WO2024066160A1 - Supporting assembly and display module - Google Patents

Abstract

Disclosed in the present application are a supporting assembly and a display module. The display module comprises a supporting assembly, wherein the supporting assembly further comprises a first supporting elastic sheet and a second supporting elastic sheet, which correspond to a bending display portion; the first supporting elastic sheet is provided with first supporting teeth, and the side surface of the second supporting elastic sheet located opposite the first supporting elastic sheet is provided with second supporting teeth; when the display module is bent, a plurality of first supporting teeth and a plurality of second supporting teeth are arranged in an interdigitating manner to form an accommodating space; and the bending display portion is located in the accommodating space.

Description

Support components and display modules Technical Field

The present application relates to the field of display, and in particular to a supporting component and a display module.

Background technique

Folding phones mainly use flexible organic electroluminescence displays (OLEDs) as their displays. Flexible OLED displays bend during use, so they cannot be protected by a thicker glass cover like LCD screens. Compared to LCD screens, flexible OLED screens are more fragile, especially when they are accidentally dropped or collided during use. Flexible OLED screens are prone to display device layer failure under the action of external impact forces, which usually manifests as bright lines, black spots, or even large areas of black screen in the bending area.

Usually, the location where foldable phones experience such failures is mainly in the bending zone, that is, the reliability of the bending zone is relatively weak. The main reason is that the OLED display module in the bending zone needs to be bent, and a certain amount of space needs to be left between the bottom side of the OLED display module in the bending zone and the middle frame structure to form an air avoidance zone to prevent the OLED module from being deformed when bent. Therefore, it is impossible to use colloid to directly bond the flexible OLED screen to the middle frame of the mobile phone. When a foldable phone falls or collides, the hinge structure and some parts of the middle frame structure deform and vibrate under the action of the impact force, which will directly squeeze the OLED display module structure in the bending zone, causing the flexible OLED screen in the bending zone to fail.

Therefore, it is urgent to improve the impact resistance of the screen itself when it falls by reasonably designing the OLED module structure.

technical problem

The embodiments of the present application provide a support assembly and a display module to solve the technical problem that after the display module is hit, the external impact force is transmitted to the position of the hinge assembly of the display module, thereby affecting the normal display of the flexible display panel.

Technical Solutions

To solve the above problems, the technical solutions provided by this application are as follows:

The present application provides a display module, including:

A flexible display panel, comprising a first planar display portion, a second planar display portion, and a bent display portion located between the first planar display portion and the second planar display portion;

A support assembly, arranged on a non-luminous surface side of the flexible display panel, the support assembly comprising a first support plate, a second support plate and a hinge assembly, the first support plate being rotatably connected to one side of the hinge assembly around a central axis, the second support plate being rotatably connected to the other side of the hinge assembly around the central axis, the first support plate and the second support plate being rotatably connected via the hinge assembly, the first planar display portion being arranged on the first support plate, and the second planar display portion being arranged on the second support plate;

Wherein, the support assembly includes an auxiliary support layer arranged on a side of the hinge assembly close to the flexible display panel, the auxiliary support layer includes a first support spring sheet and a second support spring sheet arranged on the hinge assembly, the first support spring sheet and the second support spring sheet are rotatably connected through the hinge assembly, a side of the first support spring sheet close to the second support spring sheet is provided with a plurality of first support teeth, a side of the second support spring sheet close to the first support spring sheet is provided with a plurality of second support teeth, and the plurality of first support teeth and the plurality of second support teeth are staggered;

The display module includes a first flat state and a second folded state. In the second state, the bent display portion is in a bent state. The display module includes a accommodating space located between the first supporting spring sheet and the second supporting spring sheet, and the bent display portion is located in the accommodating space.

In one embodiment, the bent display portion includes a first sub-display portion and a second sub-display portion respectively located on both sides of the central axis, the first sub-display portion is arranged corresponding to the first supporting spring piece, and the second sub-display portion is arranged corresponding to the second supporting spring piece, and in the second state, the first sub-display portion overlaps with at least a portion of the second supporting tooth, and the second sub-display portion overlaps with at least a portion of the first supporting tooth.

In one embodiment, the hinge assembly further comprises a first floating plate rotatably connected to one side of the hinge, and a second floating plate rotatably connected to the other side of the hinge, the first floating plate is slidably connected to the first support plate, the second floating plate is slidably connected to the second support plate, and the first floating plate and the second floating plate are respectively arranged on both sides of the central axis;

Wherein, a side edge of the first supporting spring sheet close to the first supporting plate is connected to the first floating plate, and a side edge of the second supporting spring sheet close to the second supporting plate is connected to the second floating plate.

In one embodiment, in the second state, the first supporting teeth are in curved abutment with the second floating plate, and the second supporting teeth are in curved abutment with the first floating plate.

In one embodiment, the first supporting spring sheet and/or the second supporting spring sheet include a first surface and a second surface arranged parallel to each other, the first supporting spring sheet and/or the second supporting spring sheet include at least one connecting portion, the connecting portion is arranged between the first surface and the second surface, and connects the first surface and the second surface, the connecting portion has a first angle with the first surface, and the connecting portion has a second angle with the second surface, so that the first supporting spring sheet and/or the second supporting spring sheet present an alternating concave-convex structure in a first direction, and the first direction is perpendicular to the central axis.

In one embodiment, the first supporting spring sheet and/or the second supporting spring sheet include at least two first horizontal portions flush with the first surface and at least one second horizontal portion flush with the second surface, and in the first direction, the first horizontal portions and the second horizontal portions are alternately arranged, and the first horizontal portions and the second horizontal portions are connected by the connecting portion.

In one embodiment, in the first direction, the widths of the first horizontal portion and the second horizontal portion are equal, and the width of the first horizontal portion is smaller than the length of the first supporting tooth or the second supporting tooth.

In one embodiment, in the first direction, the ratio of the width of the first horizontal portion to the width of the first supporting spring is 0.2-0.25, and the ratio of the width of the second horizontal portion to the width of the second supporting spring is 0.2-0.25.

In one embodiment, the first horizontal portion, the second horizontal portion and the connecting portion have the same thickness, and a ratio of the thickness of the first horizontal portion to the distance between the first surface and the second surface is 0.3-0.5.

In one embodiment, in the first state, the first supporting teeth are meshed with the second supporting teeth, and a projection of the auxiliary supporting layer in a direction perpendicular to the flexible display panel covers the hinge.

In one embodiment, in a direction from the first supporting elastic piece to the second supporting elastic piece, the width of the first supporting tooth gradually decreases;

In a direction from the second supporting elastic piece to the first supporting elastic piece, the width of the second supporting tooth gradually decreases.

In one embodiment, in a direction perpendicular to the flexible display panel, projections of the first supporting teeth and the second supporting teeth each include a trapezoid, a triangle, or an arc.

In one embodiment, in a direction from the first supporting elastic piece to the second supporting elastic piece, the thickness of the first supporting tooth gradually decreases;

In a direction from the second supporting elastic piece to the first supporting elastic piece, the thickness of the second supporting tooth gradually decreases.

