Display device and manufacturing method thereof

Abstract

The invention provides a display device and a manufacturing method thereof.The display device comprises a display panel and a cover plate which are arranged in a stacked mode, the display panel comprises a first plane area, a second plane area and a bending area connecting the first plane area and the second plane area, the first plane area is arranged close to the cover plate, and the second plane area is arranged close to the cover plate. A heat dissipation film is arranged on the side, close to the second plane area, of the first plane area, and a dispensing structure is arranged on the inner side of the bending area. A first limiting structure is arranged on the side, close to the second plane area, of the first plane area and / or the side, close to the first plane area, of the second plane area, and the first limiting structure is located between the heat dissipation film and the adhesive dispensing structure and used for limiting the adhesive dispensing structure to overflow and flow towards the heat dissipation film. According to the display device and the manufacturing method thereof, the structure is simple, manufacturing is convenient, the overall structural strength can be effectively improved, and reliability is high.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display device and a method for manufacturing the same. Background Technology

[0002] With the advent of smartphones, tablets and other electronic products, people have higher and higher requirements for the user experience and comfort of electronic products. In recent years, the application of foldable products has become more and more common. The performance of foldable products has always been a focus of attention. The overall structural strength of existing foldable display devices needs to be improved, and sometimes poor reliability issues occur. Therefore, there is an urgent need for a display device with higher structural strength. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a display device and a method for manufacturing the same.

[0004] A first aspect of this application provides a display device, including a display panel and a cover plate stacked together. The display panel includes a first planar region, a second planar region, and a bent region connecting the first planar region and the second planar region. The first planar region is disposed near the cover plate. A heat dissipation film is provided on the side of the first planar region near the second planar region. An adhesive dispensing structure is provided on the inner side of the bent region. A first limiting structure is provided on the side of the first planar region near the second planar region and / or on the side of the second planar region near the first planar region. The first limiting structure is located between the heat dissipation film and the adhesive dispensing structure and is used to restrict the flow of adhesive from the adhesive dispensing structure to the heat dissipation film.

[0005] In some embodiments, the first limiting structure is a strip-shaped protrusion that extends along the length of the dispensing structure.

[0006] In some embodiments, the first limiting structure is a strip-shaped groove, which extends along the length of the dispensing structure.

[0007] In some embodiments, the first limiting structure is a block-shaped groove, which is located at the edge of the first planar area or the second planar area. The number of block-shaped grooves located on one side of the dispensing structure is multiple, and the multiple block-shaped grooves are spaced apart along the length direction of the dispensing structure.

[0008] In some embodiments, the blocky groove has a transition structure formed near the edge of the dispensing structure.

[0009] In some embodiments, a back film is provided on the side of the first planar region near the second planar region and on the side of the second planar region near the first planar region. The first limiting structure is a groove structure formed on the back film, and the depth of the groove structure is less than or equal to half the thickness of the back film.

[0010] In some embodiments, the display panel is provided with a second limiting structure located on opposite sides of the dispensing structure along its length direction, for limiting the flow of adhesive overflow from the dispensing structure along the length direction.

[0011] In some embodiments, the second limiting structure is a strip-shaped protrusion disposed on the inner side of the bending area, the strip-shaped protrusion extending along the width direction of the dispensing structure and spaced apart from the first limiting structure.

[0012] In some embodiments, the second limiting structure is a strip-shaped groove disposed in the first planar area or the second planar area, the strip-shaped groove extending along the width direction of the dispensing structure and connected to the first limiting structure.

[0013] In some embodiments, the dispensing structure is provided with the first limiting structure on both sides along the width direction, and the two ends of the first limiting structure are connected to the second limiting structure, and two adjacent second limiting structures are spaced apart along the width direction.

