Display module and display device

Abstract

The utility model discloses a display module and a display device. The display module comprises a display panel, the display panel is provided with a display side and a back side, and the display side is opposite to the back side; the heat dissipation layer is located on the back side of the display panel, the heat dissipation layer comprises a first area and a second area, the first area is connected with the second area, and the first area is a stress action area in the preparation process of the display module; the elastic modulus of the first area of the heat dissipation layer is larger than that of the second area, or the elastic modulus of the first area of the heat dissipation layer is smaller than that of the second area. According to the display module, the supporting hardness or the stress absorption capacity of the first area of the heat dissipation layer can be improved, so that the supporting performance, the compression resistance, the scratch resistance and the deformation resistance of the first area of the heat dissipation layer under the stress effect are improved, and the poor film printing of the display module is improved or avoided.

Description

TECHNICAL FIELD

[0001] The embodiment of the present disclosure belongs to the technical field of display, and particularly relates to a display module and a display device. BACKGROUND

[0002] An OLED (Organic Light-Emitting Diode) display screen is widely concerned due to its advantages of self-luminous, low power consumption, thinness, flexibility, bright color, high contrast, fast response rate and the like. CONTENT

[0003] In a first aspect, the embodiment of the present disclosure provides a display module, comprising a display panel, the display panel has a display side and a back side, the display side and the back side are opposite to each other;

[0004] a heat dissipation layer located at the back side of the display panel, the heat dissipation layer comprises a first area and a second area, the first area and the second area are connected, and the first area is a stress action area in a preparation process of the display module;

[0005] The elastic modulus of the first area of the heat dissipation layer is greater than the elastic modulus of the second area, or the elastic modulus of the first area of the heat dissipation layer is less than the elastic modulus of the second area.

[0006] In some embodiments, the heat dissipation layer comprises a first sub-layer, a second sub-layer and a third sub-layer, the first sub-layer, the second sub-layer and the third sub-layer are sequentially stacked in a direction away from the display panel, and the orthographic projections of the first sub-layer, the second sub-layer and the third sub-layer on the display panel are coincident,

[0007] The elastic modulus of the second sub-layer is greater than the elastic modulus of the first sub-layer and the third sub-layer,

[0008] The second sub-layer comprises a first part located at the first area and a second part located at the second area,

[0009] The elastic modulus of the first part is greater than the elastic modulus of the second part.

[0010] In some embodiments, the material of the first part and the second part is the same,

[0011] The thickness of the first part is greater than the thickness of the second part,

[0012] The third sub-layer comprises a third part located at the first area and a fourth part located at the second area,

[0013] The material of the third part and the fourth part is the same,

[0014] The third portion has a thickness less than a thickness of the fourth portion.

[0015] In some embodiments, the first sub-layer includes a fifth portion located at the first region and a sixth portion located at the second region,

[0016] The fifth portion and the sixth portion are made of the same material,

[0017] The fifth portion has a thickness less than a thickness of the sixth portion.

[0018] In some embodiments, the first portion has a thickness 2-3 times a thickness of the second portion.

[0019] In some embodiments, the first portion has a thickness 3-5 times a thickness of the second portion,

[0020] The first portion has a thickness 2-3 times a thickness of the fifth portion.

[0021] In some embodiments, the first portion and the second portion are made of different materials,

[0022] The first portion and the second portion have the same thickness.

[0023] In some embodiments, the first sub-layer includes a fifth portion located at the first region and a sixth portion located at the second region,

[0024] The fifth portion has an elastic modulus greater than an elastic modulus of the sixth portion,

[0025] The fifth portion and the sixth portion have the same thickness.

[0026] In some embodiments, the first sub-layer includes a fifth portion located at the first region and a sixth portion located at the second region,

[0027] The fifth portion has an elastic modulus less than an elastic modulus of the sixth portion,

[0028] The fifth portion and the sixth portion have the same thickness.