In one embodiment, in the first state, edges of the plurality of first supporting teeth and edges of the plurality of second supporting teeth are seamlessly spliced, and the plurality of first supporting teeth and the plurality of second supporting teeth are alternately arranged in a direction along the central axis.

In one embodiment, the flexible display panel includes a display function layer and a stress reduction support layer which are stacked, the stress reduction support layer is arranged on a side of the display function layer facing the support assembly, and the stress reduction support layer includes a bending portion corresponding to the hinge assembly and two non-bending portions located on both sides of the bending portion and corresponding to the first support plate and the second support plate;

The bending portion includes two first sub-portions and a second sub-portion located between the two first sub-portions, the second sub-portion is arranged corresponding to the central axis, a plurality of penetrating stress-reducing holes are arranged on the second sub-portion, and a plurality of stress-reducing blind holes are arranged on the first sub-portion;

The second sub-portion at least covers the first supporting tooth and the second supporting tooth, and the orthographic projection of the bent portion on the display function layer is located within the orthographic projection of the auxiliary supporting layer on the display function layer.

In one embodiment, the stress reducing blind hole is an elongated groove, and the length direction of the elongated groove is parallel to the central axis.

In one embodiment, the first supporting spring piece and the second supporting spring piece are both integrated structures, and the first supporting spring piece and the second supporting spring piece are made of the same material, including metal or alloy.

The present application also provides a support assembly, comprising:

a first support plate;

a second support plate;

A hinge assembly, one side of which is rotatably connected to the first support plate around a central axis, and the other side of which is rotatably connected to the second support plate around the central axis, wherein the first support plate and the second support plate are rotatably connected via the hinge assembly;

Wherein, the support assembly further includes an auxiliary support layer, the auxiliary support layer includes a first support spring sheet and a second support spring sheet arranged on the hinge assembly, the first support spring sheet and the second support spring sheet are rotatably connected through the hinge assembly, a side of the first support spring sheet close to the second support spring sheet is provided with a plurality of first support teeth, and a side of the second support spring sheet close to the first support spring sheet is provided with a plurality of second support teeth;

When the first support plate and the second support plate switch from a flat state to a folded state, the plurality of first support teeth and the plurality of second support teeth are arranged alternately.

In one embodiment, the hinge assembly further comprises a first floating plate rotatably connected to one side of the hinge, and a second floating plate rotatably connected to the other side of the hinge, the first floating plate is slidably connected to the first support plate, the second floating plate is slidably connected to the second support plate, and the first floating plate and the second floating plate are respectively arranged on both sides of the central axis;

Wherein, a side edge of the first supporting elastic sheet close to the first supporting plate is connected to the first floating plate, and a side edge of the second supporting elastic sheet close to the second supporting plate is connected to the second floating plate.

In one embodiment, in the folded state, the first supporting teeth are in curved abutment with the second floating plate, and the second supporting teeth are in curved abutment with the first floating plate.

Beneficial Effects

The present application sets a support component of the display module, including a hinge component, and an auxiliary support layer arranged on a side of the hinge component close to the flexible display panel, the auxiliary support layer includes a first support spring sheet and a second support spring sheet arranged on the hinge component, the first support spring sheet and the second support spring sheet are rotatably connected through the hinge component, a plurality of first support teeth are arranged on a side of the first support spring sheet close to the second support spring sheet, and a plurality of second support teeth are arranged on a side of the second support spring sheet close to the first support spring sheet; the display module includes a flat first state and a folded second state, in the second state, a plurality of first support teeth and a plurality of second support teeth are staggered to form an accommodating space, and the bent display portion of the flexible display panel is located in the accommodating space, so that when the display module is in the bent second state, the first support spring sheet and the second support spring sheet can absorb and store more impact potential energy through bending deformation, so as to avoid that when the display module is hit by an external impact force, the external impact force is transmitted to the position of the hinge component of the display module, and the deformation of the hinge component affects the normal display of the flexible display panel.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of a display module provided in an embodiment of the present application;

FIG2 is an exploded view of a display module provided in an embodiment of the present application;

FIG3 is a schematic structural diagram of a support assembly provided in an embodiment of the present application;

FIG4 is a schematic structural diagram of a support assembly provided in an embodiment of the present application;

FIG5 is a schematic structural diagram of a support assembly in a bending process provided by an embodiment of the present application;

FIG6 is a partial structural schematic diagram of a support assembly provided in an embodiment of the present application;

FIG7 is a partial structural schematic diagram of a support assembly provided in an embodiment of the present application;

FIG8 is a schematic structural diagram of an auxiliary support layer provided in an embodiment of the present application;

FIG9 is a schematic structural diagram of a first supporting spring provided in an embodiment of the present application;

FIG10 is a partial structural schematic diagram of a support assembly provided in an embodiment of the present application;

FIG11 is a partial structural schematic diagram of a support assembly in a simulated bending state provided by an embodiment of the present application;

FIG12a is a schematic structural diagram of an auxiliary support layer provided in an embodiment of the present application;

FIG12b is a schematic structural diagram of an auxiliary support layer provided in an embodiment of the present application;

FIG12c is a schematic structural diagram of an auxiliary support layer provided in an embodiment of the present application;

FIG13a is a schematic structural diagram of a first supporting spring provided in an embodiment of the present application;

FIG13b is a schematic structural diagram of a first supporting spring provided in an embodiment of the present application;

FIG14 is a schematic diagram of the structure of a flexible display panel provided in an embodiment of the present application;

FIG. 15 is a schematic diagram of the structure of a stress reducing support layer provided in an embodiment of the present application.

Embodiments of the present invention

The present application provides a support assembly and a display module. To make the purpose, technical solution and effect of the present application clearer and more specific, the present application is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

At present, foldable display devices mainly use flexible display screens, which need to be bent during use. Flexible OLED screens are often fragile and have poor impact resistance. In particular, when users accidentally drop or bump their phones during use, the flexible screen is prone to display device failure under the action of external impact forces, usually resulting in bright lines, black spots, or even large areas of black screen in the bending area.

Usually, the location where such failure occurs in the display device is mainly located in the bending area, that is, the reliability of the bending area is relatively weak. The main reason is that the display module in the bending area needs to be bent, and a certain space needs to be left between the bottom side of the bending area of the flexible display and the supporting structure. Therefore, it is impossible to use colloid to directly bond the screen body to the supporting structure to prevent the flexible display body from being deformed when it is bent.

However, when the foldable display device falls or collides, the hinge structure and some parts of the middle frame structure that play a bending role in the support structure are prone to deformation and vibration under the action of the impact force, which will directly squeeze the module structure of the flexible screen in the bending area, thereby causing the screen to fail. Therefore, it is necessary to reasonably design the display module structure to improve the impact resistance of the screen itself when it falls.

In order to solve the problem that the flexible screen of a foldable display module is easily damaged and fails when it falls in a folded state or is impacted by external force, the present application provides the following technical solution, please refer to the following embodiments and Figures 1 to 15 for details.

