Display panel, electronic device and manufacturing method of display panel

Abstract

The present disclosure provides a display panel, an electronic device and a manufacturing method of the display panel, and belongs to the technical field of electronics. The display panel comprises a display substrate and a cover plate assembly. The display substrate comprises a substrate planar part and a substrate curved part, and the substrate curved part is connected with the outer edge of the substrate planar part. The cover plate assembly comprises a cover plate planar part and a cover plate curved part, the cover plate curved part is connected with the outer edge of the cover plate planar part, the cover plate planar part is attached to the substrate planar part, the cover plate curved part is attached to the substrate curved part, and the refractive index of the cover plate curved part is different from the refractive index of the cover plate planar part. The present disclosure can guarantee the overall imaging effect of the display panel.

Description

Technical Field

[0001] This disclosure belongs to the field of electronic technology, and specifically relates to a display panel, an electronic device, and a method for manufacturing the display panel. Background Technology

[0002] A curved screen is a type of display panel commonly used in electronic devices. This panel is typically a flexible organic electroluminescence display (OLED). The central portion of the display panel is flat, located on the front panel of the electronic device, while the edges are curved, extending to the sides of the device. This design increases the area of ​​the display panel.

[0003] In related technologies, display panels mainly include display substrates and cover plate assemblies. The cover plate assembly includes optical adhesive and a glass cover. The edges of both the glass cover and the display panel are curved. The glass cover is bonded to the display substrate by optical adhesive.

[0004] However, since the edges of the display substrate and the glass cover are curved, the optical adhesive located on the curved surface will deform under the pressure of the display substrate and the glass cover, resulting in the thickness of the optical adhesive at that location being different from the thickness of the optical adhesive at other locations, which affects the overall imaging effect of the display panel. Summary of the Invention

[0005] In order to solve the above-mentioned technical problems, the purpose of this disclosure is to provide a display panel, an electronic device, and a method for manufacturing a display panel, which can ensure the overall imaging effect of the display panel.

[0006] To achieve the above objectives, the technical solution adopted in this disclosure is as follows:

[0007] According to one aspect of this disclosure, a display panel is provided, including a display substrate and a cover plate assembly;

[0008] The display substrate includes a flat substrate portion and a curved substrate portion, wherein the curved substrate portion is connected to the outer edge of the flat substrate portion.

[0009] The cover plate assembly includes a flat cover plate portion and a curved cover plate portion. The curved cover plate portion is connected to the outer edge of the flat cover plate portion. The flat cover plate portion is fitted to the flat substrate portion. The curved cover plate portion is fitted to the curved substrate portion. The refractive index of the curved cover plate portion is different from that of the flat cover plate portion.

[0010] In one implementation of this disclosure, the refractive index of the curved surface of the cover plate varies with the curvature of the curved surface of the cover plate;

[0011] The greater the curvature of the curved surface of the cover plate, the greater the refractive index.

[0012] In another implementation of this disclosure, the refractive index of the curved portion of the cover plate changes uniformly with the curvature until the refractive indices of the curved portion of the cover plate and the flat portion of the cover plate are equal at the location where they connect with the flat portion of the cover plate.

[0013] In another implementation of this disclosure, the cover plate curved surface includes a colloidal curved surface and a cover plate curved surface sequentially stacked on the display substrate;

[0014] The refractive index of the curved surface of the cover varies with the curvature of the surface, and / or the refractive index of the curved surface of the colloidal body varies with the curvature of the surface.

[0015] In another implementation of this disclosure, the refractive index of the curved surface of the cover is controlled by applying a coating to the curved surface and / or controlling the change in the thickness of the curved surface; and / or,

[0016] The refractive index of the colloidal curved surface is controlled by doping the colloidal curved surface and / or by controlling the change in the thickness of the colloidal curved surface.

[0017] In another implementation of this disclosure, the step of applying a coating to the curved surface of the cover body includes:

[0018] At least one of the following substances is provided on the side of the curved surface of the cover body facing the curved surface of the colloidal body: a polymer for increasing the refractive index of the curved surface of the cover body, and a polymer for decreasing the refractive index of the curved surface of the cover body;

[0019] The doping of the colloidal curved surface includes:

[0020] The colloidal curved surface is doped with at least one of the following substances: colloidal particles, high-atomic-number carbon atom polymers.

[0021] In another implementation of this disclosure, the curved portion of the cover plate is located at least on any curved side of the display panel.

[0022] According to another aspect of this disclosure, an electronic device is provided, including a display panel;

[0023] The display panel is the same as the one described above.

