Detection device and intelligent terminal

Abstract

The utility model provides a detection device and an intelligent terminal. The detection device comprises a processor and a piezoelectric film, the processor is connected with two sides of the piezoelectric film; the processor obtains the voltage signal of the piezoelectric film and detects the folding angle of the foldable screen according to the voltage signal, so that the folding angle of the foldable screen is detected based on the characteristic that different voltages are caused by different pressures on the piezoelectric film, and the detection accuracy and feasibility are improved.

Description

Technical Field

[0001] This application relates to the field of smart terminal technology, specifically to a detection device and a smart terminal. Background Technology

[0002] Currently, there are two main methods for angle detection in foldable phones: one is through a 3D magnetic encoder, and the other is through dual gyroscopes.

[0003] In the process of conceiving and implementing this application, the inventors discovered at least the following problems: For the 3D magnetic encoder solution, due to the various complex electromagnetic environments on mobile devices and the application of metal materials, this detection method is easily interfered with, resulting in inaccurate angle detection; For the dual gyroscope solution, due to the use of two gyroscope chips, the material cost is high and the area of ​​the device is increased, and a strong software algorithm is required to achieve angle detection.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Utility Model Content

[0005] To address the aforementioned technical problems, this application provides a detection device and a smart terminal for angle detection.

[0006] This application provides a detection device, including: a processor and a piezoelectric thin film;

[0007] The processor is connected to both sides of the piezoelectric film;

[0008] The processor detects the current voltage signal of the piezoelectric film and determines the folding angle of the foldable screen based on the voltage signal of the piezoelectric film.

[0009] Optionally, it may also include: a memory;

[0010] The memory stores the correspondence between the voltage signal of the piezoelectric film and the folding angle of the foldable screen.

[0011] Optionally, it further includes: a signal amplification circuit, the signal amplification circuit being connected to both sides of the processor and the piezoelectric film;

[0012] The signal amplification circuit amplifies the current voltage signal of the piezoelectric film;

[0013] The processor determines the current folding angle of the foldable screen based on the amplified current voltage signal.

[0014] Optionally, the processor integrates an analog-to-digital converter port, which is connected to the signal amplification circuit;

[0015] The analog-to-digital conversion port detects the strength of the current voltage signal amplified by the signal amplification circuit; the processor determines the current folding angle of the foldable screen based on the signal strength detected by the analog-to-digital conversion port.

[0016] Optionally, the signal amplification circuit includes: an operational amplifier, a first resistor, and a second resistor;

[0017] The non-inverting input terminal of the operational amplifier is connected to both sides of the piezoelectric film, and the inverting input terminal of the operational amplifier is connected to the first terminal of the first resistor and the first terminal of the second resistor.

[0018] The second end of the first resistor is grounded, and the second end of the second resistor is connected to the output terminal of the operational amplifier.

[0019] Optionally, the foldable screen is folded at the hinge;

[0020] The piezoelectric film is located between the pivot and the foldable screen, and the area of ​​the piezoelectric film is smaller than the area of ​​the foldable screen.

[0021] Optionally, the piezoelectric film comprises a piezoelectric film made of a carbon-neutral polymer.

[0022] This application also includes a smart terminal, comprising: the aforementioned detection device.

[0023] Optionally, it also includes:

[0024] Memory and / or signal amplification circuitry;

[0025] The memory is connected to the processor, and the memory stores the correspondence between the voltage signal of the piezoelectric film and the folding angle of the foldable screen;

[0026] The signal amplification circuit is connected to both sides of the piezoelectric film and the processor, and amplifies the current voltage signal of the piezoelectric film.

[0027] Optionally, the smart terminal stores preset applications;

[0028] The processor determines whether to trigger the launch of the preset application based on the current folding angle of the foldable screen.