[0014] In some embodiments, a flexible circuit board is provided on the side of the heat dissipation film away from the first planar area, the flexible circuit board is connected to the second planar area, components are provided on the side of the flexible circuit board away from the first planar area, a driver chip is provided on the side of the second planar area away from the first planar area, a spacer layer is provided between the heat dissipation film and the second planar area; a stacked polarizing layer and an optical adhesive layer are provided between the first planar area and the cover plate, the polarizing layer is disposed close to the first planar area, and a protective adhesive layer is provided on the outer side of the bending area.

[0015] A second aspect of this application provides a method for manufacturing a display device, comprising forming a cover plate on a first surface of a first planar region of a display panel, forming a heat dissipation film on a second surface of the first planar region, forming a first limiting structure on the second surface of the first planar region and / or the second surface of the second planar region of the display panel, and forming a dispensing structure on the second surface of a bending region of the display panel.

[0016] As can be seen from the above description, this application provides a display device and its manufacturing method. The display device includes a display panel and a cover plate stacked together. The display panel includes a first planar area, a second planar area, and a bending area connecting the first and second planar areas. The first planar area is located near the cover plate. A heat dissipation film is provided on the side of the first planar area near the second planar area. A dispensing structure is provided on the inner side of the bending area. A first limiting structure is provided on the side of the first planar area near the second planar area and / or the side of the second planar area near the first planar area. The first limiting structure is located between the heat dissipation film and the dispensing structure to restrict the flow of adhesive from the dispensing structure to the heat dissipation film. By setting the first limiting structure to restrict the position of the dispensing structure, adhesive overflow onto the heat dissipation film, etc., is avoided during bending. This does not affect the assembly of the module and the whole device, ensures the support strength of the bending area, and can effectively improve the overall structural strength of the display device. This display device and its manufacturing method have a simple structure, are easy to manufacture, can effectively improve the overall structural strength, and have high reliability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the cross-sectional structure of a display device in the related art.

[0019] Figure 2 This is a schematic cross-sectional view of the first display device in the embodiments of this application.

[0020] Figure 3 for Figure 2 A schematic diagram of the unfolded structure of the display device.

[0021] Figure 4 This is a cross-sectional structural diagram of the second display device in the embodiments of this application.

[0022] Figure 5 for Figure 4 A schematic diagram of the unfolded structure of the display device.

[0023] Figure 6 This is a schematic diagram of the unfolded structure of the third display device in the embodiments of this application.

[0024] Figure 7 This is a schematic diagram of the unfolded structure of a first limiting structure in an embodiment of this application.

[0025] Figure 8This is a schematic diagram of the unfolded structure of another first limiting structure in the embodiments of this application.

[0026] Reference numerals: 1. Cover plate; 2. Display panel; 2-1. First planar area; 2-2. Second planar area; 2-3. Bending area; 3. Heat dissipation film; 4. Dispensing structure; 5. First limiting structure; 6. Transition structure; 7. Back film; 8. Second limiting structure; 9. Flexible circuit board; 10. Component; 11. Driver chip; 12. Polarizing layer; 13. Optical adhesive layer; 14. Protective adhesive layer; 15. Spacer layer. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0028] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] like Figure 1 The diagram shown is a cross-sectional schematic of a display device in the related art, including a cover plate 1 (Cover), an optical adhesive layer 13 (OCA), a polarizing layer 12 (POL), and a display panel 2 (PNL) stacked together. The display panel 2 includes a first planar region 2-1, a bending region 2-3, and a second planar region 2-2. Both the first planar region 2-1 and the second planar region 2-2 are provided with a back film 7 (BF). A heat dissipation film 3 (SCF) is provided on the side of the first planar region 2-1 near the second planar region 2-2. A spacer layer 15 (SP) is provided between the heat dissipation film 3 and the second planar region 2-2. A flexible circuit board 9 (FPC) is connected to the far end of the second planar region 2-2. A driver chip 11 (IC) is connected to the second planar region 2-2.

