Display panel, manufacturing method thereof, and display device

Abstract

This application relates to a display panel and its manufacturing method and display device. The display panel includes: a light-emitting layer comprising a pixel definition layer and a light-emitting element, the pixel definition layer having a first opening, and the light-emitting element disposed in the first opening; a functional layer disposed on the light-emitting side of the light-emitting layer; a light-shielding layer stacked on the side of the functional layer opposite to the light-emitting layer, the light-shielding layer having a second opening, the orthographic projection of the second opening at least partially overlapping the orthographic projection of the first opening along the thickness direction of the display panel; and a color resist layer comprising color resist units disposed in the second opening, the distance between the surface of the color resist unit near the light-emitting layer and the upper surface of the light-emitting layer being greater than the distance between the surface of the light-shielding layer near the light-emitting layer and the upper surface of the light-emitting layer. The display panel provided by the embodiments of this application can increase the light emission angle of the light-emitting element, reduce brightness attenuation at large viewing angles, and improve display effects.

Description

Technical Field

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

[0002] With the development of display technology, existing display panels have gradually achieved certain progress in terms of thinness, narrow bezels, and flexibility. On this basis, some organic light-emitting display panels have adopted a technical solution that uses a color filter substrate to replace the original polarizer structure, thereby reducing the thickness of the display panel and making it easier to bend. In touch display panels that adopt this technical solution, the color filter substrate usually includes a light-shielding material and a filter set in the opening of the light-shielding material. There are also multiple layers of structure such as the touch structure between the color filter substrate and the light-emitting layer. At this time, the size of the opening of the light-shielding material has a corresponding limitation on the light emission angle of the pixel, resulting in a large decrease in the viewing angle brightness of the display panel and a decline in the display effect.

[0003] Therefore, there is an urgent need for a display panel that can improve the brightness attenuation when viewing angles, as well as a corresponding manufacturing method and display device. Summary of the Invention

[0004] This application provides a display panel and its manufacturing method, as well as a display device, wherein the display panel can mitigate the attenuation of viewing angle brightness.

[0005] In a first aspect, an embodiment of this application provides a display panel, comprising: a light-emitting layer, including a pixel definition layer and a light-emitting element, the pixel definition layer having a first opening and the light-emitting element disposed in the first opening; a functional layer disposed on the light-emitting side of the light-emitting layer; a light-shielding layer, stacked on the side of the functional layer opposite to the light-emitting layer, the light-shielding layer having a second opening, the orthographic projection of the second opening onto the light-emitting layer along the thickness direction of the display panel at least partially overlapping the first opening; and a color resist layer, including a color resist unit disposed in the second opening, the distance between the surface of the color resist unit near the light-emitting layer and the upper surface of the light-emitting layer being greater than the distance between the surface of the light-shielding layer near the light-emitting layer and the upper surface of the light-emitting layer.

[0006] According to one aspect of the embodiments of this application, the display panel further includes an organic filler layer, the organic filler layer including an organic filler portion disposed between the color resist layer and the functional layer, the functional layer and the organic filler layer being separately disposed and stacked on each other, or the functional layer and the organic filler layer being an integral structure.

[0007] According to one aspect of the embodiments of this application, along the thickness direction, the extension dimension of the organic filler is L1, the extension dimension of the light-shielding layer is L2, and |L1-L2|≤L2×15%.

[0008] According to one aspect of the embodiments of this application, the thickness of the light-shielding layer is 1.3μm to 1.6μm, and the thickness of the organic filler portion is ≥1.5μm.

[0009] According to one aspect of the embodiments of this application, the thickness of the light-shielding layer is less than or equal to the thickness of the organic filler portion.

[0010] According to one aspect of the embodiments of this application, the orthographic projection of the color resist unit on the light-emitting layer is offset from the orthographic projection of the light-shielding layer on the light-emitting layer, and the color resist unit is disposed on the side of the light-shielding layer away from the functional layer.

