Display module and display device

Abstract

A display module and a display device. The display module comprises a display panel, the display panel has a display side and a back side, the display side and the back side are opposite, the display panel comprises a first flat area, a bending area and a second flat area, the bending area is located between the first flat area and the second flat area, and the bending area is connected with the first flat area and the second flat area respectively; further comprising a first support layer located on the back side of the display panel, the first support layer comprises two or more strip structures, the orthographic projection of the strip structure on the display panel extends from the bending area to the edge corner position of the first flat area and the second flat area away from the bending area. The crease of the display module in the bending state can be completely flattened, thereby improving the display effect of the display module.

Description

Technical Field

[0001] This disclosure pertains to the field of display technology, specifically relating to a display module and a display device. Background Technology

[0002] OLED (Organic Light-Emitting Diode) displays have attracted widespread attention due to their advantages such as self-illumination, low power consumption, thinness, flexibility, vibrant colors, high contrast, and fast response speed. Summary of the Invention

[0003] This disclosure provides a display module and a display device. The display module includes a display panel having a display side and a back side, the display side and the back side being opposite to each other. The display panel includes a first flattening area, a bending area, and a second flattening area, the bending area being located between the first flattening area and the second flattening area, and the bending area being respectively connected to the first flattening area and the second flattening area.

[0004] It also includes a first support layer located on the back side of the display panel.

[0005] The first support layer includes two or more strip structures, the orthographic projection of which on the display panel extends from the bending area to the corner of the first flattened area away from the bending area and the corner of the second flattened area away from the bending area.

[0006] In some embodiments, the first support layer includes a first strip structure and a second strip structure.

[0007] The first strip structure and the second strip structure intersect, and the orthographic projection of the intersection position on the display panel is located in the bending area.

[0008] The end of the first strip structure is located at a diagonal position formed by one corner of the first flattened area and one corner of the second flattened area.

[0009] The end of the second strip structure is located at another diagonal position formed by the other corner of the first flattened area and the other corner of the second flattened area.

[0010] In some embodiments, a first groove is formed on the side of the first strip structure opposite to the display panel, and a second groove is formed on the side of the second strip structure opposite to the display panel.

[0011] The first support layer further includes a first heat dissipation structure and a second heat dissipation structure, wherein the first heat dissipation structure is located in the first groove and the second heat dissipation structure is located in the second groove.

[0012] In some embodiments, the surfaces of the first heat dissipation structure and the first strip structure opposite to the display panel are flush.

[0013] The second heat dissipation structure and the second strip structure are flush with the side surface opposite to the display panel.

[0014] In some embodiments, a first gap is spaced between the first heat dissipation structure and the sidewall of the first groove, the size of the first gap being 0.3 to 0.6 mm;

[0015] A second gap is spaced between the second heat dissipation structure and the sidewall of the second groove, the size of which ranges from 0.3 to 0.6 mm.

[0016] In some embodiments, the materials of the first heat dissipation structure and the second heat dissipation structure include graphite.

[0017] In some embodiments, the first strip structure includes a first portion located between an end of the first strip structure and its intersection with the second strip structure;

[0018] The second strip structure includes a second part located between the end of the second strip structure and its intersection with the first strip structure;

[0019] The orthographic projection shapes of the first and second parts on the display panel include a wavy shape;

[0020] The width of the orthographic projection of the first part on the display panel is smaller than the width of the orthographic projection of the other parts of the first strip structure on the display panel;

[0021] The width of the orthographic projection of the second part on the display panel is smaller than the width of the orthographic projection of the other parts of the second strip structure on the display panel.

[0022] In some embodiments, a third groove is provided on the side of the intersection region of the first strip structure and the second strip structure that is close to or far from the display panel;

[0023] Alternatively, multiple through holes may be provided at the intersection of the first strip structure and the second strip structure, and the multiple through holes may be evenly distributed at the intersection of the first strip structure and the second strip structure.

