Supporting assembly, display module and display device

Abstract

The utility model discloses a supporting assembly, a display module and a display device. The supporting assembly comprises a supporting layer which is located on the backlight side of the screen and connected with the screen. Comprising a first hollow area perpendicular to the screen; the supporting layer is arranged to be bent along the bending center line of the supporting layer, so that the screen is switched between an unfolded state and a bent state; in the plane of the supporting layer, the first hollow area is located on one side of the bending center line; the heat dissipation piece comprises a fixed end and a movable end which are oppositely arranged, the fixed end is connected with the supporting layer, the movable end penetrates through the first hollow area, one of the fixed end and the movable end is located on the side, close to the screen, of the supporting layer, and the other end is located on the side, away from the screen, of the supporting layer; the orthographic projection, on the supporting layer, of the heat dissipation piece and the orthographic projection, on the supporting layer, of the bending center line are overlapped, and the movable end is arranged to move along with state switching of the screen.

Description

TECHNICAL FIELD

[0001] The present document relates to, but is not limited to, display technology, in particular to a support assembly, a display module and a display device. BACKGROUND

[0002] The folding screen is an application form of the flexible display panel. For the display panel of the folding screen, a support assembly needs to be arranged below the screen. The support assembly should not only provide support to the screen in the unfolded state and the folded state, but also should have certain heat dissipation capacity to ensure the normal work of the screen. CONTENT OF THE UTILITY MODEL

[0003] In a first aspect, the utility model provides a support assembly, comprising: a support layer, located at the backlight side of a screen and connected with the screen; a first hollow area arranged perpendicularly to the screen; the support layer is arranged to be folded along a folding center line of the support layer, so that the screen is switched between an unfolded state and a folded state; in the plane of the support layer, the first hollow area is located on one side of the folding center line; a heat dissipation piece comprising a fixed end and a movable end, the fixed end is arranged to be connected with the support layer, the movable end passes through the first hollow area, so that one end of the fixed end and the movable end is located on one side of the support layer close to the screen, and the other end is located on the other side of the support layer away from the screen; wherein the orthogonal projection of the heat dissipation piece on the support layer and the orthogonal projection of the folding center line on the support layer overlap with each other, and the movable end is arranged to move with the state switching of the screen.

[0004] In an example embodiment, the support layer comprises a through hole area, the through hole area comprises a plurality of through holes penetrating through the support layer, the orthogonal projection of the folding center line on the support layer and the orthogonal projection of the through hole area on the support layer overlap with each other; in the plane of the support layer, the first hollow area is located on one side of the through hole area along a first direction, the folding center line extends along a second direction, and the first direction and the second direction intersect; the orthogonal projection of the heat dissipation piece on the support layer.

[0005] In an example embodiment, the support layer further comprises a first blind hole area and a second blind hole area, the first blind hole area and the second blind hole area comprise a plurality of blind holes; the first blind hole area and the second blind hole area are respectively located on both sides of the through hole area along the first direction; in the plane of the support layer, the first hollow area is located on one side of the first blind hole area or the second blind hole area away from the through hole area, and the orthogonal projection of the heat dissipation piece on the support layer and the orthogonal projection of the through hole area, the first blind hole area and the second blind hole area on the support layer all overlap with each other.

[0006] In an example embodiment, the support layer is connected to the screen through a first adhesive layer, the first adhesive layer comprises a second hollow area arranged perpendicularly to the screen, a normal projection of the first hollow area on the support layer and a normal projection of the second hollow area on the support layer overlap with each other, and the heat dissipation member located on a side of the support layer away from the screen is located in the second hollow area.

[0007] In an example embodiment, the fixed end is located on a side of the support layer close to the screen, and the fixed end is connected to a surface of the support layer away from the screen through a second adhesive layer.

[0008] In an example embodiment, in a direction perpendicular to the support layer, a thickness of the heat dissipation member located on a side of the support layer close to the screen is greater than a thickness of the heat dissipation member located on a side of the support layer away from the screen.

