A flexible display device and mobile terminal

Abstract

This application provides a flexible display device and a mobile terminal. The flexible display device includes a flexible screen, a sliding mechanism, a lifting mechanism, and a screen support plate. The sliding mechanism can drive the screen support plate to slide, allowing the flexible display device to have an unfolded state and a closed state. The flexible screen covers the screen support plate. When the flexible display device is in the closed state, the lifting mechanism is located below the screen support plate. When the flexible display device is in the unfolded state, the lifting mechanism and the screen support plate are on the same plane, and the lifting mechanism cooperates with the screen support plate to support the flexible screen. When the flexible display device is unfolded, the lifting mechanism, which was originally located below the screen support plate, is raised to the same plane as the screen support plate, filling the space formed after the screen support plate is moved away. This ensures full rigid support for the back of the flexible screen, avoiding local dents or unevenness when the flexible screen is unfolded, resulting in a more stable and better user experience when touching the screen.

Description

Technical Field

[0001] This application relates to the field of mobile terminal technology, and in particular to a flexible display device and a mobile terminal. Background Technology

[0002] The diversification of screens has provided the smart product industry with more application options, especially the emergence of flexible screens, which has added more possibilities to the currently highly homogenized smartphone industry. Among various terminal products equipped with flexible screens, the display device that enables the folding function of the flexible screen is a key component of these products.

[0003] Currently, mainstream terminal products related to flexible screens can be divided into folding and sliding types. Sliding terminals are mainly categorized into tracked rotary, spring-loaded, and motorized types. Although sliding mobile terminals have existed for some time, their application to flexible screens requires not only adherence to traditional sliding mechanisms but also more significant screen-related requirements, including maintaining the constant length of the screen's neutral layer and ensuring the screen's surface flatness.

[0004] To address the flatness issue of sliding flexible screens, some researchers have proposed using a comb-like structure with alternating left and right sides as the back support for sliding terminal screens. When the screen is closed, the combs interlock, providing good support for the back of the screen. However, when the screen is unfolded, gaps appear on the back of the screen due to the misalignment of the comb teeth, affecting the flatness of the back of the screen.

[0005] Therefore, this application proposes a new flexible display device and mobile terminal to solve the above problems. Summary of the Invention

[0006] This application provides a flexible display device and a mobile terminal to provide better back support for sliding flexible screens and improve the user experience of flexible screens in mobile terminals.

[0007] In a first aspect, this application provides a flexible display device, comprising: a flexible screen, a sliding mechanism, a screen support plate, and a lifting mechanism; the sliding mechanism can drive the screen support plate to slide, so that the flexible display device has an unfolded state and a closed state; the flexible screen covers the screen support plate; when the flexible display device is in the closed state, the lifting mechanism is located below the screen support plate, and the screen support plate provides direct support for the flexible screen; when the flexible display device is in the unfolded state, the lifting mechanism and the screen support plate are located on the same plane, and the lifting mechanism and the screen support plate cooperate to support the flexible screen.

[0008] The flexible display device provided in this application has two states: unfolded and closed. The state of the flexible display device is consistent with the state of the flexible screen and the sliding mechanism. That is, when the flexible screen and the sliding mechanism are in the unfolded state, the flexible display device is also in the unfolded state; when the flexible screen and the sliding mechanism are in the closed state, the flexible display device is also in the closed state. The sliding mechanism is connected to the screen support plate, and the screen support plate is fixedly connected to the flexible screen. Therefore, when the sliding mechanism unfolds, it can drive the screen support plate and the flexible screen to slide, thereby unfolding the entire flexible display device. When the flexible display device unfolds, the lifting mechanism, which was originally located below the screen support plate, is raised to the same plane as the screen support plate, filling the space formed after the screen support plate is moved away. This ensures full rigid support for the back of the flexible screen, avoiding local dents or unevenness when the flexible screen unfolds, resulting in a more stable touch experience and a better user experience.

[0009] In one possible implementation of the aforementioned flexible display device, the lifting mechanism includes two planar cam plates arranged opposite each other, wherein the upper planar cam plate is the upper cam plate and the lower planar cam plate is the lower cam plate. The upper cam plate can cooperate with the lower cam plate to raise or lower the lifting mechanism. By cooperating with the screen support plate, the flexible screen can obtain stable rigid support when closing and unfolding.