[0011] According to one aspect of the embodiments of this application, the functional layer includes an encapsulation layer and a touch layer, wherein the touch layer includes at least one inorganic insulating layer and a wiring layer stacked with the inorganic insulating layer.

[0012] According to one aspect of the present application, the display panel further includes a protective layer disposed on the side of the light-shielding layer opposite to the functional layer.

[0013] Secondly, according to embodiments of this application, a method for manufacturing a display panel is provided, comprising:

[0014] S1. A light-emitting layer is provided, the light-emitting layer including a pixel definition layer and a light-emitting element, the pixel definition layer having a first opening, and the light-emitting element being disposed in the first opening;

[0015] S2. Prepare a functional layer on the light-emitting side of the light-emitting layer;

[0016] S3. An organic filling layer is prepared on the side of the functional layer away from the light-emitting layer. The organic filling layer includes a plurality of organic filling portions that protrude in a direction away from the light-emitting layer, and the orthogonal projection of the organic filling portions on the light-emitting layer at least partially overlaps with the first opening.

[0017] S4. Prepare a light-shielding layer on the functional layer. The light-shielding layer is disposed in the same layer as the organic filling part and forms a second opening around the organic filling part. The thickness of the light-shielding layer is less than or equal to the height of the organic filling part.

[0018] According to one aspect of the present application, the step of preparing an organic filling layer on the side of the functional layer away from the light-emitting layer includes: using a halftone mask to process an organic filling layer having a plurality of organic filling portions on the side of the functional layer away from the light-emitting layer, wherein the organic filling portions are provided to protrude in a direction away from the light-emitting layer.

[0019] Thirdly, according to embodiments of this application, a display device is provided, including a display panel of any embodiment of the first aspect.

[0020] In the display panel provided in this application embodiment, the light-shielding layer and the color resist unit are at least partially offset in the thickness direction. By adjusting the thickness of the organic adhesive layer between the functional layer and the light-shielding layer, the light-shielding layer is positioned closer to the light-emitting layer. This allows for an increase in the light-emitting angle of the light-emitting element in the light-emitting layer without changing the size of the opening in the light-shielding layer, thereby reducing the brightness decay of the display panel at large viewing angles and improving the display effect. Attached Figure Description

[0021] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the structure of a display panel provided in one embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the structure of a display panel provided in another embodiment of this application;

[0024] Figure 3 This is a schematic diagram of the structure of a display panel provided in another embodiment of this application;

[0025] Figure 4 This is a schematic diagram of the structure of a display panel provided in another embodiment of this application;

[0026] Figure 5 This is a schematic diagram of the structure of a display panel provided in another embodiment of this application;

[0027] Figure 6 This is a flowchart of a panel manufacturing method provided in one embodiment of this application;

[0028] Figure 7 This is a schematic diagram of the structure of a display device provided in one embodiment of this application.

[0029] in:

[0030] 100 - Display panel; 200 - Display device;

[0031] 10 - Emitting layer; 20 - Functional layer; 30 - Light-shielding layer; 40 - Organic filler layer; 50 - Color resist layer; 60 - Encapsulation layer; 70 - Touch layer; 80 - Protective layer;

[0032] 11-Pixel definition layer; 12-Light-emitting element; 31-Second opening; 41-Organic filling part; 51-Color resist unit; 71-Inorganic insulating layer; 72-Tracking layer;

[0033] 111 - First opening;

[0034] X - Thickness direction.

[0035] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0036] The features and exemplary embodiments of various aspects of this application will now be described in detail. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this application and are not configured to limit this application. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples of this application.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0038] It should be understood that when describing the structure of a component, when referring to a layer or region as being "above" or "on top of" another layer or region, it can mean that it is directly above the other layer or region, or that it contains other layers or regions between it and the other layer or region. Furthermore, if the component is flipped over, that layer or region will be located "below" or "under" the other layer or region.