[0029] In some embodiments, the heat dissipation layer includes a first sub-layer, a second sub-layer and a third sub-layer, the first sub-layer, the second sub-layer and the third sub-layer are sequentially stacked in a direction away from the display panel, and the first sub-layer, the second sub-layer and the third sub-layer have a same orthographic projection on the display panel,

[0030] The second sub-layer has an elastic modulus greater than elastic moduli of the first sub-layer and the third sub-layer,

[0031] The second sub-layer includes a first portion located at the first region and a second portion located at the second region,

[0032] the first part has an elastic modulus less than or equal to an elastic modulus of the second part,

[0033] the first part and the second part have a same thickness;

[0034] the first sub-layer includes a fifth part located at the first region and a sixth part located at the second region,

[0035] the fifth part has an elastic modulus less than an elastic modulus of the sixth part,

[0036] the fifth part and the sixth part have a same thickness.

[0037] In some embodiments, the heat dissipation layer further includes a fourth sub-layer located between the first sub-layer and the display panel, and a normal projection of the fourth sub-layer and the first sub-layer on the display panel is coincident;

[0038] the fourth sub-layer and the sixth part are made of a same material.

[0039] In some embodiments, the heat dissipation layer includes a first sub-layer, a second sub-layer and a third sub-layer, the first sub-layer, the second sub-layer and the third sub-layer are sequentially stacked in a direction away from the display panel, and a normal projection of the first sub-layer, the second sub-layer and the third sub-layer on the display panel is coincident,

[0040] the second sub-layer has an elastic modulus greater than elastic moduli of the first sub-layer and the third sub-layer,

[0041] the second sub-layer includes a first part located at the first region and a second part located at the second region,

[0042] the first sub-layer includes a fifth part located at the first region and a sixth part located at the second region,

[0043] a side of the fifth part close to the first part is provided with a plurality of recessed structures,

[0044] the plurality of recessed structures and the first part enclose a first gap therebetween.

[0045] In some embodiments, a side of the first part close to the fifth part is provided with a plurality of protruding structures,

[0046] the plurality of protruding structures and the plurality of recessed structures enclose a second gap therebetween.

[0047] In some embodiments, a side surface of the third sub-layer away from the display panel is flush.

[0048] In some embodiments, the material of the first part includes any one of copper, iron, stainless steel, alloy steel, aluminum alloy, silica gel,

[0049] The material of the second part includes copper.

[0050] In some embodiments, the material of the fifth part includes liquid silica gel, liquid optical glue or air;

[0051] The material of the sixth part includes foam glue.

[0052] In a second aspect, the embodiments of the present disclosure provide a display device, comprising the display module.

[0053] The display module provided by the embodiments of the present disclosure can improve the support hardness of the first area of the heat dissipation layer by making the elastic modulus of the first area of the heat dissipation layer greater than the elastic modulus of the second area, thereby improving the support performance and the anti-pressure, anti-scratching and anti-deformation ability of the first area of the heat dissipation layer under stress, and further improving or avoiding the film printing defect of the display module; the display module can improve the stress absorption ability of the first area of the heat dissipation layer by making the elastic modulus of the first area of the heat dissipation layer less than the elastic modulus of the second area, thereby improving or avoiding the film printing defect of the display module caused by stress, and improving the appearance effect of the display module.

[0054] The display device provided by the embodiments of the present disclosure can improve or avoid the film printing defect of the display device caused by stress by adopting the display module in the above embodiments, and improve the appearance effect of the display device. BRIEF DESCRIPTION OF DRAWINGS

[0055] The accompanying drawings are included to provide a further understanding of the embodiments of the present disclosure, and constitute a part of the specification, which are used to explain the present disclosure together with the embodiments of the present disclosure, and do not constitute a limitation of the present disclosure. The above and other features and advantages will become more apparent from the detailed description of the specific example embodiments, with reference to the accompanying drawings, in which:

[0056] Figure 1a A schematic diagram of a screen film printing defect caused by the lamination of a support in a module process stage in the related art.

[0057] Figure 1b A schematic diagram of a module printing defect of an OLED display module in the related art.

[0058] Figure 2 A cross-sectional schematic diagram of a display module in the embodiments of the present disclosure.

[0059] Figure 3 A cross-sectional schematic diagram of another display module in the embodiments of the present disclosure.

[0060] Figure 4FIG. 6 is a cross-sectional schematic view of still another display module in accordance with an embodiment of the present disclosure.

