig. 2, fig. 2 is a cross-sectional view of an ultrasonic sensor 20 in the electronic device 10 according to the embodiment of the present disclosure. Among them, the ultrasonic sensor 20 includes a negative electrode layer 21, a piezoelectric material layer 22, and a positive electrode layer 23. The negative electrode layer 21, the piezoelectric material layer 22, and the positive electrode layer 23 are laminated in this order.

The negative electrode layer 21 and the positive electrode layer 23 constitute two electrodes of the piezoelectric material layer 22, so that a voltage can be applied to the piezoelectric material layer 22 through the negative electrode layer 21 and the positive electrode layer 23. Wherein the positive electrode layer 23 may be a silver paste layer.

The piezoelectric material layer 22 is used to generate an ultrasonic signal and receive a reflected signal of an obstacle. Wherein the piezoelectric material layer 22 comprises a piezoelectric material, which may be, for example, a piezoelectric ceramic.

When an ac voltage is applied to the piezoelectric material layer 22, for example, a high-frequency oscillation signal is applied to the piezoelectric material layer 22, the piezoelectric material layer 22 generates an ultrasonic signal and emits the ultrasonic signal to the outside. When no voltage is applied to the piezoelectric material layer 22, the piezoelectric material layer 22 may receive an ultrasonic signal reflected by an external obstacle, and convert the received reflected signal into a corresponding electrical signal, thereby implementing identification of the reflected signal.

It is understood that a control circuit layer may be provided, which may control the ultrasonic sensor 20, for example, control the ultrasonic sensor 20 to emit an ultrasonic signal and control the ultrasonic sensor 20 to receive a reflection signal of an obstacle. Such as a control circuit layer, may include a plurality of Thin Film Transistors (TFTs) and a connection circuit between the TFTs.

It should be noted that the ultrasonic sensor 20 may be fixed on the electronic device 10 through other media, such as a fixing layer, which is used to fix the ultrasonic sensor 20, so as to implement the installation of the ultrasonic sensor 20 in the electronic device 10. For example, the fixing layer 25 may be a colloidal layer.

It will be appreciated that the ultrasonic sensor may also be integrated into the display screen 11 of the electronic device 10 in order to reduce the occupation of the internal space of the electronic device by the ultrasonic sensor or to enhance the intensity of the ultrasonic signal emitted from the ultrasonic sensor to the outside.

Referring to fig. 3, fig. 3 is a first cross-sectional view of the display screen 11 in the electronic device 10 shown in fig. 1 along the direction Q-Q. Wherein the ultrasonic sensor 20 is integrated in the display screen 11. The display screen 11 may include a first substrate 111, a second substrate 112, a display layer 113, an ultrasonic sensor 20, and a driving circuit 114.

The first substrate 111 may be a glass substrate, such as the first substrate 111 being an upper glass substrate. When the Display 11 is a Liquid Crystal Display (LCD), the first substrate 111 may be a color filter substrate of the Display 111. When the display panel 11 is an Organic Light-Emitting Diode (OLED) display panel, the first substrate 111 may be a glass cover plate of the display panel 111.

The second substrate 112 may be a glass substrate, such as the second substrate 112 being a lower glass substrate. When the Display 11 is a Liquid Crystal Display (LCD), the second substrate 112 may serve as an array substrate of the Display 111. When the display panel 11 is an Organic Light-Emitting Diode (OLED) display panel, the second substrate 112 may be arranged with a circuit to drive the display panel 11.

The display layer 113 is disposed between the first substrate 111 and the second substrate 112, and the display layer 113 is used to emit light or transmit light, so that the display panel 11 displays information. When the display panel 11 is a liquid crystal display panel, the display layer 113 may include a liquid crystal layer; when the display panel 11 is an organic light emitting diode display panel, the display layer 113 may include an organic light emitting layer.