[0039] The features and exemplary embodiments of various aspects of this application will now be described in detail. Furthermore, the features, structures, or characteristics described below may be combined in any suitable manner in one or more embodiments.

[0040] With the development of display technology, the display effect of existing display panels has gradually improved. At the same time, customers' requirements for display panels in all aspects have also gradually increased. In order to make display panels thinner and more flexible, a technology that uses a combination of black matrix and color filter to replace the original polarizer has emerged in the market. Based on this, some display panels that use the aforementioned technology have adopted COE (Color-filter On Encapsulation) technology, which forms a color filter substrate composed of black matrix and color filter on the encapsulation layer of the display panel.

[0041] Based on this, the inventors discovered that most existing mobile display devices need to have touch functionality to achieve convenient and quick human-computer interaction. In display panels with touch functionality, the touch function layer is usually located between the light-emitting layer and the color filter substrate. However, the electrodes required for the touch function layer to achieve touch functionality need to be spaced apart, making it difficult to reduce its thickness. This results in a large gap between the color filter substrate and the light-emitting layer. Due to the limitation of the black matrix openings in the color filter substrate, the viewing angle brightness of the display panel is greatly reduced, resulting in poor display effect.

[0042] To address the aforementioned issues, this application proposes a display panel and its manufacturing method. The display panel comprises a light-shielding layer and a functional layer stacked together. By reducing the thickness of the organic layer, the distance in the thickness direction between the opening of the black matrix and the pixel opening in the color filter substrate is reduced. This expands the light emission angle of the light-emitting element while keeping the size of the black matrix opening constant, slows down the attenuation of viewing angle brightness, and improves the display effect of the display panel.

[0043] It is understood that the following embodiments of this application are only described using the functional layer as a touch layer as an example, but this application is not limited to this and can also be applied to other display panels with an organic layer disposed under the color filter substrate, and to protect it.

[0044] To better understand this application, the following will be combined with... Figures 1 to 7 The manufacturing method of the display module, the display module, and the display device provided in the embodiments of this application will be described in detail.

[0045] Please refer to the following: Figures 1 to 3 , Figure 1 This is a schematic diagram of the structure of a display panel provided in one embodiment of this application. Figure 2 This is a schematic diagram of the structure of a display panel provided in another embodiment of this application. Figure 3 This is a schematic diagram of the structure of a display panel provided in another embodiment of this application.

[0046] In a first aspect, according to an embodiment of this application, a display panel 100 is provided, including a light-emitting layer 10, a functional layer 20, a light-shielding layer 30, and a color resist layer 50. The light-emitting layer 10 includes a pixel definition layer 11 and a light-emitting element 12. The pixel definition layer 11 has a first opening 111, and the light-emitting element 12 is disposed in the first opening 111. The functional layer 20 is disposed on the light-emitting side of the light-emitting layer 10. The light-shielding layer 30 is stacked on the side of the functional layer 20 away from the light-emitting layer 10. The light-shielding layer 30 has a second opening 31. Along the thickness direction X of the display panel, the orthographic projection of the second opening 31 on the light-emitting layer 10 at least partially overlaps with the first opening 111. The color resist layer 50 includes a color resist unit 51, which is disposed in the second opening 31. The distance between the surface of the color resist unit 51 near the light-emitting layer 10 and the upper surface of the light-emitting layer 10 is greater than the distance between the surface of the light-shielding layer 30 near the light-emitting layer 10 and the upper surface of the light-emitting layer 10.

[0047] This application provides a display panel 100, which firstly includes a light-emitting layer 10, a functional layer 20, and a light-shielding layer 30 stacked sequentially. The light-emitting layer 10 includes a pixel definition layer 11, in which a plurality of first openings 111 are formed. A plurality of light-emitting elements 12 are respectively disposed in these openings 111. These light-emitting elements 12 emit light through the first openings 111 to the same side of the light-emitting layer 11 to form a display image. Specifically, the light-emitting elements 12 can be light-emitting elements that emit light of multiple different colors, or light of the desired color can be generated by combining light-emitting elements of the same color with filter units of multiple different colors. In addition, the first openings 111 in the pixel definition layer 11 can be arranged in an array, or other arrangements that facilitate pixel sharing can be used. This application does not impose any specific limitations on these arrangements.