[0061] Figure 5 FIG. 7 is a cross-sectional schematic view of still another display module in accordance with an embodiment of the present disclosure.

[0062] Figure 6 FIG. 8 is a schematic view of a structural change of still another display module in accordance with an embodiment of the present disclosure when a support is attached.

[0063] Figure 7 FIG. 9 is a cross-sectional schematic view of still another display module in accordance with an embodiment of the present disclosure.

[0064] Figure 8 FIG. 10 is a cross-sectional schematic view of still another display module in accordance with an embodiment of the present disclosure. DETAILED DESCRIPTION

[0065] In order for those skilled in the art to better understand the technical solutions of the embodiments of the present disclosure, a display module and a display device provided by the embodiments of the present disclosure are further described in detail below with reference to the drawings and specific embodiments.

[0066] In the following, the embodiments of the present disclosure will be described more fully with reference to the accompanying drawings, of which embodiments shown should not be construed as limiting the present disclosure, which is set forth in the claims. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0067] The embodiments of the present disclosure are not limited to the embodiments shown in the drawings, but include modifications of configurations formed based on manufacturing processes. Therefore, the regions exemplified in the drawings have a schematic property, and the shape of the regions shown in the drawings exemplifies the specific shape of the regions, but is not intended to be limiting.

[0068] At present, a common problem of OLED display products is screen film printing. Most screen film printing occurs because the heat dissipation layer (SCF) provided on the back side of the OLED display screen is pressed, and the heat dissipation layer is usually pressed by the attachment of the support in the module process stage or the tearing-off process of the support in the whole machine assembly stage. For example, Figure 1a FIG. 5 shows an example of screen film printing defect caused by the attachment of the support in the module process stage.

[0069] In the related art, for example, Figure 1bAs shown, the OLED display module includes a display screen 5, a back film 3 and a heat dissipation layer 2 which are sequentially stacked at the back side of the display screen 5, and the heat dissipation layer 2 is sequentially stacked by a foam adhesive 2a, a copper foil 2b and a protective film 2c. Among them, the thickness of the display screen 5 is 0.038 mm; the thickness of the back film 3 is 0.088 mm; the thickness of the foam adhesive 2a is 0.15 mm; the thickness of the copper foil 2b is 0.03 mm; and the thickness of the protective film 2c is 0.1 mm. Because the copper foil 2b is too thin and has no supporting property, when the support 4 is attached, the copper foil 2b and the foam adhesive 2a are first deformed and collapsed, thereby causing the display screen 5 to be stressed and resulting in film printing.

[0070] The support 4 is an indispensable protection for protecting the bending area of the OLED display screen and the IC (driving circuit) device, and cannot be cancelled. Therefore, improving the pressure resistance level or stress absorption level of the heat dissipation layer 2 corresponding to the attached area of the support 4 is a direct and effective measure to solve the film printing of the screen.

[0071] In order to solve the above problems in the related art, in a first aspect, the embodiments of the present disclosure provide a display module, such as Figures 2-8 As shown, the display module includes a display panel 1, the display panel 1 has a display side and a back side, the display side and the back side are opposite, a heat dissipation layer 2 is located at the back side of the display panel 1, the heat dissipation layer 2 includes a first area 201 and a second area 202, the first area 201 and the second area 202 are connected, the first area 201 is a stress action area in the preparation process of the display module; the elastic modulus of the first area 201 of the heat dissipation layer 2 is greater than the elastic modulus of the second area 202, or the elastic modulus of the first area 201 of the heat dissipation layer 2 is less than the elastic modulus of the second area 202.

[0072] Among them, the display panel 1 can be an OLED display panel. The side of the first area 201 of the heat dissipation layer 2 away from the display panel 1 is used to install the support 4 in the module process stage or to tear off the support 4 in the whole machine assembly stage, and the area of the first area 201 of the heat dissipation layer 2 is greater than or equal to the contact area with the support 4.

