Display device, control method thereof, and readable storage medium

Abstract

The present invention provides a control method, device, electronic device, and readable storage medium for a display device. The display device is characterized by comprising a cover plate, an optical layer, a display functional layer, a pressure-sensitive adhesive layer, and an ultrasonic functional layer which are sequentially stacked. The ultrasonic functional layer is configured to perform fingerprint recognition and touch detection. An end portion of the display functional layer includes a first wiring region, and an end portion of the ultrasonic functional layer includes a second wiring region. The first wiring region extends from the end portion of the pressure-sensitive adhesive layer towards the ultrasonic functional layer and is electrically connected to the second wiring region. The second wiring region is bonded to a driving circuit board disposed on a side of the ultrasonic functional layer away from the cover plate. Among them, the driving circuit board is used to arrange an ultrasonic driving circuit and a display driving circuit. Embodiments of the present invention can reduce the thickness and weight of the display device.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of electronic technologies, and in particular, to a display device, a control method thereof, and a readable storage medium. Background Art

[0002] With the development of electronic technologies, various wearable devices such as smart watches are widely used. These wearable devices carry a lot of user-related information, such as sports data, heart rate, blood pressure and other human health information. In order to achieve more functions, the wearable devices may need to be provided with more sensors. In order to ensure the security of this information, security modules such as fingerprint recognition and face recognition also need to be provided on the wearable devices. However, various structures such as sensors that need to be provided have a large thickness and weight, which affects the wearing of the wearable devices. Therefore, the existing wearable devices are inconvenient to use. Summary of the Invention

[0003] Embodiments of the present invention provide a display device, a control method thereof, and a readable storage medium, so as to solve the problem that the existing wearable devices are inconvenient to use.

[0004] To solve the above problems, the present invention is implemented as follows:

[0005] In a first aspect, embodiments of the present invention provide a display device, including a cover plate, an optical layer, a display function layer, a pressure-sensitive adhesive layer, and an ultrasonic function layer that are sequentially stacked. The ultrasonic function layer is configured to perform fingerprint recognition and touch detection. An end of the display function layer includes a first wiring area, and an end of the ultrasonic function layer includes a second wiring area. The first wiring area extends from an end of the pressure-sensitive adhesive layer toward the ultrasonic function layer and is electrically connected to the second wiring area. The second wiring area is bonded to a driving circuit board provided on a side of the ultrasonic function layer away from the cover plate, where the driving circuit board is used to provide an ultrasonic driving circuit and a display driving circuit.

[0006] In an embodiment, the second wiring area and the driving circuit board are bonded through a flexible circuit board. The flexible circuit board is provided at an end of the ultrasonic function layer. One end of the flexible circuit board is bonded to the second wiring area, and the other end is bonded to the driving circuit board.

[0007] In an embodiment, the ultrasonic function layer includes a driving circuit layer, a piezoelectric layer, a conductive paste layer, and a protective layer that are sequentially stacked in a direction away from the display function layer. An end of the driving circuit layer includes the second wiring area.

[0008] In one embodiment, the cover plate includes a light-transmitting area and an opaque area surrounding the light-transmitting area. The display function layer includes a display area and a non-display area surrounding the display area. The ultrasonic function layer includes an identification area. The orthographic projection of the display area on the cover plate is located within the light-transmitting area, and the light-transmitting area is within the range of the orthographic projection of the identification area on the cover plate.

[0009] In a second aspect, an embodiment of the present invention provides a control method for a display device, which is applied to a display device. The display device includes a display function layer and an ultrasonic function layer. The ultrasonic function layer is configured to perform fingerprint recognition and touch detection. The method includes the following steps:

[0010] Receiving a wake-up control input when the display device is in a sleep state;

[0011] Controlling the display device to be in a wake-up state according to the wake-up control input and controlling the ultrasonic function layer to enter a fingerprint recognition mode;

[0012] When a fingerprint input is received, controlling the display device to unlock according to the recognition result of the ultrasonic function layer for the fingerprint input.

[0013] In one embodiment, after controlling the display device to unlock according to the fingerprint recognition result of the ultrasonic function layer, the method further includes:

[0014] When the display device is unlocked, controlling the ultrasonic function layer to enter a touch recognition mode;

[0015] When a touch input is received, performing touch control according to the recognition result of the ultrasonic function layer for the touch input.