[0048] The functional layer 20 may include a multi-layer structure, including an encapsulation layer 60 for encapsulating the light-emitting layer 10 and a touch electrode layer for implementing touch functionality. The functional layer 20 covers the side of the light-emitting layer 10 from which light is emitted. The light-shielding layer 30 covering one side of the functional layer 20 may be composed of a black matrix. The light-shielding layer 30 can be used to block components such as circuit traces below that may affect the display. Therefore, the light-shielding layer 30 has multiple second openings 31 that correspond one-to-one with the first opening 111. The light emitted by the light-emitting element 12 in the first opening 111 passes through the first opening 111 and the second openings 31 in sequence and forms a display image on the light-emitting side.

[0049] The display panel 100 provided in this embodiment further includes an organic filler layer 40, which in turn includes a plurality of organic filler portions 41. These organic filler portions 41 can be independently and spaced apart, disposed in the same layer as the light-shielding layer 30 and filling the second opening 31; or, these organic filler portions 41 can be formed by an organic layer that is disposed on an entire surface and protrudes in the same direction. When there is an organic layer that is disposed on an entire surface and connects a plurality of organic filler portions 41 together, the organic layer is disposed on the side of the functional layer 20 away from the light-emitting layer 10, that is, between the functional layer 20 and the light-shielding layer 30. In this case, the organic filler portions 41 protrude in the direction of the light-shielding layer 30 and extend into the second opening 31 one by one. These organic filler portions 41 that are respectively filled in the plurality of second openings 31 can provide a certain degree of support and planarization, that is, the organic filler portions 41 can be disposed in the same layer as the light-shielding layer 30, and the extension dimensions of the light-shielding layer 30 and the organic filler portions 41 are the same or similar in the thickness direction X.

[0050] On the surface of the light-shielding layer 30 facing away from the functional layer 20, a color resist layer 50 is also provided. The color resist layer 50 includes a plurality of spaced color resist units 51, each of which is corresponding to one of the second openings 31. That is, along the thickness direction X, the orthographic projection of the color resist layer 50 on the light-emitting layer 10 covers the orthographic projection of the second opening 31 on the light-emitting layer 10 and the first opening 111. At the same time, the orthographic projection of the second opening 31 on the light-emitting layer 10 at least partially overlaps with the first opening 111, so that the light emitted by the light-emitting unit 12 disposed in the first opening 111 passes through the first opening 111, the second opening 31 and the color resist unit 51 in sequence, and finally obtains light of the preset color and high purity. The color resist unit 51 is disposed in contact with one side surface of the organic filling part 41 and at least partially protrudes from the light-shielding layer 30. The degree of protrusion is positively correlated with the extension dimension of the organic filling part 41 in the thickness direction X.

[0051] The display panel 100 in this embodiment has a display layer 10, a functional layer 20 and a light-shielding layer 30 stacked together. The thickness of the organic layer or adhesive layer between the functional layer 20 and the light-shielding layer 30 in the display panel 100 is reduced until the light-shielding layer 30 is directly disposed on the functional layer 20. This reduces the distance between the light-shielding layer 30 and the light-emitting layer 10 in the thickness direction X without affecting the functional layer 20's performance of the preset function. That is, it reduces the vertical distance between the second opening 31 and the first opening 111. This allows the light-emitting angle of the light-emitting element 12 to be increased while maintaining the size of the second opening 31 and blocking the preset area. This improves the brightness decay of the display panel 100 at a wide viewing angle and optimizes the display effect.

[0052] In some optional embodiments, the display panel 100 further includes an organic filler layer 40, which includes an organic filler portion 41 disposed between the color resist layer 50 and the functional layer 30. The functional layer 20 and the organic filler layer 40 are separately disposed and stacked on top of each other, or the functional layer 20 and the organic filler layer 40 are an integral structure.

