Display panel and display device
By introducing a refractive layer with birefringence characteristics into the bendable area of the folding screen, the light is split to reduce the brightness in the bending state, solving the problem of excessive brightness in the bending display area, achieving brightness uniformity and user experience promote.
Patent Information
- Application Number
- CN202411228495.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2024-12-24
AI Technical Summary
The brightness of the curved display area of the folding screen is too high, resulting in uneven display brightness and reducing the user's visual effect experience.
A refractive layer is introduced into the bendable region of the display panel. The refractive layer has birefractive characteristics, splits light when it is in a bent state, reduces the light output in the bend region, and loses the birefractive characteristics when it is in a flattened state, avoiding the decrease in brightness.
This makes the brightness of the display panel more uniform, improves user visual effect experience, reduces the process impact, and improves the feasibility of preparing refractive layer.
Smart Images
Figure CN119183330A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art
[0002] In recent years, foldable screen technology has developed rapidly and has been widely used. Foldable screen technology can fold the screen. Mobile phones and other devices using foldable screen technology have the advantages of saving space and being easy to carry, and the application scenarios are also more extensive. However, during the bending process of the foldable screen, the curved display area of the screen will be too bright compared to the non-curved display area, resulting in uneven display brightness and reducing the user's visual experience. Summary of the invention
[0003] In view of this, the present application provides a display panel and a display device to solve the above problems.
[0004] In a first aspect, the present application provides a display panel, including a bendable area, wherein the bendable area includes:
[0005] a plurality of light emitting devices;
[0006] A refractive layer, the refractive layer is located on a side of the light emitting device facing the light emitting surface of the display panel; the refractive layer includes a first state and a second state, the refractive layer does not have a birefringence property in the first state, and has a birefringence property in the second state;
[0007] When the bendable area is in a flattened state, the refractive layer in the bendable area is in a first state; when the bendable area is in a bent state, the refractive layer in the bendable area is in a second state.
[0008] In a second aspect, an embodiment of the present application provides a display device, comprising a display panel provided in the first aspect.
[0009] In the embodiment of the present application, a refractive layer is provided in the bendable area of the display panel, and when the bendable area is in a bent state, the refractive layer is in a second state, that is, the refractive layer at this time has a birefringent property, which is conducive to using the refractive layer to split the light refracted to the bendable area when the bendable area is bent, on the one hand, the light intensity refracted from other areas to the bendable area is reduced, and on the other hand, the light output of the bendable area per unit time is reduced, thereby reducing the brightness of the bendable area when it is in a bent state, improving the high brightness of the bendable area, and making the display brightness of the display panel more uniform. When the bendable area is in a flattened state, the refractive layer switches to the first state, that is, the refractive layer at this time does not have a birefringent property, which is conducive to normal light output brightness of the bendable area when it is in a flattened state, and is conducive to avoiding the situation where the brightness of the bendable area is lower than that of other areas due to the refractive layer. In addition, the technical solution of the present application sets the refractive layer on the side of the light-emitting device facing the light-emitting surface of the display panel, which is conducive to avoiding the influence of the refractive layer on the connection between the light-emitting device and other components in the display panel when the light-emitting device is located on the side away from the light-emitting surface of the display panel, which is conducive to reducing the impact on the process of the display panel and improving the feasibility and convenience of preparing the refractive layer. Moreover, it is conducive to at least partially splitting the light emitted by the light-emitting device at the bendable area, thereby reducing the amount of light emitted by the bendable area when it is in a bent state, improving the high brightness of the bendable area, making the display brightness of the display panel more uniform, and improving the user's visual experience. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0011] Figure 1 A schematic diagram of a display panel in a related technology provided by an embodiment of the present application;
[0012] Figure 2 A schematic plan view of a display panel provided in an embodiment of the present application;
[0013] Figure 3 A method provided in the embodiment of the present application Figure 2 Schematic diagram of the cross section along the P-P' direction;
[0014] Figure 4 Another embodiment of the present application provides a Figure 2 Schematic diagram of the cross section along the P-P' direction;
[0015] Figure 5 Another embodiment of the present application provides a Figure 2Schematic diagram of the cross section along the P-P' direction;
[0016] Figure 6 Another embodiment of the present application provides a Figure 2 Schematic diagram of the cross section along the P-P' direction;
[0017] Figure 7 Another embodiment of the present application provides a Figure 2 Schematic diagram of the cross section along the P-P' direction;
[0018] Figure 8 Another embodiment of the present application provides a Figure 2 Schematic diagram of the cross section along the P-P' direction;
[0019] Fig. 9 Another embodiment of the present application provides a Figure 2 Schematic diagram of the cross section along the P-P' direction;
[0020] Fig.10 Another embodiment of the present application provides a Figure 2 Schematic diagram of the cross section along the P-P' direction;
[0021] Fig.11 A schematic diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION
[0022] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.