[0024] According to another aspect of this disclosure, a method for manufacturing a display panel is provided, applicable to the display panel described above, the method comprising:

[0025] The cover plate is fabricated with a flat portion and a curved portion, wherein the refractive index of the curved portion is different from that of the flat portion.

[0026] The flat portion and the curved portion of the cover plate are attached to the display substrate.

[0027] In one implementation of this disclosure, fabricating the planar portion and the curved portion of the cover plate includes:

[0028] Establish a simulation model of the display panel;

[0029] Based on the simulation model, determine the refractive index of the planar portion and the curved portion of the cover plate;

[0030] The flat portion and the curved portion of the cover plate are fabricated according to their refractive indices.

[0031] In another implementation of this disclosure, determining the refractive index of the planar portion and the curved portion of the cover plate based on the simulation model includes:

[0032] Based on the simulation model, the curvature of the cover plate surface is determined;

[0033] The refractive index of the curved surface of the cover plate is determined based on its curvature, such that the position with greater curvature in the curved surface of the cover plate corresponds to a greater refractive index.

[0034] In another implementation of this disclosure, determining the refractive index of the cover plate's curved surface based on its curvature includes:

[0035] The refractive index of the curved part of the cover plate is uniformly varied with the curvature until the refractive index of the curved part of the cover plate is equal to that of the flat part of the cover plate at the position where it connects with the flat part of the cover plate.

[0036] The beneficial effects of the technical solutions provided in this disclosure are at least:

[0037] When using the display panel provided in this embodiment, the planar portion of the display substrate and the planar portion of the cover plate are bonded together, and the curved portion of the display substrate and the curved portion of the cover plate are bonded together. In this way, light emitted from the planar portion of the display substrate can be transmitted through the planar portion of the cover plate, and light emitted from the curved portion of the display substrate can be transmitted through the curved portion of the cover plate. Since the refractive index of the curved portion of the cover plate is different from that of the planar portion, it can compensate for image distortion caused by the deformation of the curved portion of the cover plate relative to the planar portion, thus ensuring the overall imaging effect of the display panel.

[0038] In other words, the display panel provided in this embodiment ensures that the imaging of the flat part and the curved part of the display substrate are similar by designing the refractive index of the flat part of the cover plate to be different from that of the curved part of the cover plate, thereby ensuring the overall imaging effect of the display panel. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of a display panel provided in an embodiment of the present disclosure;

[0041] Figure 2 This is a cross-sectional view of a display panel provided in an embodiment of this disclosure;

[0042] Figure 3 This is another structural schematic diagram of the display panel provided in an embodiment of this disclosure;

[0043] Figure 4 This is another cross-sectional view of the display panel provided in an embodiment of this disclosure;

[0044] Figure 5 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this disclosure;

[0045] Figure 6 This is a flowchart of a method for manufacturing a display panel according to an embodiment of this disclosure.

[0046] The symbols in the diagram represent the following meanings:

[0047] 10. Display substrate;

[0048] 101. Flat portion of substrate; 102. Curved portion of substrate;

[0049] 20. Cover plate assembly;

[0050] 201. Flat portion of the cover plate; 202. Curved portion of the cover plate;

[0051] 210. Optical adhesive;

[0052] 211. Planar portion of the colloidal substance; 212. Curved portion of the colloidal substance; 213. First connecting line;

[0053] 220. Faceplate;

[0054] 221. Flat part of the cover; 222. Curved part of the cover; 223. Second connecting line;

[0055] 1. Housing; 2. Display panel. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0057] Curved screens are a common type of flexible display panel, typically made of flexible organic light-emitting diodes (OLEDs). These display panels are commonly used in electronic devices such as mobile phones and tablets.

[0058] The central portion of the display panel is flat and located on the front panel of the electronic device, while the edges of the display panel are curved, extending to the sides of the electronic device. This increases the area of ​​the display panel, thereby increasing the screen-to-body ratio of the electronic device.

[0059] In related technologies, a display panel mainly includes a display substrate and a cover plate assembly. The display substrate is used to emit light and form images, while the cover plate assembly is attached to one side of the display substrate to protect it. The cover plate assembly includes optical adhesive and a glass cover. Both the glass cover and the edges of the display panel are curved, and the glass cover is bonded to the display substrate using optical adhesive.

[0060] However, since the edges of the display substrate and the glass cover are curved, the optical adhesive located on the curved surface will deform under the pressure of the display substrate and the glass cover, resulting in the thickness of the optical adhesive at that location being different from the thickness of the optical adhesive at other locations, which affects the overall imaging effect of the display panel.