[0016] In one embodiment, controlling the display device to be in a wake-up state according to the wake-up control input and controlling the ultrasonic function layer to enter a fingerprint recognition mode includes:

[0017] Obtaining the environmental state of the display device, where the environmental state includes one of a dry state, a humid state, and an underwater state;

[0018] Controlling the ultrasonic function layer to perform fingerprint recognition based on a fingerprint recognition mode matching the environmental state. The touch recognition mode includes one of a dry mode corresponding to the dry state, a humid mode corresponding to the humid state, and an underwater mode corresponding to the underwater state.

[0019] In one embodiment, after controlling the ultrasonic function layer to enter a touch recognition mode, the method further includes:

[0020] Upon receiving a touch input, obtain the touch duration of the touch input;

[0021] When the touch duration is greater than a detection time threshold, control the ultrasonic function layer to enter a health scan state;

[0022] Generate health data of the user of the touch input according to the scan result of the ultrasonic function layer, where the health data includes one or more of blood pressure and heart rate.

[0023] In a third aspect, an embodiment of the present invention provides a display device, which includes a display function layer and an ultrasonic function layer. The ultrasonic function layer is configured to perform fingerprint recognition and touch detection. The display device further includes:

[0024] A wake-up module, configured to receive a wake-up control input when the display device is in a sleep state;

[0025] A fingerprint recognition control module, configured to control the display device to be in a wake-up state according to the wake-up control input and control the ultrasonic function layer to enter a fingerprint recognition mode;

[0026] An unlocking control module, configured to control the display device to be unlocked according to the recognition result of the ultrasonic function layer for the fingerprint input when a fingerprint input is received.

[0027] In a fourth aspect, an embodiment of the present invention further provides an electronic device, including: a memory, a processor, and a program stored on the memory and executable on the processor; the processor is configured to read the program in the memory to implement the steps in the foregoing method.

[0028] In a fifth aspect, an embodiment of the present invention further provides a readable storage medium, configured to store a program, and the program, when executed by a processor, implements the steps in the foregoing method.

[0029] By providing an ultrasonic function layer in the embodiment of the present invention, fingerprint recognition and touch recognition can be achieved, avoiding an increase in the thickness of the display device caused by setting a separate ultrasonic function layer and a touch module. The embodiment of the present invention can reduce the thickness and weight of the display device. At the same time, the end of the display function layer includes a first wiring area, and the end of the ultrasonic function layer includes a second wiring area. The first wiring area extends from the end of the pressure-sensitive adhesive layer towards the ultrasonic function layer and is electrically connected to the second wiring area. The second wiring area is bonded to a driving circuit board provided on the side of the ultrasonic function layer away from the cover plate, which can reduce the width of the border area of the display device, thereby helping to further reduce the size of the display device and improve the convenience of use. Description of the Drawings

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0031] Figure 1 is a schematic structural diagram of a display device provided by an embodiment of the present invention;

[0032] Figure 2 is another schematic structural diagram of a display device provided by an embodiment of the present invention;

[0033] Figure 3 is a schematic structural diagram of an ultrasonic function layer provided by an embodiment of the present invention;

[0034] Figure 4 is a schematic structural diagram of a driving circuit layer provided by an embodiment of the present invention;

[0035] Figure 5 is a flowchart of a control method for a display device provided by an embodiment of the present invention;

[0036] Figure 6A is a schematic diagram of a touch scenario of a display device provided by an embodiment of the present invention;

[0037] Figure 6B is another schematic diagram of a touch scenario of a display device provided by an embodiment of the present invention;

[0038] Figure 6C is another schematic diagram of a touch scenario of a display device provided by an embodiment of the present invention;

[0039] Figure 7 is another flowchart of a control method for a display device provided by an embodiment of the present invention;

[0040] Figure 8 is a schematic structural diagram of a display device provided by an embodiment of the present invention;

[0041] Figure 9 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. Detailed implementation manners

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0043] In the embodiments of the present invention, terms such as "first" and "second" are used to distinguish similar objects and do not necessarily describe a specific order or sequence. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices. In addition, in this application, "and / or" is used to represent at least one of the connected objects. For example, A and / or B and / or C represents seven cases including A alone, B alone, C alone, A and B both present, B and C both present, A and C both present, and A, B, and C all present.

[0044] Embodiments of the present invention provide a display device.

[0045] In some of these embodiments, the display device may be a wearable device. Exemplarily, it may be a wearable device such as a smart watch or a smart bracelet.

[0046] As Figure 1 and Figure 2 shown, in one of the embodiments, the display device includes a cover plate 101, an optical layer 102, a display function layer 103, a pressure-sensitive adhesive layer 105, and an ultrasonic function layer 106 that are sequentially stacked.

