WO2025007632A1 - Display apparatus - Google Patents

Abstract

A display apparatus (10), comprising a screen assembly (1) and a rolling assembly. The screen assembly (1) comprises a flexible display panel (11) and a supporting plate (12). The supporting plate (12) is arranged on the side of the flexible display panel (11) facing away from a light exit surface. The supporting plate (12) is bonded to the flexible display panel (11) by means of a flexible bonding layer (13). The screen assembly (1) comprises a stretching end (14) and a fixed end (15). The flexible bonding layer (13) at least comprises a first deformation state, and in the first deformation state, there is a first relative displacement between the flexible display panel (11) and the supporting plate (12). The rolling assembly is used for winding and/or supporting the screen assembly (1). The display apparatus (10) can improve the flatness of the unfolded flexible display panel (11), so as to improve the user experience.

Description

Display device

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese patent application 202310819795.8, filed on July 5, 2023, entitled “Display Device”, the entire contents of which are incorporated herein by reference.

Technical Field

The present application belongs to the field of display technology, and in particular, relates to a display device.

Background Art

With the development of display technology, the performance requirements for display devices are getting higher and higher. Flexible display panels have the advantages of being bendable, flexible, thin and light, and having low power consumption, and have broad application prospects.

The roll-up screen display device is an emerging product that uses flexible display panels. The roll-up screen can be stretched and rolled up, has high space utilization, and is small in size, light in weight, interesting, and can achieve greater display effects. However, the roll-up display device has the problem of poor flatness, which affects the user experience.

Summary of the invention

The embodiments of the present application provide a display device, which can improve the flatness of a flexible display panel after it is unfolded, so as to improve the user experience.

An embodiment of a first aspect of the present application provides a display device, including:

A screen assembly, comprising a flexible display panel and a support plate, wherein the support plate is arranged on a side of the flexible display panel away from a light emitting surface, and the support plate is bonded to the flexible display panel via a flexible adhesive layer;

The flexible adhesive layer comprises at least a first deformation state, and in the first deformation state, a first relative displacement is comprised between the flexible display panel and the support plate;

The curling assembly is used for rolling up and/or supporting the screen assembly.

In the display device provided in the present application, the support plate and the flexible display panel are connected by flexible bonding. The flexible adhesive layer is bonded to the flexible display panel, and the flexible adhesive layer includes at least a first deformation state. In the first deformation state, the flexible display panel and the support plate include a first relative displacement. On the one hand, the flexible adhesive layer can fix the support plate and the flexible display panel. On the other hand, due to the flexible characteristics of the flexible adhesive layer itself, when the display device is in the storage state, that is, when the screen assembly is in the curled state, the displacement of the side surface of the flexible adhesive layer facing the flexible display panel and the side surface facing the support plate during the curling process can be asynchronous, thereby generating a first relative displacement to improve the probability of wrinkles and other defects after curling, and the flexible adhesive layer can flatten the side surface of the support plate facing the flexible display panel to improve the flatness. At the same time, the flexible adhesive layer can also reduce the noise during the storage and unfolding of the screen assembly.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a display device in a storage state provided by an embodiment of the present application;

FIG2 is a schematic structural diagram of a display device in an unfolded state provided by an embodiment of the present application;

FIG3 is a cross-sectional schematic diagram of a display device provided in an embodiment of the present application;

FIG4 is an exploded view of a display device provided in an embodiment of the present application;

FIG5 is a side view of a display device provided in an embodiment of the present application;

FIG6 is a cross-sectional view of a support plate in a display device provided in an embodiment of the present application;

FIG7 is a top view of a support plate in a display device provided in an embodiment of the present application;

Fig. 8 is a cross-sectional view along P-P' in Fig. 7;

FIG9 is a top view of a support plate in another display device provided in an embodiment of the present application;

FIG10 is a schematic structural diagram of a retractable support member in a display device provided in an embodiment of the present application;

FIG11 is a schematic diagram of a support rod assembly in a retractable support member in a display device provided in an embodiment of the present application;

FIG12 is a partial schematic diagram of a spacer block in a display device provided in an embodiment of the present application;

FIG. 13 is a schematic diagram of a spacer block of a support rod assembly in a retractable support member in a display device provided in an embodiment of the present application.

DETAILED DESCRIPTION

The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description, many specific details are proposed in order to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present application by illustrating the examples of the present application.

The inventor has found through research that in a rollable display device, since the support plate needs to take into account both support and rollability, its flatness is difficult to ensure, which seriously affects the flatness of the flexible display panel and thus seriously affects the user experience. Based on the research on the above problem, the inventor provides a display device with significantly improved flatness.

In order to better understand the present application, a display device according to an embodiment of the present application is described in detail below with reference to FIGS. 1 to 13 .

