A folding display device

Abstract

The application relates to the technical field of display, and discloses a folding display device, which comprises a flexible display panel and a body back shell, at least one side of the body back shell is provided with the flexible display panel, one side of the flexible display panel is a display surface, the side of the flexible display panel, which is away from the display surface, is arranged towards the body back shell, the flexible display panel and the body back shell can be bent and folded, and the flexible display panel has a screen bending area; the folding display device further comprises a magnetic control lifting platform structure, the magnetic control lifting platform structure is embedded in the body back shell, the magnetic control lifting platform structure is arranged in correspondence with the screen bending area, the magnetic control lifting platform structure is telescopically connected to the side, which is away from the display surface, of the screen bending area along the thickness direction of the flexible display panel, and the magnetic control lifting platform structure is configured to generate a variable magnetic field by changing the current size input thereto, so as to drive the magnetic control lifting platform structure to telescopically move along the thickness direction of the flexible display panel, thereby effectively improving the crease problem of the screen bending area.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a foldable display device. Background Technology

[0002] In recent years, with the development of display technology, portable terminals such as mobile phones and tablets have become extremely popular. However, as the size of display terminal products increases, these devices become less portable. With the rapid advancement of flexible screen technology, the form factors of display devices have become increasingly diverse. Among them, foldable display devices are an important development direction in the display field today due to their portability and display versatility.

[0003] Existing folding display devices are divided into two modes: inward folding and outward folding. Inward folding means that the display surfaces of the folding display device are folded together facing each other. In this mode, after folding, the display surfaces of the screen are stacked together opposite each other. Outward folding means that the display surfaces of the folding display device are folded together facing away from each other. In this mode, after folding, the display surfaces of the screen are opposite each other.

[0004] Because foldable displays have a certain thickness, whether they are inward-folding or outward-folding, the opposing sides of the foldable display are subjected to tensile or compressive stress during the folding process. This can easily cause creases to form on the surface of the foldable display. The creases become more obvious with each bend, which seriously affects the lifespan of the foldable display and the overall quality of the displayed image. Summary of the Invention

[0005] The purpose of this invention is to provide a foldable display device that solves the technical problem in the prior art where foldable display devices form creases when bent, affecting the display effect and service life.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This invention provides a foldable display device, comprising:

[0008] The device includes a flexible display panel and a back cover, wherein the flexible display panel is disposed on at least one side of the back cover, one side of the flexible display panel is a display surface, and the side of the flexible display panel facing away from the display surface faces the back cover. The flexible display panel and the back cover are bendable and foldable, and the flexible display panel has a screen bending area. The folding display device further includes:

[0009] A magnetically controlled lifting platform structure is embedded in the back shell of the machine body. The magnetically controlled lifting platform structure is correspondingly arranged with respect to the bending area of ​​the screen. The magnetically controlled lifting platform structure is telescopically connected to the side of the bending area of ​​the screen away from the display surface along the thickness direction of the flexible display panel. The magnetically controlled lifting platform structure is configured to generate a variable magnetic field by changing the magnitude of the current flowing through it, so as to drive the magnetically controlled lifting platform structure to extend and retract along the thickness direction of the flexible display panel.

[0010] The foldable display device has a magnetically controlled lifting platform structure embedded in the back shell of the device. The magnetically controlled lifting platform structure is set to correspond to the bending area of ​​the flexible display panel. The magnetically controlled lifting platform structure generates a variable magnetic field by changing the amount of current flowing through it, thereby driving the magnetically controlled lifting platform to extend and retract along the thickness direction of the flexible display panel. This allows the magnetically controlled lifting platform structure to be extended and retractably connected to the side of the bending area of ​​the screen away from the display surface along the thickness direction of the flexible display panel. This can effectively improve the crease problem in the bending area of ​​the screen, increase the service life of the foldable display device, and maintain a good display effect.

[0011] As a preferred embodiment of the aforementioned folding display device, the magnetically controlled lifting platform structure includes:

[0012] The magnetically controlled lifting platform body extends along the thickness direction of the flexible display panel and is connected to the flexible display panel. The magnetically controlled lifting platform body is made of rare earth super magnetostrictive material.

[0013] Magnetic coils are provided on both sides of the magnetically controlled lifting platform body. The magnetic coils are configured to generate a variable magnetic field by changing the magnitude of the current flowing into them, so as to drive the magnetically controlled lifting platform body to extend and retract along the thickness direction of the flexible display panel.

[0014] Optionally, the main body of the magnetically controlled lifting platform is a cylindrical structure with a diameter of R.

[0015] By changing the magnitude of the current flowing through the magnetic coil, a variable magnetic field is generated, thereby driving the magnetically controlled lifting platform body located within the magnetic field range to extend and retract along the thickness direction of the flexible display panel, so as to adjust the height of the magnetically controlled lifting platform body and eliminate creases through support or pulling force.

[0016] The main body of the magnetically controlled lifting platform is made of rare-earth super magnetostrictive material, which can generate a magnetostrictive effect with the change of magnetic field, thereby changing the height to adapt to different situations.

[0017] The main body of the magnetically controlled lifting platform is a cylindrical structure, which is simple and easy to manufacture; moreover, this structure facilitates the extension and retraction adjustment of the main body of the magnetically controlled lifting platform.

