Display panel

Abstract

This disclosure provides a display panel comprising: a substrate; a plurality of light-emitting devices located on one side of the substrate; each light-emitting device including at least one light-emitting layer; the plurality of light-emitting devices including a first material light-emitting device and a second material light-emitting device; the light-emitting layer of the first material light-emitting device comprising a phosphorescently assisted thermally activated sensitized fluorescent light-emitting material; the material of the light-emitting layer of the second material light-emitting device being different from the material of the light-emitting layer of the first material light-emitting device; and a plurality of first light-concentrating structures located on the side of the second material light-emitting device facing away from the substrate. Through the above structural configuration, differentiated light extraction can be achieved for different pixels, thereby improving light extraction efficiency, mitigating color shift at large viewing angles, reducing power consumption, and extending device lifespan.

Description

Technical Field

[0001] This disclosure relates to the field of semiconductor display technology, and more specifically to display panels. Background Technology

[0002] In the field of Organic Light-Emitting Diode (OLED) display panels, to present high-quality white light images and achieve long device lifespan, it is necessary to balance the luminous efficiency and aging characteristics of different color sub-pixels as much as possible. Related technologies typically employ different technical approaches to improve the luminous efficiency of OLED devices, aiming to achieve a balance and improvement in overall performance. However, the differences in luminous efficiency among different color sub-pixels constitute a bottleneck limiting the device lifespan under overall white light display conditions, meaning current display panels still cannot adequately meet the requirements. Summary of the Invention

[0003] In view of this, the present disclosure provides a display panel.

[0004] A first aspect of this disclosure provides a display panel, comprising: substrate; Multiple light-emitting devices are located on one side of a substrate; each light-emitting device includes at least one light-emitting layer; the multiple light-emitting devices include a first material light-emitting device and a second material light-emitting device; the light-emitting layer of the first material light-emitting device includes a phosphorescently assisted thermally activated sensitized fluorescent light-emitting material; the material of the light-emitting layer of the second material light-emitting device is different from the material of the light-emitting layer of the first material light-emitting device. Multiple first light-concentrating structures are located on the side of the second material light-emitting device away from the substrate.

[0005] In one embodiment, the emission wavelength of the first material light-emitting device is greater than the emission wavelength of the second material light-emitting device; The display panel also includes multiple second light-concentrating structures located on the side of the first material light-emitting device away from the substrate; the refractive index of the first light-concentrating structure is greater than the refractive index of the second light-concentrating structure; Alternatively, the first material light-emitting device may not have a lens on the side facing away from the substrate.

[0006] In one embodiment, along a direction parallel to the plane of the substrate, the distance by which the first light-concentrating structure extends beyond the effective area of ​​the second material light-emitting device is less than the distance by which the second light-concentrating structure extends beyond the effective area of ​​the first material light-emitting device.

[0007] In one embodiment, the first material light-emitting device includes a first light-emitting device and a second light-emitting device, wherein the emission wavelength of the first light-emitting device is greater than the emission wavelength of the second light-emitting device. Along a direction parallel to the plane of the substrate, the distance by which the second light-concentrating structure extends beyond the effective area of ​​the first light-emitting device is greater than the distance by which the second light-concentrating structure extends beyond the effective area of ​​the second light-emitting device. Preferably, the thickness of the first light-gathering structure is greater than or equal to 2 μm and less than or equal to 6 μm; and / or, the thickness of the second light-gathering structure is greater than or equal to 2 μm and less than or equal to 6 μm; Preferably, the distance by which the first light-concentrating structure extends beyond the effective area of ​​the second material light-emitting device is greater than or equal to 1 μm and less than or equal to 5 μm; and / or, the distance by which the second light-concentrating structure extends beyond the effective area of ​​the first material light-emitting device is greater than or equal to 1 μm and less than or equal to 5 μm.

[0008] In one embodiment, the display panel further includes: A pixel defining layer is located on one side of the substrate. The pixel defining layer encloses a plurality of pixel openings, including a first pixel opening and a second pixel opening. At least a portion of a first material light-emitting device is located in the first pixel opening, and at least a portion of a second material light-emitting device is located in the second pixel opening. The distance between the edge of the orthographic projection of the second light-concentrating structure on the substrate and the edge of the orthographic projection of the first pixel opening on the substrate is the first distance, and the distance between the edge of the orthographic projection of the first light-concentrating structure on the substrate and the edge of the orthographic projection of the second pixel opening on the substrate is the second distance. The first distance and the second distance are different. Preferably, the emission wavelength of the first material light-emitting device is greater than the emission wavelength of the second material light-emitting device; and the first distance is greater than the second distance.

[0009] In one embodiment, the first light-concentrating structure includes a first central region and a first edge region, the first edge region surrounding at least a portion of the first central region, and the orthogonal projection of the effective region of the second material light-emitting device onto the substrate is located within the orthogonal projection range of the first central region onto the substrate. The thickness of the first edge region is less than or equal to the thickness of the first central region; Preferably, the sidewall of the first light-concentrating structure is located in the first edge region, and the distance between the sidewall of the first light-concentrating structure and the substrate increases along the direction close to the first central region. Preferably, the sidewall of the first light-concentrating structure includes at least one arc shape; Preferably, the surface of the first central region on the side opposite to the substrate is parallel to the plane of the substrate.

