Display module and display device

Abstract

The utility model discloses a display module and a display device, and belongs to the technical field of display. The display module comprises a display panel, a composite structure and a functional element. Wherein the composite structure is located on the back face of the display panel and comprises an adhesive layer, a first heat conduction layer, a second heat conduction layer and heat conduction liquid, a sealing cavity is formed between the first heat conduction layer and the second heat conduction layer, and the heat conduction liquid is located in the sealing cavity. The functional element is located on the face, away from the display panel, of the composite structure, the functional element can emit heat when working, the heat can be absorbed by the second heat conduction layer and conducted to the heat conduction liquid, the heat conduction liquid has fluidity, the heat conduction liquid can disperse the heat through flowing, and therefore the situation that local heat of the display module is too high can be avoided; and the service life of the display module can be prolonged.

Description

Technical Field

[0001] The utility model relates to the field of display technology, and in particular to a display module and a display device. Background Art

[0002] A display module is a module used to display images and text.

[0003] A display module includes a display panel, a functional element and a heat-conducting layer, wherein the heat-conducting layer is attached to the back of the display panel, and the functional element is located on the side of the heat-conducting layer away from the display panel. The functional element may include an element that realizes functions such as driving, control or data transmission. The functional element will emit a large amount of heat when working, and the heat-conducting layer can absorb and conduct the heat emitted by the functional element.

[0004] However, the heat dissipation effect of the above-mentioned heat conductive layer is poor, which causes excessive heat in the local area of ​​the display module, thereby resulting in a short life of the display module. Utility Model Content

[0005] The embodiment of the utility model provides a display module and a display device. The technical solution is as follows:

[0006] According to one aspect of the present invention, a display module is provided, the display module comprising:

[0007] A display panel, the display panel comprising a front side and a back side opposite to the front side;

[0008] A composite structure, the composite structure is located on the back of the display panel, the composite structure comprises an adhesive layer, a first heat-conducting layer, a second heat-conducting layer and a heat-conducting liquid, the adhesive layer, the first heat-conducting layer and the second heat-conducting layer are stacked on the back of the display panel in a direction away from the display panel, a sealed cavity is provided between the first heat-conducting layer and the second heat-conducting layer, and the heat-conducting liquid is located in the sealed cavity;

[0009] A functional element is located on a surface of the composite structure away from the display panel.

[0010] Optionally, the composite structure further includes a heat-conducting structure, wherein the heat-conducting structure is located in the sealed cavity, and the heat-conducting structure is in contact with the first heat-conducting layer and the second heat-conducting layer respectively.

[0011] Optionally, the heat-conducting structure comprises a plurality of protruding structures made of a heat-conducting material, and the plurality of protruding structures are evenly distributed in the sealed cavity.

[0012] Optionally, the protruding structure is cylindrical, and the diameter of the protruding structure ranges from 2 mm to 10 mm, and the distance between two adjacent protruding structures ranges from 2 mm to 5 mm.

[0013] Optionally, the multiple protrusion structures include multiple cylindrical first protrusion structures and multiple strip-shaped second protrusion structures, and the multiple first protrusion structures are respectively located on both sides of the multiple second protrusion structures in a first direction, and the first direction is a direction parallel to the length direction of the second protrusion structures.

[0014] Optionally, the plurality of protruding structures include at least one of a first protruding structure, a second protruding structure and a third protruding structure;

[0015] The first protrusion structure is a protrusion structure connected to the first heat-conducting layer, the second protrusion structure is a protrusion structure connected to the second heat-conducting layer, the third protrusion structure includes a first sub-protrusion structure and a second sub-protrusion structure, one end of the first sub-protrusion structure is connected to the first heat-conducting layer, and the other end is in contact with one end of the second sub-protrusion structure, and the other end of the second sub-protrusion structure is connected to the second heat-conducting layer.

[0016] Optionally, the heat-conducting structure includes a first retaining wall structure, and an orthographic projection of the first retaining wall structure on the first heat-conducting layer is spiral.

[0017] Optionally, the heat conducting structure further includes a second retaining wall structure, the orthographic projection of the second retaining wall structure on the first heat conducting layer is spiral, the second retaining wall structure and the first retaining wall structure are nested with each other, and there is a specified distance between the second retaining wall structure and the first retaining wall structure.

[0018] Optionally, an orthographic projection of the sealed cavity on the back surface of the display panel is outside an orthographic projection of the functional element on the back surface of the display panel.

[0019] Optionally, the composite structure further includes a sealing structure, and the sealing structure is respectively bonded to the first heat-conducting layer and the second heat-conducting layer to form the sealed cavity with the first heat-conducting layer and the second heat-conducting layer.

[0020] Optionally, the sealing structure has a perfusion structure, which includes a recessed structure recessed toward the interior of the sealing cavity, and an extension structure located in the recessed structure and extending away from the interior of the sealing cavity. The extension structure and the first heat-conducting layer and the second heat-conducting layer form a perfusion channel, and the perfusion channel has a sealing cover at one end away from the interior of the sealing cavity.

[0021] Optionally, the composite structure further includes at least one pipe, the first heat-conducting layer and the second heat-conducting layer respectively have openings corresponding to the pipe, one end of the pipe is connected to the opening on the first heat-conducting layer, and the other end is connected to the opening on the second heat-conducting layer.

[0022] Optionally, the distance between the pipeline and the heat-conducting structure ranges from 2 mm to 4 mm.

[0023] On the other hand, a display device is provided, comprising at least one functional module and any one of the above-mentioned display modules.

[0024] Optionally, the composite structure further includes at least one pipe, the first heat-conducting layer and the second heat-conducting layer respectively have openings corresponding to the pipe, one end of the pipe is connected to the opening on the first heat-conducting layer, and the other end is connected to the opening on the second heat-conducting layer;

[0025] The at least one functional module corresponds to the at least one pipeline, and an orthographic projection of the at least one pipeline on the display panel overlaps with an orthographic projection of the corresponding functional module on the display panel.