[0018] As a preferred embodiment of the aforementioned folding display device, the magnetically controlled lifting platform structure further includes:

[0019] An elastic sleeve is fitted around the circumference of the magnetically controlled lifting platform body and sandwiched between the magnetically controlled lifting platform body and the magnetic coil.

[0020] Optionally, the thickness of the elastic jacket is 0.01R to 0.02R, and the elastic jacket is made of rubber or silicone.

[0021] The elastic jacket is sandwiched between the magnetic lifting platform body and the magnetic coil to ensure that there are no gaps between the magnetic lifting platform body and the elastic jacket, and between the elastic jacket and the magnetic coil.

[0022] The thickness of the elastic jacket is 0.01R to 0.02R. This thickness setting avoids affecting the lifting and lowering of the magnetic lifting platform body.

[0023] Elastic jackets are made of rubber or silicone to provide elasticity. Elastic jackets made of rubber or silicone have good elasticity and are inexpensive.

[0024] As a preferred embodiment of the aforementioned folding display device, the magnetically controlled lifting platform structure further includes:

[0025] A buffer plate, which is elastic, is disposed on the end face of the magnetically controlled lifting platform body facing the flexible display panel. The magnetically controlled lifting platform body is connected to the flexible display panel through the buffer plate.

[0026] Optionally, the buffer disk has a diameter of R and a thickness of 0.1R to 0.2R, and the buffer disk is made of a corrosion-resistant organic flexible composite material.

[0027] The buffer plate allows the magnetic lifting platform to cushion the force exerted on the flexible display panel, thus protecting it. Furthermore, the magnetic lifting platform is connected to the flexible display panel via the buffer plate, and the lifting of the magnetic lifting platform moves the flexible display panel's screen bending area through the buffer plate, thereby eliminating creases regardless of whether the folding display device is folded inward or outward.

[0028] The buffer disk has a diameter of R and a thickness of 0.1R to 0.2R. This structure can provide good protection for the flexible display panel.

[0029] The buffer disc is made of corrosion-resistant organic flexible composite material, which has a long service life.

[0030] As a preferred embodiment of the aforementioned folding display device, a protective cover is provided on the outside of the magnetic coil, and the protective cover is a rigid structure.

[0031] The rigid protective cover can protect and fix the magnetic coil.

[0032] As a preferred embodiment of the aforementioned folding display device, the magnetically controlled lifting platform structure further includes:

[0033] A pressure detection component assembly, comprising pressure detection elements disposed on opposite sides of the magnetic coils, with each set of flexible display panels corresponding to one set of the pressure detection components.

[0034] The pressure detection component can monitor the pressure changes of the magnetic lifting platform structure during the opening and closing of the flexible display panel, and adjust the current supplied to the magnetic coil accordingly to adjust the height of the magnetic lifting platform body, thereby adapting to different folding degrees of the flexible display panel.

[0035] As a preferred embodiment of the above-mentioned folding display device, a protective fixing layer is provided on the outer side of the magnetically controlled lifting platform structure, and an avoidance opening is provided in the area of ​​the protective fixing layer corresponding to the end face of the flexible display panel connected to the magnetically controlled lifting platform body.

[0036] The protective fixing layer can protect and fix the structure of the magnetic lifting platform, and the avoidance opening can avoid interference with the lifting of the main body of the magnetic lifting platform.

[0037] As a preferred embodiment of the above-mentioned folding display device, a set of flexible display panels is provided, and the back shell of the body is provided on the side of the flexible display panel that is away from the display surface;

[0038] Alternatively, two sets of flexible display panels may be provided, with the flexible display panels provided on both the upper and lower surfaces of the back shell of the machine body.

[0039] One set of flexible display panels is provided, with the back shell of the device located on the side of the flexible display panel away from the display surface. This folding display device has a simple structure and low cost, and displays through the display surface of the flexible display panel. Alternatively, two sets of flexible display panels can be provided, with flexible display panels on both the upper and lower surfaces of the back shell of the device. This folding display device can achieve double-sided display, enhancing the user experience.

[0040] As a preferred embodiment of the aforementioned folding display device, the magnetically controlled lifting platform structure further includes a fixed base;

[0041] When a set of flexible display panels is provided, the fixed base is located at the end of the magnetically controlled lifting platform body that is away from the flexible display panels;

[0042] When two sets of the flexible display panels are provided, the fixed base is located in the middle of the main body of the magnetically controlled lifting platform.

[0043] When a set of flexible display panels is set, the fixed base is set at the end of the magnetic lifting platform body that is away from the flexible display panel. The end of the magnetic lifting platform body facing the flexible display panel can be raised and lowered to prevent the end of the magnetic lifting platform body that is away from the flexible display panel from moving downward during operation.

[0044] When two sets of flexible display panels are set, the fixed base is set in the middle of the magnetic lifting platform body, so that both ends of the magnetic lifting platform body can be raised and lowered to support and eliminate the creases of the corresponding flexible display panels.

[0045] As a preferred embodiment of the above-mentioned folding display device, the fixing base is a rigid circular pad with a diameter greater than R and a thickness of 0.3R to 0.5R.

[0046] Optionally, the diameter of the fixed base is 1.2R.

[0047] The aforementioned fixed base can effectively limit the position of the magnetically controlled lifting platform, and its structure is simple and easy to manufacture.