[0010] In one embodiment, the sidewall of the first light-concentrating structure includes a first end and a second end, the first end being located on the side of the second end away from the substrate, and the first end being located on the side of the second end close to the first central region, and the angle between the line connecting the first end and the second end and the plane where the substrate is located is greater than or equal to 70° and less than or equal to 80°. Preferably, the display panel further includes a plurality of second light-concentrating structures located on the side of the first material light-emitting device away from the substrate; the second light-concentrating structure includes a second central region and a second edge region, the second edge region surrounding at least a portion of the second central region, and the orthographic projection of the effective area of ​​the first material light-emitting device on the substrate is located within the orthographic projection range of the second central region on the substrate. The sidewall of the second light-concentrating structure includes a third end and a fourth end. The third end is located on the side of the fourth end away from the substrate, and the third end is located on the side of the fourth end close to the second central region. The angle between the line connecting the third end and the fourth end and the plane of the substrate is greater than or equal to 70° and less than or equal to 80°. Preferably, the emission wavelength of the first material light-emitting device is greater than the emission wavelength of the second material light-emitting device; The angle between the line connecting the first end and the second end and the plane where the substrate is located is the first angle, and the angle between the line connecting the third end and the fourth end and the plane where the substrate is located is the second angle, which is smaller than the first angle. Preferably, the first material light-emitting device includes a first light-emitting device and a second light-emitting device, wherein the emission wavelength of the first light-emitting device is greater than the emission wavelength of the second light-emitting device; The second included angle corresponding to the first light-emitting device is smaller than the second included angle corresponding to the second light-emitting device.

[0011] In one embodiment, the display panel further includes an optical adhesive layer, and a first light-concentrating structure is located on the side of the optical adhesive layer closer to the substrate, wherein the refractive index of the first light-concentrating structure is greater than the refractive index of the optical adhesive layer. Preferably, along the direction away from the substrate, the first light-concentrating structure includes at least two stacked light-concentrating layers with different refractive indices for adjacent light-concentrating layers; Preferably, the thickness of the optical adhesive layer is greater than or equal to 3 μm and less than or equal to 12 μm.

[0012] In one embodiment, the light-emitting layer of the second material light-emitting device includes at least one of fluorescent light-emitting material, phosphorescent light-emitting material, thermally activated delayed fluorescence sensitized fluorescent light-emitting material, and phosphorescent-assisted thermally activated sensitized fluorescent light-emitting material; Preferably, the display panel further includes a touch structure located between the light-emitting device and the first light-concentrating structure.

[0013] A second aspect of this disclosure provides a display panel, including: substrate; Multiple light-emitting devices are located on one side of the substrate; the multiple light-emitting devices include a first material light-emitting device and a second material light-emitting device; Multiple light-concentrating structures are located on the side of the light-emitting device away from the substrate; the multiple light-concentrating structures include a first light-concentrating structure and a second light-concentrating structure; the orthographic projection of the first light-concentrating structure on the substrate overlaps with the orthographic projection of the second material light-emitting device on the substrate, and the orthographic projection of the second light-concentrating structure on the substrate overlaps with the orthographic projection of the first material light-emitting device on the substrate. Along a direction parallel to the plane of the substrate, the distance by which the first light-concentrating structure extends beyond the effective area of ​​the second material light-emitting device is different from the distance by which the second light-concentrating structure extends beyond the effective area of ​​the first material light-emitting device.

[0014] The display panel provided according to the first aspect of the present disclosure includes a first material light-emitting device, a second material light-emitting device, and a plurality of first light-concentrating structures. By setting the light-emitting layer of the first material light-emitting device to include a phosphorescently assisted thermally activated sensitized fluorescent light-emitting material, and the material of the light-emitting layer of the second material light-emitting device to be different, the differentiated design can achieve differentiated light extraction for different pixels. This can improve the intrinsic brightness and luminous efficiency of the light-emitting device while improving the overall white light efficiency of the display panel and extending the overall lifespan of the display panel. Attached Figure Description

[0015] Figure 1a This is a schematic cross-sectional view of the display panel in one embodiment of the present disclosure.

[0016] Figure 1b This is a schematic cross-sectional view of the display panel in one embodiment of the present disclosure.

[0017] Figure 2 This is a schematic cross-sectional view of the light-emitting functional layer in one embodiment of the present disclosure.

[0018] Figure 3 This is a schematic cross-sectional view of the display panel in another embodiment of the present disclosure.

[0019] Figure 4 This is a schematic cross-sectional view of the display panel in another embodiment of the present disclosure.

[0020] Figure 5 This is a schematic cross-sectional view of the display panel in another embodiment of the present disclosure.

[0021] Figure 6 This is a schematic cross-sectional view of the light-concentrating structure in one embodiment of the present disclosure.

[0022] Figure 7 This is a schematic cross-sectional view of the light-concentrating structure in another embodiment of the present disclosure.

[0023] Figure 8 This is a schematic cross-sectional view of the light-concentrating structure in another embodiment of the present disclosure.

[0024] Figure 9 This is a cross-sectional schematic diagram of the first and second light-concentrating structures in one embodiment of the present disclosure.

[0025] Figure 10 This is a schematic cross-sectional view of the display panel in another embodiment of the present disclosure.

[0026] Figure 11 This is a schematic cross-sectional view of the first, second, and third light-concentrating structures in one embodiment of the present disclosure.