[0029] As described above, the detection device of this application can be applied to a smart terminal, including: a processor and a piezoelectric film attached to the underside of a foldable screen; the processor is connected to both sides of the piezoelectric film; the processor acquires the voltage signal of the piezoelectric film and detects the folding angle of the foldable screen based on the voltage signal, thereby realizing the detection of the folding angle of the foldable screen based on the characteristic that the voltage is different due to different pressures on the piezoelectric film, thus improving the detection accuracy and feasibility. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0031] Figure 1 A schematic diagram of the hardware structure of a smart terminal to implement the various embodiments of this application;

[0032] Figure 2 A communication network system architecture diagram provided for an embodiment of this application;

[0033] Figure 3 This is a schematic diagram of the detection device according to the first embodiment;

[0034] Figure 4 This is a schematic diagram of the detection device according to the first embodiment;

[0035] Figure 5 This is a schematic diagram of the signal amplification circuit shown according to the first embodiment;

[0036] Figure 6 This is a schematic diagram of the structure of a smart terminal according to the second embodiment.

[0037] The realization of the objectives, functional features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0038] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0039] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, components, features, and elements with the same names in different embodiments of this application may have the same meaning or different meanings, the specific meaning of which must be determined by its interpretation in that specific embodiment or further in conjunction with the context of that specific embodiment.

[0040] It should be understood that although the terms first, second, third, etc., may be used herein to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this document, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if," as used herein, may be interpreted as "when," "when," or "in response to determination." Furthermore, as used herein, the singular forms "a," "an," and "the" are intended to also include the plural forms unless the context indicates otherwise. It should be further understood that the terms "comprising," "including," indicate the presence of the stated feature, step, operation, element, component, item, kind, and / or group, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or," "and / or," "including at least one of the following," etc., as used in this application, may be interpreted as inclusive, or mean any one or any combination thereof. For example, "including at least one of the following: A, B, C" means "any one of the following: A; B; C; A and B; A and C; B and C; A and B and C." Similarly, "A, B, or C" or "A, B, and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A and B and C." Exceptions to this definition only occur when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0041] It should be understood that although the steps in the flowcharts of this application's embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some of the steps in the figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least a portion of the sub-steps or stages of other steps.

[0042] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0043] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0044] In the following description, the use of suffixes such as "module," "part," or "unit" to denote elements is solely for the purpose of illustrative purposes and has no specific meaning in itself. Therefore, "module," "part," or "unit" may be used interchangeably.

[0045] Smart terminals can be implemented in various forms. For example, the smart terminals described in this application may include smart terminals such as mobile phones, tablets, laptops, handheld computers, personal digital assistants (PDAs), portable media players (PMPs), navigation devices, wearable devices, smart bracelets, pedometers, etc., as well as fixed terminals such as digital TVs and desktop computers.

[0046] The following description will use a mobile terminal as an example. Those skilled in the art will understand that, apart from elements specifically designed for mobile purposes, the construction according to the embodiments of this application can also be applied to fixed-type terminals.

[0047] Please see Figure 1This is a schematic diagram of the hardware structure of a mobile terminal implementing various embodiments of this application. The mobile terminal 100 may include: an RF (Radio Frequency) unit 101, a WiFi module 102, an audio output unit 103, an A / V (Audio / Video) input unit 104, a sensor 105, a display unit 106, a user input unit 107, an interface unit 108, a memory 109, a processor 110, and a power supply 111, etc. Those skilled in the art will understand that... Figure 1 The mobile terminal structure shown does not constitute a limitation on the mobile terminal. The mobile terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0048] The following is combined with Figure 1 A detailed introduction to each component of the mobile terminal:

[0049] The radio frequency unit 101 can be used for receiving and transmitting signals during information transmission or calls. Specifically, it receives downlink information from the base station and processes it with the processor 110; additionally, it transmits uplink data to the base station. Typically, the radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, and a duplexer. Furthermore, the radio frequency unit 101 can also communicate wirelessly with networks and other devices. The aforementioned wireless communications may use any communication standard or protocol, including but not limited to GSM (Global System for Mobile Communication), GPRS (General Packet Radio Service), CDMA2000 (Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division Duplex-Long Term Evolution), and TDD-LTE (Time Division Duplex-Long Term Evolution). (ion, time-division duplex long-term evolution) and 5G, etc.