Referring to FIGS. 1 to 5 , an embodiment of the present application provides a display device 10, including a screen assembly 1 and a rolling assembly. The screen assembly 1 includes a flexible display panel 11 and a support plate 12, the support plate 12 is arranged on the side of the flexible display panel 11 away from the light-emitting surface, the support plate 12 and the flexible display panel 11 are bonded by a flexible adhesive layer 13, the flexible adhesive layer 13 includes at least a first deformation state, and in the first deformation state, the flexible display panel and the support plate include a first relative displacement. The rolling assembly is used to roll up and/or support the screen assembly 1.

In the display device 10 provided in the present application, as shown in FIG. 1 and FIG. 2 , the display device 10 includes a storage state and an unfolded state, and the display device 10 includes a screen assembly 1 and a rolling assembly. As shown in FIG. 3 , the screen assembly 1 includes a flexible display panel 11 and a support plate 12, and the support plate 12 is used to provide support for the flexible display panel 11. The rolling assembly is used to roll up and/or support the screen assembly 1, so that the display device 10 switches between the storage state and the unfolded state.

In the display device 10 provided by the present application, as shown in FIG3 , the support plate 12 and the flexible display panel 11 are bonded by a flexible adhesive layer 13, and the flexible adhesive layer 13 includes at least a first deformation state. In the first deformation state, the flexible display panel 11 and the support plate 12 include a first relative displacement. On the one hand, the flexible adhesive layer 13 can fix the support plate 12 and the flexible display panel 11. On the other hand, due to the flexible characteristics of the flexible adhesive layer 13 itself, when the display device 10 is in the storage state 10, that is, when the screen assembly 1 is in the curled state, the displacement of the side surface of the flexible adhesive layer 13 facing the flexible display panel 11 and the side surface facing the support plate 12 during the curling process may not be synchronized, thereby generating a first relative displacement to improve the probability of defects such as wrinkles after curling. The flexible adhesive layer 13 can flatten the surface of the support plate 12 facing the flexible display panel 11 to improve the flatness. At the same time, the flexible adhesive layer 13 can also reduce the noise during the storage and unfolding of the screen assembly 1.

In a feasible embodiment, the screen assembly 1 includes a stretching end 14 and a fixed end 15. The curling assembly 1 includes a fixed frame (not shown in the figure), a reel 22 and a retractable support member 23, the reel 22 is connected to the fixed frame, the fixed end 15 is connected to the reel 22, the retractable support member 23 is located on the side of the screen assembly 1 away from the light emitting surface, one end of the retractable support member 23 is connected to the fixed frame, and the other end of the retractable support member 23 is connected to the stretching end 14, and the retractable support member 23 can be retracted along a first direction y, wherein the first direction y intersects with the axial direction x of the reel 22.

In the above embodiment, the rolling assembly includes a fixed frame (not shown in the figure), a reel 22 and a retractable support member 23, the reel 22 is connected to the fixed frame, and the fixed frame can provide support for the reel 22. As shown in FIG4, the screen assembly 1 includes a stretching end 14 and a fixed end 15, and the retractable support member 23 can drive the stretching end 14 to move by stretching along the first direction y, thereby realizing the conversion of the display device 10 between the storage state and the unfolded state. Specifically, the fixed end 15 is connected to the reel 22, so that the screen assembly 1 is wound around the reel 22. The retractable support member 23 is located on the side of the screen assembly 1 away from the light-emitting surface of the flexible display panel 11. One end of the retractable support member 23 is connected to the fixing frame to fix this end so as to provide supporting force for the retractable support member 23. The other end of the retractable support member 23 is connected to the stretching end 14 so as to provide supporting force to the stretching end 14 through the retractable support member 23. The fixed end 15 of the screen assembly 1 and one end of the retractable support member 23 are both fixed to the fixing frame. When the retractable support member 23 is extended, the stretching end 14 can be driven away from the fixing frame, thereby realizing the unfolding of the screen assembly 1.

In a feasible implementation, as shown in FIG. 3 , the thickness of the flexible display panel 11 is h, the thickness of the flexible adhesive layer 13 is H, and 0.01h≤H≤10h.

In the above embodiment, the thickness of the flexible adhesive layer 13 is set to 0.01-10 times the thickness of the flexible display panel 11. Specifically, the thickness of the flexible adhesive layer 13 can be set to 0.05 times, 0.1 times, 0.5 times, 1.5 times, 2 times, 5.5 times, etc., of the thickness of the flexible display panel 11. On the one hand, it can avoid that the thickness of the flexible adhesive layer 13 is too small and the flatness is not improved well. On the other hand, it can avoid that the flexible adhesive layer 13 is too thick and affects the storage effect of the screen assembly 1. Exemplarily, the thickness H of the flexible adhesive layer 13 is set to 0.05 times or 1 times the thickness h of the flexible display panel 11. When the thickness of the flexible adhesive layer 13 is too small, the thickness of the flexible adhesive layer 13 is too thick. When the layer 13 is too thick, the overall thickness of the screen assembly 1 will increase, making the radius of the curled screen assembly 1 too large, the volume too large, and the space occupied too large, which is not conducive to achieving lightweight display device 10. When the thickness of the flexible adhesive layer 13 is within the above range, the volume of the display device 10 can be small, which is convenient for storage and saves storage space.