[0010] In one possible implementation of the aforementioned flexible display device, when the flexible display device is in a closed state, the cams of the upper cam plate and the lower cam plate mesh with each other, and the lifting mechanism is in a low position. When the flexible display device is in an unfolded state, the cam of the upper cam plate is lifted by the cam of the lower cam plate, and the lifting mechanism is in a raised state. The cam plate has several cams at even intervals. The specific shape of the outer contour of the cam is not limited; for example, it can be any protrusion with a certain horizontal plane, such as a trapezoid, so that the protrusions of the upper and lower cam plates can support each other to lift the upper cam plate. Furthermore, the cam can also be partially hollow inside. The outer contours of the cam of the upper cam plate and the recess of the lower cam plate are the same, and the outer contours of the cam of the lower cam plate and the recess of the upper cam plate are the same. Thus, when the flexible display device is in a closed state, the cam of the upper cam plate fits against the recess of the lower cam plate, and the cam of the lower cam plate fits against the recess of the upper cam plate. The cams of the upper and lower cam plates mesh with each other, the upper cam plate falls down, the gap between the upper and lower cam plates is compressed, and the entire lifting mechanism is in a low position. When the flexible display device is in the unfolded state, the cam of the upper cam plate is lifted by the cam of the lower cam plate, causing the upper cam plate to rise. At this time, the entire lifting mechanism is in the raised state, and the upper cam plate and the screen support plate are on the same horizontal plane, which can jointly provide stable support for the flexible screen.

[0011] In one possible implementation of the aforementioned flexible display device, the sliding mechanism includes a fixed plate and a sliding plate. First slide rails are symmetrically arranged on both sides of the fixed plate, and the first slide rails are parallel to the sliding direction of the flexible screen. Sliding posts are symmetrically arranged on both sides of the sliding plate, and the sliding posts pass through the first slide rails, slidably connecting the fixed plate and the sliding plate. The fixed plate can be fixedly connected to the frame of the mobile terminal, or the fixed plate can be part of the frame. The sliding posts of the sliding plate pass through the first slide rails. During the unfolding of the flexible screen, the sliding plate slides outwards. When the sliding post reaches the end of the first slide rail, the fixed plate blocks the sliding post, preventing it from sliding further, thus locking the sliding plate.

[0012] In one possible implementation of the aforementioned flexible display device, second slide rails are connected to both sides of the lower cam, and these second slide rails cover the first slide rails on both sides. The second slide rails are slightly shorter than the first slide rails. A sliding post on each side of the sliding plate passes through the second and first slide rails on the same side, slidably connecting the sliding plate and the lower cam plate. During the unfolding of the flexible screen, the sliding plate slides outward, first reaching the end of the second slide rail connected to the lower cam plate, but not yet reaching the end of the first slide rail on the fixed plate. Since the lower cam plate is not fixedly connected to the frame of the mobile terminal, the sliding post can drive the lower cam plate to move until the sliding post contacts the end of the first slide rail on the fixed plate and stops moving. After the lower cam plate moves a short distance driven by the sliding post, it locks. The interference caused by the relative sliding of the cams on the upper and lower cam plates pushes the upper cam plate upward, thus putting the lifting mechanism in a raised state. During the closing process of the flexible screen, when the sliding plate slides to the point of being fully closed, the sliding column drives the second slide rail to move a short distance, and the second slide rail in turn drives the lower cam plate to move a short distance, so that the cam of the lower cam plate engages with the cam of the upper cam plate, and the lifting mechanism returns to the low position.

[0013] In one possible implementation of the aforementioned flexible display device, an elastic component is disposed on the first and / or second slide rails. During the sliding process of the sliding plate, the sliding column compresses the elastic component, causing the elastic component to deform. The elastic component can be cylindrical, cuboid, or similar in shape. The sliding column and the elastic component cooperate to form damping on the sliding column, thereby adjusting the sliding speed of the sliding plate and making the sliding of the flexible screen more stable.

[0014] In one possible implementation of the aforementioned flexible display device, the sliding mechanism further includes two symmetrically arranged spring torsion mechanisms; one end of each spring torsion mechanism is hinged to a fixed plate, and the other end is hinged to a sliding plate. The spring torsion mechanism includes two sets of symmetrical springs and sliders. The springs are fixed to the sliders. When the sliding plate slides, it drives the sliders to move, thereby compressing or extending the springs. When the direction of the spring's opening force changes, it provides torques for automatic closing and opening, respectively, to achieve smooth opening and closing of the flexible display device. In some embodiments, the opening and closing force can be controlled by adjusting the number of springs in the torsion mechanism to provide a better user experience.