[0009] In an example embodiment, the fixed end is located on a side of the support layer close to the screen and in the second hollow area, and the fixed end is connected to the support layer through a third adhesive layer.

[0010] In an example embodiment, the fixed end is connected to the screen through a fourth adhesive layer in the second hollow area.

[0011] In an example embodiment, the fixed end is located on a side of the support layer close to the screen, and the first adhesive layer comprises a base material and first and second sub-adhesive layers arranged on two sides of the base material, the first sub-adhesive layer is arranged to be connected to the support layer, and the second sub-adhesive layer is arranged to be connected to the screen, part of the base material of the first adhesive layer is removed in the second hollow area, the fixed end extends into the first adhesive layer from which the base material is removed, and is connected to the first and second sub-adhesive layers.

[0012] In an example embodiment, the heat dissipation member comprises a graphite material.

[0013] In a second aspect, the utility model provides a display module, comprising: a screen and a support assembly as described above, the support assembly is arranged on the back light side surface of the screen.

[0014] In an example embodiment, the screen comprises a display substrate, a polarizer and a cover plate arranged in sequence, and the display substrate is connected to the support assembly.

[0015] In an example embodiment, further comprising a hinge structure, the hinge structure is located on a side of the heat dissipation member away from the screen and is in contact with the heat dissipation member.

[0016] In an example embodiment, a projection of a position where the hinge structure contacts the heat dissipation member on the support assembly overlaps at least one of the through-hole region, the first blind hole region, and the second blind hole region.

[0017] In a third aspect, the utility model discloses a display device, comprising the support assembly as described above, or comprising the display module as described above.

[0018] The other advantages of the utility model can be realized and obtained through the scheme described in the specification and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings are used to provide the understanding of the technical scheme of the utility model, and constitute a part of the specification, and are used together with the embodiments of the utility model to explain the technical scheme of the utility model, and do not constitute the limitation to the technical scheme of the utility model.

[0020] Figure 1 It is a top view of a display module;

[0021] Figure 2 It is Figure 1 It is a sectional view along AA direction of the support assembly in the support assembly;

[0022] Figure 3 It is a top view of the support assembly in an example embodiment;

[0023] Figure 4 It is a sectional view along AA direction in the example embodiment; Figure 3

[0024] Figure 5 It is a bottom view of the support assembly in the example embodiment; Figure 3

[0025] Figure 6 It is a top view of the support assembly in another example embodiment;

[0026] Figure 7 It is a sectional view along AA direction in the example embodiment; Figure 6

[0027] Figure 8 It is a schematic diagram of position change of the movable end of the display module before and after bending in the example embodiment;

[0028] Figure 9 It is a schematic diagram of position change of the movable end of the display module before and after bending in another example embodiment. DETAILED DESCRIPTION

[0029] ​​​The utility model describes a plurality of embodiments, but this description is exemplary, and not restrictive, and for the ordinary skilled in the art, there can be more embodiments and implementation schemes within the scope of the embodiments described in the utility model. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment can be used in combination with any other feature or element of any other embodiment, or can replace any other feature or element of any other embodiment.

[0030] The utility model includes and envisions the combination with the features and elements known to the ordinary skilled in the art. The embodiments, features and elements disclosed in the utility model can also be combined with any conventional features or elements to form the unique invention scheme defined by the claims. Any feature or element of any embodiment can also be combined with features or elements from other invention schemes to form another unique invention scheme defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in the utility model can be realized individually or in any appropriate combination. Therefore, except for the limitation made according to the appended claims and their equivalent replacements, the embodiments are not limited otherwise. In addition, various modifications and changes can be made within the protection scope of the appended claims.