In a feasible embodiment, the material of the flexible adhesive layer 13 includes a colloid, so that the flexible adhesive layer may include a first deformation state, that is, a first relative displacement is generated between a side surface of the flexible adhesive layer 13 facing the flexible display panel 11 and a side surface facing the support plate 12, so as to improve the probability of wrinkles and cracks on the flexible display panel 11 during the curling process, thereby improving the yield of the flexible display panel 11.

In a feasible implementation manner, the thickness of the flexible adhesive layer 13 is 0.01 mm-3 mm.

Specifically, the thickness of the flexible adhesive layer 13 may be 0.01 mm, 0.05 mm, 0.08 mm, 1.00 mm, 1.01 mm, 1.10 mm, 1.35 mm, 1.88 mm, 2.06 mm, 2.29 mm, 3.00 mm, etc., which is not particularly limited in the present application.

In a feasible embodiment, as shown in Fig. 4, Fig. 6, Fig. 7 and Fig. 8, the support plate 12 includes support bars 121 arranged along a first direction y and extending along a second direction, the first direction y being a direction from the fixed end 15 to the stretching end 14, and the second direction intersecting the first direction y. The second direction may be parallel to the axis direction x of the reel.

In the above embodiment, adjacent support bars 121 are bonded together by the flexible adhesive layer 13 .

In the above embodiment, the support plate 12 includes a plurality of support bars 121, and the plurality of support bars 121 are arranged along the first direction y, so that when the screen assembly 1 is wound on the reel 22, good stress release is performed through the flexible adhesive layer 13 between the support bars 121, thereby reducing the probability of wrinkles and improving the probability of cracks on the support plate 12 during the curling process, thereby improving the yield of the display device 10.

In a feasible implementation manner, as shown in FIG. 8 , the flexible adhesive layer 13 covers the support bar 121 .

In the above embodiment, by means of the flexible adhesive layer 13 covering the support bar 121, on the one hand, the support bars 121 can be connected to each other, and on the other hand, the side of the support plate 12 facing away from the flexible display panel 11 can also have the flexible adhesive layer 13, so that after curling, the flexible display panel 11 is in direct contact with the flexible adhesive layer 13 instead of the support bar 121. The layer 13 is made of a flexible material, which can reduce damage to the flexible display panel 11. At the same time, the flexible adhesive layer 13 is used to wrap the support bar 121 in all directions, thereby reducing noise during the curling and unfolding process.

Specifically, in the above implementation, the noise can be reduced to a range of less than 60 decibels, thereby improving the user experience.

In the above embodiment, the assembly alignment accuracy of the flexible display panel 11 and the support plate 12 is controlled within 0.2 mm, and the assembly alignment accuracy of the support plate 12 is controlled within 0.2 mm, which can help improve the structural stability of the screen assembly 1, so that the display device 10 can be switched between the storage state and the unfolded state up to 50,000 times, thereby improving the reliability of the display device 10.

In a feasible embodiment, as shown in FIG3 , the flexible adhesive layer 13 includes a first surface 131, and the first surface 131 is located on the side of the flexible adhesive layer 13 facing the flexible display panel 11. When the first surface 131 is in a flat state, the distance between the first surface 131 and the flexible display panel 11 is d, and 0≤d≤0.03mm. Specifically, d can be 0.001mm, 0.005mm, 0.01mm, 0.012mm, 0.03mm, etc. Due to the processing accuracy, the first surface 131 may include a concave area and a convex area, and the above d is used to characterize the flatness/roughness of the first surface 131.

In the above embodiment, the first surface 131 of the flexible adhesive layer 13 is used to contact and bond with the flexible adhesive layer 13. However, due to the limitation of processing and preparation accuracy, it is necessary to ensure that the distance between the position (recessed area) of the first surface 131 that is not in contact with the flexible display panel 11 and the flexible display panel 11 is less than or equal to 0.03 mm, thereby further improving the flatness of the first surface 131 to improve the flatness of the screen assembly 1, especially the flexible display panel 11 in the unfolded state, so as to improve the user experience.

In a feasible implementation, as shown in FIG8 , the thickness of the support bar 121 is D, the thickness of the flexible display panel 11 is h, and 0.01h≤D≤10h.

