Display panel, display device and method for manufacturing display panel

Abstract

The application discloses a display panel, a display device and a preparation method of the display panel. The display panel comprises a substrate, an isolation structure, a light-emitting layer and at least one light extraction structure. The isolation structure is arranged on the substrate and encloses a plurality of isolated openings to separate the light-emitting layer into mutually disconnected light-emitting units. The light extraction unit comprises a high-refractive layer and a low-refractive layer, the refractive index of the high-refractive layer is greater than that of the low-refractive layer, the high-refractive layer and the low-refractive layer constitute a distributed Bragg reflector, have a higher light extraction effect, and improve the light extraction efficiency of the display panel. A plurality of groups of light extraction units arranged in layers are arranged in at least part of the isolated openings, the number of the light extraction units corresponding to different color light-emitting units can be adaptively adjusted, so that the light extraction efficiency corresponding to each color light-emitting unit can be maximally improved, and the display effect and use performance of the display panel are further improved.

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 to be improved. 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 performance of the display panel.

[0005] The first aspect of this application provides a display panel, which includes: a substrate; an isolation structure located on the substrate, the isolation structure enclosing a plurality of isolation openings; a light-emitting layer located on the substrate, the light-emitting layer including a plurality of light-emitting units, at least a portion of the light-emitting units being located within corresponding isolation openings; and at least one light extraction structure located on at least one side of the plurality of light-emitting units facing away from the substrate, the light extraction structure including a plurality of light extraction units stacked together, the light extraction unit including a high-refractive-index layer and a low-refractive-index layer, the low-refractive-index layer being located on the side of the high-refractive-index layer facing away from the substrate, the refractive index of the high-refractive-index layer being greater than the refractive index of the low-refractive-index layer.

[0006] According to an embodiment of the first aspect of this application, a plurality of light-emitting units include a first light-emitting unit and a second light-emitting unit, a plurality of isolation openings include a first isolation opening and a second isolation opening, the first light-emitting unit is located in the first isolation opening, the second light-emitting unit is located in the second isolation opening, and at least one light extraction structure includes a first light extraction structure and a second light extraction structure, the first light extraction structure is located on the side of the first light-emitting unit away from the substrate, and the second light extraction structure is located on the side of the second light-emitting unit away from the substrate; the first light extraction structure includes a first number of first light extraction units, and the second light extraction structure includes a second number of second light extraction units, wherein the first number is not equal to the second number.

[0007] According to any of the foregoing embodiments of the first aspect of this application, the plurality of light-emitting units further includes a third light-emitting unit, the plurality of isolation openings further includes a third isolation opening, the third light-emitting unit is located in the third isolation opening, at least one light extraction structure includes a third light extraction structure, the third light extraction structure is located on the side of the third light-emitting unit away from the substrate, the third light extraction structure includes a third number of third light extraction units, the first number is not equal to the third number.

[0008] According to any of the foregoing embodiments of the first aspect of this application, the second quantity is not equal to the third quantity.

[0009] According to any of the foregoing embodiments of the first aspect of this application, a plurality of light-emitting units include a first light-emitting unit and a second light-emitting unit, a plurality of isolation openings include a first isolation opening and a second isolation opening, the first light-emitting unit is located in the first isolation opening, the second light-emitting unit is located in the second isolation opening, and at least one light extraction structure includes a first light extraction structure and a second light extraction structure, the first light extraction structure is located on the side of the first light-emitting unit away from the substrate, and the second light extraction structure is located on the side of the second light-emitting unit away from the substrate; the first light extraction structure includes a first light extraction unit of a first thickness, and the second light extraction structure includes a second light extraction unit of a second thickness, wherein the first thickness is not equal to the second thickness.

[0010] According to any of the foregoing embodiments of the first aspect of this application, the plurality of light-emitting units further includes a third light-emitting unit, the plurality of isolation openings further includes a third isolation opening, the third light-emitting unit is located in the third isolation opening, at least one light extraction structure includes a third light extraction structure, the third light extraction structure is located on the side of the third light-emitting unit away from the substrate, the third light extraction structure includes a third light extraction unit of a third thickness, and the first thickness is not equal to the third thickness.

[0011] According to any of the foregoing embodiments of the first aspect of this application, the second thickness is not equal to the third thickness.

[0012] According to any of the foregoing embodiments of the first aspect of this application, the number of the first light extraction unit and the second light extraction unit are equal.

[0013] According to any of the foregoing embodiments of the first aspect of this application, the first thickness is less than the second thickness.

[0014] According to any of the foregoing embodiments of the first aspect of this application, the thickness of the high-refractive layer in the first isolation opening is less than that in the second isolation opening.

[0015] According to any of the foregoing embodiments of the first aspect of this application, the thickness of the low-refractive layer in the first isolation opening is less than that in the second isolation opening.

[0016] According to any of the foregoing embodiments of the first aspect of this application, the number of the second light extraction unit and the third light extraction unit are equal.

[0017] According to any of the foregoing embodiments of the first aspect of this application, the second thickness is less than the third thickness.

[0018] According to any of the foregoing embodiments of the first aspect of this application, the thickness of the high-refractive layer in the second isolation opening is less than that in the third isolation opening.

[0019] According to any of the foregoing embodiments of the first aspect of this application, the thickness of the low-refractive layer in the second isolation opening is less than that in the third isolation opening.

[0020] According to any of the foregoing embodiments of the first aspect of this application, the refractive index of the high-refractive layer is 1.6 to 2.5.

[0021] According to any of the foregoing embodiments of the first aspect of this application, the refractive index of the low-refractive layer is 1 to 1.5.

[0022] According to any of the foregoing embodiments of the first aspect of this application, the thickness of the high-refractive-index layer within the first isolation opening is 60 nm to 80 nm.

[0023] According to any of the foregoing embodiments of the first aspect of this application, the thickness of the low-refractive layer within the first isolation opening is 110 nm to 130 nm.

[0024] According to any of the foregoing embodiments of the first aspect of this application, the thickness of the high-refractive layer in the second isolation opening is 50 nm to 70 nm.

[0025] According to any of the foregoing embodiments of the first aspect of this application, the thickness of the low-refractive layer in the second isolation opening is 90 nm to 110 nm.

[0026] According to any of the foregoing embodiments of the first aspect of this application, the thickness of the high-refractive layer within the third isolation opening is 45 nm to 60 nm.

[0027] According to any of the foregoing embodiments of the first aspect of this application, the thickness of the low-refractive layer within the third isolation opening is 80 nm to 100 nm.

[0028] According to any of the foregoing embodiments of the first aspect of this application, the material of the high-refractive-index layer includes at least one of light-extracting materials, titanium oxide, and zinc sulfide.

[0029] According to any of the foregoing embodiments of the first aspect of this application, the low refractive index material includes at least one of lithium fluoride, silicon dioxide, and calcium fluoride.

[0030] According to any of the foregoing embodiments of the first aspect of this application, the display panel further includes: a first encapsulation layer located on the side of the light extraction structure away from the substrate, the first encapsulation layer including an encapsulation portion located in the isolation opening, the encapsulation portion being used to encapsulate the light-emitting unit.

[0031] According to any of the foregoing embodiments of the first aspect of this application, the thickness of the encapsulation portion within at least a portion of the isolation opening is different.

[0032] According to any of the foregoing embodiments of the first aspect of this application, the thickness of the encapsulation portion within at least two of the first isolation opening, the second isolation opening, and the third isolation opening is different.