[0048] The beneficial effects of this invention are:

[0049] The folding display device proposed in this invention has a magnetically controlled lifting platform structure embedded in the back shell of the device. The magnetically controlled lifting platform structure is correspondingly arranged with the screen bending area of ​​the flexible display panel. The magnetically controlled lifting platform structure generates a variable magnetic field by changing the magnitude of the current flowing through it, thereby driving the magnetically controlled lifting platform to extend and retract along the thickness direction of the flexible display panel. This allows the magnetically controlled lifting platform structure to be extended and retractably connected to the side of the screen bending area away from the display surface along the thickness direction of the flexible display panel, which can effectively improve the crease problem in the screen bending area, increase the service life of the folding display device, and maintain a good display effect. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the structure of the folding display device provided in Embodiment 1 of the present invention;

[0051] Figure 2 This is a schematic diagram of the magnetically controlled lifting platform structure provided in Embodiment 1 of the present invention;

[0052] Figure 3 This is a schematic diagram of the foldable display device provided in Embodiment 1 of the present invention when folded;

[0053] Figure 4 This is a schematic diagram of the unfolding process of the folding display device provided in Embodiment 1 of the present invention;

[0054] Figure 5This is a schematic diagram of the unfolded structure of the folding display device provided in Embodiment 1 of the present invention;

[0055] Figure 6 This is a schematic diagram of the magnetically controlled lifting platform structure provided in Embodiment 2 of the present invention;

[0056] Figure 7 This is a schematic diagram of the foldable display device provided in Embodiment 2 of the present invention when folded;

[0057] Figure 8 yes Figure 7 Enlarged view of point A in the middle;

[0058] Figure 9 This is a schematic diagram of the structure of the folding display device provided in Embodiment 2 of the present invention when folded in reverse;

[0059] Figure 10 This is a schematic diagram of the unfolded structure of the folding display device provided in Embodiment 2 of the present invention.

[0060] In the picture:

[0061] 1. Flexible display panel; 11. Display surface; 12. Screen bending area;

[0062] 2. Back shell of the fuselage;

[0063] 3. Magnetic control lifting platform structure; 31. Magnetic control lifting platform body; 32. Magnetic coil; 33. Elastic outer jacket; 34. Buffer plate; 35. Protective cover; 36. Pressure detection element; 37. Protective fixing layer; 37. Clearance opening; 38. Fixed base. Detailed Implementation

[0064] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0065] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0066] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0067] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0068] Example 1:

[0069] Existing folding display devices are divided into two modes: inward folding and outward folding. Inward folding means that the display surfaces of the folding display device are folded together facing each other. In this mode, after folding, the display surfaces of the screen are stacked together opposite each other. Outward folding means that the display surfaces of the folding display device are folded together facing away from each other. In this mode, after folding, the display surfaces of the screen are opposite each other.

[0070] Because foldable displays have a certain thickness, whether they are inward-folding or outward-folding, the opposing sides of the foldable display are subjected to tensile or compressive stress during the folding process. This can easily cause creases to form on the surface of the foldable display. The creases become more obvious with each bend, which seriously affects the lifespan of the foldable display and the overall quality of the displayed image.

[0071] To solve the above problems, such as Figure 1As shown, this embodiment provides a foldable display device, including a flexible display panel 1 and a back shell 2. The flexible display panel 1 is disposed on at least one side of the back shell 2. One side of the flexible display panel 1 is a display surface 11, and the side of the flexible display panel 1 opposite to the display surface 11 is a non-display surface. The display surface 11 refers to the surface of the flexible display panel 1 that emits light and displays the image when it is in use. The side of the flexible display panel 1 facing away from the display surface 11 faces the back shell 2, that is, the non-display surface of the flexible display panel 1 faces the back shell 2. The flexible display panel 1 and the back shell 2 can be bent and folded. The flexible display panel 1 has a screen bending area 12. The screen bending area 12, as the bending position of the flexible display panel 1, is the part most prone to creases. When the flexible display panel 1 is subjected to a certain folding compressive stress, the screen bending area 12 is subjected to a certain compressive stress, causing creases to appear in this area. These creases are not only visible when the flexible display panel 1 is in normal display mode, but also affect the user experience. However, this can also easily lead to broken wiring and film peeling on the flexible display panel 1. Therefore, the folding display device also includes a magnetic lifting platform structure 3, which is embedded in the back shell 2 of the device. The magnetic lifting platform structure 3 is correspondingly set to the screen bending area 12. The magnetic lifting platform structure 3 is telescopically connected to the side of the screen bending area 12 away from the display surface 11 along the thickness direction of the flexible display panel 1. The magnetic lifting platform structure 3 is configured to generate a variable magnetic field by changing the magnitude of the current flowing into it, so as to drive the magnetic lifting platform structure 3 to extend and retract along the thickness direction of the flexible display panel 1.