[0061] To address the aforementioned technical problems, this disclosure provides a display panel. Figure 1 See the schematic diagram of the display panel. Figure 1 The display panel includes a display substrate 10 and a cover plate assembly 20.

[0062] Figure 2 This is a cross-sectional view of a display panel, combined with... Figure 2 The display substrate 10 includes a flat substrate portion 101 and a curved substrate portion 102, with the curved substrate portion 102 connected to the outer edge of the flat substrate portion 101. The cover plate assembly 20 includes a flat cover plate portion 201 and a curved cover plate portion 202, with the curved cover plate portion 202 connected to the outer edge of the flat cover plate portion 201. The flat cover plate portion 201 is in contact with the flat substrate portion 101, and the curved cover plate portion 202 is in contact with the curved substrate portion 102. The refractive index of the curved cover plate portion 202 is different from that of the flat cover plate portion 201.

[0063] When using the display panel provided in this embodiment, the substrate planar portion 101 and the cover plate planar portion 201 of the display substrate 10 are bonded together, and the substrate curved portion 102 and the cover plate curved portion 202 of the display substrate 10 are bonded together. In this way, light emitted from the substrate planar portion 101 of the display substrate 10 can be transmitted through the cover plate planar portion 201, and light emitted from the substrate curved portion 102 of the display substrate 10 can be transmitted through the cover plate curved portion 202. Since the refractive index of the cover plate curved portion 202 is different from that of the cover plate planar portion 201, it can compensate for image distortion caused by the deformation of the cover plate curved portion 202 relative to the cover plate planar portion 201, thus ensuring the overall imaging effect of the display panel.

[0064] In other words, the display panel provided in this embodiment ensures that the refractive index of the cover plate flat portion 201 and the refractive index of the cover plate curved portion 202 are designed differently, thereby ensuring that the imaging of the substrate flat portion 101 and the substrate curved portion 102 of the display substrate 10 is similar, and thus ensuring the overall imaging effect of the display panel.

[0065] In this embodiment, the substrate planar portion 101 of the display substrate 10 is rectangular, and the cover plate planar portion 201 is a corresponding rectangle. The substrate curved portion 102 of the display substrate 10 is connected to the side of the substrate planar portion 101. By adjusting the number of substrate curved portions 102 and the different arrangement positions of the substrate curved portions 102 on the substrate planar portion 101, the display panel can be a double-curved panel or a quadruple-curved panel.

[0066] The cover plate curved surface 202 is located at least on any curved side of the display panel. When the display panel is a hyperboloid panel, the display substrate 10 has two substrate curved surface 102s, each connected to one of the two long sides of the substrate flat portion 101. In this case, there are also two cover plate curved surface 202s, each corresponding to one of the two substrate curved surface 102s. When the display panel is a quadruple-curved panel, the display panel has four substrate curved surface 102s, each connected to one of the four sides of the substrate flat portion 101. In this case, there are also four cover plate curved surface 202s, each corresponding to one of the four substrate curved surface 102s. It is readily understood that the type of display panel can be selected according to actual needs, and this application does not limit this selection.

[0067] In this embodiment, the display substrate 10 includes a polarizer, an organic light-emitting layer, etc. The polarizer is used to counteract the influence of ambient light on the display panel, and the organic light-emitting layer is used to emit light to achieve image formation on the display panel. In other words, the display substrate 10 can operate under the drive of a driving circuit to display an image.

[0068] As mentioned above, the refractive index of the curved portion 202 of the cover plate is different from that of the flat portion 201. In this embodiment, there are two possible implementation methods. The first is that the refractive index of the flat portion 201 remains constant, while the refractive index of the curved portion 202 gradually changes compared to the flat portion 201. The second is that the refractive index of the flat portion 201 remains constant, while the refractive index of the curved portion 202 changes at the same rate compared to the flat portion 201. These two implementation methods will be described below.

[0069] Compared to the gradual change in refractive index of the cover plate's curved portion 202, which is relative to the flat portion 201, the thickness of the curved portion 202 tends to vary. This variation in thickness affects the refractive index. Therefore, to ensure the overall imaging effect of the curved portion 202, the refractive index of the curved portion 202 can optionally vary with its curvature; the larger the curvature, the greater the refractive index. In other words, the refractive index of the curved portion 202 is positively correlated with its curvature; it increases as the curvature increases and decreases as the curvature decreases.