[0023] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0024] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "an", "the" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.
[0025] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.
[0026] In the description of this specification, it is necessary to understand that the words such as "substantially", "approximately", "approximately", "about", "roughly", "substantially" and the like described in the claims and embodiments of the present application refer to what can be generally recognized within a reasonable process operation range or tolerance range, rather than an exact value.
[0027] It should be understood that although the terms first, second, etc. may be used to describe states, organic insulating layers, inorganic insulating layers, etc. in the embodiments of the present application, these should not be limited to these terms. These terms are only used to distinguish states, organic insulating layers, inorganic insulating layers, etc. from each other. For example, without departing from the scope of the embodiments of the present application, the first state may also be referred to as the second state, and similarly, the second state may also be referred to as the first state. The applicant of this case has provided a solution to the problems existing in the prior art through careful and in-depth research.
[0028] Figure 1 A schematic diagram of a display panel in a related technology provided in an embodiment of the present application, Figure 2 A schematic plan view of a display panel provided in an embodiment of the present application, Figure 3 A method provided in the embodiment of the present application Figure 2 Schematic diagram of the cross section along the P-P' direction.
[0029] The present application embodiment provides a display panel 100, Figure 2 , Figure 3 As shown, the display panel 100 includes a bendable area A00, which includes a plurality of light-emitting devices 10. The bendable area A00 can emit light for display. The display panel 100 also includes a substrate S1, and the film layer where the light-emitting devices 10 are located is located on one side of the substrate S1.
[0030] At present, if Figure 1 As shown, when the non-bending display areas W2 on both sides of the curved display area W1 are in use, part of the light emitted from the non-bending display areas W2 on both sides of the curved display area W1 will be refracted to the curved display area W1. And due to the bending deformation, the light in and around the curved display area W1 will be concentrated and emitted directly above the curved display area W1, making the light emitted from the curved display area W1 greater than that from the non-bending display area W2, so that the brightness of the curved display area W1 of the folding screen is higher than that of the non-bending display area W2, resulting in uneven display brightness when the folding screen is used, which reduces the user experience.
[0031] The bendable area A00 proposed in the present application also includes a refractive layer 20, which is located on the side of the light emitting surface of the light emitting device 10 facing the display panel 100. The refractive layer A20 includes a birefringent material, for example, commonly used birefringent materials include polyimide, polyester, polyvinyl alcohol and certain liquid crystal polymers. These materials can be formed into a film with birefringent properties through special processing techniques, such as stretching, heat treatment or chemical plating. The refractive layer A20 has a birefringent property. This is because the molecules inside the refractive layer A20 are arranged in an orderly manner. This ordered structure is different from the random distribution of ordinary materials. The molecular arrangement inside the refractive layer A20 causes the speed difference of light when it propagates in two different directions. When light enters the refractive layer A20, it splits into two beams of light with different polarization directions, usually called ordinary light (also called o light) and extraordinary light (also called e light). Generally speaking, when light enters the refractive layer A20, the refraction path of the ordinary light formed by the splitting of the light is similar to the refraction path of the light without splitting, while the refraction path of the extraordinary light is quite different from the refraction path of the light without splitting. For example, there is a situation where the refraction path of the extraordinary light is orthogonal to the refraction path of the ordinary light.