The driving circuit 114 may include driving chips, traces, switches, and the like. The driving circuit 114 may be disposed on the second substrate 112, such as the length of the second substrate 112 is greater than the length of the first substrate 111 and the display layer 113, to form a placement platform, at least a portion of the driving circuit 114 may be placed at the placement platform, the driving circuit 114 may be wound from the placement platform to the non-display surface of the display screen 11 through a signal line to be electrically connected to the circuit board 14 inside the electronic device 10, and the driving circuit 114 may be controlled by a processor on the circuit board 14. It should be noted that traces or other devices may be arranged at other positions of the second substrate 112.

The driving circuit 114 may be electrically connected to the display layer 113, and the driving circuit 114 may drive the display layer 113 to display a picture. The processor such as the electronic device 10 controls the driving circuit 114 to drive the display layer 113 to display a picture.

The driving circuit 114 may be electrically connected to the ultrasonic sensor 20, and the driving circuit 114 may drive the ultrasonic sensor 20 to perform fingerprint recognition, that is, the driving circuit 114 may drive the ultrasonic sensor 20 to transmit an ultrasonic signal and receive an ultrasonic signal fed back by an obstacle, such as a finger. Such as the processor of the electronic device 10, controls the driving circuit 114 to drive the ultrasonic sensor 20 for fingerprint recognition.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a driving circuit in a display panel according to an embodiment of the present disclosure. The driving circuit 114 may include a driving chip 1141, a display driving circuit 1142, and a fingerprint driving circuit 1143. The driving chip 1141 is electrically connected to the display driving circuit 1142 and the fingerprint driving circuit 1143, and the driving chip 1141 can control the display driving circuit 1142 and the fingerprint driving circuit 1141. The driving chip 1141 may have a plurality of data transmission interfaces 11411 thereon, such as 1080 data transmission interfaces 11411 electrically connected to the display driving circuit 1142 and the fingerprint driving circuit 1143. Of course, the number of the data transmission interfaces 11411 is not limited thereto, and may be other numbers.

The display driving circuit 1142 is provided with a display switch 1147, one end of the display switch 1147 is connected to the data transmission interface 11411 of the driving chip 1141, and the other end of the display switch 1147 is electrically connected to the display data line 1145. A display switch 1147 may be connected to a display data line 1145. Three display switches 1147 may be connected to one data transmission interface 11411 and six display switches 1147 may be connected to one data transmission interface. Of course, other numbers of display switches 1147 may be connected to the data transmission interface 11411. The display driving circuit 1142 may drive the plurality of display switches 1147 connected to the same data transmission interface 11411 one by one to turn on sequentially.

The fingerprint driving circuit 1143 is provided with an ultrasonic switch 1148, one end of the ultrasonic switch 1148 is connected to the data transmission interface 11411 of the driving chip 1141, and the other end of the ultrasonic switch 1148 is electrically connected to the ultrasonic data line 1146. An ultrasonic switch 1148 may be electrically connected to an ultrasonic data line 1146. Three ultrasonic switches 1148 may be connected to one data transmission interface 11411, and six ultrasonic switches 1148 may be connected to one data transmission interface 11411. Of course, other numbers of ultrasonic switches 1148 may be connected to the data transmission interface 11411. The fingerprint driving circuit 1143 may drive the plurality of ultrasonic switches 1148 connected to the same data transmission interface 11411 one by one to be turned on in sequence.

In some embodiments, the number of ultrasonic switches 1148 may be the same as the number of display switches 1147. The number of ultrasonic data lines 1146 may be the same as the number of display data lines 1145.

The scan line driving circuit 1144 may be connected to a plurality of scan lines 1149, each scan line 1149 may be connected to a plurality of first control switches such as TFT switches and a plurality of second switches such as TFT switches, and each scan line 1149 may be connected to all display data lines through the plurality of first control switches. And each of the scanning lines 1149 may be electrically connected to all of the ultrasonic data lines through a plurality of second control switches. That is, one scanning line 1149 may be connected to the plurality of first control switches and the plurality of second switches, and one scanning line 1149 may be connected to all the display data lines 1145 and all the ultrasonic data lines 1146 through the plurality of first switches and the plurality of second switches, so as to control the display driving circuit 1142 to drive the display layer 113 to display a picture, and control the fingerprint driving circuit 1143 to drive the ultrasonic sensor 20 to perform fingerprint identification.