[0070] By adjusting the local refractive index of the curved portion 202 of the cover plate, the refractive index of the curved portion 202 can gradually change along a certain direction, thereby eliminating the influence of the thickness variation of the curved portion 202 on the refractive index. The refractive index at any position of the curved portion 202 of the cover plate ensures that the image displayed at that position is not distorted.

[0071] Optionally, the refractive index in the curved portion 202 of the cover plate changes uniformly with the curvature until the refractive indices of the curved portion 202 and the flat portion 201 of the cover plate are equal at the position where they connect with the flat portion 201 of the cover plate.

[0072] In the above implementation, the refractive index of the curved part 202 of the cover plate changes uniformly, which can better compensate for the distortion caused by the curvature of the curved part 202 of the cover plate, resulting in a better overall imaging effect of the display panel.

[0073] As described above, the display panel provided in this embodiment is able to ensure the overall imaging effect of the display panel by controlling the refractive index of the flat portion 201 and the curved portion 202 of the cover plate assembly 20. The structure of the cover plate assembly 20 will be described below.

[0074] Figure 3 This is a schematic diagram of another structure for the display panel. Figure 3 and Figure 1 The perspectives are the same, the difference lies in Figure 3The configuration of the cover plate assembly 20 is further illustrated. Combined with... Figure 3 In this embodiment, the cover plate assembly 20 includes optical adhesive 210 and a faceplate 220, which are sequentially stacked on one side of the display substrate 10 (see [reference]). Figure 4 , Figure 4 and Figure 2 The perspectives are the same, the difference lies in Figure 4 The configuration of the cover assembly 20 is further shown.

[0075] The optical adhesive 210 includes a planar portion 211 and a curved portion 212, with the curved portion 212 connected to the outer edge of the planar portion 211. The cover 220 includes a cover planar portion 221 and a cover curved portion 222, with the curved portion 222 connected to the outer edge of the cover planar portion 221. The planar portion 211 and the cover planar portion 221 constitute the cover plate planar portion 201, and the curved portion 212 and the cover curved portion 222 constitute the cover plate curved portion 202.

[0076] In the above implementation, the cover plate flat portion 201 is composed of a colloid flat portion 211 and a cover body flat portion 221, while the cover plate curved portion 202 is composed of a colloid curved portion 212 and a cover body curved portion 222.

[0077] During the operation of the display panel, the light emitted from the display substrate 10 passes through the optical adhesive 210 and the cover 220 in sequence to form an image. In other words, the refractive index of the curved surface 202 of the cover plate is directly related to the refractive index of the curved surface 212 of the adhesive and the refractive index of the curved surface 222 of the cover plate.

[0078] In this embodiment, the refractive index of the curved surface 222 of the cover varies with the curvature of the surface, and the refractive index of the curved surface 212 of the colloidal body also varies with the curvature of the surface.

[0079] In the above implementation, there are three ways to adjust the refractive index of the curved surface 202 of the cover plate: the first is by adjusting the refractive index of the colloidal curved surface 212; the second is by adjusting the refractive index of the curved surface 222 of the cover plate; and the third is by simultaneously adjusting the refractive indices of both the colloidal curved surface 212 and the curved surface 222 of the cover plate. All three methods can adjust the refractive index of the curved surface 202 of the cover plate, improving the flexibility and feasibility of adjusting the refractive index of the curved surface 202. This application does not restrict the selection of the above three adjustment methods.

[0080] In this embodiment, the refractive index of the colloidal curved surface 212 and the refractive index of the cap curved surface 222 are adjusted in the following manner.

[0081] The refractive index of the colloidal curved surface 212 is controlled by doping the colloidal curved surface 212 and / or controlling the change in the thickness of the colloidal curved surface 212. The refractive index of the cap curved surface 222 is controlled by applying a coating to the cap curved surface 222 and / or controlling the change in the thickness of the cap curved surface 222.

[0082] In other words, the refractive index of the colloidal curved surface 212 can be changed by doping, by adjusting the thickness, or by using both methods simultaneously. Similarly, the refractive index of the cap curved surface 222 can be changed by applying a coating, by adjusting the thickness, or by using both methods simultaneously.

[0083] The following explains how to adjust the refractive index of the colloidal curved section 212.

[0084] In this embodiment, the colloidal curved surface 212 is doped with at least one of the following substances: colloidal particles, high-atomic-number carbon atom polymers.

[0085] In the above implementation, the refractive index of the optical adhesive 210 can be adjusted by doping it with colloidal particles or high-atomic-number carbon atom polymers. Furthermore, since the colloidal particles or high-atomic-number carbon atom polymers are doped only in the curved portion 212 of the adhesive, the curved portion 212 can be precisely adjusted without affecting the planar portion 211 of the adhesive.