In the above embodiment, the thickness of the support bar 121 is set to 0.01-10 times the thickness of the flexible display panel 11. For example, the thickness of the support bar 121 is set to 0.05, 1, 1.2, 3, 5.5 or 8 times the thickness of the flexible display panel 11. On the one hand, it can avoid that the thickness of the support bar 121 is too small, which will have a poor effect on improving the flatness and supporting effect. On the other hand, it can avoid that the support bar 121 is too thick and affects the storage effect of the screen assembly 1. For example, when the support bar 121 is too thick, the overall thickness of the screen assembly 1 will be thickened, making the radius of the curled screen assembly 1 too large and the body too thin. The support bar 121 has a large area and occupies a large space, which is not conducive to achieving lightweight display device 10. When the thickness of the support bar 121 is within the above range, the display device 10 can be made smaller in size, easy to store, and save storage space. Thus, the support effect of the support bar 121 on the flexible display panel 11 and the volume of the screen assembly 1 can be taken into account at the same time.

In a feasible implementation manner, the thickness of the support bar 121 is D, 0.01 mm≤D≤5 mm.

Specifically, the thickness of the support bar 121 may be 0.01 mm, 0.05 mm, 1.00 mm, 1.08 mm, 1.10 mm, 1.45 mm, 1.90 mm, 2.10 mm, 2.58 mm, 3.00 mm, 3.35 mm, 3.68 mm, 3.9 mm, 4.58 mm, 4.73 mm, 4.98 mm, 5.00 mm, etc., and the present application does not make any special limitation.

In a feasible implementation, as shown in FIG. 7 , in the plane where the screen assembly 1 is located, in the direction from the fixed end 15 to the stretching end 14 , the width of the support bar 121 is L, 1 mm ≤ D ≤ 20 mm.

Specifically, the width L of the support bar 121 can be 1mm, 1.05mm, 1.10mm, 1.18mm, 2.50mm, 3.45mm, 4.60m, 7.10mm, 8.58mm, 9.33mm, 10.00mm, 11.35m, 12.40mm, 13.71mm, 14.53mm, 15.00mm, 17.00mm, 20.00mm, etc., and is not particularly limited in this application.

In the above embodiment, within a certain width range, the smaller the width of the support bar 121, the greater the difficulty of preparation, and the smaller the curling stress generated during the curling process; the larger the width of the support bar 121, the smaller the difficulty of preparation, but the greater the curling stress generated during the curling process. Setting the width of the support bar 121 within the above range can take into account the curling radius during the curling process on the one hand, and reduce the difficulty of preparation on the other hand.

In a feasible implementation manner, as shown in FIG. 7 and FIG. 8 , in the plane where the screen assembly 1 is located, along the first direction, that is, along the direction from the fixed end 15 to the stretching end 14 , the width of the support bar 121 gradually increases.

In the above embodiment, since the curling radius is smaller at the position closer to the reel 22 and larger at the position farther from the reel 22 in the support plate 12, the plurality of support bars 121 in the support plate 12 are arranged along the first direction, and the width of the support bars 121 is gradually increased, thereby improving the curling effect. The support bars 121 of the stretching end 14 are arranged to be wider, which can enhance the curvature of the end screen assembly 1 Flatness when unfolded.

In a feasible implementation manner, as shown in FIG. 9 , the support plate 12 includes a main body portion 122 and a plurality of hollow portions 123 formed in the main body portion 122 .

In the above embodiment, the support plate 12 includes a main body portion 122 and a hollow portion 123. The hollow portion 123 is formed in the main body portion 122. The main body portion 122 can play a supporting role. The hollow portion 123 can be used to reduce weight on the one hand, and can be used to release stress and improve wrinkles in the curling process of the support plate 12 on the other hand.

In a feasible embodiment, the shape of the hollow portion 123 is a rhombus, which includes a first diagonal line S1 and a second diagonal line S2. The length of the first diagonal line S1 is less than the length of the second diagonal line S2. The direction of the first diagonal line S1 is the same as the direction of the fixed end 15 in the support plate 12 pointing to the stretching end 14.

In the above embodiment, the shape of the hollow portion 123 is a rhombus, and the shorter of the two diagonals of the rhombus is set to be the same as the direction (i.e., the first direction) in which the fixed end 15 of the support plate 12 points to the stretching end 14, so that the support plate 12 can ensure the support effect of the flexible display panel 11 in the stretching direction of the flexible display panel 11, so that the display device 10 is more stable in the unfolded state. The longer of the two diagonals of the rhombus is set to be the same as the axial direction of the scroll 22, so that the stress during the curling process can be weakened to improve the curling effect.

In a feasible embodiment, as shown in Figures 4 and 10, the curling assembly includes two retractable supports 23, which are respectively arranged at two ends of the fixing frame along the axial direction of the reel 22. Thus, the fixing frame can provide stable support for the two retractable supports 23.

In the above embodiment, the two retractable support members 23 are symmetrically distributed along the center line of the screen assembly 1 which is perpendicular to the axial direction x of the reel 22 .