[0030] To provide higher structural strength, current mass-produced products will... Figure 1A dispensing structure 4 is added to the bending zone 2-3 to improve the support strength of the bending zone 2-3. However, in the actual manufacturing process, the dispensing structure 4 has various problems, resulting in poor dispensing effect or affecting the assembly of the module or the whole machine. For example, glue overflow may occur during dispensing or bending, overflowing onto the heat dissipation film 3, the spacer layer 15, or exceeding both ends, which affects the assembly of the whole machine or the bonding of the module, and reduces the overall structural strength. It is advisable to consider designing a limiting structure to guide or block the overflow of glue, so as to avoid affecting the assembly of the module and the whole machine and improve the overall structural strength of the module.

[0031] The following describes specific embodiments in conjunction with... Figures 2 to 8 The technical solution of this application will be described in detail below.

[0032] Some embodiments of this application provide a display device, such as... Figure 2 As shown, the display panel 2 and cover plate 1 are stacked together. The display panel 2 includes a first planar area 2-1, a second planar area 2-2, and a bending area 2-3 connecting the first planar area 2-1 and the second planar area 2-2. The first planar area 2-1 is disposed near the cover plate 1. A heat dissipation film 3 is provided on the side of the first planar area 2-1 near the second planar area 2-2. A dispensing structure 4 is provided on the inner side of the bending area 2-3. A first limiting structure 5 is provided on the side of the first planar area 2-1 near the second planar area 2-2 and / or on the side of the second planar area 2-2 near the first planar area 2-1. The first limiting structure 5 is located between the heat dissipation film 3 and the dispensing structure 4 and is used to restrict the flow of adhesive from the dispensing structure 4 to the heat dissipation film 3.

[0033] like Figure 2 As shown, the display device includes a display panel 2 and a cover plate 1. The cover plate 1 is, for example, a glass plate, used to cover the display panel 2 for protection. The display panel 2 is, for example, an OLED flexible panel, used to display images. Typically, the size of the cover plate 1 is larger than the size of the display panel 2.

[0034] The display panel 2 includes a first planar area 2-1, a second planar area 2-2, and a bending area 2-3 connecting the first planar area 2-1 and the second planar area 2-2. The first planar area 2-1 is the display area, used to display images; the second planar area 2-2 is a non-display area, where a driver chip 11 can be installed, a flexible circuit board 9 can be connected, etc., for circuit control; the bending area 2-3 connects the first planar area 2-1 and the second planar area 2-2, and is used to bend the second planar area 2-2 to the back of the first planar area 2-1 to achieve a narrow bezel effect.

[0035] A heat dissipation film 3, made of, for example, copper, is provided on the side of the first plane region 2-1 near the second plane region 2-2. This film helps dissipate heat, improves the reliability and lifespan of the display panel 2, and can improve the efficiency of charge carrier injection into the organic layer of the display panel 2, thereby improving display brightness, color accuracy and overall quality.

[0036] The inner side of the bending area 2-3 away from the cover plate 1 is provided with a dispensing structure 4. The material of the dispensing structure 4 is, for example, UV glue, which can support the bending area 2-3, and can also seal and prevent moisture, ensuring the stability of the display device.

[0037] A first limiting structure 5 is provided on the side of the first plane area 2-1 near the second plane area 2-2 and / or on the side of the second plane area 2-2 near the first plane area 2-1. The first limiting structure 5 may be provided only in the first plane area 2-1, only in the second plane area 2-2, or simultaneously in both the first plane area 2-1 and the second plane area 2-2; the specific provision is not limited. Figure 2 As shown, a first limiting structure 5 is provided in both the first plane region 2-1 and the second plane region 2-2. The first limiting structure 5 is, for example, a protruding structure or a recessed structure. The first limiting structure 5 is located between the heat dissipation film 3 and the dispensing structure 4, and can restrict the flow of adhesive from the dispensing structure 4 to the heat dissipation film 3.

[0038] By setting the first limiting structure 5 to restrict the position of the dispensing structure 4, it is possible to prevent glue from overflowing onto the heat dissipation film 3 during bending, which will not affect the assembly of the module and the whole machine, and ensure the support strength of the bending area 2-3. This can effectively improve the overall structural strength of the display device, enhance the controllability of the dispensing structure 4, and thus improve the strength consistency of the display device.