[0086] For example, the high-atomic-number carbon atom polymer is a zirconium and hafnium acrylate monomer.

[0087] In the above implementation, the high atomic number is based on a comparison of carbon atoms. Zirconium and hafnium acrylate monomers have excellent transparency, and the refractive index of optical adhesive 210 can be adjusted by selecting functional monomers.

[0088] Optionally, the colloidal planar portion 211 and the colloidal curved portion 212 are bonded together, or the colloidal planar portion 211 and the colloidal curved portion 212 are an integral structure.

[0089] In other words, there are two ways to connect the colloidal planar portion 211 and the colloidal curved portion 212. In the first way, the colloidal planar portion 211 and the colloidal curved portion 212 are baked and molded separately, and then bonded together to create a complete optical adhesive 210. In the second way, optical adhesive 210 doped with the aforementioned material and optical adhesive 210 without the aforementioned material are coated together, and a complete optical adhesive 210 is directly manufactured by baking. It is readily understood that the manufacturing method of the optical adhesive 210 can be selected according to requirements, and this disclosure does not impose any limitations on it.

[0090] The following explains how to adjust the refractive index of the curved part 222 of the cover.

[0091] In this embodiment, at least one of the following substances is provided on the side of the curved surface 222 of the cover body facing the curved surface 212: a polymer for increasing the refractive index of the curved surface 222 of the cover body, and a polymer for decreasing the refractive index of the curved surface 222 of the cover body.

[0092] In the above implementation, by coating the curved surface 222 of the cover with a high refractive index polymer facing the optical adhesive 210, the refractive index of the cover 220 can be increased. By coating the curved surface 222 of the cover with a low refractive index polymer facing the optical adhesive 210, the refractive index of the cover 220 can be decreased. By coating the curved surface 222 of the cover with either a high refractive index polymer or a low refractive index polymer, precise adjustments can be made only to the curved surface 222 of the cover without affecting the flat surface 221 of the cover.

[0093] Furthermore, since both the high-refractive-index polymer and the low-refractive-index polymer are coated on the curved surface 222 of the cover facing the optical adhesive 210, the cover 220 can protect the high-refractive-index polymer and the low-refractive-index polymer, preventing them from being worn and improving the reliability of the display panel.

[0094] For example, the high-refractive-index polymer is an aromatic monomer-based polymer and a brominated aromatic monomer-based polymer, while the low-refractive-index polymer is a fluorinated monomer-based polymer. These two materials can respectively increase or decrease the refractive index of the cover 220, thereby adjusting the refractive index of the cover 220. It is easily understood that when it is necessary to increase the refractive index of the curved surface 222 of the cover, an aromatic monomer-based polymer and a brominated aromatic monomer-based polymer are used in the curved surface 222 of the cover; when it is necessary to decrease the refractive index of the curved surface 222 of the cover, a fluorinated monomer-based polymer is used in the curved surface 222 of the cover.

[0095] Alternatively, by using deposition or vapor deposition processes to deposit aromatic monomer polymers, brominated aromatic monomer polymers, or fluorinated monomer polymers on one side of the cover 220, the reliability of the display panel can be ensured.

[0096] It is easy to understand that avoiding excessive deformation of the colloid curved surface 212 due to excessive compression from the cover 220 and the display substrate 10 helps reduce the difference in refractive index between the colloid curved surface 212 and the colloid planar surface 211, thus facilitating the adjustment of the refractive index of the cover curved surface 202. Based on this, in this embodiment, the size of the colloid curved surface 212 is matched with the size of the gap between the cover curved surface 222 and the substrate curved surface 102 of the display substrate 10. This effectively prevents excessive compression of the colloid curved surface 212 by the cover 220 and the display substrate 10.

[0097] It is easy to understand that the dimensions of the colloidal curved surface 212 can be determined through simulation modeling of the display panel. For example, during the simulation modeling process, by inputting the initial thickness of the colloidal curved surface 212, the applied pressure, the angle of the pressure, etc., the dimensions of the colloidal curved surface 212 can be determined. The dimensions of the colloidal curved surface 212 include thickness, curvature, etc.

[0098] In addition, the dimensions of the curved surface 222 of the cover can also be adjusted according to requirements. The method for determining its dimensions is similar to that for the curved surface 212 of the colloidal body, and will not be repeated here. After determining the dimensions, a graphite mold hot bending process is used to place the ultra-clear glass, which has been precision machined by computer digital control, into a custom graphite mold. After preheating, pressing, and cooling, it is formed into the cover 220.