[0027] Figure 12 This is a schematic diagram of a method for manufacturing a display panel in one embodiment of the present disclosure. Detailed Implementation

[0028] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0029] Furthermore, to better illustrate this disclosure, numerous specific details are set forth in the following detailed description. Those skilled in the art will understand that this disclosure can be practiced without certain specific details. In some instances, methods and means well-known to those skilled in the art have not been described in detail in order to highlight the main points of this disclosure.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0032] In display panels containing multiple light-emitting devices of different colors, a common technical solution to improve the overall luminous efficiency of the device is to uniformly set a light-concentrating structure for all light-emitting devices of different colors. Specifically, this solution involves depositing a thin film with a specific refractive index over the entire display area and patterning it to cover the light-emitting area of ​​each sub-pixel. The basic working principle is to utilize the refractive index difference between this light-concentrating structure and surrounding layers (such as planarization layers and encapsulation layers) to change the light emission path and reduce light loss due to total internal reflection. However, when this solution is applied to multi-color light-emitting systems with significant efficiency differences (for example, red and green devices utilize phosphorescence-assisted thermally activated delayed fluorescence sensitized fluorescence (pTSF) technology and have high internal quantum efficiencies, while blue devices are limited by material properties and have relatively low luminous efficiency), the display effect of the panel is not ideal. The main reason is that this scheme, in pursuit of process simplicity and structural symmetry, treats all color devices uniformly. However, its inherent design inevitably leads to insufficient compensation for differences in light extraction effects, and may even cause new problems. Specifically, in applications where the extraction efficiency of red, green, and blue light needs to be improved simultaneously to maximize the overall efficiency of white light, the bottleneck effect at the light output port is most significant because the intrinsic efficiency of blue light devices is the lowest. A focusing structure of uniform size and material cannot specifically address these issues, and ultimately, the overall lifespan and brightness of the device remain limited by blue light.

[0033] Through in-depth analysis, the inventors of this disclosure have discovered that the root causes of the aforementioned contradictions are multifaceted: 1. When light of different wavelengths propagates in media with different refractive indices, its refraction, scattering, and total internal reflection characteristics have inherent differences. A fixed focusing structure design cannot simultaneously and perfectly match the optical behavior of all colors. 2. The focusing structures in related technologies typically have a uniform lateral dimension (i.e., the outward expansion relative to the pixel opening). This makes it impossible to differentiate and adjust according to the actual light field distribution of each color emitter, resulting in difficulty in simultaneously optimizing the capture efficiency of long-wavelength light (such as red light) and the gain effect of short-wavelength light (such as blue light). 3. The uniform optimization scheme limits the flexibility of adjusting the light extraction efficiency of each color sub-pixel through physical structure, and cannot finely compensate for the imbalance in lifetime and brightness caused by differences in luminous efficiency.

[0034] In view of the above, the first aspect of this disclosure provides a display panel. Referring to the cross-sectional structural schematic diagram shown in FIG1, the display panel includes: a substrate 100, a plurality of light-emitting devices 200 and a plurality of first light-concentrating structures 510.

[0035] For example, a plurality of light-emitting devices 200 are located on one side of the substrate 100; the plurality of light-emitting devices 200 include at least one light-emitting layer, and the plurality of light-emitting devices 200 include a first material light-emitting device 200a and a second material light-emitting device 200b. The light-emitting layer of the first material light-emitting device 200a includes a phosphorescently assisted thermally activated sensitized fluorescent light-emitting material; the material of the light-emitting layer of the second material light-emitting device 200b is different from the material of the light-emitting layer of the first material light-emitting device 200a; the first light-concentrating structure 510 is located on the side of the second material light-emitting device 200b facing away from the substrate 100.

[0036] The inventors discovered that single thermally activated sensitized fluorescent materials (TADF) do not fully utilize triplet excitons, while single phosphorescent materials have a short lifespan. By combining the two, the phosphorescent material enhances the triplet exciton utilization rate, while the TADF material leverages its high exciton utilization advantage. The resulting phosphorescent-assisted thermally activated sensitized fluorescent material (pTSF) significantly improves the intrinsic brightness and luminous efficiency of light-emitting devices. Furthermore, pTSF exhibits spectral stability, high color purity, and good compatibility with differentiated optical structures, further optimizing image color performance and color uniformity across the entire viewing angle. Meanwhile, the light-emitting layer of the first material light-emitting device 200a in this design includes pTSF, and the material of the light-emitting layer of the second material light-emitting device 200b is different. For example, the light-emitting layer of the blue sub-pixel cannot achieve the same level of efficiency improvement as red and green light due to the limitations of the material system. By setting the first light-concentrating structure 510 on the side of the second material light-emitting device 200b away from the substrate 100, the luminous efficiency of the second material light-emitting device 200b (blue light-emitting device) can be improved, and the lifespan of the second light-emitting device 200b can be extended. Furthermore, the overall white light efficiency of the display panel can be improved, and the overall lifespan of the display panel can be extended.

[0037] It should be noted that the material of the light-emitting layer of the second material light-emitting device 200b is different from that of the light-emitting layer of the first material light-emitting device 200a. This means that the material of the light-emitting layer of the second material light-emitting device 200b does not use phosphorescently assisted thermally activated sensitized fluorescent light-emitting material. For example, the material of the light-emitting layer of the second material light-emitting device 200b includes at least one of fluorescent light-emitting material, phosphorescent light-emitting material and thermally activated delayed fluorescence sensitized fluorescent light-emitting material.

[0038] For example, the orthographic projection of the first light-concentrating structure 510 on the substrate 100 is spaced apart from the orthographic projection of the first material light-emitting device 200a on the substrate 100.

[0039] It is understandable that the orthographic projection of the first light-concentrating structure 510 on the substrate 100 overlaps with the orthographic projection of the second material light-emitting device 200b on the substrate 100.

[0040] like Figure 2 As shown, the light-emitting functional layer 212 includes a hole injection layer HIL, a hole transport layer HTL, an electron blocking layer EBL, a light-emitting layer EML, a hole blocking layer HBL, an electron transport layer ETL, and an electron injection layer EIL stacked along the direction away from the substrate 100.

