Electronic equipment and screen unfolding method

Abstract

The embodiment of the invention relates to the technical field of electronic equipment, in particular to electronic equipment and a screen unfolding method, and is used for solving the problem that the display size of a screen is small after existing folding screen electronic equipment is unfolded. The electronic equipment comprises a screen, an equipment main body and a telescopic mechanism. The screen comprises a first screen, a second screen and a third screen, and the second screen is located between the first screen and the third screen in the extending direction of the screen. The equipment body comprises a rotating mechanism, a first body part and a second body part. The rotating mechanism is connected with the first body part and the second body part, and the first body part rotates relative to the second body part through the rotating mechanism. The telescopic mechanism is connected with the second main body part and the third screen. The telescopic mechanism comprises a first state and a second state, and when the telescopic mechanism is in the first state, the third screen extends and is in the same plane with the second screen; when the telescopic mechanism is in the second state, the third screen is rolled and located on the side, close to the second main body part, of the second screen.

Description

Methods for unfolding electronic devices and screens Technical Field

[0001] This application relates to the field of electronic device technology, and more particularly to electronic devices and screen unfolding methods. Background Technology

[0002] Currently, consumers are demanding increasingly larger screen sizes for electronic devices. For example, consumers increasingly want to see larger screens, which has led to the development of foldable phones. Foldable phones are small and portable when folded, and have a large display size when unfolded.

[0003] However, even when foldable phones are unfolded, the overall display area is relatively small, making it difficult to meet consumers' demands for larger screen sizes. Therefore, there is an urgent need for electronic devices with larger screen sizes. Summary of the Invention

[0004] Embodiments of this application provide an electronic device and a screen unfolding method to solve the problem that the screen display size is small when the current foldable screen electronic device is unfolded.

[0005] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0006] In a first aspect, an electronic device is provided. The electronic device includes a screen, a device body, and a telescopic mechanism. The screen includes a first screen, a second screen, and a third screen. The second screen is located between the first screen and the third screen in the screen's extending direction. The device body includes a rotating mechanism, a first main body portion, and a second main body portion. The rotating mechanism is connected to the first main body portion and the second main body portion, and the first main body portion rotates relative to the second main body portion using the rotating mechanism. The first main body portion supports the first screen, and the second main body portion supports the second screen. The telescopic mechanism is connected to the second main body portion and the third screen. The telescopic mechanism includes a first state and a second state. When the telescopic mechanism is in the first state, the third screen is extended and coplanar with the second screen; when the telescopic mechanism is in the second state, the third screen is retracted and located on the side of the second screen closer to the second main body portion.

[0007] For example, the screen is a single structure, and the first screen, the second screen, and the third screen are all different parts of the screen. Regardless of the overall orientation of the screen, the second screen is always located between the first screen and the third screen in the direction of the screen's extension.

[0008] The third screen includes an extended state and a retracted state. When the third screen is extended, it means that it does not bend significantly and is roughly on the same plane. When the third screen is retracted, it means that at least part of it bends towards the side closer to the second main body.

[0009] Since the first main body supports the first screen and the second main body supports the second screen, when the first main body is unfolded relative to the second main body, the first screen and the second screen are on the same plane; when the first main body is folded closer to the second main body, the first screen and the second screen are folded together.

[0010] Regarding the first aspect of the electronic device, when the user wants to use a large screen, the device can unfold the first and second screens and extend a third screen, allowing all three screens to display the image to the user simultaneously, thus meeting the user's screen size requirements. When the user wants to carry the electronic device, the third screen rolls up and the first and second screens fold together, reducing the overall size of the electronic device and making it easier for the user to carry.

[0011] In one possible implementation of the first aspect, the telescopic mechanism includes a curling assembly and a telescopic assembly. The curling assembly is connected to the third screen. A first end of each telescopic assembly is connected to the second main body, and a second end of each telescopic assembly is connected to the curling assembly; the telescopic assembly is used to drive the curling assembly to move toward the second main body, or to drive the curling assembly to move away from the second main body.

[0012] For example, the telescopic mechanism includes a coiling component, and the telescopic mechanism also includes at least two telescopic components. At least two telescopic components extend simultaneously, moving a coiling component away from the second main body; or, at least two telescopic components retract simultaneously, moving a coiling component closer to the second main body.

[0013] As another example, the telescopic mechanism includes a coiling component and a telescopic component. The telescopic component moves the coiling component away from the second body portion, or moves the coiling component closer to the second body portion.

[0014] In this implementation, the telescopic component extends the third screen by moving the curling component away from the second main body; the telescopic component retracts the third screen by moving the curling component closer to the second main body. The telescopic component provides stable and strong moving power to the curling component.

[0015] In another possible implementation of the first aspect, the telescopic assembly includes a push rod and a first power unit. The push rod is connected to the coiling assembly. The first power unit is connected to the push rod. The first power unit is configured to drive the push rod to extend or retract.

[0016] In this implementation, the first power unit provides power to the push rod to drive the push rod to extend, thereby moving the coiling assembly away from the second main body; or, the first power unit provides power to the push rod to drive the push rod to retract, thereby moving the coiling assembly closer to the second main body. The telescopic assembly has a simple structure, which can reduce the manufacturing difficulty and cost of electronic devices.

[0017] In another possible implementation of the first aspect, the first power unit includes a brushless DC motor.

[0018] Brushless DC motors offer advantages such as high output power, small size, light weight, good heat dissipation, high efficiency, wide operating speed range, low electrical noise, and high reliability. Therefore, in this embodiment, the first power unit includes a brushless DC motor, which can provide power to move the winding assembly with a small-volume motor, reducing the space requirements of the electronic device. Furthermore, because brushless DC motors have a large driving force, the number of brushless DC motors used in the electronic device can be reduced, further reducing the space requirements. Additionally, due to their small size, brushless DC motors occupy less space in the thickness direction of the electronic device, allowing for thinner manufacturing processes.

[0019] In another possible implementation of the first aspect, the electronic device further includes a first processor and a second processor. The first processor is configured to output a control signal in response to an ejection signal. The second processor is coupled to the first processor and the first power unit. The second processor is configured to control the first power unit to extend or retract the push rod in response to the control signal.

[0020] For example, the first processor is a system on chip (SOC) and the second processor is a microcontroller unit (MCU).

[0021] In this embodiment, the SOC is used to determine whether the third screen of the electronic device is extended, and does not directly control the DC brushless motor in the first power unit. This is because the SOC, as a system-on-a-chip, needs to handle a large number of tasks of the electronic device. The mechanism by which the SOC handles multiple tasks is to process tasks according to their priority, processing higher-priority tasks first and then lower-priority tasks. However, in the electronic device provided in this application, controlling the DC brushless motor is a relatively long process (approximately 0.5 to 3 seconds). If the SOC directly controls the DC brushless motor to drive the push rod to extend or retract, it is easy for the SOC to process higher-priority tasks and pause control of the DC brushless motor, causing an interruption in the extension or retraction of the third screen. This could lead the user to believe that the electronic device has malfunctioned, thus reducing the user experience.

[0022] Therefore, in this embodiment, by adding an MCU dedicated to controlling the extension or retraction of the brushless DC motor drive push rod in the first power unit, the MCU will not handle other tasks during the extension or retraction of the brushless DC motor drive push rod, which can avoid the interruption of the brushless DC motor during operation, and ensure the smooth and timely extension or retraction of the third screen, thereby improving the user's experience of using electronic devices.

[0023] In another possible implementation of the first aspect, the telescopic assembly further includes a first detection sensor. The first detection sensor is connected to a first power unit and a second processor. The first detection sensor is configured to send first detection information to the second processor, the first detection information indicating the movement position of the push rod. In response to the first detection information, the second processor adjusts the rotational speed of the brushless DC motor in the first power unit.

[0024] In this embodiment, closed-loop control of the brushless DC motor in the first power unit is realized through the second processor, the first power unit, and the first detection sensor, enabling the second processor to use a closed-loop control algorithm to achieve real-time regulation of the brushless DC motor.

[0025] For example, the MCU can combine the first detection information provided by the first detection sensor in each telescopic component with the motion position information calculated based on the rotation signal, and adjust it using a closed-loop control algorithm (e.g., proportional, integral, and derivative) to output a new rotation signal to adaptively adjust the operation of each brushless DC motor.

[0026] In this embodiment, by implementing closed-loop control of the brushless DC motor in the first power unit, the control precision of the brushless DC motor can be improved, thereby enhancing the smoothness and reliability of the electronic device in extending or retracting the third screen, and improving the user experience of the electronic device.

[0027] Furthermore, as explained above, the method for controlling the brushless DC motor employs a closed-loop control system for real-time control. When handling a large number of tasks, the SOC cannot guarantee continuous computational power allocation to the closed-loop control algorithm. Therefore, adding a dedicated MCU for controlling the brushless DC motor in the first power unit can prevent pauses during operation, ensuring smooth and timely extension or retraction of the third screen, thereby improving the user experience of the electronic device.

[0028] In another possible implementation of the first aspect, the telescopic mechanism includes multiple telescopic components, with at least two telescopic components sharing the same first detection sensor.

[0029] Electronic devices have significant internal space requirements, and using different first detection sensors for different telescopic components would increase these requirements. In this embodiment, at least two telescopic components share the same first detection sensor, which reduces the number of internal detection sensors, lowers production costs, alleviates space requirements, and facilitates a thinner and lighter design.

[0030] In another possible implementation of the first aspect, the winding assembly includes a spool and a second power unit. The spool may be a cylindrical structure, with its outer circumferential surface connected to the third screen. The second power unit is connected to the spool and is used to drive the spool to rotate along its central axis, thereby deforming the third screen.

[0031] In this implementation, the second power unit provides rotational power to the scroll to drive it to rotate, thereby moving the third screen closer to the second screen or further away from it. The scroll assembly has a simple structure, which can reduce the manufacturing difficulty and cost of electronic devices.

[0032] In another possible implementation of the first aspect, the second power unit includes a brushless DC motor.

[0033] In this embodiment, the second power unit includes a brushless DC motor, which can provide the power to drive the scroll rotation with a small-sized motor, reducing the space constraints of the electronic device. Furthermore, since the brushless DC motor has a large driving force, the number of brushless DC motors used in the electronic device can be reduced, further reducing the space constraints. Additionally, due to its small size, the brushless DC motor occupies less space in the thickness direction of the electronic device, making it easier to manufacture a thinner device.

[0034] In another possible implementation of the first aspect, the electronic device further includes a first processor and a second processor. The first processor is configured to output a control signal in response to the ejection signal. The second processor is coupled to the first processor and the second power unit. The second processor is configured to control the second power unit to drive the reel to rotate in response to the control signal.

[0035] In this embodiment, an MCU is added specifically to control the DC brushless motor in the second power unit to drive the scroll to rotate. The MCU does not handle other tasks while controlling the DC brushless motor to drive the scroll to rotate, which can avoid the DC brushless motor from pausing during operation. This ensures that the third screen can be extended or retracted smoothly and in a timely manner, thereby improving the user's experience with electronic devices.

[0036] In another possible implementation of the first aspect, the winding assembly further includes a second detection sensor. The second detection sensor is connected to the second power unit and the second processor. The second detection sensor is configured to send second detection information to the second processor, the second detection information representing the rotation angle of the winding spool. In response to the second detection information, the second processor adjusts the rotational speed of the brushless DC motor in the second power unit.