[0032] The refractive layer A20 has good light transmittance, which is beneficial to ensure that the light emitting device 10 emits light toward the light emitting surface of the display panel 100.
[0033] The refractive layer 20 is located in the bendable area A100 of the display panel 100. The refractive layer 20 includes a first state 20A and a second state 20B. The refractive layer 20 does not have a birefringence property in the first state 20A, and has a birefringence property in the second state 20B. When the bendable area A100 is in a flat state, the refractive layer 20 in the bendable area A100 is in the first state 20A. When the bendable area A100 is in a bent state, the refractive layer 20 in the bendable area A100 is in the second state 20B.
[0034] Birefringent film can adopt polymer films with different stretching directions for different panel folding forms. For example, a screen that folds left and right can use birefringent materials that shrink left and right. The birefringent film will produce birefringent properties during the stretching or shrinking process. Therefore, when the bendable area A00 is in a flattened state, the refractive layer 20 may appear isotropic or have a slight natural birefringence. At this time, the refractive layer 20 is in the first state 20A, and has no obvious light splitting effect on the light incident on the refractive layer 20. However, when the bendable area A00 is in a bent state, there is mechanical stress inside the refractive layer 20. During the stretching or shrinking process inside the refractive layer 20, this stress will cause the molecular structure inside the refractive layer 20 to change non-uniformly. The molecular arrangement in the local area of the refractive layer 20 will be forced to redirect, thereby generating different refractive indices in different directions, so that the originally isotropic material exhibits birefringent properties. In the relevant technology, this birefringent property caused by mechanical stress is also called stress-induced birefringence.
[0035] It should be noted that in the technical solution of the present application, the bendable area A00 in the display panel 100 may be a partial area of the display panel 100, or the bendable area A00 may be the entire area of the display panel 100, such as the display panel 100 is a rollable panel.
[0036] In the embodiment of the present application, a refractive layer 20 is included in the bendable area A00 of the display panel 100, and when the bendable area A00 is in a bent state, the refractive layer 20 is in a second state 20B, that is, the refractive layer 20 at this time has a birefringence characteristic, which is beneficial for using the refractive layer 20 to split the light refracted to the bendable area A00 when the bendable area A00 is bent. On the one hand, the intensity of light refracted from other areas to the bendable area A00 is reduced, and on the other hand, the amount of light emitted from the bendable area A00 per unit time is reduced, thereby reducing the brightness of the bendable area A00 when it is in a bent state, improving the high brightness of the bendable area A00, and making the display brightness of the display panel 100 more uniform. When the bendable area A00 is in the flattened state, the refractive layer 20 switches to the first state 20A, that is, the refractive layer 20 at this time does not have the birefringence characteristic, which is beneficial to ensure that the light output brightness of the bendable area A00 is normal when in the flattened state, and is beneficial to avoid the situation where the brightness of the bendable area A00 is lower than that of other areas due to the refractive layer 20.
[0037] In addition, the technical solution of the present application sets the refractive layer 20 on the side of the light emitting device 10 facing the light emitting surface of the display panel 100, which is conducive to avoiding the refractive layer 20 from affecting the connection between the light emitting device 10 and other components in the display panel 100 when the light emitting device 10 is located on the side away from the light emitting surface of the display panel 100, which is conducive to reducing the impact on the process of the display panel 100 and improving the feasibility and convenience of preparing the refractive layer 20. Moreover, it is conducive to at least partially splitting the light emitted by the light emitting device 10 at the bendable area A00, thereby reducing the light emission of the bendable area A00 when it is in a bent state, improving the high brightness of the bendable area A00, making the display brightness of the display panel 100 more uniform, and improving the user's visual experience.
[0038] Figure 4 Another embodiment of the present application provides a Figure 2 Schematic diagram of the cross section along the P-P' direction.