[0041] It is understood that, due to limitations in blue light materials, the first focusing structure 510 can be provided only on the side of the blue light-emitting device facing away from the substrate 100 to improve white light efficiency and extend the lifespan of the blue light-emitting device. Exemplarily, no lens is provided on the side of the first material light-emitting device 200a facing away from the substrate 100. In a specific example, the first focusing structure 510 is provided on the side of the blue light-emitting device facing away from the substrate 100, while no focusing structure or lens is provided on the side of the red light-emitting device and / or the green light-emitting device facing away from the substrate 100. To further improve light extraction efficiency and extend device lifespan, the first focusing structure 510 can be provided on the side of the blue light-emitting device facing away from the substrate 100, and a second focusing structure 520 can be provided on the side of the red light-emitting device and / or the green light-emitting device facing away from the substrate 100.

[0042] In one embodiment, refer to Figure 3 As shown, the emission wavelength of the first material light-emitting device 200a is greater than that of the second material light-emitting device 200b. The display panel also includes a plurality of second light-concentrating structures 520 located on the side of the first material light-emitting device 200a facing away from the substrate 100. Exemplarily, the orthographic projection of the second light-concentrating structure 520 onto the substrate 100 overlaps with the orthographic projection of the first material light-emitting device 200a onto the substrate 100. The refractive index of the first light-concentrating structure 510 is higher than that of the second light-concentrating structure 520. In one embodiment, along a direction parallel to the plane of the substrate 100, the distance by which the first light-concentrating structure 510 extends beyond the effective area of ​​the second material light-emitting device 200b is different from the distance by which the second light-concentrating structure 520 extends beyond the effective area of ​​the first material light-emitting device 200a. By setting different sizes of first focusing structure 510 and second focusing structure 520 (i.e., different distances extending from the effective area) on light-emitting devices 200 of different colors, the inherent differences in luminous efficiency between light-emitting devices 200 of different colors can be specifically compensated, thereby balancing the light output efficiency of each color sub-pixel, improving the overall luminous efficiency of the white light image of the device, and extending the overall lifespan of the device based on the lifespan limited by inefficient light-emitting devices.

[0043] It is understood that the light-emitting device 200 includes an effective region E, which generally refers to the area in the light-emitting device 200 actually used to generate and emit light. For example, it may include, but is not limited to, the light-emitting layer region defined by the pixel defining layer opening, the electrode overlap region of the light-emitting device 200, or combinations thereof. For example, the effective region E typically coincides substantially with the orthographic projection of the pixel opening onto the substrate 100. For example, the location of the effective region E can be referenced... Figure 3 The portion of the light-emitting device 200 is enclosed in dashed lines.

[0044] For example, the orthographic projection of the effective region E on the substrate 100 completely coincides with the orthographic projection of the corresponding pixel opening on the substrate 100.

[0045] For example, such as Figure 3 As shown, along a direction parallel to the plane of the substrate 100, the distance by which the first light-concentrating structure 510 extends beyond the effective region E of the second material light-emitting device 200b is L1, and the distance by which the second light-concentrating structure 520 extends beyond the effective region E of the first material light-emitting device 200a is L2, where L1 is less than L2. For example, the first material light-emitting device 200a emits red light, and the second material light-emitting device 200b emits blue light; or, the first material light-emitting device 200a emits green light, and the second material light-emitting device 200b emits blue light. Long-wavelength light, such as red light, has strong diffraction ability, and the light is more easily scattered at large angles in all directions. A large amount of light escapes from the sides of the pixels and the gaps between adjacent pixels, resulting in low brightness and high light loss on the front side; it is also more susceptible to interference from stray light from adjacent pixels, resulting in color crosstalk and blurry images; when viewed at large angles, its light attenuation is more severe than that of relatively short-wavelength light, leading to color cast and uneven color temperature in the image. Short-wavelength light, such as blue light, has weak diffraction ability, more concentrated light emission, less lateral diffusion, and lower light loss. However, it is more sensitive to absorption and loss by optical structures, making it more prone to additional losses. To address these issues, the inventors proposed a differentiated design of a first focusing structure 510 and a second focusing structure 520. Longer-wavelength light emitters are adapted to the second focusing structure 520 with a larger extension, while shorter-wavelength light emitters are adapted to the first focusing structure 510 with a smaller extension. On the one hand, this significantly improves the frontal light emission efficiency and brightness of long-wavelength light, effectively blocking stray light from adjacent pixels, suppressing color crosstalk between long-wavelength light pixels, and precisely compensating for the viewing angle attenuation of long-wavelength light. On the other hand, it can also gather a small amount of lateral stray light from short-wavelength light without causing additional light absorption due to an overly large structure, ensuring the luminous efficiency of short-wavelength light; and it can avoid excessive focusing leading to an excessively narrow light emission angle for short-wavelength light, preventing the problem of a very bright image from the front and a rapidly darkening image from the side. This solution addresses the optical defects of different wavelengths of light, matching appropriate focusing sizes for different wavelengths of light, improving the utilization rate of light from different pixels, and enhancing the overall light extraction efficiency of the panel.

[0046] For example, such as Figure 4 a and Figure 4 As shown in b, the first material light-emitting device 200a includes a first light-emitting device 2001 and a second light-emitting device 2002. The emission wavelength of the first light-emitting device 2001 is greater than the emission wavelength of the second light-emitting device 2002. Along the direction parallel to the plane where the substrate 100 is located, the distance by which the second light-concentrating structure 520 extends out of the effective area of ​​the first light-emitting device 2001 is H1, and the distance by which the second light-concentrating structure 520 extends out of the effective area of ​​the second light-emitting device 2002 is H2. H1 is greater than H2.