[0050] WiFi is a short-range wireless transmission technology. Mobile terminals, through the WiFi module 102, can help users send and receive emails, browse web pages, and access streaming media, providing users with wireless broadband internet access. Although Figure 1 WiFi module 102 is shown, but it is understood that it is not a necessary component of a mobile terminal and can be omitted as needed without changing the nature of the invention.

[0051] The audio output unit 103 can convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into audio signals and output them as sound when the mobile terminal 100 is in call signal receiving mode, call mode, recording mode, voice recognition mode, broadcast receiving mode, etc. Furthermore, the audio output unit 103 can also provide audio output related to specific functions performed by the mobile terminal 100 (e.g., call signal receiving sound, message receiving sound, etc.). The audio output unit 103 may include a speaker, a buzzer, etc.

[0052] The A / V input unit 104 is used to receive audio or video signals. The A / V input unit 104 may include a graphics processing unit (GPU) 1041 and a microphone 1042. The GPU 1041 processes image data of still images or videos acquired by an image capture device (such as a camera) in video capture mode or image capture mode. The processed image frames can be displayed on the display unit 106. The image frames processed by the GPU 1041 can be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 can receive sound (audio data) in operating modes such as telephone call mode, recording mode, and voice recognition mode, and can process such sound into audio data. The processed audio (voice) data can be converted into a format that can be transmitted to a mobile communication base station via the radio frequency unit 101 in telephone call mode. The microphone 1042 can implement various types of noise cancellation (or suppression) algorithms to eliminate (or suppress) noise or interference generated during the reception and transmission of audio signals.

[0053] The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Optionally, the light sensor includes an ambient light sensor and a proximity sensor. Optionally, the ambient light sensor can adjust the brightness of the display panel 1061 according to the ambient light level, and the proximity sensor can turn off the display panel 1061 and / or backlight when the mobile terminal 100 is moved to the ear. As a type of motion sensor, an accelerometer sensor can detect the magnitude of acceleration in various directions (generally three axes), and can detect the magnitude and direction of gravity when stationary. It can be used for applications that recognize the phone's posture (such as landscape / portrait switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc. Other sensors that may be configured in the phone, such as fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, and infrared sensors, will not be described in detail here.

[0054] The display unit 106 is used to display information input by the user or information provided to the user. The display unit 106 may include a display panel 1061, which may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.

[0055] User input unit 107 can be used to receive input numerical or character information, and generate key signal inputs related to user settings and function control of the mobile terminal. Optionally, user input unit 107 may include touch panel 1071 and other input devices 1072. Touch panel 1071, also known as a touch screen, can collect touch operations performed by the user on or near it (such as operations performed by the user using a finger, stylus, or any suitable object or accessory on or near touch panel 1071), and drive corresponding connection devices according to a pre-set program. Touch panel 1071 may include a touch detection device and a touch controller. Optionally, the touch detection device detects the user's touch position and the signal generated by the touch operation, and transmits the signal to the touch controller; the touch controller receives touch information from the touch detection device, converts it into touch point coordinates, sends it to processor 110, and can receive and execute commands sent by processor 110. In addition, touch panel 1071 can be implemented using various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may also include other input devices 1072. Optionally, other input devices 1072 may include, but are not limited to, one or more of the following: physical keyboard, function keys (such as volume control buttons, power buttons, etc.), trackball, mouse, joystick, etc., without being specifically limited here.