[0024] In some embodiments, the orthographic projection shape of the distribution area of ​​the third groove or the plurality of through holes on the display panel includes a spindle shape or a straight line shape.

[0025] In some embodiments, the materials of the first strip structure and the second strip structure include metallic materials;

[0026] The thickness of the first strip structure and the second strip structure is greater than 10 μm.

[0027] In some embodiments, the first support layer further includes a first adhesive layer located between the first strip structure and the display panel, and between the second strip structure and the display panel.

[0028] The orthographic projection of the first adhesive layer on the display panel lies within the orthographic projection areas of the first strip structure and the second strip structure on the display panel.

[0029] The first adhesive layer does not overlap with the orthographic projection of the intersection of the first strip structure and the second strip structure on the display panel, and the first adhesive layer overlaps at least with the orthographic projection of the ends of the first strip structure and the second strip structure on the display panel.

[0030] In some embodiments, the thickness of the first adhesive layer ranges from 20 to 30 μm;

[0031] The adhesive strength of the first adhesive layer is >2000gf / inch.

[0032] In some embodiments, the first support layer further includes a second adhesive layer located between the first groove and the first heat dissipation structure, and between the second groove and the second heat dissipation structure.

[0033] The orthographic projection of the second adhesive layer on the display panel lies within the orthographic projection area of ​​the first heat dissipation structure and the second heat dissipation structure on the display panel.

[0034] The second adhesive layer does not overlap with the orthographic projection of the intersection of the first strip structure and the second strip structure on the display panel, and the second adhesive layer overlaps at least with the orthographic projection of the ends of the first heat dissipation structure and the second heat dissipation structure on the display panel.

[0035] In some embodiments, a second support layer is further included, located between the display panel and the first support layer, and the second support layer covers the back side of the display panel.

[0036] The bending area includes a first sub-area, a second sub-area, and a third sub-area. The second sub-area is located between the first sub-area and the third sub-area, and the three are connected sequentially. The first sub-area is connected to the first flattening area, and the third sub-area is connected to the second flattening area.

[0037] The thickness of the region of the second support layer that overlaps with the first sub-region and the third sub-region is less than the thickness of other regions of the second support layer.

[0038] Multiple holes are formed in the area where the second support layer overlaps with the second sub-region, and the multiple holes are evenly distributed.

[0039] This disclosure also provides a display device, which includes the above-described display module.

[0040] The beneficial effects of the present invention are as follows: The display module provided by the present invention has a rebound force that restores its original shape when the strip structure is bent along the bending area of ​​the display panel. By extending the orthographic projection of the strip structure on the display panel from the bending area to the corners of the first and second flattening areas away from the bending area, the rebound force of the strip structure will pull itself back to its original shape in the flattened state during the process of the bending area of ​​the display panel changing from a bent state to a flattened state. This will pull the corners of the display panel to completely flatten the creases in the bent state, thereby allowing the display panel to return from a bent state to a completely flattened state, ultimately improving the display effect of the display module.

[0041] The display device provided by the present invention, by employing the above-mentioned display module, enables the display device to completely flatten the creases during bending and unfolding, thereby ultimately improving the display effect of the display device. Attached Figure Description

[0042] The accompanying drawings are provided to further illustrate the embodiments of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the disclosure and do not constitute a limitation thereof. The above and other features and advantages will become more apparent to those skilled in the art from the detailed description of exemplary embodiments with reference to the accompanying drawings, in which:

[0043] Figure 1 This is a schematic diagram of an OLED display module in a flattened state after being bent, according to related technologies.

[0044] Figure 2a This is a schematic diagram of the back side of a display module in this embodiment.

[0045] Figure 2b This is a schematic diagram showing the module in its flattened state after being bent, as described in this embodiment.

[0046] Figure 2c This is a cross-sectional schematic diagram of a display module in this embodiment.

[0047] Figure 3a This is a top view schematic diagram of the structure of a first support layer in the display module of this embodiment.