[0073] By making the elastic modulus of the first area 201 of the heat dissipation layer 2 greater than the elastic modulus of the second area 202, the support hardness of the first area 201 of the heat dissipation layer 2 can be improved, thereby improving the support performance and the anti-pressure, anti-scratching and anti-deformation ability of the first area 201 of the heat dissipation layer 2 under stress, and further improving or avoiding the film printing defect of the display module; by making the elastic modulus of the first area 201 of the heat dissipation layer 2 less than the elastic modulus of the second area 202, the stress absorption ability of the first area 201 of the heat dissipation layer 2 can be improved, thereby improving or avoiding the film printing defect of the display module caused by stress, and improving the appearance effect of the display module.

[0074] In some embodiments, as Figure 2As shown, the heat dissipation layer 2 includes a first sub-layer 21, a second sub-layer 22 and a third sub-layer 23, the first sub-layer 21, the second sub-layer 22 and the third sub-layer 23 are sequentially stacked in a direction away from the display panel 1, and the orthographic projections of the first sub-layer 21, the second sub-layer 22 and the third sub-layer 23 on the display panel 1 coincide, the elastic modulus of the second sub-layer 22 is greater than the elastic modulus of the first sub-layer 21 and the third sub-layer 23, and the second sub-layer 22 includes a first part 221 located in the first area 201 and a second part 222 located in the second area 202, and the elastic modulus of the first part 221 is greater than the elastic modulus of the second part 222.

[0075] The hardness of the second sub-layer 22 is higher than the hardness of the first sub-layer 21 and the third sub-layer 23, so that the supporting performance and the pressure and scratch resistance of the second sub-layer 22 are better than those of the first sub-layer 21 and the third sub-layer 23. The hardness of the first part 221 is higher than the hardness of the second part 222, so that the supporting performance and the pressure and scratch resistance of the first part 221 are better than those of the second part 222, and thus the hardness, the supporting performance and the pressure and scratch resistance of the first area 201 of the heat dissipation layer 2 are better than those of the second area 202, which improves or avoids film printing defects in the area of the display panel 1 corresponding to the first area 201 of the heat dissipation layer 2.

[0076] In some embodiments, as shown, Figure 2 The first part 221 and the second part 222 are made of the same material, the thickness of the first part 221 is greater than the thickness of the second part 222, and the third sub-layer 23 includes a third part 231 located in the first area 201 and a fourth part 232 located in the second area 202, the third part 231 and the fourth part 232 are made of the same material, and the thickness of the third part 231 is less than the thickness of the fourth part 232.

[0077] The hardness, the supporting performance and the pressure and scratch resistance of the first part 221 are better than those of the second part 222 by making the thickness of the first part 221 greater than the thickness of the second part 222, so that the hardness, the supporting performance and the pressure and scratch resistance of the first area 201 of the heat dissipation layer 2 are better than those of the second area 202, which improves or avoids film printing defects in the area of the display panel 1 corresponding to the first area 201 of the heat dissipation layer 2. By making the thickness of the third part 231 less than the thickness of the fourth part 232, the surface of the heat dissipation layer 2 away from or close to the display panel 1 tends to be flat on the basis of increasing the thickness of the first part 221, so that film printing defects generated in the process of attaching the heat dissipation layer 2 to the back side of the display panel 1 are improved or avoided.

[0078] In some embodiments, the thickness of the first part 221 is 2-3 times the thickness of the second part 222. For example, the thickness of the second part 222 is 0.03 mm, the thickness of the first part 221 is 0.08 mm, the thickness of the fourth part 232 is 0.1 mm, and the thickness of the third part 231 is 0.05 mm. In this way, on the one hand, the first area 201 of the heat dissipation layer 2 has certain supporting performance and anti-pressure, anti-scratching and anti-deformation ability; on the other hand, the side surface of the heat dissipation layer 2 away from the display panel 1 is also ensured to be flush.

[0079] In some embodiments, as shown in FIG. 2, Figure 3 on the basis of the display module structure described above, Figure 2 the first sub-layer 21 includes a fifth part 211 located in the first area 201 and a sixth part 212 located in the second area 202, the materials of the fifth part 211 and the sixth part 212 are the same, and the thickness of the fifth part 211 is less than the thickness of the sixth part 212.