[0026] The beneficial effects brought by the technical solution provided by the embodiment of the utility model include at least:

[0027] A display module including a display panel, a composite structure and a functional element is provided. The composite structure is located on the back of the display panel, and includes an adhesive layer, a first heat-conducting layer, a second heat-conducting layer and a heat-conducting liquid. A sealed cavity is provided between the first heat-conducting layer and the second heat-conducting layer, and the heat-conducting liquid is located in the sealed cavity. The functional element is located on the side of the composite structure away from the display panel. When the functional element is working, it will emit heat, which can be absorbed by the second heat-conducting layer and conducted to the heat-conducting liquid. The heat-conducting liquid has fluidity, so the heat-conducting liquid can disperse the heat by flowing, thereby avoiding excessive local heat of the display module, and further increasing the life of the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 This is a schematic diagram of a top view structure of a display module provided by an embodiment of the utility model;

[0030] Figure 2 yes Figure 1 A schematic diagram of a cross-sectional structure of a display module is provided;

[0031] Figure 3 It is a schematic diagram of a top view of a part of the structure in another display module provided by an embodiment of the utility model;

[0032] Figure 4 yes Figure 3 A schematic diagram of a cross-sectional structure of a part of the structure in the provided display module;

[0033] Figure 5 It is a schematic diagram of a top view of a part of the structure in another display module provided by an embodiment of the utility model;

[0034] Figure 6 It is a cross-sectional structural diagram of a part of the structure in another display module provided by an embodiment of the utility model;

[0035] Figure 7 It is a schematic diagram of a top view of a part of the structure in another display module provided by an embodiment of the utility model;

[0036] Figure 8 It is a schematic diagram of a top view of a part of the structure in another display module provided by an embodiment of the utility model;

[0037] Fig. 9 It is a schematic diagram of a top view of a part of the structure in another display module provided by an embodiment of the utility model;

[0038] Fig.10 yes Fig. 9 A schematic diagram of a cross-sectional structure of a part of the structure in the provided display module;

[0039] Fig.11 It is a schematic diagram of a top view of a part of the structure in another display module provided by an embodiment of the utility model;

[0040] Fig.12 yes Fig.11 A schematic diagram of a cross-sectional structure of a part of the structure in the provided display module;

[0041] Fig.13 It is a schematic cross-sectional structure diagram of another display module provided by an embodiment of the utility model;

[0042] Fig.14 It is a schematic diagram of a top view of a part of the structure in another display module provided by an embodiment of the utility model;

[0043] Fig.15 yes Fig.14 A schematic diagram of a cross-sectional structure of a part of the structure in the provided display module;

[0044] Fig.16 It is a structural schematic diagram of a display device provided by an embodiment of the utility model.

[0045] The above drawings have shown clear embodiments of the present invention, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0047] Please refer to Figure 1 and Figure 2 , Figure 1 is a schematic diagram of a top view structure of a display module provided by an embodiment of the utility model, Figure 2 yes Figure 1 A cross-sectional structural diagram of a display module provided ( Figure 2 Can be Figure 1 A schematic diagram of a cross-sectional structure of a display module at A1-A1 is provided, wherein the display module 10 comprises:

[0048] The display panel 11 includes a front surface B1 and a back surface B2 opposite to the front surface B1 .

[0049] The composite structure 12 is located on the back side B2 of the display panel 11. The composite structure 12 includes an adhesive layer 121, a first heat-conducting layer 122, a second heat-conducting layer 123 and a heat-conducting liquid 124. The adhesive layer 121, the first heat-conducting layer 122 and the second heat-conducting layer 123 are stacked on the back side B2 of the display panel 11 in a direction away from the display panel 11. A sealed cavity K1 is provided between the first heat-conducting layer 122 and the second heat-conducting layer 123, and the heat-conducting liquid 124 is located in the sealed cavity K1.

[0050] The functional element 13 is located on a surface of the composite structure 12 away from the display panel 11 .

[0051] In summary, the embodiment of the utility model provides a display module including a display panel, a composite structure and a functional element. The composite structure is located on the back of the display panel, and the composite structure includes an adhesive layer, a first heat-conducting layer, a second heat-conducting layer and a heat-conducting liquid. A sealed cavity is provided between the first heat-conducting layer and the second heat-conducting layer, and the heat-conducting liquid is located in the sealed cavity. The functional element is located on the side of the composite structure away from the display panel. When the functional element is working, it will emit heat, which can be absorbed by the second heat-conducting layer and conducted to the heat-conducting liquid. The heat-conducting liquid has fluidity, so the heat-conducting liquid can disperse the heat by flowing, thereby avoiding excessive local heat in the display module, and further increasing the life of the display module.

[0052] Please refer to Figure 1 and Figure 2 The display panel 11 provided in the embodiment of the utility model can be an organic light emitting diode (OLED) display panel. The OLED display panel has flexibility and a more delicate display effect, and can be widely used in various electronic products.

[0053] The composite structure 12 includes an adhesive layer 121, a first heat-conducting layer 122, a second heat-conducting layer 123 and a heat-conducting liquid 124. The adhesive layer 121 is bonded to the back surface B1 of the display panel 11 and the first heat-conducting layer, respectively. For example, the adhesive layer 121 may include a grid glue, which may squeeze the bubbles generated when the display panel 11 and the first heat-conducting layer 122 are bonded to the periphery through the grid pattern to discharge the bubbles, thereby improving the flatness of the first heat-conducting layer 122. In addition, the thickness of the adhesive layer 121 in the direction perpendicular to the display panel 11 may range from 0.12 mm to 0.14 mm to ensure the firmness of the bonding between the back surface B1 of the display panel 11 and the first heat-conducting layer 122. The thickness of the adhesive layer 121 may also be adjusted according to the actual requirements of bonding the display panel 11 to the first heat-conducting layer 122, and the embodiment of the utility model is not limited thereto.

[0054] The first heat-conducting layer 122 and the second heat-conducting layer 123 can absorb and conduct the heat emitted by the display panel 11 or the functional element 13. The materials of the first heat-conducting layer 122 and the second heat-conducting layer 123 may include metal materials. For example, the first heat-conducting layer 122 and the second heat-conducting layer 123 may include copper foil. Copper has a high thermal conductivity. The thermal conductivity can reflect the ability of a material to conduct heat. Therefore, the use of copper foil can improve the thermal conductivity of the composite structure 12.