[0039] The display device can be a product or component with display function, such as a mobile phone, tablet computer, laptop computer, digital camera, or navigator. The display device has a simple structure, is easy to manufacture, can effectively improve the overall structural strength, and has high reliability.

[0040] In some embodiments, such as Figure 2 and Figure 3 As shown, the first limiting structure 5 is a strip-shaped protrusion, which extends along the length direction of the dispensing structure 4.

[0041] like Figure 3 As shown, Figure 2 The diagram shows the unfolded structure of the display device. In the diagram, the L direction represents the length of the dispensing structure 4, and the W direction represents the width of the dispensing structure 4. The first limiting structure 5 is a strip-shaped protrusion, made of, for example, screen printing ink. The strip-shaped protrusion extends along the length of the dispensing structure 4, as shown below. Figure 2As shown, the strip-shaped protrusions can block the dispensing structure 4, reducing the speed and extent of adhesive overflow. The length of the strip-shaped protrusions can be greater than or equal to the length of the dispensing structure 4, covering the dispensing structure 4 along its width to ensure effective limiting. Simultaneously providing strip-shaped protrusions in both the first plane region 2-1 and the second plane region 2-2 further enhances the dispensing limiting effect. The thickness of the strip-shaped protrusions is, for example, less than half the thickness of the heat dissipation film 3. Care must be taken to position the strip-shaped protrusions to avoid obstructing the heat dissipation film 3.

[0042] In some embodiments, such as Figure 4 and Figure 5 As shown, the first limiting structure 5 is a strip-shaped groove, which extends along the length direction of the dispensing structure 4.

[0043] like Figure 4 As shown, this is a cross-sectional structural diagram of another display device. The first limiting structure 5 can be a groove structure, which can play a guiding role when the glue overflows from the dispensing structure 4, so that the overflowing glue tends to flow towards the groove structure and avoids flowing towards the heat dissipation film 3.

[0044] like Figure 5 As shown, Figure 4 The schematic diagram of the unfolded structure of the display device shows that the first limiting structure 5 can be a strip-shaped groove. A back film 7 is typically provided on the display panel 2. The strip-shaped groove is achieved, for example, by patterning the back film 7. The strip-shaped groove extends along the length of the dispensing structure 4, as shown in the diagram. Figure 4 As shown, this serves to guide the flow of adhesive, preventing excess adhesive from flowing towards the heat dissipation film 3, thereby controlling the amount of adhesive overflow beyond this area. The length of the strip-shaped groove can be greater than or equal to the length of the dispensing structure 4, covering the dispensing structure 4 along its width to ensure effective drainage. Simultaneously setting strip-shaped grooves in both the first plane area 2-1 and the second plane area 2-2 provides better control over the dispensing. Care must be taken to ensure that the strip-shaped grooves avoid obstructing the heat dissipation film 3 or the spacer layer 15.

[0045] In some embodiments, such as Figure 6 As shown, the first limiting structure 5 is a block-shaped groove, which is located at the edge of the first plane area 2-1 or the second plane area 2-2. There are multiple block-shaped grooves located on one side of the dispensing structure 4, and the multiple block-shaped grooves are spaced apart along the length direction of the dispensing structure 4.

[0046] When the first limiting structure 5 is designed as a groove structure, if the groove structure is a strip-shaped groove, stress concentration is likely to occur. This will cause the bending trajectory to deviate from the preset trajectory when bending the display panel 2, affecting the product performance. Therefore, a block-shaped groove design could be considered. For example... Figure 6As shown, multiple block-shaped grooves are provided near the edge of the dispensing structure 4 in the first plane area 2-1 or the second plane area 2-2. These block-shaped grooves are spaced apart, forming a serrated edge. This allows excess adhesive to flow into the block-shaped grooves, reducing the amount of adhesive overflowing into the heat dissipation film 3 and preventing stress dispersion, thus avoiding changes to the bending trajectory of the display panel 2. The cross-sectional shape of the block-shaped grooves can be, for example, rectangular, triangular, or semi-circular, and is not specifically limited. Figure 7 As shown, the cross-sectional shape of the block-shaped groove is rectangular, as... Figure 8 As shown, the cross-sectional shape of the block-shaped groove is semi-circular, which can be selected as needed.