[0080] In this way, the thickness of the first part 221 can be further increased, and in the case of further increasing the thickness of the first part 221, the side surface of the heat dissipation layer 2 away from or close to the display panel 1 tends to be flat, thereby improving or avoiding the film printing defect generated in the process of bonding the heat dissipation layer 2 to the back side of the display panel 1.

[0081] In some embodiments, the thickness of the first part 221 is 3-5 times the thickness of the second part 222, and the thickness of the first part 221 is 2-3 times the thickness of the fifth part 211. For example, the thickness of the second part 222 is 0.03 mm, the thickness of the first part 221 is 0.15 mm, the thickness of the fourth part 232 is 0.1 mm, and the thickness of the third part 231 is 0.05 mm; the thickness of the fifth part 211 is 0.08 mm, and the thickness of the sixth part 212 is 0.15 mm. In this way, on the one hand, the supporting performance and anti-pressure, anti-scratching and anti-deformation ability of the first area 201 of the heat dissipation layer 2 are further increased; on the other hand, the side surface of the heat dissipation layer 2 away from the display panel 1 is also ensured to be flush.

[0082] In some embodiments, as shown in FIG. 2, Figure 2 and Figure 3 the second sub-layer 22 is made of copper foil, the first sub-layer 21 is made of foam glue, and the third sub-layer 23 is made of thermoplastic polyester material.

[0083] In some embodiments, as shown in FIG. 2, Figure 4As shown, the material of the first part 221 is different from the material of the second part 222, and the thickness of the first part 221 is the same as the thickness of the second part 222. In this way, the hardness of the material of the first part 221 is higher than the hardness of the material of the second part 222 in the case of the same thickness, so that the hardness, support performance and compression, scratch and deformation resistance of the first area 201 of the heat dissipation layer 2 are better than those of the second area 202, and thus the film printing defect of the area of the display panel 1 corresponding to the first area 201 of the heat dissipation layer 2 can be improved or avoided.

[0084] In some embodiments, as shown in Figure 4 the material of the first part 221 includes any one of iron, stainless steel, alloy steel, aluminum alloy and silica gel, and the material of the second part 222 includes copper. The materials of the first sub-layer 21 and the third sub-layer 23 are the same as those in Figure 2 and Figure 3 the scheme.

[0085] In some embodiments, as shown in Figure 5 the first sub-layer 21 includes a fifth part 211 located in the first area 201 and a sixth part 212 located in the second area 202, the elastic modulus of the fifth part 211 is greater than the elastic modulus of the sixth part 212, and the thickness of the fifth part 211 is the same as the thickness of the sixth part 212; the heat dissipation layer 2 further includes a fourth sub-layer 24 located between the first sub-layer 21 and the display panel 1, the orthographic projection of the fourth sub-layer 24 and the first sub-layer 21 on the display panel 1 is coincident; the material of the fourth sub-layer 24 is the same as the material of the sixth part 212.

[0086] In some embodiments, as shown in Figure 5 on the basis of the display module structure in Figure 4 the hardness of the material of the fifth part 211 is higher than the hardness of the material of the sixth part 212 in the case of the same thickness, so that the hardness, support performance and compression, scratch and deformation resistance of the first area 201 of the heat dissipation layer 2 are further better than those of the second area 202, and thus the film printing defect of the area of the display panel 1 corresponding to the first area 201 of the heat dissipation layer 2 can be further improved or avoided.

[0087] In some embodiments, as shown in Figure 5 the fifth part 211 is made of resin or plastic, and the sixth part 212 and the fourth sub-layer 24 are both made of foam rubber. The materials of other film layers in this embodiment are the same as those in Figure 4 the scheme.

[0088] In some embodiments, as shown in Figure 6As shown, the first sublayer 21 includes a fifth portion 211 located in the first area 201 and a sixth portion 212 located in the second area 202, the elastic modulus of the fifth portion 211 is smaller than the elastic modulus of the sixth portion 212, and the thickness of the fifth portion 211 and the sixth portion 212 are the same; the heat dissipation layer 2 also includes a fourth sublayer 24, which is located between the first sublayer 21 and the display panel 1, and the orthographic projections of the fourth sublayer 24 and the first sublayer 21 on the display panel 1 coincide; the fourth sublayer 24 and the sixth portion 212 are made of the same material.

