Display panel and display device

Abstract

Embodiments of the present application disclose a display panel and a display device, which comprise a functional area corresponding to an external camera. The display panel comprises a panel body, a polarizing layer and a back plate module. The polarizing layer is arranged on the light-out side of the panel body. The back plate module is arranged on the side of the panel body away from the polarizing layer. The total in-plane retardation value of the back plate module and the panel body arranged in layers and corresponding to the functional area is less than 200 nanometers or greater than 7000 nanometers. In the present application, the module structure under the polarizing layer is adopted, that is, the total in-plane retardation value of the back plate module and the panel body arranged in layers and corresponding to the functional area is less than 200 nanometers or greater than 7000 nanometers, so as to improve the situation of rainbow stripes appearing on the photo, and thus improve the camera quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel and a display device. BACKGROUND

[0002] The existing organic light-emitting diode (OLED) panel is suitable for under-screen camera, while the LED panel includes a panel body, a polaroid arranged on the panel body, and a backboard structure arranged under the panel body.

[0003] In the research and practice of the prior art, the inventors of the present application found that when the backboard structure adopts a general material, the photo taken by the under-screen camera has obvious rainbow stripes, which reduces the quality of the photo. SUMMARY

[0004] The embodiments of the present application provide a display panel and a display device, which can improve the situation that rainbow stripes appear in the photo when the under-screen camera is used.

[0005] The embodiments of the present application provide a display panel, which includes a functional area and a display area surrounding at least a part of the functional area, and the display panel includes:

[0006] a panel body;

[0007] a polaroid arranged on the light-emitting side of the panel body;

[0008] a backboard module arranged on the side of the panel body away from the polaroid;

[0009] The backboard module and the panel body arranged in layers correspond to a part of the functional area, and have a total in-plane retardation value, which is less than 200 nanometers or greater than 7000 nanometers.

[0010] Optionally, in some embodiments of the present application, the in-plane retardation value of the part of the panel body corresponding to the functional area is greater than or equal to 50 nanometers and less than or equal to 100 nanometers;

[0011] The in-plane retardation value of the part of the backboard module corresponding to the functional area is less than 100 nanometers or greater than 6950 nanometers.

[0012] Optionally, in some embodiments of the present application, the backboard module includes a support layer, a buffer layer, a plurality of adhesive layers, and at least one flexible layer arranged in layers; the buffer layer is located above the support layer, the at least one flexible layer is located above the buffer layer, and the panel body is located above the at least one flexible layer;

[0013] Any two of the support layer, the buffer layer, and the at least one flexible layer are attached to one of the adhesive layers.

[0014] The back plate module is further provided with an opening corresponding to the functional area, the opening penetrating the support layer and the buffer layer.

[0015] Optionally, in some embodiments of the present application, the number of flexible layers is also one layer.

[0016] Optionally, in some embodiments of the present application, the number of flexible layers is also at least two layers, and the adhesive layer and the flexible layer are alternately stacked.

[0017] Optionally, in some embodiments of the present application, the in-plane retardation values of the at least two flexible layers are the same.

[0018] Optionally, in some embodiments of the present application, the orientation directions of any two flexible layers are less than or equal to 15 degrees.

[0019] Optionally, in some embodiments of the present application, the orientation directions of the at least two flexible layers are parallel to each other.

[0020] Optionally, in some embodiments of the present application, the flexible layer includes a first flexible layer and a second flexible layer, the adhesive layer includes a first adhesive layer, a second adhesive layer and a third adhesive layer, the first adhesive layer is arranged between the support layer and the buffer layer, the second adhesive layer is arranged between the buffer layer and the first flexible layer, and the third adhesive layer is arranged between the first flexible layer and the second flexible layer.

[0021] Optionally, in some embodiments of the present application, the material of the flexible layer includes at least one of transparent polyimide, polyethylene terephthalate, cellulose triacetate or ultra-thin glass.

[0022] Correspondingly, the present application also provides a display device, which includes a camera and a display panel as described in any of the above embodiments, the camera is arranged below the display panel and corresponds to the functional area.

