Display panel, display device and manufacturing method of display panel

Abstract

This application discloses a display panel, a display device, and a method for manufacturing the display panel. The display panel includes a substrate, a pixel definition layer, a light-emitting layer, and an optical adjustment layer. The pixel definition layer includes pixel defining portions and pixel openings formed by the pixel defining portions. The pixel openings are used to accommodate light-emitting units of the light-emitting layer, and the pixel defining portions are used to mitigate crosstalk between adjacent light-emitting units. The light-emitting units are used to realize the light-emitting display function of the display panel. The optical adjustment layer includes multiple scattering portions, which are located on the side of the light-emitting unit of at least one pixel opening facing away from the substrate. The multiple scattering portions include scattering particles. The scattering particles in the scattering portions can scatter the light emitted by the light-emitting units. By reasonably setting the position of the scattering portions, the possibility of color shift in the display panel can be reduced, thereby improving the display effect of the display panel.

Description

Technical Field

[0001] This application relates to the field of displays, specifically to a display panel, a display device, and a method for manufacturing the display panel. Background Technology

[0002] Organic light-emitting diodes (OLEDs) and flat panel displays based on light-emitting diodes (LEDs) are widely used in various consumer electronics products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, energy saving, thin body, and wide range of applications, becoming the mainstream of display devices.

[0003] However, the performance of current OLED display products needs improvement, as they are prone to color deviation. Summary of the Invention

[0004] This application provides a display panel, a display device, and a method for manufacturing the display panel, aiming to improve the problem of color deviation in the display panel.

[0005] The first aspect of this application provides a display panel, which includes: a substrate; a pixel definition layer located on one side of the substrate, the pixel definition layer including a pixel defining portion and a pixel opening formed by the pixel defining portion; a light-emitting layer including a plurality of light-emitting units located in the pixel opening; and an optical adjustment layer including a plurality of scattering portions located on the side of the light-emitting unit of at least one pixel opening away from the substrate, the plurality of scattering portions including scattering particles.

[0006] According to an embodiment of the first aspect of this application, the material of the optical adjustment layer includes organic materials.

[0007] According to an embodiment of the first aspect of this application, the material of the optical adjustment layer includes at least one of polyvinylcarbazole, F8BT, and 2-tert-butyl-9,10-bis(2-naphthyl)anthracene.

[0008] According to any of the foregoing embodiments of the first aspect of this application, the scattering portion includes a top surface facing away from the substrate, the top surface being provided to protrude in a direction away from the substrate.

[0009] According to any of the foregoing embodiments of the first aspect of this application, the top surface is part of a sphere.

[0010] According to any of the foregoing embodiments of the first aspect of this application, the maximum distance from the scattering portion to the substrate is less than the maximum distance from the pixel definition layer to the substrate.

[0011] According to any of the foregoing embodiments of the first aspect of this application, it further includes a first encapsulation layer, a second encapsulation layer, and a third encapsulation layer disposed sequentially on the side of the optical adjustment layer away from the substrate.

[0012] According to any of the foregoing embodiments of the first aspect of this application, the material of the second encapsulation layer includes organic materials.

[0013] According to any of the foregoing embodiments of the first aspect of this application, the material of the second encapsulation layer includes organic ink.

[0014] According to any of the foregoing embodiments of the first aspect of this application, the material of the optical adjustment layer includes organic ink.

[0015] According to any of the foregoing embodiments of the first aspect of this application, the second encapsulation layer is made of the same material as the optical adjustment layer.

[0016] According to any of the foregoing embodiments of the first aspect of this application, the thickness of the second encapsulation layer along the thickness direction of the display panel is 0.1μm-10μm.

[0017] According to any of the foregoing embodiments of the first aspect of this application, the thickness of the second encapsulation layer along the thickness direction of the display panel is 0.5μm-2μm.

[0018] According to any of the foregoing embodiments of the first aspect of this application, the scattering particles include at least one of a first scattering particle, a second scattering particle, and a third scattering particle; wherein the diameter of the first scattering particle is less than 100 nm; the diameter of the first scattering particle is 1 nm-75 nm; and the diameters of the second and third scattering particles are greater than 100 nm.

[0019] According to any of the foregoing embodiments of the first aspect of this application, the diameters of the second scattering particle and the third scattering particle are 125nm-200nm.