[0048] Figure 3b For along Figure 3a A structural cross-sectional view of the AA' section line.

[0049] Figure 3c This is a top view schematic diagram of another type of first support layer in the module shown in this embodiment.

[0050] Figure 3d For along Figure 3c A structural cross-sectional view of the BB' section line.

[0051] Figure 3e This is a top view schematic diagram of another type of first support layer in the display module of this embodiment.

[0052] Figure 3f For along Figure 3e A structural cross-sectional view of the CC' section line.

[0053] Figure 4a For along Figure 3a , Figure 3c and Figure 3e A structural cross-sectional view of the DD' section line.

[0054] Figure 4b For along Figure 3a , Figure 3c and Figure 3e Another structural cross-sectional view of the DD' section line.

[0055] Figure 5a for Figure 3a , Figure 3c and Figure 3e An enlarged schematic diagram of part H in the middle.

[0056] Figure 5b for Figure 3a , Figure 3c and Figure 3e Another enlarged schematic diagram of part H in the middle. Detailed Implementation

[0057] To enable those skilled in the art to better understand the technical solutions of the embodiments of this disclosure, a display module and display device provided by the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0058] Embodiments of this disclosure will be described more fully below with reference to the accompanying drawings; however, the embodiments shown may be embodied in different forms and should not be construed as limited to the embodiments set forth in this disclosure. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will enable those skilled in the art to fully understand the scope of this disclosure.

[0059] This disclosure is not limited to the embodiments shown in the accompanying drawings, but includes modifications to the configuration based on the manufacturing process. Therefore, the areas illustrated in the drawings are schematic, and the shapes of the areas shown illustrate specific shapes of the areas, but are not intended to be limiting.

[0060] Currently, users are continuously increasing their requirements for the bending ability and crease resistance of foldable OLED display products.

[0061] In related technologies, foldable OLED display modules have a support layer on the back side of the display panel to protect the foldable display panel. The support layer covers the entire back side of the display panel, and its structure is designed as a stack of an adhesive layer and a support material layer. The adhesive layer is used to bond the support material layer to the display panel.

[0062] However, as the bending radius of foldable OLED display modules gradually decreases, the crease problem of existing OLED display modules is also becoming increasingly apparent. For example... Figure 1 As shown, the creases are caused by the fact that the laminated materials of the OLED display module cannot return to a completely flat state after frequent bending, resulting in unevenness on the surface of the OLED display module 8 (especially the surface of the bending area), which affects the visual effect when the user views the screen from the side.

[0063] In addition, when carbon fiber is used as the support layer on the back of the display panel, since carbon fiber is non-conductive, grounding the back surface of the display panel requires plating a metal layer or attaching a conductive material layer on the side of the support layer away from the display panel. This process is complex and costly.

[0064] To address the aforementioned problems in the related technologies, in a first aspect, embodiments of this disclosure provide a display module, such as... Figure 2a , Figure 2b and Figure 2c As shown, the display panel 1 has a display side and a back side, which are opposite to each other. The display panel 1 includes a first flattened area 100, a bending area 101, and a second flattened area 102. The bending area 101 is located between the first flattened area 100 and the second flattened area 102, and the bending area 101 is connected to the first flattened area 100 and the second flattened area 102 respectively. The display panel 1 also includes a first support layer 2 located on the back side of the display panel 1. The first support layer 2 includes two or more strip structures 20. The orthographic projection of the strip structures 20 on the display panel 1 extends from the bending area 101 to the corner of the first flattened area 100 away from the bending area 101 and the corner of the second flattened area 102 away from the bending area 101.

[0065] The bending of the bending area 101 allows the first flattening area 100 and the second flattening area 102 of the display panel 1 to be stacked, and the flattening of the bending area 101 allows the first flattening area 100 and the second flattening area 102 of the display panel 1 to be flattened on the same plane, that is, the entire display panel 1 is in a flattened state.