[0023] The display panel and the display device of the present application include a functional area corresponding to an external camera, the display panel includes a panel body, a polarizing layer and a back plate module, the polarizing layer is arranged on the light-emitting side of the panel body; the back plate module is arranged on the side of the panel body away from the polarizing layer; the total in-plane retardation value of the part of the back plate module and the panel body corresponding to the functional area is less than 200 nanometers or greater than 7000 nanometers.

[0024] In the module structure of the present application, the total in-plane retardation value of the laminated panel main body and the back plate module corresponding to the functional area is less than 200 nanometers or greater than 7000 nanometers, so as to improve the situation of rainbow stripes appearing on the photo, and further improve the camera quality. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 is a structural schematic diagram of a display panel provided by an embodiment of the present application;

[0027] Figure 2 is a structural schematic diagram of a display panel provided by an embodiment of the present application;

[0028] Figure 3 is a schematic diagram of two film layers being attached;

[0029] Figure 4 is a structural schematic diagram of a display device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower of the device in the actual use or working state, and the specific direction is the direction of the drawing surface in the drawings; and "inner" and "outer" refer to the outline of the device.

[0031] The present application provides a display panel and a display device, which will be described in detail below. It should be noted that the description order of the following embodiments is not limited as the preferred order of the embodiments.

[0032] Please refer to Figure 1The embodiment one of the present application provides a display panel 100, which comprises a functional area sx corresponding to an external camera and a display area AA surrounding at least a part of the functional area sx. The display panel 100 comprises a panel body 11, a polarizing layer 12 and a back plate module 13.

[0033] The polarizing layer 12 is arranged on the light-emitting side of the panel body 11. The back plate module 13 is arranged on the side of the panel body 11 away from the polarizing layer 12.

[0034] The total in-plane retardation value of the part of the back plate module 13 and the panel body 11 corresponding to the functional area sx is less than 200 nanometers or greater than 7000 nanometers.

[0035] In the display panel 100 of the embodiment one of the present application, the module structure under the polarizing layer 12, i.e. the laminated panel body 11 and back plate module 13, has a total in-plane retardation value of less than 200 nanometers or greater than 7000 nanometers corresponding to the functional area sx, so as to improve the situation of rainbow stripes appearing on the photo and improve the camera quality.

[0036] It should be noted that the total in-plane retardation value can be the sum of the in-plane retardation values of each film layer, or can be less than the sum of the in-plane retardation values of each film layer. The final total in-plane retardation value is subject to the measured value of the module composed of the panel body 11 and the back plate module 13.

[0037] Optionally, the polarizing layer 12 can be formed on the panel body 11, or attached to the panel body 11 by a colloid.

[0038] Optionally, the total in-plane retardation value of the module composed of the panel body 11 and the back plate module 13 can be less than 200 nanometers or greater than 7000 nanometers only for the part of the functional area sx, or the total in-plane retardation value of the entire module composed of the panel body 11 and the back plate module 13 can be less than 200 nanometers or greater than 7000 nanometers.

[0039] Optionally, the total in-plane retardation value can be 190 nanometers, 150 nanometers, 100 nanometers, 50 nanometers, 0 nanometer, 7500 nanometers, 8500 nanometers, 9500 nanometers, 10000 nanometers or 15000 nanometers, etc.

[0040] Optionally, the total in-plane retardation value is less than or equal to 150 nanometers, or greater than or equal to 8000 nanometers, such as 150 nanometers, 100 nanometers, 50 nanometers, 20 nanometers, 10 nanometers, 8000 nanometers, 9000 nanometers, 10000 nanometers or 15000 nanometers, etc.

[0041] It should be noted that the in-plane retardation value is related to the production process of the film layer. Generally, the film layer is formed by using a melt casting process, and a non-stretching and non-oriented film layer can be obtained. In this case, the film layer does not have an obvious orientation. If the film layer is subjected to uniaxial or biaxial stretching treatment, the film layer has an orientation direction. In this case, the film layer with the orientation direction has the in-plane retardation value.

[0042] Optionally, the in-plane retardation value of the panel body 11 corresponding to the part of the functional area sx is greater than or equal to 50 nanometers and less than or equal to 100 nanometers; for example, it can be 50 nanometers, 60 nanometers, 70 nanometers, 80 nanometers, 90 nanometers, or 100 nanometers.