[0047] In one of the embodiments, the cover plate 101 can be made of materials such as glass and resin. As Figure 1 shown, the cover plate 101 includes a light-transmitting area 1011 and a non-light-transmitting area 1012 surrounding the light-transmitting area 1011. Generally, the non-light-transmitting area 1012 is formed by coating ink on the cover plate 101 to block light.

[0048] The optical layer 102 is used to adjust light. In some of the embodiments, the optical layer 102 includes an optical adhesive layer 1021 and a polarizer 1022 that are sequentially stacked in the direction from the cover plate 101 to the display function layer 103. In one embodiment, the polarizer 1022 and the cover plate 101 are fully adhered through the optical adhesive layer 1021 to improve the adhesion effect.

[0049] The display function layer 103 can be an existing or improved display function layer 103. Exemplarily, it can be an OLED (organic light-emitting diode) display function layer 103 or an LCD (liquid crystal display function layer) panel. In an exemplary embodiment, in order to reduce the weight and thickness of the display device, a thinner and lighter OLED display function layer 103 is selected.

[0050] The display function layer 103 and the ultrasonic function layer 106 are bonded together through a pressure-sensitive adhesive layer 105. In one embodiment, the display function layer 103 and the ultrasonic function layer 106 module are fully bonded through the pressure-sensitive adhesive layer 105 to improve the bonding effect.

[0051] As Figure 1 and Figure 2 shown, the display function layer 103 includes a display area 1031 and a non-display area 1032 surrounding the display area 1031. The orthographic projection of the display area 1031 on the cover plate 101 is located within the range of the light-transmitting area 1011 of the cover plate 101 to achieve the display effect.

[0052] In some embodiments, the orthographic projection of the display area 1031 on the cover plate 101 overlaps with the light-transmitting area 1011 of the cover plate 101. Further, in some embodiments, the range of the light-transmitting area 1011 is slightly larger than the range of the display area 1031 to accommodate the bonding error between the cover plate 101 and the display function layer 103, and to avoid the non-light-transmitting area 1012 blocking the display area 1031 when the angle between the user's line of sight and the cover plate 101 is small, thereby helping to reduce the adverse impact on the display effect.

[0053] In some embodiments, in order to improve the reliability of the display function layer 103 and the ultrasonic function layer 106, a buffer layer 104 is further provided between the display function layer 103 and the ultrasonic function layer 106. Specifically, the buffer layer 104 can be provided between the display function layer 103 and the pressure-sensitive adhesive layer 105 to improve the protection effect on the display function layer 103.

[0054] The ultrasonic function layer 106 is configured to perform fingerprint recognition and touch detection. That is to say, the ultrasonic function layer 106 in this embodiment is used for both fingerprint recognition and touch detection. In this way, there is no need to separately set a touch module and a fingerprint sensor, which helps to reduce the complexity of the structure and the thickness of the display device.

[0055] In some embodiments, the ultrasonic function layer 106 is further configured to perform health detection. Exemplarily, health parameters such as the user's blood pressure and heart rate can be detected based on ultrasonic waves.

[0056] As Figure 1 and Figure 3 shown, in some of these embodiments, the ultrasonic function layer 106 includes a driving circuit layer 1061, a piezoelectric layer 1062, a conductive paste layer 1063, and a protective layer 1064 that are sequentially stacked in a direction away from the display function layer 103. The end of the driving circuit layer 1061 includes a second wiring area 10611.

[0057] As Figure 4As shown, the drive circuit layer 1061 includes a sensor 10612, which can be, for example, a thin-film transistor sensor, a pressure sensor, etc. The drive circuit layer 1061 is used to apply an electrical signal to the piezoelectric layer 1062 and receive an electrical signal.

[0058] The piezoelectric layer 1062 realizes the conversion between electrical signals and mechanical signals through the piezoelectric induction principle. Specifically, when the drive circuit layer 1061 applies an electrical signal to the piezoelectric layer 1062, the piezoelectric layer 1062 converts the electrical signal into a mechanical signal based on the piezoelectric induction principle, thereby generating ultrasonic waves. When the piezoelectric layer 1062 receives the reflected ultrasonic waves, the piezoelectric layer 1062 converts the mechanical signal into an electrical signal based on the piezoelectric induction principle. The sensor 10612 of the drive circuit layer 1061 receives the electrical signal, and the processor analyzes the received electrical signal, so as to perform fingerprint recognition and touch detection according to the analysis results.

[0059] The conductive paste layer 1063 can be made of conductive paste such as silver paste. The conductive paste layer 1063 cooperates with the drive circuit layer 1061 to apply a voltage to the piezoelectric layer 1062. The protective layer 1064 is mainly used to protect the conductive paste layer 1063 to reduce the damage of the conductive paste layer 1063 caused by factors such as oxidation.

