Display device

Abstract

The utility model discloses a display device which comprises a display panel and a heat dissipation film located on the back face of the display panel. The display panel comprises a plane area and a curved surface area located on the edge of the plane area, and at least part of the heat dissipation film is attached to the curved surface area. The heat dissipation film comprises an adhesion layer, a buffer layer and a metal layer which are sequentially laminated, and the adhesion layer is located between the display panel and the buffer layer; the metal layer is provided with a first die cutting structure at the curved surface area, and the first die cutting structure extends along the edge of the display panel. Thus, the first die cutting structure extending along the edge of the display panel is arranged in the heat dissipation film attached to the curved surface area, and the first die cutting structure is located in the metal layer with poor bending deformation capacity, so that the stress in the heat dissipation film at the curved surface is released, the deformation capacity of the heat dissipation film during bending is improved, the virtual attachment phenomenon at the curved surface is reduced, and the heat dissipation efficiency is improved. The attaching effect of the heat dissipation film is improved, and then the reliability of the display device is improved.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and more particularly to a display device. Background Technology

[0002] In display devices, a heat dissipation film is typically attached to the back of the display panel to prevent excessive heat buildup and improve the device's reliability. However, when the display panel is curved, the heat dissipation film will be compressed and deformed when attached to the curved surface, resulting in a poorer adhesion.

[0003] Therefore, how to improve the adhesion effect of the heat dissipation film has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0004] This utility model provides a display device for improving the adhesion effect of the heat dissipation film.

[0005] This utility model embodiment provides a display device, including: a display panel, and a heat dissipation film located on the back of the display panel;

[0006] The display panel includes: a planar area and a curved area located at the edge of the planar area, and at least a portion of the heat dissipation film is attached to the curved area;

[0007] The heat dissipation film includes: an adhesive layer, a buffer layer and a metal layer stacked in sequence, wherein the adhesive layer is located between the display panel and the buffer layer;

[0008] The metal layer has a first die-cutting structure at the location of the curved area, and the first die-cutting structure extends along the edge of the display panel.

[0009] The beneficial effects of this utility model are as follows:

[0010] This utility model provides a display device, including: a display panel and a heat dissipation film located on the back of the display panel; the display panel includes: a planar area and a curved area located at the edge of the planar area, with at least a portion of the heat dissipation film attached to the curved area; the heat dissipation film includes: an adhesive layer, a buffer layer, and a metal layer stacked sequentially, with the adhesive layer located between the display panel and the buffer layer; the metal layer has a first die-cutting structure at the curved area, extending along the edge of the display panel. Thus, by providing a first die-cutting structure extending along the edge of the display panel in the heat dissipation film attached to the curved area, and with the first die-cutting structure located within the metal layer (which has poor bending deformation capability), the stress within the heat dissipation film at the curved area is released, improving the deformation capability of the heat dissipation film during bending, thereby reducing the occurrence of incomplete adhesion at the curved area, improving the adhesion effect of the heat dissipation film, and ultimately improving the reliability of the display device. Attached Figure Description

[0011] Figure 1 This is a cross-sectional view of a display device provided in an embodiment of the present utility model;

[0012] Figure 2 This is a top view of a display device provided in an embodiment of the present utility model;

[0013] Figure 3 This is a top view of another display device provided in an embodiment of the present utility model;

[0014] Figure 4 This is a partial schematic diagram of a display device provided in an embodiment of the present utility model;

[0015] Figure 5 This is a partial cross-sectional view of the first die-cutting structure provided in the embodiment of this utility model;

[0016] Figure 6 This is a partial cross-sectional view of the air guide groove provided in this embodiment of the present invention, with the cross-sectional surface parallel to the air guide groove.

[0017] Figure 7 This is a partial cross-sectional view of the air guide groove provided in this embodiment of the present invention, with the cross-section perpendicular to the air guide groove.

