Flexible display device

Abstract

The embodiment of the present application provides a flexible display device, comprising: a winding shaft and a flexible display panel, the flexible display panel is wound on the winding shaft, the flexible display panel comprises a spacer layer, a support layer and a flexible display layer arranged in sequence along the thickness direction thereof; the spacer layer comprises at least one isolation component, the isolation component comprises a plurality of isolation blocks arranged on the side of the support layer away from the flexible display layer, the isolation block has opposite first bottom surface, second bottom surface along the thickness direction of the flexible display panel and the connecting surface between the two, the first bottom surface is connected with the support layer; the included angle θ between the first bottom surface and the connecting surface satisfies: 0°<θ<90°, and the included angle θ of the plurality of isolation blocks gradually increases from the fixed side of the flexible display panel to the opposite side of the fixed side. According to the embodiment of the present application, the isolation block can effectively disperse the contact stress of different curvature regions during winding, and further avoid the abrasion of the flexible display panel during winding.

Description

Technical Field

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

[0002] In the field of display technology, flexible display devices are widely used in various fields requiring flexible displays due to their rollable nature. In a flexible display device, one end of the flexible display panel is fixed to a roll-up shaft, while the other end of the flexible display panel can rotate relative to the roll-up shaft, so that the flexible display panel is either rolled up on the roll-up shaft or flattened into a plane.

[0003] However, the inventors of this invention have discovered that during the rolling process of the flexible display device, friction occurs on the surface of the flexible display device, which may lead to damage to the flexible display device. Summary of the Invention

[0004] This application provides a flexible display device that can effectively avoid friction during the rolling process of the flexible display device.

[0005] This application provides a flexible display device, including:

[0006] Curved shaft;

[0007] A flexible display panel is wound around the winding shaft, which is used to drive the flexible display panel to switch between an unfolded state and a rolled state;

[0008] The flexible display panel includes a spacer layer, a support layer, and a flexible display layer arranged sequentially along its thickness direction;

[0009] The spacer layer includes at least one isolation component, which includes multiple isolation blocks disposed on the side of the support layer opposite to the flexible display layer. Each isolation block has a first bottom surface and a second bottom surface opposite to each other along the thickness direction of the flexible display panel, and a connecting surface connecting the first bottom surface and the second bottom surface. The first bottom surface is connected to the support layer. The included angle θ between the first bottom surface and the connecting surface is...

[0010] The following conditions must be met: 0° < θ < 90°, and the included angle θ of the plurality of isolation blocks gradually increases from the fixed side of the flexible display panel to the opposite side of the fixed side.

[0011] According to an embodiment of this application, the isolation component further includes a buffer portion extending along the thickness direction of the flexible display panel. The buffer portion is located on the side of the isolation component close to the support layer, and a plurality of isolation blocks are disposed on the side of the buffer portion away from the support layer.

[0012] According to any of the foregoing embodiments of this application, a plurality of the isolation blocks are arranged at intervals or adjacent to each other along the length direction of the flexible display panel.

[0013] According to any of the foregoing embodiments of this application, each of the aforementioned isolation blocks extends along the width direction of the flexible display panel.

[0014] According to any of the foregoing embodiments of this application, a plurality of the isolation blocks are arranged in multiple rows, each row of the isolation blocks is arranged along the length direction of the flexible display panel, and the multiple rows of the isolation blocks are arranged at intervals along the width direction of the flexible display panel.

[0015] According to any of the foregoing embodiments of this application, the material of the isolation block includes a flexible material;

[0016] In the unfolded state, there is a gap between two adjacent isolation blocks in the same isolation assembly; in the curled state, the connecting surfaces of two adjacent isolation blocks in the same isolation assembly are fitted together.

[0017] According to any of the foregoing embodiments of this application, the second bottom surface is arc-shaped, and the arc of the second bottom surface of the plurality of isolation blocks gradually decreases from the fixed side of the flexible display panel to the opposite side of the fixed side.

[0018] According to any of the foregoing embodiments of this application, the cross-section of the isolation block is an inverted trapezoid or a semi-circle.

[0019] According to any of the foregoing embodiments of this application, it further includes a frame and a drive motor, the drive motor is mounted on the frame, and the drive end of the drive motor is connected to the winding shaft; the outer wall of the winding shaft is provided with a stepped structure, the fixed side of the flexible display panel is fixed to the stepped structure, and the width of the stepped structure along the thickness direction of the flexible display panel is consistent with the thickness of the flexible display panel.

[0020] According to any of the foregoing embodiments of this application, the winding shaft has a first semicircular portion and a second semicircular portion, the diameters of the first semicircular portion and the second semicircular portion are different, and the straight edge segment of the first semicircular portion is connected to the straight edge segment of the second semicircular portion to form the stepped structure on the outer surface of the winding shaft.

[0021] According to any of the foregoing embodiments of this application, the isolation components are multiple, and the multiple isolation components are arranged at intervals along the length direction of the flexible display panel.