The embodiment of the present application provides a display module, as shown in FIGS. 1 to 15 , including:

The flexible display panel 10 comprises a first planar display portion 101, a second planar display portion 102, and a bent display portion 103 located between the first planar display portion 101 and the second planar display portion 102;

A support assembly 20 is disposed on one side of the backlight surface of the flexible display panel 10, and the support assembly 20 includes a first support plate 2013, a second support plate 2014 and a hinge assembly, wherein the first support plate 2013 is rotatably connected to one side of the hinge assembly around a central axis CL, and the second support plate 2014 is rotatably connected to the other side of the hinge assembly around the central axis CL, and the first support plate 2013 and the second support plate 2014 are rotatably connected through the hinge assembly, the first planar display portion 101 is disposed on the first support plate 2013, and the second planar display portion 102 is disposed on the second support plate 2014;

Wherein, the support assembly 20 includes an auxiliary support layer 203 arranged on a side of the hinge assembly close to the flexible display panel 10, the auxiliary support layer 203 includes a first support spring piece 2031 and a second support spring piece 2032 arranged on the hinge assembly, the first support spring piece 2031 and the second support spring piece 2032 are rotatably connected through the hinge assembly, a side of the first support spring piece 2031 close to the second support spring piece 2032 is provided with a plurality of first support teeth 2031c, a side of the second support spring piece 2032 close to the first support spring piece 2031 is provided with a plurality of second support teeth 2032c, and the plurality of first support teeth 2031c and the plurality of second support teeth 2032c are staggered;

Specifically, the staggered arrangement means that when the display module is in the second state, multiple first supporting teeth 2031c and multiple second supporting teeth 2032c are arranged in sequence along the extension direction of the central axis CL according to the rule of first supporting tooth 2031c, second supporting tooth 2032c, first supporting tooth 2031c, second supporting tooth 2032c...

The display module includes a flat first state and a folded second state. In the second state, the bending display portion 103 is in a bending state (i.e., in a U shape), and the rotation directions of the first supporting spring sheet 2031 and the second supporting spring sheet 2032 are different, so that the first supporting spring sheet 2031 and the second supporting spring sheet 2032 cross at the position where the first supporting tooth 2031c and the second supporting tooth 2032c intersect, and the ends corresponding to the first supporting tooth 2031c and the second supporting tooth 2032c maintain the straight state in the original direction, and the first supporting tooth 2031c and the second supporting tooth 2032c are slightly X-shaped in the extension direction along the central axis CL, as shown in Figures 10 and 11. Figure 10 is a schematic diagram of the structure in which the first supporting tooth 2031c of the first supporting spring sheet 2031 and the second supporting tooth 2032c of the second supporting spring sheet 2032 are staggered and relative to the hinge during the conversion of the display module from the first state to the second state, and Figure 11 is a schematic diagram of a partial structure of the display module during the simulation bending process;

As shown in Figure 10, the display module includes an accommodating space K located between the first supporting spring piece 2031 and the second supporting spring piece 2032. The accommodating space K is a V-shaped space formed by the auxiliary supporting layer 203 facing one side of the flexible display panel 10 after the plurality of first supporting teeth 2031c and the plurality of second supporting teeth 2032c are staggered. The V-shaped space is used to support and accommodate the bent display portion 103 (U-shaped).

Specifically, as shown in Figures 1 and 2, the flexible display panel 10 may include a display function layer 11 and a functional layer that are stacked, the functional layer may include a heat dissipation layer or a stress-reducing support layer 12 that reduces bending stress, and the display function layer 11 may include a flexible OLED display body.

Specifically, the support assembly 20 is disposed on a backlight side of the flexible display panel 10 to drive the flexible display panel 10 to bend.

It should be noted that the display module includes a first flat state and a second folded state. In the second state, the bent display portion 103 is in a bent state;

In a specific embodiment, as shown in FIG. 3 , the support assembly 20 includes a central axis CL, and the support assembly 20 further includes:

A first middle frame shell 2011 and a second middle frame shell 2012, the first middle frame shell 2011 and the first support plate 2013 are integrated, the second middle frame shell 2012 and the second support plate 2014 are integrated, the first middle frame shell 2011 and the second middle frame shell 2012 are both rotated relative to the central axis CL to achieve folding and unfolding of the support assembly 20, and the first middle frame shell 2011 and the second middle frame shell 2012 are specifically rotated around the central axis CL through a hinge assembly.

Specifically, the central axis CL may be a virtual axis or a physical axis.

The hinge assembly is disposed between the first support plate 2013 and the second support plate 2014 . The first middle frame shell 2011 and the second middle frame shell 2012 are assembled to form a receiving groove 208 . The hinge assembly is located in the receiving groove 208 .

As shown in FIG. 6 , the hinge assembly includes a hinge 210 and a first floating plate 2041 and a second floating plate 2042 rotatably connected to the hinge 210:

The hinge 210 includes two sets of rotating components arranged along the central axis CL, and the two rotating components are combined and fixed by a fixed housing 206;

The rotating assembly includes a first gear D1 and a second gear D2, the first gear D1 and the second gear D2 are meshed with each other, and the first gear D1 and the second gear D2 are respectively rotatably connected to the fixed housing 206; the rotating assembly also includes a first rotating member 2091 and a second rotating member 2092, the first rotating member 2091 includes a first extension arm and a first gear portion M1, and the second rotating member 2092 includes a second extension arm and a second gear portion M2; the first gear portion M1 is rotatably connected to the fixed housing 206 and meshed with the first gear D1, the second gear portion M2 is rotatably connected to the fixed housing 206 and meshed with the second gear D2, and the first rotating member 2091 rotates to drive the second rotating member 2092 to rotate synchronously;

In this embodiment, the first floating plate 2041 and the second floating plate 2042 are respectively located on both sides of the central axis CL, the first floating plate 2041 is connected to the first extension arm of the first rotating member 2091 on the same side of the two rotating components, and the two first extension arms support the first floating plate 2041; the second floating plate 2042 is connected to the second extension arm of the second rotating member 2092 on the same side of the two rotating components, and the two second extension arms support the second floating plate 2042, and the first floating plate 2041 and the second floating plate 2042 are rotatably connected through the hinge 210;

The first middle frame shell 2011 is connected to a first sliding member 2071, the first sliding member 2071 is provided with a first sliding groove LC1, the first extension arm is provided with a first sliding portion B1, the first sliding portion B1 extends into the first sliding groove LC1, slides along the extension direction of the first sliding groove LC1, and the first sliding portion B1 of the first rotating member 2091 is rotationally connected to the first sliding member 2071; the second middle frame shell 2012 is connected to a second sliding member 2072, the second sliding member 2072 is provided with a second sliding groove LC2, the second extension arm is provided with a second sliding portion B2, the second sliding portion B2 extends into the second sliding groove LC2, slides along the extension direction of the second sliding groove LC2, and the second sliding portion B2 of the second rotating member 2092 is rotationally connected to the second sliding member 2072;

When the first support plate 2013 and the second support plate 2014 rotate relative to each other, the first support plate 2013 slides and rotates relative to the first floating plate 2041 , and the second support plate 2014 slides and rotates relative to the second floating plate 2042 , so that the first floating plate 2041 , the second floating plate 2042 and the hinge 210 form an avoidance zone.