[0037] In this embodiment, closed-loop control of the brushless DC motor in the second power unit is achieved through the second processor, the second power unit, and the second detection sensor, enabling the second processor to use a closed-loop control algorithm to achieve real-time regulation of the brushless DC motor.

[0038] In this embodiment, by implementing closed-loop control of the brushless DC motor in the second power unit, the control precision of the brushless DC motor can be improved, thereby enhancing the smoothness and reliability of the electronic device in extending or retracting the third screen, and improving the user's experience with the electronic device.

[0039] In another possible implementation of the first aspect, the electronic device includes a first posture and a second posture. When the electronic device is in the first posture, the first main body is flattened relative to the second main body, the telescopic mechanism is in a first state, and the first screen, second screen, and third screen are all on the same plane. After the telescopic mechanism switches from the first state to the second state, the electronic device is in the second posture. When the electronic device is in the second posture, the first main body is flattened relative to the second main body, the telescopic mechanism is in a second state, the first screen and second screen are on the same plane, and the third screen is located on the side of the second screen closer to the second main body.

[0040] In its first orientation, the electronic device's screen, including the first, middle, second, and third screens, lies on the same plane. This means the screen undergoes zero bending. The device can then display the entire screen to the user at once, showing the same image and providing a large-screen display effect.

[0041] In the second posture of the electronic device, the first screen, the middle screen, and the second screen are located on the front side of the device body and are all on the same plane. The portion of the third screen closest to the second screen is bent, while the portion of the third screen furthest from the second screen can be located on the back side of the second main body. In essence, the entire screen of the electronic device undergoes a single bend. The first, middle, and second screens are displayed together on the front side of the device body, and can display the same image. The portion of the third screen furthest from the second screen is exposed on the back side of the device body, therefore, this portion of the third screen furthest from the second screen can display a different image. Of course, in some other examples, while the first, middle, and second screens can display the same image, the portion of the third screen furthest from the second screen can also be in a screen-off state, displaying no image.

[0042] The process of switching electronic devices from the first posture to the second posture is simple and convenient for users.

[0043] In another possible implementation of the first aspect, the electronic device includes a second posture and a third posture. In the second posture, the first main body is flattened relative to the second main body, the telescopic mechanism is in a second state, the first screen and the second screen are on the same plane, and the third screen is located on the side of the second screen closer to the second main body. After the first main body is folded relative to the second main body using a rotating mechanism, the electronic device is in the third posture. In the third posture, the first main body is folded relative to the second main body, the telescopic mechanism is in a second state, the first screen is located on the side of the first main body away from the second main body, the second screen is located on the side of the second main body away from the first main body, and the third screen is located on the side of the second screen closer to the second main body.

[0044] In the third posture of the electronic device, the first and second screens are not on the same plane, and the middle screen is bent and connected to the first and second screens. The part of the third screen closest to the second screen is bent, and the part of the third screen furthest from the second screen may be located between the second main body and the first main body. Understandably, the screen of the electronic device undergoes two bends. The first and second screens are displayed on opposite sides of the device body, so the first screen can display one image independently, and the second screen can display another image independently. The part of the third screen furthest from the second screen may be obscured by the user because it may be located between the first and second main bodies; therefore, the part of the third screen furthest from the second screen may not display an image.

[0045] When the electronic device is in its third posture, its size is smaller, making it easier for users to store and carry. The process of switching the electronic device from the second to the third posture is simple and convenient for users.

[0046] Secondly, this application provides a screen unfolding method. This method is applied to an electronic device in any implementation of the first aspect. The method includes: in response to an unfolding signal, the electronic device acquires attitude information of the electronic device. The attitude information is used to indicate at least the relative position between a first screen and a second screen. When the attitude information indicates that the first screen and the second screen are flattened relative to each other, the electronic device controls a telescopic mechanism to switch from a second state to a first state to extend a third screen.

[0047] In this embodiment, when the first and second screens are not flattened, it indicates that the user does not wish to experience the large-screen display function. Therefore, the phone will not control the third screen to extend to protect it. When the first and second screens are flattened together and the phone receives an extension signal, it indicates that the user wishes to experience the large-screen display function. Therefore, the phone can control the third screen to extend, so that the first, middle, second, and third screens are simultaneously on the same plane, realizing the large-screen display function of the phone and improving the user's experience.

[0048] In one possible implementation of the second aspect, the attitude information further includes state parameters of the telescopic mechanism. When the attitude information indicates that the first and second screens are mutually flattened, the electronic device controls the telescopic mechanism to switch from the second state to the first state, including: when the attitude information indicates that the first and second screens are mutually flattened, and the state parameters indicate that the telescopic mechanism is in the second state, the electronic device controls the telescopic mechanism to switch from the second state to the first state.

[0049] In this embodiment, the state parameter indicates that when the telescopic mechanism is in the second state, the third screen is in the retracted state. At this time, the electronic device controls the telescopic mechanism to switch from the second state to the first state, which can accurately drive the telescopic mechanism to extend the third screen and improve the control accuracy of the third screen.

[0050] In another possible implementation of the second aspect, the attitude information also includes state parameters of the telescopic mechanism. After the electronic device acquires the attitude information of the electronic device, the method further includes: when the attitude information indicates that the first screen and the second screen are flattened relative to each other, and the state parameters indicate that the telescopic mechanism is neither in the first state nor in the second state, the electronic device controls the telescopic mechanism to switch to the second state.

[0051] The state parameter indicates that the telescopic mechanism is neither in the first state nor the second state, meaning that the telescopic component drives the curling component to be positioned between the position close to the second main body and the position far away from the second main body. At this time, the third screen is in a semi-extended state.

[0052] The third screen being in a semi-extended state may be due to an anomaly that occurred when the telescopic mechanism switched from the second state to the first state. Therefore, the electronic device can control the telescopic mechanism to switch from the current state to the second state, so that the third screen is in a retracted state to protect it.

[0053] In another possible implementation of the second aspect, the method further includes: when the posture information indicates that the first and second screens are not flattened, the electronic device displays a prompt message to remind the user that the third screen cannot be stretched.

[0054] To avoid the situation where the third screen fails to extend despite user interaction, causing the user to mistakenly believe the device is malfunctioning, this embodiment displays a prompt message informing the user of the reason why the third screen is not extended. This prevents the user from perceiving a malfunction and improves the interactivity between the device and the user.

[0055] In another possible implementation of the second aspect, the electronic device includes a first processor and a second processor. The electronic device acquiring posture information in response to an ejection signal includes: the first processor acquiring posture information in response to the ejection signal. If the posture information indicates that the first and second screens are mutually flattened, the electronic device controlling the telescopic mechanism to switch from a second state to a first state to extend the third screen includes: the first processor outputting a control signal to the second processor in response to the posture information indicating that the first and second screens are mutually flattened. The second processor, in response to the control signal, controls the telescopic mechanism to switch from the second state to the first state to extend the third screen.

[0056] In this embodiment, the first processor is used to determine the posture information of the electronic device. When the first processor determines that the third screen is to be extended, the second processor is dedicated to controlling the telescopic mechanism to switch from the second state to the first state. This can avoid the telescopic mechanism from pausing during the transition from the second state to the first state, ensuring that the third screen can be extended or retracted smoothly and in a timely manner, thereby improving the user's experience of using the mobile phone.

[0057] Thirdly, this application provides an electronic device. The electronic device includes a memory and one or more processors. The memory is coupled to the processors. The memory stores computer program code, which includes computer instructions that, when executed by the processor, cause the electronic device to perform the method described in any of the second aspects.

[0058] Fourthly, this application provides a computer-readable storage medium. The computer-readable storage medium includes computer instructions that, when executed on an electronic device, cause the electronic device to perform the method as described in any of the second aspects.

[0059] Fifthly, this application provides a computer program product. When the computer program product is run on an electronic device, it causes the electronic device to perform the method as described in any of the second aspects.

[0060] The beneficial effects of the third, fourth, and fifth aspects can be referred to the beneficial effects of the second aspect, and will not be elaborated here. Attached Figure Description

[0061] Figure 1 is a three-dimensional structural diagram of a mobile phone in a first posture according to some embodiments of this application;

[0062] Figure 2 is a three-dimensional structural diagram of a mobile phone in a second posture according to some embodiments of this application;

[0063] Figure 3 is a three-dimensional structural diagram of a mobile phone in a third posture according to some embodiments of this application;

[0064] Figure 4 is a schematic diagram of a rotating mechanism in a mobile phone provided in some embodiments of this application;

[0065] Figure 5 is a top view of the mobile phone shown in Figure 1 after the screen has been removed;

[0066] Figure 6 is a schematic diagram of a retractable component in a mobile phone provided in some embodiments of this application;

[0067] Figure 7 is a control logic block diagram of a telescopic component in a mobile phone provided in some embodiments of this application;

[0068] Figure 8 is a cross-sectional view along the A-A' direction in Figure 5;

[0069] Figure 9 is a schematic diagram of the movement of the third screen caused by the scroll rotation of a mobile phone according to some embodiments of this application;

[0070] Figure 10 is a control logic block diagram of a curling component in a mobile phone provided in some embodiments of this application;

[0071] Figure 11 is a schematic diagram of the motion changes of a mobile phone when the telescopic component and the curling component work together, according to some embodiments of this application;

[0072] Figure 12 shows side views of a mobile phone in three different postures according to some embodiments of this application;

[0073] Figure 13 is a flowchart of a screen unfolding method provided in some embodiments of this application;

[0074] Figure 14 is a flowchart of a screen unfolding method provided in some other embodiments of this application;

[0075] Figure 15 is a flowchart of a screen unfolding method provided in some other embodiments of this application;

[0076] Figure 16 is a flowchart of a screen unfolding method provided in some other embodiments of this application. Detailed Implementation

[0077] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application are within the scope of protection of this application.

[0078] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this application, unless otherwise stated, "a plurality of" means two or more.

[0079] Furthermore, in this application, directional terms such as "upper," "lower," "left," and "right" may be defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms can be relative concepts, used for relative description and clarification, and may change accordingly depending on the orientation of the components in the accompanying drawings.

[0080] In describing some embodiments, the terms "connected," "linked," and their derivative expressions may be used. For example, the term "connected" may be used to indicate that two or more components are in direct or indirect physical contact with each other. For example, "A and B are connected" can mean that A and B are connected directly, or it can mean that A and B are connected through other components. Furthermore, the term "coupled" can refer to an electrical connection that enables signal transmission; coupling can indicate direct coupling or indirect coupling.

[0081] "At least one of A, B and C" has the same meaning as "at least one of A, B or C", both including the following combinations of A, B and C: only A, only B, only C, combinations of A and B, combinations of A and C, combinations of B and C, and combinations of A, B and C.

[0082] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0083] As used herein, “about,” “approximately,” or “approximately” includes the value stated and the average value within an acceptable range of deviation from the given value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the given quantity (i.e., the limitations of the measurement system).

[0084] For ease of understanding, the technical terms used in this application will be explained and described below.