[0056] Optionally, the touch panel 1071 may cover the display panel 1061. When the touch panel 1071 detects a touch operation on or near it, it transmits the information to the processor 110 to determine the type of touch event. Subsequently, the processor 110 provides corresponding visual output on the display panel 1061 based on the type of touch event. Although in Figure 1 In this embodiment, the touch panel 1071 and the display panel 1061 are two independent components to realize the input and output functions of the mobile terminal. However, in some embodiments, the touch panel 1071 and the display panel 1061 can be integrated to realize the input and output functions of the mobile terminal. The specific implementation is not limited here.

[0057] Interface unit 108 serves as an interface through which at least one external device can connect to mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, an audio input / output (I / O) port, a video I / O port, a headphone port, and so on. Interface unit 108 may be used to receive input (e.g., data, power, etc.) from the external device and transmit the received input to one or more elements within mobile terminal 100, or it may be used to transmit data between mobile terminal 100 and the external device.

[0058] The memory 109 can be used to store software programs and various data. The memory 109 may primarily include a program storage area and a data storage area. Optionally, the program storage area may store the operating system, applications required for at least one function (such as sound playback, image playback, etc.), etc.; the data storage area may store data created based on the use of the mobile phone (such as audio data, phonebook, etc.). Furthermore, the memory 109 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0059] The processor 110 is the control center of the mobile terminal. It connects various parts of the mobile terminal via various interfaces and lines. By running or executing software programs and / or modules stored in the memory 109, and by calling data stored in the memory 109, it performs various functions and processes data of the mobile terminal, thereby providing overall monitoring of the mobile terminal. The processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor and a modem processor. Optionally, the application processor mainly handles the operating system, user interface, and applications, while the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the processor 110.

[0060] The mobile terminal 100 may also include a power supply 111 (such as a battery) that supplies power to various components. Preferably, the power supply 111 can be logically connected to the processor 110 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system.

[0061] although Figure 1 As not shown, the mobile terminal 100 may also include a Bluetooth module, etc., which will not be described in detail here.

[0062] To facilitate understanding of the embodiments of this application, the communication network system on which the mobile terminal of this application is based is described below.

[0063] Please see Figure 2 , Figure 2 This application provides a communication network system architecture diagram. The communication network system is an LTE system based on the general mobile communication technology. The LTE system includes a UE (User Equipment) 201, an E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) 202, an EPC (Evolved Packet Core) 203, and the operator's IP services 204, which are connected in sequence.

[0064] Optionally, UE201 can be the aforementioned terminal 100, which will not be described in detail here.

[0065] E-UTRAN202 includes eNodeB2021 and other eNodeB2022, etc. Optionally, eNodeB2021 can connect to other eNodeB2022 via backhaul (e.g., X2 interface), and eNodeB2021 connects to EPC203, providing access from UE201 to EPC203.

[0066] EPC203 may include MME (Mobility Management Entity) 2031, HSS (Home Subscriber Server) 2032, other MMEs 2033, SGW (Serving Gateway) 2034, PGW (Packet Data Network Gateway) 2035, and PCRF (Policy and Charging Rules Function) 2036, etc. Optionally, MME2031 is the control node that handles signaling between UE201 and EPC203, providing bearer and connection management. HSS2032 is used to provide registers to manage functions such as the Home Location Register (not shown in the figure) and stores user-specific information such as service characteristics and data rates. All user data can be sent through SGW2034. PGW2035 can provide UE201 with IP address allocation and other functions. PCRF2036 is the policy and charging control decision point for service data flow and IP bearer resources. It selects and provides available policy and charging control decisions for the policy and charging enforcement function unit (not shown in the figure).

[0067] IP services 204 may include the Internet, intranet, IMS (IP Multimedia Subsystem), or other IP services.

[0068] Although the above description uses the LTE system as an example, those skilled in the art should know that this application is not only applicable to the LTE system, but also to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA, 5G and future new network systems (such as 6G), etc., without limitation.

[0069] Based on the above-described mobile terminal hardware structure and communication network system, various embodiments of this application are proposed.