[0022] According to any of the foregoing embodiments of this application, from the fixed side of the flexible display panel to the opposite side of the fixed side, the dimensions of the plurality of isolation components gradually increase along the length direction of the flexible display panel; wherein, the dimension of the isolation component closest to the fixed side of the flexible display panel along the length direction of the flexible display panel is equal to the sum of the arc length of the first semicircle and the arc length of the second semicircle.

[0023] According to any of the foregoing embodiments of this application, the spacer layer is bonded to the side of the support layer opposite to the flexible display layer; or, the spacer layer and the support layer are an integral structure.

[0024] According to any of the foregoing embodiments of this application, the flexible display panel further includes a protective layer disposed on the side of the flexible display layer opposite to the support layer; in the curled state, a portion of the spacer layer contacts the outer wall of the curling shaft, and another portion contacts the protective layer.

[0025] In the flexible display device provided in this application, the flexible display device includes a roller and a flexible display panel wound on it. The roller drives the flexible display panel to switch between an unfolded state and a rolled state through a drive mechanism. The flexible display panel has a spacer layer, a support layer, and a flexible display layer stacked sequentially from the inside to the outside along its thickness direction. The spacer layer includes at least one isolation component coaxially arranged with a roll-up shaft. The isolation component includes multiple isolation blocks, each of which has a first bottom surface, a second bottom surface, and an inclined connecting surface perpendicular to the thickness direction of the flexible display panel. The first bottom surface is connected to the support layer, and the second bottom surface is arranged facing the outer circumferential surface of the roll-up shaft. The included angle θ between the first bottom surface and the connecting surface is defined as 0° < θ < 90°, and the included angle θ of the multiple isolation blocks gradually increases from the fixed side of the flexible display panel to the opposite side. This allows the second bottom surface of the isolation block to form a progressive line contact with the outer wall of the roll-up shaft and the adjacent flexible display layer during the roll-up process, effectively dispersing the contact stress in different curvature areas. This effectively prevents wear or stress concentration of the flexible display panel during roll-up or unfolding. The support layer never needs to contact the roll-up shaft or the flexible display layer, thus improving the performance of the flexible display device. Attached Figure Description

[0026] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, wherein the same or similar reference numerals denote the same or similar features.

[0027] Figure 1 This is a partial structural diagram of a flexible display device in its unfolded state, provided in an embodiment of this application.

[0028] Figure 2This is a partial structural diagram of a flexible display device in its unfolded state, provided in another embodiment of this application;

[0029] Figure 3 yes Figure 2 Sectional view along the BB direction;

[0030] Figure 4 This is a partial structural schematic diagram of a flexible display device in its unfolded state, according to another embodiment of this application.

[0031] Figure 5 This is a schematic diagram showing the connection between the support layer and the isolation block according to another embodiment of this application;

[0032] Figure 6 This is a schematic diagram showing the connection between the buffer section and the isolation block according to another embodiment of this application;

[0033] Figure 7 This is a schematic diagram showing the connection between the roller and the flexible display panel according to another embodiment of this application;

[0034] Figure 8 and Figure 7 A cross-sectional schematic diagram of the winding shaft in the corresponding embodiment.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Curved shaft; 11. Stepped structure; 12. First semicircular portion; 13. Second semicircular portion; 2. Flexible display panel; 21. Support layer; 22. Flexible display layer; 23. Spacer layer; 231. Isolation component; 2311. Isolation block; 2312. Buffer portion; 2313. First bottom surface; 2314. Second bottom surface; 2315. Connecting surface; 24. Protective layer;

[0037] Z represents the thickness direction of the flexible display panel; X represents the length direction of the flexible display panel. Detailed Implementation

[0038] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples. In the accompanying drawings and the following description, at least some well-known structures and techniques are not shown to avoid unnecessarily obscuring the application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0039] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the embodiments of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] Before describing the technical solutions provided by the embodiments of the present invention, in order to facilitate understanding of the embodiments of the present invention, the present invention first specifically explains the problems existing in the related art:

[0042] With the development of display technology, flexible displays have shown great potential in the display field. From fixed flexible displays to foldable displays, flexible display devices combine large size and portability. To further meet the requirements of convenient storage or portability when not in use, rollable flexible display devices are attracting increasing attention. Currently, rollable flexible display devices are mostly considered for use in laptops, tablets, and automotive applications. Due to considerations of space saving and portability, the number of rolls in the flexible display panel is increasing, thus placing increasingly higher demands on the design of flexible display panels, posing a significant challenge to the current display industry. In the field of display technology, flexible display devices are widely used in various fields requiring flexible displays due to their rollable characteristics. In a flexible display device, one end of the flexible display panel is fixed to a roll-up shaft, while the other end can rotate relative to the roll-up shaft, allowing the flexible display panel to be either rolled up on the roll-up shaft or flattened into a plane.

[0043] The inventors of this invention have discovered that during the rolling process of a flexible display panel, friction occurs on the surface of the flexible display panel, which may lead to damage to the flexible display panel.