In the above embodiment, the number of retractable support members 23 is two, and the retractable support members are arranged on the side of the screen assembly 1 away from the light emitting surface, and are symmetrically distributed along the center line of the screen assembly 1 perpendicular to the axial direction x of the reel 22, thereby providing symmetrical support for the screen assembly 1, achieving force balance on both sides of the screen assembly 1 along the axis of the reel 22, making the support effect more stable, and improving the difference in curling radius at both ends of the screen assembly 1 along the axial direction x of the reel 22 during the curling and unfolding process of the screen assembly 1, thereby improving the winding performance of the screen assembly 1.

In a feasible embodiment, as shown in FIG. 10 and FIG. 11 , the retractable support member 23 includes The support rod assembly 231 includes a first support rod 2311 and a second support rod 2312. The middle of the first support rod 2311 and the middle of the second support rod 2312 are rotatably connected, and adjacent support rod assemblies 231 are arranged along a first direction. The telescopic support member 23 includes at least two support rod assemblies 231. Two adjacent support rod assemblies 231 include a first assembly 2313 and a second assembly 2314. An end of the first support rod 2311 in the first assembly 2313 close to the second assembly 2314 is rotatably connected to an end of the second support rod 2312 in the second assembly 2314 close to the first assembly 2313. An end of the second support rod 2312 in the first assembly 2313 close to the second assembly 2314 is rotatably connected to an end of the first support rod 2311 in the second assembly 2314 close to the first assembly 2313.

The telescopic support member 23 may include a plurality of support rod assemblies 231, wherein the middle portion of the first support rod 2311 and the middle portion of the second support rod 2312 in the support rod assembly 231 are rotatably connected, so that the telescopic support member 23 may be telescopically connected by changing the angle a between the first support rod 2311 and the second support rod 2312. When the angle a between the first support rod 2311 and the second support rod 2312 in each support rod assembly 231 is 0 degrees, the telescopic support member 23 may be retracted, and when the angle a between the first support rod 2311 and the second support rod 2312 is greater than 0 degrees, the telescopic support member 23 may be extended. Since the adjacent support rod assemblies 231 are rotatably connected, linkage may be achieved, that is, the telescopic support member 231 may be telescopically connected by adjusting the angle a between the first support rod 2311 and the second support rod 2312 in one support rod assembly 231.

In the above embodiment, the retractable support member 23 is stored separately from the screen assembly 1 , the screen assembly 1 is wound on the reel 22 , and the retractable support member 23 is folded and stored on the side of the screen assembly 1 away from the display surface.

In a feasible embodiment, as shown in Figures 4 and 10, it also includes a driving component 3, the retractable support member 23 is connected to the driving component 3, the retractable support member 23 includes a first support rod assembly 232, the first support rod assembly 232 is the support rod assembly 231 in the retractable support member 23 close to the fixed end 15, the driving component 3 is used to adjust the angle a between the first support rod 2311 and the second support rod 2312 in the first support rod assembly 232; the retractable support member 23 also includes a second support rod assembly 233, the second support rod assembly 233 is the support rod assembly 231 in the retractable support member 23 away from the fixed end 15, the first support rod 2311 in the second support rod assembly 233 is fixedly connected to the screen body assembly 1, and the second support rod 2312 is slidably connected to the screen body assembly 1.

In the above embodiment, the retractable support member 23 includes a plurality of support rod assemblies 231. The one of the support rod assemblies 231 close to the fixed end 15 is the first support rod assembly 232, and the one of the multiple support rod assemblies 231 far from the fixed end 15 is the second support rod assembly 233. When the telescopic support member 23 is in the storage state, the multiple support rod assemblies 231 are all stored on the side close to the fixed frame. By setting the driving assembly 3 to adjust the angle a between the first support rod 2311 and the second support rod 2312 in the first support rod assembly 232, the telescopic state of each support rod assembly 231 in the telescopic support member 23 can be synchronously driven.

In a feasible embodiment, as shown in FIG4 , the driving assembly 3 includes a motor 31 and a screw rod 32, the motor 31 is connected to the screw rod 32 and is used to drive the screw rod 32 to rotate, the first support rod 2311 in the first support rod assembly 232 is threadedly connected to the screw rod 32, and the second support rod 2312 is fixedly connected to the screw rod 32 and one of the fixing frames;

In the above embodiment, the driving assembly 3 includes a motor 31 and a screw rod 32. The motor 31 drives the end of the screw rod 32 to rotate via a pulley, thereby realizing the rotation of the screw rod 32 along its own axial direction x.

The first support rod 2311 in the first support rod assembly 232 is threadedly connected to the screw rod 32, so that the first support rod 2311 can be driven to move along the axis of the screw rod 32 during the rotation of the screw rod 32. The second support rod 2312 in the first support rod assembly 232 is fixedly connected to the screw rod 32 and one of the fixing frame, so that the angle between the first support rod 2311 and the second support rod 2312 can be adjusted by only moving the first support rod 2311.