The support assembly 20 further includes an auxiliary support layer 203, the material of the auxiliary support layer 203 has certain bending properties, and specifically can be a metal or alloy component;

The auxiliary support layer 203 includes a first support spring piece 2031 and a second support spring piece 2032. The first support spring piece 2031 is arranged on the first floating plate 2041, and the second support spring piece 2032 is arranged on the second floating plate 2042. The specific arrangement method includes but is not limited to any one of pasting, welding, screwing, etc. In the embodiment of the present application, the support spring piece and the corresponding floating plate are partially bonded by the frame glue 205 (taking the first support spring piece 2031 as an example, that is, one side of the first support spring piece 2031 away from the first support tooth 2031c is partially connected to the first floating plate 2041 through the frame glue 205). The first floating plate 2041 and the second floating plate 2042 are connected to the first floating plate 2041 and the second floating plate 2042. When the two floating plates 2042 rotate relative to each other, the first supporting spring piece 2031 and the second supporting spring piece 2032 are driven to rotate relative to each other around the central axis CL. When the display module is in the second state, the first supporting plate 2013 and the second supporting plate 2014 are in an overlapping state. The first supporting teeth 2031c of the first supporting spring piece 2031 and the second supporting teeth 2032c of the second supporting spring piece 2032 are staggered, so that the first supporting teeth 2031c and the second supporting teeth 2032c form an accommodating space K. The accommodating space K is formed in the avoidance area, so that the bent display portion 103 is supported by the first supporting teeth 2031c and the second supporting teeth 2032c.

Further, when the display module is in the second state, the first supporting teeth 2031c of the first supporting elastic sheet 2031 and the second supporting teeth 2032c of the second supporting elastic sheet 2032 are staggered. At this time, the ends of the first supporting teeth 2031c and the second supporting teeth 2032c can be freely extended or abutted against the floating plate they are facing, which is specifically related to the length of the supporting teeth crossing the central axis CL;

When the lengths of the first supporting tooth 2031c and the second supporting tooth 2032c are short, the ends of the first supporting tooth 2031c and the second supporting tooth 2032c do not contact the corresponding floating plates and are in a free state without being subjected to force. When the display module is impacted, the end of the first supporting tooth 2031c abuts against the second floating plate 2042 (or the first supporting tooth 2031c is bent by the squeezing force), and the second supporting tooth 2032c abuts against the first floating plate 2041 (or the second supporting tooth 2032c is bent by the squeezing force).

When the lengths of the first supporting tooth 2031c and the second supporting tooth 2032c are long, the avoidance space formed between the ends of the first supporting tooth 2031c and the second supporting tooth 2032c is limited, so that the end of the first supporting tooth 2031c abuts against the second floating plate 2042 (or the first supporting tooth 2031c is bent by the extrusion force), and the second supporting tooth 2032c abuts against the first floating plate 2041 (or the second supporting tooth 2032c is bent by the extrusion force), and is always in a stressed and bent state;

Both of the above-mentioned two states can realize that the first supporting tooth 2031c and the second supporting tooth 2032c form an accommodating space K, and the accommodating space K is formed in the avoidance area, so that the bent display part 103 is supported by the first supporting tooth 2031c and the second supporting tooth 2032c, and further, when the first supporting tooth 2031c and the second supporting tooth 2032c are in a bent state, the spring sheet has a resilience force, which is enough to absorb and store more impact potential energy, thereby preventing the external impact force from being transmitted to the position of the hinge 210 of the display module after the display module is hit, and then transmitting the impact force to the bent display part 103, affecting the normal display of the flexible display panel.

Specifically, the plurality of first supporting teeth 2031c and the plurality of second supporting teeth 2032c are staggered, which means that in the second state, in the extension direction of the central axis CL, the first supporting teeth 2031c and the second supporting teeth 2032c intersect;

Specifically, the first supporting teeth 2031c and the first supporting spring piece 2031 are integrated with each other and made of the same material, the second supporting teeth 2032c and the second supporting spring piece 2032 are integrated with each other and made of the same material, and both the first supporting spring piece 2031 and the second supporting spring piece 2032 may be comb-shaped;

Specifically, in a direction perpendicular to the flexible display panel 10, projections of the first supporting teeth 2031c and the second supporting teeth 2032c each include a trapezoid (FIG. 9), a rectangle (FIG. 12c), a triangle (FIG. 12b) or an arc (FIG. 12a).

It can be understood that the support component 20 of the display module provided in the present application includes a hinge component, and an auxiliary support layer 203 provided on the side of the hinge component close to the flexible display panel 10, the auxiliary support layer 203 includes a first support spring 2031 and a second support spring 2032 provided on the hinge component, the first support spring 2031 and the second support spring 2032 are rotatably connected through the hinge component, a side of the first support spring 2031 close to the second support spring 2032 is provided with a plurality of first support teeth 2031c, and a side of the second support spring 2032 close to the first support spring 2031 is provided with a plurality of second support teeth 2031c. Teeth 2032c; the display module includes a first flat state and a second folded state. In the second state, a plurality of the first supporting teeth 2031c and a plurality of the second supporting teeth 2032c are staggered and bent to embrace each other to form an accommodating space K. The bent display portion 103 is located in the accommodating space K, so that in the second bent state, the display module utilizes the characteristics of the first supporting spring piece 2031 and the second supporting spring piece 2032 that are easy to bend and deform to absorb and store more impact potential energy, thereby preventing the display module from being hit by an external impact force, and the external impact force is transmitted to the position of the hinge component of the display module, causing the hinge component to deform and affect the normal display of the flexible display panel.

In one embodiment, as shown in Figures 1 and 11, the bent display portion 103 includes a first sub-display portion 1031 and a second sub-display portion 1032, respectively located on both sides of the central axis CL, the first sub-display portion 1031 is arranged corresponding to the first supporting spring piece 2031, and the second sub-display portion 1032 is arranged corresponding to the second supporting spring piece 2032, and in the second state, the first sub-display portion 1031 overlaps with at least a portion of the second supporting tooth 2032c, and the second sub-display portion 1032 overlaps with at least a portion of the first supporting tooth 2031c.

Specifically, the boundary between the first sub-display portion 1031 and the second sub-display portion 1032 is based on the central axis CL, the first supporting spring piece 2031 is arranged corresponding to the first sub-display portion 1031, and at least a portion of the first supporting tooth 2031c of the first supporting spring piece 2031 overlaps with the second sub-display portion 1032, the second supporting spring piece 2032 is arranged corresponding to the second sub-display portion 1032, and at least a portion of the second supporting tooth 2032c of the second supporting spring piece 2032 overlaps with the first sub-display portion 1031, and when the display module is in the second state, the embracing structure formed by the first supporting tooth 2031c and the second supporting tooth 2032c (i.e., similar to that shown in Figures 10 and 11, the first supporting tooth 2031c and the second supporting tooth 2032c form an interlaced structure similar to a multi-tooth gripping clamp) is more stable, and therefore has a better supporting effect on the bent display portion 103.

Furthermore, the first supporting tooth 2031c and the second supporting tooth 2032c have the same shape and size. In the first state and the second state of the display module, in the direction along the central axis CL, the first supporting spring piece 2031 and the second supporting spring piece 2032 are symmetrical about the central axis CL.