[0055] The heat-conducting liquid 124 can absorb the heat conducted by the first heat-conducting layer 122 and the second heat-conducting layer 123, and the heat-conducting liquid 124 has fluidity, so that the heat-conducting liquid 124 can disperse the heat. Exemplarily, the heat-conducting liquid 124 can include a liquid with a large specific heat capacity such as water, and the specific heat capacity of water is greater than the specific heat capacity of copper. Then, the heat-conducting liquid 124 can absorb more heat than the first heat-conducting layer 122 and the second heat-conducting layer 123, and the heat can be quickly dispersed by the flow of the heat-conducting liquid 124, thereby avoiding excessive local heat in the display module 10. The display module provided by the embodiment of the utility model can be applied to electronic products such as mobile phones or tablets. When a user uses an electronic product including the display module, the heat-conducting liquid 124 can flow due to the user moving the electronic product.

[0056] In addition, the composite structure 12 may be a super clean foam (SCF) structure, and the composite structure 12 may further include foam, which may be located between the adhesive layer 121 and the first heat conductive layer 122, and the foam may buffer and protect the display panel 21. Exemplarily, the foam may include polyurethane foam, conductive foam, aluminum foil foam, and other foams with strong thermal conductivity, thereby improving the thermal conductivity of the composite structure 12.

[0057] The functional element 13 may include one or more electronic components, and the functional element 13 may realize functions such as driving, controlling or data transmission. Exemplarily, the functional element 13 includes chips such as a driver chip, and the driver chip is electrically connected to the display panel 10, so that the driver chip sends a driving signal to the display panel to realize the display function. Due to the high integration of the chip, the functional element 13 will emit a large amount of heat when powered on, and heat accumulation will occur, resulting in excessively high local temperatures of the display panel 11. The areas of the display panel 11 with excessively high temperatures will accelerate aging, which is not conducive to the life of the display module 10. The composite structure 12 can absorb and disperse the heat emitted by the functional element 13, thereby solving the problem of excessive local heat.

[0058] In an exemplary embodiment, the composite structure further includes a heat conducting structure, see Figure 3 and Figure 4 , Figure 3 Schematic diagram of a top view of a part of the structure of another display module provided by an embodiment of the utility model (to clearly illustrate the heat conduction structure, Figure 3 The first heat-conducting layer is not shown, but this is not limited in the embodiment of the present invention). Figure 4 yes Figure 3 A schematic diagram of a cross-sectional structure of a part of the structure in the display module provided ( Figure 4 Can be Figure 3A schematic diagram of a cross-sectional structure of a display module at A1-A1 is provided. The composite structure 12 includes an adhesive layer 121, a first heat-conducting layer 122, a second heat-conducting layer 123, a heat-conducting liquid 124 and a heat-conducting structure 125.

[0059] Among them, the heat-conducting structure 125 is located in the sealed cavity K1, and the heat-conducting structure 125 is in contact with the first heat-conducting layer 122 and the second heat-conducting layer 123 respectively. The heat-conducting structure 125 can conduct heat between the heat-conducting liquid 124, the first heat-conducting layer 122 and the second heat-conducting layer 123, thereby improving the speed at which the first heat-conducting layer 122 and the second heat-conducting layer 123 conduct heat to the heat-conducting liquid 124, and then the heat emitted by the functional element 13 can be dispersed in time.

[0060] Optionally, the heat-conducting structure 125 may include a plurality of raised structures C made of a heat-conducting material, and the plurality of raised structures C are evenly distributed in the sealed cavity K1. The plurality of raised structures C can all conduct heat between the heat-conducting liquid 124, the first heat-conducting layer 122 and the second heat-conducting layer 123, and the plurality of raised structures C are evenly distributed in the sealed cavity K1 to reduce the difference in thermal conductivity of each region of the composite structure 12, thereby avoiding excessive local heat. The plurality of evenly distributed raised structures C can also provide support for the sealed cavity K1, thereby improving the structural stability of the first heat-conducting layer 122, the second heat-conducting layer 123 and the sealed cavity K1. In addition, the heat-conducting material included in the heat-conducting structure 125 can be the same as that of the first heat-conducting layer 122 and the second heat-conducting layer 123, so that it can be easily manufactured. Exemplarily, the heat-conducting material included in the heat-conducting structure 125 can be copper, which has a higher thermal conductivity, thereby improving the thermal conductivity of the heat-conducting structure 125.

[0061] In addition, the distribution of the plurality of protrusion structures C may include Figure 3 In the case shown, the plurality of protrusion structures C are arranged in rows and columns in the first direction X1 and the second direction X2, the first direction X1 is perpendicular to the second direction X2, and the spacing between adjacent protrusion structures C is equal, so that the uniformity of the distribution of the plurality of protrusion structures C can be improved, thereby reducing the difference in thermal conductivity. Figure 3 In the illustrated case, the distribution of the plurality of protruding structures C may also be adaptively adjusted according to the shape of the sealing cavity K1 . For example, the plurality of protruding structures C may also be distributed in a diamond shape.

[0062] The protrusion structure provided in the embodiment of the utility model can include various shapes. Figure 3 and Figure 4, the raised structure C can be cylindrical. The upper bottom surface and the lower bottom surface of the cylindrical raised structure C can be parallel to the first heat-conducting layer 122 and the second heat-conducting layer 123, respectively, so that the raised structure is easy to contact with the first heat-conducting layer 122 and the second heat-conducting layer 123, respectively, and the contact area between the raised structure C and the first heat-conducting layer 122 and the second heat-conducting layer 123 can be increased, thereby improving the speed at which the heat-conducting structure 125 conducts heat between the heat-conducting liquid 124, the first heat-conducting layer 122 and the second heat-conducting layer 123. In addition, the diameter of the raised structure C can range from 2 mm to 10 mm, and the distance between two adjacent raised structures C can range from 2 mm to 5 mm. When the diameter and distance of the raised structure C are within this range, the difference in thermal conductivity of each area of ​​the composite structure 12 can be reduced. Exemplarily, the diameter of the raised structure C can be 4 mm, and the distance between two adjacent raised structures C can be 2 mm. In addition, the size and spacing of the raised structures C can also be adaptively adjusted according to the size and heat dissipation requirements of the display module. For example, the raised structures C corresponding to the areas with greater heat dissipation requirements in the display module can be denser, and the embodiments of the present invention are not limited to this.