When the second support rod 2312 is fixed to the screw rod 32, since the driving assembly 3 is fixed to the fixing frame, the second support rod 2312 and the fixing frame can be indirectly fixed, that is, the retractable support rod and the fixing frame are fixed.

In a feasible embodiment, as shown in FIG. 4 , the screw rod 32 includes a first threaded portion 321 disposed opposite to one telescopic support member 23 and a second threaded portion 322 disposed opposite to another telescopic support member 23 , and the first threaded portion 321 and the second threaded portion 322 rotate in opposite directions.

In the above embodiment, by making the screw rod 32 include two parts, the first threaded portion 321 and the second threaded portion 322, and the rotation directions of the first threaded portion 321 and the second threaded portion 322 are opposite, the two components (the first support rod 2311 of the first support rod assembly 232 and the first support rod 2311 of the second support rod assembly 233) can be adjusted in different directions by only one screw rod 32.

Specifically, since there are two retractable support members 23 and the retractable support members 23 are arranged vertically in the screen assembly 1, They are symmetrically distributed about the center line of the axial direction x of the reel 22. Therefore, the fixed end 15 at which the second support rod 2312 in the first support rod assembly 232 in each retractable support member 23 is fixedly connected to the screw rod 32 and one of the fixed frames is set to be located on a side away from the other retractable support member 23, thereby further improving the support of the retractable support member 23 for the two end portions of the screen assembly 1 along the axial direction x of the reel 22, and further improving the flatness of the screen assembly 1 in the unfolded state and the consistency of the curling radius at both ends in the stored state.

In a feasible embodiment, as shown in FIG. 4 , the retractable bracket further includes a connecting rod 21, the connecting rod 21 is fixed to the stretching end 14, the connecting rod 21 includes a slide groove 211, the second support rod 2312 in the second support rod assembly 233 is slidably connected to the slide groove 211, and the first support rod 2311 in the second support rod assembly 233 is riveted and fixed to the connecting rod 21;

In the above embodiment, the retractable bracket further includes a connecting rod 21, wherein the connecting rod 21 and the support plate 12 can be fixed by bonding or riveting, which is not particularly limited in the present application. The connecting rod 21 is used to realize the connection between the retractable support member 23 and the stretching end 14, specifically, the connecting rod 21 includes a slide groove 211, the first support rod 2311 in the second support rod assembly 233 is riveted and fixed to the connecting rod 21, and the second support rod 2312 in the second support rod assembly 233 is slidably connected to the slide groove 211, so that the angle between the first support rod 2311 and the second support rod 2312 in the second support rod assembly 233 can be adjusted by moving the second support rod 2312, thereby realizing the telescopic movement of the second support rod assembly 233.

In a feasible embodiment, as shown in Figure 4, the display device 10 also includes a slide rail 4, and the slide rail 4 is arranged in parallel with the screw rod 32. The first support rod 2311 in each first support rod assembly 232 is respectively slidably connected to the slide rail 4, so that the synchronization of the first support rod 2311 in each first support rod assembly 232 can be achieved to improve the stability and reliability of the drive assembly 3 when driving the retractable support member 23 to move.

In a feasible implementation, as shown in FIG4 , the driving assembly 3 further includes a coil spring 33 , the restoring force of the coil spring 33 is 1-3 times the restoring force of the flexible display panel 11 , specifically 1 time, 1.05 times, 1.1 times, 1.5 times, 2 times or 3 times.

The restoring force of the coil spring 33 is the force of the coil spring 33 resisting the external force to restore to the natural state when the coil spring changes from the natural state to the curled state under the action of the external force. The restoring force of the flexible display panel 11 is the force of the flexible display panel 11 resisting the external force to restore to the flat state when the flexible display panel changes from the flat state to the curled state under the action of the external force.

In the above embodiment, the coil spring 33 can maintain the transmission reliability. Specifically, during the unfolding process of the screen assembly 1, the driving assembly 3 drives the retractable support member 23 to extend, thereby driving the stretching end 14 to move to the side away from the fixed end 15, so that the screen assembly 1 can be unfolded. At this time, the coil spring 33 can be driven to resist its own restoring force. The coil spring 33 can provide damping for the extension of the retractable support member 23, control and maintain the torque during the unfolding process, balance the force and speed provided by the retractable support member 23 during the unfolding process of the screen assembly 1, and prevent the stretching process from being too fast, causing uneven force at various positions of the stretching end 14, that is, the coil spring 33 helps to improve the stability of the unfolding process and improve the flatness of the screen assembly 1 during the unfolding process. During the storage process of the screen assembly 1, the coil spring 33 controls the torque of the contraction process.

In the above embodiment, the pulling force of the motor 31 needs to be greater than the restoring force of the coil spring 33 to achieve the unfolding of the screen assembly 1 .