[0020] According to any of the foregoing embodiments of the first aspect of this application, the second scattering particle and the third scattering particle have the same diameter.

[0021] According to any of the foregoing embodiments of the first aspect of this application, the light-emitting unit includes a blue light-emitting unit, a red light-emitting unit, and a green light-emitting unit.

[0022] According to any of the foregoing embodiments of the first aspect of this application, a scattering portion including a first scattering particle is provided on the side of the blue light-emitting unit away from the substrate, or a scattering portion including a first scattering particle is provided on the side of the blue light-emitting unit away from the substrate, the side of the red light-emitting unit away from the substrate, and the side of the green light-emitting unit away from the substrate.

[0023] According to any of the aforementioned embodiments of the first aspect of this application, a scattering portion including a second scattering particle and / or a third scattering particle is provided on the side of the red light-emitting unit away from the substrate, or a scattering portion including a second scattering particle and / or a third scattering particle is provided on the side of the blue light-emitting unit away from the substrate, the side of the red light-emitting unit away from the substrate, and the side of the green light-emitting unit away from the substrate.

[0024] According to any of the foregoing embodiments of the first aspect of this application, a scattering portion including a third scattering particle and / or a second scattering particle is provided on the side of the green light-emitting unit away from the substrate, or a scattering portion including a third scattering particle and / or a second scattering particle is provided on the side of the blue light-emitting unit away from the substrate, the side of the red light-emitting unit away from the substrate, and the side of the green light-emitting unit away from the substrate.

[0025] According to any of the foregoing embodiments of the first aspect of this application, the light-emitting unit includes: a plurality of light-emitting devices stacked together.

[0026] According to any of the foregoing embodiments of the first aspect of this application, among the plurality of light-emitting devices stacked together, there is a charge-generating layer between adjacent devices.

[0027] According to any of the foregoing embodiments of the first aspect of this application, a first electrode is provided on the side of the light-emitting unit facing the substrate, and a second electrode is provided on the side of the light-emitting unit away from the substrate.

[0028] An embodiment of the second aspect of this application provides a display device that includes a display panel of any of the above embodiments.

[0029] An embodiment of the third aspect of this application provides a method for manufacturing a display panel, comprising:

[0030] A pixel definition material layer is disposed on a substrate, and the pixel definition material layer is patterned to form a pixel definition layer. The pixel definition layer includes a pixel defining portion and a pixel opening formed in the pixel defining portion.

[0031] A first light-emitting layer is disposed on the side of the pixel definition material layer away from the substrate. The first light-emitting layer includes a plurality of light-emitting units, and the light-emitting units are located at the pixel opening.

[0032] Organic ink is inkjet printed onto the side of at least one light-emitting unit away from the substrate to prepare a scattering part, wherein the organic ink includes scattering particles.

[0033] An embodiment of the second aspect of this application provides a display device that includes a display panel of any of the above embodiments.

[0034] According to an embodiment of this application, a display panel is provided, comprising a substrate, a pixel definition layer, a light-emitting layer, and an optical adjustment layer. The pixel definition layer includes a pixel defining portion and a pixel opening formed by the pixel defining portion. The pixel opening is used to accommodate light-emitting units of the light-emitting layer, and the pixel defining portion is used to mitigate crosstalk between adjacent light-emitting units. The light-emitting units are used to realize the light-emitting display function of the display panel. The optical adjustment layer includes multiple scattering portions, located on the side of the light-emitting unit of at least one pixel opening facing away from the substrate, and the multiple scattering portions include scattering particles. The scattering particles in the scattering portions can scatter the light emitted by the light-emitting units. By reasonably setting the position of the scattering portions, the possibility of color shift in the display panel can be reduced, thereby improving the display effect of the display panel. Attached Figure Description

[0035] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals denote the same or similar features, and the drawings are not drawn to scale.

[0036] Figure 1 This is one of the structural schematic diagrams of a display panel provided in the first aspect embodiment of this application;

[0037] Figure 2 This is a second schematic diagram of the structure of a display panel provided in the first aspect of this application;

[0038] Figure 3 This is a graph showing the relationship between light scattering intensity and radiation wavelength provided in the first aspect embodiment of this application;

[0039] Figure 4 This is a third schematic diagram of the structure of a display panel provided in the first aspect embodiment of this application;

[0040] Figure 5 This is the fourth schematic diagram of the structure of a display panel provided in the first aspect of this application;

[0041] Figure 6 This is a schematic diagram of the structure of a display panel provided in another embodiment;

[0042] Figure 7 This is a schematic flowchart of a method for manufacturing a display panel according to a third aspect embodiment of this application;

[0043] Figure 8 This is one of the structural schematic diagrams of a display panel provided in the third aspect embodiment of this application;

[0044] Figure 9 This is a second schematic diagram of the structure of a display panel provided in the third aspect of this application.