[0044] In view of the inventors’ above-mentioned research findings, the present invention provides a flexible display device. By setting an interval layer on the side of the support layer away from the light-emitting side, and setting multiple isolation blocks in the interval layer, the included angle θ between the first bottom surface of the isolation block and the connecting surface is limited to 0° < θ < 90°. The included angle θ of the multiple isolation blocks gradually increases from the fixed side of the flexible display panel to the opposite side, so that the second bottom surface of the isolation block forms a progressive line contact with the outer wall of the rolling shaft and the adjacent flexible display layer during the rolling process. This effectively disperses the contact stress in different curvature areas and effectively prevents the flexible display panel from wearing or stress concentration during rolling or unfolding. It can solve the technical problem of damage caused by friction during the rolling process of flexible display devices in related technologies.

[0045] To better understand this application, the following will be combined with... Figures 1 to 8 The flexible display device according to the embodiments of this application will be described in detail.

[0046] Please refer to the following: Figures 1 to 8 , Figure 1 This is a schematic diagram of the structure of a flexible display device in its unfolded state, as provided in an embodiment of this application.

[0047] like Figure 1 As shown, the flexible display device provided in this application includes:

[0048] Curved shaft 1.

[0049] The flexible display panel 2 is wound around the winding shaft 1. The winding shaft 1 is used to switch the flexible display panel 2 between an unfolded state and a rolled state.

[0050] The flexible display panel 2 includes a spacer layer 23, a support layer 21 and a flexible display layer 22 arranged sequentially along its thickness direction.

[0051] The spacer layer 23 includes at least one isolation component 231. The isolation component 231 includes multiple isolation blocks 2311. The multiple isolation blocks 2311 are disposed on the side of the support layer 21 opposite to the flexible display layer 22. Each isolation block 2311 has a first bottom surface 2313, a second bottom surface 2314 opposite to each other along the thickness direction Z of the flexible display panel, and a connecting surface 2315 connecting the first bottom surface 2313 and the second bottom surface 2314. The first bottom surface 2313 is connected to the support layer 21. The included angle θ between the first bottom surface 2313 and the connecting surface 2315 satisfies: 0° < θ < 90°, and the included angle θ of the multiple isolation blocks 2311 gradually increases from the fixed side of the flexible display panel 2 to the opposite side of the fixed side.

[0052] In the embodiments provided in this application, the flexible display device includes a roller 1 and a flexible display panel 2 wound thereon. The roller 1 drives the flexible display panel 2 to switch between an unfolded state and a rolled state via a driving mechanism. The flexible display panel 2 has a spacer layer 23, a support layer 21, and a flexible display layer 22 stacked sequentially from the inside to the outside along its thickness direction. The spacer layer 23 includes at least one isolation component 231 coaxially arranged with the roller 1. The isolation component 231 includes multiple isolation blocks 2311. Each isolation block 2311 has a first bottom surface 2313, a second bottom surface 2314, and an inclined connecting surface 2315 perpendicular to the thickness direction of the flexible display panel 2. The first bottom surface 2313 is connected to the support layer 21, and the second bottom surface 2314 is disposed facing the outer circumferential surface of the roller 1. The first bottom surface 2313 is connected to the support layer 21. The included angle θ between the connecting surfaces 2315 is limited to 0° < θ < 90°, and the included angle θ of the multiple isolation blocks 2311 gradually increases from the fixed side of the flexible display panel 2 to the opposite side, so that the second bottom surface 2314 of the isolation block 2311 forms a progressive line contact with the outer wall of the rolling shaft 1 and the flexible display layer 22 of the adjacent ring during the rolling process, effectively dispersing the contact stress in different curvature areas, and effectively preventing wear or stress concentration of the flexible display panel 2 when rolling or unfolding. The support layer 21 does not need to contact the rolling shaft 1 or the flexible display layer 22, thus improving the performance of the flexible display device.

[0053] Optionally, the flexible display panel 2 includes, but is not limited to, an organic light-emitting diode (OLED) display panel, a millimeter / sub-millimeter light-emitting diode (Mini LED) display panel, a micro light-emitting diode (Micro LED) display panel, or a quantum dot light-emitting diode (QLED) display panel. That is, the flexible display layer 22 can be an OLED display layer, an LCD display layer, a Mini-LED display layer, a QLED display layer, or a micro-LED display layer; this application does not specifically limit this.

[0054] Optionally, the flexible display layer 22 includes a touch function layer. The touch function layer is disposed on the light-emitting side of the flexible display layer 22. The touch function layer is a key component for realizing touch operation. Through capacitive sensing or other technologies, the touch function layer can sense the position and movement of the user's finger or stylus and transmit this information to the control system of the display device, thereby enabling user interaction with the device.

[0055] Optionally, the touch function layer can be a capacitive touchscreen, an inductive touchscreen, or a resistive touchscreen, which are existing technologies and are not specifically limited in this application embodiment.