[0018] Figure 8 This is a partial cross-sectional view of the second die-cutting structure provided in the embodiment of this utility model;

[0019] Figure 9 This is a curvature simulation diagram of the corner area provided in the embodiment of this utility model. Detailed Implementation

[0020] The specific embodiments of a display device provided by this utility model will now be described in detail with reference to the accompanying drawings. It should be noted that the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0021] This utility model embodiment provides a display device, such as... Figure 1 As shown, Figure 1 A cross-sectional view of a display device, including: a display panel 100, and a heat dissipation film 200 located on the back of the display panel 100;

[0022] The display panel 100 includes: a flat area Q1 and a curved area Q2 located at the edge of the flat area Q1, and at least a portion of the heat dissipation film 200 is attached to the curved area Q2;

[0023] The heat dissipation film 200 includes: an adhesive layer 201, a buffer layer 202 and a metal layer 203 stacked in sequence, wherein the adhesive layer 201 is located between the display panel 100 and the buffer layer 202;

[0024] The metal layer 203 has a first die-cutting structure L1 at the curved area Q2 position, and the first die-cutting structure L1 extends along the edge of the display panel 100.

[0025] Thus, by setting a first die-cut structure extending along the edge of the display panel in the heat dissipation film attached to the curved area, and the first die-cut structure being located within a metal layer with poor bending deformation capability, the stress in the heat dissipation film at the curved area is released, the deformation capability of the heat dissipation film when bent is improved, thereby reducing the phenomenon of incomplete adhesion at the curved area, improving the adhesion effect of the heat dissipation film, and thus improving the reliability of the display device.

[0026] The adhesive layer 201 includes, but is not limited to, mesh adhesive or other adhesive materials; the buffer layer 202 includes, but is not limited to, silicone or foam and other buffer materials; and the metal layer 203 includes, but is not limited to, copper, aluminum alloy or other materials with good thermal conductivity. The back surface of the display panel 100 can be understood as the surface of the display panel 100 that faces away from the light-emitting surface. Figure 1 As shown, to improve heat dissipation, a heat dissipation film 200 is applied to the entire back of the display panel 100. Of course, depending on actual needs, the heat dissipation film 200 can also be applied only to certain areas; no specific limitation is made here. Additionally, as... Figure 2 As shown, Figure 2 To display a top view of the device, Figure 2 The diagram shows a display device with curved surfaces on both sides of the display panel 100. Therefore, the curved area Q2 is located on both sides of the flat area Q1. The first die-cut structure L1 is located in the metal layer corresponding to the curved areas Q2 on both sides, or, as shown... Figure 3 As shown, Figure 3 This is a top view of a display device where the display panel 100 is curved on all four sides. At this time, the curved area surrounds the flat area. The curved area includes a corner area Q21 and a straight area Q22. The first die-cut structure L1 can be distributed in the corresponding metal layer around the flat area.

[0027] It should be understood that the metal layer cannot be seen in the top view of the display device, and therefore the die-cut structure (including the first die-cut structure and the second die-cut structure) cannot be seen either. Therefore, the die-cut structure is represented by dashed lines in the top view.

[0028] The following sections describe the setup methods for the die-cut structures in the metal layers corresponding to the straight and corner areas in the curved surface region.

[0029] I. Straight Line Area.

[0030] Optionally, the first die-cut structure is located only in the metal layer corresponding to the straight section. In this way, the first die-cut structure can extend along a straight direction in the straight section, avoiding bending of the first die-cut structure in the curved section, reducing the difficulty of setting the first die-cut structure, and thus reducing the manufacturing cost of the display device.

[0031] Furthermore, during the fabrication of the die-cut structures, if there are intersections between the die-cut structures, the metal layer at the intersections will undergo repeated die-cutting. This will cause the metal layer at the intersections to be subjected to repeated pressure from the die-cutting tools, resulting in deformation of the metal layer. Therefore, placing the first die-cut structure only in the metal layer corresponding to the straight section can prevent the first die-cut structure from intersecting with the second die-cut structure in the corner section, thereby avoiding deformation of the metal layer and improving the reliability of the heat dissipation film.