[0045] Explanation of reference numerals in the attached figures:

[0046] 10. Display panel;

[0047] 100. Substrate;

[0048] 200, Pixel definition layer; 210, Pixel limiting section; 220, Pixel opening;

[0049] 300. Light-emitting layer; 310. Light-emitting unit; 311. Blue light-emitting unit; 312. Red light-emitting unit; 313. Green light-emitting unit;

[0050] 400, Optical adjustment layer; 410, Scattering section; 411, Top surface; 412, Vertex; 413, End point; 420, Scattering particle; 421, First scattering particle; 422, Second scattering particle; 423, Third scattering particle;

[0051] 500, First encapsulation layer; 510, Second encapsulation layer; 520, Third encapsulation layer;

[0052] 600, Light-emitting device; 610, Charge generation layer; 620, First electrode; 630, Second electrode. Detailed Implementation

[0053] 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.

[0054] 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.

[0055] 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.

[0056] In OLED devices, achieving high brightness using only a single-layer device would result in excessive driving current, causing a surge in heat and affecting device performance and lifespan. Current technologies typically utilize multilayer OLEDs to increase brightness. Multilayer OLED devices connect two or more light-emitting units in series through a charge generation layer, thereby improving current efficiency, extending device lifespan, and meeting the brightness requirements for lighting applications. However, existing multilayer devices exhibit color shifts at different viewing angles.

[0057] To address the aforementioned problems, this application provides a display panel and a display device. The following description, in conjunction with the accompanying drawings, will illustrate various embodiments of the display panel and the display device.

[0058] This application provides a display panel, which may be an organic light-emitting diode (OLED) display panel.

[0059] Please refer to the following: Figures 1 to 2 , Figure 1 This is one of the structural schematic diagrams of a display panel provided in the first aspect embodiment of this application. Figure 2 This is a second schematic diagram of the structure of a display panel provided in the first aspect of this application.

[0060] like Figures 1 to 2 As shown, a first aspect of this application provides a display panel 10, which includes a substrate 100, a pixel definition layer 200, a light-emitting layer 300, and an optical adjustment layer 400. The pixel definition layer 200 is located on one side of the substrate 100 and includes a pixel defining portion 210 and a pixel opening 220 formed by the pixel defining portion 210. The light-emitting layer 300 includes a plurality of light-emitting units 310 located in the pixel opening 220. The optical adjustment layer 400 includes a plurality of scattering portions 410, each scattering portion 410 located on the side of at least one light-emitting unit 310 in the pixel opening 220 facing away from the substrate 100, and the plurality of scattering portions 410 include scattering particles 420 of a predetermined diameter.

[0061] A display panel 10 according to an embodiment of this application includes a substrate 100, a pixel definition layer 200, a light-emitting layer 300, and an optical adjustment layer 400. The pixel definition layer 200 includes a pixel defining portion 210 and a pixel opening 220 formed by the pixel defining portion 210. The pixel opening 220 is used to accommodate light-emitting units 310 of the light-emitting layer 300, and the pixel defining portion 210 is used to improve the problem of light crosstalk between adjacent light-emitting units. The light-emitting units 310 are used to realize the light-emitting display function of the display panel 10. The optical adjustment layer 400 includes a plurality of scattering portions 410, which are located on the side of at least one light-emitting unit 310 in the pixel opening 220 facing away from the substrate 100. The plurality of scattering portions 410 include scattering particles 420. The scattering particles 420 in the scattering portions 410 can scatter the light emitted by the light-emitting units 310. By reasonably setting the position of the scattering portions 410, the possibility of color shift in the display panel 10 can be reduced, and the display effect of the display panel 10 can be improved.

[0062] Typically, there can be multiple light-emitting units 310, and the light-emitting colors of the multiple light-emitting units 310 can be different.