[0047] In some embodiments, such as Figure 7 As shown, a transition structure 6 is formed near the edge of the dispensing structure 4 in the block-shaped groove.

[0048] like Figure 7 As shown, a transition structure 6 is formed near the edge of the block-shaped groove and the dispensing structure 4. The transition structure 6 is, for example, a slope or a chamfer. In this way, when the dispensing structure 4 overflows, the adhesive tends to flow into the block-shaped groove through the transition structure 6, thus ensuring the control effect of the dispensing structure 4.

[0049] In some embodiments, such as Figure 4 As shown, a back film 7 is provided on the side of the first planar region 2-1 near the second planar region 2-2 and on the side of the second planar region 2-2 near the first planar region 2-1. The first limiting structure 5 is a groove structure formed on the back film 7, and the depth of the groove structure is less than or equal to half the thickness of the back film 7.

[0050] like Figure 4 As shown, a back film 7 is provided in the first planar area 2-1 and the second planar area 2-2. The back film 7 is used to protect the display panel 2 and balance stress. When the first limiting structure 5 is a groove structure, the back film 7 can be manufactured by a patterning process. The depth of the groove structure should be less than or equal to half the thickness of the back film 7 to avoid the groove structure being too deep and affecting the bending trajectory of the display panel 2. The depth of the groove structure can be designed to be less than or equal to 1 / 3 of the thickness of the back film 7, so that depth capacity can be provided even if dimensional deviations occur during actual manufacturing.

[0051] In some embodiments, such as Figure 3 As shown, the display panel 2 is provided with a second limiting structure 8, which is located on both sides of the dispensing structure 4 along its length direction, and is used to restrict the overflow of adhesive from the dispensing structure 4 along the length direction.

[0052] like Figure 3As shown, the display panel 2 is also provided with a second limiting structure 8. The second limiting structure 8 is similar to the first limiting structure 5 and can be a groove structure or a protrusion structure. The second limiting structure 8 is located on opposite sides of the dispensing structure 4 along its length, restricting the flow of adhesive overflow along the length of the dispensing structure 4. This prevents adhesive overflow onto both sides of the bending area 2-3 during bending, thus avoiding affecting the assembly of the module and the entire device, ensuring the support strength of the bending area 2-3, and effectively improving the overall structural strength of the display device. The second limiting structure 8, in conjunction with the first limiting structure 5, enhances the controllability of the dispensing structure 4, thereby improving the consistency of the display device's strength.

[0053] In some embodiments, such as Figure 3 As shown, the second limiting structure 8 is a strip-shaped protrusion disposed on the inner side of the bending area 2-3. The strip-shaped protrusion extends along the width direction of the dispensing structure 4 and is spaced apart from the first limiting structure 5.

[0054] like Figure 3 As shown, the second limiting structure 8 is a strip-shaped protrusion located on the inner side of the bending area 2-3. The material is, for example, screen printing ink. The strip-shaped protrusion extends along the width direction of the dispensing structure 4, which can block the dispensing structure 4 and reduce the speed and extent of adhesive overflow. The second limiting structure 8 can be spaced apart from the first limiting structure 5. Because the second limiting structure 8 is also a strip-shaped protrusion, it is prone to arching when bending in the bending area 2-3, affecting the structural morphology. This spaced arrangement provides capacity space for the second limiting structure 8 during bending, and also provides space for overflow when the amount of adhesive overflow is large, further preventing the overflow from flowing towards the heat dissipation film 3, etc. The width / thickness of the second limiting structure 8 can be the same as or different from the first limiting structure 5; no specific limitation is imposed.