[0032] Of course, a first die-cut structure extending along the edge of the display panel can also be set in the corner area of ​​the metal layer, thereby further improving the adhesion effect of the heat dissipation film in the corner area and thus improving the reliability of the display device.

[0033] Optionally, such as Figure 4 As shown, Figure 4 for Figure 3 A magnified view of the area shown in Q3, and Figure 4 In a view from one side of the metal layer 203 of the display device, a plurality of first die-cut structures L1 are provided in the metal layer corresponding to at least one straight area, and the spacing a between adjacent first die-cut structures L1 is greater than or equal to 0.5 mm.

[0034] The number of first die-cut structures L1 set in the metal layer corresponding to a straight area Q22 includes, but is not limited to, 2, 3, 4, 5 or more, which can be set according to actual needs and is not limited here. In addition, during the die-cutting process, if two adjacent die-cut structures are too close together, the metal layer between the adjacent die-cut structures will be greatly deformed due to extrusion. Therefore, the spacing between adjacent first die-cut structures should not be too small.

[0035] Thus, by setting multiple first die-cut structures within a straight area, the stress within the heat dissipation film at curved surfaces is further released, improving the film's deformation capacity during bending and reducing the occurrence of incomplete adhesion at curved surfaces. This enhances the adhesion effect of the heat dissipation film and consequently improves the reliability of the display device. Furthermore, by controlling the spacing between adjacent first die-cut structures, deformation of the metal layer due to compression during die-cutting can be avoided if the spacing is too small, maintaining the shape of the metal layer and improving the reliability of the heat dissipation film, thereby enhancing the reliability of the display device.

[0036] Optionally, such as Figure 1 As shown, the metal layer 203 and the buffer layer 202 surround and form a cavity K at the first die-cut structure L1, as... Figure 3 As shown, the heat dissipation film corresponding to the straight section Q22 has air guide grooves C, such as... Figure 4 As shown, the air guide groove C is used to connect the cavity ( Figure 4 (Not shown in the diagram) and the outside. It should be understood that it is difficult to describe the structural relationship between the air guide groove C and the cavity K with a single diagram. Therefore, three diagrams are used here for comprehensive description. The air guide groove C only needs to be able to connect the cavity K with the outside. For example, the air guide groove C can be a groove. The air guide groove C can take the form known to those skilled in the art and is not limited here. The number of air guide grooves C in a first die-cutting structure L1 can be, but is not limited to: 1, 2, 3, 4 or more. The position of the air guide grooves C can be, but is not limited to: located at both ends, the middle or other positions of the first die-cutting structure L1. The specific number and position can be selected according to the length of the first die-cutting structure L1 and is not limited here.

[0037] In this way, by setting up air guide channels, the gas in the cavity can be smoothly discharged to the outside when the display device temperature is high, avoiding the bulging of the metal layer caused by trapped air in the cavity, improving the reliability of the heat dissipation film, and thus improving the reliability of the display device.

[0038] Additionally, to more clearly illustrate the multiple first die-cut structures and air guide channels, when the air guide channels are not provided, such as Figure 5 As shown, Figure 5 This is a partial cross-sectional view of the area near the first die-cutting structure L1, with the cutting plane perpendicular to the first die-cutting structure L1. When an air guide groove is provided, as shown... Figure 6 and Figure 7 As shown, Figure 6 This is a partial cross-sectional view of the air guide groove C, where the cut surface is perpendicular to the first die-cut structure L1 and parallel to the air guide groove C. Figure 6 The display panel and adhesive layer are not shown. Figure 7 This is a partial cross-sectional view of the area near the air guide groove C, with the cut surface parallel to the first die-cut structure L1 and perpendicular to the air guide groove C. For example, Figure 6 and Figure 7 As shown, the depth of the air guide groove C can be less than the depth of the first die-cut structure L1 (e.g., Figure 6 (e.g., a central air guide groove), thereby reducing damage to the metal layer 203 caused by the air guide groove C, or the depth of the air guide groove C is greater than or equal to the depth of the first die-cut structure L1 (e.g., a central air guide groove). Figure 7 (Middle air guide groove) to improve the exhaust effect of air guide groove C. For example... Figure 6 As shown, the depth of each first die-cutting structure L1 in the same display device can be the same to reduce the complexity of setting the first die-cutting structure L1, or they can be different to improve the flexibility of setting the first die-cutting structure L1. No specific limitation is made here.