[0056] like Figure 1 As shown, the support layer 21 is disposed on the side of the flexible display layer 22 opposite to the light-emitting side. The support layer 21 primarily provides stable foundation support for the flexible display layer 22, ensuring its integrity and reliability. It also prevents damage to the flexible display layer 22 from external mechanical impacts or moisture. The support layer 21 is made of a deformable metal sheet, such as steel, tin, or copper, to ensure sufficient flexibility and strength to support the flexible display layer 22. Of course, the material of the support layer 21 can also be organic materials or carbon fiber, etc., and this application does not specifically limit this. For example, the material of the flexible support layer 21 can be a plastic material, such as a polyimide (PI) film.

[0057] like Figure 1 As shown, the spacer layer 23 is located on the backlight side of the flexible display panel 2. Placing the spacer layer 23 on the backlight side of the flexible display panel 2 avoids obstructing the normal display of the flexible display panel 2, ensuring a good display effect. Furthermore, placing the spacer layer 23 on the backlight side of the flexible display panel 2 ensures that the innermost part of the flexible display panel 2 is isolated from the outer surface of the roller 1, thereby preventing friction between the flexible display panel 2 and the roller 1 and avoiding wear on the flexible display panel 2.

[0058] Optionally, the spacer layer 23 can be transparent or opaque, and this application embodiment does not specifically limit this.

[0059] In a specific application scenario, from the fixed side to the opposite side of the flexible display panel 2, the included angles between the first bottom surface 2313 and the connecting surface 2315 of the multiple isolation blocks 2311 are defined as θ1, θ2, θ3...θ n θ1 is 15°, and increases by 3° every 5mm along the length X of the flexible display panel, until θ... n The angle is 75°. A gap of 0.1mm to 0.3mm is maintained between adjacent isolation blocks 2311 to accommodate curling deformation. This gradually increasing angle design ensures that during the curling process, the connecting surface 2315 of the isolation block 2311 forms a line contact with the outer wall of the curling shaft 1 with a small contact area, while the isolation block 2311 on the opposite side located on the fixed side gradually transitions to surface contact due to the increase in the included angle, thereby adapting to the curvature changes in different areas during curling and gradually adjusting the interlayer contact pressure of the flexible display panel 2.

[0060] In another specific application scenario, from the fixed side to the opposite side of the flexible display panel 2, the included angles between the first bottom surface 2313 and the connecting surface 2315 of the multiple isolation blocks 2311 are defined as θ1, θ2, θ3...θ n θ1 is 10°, and increases by 5° every 4mm along the length X of the flexible display panel, until θ... n The angle is 65°. At least a portion of the connecting surfaces 2315 between adjacent isolation blocks 2311 abut against each other. During the rolling process, the connecting surfaces 2315 of the isolation blocks 2311 can also form a line contact with the outer wall of the rolling shaft 1 with a small contact area, while the isolation blocks 2311 on the opposite side located on the fixed side gradually transition to surface contact due to the increase of the included angle, thereby adapting to the curvature changes of different areas during rolling and gradient adjusting the interlayer contact pressure of the flexible display panel 2.

[0061] Optionally, the surface of the spacer block 2311 may be coated with an anti-slip material to reduce the sliding friction coefficient of the spacer block 2311 and increase the surface hardness of the spacer block 2311, thereby doubly suppressing interfacial wear during the curling process. Optionally, the anti-slip material is molybdenum disulfide.

[0062] In some alternative embodiments, such as Figure 2 and Figure 3 As shown, the isolation assembly 231 also includes a buffer portion 2312. The buffer portion 2312 extends along the thickness direction Z of the flexible display panel and is located on the side of the isolation assembly 231 closer to the support layer 21. A plurality of isolation blocks 2311 are disposed on the side of the buffer portion 2312 opposite to the support layer 21.

[0063] In these alternative embodiments, the buffer portion 2312 is disposed on the side of the isolation assembly 231 near the support layer 21 to effectively absorb and disperse the pressure or impact on the outer flexible display layer 22 and the outer support layer 21 during the rolling process, preventing the pressure or impact from being transmitted to the inner flexible display layer 22. Multiple isolation blocks 2311 are located on the side of the buffer portion 2312 opposite to the support layer 21, cooperating with the buffer portion 2312 to provide effective cushioning and physical isolation.

[0064] Optionally, multiple isolation blocks 2311 are integrally embedded in the buffer part 2312 on the side away from the support layer 21 by injection molding, so that the first bottom surface 2313 of the isolation block 2311 and the buffer part 2312 form a mechanical interlocking connection to ensure the interface bonding strength.

[0065] Optionally, the surface of the buffer portion 2312 between adjacent isolation blocks 2311 is provided with wavy grooves to generate directional airflow during the rolling process to dissipate heat from the contact surface.

[0066] Optionally, the buffer portion 2312 is made of elastic silicone material and is attached to the inner surface of the support layer 21.

[0067] Optionally, the buffer section is rectangular. The dimension of the buffer section along the width direction of the flexible display panel 2 is consistent with the width of the flexible display panel 2 to ensure a better buffering effect.