[0033] According to any of the foregoing embodiments of the first aspect of this application, the display panel further includes: a second encapsulation layer located on the side of the first encapsulation layer opposite to the substrate; and a third encapsulation layer located on the side of the second encapsulation layer opposite to the substrate.

[0034] According to any of the foregoing embodiments of the first aspect of this application, the material of the second encapsulation layer includes an organic material.

[0035] According to any of the foregoing embodiments of the first aspect of this application, the material of the third encapsulation layer includes inorganic materials.

[0036] According to any of the foregoing embodiments of the first aspect of this application, the display panel further includes: a first electrode layer, including a first electrode located at an isolation opening, the first electrode being located between the light-emitting unit and the light extraction structure and electrically connected to the isolation structure.

[0037] According to any of the foregoing embodiments of the first aspect of this application, the orthogonal projection of the light-emitting unit onto the substrate is located within the orthogonal projection of the first electrode onto the substrate.

[0038] According to any of the foregoing embodiments of the first aspect of this application, the light-emitting unit and the isolation structure are arranged at intervals.

[0039] According to any of the foregoing embodiments of the first aspect of this application, the material of the first electrode includes a transparent metal oxide.

[0040] According to any of the foregoing embodiments of the first aspect of this application, the isolation structure includes a first layer and a second layer, the second layer being located on the side of the first layer away from the substrate, and the orthographic projection of the first layer onto the substrate being located within the orthographic projection of the second layer onto the substrate.

[0041] According to any of the foregoing embodiments of the first aspect of this application, the first layer includes a conductive material.

[0042] According to any of the foregoing embodiments of the first aspect of this application, the second layer includes a conductive material or an insulating material.

[0043] According to any of the foregoing embodiments of the first aspect of this application, both the first layer and the second layer include metallic materials, and the materials of the first layer and the second layer are different.

[0044] According to any of the foregoing embodiments of the first aspect of this application, the isolation structure further includes a third layer located on the side of the first layer facing the substrate, wherein the orthographic projection of the first layer onto the substrate is located within the orthographic projection of the third layer onto the substrate.

[0045] According to any of the foregoing embodiments of the first aspect of this application, the display panel further includes: a pixel definition layer located on the substrate, the pixel definition layer including a pixel defining portion and a pixel opening formed by the pixel defining portion, the pixel opening and the isolation opening being connected.

[0046] According to any of the foregoing embodiments of the first aspect of this application, the display panel further includes a second electrode, which is located between the substrate and the pixel definition layer and is exposed through a pixel opening.

[0047] A second aspect of this application provides a display panel, the display panel comprising: a substrate;

[0048] A light-emitting layer is located on the substrate, and the light-emitting layer includes multiple light-emitting units;

[0049] At least one light extraction structure is located on at least one side of a plurality of light-emitting units facing away from the substrate. The light extraction structure includes a plurality of light extraction units stacked together. Each light extraction unit includes a high-refractive-index layer and a low-refractive-index layer. The low-refractive-index layer is located on the side of the high-refractive-index layer facing away from the substrate. The refractive index of the high-refractive-index layer is greater than that of the low-refractive-index layer.

[0050] An embodiment of the third aspect of this application provides a display device that includes a display panel of any of the above embodiments.

[0051] An embodiment of the fourth aspect of this application provides a method for manufacturing a display panel, comprising:

[0052] An isolation structure is fabricated on a substrate, and the isolation structure encloses and forms multiple isolation openings;

[0053] A light-emitting layer is prepared on a substrate, the light-emitting layer comprising a plurality of light-emitting units, at least a portion of which is located within a corresponding isolation opening;

[0054] A light extraction structure is fabricated on the side of the light-emitting layer away from the substrate. The light extraction structure includes multiple light extraction units stacked together. Each light extraction unit includes a high-refractive-index layer and a low-refractive-index layer. The low-refractive-index layer is located on the side of the high-refractive-index layer away from the substrate, and the refractive index of the high-refractive-index layer is greater than that of the low-refractive-index layer.

[0055] According to an embodiment of this application, the display panel includes a substrate, an isolation structure, a light-emitting layer, and at least one light extraction structure. The isolation structure is disposed on the substrate and forms multiple isolation openings to isolate the light-emitting layer, forming mutually disconnected light-emitting units. This reduces crosstalk of charge carriers within the light-emitting layer, improves the display effect of the display panel, and eliminates the need for precision photomasks in the fabrication of the light-emitting units, reducing the development and use of precision photomasks and lowering manufacturing costs. At least one light extraction structure is located on at least one side of the multiple light-emitting units facing away from the substrate. The light extraction structure includes multiple stacked light extraction units, each comprising a high-refractive-index layer and a low-refractive-index layer. The refractive index of the high-refractive-index layer is greater than that of the low-refractive-index layer. The high-refractive-index layer and the low-refractive-index layer constitute a distributed Bragg reflector (DBR), which has a high light extraction effect and improves the light extraction efficiency of the display panel. At least some of the isolation openings are provided with multiple stacked light extraction units, which can adaptively adjust the number of light extraction units corresponding to different color light-emitting units, so as to maximize the light extraction efficiency of each color light-emitting unit, and further improve the display effect and performance of the display panel. Attached Figure Description

[0056] 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.

[0057] Figure 1 This is a partial cross-sectional view of a display panel provided in an embodiment of this application;

[0058] Figure 2 This is a partial top view of a display panel provided in an embodiment of this application;

[0059] Figure 3 This is a partial cross-sectional view of the display panel in another embodiment;

[0060] Figure 4 This is a partial cross-sectional view of the display panel in yet another embodiment;

[0061] Figure 5 This is a partial cross-sectional view of the display panel in another embodiment;

[0062] Figure 6 This is a partial cross-sectional view of the display panel in another embodiment;

[0063] Figure 7 This is a partial cross-sectional view of the display panel in another embodiment;

[0064] Figure 8This is a partial cross-sectional view of the display panel in another embodiment;

[0065] Figure 9 This is a partial cross-sectional view of the display panel in another embodiment;

[0066] Figure 10 This is a schematic diagram of a method for manufacturing a display panel according to an embodiment of this application.

[0067] Explanation of reference numerals in the attached figures:

[0068] 10. Display panel;

[0069] 100. Substrate;

[0070] 200. Isolation structure; 210. First layer; 220. Second layer; 230. Third layer; 240. Isolation opening; 241. First isolation opening; 242. Second isolation opening; 243. Third isolation opening;

[0071] 300, Light-emitting layer; 310, Light-emitting unit; 311, First light-emitting unit; 312, Second light-emitting unit; 313, Third light-emitting unit;

[0072] 400, First electrode layer; 410, First electrode;

[0073] 500, Light extraction unit; 501, First light extraction unit; 502, Second light extraction unit; 503, Third light extraction unit; 510, High-refractive-index layer; 520, Low-refractive-index layer;

[0074] 600, Pixel definition layer; 610, Pixel limiting part; 620, Pixel opening; 630, Second electrode;

[0075] 710, First encapsulation layer; 711, Encapsulation unit; 720, Second encapsulation layer; 730, Third encapsulation layer. Detailed Implementation

[0076] 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.

[0077] 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.

[0078] 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.

[0079] This application provides a display panel, a display device, and a method for manufacturing a display panel. The following description, in conjunction with the accompanying drawings, will illustrate various embodiments of the display panel, the display device, and the method for manufacturing a display panel.