[0085] 1. Flexible screen

[0086] A flexible screen refers to a display screen that can be bent, folded, or even rolled up. A flexible screen can guarantee normal operation even after multiple bends / rolls (e.g., 200,000 times). In other words, a flexible screen can be bent or rolled up during the display process.

[0087] Flexible screens may include, but are not limited to, organic light-emitting diode (OLED) displays, active-matrix organic light-emitting diode (AMOLED) displays, mini organic light-emitting diode (MLED) displays, micro organic light-emitting diode (MOLED) displays, and quantum dot light-emitting diode (QLED) displays. The embodiments of this application do not limit these to any particular type.

[0088] 2. Outward-folding screen phone

[0089] Outward-folding phones use flexible screens. When an outward-folding phone is folded, the flexible screen bends and is exposed to the outside of the phone. At this time, the two display sections on either side of the bent area of ​​the flexible screen can display different images. When the outward-folding phone is unfolded, the flexible screen flattens out and can display the same image, providing users with a large-screen display effect.

[0090] 3. Inward-folding screen phone

[0091] The screen of an inward-folding phone is a flexible screen. When the phone is folded, the flexible screen bends and is hidden inside the phone. In this state, the flexible screen may not display any image. When the phone is unfolded, the flexible screen flattens out and can display the same image, providing users with a large-screen display effect.

[0092] 4. Rollable screen phone

[0093] Rollable screen phones use flexible screens. When a rollable screen phone is rolled up, part of the flexible screen is curled up and hidden inside the phone. In this case, the uncurled portion of the flexible screen displays the image, while the curled portion does not. When the rollable screen phone is extended, the flexible screen unfolds and displays the entire image, providing users with a large-screen display effect.

[0094] 5. Brushless Direct Current Motor (BLDCM)

[0095] A BLDCM can include a motor and a driver. The stator windings of the motor can be connected in a three-phase symmetrical star configuration. Permanent magnets can be installed on the rotor of the motor, and a position sensor (e.g., a Hall effect sensor) can be installed inside the motor to detect the polarity of the rotor. The driver, composed of power electronics and integrated circuits, is used to receive a start signal from the motor to control its start; or, to receive a stop signal from the motor to control its stop; or, to receive a braking signal from the motor to control its braking.

[0096] BLDCM offers advantages such as high output power, small size, light weight, good heat dissipation, high efficiency, wide operating speed range, low electrical noise, and high reliability.

[0097] For example, a BLDCM may include a hollow cup motor. A hollow cup motor may include a stator, a rotor, bearings, and sensors. The stator is typically made of laminated silicon steel sheets forming multiple slots. Coils are embedded in the slots to generate a rotating magnetic field when alternating current is applied. The rotor may be a hollow cup shape, typically made of a non-magnetic material (such as plastic, ceramic, etc.). The hollow structure of the rotor effectively reduces the weight and size of the motor, increasing power density. Permanent magnets may be installed inside the rotor. Bearings support the rotation of the rotor.

[0098] When alternating current passes through the stator coils, it generates a rotating magnetic field within the stator. This rotating magnetic field passes through the hollow section of the rotor and interacts with the permanent magnets inside the rotor. Sensors detect information such as the rotor's position and speed, feeding this information back to the controller that controls the coreless motor. The controller then adjusts the current in the stator coils based on this information, achieving precise control of the coreless motor.

[0099] Currently, consumers demand increasingly larger mobile phone screens, leading manufacturers to release a variety of large-screen phones. However, this increasing screen size results in larger phones themselves, making them less portable. To address this, foldable phones have emerged as a solution, balancing portability and large screen size. Foldable phones are compact and easy to carry when folded, and offer a large display when unfolded. However, even when unfolded, the overall screen area of ​​a foldable phone is still smaller than that of tablets and other electronic devices, failing to meet consumers' demands for larger screen sizes.

[0100] Based on this, embodiments of this application provide an electronic device and a screen unfolding method. When a user wants to use a large screen, the electronic device unfolds the first and second screens and extends the third screen, so that the first, second, and third screens simultaneously display images to the user, satisfying the user's requirements for screen size; when the user wants to carry the electronic device, the third screen rolls up and the first and second screens fold together, reducing the overall size of the electronic device and making it convenient for the user to carry.

[0101] The electronic devices provided in the embodiments of this application can be electronic devices with flexible screens. Electronic devices can include, but are not limited to, mobile phones, tablets, laptops, handheld computers, netbooks, personal digital assistants (PDAs), wearable electronic devices (smartwatches, smart bracelets, smart rings, etc.), virtual reality devices, etc., and the embodiments of this application do not limit this. The following description uses a mobile phone as an example, but it is not limited to mobile phones. Furthermore, the following description uses an outward-folding screen mobile phone as an example, but it is not limited to outward-folding screen mobile phones; it can also be an inward-folding screen mobile phone.

[0102] Figure 1 is a three-dimensional structural diagram of a mobile phone in a first posture according to some embodiments of this application; Figure 2 is a three-dimensional structural diagram of a mobile phone in a second posture according to some embodiments of this application; Figure 3 is a three-dimensional structural diagram of a mobile phone in a third posture according to some embodiments of this application.

[0103] For ease of description below, an XYZ coordinate system is established. The X-axis is defined as the direction in which the screen size of the mobile phone 100 changes under different postures, the Y-axis is defined as the direction in which the screen size remains unchanged under different postures, and the Z-axis is defined as the direction perpendicular to the screen in Figure 1. It is understood that Figures 1 to 3 only schematically show some components included in the electronic device 100, and the actual shape, size, position, and structure of these components are not limited by Figures 1 to 3.

[0104] As shown in Figures 1 to 3, the mobile phone 100 may include a screen 10, a device body 20, and a telescopic mechanism 30. The telescopic mechanism 30 is connected to the device body 20. The screen 10 is connected to both the device body 20 and the telescopic mechanism 30.

[0105] Screen 10 can be a flexible screen. Screen 10 may include a first screen 11, a second screen 12, a third screen 13, and an intermediate screen 14. The intermediate screen 14 may be located between the first screen 11 and the second screen 12, and the intermediate screen 14 is connected to the first screen 11 and the second screen 12. The second screen 12 may be located between the intermediate screen 14 and the third screen 13, and the second screen 12 is also connected to the third screen 13.

[0106] It should be noted that screen 10 is a single structure, and the first screen 11, the second screen 12, the third screen 13, and the middle screen 14 are all different parts of screen 10. The first screen 11, the middle screen 14, the second screen 12, and the third screen 13 are arranged sequentially, and adjacent parts are connected to each other. Regardless of the overall orientation of screen 10, in the extension direction of screen 10, the second screen 12 is always located between the first screen 11 and the third screen 13, and the middle screen 14 is always located between the first screen 11 and the second screen 12.

[0107] The main body 20 may include a first main body 21, a second main body 22, and a rotating mechanism 23. The rotating mechanism 23 is connected to the first main body 21 and the second main body 22. The first main body 21 and the second main body 22 can rotate relative to each other via the rotating mechanism 23.

[0108] The first main body 21 can be connected to the first screen 11, and the first main body 21 is used to support the first screen 11. The second main body 22 can be connected to the second screen 12, and the second main body 22 is used to support the second screen 12. The rotating mechanism 23 can be connected to the intermediate screen 14, and the rotating mechanism 23 is used to support the intermediate screen 14.

[0109] In this document, the side of the second main body 22 that connects to the second screen 12 is defined as the front side of the second main body 22, and the side of the second main body 22 that is away from the second screen 12 is defined as the back side of the second main body 22. Furthermore, when the first main body 21 is unfolded relative to the second main body 22 using the rotation mechanism 23, the front side of the second main body 22 is also the front side of the device body 20, and the back side of the second main body 22 is also the back side of the device body 20.

[0110] The telescopic mechanism 30 can be connected to the second main body 22. The third screen 13 is connected to the telescopic mechanism 30. The telescopic mechanism 30 can include a first state and a second state. When the telescopic mechanism 30 is in the first state, the third screen 13 extends and is on the same plane as the second screen 12, and the third screen 13 and the second screen 12 can display the same image. When the telescopic mechanism 30 is in the second state, the third screen 13 retracts relative to the second screen 12 towards the side closer to the second main body 22, and the third screen 13 and the second screen 12 are not on the same plane. The third screen 13 can display a different image from the second screen 12, or the third screen 13 can not display an image.

[0111] In some examples, when the telescopic mechanism 30 is in the second state, the third screen 13 can be stored inside the phone and not seen by the user. For example, when the telescopic mechanism 30 is in the second state, the third screen 13 can be rolled up and stored inside the phone, so that the user cannot see the third screen 13.

[0112] In other examples, when the telescopic mechanism 30 is in the second state, at least a portion of the third screen 13 can be exposed to the user on the phone 100. Exemplarily, a portion of the third screen 13 near the second screen 12 can be bent, while a portion of the third screen 13 away from the second screen 12 is located on the back side of the second main body 22. Understandably, when the telescopic mechanism 30 is in the second state, the third screen 13 bends towards the second main body 22, allowing the user to view at least a portion of the third screen 13, but the third screen 13 and the second screen 12 are not on the same plane.

[0113] In both examples above, when the telescopic mechanism 30 is in the second state, the third screen 13 is considered to be in a retracted state. The following explanation will use the example where the user can see at least part of the third screen 13 when the telescopic mechanism 30 is in the second state as an example; however, in practice, the third screen 13 may not be exposed on the phone.

[0114] Additionally, in some examples, as shown in Figures 1 to 3, the device body 20 may also include a third body portion 24. The third body portion 24 may be connected to the first body portion 21 and is located on the side of the first body portion 21 away from the second body portion 21. The third body portion 24 may be used to house hardware structures such as the motherboard, camera, and speaker of the mobile phone 100, without limitation. The motherboard may include the system-on-chip (SOC) of the mobile phone 100. Furthermore, the motherboard may also include control chips such as a microcontroller unit (MCU), without limitation.

[0115] It should be noted that circuit boards may also be included within the first main body 21 and the second main body 22. For example, in some other examples, the SOC may be located on a motherboard inside the third main body 24, and the MCU may be located on a circuit board inside the second main body 22.

[0116] Since the third main body 24 accommodates more hardware structures, its size can be larger than that of the first main body 21 in the Z-axis direction.

[0117] It should be noted that in some examples, the mobile phone 100 may not have the third main body 24. The hardware structure of the mobile phone 100, such as the motherboard, camera, and speaker, can be located in the first main body 21 or the second main body 22, and there is no limitation here.

[0118] As shown in Figure 1, when the mobile phone 100 is in the first posture, the first main body 21 unfolds relative to the second main body 22 using the rotation mechanism 23. The first main body 21, the rotation mechanism 23, and the second main body 22 are arranged sequentially in the X-axis direction, and the front and side surfaces of the first main body 21, the rotation mechanism 23, and the second main body 22 can be on the same plane. In this way, the first screen 11, the middle screen 14, and the second screen 12 can be on the same plane.

[0119] In the first state, the telescopic mechanism 30 extends outward from the second main body 22 along the X-axis, extending the third screen 13 to the front side of the device main body 20. Thus, the third screen 13 and the second screen 12 are on the same plane. It should be noted that, as mentioned in this text, the third screen 13 and the second screen 12 being on the same plane can mean that more than 90% of the screen body of the third screen 13 is on the same plane as the second screen 12.