[0055] In some embodiments, such as Figure 5 As shown, the second limiting structure 8 is a strip-shaped groove provided in the first plane area 2-1 or the second plane area 2-2. The strip-shaped groove extends along the width direction of the dispensing structure 4 and is connected to the first limiting structure 5.

[0056] like Figure 5 As shown, the second limiting structure 8 can also be a strip-shaped groove. Since the bending area 2-3 does not have a backing film 7, to ensure the structural strength of the bending area 2-3, the strip-shaped groove can be set in the first plane area 2-1 or the second plane area 2-2, and manufactured together with the first limiting structure 5. The strip-shaped groove extends along the width direction of the dispensing structure 4, which can play a role in guiding the flow and controlling the degree of glue overflow beyond this area. The second limiting structure 8 and the first limiting structure 5 can be connected to jointly limit glue overflow. The width / depth of the second limiting structure 8 can be the same as or different from that of the first limiting structure 5, and there is no specific limitation.

[0057] In some embodiments, such as Figure 5 As shown, the dispensing structure 4 is provided with the first limiting structure 5 on both sides along the width direction, and the two ends of the first limiting structure 5 are connected to the second limiting structure 8. Adjacent second limiting structures 8 are spaced apart along the width direction.

[0058] like Figure 5 As shown, a first limiting structure 5 and a second limiting structure 8 are provided on both sides of the dispensing structure 4. The limiting structures are all strip-shaped grooves. The second limiting structures 8 adjacent to each other along the width direction can be spaced apart. When the amount of glue overflow is large, it can provide space for the glue overflow and further prevent the glue overflow from flowing to the heat dissipation film 3, etc.

[0059] In some embodiments, such as Figure 2 As shown, a flexible circuit board 9 is provided on the side of the heat dissipation film 3 away from the first planar area 2-1. The flexible circuit board 9 is connected to the second planar area 2-2. A component 10 is provided on the side of the flexible circuit board 9 away from the first planar area 2-1. A driving chip 11 is provided on the side of the second planar area 2-2 away from the first planar area 2-1. A spacer layer 15 is provided between the heat dissipation film 3 and the second planar area 2-2. A polarizing layer 12 and an optical adhesive layer 13 are stacked between the first planar area 2-1 and the cover plate 1. The polarizing layer 12 is disposed close to the first planar area 2-1. A protective adhesive layer 14 is provided on the outer side of the bending area 2-3.

[0060] like Figure 2 As shown, a spacer layer 15 is provided between the heat dissipation film 3 and the second plane region 2-2. The spacer layer 15 serves a supporting function to ensure structural stability. The heat dissipation film 3 covers the spacer layer 15 to ensure adhesion.

[0061] A flexible circuit board 9 is provided on the side of the heat dissipation film 3 away from the first plane area 2-1. Components 10 are provided on the flexible circuit board 9. Components 10 can be copper leakage area, capacitor and resistor area (block), piano cover, timing controller (t-con), non-volatile memory (flash), shielding cover, etc. A driver chip 11 is provided on the second plane area 2-2.

[0062] A polarizing layer 12 and an optical adhesive layer 13 are also provided between the first planar area 2-1 and the cover plate 1. The optical adhesive layer 13 is used to bond the cover plate 1 and the polarizing layer 12. At the same time, in the folded display device, the low-modulus optical adhesive layer 13 can reduce the stress between the layers and prevent peeling during the bending process of the module. The polarizing layer 12 can prevent external ambient light from interfering with the display effect. A protective adhesive layer 14 is provided on the outside of the bending area 2-3 to further protect the bending area 2-3 and ensure structural strength.