[0063] Optionally, the raised structure can also be in the form of strips, see Figure 5 , Figure 5 Schematic diagram of a top view of a part of the structure of another display module provided by an embodiment of the utility model (to clearly illustrate the heat conduction structure, Figure 5 The first heat-conducting layer is not shown, but the embodiment of the utility model is not limited to this). The multiple protruding structures C include multiple cylindrical first protruding structures C1 and multiple strip-shaped second protruding structures C2. The multiple first protruding structures C1 are respectively located on both sides of the multiple second protruding structures C2 in the first direction X1, and the first direction X1 is a direction parallel to the length direction of the second protruding structures C2. Among them, the multiple strip-shaped second protruding structures C2 can form multiple channels for the flow of heat-conducting liquids 124, and guide the heat-conducting liquids 124 to flow along the length direction of the second protruding structures C2, so that the heat can be dispersed to the area away from the functional element 13 by the flowing heat-conducting liquid 124 to avoid heat accumulation.

[0064] In addition, the embodiment of the utility model does not limit the length and distribution area of ​​the plurality of second protrusion structures C2. Figure 5In the case where the lengths of the second protruding structures C2 are not equal as shown, there may also be a case where the lengths of some second protruding structures C2 are equal or the lengths of multiple second protruding structures C2 are all equal. Multiple first protruding structures C1 may also be located on one side of the multiple second protruding structures C2 in the first direction X1. In addition, in addition to the above-mentioned cylindrical protruding structures and strip-shaped protruding structures, the shape of the cross section of the protruding structure parallel to the display panel may also include an ellipse or other polygon, which is not limited in the embodiment of the utility model.

[0065] Optionally, a plurality of protrusion structures may be connected to the first heat-conducting layer and / or the second heat-conducting layer to improve the thermal conductivity of the composite structure. Figure 6 , Figure 6 : is a schematic cross-sectional structure diagram of a partial structure of another display module provided by an embodiment of the present utility model. The plurality of protruding structures C may include at least one of a first protruding structure C1, a second protruding structure C2 and a third protruding structure C3. For example, Figure 6 The multiple protrusion structures C in the display module shown include a first protrusion structure C1, a second protrusion structure C2, and a third protrusion structure C3. The first protrusion structure C1 is a protrusion structure connected to the first heat-conducting layer 122, the second protrusion structure C2 is a protrusion structure located at the second heat-conducting layer 123, and the third protrusion structure C3 includes a first sub-protrusion structure C31 and a second sub-protrusion structure C32. One end of the first sub-protrusion structure C31 is connected to the first heat-conducting layer 122, and the other end is in contact with one end of the second sub-protrusion structure C32. The other end of the second sub-protrusion structure C32 is connected to the second heat-conducting layer 123. The cavity K1 includes a first area Q1, a second area Q2, and a third area Q3. The first protrusion structure C1 can be located in the first area Q1, the second protrusion structure C2 can be located in the second area Q2, and the third protrusion structure C3 can be located in the third area Q3. In addition, the distribution area of ​​the first protruding structure C1 , the second protruding structure C2 and the third protruding structure C3 may also be any area in the cavity K1 , and the embodiment of the utility model is not limited to this.

[0066] A plurality of protruding structures C may be connected to the first heat-conducting layer 122 and / or the second heat-conducting layer 123, and the first protruding structure C1 may be an integral structure with the first heat-conducting layer 122, the second protruding structure C2 may be an integral structure with the second heat-conducting layer 123, and the third protruding structure C3 may be an integral structure with the first heat-conducting layer 122 and the second heat-conducting layer 123. The integral structure may be a structure formed by a one-time process, which may simplify the manufacturing process of the protruding structure C and improve the structural stability of the protruding structure C. In addition, compared with the case where the protruding structure C is in contact with the first heat-conducting layer 122 or the second heat-conducting layer 123, the integral structure may improve the thermal conductivity of the first heat-conducting layer 122 or the second heat-conducting layer 123 to which the protruding structure C is connected, and may increase the contact area between the first heat-conducting layer 122 or the second heat-conducting layer 123 and the heat-conducting liquid, thereby improving the heat exchange capacity, and further improving the thermal uniformity of the display module.

[0067] In an exemplary embodiment, the heat conducting structure may further include a first retaining wall structure, see Figure 7 , Figure 7 Schematic diagram of a top view of a part of the structure of another display module provided by an embodiment of the utility model (to clearly illustrate the heat conduction structure, Figure 7 The first heat-conducting layer is not shown, but the embodiment of the utility model is not limited to this). The heat-conducting structure 125 includes a first retaining wall structure D1, and the orthographic projection of the first retaining wall structure D1 on the first heat-conducting layer 122 is spiral, so that the first retaining wall structure D1 can provide a channel F1 for the heat-conducting liquid to guide the flow of the heat-conducting liquid. The spiral first retaining wall structure D1 includes multiple circles, and the channel F1 is a sealed cavity between two adjacent circles of the first retaining wall structure D1. And the first retaining wall structure D1 can also increase the contact area between the heat-conducting structure 125 and the heat-conducting liquid to improve the thermal conductivity of the display module.

[0068] Exemplarily, the first retaining wall structure D1 may include a first end D11 away from the spiral center and a second end D12 close to the spiral center, wherein the first end D11 of the first retaining wall structure D1 may be located on a side of the second end D12 close to the positive projection of the functional element on the first heat conducting layer 122 . Figure 7The direction indicated by the middle arrow may be the flow direction of the heat-conducting liquid. After the heat-conducting liquid absorbs the heat emitted by the functional element, the first retaining wall structure D1 may guide the heat-conducting liquid to flow from the first end D11 to the second end D12, so that the heat-conducting liquid may conduct the absorbed heat to an area away from the functional element, thereby achieving the effect of dispersing heat. In addition, the first retaining wall structure D1 may also include a heat-conducting material, and the first retaining wall structure D1 may be an integrated structure with the first heat-conducting layer 122 and / or the second heat-conducting layer 123, so that the contact area between the first heat-conducting layer 122 or the second heat-conducting layer 123 and the heat-conducting liquid may be increased to improve the heat exchange capacity, thereby improving the thermal uniformity of the display module.