[0120] Therefore, when the phone 100 is in its first orientation, the first screen 11, the middle screen 14, the second screen 12, and the third screen 13 of the screen 10 are all on the same plane. Understandably, the screen 10 of the phone 100 experiences zero bending. The phone 100 can display the entire screen 10 to the user at once, and the entire screen 10 can display the same image, providing the user with a large-screen display effect.

[0121] As shown in Figure 2, when the mobile phone 100 is in the second posture, the first main body 21 unfolds relative to the second main body 22 using the rotation mechanism 23. The first main body 21, the rotation mechanism 23, and the second main body 22 are arranged sequentially in the X-axis direction, and the front and side surfaces of the first main body 21, the rotation mechanism 23, and the second main body 22 are on the same plane. In this way, the first screen 11, the middle screen 14, and the second screen 12 can be on the same plane.

[0122] In the second state, the telescopic mechanism 30 does not extend outward from the second main body 22, and the third screen 13 retracts relative to the second screen 12 towards the side closer to the second main body 22. Understandably, the portion of the third screen 13 closer to the second screen 12 bends towards the second housing 22, and the portion of the third screen 13 away from the second screen 12 may be located on the back side of the second main body 22.

[0123] Therefore, when the phone 100 is in the second posture, the first screen 11, the middle screen 14, and the second screen 12 are located on the front side of the device body 20 and are all on the same plane. The portion of the third screen 13 closest to the second screen 12 is bent, while the portion of the third screen 13 furthest from the second screen 12 can be located on the back side of the second main body 22. It can be understood that the screen 10 of the phone 100 undergoes a complete bend. The first screen 11, the middle screen 14, and the second screen 12 are all displayed on the front side of the device body 20, and can display the same image. The portion of the third screen 13 furthest from the second screen 12 is exposed on the back side of the device body 20, therefore, the portion of the third screen 13 furthest from the second screen 12 can display a different image.

[0124] In this way, when the phone 100 is in the second posture, it can display one screen on the front side of the device body 20 and another screen on the back side of the device body. Of course, in some other examples, while the first screen 11, the middle screen 14 and the second screen 12 can display the same screen, the part of the third screen 13 that is far away from the second screen 12 can also be in a screen-off state and not display any screen.

[0125] As shown in Figure 3, when the mobile phone 100 is in its third posture, the first main body 21 is folded relative to the second main body 22 using the rotation mechanism 23, and the first main body 21 and the second main body 22 are stacked along the Z-axis. The first screen 11 is located on the side of the first main body 21 away from the second main body 22, and the second screen 12 is located on the side of the second main body 22 away from the first main body 21. The intermediate screen 14 is bent and connected to the first screen 11 and the second screen 12. The first screen 11, the intermediate screen 14, and the second screen 12 are arranged sequentially along the Z-axis. The first screen 11 and the second screen 12 are approximately parallel to each other and are not on the same plane.

[0126] When the telescopic mechanism 30 is in the second state, it does not extend outward from the second main body 22, causing the portion of the third screen 13 near the second screen 12 to bend towards the second housing 22. In this way, the portion of the third screen 13 near the second screen 12 can be bent, and the portion of the third screen 13 away from the second screen 12 can be located between the second main body 22 and the first main body 21.

[0127] Therefore, when the phone 100 is in the third posture, the first screen 11 and the second screen 12 are not on the same plane, and the middle screen 14 is bent and connected to the first screen 11 and the second screen 12. The part of the third screen 13 closest to the second screen 12 is bent, and the part of the third screen 13 furthest from the second screen 12 can be located between the second main body 22 and the first main body 21. It is understandable that the screen 10 of the phone 100 undergoes two bends. The first screen 11 and the second screen 12 are displayed on opposite sides of the device body 20 in the Z-axis direction, so the first screen 11 can display one image independently, and the second screen 12 can display another image independently. The part of the third screen 13 furthest from the second screen 12 may be located between the first main body 21 and the second main body 22 and is therefore obstructed from view by the user; thus, the part of the third screen 13 furthest from the second screen 12 may not display an image.

[0128] In some examples, as shown in Figure 1 or Figure 2, the surface on the back side of the third main body 24 is connected to the surface on the back side of the first main body 21, forming a flat surface. The surface on the front side of the third main body 24 protrudes relative to the surface on the front side of the first main body 21.

[0129] In this example, the surface on the back side of the third main body 24 is connected to the surface on the back side of the first main body 21, forming a flat surface. In this way, when the mobile phone 100 is in the third posture, it is easier for the first main body 21 and the second main body 22 to fit together, and the third main body 24 avoids blocking the first main body 21 and the second main body 22 from fitting together, thus improving the aesthetics of the mobile phone 100 in the third posture.

[0130] Figure 4 shows a schematic diagram of one structure of the rotating mechanism 23. The following explanation, with reference to Figure 4, describes how the second main body 22 rotates relative to the first main body 21 using the rotating mechanism 23. It should be emphasized that the example in Figure 4 is only one example of the second main body 22 rotating relative to the first main body 21 using the rotating mechanism 23. The rotation of the second main body 22 relative to the first main body 21 using the rotating mechanism 23 can also be achieved in other ways, which are not limited here. It should be considered that, where the rotation of the second main body 22 relative to the first main body 21 using the rotating mechanism 23 allows the first main body 21 and the second main body 22 to be folded or flattened, any method by which the second main body 22 rotates relative to the first main body 21 using the rotating mechanism 23 falls within the scope of this application.

[0131] As shown in Figure 4, the rotating mechanism 23 may include a hinge base 231, a first swing arm 232, and a second swing arm 233. The first end of the first swing arm 232 may be connected to the hinge base 231, and the first swing arm 232 may rotate relative to the hinge base 231; similarly, the first end of the second swing arm 233 may be connected to the hinge base 231, and the second swing arm 233 may also rotate relative to the hinge base 231.

[0132] The second end of the first swing arm 232 can be fixedly connected to the first main body 21, and the second end of the second swing arm 233 can be fixedly connected to the second main body 22.

[0133] In this way, when the user manually moves the second main body 22, the second main body 22 and the second swing arm 233 rotate together relative to the hinge seat 231, thereby changing the angle between the second main body 22 and the first main body 21, and realizing that the second main body 22 rotates relative to the first main body 21 by means of the rotation mechanism 23.

[0134] Figure 5 shows a top view of the mobile phone in Figure 1 after the screen has been removed. The following explanation, in conjunction with Figure 5, illustrates how the telescopic mechanism 30 switches between the first and second states. It should be emphasized that the example in Figure 5 is merely one example of how the telescopic mechanism 30 switches between the first and second states; other methods can also be used, which are not limited here. It should be considered that when the telescopic mechanism 30 extends the third screen 13 in the first state and retracts the third screen 13 in the second state, any method of switching the telescopic mechanism 30 between the first and second states falls within the scope of this application.

[0135] In some embodiments, as shown in FIG5, the telescopic mechanism 30 may include a telescopic component 31 and a curling component 32. One end of the telescopic component 31 may be connected to the curling component 32, and the other end of the telescopic component 32 may be connected to the second main body portion 22. The curling component 32 is also connected to the third screen 13. Extending the telescopic component 31 moves the curling component 32 away from the second main body portion 22, and retracting the telescopic component 31 moves the curling component 32 closer to the second main body portion 22.

[0136] When the telescopic mechanism 30 is in the first state, it means that the telescopic component 31 extends to move the curling component 32 away from the second main body 22; when the telescopic mechanism 30 is in the second state, it means that the telescopic component 31 retracts and moves the curling component 32 to a position close to the second main body 22.

[0137] As shown in Figure 5, in the telescopic mechanism 30, the number of telescopic components 31 can be greater than the number of coiling components 32. Exemplarily, the telescopic mechanism 30 includes one coiling component 32 and at least two telescopic components 31. At least two telescopic components 31 extend simultaneously, moving one coiling component 32 away from the second main body 22; or, at least two telescopic components 31 retract simultaneously, moving one coiling component 32 closer to the second main body 22.

[0138] At least two telescopic components can be distributed along the extension direction of the coiling component. Multiple telescopic components can provide stable and strong movement power for the coiling component.

[0139] In other examples, the number of stretching components 31 may also be equal to the number of curling components 32, which is not limited here.

[0140] The user can manually pull the coiling component 32 to extend the telescopic component 31 under the user's pulling force; or, the telescopic component 31 can retract under the user's pressure.

[0141] Alternatively, the telescopic component 31 can also be an automatically telescopic structure. As shown in Figure 5, each telescopic component 31 may include a first power unit 311 and a push rod 312. The first power unit 311 is connected to the push rod 312, and the first power unit 311 can provide a driving force to the push rod 312 to extend or retract. The first power unit 311 may be disposed inside the second main body 22. Furthermore, the second main body 22 may have a through hole, through which the push rod 312 can pass, thereby allowing the push rod 312 to extend from or retract from the second main body 22.

[0142] Figure 6(a) shows a schematic diagram of the telescopic assembly when the telescopic mechanism is in the first state; Figure 6(b) shows a schematic diagram of the telescopic assembly when the telescopic mechanism is in the second state.

[0143] In some examples, as shown in Figure 6, the first power unit 311 may include a first motor 3111, a transmission 3112, a lead screw 3113, a bracket 3114, and a moving part 3115.

[0144] When the first motor 3111 is working, the output shaft of the first motor 3111 can provide rotational force in a first direction or in a second direction.

[0145] The transmission device 3112 is connected to the output shaft of the first motor 3111 and the first end of the lead screw 3113. When the first motor 3111 is started, the output shaft of the first motor 3111 provides rotational power to the transmission device 3112. The transmission device 3112 can adjust the speed and then provide it to the first end of the lead screw 3113, so that the lead screw 3113 rotates at the adjusted speed.

[0146] For example, the transmission 3112 may include a multi-stage gear, with adjacent stages meshing with each other. The first stage gear may be connected to the output shaft of the first motor 3111, and the last stage gear may be connected to the first end of the lead screw 3113.

[0147] The bracket 3114 supports the lead screw 3113, and the second end of the lead screw 3113 is connected to the bracket 3114 via a bearing. Therefore, the lead screw 3113 can rotate in place on the bracket 3114 about its center line. The transmission device 3112 can also be mounted on the bracket 3114.

[0148] The moving part 3115 is sleeved on the lead screw 3113. Exemplarily, the outer surface of the lead screw 3113 includes an external thread, and the moving part 3115 includes an internal thread, which meshes with the external thread. The moving part 3115 does not rotate about the centerline of the lead screw 3113. Since the lead screw 3113 rotates about its centerline, the external thread will compress and rub against the internal thread during rotation, thereby providing a driving force to the moving part 3115 in the direction of the centerline of the lead screw 3113.

[0149] For example, the moving part 3115 may be a nut.

[0150] The push rod 312 can be fixedly connected to the moving part 3115. Thus, the movement of the moving part 3115 along the centerline of the lead screw 3113 can drive the push rod 312 to move synchronously, thereby extending or retracting the push rod 312. The position of the push rod 312 connected to the moving part 3115 is not limited to the one shown in Figure 6. The push rod 312 can also be connected to the surface of the moving part 3115 in the Z-axis direction, or to other surfaces that can connect to the moving part 3115 without being obstructed by the bracket 3114. These are not limited here.