[0066] In this embodiment, the strip structure 20 has a rebound force that restores its original shape when it bends along with the bending area 101 of the display panel 1. By extending the orthographic projection of the strip structure 20 on the display panel 1 from the bending area 101 to the corner positions of the first flattening area 100 away from the bending area 101 and the corner positions of the second flattening area 102 away from the bending area 101, during the process of the bending area 101 of the display panel 1 changing from a bent state to a flattened state, the rebound force of the strip structure 20 will pull itself to restore its original shape in the flattened state, thereby pulling the corner positions of the display panel 1 to completely flatten the creases of the display panel 1 in the bent state, and thus enabling the display panel 1 to return from the bent state to a completely flattened state, ultimately improving the display effect of the display module.

[0067] In some embodiments, such as Figure 3a and Figure 3b As shown, the first support layer 2 includes a first strip structure 201 and a second strip structure 202. The first strip structure 201 and the second strip structure 202 intersect, and the orthographic projection of the intersection position on the display panel 1 is located in the bending area 101. The end of the first strip structure 201 is located at a pair of diagonal positions formed by one corner of the first flattening area 100 and one corner of the second flattening area 102. The end of the second strip structure 202 is located at another pair of diagonal positions formed by the other corner of the first flattening area 100 and the other corner of the second flattening area 102.

[0068] The first strip structure 201 and the second strip structure 202 have a rebound force that restores their original shape when the display panel 1 bends along the bending area 101. By positioning the end of the first strip structure 201 at one corner of the first flattened area 100 and one corner of the second flattened area 102, and the end of the second strip structure 202 at the other corner of the first flattened area 100 and the other corner of the second flattened area 102, during the process of the bending area 101 of the display panel 1 changing from a bent state to a flattened state, the rebound force of the first strip structure 201 and the second strip structure 202 will pull themselves back to their original shape in the flattened state through their ends. This will pull the diagonal position of the display panel 1 so that the crease of the display panel 1 in the bent state is completely flattened, thereby allowing the display panel 1 to return from a bent state to a completely flattened state, ultimately improving the display effect of the display module.

[0069] In some embodiments, the orthographic projection of the first strip structure 201 and the second strip structure 202 on the display panel 1 is either planar or grid-like. The grid-like first strip structure 201 and the second strip structure 202 can reduce the material cost of the first support layer 2 compared to the planar first strip structure 201 and the second strip structure 202.

[0070] In some embodiments, such as Figure 3c and Figure 3d As shown, the first strip structure 201 has a first groove A on the side opposite to the display panel 1, and the second strip structure 202 has a second groove B on the side opposite to the display panel 1. The first support layer 2 also includes a first heat dissipation structure 203 and a second heat dissipation structure 204. The first heat dissipation structure 203 is located in the first groove A, and the second heat dissipation structure 204 is located in the second groove B.

[0071] The first heat dissipation structure 203 and the second heat dissipation structure 204 can improve the thermal conductivity of the first support layer 2, thereby improving the heat dissipation capacity of the display module.

[0072] In some embodiments, such as Figure 3c and Figure 3d As shown, the surfaces of the first heat dissipation structure 203 and the first strip structure 201 facing away from the display panel 1 are flush, as are the surfaces of the second heat dissipation structure 204 and the second strip structure 202 facing away from the display panel 1. This arrangement can improve or avoid the problem of poor molding of the first support layer 2 during the process of attaching it to the back of the display panel 1 caused by unevenness of the surfaces of the first heat dissipation structure 203 and the first strip structure 201 facing away from the display panel 1, as well as the surfaces of the second heat dissipation structure 204 and the second strip structure 202 facing away from the display panel 1.

[0073] In some embodiments, such as Figure 3c and Figure 3d As shown, a first gap is spaced between the sidewalls of the first heat dissipation structure 203 and the first groove A, with the size of the first gap ranging from 0.3 to 0.6 mm; a second gap S is spaced between the sidewalls of the second heat dissipation structure 204 and the second groove B, with the size of the second gap S ranging from 0.3 to 0.6 mm. For example, the first gap is 0.5 mm and the second gap S is 0.5 mm.