The ultrasonic sensor 20 may be disposed between the first substrate 111 and the second substrate 112, and the ultrasonic sensor 20 may be disposed to be stacked on the display layer 113. Such as the first substrate 111, the display layer 113, the positive electrode layer 21, the piezoelectric material layer 22, the negative electrode layer 23, and the second substrate 112 are sequentially stacked. It should be noted that the arrangement relationship between the ultrasonic sensor 20 and the display layer 113 in the display screen 11 is not limited to this.

Referring to fig. 5, fig. 5 is a second cross-sectional view of the display screen 11 of the electronic device 10 shown in fig. 1 along a direction Q-Q. The first substrate 111, the positive electrode layer 21, the display layer 113, the piezoelectric material layer 22, the negative electrode layer 23, and the second substrate 112 may be sequentially stacked.

Referring to fig. 6, fig. 6 is a third cross-sectional view of the display screen 11 of the electronic device 10 shown in fig. 1 along the QQ direction. The positive electrode layer 21, the first substrate 111, the display layer 113, the piezoelectric material layer 22, the negative electrode layer 23, and the second substrate 112 may be sequentially stacked. Note that, a transparent cover plate is usually provided on the display panel 11, and the cover plate may be provided on the positive electrode layer 21.

The size of the ultrasonic sensor 20 may be adapted to the size of the display layer 113, such as the size of the area of the ultrasonic sensor 20 on the display surface of the electronic device 10 is adapted to the size of the display area of the display layer 113. In other words, the area of the ultrasonic sensor 20 on the display surface of the display panel 11 is close to or the same as the area of the display layer 113 on the display surface of the display panel 11. Thereby full screen fingerprint identification can be realized. The ultrasonic sensor 20 may be provided in a certain region or a plurality of regions of the display panel 11.

The positive electrode layer 21 may be a unitary structure, such as a layer structure formed by laying the positive electrode layer 21 with silver paste. Here, the piezoelectric material layer 22 may be disposed below the positive electrode layer 21 or below the display layer 113 using a piezoelectric ceramic. Here, the negative electrode layer 23 may be disposed below the layer of piezoelectric material 22. The negative electrode layer 23 may be formed of a plurality of electrode channels (ultrasonic sensors), such as the negative electrode layer 23 may include tens of thousands, hundreds of thousands, or millions of negative electrode channels.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a negative electrode layer in the ultrasonic sensor shown in fig. 3. Fig. 7 is a partial structural view of only the negative electrode layer. The negative electrode layer 23 may include a plurality of electrode blocks 231, such as the negative electrode layer 23 may include hundreds, thousands of electrode blocks 231. The respective electrode blocks 231 may be arranged in a matrix manner. Each electrode block 231 is electrically connected to the fingerprint driving circuit 1142 through an ultrasonic data line 1146. If the number of the ultrasonic data lines 1146 is 540 × 6, the number of the electrode blocks 231 may be 3240. The number of the electrode blocks 231 may be other numbers.

The electrode blocks 231 are spaced apart from each other, such as in an array. The electrode block 231 may be rectangular in shape, such as a rectangle, and may have a length of 4 mm to 5 mm. Although the size is not limited thereto. The electrode block 231 may have a circular shape, and may have a diameter of 4 mm to 5mm, etc. Of course, the shape of the electrode block 231 may also be other shapes, such as an oval or other shapes.

In some embodiments, the size of the electrode pads 231 may be similar to the size of the display pixels in the display layer 113. The electrode blocks 231 are not in the same layer as the display pixels in the display layer 113. The size of the electrode block 231 may be the same as the size of the display layer 113, such as the electrode block 231 may be provided in a transparent structure, and the electrode block 231 and the display pixels may be stacked. Of course, if the electrode block 231 is not configured to be transparent, the electrode block 231 and the display pixels may be staggered, or alternatively configured, or the electrode block 231 and the display pixels may not be overlapped in a direction perpendicular to the display screen 11, so as to avoid the electrode block 231 shielding the display pixels.