[0053] In this embodiment, the functional layer 20 is disposed between the organic filler layer 40 and the light-emitting layer 10. Based on this, different layer structure configurations can be employed depending on the material of the surface of the functional layer 20 closest to the organic filler layer 40 to facilitate processing. For example, in an embodiment where the surface layer of the functional layer 20 is an inorganic layer, the organic filler layer 40 can be layered and stacked with the functional layer 20; in an embodiment where the surface of the functional layer 20 is an organic layer, the organic filler layer 40 can be integrally disposed with the organic layer, making the organic filler layer 40 and the functional layer 20 a single integrated structure.

[0054] In an embodiment where the organic filler layer 40 and the functional layer 20 are an integral structure, the organic filler layer 40 is integrally disposed with the uppermost organic layer of the functional layer 20. That is, the organic filler portion 41 is a plurality of protrusions that protrude from the organic layer in the functional layer 20 in a direction away from the light-emitting layer 10, and each protrusion extends into a second opening 31.

[0055] In some optional embodiments, the extension dimension of the organic filler portion 41 along the thickness direction X is L1, the extension dimension of the light-shielding layer is L2, and |L1-L2|≤L2×15%.

[0056] In this embodiment, the organic filler portion 41 fills the second opening 31 of the light-shielding layer 30. The thickness of the organic filler portion 41 should be the same as or similar to the thickness of the light-shielding layer 30 to make the bottom surface for forming the color resist unit 51 flatter, ensuring that the display panel 100 has good optical performance. Specifically, the difference between the extension dimension L1 of the organic filler portion 41 in the thickness direction X and the extension dimension L2 of the light-shielding layer 30 in the thickness direction X should be less than or equal to 15% of L2. Within this range, the color resist unit 51 can have a relatively flat substrate for forming, ensuring the quality of the processed color resist layer 50, and ultimately ensuring that the display panel 100 has good optical performance.

[0057] In some optional embodiments, the thickness of the light-shielding layer 30 is 1.3 μm to 1.6 μm, and the thickness of the organic filler portion 41 is ≥1.5 μm.

[0058] To ensure the light-shielding effect, the extension dimension of the light-shielding layer 30 in the thickness direction X in this embodiment can be 1.3μm to 1.6μm, and the thickness of the organic filler layer 41 should be greater than or equal to 1.5μm, so that the layer structure is easy to process, and at the same time, while ensuring that the corresponding functions can be performed, the excessively thick layer structure should be avoided from affecting the thickness of the display panel 100.

[0059] In some alternative embodiments, the thickness of the light-shielding layer 30 is less than or equal to the thickness of the organic filler portion 41.

[0060] As mentioned above, the organic filler layer 40 in the embodiments of this application can be disposed separately from or integrally with the functional layer 20. In the embodiments where it is disposed separately, a processing method is typically adopted in which the light-shielding layer 30 is first prepared, and then the organic filler portion 41 is prepared in the second opening 31 of the light-shielding layer 30. In the embodiments where it is integrally with the functional layer 20 and the organic filler layer 40, a processing method can be adopted in which the light-shielding layer 30 is prepared around the organic filler portion 41 and disposed in the same layer as it. The choice between these two preparation methods can be made according to the specific layer structure design.

[0061] Within the aforementioned height difference range, the thickness of the light-shielding layer 30 in this embodiment can be less than or equal to the thickness of the organic filling portion 41, so that the color resist unit 51 and the organic filling portion 41 are stacked, thereby preventing the light-shielding layer 30 from affecting the second opening 31 surrounding the organic filling portion 41.

[0062] In some optional embodiments, along the thickness direction X, the orthographic projection of the color resist unit 51 on the light-emitting layer 10 is offset from the orthographic projection of the light-shielding layer 30 on the light-emitting layer 10, and the color resist unit 51 is disposed on the side of the light-shielding layer 30 away from the functional layer 20.