[0060] In some embodiments, the ultrasonic function layer 106 includes an identification area, and the orthographic projection of the display area 1031 on the cover plate 101 is located within the light-transmitting area 1011, that is, the identification area of the ultrasonic function layer 106 needs to cover at least the display area 1031 to ensure the touch recognition effect.

[0061] In some embodiments, the identification area of the ultrasonic function layer 106 also covers at least part of the non-display area 1032. In an exemplary embodiment, the fingerprint recognition area or the health detection area can be set in the non-display area 1032, and the orthographic projection of the fingerprint recognition area and the health detection area on the cover plate 101 does not overlap with the orthographic projection of the display function layer 103 on the substrate. In this way, there is no display function layer 103 between the ultrasonic function layer 106 and the cover plate 101, reducing the occlusion of the emitted ultrasonic waves and the ultrasonic echoes by the display function layer 103, which helps to improve the accuracy of fingerprint recognition and health detection.

[0062] In another exemplary embodiment, the portion of the ultrasonic functional layer 106 corresponding to the fingerprint recognition area or the health detection area is bent towards the end of the display functional layer 103. Taking the display device as a smart watch as an example, the display area 1031 corresponds to the dial of the smart watch, and the fingerprint recognition area and / or the health detection area are located on the side of the dial. In this way, in the fingerprint recognition area and / or the health detection area, there is no display functional layer 103 between the housing of the smart watch and the ultrasonic functional layer 106, reducing the blocking of the emitted ultrasonic waves and the ultrasonic echoes by the display functional layer 103, which helps to improve the accuracy of fingerprint recognition and health detection.

[0063] In some of these embodiments, the thickness of the entire ultrasonic functional layer 106 can be controlled to be about 155 microns. Exemplarily, it can be 150 microns to 160 microns, which helps to reduce the thickness of the display device.

[0064] In the related art, the touch control module is usually disposed between the display functional layer and the cover plate. Such a touch control module arranged in this way will occupy a large space, which will lead to an increase in the thickness of the display device. In addition, for the touch control module, it is necessary to set traces located around the display area to transmit touch control signals, which will lead to an increase in the border width of the display device and a decrease in the screen-to-body ratio. Since the separate touch control module is cancelled in the embodiments of the present invention, it is possible to support a narrower border and also helps to increase the screen-to-body ratio.

[0065] As Figure 1 shown, the end of the display functional layer 103 includes a first wiring area 1033, which can also be understood as the fan-out area on the DO (data input) side of the display functional layer 103. The end of the ultrasonic functional layer 106 includes a second wiring area 10611. The first wiring area 1033 extends from the end of the pressure-sensitive adhesive layer 105 towards the ultrasonic functional layer 106 and is electrically connected to the second wiring area 10611.

[0066] In some of these embodiments, the display functional layer 103 is first fabricated, and then each structure included in the ultrasonic functional layer 106 is successively fabricated on the display functional layer 103. At the same time, the binding of the first wiring area 1033 and the second wiring area 10611 is completed, which helps to improve the integration of the display device and also helps to reduce the thickness of the display device.

[0067] In this embodiment, the end of the pressure-sensitive adhesive layer 105 refers to the side adjacent to the surface of the pressure-sensitive adhesive layer 105 facing the cover plate 101. The substrate of the display functional layer 103 can be selected as a flexible material, so that the first wiring area 1033 of the display functional layer 103 can be bent within a certain range. In this way, the first wiring area 1033 extends from the end of the pressure-sensitive layer to the second wiring area 10611.

[0068] In the related art, if fingerprint recognition needs to be implemented, a fingerprint recognition module needs to be provided on the side of the display function layer away from the cover plate, which causes the wiring area of the display function layer to need to be laterally bridged across the display function layer and the fingerprint recognition module to be bound to the circuit board.

[0069] In this embodiment, the first wiring area 1033 of the display function layer 103 is connected to the second wiring area 10611 of the ultrasonic function layer 106. Further, the second wiring area 10611 is bound to the driving circuit board 107 provided on the side of the ultrasonic function layer 106 away from the cover plate 101.

[0070] As Figure 2 shown, in one embodiment, the second wiring area 10611 and the driving circuit board 107 are bound through a flexible circuit board 108. The flexible circuit board 108 is provided at the end of the ultrasonic function layer 106. One end of the flexible circuit board 108 is bound to the second wiring area 10611, and the other end is bound to the driving circuit board 107.