[0047] For example, the first light-emitting device 2001 emits red light and the second light-emitting device 2002 emits green light.

[0048] For example, the thickness of the first focusing structure 510 is greater than or equal to 2 μm and less than or equal to 6 μm; and / or, the thickness of the second focusing structure 520 is greater than or equal to 2 μm and less than or equal to 6 μm. For instance, the thickness of the first focusing structure 510 can be 2 μm, 3 μm, 4 μm, 5 μm, or 6 μm; the thickness of the second focusing structure 520 can be 2 μm, 3 μm, 4 μm, 5 μm, or 6 μm. This provides sufficient space for refraction and collimation of light while avoiding increased processing complexity and material costs due to excessive thickness.

[0049] For example, the distance by which the first focusing structure 510 extends beyond the effective area of ​​the second material light-emitting device 200b is greater than or equal to 1 μm and less than or equal to 5 μm; and / or, the distance by which the second focusing structure 520 extends beyond the effective area of ​​the first material light-emitting device 200a is greater than or equal to 1 μm and less than or equal to 5 μm. For instance, the distance by which the first focusing structure 510 extends beyond the effective area of ​​the second material light-emitting device 200b can be 1 μm, 3 μm, 4 μm, or 5 μm; the distance by which the second focusing structure 520 extends beyond the effective area of ​​the first material light-emitting device 200a can be 1 μm, 3 μm, 4 μm, or 5 μm. When the distance by which the focusing structure extends beyond the effective area of ​​its corresponding light-emitting device 200 is within the above range, on the one hand, it can accurately cover the lateral scattering light range of long-wavelength light-emitting devices, significantly improving the front light extraction efficiency and reducing panel driving power consumption; on the other hand, it can effectively suppress light crosstalk between adjacent pixels without sacrificing the panel's viewing angle, improving the image clarity and color uniformity of the high-resolution panel across all viewing angles. Meanwhile, this size range is fully compatible with existing semiconductor manufacturing processes, enabling stable mass production, improving product yield and long-term reliability, and balancing optical performance, image quality, and mass production feasibility. If the extension distance is less than 1μm, the light extraction effect is not significant; if the extension distance is greater than 5μm, it may increase the risk of optical crosstalk between adjacent pixels and occupy too much non-light-emitting area, reducing the panel's aperture ratio.

[0050] In one embodiment, refer to Figure 5 The display panel further includes: a pixel defining layer 400 located on one side of the substrate 100, the pixel defining layer 400 enclosing a plurality of pixel openings, the plurality of pixel openings including a first pixel opening 411 and a second pixel opening 412, at least a portion of a first material light-emitting device 200a being located in the first pixel opening 411, and at least a portion of a second material light-emitting device 200b being located in the second pixel opening 412; the distance between the edge of the orthographic projection of the second light-concentrating structure 520 on the substrate 100 and the edge of the orthographic projection of the first pixel opening 411 on the substrate 100 is a first distance K1, and the distance between the edge of the orthographic projection of the first light-concentrating structure 510 on the substrate 100 and the edge of the orthographic projection of the second pixel opening 412 on the substrate 100 is a second distance K2; K1 and K2 are different. This solution sets up a pixel delimiting layer to enclose and form independent first pixel openings 411 and second pixel openings 412, achieving physical isolation and boundary definition of the light-emitting area; the relative size of the light-concentrating structure and the pixel openings is defined by the orthogonal projection spacing on the substrate 100, and the first distance and the second distance are set to different values ​​by combining the differences in the emission wavelength and light scattering characteristics of the two types of light-emitting devices, which can effectively gather scattered light, improve light extraction efficiency, and reduce panel power consumption; at the same time, it suppresses light crosstalk between pixels and improves color uniformity and image clarity across the entire viewing angle.

[0051] It can be understood that the distance between the edge of the orthographic projection of the second light-concentrating structure 520 on the substrate 100 and the edge of the orthographic projection of the first pixel opening 411 on the substrate 100 is equal to the distance by which the second light-concentrating structure 520 extends out of the effective area E of the first material light-emitting device 200a; the distance between the edge of the orthographic projection of the first light-concentrating structure 510 on the substrate 100 and the edge of the orthographic projection of the second pixel opening 412 on the substrate 100 is equal to the distance by which the first light-concentrating structure 510 extends out of the effective area E of the second material light-emitting device 200b.

[0052] It is understandable that defining the process based on pixel apertures provides a clear alignment benchmark for the manufacturing process, ensuring that the light-concentrating structure can accurately cover the corresponding light-emitting device.

[0053] For example, the emission wavelength of the first material light-emitting device 200a is greater than the emission wavelength of the second material light-emitting device 200b; the first distance K1 is greater than the second distance K2.

[0054] In one embodiment, see Figure 6The first focusing structure 510 includes a first central region Z1 and a first edge region B1. The first edge region B1 surrounds at least a portion of the first central region Z1. The orthographic projection of the effective area of ​​the second material light-emitting device 200b on the substrate 100 is located within the orthographic projection range of the first central region Z1 on the substrate 100. The thickness of the first edge region B1 is less than or equal to the thickness of the first central region Z1. Through the above configuration, the edge is thinned to avoid excessive side thickness, which would increase the optical path and light absorption loss. This allows the direct light and small-angle scattered light emitted from the effective area of ​​the light-emitting device to be incident perpendicularly or at a small angle into the central thick region, relying on the thicker optical medium to complete the light path convergence and ensure the front light emission efficiency. Meanwhile, the large-angle stray light that disperses to all directions is incident into the thin region of the outer edge. The thin structure can change the incident angle of the light, and the side stray light is bent to the front viewing direction of the panel by interface refraction and total internal reflection, thus achieving light focusing.