[0039] In one embodiment of the present application, Figure 2 , Figure 4 As shown, the display panel 100 further includes at least two non-bending regions B00, and the bendable region A00 is located between the two non-bending regions A00. The non-bending region B00 includes a plurality of light-emitting devices 10, and optionally, the light-emitting devices 10 located in the non-bending region B00 are of the same type as the light-emitting devices 10 located in the bendable region A00.
[0040] The non-bending area B00 also includes a refractive layer 20, and the refractive layer 20 in the bendable area B00 and the refractive layer 20 in the non-bending area A00 are an integral structure. Optionally, the refractive layer 20 in the display panel 100 is laid on the entire surface, so that the bendable area A00 and the non-bending area B00 both include the refractive layer 20. Optionally, the material and structure of the refractive layer 20 in the non-bending area B00 are the same as the material and structure of the refractive layer 20 in the bendable area B00.
[0041] The characteristics and related performances of the refractive layer 20 proposed in the present application can be known from the above embodiments, and will not be described in detail herein.
[0042] When the bendable area A00 is in the flattened state and the bent state, the refractive layer 20 in the non-bending area B00 is in the first state 20A. When the bendable area A00 of the display panel 100 is in the bent state, the non-bending area B00 is always in the flattened state, and part of the refractive layer 20 in the non-bending area B00 is always in the first state 20A, and always exhibits no birefringence characteristics.
[0043] In the embodiment of the present application, the refractive layer 20 in the bendable area B00 and the refractive layer 20 in the non-bending area A00 are provided as an integral structure, which is beneficial to reducing the difficulty of preparing the refractive layer 20 and improving the structural regularity of the display panel 100. When the bendable area A00 is in a flattened state, it is beneficial to avoid the risk of a difference in display brightness between the bendable area A00 and the non-bending area B00 caused by the refractive layer 20 being prepared only in the bendable area A00.
[0044] Optionally, in some other embodiments, the refractive layer 20 is disposed only in the bendable area A00.
[0045] In one embodiment of the present application, continue to refer to Figure 3 As shown, the thickness of the refractive layer 20 is H; 0<H≤10 μm.
[0046] In the embodiment of the present application, setting the thickness H of the refractive layer 20 within a preset range is conducive to providing reference conditions for the application setting of the refractive layer 20, and improving the availability of preparing the refractive layer 20 in the folding screen display panel 100. In addition, setting the thickness H of the refractive layer 20 within a certain range is conducive to avoiding the refractive layer 20 being too thick to burden the thinness of the structure of the display panel 100, and is conducive to avoiding the situation where the refractive layer 20 is too thick and affects the folding application of the display panel 100.
[0047] Figure 5 Another embodiment of the present application provides a Figure 2 Schematic diagram of the cross section along the P-P' direction.
[0048] In one embodiment of the present application, Figure 2 , Figure 5 As shown, the display panel 100 further includes a cover plate 30, which is located on the side of the light emitting device 10 facing the light emitting surface of the display panel 100. The cover plate 30 in the display panel 100 has the function of protecting the panel, and is usually prepared after most functional films in the display panel 100 are prepared.
[0049] In the embodiment of the present application, the refractive layer 20 is disposed on the side of the cover plate 30 facing the backlight surface of the display panel 100, and the refractive layer 20 is laminated with the cover plate 30, which is conducive to reducing the influence of the refractive layer 20 on the process of the display panel 100, improving the preparation efficiency of the display panel 100 with the refractive layer 20, and thus improving the feasibility of the scheme of disposing the refractive layer 20 when preparing the folding display panel 100. In addition, the cover plate 30 is usually in the film layer on the side of the display panel 100 close to the light-emitting surface of the display panel 100, and the refractive layer 20 is also prepared in the film layer on the side of the light-emitting surface of the display panel 100, which is conducive to making the path of the light refracted from the non-bending area B00 toward the bendable area A00 incident on the bendable area A00 shorter, so that the refractive layer 20 can split the refracted light in time to avoid the light affecting other film layers.