[0074] The setting of the first spacing S and the second spacing can prevent unevenness on the side of the heat dissipation structure and the strip structure away from the display panel 1 caused by the misalignment of the relative positions of the objects being bonded during the bonding process of the first heat dissipation structure 203 and the second heat dissipation structure 204 when they are bonded into the groove. This avoids the problem of poor molding when the first support layer 2 is bonded to the back of the display panel 1.

[0075] In some embodiments, the materials of the first heat dissipation structure 203 and the second heat dissipation structure 204 include graphite. Graphite has excellent thermal conductivity, which can improve the thermal conductivity of the first support layer 2, thereby improving the heat dissipation capability of the display module.

[0076] It should be noted that the first heat dissipation structure 203 and the second heat dissipation structure 204 can also be made of other materials with good thermal conductivity.

[0077] In some embodiments, such as Figure 3e and Figure 3f As shown, the first strip structure 201 includes a first part C, which is located between the end of the first strip structure 201 and its intersection with the second strip structure 202; the second strip structure 202 includes a second part D, which is located between the end of the second strip structure 202 and its intersection with the first strip structure 201; the orthographic projection shape of the first part C and the second part D on the display panel 1 includes a wavy shape; the width m1 of the orthographic projection of the first part C on the display panel 1 is smaller than the width m2 of the orthographic projection of the other parts of the first strip structure 201 on the display panel 1; the width n1 of the orthographic projection of the second part D on the display panel 1 is smaller than the width n2 of the orthographic projection of the other parts of the second strip structure 202 on the display panel 1.

[0078] The wavy first part C and the second part D give the first strip structure 201 and the second strip structure 202 spring-like elastic properties. By adjusting the width and shape of the first part C and the second part D, the elastic properties of the first strip structure 201 and the second strip structure 202 can be enhanced, thereby enhancing the rebound force performance of the first strip structure 201 and the second strip structure 202, and thus optimizing the bending feel of the display module.

[0079] In some embodiments, such as Figure 4a As shown, a third groove E is provided on the side of the intersection region of the first strip structure 201 and the second strip structure 202, near or away from the display panel 1; or, as shown... Figure 4b As shown, a plurality of through holes F are provided at the intersection of the first strip structure 201 and the second strip structure 202, and the plurality of through holes F are evenly distributed in the intersection of the first strip structure 201 and the second strip structure 202.

[0080] Since the orthographic projection of the intersection area of ​​the first strip structure 201 and the second strip structure 202 on the display panel 1 is located in the bending area 101, by opening a third groove E or multiple through holes F in the intersection area of ​​the first strip structure 201 and the second strip structure 202, the corresponding bending area 101 of the display module can have good bending performance, thereby optimizing the bending feel of the display module.

[0081] In some embodiments, such as Figure 5a and Figure 5b As shown, the orthographic projection shape of the distribution area of ​​the third groove E or multiple through holes F on the display panel 1 includes a spindle shape (similar to an elliptical structure, i.e., a shape with small longitudinal dimensions at both ends and a large longitudinal dimension in the middle) or a straight line shape. This arrangement can further enable the corresponding bending area 101 of the display module to have good bending performance, thereby further optimizing the bending feel of the display module and improving the drop resistance of the display module.

[0082] In some embodiments, the materials of the first strip structure 201 and the second strip structure 202 include metallic materials; the thickness of the first strip structure 201 and the second strip structure 202 is greater than 10 μm.

[0083] Among them, metallic materials include titanium alloys, SUS (stainless steel), iron, ferroalloys, and diamond aluminum. The first strip structure 201 and the second strip structure 202 of the metallic material can improve the conductivity of the first support layer 2, which is conducive to the conduction of static electricity on the back side of the display panel 1 to the ground through the first support layer 2, thereby improving the performance of the display module and also improving the drop resistance of the display module.