[0055] For example, see Figure 6 The surface of the first central region Z1 facing away from the substrate 100 is parallel to the plane of the substrate 100. The sidewall of the first focusing structure 510 is located in the first edge region B1. Along the direction close to the first central region Z1, the distance between the sidewall of the first focusing structure 510 and the substrate 100 increases. This arrangement forms a combination of a planar main light-emitting area and an inclined focusing area in the first focusing structure 510. Specifically, the first central region Z1 is responsible for the efficient extraction of direct light, and the inclined surface of the first edge region B1 is responsible for gathering large-angle scattered light, thus completing the optical path control by partitioning.

[0056] For example, refer to Figure 7 The sidewall of the first light-concentrating structure 510 includes at least one arc shape, for example, the arc-shaped opening is close to the central area. The arc shape causes the light to form a diffuse reflection-like effect on the sidewall of the first light-concentrating structure 510, which can avoid stray light and glare caused by intense light reflection, resulting in more uniform light output and a softer image.

[0057] In one embodiment, see Figure 8 The sidewall of the first light-concentrating structure 510 includes a first end and a second end. The first end is located on the side of the second end away from the substrate, and the first end is located on the side of the second end closer to the first central region Z1. The angle between the line connecting the first end and the second end and the plane of the substrate 100 is greater than or equal to 70° and less than or equal to 80° (for example, it can be 70°, 72°, 74°, 76°, 78°, 80°, etc.). With the angle within the above range, the first light-concentrating structure 510 can ensure sufficient light concentration while avoiding total internal reflection of light on the sidewall due to excessively steep sidewalls (close to 90°) or excessive lateral space occupied by excessively flat sidewalls.

[0058] For example, the display panel further includes a plurality of second light-concentrating structures 520 located on the side of the first material light-emitting device 200a away from the substrate 100; the second light-concentrating structure 520 includes a second central region Z2 and a second edge region B2, the second edge region B2 surrounds at least part of the second central region Z2, the orthographic projection of the effective area of ​​the first material light-emitting device 200a on the substrate 100 is within the orthographic projection range of the second central region Z2 on the substrate; the sidewall of the second light-concentrating structure 520 includes a third end and a fourth end, the third end is located on the side of the fourth end away from the substrate, and the third end is located on the side of the fourth end close to the second central region, the angle between the line connecting the third end and the fourth end and the plane of the substrate is greater than or equal to 70° and less than or equal to 80°.

[0059] For example, refer to Figure 9 The emission wavelength of the first material light-emitting device 200a is greater than that of the second material light-emitting device 200b. The first angle between the line connecting the first and second ends of the first focusing structure 510 and the plane of the substrate 100 is j1, and the second angle between the line connecting the third and fourth ends of the second focusing structure 520 and the plane of the substrate 100 is j2, where j1 is greater than j2. The longer the wavelength, the greater the lateral scattering angle of the light, and the wider the distribution range of stray light. A smaller angle between the sidewall relative to the line connecting the two ends and the substrate is used; that is, a gentler sidewall slope can cover a larger range of laterally scattered light, converging large-angle escaping light to the front through reflection / refraction. Simultaneously, the gentle slope does not excessively compress the emission angle, adapting to the strong scattering characteristic of long-wavelength light. Short-wavelength light has strong directionality, weak lateral scattering, and is easily absorbed and lost by optical media. Using a larger second angle, i.e. a steeper slope, reduces the contact area between short-wavelength light and the sidewall, thus reducing light absorption loss. On the other hand, it only performs simple convergence on a small amount of lateral stray light, preserving the original output direction of the short-wavelength light and avoiding optical path distortion.

[0060] For example, the first material light-emitting device 200a includes a first light-emitting device 2001 and a second light-emitting device 2002, wherein the emission wavelength of the first light-emitting device 2001 is greater than the emission wavelength of the second light-emitting device 2002; and the second included angle corresponding to the first light-emitting device 2001 is smaller than the second included angle corresponding to the second light-emitting device 2002.

[0061] In one embodiment, the emission wavelength of the first material light-emitting device 200a is greater than that of the second material light-emitting device 200b; the refractive index of the second focusing structure 520 is less than that of the first focusing structure 510. Since the luminous efficiency of the first material light-emitting device 200a is higher, to balance the light emission efficiency of the second material light-emitting device 200b, the refractive index of the first focusing structure 510 corresponding to the second material light-emitting device 200b is made greater than the refractive index of the second focusing structure 520 corresponding to the first material light-emitting device 200a. This improves the overall display efficiency of the display panel, reduces power consumption, and extends the lifespan of the second material light-emitting device 200b, thereby extending the lifespan of the entire display panel.

[0062] For example, the first material light-emitting device 200a includes a first light-emitting device 2001 and a second light-emitting device 2002, wherein the emission wavelength of the first light-emitting device 2001 is greater than the emission wavelength of the second light-emitting device 2002; the refractive index of the second focusing structure 520 corresponding to the first light-emitting device 2001 is greater than the refractive index of the second focusing structure 520 corresponding to the second light-emitting device 2002. Alternatively, the refractive index of the second focusing structure 520 corresponding to the first light-emitting device 2001 is equal to the refractive index of the second focusing structure 520 corresponding to the second light-emitting device 2002. Alternatively, the refractive index of the second focusing structure 520 corresponding to the first light-emitting device 2001 is less than the refractive index of the second focusing structure 520 corresponding to the second light-emitting device 2002.