It can be understood that, in the second state, by arranging the first sub-display portion 1031 to overlap with at least a portion of the second supporting tooth 2032c, and arranging the second sub-display portion 1032 to overlap with at least a portion of the first supporting tooth 2031c, the formed accommodating space K is more matched with the bent display portion 103 in the bent state, so that the effect of dispersing the impact force by the first supporting tooth 2031c and the second supporting tooth 2032c is more uniform.

In one embodiment, as shown in FIGS. 3, 4, 6 and 7, the hinge assembly further comprises a first floating plate 2041 rotatably connected to one side of the hinge 210, and a second floating plate 2042 rotatably connected to the other side of the hinge 210, the first floating plate 2041 is slidably connected to the first support plate 2013, the second floating plate 2042 is slidably connected to the second support plate 2014, and the first floating plate 2041 and the second floating plate 2042 are respectively arranged on both sides of the central axis CL;

The first supporting spring piece 2031 is connected to the first floating plate 2041 at one side close to the first supporting plate 2013 , and the second supporting spring piece 2032 is connected to the second floating plate 2042 at one side close to the second supporting plate 2014 .

Specifically, the first floating plate 2041 is rotatably connected to the hinge 210 via a first rotating member 2091, the first rotating member 2091 is fixedly connected to the first floating plate 2041, the first rotating member 2091 is rotatably connected to the hinge 210 via a gear meshing mode, the second floating plate 2042 is rotatably connected to the hinge 210 via a second rotating member 2092, the second rotating member 2092 is fixedly connected to the second floating plate 2042, the second rotating member 2092 is rotatably connected to the hinge 210 via a gear meshing mode;

A slider is also fixedly provided on the first rotating member 2091, and a slider is also fixedly provided on the second rotating member 2092. The first floating plate 2041 is slidably connected to the first middle frame shell 2011 via the first sliding member 2071, and a sliding groove is provided on the first sliding member 2071. The slider on the first rotating member 2091 slides in the sliding groove on the first sliding member 2071 accordingly. The second floating plate 2042 is slidably connected to the second middle frame shell 2012 via the second sliding member 2072, and a sliding groove is provided on the second sliding member 2072. The slider on the second rotating member 2092 slides in the sliding groove on the second sliding member 2072 accordingly.

Specifically, one side edge of the first supporting spring piece 2031 close to the first supporting plate 2013 is adhered to the surface of the first floating plate 2041 close to the first supporting plate 2013 through the frame glue 205, and one side edge of the second supporting spring piece 2032 close to the second supporting plate 2014 is adhered to the surface of the second floating plate 2042 close to the second supporting plate 2014 through the frame glue 205, and at the same time, the first supporting teeth 2031c and the second supporting teeth 2032c are staggered.

In one embodiment, the first supporting teeth 2031c and the second supporting teeth 2032c have the same structure, and a plurality of the first supporting teeth 2031c and a plurality of the second supporting teeth 2032c are arranged at intervals along the direction of the central axis.

Specifically, the same structure means that the first supporting teeth 2031c and the second supporting teeth 2032c are arranged symmetrically with respect to the central axis CL, and in a top view, the plurality of the first supporting teeth 2031c and the plurality of the second supporting teeth 2032c of the auxiliary supporting layer 203 can be seamlessly spliced.

Specifically, the first supporting teeth 2031c and the second supporting teeth 2032c may be arranged at every other interval (as shown in FIG. 8 ), or may be arranged at every other interval, and the specific interval arrangement manner is not limited;

Furthermore, the first supporting teeth 2031c and the second supporting teeth 2032c are arranged with the same density along the direction of the central axis CL. By arranging the first supporting teeth 2031c and the second supporting teeth 2032c with the same density along the direction of the central axis CL, the first supporting spring piece 2031 and the second supporting spring piece 2032 can share the impact force more evenly.

It can be understood that by arranging the plurality of first supporting teeth 2031c and the plurality of second supporting teeth 2032c at uniform intervals, the impact force transmitted to the bent display portion 103 after the display module is hit can be further effectively dispersed.

According to the above embodiment, as shown in FIG. 6 , in the first state, the first supporting teeth 2031 c and the second supporting teeth 2032 c are engaged with each other, and the projection of the auxiliary supporting layer 203 in a direction perpendicular to the flexible display panel 10 covers the hinge 210 .

Specifically, the meshing of the first supporting teeth 2031c and the second supporting teeth 2032c means that when the display module is in a flattened state, the first supporting teeth 2031c and the second supporting teeth 2032c can be assembled with each other, that is, the shapes of the plurality of first supporting teeth 2031c and the plurality of second supporting teeth 2032c are complementary, so that the first supporting spring pieces 2031 and the second supporting spring pieces 2032 can form an auxiliary supporting layer 203 with no gaps or with small gaps on the entire surface.

Specifically, in the first state, the auxiliary supporting layer 203 covers the first floating plate 2041 and the second floating plate 2042 .

It can be understood that by setting the first supporting teeth 2031c and the second supporting teeth 2032c to be engaged with each other, when the display module is in the first state, the auxiliary supporting layer 203 can provide certain support and reduce creases. When the display module is in the second state, the first supporting teeth 2031c and the second supporting teeth 2032c are staggered and bent to embrace each other to form an accommodating space K (that is, in the direction along the central axis CL, the first supporting teeth 2031c and the second supporting teeth 2032c cross slightly in an X shape, as shown in Figure 11) to accommodate and support the display bending portion, and the first supporting teeth 2031c and the second supporting teeth 2032c themselves play a buffering role through their own bending elasticity.

In one embodiment, as shown in FIG. 9 , in the direction from the first supporting elastic piece 2031 to the second supporting elastic piece 2032 , the width of the first supporting tooth 2031 c gradually decreases;

In the direction from the second supporting elastic piece 2032 to the first supporting elastic piece 2031 , the width of the second supporting tooth 2032 c gradually decreases.

Specifically, the direction from the first supporting spring piece 2031 to the second supporting spring piece 2032 specifically refers to the direction from the connecting end to the free end of the first supporting tooth 2031c (parallel to the first direction F1), and the width of the first supporting tooth 2031c refers to the width in the direction parallel to the center axis CL.

Specifically, the direction from the second supporting spring piece 2032 to the first supporting spring piece 2031 specifically refers to the direction from the connecting end to the free end of the second supporting tooth 2032c (parallel to the first direction F1), and the width of the second supporting tooth 2032c refers to the width in the direction parallel to the center axis CL.

Specifically, in the direction from the first supporting spring piece 2031 to the second supporting spring piece 2032, the material thickness _H2 of the first supporting tooth 2031c may also gradually decrease, and in the direction from the second supporting spring piece 2032 to the first supporting spring piece 2031, the material thickness of the second supporting tooth 2032c may also gradually decrease.

It can be understood that the widths of the first supporting tooth 2031c and the second supporting tooth 2032c are set to gradually decrease. In the process of switching the display module from the first state to the second state, the compression capacity of the first supporting spring piece 2031 and the second supporting spring piece 2032 shows a gradual trend, and the effect of alleviating the impact force gradually increases with the increase of the impact force, which can further improve the impact resistance and buffering performance of the first supporting spring piece 2031 and the second supporting spring piece 2032.