[0080] This application provides a display panel, which may be an organic light-emitting diode (OLED) display panel.

[0081] Please refer to the following: Figures 1 to 6 , Figure 1 This is a partial cross-sectional view of a display panel provided in an embodiment of this application; Figure 2 This is a partial top view of a display panel provided in an embodiment of this application; Figure 3 This is a partial cross-sectional view of the display panel in another embodiment; Figure 4 This is a partial cross-sectional view of the display panel in yet another embodiment; Figure 5 This is a partial cross-sectional view of the display panel in another embodiment; Figure 6 This is a partial cross-sectional view of the display panel in another embodiment.

[0082] like Figures 1 to 6The first aspect of this application provides a display panel 10, which includes: a substrate 100; an isolation structure 200 located on the substrate 100, the isolation structure 200 enclosing a plurality of isolation openings 240; a light-emitting layer 300 located on the substrate 100, the light-emitting layer 300 including a plurality of light-emitting units 310, at least a portion of the light-emitting units 310 being located within a corresponding isolation opening 240; and at least one light extraction structure located on at least one side of the plurality of light-emitting units 310 facing away from the substrate 100, the light extraction structure including a plurality of light extraction units 500 stacked together, the light extraction unit 500 including a high-refractive-index layer 510 and a low-refractive-index layer 520 located in the isolation opening 240, the low-refractive-index layer 520 being located on the side of the high-refractive-index layer 510 facing away from the substrate 100, and the refractive index of the high-refractive-index layer 510 being greater than the refractive index of the low-refractive-index layer 520.

[0083] According to an embodiment of this application, the display panel 10 includes a substrate 100, an isolation structure 200, a light-emitting layer 300, and at least one light extraction structure. The isolation structure 200 is disposed on the substrate 100 and forms a plurality of isolation openings 240 to isolate the light-emitting layer 300 to form mutually disconnected light-emitting units 310, thereby reducing crosstalk of charge carriers in the light-emitting layer 300, improving the display effect of the display panel 10, and the fabrication of the light-emitting units 310 can be carried out without the use of a precision mask, which can reduce the development and use of precision masks and reduce the manufacturing cost. At least one light extraction structure is located on at least one side of the plurality of light-emitting units 310 facing away from the substrate 100. The light extraction structure includes a plurality of stacked light extraction units 500. Each light extraction unit 500 includes a high-refractive-index layer 510 and a low-refractive-index layer 520. The refractive index of the high-refractive-index layer 510 is greater than that of the low-refractive-index layer 520. The high-refractive-index layer 510 and the low-refractive-index layer 520 constitute a distributed Bragg reflector (DBR), which has a high light extraction effect and improves the light extraction efficiency of the display panel 10. At least a portion of the isolation opening 240 is provided with a plurality of stacked light extraction units 500, which can adaptively adjust the number of light extraction units 500 corresponding to different color light-emitting units 310 so that the light extraction efficiency corresponding to each color light-emitting unit 310 can be maximized, further improving the display effect and performance of the display panel 10.

[0084] When light passes through different media, it is reflected at the interface. The reflectivity is related to the refractive index between the media. Therefore, if we stack thin films with different refractive indices periodically, when light passes through these thin films with different refractive indices, the light reflected back from each layer will undergo constructive interference due to the change in phase angle, and then combine with each other to obtain strongly reflected light. By using the light extraction unit 500, i.e., DBR, we can reduce the reflection of light within a certain wavelength range, increase the amount of light transmitted, and improve the light extraction efficiency.

[0085] There are many other ways to arrange the substrate 100. For example, the substrate 100 may include a substrate and an array substrate disposed on the substrate. Alternatively, the substrate 100 may be the substrate itself. Or the substrate 100 may include a buffer layer and a support plate on the side facing away from the substrate.

[0086] like Figure 3 As shown, in some optional embodiments, the plurality of light-emitting units 310 include a first light-emitting unit 311 and a second light-emitting unit 312, and the plurality of isolation openings 240 include a first isolation opening 241 and a second isolation opening 242. The first light-emitting unit 311 is located in the first isolation opening 241, and the second light-emitting unit 312 is located in the second isolation opening 242. At least one light extraction structure includes a first light extraction structure and a second light extraction structure. The first light extraction structure is located on the side of the first light-emitting unit 311 facing away from the substrate 100, and the second light extraction structure is located on the side of the second light-emitting unit 312 facing away from the substrate 100. The first light extraction structure includes a first number of first light extraction units 501, and the second light extraction structure includes a second number of second light extraction units 502. The first number is not equal to the second number.

[0087] In these alternative embodiments, the first quantity is not equal to the second quantity. For example, the number of first light extraction units 501 provided in the first isolation opening 241 is greater, so that the light extraction efficiency of the first light emitting unit 311 in the first isolation opening 241 is further improved; or, the number of second light extraction units 502 provided in the second isolation opening 242 is greater, so that the light extraction efficiency of the second light emitting unit 312 in the second isolation opening 242 is further improved.

[0088] like Figure 5 As shown, in some optional embodiments, the plurality of light-emitting units 310 further include a third light-emitting unit 313, the plurality of isolation openings 240 further include a third isolation opening 243, the third light-emitting unit 313 is located in the third isolation opening 243, at least one light extraction structure includes a third light extraction structure, the third light extraction structure is located on the side of the third light-emitting unit 313 away from the substrate 100, the third light extraction structure includes a third number of third light extraction units 503, the first number is not equal to the third number.

[0089] In these alternative embodiments, the first quantity is not equal to the third quantity. For example, the number of second light extraction units 502 provided in the second isolation opening 242 is greater, so that the light extraction efficiency of the second light emitting unit 312 in the second isolation opening 242 is further improved; or, the number of third light extraction units 503 provided in the third isolation opening 243 is greater, so that the light extraction efficiency of the third light emitting unit 313 in the third isolation opening 243 is further improved.

[0090] like Figure 3 As shown, in some optional embodiments, the first quantity is not equal to the third quantity.

[0091] In these alternative embodiments, the first quantity is not equal to the third quantity. For example, the number of first light extraction units 501 provided in the first isolation opening 241 is greater, so that the light extraction efficiency of the first light emitting unit 311 in the first isolation opening 241 is further improved; or, the number of third light extraction units 503 provided in the third isolation opening 243 is greater, so that the light extraction efficiency of the third light emitting unit 313 in the third isolation opening 243 is further improved.

[0092] like Figure 5 and Figure 6 As shown, in some optional embodiments, the plurality of light-emitting units 310 include a first light-emitting unit 311 and a second light-emitting unit 312, and the plurality of isolation openings 240 include a first isolation opening 241 and a second isolation opening 242. The first light-emitting unit 311 is located in the first isolation opening 241, and the second light-emitting unit 312 is located in the second isolation opening 242. At least one light extraction structure includes a first light extraction structure and a second light extraction structure. The first light extraction structure is located on the side of the first light-emitting unit 311 facing away from the substrate 100, and the second light extraction structure is located on the side of the second light-emitting unit 312 facing away from the substrate 100. The first light extraction structure includes a first light extraction unit 501 with a first thickness, and the second light extraction structure includes a second light extraction unit 502 with a second thickness. The first thickness is not equal to the second thickness.