The piezoelectric material layer 22 and the portion of the positive electrode layer 21 corresponding to one negative electrode layer 23 may form one multiplex electrode. The multiplexing electrode can be used for detecting the touch operation of the display screen 11. It is understood that the multiplexing electrode detects the touch operation of the display screen 11 to detect the touch position of the display screen 11.

Referring to fig. 8, fig. 8 is a fourth cross-sectional view of the display screen 11 of the electronic device 10 shown in fig. 1 along the direction Q-Q. The ultrasonic sensor 20 may include a plurality of multiplexing electrodes 24, and the multiplexing electrodes 24 may include an electrode block 231, a portion of the piezoelectric material layer 22, and a portion of the positive electrode layer 21. Such as a multiplex electrode 24, may include an electrode block 231 and portions of the piezoelectric material layer 22 and the positive electrode layer 21 corresponding to the electrode block 231. That is, one electrode block 231 and the portion of the piezoelectric material layer and the portion of the positive electrode layer corresponding to the electrode block 231 form one multiplex electrode 24.

Therefore, the embodiment of the present application can implement the detection of the touch operation of the display screen 11 through one or more multiplexing electrodes 24. Such as drive circuit 114, may drive one or more multiplexing electrodes 24 to detect touch operations of display screen 11.

Therefore, the display function, the touch function and the fingerprint identification function can be realized by arranging the display layer 11 and the ultrasonic sensor 20 in the display screen 11. Compared with a display screen which is provided with a touch module and an ultrasonic sensor in the display screen 11 to realize a touch function and a fingerprint identification function, the thickness of the display screen can be reduced.

It will be appreciated that the display 11 may also include one or more polarizers. The polaroid is also used for realizing the display function of the display screen. For example, the polarizer is used to polarize light emitted from the display screen.

Referring to fig. 9, fig. 9 is a schematic diagram illustrating a principle of fingerprint recognition by an ultrasonic sensor according to an embodiment of the present application.

Wherein, when the user's finger touches or presses on the surface of the electronic device (e.g. the surface of the display screen), the electronic device controls the ultrasonic sensor to emit the ultrasonic signal towards the direction of the finger. When the ultrasonic wave signal contacts with a finger, a reflection signal is generated. The reflected signal is reflected to the ultrasonic sensor and received by the ultrasonic sensor. And then, the ultrasonic sensor 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 signal is reflected by different areas of the fingerprint pattern to form a reflected signal, the intensity of the reflected signal is different, and the intensity of the reflected signal received by the ultrasonic sensor at different parts of the finger is also different. Therefore, the ultrasonic sensor can obtain the concave-convex degree of different parts of the finger according to the intensity of the reflected signal of different parts of the finger, and a 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 ultrasonic sensor can identify fingerprint valleys and fingerprint ridges on the finger according to the received intensity of the reflected signals generated by different parts of the finger.

Referring to fig. 10, 11, and 12, fig. 10 is a schematic view of a scene where an ultrasonic sensor performs fingerprint recognition according to an embodiment of the present disclosure, fig. 11 is another schematic view of an ultrasonic sensor performing fingerprint recognition according to an embodiment of the present disclosure, and fig. 12 is a schematic view of a change of a reflection signal received by the ultrasonic sensor in an electronic device according to an embodiment of the present disclosure.

It will be appreciated that the user's finger presents an epidermis layer and a dermis layer with a thickness therebetween, that is, the thickness of the epidermis layer. Although the thickness of the epidermis layer of the finger is small, for example, 0.5mm (milliseconds), it is sufficient to influence the reflection signal generated by the reflection of the ultrasonic signal by the finger.