According to the above embodiment, in the direction perpendicular to the flexible display panel 10, the projections of the first supporting teeth 2031c and the second supporting teeth 2032c both include one of a trapezoid (FIG. 9), a triangle (FIG. 12b) or an arc (FIG. 12a).

Specifically, the first supporting teeth 2031c and the second supporting teeth 2032c are preferably trapezoidal.

In one embodiment, as shown in Figures 13a and 13b, Figure 13a or 13b is a schematic diagram of the structure of the first supporting spring piece 2031 or the second supporting spring piece 2032, the first supporting spring piece 2031 and/or the second supporting spring piece 2032 include a first surface S1 and a second surface S2 arranged parallel to each other, the first supporting spring piece 2031 and/or the second supporting spring piece 2032 include at least one connecting portion C3, the connecting portion C3 is arranged between the first surface S1 and the second surface S2, and connects the first surface S1 and the second surface S2, the connecting portion C3 has a first angle with the first surface S1, and the connecting portion C3 has a second angle with the second surface S2, so that the first supporting spring piece 2031 and/or the second supporting spring piece 2032 have a staggered concave-convex structure in the first direction F1, and the first direction F1 is perpendicular to the central axis CL.

It should be noted that in order to further improve the bending performance of the first supporting spring piece 2031 and the second supporting spring piece 2032 , store more elastic potential energy, and achieve better impact resistance and buffering effects, the technical solution of this embodiment is provided.

Specifically, in this embodiment, the first surface S1 and the second surface S2 may be virtual surfaces.

In the above embodiment, as shown in Figure 13b, the first supporting spring piece 2031 and/or the second supporting spring piece 2032 include at least two first horizontal portions P1 flush with the first surface S1 and at least one second horizontal portion P2 flush with the second surface S2, and in the first direction F1, the first horizontal portions P1 and the second horizontal portions P2 are alternately arranged, and the first horizontal portions P1 and the second horizontal portions P2 are connected by the connecting portion C3.

It can be understood that by configuring the first supporting spring piece 2031 and/or the second supporting spring piece 2032 to include a first horizontal portion and a second horizontal portion, the flexible display panel can be better supported to avoid interference with the screen body.

Specifically, the first supporting spring piece 2031 and the second supporting spring piece 2032 form a bending structure in the thickness direction, and the first horizontal portion P1, the second horizontal portion P2 and the connecting portion C3 are all integrally formed structures, which can be formed by a bending process or a stamping process;

Specifically, the first horizontal portion P1 and the second horizontal portion P2 of the first supporting spring piece 2031 are parallel to each other, that is, the first horizontal portion P1 and the second horizontal portion P2 are not on the same horizontal plane, and a connecting portion C3 is provided between the first horizontal portion P1 and the second horizontal portion P2, and the connecting portion C3 forms a first angle with the first horizontal portion P1 and a second angle with the second horizontal portion P2, the first angle and the second angle have the same degree, and the range of the first angle or the second angle α is 90°~120°, and can specifically be any one of 90°, 110°, and 120°, without specific limitation, and the second supporting spring piece 2032 has a similar structure to the first supporting spring piece 2031.

Specifically, on the first supporting spring piece 2031, the first horizontal portion P1, the second horizontal portion P2, and the connecting portion C3 are repeatedly arranged in sequence along the first direction F1 in the order of the first horizontal portion P1, the connecting portion C3, the second horizontal portion P2, the connecting portion C3, and the first horizontal portion P1, so that the first supporting spring piece 2031 forms a structure with a bend, and its bending direction is parallel to the center axis CL.

Specifically, on the second supporting spring piece 2032, the first horizontal portion P1, the second horizontal portion P2, and the connecting portion C3 are repeatedly arranged in sequence along the first direction F1 in the order of the first horizontal portion P1, the connecting portion C3, the second horizontal portion P2, the connecting portion C3, and the first horizontal portion P1, so that the second supporting spring piece 2032 forms a structure with a bend, and its bending direction is parallel to the center axis CL.

Specifically, the heights of the multiple support portions and the degrees of the first angle or the second angle α formed by the multiple support portions and the first horizontal portion P1/the second horizontal portion P2 may be different, that is, the vertical distance between the multiple first horizontal portions P1 and the multiple second horizontal portions P2 may have multiple values, the multiple first horizontal portions P1 may have multiple width values _L1 , and the multiple second horizontal portions P2 may have multiple width values _L2 . There is no specific limitation. The bending structures that can enhance the elastic potential energy of the first supporting spring piece 2031 and the second supporting spring piece 2032 are all within the protection scope of the present application. In the present application, the example that the widths _L1 of the multiple first horizontal portions P1 are all equal, the widths _L2 of the multiple second horizontal portions P2 are all equal, and the degrees of the preset angles α formed by the multiple support portions and the first horizontal portion P1/the second horizontal portion P2 are all equal is used for explanation.

Specifically, the first supporting spring piece 2031 and the second supporting spring piece 2032 can be formed by a bending process or a stamping process to simultaneously form the first horizontal portion P1, the second horizontal portion P2 and the connecting portion C3, so that the first supporting spring piece 2031 and the second supporting spring piece 2032 present a bending structure in the first direction F1, thereby making the supporting spring pieces have better elastic deformation ability and buffering performance.

Specifically, the thickness H1 of the overall structure of the first supporting spring piece 2031 or the second supporting spring piece 2032 is in the range of 30um-50um, and specifically can be any one of 30um, 35um, 38um, 40um, 42um, 45um, 47um, and 50um.

According to the above embodiment, as shown in FIG. 13b , in order to ensure that the first supporting spring piece 2031 and the second supporting spring piece 2032 have certain support in the thickness direction and are easy to bend, in the first direction F1, the ratio of the width _L1 of the first horizontal portion P1 to the width L of the first supporting spring piece 2031 is 0.2-0.25, and can be any one of 0.2, 0.21, 0.22, 0.23, 0.24, and 0.25;

The ratio of the width _L2 of the second horizontal portion P2 to the width L of the first supporting spring 2031 is 0.2-0.25, and specifically can be any one of 0.2, 0.21, 0.22, 0.23, 0.24, and 0.25.

According to the above embodiment, the thickness of the first horizontal portion P1, the second horizontal portion P2 and the connecting portion C3 are the same, and the ratio of the thickness H2 of the first horizontal portion P1 (the thickness of the second horizontal portion is also H2, and the thickness of the connecting portion is also H2) to the maximum thickness H1 of the first supporting spring piece 2031 in the thickness direction is 0.3~0.5, and can specifically be any one of 0.3, 0.35, 0.37, 0.42, 0.46, and 0.5.

The thickness of the first horizontal portion P1 , the second horizontal portion P2 , and the connecting portion C3 specifically refers to the material thickness of the first horizontal portion P1 , the second horizontal portion P2 , and the connecting portion C3 .

Specifically, the thickness direction refers to a direction perpendicular to the auxiliary supporting layer 203 .