[0071] In one embodiment, the flexible circuit board 108 can be a chip on film (COF). A display driving chip 1081 and an ultrasonic control chip 1082 can be provided on the flexible circuit board 108 as needed. The driving circuit board 107 is used to provide a display driving circuit 1071 and an ultrasonic driving circuit 1072. In this way, it can be understood that the extension lengths of the parts of the first wiring area 1033 and the second wiring area 10611 located on the side of the display function layer 103 are reduced, which helps to reduce the occupation of the lateral space, helps to reduce the border width of the display device, and helps to increase the screen-to-body ratio.

[0072] The embodiment of the present invention also provides a control method for a display device.

[0073] In one embodiment, the control method of the display device is applied to a display device. The display device includes a display function layer and an ultrasonic function layer. The ultrasonic function layer is configured to perform fingerprint recognition and touch detection. Exemplarily, the display device can be the display device in the above display device embodiment.

[0074] As Figure 5 shown, in one embodiment, the control method of the display device includes the following steps:

[0075] Step 501: Receive a wake-up control input when the display device is in a sleep state.

[0076] Taking the display device as a wearable device, such as a smart watch, a smart bracelet, etc., in this embodiment, only the smart watch is used as an example for illustration. In order to improve the battery life of the smart watch, generally, the smart watch is in a sleep state. When in use, the smart watch needs to be woken up first.

[0077] When implemented, the wake-up control input can be provided in different ways. Exemplarily, the wake-up control input can be provided by pressing a wake-up button, by raising the hand wearing the smart watch, by voice control, etc.

[0078] Step 502: Control the display device to be in a wake-up state and control the ultrasonic function layer to enter a fingerprint recognition mode according to the wake-up control input.

[0079] Since the smart watch contains a lot of sensitive information, such as the user's identity information, payment information, health information, etc., in order to improve security, in this embodiment, it is considered that the smart watch needs to be unlocked before its normal functions can be used.

[0080] When a wake-up input is received, first control the ultrasonic function layer to enter a fingerprint recognition mode to perform fingerprint recognition.

[0081] Step 503: When a fingerprint input is received, control the display device to be unlocked according to the recognition result of the ultrasonic function layer for the fingerprint input.

[0082] When implemented, first, the ultrasonic function layer emits ultrasonic waves, and then the echo is received. It should be understood that fingerprints usually include two features, valleys and ridges. When implemented, in this way, since the ultrasonic waves are reflected by the finger after being emitted. Due to the different lengths of their transmission paths, the ultrasonic wave transmission time corresponding to the positions of valleys and ridges is different. Here, the ultrasonic wave transmission time refers to the time from the emission to the reception of the ultrasonic waves. By detecting the difference between the emission time of ultrasonic waves at different positions and the echo reception time, the fingerprint features at each position can be determined as valleys or ridges, thereby generating a fingerprint image. Further, the obtained fingerprint image can be verified by combining the stored fingerprint data for fingerprint recognition.

[0083] When implemented, a time threshold can be set. Among them, the valleys of the fingerprint corresponding to the ultrasonic wave transmission time greater than this time, and the ridges of the fingerprint corresponding to the ultrasonic wave transmission time less than this time. Binarizing the ultrasonic wave transmission time corresponding to each position according to the time threshold can obtain a fingerprint image. The fingerprint signal is collected through the ultrasonic function layer to generate a fingerprint image, and the generated fingerprint image is compared with the stored fingerprint image. If the fingerprint passes the verification, the display device is unlocked.

[0084] In some embodiments, after step 503, the method further includes:

[0085] When the display device is unlocked, control the ultrasonic function layer to enter a touch recognition mode;

[0086] Upon receiving a touch input, perform touch control according to the recognition result of the touch input by the ultrasonic functional layer.

[0087] In this embodiment, after the display device is unlocked, control the ultrasonic functional layer to enter the touch recognition mode. In the touch recognition mode, by analyzing the position where the echo is generated, the touch point can be determined, and thus the touch operation or touch trajectory can be determined according to the touch point to determine the touch information.

[0088] In one embodiment, the operating power of the ultrasonic functional layer in the touch mode is less than that in the fingerprint recognition mode. It should be understood that since the fingerprint recognition mode needs to recognize the valleys and ridges of the fingerprint and has relatively high accuracy requirements, while the touch mode only needs to recognize the position where the echo is generated and thus has relatively low accuracy requirements. Therefore, in this embodiment, further controlling the operating power of the ultrasonic functional layer helps to reduce power consumption and extend the standby time of the display device.