[0068] In some alternative embodiments, such as Figure 1 and Figure 4 As shown, multiple isolation blocks 2311 are arranged at intervals or adjacent to each other along the length direction X of the flexible display panel.

[0069] In these optional embodiments, multiple isolation blocks 2311 can be arranged at intervals or adjacently, depending on actual process requirements. For example... Figure 1 As shown, when multiple isolation blocks 2311 are arranged at intervals along the length X of the flexible display panel, there is a certain distance between any two adjacent isolation blocks 2311 to enhance the flexibility of the flexible display panel 2. Especially in applications where the flexible display panel 2 needs to be bent frequently, arranging multiple isolation blocks 2311 at intervals can effectively disperse the stress between adjacent coiled structures. The distance between any two adjacent isolation blocks 2311 can be reasonably set according to actual application requirements to balance the needs of flexibility and support.

[0070] like Figure 4 As shown, when multiple isolation blocks 2311 are arranged adjacent to each other along the length direction X of the flexible display panel, the multiple isolation blocks 2311 can form a large support strength, avoid large deformation of the flexible display panel 2 during use, and thus ensure the stability of the flexible display device.

[0071] In some alternative embodiments, such as Figure 5 As shown, each isolation block 2311 extends along the width direction of the flexible display panel 2.

[0072] In these optional embodiments, multiple isolation blocks 2311 are disposed on the side of the buffer portion 2312 opposite to the support layer 21, and each isolation block 2311 extends along the width direction of the flexible display panel 2. This arrangement helps to evenly distribute the load-bearing capacity of the flexible display panel 2 along its width direction, enabling the isolation blocks 2311 to function as isolation blocks throughout the entire width direction of the flexible display panel 2. This ensures that the pressure is evenly distributed along the width direction of the flexible display panel 2 at different bending angles, avoiding damage or deformation of the panel due to concentrated stress in one direction. Simultaneously, the arrangement of the isolation blocks 2311 effectively prevents unnecessary direct contact between the flexible display layer 22 and the support layer 21, thereby improving the service life of the display panel.

[0073] In some alternative embodiments, such as Figure 6As shown, multiple isolation blocks 2311 are arranged in multiple rows. Each row of isolation blocks 2311 is arranged along the length direction X of the flexible display panel. The multiple rows of isolation blocks 2311 are arranged at intervals along the width direction of the flexible display panel 2.

[0074] In these optional embodiments, multiple isolation blocks 2311 are arranged in rows to form a multi-row structure. Each row of isolation blocks 2311 is arranged along the length direction X of the flexible display panel, and the multiple rows of isolation blocks 2311 are spaced apart along the width direction of the flexible display panel 2. The purpose is to ensure that the flexible display panel 2 can evenly distribute the force in its length and width directions when it is bent, so as to avoid damage to the panel due to local stress concentration. At the same time, it ensures the stability of the flexible display panel 2 in the width direction, further enhances the structural strength of the flexible display panel 2, and prevents the flexible display panel 2 from uneven deformation during high-frequency bending or use.

[0075] In some alternative embodiments, the material of the isolation block 2311 includes a flexible material. In the unfolded state, there is a gap between two adjacent isolation blocks 2311 in the same isolation assembly 231. In the curled state, the connecting surfaces 2315 of two adjacent isolation blocks 2311 in the same isolation assembly 231 are fitted together.

[0076] In these optional embodiments, the isolation block 2311 not only possesses good elasticity but also exhibits different physical properties in its unfolded and rolled states. In the unfolded state, a certain gap is formed between two adjacent isolation blocks 2311 in the isolation assembly 231, which helps reduce stress accumulation in the flexible display panel 2 during unfolding, ensuring its stability. In the rolled state, the connecting surfaces 2315 of two adjacent isolation blocks 2311 in the isolation assembly 231 will adhere to each other, effectively preventing excessive deformation or damage to the flexible display panel 2 during rolling. Simultaneously, the mutual adhesion of the connecting surfaces 2315 of any two adjacent isolation blocks 2311 in the rolled state increases the support strength of the entire spacer layer 23 to the aforementioned film layer, providing a better support effect. The flexible elasticity of the isolation block 2311 ensures its deformability in different forms while maintaining good sealing in the rolled state. It provides sufficient buffering, support, and isolation during the unfolding or rolling of the flexible display panel 2, ensuring the structural integrity and service life of the flexible display device.

[0077] Optionally, the material of the spacer block 2311 includes one or more of silicone rubber, polyurethane, foam material, polytetrafluoroethylene, thermoplastic elastomer, foamed silicone, or ethylene-vinyl acetate copolymer.

[0078] Of course, in some embodiments, the material of the isolation block 2311 may include one or more of organic materials, metallic materials, ceramic materials or composite materials.