[0151] In other examples, each telescopic component 31 may also include a guide rod 313. The guide rod 313 may be parallel to the lead screw 3113. The lead screw 3113 may be fixed to the bracket 3114.

[0152] The moving part 3115 can be sleeved on the guide rod 313. The surface of the moving part 3115 facing the guide rod 313 can be a smooth surface, and the surface of the guide rod 313 facing the moving part 3115 can also be a smooth surface. Understandably, the moving part 3115 is sleeved on both the lead screw 3113 and the guide rod 313. Because the moving part 3115 is also sleeved on the lead screw 3113, it will not rotate about the center line of the lead screw 3113, and the guide rod 313 can also limit the movement trajectory of the moving part 3115, thereby limiting the movement direction of the push rod 312.

[0153] For example, when the output shaft of the first motor 3111 rotates in a first orientation, it can drive the push rod 312 to extend out of the second main body 22, thereby causing the push rod 312 to move the coiling assembly 32 away from the second main body 22, so that the telescopic assembly 31 is as shown in FIG6(a). When the output shaft of the first motor 3111 rotates in a second orientation, it can drive the push rod 312 to retract into the second main body 22, thereby causing the push rod 312 to move the coiling assembly 32 towards the second main body 22, so that the telescopic assembly 31 is as shown in FIG6(b).

[0154] It should be noted that the first and second directions of rotation are opposite directions. For example, the first direction of rotation can be clockwise and the second direction of rotation can be counterclockwise; or the first direction of rotation can be counterclockwise and the second direction of rotation can be clockwise.

[0155] In other examples, the first power unit 311 can also be a device with kinetic energy, such as a cylinder. For ease of understanding, the following description will still use the example of the first power unit 311 including the first motor 3111, but it is not limited to the first power unit 311 being only the first motor 3111.

[0156] Mobile phones typically have limited internal space but a large number of hardware components, resulting in significant space constraints. Foldable phones, compared to candybar phones, also require an internal rotating mechanism, further increasing the space constraints. The mobile phone 100 provided in this application includes not only the rotating mechanism 23 for foldable phones but also a telescopic mechanism 30 for extending or retracting the third screen 13, thus placing a very large space constraint on the mobile phone 100.

[0157] Furthermore, the trend towards thinner mobile phones is currently one of the main development trends. Therefore, how to reduce the thickness of mobile phones is a problem that urgently needs to be solved in the industry.

[0158] Therefore, in some examples, the first motor 3111 may include a BLDCM (Browser-Loop Machine-Mounted Module). Because BLDCMs have high output power and small size, using a BLDCM for the first motor 3111 can maintain a small size while providing greater driving force, reducing the space constraints on the phone 100. Furthermore, since BLDCMs have greater driving force, the number of first motors 3111 used in the phone 100 can be reduced, further reducing the space constraints on the phone 100. Additionally, the small size of BLDCMs means that the first motor 3111 occupies less space in the thickness direction of the phone, making it easier to manufacture a thinner phone.

[0159] In some other examples, the first motor 3111 may also be an asynchronous motor or other suitable motor, which is not limited here.

[0160] Figure 7 shows a control logic block diagram of the telescopic assembly when the first motor 3111 includes a BLDCM. The mobile phone 100 may include a SOC 40, an MCU 50, and two of the aforementioned telescopic assemblies 31. The SOC 40 may be located on the main board of the third main body 24; the MCU 50 may be located on the main board of the third main body 24, or it may be located on the circuit board of the second main body 22. The MCU 50 is used to control the telescopic mechanism 30.

[0161] Upon receiving the extension signal for the third screen 13, the SOC 40 can detect the posture of the mobile phone 100. If the posture of the mobile phone 100 meets the requirements for the extension of the third screen 13, the SOC 40 outputs a control signal to the MCU 50. In response to the control signal, the MCU 50 controls the first motor 3111 in the telescopic assembly 31 to rotate.

[0162] For example, each telescopic component 31 may also include a first motor drive integrated circuit (IC) 313 and a first detection sensor 314.

[0163] The first motor driver IC 313 is coupled to the MCU 50 and the first motor 3111. The first motor driver IC 313 is used to drive the first motor 3111 to rotate in a first direction or in a second direction in response to the rotation signal provided by the MCU.

[0164] The first detection sensor 314 is coupled to the first motor 3111 and the MCU 50. The first detection sensor 314 is used to feed back first detection information, representing the actual movement position of the push rod 312 driven by the first motor 3111, to the MCU 50. For example, the first detection sensor 314 can obtain the actual movement position of the push rod 312 driven by the first motor 3111 by detecting the actual output speed of the first motor 3111. Also for example, the first detection sensor 314 can be disposed around the lead screw 3113, and can obtain the actual movement position of the push rod 312 driven by the first motor 3111 by detecting the amount of movement of the moving part 3115 on the lead screw 3113. Also for example, the first detection sensor 314 can be disposed on the side of the second main body 22 away from the rotating mechanism 23, and can obtain the actual movement position of the push rod 312 driven by the first motor 3111 by detecting the movement distance of the winding assembly 32.

[0165] In this way, the MCU 50 can combine the first detection information provided by the first detection sensor 314 in each telescopic component 31 with the motion position information calculated based on the rotation signal, and adjust it using a closed-loop control algorithm (e.g., proportional, integral, and derivative). It then outputs a new rotation signal to the different first motor drive ICs 313 to adaptively adjust the speed of each first motor 3111. One cycle of the closed-loop control algorithm can be on the order of milliseconds (ms) or microseconds (μs).

[0166] The MCU 50, the first motor driver IC 313, the first motor 3111, and the first detection sensor 314 together constitute the closed-loop control circuit of the first motor 3111. In this way, the MCU 50 can accurately control the speed of the first motor 3111, improving the control accuracy of the telescopic component 31.

[0167] In this embodiment, the SOC is used to determine whether the third screen 13 of the mobile phone 100 is extended, and does not directly control the operation of each first motor 3111. This is because the SOC, as a system-on-a-chip, needs to handle a large number of tasks of the mobile phone 100. The mechanism by which the SOC handles multiple tasks is that it processes tasks according to their priority, handling higher-priority tasks first and then lower-priority tasks. In the mobile phone 100 provided in this embodiment, the extension of the third screen 13 by the telescopic component 31 is a relatively long process (approximately 0.5 seconds to 3 seconds). If the SOC directly controls the first motor 3111 to drive the push rod 312 to extend or retract, it is easy for the SOC to process higher-priority tasks and pause control of the first motor 3111, causing an interruption in the extension or retraction of the third screen 13. This could lead the user to believe that the phone has malfunctioned, reducing the user's experience with the phone.

[0168] Furthermore, as explained above, the first motor 3111 is controlled in real-time using a closed-loop control circuit. When handling a large number of tasks, the SOC cannot guarantee that it can continuously dedicate computing power to the closed-loop control algorithm. Additionally, the SOC's internal clock frequency may be lower than the control frequency required by the closed-loop control circuit.

[0169] Therefore, in this embodiment, by adding an MCU dedicated to controlling the first motor 3111 to drive the push rod 312 to extend or retract, the MCU will not handle other tasks during the process of controlling the first motor 3111 to drive the push rod 312 to extend or retract, which can avoid the situation where the first motor 3111 is paused during operation, and can ensure that the third screen 13 can extend or retract smoothly and in a timely manner, thereby improving the user's experience of using the mobile phone 100.

[0170] In some examples, the mobile phone 100 may include multiple retractable components 31, wherein the first detection sensor 314 in at least two retractable components 31 may be the same first detection sensor 314.

[0171] Taking the example of two telescopic components 31 sharing the same first detection sensor 314: The first detection sensor 314 can be disposed on the side of the second main body 22 away from the rotating mechanism 23, and located between the two telescopic components 31. The first detection sensor 314 obtains first detection information by detecting the moving distance of the curling component 32 and provides it to the MCU 50. The MCU 50 then outputs a new rotation command based on the first detection information to control the first motors 3111 in the two telescopic components 31 to work respectively.

[0172] This example does not limit the detection method or specific location of the first detection sensor 314. In this example, by having at least two telescopic components 31 share the same first detection sensor 314, the number of detection sensors inside the mobile phone 100 can be reduced, thereby lowering the production cost of the electronic device, alleviating the space pressure on the electronic device, and facilitating the design of a thinner and lighter electronic device.

[0173] For example, the first detection sensor 314 may include a grating sensor. Grating sensors are characterized by high detection accuracy, low heat generation, and small size. Therefore, by employing a high-precision grating sensor in the first detection sensor 314, the accuracy of control over the first motor 3111 can be ensured. Secondly, the mobile phone 100 is prone to overheating under high load conditions, and the low heat generation of the grating sensor can prevent the overheating of the mobile phone 100 from being exacerbated, thus improving the reliability of the mobile phone 100. Furthermore, due to the small size of the grating sensor, the space requirements of the electronic device can be reduced, and the design of the electronic device can be made thinner and lighter.

[0174] Figure 8 shows a cross-sectional view along the A-A' direction in Figure 5; Figure 9 shows a schematic diagram of the rotation of the roller in the curling assembly driving the movement of the third screen.

[0175] In the X-axis direction, the winding assembly 32 can be located on the side of the second main body 22 away from the rotating mechanism 23. As shown in FIG8, the winding assembly 32 may include a second power unit and a reel 322. The second power unit is used to drive the reel 322 to rotate.

[0176] In some examples, the second power unit may include a second motor 321. In the Y-axis direction, the second motor 321 may be located on one side of the reel 322. Exemplarily, the output shaft of the second motor 321 may be connected to the reel 322. The second motor 321 is used to drive the reel 322 to rotate. Also exemplaryly, the output shaft of the second motor 321 may be connected to the reel 322 through other transmission structures. For ease of understanding, the following description uses the second motor 321 as an example of the second power unit, but it is not limited to only using the second motor 321.

[0177] When the output shaft of the second motor 321 rotates in the first direction, it can drive the reel 322 to rotate in the first direction; when the output shaft of the second motor 321 rotates in the second direction, it can drive the reel 322 to rotate in the second direction.

[0178] The outer peripheral surface of the scroll 322 can be adsorbed and connected to the inner surface of the third screen 13. Rotating the scroll 322 will cause the bending position of the third screen 13 to move away from the second main body 22, so that the third screen 13 gradually moves from the back side of the second main body 22 to the front side of the second main body 22; or, it will cause the bending position of the third screen 13 to move closer to the second main body 22, so that the third screen 13 gradually moves from the front side of the second main body 22 to the back side of the second main body 22.

[0179] For example, as shown in FIG9(a), during the counterclockwise rotation of the scroll 322 driven by the second motor 321, the bending position of the third screen 13 gradually moves away from the second main body 22, causing the third screen 13 to gradually move from the back side of the second main body 22 to the front side of the second main body 22. As shown in FIG9(b), during the clockwise rotation of the scroll 322 driven by the second motor 321, the bending position of the third screen 13 gradually moves towards the second main body 22, causing the third screen 13 to gradually move from the front side of the second main body 22 to the back side of the second main body 22.