[0050] Figure 6 Another embodiment of the present application provides a Figure 2 Schematic diagram of the cross section along the P-P' direction.
[0051] In one embodiment of the present application, Figure 2 , Figure 6 As shown, the display panel 100 further includes a cover plate 30, which is located on the side of the light emitting device 10 facing the light emitting surface of the display panel 100. The cover plate 30 in the display panel 100 has the function of protecting the panel, and is usually prepared after most functional films in the display panel 100 are prepared, and the cover plate 30 is a thicker film layer in the display panel 100.
[0052] The cover plate 30 includes a first cover plate 301 and a second cover plate 302, and the refractive layer 20 is located between the first cover plate 301 and the second cover plate 302. The first cover plate 301 and the second cover plate 302 are made of the same material. Optionally, the thickness of the first cover plate 301 and the second cover plate 302 are the same.
[0053] In the process of preparing the refractive layer 20 in the display panel 100, the first cover plate 301 may be prepared first on the side of the light emitting device 10 facing the light emitting surface of the display panel 100, then the refractive layer 20 may be prepared, and then the second cover plate 302 may be prepared on the side of the refractive layer 20 facing the light emitting surface of the display panel 100. Optionally, the overall total thickness of the first cover plate 301, the refractive layer 20, and the second cover plate 302 is the same as the thickness of a cover plate 30 prepared in the display panel 100.
[0054] In the embodiment of the present application, the cover plate 30 is divided into a first cover plate 301 and a second cover plate 302 and prepared separately, and the refractive layer 20 is prepared between the first cover plate 301 and the second cover plate 302, which is beneficial to utilize the thick film layer of the cover plate 30 to place the refractive layer 20 in its internal position, which is beneficial to reduce the influence of preparing the refractive layer 20 on the overall thickness of the display panel 100, and is beneficial to ensure the light and thin performance of the display panel 100 on the basis of preparing the refractive layer 20. In addition, the refractive layer 20 has good tensile properties, and its performance is not inferior to that of the cover plate 30. The refractive layer 20 also has a certain hardness and its light absorption is less than that of the cover plate, and has little influence on the light output of the display panel 100. Therefore, preparing the refractive layer 20 between the cover plates 30 is beneficial to enhance the protective effect of the cover plate 30 on the display panel 100, for example, it has a certain improvement in the anti-fall performance of the display panel 100.
[0055] Figure 7 Another embodiment of the present application provides a Figure 2 Schematic diagram of the cross section along the P-P' direction.
[0056] In one embodiment of the present application, Figure 2 , Figure 7 As shown, the display panel 100 further includes a thin film encapsulation layer 40, which is located on the side of the light emitting device 10 facing the light emitting surface of the display panel 100, and the thin film encapsulation layer 40 is adjacent to the light emitting device 10. The thin film encapsulation layer 40 can be used to protect the light emitting device 10 and prevent water, oxygen, pollutants, etc. from damaging the light emitting device 10. The encapsulation thin film layer 40 can also be used for flattening, so that the side of the light emitting device 10 facing the light emitting surface of the display panel 100 is relatively flat, eliminating surface unevenness, and providing a flat substrate for subsequent photolithography or other micro-processing steps, etc., so generally speaking, the film thickness of the thin film encapsulation layer 40 is also relatively thick in the display panel 100.
[0057] The thin film encapsulation layer 40 includes at least one inorganic insulating layer 401 and at least one organic insulating layer 402. Optionally, the inorganic insulating layer 401 in the thin film encapsulation layer 40 may be a chemical vapor deposition film layer. Optionally, the organic insulating layer 402 in the thin film encapsulation layer 40 is an inkjet printing layer.