[0015] In one possible implementation of the aforementioned flexible display device, the sliding mechanism includes a spring assembly disposed on the opening side of the flexible display device. During the unfolding process of the flexible display device, when it is about to be fully unfolded, the spring assembly disposed on the opening side is compressed, thereby providing a reverse force to the sliding plate, which serves to dampen vibration and adjust the unfolding time.

[0016] By combining the aforementioned elastic components, spring torque mechanism, and spring assembly, users can adjust and control the torque and opening / closing time when manually opening and closing the flexible screen, resulting in a more comfortable experience. It should be understood that the elastic components, spring torque mechanism, and spring assembly can be used individually or in any combination.

[0017] In one possible implementation of the aforementioned flexible display device, a synchronization mechanism is also included. This mechanism comprises two symmetrically arranged conveyor belt structures. Each conveyor belt structure includes two rollers and a metal strip wound around the outside of the two rollers. The central axis of each roller is fixed and perpendicular to the sliding direction of the flexible screen. The conveyor belts are parallel to the sliding direction of the flexible screen, and the metal strips on both the upper and lower sides are rigidly fixedly connected to a sliding plate. This ensures that the speed of the upper and lower sides of the flexible screen is consistent when the sliding plate slides, preventing localized arching of the flexible screen.

[0018] Each roller has multiple uniform protrusions along its outer edge, and the metal strip has multiple holes with equal spacing between any two holes. The arc length between two protrusions on the outer edge of the roller is equal to the spacing between two holes in the metal strip. The engagement between the protrusions on the roller and the holes in the metal strip ensures that the length changes of the exposed and hidden portions of the flexible screen are consistent as it rolls upwards along the scroll axis, thus preventing localized arching or jamming during the rolling process.

[0019] Secondly, this application also provides a mobile terminal, including a frame and a flexible display device as described in the first aspect and any possible implementation thereof. The frame has an accommodating space, in which the flexible display device is disposed. An opening is provided on the side wall of the frame for the flexible display device to unfold or close. The technical effects of the mobile terminal provided in the second aspect are described in the relevant description of the first aspect, and will not be repeated here.

[0020] In one possible implementation of the second aspect, a spring is provided between the upper cam plate and the frame component. One end of the spring is fixedly connected to the frame component, and the other end is fixedly connected to the upper cam plate. The spring is perpendicular to both the upper cam plate and the frame component. When the flexible display device unfolds, the upper cam plate is raised, the spring is stretched, and the spring exerts a downward pulling force on the upper cam plate. When the flexible display device returns from the unfolded state to the closed state, the pulling force of the spring structure causes the upper cam plate to smoothly slide down to the lower position and engage with the lower cam plate. Multiple springs can be symmetrically arranged, and the pulling force can be adjusted by the number of springs.

[0021] By using the flexible display device provided in this application, a stable rigid support can always be provided for the flexible screen in a mobile terminal with a sliding flexible screen, and the sliding process of the flexible screen can be guaranteed to be smooth, flat and without arching. This not only brings a better experience to the user, but also reduces the wear and tear of the flexible screen and extends the service life of the flexible screen and the mobile terminal. Attached Figure Description

[0022] Figure 1a A perspective view of a mobile terminal in a closed state provided in an embodiment of this application;

[0023] Figure 1b A perspective view of the unfolded state of the mobile terminal provided in an embodiment of this application;

[0024] Figure 2 A side view of a mobile terminal in closed and unfolded states provided in an embodiment of this application;

[0025] Figure 3 An exploded view of the flexible display device provided in the embodiments of this application in its unfolded state;

[0026] Figure 4 Test diagrams and partial enlarged views of the lifting mechanism provided in the embodiments of this application;

[0027] Figure 5 A schematic diagram of the support structure of the flexible display device provided in the embodiments of this application in its closed and unfolded states;

[0028] Figure 6 A side view of a spring structure for connecting an upper cam plate and a frame, provided in an embodiment of this application;

[0029] Figure 7 This is a schematic diagram of the sliding mechanism provided in the embodiments of this application in its closed and unfolded states;

[0030] Figure 8 This is a schematic diagram of the structure of a spring torsion mechanism provided in an embodiment of this application;

[0031] Figure 9 A schematic diagram illustrating the state of the spring torsion mechanism provided in the embodiments of this application during the unfolding and closing of the flexible screen;

[0032] Figure 10 This is a schematic diagram of the structure of the buffer spring assembly disposed on the sliding mechanism according to an embodiment of this application;