[0069] Optionally, the heat conducting structure may further include a second retaining wall structure, see Figure 8 , Figure 8 Schematic diagram of a top view of a part of the structure of another display module provided by an embodiment of the utility model (to clearly illustrate the heat conduction structure, Figure 8 The first heat-conducting layer is not shown, but the embodiment of the utility model does not limit this). The heat-conducting structure 125 includes a first retaining wall structure D1 and a second retaining wall structure D2. The orthographic projection of the second retaining wall structure D2 on the first heat-conducting layer 122 is spiral. The second retaining wall structure D2 and the first retaining wall structure D1 are nested with each other, and there is a specified spacing E1 between the second retaining wall structure D2 and the first retaining wall structure D1. The specified spacing E1 can ensure that the first retaining wall structure D1 and the second retaining wall structure D2 are not attached together, so that the second retaining wall structure D2 can also provide a channel F2 for the heat-conducting liquid. The spiral second retaining wall structure D2 includes multiple circles, and the channel F2 is a sealed cavity between two adjacent circles of the spiral second retaining wall structure D2. By making the second retaining wall structure D2 and the first retaining wall structure D1 nested with each other, the channel F1 provided by the first retaining wall structure D1 and the channel F2 provided by the second retaining wall structure D2 can be connected, so that the second retaining wall structure D2 can further guide the flow of the heat-conducting liquid and improve the smoothness of the flow of the heat-conducting liquid. The second retaining wall structure D2 can also increase the contact area between the heat-conducting structure 125 and the heat-conducting liquid to improve the thermal conductivity of the display module. Figure 8 The specified spacing E1 shown is the spacing between the outermost circles of the spiral first retaining wall structure D1 and the second retaining wall structure D2. The specified spacing E1 can be the spacing between the first retaining wall structure D1 and the second retaining wall structure D2 adjacent to each other at each position. The embodiment of the utility model is not limited to this, and the embodiment of the utility model does not limit the specified spacing E1 to be equal at each position.

[0070] Exemplarily, the second retaining wall structure D2 may include a third end D21 close to the spiral center and a fourth end D22 away from the spiral center, wherein the fourth end D22 of the second retaining wall structure D2 may be located on a side of the third end D21 away from the positive projection of the functional element on the first heat conducting layer 122 . Figure 8 The direction indicated by the middle arrow may be the flow direction of the heat-conducting liquid. After the heat-conducting liquid absorbs the heat emitted by the functional element, the first retaining wall structure D1 may guide the heat-conducting liquid to flow from the first end D11 to the second end D12. Since the channel provided by the first retaining wall structure D1 and the channel provided by the second retaining wall structure D2 may be connected, the heat-conducting liquid flows from the second end D12 to the third end D21. The second retaining wall structure D2 may further guide the heat-conducting liquid to flow from the third end D21 to the fourth end D22, so that the heat-conducting liquid may conduct the absorbed heat to the area away from the functional element, thereby achieving the effect of dispersing heat. In addition, the second retaining wall structure D2 may also include a heat-conducting material, and the second retaining wall structure D2 may also be an integrated structure with the first heat-conducting layer 122 and / or the second heat-conducting layer 123, so that the contact area between the first heat-conducting layer 122 or the second heat-conducting layer 123 and the heat-conducting liquid may be increased to improve the heat exchange capacity, thereby improving the thermal uniformity of the display module.

[0071] Optionally, the composite structure further comprises a sealing structure to improve the sealing performance of the sealing cavity. Fig. 9 and Fig.10 , Fig. 9 Schematic diagram of a top view of a part of the structure of another display module provided by an embodiment of the utility model (to clearly illustrate the heat conduction structure, Fig. 9 The first heat-conducting layer is not shown, but this is not limited in the embodiment of the present invention). Fig.10 yes Fig. 9 A schematic diagram of a cross-sectional structure of a part of the structure in the display module provided ( Fig.10 Can be Fig. 9 A schematic diagram of the cross-sectional structure of the display module provided at A3-A3). The composite structure 12 also includes a sealing structure 126, and the sealing structure 126 is bonded to the first heat-conducting layer 122 and the second heat-conducting layer 123, respectively, to form a sealed cavity K1 with the first heat-conducting layer 122 and the second heat-conducting layer 123. The sealing structure 126 can be arranged around the edges of the first heat-conducting layer 122 and the second heat-conducting layer 123, so as to avoid the sealing structure 126 affecting the size of the sealed cavity K1. Exemplarily, the width of the surrounding sealing structure 126 can range from 0.5 mm to 1 mm. When the width of the sealing structure 126 is within this range, the sealing of the sealed cavity K1 can be ensured, and the sealing cavity K1 can be made smaller due to the excessive width of the sealing structure 126, thereby avoiding the poor thermal uniformity of the display module caused by less heat-conducting liquid that can be accommodated in the sealed cavity K1.

[0072] In addition, the sealing structure 126 may include a sealant, or the sealing structure 126 may be formed by a hot pressing process. When the sealing structure 126 includes a sealant, the sealant is bonded to the edge of the first heat-conducting layer 122 and the edge of the second heat-conducting layer 123, respectively, to form a sealed cavity K1 with the first heat-conducting layer 122 and the second heat-conducting layer 123. Exemplarily, the sealant may include waterproof glue, so as to avoid affecting the sealing of the sealed cavity K1 when the heat-conducting liquid includes water. When the sealing structure 126 is formed by a hot pressing process, the edge of the first heat-conducting layer 122 and the edge of the second heat-conducting layer 123 may be hot-pressed by a mold, so that the edges of the first heat-conducting layer 122 and the second heat-conducting layer 123 may form the sealing structure 126, and then the first heat-conducting layer 122 and the second heat-conducting layer 123 may form the sealed cavity K1. In addition, the sealing structure 126 also includes a variety of situations. For example, after the edge of the first thermal conductive layer 122 or the edge of the second thermal conductive layer 123 is coated with adhesive, the edge of the first thermal conductive layer 122 or the edge of the second thermal conductive layer 123 may be hot pressed through a mold. This can further improve the firmness of the connection between the edge of the first thermal conductive layer 122 and the edge of the second thermal conductive layer 123, thereby improving the sealing of the sealed cavity K1.