[0031] In addition, in describing representative embodiments, the specification can have presented method and / or process steps in a particular order. However, to the extent possible under the law, the method or process should not be limited to the particular order in which the steps are presented. Other steps can be performed in between, after, or before the steps presented in the specification, as will be understood by those of ordinary skill in the art. Therefore, the particular order in which the steps are presented in the specification is not an absolute limitation on the claims. In addition, the claims should not be limited to the steps of the method and / or process presented in the specification, as one of ordinary skill in the art will be able to make modifications and / or improvements thereto, and still remain within the scope of the present invention.

[0032] In the drawings, the size, the thickness of layer, or the area of one or a plurality of constituent elements is sometimes exaggerated for the sake of clarity. Thus, one embodiment of the present application is not necessarily limited to that illustrated in the drawings. The shapes and the dimensions of one or a plurality of components in the drawings do not reflect actual ones. In addition, the drawings show schematic examples, and one embodiment of the present application is not limited to the shapes or numerical values shown in the drawings.

[0033] The ordinal numbers, such as "first", "second", "third", and the like, in the present specification are provided for the purpose of avoiding confusion of components, and are not intended to be limiting in terms of quantity. In the present application, "a plurality of" means two or more in number.

[0034] In the present specification, the words of indicating directions or positional relationships, such as "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, used to describe the positional relationship of components with reference to the drawings are merely intended to facilitate the description of the present application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. The positional relationship of the components is appropriately changed according to the direction of the components described. Therefore, it is not limited to the words described in the specification, and can be appropriately changed according to the situation.

[0035] In the present specification, unless explicitly specified and limited otherwise, the terms "mounting", "connection", "connecting" should be understood broadly. For example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate piece, or the communication between two elements inside. For those skilled in the art, the meaning of the above terms in the present application can be understood according to the situation. Among them, "electrically connected" includes the case where the components are connected together through an element having a certain electrical effect. The "element having a certain electrical effect" is not particularly limited as long as it can transmit electrical signals between the connected components. Examples of "element having a certain electrical effect" include not only electrodes and wires, but also switching elements such as transistors, resistors, inductors, capacitors, other elements with various functions, and the like.

[0036] In the present specification, "parallel" means that the angle formed by two straight lines is -10° or more and 10° or less, so it also includes the case where the angle is -5° or more and 5° or less. In addition, "perpendicular" means that the angle formed by two straight lines is 80° or more and 100° or less, so it also includes the case where the angle is 85° or more and 95° or less.

[0037] The embodiments of the present application will be described in detail below with reference to the drawings.

[0038] Figure 1 It is a top view of a display module. As shown in Figure 1 The display module includes a screen 1 and a support assembly 2, the screen 1 includes a light-out side surface and a backlight side surface, the light-out side surface is used for displaying a picture, the backlight side surface is connected with the support assembly 2, Figure 1The screen 1 in the unfolded state is shown from the backlight side. The plane in which the first direction X and the second direction Y lie is the plane in which the screen lies in the unfolded state, and the first direction X and the second direction Y intersect each other, for example, the first direction X and the second direction Y can be perpendicular to each other. The display module includes a folding center line O extending along the second direction Y, Figure 1 The display module can be folded along the folding center line O, so that the two ends of the screen 1 along the first direction X are close to each other, and switched to a folded state. The display module can include an inner folding state and an outer folding state. In the process of switching from the unfolded state to the inner folding state, the surfaces of the screen 1 on both sides of the folding center line O move towards each other, and the screen 1 is located on the inner side of the display module after folding. In the process of switching from the unfolded state to the outer folding state, the surfaces of the screen 1 on both sides of the folding center line O move away from each other, and the screen 1 is located on the outer side of the display module after folding.