[0063] In this embodiment, the scattering particles 420 in the scattering part 410 can scatter light of different colors emitted by the light-emitting unit 310. By reasonably setting the position of the scattering part 410, the possibility of color shift in the display panel 10 can be reduced, and the display effect of the display panel 10 can be improved.

[0064] Optionally, the multiple light-emitting units 310 can emit different colors to achieve a color display of the display panel 10. For example, the light-emitting units 310 include a red light-emitting unit 312 for emitting red light, a green light-emitting unit 313 for emitting green light, and a blue light-emitting unit 311 for emitting blue light.

[0065] Optional, such as Figure 3 As shown, the degree of scattering varies as a function of the ratio of the quantum dot particle radius (r) to the radiation wavelength (λ). Many other factors, such as polarization, angle, and coherence, also affect the degree of scattering. Therefore, the dimensionless scale number α = 2πr / λ is often used as a criterion.

[0066] For example, the wavelength of blue light is typically 400nm-480nm, and the diameter of blue quantum dots is generally 1nm-8nm. When the wavelength of blue light is 450nm and the diameter of the blue quantum dots can be 4nm, substituting into the above formula, we can obtain α approximately equal to 0.03. When α is much less than 0.1, the light scattering is Rayleigh scattering, which scatters blue light relatively well. When α ≥ 0.1, the light scattering is Mie dispersion, which scatters red and red light relatively well.

[0067] In some alternative embodiments, the material of the optical adjustment layer 400 includes organic materials.

[0068] In these alternative embodiments, the optical adjustment layer 400 can be an organic material layer, which can be prepared by inkjet printing, so that the optical adjustment layer 400 has a suitable thickness and shape to meet the requirements of scattered light.

[0069] Optionally, the material of the optical adjustment layer 400 includes at least one of polyvinylcarbazole, F8BT, and 2-tert-butyl-9,10-bis(2-naphthyl)anthracene.

[0070] In some alternative embodiments, the scattering portion 410 includes a top surface 411 facing away from the substrate 100, the top surface 411 being disposed in a direction away from the substrate 100.

[0071] In these alternative embodiments, due to the properties of organic materials, when printing the scattering portion 410, the top surface 411 of the scattering portion 410 facing away from the substrate 100 is a protruding surface. The protruding surface can change the light emission angle, making the emitted light more diffuse, thereby further increasing the scattering of light.

[0072] The top surface 411 being convex in a direction away from the substrate 100 means that the top surface 411 includes an edge region and a central region located within the edge region, the central region being convex in a direction away from the substrate 100 relative to the edge region, and the distance between the central region and the substrate being greater than the distance between the edge region and the substrate.

[0073] Optionally, the top surface 411 of the scattering part 410 can be arc-shaped, mountain-shaped, or part of a sphere, etc.

[0074] Optionally, the top surface 411 of the scattering part 410 includes a vertex 412, and the two ends of the top surface 411 of the scattering part 410 that contact the pixel definition layer 200 include two endpoints 413. The shape of the top surface 411 of the scattering part 410 is not specifically limited, as long as the distance from the scattering part 410 to the pixel definition layer 200 gradually decreases in the direction from the vertex 412 to the two endpoints 413.

[0075] Optionally, the top surface 411 of the scattering part 410 can be part of a sphere, which can make the light emitted from the scattering part 410 more uniformly dispersed.

[0076] In some alternative embodiments, the maximum distance from the scattering portion 410 to the substrate 100 is less than the maximum distance from the pixel definition layer 200 to the substrate 100.

[0077] In these alternative embodiments, the scattering portion 410 is located within the pixel opening 220. The maximum distance from the scattering portion 410 to the substrate 100 is less than the maximum distance from the pixel definition layer 200 to the substrate 100, which can ensure the scattering requirement while saving organic materials, and also allows the scattering portion 410 to fill the depression formed by the pixel opening 220, thereby improving the flatness of the film surface.

[0078] In some alternative embodiments, such as Figure 2 As shown, the display panel 10 also includes a first encapsulation layer 500, a second encapsulation layer 510 and a third encapsulation layer 520 sequentially disposed on the side of the optical adjustment layer 400 away from the substrate 100.

[0079] In these optional embodiments, the display panel 10 further includes a first encapsulation layer 500, a second encapsulation layer 510, and a third encapsulation layer 520 sequentially disposed on the side of the optical adjustment layer 400 away from the substrate 100. The first encapsulation layer 500, the second encapsulation layer 510, and the third encapsulation layer 520 can encapsulate the display panel 10 to ensure the effectiveness of the encapsulation.