[0063] In this embodiment, the color resist unit 51 is disposed on the side of the organic filler portion 41 facing away from the light-emitting layer 10, and at least partially protrudes from the light-shielding layer 30. Furthermore, the color resist unit 51 can be completely offset from the light-shielding layer 30 in the thickness direction X, meaning the color resist layer 50 is configured as a layer structure that is independent of and stacked with the light-shielding layer 30. Further, the color resist unit 51 can cover the second opening 31 and simultaneously rest on the surfaces of the light-shielding layer 30 and the organic filler portion 41, facilitating the processing and fabrication of the color resist unit 51 and ensuring that the display panel 100 has a good display effect.

[0064] Please refer to the following: Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of the structure of a display panel provided in another embodiment of this application. Figure 5This is a schematic diagram of the structure of a display panel provided in another embodiment of this application. In some optional embodiments, the functional layer 20 includes an encapsulation layer 60 and a touch layer 70. The touch layer 70 includes at least one inorganic insulating layer 71 and a wiring layer 72 stacked with the inorganic insulating layer 71.

[0065] In this embodiment, the functional layer is disposed on the light-emitting side of the light-emitting layer 10, and the functional layer 20 may include a touch functional layer. On this basis, the functional layer 20 is provided with corresponding touch electrodes, circuit traces and insulating material located between the electrodes. Taking the mutual capacitance structure as an example, the functional layer 20 can be simply divided into two trace layers and at least one insulating layer.

[0066] In an embodiment where the organic filler layer 40 and the functional layer 20 are layered, the functional layer 20 may be provided with a first wiring layer, a first inorganic layer, a second wiring layer, and a second inorganic layer in sequence along the direction from the light-emitting layer 10 to the light-shielding layer 30, and then the organic filler layer 40 and the second inorganic layer are stacked. In an embodiment where the organic filler layer 40 and the functional layer are an integral structure, the functional layer 20 may be provided with a first wiring layer, an inorganic layer, a second wiring layer, and an organic layer in sequence along the direction from the light-emitting layer 10 to the light-shielding layer 30. The organic layer and the organic filler layer 40 are integrally formed, so it can also be regarded as the organic filler layer 40 directly covering the second wiring layer, and an organic filler portion 41 protruding from the side surface away from the second wiring layer.

[0067] It is understood that the touch layer 70 may also include other layer structures, such as a buffer layer, and the number of inorganic layers for insulation and wiring layers is not limited to two. Similarly, the functional layer 20 may also include other layer structures, such as an encapsulation layer and a vapor deposition layer. This application does not impose specific limitations on the aforementioned two aspects, and the selection can be made according to the required functions.

[0068] In some alternative embodiments, the display panel 100 further includes a protective layer 80 disposed on the side of the light-shielding layer 30 opposite to the functional layer 10.

[0069] The display panel 100 provided in this embodiment may further include a protective layer 80. The protective layer 80 is disposed on the side of the light-shielding layer 30 and the color resist layer 50 facing away from the light-emitting layer 10, covering the plurality of color resist units 51 in the color resist layer 50 and the light-shielding layer 30 exposed between adjacent color resist units 51. It provides protection for the aforementioned two layer structures, reducing damage to the display panel 100 caused by water and oxygen intrusion, thereby improving the reliability of the display panel 100. Simultaneously, the color resist layer 50 in the display panel 100 protrudes from the light-shielding layer 30, and the color resist layer 50 includes a plurality of spaced-apart color resist units 51. Therefore, its upper surface is not flat. By providing the protective layer 80, the aforementioned layer structures can be covered and a flat surface can be formed, facilitating subsequent connection with other components such as a cover plate. The protective layer 80 can be an organic protective layer or other materials that achieve the same function.