[0063] For example, the refractive index of the first focusing structure 510 is greater than or equal to 1.7 and less than or equal to 2.5. For example, it can be 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, etc.

[0064] For example, the refractive index of the second focusing structure 520 is greater than or equal to 1.7 and less than or equal to 2.5. For example, it can be 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, etc.

[0065] For example, such as Figure 10 As shown, the display panel also includes an optical adhesive layer 600, and a first light-concentrating structure 510 located on the side of the optical adhesive layer 600 near the substrate 100. The refractive index of the first light-concentrating structure 510 is greater than that of the optical adhesive layer 600. The high-refractive-index first light-concentrating structure 510, combined with the low-refractive-index optical adhesive layer 600, forms a natural reflective interface, which can recapture scattered light that is about to escape outward and redirect it back to the viewing direction.

[0066] In one embodiment, along the direction away from the substrate 100, the first focusing structure 510 includes at least two stacked focusing layers with different refractive indices between adjacent focusing layers. This multilayer structure can form a gradient refractive index distribution at the interfaces of different materials, thereby effectively reducing light reflection loss at the interfaces between layers. When light passes through this composite structure with a gradient refractive index, its propagation path can be guided more smoothly and effectively, ultimately achieving a higher light extraction efficiency than a single-layer structure.

[0067] For example, the refractive index of the focusing layer of the first focusing structure 510 adjacent to the optical adhesive layer 600 is greater than the refractive index of the optical adhesive layer 600.

[0068] In one embodiment, the refractive index of the second focusing structure 520 is greater than the refractive index of the optical adhesive layer 600. Exemplarily, the second focusing structure 520 includes at least two stacked focusing layers with adjacent layers having different refractive indices. Exemplarily, the refractive index of the focusing layer of the second focusing structure 520 adjacent to the optical adhesive layer 600 is greater than the refractive index of the optical adhesive layer 600.

[0069] In this disclosure, the optical adhesive layer 600 is a functional layer that can improve forward light emission efficiency by altering the light transmission path through refractive index differences. For example, it may include, but is not limited to, a layer formed of a high-refractive-index organic material, or a layer formed of an inorganic high-refractive-index material, or a composite structure layer having a refractive index higher than that of the adjacent medium, or a combination thereof.

[0070] For example, the thickness of the optical adhesive layer 600 is greater than or equal to 3 μm and less than or equal to 12 μm. For instance, the thickness of the optical adhesive layer 600 can be 3 μm, 5 μm, 7 μm, 9 μm, 11 μm, or 12 μm. This provides sufficient space height for the first light-concentrating structure 510 and / or the second light-concentrating structure 520, while ensuring the mechanical strength and optical uniformity of the entire panel.

[0071] For example, the refractive index of the optical adhesive layer 600 is greater than or equal to 1.3 and less than or equal to 1.6. For example, it can be 1.3, 1.4, 1.5, 1.6, etc.

[0072] Furthermore, such as Figure 10 As shown, the display panel also includes a touch structure 331, located between the light-emitting device 200 and the first light-concentrating structure 510. Therefore, placing the first light-concentrating structure 510 on the side of the touch structure 331 facing away from the substrate helps improve the flatness of the internal film layers of the display panel. If the first light-concentrating structure 510 were placed on the side of the touch structure 331 closer to the substrate, it might cause the touch structure 331 to become uneven, affecting the touch function.

[0073] For example, along a direction away from the substrate 100, the touch structure 331 includes a stacked first metal layer, a first insulating layer, and a second metal layer. The first metal layer is made of stacked titanium, aluminum, and titanium layers, and the second metal layer is made of stacked titanium, aluminum, and titanium layers. The first insulating layer is made of silicon nitride.

[0074] For example, the display panel further includes an encapsulation layer 300, which includes a first encapsulation layer 311, a second encapsulation layer 312 and a third encapsulation layer 313 stacked in a direction away from the substrate 100. A second insulating layer is also disposed between the third encapsulation layer 313 and the touch structure 331. The material of the second insulating layer includes silicon nitride.

[0075] In a specific example, the horizontal extension of the focusing structure corresponding to different color light-emitting devices can be combined as follows: designed according to the emission wavelength gradient, the extension of the focusing structure corresponding to the red light-emitting device is 3μm-5μm, the extension of the focusing structure corresponding to the green light-emitting device is 2μm-3μm, and the extension of the focusing structure corresponding to the blue light-emitting device is 1μm-2μm.

[0076] In a specific example, the sidewall tilt angles of the focusing structure corresponding to different colored light-emitting devices can be combined as follows: the sidewall tilt angle of the focusing structure corresponding to red light-emitting devices is 70°-73°, the sidewall tilt angle of the focusing structure corresponding to green light-emitting devices is 73°-77°, and the sidewall tilt angle of the focusing structure corresponding to blue light-emitting devices is 77°-80°.

[0077] According to the display panel provided in the embodiments of this disclosure, referring to... Figure 10 The first material light-emitting device 200a includes a first light-emitting device 2001 and a second light-emitting device 2002. The first distance corresponding to the first light-emitting device 2001 is greater than the first distance corresponding to the second light-emitting device 2002. This scheme matches the extension of the focusing structure according to wavelength gradient: the first light-emitting device 2001 emits the longest wavelength red light, and its largest first distance maximizes the lateral coverage of the focusing structure, maximizing the collection of large-angle scattered light and intercepting lateral light leakage; the second light-emitting device 2002 emits medium wavelength green light, and its medium first distance balances focusing effect and light emission angle; the second material light-emitting device 200b emits the shortest wavelength blue light, and its smallest second distance reduces the absorption loss of blue light by the optical structure under the premise of basic light control.