[0079] In some optional embodiments, the material of the isolation block 2311 includes a flexible material and a magnetic material. The isolation block 2311 itself may be magnetic or become magnetic when energized, and the like poles of the isolation blocks 2311 in adjacent coiled structures repel each other. For example, the material of the isolation block 2311 may be magnetic rubber, a ferromagnetic flexible material, or a metal-polymer composite material. In this embodiment, the isolation block 2311 not only isolates the flexible display panel 2 from the coiled shaft 1 and isolates any two adjacent coiled structures, but also, due to the repulsive force between the spacer layers 23 between any two coiled structures, the two adjacent coiled structures repel each other and form a certain gap under the action of the repulsive force, thereby more effectively avoiding friction during the coiling process of the flexible display panel 2, and thus achieving better protection for the flexible display panel 2.

[0080] In some alternative embodiments, the second bottom surface 2314 is arc-shaped. The arc of the second bottom surface 2314 of the plurality of isolation blocks 2311 gradually decreases from the fixed side of the flexible display panel 2 to the opposite side of the fixed side.

[0081] In these optional embodiments, the second bottom surface 2314 is arc-shaped and the curvature of the second bottom surface 2314 of the plurality of isolation blocks 2311 gradually decreases from the fixed side of the flexible display panel 2 to the opposite side, so that the second bottom surface 2314 of the isolation block 2311 can fit better with the outer wall of the winding shaft 1 or the flexible display layer 22 of the adjacent ring during the rolling process, and effectively disperse the contact stress in different curvature areas, further optimizing the wear resistance performance of the flexible display device.

[0082] Alternatively, the cross-section of the isolation block 2311 can be either an inverted trapezoid or a semi-circle.

[0083] In some alternative embodiments, the flexible display device further includes a frame and a drive motor. The drive motor is mounted on the frame. The drive end of the drive motor is connected to the winding shaft 1. Figure 7 and Figure 8 As shown, the outer wall of the roller 1 is provided with a stepped structure 11. The fixed side of the flexible display panel 2 is fixed to the stepped structure 11. The width of the stepped structure 11 along the thickness direction Z of the flexible display panel is consistent with the thickness of the flexible display panel 2.

[0084] In these optional embodiments, the winding shaft 1 can be rotated by the driving action of the drive motor, thereby causing the flexible display panel 2 to be rolled up or unrolled. The outer wall of the winding shaft 1 is provided with a stepped structure 11. The stepped structure 11 extends along the outer periphery of the winding shaft 1 and has a certain width. The fixed side of the flexible display panel 2 is firmly fixed to the stepped structure 11, ensuring the stability and accuracy of the flexible display panel 2 during the rolling process. The width of the step structure 11 is consistent with the thickness direction Z of the flexible display panel, so that the dimension of the step structure 11 along the thickness direction Z of the flexible display panel matches the thickness of the flexible display panel 2. That is, the fixed side of the flexible display panel 2 is flush with the outer periphery of the rolling shaft 1. This not only ensures that the flexible display panel 2 can be firmly fixed on the rolling shaft 1, but also prevents the flexible display panel 2 from warping during the rolling process. It also avoids deformation or stress concentration of the flexible display panel 2 due to unevenness of the inner ring, so that the flexible display panel 2 and the rolling shaft 1 fit tightly, ensuring that the flexible display panel 2 can be rolled or unfolded stably, thus improving the service life and stability of the entire flexible display device.

[0085] Optionally, the drive motor can be a stepper motor or a servo motor.

[0086] In some alternative embodiments, such as Figure 8 As shown, the winding shaft 1 has a first semicircular portion 12 and a second semicircular portion 13. The diameters of the first semicircular portion 12 and the second semicircular portion 13 are different. The straight edge segment of the first semicircular portion 12 is connected to the straight edge segment of the second semicircular portion 13 to form a stepped structure 11 on the outer surface of the winding shaft 1.

[0087] In these optional embodiments, the first semicircular portion 12 and the second semicircular portion 13 have different diameters, and the straight edge segment of the first semicircular portion 12 is connected to the straight edge segment of the second semicircular portion 13 to form an outer surface with a stepped structure 11 on the winding shaft 1. The first semicircular portion 12 and the second semicircular portion 13 are connected in the above manner, which not only forms the stepped structure 11, but also ensures that the outer peripheral wall of the winding shaft 1 formed by these two components matches the winding path of the flexible display panel 2 well during the winding process. This results in better stability and support for the winding shaft 1 during the winding process, effectively preventing uneven winding or jamming of the flexible display panel 2 during winding, and also preventing wear. Furthermore, this embodiment ensures that the winding shaft 1 maintains a relatively smooth running trajectory during the winding process of the flexible display panel 2, reducing the risk of damage to the display panel.

[0088] Optionally, the first end of the straight edge segment of the first semicircular portion 12 and the first end of the straight edge segment of the second semicircular portion 13 are connected, and the second end of the straight edge segment of the first semicircular portion 12 and the second end of the straight edge segment of the second semicircular portion 13 have a step difference, thereby forming a stepped structure 11 on the outer surface of the winding shaft 1. Optionally, the difference in diameter between the first semicircular portion 12 and the second semicircular portion 13 is the dimension of the stepped structure 11 along the thickness direction Z of the flexible display panel, and this difference in diameter is the same as the thickness of the flexible display panel 2. Optionally, the diameters of the first semicircular portion 12 and the second semicircular portion 13 can be specifically defined according to the actual thickness of the flexible display panel 2.