[0089] In some embodiments, controlling the display device to be in the wake-up state and controlling the ultrasonic functional layer to enter the fingerprint recognition mode according to the wake-up control input includes:

[0090] Obtain the environmental state of the display device, where the environmental state includes one of a dry state, a humid state, and an underwater state;

[0091] Control the ultrasonic functional layer to perform fingerprint recognition based on the fingerprint recognition mode matching the environmental state, and the touch recognition mode includes one of a dry mode corresponding to the dry state, a humid mode corresponding to the humid state, and an underwater mode corresponding to the underwater state.

[0092] In this embodiment, in different environments, there are certain differences in the environment for fingerprint recognition. In this embodiment, it is considered that when performing touch recognition, the ridges of the fingerprint are in direct contact with the surface of the display device.

[0093] As Figure 6A shown, in the dry state, the valley of the fingerprint and the display device are separated by air 601.

[0094] As Figure 6B shown, in the humid state, the valley of the fingerprint and the display device may be filled with water 602. Therefore, between the valley of the fingerprint and the display device, there may be air 601, there may be water 602, or there may be part of water 602 and part of air 601.

[0095] As Figure 6C shown, in the underwater state, the valley of the fingerprint and the display device are filled with water 602.

[0096] During implementation, different recognition modes are further determined according to the above differences to improve the recognition accuracy of fingerprints.

[0097] In an exemplary embodiment, pattern recognition can be performed based on the detection results of sensors, such as pressure sensors and humidity sensors. In another embodiment, manual switching can be performed by the user. For example, the user can cycle through the above three fingerprint recognition modes by pressing a button. In another embodiment, the above three fingerprint recognition modes can also be automatically switched in an overlapping cycle. During implementation, fingerprint recognition is performed through different fingerprint recognition modes, and the recognition result with the highest confidence is selected based on factors such as the integrity of the recognized fingerprint and the matching degree with the pre-stored fingerprint in the display device.

[0098] In one embodiment, the fingerprint recognition mode is adjusted by adjusting the power and time threshold of the ultrasonic functional layer.

[0099] During implementation, taking the power and time threshold of the ultrasonic functional layer corresponding to the dry mode as a reference, since the speed of ultrasonic waves in water is greater than that in air, however, the energy loss of ultrasonic waves in water is relatively large. Therefore, under the ultrasonic model, the time threshold is lowered and the working power of the ultrasonic functional layer is increased to ensure the detection accuracy. In the underwater mode, since the valleys of the fingerprint are completely filled with water, the difference in the transmission duration of ultrasonic waves at the positions corresponding to the valleys and ridges is smaller. In this embodiment, the working power of the ultrasonic functional layer is further increased, and the time threshold can be reduced. It can be understood that in the dry mode, ultrasonic mode, and underwater mode, the working power of the ultrasonic functional layer increases in sequence, and the corresponding time threshold decreases in sequence, thereby reasonably balancing the working efficiency and fingerprint recognition accuracy.

[0100] In some embodiments, after controlling the ultrasonic functional layer to enter the touch recognition mode, the method further includes:

[0101] When a touch input is received, obtain the touch duration of the touch input;

[0102] When the touch duration is greater than the detection time threshold, control the ultrasonic functional layer to enter the health scan state;

[0103] Generate health data of the user of the touch input based on the scan result of the ultrasonic functional layer, where the health data includes one or more of blood pressure and heart rate.

[0104] In this embodiment, a detection mode is also set to detect the health data of the user. During implementation, first enter the health scan mode. During implementation, the user can first start the corresponding health detection software to perform health data detection.

[0105] After entering the health detection software, the user places a finger on the health detection area and maintains a touch state for a certain period of time. When the touch time reaches the detection time threshold, a health detection result is generated based on the scan results within the touch duration. The detection time threshold can be set as needed. Exemplarily, it can be no less than 10 seconds. Generally speaking, the longer this time is, the higher the detection accuracy is.

[0106] It can be understood that the health scan state has a higher scan frequency compared to the touch recognition mode. The ultrasonic function layer emits ultrasonic waves to scan the arterial and / or venous blood vessels in the finger, and analyzes the state of the arterial and / or venous blood vessels through the echo to obtain health parameters such as heart rate and blood pressure.

[0107] Specifically, the beating of the heart causes the artery to be in a state of continuous contraction and relaxation. When the pressing time exceeds a certain duration, the arterial reflection signals during this period are collected. The entire signal changes periodically with the heartbeat. Based on this periodic change, the heart rate and blood pressure values of the human body can be calculated. The specific calculation method can refer to related technologies and will not be further limited and described here.