[0072] The magnetic lifting platform structure 3 of the folding display device generates a variable magnetic field by changing the magnitude of the current flowing through it, thereby driving the magnetic lifting platform to extend and retract along the thickness direction of the flexible display panel 1. This allows the magnetic lifting platform structure 3 to be scalably connected to the side of the screen bending area 12 away from the display surface 11 along the thickness direction of the flexible display panel 1. When a crease appears on the flexible display panel 1, the magnetic lifting platform structure 3 can be in an extended state when the folding display device is unfolded. At this time, part of the crease in the screen bending area 12 of the flexible display panel 1 will be lifted by the magnetic lifting platform structure 3. When normally displayed in the unfolded state, the crease will not be visually noticeable, effectively improving the crease problem in the screen bending area 12, increasing the service life of the folding display device, maintaining good display effects, and enhancing the user experience.

[0073] It should be noted that the folding display device has a flattened state and a folded state. The flattened state can be understood as the back shell 2 of the device being laid out flat, with the back shell 2 basically on the same plane. At this time, the flexible display panel 1 is in the flattened state along with the back shell 2. The folded state can be understood as the back shell 2 being folded along a certain bending axis. At this time, the two ends of the back shell 2 are close to each other, and the flexible display panel 1 is in the folded state along with the back shell 2. This application only describes the state of the foldable display device, i.e., its appearance, and does not limit the display state of the foldable display device. In other words, it does not limit the relationship between the display state of the flexible display panel 1 and the folded or unfolded state of the foldable display device. To put it another way, whether the flexible display panel 1 is in a display state or a non-display state when the foldable display device is in a folded or unfolded state is not limited in this invention. Foldable display devices can reduce the number of terminals, lower the cost of various display sizes, and solve the problems of traditional terminals being numerous, costly, inconvenient to carry, and having sizes that are too large or too small in practical applications. Therefore, when the flexible display screen is in a display state can be set according to actual needs. For example, it can be set that the flexible display panel 1 is in a display state when the foldable display device is in a unfolded state, and in a non-display state when the foldable display device is in a folded state. Controlling the display state of the flexible display screen with the folding and unfolding states of the foldable display device allows for more convenient operation and eliminates the need for an unlock button on the foldable display device, improving the user experience.

[0074] Specifically, such as Figure 2 As shown, the magnetically controlled lifting platform structure 3 includes a magnetically controlled lifting platform body 31 and magnetic coils 32. The magnetically controlled lifting platform body 31 extends along the thickness direction of the flexible display panel 1 and is connected to the flexible display panel 1. Magnetic coils 32 are provided on both sides of the magnetically controlled lifting platform body 31. The magnetic coils 32 are configured to generate a variable magnetic field by changing the magnitude of the current flowing through them, thereby driving the magnetically controlled lifting platform body 31 to extend and retract along the thickness direction of the flexible display panel 1. By changing the magnitude of the current flowing through the magnetic coils 32 to generate a variable magnetic field, the magnetically controlled lifting platform body 31 located within the magnetic field range is driven to extend and retract along the thickness direction of the flexible display panel 1, thereby adjusting the height of the magnetically controlled lifting platform body 31.

[0075] Optionally, the main body 31 of the magnetically controlled lifting platform is made of rare-earth super magnetostrictive material. When the current flowing through the magnetic coil 32 changes, the magnetic coil 32 can generate a variable magnetic field. The rare-earth super magnetostrictive material generates a magnetostrictive effect in the variable magnetic field, and can change its height according to the change of the magnetic field to adapt to different degrees of creases. By utilizing the excellent magnetostrictive properties of rare-earth super magnetostrictive material, both miniaturization and crease problems can be effectively improved.

[0076] In this embodiment, the main body 31 of the magnetically controlled lifting platform is made of rare-earth super magnetostrictive material Terfenol-D (Tb-Dy-Fe alloy). In other embodiments, the main body 31 of the magnetically controlled lifting platform may also be made of other rare-earth super magnetostrictive materials.

[0077] Optionally, the main body 31 of the magnetically controlled lifting platform is a cylindrical structure with a diameter of R. The main body 31 is cylindrical and extends and retracts along its axial direction. This structure of the main body 31 is simple and easy to manufacture; moreover, this structure facilitates the extension and retraction adjustment of the main body 31.

[0078] In this embodiment, the magnetic coil 32 is a tightly wound coil with the wires tightly wound together, used for electromagnetic induction to generate an induced magnetic field, driving the longitudinal extension and retraction of the magnetically controlled lifting platform body 31. Figure 2 (Height direction). When the current flowing through the magnetic coil 32 changes, the magnetic coil 32 can generate a variable magnetic field to adjust the longitudinal height of the magnetically controlled lifting platform body 31 (it should be noted that, since other directions are restricted, the telescopic adjustment is only performed in the height direction of the magnetically controlled lifting platform body 31).

[0079] Optionally, the magnetically controlled lifting platform structure 3 also includes an elastic sleeve 33, which is fitted around the circumference of the magnetically controlled lifting platform body 31 and sandwiched between the magnetically controlled lifting platform body 31 and the magnetic coil 32, so as to ensure that there are no gaps between the magnetically controlled lifting platform body 31 and the elastic sleeve 33, and between the elastic sleeve 33 and the magnetic coil 32, so as to avoid affecting the formation of the magnetic field.

[0080] Optionally, the thickness of the elastic jacket 33 is 0.01R to 0.02R. This thickness setting avoids affecting the lifting and lowering of the magnetic lifting platform body 31. The elastic jacket 33 is made of rubber or silicone to be elastic. The elastic jacket 33 made of rubber or silicone has good elasticity and low cost.