[0080] Optionally, the first encapsulation layer 500 is an inorganic encapsulation layer. The inorganic encapsulation layer can be prepared by chemical vapor deposition, which can improve the density of the first encapsulation layer 500 and thus improve the encapsulation effect of the encapsulation layer.

[0081] Optionally, the display panel 10 further includes a second encapsulation layer 510 located on the side of the first encapsulation layer 500 facing away from the substrate 100. The material of the second encapsulation layer 510 includes organic materials. That is, the second encapsulation layer 510 is an organic encapsulation layer. The organic encapsulation layer can be prepared by inkjet printing, which can make the second encapsulation layer 510 have a suitable thickness. Optionally, the material of the second encapsulation layer 510 may include organic ink.

[0082] Optionally, the material of the optical adjustment layer 400 can be prepared by inkjet printing, and the material of the optical adjustment layer 400 may include organic ink.

[0083] Optionally, the second encapsulation layer 510 can be made of the same material as the optical adjustment layer 400, so that the second encapsulation layer 510 and the optical adjustment layer 400 can be fabricated using the same equipment, which can simplify the fabrication process of the display panel 10.

[0084] Optionally, the display panel 10 may further include a third encapsulation layer 520 located on the side of the second encapsulation layer 510 facing away from the substrate 100, and the material of the third encapsulation layer 520 includes inorganic materials. That is, the third encapsulation layer 520 is an inorganic encapsulation layer, and adding another inorganic encapsulation layer outside the organic encapsulation layer can further improve the encapsulation effect of the encapsulation layer.

[0085] Optionally, the first encapsulation layer 500 and the third encapsulation layer 520 can be made of the same material. This allows the first encapsulation layer 500 and the third encapsulation layer 520 to be manufactured using the same equipment, simplifying the manufacturing process of the display panel 10.

[0086] Optionally, the material of the second encapsulation layer 510 includes at least one of polyvinylcarbazole, F8BT, and 2-tert-butyl-9,10-bis(2-naphthyl)anthracene, and the materials of the second encapsulation layer 510 and the optical adjustment layer 400 can be the same material, so that the second encapsulation layer and the optical adjustment layer 400 can be prepared using the same equipment, which can simplify the manufacturing process of the display panel 10.

[0087] Optionally, the thickness of the second encapsulation layer 510 along the thickness direction of the display panel 10 can be 0.1μm-10μm. For example, the thickness of the second encapsulation layer 510 along the thickness direction of the display panel 10 can be 0.1μm, 1μm, 5μm, 8μm and 10μm. This can improve the problem that the maximum distance between the second encapsulation layer 510 and the substrate 100 is less than the maximum distance between the pixel definition layer 200 and the substrate 100 due to the second encapsulation layer 510 being too thin, thus making it impossible for the second encapsulation layer 510 to become flat. At the same time, it can improve the problem that the thickness of the second encapsulation layer 510 affects the thinness of the display panel 10.

[0088] Optionally, the thickness of the second encapsulation layer 510 along the thickness direction of the display panel 10 can be 0.5μm-2μm. For example, the thickness of the second encapsulation layer 510 along the thickness direction of the display panel 10 can be 0.5μm, 0.8μm, 1μm, 1.5μm and 2μm. This can ensure the thickness of the second encapsulation layer 510, so that the second encapsulation layer 510 cannot become flat, and at the same time improve the problem of affecting the thinness of the display panel 10 due to the second encapsulation layer 510 being too thick.

[0089] In some alternative embodiments, such as Figure 1 As shown, the scattering particle 420 includes at least one of a first scattering particle 421, a second scattering particle 422, and a third scattering particle 423. The diameter of the first scattering particle 421 is less than 100 nm. The diameters of the second scattering particle 422 and the third scattering particle 423 are greater than 100 nm.

[0090] In these optional embodiments, the diameter of the first scattering particle 421 is less than 100 nm. For example, when the diameter of the first scattering particle 421 is 4 nm, the scattering of blue light is better. The diameters of the second scattering particle 422 and the third scattering particle 423 are greater than 100 nm. For example, when the diameters of the second scattering particle 422 and the third scattering particle 423 are 120 nm, the scattering of red and green light is better.