[0089] In some embodiments, as Figure 6 As shown, the heat dissipation layer 2 includes a first sublayer 21, a second sublayer 22, and a third sublayer 23. The first sublayer 21, the second sublayer 22, and the third sublayer 23 are stacked in sequence in a direction away from the display panel 1, and the orthographic projections of the first sublayer 21, the second sublayer 22, and the third sublayer 23 on the display panel 1 coincide with each other. The elastic modulus of the second sublayer 22 is greater than the elastic moduli of the first sublayer 21 and the third sublayer 23. The second sublayer 22 includes a first portion 221 located in the first area 201 and a second portion 222 located in the second area 202. The elastic modulus of the first portion 221 is less than or equal to that of the second sublayer 222. The elastic modulus of the second part 222, the thickness of the first part 221 and the second part 222 are the same; the first sublayer 21 includes the fifth part 211 located in the first area 201 and the sixth part 212 located in the second area 202, the elastic modulus of the fifth part 211 is smaller than the elastic modulus of the sixth part 212, and the thickness of the fifth part 211 and the sixth part 212 are the same; the heat dissipation layer 2 also includes a fourth sublayer 24, which is located between the first sublayer 21 and the display panel 1, and the orthographic projections of the fourth sublayer 24 and the first sublayer 21 on the display panel 1 coincide; the materials of the fourth sublayer 24 and the sixth part 212 are the same.

[0090] Among them, Figure 6 As shown, when stress acts on the first area 201, the first portion 221 is first subjected to stress and then the stress is transferred to the fifth portion 211. The fifth portion 211 can absorb the stress better than the sixth portion 212, thereby reducing or avoiding the stress from being transferred to the display panel 1, thereby improving or avoiding the occurrence of poor film printing in the area of ​​the display panel 1 corresponding to the first area 201 of the heat dissipation layer 2.

[0091] In some embodiments, as Figure 6 As shown, the material of the fifth part 211 includes liquid silicone, liquid optical glue or air; the material of the sixth part 212 includes foam glue. The material of the fifth part 211 can be any soft and easily deformable material. In some embodiments, the materials of the first part 221 and the second part 222 are the same. Figure 4The same as the scheme, the elastic modulus of the first part 221 is greater than that of the second part 222. In some embodiments, the first part 221 and the second part 222 can also adopt the same material, that is, the elastic modulus of the first part 221 and the second part 222 can be the same, such as both the first part 221 and the second part 222 adopting copper. In some embodiments, the first part 221 can adopt a thermoplastic polyester material, and the second part 222 adopts a copper foil, that is, the elastic modulus of the first part 221 is less than that of the second part 222.

[0092] In some embodiments, as shown in Figure 7 The heat dissipation layer 2 includes a first sub-layer 21, a second sub-layer 22, and a third sub-layer 23, which are sequentially stacked in a direction away from the display panel 1, and the orthographic projections of the first sub-layer 21, the second sub-layer 22, and the third sub-layer 23 on the display panel 1 coincide, the elastic modulus of the second sub-layer 22 is greater than that of the first sub-layer 21 and the third sub-layer 23, the second sub-layer 22 includes a first part 221 located in the first area 201 and a second part 222 located in the second area 202, the first sub-layer 21 includes a fifth part 211 located in the first area 201 and a sixth part 212 located in the second area 202, a side of the fifth part 211 close to the first part 221 is provided with a plurality of recess structures A, and the plurality of recess structures A and the first part 221 surround a first gap B.

[0093] When stress acts on the first area 201, the first part 221 is first compressed, the first part 221 and the fifth part 211 extrude each other to deform the first gap B, and the gas in the first gap B is compressed to absorb stress, thereby reducing or avoiding stress transmission to the display panel 1, and improving or avoiding film printing defects in the area of the display panel 1 corresponding to the first area 201 of the heat dissipation layer 2.

[0094] In some embodiments, the recess structure A can be a groove or a pit. The first gap B can be filled with air or a soft and easily deformed material, such as liquid silicone or liquid optical glue.

[0095] In some embodiments, as shown in Figure 8 A side of the first part 221 close to the fifth part 211 is provided with a plurality of protruding structures C, and the plurality of protruding structures C and the plurality of recess structures A surround a second gap D.