[0039] As shown in Figure 1 , the size of the screen 1 in the first direction X can be greater than the size of the support assembly 2 in the first direction X, for example, the screen 1 and the support assembly 2 can be axisymmetric along the center line O. The size of the screen 1 and the support assembly 2 in the second direction Y can be the same. The support assembly 2 includes a through-hole region 210 and a blind hole region 220 extending along the second direction Y, and the folding center line O is located in the through-hole region 210, and a plurality of through holes penetrating the support assembly 2 are provided in the through-hole region 210. The blind hole region 220 is located on both sides of the through-hole region 210 along the first direction X, and a plurality of blind holes are provided. In the folded state of the display module, the support assembly 2 near the folding center line O will be folded, and the internal stress accumulated here is large. By providing the through-hole region 210 near the folding center line O, the display module can be more easily folded, which helps the folding process to proceed smoothly. The position near the through-hole region 210 needs to withstand a large deformation, and by providing the blind hole region 220, the support assembly 2 can have a certain mechanical strength, and the plurality of through holes and blind holes can play a role in releasing stress, which helps to prolong the service life of the support assembly 2 and the display module.

[0040] Figure 2 The support assembly in Figure 1 is shown from the AA direction. As shown in Figure 2As shown, the third direction Z can be a direction perpendicular to the display module in the unfolded state, the "direction perpendicular to the screen" and the "direction perpendicular to the support layer" mentioned in the utility model all represent the third direction Z, and the "plane of the support layer" represents the plane of the support layer in the unfolded state of the screen. The support assembly 2 can include a support layer 21 and a heat dissipation piece 22, the support layer 21 can be connected with the screen 1 through a first adhesive layer 23, and the first adhesive layer 23 can be coated on the whole surface of the support layer 21. The heat dissipation piece 22 is located on the side of the support layer 21 away from the screen 1, and the heat dissipation piece 22 can be connected with the support layer 21 through a second adhesive layer 24, the second adhesive layer 24 can avoid the through hole area 210 and the blind hole area 220, for example, the second adhesive layer 24 can paste the two side edges of the heat dissipation piece 22 along the first direction X on the support layer 21, and the middle part of the heat dissipation piece 22 can not be provided with adhesive, so that the display module is conveniently bent. The first adhesive layer 23 can be fluorinated ethylene propylene (FEP) glue, and the second adhesive layer 24 can be pressure sensitive adhesive (PSA).

[0041] In Figure 2 In the scheme shown, the heat dissipation piece 22 is pasted on the side of the support layer 21 away from the screen 1, which occupies a large space of the whole machine, and is not conducive to the thickness reduction of the display module. Moreover, the heat dissipation piece 22 is fixed on the support layer 21 on both sides along the first direction X, and the heat dissipation piece 22 has a risk of breaking after being bent with the display module.

[0042] The utility model embodiment provides a kind of support assembly, comprising:

[0043] Support layer, located the backlight side of screen, and connect with the screen;Including the first hollow area being arranged perpendicularly to the screen;The support layer is set to bend along the bending center line of itself, so that the screen is switched between unfolded state and bent state;In the plane of the support layer, the first hollow area is located on the side of the bending center line;

[0044] Heat dissipation piece, including fixed end and movable end, the fixed end is set to connect with the support layer, and the movable end passes through the first hollow area, so that one end of the fixed end and the movable end is located on the side of the support layer close to the screen, and the other end is located on the side of the support layer away from the screen;

[0045] Wherein, the orthographic projection of the heat dissipation piece on the support layer and the orthographic projection of the bending center line on the support layer are mutually overlapped, and the movable end is set to move with the state switching of the screen.

[0046] The support component provided in this embodiment of the utility model, by creating a first hollow area in the support layer, allows the heat sink to pass through the first hollow area and overlap with the bending center line. This reduces the space occupied by the heat sink, facilitating thinning of the display module. By designing the movable end of the heat sink to move with the screen's state changes, stress on the heat sink during bending can be effectively released, preventing breakage and extending the lifespan of both the heat sink and the display module, thus improving bending quality. Furthermore, the heat sink is closer to the heat source of the display module, resulting in better heat dissipation efficiency.