[0039] II. Corner area.

[0040] Optionally, such as Figure 3 As shown, the curved area (not shown for clarity in the figure) includes a corner area Q21 and a straight area Q22. The first die-cutting structure L1 is at least partially located in the metal layer at the position of the straight area Q22. The metal layer is provided with a second die-cutting structure L2 at the position of the corner area Q21. The second die-cutting structure L2 extends from the interior of the metal layer to the edge of the metal layer.

[0041] Thus, by setting a second die-cutting structure, the stress within the heat dissipation film at the corner area is released, improving the deformation capability of the heat dissipation film during bending. This reduces wrinkles at the corner area, improves the adhesion of the heat dissipation film, and consequently enhances the reliability of the display device. Furthermore, the second die-cutting structure extends from the interior of the metal layer to its edge, making it linear and reducing the manufacturing difficulty of the second die-cutting structure.

[0042] in addition, Figure 2 and Figure 3 The display panels in the shown devices are all rectangular, with curved surfaces on both sides (e.g., ...). Figure 2 As shown), the display panel has two curved areas, located on either side of the flat area, with curved surfaces surrounding the entire display panel (e.g., ...). Figure 3 As shown, the curved area surrounds the flat area, and the curved area includes four corner areas and four straight areas. Of course, the display panel in the display device is not limited to a rectangle. For example, the display panel can be circular, with a ring-shaped curved area around it. In this case, the curved area includes the corner areas but not the straight areas. The distribution of the curved area needs to be determined according to the shape of the display panel, and no specific limitation is made here.

[0043] Optionally, such as Figure 3 As shown, at least one corner area Q21 has multiple second die-cutting structures L2 in its metal layer, and each second die-cutting structure L2 extends radially towards the edge of the metal layer. The number of second die-cutting structures L2 in the metal layer corresponding to a corner area Q21 includes, but is not limited to, 2, 3, 4, 5 or more, and can be set according to actual needs, which is not limited here.

[0044] Thus, by setting multiple second die-cut structures within a corner area, the stress within the heat dissipation film at the corner is further released, improving the film's deformation capacity during bending. This further reduces wrinkles at the corner, improves the film's adhesion, and consequently enhances the reliability of the display device. Furthermore, the radial arrangement of the second die-cut structures avoids cross-cutting that could cause deformation of the metal layer, further improving the reliability of the heat dissipation film.

[0045] Furthermore, each of the second die-cut structures is independent of the others. In this way, by making each of the second die-cut structures independent of the others, the deformation of the metal layer is avoided, the shape of the metal layer is maintained, and thus the reliability of the heat dissipation film is improved.

[0046] In addition, similar to the first die-cutting structure, the depth of each second die-cutting structure in the same display device can be the same to reduce the complexity of setting the second die-cutting structure, or they can be different to improve the flexibility of setting the second die-cutting structure. No specific limitation is made here.

[0047] Optionally, such as Figure 4 As shown, the included angle θ between adjacent second die-cut structures L2 is greater than or equal to 10° and less than or equal to 30°.

[0048] Thus, by limiting the included angle between adjacent second die-cut structures, it is possible to avoid having too few second die-cut structures due to an excessively large included angle, thereby improving the stress release effect of the second die-cut structure on the corner area, thus improving the adhesion effect of the heat dissipation film and improving the reliability of the display device. It is also possible to avoid having too small an included angle, which would result in too small a spacing between adjacent second die-cut structures, causing the metal layer to deform due to extrusion during the die-cutting process. This maintains the shape of the metal layer, improves the reliability of the heat dissipation film, and thus improves the reliability of the display device.