[0180] The second motor 321 may include a BLDCM. Furthermore, the beneficial effects of the second motor 321 including a BLDCM can be referred to the beneficial effects of the first motor 3111 including a BLDCM, and will not be repeated here.

[0181] Figure 10 shows the control logic block diagram of the telescopic mechanism when both the first motor 3111 and the second motor 321 include a BLDCM. The control logic block diagram of the first motor 3111 including a BLDCM is similar to that shown in Figure 7, and will not be repeated here.

[0182] As shown in Figure 10, the second motor 321 can also be coupled to the MCU 50. Understandably, after receiving the control signal provided by the SOC, the MCU 50 responds to the control signal and controls the second motor 321 in the winding assembly 32 to rotate.

[0183] By way of example, the curling assembly 32 may also include a second motor drive integrated circuit (IC) 323 and a second detection sensor 324.

[0184] The second motor driver IC 323 is coupled to the MCU 50 and the second motor 321. The second motor driver IC 323 is used to drive the second motor 321 to rotate in a first direction or in a second direction in response to the rotation signal provided by the MCU.

[0185] The second detection sensor 324 is coupled to the second motor 321 and the MCU 50. The second detection sensor 324 is used to feed back second detection information, representing the actual rotation angle of the reel 322 driven by the second motor 321, to the MCU 50. For example, the second detection sensor 324 can obtain the actual rotation angle of the reel 322 driven by the second motor 321 by detecting the actual output speed of the second motor 321. As another example, the second detection sensor 324 can be disposed on the inner wall of the reel 322, and the second detection sensor 324 can obtain the actual rotation angle of the reel 322 driven by the second motor 321 by detecting changes in the tilt angle of the second detection sensor 324.

[0186] In this way, MCU 50 can combine the second detection information provided by the second detection sensor 324 with the rotation angle information calculated based on the rotation signal, and perform closed-loop control algorithm calculations to output a new rotation signal to the second motor driver IC 323 to adjust the speed of the second motor 321.

[0187] The MCU 50, the second motor driver IC 323, the second motor 321, and the second detection sensor 324 together constitute the closed-loop control circuit of the second motor 321. In this way, the MCU 50 can accurately control the speed of the second motor 321, improving the accuracy of the control of the winding assembly 32.

[0188] As can be seen from Figure 10, the MCU 50 can simultaneously control the operation of the first motor 3111 and the second motor 321. Therefore, the MCU 50 can also control the amount of movement of the winding component 32 in extending the third screen 13 according to the amount of movement of the telescopic component 31, ensuring the synchronicity of the operation of the first motor 3111 and the second motor 321, preventing excessive stretching or compression of the third screen 13, and improving the reliability of the extension or retraction of the third screen 13.

[0189] It should be emphasized that during the extension or retraction of the third screen 13, the telescopic component 31 and the curling component 32 work together. Figure 11 shows a schematic diagram of the motion changes when the telescopic component 31 and the curling component 32 work together.

[0190] Taking the extension of the third screen 13 as an example, as shown in Figure 11(a), when the output shaft of the first motor 3111 rotates in the first direction, it can drive the push rod 312 to extend out of the second main body 22, thereby driving the curling assembly 32 to move away from the second main body 22; at the same time, the second motor 321 is used to drive the scroll 322 to rotate counterclockwise, and the bending position of the third screen 13 gradually moves away from the second main body 22, so that the third screen 13 gradually moves from the back side of the second main body 22 to the front side of the second main body 22, and the third screen 13 and the second screen 12 are on the same plane.

[0191] Taking the winding of the third screen 13 as an example, as shown in Figure 11(b), when the output shaft of the first motor 3111 rotates in the second direction, it can drive the push rod 312 to retract into the second main body 22, thereby driving the winding assembly 32 to move closer to the second main body 22; at the same time, the second motor 321 is used to drive the winding shaft 322 to rotate in a clockwise direction, and the bending position of the third screen 13 gradually moves closer to the second main body 22, so that the third screen 13 gradually moves from the front side of the second main body 22 to the back side of the second main body 22, and the third screen 13 is located on the side of the second screen 12 closer to the second main body 22.

[0192] Figure 12 shows side views of the mobile phone in three different orientations. Figure 12(a) shows a side view of the phone in the third orientation; Figure 12(b) shows a side view of the phone in the second orientation; and Figure 12(c) shows a side view of the phone in the first orientation. The thick dashed lines in Figure 12 represent the screen.

[0193] As shown in Figure 12(a), the mobile phone 100 is in a third posture, which means that the first main body 21 is folded relative to the second main body 22 by the rotating mechanism 23. In this third posture, the rotating mechanism 23 causes the intermediate screen 14 to bend outwards. The first screen 11 is located on the side of the second screen 12 away from the first main body 21, and the second screen 12 is located on the side of the first screen 11 away from the second main body 22. Additionally, the third screen 13 is rolled up and located on the side of the second screen 12 closer to the second main body 22. At this time, the telescopic mechanism 30 is in a second state.

[0194] When the mobile phone 100 is in the third posture, the user can manually move the first main body 21 and / or the second main body 22, so that the first main body 21 rotates relative to the second main body 22 through the rotation mechanism 23, thereby enabling the mobile phone 100 to switch from the third posture to the second posture.

[0195] As shown in Figure 12(b), the mobile phone 100 is in a second posture, which means that the first main body 21 is flattened away from the second main body 22 by the rotation mechanism 23. In this second posture, the rotation mechanism 23 flattens the intermediate screen 14. The first screen 11, the intermediate screen 14, and the second screen 12 are all on the same plane. Furthermore, the third screen 13 is rolled up and located on the side of the second screen 12 closest to the second main body 22. At this time, the telescopic mechanism 30 is in a second state.

[0196] When the phone 100 is in the second posture, the user can manually pull out the curling component, causing the telescopic mechanism 30 to switch from the second posture to the first posture, thus changing the phone 100 from the second posture to the first posture. Alternatively, the user can operate the phone to trigger an extension signal for extending the third screen 13, or the phone can automatically trigger an extension signal for extending the third screen 13, causing the telescopic mechanism 30 to switch from the second posture to the first posture, thus changing the phone 100 from the second posture to the first posture.

[0197] As shown in Figure 12(c), the mobile phone 100 is in a first posture, which means that the first main body 21 is flattened away from the second main body 22 by the rotation mechanism 23. With the mobile phone 100 in the first posture, the rotation mechanism 23 causes the intermediate screen 14 to flatten. The first screen 11, the intermediate screen 14, the second screen 12, and the third screen 13 are all on the same plane. At this time, the telescopic mechanism 30 is in its first state.

[0198] Based on the hardware described above, the following describes how the mobile phone 100 controls the third screen 13 to retract or extend.

[0199] Figure 13 shows a flowchart of a screen unfolding method provided in some embodiments of this application. In the embodiments shown in Figure 13, the posture information of the mobile phone 100 includes the positional relationship between the first screen and the second screen, but does not include the positional relationship between the third screen and the second screen.

[0200] As shown in Figure 13, the screen unfolding method may include steps S510 to S550.

[0201] Step S510: The mobile phone obtains the eject signal.

[0202] The push signal is a control signal that instructs the phone to extend the third screen 13.

[0203] The eject signal can be user-triggered. For example, a user may trigger the eject signal by performing a settings operation on the phone; or, the phone may have a button that the user presses to trigger the eject signal.

[0204] The exit signal can also be automatically generated by the phone. For example, if the phone is pre-set to trigger an exit signal when launching a certain application, the phone will receive the exit signal when the user launches that application. As another example, if the phone is pre-set to trigger an exit signal when a video app is in full-screen mode, the phone will receive the exit signal when the user enables full-screen mode in the video app.

[0205] Step S520: The mobile phone responds to the push signal and obtains the mobile phone's attitude information.

[0206] The phone's orientation information can be used to represent the positional relationship between the first and second screens on the phone.

[0207] For example, the phone's orientation information can indicate that the first and second screens are folded closer together. In this way, the extension directions of the first and second screens are roughly parallel, and the first and second screens are arranged in a stacked manner along the Z-axis, with an angle of less than 5° between them.

[0208] For example, the phone's orientation information can indicate that the first and second screens are flattened away from each other. In this way, the extension directions of the first and second screens are roughly parallel, the first and second screens are arranged on the same plane, and the angle formed between the first and second screens is greater than 175°.

[0209] For example, the phone's posture information can indicate that the first and second screens are between folded and unfolded. The extension direction of the first screen intersects the extension direction of the second screen, and the angle formed between the first and second screens is greater than or equal to 5° and less than or equal to 175°. In the following text, the state in which the angle between the first and second screens is greater than or equal to 5° and less than or equal to 175° is referred to as the phone being in a semi-folded state, but the angle between the first and second screens is not limited.

[0210] Step S530: Does the phone's posture information indicate that the first screen and the second screen are flattened together?

[0211] If the posture information indicates that the first screen and the second screen in the phone are not flattened, proceed to step S540; or, if the posture information indicates that the first screen and the second screen in the phone are flattened, proceed to step S550.

[0212] Step S540: The mobile phone outputs a prompt message indicating that the third screen cannot be extended.

[0213] The first and second screens of a mobile phone are not flat. The first and second screens can be folded together, and the phone can be in a third posture. Alternatively, the first and second screens can form an angle between them, and the phone can be in a semi-folded state.

[0214] Taking an outward-folding phone as an example, regardless of whether the phone is in its third orientation or in a semi-folded state, both the first and second screens are exposed, and the user can see both. Therefore, notification information can be displayed on the first screen, the second screen, or both simultaneously. This embodiment does not limit this.

[0215] For example, the prompt message can be displayed in the form of a window, which can display the text "The current phone orientation prevents the third screen from being extended." Of course, the prompt message can also be displayed in other forms, such as an icon indicating that the third screen cannot be extended; this is not limited to these examples.

[0216] Step S550: The mobile phone controls the telescopic mechanism to switch from the second state to the first state to extend the third screen.

[0217] The telescopic mechanism being in its first state indicates that the third screen is in an extended state. Taking the telescopic mechanism, which includes a telescopic component and a curling component, as an example, the first state of the telescopic mechanism can mean that the telescopic component drives the curling component to a position away from the second main body, and the curling component transfers the third screen to the front of the device body, with the third screen and the second screen on the same plane.

[0218] The telescopic mechanism being in the second state means that the third screen is in the retracted state. Taking the telescopic mechanism, which includes a telescopic component and a retracting component, as an example, the telescopic mechanism being in the second state can mean that the telescopic component drives the retracting component to a position close to the second main body, and the retracting component bends the third screen toward the second main body, with a portion of the third screen located on the back side of the second main body.

[0219] Understandably, when the phone determines that the first screen and the second screen are flat, in response to the push-out signal, the telescopic component drives the curling component to move from a position close to the second main body to a position away from the second main body. At the same time, the curling component gradually transfers the third screen 13 from the back side of the second main body to the front side of the second main body, so that the third screen 13 and the second screen 12 are on the same plane, thereby realizing the large-screen display function of the phone.

[0220] It should be noted that switching the telescopic mechanism from the second state to the first state via mobile phone control is a relatively long process.

[0221] During this process, the telescopic component continuously drives the curling component to move from a position close to the second main body to a position away from the second main body, and the mobile phone continuously detects whether the telescopic component has driven the curling component to move into place.