[0073] Optionally, the sealing structure 126 has a perfusion structure 127, the perfusion structure 127 includes a recessed structure 1271 recessed toward the inside of the sealing cavity K1, and an extension structure 1272 located in the recessed structure 1271 and extending away from the inside of the sealing cavity K1, the extension structure 1272 and the first heat-conducting layer 122 and the second heat-conducting layer 123 form a perfusion channel K2, and the end of the perfusion channel K2 away from the inside of the sealing cavity K1 has a sealing cover K3. Among them, the recessed structure 1271 and the extension structure 1272 can improve the strength of the perfusion structure 127, so as to avoid the pressure of the heat-conducting liquid causing the perfusion structure 127 to be damaged. The heat-conducting liquid can be perfused into the inside of the sealing cavity K1 through the perfusion channel K2. Exemplarily, the width of the perfusion channel K2 can range from 0.2 mm to 0.5 mm. The sealing cover K3 may be formed after the heat-conducting liquid is poured into the sealing cavity K1 . The sealing cover K3 may also include a sealant, or the sealing cover K3 may be formed by a hot pressing process to ensure the sealing of the sealing cavity K1 .

[0074] In an exemplary embodiment, please refer to Fig.11 and Fig.12 , Fig.11 Schematic diagram of a top view of a part of the structure of another display module provided by an embodiment of the utility model (to clearly illustrate the heat conduction structure, Fig.11 The first heat-conducting layer is not shown, but this is not limited in the embodiment of the present invention). Fig.12 yes Fig.11A schematic diagram of a cross-sectional structure of a part of the structure in the display module provided ( Fig.12 Can be Fig.11 A schematic diagram of the cross-sectional structure of the display module provided at A4-A4). The orthographic projection of the sealed cavity K1 on the back surface B2 of the display panel 11 is located outside the orthographic projection of the functional element 13 on the back surface B2 of the display panel 11, that is, there is no sealed cavity K1 in the area corresponding to the functional element 13, so that the sealed cavity K1 can be prevented from affecting the flatness of the area corresponding to the functional element 13, thereby preventing the functional element 13 from falling off and causing the functional element 13 to fail to work normally. The area corresponding to the functional element 13 can be provided with a sealing structure 126 to achieve flatness and airtightness, and the sealing structure 126 can include a sealant, or the sealing structure 126 can be formed by a hot pressing process. In addition, the orthographic projection of the functional element 13 on the second heat-conducting layer 123 can be located at the edge of the sealed cavity K1, so that on the basis of ensuring that there is no sealed cavity K1 in the area corresponding to the functional element 13, the distance between the functional element 13 and the heat-conducting liquid is closer, so that the heat of the functional element 13 can be absorbed and conducted by the heat-conducting liquid in time, thereby improving the thermal uniformity of the display module.

[0075] In addition, please refer to Fig.13 , Fig.13 It is a schematic diagram of the cross-sectional structure of another display module provided by an embodiment of the utility model. The display panel 11 includes a display area 111 and a non-display area 112, the non-display area 112 is bent to the back of the display area 11, and the non-display area 112 is bonded to the side of the composite structure 12 away from the display panel 11. The functional element 13 can be bound and connected to the display panel 11 on the non-display area 112. The display module may also include a circuit board 14, one end of the circuit board 14 is electrically connected to the display panel 11, and the other end of the circuit board 14 is electrically connected to other external components, so as to provide power and signals for the display module. The circuit board 14 is in contact with the side of the composite structure 12 away from the display panel 11. The orthographic projection of the sealed cavity K1 on the back of the display panel 11 may be located outside the non-display area 112 and the orthographic projection of the circuit board 14 on the back of the display panel 11. In this way, the flatness of the area where the non-display area 112 is bonded to the composite structure 12 and the flatness of the area where the circuit board 14 contacts the composite structure 12 can be ensured, thereby preventing the non-display area 112 and the circuit board 14 from falling off.

[0076] The display module 10 may further include a back film 15, a polarizer 16, an optical adhesive 17 and a cover plate 18. The back film 15 is located between the display panel 11 and the composite structure 12. The back film 15 may be used to protect the display panel 11. The back film 15 may include an organic film. Exemplarily, the back film 15 may include a polyethylene terephthalate (PET) film. The polarizer 16 is located on the side of the display panel 11 away from the composite structure 12. The polarizer 16 may be used to reduce the reflection of ambient light by the display panel 11. The optical adhesive 17 is located on the side of the polarizer 16 away from the display panel 11. The optical adhesive 17 may be used to bond the polarizer 16 to the cover plate 18. The cover plate 18 is located on the side of the optical adhesive 17 away from the polarizer 16. The cover plate 18 may be used to protect the display panel 11. Exemplarily, the cover plate 18 may include a glass cover plate.

[0077] Optionally, the composite structure further comprises at least one pipe, see Fig.14 and Fig.15 , Fig.14 Schematic diagram of a top view of a part of the structure of another display module provided by an embodiment of the utility model (to clearly illustrate the heat conduction structure, Fig.14 The first heat-conducting layer is not shown, but this is not limited in the embodiment of the present invention). Fig.15 yes Fig.14 A schematic diagram of a cross-sectional structure of a part of the structure in the display module provided ( Fig.15 Can be Fig.14 The composite structure 12 further comprises at least one pipe K4, exemplarily, Fig.12The composite structure 12 shown includes three pipes K4: a first pipe K41, a second pipe K42, and a third pipe K43. The first heat-conducting layer 122 and the second heat-conducting layer 123 respectively have openings corresponding to the pipe K4, one end of the pipe K4 is connected to the opening on the first heat-conducting layer 122, and the other end is connected to the opening on the second heat-conducting layer 123. The pipe K4 can correspond to other modules outside the display module, and the orthographic projection of the pipe K4 on the display panel overlaps with the orthographic projection of the corresponding other modules on the display panel, so that the composite structure 12 can avoid other modules through the pipe K4, thereby preventing the composite structure from affecting the normal operation of other modules. Exemplarily, the other modules may include at least one of a photosensitive module, a camera module, and a fingerprint unlocking module, the first pipe K41 may correspond to the photosensitive module, the second pipe K42 may correspond to the camera module, and the third pipe K43 may correspond to the fingerprint unlocking module. In addition, the composite structure 12 further includes a sealing structure 126 , which is bonded to the first heat conductive layer 122 and the second heat conductive layer 123 , respectively, and is also disposed around the pipe K4 , thereby preventing the pipe K4 from affecting the sealing performance of the sealing cavity K1 .