[0093] In these optional embodiments, the first thickness is not equal to the second thickness. For example, the thickness of the first light extraction unit 501 disposed in the first isolation opening 241 is greater; or, the thickness of the second light extraction unit 502 disposed in the second isolation opening 242 is greater. The thickness of the light extraction unit 500 is different from the thickness of the light extraction unit 500 in at least part of the isolation opening 240, and the wavelengths that can improve the light extraction efficiency are also different. Since the first light-emitting unit 311, the second light-emitting unit 312 and the third light-emitting unit 313 are different colors and have different wavelengths, in order to improve the light extraction efficiency of light with different wavelengths, the thickness of the light extraction unit 500 corresponding to the light-emitting unit 310 of different colors is adaptively adjusted so that the light extraction efficiency corresponding to each color light-emitting unit 310 can be maximized, thereby further improving the display effect and performance of the display panel 10.

[0094] Optionally, the plurality of light-emitting units 310 may further include a third light-emitting unit 313, and the plurality of isolation openings 240 may further include a third isolation opening 243. The third light-emitting unit 313 is located in the third isolation opening 243. At least one light extraction structure includes a third light extraction structure, which is located on the side of the third light-emitting unit 313 away from the substrate 100. The third light extraction structure includes a third light extraction unit 503 with a third thickness. The first thickness is not equal to the third thickness. For example, the thickness of the second light extraction unit 502 disposed in the second isolation opening 242 is greater; or, the thickness of the third light extraction unit 503 disposed in the third isolation opening 243 is greater.

[0095] like Figure 5 As shown, in some optional embodiments, the number of first light extraction units 501 and second light extraction units 502 is equal.

[0096] In these optional embodiments, when the number of the first light extraction unit 501 of the first isolation opening 241 and the second light extraction unit 502 of the second isolation opening 242 are equal, the thickness of the first light extraction unit 501 of the first isolation opening 241 and the second light extraction unit 502 of the second isolation opening 242 is adjusted by the control variable method so that the light extraction efficiency corresponding to the first light-emitting unit 311 and the second light-emitting unit 312 can be maximized, thereby further improving the display effect and performance of the display panel 10.

[0097] For example, in some alternative embodiments, the first thickness is less than the second thickness.

[0098] In these optional embodiments, the first thickness is less than the second thickness, that is, the thickness of the first light extraction unit 501 within the first isolation opening 241 is less than the thickness of the second light extraction unit 502 within the second isolation opening 242. The first light-emitting unit 311 is a red light-emitting unit 310, and the second light-emitting unit 312 is a green light-emitting unit 310. Since the wavelength of red light is greater than that of green light, setting the thickness of the second light extraction unit 502 within the second isolation opening 242 to be larger allows both the first light extraction unit 501 in the first isolation opening 241 and the second light extraction unit 502 in the second isolation opening 242 to have better light extraction efficiency.

[0099] In some alternative embodiments, the thickness of the high-refractive-index layer 510 within the first isolation opening 241 is less than that of the high-refractive-index layer 510 within the second isolation opening 242.

[0100] In these optional embodiments, the first light-emitting unit 311 is a red light-emitting unit 310, and the second light-emitting unit 312 is a green light-emitting unit 310. Since the wavelength of red light is greater than the wavelength of the filter, the thickness of the light extraction unit 500 in the second isolation opening 242 is set to be larger. The light extraction unit 500 is composed of a high-refractive layer 510 and a low-refractive layer 520. In order to increase the thickness of the light extraction unit 500, the thickness of the high-refractive layer 510 can be increased. Therefore, by setting the thickness of the high-refractive layer 510 in the second isolation opening 242 to be larger, the light extraction efficiency of the light extraction units 500 in both the first isolation opening 241 and the second isolation opening 242 can be improved.

[0101] In some alternative embodiments, the thickness of the low-refractive layer 520 within the first isolation opening 241 is less than that of the low-refractive layer 520 within the second isolation opening 242.

[0102] In these optional embodiments, the first light-emitting unit 311 is a red light-emitting unit 310, and the second light-emitting unit 312 is a green light-emitting unit 310. Since the wavelength of red light is greater than the wavelength of the filter, the thickness of the light extraction unit 500 in the second isolation opening 242 is set to be larger. The light extraction unit 500 is composed of a high-refractive layer 510 and a low-refractive layer 520. In order to increase the thickness of the light extraction unit 500, the thickness of the high-refractive layer 510 can be increased. Therefore, by setting the thickness of the low-refractive layer 520 in the second isolation opening 242 to be larger, the light extraction efficiency of the light extraction units 500 in both the first isolation opening 241 and the second isolation opening 242 can be improved.

[0103] like Figure 6 As shown, in some optional embodiments, the number of second light extraction units 502 in the second isolation opening 242 and the number of third light extraction units 503 in the third isolation opening 243 are equal.

[0104] In these optional embodiments, when the number of the second light extraction unit 502 in the second isolation opening 242 and the number of the third light extraction unit 503 in the third isolation opening 243 are equal, the thickness of the second light extraction unit 502 in the second isolation opening 242 and the third light extraction unit 503 in the third isolation opening 243 is adjusted by the control variable method so that the light extraction efficiency corresponding to the second light-emitting unit 312 and the third light-emitting unit 313 can be maximized, thereby further improving the display effect and performance of the display panel 10.

[0105] For example, in some alternative embodiments, the thickness of the second light extraction unit 502 within the second isolation opening 242 is less than that of the third light extraction unit 503 within the third isolation opening 243.

[0106] In these optional embodiments, the second light-emitting unit 312 is a green light-emitting unit 310, and the third light-emitting unit 313 is a blue light-emitting unit 310. Since the wavelength of green light is greater than that of blue light, the thickness of the third light extraction unit 503 in the third isolation opening 243 is set to be larger, which can improve the light extraction efficiency of both the second light extraction unit 502 in the second isolation opening 242 and the third light extraction unit 503 in the third isolation opening 243.

[0107] In some alternative embodiments, the thickness of the high-refractive-index layer 510 within the second isolation opening 242 is less than that of the high-refractive-index layer 510 within the third isolation opening 243.

[0108] In these optional embodiments, the second light-emitting unit 312 is a green light-emitting unit 310, and the third light-emitting unit 313 is a blue light-emitting unit 310. Since the wavelength of green light is greater than that of blue light, the thickness of the light extraction unit 500 in the third isolation opening 243 is set to be greater. The light extraction unit 500 is composed of a high-refractive-index layer 510 and a low-refractive-index layer 520. In order to increase the thickness of the light extraction unit 500, the thickness of the high-refractive-index layer 510 can be increased. Therefore, by setting the thickness of the high-refractive-index layer 510 in the third isolation opening 243 to be greater, the light extraction efficiency of the light extraction units 500 in both the second isolation opening 242 and the third isolation opening 243 can be improved.

[0109] In some alternative embodiments, the thickness of the low-refractive layer 520 within the second isolation opening 242 is less than that of the low-refractive layer 520 within the third isolation opening 243.

[0110] In these optional embodiments, the second light-emitting unit 312 is a green light-emitting unit 310, and the third light-emitting unit 313 is a blue light-emitting unit 310. Since the wavelength of green light is greater than that of blue light, the thickness of the light extraction unit 500 in the third isolation opening 243 is set to be greater. The light extraction unit 500 is composed of a high-refractive-index layer 510 and a low-refractive-index layer 520. In order to increase the thickness of the light extraction unit 500, the thickness of the high-refractive-index layer 510 can be increased. Therefore, by setting the thickness of the low-refractive-index layer 520 in the third isolation opening 243 to be greater, the light extraction efficiency of the light extraction units 500 in both the second isolation opening 242 and the third isolation opening 243 can be improved.