[0047] Figure 3 This is a top view of a support component in an exemplary embodiment, illustrating the surface of the support component away from screen 1. Figure 4 In an exemplary embodiment Figure 3 A sectional view along direction AA. Figure 5 In an exemplary embodiment Figure 3 The bottom view of the support component shows the surface of the support component 2 near the screen 1. Combined with... Figures 3 to 5 As shown, the support component 2 includes a support layer 21 and a heat sink 22. The support layer 21 is located on one side of the screen (not shown) and is connected to the screen. The support layer 21 includes a through-hole area 210 extending along the second direction Y and a first hollow area 230. The through-hole area 210 includes a plurality of through holes penetrating the support layer 21. At least a portion of the orthographic projection of the bending center line O onto the support layer 21 falls within the through-hole area 210. The support layer 21 within the first hollow area 230 is removed, forming a hollow structure in the third direction Z of the support layer 21. The heat sink 22 includes a fixed end 22A and a movable end 22B disposed opposite to each other along the first direction X. The fixed end 22A can be located on the side of the support layer 21 closer to the screen and connected to the support layer 21. The movable end 22B passes through the first hollow area 230 and is located on the side of the support layer 21 away from the screen. The heat sink 22 and the bending center line O overlap each other. The movable end 22B can move as the display module switches between the unfolded state and the bent state. The movable end 22B can be located on the side of the through-hole area 210 away from the first hollow area 230, and the fixed end 22A can be located on the side of the first hollow area 230 away from the through-hole area 210. By opening the first hollow area 230 on the support layer 21, the heat sink 22 passes through the first hollow area 230 and overlaps with the bending center line O. The heat sink 22 occupies less space in the whole machine, which helps to reduce the thickness of the display module. In addition, the heat sink 22 is closer to the heat source of the display module, resulting in better heat dissipation efficiency. By setting the movable end of the heat sink 22 to move with the screen state switching, the stress of the heat sink 22 during the bending process can be effectively released, preventing the heat sink 22 from breaking and improving the service life of the heat sink 22 and the display module.

[0048] In the example embodiment, the bending center line O can be a symmetry line of the screen 1, the surfaces on both sides of the screen 1 located on both sides of the bending center line O can be symmetrical to each other, and the volume of the display module after bending is smaller; or the surfaces on both sides of the screen 1 located on both sides of the bending center line O can be asymmetrical, and the display module after bending can have different forms of display.

[0049] In the example embodiment, the support layer 21 further includes a blind hole area 220, the blind hole area 220 can include a first blind hole area 221 and a second blind hole area 222, the first blind hole area 221 and the second blind hole area 222 are respectively located on both sides of the through hole area 210 along the first direction X, the first hollow area 230 can be located on the side of the first blind hole area 221 away from the through hole area 210, or the first hollow area 230 can be located on the side of the second blind hole area 222 away from the through hole area 210. The orthographic projection of the heat dissipation piece 22 on the support layer 21 can be mutually overlapped with the orthographic projection of the through hole area 210 and the blind hole area 220 on the support layer 21, and can be located on both sides of the first blind hole area 221 and the second blind hole area 222 in the first direction X.

[0050] In the example embodiment, the support layer 21 can be connected with the screen through the first adhesive layer 23, the first adhesive layer 23 can include a second hollow area 231, part of the first adhesive layer 23 in the second hollow area 231 is removed, so that the first adhesive layer 23 forms a hollow structure in the third direction Z, the orthographic projection of the first hollow area 230 on the support layer 21 can be mutually overlapped with the orthographic projection of the second hollow area 231 on the support layer 21, for example, the orthographic projection of the first hollow area 230 on the support layer 21 can be located within the range of the orthographic projection of the second hollow area 231 on the support layer 21. The fixed end 22A can be fixed with the support layer 21 in the second hollow area 231.

[0051] In the example embodiment, the fixed end 22A can be connected with the support layer 21 through the third adhesive layer 25. The fixed end 22A can be connected with the screen through the fourth adhesive layer 26, by setting the fixed end 22A to be connected with the support layer 21 and the screen, the fixed end 22A is more stable, and the heat dissipation piece 22 is not easy to fall off from the support layer 21.