[0096] The second gap D is larger in space than the first gap B. When stress acts on the first area 201, the first part 221 is first compressed, the first part 221 and the fifth part 211 extrude each other to deform the second gap D, and the gas in the second gap D is compressed to absorb stress, thereby reducing or avoiding stress transmission to the display panel 1, and improving or avoiding film printing defects in the area of the display panel 1 corresponding to the first area 201 of the heat dissipation layer 2.

[0097] In some embodiments, the convex structure C can be of any shape, such as a convex strip or a convex block, etc. The second gap D can be filled with air or a soft and easily deformable material, such as liquid silicone or liquid optical glue, etc. to some extent, so as to absorb stress and reduce or avoid stress transmission to the display panel 1, thereby improving or avoiding film printing defects in the area of the first area 201 of the corresponding heat dissipation layer 2 of the display panel 1.

[0098] In some embodiments, the side surface of the third sub-layer 23 away from the display panel 1 is flush. In this way, film printing defects generated during the process of attaching the heat dissipation layer 2 to the back side of the display panel 1 can be improved or avoided.

[0099] In some embodiments, as shown in FIG. 1, the display module further includes a back film 3 located between the heat dissipation layer 2 and the display panel 1, and the orthographic projection of the back film 3 and the heat dissipation layer 2 on the display panel 1 covers the back side of the display panel 1. Figures 2-8

[0100] In some embodiments, the back film 3 is formed by stacking barrier films, conductive films, heat dissipation films, reflective films, etc. The barrier film can prevent water vapor and oxygen from entering the inside of the display panel 1. The heat dissipation film can dissipate heat. The conductive film can provide electrical conductivity to ensure the normal operation of the display panel 1. The reflective film can increase the brightness of the display screen and reduce the interference of external light, etc.

[0101] The display module provided in the embodiments can improve the support hardness of the first area of the heat dissipation layer by making the elastic modulus of the first area of the heat dissipation layer greater than the elastic modulus of the second area, thereby improving the support performance and the pressure resistance, scratch resistance and deformation resistance of the first area of the heat dissipation layer under stress, and further improving or avoiding film printing defects of the display module. The display module can improve the stress absorption capacity of the first area of the heat dissipation layer by making the elastic modulus of the first area of the heat dissipation layer less than the elastic modulus of the second area, thereby improving or avoiding film printing defects of the display module caused by stress and improving the appearance effect of the display module.

[0102] In a second aspect, the embodiments of the present disclosure provide a display device, which includes the display module in the above embodiments.

[0103] By using the display module in the above embodiments, film printing defects of the display device caused by stress can be improved or avoided, and the appearance effect of the display device can be improved.

[0104] The display device provided in the embodiments of the present disclosure can be an OLED panel, an OLED television, an OLED billboard, a display, a mobile phone, a navigator, or any product or component with a display function.

[0105] ​It is understood that the above embodiments are only exemplary for illustrating the principles of the present disclosure, and the present disclosure is not limited thereto. Various modifications and improvements can be made by those of ordinary skill in the art without departing from the spirit and essence of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A display module comprising a display panel, wherein the display panel has a display side and a back side, the display side and the back side being opposite to each other; a heat dissipation layer, located on the back side of the display panel, the heat dissipation layer including a first area and a second area, the first area and the second area being connected, the first area being a stress action area during the preparation of the display module; It is characterized by: The elastic modulus of the first region of the heat dissipation layer is greater than the elastic modulus of the second region, or the elastic modulus of the first region of the heat dissipation layer is smaller than the elastic modulus of the second region.

2. The display module according to claim 1, wherein: The heat dissipation layer includes a first sublayer, a second sublayer, and a third sublayer, wherein the first sublayer, the second sublayer, and the third sublayer are stacked in sequence in a direction away from the display panel, and the orthographic projections of the first sublayer, the second sublayer, and the third sublayer on the display panel coincide with each other. The elastic modulus of the second sublayer is greater than the elastic modulus of the first sublayer and the third sublayer, The second sublayer includes a first portion located in the first region and a second portion located in the second region, The elastic modulus of the first portion is greater than the elastic modulus of the second portion.