[0084] In this embodiment, as Figure 3a and Figure 3b As shown, the thickness of the first support layer 2 is less than 50 μm. Because... Figure 2a and Figure 2b In this design, the thickness of the first support layer 2 is relatively small, so the third groove or multiple through holes do not need to be formed in the corresponding bending area 101 of the first support layer 2. For example... Figure 3c and Figure 3d As shown, the thickness of the first support layer 2 is greater than 100 μm, which facilitates the creation of grooves in the first strip structure 201 and the second strip structure 202 to accommodate the heat dissipation structure. Figure 3e and Figure 3f As shown, the thickness of the first support layer 2 is greater than 100μm, and this thickness setting is beneficial to improving the traction of the first part C and the second part D.

[0085] In some embodiments, such as Figures 3a-3fAs shown, the first support layer 2 further includes a first adhesive layer 205, located between the first strip structure 201 and the display panel 1 and between the second strip structure 202 and the display panel 1. The orthographic projection of the first adhesive layer 205 on the display panel 1 is located within the orthographic projection area of ​​the first strip structure 201 and the second strip structure 202 on the display panel 1. The orthographic projections of the first adhesive layer 205 and the intersection of the first strip structure 201 and the second strip structure 202 on the display panel 1 do not overlap, and the first adhesive layer 205 overlaps at least with the orthographic projections of the ends of the first strip structure 201 and the second strip structure 202 on the display panel 1.

[0086] The first adhesive layer 205 enables the first support layer 2 to be attached to the back side of the display panel 1. The orthographic projection of the intersection of the first adhesive layer 205, the first strip structure 201, and the second strip structure 202 on the display panel 1 does not overlap, which ensures that the bending area 101 of the display module has good bending performance, thereby improving the bending feel of the display module.

[0087] In some embodiments, the thickness of the first adhesive layer 205 ranges from 20 to 30 μm; the tack of the first adhesive layer 205 is >2000 gf / inch. For example, the thickness of the first adhesive layer 205 is 25 μm. The first adhesive layer 205 can be any adhesive material with this tack property, such as transparent optical adhesive. The first adhesive layer 205 also has a certain cushioning property, which can improve the drop resistance of the display module.

[0088] In some embodiments, such as Figure 3c and Figure 3d As shown, the first support layer 2 also includes a second adhesive layer 206, located between the first groove A and the first heat dissipation structure 203 and between the second groove B and the second heat dissipation structure 204. The orthographic projection of the second adhesive layer 206 on the display panel 1 is located within the orthographic projection area of ​​the first heat dissipation structure 203 and the second heat dissipation structure 204 on the display panel 1. The orthographic projection of the second adhesive layer 206 on the display panel 1 does not overlap with the intersection of the first strip structure 201 and the second strip structure 202. The second adhesive layer 206 overlaps at least with the orthographic projection of the ends of the first heat dissipation structure 203 and the second heat dissipation structure 204 on the display panel 1.

[0089] The second adhesive layer 206 enables bonding between the strip structure and the heat dissipation structure. The intersection of the second adhesive layer 206 with the first strip structure 201 and the second strip structure 202 does not overlap in its orthographic projection on the display panel 1, ensuring good bending performance of the bending area 101 of the display module and thus improving the bending feel of the display module.

[0090] In some embodiments, the second adhesive layer 206 may be any adhesive material with such adhesive properties, such as transparent optical adhesive.

[0091] In some embodiments, such as Figure 2a and Figure 2c As shown, the display module also includes a second support layer 3, located between the display panel 1 and the first support layer 2, and the second support layer 3 covers the back side of the display panel 1. The bending area 101 includes a first sub-area 101a, a second sub-area 101b, and a third sub-area 101c. The second sub-area 101b is located between the first sub-area 101a and the third sub-area 101c and the three are connected in sequence. The first sub-area 101a is connected to the first flattening area 100, and the third sub-area 101c is connected to the second flattening area 102. The thickness of the area of ​​the second support layer 3 that overlaps with the first sub-area 101a and the third sub-area 101c is less than the thickness of other areas of the second support layer 3. Multiple holes are opened in the area of ​​the second support layer 3 that overlaps with the second sub-area 101b, and the multiple holes are evenly distributed.