[0081] Optionally, the magnetically controlled lifting platform structure 3 also includes a buffer plate 34. The buffer plate 34 is elastic and is disposed on the end face of the magnetically controlled lifting platform body 31 facing the flexible display panel 1. The magnetically controlled lifting platform body 31 is connected to the flexible display panel 1 through the buffer plate 34. The buffer plate 34 can buffer the force exerted by the magnetically controlled lifting platform body 31 on the flexible display panel 1, thus protecting the flexible display panel 1. Moreover, the magnetically controlled lifting platform body 31 is connected to the flexible display panel 1 through the buffer plate 34. The lifting and lowering of the magnetically controlled lifting platform body 31 drives the screen bending area 12 of the flexible display panel 1 to rise and fall through the buffer plate 34, thereby eliminating creases regardless of whether the folding display device is folded inward or outward.

[0082] Optionally, the diameter of the buffer disk 34 is R and the thickness is 0.1R to 0.2R. This structure can provide good protection for the flexible display panel 1.

[0083] Optionally, the buffer disc 34 is made of a corrosion-resistant organic flexible composite material with a long service life.

[0084] In this embodiment, as Figure 2 As shown, the top of the buffer disk 34 is bonded to its corresponding screen bending area 12. In this embodiment, the top of the buffer disk 34 and its corresponding screen bending area 12 are bonded using silicone rubber or instant adhesive, resulting in a relatively strong bond. The buffer disk 34 can also be bonded to the magnetic lifting platform body 31, thus firmly connecting the buffer disk 34 to the magnetic lifting platform body 31. For example, silicone rubber or instant adhesive can also be used for bonding. In other embodiments, the connection between the buffer disk 34 and the screen bending area 12, and the connection between the buffer disk 34 and the magnetic lifting platform body 31, are not limited to bonding; other connection methods can also be used, which are not specifically limited here.

[0085] In this embodiment, the buffer disk 34 is a polymer of rubber, ethylene-vinyl acetate copolymer (EVA), and polyurethane (PU) in a certain proportion. This polymer has good elasticity and can play a good cushioning role. The specific proportion is prior art and will not be described in detail here. In other embodiments, the buffer disk 34 is not limited to the above materials and can also be made of other elastic materials, as long as it can play a cushioning role.

[0086] Optionally, a protective cover 35 is provided on the outside of the magnetic coil 32. The protective cover 35 is a rigid structure. The rigid protective cover 35 covers the outside of the magnetic coil 32 and can protect and fix the magnetic coil 32 to prevent the magnetic coil 32 from deforming.

[0087] Optionally, the magnetic lifting platform structure 3 also includes a pressure detection component. The pressure detection component includes pressure detection elements 36 disposed on opposite sides of the magnetic coils 32. Each set of flexible display panels 1 is provided with a corresponding set of pressure detection components. The pressure detection component can monitor the pressure changes of the magnetic lifting platform structure 3 during the opening and closing of the flexible display panels 1, and accordingly adjust the current supplied to the magnetic coils 32 to adjust the height of the magnetic lifting platform body 31, thereby adapting to different folding degrees of the flexible display panels 1.

[0088] In this embodiment, the pressure detection element 36 is a pressure sensor, which has a simple structure and is easy to obtain. The pressure sensor is electrically connected to the control device of the folding display device. The pressure sensor is used to dynamically monitor the pressure inside the magnetic lifting platform structure 3. According to the pressure change signal, the current flowing through the magnetic coil 32 is adjusted in real time to change the magnitude of the external magnetic field, thereby enabling the magnetic lifting platform body 31 to be raised and lowered in a timely manner, thus eliminating creases.

[0089] Preferably, the magnetically controlled lifting platform structure 3 can be equipped with multiple sets of pressure detection components to perform multi-point detection, so as to avoid the situation where one of the pressure detection components cannot perform normal detection due to damage.

[0090] Optionally, a protective fixing layer 37 is provided on the outer side of the magnetically controlled lifting platform structure 3. An avoidance opening 371 is provided in the area of ​​the protective fixing layer 37 corresponding to the end face of the flexible display panel 1 connecting to the magnetically controlled lifting platform body 31. The protective fixing layer 37 protects and fixes the magnetically controlled lifting platform structure 3, allowing the magnetically controlled lifting platform body 31 to extend and retract only along its axial direction. The avoidance opening 371 prevents interference with the lifting and lowering of the magnetically controlled lifting platform body 31.

[0091] Furthermore, the shape of the clearance opening 371 is the same as that of the magnetically controlled lifting platform body 31, and the size of the clearance opening 371 is slightly larger than that of the magnetically controlled lifting platform body 31. This avoids interference with the lifting and lowering of the magnetically controlled lifting platform body 31 and can also guide the lifting and lowering movement of the magnetically controlled lifting platform body 31, preventing the magnetically controlled lifting platform body 31 from tilting or bending.

[0092] Optionally, such as Figure 1 As shown, a set of flexible display panels 1 are provided, and the back shell 2 of the body is provided on the side of the flexible display panel 1 that is away from the display surface 11. That is, the back shell 2 of the body is provided on the non-display surface of the flexible display panel 1. This folding display device is a single-sided screen with a simple structure and low cost. It displays through the display surface 11 of the flexible display panel 1.