[0111] When the difference in refractive index between the high-refractive-index layer 510 and the low-refractive-index layer 520 becomes very small, the light travels as if in the same medium, and the reflection coefficient becomes very small. Due to the significant interference effect caused by multiple interferences of light, the light extraction capability of the DBR can be improved when the difference in refractive index between the high-refractive-index layer 510 and the low-refractive-index layer 520 in the DBR decreases.

[0112] In some alternative embodiments, the refractive index of the high-refractive layer 510 is 1.6 to 2.5, for example, the refractive index of the high-refractive layer 510 is 1.6, 2.0, 2.25, 2.5, etc.

[0113] In these optional embodiments, the refractive index of the high-refractive-index layer 510 is greater than or equal to 1.6. This improves the problem that if the refractive index of the high-refractive-index layer 510 is too low, it cannot be greater than the refractive index of the low-refractive-index layer 520, preventing the formation of a DBR between the high-refractive-index layer 510 and the low-refractive-index layer 520. Consequently, total internal reflection easily occurs when light reaches the light extraction unit 500, reducing the light extraction efficiency of the display panel 10. Conversely, if the refractive index of the high-refractive-index layer 510 is less than or equal to 2.5, it improves the problem that if the refractive index of the high-refractive-index layer 510 is too high, the refractive index difference between the high-refractive-index layer 510 and the low-refractive-index layer 520 becomes too large, reducing the light extraction effect of the DBR.

[0114] In some alternative embodiments, the refractive index of the low-refractive layer 520 is 1 to 1.5, for example, the refractive index of the high-refractive layer 510 is 1, 1.2, 1.3, 1.5, etc.

[0115] In these optional embodiments, the refractive index of the low-refractive layer 520 is greater than or equal to 1, which can improve the problem that the excessively low refractive index of the low-refractive layer 520 leads to an excessively large difference in refractive index between the high-refractive layer 510 and the low-refractive layer 520, resulting in a reduced light extraction effect of the DBR. The refractive index of the low-refractive layer 520 is less than or equal to 1.5, which can improve the problem that the excessively high refractive index of the low-refractive layer 520 prevents the high-refractive layer 510 from exceeding the refractive index of the low-refractive layer 520, making it impossible for the high-refractive layer 510 and low-refractive layer 520 to form a DBR. This results in total internal reflection easily occurring when light reaches the light extraction unit 500, reducing the light extraction efficiency of the display panel 10.

[0116] In some optional embodiments, the thickness of the high-refractive-index layer 510 within the first isolation opening 241 is 60nm to 80nm, for example, the thickness of the high-refractive-index layer 510 within the first isolation opening 241 is 60nm, 65nm, 70nm, 80nm, etc.

[0117] In these optional embodiments, the thickness of the high-refractive-index layer 510 within the first isolation opening 241 is between 60 nm and 80 nm, so that more red light emitted by the first light-emitting unit 311 within the first isolation opening 241 can pass through the high-refractive-index layer 510, thereby improving the light emission efficiency of the first light-emitting unit 311.

[0118] In some optional embodiments, the thickness of the low-refractive layer 520 within the first isolation opening 241 is 110nm to 130nm, for example, the thickness of the low-refractive layer 520 within the first isolation opening 241 is 110nm, 120nm, 125nm, 130nm, etc.

[0119] In these optional embodiments, the thickness of the low-refractive layer 520 within the first isolation opening 241 is between 110 nm and 130 nm, so that more red light emitted by the first light-emitting unit 311 within the first isolation opening 241 can pass through the low-refractive layer 520, thereby improving the light emission efficiency of the first light-emitting unit 311.

[0120] In some optional embodiments, the thickness of the high-refractive-index layer 510 within the second isolation opening 242 is 50 nm to 70 nm, for example, the thickness of the high-refractive-index layer 510 within the second isolation opening 242 is 50 nm, 60 nm, 65 nm, 70 nm, etc.

[0121] In these optional embodiments, the thickness of the high-refractive-index layer 510 within the second isolation opening 242 is between 50 nm and 70 nm, so that more green light emitted by the second light-emitting unit 312 within the second isolation opening 242 can pass through the high-refractive-index layer 510, thereby improving the light emission efficiency of the second light-emitting unit 312.

[0122] In some optional embodiments, the thickness of the low-refractive layer 520 within the second isolation opening 242 is 90nm to 110nm, for example, the thickness of the low-refractive layer 520 within the second isolation opening 242 is 90nm, 100nm, 105nm, 110nm, etc.

[0123] In these optional embodiments, the thickness of the low-refractive layer 520 within the second isolation opening 242 is between 90 nm and 110 nm, so that more green light emitted by the second light-emitting unit 312 within the second isolation opening 242 can pass through the low-refractive layer 520, thereby improving the light emission efficiency of the second light-emitting unit 312.

[0124] In some optional embodiments, the thickness of the high-refractive-index layer 510 within the third isolation opening 243 is 45nm to 60nm, for example, the thickness of the high-refractive-index layer 510 within the third isolation opening 243 is 45nm, 50nm, 55nm, 60nm, etc.

[0125] In these optional embodiments, the thickness of the high-refractive-index layer 510 within the third isolation opening 243 is between 45 nm and 60 nm, so that more blue light emitted by the third light-emitting unit 313 within the third isolation opening 243 can pass through the high-refractive-index layer 510, thereby improving the light emission efficiency of the third light-emitting unit 313.

[0126] In some optional embodiments, the thickness of the low-refractive layer 520 within the third isolation opening 243 is 80nm to 100nm, for example, the thickness of the low-refractive layer 520 within the third isolation opening 243 is 80nm, 85nm, 90nm, 100nm, etc.

[0127] In these optional embodiments, the thickness of the low-refractive layer 520 within the third isolation opening 243 is between 80 nm and 100 nm, so that more blue light emitted by the third light-emitting unit 313 within the third isolation opening 243 can pass through the low-refractive layer 520, thereby improving the light extraction efficiency of the third light-emitting unit 313.

[0128] In some alternative embodiments, the material of the high-refractive-index layer 510 includes at least one of a light-extracting material, titanium dioxide, and zinc sulfide.

[0129] Alternatively, low-refractive-index materials include at least one of lithium fluoride, silicon dioxide, and calcium fluoride.

[0130] In these optional embodiments, when the high-refractive-index layer 510 is made of a light-extracting material, the low-refractive-index layer 520 can be made of lithium fluoride; when the high-refractive-index layer 510 is made of titanium oxide, the low-refractive-index layer 520 can be made of silicon dioxide; when the high-refractive-index layer 510 is made of zinc sulfide, the low-refractive-index layer 520 can be made of calcium fluoride. When the high-refractive-index layer 510 and the low-refractive-index layer 520 are made of these materials, they can have a relatively matched refractive index to form a DBR, thereby improving the light extraction efficiency of the display panel 10.

[0131] Please see Figure 7 , Figure 7 This is a partial cross-sectional view of the display panel in another embodiment.