[0070] Please see Figure 6 , Figure 6 This is a flowchart of a panel manufacturing method according to one embodiment of this application. Secondly, according to an embodiment of this application, a method for manufacturing a display surface 100 is provided, comprising:

[0071] S1. A light-emitting layer 10 is provided. The light-emitting layer 10 includes a pixel definition layer 11 and a light-emitting element 12. The pixel definition layer 11 has a first opening 111 and the light-emitting element 12 is disposed in the first opening 111.

[0072] S2. A functional layer 20 is prepared on the light-emitting side of the light-emitting layer 10;

[0073] S3. An organic filling layer 40 is prepared on the side of the functional layer 20 away from the light-emitting layer 10. The organic filling layer 40 includes a plurality of organic filling portions 41 that protrude in a direction away from the light-emitting layer 10, and the orthogonal projection of the organic filling portions 41 on the light-emitting layer 10 at least partially overlaps with the first opening 111.

[0074] S4. A light-shielding layer 30 is prepared on the functional layer 20. The light-shielding layer 30 is disposed in the same layer as the organic filling part 41 and forms a second opening 31 around the organic filling part 41. The thickness of the light-shielding layer 30 is less than or equal to the height of the organic filling part 41.

[0075] This application also provides a method for processing a display panel 100, including steps S1 to S4. In step S1, the light-emitting layer 10 can be disposed on a substrate or a base plate, and the light-emitting element 12 therein can be an inorganic light-emitting element or an organic light-emitting element electrically connected to a corresponding electrode. This application does not impose any specific limitations on this.

[0076] In step S2, a functional layer 20 is prepared on the light-emitting side surface of the light-emitting layer 10. In an embodiment where the functional layer 20 includes a touch layer 70, step S2 may include sequentially preparing a wiring layer 72 and an inorganic insulating layer 71 between the wiring layers 72. The layer structure furthest from the light-emitting layer 10 may be an inorganic insulating layer 71 or an organic layer integrally formed with the organic filling layer 40. Different processing methods may be selected according to the materials required for the layer structure.

[0077] In step S3, an organic layer is formed on the side of the functional layer 20 away from the light-emitting layer 10 and an organic filling layer 40 is patterned. The organic filling layer 40 can be patterned into a plurality of spaced organic filling portions 41, or it can be a connection layer with a small thickness left between adjacent organic filling portions 41, that is, a part of the organic layer is retained on the entire surface.

[0078] In step S4, the light-shielding layer 30 is prepared on the side surface of the functional layer 20 or the organic filling layer 40 away from the light-emitting layer 10, and is disposed in the same layer as the organic filling portion 41. The light-shielding layer 30 has a plurality of second openings 31 around the organic filling portion 41, so that the organic filling portion 41 is exposed from the second openings 31, and the thickness of the light-shielding layer 30 can be kept less than or equal to that of the organic filling portion 41, so as to avoid affecting the size and position of the second openings 31.

[0079] In some alternative embodiments, the step of preparing an organic filler layer 40 on the side of the functional layer 20 away from the light-emitting layer 10 includes: using a halftone mask to process an organic filler layer 40 having a plurality of organic filler portions 41 on the side of the functional layer 20 away from the light-emitting layer 10, wherein the organic filler portions 41 are provided to protrude in a direction away from the light-emitting layer 10.

[0080] In step S3 of the processing method provided in this application embodiment, an organic filling layer 40 is formed using a photomask on the side of the functional layer 20 facing away from the light-emitting layer 10. During this process, HTM (half-tone mask) technology can be used to simultaneously form layer structures of different thicknesses in the same step, thereby simplifying the process. Specifically, HTM photolithography is used, with partial light transmission at the location where the organic filling portion 41 needs to be formed. This allows for the simultaneous formation of both the thinner organic layer in the functional layer 20 and the thicker organic layer with the organic filling portion 41, thereby reducing the number of photomasks used, lowering manufacturing costs, and improving production efficiency.