[0070] First Embodiment

[0071] Reference Figure 3 , Figure 3 This is a schematic diagram of the detection device according to the first embodiment. The detection device of this application embodiment can be applied to a smart terminal (such as a mobile phone), including:

[0072] Processor 101, piezoelectric film 103; processor 101 is connected to both sides of piezoelectric film 103;

[0073] The processor 101 acquires the voltage signal of the piezoelectric film 103 and detects the folding angle of the foldable screen 102 based on the voltage signal.

[0074] Piezoelectric films are a special type of thin film material. When pressure or torque is applied to a piezoelectric film, the piezoelectric material layer deforms, causing charge separation and potential changes. Specifically, when a piezoelectric film is subjected to pressure, the piezoelectric material layer will compress or stretch, resulting in an uneven distribution of positive and negative charges inside. This charge imbalance leads to the generation of a potential difference, thereby forming an electric field.

[0075] When the external force disappears, the piezoelectric film will return to its original shape, and the charge distribution and potential will also return to their initial state.

[0076] For example, when the piezoelectric film 103 is attached to the bottom of the foldable screen 102, if the foldable screen 102 folds, the pressure on the piezoelectric film 103 changes. Different folding angles of the foldable screen 102 result in different pressures on the piezoelectric film 103. This change in pressure on the piezoelectric film 103 causes a change in its voltage, which in turn causes a change in the voltage of the piezoelectric film 103 when the folding angle of the foldable screen 102 changes. Furthermore, the voltage of the piezoelectric film 103 refers to the voltage difference across its two sides. Therefore, the processor 101 connected to both sides of the piezoelectric film 103 can determine the folding angle of the foldable screen 102 based on the voltage of the piezoelectric film 103. The folding angle can be greater than or equal to 0 degrees and less than or equal to 180 degrees.

[0077] Optional, such as Figure 4 As shown, the detection device also includes a signal amplification circuit 104. The input terminals of the signal amplification circuit 104 are connected to both sides of the piezoelectric film 103, and the output terminals of the signal amplification circuit 104 are connected to the processor 101. Since the voltage signal generated by the piezoelectric film 103 when it is deformed is relatively weak, the voltage signal of the piezoelectric film 103 is amplified by the signal amplification circuit 104 before being output to the processor 101 for processing, thereby improving the detection accuracy of the processor 101.

[0078] Optional, such as Figure 5 As shown, the signal amplification circuit 104 includes an operational amplifier, a first resistor R1, and a second resistor R2. The non-inverting input of the operational amplifier is connected to both sides of the piezoelectric film 103, and the inverting input is connected to the first terminal of the first resistor R1 and the first terminal of the second resistor R2. The second terminal of the first resistor R1 is grounded, and the second terminal of the second resistor R2 is connected to the output terminal of the operational amplifier. Amplification is achieved based on a simple operational amplification structure, reducing the area occupied by the components.

[0079] Optionally, the piezoelectric film 103 may include at least one of the following:

[0080] Piezoelectric ceramic thin films: These are typically made of ceramic materials, such as iron lead zirconate titanate (PZT) and iron lead magnesium titanate (PMN). These ceramic materials exhibit a high piezoelectric effect and can deform or generate charges under the influence of an electric field or mechanical stress.

[0081] Piezoelectric polymer films: These are typically made of polymer materials, such as polyvinylidene fluoride (PVDF) and its derivatives.

[0082] Inorganic non-ceramic thin films: made of non-ceramic materials, such as zinc oxide (ZnO), etc. Inorganic non-ceramic thin films possess piezoelectric properties;

[0083] Composite films: composed of different materials, such as combining piezoelectric materials with conductive materials to achieve more flexible applications;

[0084] Double-layer thin film: It is composed of two layers of materials, one of which is a piezoelectric material and the other is an electromechanical material. Under the action of an external electric field or mechanical stress, the piezoelectric layer deforms, thereby causing a change in charge between the electrodes, thus realizing sensing.