After the ultrasonic sensor emits the ultrasonic signal, the ultrasonic signal contacts the epidermis layer of the finger of the user to generate a reflection signal, which is the epidermis layer reflection signal or is called as a first reflection signal. Meanwhile, when the ultrasonic signal is reflected by the epidermis layer of the finger, the ultrasonic signal also penetrates the epidermis layer of the finger and contacts the dermis layer of the finger, and is reflected by the dermis layer to generate a reflection signal, namely a dermis layer reflection signal, or a second reflection signal. The first reflected signal and the second reflected signal are both reflected back to the ultrasonic sensor and are received by the ultrasonic sensor.

On the other hand, since it takes a certain period of time for the ultrasound signal to transmit through the epidermis layer of the finger to the epidermis layer, and it also takes a certain period of time for the second reflection signal generated by the reflection of the dermis layer to transmit from the dermis layer to the epidermis layer, the time when the ultrasound sensor receives the first reflection signal is earlier than the time when the second reflection signal is received. That is, the time t when the ultrasonic sensor receives the first reflected signal ₁ And the time t of receiving the second reflection signal ₂ With a time interval T in between. The time period T is 2 times longer than the time period it takes for the ultrasonic signal to be transmitted from the epidermal layer to the dermal layer of the finger, as shown in fig. 12.

As can be seen from the above, the ultrasonic sensor 20 in the embodiment of the present application may be integrated inside the display screen 11 to implement the on-screen fingerprint identification and touch function. The application of the electronic device 10 using the ultrasonic sensor 20 is not limited to this. Such as electronic device 10, may utilize ultrasonic sensor 20 to enable data transmission.

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.

Referring to fig. 13, fig. 13 is a block diagram of an electronic device according to an embodiment of the present disclosure. The electronic device 10 may further include a processor 142 and a memory 144, the processor 142 and the memory 144 being electrically connected, and the processor 142 and the memory 144 may be integrated on the circuit board 14.

The memory 144 may be used for storing computer programs and data, such as for storing data to be transmitted, which may be audio data, address book data or other data. The memory 144 stores computer programs containing instructions executable in the processor 142. The computer program may constitute various functional modules.

The processor 142 is a control center of the electronic device 100, connects various parts of the entire electronic device 10 using various interfaces and lines, and performs various functions of the electronic device 10 and processes data by running or calling a computer program stored in the memory 144 and calling data stored in the memory 144, thereby performing overall monitoring of the electronic device 10. Such as the processor 142 controlling the display 12 of the electronic device 10 to display a screen, such as the processor 142 controlling the ultrasonic sensor 20 of the electronic device 10 to unlock a fingerprint, such as the processor 142 controlling the electronic device 10 to transmit data.

To further illustrate the application of the embodiment to fingerprint recognition by using an ultrasonic sensor, the following description is made in terms of a method.

The embodiment of the present application provides a control method of an electronic device, which can be applied to the electronic device 10.

Referring to fig. 14, fig. 14 is a schematic flowchart of a data transmission method according to an embodiment of the present application. With reference to fig. 1 to 13. The control method of the electronic equipment comprises the following steps:

101, receiving a fingerprint identification instruction through the display screen. The display 11 of the electronic device may receive a fingerprint identification instruction.

102, performing fingerprint identification through the ultrasonic sensor according to the fingerprint identification instruction. The processor of the electronic equipment receives and transmits ultrasonic signals through the ultrasonic sensor according to the fingerprint identification instruction, and can receive the ultrasonic signals which are shielded by the obstacles and fed back through the ultrasonic sensor according to the ultrasonic signals transmitted by the ultrasonic sensor to perform fingerprint identification.

Therefore, the embodiment of the present application can realize the functions of fingerprint identification and touch control in the screen by the ultrasonic sensor 20 integrated inside the display screen 11.