[0081] Please see Figure 7 , Figure 7 This is a schematic diagram of the structure of a display device provided in one embodiment of this application. In a third aspect, according to an embodiment of this application, a display device 200 is provided, including the display panel 100 of any embodiment in the first aspect.

[0082] This application also provides a display device 200, including the aforementioned display panel 100. The display device 200 can be any product or component with display functionality, such as a mobile phone, tablet computer, digital photo frame, or electronic paper. The display device 200 provided in this application embodiment has all the beneficial effects of the display panel 100 provided in this application embodiment. For details, please refer to the specific descriptions of the display panel 100 in the above embodiments; these descriptions will not be repeated here.

[0083] It is understood that the above description and details are merely exemplary and explanatory, and do not constitute a limitation on this application. Those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Thus, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A display panel, characterized by, include: The light-emitting layer includes a pixel definition layer and a light-emitting element, wherein the pixel definition layer has a first opening and the light-emitting element is disposed in the first opening; A functional layer is disposed on the light-emitting side of the light-emitting layer; A light-shielding layer is stacked on the side of the functional layer opposite to the light-emitting layer. The light-shielding layer has a second opening along the thickness direction of the display panel. The orthographic projection of the second opening on the light-emitting layer at least partially overlaps with the first opening. A color resist layer includes a color resist unit disposed in the second opening, wherein the distance between the side surface of the color resist unit near the light-emitting layer and the upper surface of the light-emitting layer is greater than the distance between the side surface of the light-shielding layer near the light-emitting layer and the upper surface of the light-emitting layer; The display panel further includes an organic filler layer, which includes an organic filler portion disposed between the color resist layer and the functional layer. The functional layer and the organic filler layer are separately disposed and stacked on top of each other, or the functional layer and the organic filler layer are an integral structure.

2. The display panel of claim 1, wherein, Along the thickness direction, the extension dimension of the organic filler is L1, the extension dimension of the light-shielding layer is L2, and |L1-L2|≤L2×15%.

3. The display panel of claim 2, wherein, The thickness of the light-shielding layer is 1.3μm to 1.6μm, and the thickness of the organic filler portion is ≥1.5μm.

4. The display panel of claim 3, wherein, The thickness of the light-shielding layer is less than or equal to the thickness of the organic filler portion.

5. The display panel of claim 1, wherein, The orthographic projection of the color resist unit on the light-emitting layer is offset from the orthographic projection of the light-shielding layer on the light-emitting layer, and the color resist unit is disposed on the side of the light-shielding layer away from the functional layer.

6. The display panel of claim 1, wherein, The functional layer includes an encapsulation layer and a touch layer. The touch layer includes at least one inorganic insulating layer and a wiring layer stacked with the inorganic insulating layer.

7. The display panel of claim 1, wherein, The display panel further includes a protective layer disposed on the side of the light-shielding layer opposite to the functional layer.

8. A manufacturing method of a display panel, characterized by, include: A light-emitting layer is provided, the light-emitting layer including a pixel definition layer and a light-emitting element, the pixel definition layer having a first opening, and the light-emitting element being disposed in the first opening; A functional layer is fabricated on the light-emitting side of the light-emitting layer; An organic filling layer is prepared on the side of the functional layer away from the light-emitting layer. The organic filling layer includes a plurality of organic filling portions that protrude in a direction away from the light-emitting layer, and the orthogonal projection of the organic filling portions on the light-emitting layer at least partially overlaps with the first opening. A light-shielding layer is prepared on the functional layer. The light-shielding layer is disposed in the same layer as the organic filling part and forms a second opening around the organic filling part. The thickness of the light-shielding layer is less than or equal to the height of the organic filling part.

9. The method for manufacturing a display panel according to claim 8, characterized in that, The step of preparing an organic filling layer on the side of the functional layer opposite to the light-emitting layer includes: A functional layer and an organic filler layer with an integrated structure are formed by using a halftone mask. The organic filler portion protrudes from the functional layer in a direction away from the light-emitting layer.

10. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 7.

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