[0093] Low options are available, such as Figure 3As shown, the magnetic lifting platform structure 3 also includes a fixed base 38. When a set of flexible display panels 1 are provided, the fixed base 38 is provided at the end of the magnetic lifting platform body 31 that is away from the flexible display panel 1. That is, the fixed base 38 is provided at the bottom end of the magnetic lifting platform body 31. The end of the magnetic lifting platform body 31 facing the flexible display panel 1 can be raised and lowered to prevent the end of the magnetic lifting platform body 31 that is away from the flexible display panel 1 from moving downward during operation. That is, only the end of the magnetic lifting platform body 31 facing the flexible display panel 1 can be raised and lowered.

[0094] Optionally, the fixed base 38 is a rigid circular pad with a diameter greater than R. In this embodiment, the diameter of the fixed base 38 is 1.2R and the thickness is 0.3R to 0.5R. In this embodiment, the axes of the magnetically controlled lifting platform body 31 and the fixed base 38 are on a straight line so that the bottom surface of the magnetically controlled lifting platform body 31 can completely fall into the range of the fixed base 38. The fixed base 38 provides good support for the magnetically controlled lifting platform body 31. The fixed base 38 can provide good limiting for the magnetically controlled lifting platform body 31 and has a simple structure that is easy to manufacture.

[0095] like Figures 3-5 As shown, as the flexible display panel 1 unfolds, the pressure sensor receives a signal indicating continuously increasing pressure. This signal is converted (this is prior art and will not be elaborated here) to cause the folding display device to provide a correspondingly increasing current to the magnetic coil 32. This causes the electromagnetic coil 32 to induce an external magnetic field, the magnitude of which also gradually increases. The magnetically controlled lifting platform body 31, with a diameter of R, experiences a supermagnetic-strictive effect in the changing external magnetic field, elongating vertically upwards (the fixed base 38 is fixedly installed at the bottom of the magnetically controlled lifting platform body 31, preventing it from moving downwards). This keeps the buffer plate 34 in close contact with the screen bending area 12 and continuously lifts it until the flexible display panel 1 is flattened. At this point, the indentation in the screen bending area 12 disappears, effectively improving the crease.

[0096] As the screen unfolds and gradually folds, the pressure sensor receives a signal opposite to the previous one, the magnitude of the external magnetic field gradually decreases, and the magnetically controlled lifting platform 31 descends, allowing the flexible display panel 1 to fold normally.

[0097] It should be noted that when the folding display device is folded inward, the magnetic lifting platform body 31 extends to eliminate the indentation of the screen bending area 12 during the folding and gradually unfolding process; when the folding display device is folded outward, the magnetic lifting platform body 31 shortens to pull the protrusion of the screen bending area 12 back during the folding and gradually unfolding process, thereby eliminating the crease.

[0098] The foldable display device includes, but is not limited to, the following categories: televisions, laptops, computers, desktop monitors, tablets, digital cameras, mobile phones, smart bracelets, smart glasses, in-vehicle displays, medical devices, industrial control equipment, touch interactive terminals, etc.

[0099] The magnetic lifting platform structure 3 of the folding display device generates a variable magnetic field by changing the magnitude of the current flowing through it, thereby driving the magnetic lifting platform to extend and retract along the thickness direction of the flexible display panel 1. This allows the magnetic lifting platform structure 3 to be scalably connected to the side of the screen bending area 12 away from the display surface 11 along the thickness direction of the flexible display panel 1. When a crease appears on the flexible display panel 1, the magnetic lifting platform structure 3 can be in an extended state when the folding display device is unfolded. At this time, part of the crease in the screen bending area 12 of the flexible display panel 1 will be lifted by the magnetic lifting platform structure 3. When normally displayed in the unfolded state, the crease will not be visually noticeable, effectively improving the crease problem in the screen bending area 12, increasing the service life of the folding display device, maintaining good display effects, and enhancing the user experience.

[0100] Example 2:

[0101] like Figures 6-10 As shown, this embodiment provides a foldable display device, including a flexible display panel 1 and a back shell 2. Flexible display panels 1 are disposed on both the upper and lower surfaces of the back shell 2. One side of the flexible display panel 1 is a display surface 11, and the side opposite to the display surface 11 is a non-display surface. The display surface 11 refers to the side of the flexible display panel 1 that emits light and displays the image when it is in use. Flexible display panels 1 are disposed on both the upper and lower surfaces of the back shell 2. The non-display surfaces of the two sets of flexible display panels 1 face the back shell 2 and are connected to it. This foldable display device is a double-sided screen, enabling dual-sided display and enhancing the user experience.

[0102] The flexible display panel 1 and the back cover 2 are bendable and foldable. The flexible display panel 1 has a screen bending area 12. The screen bending area 12 is the bending position of the flexible display panel 1, which is also the part most prone to creases. When the flexible display panel 1 is subjected to a certain folding compressive stress, the screen bending area 12 is subjected to a certain compressive stress, causing creases to appear in this area. The creases are not only visible when the flexible display panel 1 is in normal display, affecting the user experience, but also easily lead to broken wiring and film peeling of the flexible display panel 1. Therefore... To eliminate the creases in the screen bending area 12, the folding display device also includes a magnetically controlled lifting platform structure 3. The magnetically controlled lifting platform structure 3 is embedded in the back shell 2 of the device body and is correspondingly arranged with the screen bending area 12. The magnetically controlled lifting platform structure 3 is telescopically connected to the side of the screen bending area 12 away from the display surface 11 along the thickness direction of the flexible display panel 1. The magnetically controlled lifting platform structure 3 is configured to generate a variable magnetic field by changing the magnitude of the current flowing through it, so as to drive the magnetically controlled lifting platform structure 3 to telescopically extend and retract along the thickness direction of the flexible display panel 1.