[0132] like Figure 7 As shown, in some optional embodiments, the display panel 10 further includes a first encapsulation layer 710 located on the side of the light extraction structure away from the substrate 100. The first encapsulation layer 710 includes an encapsulation portion 711 located in the isolation opening 240, and the encapsulation portion 711 is used to encapsulate the light-emitting unit 310.

[0133] In these alternative embodiments, the first encapsulation layer 710 includes spaced-apart encapsulation portions 711, at least a portion of which is located within the isolation opening 240 to encapsulate the light-emitting unit 310.

[0134] In some alternative embodiments, the thickness of the encapsulation portion 711 within at least some of the isolation openings 240 is different. For example, the thickness of the encapsulation portion 711 within at least two of the first isolation opening 241, the second isolation opening 242, and the third isolation opening 243 is different.

[0135] In these optional embodiments, by adjusting the thickness of the encapsulation portion 711 corresponding to each light-emitting unit 310, the thickness of the encapsulation portion 711 of the light-emitting unit 310 can be individually adjusted, thereby improving the light emission efficiency of each light-emitting unit 310 through the encapsulation portion 711. Furthermore, providing encapsulation portions 711 of different thicknesses also helps to improve the color shift phenomenon of the display panel 10.

[0136] In some alternative embodiments, the material of the first encapsulation layer 710 includes inorganic materials.

[0137] In these alternative embodiments, the first encapsulation layer 710 comprises an inorganic material, which has good density and good barrier properties against water vapor and oxygen.

[0138] Optionally, the display panel 10 further includes: a second encapsulation layer 720 located on the side of the first encapsulation layer 710 away from the substrate 100, and the second encapsulation layer 720 in contact with the isolation structure 200; and a third encapsulation layer 730 located on the side of the second encapsulation layer 720 away from the substrate 100. The display panel 10 employs a three-layer encapsulation, which has better encapsulation performance and reduces the possibility of water and oxygen intrusion.

[0139] Optionally, the material of the second encapsulation layer 720 may include organic materials.

[0140] Optionally, the material of the third encapsulation layer 730 may include inorganic materials. The first encapsulation layer 710, the second encapsulation layer 720, and the third encapsulation layer 730 are encapsulated using inorganic materials, organic materials, and inorganic materials, respectively, to form a TFE (Thin Film Encapsulation) encapsulation structure, further improving the encapsulation performance.

[0141] In some alternative embodiments, the display panel 10 further includes a first electrode layer 400, including a first electrode 410 located in the isolation opening 240, the first electrode 410 being located between the light-emitting unit 310 and the light extraction structure and electrically connected to the isolation structure 200.

[0142] In these optional embodiments, the isolation structure 200 isolates the first electrode layer 400 to form mutually spaced first electrodes 410. The mutually spaced first electrodes 410 are electrically connected through the isolation structure 200 to form a full-surface electrode, ensuring the normal light emission of the light-emitting unit 310.

[0143] Optionally, the orthographic projection of the light-emitting unit 310 onto the substrate 100 is located within the orthographic projection of the first electrode 410 onto the substrate 100. That is, the first electrode 410 covers the light-emitting unit 310 and serves as the electrode of the light-emitting unit 310, ensuring normal light emission of the light-emitting unit 310 and improving the display effect of the display panel 10. In some optional embodiments, the light-emitting unit 310 and the isolation structure 200 are spaced apart.

[0144] Optionally, the light-emitting unit 310 and the isolation structure 200 are spaced apart, that is, each light-emitting unit 310 is spaced apart from each other, which reduces the crosstalk of charge carriers between each light-emitting unit 310 and improves the color crosstalk problem of the light-emitting unit 310.

[0145] Optionally, the material of the first electrode 410 includes a transparent metal oxide, such as ITO or IZO. The transparent metal oxide can reduce the light loss of SPPs (surface plasmon polaritons) at the metal interface and further improve the light extraction efficiency of the display panel 10.

[0146] Optionally, the first layer 210 includes a conductive material, and the first layer 210 is connected to the first electrode 410 to achieve an electrical connection between the isolation structure 200 and the first electrode 410.

[0147] In some alternative embodiments, the second layer 220 includes a conductive material or an insulating material.

[0148] In these alternative embodiments, the second layer 220 includes a conductive material, such as a non-metallic conductive material or a metallic conductive material. When the second layer 220 is a non-metallic conductive material or an insulating material, it is difficult to etch the second layer 220 during the wet etching process of the first layer 210 with an etching solution, thereby making it easier for the first layer 210 to be recessed relative to the second layer 220.

[0149] In some alternative embodiments, both the first layer 210 and the second layer 220 comprise metallic materials, and the materials of the first layer 210 and the second layer 220 are different.

[0150] In these optional embodiments, when both the first layer 210 and the second layer 220 are made of metallic materials, the first layer 210 can be wet-etched using an etching solution. By adjusting the etching solution, the etching rate of the second layer 220 can be made lower than that of the first layer 210. Because the etching rate of the first layer 210 is higher, even if the second layer 220 is etched to some extent during wet etching, the first layer 210 is etched faster, thus making the first layer 210 recessed relative to the second layer 220.

[0151] Please see Figure 8 , Figure 8 This is a partial cross-sectional view of the display panel in another embodiment.

[0152] like Figure 8As shown, in some optional embodiments, the isolation structure 200 further includes a third layer 230 located on the side of the first layer 210 facing the substrate 100, wherein the orthographic projection of the first layer 210 onto the substrate 100 lies within the orthographic projection of the third layer 230 onto the substrate 100. The relevant content of the isolation structure 200 is described in patent applications PCT / CN2023 / 134518, 202310771124.9, 202311499823.9, and 202311616249.0, and is provided for reference.

[0153] In these optional embodiments, to obtain the recessed first layer 210, the first layer 210 has a faster etching rate than the second layer 220 and the third layer 230 during the etching process, thus forming the recessed first layer 210. Because the first layer 210 has a faster etching rate, more etching waste is generated and can easily enter other parts of the display panel 10, causing adverse effects. After the third layer 230 is formed, the first layer 210 can adhere better to the third layer 230, and the generated etching waste falls onto the third layer 230, making it easier to clean.

[0154] In these optional embodiments, the pixel defining portion 610 of the pixel defining layer 600 encloses a pixel opening 620 to accommodate the light-emitting unit 310, thereby enabling the light-emitting unit 310 to emit light normally. Furthermore, the pixel defining portion 610 defines the area for each light-emitting unit 310, reducing color mixing issues between the light-emitting units 310.

[0155] Optionally, the display panel 10 further includes a second electrode 630, which is exposed through the pixel opening 620. One of the second electrode 630 and the first electrode 410 serves as the anode of the light-emitting unit 310, and the other serves as the cathode of the light-emitting unit 310. This embodiment of the application illustrates this by using the second electrode 630 as the anode of the light-emitting unit 310 and the first electrode 410 as the cathode of the light-emitting unit 310.

[0156] Optionally, the light-emitting layer 300 includes an electron injection layer (EIL), an electron transport layer (ETL), a light-emitting material layer, a hole injection layer (HIL), and a hole transport layer (HTL). Adding a light extraction unit 500, i.e., a DBR structure, will change the wavelength and color of the emitted light. The wavelength and color of the emitted light can be maintained by adjusting the thickness of the electron transport layer (ETL) or the hole transport layer (HTL) within the light-emitting layer 300.

[0157] Please see Figure 9 , Figure 9 This is a partial cross-sectional view of the display panel in another embodiment.