[0078] Optionally, the distance between the pipe K4 and the heat-conducting structure 125 ranges from 2 mm to 4 mm, so that the heat-conducting structure 125 can be prevented from being too close to the pipe K4, thereby preventing the heat-conducting structure 125 from affecting the normal operation of other modules, and preventing the heat-conducting structure 125 from affecting the sealing structure 126 around the pipe K4 to ensure the sealing of the sealing cavity K1.

[0079] In the above embodiment, the sealed cavity is an independent cavity, and the sealed cavity may also include other structures. For example, the sealed cavity may also include a plurality of sub-cavities, and the plurality of sub-cavities are interconnected, so that not only can the heat-conducting liquid be ensured to circulate between the plurality of sub-cavities to achieve the effect of heat dispersion, but also the reliability of the composite structure can be increased. In addition, the plurality of sub-cavities may also be provided with different heat-conducting structures to meet the heat conduction and heat dissipation requirements of different regions. For example, the sub-cavity corresponding to the region with greater heat dissipation requirements includes a denser protrusion structure. For example, the density of the protrusion structure in the sub-cavity may be positively correlated with the distance between the sub-cavity and the functional element. For example, the sealed cavity may include a first sub-cavity and a second sub-cavity, and the first sub-cavity is located on the side of the second sub-cavity close to the functional element. The density of the protrusion structure in the first sub-cavity may be greater than the density of the protrusion structure in the second sub-cavity, and the number of the protrusion structures in the first sub-cavity may be greater than the number of the protrusion structures in the second sub-cavity, or the spacing between the plurality of protrusion structures in the first sub-cavity may be smaller than the spacing between the plurality of protrusion structures in the second sub-cavity. In this way, the contact area between the protruding structure and the heat-conducting liquid in the sub-chamber closer to the functional element is larger, and the heat exchange is faster, so that the heat emitted by the functional element can be timely conducted to a position far away from the functional element. In addition, the sealed cavity can be divided into multiple sub-chambers in a variety of ways. For example, a partition structure can be formed when the first heat-conducting layer is formed. The partition structure can form multiple sub-chambers with the first heat-conducting layer and the second heat-conducting layer. The partition structure can include a heat-conducting material, and the partition structure can also conduct heat. The partition structure can be an integrated structure with the first heat-conducting layer and the heat-conducting structure, so that the process can be simplified.

[0080] In summary, the embodiment of the utility model provides a display module including a display panel, a composite structure and a functional element. The composite structure is located on the back of the display panel, and the composite structure includes an adhesive layer, a first heat-conducting layer, a second heat-conducting layer and a heat-conducting liquid. A sealed cavity is provided between the first heat-conducting layer and the second heat-conducting layer, and the heat-conducting liquid is located in the sealed cavity. The functional element is located on the side of the composite structure away from the display panel. When the functional element is working, it will emit heat, which can be absorbed by the second heat-conducting layer and conducted to the heat-conducting liquid. The heat-conducting liquid has fluidity, so the heat-conducting liquid can disperse the heat by flowing, thereby avoiding excessive local heat in the display module, and further increasing the life of the display module.

[0081] On the other hand, the present invention provides a display device, please refer to Fig.16 , Fig.16It is a structural schematic diagram of a display device provided in an embodiment of the utility model. The display device 20 includes at least one functional module 21 and the display module 10 of any of the above-mentioned embodiments. Since the display device 20 includes the display module 10 provided in the above-mentioned embodiment, the display device 20 can also have a similar effect, that is, the thermal uniformity and life of the display device 20 can be improved. The functional module 21 may include at least one of a photosensitive module, a camera module and a fingerprint unlocking module. The photosensitive module can sense light changes to adjust the brightness and contrast of the display device 20. The camera module can integrate an image sensor and an image processor so that it can capture, process and transmit image signals. The fingerprint unlocking module can collect, compare and identify fingerprints to realize identity authentication and unlocking functions.

[0082] Optionally, the composite structure 12 further comprises at least one pipe K4, Fig.16 The at least one pipe K4 shown includes a first pipe K41, and the first heat-conducting layer 122 and the second heat-conducting layer 123 respectively have openings corresponding to the pipe K4, one end of the pipe K4 is connected to the opening on the first heat-conducting layer 122, and the other end is connected to the opening on the second heat-conducting layer 123. At least one functional module 21 corresponds to at least one pipe K4, and the orthographic projection of at least one pipe K4 on the display panel 10 overlaps with the orthographic projection of the corresponding functional module 21 on the display panel 10. Therefore, the composite structure 12 can avoid at least one functional module 21 through the pipe K4, thereby preventing the composite structure 12 from affecting the normal operation of at least one functional module 21. Exemplarily, Fig.16 The functional module 21 shown includes a photosensitive module. The first pipe K41 corresponding to the photosensitive module can ensure the light transmittance of the area corresponding to the first pipe K41, thereby preventing the composite structure 12 from affecting the photosensitive module to sense light changes.

[0083] In addition, the functional module 21 can be located on a side of the composite structure 12 away from the display panel 11, and the heat generated by the functional module 21 during operation can also be absorbed and dispersed by the composite structure 12. The display device 20 can also include a power supply component, which can supply power to the display module 10. The power supply component can be located on a side of the composite structure 12 away from the display panel 11, and the heat generated by the power supply component during operation can also be absorbed and dispersed by the composite structure 12, so that the composite structure 12 can prevent the local heat of the display device 20 from being too high, thereby improving the life of the display device 20.