[0099] Optionally, the thickness of the middle portion of the curved portion 222 of the cover is relatively large, and the thickness gradually decreases as it extends towards the edge of the curved portion 222 of the cover, until it approaches the thickness of the flat portion 221 of the cover. In this way, the refractive index of the curved portion 202 of the cover can transition more smoothly, thereby improving the overall display effect of the display panel.

[0100] For example, the thickness variation of the curved surface 222 of the cover does not exceed 10 μm.

[0101] Regarding the method of making the refractive index of the curved part 202 of the cover plate change equally with the refractive index of the flat part 201 of the cover plate, the refractive index of the curved part 202 of the cover plate is adjusted so that the ratio between the refractive index of the curved part 202 of the cover plate and the refractive index of the flat part 201 of the cover plate is within a threshold range, which is 0.8-1.2. In other words, the ratio between the refractive index of the curved part 202 of the cover plate and the refractive index of the flat part 201 of the cover plate is between 0.8 and 1.2.

[0102] For example, if the refractive index of the flat portion 201 of the cover plate is 1.5, then the refractive index of the curved portion 202 of the cover plate is 1.2-1.8.

[0103] As mentioned above, to control variables, only the refractive index of the colloidal curved portion 212 and the cap curved portion 222 is adjusted, while the refractive index of the colloidal planar portion 211 and the cap planar portion 221 remains unchanged. Therefore, clearly distinguishing the colloidal curved portion 212 from the colloidal planar portion 211, and clearly distinguishing the cap curved portion 222 from the cap planar portion 221, effectively avoids mutual influence between the two regions. Based on this, Figure 4 This is a structural schematic diagram of the cover plate assembly 20, combined with... Figure 4 In this embodiment, a first connecting line 213 is formed at the connection between the colloidal planar portion 211 and the colloidal curved portion 212, and a second connecting line 223 is formed at the connection between the cover planar portion 221 and the cover curved portion 222. The second connecting line 223 corresponds one-to-one with the first connecting line 213, and the second connecting line 223 and the corresponding first connecting line 213 are parallel to each other.

[0104] Optionally, the orthographic projection of the colloidal plane portion 211 onto the plane where the cover plane portion 221 is located is within the cover plane portion 221.

[0105] In the above implementation, the size of the colloidal planar portion 211 is smaller than the size of the cover planar portion 221, allowing the colloidal curved portion 212 to have more bending space. This avoids excessive compression of the colloidal curved portion 212 by the cover 220 and the display substrate 10, thus preventing excessive deformation. This also makes it easier to adjust the refractive index of the cover curved portion 202.

[0106] For example, the orthographic projection of the first connecting line 213 onto the plane where the cover plane portion 221 is located, and the distance between the projection and the corresponding second connecting line 223 are 0.5 mm. It is readily understood that the above distance can be adjusted according to actual needs, such as 0.4 mm, 0.6 mm, etc., and this application does not limit it in this regard.

[0107] Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present disclosure. Figure 5 The enlarged oval area in the lower left corner shows the assembly relationship between the display substrate 10, the cover plate assembly 20, and the housing 1, for comparison with... Figure 2 and Figure 3 Cross-sectional views from the same perspective.

[0108] Combination Figure 5 In this embodiment, the electronic device is a mobile phone, tablet computer, etc., and the electronic device includes a housing 1 and a display panel 2.

[0109] The housing 1 is a plate-like structure, and the display panel 2 is... Figure 1-4 The display panel 2 shown has a substrate flat portion 101 and a cover plate flat portion 201 of the display substrate 10 stacked sequentially on the surface of the housing 1, and a substrate curved portion 102 and a cover plate curved portion 202 of the display substrate 10 stacked sequentially on the side of the housing 1.

[0110] When using the electronic device provided in this embodiment, the housing 1 supports the display panel 2, and the display panel 2 displays an image. The substrate planar portion 101 and the cover plate planar portion 201 of the display substrate 10 are sequentially stacked on the surface of the housing 1, and the substrate curved portion 102 and the cover plate curved portion 202 of the display substrate 10 are sequentially stacked on the side of the housing 1. In this way, light emitted from the substrate planar portion 101 of the display substrate 10 can be transmitted through the cover plate planar portion 201, and light emitted from the substrate curved portion 102 of the display substrate 10 can be transmitted through the cover plate curved portion 202. Since the ratio between the refractive index of the cover plate curved portion 202 and the refractive index of the cover plate planar portion 201 is within a threshold range, the refractive indices of the light emitted from the substrate curved portion 102 and the substrate planar portion 101 of the display substrate 10 are approximately the same, and there will be no distortion between the images displayed by the substrate curved portion 102 and the substrate planar portion 101 of the display substrate 10, thus ensuring the overall imaging effect of the display panel 2.