[0049] Optionally, such as Figure 4 As shown, in the metal layer corresponding to a corner area, the extension directions of each second die-cut structure L2 intersect at a point. The first endpoint of each second die-cut structure L2 is located on a circle with the intersection point as the center. The diameter D of the circle is greater than or equal to 5 mm. The first endpoint is the endpoint of the second die-cut structure L2 on the side away from the edge of the metal layer 203.

[0050] This improves the uniformity of the distribution of each second die-cut structure, thereby enhancing the stress relief effect of the second die-cut structure on the corner area, improving the adhesion effect of the heat dissipation film, and improving the reliability of the display device. In addition, the closest position between adjacent second die-cut structures is located at the first end point. The metal layer at the first end point is prone to deformation during the die-cutting process. Therefore, by limiting the diameter of the circle, the distance between the first ends of each second die-cut structure is limited, which can prevent the metal layer at the first end point from being deformed due to extrusion during the die-cutting process, maintain the shape of the metal layer, improve the reliability of the heat dissipation film, and thus improve the reliability of the display device.

[0051] Furthermore, in the metal layer corresponding to a corner area, the included angles of adjacent second die-cut structures are equal. This further improves the uniformity of the distribution of each second die-cut structure, thereby enhancing the stress relief effect of the second die-cut structure in the corner area, improving the adhesion of the heat dissipation film, and increasing the reliability of the display device.

[0052] Optionally, such as Figure 4 and Figure 8 As shown, Figure 8 This is a partial cross-sectional view of the second die-cutting structure L2, with the cutting plane parallel to the second die-cutting structure L2, which extends to the edge of the metal layer 203. Similar to the first die-cutting structure L1, a cavity is also formed between the metal layer 203 and the buffer layer 202 at the second die-cutting structure L2.

[0053] In this way, by extending the second die-cut structure to the edge of the metal layer, the cavity at the second die-cut structure can be directly connected to the outside. When the temperature of the display device is high, the gas in the cavity can be smoothly discharged to the outside, avoiding the bulging of the metal layer caused by trapped gas in the cavity, improving the reliability of the heat dissipation film, and thus improving the reliability of the display device.

[0054] In addition, when the second die-cutting structure extends to the edge of the metal layer and the first die-cutting structure intersects with the second die-cutting structure, the second die-cutting structure can serve as a venting channel for the first die-cutting structure. In this case, no additional venting channel needs to be provided, which simplifies the structure of the heat dissipation film and reduces the cost of the display device.

[0055] Optionally, when the display panel includes multiple straight lines, the first die-cutting structure can be provided only in some of the straight lines; when the display panel includes multiple corner areas, the second die-cutting structure can be provided only in some of the corner areas. This reduces the number of die-cutting structures (including the first and second die-cutting structures), thereby reducing the difficulty of manufacturing the heat dissipation film and lowering the manufacturing cost of the display device.

[0056] Optionally, a first die-cutting structure or a second die-cutting structure can have multiple segments, with intervals between each segment. This increases the number of ways to set up the die-cutting structure and improves the flexibility of the heat dissipation film setup.

[0057] Optionally, the die-cutting structure can be, but is not limited to, a semi-tangent or a groove. When the die-cutting structure is a semi-tangent, only the metal layer is cut, without removing any material, thus preserving the integrity of the metal layer to a greater extent. When the die-cutting structure is a groove, some material is removed from the metal layer, resulting in greater deformability of the metal layer. Therefore, by setting the die-cutting structure as a semi-tangent or a groove, the integrity of the metal layer is maintained, preventing partial detachment due to the die-cutting structure and improving the reliability of the heat dissipation film.

[0058] Optionally, the first and second die-cut structures are located on the side of the metal layer facing the cover plate. In this way, the first and second die-cut structures are not visible from the metal layer side of the heat dissipation film, making the heat dissipation film more aesthetically pleasing and preventing damage to the metal layer from the first or second die-cut structure, thus improving the reliability of the heat dissipation film.