[0089] In some optional embodiments, there are multiple isolation components 231. These multiple isolation components 231 are arranged at intervals along the length X of the flexible display panel to ensure the effectiveness of the spacer layer 23 in protecting the flexible display layer 22. This ensures that the support layer 21 and the flexible display layer 22 between any two adjacent coiled structures in the coiled state do not contact each other, further preventing friction of the flexible display panel 2 during the coiling process. This ensures the performance of the flexible display device and improves the user experience.

[0090] In some optional embodiments, from the fixed side of the flexible display panel 2 to the opposite side of the fixed side, the dimensions of a plurality of isolation components 231 gradually increase along the length direction X of the flexible display panel. Among them, the dimension of the isolation component 231 closest to the fixed side of the flexible display panel 2 along the length direction X of the flexible display panel is equal to the sum of the arc length of the first semicircle 12 and the arc length of the second semicircle 13.

[0091] In these alternative embodiments, the shape and size of each isolation component 231 can be adjusted according to the structural requirements of the flexible display panel 2 to ensure that appropriate isolation and support can be effectively provided during the bending or unfolding of the flexible display panel 2, preventing damage or functional failure of the flexible display panel 2 due to bending deformation.

[0092] The specific calculation method for the sum of the arc lengths of the first semicircular portion 12 and the second semicircular portion 13 can be determined through geometric analysis, wherein the radii of the first semicircular portion 12 and the second semicircular portion 13 are respectively related to different bending regions of the flexible display panel 2. As the flexible display panel 2 extends from the fixed side to the opposite side, the size of the isolation component 231 gradually increases to adapt to the support requirements caused by the curvature changes of the flexible display panel 2. The differentiated design of the specific dimensions of each isolation component 231 not only ensures the flexible bending performance of the flexible display panel 2, but also provides good uniform support when the panel is under stress, avoiding local excessive pressure that could damage the display effect of the flexible display layer 22 or destroy the flexible display layer 22.

[0093] During implementation, various manufacturing methods such as injection molding, die casting, and 3D printing can be used. The material, shape, and size of the isolation components 231 can be adjusted according to the specific application scenario of the flexible display panel 2 (such as smartphones, wearable devices, etc.). In addition, the spacing and arrangement of the isolation components 231 can also be optimized according to different usage requirements to ensure the stability and good display effect of the flexible display device.

[0094] In some alternative embodiments, the spacer layer 23 is bonded to the side of the support layer 21 opposite to the flexible display layer 22.

[0095] In these alternative embodiments, the connection surfaces 2315 of the spacer layer 23 and the support layer 21 are bonded together by a suitable adhesive material such as glue, tape or by a hot pressing process to ensure a good connection between the support layer 21 and the flexible display layer 22, and to avoid curling jamming or structural damage caused by the separation of the spacer layer 23 and the support layer 21 during the curling process.

[0096] In some alternative embodiments, the spacer layer 23 and the support layer 21 are an integral structure.

[0097] In these alternative embodiments, by directly integrating the spacer layer 23 and the support layer 21 during the manufacturing process to form a composite structure, the manufacturing process is simplified, manufacturing costs are reduced, and the overall structural stability is improved. The spacer layer 23 and the support layer 21 are an integral structure, allowing for uniform stress distribution when the flexible display panel 2 is rolled or unfolded, preventing stress concentration caused by structural separation, thereby ensuring the long-term stability and excellent display performance of the flexible display panel 2.

[0098] In some alternative embodiments, the spacer layer 23 is made of the same material as the support layer 21 to optimize the manufacturing process.

[0099] In some optional embodiments, the flexible display panel 2 further includes a protective layer 24. The protective layer 24 is disposed on the side of the flexible display layer 22 opposite to the support layer 21. In the rolled-up state, a portion of the spacer layer 23 contacts the outer wall of the roll-up shaft 1, and another portion contacts the protective layer 24.

[0100] In these optional embodiments, the flexible display panel 2 includes a support layer 21, a flexible display layer 22, and a protective layer 24 stacked sequentially from bottom to top. The protective layer 24 can be a transparent polyimide film. In the rolled-up state, the spacer layer 23 is disposed between the support layer 21 and the rolling shaft 1 and is in an elastically compressed state. Its first contact area near the center of the rolling shaft 1 forms a surface contact with the outer circumferential surface of the rolling shaft 1, while its second contact area extending radially abuts against the upper surface of the protective layer 24. This prevents friction between the support layer 21 and the outer wall of the rolling shaft 1, as well as between the support layer 21 and the upper surface of the protective layer 24, during the rolling process. The spacer layer 23 ensures flexibility during the rolling process, while the protective layer 24 provides protection, preventing scratches on the protective layer 24.