[0111] In other words, the display panel 2 provided in this embodiment ensures that the refractive index of the cover plate flat portion 201 and the refractive index of the cover plate curved portion 202 are approximately the same, thereby ensuring the overall imaging effect of the display panel 2.

[0112] Figure 6 A flowchart illustrating a method for manufacturing a display panel according to an embodiment of this disclosure, the method being applicable to... Figure 1-4 The display panel shown.

[0113] Step 601: Fabricate the flat portion 201 and the curved portion 202 of the cover plate, wherein the refractive index of the curved portion 202 is different from that of the flat portion 201.

[0114] Step 602: Fit the flat portion 201 and the curved portion 202 of the cover plate to the display substrate 10.

[0115] Optionally, in step 601, firstly, a simulation model of the display panel is established; then, based on the simulation model, the refractive index of the cover plate flat portion 201 and the cover plate curved portion 202 is determined; then, based on the refractive index of the cover plate flat portion 201 and the cover plate curved portion 202, the cover plate flat portion 201 and the cover plate curved portion 202 are fabricated.

[0116] Optionally, the refractive index of the flat portion 201 and the curved portion 202 of the cover plate is determined by the following method: First, the curvature of the curved portion 202 of the cover plate is determined according to the simulation model; then, the refractive index of the curved portion 202 of the cover plate is determined according to the curvature of the curved portion 202 of the cover plate, so that the refractive index of the position with the larger curvature in the curved portion 202 of the cover plate is larger.

[0117] In other words, the refractive index of the curved surface 202 of the cover plate is positively correlated with the curvature of the curved surface 202 of the cover plate. The refractive index of the curved surface 202 of the cover plate increases as the curvature of the curved surface 202 of the cover plate increases, and vice versa.

[0118] By adjusting the local refractive index of the curved part 202 of the cover plate, the refractive index of the curved part 202 of the cover plate can gradually change along a certain direction, thereby eliminating the influence of the thickness change of the curved part 202 of the cover plate on the refractive index.

[0119] In the above implementation, the thickness parameters of the cover plate curved surface 202 can be determined through a simulation model of the display panel. These parameters include the thickness parameters of the colloidal curved surface 212 and the cover plate curved surface 222. The thickness parameters include curvature, maximum thickness, minimum thickness, and thickness change rate. Based on the thickness parameters of the cover plate curved surface 222, the doping ratio at various points on the colloidal curved surface 212 is determined, thereby adjusting the local refractive index of the colloidal curved surface 212 so that the refractive index of the cover plate curved surface 202 can gradually change along a certain direction.

[0120] Optionally, in the process of determining the refractive index of the curved surface 202 of the cover plate according to the curvature of the curved surface 202 of the cover plate, the refractive index of the curved surface 202 of the cover plate is uniformly varied with the curvature until the refractive indices of the curved surface 202 of the cover plate and the flat surface 201 of the cover plate are equal at the position where they are connected to the flat surface 201 of the cover plate.

[0121] In the above implementation, the refractive index of the curved part 202 of the cover plate changes uniformly, which can better compensate for the distortion caused by the curvature of the curved part 202 of the cover plate, resulting in a better overall imaging effect of the display panel.

[0122] Optionally, the colloidal curved surface 212 has a spliced ​​structure, which can achieve a stepped gradient of the colloidal curved surface 212 by splicing together multiple sub-colloidal curved surfaces with different refractive indices.

[0123] Optionally, the colloidal curved surface 212 is a one-piece structure. By adjusting the doping ratio of different parts during the coating and molding process of the colloidal curved surface 212, the gradient of the colloidal curved surface 212 can be achieved.