[0158] like Figure 9As shown, a second aspect of this application provides a display panel 10, which includes: a substrate 100; a light-emitting layer 300 located on the substrate 100, the light-emitting layer 300 including a plurality of mutually spaced light-emitting units 310; and at least one light extraction structure located on at least one side of the plurality of light-emitting units 310 facing away from the substrate 100. The light extraction structure includes a plurality of light extraction units 500 stacked together, the light extraction unit 500 including a high-refractive-index layer 510 and a low-refractive-index layer 520, the low-refractive-index layer 520 being located on the side of the high-refractive-index layer 510 facing away from the substrate 100, and the refractive index of the high-refractive-index layer 510 being greater than the refractive index of the low-refractive-index layer 520.

[0159] According to an embodiment of this application, the display panel 10 includes a substrate 100, a light-emitting layer 300, and a light extraction structure. At least one light extraction structure is located on at least one side of the plurality of light-emitting units 310 facing away from the substrate 100. The light extraction structure includes a plurality of stacked light extraction units 500. Each light extraction unit 500 includes a high-refractive-index layer 510 and a low-refractive-index layer 520. The refractive index of the high-refractive-index layer 510 is greater than that of the low-refractive-index layer 520. The high-refractive-index layer 510 and the low-refractive-index layer 520 constitute a distributed Bragg reflector (DBR), which has a high light extraction effect and improves the light extraction efficiency of the display panel 10. At least a portion of the isolation opening 240 contains a plurality of stacked light extraction units 500, allowing for adaptive adjustment of the number of light extraction units 500 corresponding to different color light-emitting units 310. This maximizes the light extraction efficiency of each color light-emitting unit 310, further improving the display effect and performance of the display panel 10.

[0160] The structural design in this embodiment can be applied to other display panels 10. The specific choice can be made according to the actual situation, and this application does not impose any specific restrictions on it.

[0161] The third aspect of this application also provides a display device including the display panel 10 of any of the above embodiments. Since the display device provided in the third aspect of this application includes the display panel 10 of any of the above embodiments, it has the beneficial effects of the display panel 10 of any of the above embodiments, which will not be elaborated further here.

[0162] The display devices in this application 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.

[0163] Please see Figure 10 , Figure 10 This is a schematic diagram of a method for manufacturing a display panel according to an embodiment of this application.

[0164] The fourth aspect of this application also provides a method for manufacturing a display panel 10. The display panel 10 can be any of the display panels 10 provided in the above embodiments. Please refer to the embodiments for further details. Figures 1 to 9 The preparation methods include:

[0165] Step S01: An isolation structure is fabricated on the substrate, and the isolation structure encloses and forms multiple isolation openings.

[0166] Step S02: Prepare a light-emitting layer on the substrate. The light-emitting layer includes a plurality of light-emitting units, at least a portion of which are located within corresponding isolation openings.

[0167] Step S03: Prepare a light extraction structure on the side of the light-emitting layer away from the substrate. The light extraction structure includes multiple light extraction units stacked together. Each light extraction unit includes a high-refractive-index layer and a low-refractive-index layer. The low-refractive-index layer is located on the side of the high-refractive-index layer away from the substrate. The refractive index of the high-refractive-index layer is greater than that of the low-refractive-index layer.

[0168] According to the preparation method of the third aspect of this application, an isolation structure 200 is prepared in step S01. A light-emitting layer 300 is prepared in step S02. The isolation structure 200 is disposed on the substrate 100 and forms a plurality of isolation openings 240 to isolate the light-emitting layer 300 and form mutually disconnected light-emitting units 310, thereby reducing crosstalk of charge carriers in the light-emitting layer 300, improving the display effect of the display panel 10, and the preparation of the light-emitting units 310 does not require the use of a precision mask, which can reduce the development and use of precision masks and reduce the preparation cost. A light extraction structure is prepared in step S03. The light extraction structure includes a plurality of light extraction units 500 stacked together. The light extraction unit 500 includes a high-refractive-index layer 510 and a low-refractive-index layer 520. The refractive index of the high-refractive-index layer 510 is greater than that of the low-refractive-index layer 520. The high-refractive-index layer 510 and the low-refractive-index layer 520 constitute a distributed Bragg reflector (DBR), which has a high light extraction effect and improves the light extraction efficiency of the display panel 10. At least a portion of the isolation opening 240 is provided with multiple stacked light extraction units 500, which can adaptively adjust the number of light extraction units 500 corresponding to different color light-emitting units 310, so that the light extraction efficiency of each color light-emitting unit 310 can be maximized, thereby further improving the display effect and performance of the display panel 10.

[0169] 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; An isolation structure is located on the substrate, and the isolation structure encloses and forms a plurality of isolation openings; A light-emitting layer is located on the substrate, the light-emitting layer includes a plurality of light-emitting units, at least a portion of the light-emitting units being located within the corresponding isolation opening; At least one light extraction structure is located on at least one side of the plurality of light-emitting units facing away from the substrate. The light extraction structure includes a plurality of light extraction units stacked together. Each light extraction unit includes a high-refractive-index layer and a low-refractive-index layer. The low-refractive-index layer is located on the side of the high-refractive-index layer facing away from the substrate. The refractive index of the high-refractive-index layer is greater than that of the low-refractive-index layer. The plurality of light-emitting units include a first light-emitting unit and a second light-emitting unit, the plurality of isolation openings include a first isolation opening and a second isolation opening, the first light-emitting unit is located in the first isolation opening, the second light-emitting unit is located in the second isolation opening, and the at least one light extraction structure includes a first light extraction structure and a second light extraction structure, the first light extraction structure is located on the side of the first light-emitting unit away from the substrate, and the second light extraction structure is located on the side of the second light-emitting unit away from the substrate. The first light extraction structure includes a first light extraction unit with a first thickness, and the second light extraction structure includes a second light extraction unit with a second thickness, wherein the first thickness is not equal to the second thickness.

2. The display panel according to claim 1, characterized in that, The plurality of light-emitting units include a first light-emitting unit and a second light-emitting unit, the plurality of isolation openings include a first isolation opening and a second isolation opening, the first light-emitting unit is located in the first isolation opening, the second light-emitting unit is located in the second isolation opening, and the at least one light extraction structure includes a first light extraction structure and a second light extraction structure, the first light extraction structure is located on the side of the first light-emitting unit away from the substrate, and the second light extraction structure is located on the side of the second light-emitting unit away from the substrate. The first optical extraction structure includes a first number of first optical extraction units, and the second optical extraction structure includes a second number of second optical extraction units, wherein the first number is not equal to the second number.

3. The display panel according to claim 2, characterized in that, The plurality of light-emitting units further includes a third light-emitting unit, and the plurality of isolation openings further includes a third isolation opening. The third light-emitting unit is located in the third isolation opening. The at least one light extraction structure includes a third light extraction structure. The third light extraction structure is located on the side of the third light-emitting unit away from the substrate. The third light extraction structure includes a third number of third light extraction units, and the first number is not equal to the third number.

4. The display panel according to claim 3, characterized in that, The second quantity is not equal to the third quantity.

5. The display panel according to claim 1, characterized in that, The plurality of light-emitting units further includes a third light-emitting unit, and the plurality of isolation openings further includes a third isolation opening. The third light-emitting unit is located in the third isolation opening. The at least one light extraction structure includes a third light extraction structure, which is located on the side of the third light-emitting unit away from the substrate. The third light extraction structure includes a third light extraction unit with a third thickness, and the first thickness is not equal to the third thickness.