[0052] In the example embodiment, the first adhesive layer 23 can include a base material and first and second sub-glue layers arranged on both sides of the base material, part of the first adhesive layer 23 in the second hollow area 231 and another part of the first adhesive layer 23 can be removed, the fixed end 22A can extend into the removed base material, and the first and second sub-glue layers of the first adhesive layer 23 can be connected with the support layer 21 and the screen respectively, thereby saving cost. Figure 4As shown, the third adhesive layer 25 can be regarded as a first sub-adhesive layer, and the fourth adhesive layer 26 can be regarded as a second sub-adhesive layer. The first and second sub-adhesive layers can be, for example, pressure-sensitive adhesives. The substrate can be, for example, polyimide (PI).

[0053] In an example embodiment, the heat dissipation member 22 can include a graphite material, which can be, for example, a graphite sheet, or a graphite bag formed by sandwiching graphite between materials such as Polyethylene Terephthalate (PET), etc. The graphite bag can prevent the heat dissipation member 22 from rubbing off graphite powder. The heat dissipation member 22 can also include other materials, which are not limited by the present disclosure.

[0054] In an example embodiment, the display module can further include a hinge structure (not shown in the figure), which can be located on the side of the heat dissipation member 22 away from the screen, and configured to provide support and movement guidance, so as to avoid local over-deformation. The hinge structure can be in contact with the heat dissipation member 22, which can help limit the movement of the heat dissipation member 22 in the third direction Z, so as to avoid the heat dissipation member 22 from arching.

[0055] In an example embodiment, the material of the support layer 21 can be a metal material, such as metal titanium (Ti), SUS stainless steel, etc., or a carbon fiber reinforced polymer composite (CFRP), etc., which are not limited by the present disclosure.

[0056] In an example embodiment, the through holes of the through hole region 210 can penetrate the support layer 21 in the second direction Y, or the through holes of the through hole region 210 can penetrate the support layer 21 in the third direction Z. The extension direction of the blind holes in the blind hole region 220 can be the second direction Y or the third direction Z. For example, a plurality of through holes can penetrate the support layer 21 in the third direction Z, and a plurality of blind holes can extend along the third direction Z, which can be designed as needed.

[0057] Figure 6 FIG. 8 shows a top view of the support assembly in another example embodiment, which shows the surface of the support assembly away from the screen 1. Figure 7 FIG. 9 shows a top view of the support assembly in an example embodiment. Figure 6 FIG. 10 shows a cross-sectional view along the AA direction. Figure 6 FIG. 11 shows a cross-sectional view along the BB direction. Figure 3 The difference between FIG. 11 and FIG. 10 is that the positions of the fixed end and the movable end are different, and the position of the first hollow region 230 is different. The remaining contents can refer to the foregoing description of FIG. 10, which will not be repeated here. Figures 3 to 5 FIG. 12 shows a cross-sectional view along the CC direction.

[0058] FIG. 13 shows a cross-sectional view along the DD direction. Figures 6 to 7As shown, the fixed end 22A can be located on the side of the support layer 21 away from the screen and connected with the support layer 21, and the movable end 22B can be located on the side of the support layer 21 close to the screen after passing through the first hollow area 230, and the movable end 22B can move during the process of switching the display module between the unfolded state and the folded state. The fixed end 22A can be located on the side of the first hollow area 230 away from the folding center line O, and the length of the second hollow area 231 in the first direction X can be set to be longer, so as to prevent the movable end 22B from passing out of the first hollow area 230 during the folding process. The positions of the fixed end 22A and the movable end 22B can be set as required, and the utility model does not limit this.

[0059] In an example embodiment, the fixed end 22A can be connected with the side of the support layer 21 away from the screen through the second adhesive layer 24.