[0092] The multiple holes are evenly distributed, arranged in an array, with equal spacing between any two adjacent holes along the row and column directions. The second support layer 3 provides support for the entire back side of the display panel 1. The thickness of the second support layer 3 corresponding to the first sub-region 101a and the third sub-region 101c, and the arrangement of the multiple holes corresponding to the second sub-region 101b, ensure that the bending area 101 of the display module has good bending performance, thereby improving the bending feel of the display module.

[0093] In some embodiments, the second support layer 3 is made of materials such as titanium alloy, SUS (stainless steel), iron, iron alloy or carbon fiber.

[0094] In some embodiments, the second support layer 3 is bonded to the first support layer 2 via the first adhesive layer 205. In some embodiments, the second support layer 3 and the first support layer 2 may also be bonded together at the supplier, and after the materials arrive, the integrated structure is bonded to the back side of the display panel 1.

[0095] In some embodiments, such as Figure 2c As shown, the display module also includes a back film 4, a polarizer 5, an optical adhesive layer 6, and a cover plate 7. The back film 4 is located between the display panel 1 and the second support layer 3, and is used to dissipate heat and protect the back side of the display panel 1. The polarizer 5 is located on the display side of the display panel 1 and is used to improve or avoid the reflection of ambient light by the display panel 1. The optical adhesive layer 6 is used to attach the cover plate 7 to the display side of the display panel 1. The cover plate 7 can form a protective cover on the display side of the display panel 1.

[0096] The display module provided in this embodiment has a strip structure that has a rebound force to restore its original shape when it bends along the bending area of ​​the display panel. By extending the orthographic projection of the strip structure on the display panel from the bending area to the corners of the first and second flattened areas away from the bending area, the rebound force of the strip structure will pull itself back to its original shape in the flattened state during the process of the bending area of ​​the display panel changing from a bent state to a flattened state. This will pull the corners of the display panel to completely flatten the creases in the bent state, thereby allowing the display panel to return from a bent state to a completely flattened state, ultimately improving the display effect of the display module.

[0097] Secondly, embodiments of this disclosure also provide a display device, including the display module in the above embodiments.

[0098] By using the display module in the above embodiments, the creases from bending can be completely flattened during the bending and unfolding process of the display device, thereby improving the display effect of the display device.

[0099] The display device provided in this disclosure can be any product or component with display function, such as an OLED panel, OLED TV, OLED billboard, monitor, mobile phone, or navigator.

[0100] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A display module, comprising a display panel having a display side and a back side, the display side and the back side being opposite to each other, the display panel including a first flattening area, a bending area and a second flattening area, the bending area being located between the first flattening area and the second flattening area, and the bending area being respectively connected to the first flattening area and the second flattening area; Its features are, It also includes a first support layer located on the back side of the display panel. The first support layer includes two or more strip structures, the orthographic projection of the strip structure on the display panel extending from the bending area to the corner position of the first flattened area away from the bending area and the corner position of the second flattened area away from the bending area; The first support layer includes a first strip structure and a second strip structure. The first strip structure and the second strip structure intersect, and the orthographic projection of the intersection position on the display panel is located in the bending area. The end of the first strip structure is located at a diagonal position formed by one corner of the first flattened area and one corner of the second flattened area. The end of the second strip structure is located at another diagonal position formed by the other corner of the first flattened area and the other corner of the second flattened area.

2. The display module according to claim 1, characterized in that, The first strip structure has a first groove on the side facing away from the display panel, and the second strip structure has a second groove on the side facing away from the display panel. The first support layer further includes a first heat dissipation structure and a second heat dissipation structure, wherein the first heat dissipation structure is located in the first groove and the second heat dissipation structure is located in the second groove.