In a feasible implementation manner, as shown in FIG. 4 and FIG. 12 , it further includes a spacer block 5 , which is disposed on both side edges of the support plate 12 . There are multiple spacer blocks 5 and they are arranged along the extension direction of the edge.

The spacer blocks 5 are disposed on two side edges of the support plate 12 that are opposite to each other along the second direction.

In the above embodiment, by providing the spacer block 5, the probability of the flexible display panel 11 contacting other components (such as the support plate 12) during the curling process can be improved, thereby reducing the wear on the side of the flexible display panel 11 away from the support plate 12 and improving the display quality of the flexible display panel 11.

There are multiple spacer blocks 5 arranged along the extending direction of the edge to improve the curling performance.

In a feasible implementation manner, a connecting portion 51 is provided between two adjacent spacer blocks 5 .

In a feasible implementation, along the thickness direction of the support plate 12, the distance M between the end of the spacer block away from the support plate 12 and the end of the spacer block 5 toward the support plate 12, the thickness of the flexible display panel 11 is h, and M>h. Therefore, a certain gap can be reserved between the flexible display panel 11 and other components through the contact between the spacer blocks 5 to prevent the flexible display panel 11 from contacting other components.

In the above embodiment, M is greater than h by 0.1 mm or more.

In the above embodiment, when the support plate 12 is unfolded, the spacer block 5 has an arc, triangle or polygonal shape in the cross section along the thickness direction of the support plate 12 at one end away from the support plate 12 , which is not particularly limited in the present application.

In a feasible embodiment, as shown in Figure 13, the spacer block 5 includes a first size from the direction close to the fixed end 15 and away from the fixed end 15, and each spacer block 5 in the edge gradually increases the first size from the direction close to the fixed end 15 and away from the fixed end 15.

In the above embodiment, during the curling process, the curling radius close to the fixed end 15 is smaller, and the curling radius away from the fixed end 15 is larger. Therefore, the first dimensions of each spacer block 5 in the edge are set to gradually increase from the direction close to the fixed end 15 and the direction away from the fixed end 15, thereby improving the curling effect.

In a feasible implementation, as shown in FIG3 , the flexible display panel 11 includes a flexible substrate 111, a driving circuit layer 112, a light-emitting device layer 113, and an encapsulation layer 114 stacked in a direction away from the support plate 12, and the neutral layer of the screen assembly 1 overlaps with the encapsulation layer 114 in the flexible display panel 11. In the bending process, the tension on one side of the screen assembly 1 is greater than that on the other side, and the pressure on the other side is smaller than that on the other side. The neutral layer is the position where the tension and pressure on the inside of the screen assembly 1 are the same during the bending process of the screen assembly 1.

In the above embodiment, the neutral layer of the screen assembly 1 and the encapsulation layer 114 in the flexible display panel 11 are set to overlap, so that the flexible display panel 11 can be protected, especially the reliability of the encapsulation layer 114 is improved, and the probability of cracks in the encapsulation layer 114 is reduced, thereby improving the yield of the flexible display panel 11 and the display device 10 and improving the service life.

In the above embodiment, the display device 10 may further include a polarizer 115 and a cover plate 116 located on the side of the encapsulation layer 114 facing the light emitting surface, which is not particularly limited in the present application.

According to the embodiments of the present application as above, these embodiments do not describe all the details in detail, nor do they limit the application to specific embodiments. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can make good use of the present application and the modifications based on the present application. The present application is limited only by the claims and their full scope and equivalents.

Claims (20)