[0108] As Figure 7 shown, in one embodiment, the control method of the display device can be understood as follows: when the display device is in the locked state, the display device is first awakened. At this time, it enters the fingerprint recognition mode. In the fingerprint recognition mode, fingerprint recognition and verification are performed through the ultrasonic function layer. If the unlocking is successful, it enters the touch recognition mode. If the unlocking is unsuccessful, the fingerprint information is continuously scanned and fingerprint verification is performed. When the failure reaches a certain number of times, the display device is controlled to lock. Exemplarily, it can enter the sleep state.

[0109] After the display device is unlocked, the ultrasonic function layer enters the touch recognition mode. At this time, touch recognition is performed through the ultrasonic function layer, and corresponding touch control is executed. Further, when the lock button is pressed, or when the display device is not operated for a certain period of time (such as 15 seconds or 1 minute, etc.), it enters the sleep state.

[0110] Further, if the health application program is entered based on touch control, the ultrasonic function layer is controlled to enter the health detection mode to detect health data. After the detection is completed, the display device is controlled to enter the sleep state.

[0111] The embodiment of the present invention also provides a display device.

[0112] As Figure 8 shown, in one embodiment, the display device 800 includes a display function layer and an ultrasonic function layer. The ultrasonic function layer is configured to perform fingerprint recognition and touch detection. The display device 800 further includes:

[0113] The wake-up module 801 is configured to receive a wake-up control input when the display device is in a sleep state;

[0114] The fingerprint recognition control module 802 is configured to control the display device to be in a wake-up state and control the ultrasonic function layer to enter a fingerprint recognition mode according to the wake-up control input;

[0115] The unlocking control module 803 is configured to control the unlocking of the display device according to the recognition result of the ultrasonic function layer for the fingerprint input when a fingerprint input is received.

[0116] In some embodiments, it further includes:

[0117] The touch recognition control module is configured to control the ultrasonic function layer to enter a touch recognition mode when the display device is unlocked;

[0118] The touch control module is configured to perform touch control according to the recognition result of the ultrasonic function layer for the touch input when a touch input is received.

[0119] In some embodiments, the fingerprint recognition control module 802 includes:

[0120] The environmental state acquisition sub-module is configured to acquire the environmental state of the display device, where the environmental state includes one of a dry state, a humid state, and an underwater state;

[0121] The fingerprint recognition control sub-module is configured to control the ultrasonic function layer to perform fingerprint recognition based on a fingerprint recognition mode matching the environmental state, and the touch recognition mode includes one of a dry mode corresponding to the dry state, a humid mode corresponding to the humid state, and an underwater mode corresponding to the underwater state.

[0122] In some embodiments, it further includes:

[0123] The touch duration determination module is configured to acquire the touch duration of the touch input when a touch input is received;

[0124] The health scan control module is configured to control the ultrasonic function layer to enter a health scan state when the touch duration is greater than a detection time threshold;

[0125] The health data generation module is configured to generate health data of the user of the touch input according to the scan result of the ultrasonic function layer, where the health data includes one or more of blood pressure and heart rate.

[0126] The display device 800 in this embodiment can implement each step of the control method embodiment of the above display device and can achieve substantially the same technical effects, which will not be elaborated here.

[0127] An embodiment of the present invention further provides an electronic device. Please refer to Figure 9 , the electronic device may include a processor 901, a memory 902, and a program 9021 stored on the memory 902 and executable on the processor 901.

[0128] When the program 9021 is executed by the processor 901, it can implement any step in the above method embodiment and achieve the same beneficial effects, which will not be elaborated here.

[0129] Those of ordinary skill in the art can understand that all or part of the steps of implementing the above embodiment method can be completed by hardware related to program instructions, and the program can be stored in a readable medium.

[0130] An embodiment of the present invention further provides a readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it can implement any step in the above method embodiment and can achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0131] The storage medium is, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc.

[0132] It should be noted that it should be understood that the above division of each module is only a logical function division. In actual implementation, it can be fully or partially integrated into a physical entity, or physically separated. And these modules can all be implemented in the form of software called by a processing element; they can also all be implemented in hardware form; or some modules can be implemented in the form of software called by a processing element, and some modules can be implemented in hardware form. For example, the determination module can be a separately established processing element, or can be integrated in a certain chip of the above device. In addition, it can also be stored in the memory of the above device in the form of program code, and called and executed by a certain processing element of the above device to implement the function of the above determination module. The implementation of other modules is similar. In addition, these modules can be fully or partially integrated together, or can be independently implemented. The processing element here can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above modules can be completed by the integrated logic circuit in the processor element or the instruction in software form.