[0084] In summary, the embodiment of the utility model provides a display device including a display panel, a composite structure and a functional element. The composite structure is located on the back of the display panel, and the composite structure includes an adhesive layer, a first heat-conducting layer, a second heat-conducting layer and a heat-conducting liquid. A sealed cavity is provided between the first heat-conducting layer and the second heat-conducting layer, and the heat-conducting liquid is located in the sealed cavity. When the functional element is working, it will emit heat, and the heat can be absorbed by the second heat-conducting layer and conducted to the heat-conducting liquid. The heat-conducting liquid has fluidity, so the heat-conducting liquid can disperse the heat by flowing, thereby avoiding excessive local heat of the display module, and further increasing the life of the display module.

[0085] The term "and / or" in this utility model is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0086] In the present invention, the term "at least one of A and B" is only a description of the association relationship of the associated objects, indicating that there can be three kinds of relationships. For example, at least one of A and B can be represented by: A exists alone, A and B exist at the same time, and B exists alone. Similarly, "at least one of A, B, and C" means that there can be seven kinds of relationships, indicating: A exists alone, B exists alone, C exists alone, A and B exist at the same time, A and C exist at the same time, C and B exist at the same time, and A, B, and C exist at the same time.

[0087] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It is also understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it is understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it may be the only layer between the two layers or two elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0088] In the present invention, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more, unless otherwise clearly defined.

[0089] The above description is only an optional embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A display module, characterized in that: The display module comprises: A display panel, the display panel comprising a front side and a back side opposite to the front side; A composite structure, the composite structure is located on the back of the display panel, the composite structure comprises an adhesive layer, a first heat-conducting layer, a second heat-conducting layer and a heat-conducting liquid, the adhesive layer, the first heat-conducting layer and the second heat-conducting layer are stacked on the back of the display panel in a direction away from the display panel, a sealed cavity is provided between the first heat-conducting layer and the second heat-conducting layer, and the heat-conducting liquid is located in the sealed cavity; A functional element is located on a surface of the composite structure away from the display panel.

2. The display module according to claim 1, characterized in that: The composite structure further includes a heat-conducting structure, which is located in the sealed cavity and is in contact with the first heat-conducting layer and the second heat-conducting layer respectively.

3. The display module according to claim 2, characterized in that: The heat-conducting structure includes a plurality of protruding structures made of heat-conducting material, and the plurality of protruding structures are evenly distributed in the sealed cavity.

4. The display module according to claim 3, characterized in that: The protruding structure is cylindrical, and the diameter of the protruding structure ranges from 2 mm to 10 mm, and the distance between two adjacent protruding structures ranges from 2 mm to 5 mm.

5. The display module according to claim 3, characterized in that: The plurality of protrusion structures include a plurality of cylindrical first protrusion structures and a plurality of strip-shaped second protrusion structures. The plurality of first protrusion structures are respectively located on both sides of the plurality of second protrusion structures in a first direction, and the first direction is a direction parallel to a length direction of the second protrusion structures.

6. The display module according to claim 3, characterized in that: The plurality of protrusion structures include at least one of a first protrusion structure, a second protrusion structure, and a third protrusion structure; The first protrusion structure is a protrusion structure connected to the first heat-conducting layer, the second protrusion structure is a protrusion structure connected to the second heat-conducting layer, the third protrusion structure includes a first sub-protrusion structure and a second sub-protrusion structure, one end of the first sub-protrusion structure is connected to the first heat-conducting layer, and the other end is in contact with one end of the second sub-protrusion structure, and the other end of the second sub-protrusion structure is connected to the second heat-conducting layer.

7. The display module according to claim 2, characterized in that: The heat-conducting structure comprises a first retaining wall structure, and the orthographic projection of the first retaining wall structure on the first heat-conducting layer is spiral.

8. The display module according to claim 7, characterized in that: The heat conducting structure further includes a second retaining wall structure, the orthographic projection of the second retaining wall structure on the first heat conducting layer is spiral, the second retaining wall structure and the first retaining wall structure are nested with each other, and there is a specified distance between the second retaining wall structure and the first retaining wall structure.

9. The display module according to any one of claims 1 to 8, characterized in that: The orthographic projection of the sealed cavity on the back surface of the display panel is located outside the orthographic projection of the functional element on the back surface of the display panel.

10. The display module according to any one of claims 2 to 8, characterized in that: The composite structure further includes a sealing structure, which is bonded to the first heat-conducting layer and the second heat-conducting layer respectively to form the sealed cavity with the first heat-conducting layer and the second heat-conducting layer.

11. The display module according to claim 10, characterized in that: The sealing structure has a perfusion structure, which includes a recessed structure recessed toward the interior of the sealing cavity, and an extension structure located in the recessed structure and extending away from the interior of the sealing cavity. The extension structure and the first heat-conducting layer and the second heat-conducting layer form a perfusion channel, and the end of the perfusion channel away from the interior of the sealing cavity has a sealing cover.

12. The display module according to any one of claims 2 to 8, characterized in that: The composite structure also includes at least one pipe, the first heat-conducting layer and the second heat-conducting layer respectively have openings corresponding to the pipe, one end of the pipe is connected to the opening on the first heat-conducting layer, and the other end is connected to the opening on the second heat-conducting layer.

13. The display module according to claim 12, characterized in that: The distance between the pipeline and the heat-conducting structure ranges from 2 mm to 4 mm.

14. A display device, characterized in that: The display device comprises at least one functional module and the display module according to any one of claims 1 to 13.

15. The display device according to claim 14, characterized in that: The composite structure further includes at least one pipe, the first heat-conducting layer and the second heat-conducting layer respectively have openings corresponding to the pipe, one end of the pipe is connected to the opening on the first heat-conducting layer, and the other end is connected to the opening on the second heat-conducting layer; The at least one functional module corresponds to the at least one pipeline, and an orthographic projection of the at least one pipeline on the display panel overlaps with an orthographic projection of the corresponding functional module on the display panel.

Images