[0103] The magnetic lifting platform structure 3 of the folding display device generates a variable magnetic field by changing the magnitude of the current flowing through it, thereby driving the magnetic lifting platform to extend and retract along the thickness direction of the flexible display panel 1. This allows the magnetic lifting platform structure 3 to be telescopically connected to the side of the screen bending area 12 away from the display surface 11 along the thickness direction of the flexible display panel 1. When a crease appears on the flexible display panel 1, the magnetic lifting platform structure 3 can extend and pull or support the screen bending area 12, thereby effectively improving the crease problem of the screen bending area 12, increasing the service life of the folding display device, maintaining a good display effect, and enhancing the user experience.

[0104] The difference between this embodiment and embodiment one is that embodiment one sets one set of flexible display panels, while this embodiment sets two sets of flexible display panels 1, and the specific structure of the magnetically controlled lifting platform structure 3 is slightly different.

[0105] Specifically, such as Figures 6-10 As shown, in this embodiment, two sets of flexible display panels 1 are provided. Flexible display panels 1 are provided on both the upper and lower surfaces of the back shell 2 of the body. The non-display surfaces of the two sets of flexible display panels 1 are facing the back shell 2 of the body and are connected to the back shell 2 of the body. This folding display device is a double-sided screen, which can realize double-sided display and enhance the user experience.

[0106] When folded, the double-sided screen can be folded in two directions, allowing either flexible display panel 1 to fold inwards or outwards. At this time, the magnetically controlled lifting platform structure 3 can pull or support the flexible display panel 1 to eliminate creases.

[0107] Specifically, such as Figure 6As shown, the magnetically controlled lifting platform structure 3 includes a magnetically controlled lifting platform body 31 and magnetic coils 32. The magnetically controlled lifting platform body 31 extends along the thickness direction of the flexible display panel 1 and is connected to the flexible display panel 1. Magnetic coils 32 are provided on both sides of the magnetically controlled lifting platform body 31. The magnetic coils 32 are configured to generate a variable magnetic field by changing the magnitude of the current flowing through them, thereby driving the magnetically controlled lifting platform body 31 to extend and retract along the thickness direction of the flexible display panel 1. By changing the magnitude of the current flowing through the magnetic coils 32 to generate a variable magnetic field, the magnetically controlled lifting platform body 31 located within the magnetic field range is driven to extend and retract along the thickness direction of the flexible display panel 1, thereby adjusting the height of the magnetically controlled lifting platform body 31.

[0108] Furthermore, a protective cover 35 is provided on the outside of the magnetic coil 32. The protective cover 35 is a rigid structure. The rigid protective cover 35 covers the outside of the magnetic coil 32 and can protect and fix the magnetic coil 32 to prevent the magnetic coil 32 from deforming.

[0109] Optionally, the magnetically controlled lifting platform structure 3 also includes an elastic sleeve 33, which is fitted around the circumference of the magnetically controlled lifting platform body 31 and sandwiched between the magnetically controlled lifting platform body 31 and the magnetic coil 32, so as to ensure that there are no gaps between the magnetically controlled lifting platform body 31 and the elastic sleeve 33, and between the elastic sleeve 33 and the magnetic coil 32, so as to avoid affecting the formation of the magnetic field.

[0110] Optionally, a protective fixing layer 37 is provided on the outer side of the magnetic lifting platform structure 3, and an avoidance opening 371 is provided in the area of ​​the protective fixing layer 37 corresponding to the end face of the flexible display panel 1 that connects to the magnetic lifting platform body 31.

[0111] Optionally, the magnetic lifting platform structure 3 also includes a fixed base 38, which is located in the middle of the magnetic lifting platform body 31. The fixed base 38 divides the magnetic lifting platform body 31 into two groups, so that the ends of the two magnetic lifting platform bodies 31 that are far from each other can be raised and lowered to eliminate the creases of the corresponding flexible display panel 1.

[0112] Furthermore, each of the two sets of magnetically controlled lifting platform bodies 31 is provided with a buffer plate 34 at the end furthest from each other. The buffer plate 34 can buffer the corresponding flexible display panel 1 to avoid damage to the flexible display panel 1.

[0113] like Figure 6 As shown, the magnetic lifting platform structure 3 also includes a pressure detection component. When the folding display device is a double-sided screen, two sets of pressure detection components are set. The two sets of pressure detection components are respectively set on the upper and lower sides of the fixed base 38 to detect the pressure independently, thereby reflecting the degree of crease of the two sets of flexible display panels 1.