[0133] For example, each module, unit, subunit, or sub-module may be one or more integrated circuits configured to implement the above methods. For example: one or more Application Specific Integrated Circuits (ASICs), or one or more digital signal processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), etc. Again, when a certain module above is implemented in the form of a processing element scheduling program code, the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processors that can call program code. Again, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0134] The above is the preferred implementation mode of the embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle described in the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A display device, characterized in that, It includes a cover plate, an optical layer, a display function layer, a pressure-sensitive adhesive layer, and an ultrasonic function layer that are stacked in sequence. The ultrasonic function layer is configured to perform fingerprint recognition and touch detection. An end of the display function layer includes a first wiring area, and an end of the ultrasonic function layer includes a second wiring area. The first wiring area extends from the end of the pressure-sensitive adhesive layer towards the ultrasonic function layer and is electrically connected to the second wiring area. The second wiring area is bonded to a driving circuit layer provided on a side of the ultrasonic function layer away from the cover plate. Among them, the driving circuit layer is used to set an ultrasonic driving circuit and a display driving circuit; The ultrasonic function layer includes a driving circuit layer, a piezoelectric layer, a conductive paste layer, and a protective layer that are stacked in sequence along a direction away from the display function layer. An end of the driving circuit layer includes the second wiring area; Each structure of the ultrasonic function layer is sequentially formed on the display function layer.

2. The display device according to claim 1, characterized in that, The second wiring area and the driving circuit layer are bonded through a flexible circuit board. The flexible circuit board is provided at an end of the ultrasonic function layer. One end of the flexible circuit board is bonded to the second wiring area, and the other end is bonded to the driving circuit layer.

3. A control method for a display device, characterized in that, Applied to the display device according to claim 1 or 2, the display device includes a display function layer and an ultrasonic function layer. The ultrasonic function layer is configured to perform fingerprint recognition and touch detection. The method includes the following steps: Receiving a wake-up control input when the display device is in a sleep state; Controlling the display device to be in a wake-up state according to the wake-up control input and controlling the ultrasonic function layer to enter a fingerprint recognition mode; When a fingerprint input is received, controlling the display device to unlock according to the recognition result of the ultrasonic function layer for the fingerprint input.

4. The method according to claim 3, wherein After controlling the display device to unlock according to the fingerprint recognition result of the ultrasonic function layer, the method further includes: When the display device is unlocked, controlling the ultrasonic function layer to enter a touch recognition mode; When a touch input is received, performing touch control according to the recognition result of the ultrasonic function layer for the touch input.

5. The method according to claim 4, characterized in that, Controlling the display device to be in a wake-up state according to the wake-up control input and controlling the ultrasonic function layer to enter a fingerprint recognition mode includes: Obtaining an environmental state of the display device, where the environmental state includes one of a dry state, a humid state, and an underwater state; Controlling the ultrasonic function layer to perform fingerprint recognition based on a fingerprint recognition mode matching the environmental state. The touch recognition mode includes one of a dry mode corresponding to the dry state, a humid mode corresponding to the humid state, and an underwater mode corresponding to the underwater state.

6. The method according to claim 5, wherein After controlling the ultrasonic function layer to enter a touch recognition mode, the method further includes: When a touch input is received, obtaining a touch duration of the touch input; When the touch duration is greater than a detection time threshold, controlling the ultrasonic function layer to enter a health scan state; Generate health data of the user of the touch input according to the scanning result of the ultrasonic functional layer, where the health data includes one or more of blood pressure and heart rate.

7. A display device, comprising a display functional layer and an ultrasonic functional layer, the ultrasonic functional layer being configured to perform fingerprint recognition and touch detection for implementing the control method of the display device according to any one of claims 3-6, the display device further comprising: A wake-up module for receiving a wake-up control input when the display device is in a sleep state; A fingerprint recognition control module for controlling the display device to be in a wake-up state and controlling the ultrasonic functional layer to enter a fingerprint recognition mode according to the wake-up control input; An unlocking control module for controlling the display device to be unlocked according to the recognition result of the ultrasonic functional layer for the fingerprint input when a fingerprint input is received.

8. A display device, comprising: An ultrasonic functional layer, a memory, a processor, and a program stored on the memory and executable on the processor; characterized in that the processor is configured to read the program in the memory to implement the steps in the control method of the display device according to any one of claims 3 to 6.

9. A readable storage medium for storing a program, characterized in that, When the program is executed by the processor, it implements the steps in the control method of the display device according to any one of claims 3 to 6.

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