A display device, comprising: A screen assembly, comprising a flexible display panel and a support plate, wherein the support plate is arranged on a side of the flexible display panel away from a light emitting surface, and the support plate is bonded to the flexible display panel via a flexible adhesive layer; The flexible adhesive layer comprises at least a first deformation state, and in the first deformation state, a first relative displacement is comprised between the flexible display panel and the support plate; The curling assembly is used for rolling up and/or supporting the screen assembly. The display device according to claim 1, wherein the screen assembly comprises a stretching end and a fixed end; The curling assembly includes a fixed frame, a reel and a retractable support member, the reel is connected to the fixed frame, the fixed end is connected to the reel, the retractable support member is located on the side of the screen assembly away from the light emitting surface, one end of the retractable support member is connected to the fixed frame, and the other end of the retractable support member is connected to the stretching end, and the retractable support member can be retracted and extended along a first direction, and the first direction intersects with the axial direction of the reel. The display device according to claim 1, wherein the thickness of the flexible display panel is h, the thickness of the flexible adhesive layer is H, 0.01h≤H≤10h; and/or the material of the flexible adhesive layer includes colloid; And/or, the thickness of the flexible adhesive layer is 0.01 mm-3 mm. The display device according to claim 1, wherein the support plate comprises support bars arranged along a first direction and extending along a second direction, the first direction is a direction from the fixed end to the stretching end, and the second direction intersects with the first direction; And/or, adjacent support bars are bonded together by the flexible adhesive layer. The display device according to claim 4, wherein the flexible adhesive layer covers the support bar. The display device according to claim 5, wherein the flexible adhesive layer comprises a first surface, the first surface is located on a side of the flexible adhesive layer facing the flexible display panel, and when the first surface is in a flat state, the first surface and the flexible display panel are The distance is d, 0≤d≤0.03mm. The display device according to claim 4, wherein the thickness of the support bar is D, the thickness of the flexible display panel is h, 0.01h≤D≤10h; and/or, The thickness of the support strip is D, 0.01 mm ≤ D ≤ 5 mm; And/or, in the plane where the screen assembly is located, the width of the support bar along the second direction is L, 1mm≤L≤20mm. The display device according to claim 4, wherein: In the plane where the screen assembly is located, along the first direction, the width of the support bar gradually increases. The display device according to claim 1, wherein the support plate comprises a main body portion and a plurality of hollow portions formed in the main body portion. The display device according to claim 9, wherein the shape of the hollow portion includes a rhombus, the rhombus includes a first diagonal line and a second diagonal line, the length of the first diagonal line is less than the length of the second diagonal line, and the direction of the first diagonal line is the same as the direction in which the fixed end in the support plate points to the stretching end. The display device according to claim 2, wherein the curling assembly comprises two retractable support members, and the two retractable support members are respectively arranged at two ends of the fixing frame along the axial direction of the scroll shaft. The display device according to claim 11, wherein the retractable support member includes a support rod assembly, the support rod assembly includes a first support rod and a second support rod, the middle portion of the first support rod and the middle portion of the second support rod are rotatably connected, and adjacent support rod assemblies are arranged along the first direction. The display device according to claim 11, wherein the retractable support member comprises at least two support rod assemblies, two adjacent support rod assemblies comprise a first assembly and a second assembly, an end of the first support rod in the first assembly close to the second assembly is rotatably connected to an end of the second support rod in the second assembly close to the first assembly, and an end of the second support rod in the first assembly close to the second assembly is rotatably connected to an end of the first support rod in the second assembly close to the first assembly; and/or, The two retractable supports are arranged along the screen assembly in a direction perpendicular to the axis of the scroll. Symmetrical distribution around the midline. The display device according to claim 11, wherein it also includes a driving assembly, the retractable support member is connected to the driving assembly, the retractable support member includes a first support rod assembly, the first support rod assembly is the support rod assembly in the retractable support member close to the fixed end, and the driving assembly is used to adjust the angle between the first support rod and the second support rod in the first support rod assembly; the retractable support member also includes a second support rod assembly, the second support rod assembly is the support rod assembly in the retractable support member away from the fixed end, the first support rod in the second support rod assembly is fixedly connected to the screen body assembly, and the second support rod is slidably connected to the screen body assembly. According to the display device of claim 14, the driving assembly includes a motor and a screw, the motor is connected to the screw and is used to drive the screw to rotate, the first support rod in the first support rod assembly is threadedly connected to the screw, and the second support rod is fixedly connected to the screw and one of the fixed frame. The display device according to claim 15, wherein the screw comprises a first threaded portion disposed opposite to one of the retractable supports and a second threaded portion disposed opposite to another of the retractable supports, and the first threaded portion and the second threaded portion rotate in opposite directions. The display device according to claim 11, wherein the retractable support member further comprises a connecting rod, the connecting rod is fixed to the stretching end, the connecting rod comprises a slide groove, the second support rod in the second support rod assembly is slidably connected to the slide groove, and the first support rod in the second support rod assembly is riveted and fixed to the connecting rod; and/or, The display device further comprises a slide rail, wherein the slide rail is arranged in parallel with the lead screw, and the first support rods in each of the first support rod assemblies are respectively slidably connected to the slide rail; and/or, The driving component also includes a coil spring, and the restoring force of the coil spring is 1-3 times the restoring force of the flexible display panel. The display device according to claim 1, further comprising a spacer block, wherein the spacer block is arranged on both side edges of the support plate, and the number of the spacer blocks is multiple and arranged along the extension direction of the edge; And/or, a connecting portion is provided between two adjacent spacer blocks. The display device according to claim 17, wherein along the thickness direction of the support plate, The distance between one end of the spacer block away from the support plate and one end of the spacer block toward the support plate is M, the thickness of the flexible display panel is h, and M>h; and/or, the spacer block comprises a first size from close to the fixed end to away from the fixed end, and the first size of each spacer block in the edge from close to the fixed end to away from the fixed end gradually increases; and/or, The cross section of the support plate along the thickness direction of the support plate includes one or more of a triangle, a polygon or an arc. The display device according to claim 1, wherein the flexible display panel comprises a flexible substrate, a driving circuit layer, a light-emitting device layer and an encapsulation layer stacked in a direction away from the support plate, and the neutral layer of the screen assembly overlaps with the encapsulation layer in the flexible display panel.