[0058] In the embodiment of the present application, the refractive layer 20 is disposed between the inorganic insulating layer 401 and the organic insulating layer 402, so that the refractive layer 20 is prepared inside the thin film encapsulation layer 40, which is beneficial to reduce the influence of the refractive layer 20 on the overall thickness of the display panel 100 by utilizing the thick film characteristic of the thin film encapsulation layer 40, and reduce the influence of the refractive layer 20 on the thinness of the display panel 100. In addition, it is beneficial to make the refractive layer 20 adjacent to the inorganic insulating layer 401 inside the thin film encapsulation layer 40 or the refractive layer 20 adjacent to the organic insulating layer 401 inside the thin film encapsulation layer 40, and the chemical vapor deposition technology can be used to prepare the refractive layer 20, which is beneficial to utilize the condition that the refractive layer 20 is adjacent to the inorganic insulating layer 401, and use the chemical vapor deposition technology to sequentially prepare the inorganic insulating layer 401 and the refractive layer 20, which is beneficial to reduce the complexity of the process and improve the scientificity and efficiency of the preparation process. Alternatively, inkjet printing technology can be used when preparing the refractive layer 20, which is beneficial to utilize the condition that the refractive layer 20 is adjacent to the organic insulating layer 402, and use inkjet printing technology to sequentially prepare the organic insulating layer 402 and the refractive layer 20, which is beneficial to reduce the complexity of the process and improve the scientificity and efficiency of the preparation process.
[0059] Figure 8 Another embodiment of the present application provides a Figure 2 Schematic diagram of the cross section along the P-P' direction.
[0060] In one embodiment of the present application, Figure 2 , Figure 8 As shown, the thin film encapsulation layer 40 includes a first organic insulating layer 402A and a second organic insulating layer 402B. The first organic insulating layer 402A and the second organic insulating layer 402B can be prepared using inkjet printing technology, and the refractive layer 20 is arranged between the first organic insulating layer 402A and the second organic insulating layer 402B, which is conducive to reducing the influence of the refractive layer 20 on the film thickness and ensuring the light and thin performance of the display panel 100. It is also conducive to using inkjet printing technology to simultaneously prepare the first organic insulating layer 402A, the second organic insulating layer 402B, and the refractive layer 20, thereby improving the preparation efficiency in the inkjet printing process.
[0061] Fig. 9 Another embodiment of the present application provides a Figure 2 Schematic diagram of the cross section along the P-P' direction.
[0062] In one embodiment of the present application, Figure 2 , Fig. 9As shown, the thin film encapsulation layer 40 further includes a first inorganic insulating layer 401A and a second inorganic insulating layer 401B, and the organic insulating layer 402 is located between the first inorganic insulating layer 401A and the second inorganic insulating layer 401B. The first inorganic insulating layer 401A and the second inorganic insulating layer 401B can be prepared using chemical vapor deposition technology. Since the organic insulating layer 402 is located between the first inorganic insulating layer 401A and the second inorganic insulating layer 401B, it is necessary to switch between chemical vapor deposition technology and inkjet printing technology during the preparation of the first inorganic insulating layer 401A, the organic insulating layer 402, and the second inorganic insulating layer 401B.
[0063] Optionally, the first inorganic insulating layer 401A is located on the side of the organic insulating layer 402 facing the light emitting surface of the display panel. In the embodiment of the present application, the first inorganic insulating layer 401A is located on the side of the organic insulating layer 402 facing the light emitting surface of the display panel as an example for description. In other embodiments, the first inorganic insulating layer 401A may also be located on the side of the organic insulating layer 402 facing the backlight of the display panel.
[0064] In the embodiment of the present application, the refractive layer 20 is also disposed between the first inorganic insulating layer 401A and the organic insulating layer 402, which is conducive to continuing to prepare the refractive layer 20 using the inkjet printing technology after the preparation of the organic insulating layer 402 is completed, or, it is conducive to first using the chemical vapor deposition technology to prepare the refractive layer 20 before preparing the first inorganic insulating layer 401A, which is conducive to using the chemical vapor deposition technology or the inkjet printing technology to prepare the refractive layer 20, thereby improving the applicability of the refractive layer 20, improving the convenience of preparing the refractive layer 20, and improving the preparation efficiency.