[0043] Optionally, the in-plane retardation of the back plate module 13 corresponding to the part of the functional area sx is less than 100 nanometers or greater than 6950 nanometers; for example, it can be 30 nanometers, 50 nanometers, 60 nanometers, 70 nanometers, 80 nanometers, 90 nanometers, 7000 nanometers, 7500 nanometers, 8000 nanometers, 8500 nanometers, 9000 nanometers, or 10000 nanometers.

[0044] In some embodiments, under the premise that the in-plane retardation value of the panel body 11 corresponding to the part of the functional area sx is greater than or equal to 50 nanometers and less than or equal to 100 nanometers, the in-plane retardation of the back plate module 13 corresponding to the part of the functional area sx can be greater than or equal to 100 nanometers.

[0045] Therefore, if the orientation direction of the panel body 11 is different from and greatly different from the orientation direction of the film layer in the back plate module 13, for example, the two directions differ by more than 15 degrees, the actual in-plane retardation value of the entire module can be less than the sum of the in-plane retardation values of the two.

[0046] In the first embodiment, the back plate module 13 includes a support layer 131, a buffer layer 132, a plurality of adhesive layers 133, and at least one flexible layer 134. The buffer layer 132 is located above the support layer 131. The at least one flexible layer 134 is located above the buffer layer 132. The panel body 11 is located above the at least one flexible layer 134.

[0047] Any two of the support layer 131, the buffer layer 132, and the at least one flexible layer 134 are attached to an adhesive layer 133.

[0048] The back plate module 13 is also provided with an opening 13a corresponding to the functional area sx. The opening 13a penetrates the support layer 131 and the buffer layer 132.

[0049] Optionally, the first embodiment takes one layer of the flexible layer 134 as an example.

[0050] Optionally, the flexible layer 134 can be a single-layer film layer structure or can be formed by stacking a plurality of sub-film layers.

[0051] Optionally, the material of the flexible layer 134 comprises at least one of transparent polyimide (CPI), polyethylene terephthalate (PET), tri-acetyl cellulose (TAC) or ultra-thin glass (UTG). Of course, the flexible layer 134 can also be other materials, which are not described here.

[0052] Optionally, the thickness of the flexible layer 134 is between 25 microns and 200 microns, such as can be 25 microns, 50 microns, 100 microns, 150 microns or 200 microns.

[0053] It should be noted that the thickness of the flexible layer 134 can be set according to the actual situation, such as when the bending radius r of the display panel 100 is 3 mm, the film layer is not damaged after bending more than 200,000 times, then the thickness of the flexible layer 134 can be set to be between 25 microns and 100 microns, such as can be 25 microns, 50 microns, 80 microns or 100 microns.

[0054] Optionally, the thickness of the adhesive layer 133 is between 20 microns and 60 microns, such as can be 20 microns, 30 microns, 40 microns, 50 microns or 60 microns.

[0055] Optionally, the adhesive layer 133 on the flexible layer 134 is an optical adhesive layer, which has a higher light transmittance, such as a light transmittance greater than 80%.

[0056] Optionally, all of the adhesive layers 133 can be optical adhesives.

[0057] Optionally, the display panel 100 can also include a cover plate 14 disposed on the polarizing layer 12. Optionally, the in-plane retardation of the cover plate 14 is 0, but is not limited to this.

[0058] Please refer to Figure 2 The display panel 100 of the second embodiment is different from the display panel 100 of the first embodiment in that the number of flexible layers 134 is also at least two. The adhesive layer 133 and the flexible layer 134 are alternately stacked.

[0059] Optionally, the in-plane retardation values of the at least two flexible layers 134 are the same. The same in-plane retardation values of different flexible layers 134 help to reduce the complexity of optical effects and facilitate the improvement of the rainbow problem of the camera.

[0060] In some embodiments, the in-plane retardation values of the at least two flexible layers 134 can also be different. For example, the in-plane retardation value of a certain flexible layer 134 can be 0, and the in-plane retardation value of another flexible layer 134 is greater than 0. When the in-plane retardation value of the flexible layer 134 is 0, the flexible layer 134 has no obvious orientation direction.