[0101] Optionally, the protective layer 24 can be a single or multiple organic material layer, such as a transparent polyimide (CPI) material layer, a polyethylene terephthalate (PET) material layer, or a thermoplastic polyurethane elastomer (TPU) material layer; it can also be a single or multiple inorganic material layer, such as an ultrathin flexible glass (UTG) material layer, a silicon monoxide (SiO) material layer, or a silicon nitride (SiN) material layer; or it can be a composite film layer of the above-mentioned organic material layer and the above-mentioned inorganic material layer.

[0102] The flexible display devices in this application include, but are not limited to, mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, control consoles, and other devices with display functions.

[0103] It should be clarified that the various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. According to the embodiments of the present invention described above, these embodiments do not exhaustively describe all details, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made based on the above description. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to make good use of the present invention and modifications based on it. The present invention is limited only by the claims and their full scope and equivalents.

[0104] Those skilled in the art will understand that the above embodiments are exemplary and not restrictive. Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Based on a study of the drawings, specification, and claims, those skilled in the art should be able to understand and implement other variations of the disclosed embodiments. No reference numerals in the claims should be construed as limiting the scope of protection. The appearance of certain technical features in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A flexible display device, characterized in that, include: Curved shaft; A flexible display panel is wound around the winding shaft, which is used to drive the flexible display panel to switch between an unfolded state and a rolled state; The flexible display panel includes a spacer layer, a support layer, and a flexible display layer arranged sequentially along its thickness direction; The spacer layer includes at least one isolation component, which includes multiple isolation blocks disposed on the side of the support layer away from the flexible display layer. Each isolation block has a first bottom surface and a second bottom surface opposite to each other along the thickness direction of the flexible display panel, and a connecting surface connecting the first bottom surface and the second bottom surface. The first bottom surface is connected to the support layer. The included angle θ between the first bottom surface and the connecting surface satisfies: 0° < θ < 90°, and the included angle θ of the multiple isolation blocks gradually increases from the fixed side of the flexible display panel to the opposite side of the fixed side.

2. The flexible display device according to claim 1, characterized in that, The isolation component further includes a buffer section that extends along the thickness direction of the flexible display panel and is located on the side of the isolation component close to the support layer. A plurality of isolation blocks are disposed on the side of the buffer section away from the support layer.

3. The flexible display device according to claim 1, characterized in that, The plurality of isolation blocks are arranged at intervals or adjacent to each other along the length direction of the flexible display panel; Preferably, each of the isolation blocks extends along the width direction of the flexible display panel; Alternatively, multiple isolation blocks may be arranged in rows, with each row of isolation blocks arranged along the length of the flexible display panel, and the multiple rows of isolation blocks arranged at intervals along the width of the flexible display panel.

4. The flexible display device according to any one of claims 1-3, characterized in that, The material of the isolation block includes a flexible material; In the unfolded state, there is a gap between two adjacent isolation blocks in the same isolation assembly; in the curled state, the connecting surfaces of two adjacent isolation blocks in the same isolation assembly are fitted together.

5. The flexible display device according to claim 1, characterized in that, The second bottom surface is arc-shaped, and the arc of the second bottom surface of the plurality of isolation blocks gradually decreases from the fixed side of the flexible display panel to the opposite side of the fixed side; Alternatively, the cross-section of the isolation block may be an inverted trapezoid or a semi-circle.

6. The flexible display device according to claim 1, characterized in that, It also includes a frame and a drive motor, the drive motor is mounted on the frame, and the drive end of the drive motor is connected to the winding shaft; the outer wall of the winding shaft is provided with a stepped structure, the fixed side of the flexible display panel is fixed to the stepped structure, and the width of the stepped structure along the thickness direction of the flexible display panel is consistent with the thickness of the flexible display panel.

7. The flexible display device according to claim 6, characterized in that, The winding shaft has a first semicircular portion and a second semicircular portion, the diameters of the first semicircular portion and the second semicircular portion are different, and the straight edge segment of the first semicircular portion is connected to the straight edge segment of the second semicircular portion to form the stepped structure on the outer surface of the winding shaft.

8. The flexible display device according to claim 7, characterized in that, The isolation components are multiple, and the multiple isolation components are arranged at intervals along the length direction of the flexible display panel; Preferably, from the fixed side of the flexible display panel to the opposite side of the fixed side, the dimensions of the plurality of isolation components gradually increase along the length direction of the flexible display panel; wherein, the dimension of the isolation component closest to the fixed side of the flexible display panel along the length direction of the flexible display panel is equal to the sum of the arc length of the first semicircle and the arc length of the second semicircle.

9. The flexible display device according to claim 1, characterized in that, The spacer layer is bonded to the side of the support layer opposite to the flexible display layer; Alternatively, the spacer layer and the support layer may be an integral structure.

10. The flexible display device according to claim 1, characterized in that, The flexible display panel further includes a protective layer disposed on the side of the flexible display layer away from the support layer; in the curled state, a portion of the spacer layer contacts the outer wall of the curling shaft, and another portion contacts the protective layer.

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