[0065] In one embodiment of the present application, the refractive layer 20 is reused as the organic insulating layer 402 in the thin film encapsulation layer 40. The material used to prepare the refractive layer 20 may include an organic insulating material, and the refractive layer 20 also has a certain protective effect. The use of the refractive layer 20 as the organic insulating layer 402 in the thin film encapsulation layer 40 is conducive to saving the complicated process of preparing the refractive layer 20 and the organic insulating layer 402 separately, and is conducive to making the organic insulating layer 402 reused by the refractive layer 20 not only achieve the function of film protection, but also have the function of birefringence, which is conducive to improving the utilization rate of the film. In addition, it is also conducive to avoiding increasing the total film thickness of the display panel 100 and ensuring the light and thin performance of the display panel 100.
[0066] In one embodiment of the present application, the refractive layer 20 is reused as the inorganic insulating layer 401 in the thin film encapsulation layer 40. The material used to prepare the refractive layer 20 may include an inorganic insulating material, and the refractive layer 20 also has a certain protective effect. Using the refractive layer 20 to reuse as the inorganic insulating layer 401 in the thin film encapsulation layer 40 is conducive to saving the complicated process of separately preparing the refractive layer 20 and the inorganic insulating layer 401, and is conducive to making the inorganic insulating layer 402 reused by the refractive layer 20 not only achieve the effect of film protection, but also have the effect of birefringence, which is conducive to improving the utilization rate of the film. In addition, it is also conducive to avoiding increasing the total film thickness of the display panel 100 and ensuring the light and thin performance of the display panel 100.
[0067] Fig.10 Another embodiment of the present application provides a Figure 2 Schematic diagram of the cross section along the P-P' direction.
[0068] In one embodiment of the present application, Fig.10 As shown, along a direction perpendicular to the plane where the display panel 100 is located, the display panel 100 includes at least two refractive layers 20. Optionally, as Fig.10 As shown, a refractive layer 20 may be disposed on the side of the cover plate 30 facing the backlight surface of the display panel 100 , and the refractive layer 201 is adjacent to the cover plate; a refractive layer 20 is also disposed between the inorganic insulating layer 401 and the organic insulating layer 402 in the thin film encapsulation layer 40 .
[0069] In the embodiment of the present application, at least two refraction layers 20 are provided in the display panel 100, which is beneficial to improving the weakening effect of the light refracted into the bendable area A00, thereby reducing the degree of increase in brightness of the bendable area A00 when the bendable area A00 is in a bent state, thereby facilitating improving the uniformity of the luminous brightness of the display panel 100 when the bendable area A00 is in a bent state.
[0070] In some technical solutions, the position of the film layer where the refractive layer 20 is located can be adaptively adjusted, or the number of the refractive layers 20 can be adaptively adjusted according to actual use needs.
[0071] Fig.11 A schematic diagram of a display device provided in an embodiment of the present application.
[0072] The present application embodiment provides a display device 200, such as Fig.11 As shown, the display device 200 includes the display panel 100 provided in the above embodiment. The display device 200 may be a display device that can switch between folding states, such as a foldable mobile phone, a rollable display screen, etc.
[0073] In the display device 200, a refractive layer 20 is included in the bendable area A00 of the display panel 100, and when the bendable area A00 is in a bent state, the refractive layer 20 is in a second state 20B, that is, the refractive layer 20 at this time has a birefringence characteristic, which is beneficial for using the refractive layer 20 to split the light refracted to the bendable area A00 when the bendable area A00 is bent. On the one hand, the intensity of light refracted from other areas to the bendable area A00 is reduced, and on the other hand, the amount of light emitted from the bendable area A00 per unit time is reduced, thereby reducing the brightness of the bendable area A00 when it is in a bent state, improving the high brightness of the bendable area A00, and making the display brightness of the display panel 100 more uniform. When the bendable area A00 is in the flattened state, the refractive layer 20 switches to the first state 20A, that is, the refractive layer 20 at this time does not have the birefringence characteristic, which is conducive to normal light output brightness of the bendable area A00 in the flattened state, and is conducive to avoiding the situation where the brightness of the bendable area A00 is lower than that of other areas due to the refractive layer 20. In addition, the technical solution of the present application sets the refractive layer 20 to be located on the side of the light-emitting device 10 facing the light-emitting surface of the display panel 100, which is conducive to avoiding the refractive layer 20 being located on the side of the light-emitting device 10 away from the light-emitting surface of the display panel 100, affecting the connection between the light-emitting device 10 and other components in the display panel 100, which is conducive to reducing the impact on the process of the display panel 100 and improving the feasibility and convenience of preparing the refractive layer 20. Moreover, it is beneficial to at least partially split the light emitted by the light-emitting device 10 at the bendable area A00, thereby reducing the amount of light emitted by the bendable area A00 when it is in a bent state, improving the high brightness of the bendable area A00, making the display brightness of the display panel 100 more uniform, and enhancing the user's visual experience.