[0114] like Figures 7-10 As shown, the double-sided screen is composed of Figure 7 or Figure 9 The folded state to Figure 10 During the unfolding process, the two sets of pressure sensors receive signals of pressure changes, convert the signals to provide corresponding changes in current to the corresponding magnetic coils 32, and induce an external magnetic field in the electromagnetic coils 32, the magnitude of which also gradually changes. The two sets of magnetically controlled lifting platform bodies 31 generate a supermagnetic-strictive effect, elongating or shortening longitudinally, causing displacement of the adhered and bonded screen bending area 12, so that the concave or convex areas of the screen bending area 12 are supported and lifted by a force F1 or pulled back and restored by a force F2 (e.g., Figure 8 This is used to improve the crease problem when the object is flattened.

[0115] It should be noted that the magnetic lifting platform structure 3 can be customized according to the inward and outward folding method of the flexible display panel 1 and the size of the flexible display panel 1 to eliminate the creases in the screen bending area 12.

[0116] The other structures of the folding display device in this embodiment are the same as those in Embodiment 1, and will not be described again here.

[0117] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A foldable display device, characterized in that, include: A flexible display panel (1) and a back shell (2) are provided on at least one side of the back shell (2). One side of the flexible display panel (1) is a display surface (11). The side of the flexible display panel (1) facing away from the display surface (11) is disposed towards the back shell (2). The flexible display panel (1) and the back shell (2) are bendable and foldable. The flexible display panel (1) has a screen bending area (12). The foldable display device further includes: A magnetically controlled lifting platform structure (3) is embedded in the back shell (2) of the machine body. The magnetically controlled lifting platform structure (3) is correspondingly arranged with the screen bending area (12). The magnetically controlled lifting platform structure (3) is telescopically connected to the side of the screen bending area (12) away from the display surface (11) along the thickness direction of the flexible display panel (1). The magnetically controlled lifting platform structure (3) is configured to generate a variable magnetic field by changing the magnitude of the current passed into it, so as to drive the magnetically controlled lifting platform structure (3) to extend and retract along the thickness direction of the flexible display panel (1).

2. The folding display device according to claim 1, characterized in that, The magnetically controlled lifting platform structure (3) includes: The magnetically controlled lifting platform body (31) extends along the thickness direction of the flexible display panel (1), and is connected to the flexible display panel (1). The magnetically controlled lifting platform body (31) is made of rare earth super magnetostrictive material. Magnetic coil (32) is provided on both sides of the magnetically controlled lifting platform body (31). The magnetic coil (32) is configured to generate a variable magnetic field by changing the magnitude of the current flowing into it, so as to drive the magnetically controlled lifting platform body (31) to extend and retract along the thickness direction of the flexible display panel (1). Optionally, the main body (31) of the magnetically controlled lifting platform is a cylindrical structure with a diameter of R.

3. The folding display device according to claim 2, characterized in that, The magnetically controlled lifting platform structure (3) also includes: An elastic sleeve (33) is fitted around the circumference of the magnetically controlled lifting platform body (31) and is sandwiched between the magnetically controlled lifting platform body (31) and the magnetic coil (32). Optionally, the thickness of the elastic jacket (33) is 0.01R to 0.02R, and the elastic jacket (33) is made of rubber or silicone.

4. The folding display device according to claim 2, characterized in that, The magnetically controlled lifting platform structure (3) also includes: A buffer plate (34) is provided, the buffer plate (34) is elastic, the buffer plate (34) is provided on the end face of the magnetic lifting platform body (31) facing the flexible display panel (1), and the magnetic lifting platform body (31) is connected to the flexible display panel (1) through the buffer plate (34); Optionally, the buffer disk (34) has a diameter of R and a thickness of 0.1R to 0.2R, and the buffer disk (34) is made of a corrosion-resistant organic flexible composite material.

5. The folding display device according to claim 2, characterized in that, A protective cover (35) is provided on the outside of the magnetic coil (32), and the protective cover (35) is a rigid structure.

6. The folding display device according to claim 2, characterized in that, The magnetically controlled lifting platform structure (3) also includes: The pressure detection assembly includes pressure detection elements (36) disposed on opposite sides of the magnetic coil (32), and each set of the flexible display panels (1) is provided with a set of the pressure detection assemblies.

7. The folding display device according to claim 2, characterized in that, The outer side of the magnetic lifting platform structure (3) is covered with a protective fixing layer (37), and the area of ​​the protective fixing layer (37) corresponding to the end face of the magnetic lifting platform body (31) that connects to the flexible display panel (1) is provided with a clearance opening (371).

8. The folding display device according to claim 2, characterized in that, The flexible display panel (1) is provided in a set, and the back shell (2) of the body is provided on the side of the flexible display panel (1) that is away from the display surface (11); Alternatively, two sets of flexible display panels (1) may be provided, with the flexible display panels (1) provided on both the upper and lower surfaces of the back shell (2) of the body.

9. The folding display device according to claim 2, characterized in that, The magnetically controlled lifting platform structure (3) also includes a fixed base (38); When a set of flexible display panels (1) are provided, the fixed base (38) is provided at one end of the magnetic lifting platform body (31) away from the flexible display panel (1); When two sets of the flexible display panel (1) are provided, the fixed base (38) is located in the middle of the magnetically controlled lifting platform body (31).

10. The folding display device according to claim 9, characterized in that, The fixing base (38) is a rigid circular gasket, the diameter of the fixing base (38) is greater than R, and the thickness is 0.3R to 0.5R; Optionally, the diameter of the fixed base (38) is 1.2R.

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