[0124] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A display panel, characterized by, The display panel comprises a display substrate (10) and a cover plate assembly (20); The display substrate (10) comprises a substrate planar part (101) and a substrate curved part (102), and the substrate curved part (102) is connected with the outer edge of the substrate planar part (101); The cover plate assembly (20) comprises a cover plate planar part (201) and a cover plate curved part (202), the cover plate curved part (202) is connected with the outer edge of the cover plate planar part (201), the cover plate planar part (201) is attached to the substrate planar part (101), the cover plate curved part (202) is attached to the substrate curved part (102), the refractive index of the cover plate curved part (202) is different from the refractive index of the cover plate planar part (201), the refractive index of the cover plate curved part (202) is positively correlated with the curvature of the cover plate curved part (202), the refractive index of the cover plate curved part (202) increases with the increase of the curvature of the cover plate curved part (202), the refractive index of the cover plate curved part (202) decreases with the decrease of the curvature of the cover plate curved part (202), the cover plate curved part (202) comprises a gel curved part (212) and a cover curved part (222) which are sequentially stacked on the display substrate (10), the refractive index of the cover curved part (222) changes with the bending degree of the curved surface, and the refractive index of the gel curved part (212) changes with the bending degree of the curved surface; The cover plate assembly (20) comprises optical gel (210) and face cover (220), the optical gel (210) comprises a gel planar part (211) and a gel curved part (212), the face cover (220) comprises a cover planar part (221) and a cover curved part (222), the normal projection of the gel planar part (211) on the plane where the cover planar part (221) is located is located in the cover planar part (221).

2. The display panel of claim 1, wherein, The refractive index of the cover plate curved part (202) changes uniformly with the curvature until the refractive index of the cover plate curved part (202) is equal to the refractive index of the cover plate planar part (201) at the position connected with the cover plate planar part (201).

3. The display panel of claim 1, wherein, The refractive index of the cover curved part (222) is controlled by setting a coating on the cover curved part (222) and / or controlling the thickness of the cover curved part (222) to change; and / or The refractive index of the gel curved part (212) is controlled by doping the gel curved part (212) and / or controlling the thickness of the gel curved part (212) to change.

4. The display panel of claim 3, wherein, The setting of the coating on the cover curved part (222) comprises: At least one of the following substances is arranged on one side of the cover curved part (222) facing the gel curved part (212): a polymer for increasing the refractive index of the cover curved part (222), a polymer for reducing the refractive index of the cover curved part (222); The doping of the gel curved part (212) comprises: Doping the colloidal curved portion (212) with at least one of the following substances: colloidal particles, high-atomic-number carbon atom polymers.

5. The display panel of claim 1, wherein, The cover curved portion (202) is located at least at any curved side of the display panel.

6. An electronic device, comprising: The display panel (2) comprises: The display panel (2) is the display panel according to any one of claims 1-5.

7. A method for manufacturing a display panel, characterized in that, The manufacturing method is suitable for the display panel according to any one of claims 1-5, and the manufacturing method comprises: The cover flat portion (201) and the cover curved portion (202) are manufactured, the refractive index of the cover curved portion (202) is different from the refractive index of the cover flat portion (201), the refractive index of the cover curved portion (202) is positively correlated with the curvature of the cover curved portion (202), the refractive index of the cover curved portion (202) increases with the increase of the curvature of the cover curved portion (202), the refractive index of the cover curved portion (202) decreases with the decrease of the curvature of the cover curved portion (202), the cover curved portion (202) comprises a colloidal curved portion (212) and a cover curved portion (222) which are sequentially stacked on the display substrate (10), the refractive index of the cover curved portion (222) changes with the curvature of the curved surface, and the refractive index of the colloidal curved portion (212) changes with the curvature of the curved surface, the cover assembly (20) comprises optical glue (210) and a cover (220), the optical glue (210) comprises a colloidal flat portion (211) and a colloidal curved portion (212), the cover (220) comprises a cover flat portion (221) and a cover curved portion (222), the normal projection of the colloidal flat portion (211) on the plane where the cover flat portion (221) is located is located in the cover flat portion (221); The cover flat portion (201) and the cover curved portion (202) are attached to the display substrate (10).

8. The method of manufacturing according to claim 7, wherein, The manufacturing of the cover flat portion (201) and the cover curved portion (202) comprises: An emulation model of the display panel is established; According to the emulation model, the refractive index of the cover flat portion (201) and the cover curved portion (202) is determined; According to the refractive index of the cover flat portion (201) and the cover curved portion (202), the cover flat portion (201) and the cover curved portion (202) are manufactured.

9. The method of manufacturing according to claim 8, wherein, According to the emulation model, the curvature of the cover curved portion (202) is determined; According to the curvature of the cover curved portion (202), the refractive index of the cover curved portion (202) is determined. According to the curvature of the cover curved portion (202), the refractive index of the cover curved portion (202) is determined, which comprises:

10. The method of manufacturing according to claim 9, wherein, The refractive index of the cover curved portion (202) is uniformly changed with the curvature until the refractive index of the cover curved portion (202) is equal to the refractive index of the cover flat portion (201) at the position connected with the cover flat portion (201). ​

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