[0074] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.
Claims
1. A display panel, characterized in that: The invention comprises a bendable area, wherein the bendable area comprises: a plurality of light emitting devices; A refractive layer, the refractive layer being located on a side of the light emitting device facing the light emitting surface of the display panel; the refractive layer comprises a first state and a second state, the refractive layer does not have a birefringence property in the first state, and has a birefringence property in the second state; Wherein, when the bendable area is in a flattened state, the refractive layer in the bendable area is in the first state; when the bendable area is in a bent state, the refractive layer in the bendable area is in the second state.
2. The display panel according to claim 1, characterized in that: The display panel further includes at least two non-bending areas, and the bendable area is located between the two non-bending areas; the non-bending area includes: a plurality of light emitting devices; A refractive layer, wherein the refractive layer in the bendable area and the refractive layer in the non-bending area are an integral structure; When the bendable area is in a flattened state and a bent state, the refractive layers in the non-bending area are all in the first state.
3. The display panel according to claim 1, characterized in that: The thickness of the refractive layer is H; 0<H≤10 μm.
4. The display panel according to claim 1, characterized in that: The display panel further comprises a cover plate, and the cover plate is located on a side of the light emitting device facing a light emitting surface of the display panel; Wherein, the refractive layer is located on a side of the cover plate facing the backlight surface of the display panel, and the refractive layer is bonded to the cover plate.
5. The display panel according to claim 1, characterized in that: The display panel further comprises a cover plate, and the cover plate is located on a side of the light emitting device facing a light emitting surface of the display panel; The cover plate includes a first cover plate and a second cover plate, and the refractive layer is located between the first cover plate and the second cover plate.
6. The display panel according to claim 1, characterized in that: The display panel further comprises a thin film encapsulation layer, the thin film encapsulation layer is located on a side of the light emitting device facing a light emitting surface of the display panel, and the thin film encapsulation layer is adjacent to the light emitting device; The thin film encapsulation layer includes at least one inorganic insulating layer and at least one organic insulating layer, and the refractive layer is located between the inorganic insulating layer and the organic insulating layer.
7. The display panel according to claim 6, characterized in that: The thin film encapsulation layer includes a first organic insulating layer and a second organic insulating layer; The refractive layer is located between the first organic insulating layer and the second organic insulating layer.
8. The display panel according to claim 6, characterized in that: The thin film encapsulation layer further comprises a first inorganic insulating layer and a second inorganic insulating layer, and the organic insulating layer is located between the first inorganic insulating layer and the second inorganic insulating layer; Wherein, the refractive layer is also located between the first inorganic insulating layer and the organic insulating layer.
9. The display panel according to claim 6, characterized in that: The refractive layer is reused as the organic insulating layer in the thin film encapsulation layer.
10. The display panel according to claim 6, characterized in that: The refractive layer is reused as the inorganic insulating layer in the thin film encapsulation layer.
11. The display panel according to claim 1, characterized in that: Along a direction perpendicular to the plane where the display panel is located, the display panel includes at least two refractive layers.
12. A display device, characterized in that: Comprising a display panel as described in any one of claims 1-11.