[0061] Optionally, the orientation directions of any two flexible layers 134 are less than or equal to 15 degrees different.

[0062] It should be noted that the orientation direction of the flexible layer 134 is the direction in which the flexible layer is stretched. For example, the stretching direction of one flexible layer 134 is parallel to the x-axis of the two-dimensional coordinate system, and the stretching direction of the other flexible layer 134 intersects the x-axis. The angle of the stretching direction of the other flexible layer 134 relative to the x-axis is the degree of difference between the orientation directions of the two flexible layers.

[0063] In addition, when two flexible layers are stacked, if the orientation directions of the two flexible layers are less than or equal to 15 degrees different, the total in-plane retardation value of the two flexible layers is greater than the in-plane retardation value of any one flexible layer.

[0064] Therefore, the orientation directions of any two flexible layers 134 are less than or equal to 15 degrees different, which facilitates the inference of the trend of the total in-plane retardation value, thereby improving the preparation efficiency.

[0065] Optionally, the orientation directions of the at least two flexible layers 134 are parallel to each other. Such a configuration facilitates the improvement of the total in-plane retardation value.

[0066] Optionally, the flexible layer 134 includes a first flexible layer 13b and a second flexible layer 13c. The adhesive layer 133 includes a first adhesive layer 13d, a second adhesive layer 13e, and a third adhesive layer 13f. The first adhesive layer 13d is arranged between the support layer 131 and the buffer layer 132. The second adhesive layer 13e is arranged between the buffer layer 132 and the first flexible layer 13b. The third adhesive layer 13f is arranged between the first flexible layer 13b and the second flexible layer 13c.

[0067] This embodiment two is described by taking two flexible layers 134 and three adhesive layers 133 as an example.

[0068] Optionally, the orientation directions of the first flexible layer 13b and the second flexible layer 13c are parallel to each other. The in-plane retardation values of the first flexible layer 13b and the second flexible layer 13c are the same.

[0069] Optionally, the in-plane retardation value of the adhesive layer 133 is 0.

[0070] In some embodiments, the in-plane retardation values of the first flexible layer 13b and the second flexible layer 13c can also be different. For example, the in-plane retardation value of the first flexible layer 13b is 0 or 5, and the in-plane retardation value of the second flexible layer 13c is 90 nanometers. Optionally, the first flexible layer 13b can be ultra-thin glass.

[0071] When the total in-plane retardation value of the module composed of the panel body 11 and the back plate module 13 is less than 200 nanometers, the first flexible layer 13b and the second flexible layer 13c are both low-retardation-value flexible layers 134. For example, the in-plane retardation values of the first flexible layer 13b and the second flexible layer 13c are both less than 100 nanometers.

[0072] When the total in-plane retardation value of the module composed of the panel body 11 and the back plate module 13 is greater than 7000 nanometers, the first flexible layer 13b and the second flexible layer 13c are both high-retardation-value flexible layers 134. For example, the in-plane retardation values of the first flexible layer 13b and the second flexible layer 13c are both greater than 2000 nanometers.

[0073] Optionally, the materials of the first flexible layer 13b and the second flexible layer 13c respectively include at least one of transparent polyimide (CPI), polyethylene terephthalate (PET), triacetate cellulose (TAC), or ultra-thin glass (UTG). Of course, the two can also be other materials, which will not be described here.

[0074] It should be noted that the film layers of the same material can have different in-plane retardation values after different preparation processes and different film layer settings. For example, the film layer of PET material can be a low in-plane retardation value film layer or a high in-plane retardation value film layer.

[0075] When the first flexible layer 13b and the second flexible layer 13c are bonded, the orientation direction of the second flexible layer 13c and the orientation direction of the first flexible layer 13b are bonded in the same direction, as shown in Figure 3 .

[0076] The first flexible layer 13b has an orientation direction MD1 and a second direction TD1 perpendicular to the orientation direction MD1; the second flexible layer 13c has an orientation direction MD2 and a second direction TD2 perpendicular to the orientation direction MD2. Therefore, when bonded, the orientation direction MD1 of the first flexible layer 13b and the orientation direction MD2 of the second flexible layer 13c are bonded in the same direction; the second direction TD2 of the first flexible layer 13b and the second direction TD2 of the second flexible layer 13c are bonded in the same direction. This bonding method facilitates obtaining a high in-plane phase value of the stacked film layer.