[0091] Optionally, when the display panel 10 is bluish, it is necessary to scatter the blue light. In this case, a first scattering particle 421 with a better scattering degree for blue light can be provided in the scattering part 410. The scattering part 410 with the first scattering particle 421 can be located only on the side of the blue light-emitting unit 311 facing away from the substrate 100, while the side of the red light-emitting unit 312 facing away from the substrate 100 and the side of the green light-emitting unit 313 facing away from the substrate 100 do not have a scattering part 410 containing scattering particles 420. Figure 4 As shown, the scattering portion 410, which is provided with the first scattering particle 421, can also be located simultaneously on the side of the blue light-emitting unit 311 facing away from the substrate 100, the side of the red light-emitting unit 312 facing away from the substrate 100, and the side of the green light-emitting unit 313 facing away from the substrate 100. This allows the scattering portions 410 corresponding to the light-emitting units 310 of different colors to be prepared using the same equipment, thereby simplifying the process flow.

[0092] Optionally, when the display panel 10 is reddish, it is necessary to scatter the red light. In this case, at least one of the second scattering particles 422 and the third scattering particles 423 can be provided in the scattering section 410. That is, when the display panel 10 is reddish, the scattering section 410 with at least one of the second scattering particles 422 and the third scattering particles 423 can be located only on the side of the red light-emitting unit 312 facing away from the substrate 100, while the side of the blue light-emitting unit 311 facing away from the substrate 100 and the side of the green light-emitting unit 313 facing away from the substrate 100 do not have a scattering section 410 containing scattering particles 420. Figure 5 As shown, at least one of the second scattering particle 422 and the third scattering particle 423 can also be simultaneously disposed in the scattering portion 410 on the side of the blue light-emitting unit 311 facing away from the substrate 100, the scattering portion 410 on the side of the red light-emitting unit 312 facing away from the substrate 100, and the scattering portion 410 on the side of the green light-emitting unit 313 facing away from the substrate 100. This allows the scattering portions 410 corresponding to different colored light-emitting units 310 to be fabricated using the same equipment, thereby simplifying the process flow.

[0093] Optionally, when the display panel 10 has a greenish tint, it is necessary to scatter the green light. In this case, at least one of the second scattering particles 422 and the third scattering particles 423 can be provided within the scattering section 410. That is, when the display panel 10 has a greenish tint, the scattering section 410 with at least one of the second scattering particles 422 and the third scattering particles 423 can be located only on the side of the green light-emitting unit 313 facing away from the substrate 100, while the side of the blue light-emitting unit 311 facing away from the substrate 100 and the side of the red light-emitting unit 312 facing away from the substrate 100 do not have a scattering section 410 containing scattering particles 420. Figure 5As shown, at least one of the second scattering particle 422 and the third scattering particle 423 can be simultaneously disposed in the scattering portion 410 on the side of the blue light-emitting unit 311 facing away from the substrate 100, the scattering portion 410 on the side of the red light-emitting unit 312 facing away from the substrate 100, and the scattering portion 410 on the side of the green light-emitting unit 313 facing away from the substrate 100. This allows the scattering portions 410 corresponding to different colored light-emitting units 310 to be fabricated using the same equipment, thereby simplifying the process flow.

[0094] Optional, such as Figure 1 As shown, when the display panel 10 appears bluish from one angle and bluish or greenish from another angle, a scattering part 410 containing a first scattering particle 421 can be provided on the side of the blue light-emitting unit 311 away from the substrate 100, and a scattering part 410 containing a second scattering particle 422 or a third scattering particle 423 can be provided on the side of the red light-emitting unit 312 or the green light-emitting unit 313 away from the substrate 100.

[0095] Optionally, the diameter of the first scattering particle 421 is 1nm-75nm. When the diameter of the first scattering particle 421 is 75nm, the problem of difficult manufacturing caused by the small diameter of the first scattering particle 421 can be improved, and the problem of poor scattering of blue light caused by the large diameter of the first scattering particle 421 can also be improved.

[0096] Optionally, the diameters of the second scattering particle 422 and the third scattering particle 423 are 125nm-200nm, which provides good scattering of red and green light. When the diameters of the second scattering particle 422 and the third scattering particle 423 are 150nm, the problem of poor scattering effect caused by the small diameters of the second scattering particle 422 and the third scattering particle 423, as well as the problem of material waste caused by the large diameters of the second scattering particle 422 and the third scattering particle 423, can be improved.