6. The display panel according to claim 5, characterized in that, The second thickness is not equal to the third thickness.

7. The display panel according to claim 1, characterized in that, The number of the first light extraction unit and the number of the second light extraction unit are equal.

8. The display panel according to claim 1, characterized in that, The first thickness is less than the second thickness.

9. The display panel according to claim 1, characterized in that, The thickness of the high-refractive layer within the first isolation opening is less than that of the high-refractive layer within the second isolation opening.

10. The display panel according to claim 1, characterized in that, The thickness of the low-refractive layer within the first isolation opening is less than that within the second isolation opening.

11. The display panel according to claim 5, characterized in that, The number of the second light extraction unit and the third light extraction unit are equal.

12. The display panel according to claim 5, characterized in that, The second thickness is less than the third thickness.

13. The display panel according to claim 5, characterized in that, The thickness of the high-refractive layer in the second isolation opening is less than that in the third isolation opening.

14. The display panel according to claim 5, characterized in that, The thickness of the low-refractive layer in the second isolation opening is less than that in the third isolation opening.

15. The display panel according to claim 1, characterized in that, The refractive index of the high-refractive layer is 1.6 to 2.

5.

16. The display panel according to claim 1, characterized in that, The refractive index of the low-refractive layer is 1 to 1.

5.

17. The display panel according to claim 1, characterized in that, The thickness of the high-refractive layer within the first isolation opening is 60 nm to 80 nm.

18. The display panel according to claim 1, characterized in that, The thickness of the low-refractive layer within the first isolation opening is 110 nm to 130 nm.

19. The display panel according to claim 1, characterized in that, The thickness of the high-refractive layer within the second isolation opening is 50 nm to 70 nm.

20. The display panel according to claim 1, characterized in that, The thickness of the low-refractive layer within the second isolation opening is 90 nm to 110 nm.

21. The display panel according to claim 5, characterized in that, The thickness of the high-refractive layer within the third isolation opening is 45 nm to 60 nm.

22. The display panel according to claim 5, characterized in that, The thickness of the low-refractive layer within the third isolation opening is 80 nm to 100 nm.

23. The display panel according to claim 1, characterized in that, The material of the high-refractive layer includes at least one of light extraction materials, titanium oxide, and zinc sulfide.

24. The display panel according to claim 1, characterized in that, The material of the low-refractive layer includes at least one of lithium fluoride, silicon dioxide, and calcium fluoride.

25. The display panel according to claim 5, characterized in that, Also includes: A first encapsulation layer is located on the side of the light extraction structure facing away from the substrate. The first encapsulation layer includes an encapsulation portion located in the isolation opening, the encapsulation portion being used to encapsulate the light-emitting unit.

26. The display panel according to claim 25, characterized in that, The thickness of the encapsulation portion within at least some of the isolation openings is different.

27. The display panel according to claim 25, characterized in that, The thickness of the encapsulation portion is different in at least two of the first isolation opening, the second isolation opening, and the third isolation opening.

28. The display panel according to claim 25, characterized in that, The material of the first encapsulation layer includes inorganic materials.

29. The display panel according to claim 25, characterized in that, The display panel also includes: The second encapsulation layer is located on the side of the first encapsulation layer that is away from the substrate; The third encapsulation layer is located on the side of the second encapsulation layer that is away from the substrate.

30. The display panel according to claim 29, characterized in that, The material of the second encapsulation layer includes organic materials.

31. The display panel according to claim 29, characterized in that, The material of the third encapsulation layer includes inorganic materials.

32. The display panel according to claim 1, characterized in that, The display panel also includes: The first electrode layer includes a first electrode located at the isolation opening, the first electrode being located between the light-emitting unit and the light extraction structure and electrically connected to the isolation structure.

33. The display panel according to claim 32, characterized in that, The light-emitting unit is projected onto the substrate in a direction within the projection of the first electrode onto the substrate.

34. The display panel according to claim 1, characterized in that, The light-emitting unit is spaced apart from the isolation structure.

35. The display panel according to claim 32, characterized in that, The material of the first electrode includes a transparent metal oxide.

36. The display panel according to claim 1, characterized in that, The isolation structure includes a first layer and a second layer, the second layer being located on the side of the first layer away from the substrate, and the orthographic projection of the first layer onto the substrate being within the orthographic projection of the second layer onto the substrate.

37. The display panel according to claim 36, characterized in that, The first layer comprises a conductive material.

38. The display panel according to claim 36, characterized in that, The second layer comprises a conductive material or an insulating material.

39. The display panel according to claim 36, characterized in that, Both the first layer and the second layer comprise metallic materials, and the materials of the first layer and the second layer are different.

40. The display panel according to claim 36, characterized in that, The isolation structure further includes a third layer located on the side of the first layer facing the substrate, wherein the orthographic projection of the first layer onto the substrate is within the orthographic projection of the third layer onto the substrate.

41. The display panel according to claim 1, characterized in that, The display panel also includes: A pixel definition layer is located on the substrate. The pixel definition layer includes a pixel defining portion and a pixel opening formed by the pixel defining portion. The pixel opening and the isolation opening are in communication.

42. The display panel according to claim 41, characterized in that, The display panel further includes a second electrode, which is located between the substrate and the pixel definition layer and is exposed through the pixel opening.

43. A display panel, characterized in that, The display panel includes: substrate; A light-emitting layer is located on the substrate, and the light-emitting layer includes a plurality of light-emitting units; At least one light extraction structure is located on at least one side of the plurality of light-emitting units facing away from the substrate. The light extraction structure includes a plurality of light extraction units stacked together. Each light extraction unit includes a high-refractive-index layer and a low-refractive-index layer. The low-refractive-index layer is located on the side of the high-refractive-index layer facing away from the substrate. The refractive index of the high-refractive-index layer is greater than that of the low-refractive-index layer.

44. A display device, characterized in that, Includes the display panel as described in any one of claims 1-43.

45. A method for manufacturing a display panel, characterized in that, include: An isolation structure is fabricated on a substrate, the isolation structure enclosing and forming a plurality of isolation openings; A light-emitting layer is prepared on the substrate, the light-emitting layer comprising a plurality of light-emitting units, at least a portion of the light-emitting units being located within the corresponding isolation opening; A light extraction structure is fabricated on the side of the light-emitting layer facing away from the substrate. The light extraction structure includes a plurality of stacked light extraction units. Each light extraction unit includes a high-refractive-index layer and a low-refractive-index layer. The low-refractive-index layer is located on the side of the high-refractive-index layer facing away from the substrate, and the refractive index of the high-refractive-index layer is greater than that of the low-refractive-index layer. The plurality of light-emitting units include a first light-emitting unit and a second light-emitting unit. The plurality of isolation openings include a first isolation opening and a second isolation opening. The first light-emitting unit is located at the first isolation opening, and the second light-emitting unit is located at the second isolation opening. At least one of the light extraction structures includes a first light extraction structure and a second light extraction structure. The first light extraction structure is located on the side of the first light-emitting unit facing away from the substrate, and the second light extraction structure is located on the side of the second light-emitting unit facing away from the substrate. The first light extraction structure includes a first light extraction unit of a first thickness, and the second light extraction structure includes a second light extraction unit of a second thickness. The first thickness is not equal to the second thickness.

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