3. The display module according to claim 2, wherein: The first part and the second part are made of the same material, The thickness of the first portion is greater than the thickness of the second portion, The third sublayer includes a third portion located in the first region and a fourth portion located in the second region, The materials of the third and fourth parts are the same, The thickness of the third portion is smaller than the thickness of the fourth portion.

4. The display module according to claim 3, wherein: The first sublayer includes a fifth portion located in the first region and a sixth portion located in the second region, The materials of the fifth and sixth parts are the same, The thickness of the fifth portion is smaller than the thickness of the sixth portion.

5. The display module according to claim 3, wherein: The thickness of the first portion is 2 to 3 times the thickness of the second portion.

6. The display module according to claim 4, wherein: The thickness of the first part is 3 to 5 times the thickness of the second part. The thickness of the first portion is 2 to 3 times the thickness of the fifth portion.

7. The display module according to claim 2, wherein: The first part and the second part are made of different materials, The first portion and the second portion have the same thickness.

8. The display module according to claim 7, wherein: The first sublayer includes a fifth portion located in the first region and a sixth portion located in the second region, The elastic modulus of the fifth portion is greater than the elastic modulus of the sixth portion, The fifth portion and the sixth portion have the same thickness.

9. The display module according to claim 7, wherein: The first sublayer includes a fifth portion located in the first region and a sixth portion located in the second region, The elastic modulus of the fifth portion is smaller than the elastic modulus of the sixth portion, The fifth portion and the sixth portion have the same thickness.

10. The display module according to claim 1, wherein: The heat dissipation layer includes a first sublayer, a second sublayer, and a third sublayer, wherein the first sublayer, the second sublayer, and the third sublayer are stacked in sequence in a direction away from the display panel, and the orthographic projections of the first sublayer, the second sublayer, and the third sublayer on the display panel coincide with each other. The elastic modulus of the second sublayer is greater than the elastic modulus of the first sublayer and the third sublayer, The second sublayer includes a first portion located in the first region and a second portion located in the second region, The elastic modulus of the first portion is less than or equal to the elastic modulus of the second portion, The first portion and the second portion have the same thickness; The first sublayer includes a fifth portion located in the first region and a sixth portion located in the second region, The elastic modulus of the fifth portion is smaller than the elastic modulus of the sixth portion, The fifth portion and the sixth portion have the same thickness.

11. The display module according to any one of claims 8 to 10, characterized in that: The heat dissipation layer further includes a fourth sublayer located between the first sublayer and the display panel, wherein the orthographic projections of the fourth sublayer and the first sublayer on the display panel coincide with each other; The fourth sub-layer and the sixth portion are made of the same material.

12. The display module according to claim 1, wherein: The heat dissipation layer includes a first sublayer, a second sublayer, and a third sublayer, wherein the first sublayer, the second sublayer, and the third sublayer are stacked in sequence in a direction away from the display panel, and the orthographic projections of the first sublayer, the second sublayer, and the third sublayer on the display panel coincide with each other. The elastic modulus of the second sublayer is greater than the elastic modulus of the first sublayer and the third sublayer, The second sublayer includes a first portion located in the first region and a second portion located in the second region, The first sublayer includes a fifth portion located in the first region and a sixth portion located in the second region, The fifth portion has a plurality of recessed structures on one side close to the first portion. A first gap is formed between the plurality of recessed structures and the first portion.

13. The display module according to claim 12, wherein: A plurality of protrusion structures are provided on one side of the first portion close to the fifth portion. A second gap is formed between the plurality of protruding structures and the plurality of recessed structures.

14. The display module according to any one of claims 2-10, 12-13, characterized in that: A surface of the third sublayer facing away from the display panel is flush.

15. The display module according to claim 2, wherein: The material of the first part includes any one of copper, iron, stainless steel, alloy steel, aluminum alloy, and silicone rubber. The material of the second portion includes copper.

16. The display module according to claim 9 or 10, characterized in that: The material of the fifth part includes liquid silicone, liquid optical glue or air; The material of the sixth part includes foam glue.

17. A display device, characterized in that: A display module comprising any one of claims 1-16.

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