The display screen, the electronic device and the control method thereof provided by the embodiment of the application are described in detail above. The principle and the embodiment of the present application are explained by applying specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of 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

1. A display screen, comprising:

a first substrate;

a second substrate;

a display layer disposed between the first substrate and the second substrate;

the driving circuit is respectively electrically connected with the display layer and the ultrasonic sensor, and is used for driving the display layer to display a picture and driving the ultrasonic sensor to perform fingerprint identification;

wherein the driving circuit includes:

the display driving circuit is provided with a display switch, and the display switch is connected with a display data line for driving the display layer;

the fingerprint driving circuit is provided with an ultrasonic switch, and the ultrasonic switch is connected with an ultrasonic data line for driving the ultrasonic sensor;

the driving chip is electrically connected with the display driving circuit and the fingerprint driving circuit;

the scanning driving circuit is connected with the display data lines through a plurality of first control switches, and one first control switch is connected with one display data line; the scanning driving circuit is connected with the display data lines through a plurality of second control switches, and one second control switch is connected with one ultrasonic data line; the scanning driving circuit is connected with the first control switches and the second control switches, and is used for controlling the display driving circuit to drive the display layer to display pictures and controlling the fingerprint driving circuit to drive the ultrasonic sensor to perform fingerprint identification.

2. The display screen of claim 1, wherein the display switch is a single-pole multi-throw switch, and a plurality of display data lines are connected to the display switch;

the ultrasonic switch is a single-pole multi-throw switch, the ultrasonic switch is connected with three ultrasonic data lines or six ultrasonic data lines, and the ultrasonic switch is connected with a plurality of ultrasonic data lines.

3. The display screen of claim 2, wherein the number of display switches connected to the display data lines is the same as the number of ultrasonic switches connected to the ultrasonic data lines.

4. A display screen according to any one of claims 1 to 3, wherein the ultrasonic sensor comprises a negative electrode layer, a piezoelectric material layer and a positive electrode layer, and the driving circuit is further configured to control the positive electrode layer and the negative electrode layer to be conductive so as to drive the piezoelectric material layer to emit an ultrasonic signal or receive an ultrasonic signal emitted by a barrier to realize fingerprint identification.

5. A display screen as recited in claim 4, wherein the display layer includes a plurality of display pixels, the negative electrode layer includes a plurality of transparently disposed electrode blocks, the electrode blocks being disposed in correspondence with the display pixels, a size of one of the electrode blocks being substantially equal to a size of one of the display pixels.

6. A display screen according to claim 4, wherein the display layer comprises a plurality of display pixels and the negative electrode layer comprises a plurality of electrode blocks, the electrode blocks and the display pixels not overlapping in a direction perpendicular to the display screen.

7. The display panel according to claim 4, wherein the first substrate, the display layer, the positive electrode layer, the piezoelectric material layer, the positive electrode layer, and the second substrate are sequentially stacked.

8. The display panel according to claim 4, wherein the first substrate, the positive electrode layer, the display layer, the piezoelectric material layer, the negative electrode layer, and the second substrate are sequentially stacked.

9. The display panel according to claim 4, wherein the positive electrode layer, the first substrate, the display layer, the piezoelectric material layer, the negative electrode layer, and the second substrate are sequentially stacked.

10. A screen according to any one of claims 1 to 3, wherein the dimensions of the ultrasonic sensor are adapted to the dimensions of the display layer.

11. An electronic device, comprising:

a housing;

a display screen according to any one of claims 1 to 10, the display screen being provided on the housing.

12. The electronic device of claim 11, further comprising a processor electrically connected to the driving circuit, wherein the processor is configured to control the driving circuit to drive the display layer to display a picture, and the processor is configured to control the driving circuit to drive the ultrasonic sensor to perform fingerprint recognition.

13. A method for controlling an electronic device, wherein the electronic device comprises:

a display screen according to any one of claims 1 to 10;

the method comprises the following steps:

receiving a fingerprint identification instruction through the display screen;

14. The method for controlling an electronic device according to claim 13, wherein the performing fingerprint recognition by the ultrasonic sensor according to the fingerprint recognition command comprises:

receiving and transmitting ultrasonic signals through the ultrasonic sensor according to the fingerprint identification instruction;

and receiving the ultrasonic signal which is shielded by the barrier and fed back by the ultrasonic sensor according to the ultrasonic signal transmitted by the ultrasonic sensor to perform fingerprint identification.