[0059] Optionally, the depth of the first and second die-cut structures is less than the thickness of the metal layer, but greater than or equal to two-thirds of the thickness of the metal layer. This avoids the first and second die-cut structures penetrating the entire metal layer, which could compromise the structural integrity of the metal layer, making the heat dissipation film structure more stable and improving the reliability of the display device. It also prevents the first and second die-cut structures from being too shallow, effectively releasing stress within the heat dissipation film at curved surfaces, improving the deformation capacity of the heat dissipation film during bending, thereby reducing incomplete adhesion and wrinkles at curved surfaces, improving the adhesion effect of the heat dissipation film, and ultimately enhancing the reliability of the display device.

[0060] It should be understood that when attaching a heat dissipation film to a display panel, areas with greater curvature will experience greater stress. Therefore, the first and second die-cutting structures can be positioned at areas with greater curvature, for example, as shown in the image. Figure 9 As shown, Figure 9 A curvature simulation diagram at the corner location, from Figure 9 As can be seen in the image, the curvature of the area near the corner (shown by the dashed box A1) is relatively large. Therefore, the second die-cutting structure can be placed in the middle of the corner area, and multiple second die-cutting structures can be added from the middle outwards to both sides, thereby releasing the stress in the area with large curvature. Of course, the first die-cutting structure can also be arranged in a similar manner to the second die-cutting structure to further release the stress in the metal layer. Thus, by placing the first and second die-cutting structures in areas with large curvature, the stress in the metal layer can be released to a greater extent, improving the deformation capacity of the heat dissipation film when bent, thereby reducing the occurrence of incomplete adhesion and wrinkles on curved surfaces, improving the adhesion effect of the heat dissipation film, and ultimately improving the reliability of the display device.

[0061] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A display device, characterized in that, include: The display panel, and the heat dissipation film located on the back of the display panel; The display panel includes: a planar area and a curved area located at the edge of the planar area, and at least a portion of the heat dissipation film is attached to the curved area; The heat dissipation film includes: an adhesive layer, a buffer layer and a metal layer stacked in sequence, wherein the adhesive layer is located between the display panel and the buffer layer; The metal layer has a first die-cutting structure at the location of the curved area, and the first die-cutting structure extends along the edge of the display panel.

2. The display device of claim 1, wherein, The curved area includes a corner area and a straight area, and the first die-cut structure is at least partially located in the metal layer at the location of the straight area; The metal layer has a second die-cutting structure at the corner area, and the second die-cutting structure extends from the interior of the metal layer to the edge of the metal layer.

3. The display device of claim 2, wherein, At least one of the corner areas has multiple second die-cut structures in the metal layer, and each second die-cut structure extends radially toward the edge of the metal layer.

4. The display device of claim 3, wherein, Each of the second die-cut structures is independent of the others.

5. The display device of claim 2, wherein, The second die-cut structure extends to the edge of the metal layer.

6. The display device of claim 2, wherein, The first die-cut structure is located only in the metal layer corresponding to the straight line area.

7. The display device of claim 6, wherein, At least one of the linear regions has multiple first die-cut structures in the metal layer, and the spacing between adjacent first die-cut structures is greater than or equal to 0.5 mm.

8. The display device of claim 6, wherein, The metal layer and the buffer layer surround each other at the first die-cut structure to form a cavity. An air guide groove is provided in the heat dissipation film corresponding to the straight area. The air guide groove is used to connect the cavity with the outside.

9. A display device as claimed in any one of claims 2-8, characterized in that The first die-cutting structure and the second die-cutting structure are located on the side of the metal layer facing the cover plate.

10. A display device as claimed in any one of claims 2-8, characterized in that The depths of the first die-cutting structure and the second die-cutting structure are less than the thickness of the metal layer, and greater than or equal to two-thirds of the thickness of the metal layer.

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