[0085] The detection device provided in this embodiment includes a processor 101 and a piezoelectric film 103 attached to the underside of the foldable screen 102. The processor 101 is connected to both sides of the piezoelectric film 103. The processor 101 acquires the voltage signal of the piezoelectric film 103 and detects the folding angle of the foldable screen 102 based on the voltage signal. Thus, the folding angle of the foldable screen 102 is detected based on the characteristics of the piezoelectric film 103, thereby improving the detection accuracy and feasibility.

[0086] Second Embodiment

[0087] Reference Figure 6 As shown, Figure 6 This is a schematic diagram of the structure of a smart terminal according to the second embodiment. The smart terminal of this application embodiment includes:

[0088] The processor 101, the foldable screen 102, and the piezoelectric film 103 attached to the underside of the foldable screen 102; the processor 101 is connected to both sides of the piezoelectric film 103;

[0089] The processor 101 acquires the voltage signal of the piezoelectric film 103 and detects the opening and closing degree of the smart terminal based on the voltage signal.

[0090] For example, the piezoelectric film 103 outputs a corresponding voltage signal based on the pressure transmitted when the smart terminal is opened and closed, and the processor 101 detects the degree of opening and closing of the smart terminal based on the voltage signal.

[0091] Optionally, the smart terminal includes a hinge, and the foldable screen 102 folds around the hinge as a central axis. A piezoelectric film 103 is located below the screen at the hinge. By attaching the piezoelectric film 103 to the area below the screen at the hinge of the smart terminal, the area of ​​the piezoelectric film 103 is reduced. Since the smart terminal opens and closes around the hinge, the pressure on the piezoelectric film 103 varies depending on the opening and closing angle, resulting in different voltages generated by the piezoelectric film 103. This allows the opening and closing degree of the smart terminal to be detected based on the voltage signal, achieving the purpose of angle detection for the smart terminal.

[0092] The opening angle of the smart terminal matches the folding angle of the foldable screen. The top of the screen can be understood as the side that the user can observe, and the bottom of the screen can be understood as the side closer to the back of the smart terminal.

[0093] Optionally, a correspondence between the opening degree of the smart terminal and the voltage signal of the piezoelectric film can be established in advance, and then the opening degree of the smart terminal can be detected based on the voltage signal of the piezoelectric film according to the correspondence.

[0094] Optionally, the smart terminal includes a memory 105, which stores the correspondence between the opening degree of the smart terminal and the voltage of the piezoelectric film. When the processor 101 obtains the voltage signal of the piezoelectric film, it can obtain the opening degree of the smart terminal from the correspondence stored in the memory 105.

[0095] Optionally, the smart terminal includes a motherboard with a signal amplification circuit 104. The input of the signal amplification circuit 104 is connected to both sides of the piezoelectric film 103, and the output of the signal amplification circuit 104 is connected to the processor 101. The voltage signal of the piezoelectric film 103 is amplified by the signal amplification circuit 104 and then output to the processor 101 for processing, thereby improving the detection accuracy of the processor 101.

[0096] Optionally, the processor 101 integrates an analog-to-digital converter (ADC) port, which is connected to the output of the signal amplification circuit 104. This allows the strength of the amplified input analog electrical signal to be detected through the ADC port integrated on the processor 101, and the opening and closing angle of the smart terminal to be determined based on the magnitude of the received electrical signal.

[0097] Optionally, the smart terminal stores preset applications, and the processor can handle the launch of the preset applications according to the opening degree of the smart terminal. For example, when the opening degree of the smart terminal is greater than 90°, the launch of video applications can be triggered, reducing user operations and improving the user experience.

[0098] The smart terminal provided in this embodiment includes a processor, a foldable screen, and a piezoelectric film attached to the underside of the foldable screen. The processor is connected to both sides of the piezoelectric film. The processor acquires the voltage signal of the piezoelectric film and detects the opening degree of the smart terminal based on the voltage signal. Thus, the opening degree of the smart terminal is detected based on the characteristics of the piezoelectric film, improving the detection accuracy and feasibility.