[0097] Optionally, the diameters of the second scattering particle 422 and the third scattering particle 423 can be the same, which can further simplify the manufacturing process.

[0098] In some alternative embodiments, such as Figure 6 As shown, the light-emitting unit 310 includes a plurality of light-emitting devices 600 stacked together.

[0099] In these alternative embodiments, the OLED device is a stacked device, with multiple light-emitting devices 600 stacked, which can increase the brightness of the display panel 10.

[0100] Optionally, among the multiple light-emitting devices 600 stacked together, there is a charge-generating layer 610 between adjacent pairs. The multiple light-emitting devices 600 share a single charge-generating layer 610. By connecting the multiple light-emitting devices 600 in series through the charge-generating layer 610, the brightness of the display panel 10 can be increased.

[0101] In some optional embodiments, a first electrode 620 is provided on the side of the light-emitting unit 310 facing the substrate 100, and a second electrode 630 is provided on the side of the light-emitting unit 310 away from the substrate 100.

[0102] In these optional embodiments, the first electrode 620 and the second electrode 630 jointly drive the light-emitting unit 310 within the pixel opening 220 to emit light. One of the first electrode 620 and the second electrode 630 is an anode, and the other is a cathode. This application embodiment uses the first electrode 620 as the anode and the second electrode 630 as the cathode for illustrative purposes. Specifically, the light-emitting device 600 on the side closer to the substrate 100 uses the first electrode 620 as the anode and the charge-generating layer 610 as the cathode. The light-emitting device 600 on the side away from the substrate 100 uses the second electrode 630 as the cathode and the charge-generating layer 610 as the cathode.

[0103] An embodiment of the second aspect of this application provides a display device that includes a display panel 10 of any of the above embodiments.

[0104] A display device according to an embodiment of this application includes a display panel 10, which includes a substrate 100, a pixel definition layer 200, a light-emitting layer 300, and an optical adjustment layer 400. The pixel definition layer 200 includes a pixel defining portion 210 and a pixel opening 220 formed by the pixel defining portion 210. The pixel opening 220 is used to accommodate light-emitting units 310 of the light-emitting layer 300, and the pixel defining portion 210 is used to improve the problem of light crosstalk between adjacent light-emitting units. The light-emitting units 310 are used to realize the light-emitting display function of the display panel 10. The optical adjustment layer 400 includes a plurality of scattering portions 410, which are located on the side of at least one light-emitting unit 310 in the pixel opening 220 facing away from the substrate 100. The plurality of scattering portions 410 include scattering particles 420. The scattering particles 420 in the scattering portions 410 can scatter the light emitted by the light-emitting units 310. By reasonably setting the position of the scattering portions 410, the possibility of color shift in the display panel 10 can be reduced, and the display effect of the display panel 10 can be improved.

[0105] The display device can be a computer, mobile phone, etc., and is not limited thereto. As long as the display device includes the display panel 10 of any of the above embodiments.

[0106] The display devices in the embodiments of the present invention include, but are not limited to, mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, control consoles, and other devices with display functions.

[0107] An embodiment of the third aspect of this application provides a method for manufacturing a display panel 10, such as... Figure 7 As shown, it includes:

[0108] Step S01: As Figure 8 As shown, a pixel definition material layer is provided on the substrate 100, and the pixel definition material layer is patterned to form a pixel definition layer 200. The pixel definition layer 200 includes a pixel limiting portion 210 and a pixel opening 220 formed in the pixel limiting portion 210.

[0109] Step S02: As Figure 9 As shown, a first light-emitting layer 300 is provided on the side of the pixel definition material layer away from the substrate 100. The first light-emitting layer 300 includes a plurality of light-emitting units 310, and the light-emitting units 310 are located in the pixel opening 220.

[0110] Step S03: As Figure 1 As shown, organic ink is inkjet printed onto at least one light-emitting unit 310 on the side opposite to the substrate 100 to prepare a scattering part 410, wherein the organic ink includes scattering particles 420.