It can be understood that by setting the first supporting spring piece 2031 and the second supporting spring piece 2032 to include at least two first horizontal parts P1, at least two second horizontal parts P2, and at least three connecting parts C3, the first horizontal parts P1, the connecting parts C3 and the second horizontal parts P2 are arranged alternately in sequence along the first direction F1, which can effectively enhance the elastic deformation ability and buffering performance of the first supporting spring piece 2031 and the second supporting spring piece 2032, so as to absorb and store more impact potential energy, thereby avoiding external impact force from being transmitted to the position of the bent display part 103, thereby achieving the purpose of protecting the flexible display screen. At the same time, this setting method can also provide certain support when the display module is in the first unfolded state, reduce the creases generated after the flexible display screen is bent multiple times, and improve the display effect of the display module.

In one embodiment, in the first direction F1, the width _L1 of the first horizontal portion P1 is equal to the width _L2 of the second horizontal portion P2, and the width _L1 of the first horizontal portion P1 is smaller than the length of the first supporting tooth 2031c or the second supporting tooth 2032c.

Specifically, the length of the first supporting tooth 2031c refers to the length from the connecting end to the free end of the supporting tooth in the first direction F1.

It can be understood that setting the width _L1 of the first horizontal portion P1 to be smaller than the length of the first supporting tooth 2031c or the second supporting tooth 2032c can further enhance the elastic deformation capacity and buffering performance of the first supporting tooth 2031c and the second supporting tooth 2032c, thereby absorbing and storing more impact potential energy, thereby avoiding external impact force from being transmitted to the position of the bent display portion 103, thereby achieving the purpose of protecting the flexible display screen. At the same time, this setting method can also provide certain support when the display module is in the first unfolded state, reduce the creases generated after the flexible display screen is bent multiple times, and enhance the display effect of the display module.

In one embodiment, as shown in FIGS. 14 and 15 , the flexible display panel 10 includes a display function layer 11 and a stress reduction support layer 12 which are stacked, the stress reduction support layer 12 being disposed on a side of the display function layer 11 facing the support assembly 20, and the stress reduction support layer 12 including a bending portion FA corresponding to the hinge assembly and two non-bending portions FN located on both sides of the bending portion FA and corresponding to the first support plate 2013 and the second support plate 2014;

The bending portion FA includes two first sub-portions A1 and a second sub-portion A2 located between the two first sub-portions A1, the second sub-portion A2 is arranged corresponding to the central axis CL, a plurality of penetrating stress reducing holes 1202 are arranged on the second sub-portion A2, and a plurality of stress reducing blind holes 1201 are arranged on the first sub-portion A1.

The second sub-portion A2 at least covers the first supporting tooth 2031c and the second supporting tooth 2032c, and the orthographic projection of the bending portion FA on the display function layer 11 is located within the orthographic projection of the auxiliary supporting layer 203 on the display function layer 11.

Specifically, the opening of the stress reducing blind hole 1201 faces the supporting assembly 20;

Specifically, the stress reducing holes 1202 are preferably in the shape of long strips, the length direction of the stress reducing holes 1202 is parallel to the central axis CL, and the plurality of stress reducing holes 1202 are arranged alternately with each other;

Specifically, the stress reducing blind hole 1201 may be a long groove, and the length direction of the long groove is parallel to the central axis CL.

Specifically, the area and shape of the stress reducing support layer 12 are the same as those of the display function layer 11 , that is, the stress reducing support layer 12 and the display function layer 11 are overlapped.

It can be understood that by setting the stress reducing support layer 12, the bending stress of the bending section can be dispersed when the display module is bent, thereby alleviating the bending stress of the display module and extending the service life of the display module. The second sub-portion A2 is set to at least cover the first supporting tooth 2031c and the second supporting tooth 2032c to prevent the second sub-portion A2 of the stress reducing support layer 12 from interfering with the auxiliary supporting layer 203 when bending, thereby affecting the buffering effect of the auxiliary supporting layer 203. The orthographic projection of the bending portion FA on the display function layer 11 is set to be within the orthographic projection of the auxiliary supporting layer 203 on the display function layer 11, thereby ensuring that the edge portion of the auxiliary supporting layer 203 is in flat contact with the stress reducing support layer 12 and improving the consistency of the overall display module.

The present application also provides a support assembly 20, comprising:

A first supporting plate 2013;

A second supporting plate 2014;

A hinge assembly, one side of which is rotatably connected to the first support plate 2013 around a central axis CL, and the other side of which is rotatably connected to the second support plate 2014 around the central axis CL, and the first support plate 2013 and the second support plate 2014 are rotatably connected via the hinge assembly;

The support assembly 20 further includes an auxiliary support layer 203, the auxiliary support layer 203 includes a first support spring piece 2031 and a second support spring piece 2032 arranged on the hinge assembly, the first support spring piece 2031 and the second support spring piece 2032 are rotatably connected through the hinge assembly, a side of the first support spring piece 2031 close to the second support spring piece 2032 is provided with a plurality of first support teeth 2031c, and a side of the second support spring piece 2032 close to the first support spring piece 2031 is provided with a plurality of second support teeth 2032c;

When the first support plate 2013 and the second support plate 2014 are switched from the flat state to the folded state, the plurality of first support teeth 2031c and the plurality of second support teeth 2032c are alternately arranged.

Specifically, the specific structure, material, properties and connection relationship of the support assembly 20 can be found in the above embodiments, and will not be described in detail here.

In summary, it can be understood that the present application provides a support component 20 of the display module, including a hinge component, and an auxiliary support layer 203 provided on the hinge component close to the side of the flexible display panel 10, wherein the auxiliary support layer 203 includes a first support spring 2031 and a second support spring 2032 provided on the hinge component, wherein the first support spring 2031 and the second support spring 2032 are rotatably connected through the hinge component, and a plurality of first support teeth 2031c are provided on a side of the first support spring 2031 close to the second support spring 2032, and a plurality of second support teeth 2031c are provided on a side of the second support spring 2032 close to the first support spring 2031. Two supporting teeth 2032c; the display module includes a first flat state and a second folded state. In the second state, multiple first supporting teeth 2031c and multiple second supporting teeth 2032c are staggered and bent to form an accommodating space K. The bent display portion 103 is located in the accommodating space K, so that the display module, in the second bent state, utilizes the characteristics of the first supporting spring piece 2031 and the second supporting spring piece 2032 that are easy to bend and deform to absorb and store more impact potential energy, thereby preventing the display module from being hit by an external impact force, and the external impact force is transmitted to the position of the hinge component of the display module, causing the hinge component to deform and affect the normal display of the flexible display panel.

It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present application, and all these changes or substitutions should fall within the protection scope of the claims attached to the present application.