[0060] In an example embodiment, in the third direction Z, the thickness of the heat dissipation piece 22 located on the side of the support layer 21 close to the screen can be greater than the thickness of the heat dissipation piece 22 located on the side of the support layer 21 away from the screen, so that the thickness of the movable end 22B side is close to the thickness of the first adhesive layer 23, which helps to limit the heat dissipation piece 22 located on the side of the support layer 21 close to the screen in the third direction Z, and avoids the movable end 22B from arching during the movement process.

[0061] The utility model embodiment further provides a display module, including screen and the support assembly as described above, the support assembly sets up at the back light side surface of the screen.

[0062] Figure 8 For an example embodiment, the position change schematic diagram of the display module before and after folding the movable end, the display module of Figure 1 is shown in the cross-sectional view along the AA direction before and after folding inward. As Figure 8 shown, the screen 1 includes a display substrate 11, a polarizer 12, a fifth adhesive layer 13 and a cover plate 14 arranged in sequence in the direction away from the support assembly 2, the fifth adhesive layer 13 is used to connect the polarizer 12 and the cover plate 14 together, the fifth adhesive layer 13 can be optically clear adhesive (Optically Clear Adhesive, OCA), and the cover plate 14 can be glass. Figure 8The upper graph shows the flat state of the display module, and the lower graph shows the inner folding state of the display module. The reference signs of the components in the inner folding state are omitted. In the inner folding state of the display module, the contact positions of the hinge structure 30 and the heat dissipation member 22 are indicated, which can play a supporting role, for example, including a first contact position C1, a second contact position C2, a third contact position C3, and a fourth contact position C4. The orthographic projection of the first contact position C1 on the display module can be superimposed with the orthographic projection of the first blind hole area 221 on the display module. The orthographic projection of the fourth contact position C4 on the display module can be superimposed with the orthographic projection of the second blind hole area 222 on the display module. The orthographic projection of the second contact position C2 and the third contact position C3 on the display module can be superimposed with the orthographic projection of the through hole area 210 on the display module. In the exemplary embodiment, any one of the contact positions and the heat dissipation member 22 can adopt a point contact, a line contact, or a surface contact. The contact form between the hinge structure and the heat dissipation member 22 can be set according to actual needs, and the utility model does not limit this.

[0063] As shown in Figure 8 , in the flat state, the distance between the movable end 22B of the heat dissipation member 22 and the edge of the adjacent support layer 21 in the first direction X is a first distance S1. With the movement of the support layer 21 during the folding process, the movable end 22B moves. In the inner folding state, the distance between the movable end 22B and the edge of the adjacent support layer 21 in the first direction X changes to a second distance S2. The distance traveled by the movable end 22B in the first direction X during the folding process is a third distance S3. By setting the movable end 22B to be movable, the stress accumulated in the heat dissipation member 22 during the folding process can be released, and the possibility of arching of the heat dissipation member 22 can be reduced.

[0064] Figure 9 For another exemplary embodiment, a schematic view of the position change of the movable end of the display module before and after folding is shown, which shows the cross-sectional view of the display module along the AA direction before and after outer folding. Figure 1 Figure 9 The difference between Figure 8 and the foregoing is that the folding form is different, and the contact position of the hinge structure 30 and the heat dissipation member 22 is a fifth contact position C5. The remaining contents can refer to the foregoing description of Figure 8 , and will not be described again here.

[0065] As shown in Figure 9 ​As shown, the orthographic projection of the fifth contact position C5 on the display module can be overlapped with the orthographic projection of the through hole area 210 on the display module. In the flattened state, the distance between the movable end 22B of the heat dissipation piece 22 and the edge of the adjacent support layer 21 in the first direction X is a first distance S1, as the bending process proceeds, the movable end 22B moves with the movement of the support layer 21, in the outer folding state, the distance between the movable end 22B and the edge of the adjacent support layer 21 in the first direction X changes to a fourth distance S4, the distance traveled by the movable end 22B in the first direction X during the bending process is a fifth distance S5. In the outer folding state, the movable end 22B has a shorter movement distance.

[0066] The display device can be any product or component having a display function, such as an OLED display, a QLED display, an LED display, a projector, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, etc., and the embodiments of the present application are not limited thereto.