[0063] In some embodiments, the display panel 2 includes: a thin-film encapsulation layer disposed on the outermost layer of the display panel 2, used to block external dust and moisture, etc., to prevent external dust and moisture from affecting the internal film layers; a thin-film transistor array layer disposed on one side of the thin-film encapsulation layer; and an OLED device layer disposed on the side of the thin-film transistor array layer away from the thin-film encapsulation layer, including multiple OLED display devices. Each OLED display device includes an anode layer, a cathode layer, a light-emitting functional layer, an electron transport layer, a hole transport layer, and a hole injection layer. The anode layer is electrically connected to the drain of the thin-film transistor array layer. The cathode layer is made of a low work function material, which can improve the efficiency of electron injection and reduce the Joule heat generated during OLED operation, thereby improving the device lifespan.

[0064] The light-emitting functional layer is used for emitting light. Multiple light-emitting layers are set to improve the brightness of the OLED device. The light-emitting layer can include a host material and a guest material doped in the host material. The doping ratio of the guest material in the light-emitting layer is 1% to 20%. Within this doping ratio range, on the one hand, the host material of the light-emitting layer can effectively transfer exciton energy to the guest material to excite the guest material to emit light; on the other hand, the host material "dilutes" the guest material, effectively improving fluorescence quenching caused by intermolecular collisions and energy collisions in the guest material, thus improving luminous efficiency and device lifetime. In an exemplary embodiment, the doping ratio refers to the ratio of the mass of the guest material to the mass of the light-emitting layer, i.e., mass percentage. In an exemplary embodiment, the host material and the guest material can be deposited together using a multi-source evaporation process, so that the host material and the guest material are uniformly dispersed in the light-emitting layer. The doping ratio can be controlled by controlling the evaporation rate of the guest material or by controlling the ratio of the evaporation rates of the host material and the guest material during the evaporation process.

[0065] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application (including the claims) is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in the details for the sake of brevity.

[0066] In the embodiments of this application, "film" and "layer" can be interchanged. For example, sometimes "conductive layer" can be replaced with "conductive film". Similarly, sometimes "insulating film" can be replaced with "insulating layer". The scale of the drawings in the embodiments of this application can be used as a reference in actual processes, but is not limited thereto. For example, the aspect ratio of the channel, the thickness and spacing of each film layer can be adjusted according to actual needs. The number of pixels in the array substrate and the number of sub-pixels in each pixel are not limited to the quantities shown in the figures. The drawings described in the embodiments of this application are only structural schematic diagrams, and one method in the embodiments of this application is not limited to the shapes or values ​​shown in the drawings.

[0067] In the embodiments of this application, triangles, rectangles, trapezoids, pentagons, or hexagons are not strictly defined, but can be approximate triangles, rectangles, trapezoids, pentagons, or hexagons, etc., and may have some small deformations due to tolerances, and may have chamfers, curved edges, and other deformations.

[0068] Furthermore, given that details have been set forth to describe exemplary embodiments of this application, it will be apparent to those skilled in the art that embodiments of this application may be practiced without these details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0069] In some embodiments of this application, a method for manufacturing a display device is provided, including forming a cover plate 1 on a first surface of a first planar region 2-1 of a display panel 2, forming a heat dissipation film 3 on a second surface of the first planar region 2-1, forming a first limiting structure 5 on a second surface of the first planar region 2-1 and / or on a second surface of a second planar region 2-2 of the display panel 2, and forming a dispensing structure 4 on a second surface of a bending region 2-3 of the display panel 2.

[0070] The "patterning process" described in this application includes, for metallic, inorganic, or transparent conductive materials, processes such as photoresist coating, mask exposure, development, etching, and photoresist stripping; for organic materials, it includes processes such as organic material coating, mask exposure, and development. Deposition can be performed using any one or more of sputtering, evaporation, and chemical vapor deposition; coating can be performed using any one or more of spraying, spin coating, and inkjet printing; and etching can be performed using any one or more of dry and wet etching, without limitation.

[0071] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application (including the claims) is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in the details for the sake of brevity.