[0222] If the phone detects that the telescopic component has not driven the curling component to its proper position, the phone controls the telescopic component to continue driving the curling component to a position away from the second main body; if the phone detects that the telescopic component has driven the curling component to its proper position, the process ends.

[0223] For example, the MCU continuously acquires the movement amount of the curling component provided by the first detection sensor. The MCU compares the movement amount of the curling component with a preset movement amount. If the movement amount of the curling component is less than the preset movement amount, it is considered that the telescopic component has not driven the curling component to the correct position, and the MCU controls the telescopic component to continue driving the curling component to a position away from the second main body. If the movement amount of the curling component is greater than or equal to the preset movement amount, it is considered that the telescopic component has driven the curling component to the correct position, and the MCU controls the telescopic component to stop driving the curling component to a position away from the second main body, thus ending the process.

[0224] Furthermore, during the transition from the second state to the first state of the telescopic mechanism, the entire screen may be in a black state. After the telescopic mechanism switches to the first state and the third screen and the second screen are on the same plane, the screen will light up again for display. Alternatively, during the transition from the second state to the first state of the telescopic mechanism, the screen may display a pre-set animation. After the transition from the second state to the first state and the third screen and the second screen are on the same plane, the animation will end. Alternatively, the first screen, the middle screen, and the second screen may continue to display the images displayed when the telescopic mechanism is in the second state, while the third screen, located on the front side of the second main body, displays an image that matches the image displayed on the second screen, forming a single image. In the embodiments of this application, the specific image displayed on the screen during the transition from the second state to the first state of the telescopic mechanism is not limited.

[0225] In this embodiment, when the first and second screens are not flattened, it indicates that the user does not wish to experience the large-screen display function. Therefore, the phone will not control the third screen to extend to protect it. When the first and second screens are flattened together and the phone receives an extension signal, it indicates that the user wishes to experience the large-screen display function. Therefore, the phone can control the third screen to extend, so that the first, middle, second, and third screens are simultaneously on the same plane, realizing the large-screen display function of the phone and improving the user's experience.

[0226] Figure 14 shows a flowchart of a screen unfolding method provided by some other embodiments of this application.

[0227] In some examples, as shown in Figure 14, step S550 may include steps S551 and S552.

[0228] Step S551: The mobile phone obtains the status parameters of the telescopic mechanism.

[0229] The state parameters of the telescopic mechanism can indicate that the telescopic mechanism is in the first state, at which time the curling component is located away from the second main body, and the third screen is in the extended state.

[0230] Alternatively, the state parameters of the telescopic mechanism can also indicate that the telescopic mechanism is in the second state, at which time the curling component is located near the second main body, and the third screen is in the retracted state.

[0231] Alternatively, the state parameters of the telescopic mechanism can also indicate that the telescopic mechanism is between the first state and the second state, at which time the curling component is located between the position away from the second main body and the position close to the second main body, a part of the third screen is on the same plane as the second screen, and another part of the third screen is rolled up on the side of the second screen close to the second main body (for example, another part of the third screen is located on the back side of the second main body 22), and the third screen is in a semi-extended state.

[0232] Step S552: Does the state parameter indicate that the telescopic mechanism is in the second state?

[0233] When the state parameter indicates that the telescopic mechanism is in the second state, the mobile phone is in the aforementioned second posture, and step S553 can be executed; when the state parameter indicates that the telescopic mechanism is not in the second state, step S554 can be executed.

[0234] Step S553: ​​The mobile phone controls the telescopic mechanism to switch from the second state to the first state.

[0235] When the status parameters obtained by the mobile phone indicate that the telescopic mechanism is in the second state, the third screen retracts to the side of the second screen closest to the second main body, and the third screen and the second screen are not on the same plane. Therefore, after the mobile phone receives the extension signal, the mobile phone controls the telescopic mechanism to switch from the second state to the first state. The mobile phone controls the telescopic component to gradually extend, driving the curling component to move away from the second main body.

[0236] For example, the output shaft of the first motor rotates in a first orientation, causing a push rod to extend out of the second main body, thereby causing the push rod to move the winding assembly away from the second main body. Simultaneously, as the winding assembly moves away from the second main body, the output shaft of the second motor rotates in a second orientation, causing the scroll to rotate counterclockwise. This causes the bending position of the third screen to gradually move away from the second main body, gradually transferring the third screen from the back side of the second main body to the front side, so that the third screen and the second screen are on the same plane.

[0237] After step S553 is completed, the process ends.

[0238] Step S554: Does the status parameter indicate that the telescopic mechanism is in the first state?

[0239] If the status parameter indicates that the telescopic mechanism is not in the first state, step S555 can be executed; if the status parameter indicates that the telescopic mechanism is in the first state, the process ends.

[0240] Since step S554 indicates that the first and second screens are flattened before step S554, and step S554 indicates that the telescopic mechanism is in the first state, the phone is already in the first posture. The third and second screens are on the same plane and displayed in the user's field of vision, providing a large screen display function and achieving the display effect desired by the user.

[0241] Step S555: The mobile phone controls the telescopic mechanism to switch from the current state to the second state.

[0242] Since step S555 determined that the state parameter does not indicate that the telescopic mechanism is in either the second or first state, it can be assumed that the state parameter indicates that the telescopic mechanism is between the first and second states. Understandably, the third screen is in a semi-extended state.

[0243] The third screen is in a semi-extended state, which can be attributed to an anomaly that occurred when the telescopic mechanism switched from the second state to the first state. Therefore, the phone can control the telescopic mechanism to switch from the current state to the second state, causing the third screen to retract and thus protecting it.

[0244] After step S555, you can return to step S520.

[0245] Understandably, when the third screen of the phone is in a semi-extended state, the phone will roll up the third screen after receiving the push-out signal. Then, it will re-determine whether the phone meets the conditions for the third screen to be pushed out (i.e., the first and second screens are flattened and the telescopic mechanism is in the second state). If the conditions for the third screen to be pushed out are met, the telescopic mechanism will be controlled again to extend the third screen so that the first screen, the middle screen, the second screen and the third screen are on the same plane at the same time, realizing the large-screen display function of the phone.

[0246] For example, when the first and second screens of the phone are flattened together and the third screen is in a semi-extended state, after receiving the push signal, the phone will first roll up the extended part of the third screen, and then extend the third screen again, so that the first screen, the middle screen, the second screen and the third screen are all on the same plane at the same time, thus realizing the large-screen display function of the phone.

[0247] Figure 15 illustrates screen unfolding methods provided in some other embodiments of this application. In this embodiment, the phone's posture information includes the positional relationship between the first and second screens, and the shape state of the third screen.

[0248] As shown in Figure 15, the screen unfolding method may include steps S610 to S690.

[0249] Step S610: The mobile phone obtains the eject signal.

[0250] The explanation of step S610 can be found in the explanation of step S510, and will not be repeated here.

[0251] Step S620: The mobile phone responds to the push signal and obtains the mobile phone's attitude information.

[0252] The phone's posture information includes the positional relationship between the first and second screens, as well as the shape and state of the third screen.

[0253] For example, the phone's posture information can indicate that the first and second screens are folded together, and the third screen is in a rolled-up state. Understandably, at this time, the phone is in the third posture, as shown in Figure 12(a).

[0254] For example, the phone's posture information can indicate that the first and second screens are flattened out, and the third screen is rolled up. Understandably, at this time, as shown in Figure 12(b), the phone is in the second posture.

[0255] For example, the phone's posture information could indicate that the first and second screens form an angle (greater than or equal to 5° and less than or equal to 175°), and the third screen is in a rolled-up state. Understandably, the phone is in a semi-folded state at this time.

[0256] For example, the phone's posture information could indicate that the first and second screens are flattened out, while the third screen is extended. Understandably, at this point, the phone is in the first posture, as shown in Figure 12(c).

[0257] Step S630: Does the phone's attitude information indicate that the phone is in a second attitude?

[0258] If the attitude information indicates that the phone is in the second attitude, proceed to step S640; or, if the attitude information indicates that the phone is not in the second attitude, proceed to step S650.

[0259] Step S640: The mobile phone controls the telescopic mechanism to switch from the second state to the first state.

[0260] With the phone in its second orientation, the third screen is rolled up to the side of the second screen closest to the second main body, meaning the third and second screens are not on the same plane. Therefore, after the phone receives the push-out signal, the phone control telescopic mechanism switches from the second state to the first state. The phone control telescopic component gradually extends, causing the rolling component to move away from the second main body. The rolling component gradually transfers the portion of the third screen located on the back side of the second main body to the front side of the second main body.

[0261] Step S650: The mobile phone outputs a prompt message indicating that the third screen cannot be extended.

[0262] The explanation of step S650 can be found in the explanation of step S540, and will not be repeated here.

[0263] In this embodiment, when the phone is not in the second posture, it indicates that the user does not want to experience the large-screen display function, so the phone will not control the third screen to extend in order to protect the third screen. When the phone is in the second posture and receives the push signal, it indicates that the user wants to experience the large-screen display function, so the phone can control the third screen to extend, so that the first screen, middle screen, second screen, and third screen are all on the same plane, realizing the large-screen display function of the phone and improving the user's experience of using the phone.

[0264] Figure 16 illustrates screen unfolding methods provided by other embodiments of this application.

[0265] The embodiment shown in Figure 16, based on the embodiment shown in Figure 15, further includes steps S660-S690.

[0266] If the attitude information indicates that the phone is not in the second attitude, and before executing step S650, steps S660 and S670 can also be executed.

[0267] Step S660: Does the phone's attitude information indicate that the phone is in the first attitude?

[0268] If the posture information indicates that the phone is in the first posture, it means that the third screen has been launched and the process can end; or, if the posture information indicates that the phone is not in the first posture, step S670 is executed.

[0269] Step S670: Does the phone's posture information indicate that the phone is in a third posture or a semi-folded state?

[0270] If the posture information indicates that the phone is in a third posture or a semi-folded state, proceed to step S650; or, if the posture information indicates that the phone is neither in a third posture nor in a semi-folded state, proceed to step S680.

[0271] Step S670 can represent two judgment steps: one step is for the phone to determine whether its posture information indicates that it is in a third posture, and the other step is for the phone to determine whether its posture information indicates that it is in a semi-folded state. These two judgment steps can be performed simultaneously. If either judgment step yields a "yes" result, then step S670 yields a "yes" result; if both judgment steps yield a "no" result, then step S670 yields a "no" result.

[0272] Alternatively, these two steps can be performed sequentially. Understandably, if the first judgment step yields a "yes" result, then step S670 also yields a "yes" result. If the first judgment step yields a "no" result, then the second judgment step is executed. If the second judgment step yields a "yes" result, then step S670 also yields a "yes" result; if the second judgment step yields a "no" result, then step S670 also yields a "no" result.

[0273] It should be noted that in some other examples, step S670 may be omitted. Understandably, in some examples, if the attitude information indicates that the phone is not in the first attitude, step S650 can be executed directly.

[0274] Step S680: Does the phone's posture information indicate that the third screen is in a semi-extended state?

[0275] If the posture information indicates that the third screen is in a semi-extended state, proceed to step S690.

[0276] Step S690: The mobile phone controls the telescopic mechanism to switch to the second state.