[0067] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A support assembly, characterized by, The application relates to a support layer for a foldable screen. The support layer is arranged on the backlight side of the screen and connected with the screen. The support layer is arranged to be bent along a bending center line of the support layer, so that the screen is switched between an unfolded state and a folded state. The first hollow area is arranged on one side of the bending center line in the plane of the support layer. The heat dissipation member comprises a fixed end and a movable end.

2. The support assembly of claim 1, wherein, The fixed end is arranged to be connected with the support layer. The movable end passes through the first hollow area.

3. The support assembly of claim 2, wherein, One end of the heat dissipation member is arranged on the side of the support layer close to the screen, and the other end is arranged on the side of the support layer away from the screen. The projection of the heat dissipation member on the support layer and the projection of the bending center line on the support layer overlap each other.

4. The support assembly of claim 3, wherein, The support layer comprises a through hole area. The bending center line and the through hole area overlap each other in the plane of the support layer.

5. The support assembly of claim 4, wherein, The first hollow area is arranged on one side of the through hole area along a first direction.

6. The support assembly of claim 5, wherein, The bending center line extends along a second direction.

7. The support assembly of claim 4, wherein, The first direction and the second direction intersect.

8. The support assembly of claim 7, wherein, The projection of the heat dissipation member on the support layer and the projection of the through hole area on the support layer overlap each other. The support layer further comprises a first blind hole area and a second blind hole area. The first blind hole area and the second blind hole area comprise a plurality of blind holes. The first blind hole area and the second blind hole area are arranged on the two sides of the through hole area along the first direction. The first hollow area is arranged on the side of the first blind hole area or the second blind hole area away from the through hole area. The projection of the heat dissipation member on the support layer and the projections of the through hole area, the first blind hole area and the second blind hole area on the support layer overlap each other. The support layer is connected with the screen through a first adhesive layer. The first adhesive layer comprises a second hollow area arranged perpendicularly to the screen. The projection of the first hollow area on the support layer and the projection of the second hollow area on the support layer overlap each other. The heat dissipation member on the side of the support layer away from the screen is arranged in the second hollow area. The fixed end is arranged on the side of the support layer away from the screen. The fixed end is connected with the surface of the support layer away from the screen through a second adhesive layer. In the direction perpendicular to the support layer, the thickness of the heat dissipation member on the side of the support layer close to the screen is greater than the thickness of the heat dissipation member on the side of the support layer away from the screen. The fixed end is arranged on the side of the support layer close to the screen and in the second hollow area. The fixed end is connected with the screen through a fourth adhesive layer in the second hollow area.

9. The support assembly of claim 4, wherein, The fixed end is located on a side of the support layer close to the screen, and the first adhesive layer comprises a substrate and first and second sub-adhesive layers arranged on two sides of the substrate, the first sub-adhesive layer is arranged to be connected with the support layer, and the second sub-adhesive layer is arranged to be connected with the screen. In the second hollow area, part of the substrate of the first adhesive layer is removed, the fixed end extends into the first adhesive layer from which the substrate is removed, and is connected with the first and second sub-adhesive layers.

10. The support assembly of claim 4, wherein, The heat dissipation member comprises a graphite material.

11. A display module, characterized by The display module comprises: The screen comprises a display substrate, a polarizer and a cover plate arranged in sequence, and the display substrate is connected with the support assembly.

12. The display module of claim 11, wherein, The display module further comprises a hinge structure located on a side of the heat dissipation member away from the screen and in contact with the heat dissipation member.

13. The display module of claim 11, wherein, The position of the hinge structure in contact with the heat dissipation member has a normal projection on the support assembly that overlaps at least one of the through-hole area, the first blind hole area and the second blind hole area.

14. The display module of claim 13, wherein, The display module comprises the support assembly according to any one of claims 1 to 10; or the display module comprises the display module according to any one of claims 11 to 14.

15. A display device comprising: ​

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