3. The display module according to claim 2, characterized in that, The surfaces of the first heat dissipation structure and the first strip structure opposite to the display panel are flush. The second heat dissipation structure and the second strip structure are flush with the side surface opposite to the display panel.

4. The display module according to claim 3, characterized in that, A first gap is spaced between the first heat dissipation structure and the sidewall of the first groove, and the size of the first gap ranges from 0.3 to 0.6 mm. A second gap is spaced between the second heat dissipation structure and the sidewall of the second groove, the size of which ranges from 0.3 to 0.6 mm.

5. The display module according to claim 2, characterized in that, The materials of the first heat dissipation structure and the second heat dissipation structure include graphite.

6. The display module according to claim 1, characterized in that, The first strip structure includes a first part, which is located between the end of the first strip structure and its intersection with the second strip structure; The second strip structure includes a second part located between the end of the second strip structure and its intersection with the first strip structure; The orthographic projection shapes of the first and second parts on the display panel include a wavy shape; The width of the orthographic projection of the first part on the display panel is smaller than the width of the orthographic projection of the other parts of the first strip structure on the display panel; The width of the orthographic projection of the second part on the display panel is smaller than the width of the orthographic projection of the other parts of the second strip structure on the display panel.

7. The display module according to any one of claims 1-6, characterized in that, A third groove is provided on the side of the intersection area of ​​the first strip structure and the second strip structure that is close to or far from the display panel; Alternatively, multiple through holes may be provided at the intersection of the first strip structure and the second strip structure, and the multiple through holes may be evenly distributed at the intersection of the first strip structure and the second strip structure.

8. The display module according to claim 7, characterized in that, The orthographic projection shape of the distribution area of ​​the third groove or the plurality of through holes on the display panel includes a spindle shape or a straight line shape.

9. The display module according to claim 1, characterized in that, The materials of the first strip structure and the second strip structure include metallic materials; The thickness of the first strip structure and the second strip structure is greater than 10 μm.

10. The display module according to claim 1, characterized in that, The first support layer further includes a first adhesive layer located between the first strip structure and the display panel, and between the second strip structure and the display panel. The orthographic projection of the first adhesive layer on the display panel lies within the orthographic projection areas of the first strip structure and the second strip structure on the display panel. The first adhesive layer does not overlap with the orthographic projection of the intersection of the first strip structure and the second strip structure on the display panel, and the first adhesive layer overlaps at least with the orthographic projection of the ends of the first strip structure and the second strip structure on the display panel.

11. The display module according to claim 10, characterized in that, The thickness of the first adhesive layer ranges from 20 to 30 μm; The adhesive strength of the first adhesive layer is >2000gf / inch.

12. The display module according to claim 2, characterized in that, The first support layer further includes a second adhesive layer located between the first groove and the first heat dissipation structure, and between the second groove and the second heat dissipation structure. The orthographic projection of the second adhesive layer on the display panel lies within the orthographic projection area of ​​the first heat dissipation structure and the second heat dissipation structure on the display panel. The second adhesive layer does not overlap with the orthographic projection of the intersection of the first strip structure and the second strip structure on the display panel, and the second adhesive layer overlaps at least with the orthographic projection of the ends of the first heat dissipation structure and the second heat dissipation structure on the display panel.

13. The display module according to claim 1, characterized in that, It also includes a second support layer located between the display panel and the first support layer, and the second support layer covers the back side of the display panel. The bending area includes a first sub-area, a second sub-area, and a third sub-area. The second sub-area is located between the first sub-area and the third sub-area, and the three are connected sequentially. The first sub-area is connected to the first flattening area, and the third sub-area is connected to the second flattening area. The thickness of the region of the second support layer that overlaps with the first sub-region and the third sub-region is less than the thickness of other regions of the second support layer. Multiple holes are formed in the area where the second support layer overlaps with the second sub-region, and the multiple holes are evenly distributed.

14. A display device, characterized in that, Includes the display module as described in any one of claims 1-13.

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