[0099] It is understood that the above scenarios are merely examples and do not constitute a limitation on the application scenarios of the technical solutions provided in the embodiments of this application. The technical solutions of this application can also be applied to other scenarios. For example, as those skilled in the art will know, with the evolution of system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0100] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0101] The steps in the method of this application embodiment can be adjusted, combined, or deleted according to actual needs.

[0102] The units in the device of this application embodiment can be merged, divided, and deleted according to actual needs.

[0103] In this application, the same or similar terms, concepts, technical solutions and / or application scenario descriptions are generally described in detail only when they appear for the first time. When they appear again, they are generally not repeated for the sake of brevity. When understanding the technical solutions and other contents of this application, the same or similar terms, concepts, technical solutions and / or application scenario descriptions that are not described in detail later can be referred to their previous relevant detailed descriptions.

[0104] In this application, the descriptions of the various embodiments have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0105] The technical features of the present application can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of the present application.

[0106] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, controlled terminal, or network device, etc.) to execute the methods of each embodiment of this application.

[0107] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a storage medium or transmitted from one storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, storage disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state storage disk (SSD)).

[0108] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A detection device, characterized in that: include: Processor, piezo film; The processor is connected to two sides of the piezoelectric film; The processor detects a current voltage signal of the piezoelectric film and determines a folding angle of the foldable screen according to the voltage signal of the piezoelectric film.

2. The detection device according to claim 1, characterized in that: Also includes: Memory; The memory stores the corresponding relationship between the voltage signal of the piezoelectric film and the folding angle of the foldable screen.

3. The detection device according to claim 1, characterized in that: Also includes: A signal amplifying circuit, wherein the signal amplifying circuit is connected to the processor and two sides of the piezoelectric film; The signal amplifying circuit amplifies the current voltage signal of the piezoelectric film; The processor determines a current folding angle of the foldable screen according to the amplified current voltage signal.

4. The detection device according to claim 3, characterized in that: The processor is integrated with an analog-to-digital conversion port, and the analog-to-digital conversion port is connected to the signal amplification circuit; The analog-to-digital conversion port detects the strength of the current voltage signal amplified by the signal amplification circuit; the processor determines the current folding angle of the foldable screen according to the signal strength detected by the analog-to-digital conversion port.

5. The detection device according to claim 3, characterized in that: The signal amplifying circuit comprises: an operational amplifier, a first resistor and a second resistor; The non-inverting input terminal of the operational amplifier is connected to two sides of the piezoelectric film, and the inverting input terminal of the operational amplifier is connected to the first end of the first resistor and the first end of the second resistor; A second end of the first resistor is grounded, and a second end of the second resistor is connected to an output end of the operational amplifier.

6. The detection device according to any one of claims 1 to 5, characterized in that: The foldable screen is folded at the hinge; The piezoelectric film is located between the rotating shaft and the foldable screen, and the area of ​​the piezoelectric film is smaller than the area of ​​the foldable screen.

7. The detection device according to any one of claims 1 to 5, characterized in that: The piezoelectric film comprises a piezoelectric film made of a carbon neutral polymer.

8. An intelligent terminal, characterized in that: include: The detection device according to any one of claims 1 to 7.

9. The intelligent terminal according to claim 8, characterized in that: Also includes: Memory and / or signal amplification circuit; The memory is connected to the processor, and the memory stores the corresponding relationship between the voltage signal of the piezoelectric film and the folding angle of the foldable screen; The signal amplifying circuit is connected to two sides of the piezoelectric film and the processor, and the signal amplifying circuit amplifies the current voltage signal of the piezoelectric film.

10. The intelligent terminal according to claim 8, characterized in that: The smart terminal stores a preset application; The processor determines whether to trigger the startup of the preset application according to the current folding angle of the foldable screen.

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