[0033] Figure 11 A schematic diagram of the structure of the elastic component disposed on the side of the slide rail according to an embodiment of this application;

[0034] Figure 12 A perspective view of the synchronization mechanism provided in the embodiments of this application;

[0035] Figure 13 An exploded view of the synchronization mechanism provided in the embodiments of this application. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0037] Today, mobile terminal applications such as mobile phones, tablets, or laptops are becoming increasingly popular. However, mobile terminals currently face a contradiction between portability and user experience. For example, when the screen is small, the mobile terminal is more portable, but the user's viewing experience is limited by the screen size, and the user experience is not satisfactory. On the other hand, increasing the screen size improves the user experience, but brings about the problem of inconvenience.

[0038] To address these challenges, the industry has proposed applying flexible screens to mobile devices. A flexible screen is one that can be folded and bent. When folded, this improves the portability of the mobile device while also enhancing its security. For example, when folded, the device can be held with one hand or easily placed in a pocket. When unfolded, the flexible screen provides a larger display area, improving the user experience. For instance, it offers more and larger content for watching movies, editing text, and playing games, thus improving visual effects and work efficiency.

[0039] In sliding-out mobile terminals using flexible screens, all areas of the flexible screen can be well supported when the screen is closed. However, after the screen is unfolded, a support structure is often needed to ensure stable support. The flexible display device provided in this application can provide stable support for the back of the flexible screen in both the unfolded and closed states. The flexible display device provided in this application can be applied to any sliding-out mobile terminal with a flexible screen. It should be understood that the mobile terminal in this application can include electronic devices with flexible screen structures such as mobile phones, tablets, laptops, and wearable devices.

[0040] It is understood that the terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise.

[0041] Furthermore, references to "one embodiment" or "some embodiments" in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0042] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0043] This application provides a mobile terminal 100, whose display screen is a sliding, unfoldable flexible screen 10. For example... Figure 1a and Figure 1b As shown, the mobile terminal 100 has two states: a closed state and an unfolded state. Figure 1a As shown, the mobile terminal 100 is in a closed state, and the displayed screen area 10A coincides with the frame 20 of the mobile terminal. This is also referred to as the flexible screen 10 being in a closed state. Figure 1bIn the unfolded state shown, the flexible screen 10 extends outside the frame 20 to achieve a larger display area; this state is also referred to as the flexible screen 10 being in the unfolded state.

[0044] For ease of description, in this embodiment, the side of the flexible screen 10 extending out of the frame 20 is referred to as the open side, and the opposite side is referred to as the closed side. When the user holds the mobile device with the left side being the closed side and the right side being the open side, "up" can be used to indicate the top of the flexible screen display interface, and "down" can be used to indicate the bottom of the flexible screen display interface. In this embodiment, the direction in which the flexible screen slides to the left or right is collectively referred to as the sliding direction of the flexible screen.

[0045] Figure 2 This is a side view of the frame 20 and flexible screen 10 of the mobile terminal 100 in its closed and unfolded states. Figure 2 As shown, the mobile terminal 100 includes a frame 20 with a receiving space 20A, within which a flexible display device is disposed. An opening is formed in the side wall of the frame 20 to allow the flexible screen 10 of the flexible display device to unfold or retract. In the closed state, the portion of the flexible screen 10 used for display is 10A, and the portion retracted within the frame 20 is 10B. In the unfolded state, the flexible screen 10 extends out of the frame 20 from the opening side, and the portion 10B originally retracted within the frame 20 rolls onto the frame for display. The lateral sliding of the flexible display device provided in this application enables the unfolding and retraction of the flexible screen 10.

[0046] Furthermore, the mobile terminal 100 also includes a circuit board, a power supply, and other control devices disposed within the accommodating space 20A. The circuit board is electrically connected to the flexible display device to provide corresponding control signals to the flexible display device. Optionally, the flexible display device is also equipped with a power mechanism, and the circuit board is electrically connected to the power mechanism of the flexible display device to control the power mechanism to provide driving force; the circuit board is also electrically connected to the flexible screen 10 of the flexible display device to control the display on the flexible screen 10. In addition, the mobile terminal 100 also includes some structures common to conventional mobile terminals, such as a communication interface, a processor, and a memory.