[0072] Additionally, to simplify the description and discussion, and to avoid obscuring the embodiments of this application, well-known power / ground connections to other components may or may not be shown in the provided drawings. Furthermore, the apparatus may be illustrated in block diagram form to avoid obscuring the embodiments of this application, and this also takes into account the fact that the details of implementation of these block diagram apparatuses are highly dependent on the platform on which the embodiments of this application will be implemented (i.e., these details should be entirely within the understanding of those skilled in the art). While specific details have been set forth to describe exemplary embodiments of this application, it will be apparent to those skilled in the art that the embodiments of this application may be implemented without these specific details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0073] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications, and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. The embodiments of this application are intended to cover all such substitutions, modifications, and variations falling within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A display device, characterized in that, The invention includes a display panel and a cover plate stacked together. The display panel includes a first planar area, a second planar area, and a bent area connecting the first planar area and the second planar area. The first planar area is disposed near the cover plate. A heat dissipation film is provided on the side of the first planar area near the second planar area. An adhesive dispensing structure is provided on the inner side of the bent area. A first limiting structure is provided on the side of the first planar region near the second planar region and / or on the side of the second planar region near the first planar region. The first limiting structure is located between the heat dissipation film and the dispensing structure, and is used to restrict the flow of adhesive from the dispensing structure to the heat dissipation film.

2. The display device according to claim 1, characterized in that, The first limiting structure is a strip-shaped protrusion that extends along the length of the dispensing structure.

3. The display device according to claim 1, characterized in that, The first limiting structure is a strip-shaped groove, which extends along the length of the dispensing structure.

4. The display device according to claim 1, characterized in that, The first limiting structure is a block-shaped groove, which is located at the edge of the first planar area or the second planar area. There are multiple block-shaped grooves located on one side of the dispensing structure, and the multiple block-shaped grooves are spaced apart along the length direction of the dispensing structure.

5. The display device according to claim 4, characterized in that, The blocky groove has a transition structure near the edge of the dispensing structure.

6. The display device according to claim 1, characterized in that, A back film is provided on the side of the first planar region near the second planar region and on the side of the second planar region near the first planar region. The first limiting structure is a groove structure formed on the back film, and the depth of the groove structure is less than or equal to half the thickness of the back film.

7. The display device according to claim 1, characterized in that, The display panel is provided with a second limiting structure, which is located on opposite sides of the dispensing structure along its length direction, and is used to restrict the overflow of adhesive from the dispensing structure along its length direction.

8. The display device according to claim 7, characterized in that, The second limiting structure is a strip-shaped protrusion disposed on the inner side of the bending area. The strip-shaped protrusion extends along the width direction of the dispensing structure and is spaced apart from the first limiting structure.

9. The display device according to claim 7, characterized in that, The second limiting structure is a strip-shaped groove disposed in the first planar area or the second planar area. The strip-shaped groove extends along the width direction of the dispensing structure and is connected to the first limiting structure.

10. The display device according to claim 9, characterized in that, The dispensing structure is provided with the first limiting structure on both sides along the width direction, and the two ends of the first limiting structure are connected to the second limiting structure. Adjacent second limiting structures are spaced apart along the width direction.

11. The display device according to claim 1, characterized in that, A flexible circuit board is provided on the side of the heat dissipation film away from the first planar area. The flexible circuit board is connected to the second planar area. Components are provided on the side of the flexible circuit board away from the first planar area. A driver chip is provided on the side of the second planar area away from the first planar area. A spacer layer is provided between the heat dissipation film and the second planar area. A polarizing layer and an optical adhesive layer are stacked between the first planar area and the cover plate. The polarizing layer is disposed close to the first planar area, and a protective adhesive layer is disposed on the outer side of the bending area.

12. A method for manufacturing a display device, characterized in that, The method includes forming a cover plate on a first surface of a first planar region of the display panel, forming a heat dissipation film on a second surface of the first planar region, forming a first limiting structure on the second surface of the first planar region and / or the second surface of the second planar region of the display panel, and forming a dispensing structure on the second surface of the bending region of the display panel.

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