[0077] Please refer to Figure 4 . Correspondingly, the application also provides a display device 1000, which includes a camera 200 and a display panel 100 according to any of the above embodiments. The camera 200 is arranged below the display panel 100 and corresponds to the functional area sx.

[0078] The display panel 100 is described in the above embodiments, which will not be described here.

[0079] The display device 1000 of the embodiment of the present application includes a functional area sx corresponding to the camera 200. The display panel 100 includes a panel body 11, a polarizing layer 12 and a back plate module 13. The polarizing layer 12 is arranged on the light exit side of the panel body 11. The back plate module 13 is arranged on the side of the panel body 11 away from the polarizing layer 12. The total in-plane retardation value of the back plate module 13 and the panel body 11 arranged in a stack corresponding to the part of the functional area sx is less than 200 nanometers or greater than 7000 nanometers.

[0080] In the present application, the module structure under the polarizing layer 12, i.e. the panel body and the back plate module arranged in a stack, is arranged with a total in-plane retardation value corresponding to the functional area sx less than 200 nanometers or greater than 7000 nanometers to improve the situation of rainbow stripes appearing on the photo and thus improve the camera quality.

[0081] The above has described in detail the display panel and the display device provided by the embodiment of the present application. The principle and the implementation mode of the present application have been described by applying specific examples. The above embodiment is only used to help understand the method of the present application and its core idea. Meanwhile, for the person skilled in the art, according to the idea of the present application, the specific implementation mode and the application range will be changed. In conclusion, the content of the present description should not be understood as the limitation of the present application.

Claims

1. A display panel comprising a functional area and a display area surrounding at least a portion of the functional area, characterized in that, The display panel includes: The panel body has an in-plane phase difference value of 50 nanometers and less than or equal to 100 nanometers for the portion of the panel body corresponding to the functional area. A polarizing layer is disposed on the light-emitting side of the panel body; A back panel module, wherein the back panel module is disposed on the side of the panel body away from the polarizing layer; The back panel module and the panel body, which are stacked together, have an in-plane phase difference value corresponding to the functional area, wherein the in-plane phase difference value is less than 200 nanometers or greater than 7000 nanometers.

2. The display panel according to claim 1, characterized in that, The back panel module includes a support layer, a buffer layer, multiple adhesive layers and at least one flexible layer stacked together; the buffer layer is located above the support layer, the at least one flexible layer is located above the buffer layer, and the panel body is located above the at least one flexible layer; An adhesive layer is bonded between any two of the support layer, the buffer layer, and at least one of the flexible layers; The backplate module is also provided with openings corresponding to the functional areas, and the openings penetrate the support layer and the buffer layer.

3. The display panel according to claim 2, characterized in that, The flexible layer is also one layer.

4. The display panel according to claim 2, characterized in that, The number of flexible layers is also at least two, with the adhesive layer and the flexible layer being stacked alternately.

5. The display panel according to claim 4, characterized in that, At least two of the flexible layers have the same in-plane phase difference.

6. The display panel according to claim 4, characterized in that, The orientation directions of any two of the flexible layers differ by less than or equal to 15 degrees.

7. The display panel according to claim 6, characterized in that, The orientation directions of at least two of the flexible layers are parallel to each other.

8. The display panel according to claim 4 or 5, characterized in that, The flexible layer includes a first flexible layer and a second flexible layer, and the adhesive layer includes a first adhesive layer, a second adhesive layer and a third adhesive layer. The first adhesive layer is disposed between the support layer and the buffer layer, the second adhesive layer is disposed between the buffer layer and the first flexible layer, and the third adhesive layer is disposed between the first flexible layer and the second flexible layer.

9. The display panel according to claim 1, characterized in that, The in-plane phase difference of the portion of the backplane module corresponding to the functional area is less than 100 nanometers or greater than 6950 nanometers.

10. A display device, characterized in that, It includes a camera and a display panel as described in claims 1-9, wherein the camera is disposed below the display panel and corresponds to the functional area.

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