[0047] Figure 3 An exploded view of the flexible display device in its unfolded state, as provided in an embodiment of this application. Figure 3As shown, the flexible display device provided in this application embodiment includes a flexible screen 10, a screen support plate 60, a lifting mechanism 40, and a sliding mechanism 50. The flexible screen 10 is rigidly connected to the screen support plate 60, and the screen support plate 60 is fixedly connected to the sliding mechanism 50. Therefore, the sliding mechanism 50 can drive the flexible screen 10 and the screen support plate 60 to slide, so that the flexible display device has an unfolded state and a closed state. When the flexible display device is closed, the lifting mechanism 40 is located below the screen support plate 60, and the screen support plate 60 supports the flexible screen 10. When the flexible display device is unfolded, the screen support plate 60 slides out with the sliding mechanism 50, and the lifting mechanism 40 is lifted to the same plane as the screen support plate 60 to fill the gap after the screen support plate 60 is extended. At this time, the lifting mechanism 40 and the screen support plate 60 jointly support the flexible screen 10.

[0048] Furthermore, the aforementioned flexible display device also includes a synchronization mechanism 30, which is fixedly connected to the screen support plate 60. The synchronization mechanism 30 is used to synchronize different parts of the flexible screen 10 during the sliding process driven by the sliding mechanism 50, so as to prevent the flexible screen 10 from arching or getting stuck when sliding.

[0049] The following is combined with Figures 4-13 This application provides a detailed description of the various components of the flexible display device provided in the embodiments.

[0050] Figure 4 The diagram shows a cross-section and a partially enlarged view of the lifting mechanism 40 provided in this embodiment of the application in the closed and unfolded states of the mobile terminal 100. The lifting mechanism 40 includes two planar cam plate structures arranged vertically. The upper planar cam plate 40A is the upper cam plate, and the lower planar cam plate 40B is the lower cam plate. The upper cam plate 40A can be vertically raised and lowered to support the screen, and the lower cam plate 40B is connected to a slide rail and can slide left and right.

[0051] The cam plate has several cams with equal spacing. The specific shape of the outer contour of the cams is not limited; for example, it could be... Figure 4The trapezoidal shape shown has any protrusions on a certain horizontal plane so that the protrusions of the upper and lower cam plates can support each other to lift the upper cam plate 40A. Furthermore, the cam may also have a partial hollow section inside. The outer contours of the cam of the upper cam plate 40A and the recess of the lower cam plate 40B are the same, and the outer contours of the cam of the lower cam plate 40B and the recess of the upper cam plate 40A are the same. Thus, when the flexible display device is in the closed state, the cam of the upper cam plate 40A fits into the recess of the lower cam plate 40B, and the cam of the lower cam plate 40B fits into the recess of the upper cam plate 40A. The cams of the upper and lower cam plates interlock, the upper cam plate 40A falls down, the gap between the upper cam plate 40A and the lower cam plate 40B is compressed, and the entire lifting mechanism is in a low position. At this time, the flexible screen's display portion 10A and the screen support plate 60 are placed on top of the lifting structure 40.

[0052] When the flexible display device is in the unfolded state, the lower cam plate 40B is moved a short distance, and the two rows of planar cams that are inclined and attached slide relative to each other, causing the cam of the upper cam plate 40A to be lifted by the cam of the lower cam plate 40B. The upper cam plate 40A is raised, and the entire lifting mechanism 40 is in the raised state, which is used to fill the space formed after the screen support plate 60 is removed, ensuring support for the screen that is subsequently flipped up. In the unfolded state, the protruding parts of the two rows of planar cam plates press against each other, and the upper cam plate 40A and the screen support plate are on the same horizontal plane, which can jointly provide stable support for the flexible screen 10.

[0053] Figure 5 The positional relationship between the screen support plate 60 and the upper cam plate 40A when the aforementioned flexible display device is closed and unfolded is shown.

[0054] Optionally, such as Figure 6As shown, a vertical spring structure 40C (i.e., perpendicular to the plane of the upper cam plate 40A) is also provided between the upper cam plate 40A and the frame component 20A. The spring structure 40C passes through the lower cam plate 40B, with its bottom fixed to the frame component 20A and its top fixed to the upper cam plate 40A. In one possible embodiment, the fixing plate 50A is fixedly connected to the frame component 20A and can be considered as an integral part. In another possible embodiment, the frame component 20A is the fixing plate 50A. When the flexible display device is unfolded, the upper cam plate 40A is raised, and the spring structure 40C is stretched. The spring structure 40C exerts a downward pulling force on the upper cam plate 40A, but at this time, the cam of the upper cam plate 40A is lifted by the cam of the lower cam plate 40B and will not slip to the lower position due to the pulling force of the spring structure 40C. During the process of the flexible display device returning from the unfolded state to the closed state, the tension of the spring structure 40C causes the upper cam plate 40A to slide smoothly to the lower position and engage with the lower cam plate 40B, which can reduce the vibration of the flexible screen 10. It should be understood that there can be multiple spring structures 40C, as long as they are symmetrically arranged between the upper cam plate 40A and the frame component 20A to ensure that the tension on the symmetrical positions of the upper cam plate 40A is the same.