[0111] In a method for manufacturing a display panel 10 provided in this application embodiment, firstly, a pixel definition material layer is formed on a substrate 100 in step S01, and the pixel definition material layer is patterned to form a pixel definition layer 200. The pixel definition layer 200 includes a pixel defining portion 210 and a pixel opening 220 formed in the pixel defining portion 210. Then, in step S02, a first light-emitting layer 300 is formed on the side of the pixel definition material layer away from the substrate 100. The first light-emitting layer 300 includes a plurality of light-emitting units 310, which are located in the pixel opening 220 to realize the display function of the display panel 10. Finally, in step S03, a scattering portion 410 is formed on the side of at least one light-emitting unit 310 away from the substrate 100, and the organic ink includes scattering particles 420. When the display panel 10 experiences color shift, the possibility of color shift can be reduced by reasonably setting the position of the scattering portion 410, thereby improving the display effect of the display panel 10.

[0112] The embodiments described above are not exhaustive, nor do they limit the invention to the specific embodiments described. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to effectively utilize this application and its modifications. This application is limited only by the claims and their full scope and equivalents.

Claims

1. A display panel, characterized in that, The display panel includes: substrate; A pixel definition layer is located on one side of the substrate, and the pixel definition layer includes a pixel defining portion and a pixel opening formed by the pixel defining portion; The light-emitting layer includes a plurality of light-emitting units located at the pixel opening; An optical adjustment layer includes multiple scattering portions located on the side of the light-emitting unit of at least one pixel opening away from the substrate, and the multiple scattering portions include scattering particles.

2. The display panel according to claim 1, characterized in that, The material of the optical adjustment layer includes organic materials; Preferably, the material of the optical adjustment layer includes at least one of polyvinylcarbazole, poly[(9,9-di-n-octylfluorenyl-2,7-diyl)-alt-(benzo[2,1,3]thiadiazole-4,8-diyl)], and 2-tert-butyl-9,10-bis(2-naphthyl)anthracene.

3. The display panel according to claim 1, characterized in that, The scattering portion includes a top surface facing away from the substrate, the top surface being convex in a direction away from the substrate; Preferably, the top surface is part of a sphere.

4. The display panel according to claim 1, characterized in that, The maximum distance from the scattering portion to the substrate is less than the maximum distance from the pixel definition layer to the substrate.

5. The display panel according to claim 1, characterized in that, It also includes a first encapsulation layer, a second encapsulation layer, and a third encapsulation layer sequentially disposed on the side of the optical adjustment layer away from the substrate; Preferably, the material of the second encapsulation layer includes organic materials; Preferably, the material of the second encapsulation layer includes organic ink; Preferably, the material of the optical adjustment layer includes organic ink; Preferably, the second encapsulation layer is made of the same material as the optical adjustment layer; Preferably, the thickness of the second encapsulation layer along the thickness direction of the display panel is 0.1μm-10μm; Preferably, the thickness of the second encapsulation layer along the thickness direction of the display panel is 0.5μm-2μm.

6. The display panel according to claim 1, characterized in that, The scattering particles include at least one of a first scattering particle, a second scattering particle, and a third scattering particle. Wherein, the diameter of the first scattering particle is less than 100 nm, and the diameters of the second scattering particle and the third scattering particle are greater than 100 nm; Preferably, the diameter of the first scattering particle is 1 nm-75 nm; Preferably, the diameters of the second scattering particle and the third scattering particle are 125nm-200nm; Preferably, the second scattering particle and the third scattering particle have the same diameter; Preferably, the light-emitting unit includes a blue light-emitting unit, a red light-emitting unit, and a green light-emitting unit.

7. The display panel according to claim 1, characterized in that, The light-emitting unit includes: a plurality of light-emitting devices stacked together; Preferably, among the multiple light-emitting devices stacked together, there is a charge-generating layer between adjacent devices.

8. The display panel according to claim 7, characterized in that, The light-emitting unit has a first electrode on the side facing the substrate and a second electrode on the side facing away from the substrate.

9. A display device, characterized in that, Includes the display panel as described in any one of claims 1-8.

10. A method for manufacturing a display panel, characterized in that, include: A pixel definition material layer is disposed on a substrate, and the pixel definition material layer is patterned to form a pixel definition layer, wherein the pixel definition layer includes a pixel defining portion and a pixel opening formed in the pixel defining portion; A first light-emitting layer is disposed on the side of the pixel definition material layer opposite to the substrate. The first light-emitting layer includes a plurality of light-emitting units, and the light-emitting units are located at the pixel opening. Organic ink is inkjet printed onto at least one of the light-emitting units on the side opposite to the substrate to prepare a scattering portion, wherein the organic ink includes scattering particles.

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