[0277] For example, when the output shaft of the first motor rotates in the second direction, it can drive the push rod to retract into the second main body, thereby causing the push rod to move the winding assembly closer to the second main body. Simultaneously, as the winding assembly moves closer to the second main body, the output shaft of the second motor rotates in the first direction, causing the reel to rotate clockwise. This causes the bending position of the third screen to gradually move closer to the second main body, gradually shifting the third screen from the front side of the second main body to the back side of the second main body, with the third screen located on the side of the second screen closer to the second main body.

[0278] After step S690 is completed, you can return to step S620.

[0279] Understandably, when the third screen of the phone is in a semi-extended state, the phone will roll up the third screen after receiving the push-out signal. Then, it will re-determine whether the phone meets the conditions for the third screen to be pushed out (i.e., the first and second screens are flattened and the telescopic mechanism is in the second state). If the conditions for the third screen to be pushed out are met, the telescopic mechanism will be controlled again to extend the third screen so that the first screen, the middle screen, the second screen and the third screen are on the same plane at the same time, realizing the large-screen display function of the phone.

[0280] For example, when the first and second screens of the phone are flattened together and the third screen is in a semi-extended state, after receiving the push signal, the phone will first roll up the extended part of the third screen, and then extend the third screen again, so that the first screen, the middle screen, the second screen and the third screen are all on the same plane at the same time, thus realizing the large-screen display function of the phone.

[0281] In this embodiment, when the phone is in the third posture or semi-folded state, it indicates that the user does not want to experience the large-screen display function. Therefore, the phone will not control the third screen to extend in order to protect it. When the phone is in the second posture and receives the push-out signal, it indicates that the user wants to experience the large-screen display function. Therefore, the phone can control the third screen to extend, so that the first screen, middle screen, second screen, and third screen are all on the same plane, realizing the large-screen display function of the phone and improving the user's experience of using the phone.

[0282] This application also provides a screen roll-up method. The screen roll-up method may include steps S710 and S720.

[0283] Step S710: The mobile phone receives the signal.

[0284] The retract signal is a control signal that instructs the phone to retract the third screen 13.

[0285] The eviction signal can be triggered by the user. For example, the user can trigger the eviction signal by performing a settings operation on the phone; or, the phone may have a button that the user can press to trigger the eviction signal.

[0286] The echo signal can also be generated automatically by the phone. For example, if the phone is pre-set to trigger an echo signal when exiting an application, the phone will receive the echo signal when the user exits the application. As another example, if the phone is pre-set to trigger an echo signal when exiting full-screen mode from a video app, the phone will receive the echo signal when the user exits full-screen mode from the video app.

[0287] Step S720: In response to the retraction signal, the mobile phone controls the telescopic mechanism to switch from the first state to the second state to retract the third screen.

[0288] The telescopic mechanism being in its first state indicates that the third screen is in an extended state. Taking the telescopic mechanism, which includes a telescopic component and a curling component, as an example, the first state of the telescopic mechanism can mean that the telescopic component drives the curling component to a position away from the second main body, and the curling component transfers the third screen to the front of the device body, with the third screen and the second screen on the same plane.

[0289] The telescopic mechanism being in the second state means that the third screen is in the retracted state. Taking the telescopic mechanism, which includes a telescopic component and a retracting component, as an example, the telescopic mechanism being in the second state can mean that the telescopic component drives the retracting component to a position close to the second main body, and the retracting component bends the third screen toward the second main body, with a portion of the third screen located on the back side of the second main body.

[0290] Understandably, when the mobile phone receives a signal, in response to the signal, the telescopic component drives the curling component to move from a position away from the second main body to a position closer to the second main body. At the same time, the curling component gradually moves the third screen from the front side of the second main body to the back side of the second main body, so that the third screen bends towards the second main body, and a portion of the third screen can be located on the back side of the second main body.

[0291] In some examples, step S720 may include: the mobile phone, in response to the retraction signal, acquiring the status parameters of the telescopic mechanism. If the status parameters indicate that the telescopic mechanism is in a first state, the mobile phone controls the telescopic mechanism to switch from the first state to a second state to retract the third screen; if the status parameters indicate that the telescopic mechanism is in the second state, the process ends.

[0292] In this embodiment, when the mobile phone receives a retraction signal, it indicates that the user no longer wants to experience the large-screen display function. Therefore, the mobile phone can control the third screen to retract, so that the third screen bends towards the second main body. A portion of the third screen can be located on the back side of the second main body to protect the third screen and reduce the size of the mobile phone, making it easier to carry.

[0293] This application also provides an electronic device, which includes a memory and at least one processor. The memory is coupled to the processor; the memory stores computer program code, which includes computer instructions. When the computer instructions are executed by the processor, the electronic device can perform the steps in the above embodiments. Of course, the electronic device may also include other discrete components, and this application does not specifically limit this.

[0294] This application also provides a computer-readable storage medium including computer instructions that, when executed on the electronic device, cause the electronic device to perform various functions or steps of the mobile phone in the above embodiments.

[0295] This application also provides a computer program product that, when run on a computer, causes the computer to perform the various functions or steps performed by the mobile phone in the above method embodiments.

[0296] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0297] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0298] The units described as separate components may or may not be physically separate. A component shown as a unit can be one or more physical units; that is, it can be located in one place or distributed in multiple different locations. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0299] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0300] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solutions of the embodiments of this application, essentially or in other words, the parts that contribute to the prior art, or all or part of the technical solutions, can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

Claims

1. An electronic device, characterized in that, include: The screen includes a first screen, a second screen, and a third screen, with the second screen located between the first screen and the third screen in the extending direction of the screen; the device body includes a rotating mechanism, a first main body, and a second main body, with the rotating mechanism connected to the first main body and the second main body, and the first main body rotating relative to the second main body using the rotating mechanism; The first main body supports the first screen, and the second main body supports the second screen; A telescopic mechanism is connected to the second main body and the third screen; the telescopic mechanism includes a first state and a second state. When the telescopic mechanism is in the first state, the third screen is extended and is on the same plane as the second screen; when the telescopic mechanism is in the second state, the third screen is rolled up and located on the side of the second screen closer to the second main body.

2. The electronic device according to claim 1, characterized in that, The telescopic mechanism includes: a curling component connected to the third screen; and a telescopic component, the first end of which is connected to the second main body and the second end of which is connected to the curling component. The telescopic component is used to drive the curling component to move closer to the second main body, or to drive the curling component to move further away from the second main body.

3. The electronic device according to claim 2, characterized in that, The telescopic assembly includes: a push rod connected to the coiling assembly; and a first power unit connected to the push rod; the power unit is configured to drive the push rod to extend or retract.

4. The electronic device according to claim 3, characterized in that, The first power unit includes a brushless DC motor.

5. The electronic device according to claim 3 or 4, characterized in that, The electronic device further includes: a first processor configured to output a control signal in response to an extension signal; a second processor coupled to the first processor and the first power unit; the second processor being configured to control the first power unit to extend or retract the push rod in response to the control signal.

6. The electronic device according to claim 5, characterized in that, The telescopic assembly further includes a first detection sensor connected to the first power unit and the second processor; the first detection sensor is configured to send first detection information to the second processor, the first detection information being used to indicate the movement position of the push rod; the second processor, in response to the first detection information, adjusts the speed of the brushless DC motor in the first power unit.

7. The electronic device according to claim 6, characterized in that, The telescopic mechanism includes multiple telescopic components, and at least two of the telescopic components share the same first detection sensor.

8. The electronic device according to any one of claims 3-7, characterized in that, The curling assembly includes: a roller, the outer peripheral surface of which is connected to the third screen; and a second power unit connected to the roller. The second power unit is configured to drive the roller to rotate, thereby deforming the third screen.

9. The electronic device according to any one of claims 1-8, characterized in that, The electronic device includes a first posture and a second posture; when the electronic device is in the first posture, the first main body is flattened relative to the second main body, the telescopic mechanism is in a first state, and the first screen, the second screen and the third screen are all on the same plane; after the telescopic mechanism switches from the first state to the second state, the electronic device is in the second posture. When the electronic device is in the second posture, the first main body is flattened relative to the second main body, the telescopic mechanism is in the second state, the first screen and the second screen are on the same plane, and the third screen is located on the side of the second screen closer to the second main body.

10. The electronic device according to any one of claims 1-9, characterized in that, The electronic device includes a second posture and a third posture. In the second posture, the first main body is flattened relative to the second main body, the telescopic mechanism is in a second state, the first screen and the second screen are on the same plane, and the third screen is located on the side of the second screen closer to the second main body. In the third posture, after the first main body is folded relative to the second main body using the rotating mechanism, the electronic device is in the third posture. In the third posture, the first main body is folded relative to the second main body, the telescopic mechanism is in a second state, the first screen is located on the side of the first main body away from the second main body, the second screen is located on the side of the second main body away from the first main body, and the third screen is located on the side of the second screen closer to the second main body.

11. A screen unfolding method, characterized in that, An electronic device as described in any one of claims 1-10; the method includes: in response to a push-out signal, the electronic device acquiring posture information of the electronic device; the posture information being used to indicate at least the relative position between the first screen and the second screen; and, when the posture information indicates that the first screen and the second screen are flattened relative to each other, the electronic device controlling the telescopic mechanism to switch from a second state to a first state to extend the third screen.

12. The method according to claim 11, characterized in that, The posture information also includes the state parameters of the telescopic mechanism; the step of the electronic device controlling the telescopic mechanism to switch from the second state to the first state when the posture information indicates that the first screen and the second screen are flattened to each other includes: when the posture information indicates that the first screen and the second screen are flattened to each other, and the state parameters indicate that the telescopic mechanism is in the second state, the electronic device controls the telescopic mechanism to switch from the second state to the first state.

13. The method according to claim 11 or 12, characterized in that, The posture information also includes the state parameters of the telescopic mechanism; after the electronic device acquires the posture information of the electronic device, the method further includes: when the posture information indicates that the first screen and the second screen are flattened to each other, and the state parameters indicate that the telescopic mechanism is neither in the first state nor in the second state, the electronic device controls the telescopic mechanism to switch to the second state.

14. The method according to any one of claims 11-13, characterized in that, The method further includes: when the posture information indicates that the first screen and the second screen are not flattened, the electronic device displays a prompt message, the prompt message being used to remind the user that the third screen cannot be extended.

15. The method according to any one of claims 11-14, characterized in that, The electronic device includes a first processor and a second processor; the step of the electronic device acquiring posture information in response to an ejection signal includes: the first processor acquiring posture information in response to the ejection signal; and the electronic device controlling the telescopic mechanism to switch from a second state to a first state to extend the third screen when the posture information indicates that the first screen and the second screen are flattened together, including: the first processor outputting a control signal to the second processor when the posture information indicates that the first screen and the second screen are flattened together; and the second processor controlling the telescopic mechanism to switch from a second state to a first state to extend the third screen in response to the control signal.

16. A computer-readable storage medium, characterized in that, Includes computer instructions that, when executed on an electronic device, cause the electronic device to perform the method as described in any one of claims 11-15.

17. A computer program product, characterized in that, When the computer program product is run on an electronic device, it causes the electronic device to perform the method as described in any one of claims 11-15.

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