[0055] Figure 7 The diagram shows the sliding mechanism 50 provided in this embodiment in both closed and open states. The sliding mechanism 50 includes a fixed plate 50A and a sliding plate 50B. The fixed plate 50A is part of the frame 20, or the fixed plate 50A is fixedly connected to the frame 20. First slide rails are symmetrically arranged on the upper and lower sides of the fixed plate 50A, and the first slide rails are parallel to the sliding direction of the flexible screen 10. The fixed plate 50A and the sliding plate 50B are slidably connected through the first slide rails, allowing the sliding plate 50B to slide left and right along the slide rails, thus realizing the opening and closing of the flexible display device. Sliding columns 90 are also symmetrically arranged on the upper and lower sides of the sliding plate 50B (see...). Figure 11 The sliding column 90 passes through the first slide rail at the corresponding position. During the unfolding process of the flexible screen 10, the sliding column 90 slides outward with the sliding plate 50B. When the sliding column 90 reaches the end of the first slide rail, the fixing plate 50A blocks the sliding column 90, and the sliding column 90 can no longer slide, thereby locking the sliding plate 50B.

[0056] like Figure 3As shown, second slide rails are connected to both sides of the lower cam plate 40B of the lifting mechanism 40. The second slide rails on both sides cover the first slide rails on both sides of the sliding mechanism 50. The second slide rails are slightly shorter than the first slide rails. The sliding column 90 on each side of the sliding plate 50B passes through the second slide rail and the first slide rail on the same side, slidably connecting the sliding plate 50B and the lower cam plate 40B. During the unfolding process of the flexible screen 10, the sliding plate 50B slides outward, first reaching the end of the second slide rail connected to the lower cam plate 40B, but not yet reaching the end of the first slide rail. Since the lower cam plate 40B is not fixedly connected to the frame of the mobile terminal 100, the sliding column 90 can drive the lower cam plate 40B to move until the sliding column 90 contacts the end of the first slide rail and stops moving. After the lower cam plate 40B is moved a short distance by the sliding column 90, it locks. The interference caused by the relative sliding of the cams of the upper and lower cam plates pushes the upper cam plate 40A upward, thereby putting the lifting mechanism 40 in a raised state. During the closing process of the flexible screen 10, when the sliding plate 50B slides to the point of being fully closed, the sliding column 90 drives the second slide rail to move a small distance, and the second slide rail in turn drives the lower cam plate 40B to move a small distance, so that the cam of the lower cam plate 40B engages with the cam of the upper cam plate 40A, and the lifting mechanism 40 returns to the low position.

[0057] Optionally, spring torsion mechanisms 50C are symmetrically arranged on the upper and lower sides of the flexible display device. One end of the spring torsion mechanism 50C is hinged to the fixed plate 50A, and the other end is hinged to the sliding plate 50B. Both can rotate and are initially in a slightly compressed state to ensure the stability of the mechanism through pre-pressure.

[0058] Figure 8 This is a schematic diagram of the spring torsion mechanism 50C, as shown below. Figure 8 As shown, the spring torque mechanism 50C includes two sets of spring assemblies 50C1 and two sets of sliders 50C2. The two sets of spring assemblies are parallel to each other. When the spring assembly 50C1 is compressed or extended, it drives the slider 50C2 to slide along the axial direction of the spring assembly, thereby driving the sliding plate 50B to slide, so as to realize the automatic unfolding and automatic closing of the flexible display device.