Claims (20)

1. A display module, comprising:

   A flexible display panel, comprising a first planar display portion, a second planar display portion, and a bent display portion located between the first planar display portion and the second planar display portion;

   A support assembly, arranged on a non-luminous surface side of the flexible display panel, the support assembly comprising a first support plate, a second support plate and a hinge assembly, the first support plate being rotatably connected to one side of the hinge assembly around a central axis, the second support plate being rotatably connected to the other side of the hinge assembly around the central axis, the first support plate and the second support plate being rotatably connected via the hinge assembly, the first planar display portion being arranged on the first support plate, and the second planar display portion being arranged on the second support plate;

   Wherein, the support assembly includes an auxiliary support layer arranged on a side of the hinge assembly close to the flexible display panel, the auxiliary support layer includes a first support spring sheet and a second support spring sheet arranged on the hinge assembly, the first support spring sheet and the second support spring sheet are rotatably connected through the hinge assembly, a side of the first support spring sheet close to the second support spring sheet is provided with a plurality of first support teeth, a side of the second support spring sheet close to the first support spring sheet is provided with a plurality of second support teeth, and the plurality of first support teeth and the plurality of second support teeth are staggered;

   The display module includes a first flat state and a second folded state. In the second state, the bent display portion is in a bent state. The display module includes a accommodating space located between the first supporting spring sheet and the second supporting spring sheet, and the bent display portion is located in the accommodating space.
2. The display module as described in claim 1, wherein the bent display portion includes a first sub-display portion and a second sub-display portion respectively located on both sides of the central axis, the first sub-display portion is arranged corresponding to the first supporting spring piece, and the second sub-display portion is arranged corresponding to the second supporting spring piece, and in the second state, the first sub-display portion overlaps with at least a portion of the second supporting tooth, and the second sub-display portion overlaps with at least a portion of the first supporting tooth.
3. The display module according to claim 2, wherein the hinge assembly further comprises a first floating plate rotatably connected to one side of the hinge, a second floating plate rotatably connected to the other side of the hinge, the first floating plate is slidably connected to the first support plate, the second floating plate is slidably connected to the second support plate, and the first floating plate and the second floating plate are respectively arranged on both sides of the central axis;

   Wherein, a side edge of the first supporting elastic sheet close to the first supporting plate is connected to the first floating plate, and a side edge of the second supporting elastic sheet close to the second supporting plate is connected to the second floating plate.
4. The display module according to claim 3, wherein in the second state, the first supporting teeth are bent and abutted against the second floating plate, and the second supporting teeth are bent and abutted against the first floating plate.
5. The display module as described in claim 2, wherein the first supporting spring sheet and/or the second supporting spring sheet include a first surface and a second surface arranged parallel to each other, the first supporting spring sheet and/or the second supporting spring sheet include at least one connecting portion, the connecting portion is arranged between the first surface and the second surface, and connects the first surface and the second surface, the connecting portion has a first angle with the first surface, and the connecting portion has a second angle with the second surface, so that the first supporting spring sheet and/or the second supporting spring sheet present a staggered concave-convex structure in a first direction, and the first direction is perpendicular to the central axis.
6. The display module as described in claim 5, wherein the first supporting spring sheet and/or the second supporting spring sheet includes at least two first horizontal portions flush with the first surface and at least one second horizontal portion flush with the second surface, and in the first direction, the first horizontal portions and the second horizontal portions are alternately arranged, and the first horizontal portions and the second horizontal portions are connected by the connecting portion.
7. The display module according to claim 6, wherein in the first direction, the widths of the first horizontal portion and the second horizontal portion are equal, and the width of the first horizontal portion is smaller than the length of the first supporting tooth or the second supporting tooth.
8. The display module according to claim 6, wherein, in the first direction, the ratio of the width of the first horizontal portion to the width of the first supporting spring is 0.2-0.25, and the ratio of the width of the second horizontal portion to the width of the second supporting spring is 0.2-0.25.
9. The display module according to claim 6, wherein the first horizontal portion, the second horizontal portion and the connecting portion have the same thickness, and a ratio of the thickness of the first horizontal portion to the distance between the first surface and the second surface is 0.3-0.5.
10. The display module according to claim 2, wherein, in the first state, the first supporting tooth and the second supporting tooth are engaged, and a projection of the auxiliary supporting layer in a direction perpendicular to the flexible display panel covers the hinge.
11. The display module according to claim 2, wherein the width of the first supporting tooth gradually decreases in a direction from the first supporting elastic piece to the second supporting elastic piece;

    In a direction from the second supporting elastic piece to the first supporting elastic piece, the width of the second supporting tooth gradually decreases.
12. The display module according to claim 11, wherein in a direction perpendicular to the flexible display panel, projections of the first supporting teeth and the second supporting teeth each include one of a trapezoid, a triangle or an arc.
13. The display module according to claim 2, wherein the thickness of the first supporting tooth gradually decreases in a direction from the first supporting spring piece to the second supporting spring piece;

    In a direction from the second supporting elastic piece to the first supporting elastic piece, the thickness of the second supporting tooth gradually decreases.
14. The display module as described in claim 1, wherein, in the first state, edges of the plurality of first supporting teeth and edges of the plurality of second supporting teeth are seamlessly spliced, and the plurality of first supporting teeth and the plurality of second supporting teeth are alternately arranged in the direction along the central axis.
15. The display module according to claim 1, wherein the flexible display panel comprises a display function layer and a stress reduction support layer which are stacked, the stress reduction support layer is arranged on a side of the display function layer facing the support assembly, and the stress reduction support layer comprises a bending portion corresponding to the hinge assembly and two non-bending portions located on both sides of the bending portion and corresponding to the first support plate and the second support plate;

    The bending portion includes two first sub-portions and a second sub-portion located between the two first sub-portions, the second sub-portion is arranged corresponding to the central axis, a plurality of penetrating stress-reducing holes are arranged on the second sub-portion, and a plurality of stress-reducing blind holes are arranged on the first sub-portion;

    The second sub-portion at least covers the first supporting tooth and the second supporting tooth, and the orthographic projection of the bent portion on the display function layer is located within the orthographic projection of the auxiliary supporting layer on the display function layer.
16. The display module according to claim 15, wherein the stress reducing blind hole is a long groove, and the length direction of the long groove is parallel to the central axis.
17. The display module according to claim 1, wherein the first supporting spring sheet and the second spring sheet are both integrated structures, and the first supporting spring sheet and the second spring sheet are made of the same material, including metal or alloy.
18. A support assembly, comprising:

    a first support plate;

    a second support plate;

    A hinge assembly, one side of which is rotatably connected to the first support plate around a central axis, and the other side of which is rotatably connected to the second support plate around the central axis, wherein the first support plate and the second support plate are rotatably connected via the hinge assembly;

    Wherein, the support assembly further includes an auxiliary support layer, the auxiliary support layer includes a first support spring sheet and a second support spring sheet arranged on the hinge assembly, the first support spring sheet and the second support spring sheet are rotatably connected through the hinge assembly, a side of the first support spring sheet close to the second support spring sheet is provided with a plurality of first support teeth, and a side of the second support spring sheet close to the first support spring sheet is provided with a plurality of second support teeth;

    When the first support plate and the second support plate switch from a flat state to a folded state, the plurality of first support teeth and the plurality of second support teeth are arranged alternately.
19. The support assembly of claim 18, wherein:

    The hinge assembly further comprises a first floating plate rotatably connected to one side of the hinge, and a second floating plate rotatably connected to the other side of the hinge, the first floating plate being slidably connected to the first support plate, the second floating plate being slidably connected to the second support plate, and the first floating plate and the second floating plate being respectively arranged on both sides of the central axis;

    Wherein, a side edge of the first supporting spring sheet close to the first supporting plate is connected to the first floating plate, and a side edge of the second supporting spring sheet close to the second supporting plate is connected to the second floating plate.
20. The support assembly according to claim 19, wherein, in the folded state, the first support tooth is in curved abutment with the second floating plate, and the second support tooth is in curved abutment with the first floating plate.