[0059] Figure 9 This describes the state changes of the spring torsion mechanism 50C during the unfolding and closing of the flexible display device. For example... Figure 9 As shown, during the unfolding of the mobile terminal 100, the sliding plate 50B drives the spring torque mechanism 50C to rotate. Since the spring torque mechanism 50C is set at an angle to the sliding direction (see reference...), Figure 7When sliding to the intermediate state, the compression of the spring torque mechanism 50C is at its maximum, and the counterforce provided by the spring assembly 50C1 reaches its maximum. After the forces of the two symmetrically arranged spring torque mechanisms 50C are combined, the forces perpendicular to the sliding direction of the slide plate 50B cancel each other out, leaving only the force parallel to the sliding direction of the slide plate 50B. During the unfolding process of the mobile terminal 100, after passing the intermediate state, the compression of the spring torque mechanism 50C weakens, and the spring assembly 50C1 releases pressure in the unfolding direction, forming a self-opening effect. Conversely, during the closing process of the mobile terminal 100, after passing the intermediate state, the spring torque mechanism 50C releases pressure in the closing direction, forming a self-closing effect. As described above, the self-opening and closing effect of the mechanism is formed by the change in the direction of the spring torque mechanism 50C and the resulting compression / release of the spring torque mechanism 50C. The opening and closing force of the spring torque mechanism 50C can be adjusted by changing the number of configured spring assemblies 50C1 to provide the best feel. Some solutions use motors to achieve the opening and closing effect of flexible screens, but this design structure lacks damping effect when opening and closing, resulting in a lack of tactile feedback for users.

[0060] Optionally, a buffer component can also be provided in the flexible display device to buffer the flexible screen 10 during the unfolding and closing process, so as to avoid damage to the flexible screen 10.

[0061] In one possible implementation, such as Figure 10 As shown, a spring assembly 70 is provided on the open side of the flexible display device. During the unfolding process of the flexible screen 10, when the flexible screen 10 slides to almost fully unfold, the compression of the buffer spring assembly 70 achieves shock absorption and adjustment of the unfolding time. It should be understood that there may be multiple springs in the spring assembly 70. Figure 10 The two springs shown are merely illustrative and do not constitute a limitation on the number of springs.

[0062] In another possible implementation, such as Figure 11 As shown, an elastic component 80 is provided on the side of the slide rail of the flexible display device. A sliding column 90 is connected to the sliding plate 50B. During the sliding process of the sliding plate 50B, the sliding column 90 slides together with the sliding plate 50B. The sliding column 90 presses against the elastic component 80, causing the elastic component 80 to deform and generate frictional resistance to adjust the sliding speed of the sliding plate 50B, thereby adjusting the opening and closing time of the flexible screen 10. Figure 11 The elastic component 80 described here is a rod-shaped elastic element. The elastic component 80 can also be other shapes such as a cuboid; the shape of the elastic component 80 is not limited in this embodiment. Figure 11 In the middle, the elastic component 80 is disposed on the second slide rail, and the first slide rail is covered by the second slide rail and is not in the middle. Figure 11As shown in the diagram, it should be understood that the elastic component 80 can be configured alone on the first slide rail or the second slide rail, or the elastic component 80 can be configured on both the first and second slide rails. In all cases, it can achieve the effect of adjusting the sliding speed in conjunction with the sliding column 90. Figure 11 This does not constitute a limitation on this application.

[0063] Figure 12 and Figure 13 This is a schematic diagram of the synchronization mechanism 30 provided in the embodiments of this application. The position of the synchronization mechanism 30 in the entire mobile device 100 can be referenced. Figure 3 The synchronization mechanism 30 includes two symmetrically arranged conveyor belt structures. Each conveyor belt structure includes two rollers 110 and a metal belt 120. The metal belt 120 is wound around the outside of the two rollers 110. The central axis of each roller is fixed and perpendicular to the sliding direction of the flexible screen 10. The direction of the conveyor belt structure is parallel to the sliding direction of the flexible screen 10. The rotation of the conveyor belt structure can drive the flexible screen 10 to unfold or close. The metal belts 120 on both sides are rigidly connected to the sliding plate 50B to achieve synchronous movement of the sliding plate 50B, the metal belts 120 on both sides, and the four rollers 110.

[0064] Furthermore, to ensure that the length changes of the exposed portion and the hidden portion of the flexible screen 10 are consistent during the upward rolling process, uniform protrusions 110A are provided on the two rollers 110 of each conveyor belt structure. The arc length between the two protrusions 110A on the outer edge of the roller 110 is equal to the distance between the two holes 120A on the metal belt 120. It should be understood that this application does not limit the specific value of the distance between the two holes on the metal belt 120, as long as the distance between the two holes on the metal belt 120 is equal to the arc length between the two protrusions on the roller 110, so that the metal belt 120 and the roller 110 can cooperate with each other to ensure the flatness of the flexible screen 10 during the unfolding and closing process.

[0065] Existing designs utilize a double-drawer-style casing, where the relative separation and collision of the left and right casings enables the flexible display device to unfold and close. However, such mechanisms are prone to trapping hands or foreign objects, accelerating wear and tear on the flexible screen. This application, through the aforementioned synchronization mechanism 30, ensures that all parts of the flexible screen 10 move smoothly and consistently during unfolding and closing, preventing wrinkles or jamming in certain areas of the flexible screen and thus extending the lifespan of the mobile terminal 100.

[0066] In summary, the flexible display device provided in this application embodiment, when applied to a mobile terminal, can provide stable rigid support for the flexible screen at any time through the cooperation of the lifting mechanism 40 and the screen support plate 60. Combined with some unique designs of the sliding mechanism 50, it can provide a better tactile experience and cushioning for the opening and closing of the flexible screen. Furthermore, this application also provides a synchronization mechanism 30, which can ensure that the flexible screen unfolds and closes smoothly, without arching or jamming. Moreover, the flexible display device provided in this application has a simple structure and is easy to implement, which helps to improve the user experience and lifespan of flexible screen mobile terminals, and has good development and application prospects.

[0067] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A flexible display device, characterized in that, include: Flexible screen, sliding mechanism, screen support plate and lifting mechanism; The lifting mechanism includes two planar cam plates arranged opposite each other, wherein the planar cam plate located above is the upper cam plate and the planar cam plate located below is the lower cam plate. The upper cam plate can cooperate with the lower cam plate to make the lifting mechanism lift or lower. The sliding mechanism can drive the screen support plate to slide, so that the flexible display device has an unfolded state and a closed state; The flexible screen covers the screen support plate; When the flexible display device is in a closed state, the cams of the upper cam plate and the lower cam plate mesh with each other, and the lifting mechanism is in a low position and located below the screen support plate; When the flexible display device is in the unfolded state, the cam of the upper cam plate is lifted by the cam of the lower cam plate, the lifting mechanism is in the lifted state and is located on the same plane as the screen support plate, and the lifting mechanism cooperates with the screen support plate to support the flexible screen.

2. The apparatus according to claim 1, characterized in that: The sliding mechanism includes a fixed plate and a sliding plate; The fixed plate is symmetrically provided with first slide rails on both sides, and the first slide rails are parallel to the sliding direction of the flexible screen. The sliding plate has symmetrical sliding columns on both sides, which pass through the first slide rail and slidably connect the fixed plate and the sliding plate.

3. The apparatus according to claim 2, characterized in that: The lower cam plate is connected to a second slide rail on each side, and the second slide rail is shorter than the first slide rail. The sliding column passes through the second slide rail and slidably connects the lower cam plate and the sliding plate.

4. The apparatus according to claim 3, characterized in that, The first slide rail and / or the second slide rail are provided with elastic components, which cooperate with the sliding column to generate friction during the sliding process of the sliding plate.

5. The apparatus according to any one of claims 2-4, characterized in that: The sliding mechanism also includes two symmetrically arranged spring torsion mechanisms; One end of each of the spring torsion mechanisms is hinged to the fixed plate, and the other end is hinged to the sliding plate.

6. The apparatus according to any one of claims 1-4, characterized in that, The sliding mechanism includes a spring assembly disposed on the opening side of the flexible display device.

7. The apparatus according to any one of claims 2-4, characterized in that, Also includes: A synchronization mechanism, comprising two sets of symmetrically arranged conveyor belt structures; Each conveyor belt structure includes two rollers and a metal strip wound around the outside of the two rollers. The central axis of each roller is fixed and perpendicular to the sliding direction of the flexible screen.

8. The apparatus according to claim 7, characterized in that, The outer edge of each roller includes a plurality of uniform protrusions; The metal strip includes a plurality of holes, with the same spacing between every two holes; The arc length between every two protrusions on the outer edge of the roller is equal to the spacing of the metal strip.

9. The apparatus according to claim 7, characterized in that, The metal strip is rigidly connected to the sliding plate.

10. A mobile terminal, characterized in that, The device includes a frame and a flexible display device as described in any one of claims 1-9, wherein the frame has an accommodating space and the flexible display device is disposed in the accommodating space; the side wall of the frame has an opening for the flexible screen to unfold or close.

11. The mobile terminal according to claim 10, characterized in that, A spring is provided between the component of the frame and the upper cam plate. One end of the spring is fixedly connected to the component of the frame, and the other end of the spring is fixedly connected to the upper cam plate.

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