[0078] For example, the emission wavelength of the first light-emitting device 2001 is greater than that of the second light-emitting device 2002; along a direction parallel to the plane of the substrate 100, the distance by which the second focusing structure 520 corresponding to the first light-emitting device 2001 extends beyond the effective region E of the first light-emitting device 2001 is greater than the distance by which the second focusing structure 520 corresponding to the second light-emitting device 2002 extends beyond the effective region E of the second light-emitting device 2002. In this scheme, the first light-emitting device 2001 emits red light, the second light-emitting device 2002 emits blue light, and the second material light-emitting device 200b emits blue light. According to the above scheme, light-emitting devices of different wavelengths are adapted to focusing structures with different extension amounts, so that light-emitting devices 200 of different colors can obtain light extraction efficiency compensation positively correlated with their wavelength characteristics, thereby accurately controlling the light output of the first light-emitting device 2001, the second light-emitting device 2002, and the second material light-emitting device 200b, so that the overall luminous efficiency and lifespan under white light conditions are optimized.

[0079] For example, refer to Figure 10 The distance by which the first focusing structure 510 extends beyond the effective region E of the second material light-emitting device 200b is greater than or equal to 1 μm and less than or equal to 5 μm; and / or, the distance by which the second focusing structure 520 corresponding to the first light-emitting device 2001 extends beyond the effective region E of the first light-emitting device 2001 is greater than or equal to 1 μm and less than or equal to 5 μm; and / or, the distance by which the second focusing structure 520 corresponding to the second light-emitting device 2002 extends beyond the effective region E of the second light-emitting device 2002 is greater than or equal to 1 μm and less than or equal to 5 μm.

[0080] For example, each light-emitting device 200 includes a first electrode 211, a light-emitting functional layer 212, and a second electrode 213 stacked together. The first electrode 211 is disposed on the array substrate 100, and a pixel defining layer 400 covers the end of the first electrode 211. The pixel defining layer 400 has a pixel opening through which the first electrode 211 is exposed. The light-emitting functional layer 212 of the light-emitting device 200 covers the sidewall of the pixel opening of the pixel defining layer 400 and the side of the pixel defining layer 400 facing away from the substrate 100. Each light-emitting functional layer 212 is located within the pixel opening and is in contact with the first electrode 211.

[0081] For example, refer to Figure 11The second included angle j2 corresponding to the first light-emitting device 2001 is smaller than the second included angle j2 corresponding to the second light-emitting device 2002, and the emission wavelength of the first light-emitting device 2001 is greater than the emission wavelength of the second light-emitting device 200b. Understandably, red light has the longest wavelength and the strongest lateral scattering, so a gentle sidewall with the smallest included angle is used to fully collect large-angle scattered light; green light has moderate optical characteristics, so a sidewall with a medium included angle is used to achieve balanced light path control; blue light has the shortest wavelength and is prone to light absorption loss, so a steep sidewall with the largest included angle is used to reduce the contact area between the light and the sidewall to reduce light loss. The sidewall tilt angle is set differently for the scattering and loss characteristics of red, green, and blue light, comprehensively improving the light extraction efficiency of each sub-pixel, balancing the brightness of the three colors, and effectively reducing the overall power consumption of the display panel.

[0082] Furthermore, in organic light-emitting diode (OLED) display panels, to achieve high luminous efficiency and long lifespan under white light conditions, the emissive layers of red and green sub-pixels can include pTSF material. This material is used to transfer triplet exciton energy to the emitting object, thereby simultaneously obtaining high internal quantum efficiency and a narrow emission spectrum. For blue sub-pixels, due to the stability and lifespan limitations of blue light-emitting materials, it is not yet possible to construct the emissive layer in the same way, and a conventional fluorescent light-emitting system is generally still used. However, since red and green light use thermally activated delayed fluorescence sensitization (TRF) technology, their luminous efficiency is significantly higher than that of blue light. As a result, when displaying a white image, the overall brightness decay rate of the device is dominated by the lifespan of the blue sub-pixels, leading to a bottleneck in the lifespan of the device for white light displays. Through in-depth analysis, the inventors of this disclosure discovered that the root cause of the above contradiction lies in the fact that the emissive layer of the blue sub-pixels itself cannot simultaneously achieve the same order of magnitude efficiency improvement as red and green light due to material system limitations. Moreover, the encapsulation layer provides almost no difference in the optical boundary conditions for each color sub-pixel, failing to implement dedicated light emission enhancement for blue light. If brightness is compensated solely by increasing the blue light current, it will accelerate the aging of the blue light material, further compressing its actual lifespan. In this embodiment, a first light-concentrating structure 510 is provided on the side of the second material light-emitting device 200b away from the substrate 100, which can improve the light extraction efficiency of the second material light-emitting device 200b (blue light-emitting device), reduce the power consumption of the second material light-emitting device 200b, and extend the lifespan of the second material light-emitting device 200b.

[0083] A second aspect of this disclosure provides a display panel, with reference to Figure 3 The display panel includes: a substrate 100, multiple light-emitting devices 200, and multiple light-concentrating structures.

[0084] For example, a plurality of light-emitting devices 200 are located on one side of the substrate 100; the plurality of light-emitting devices 200 include a first material light-emitting device 200a and a second material light-emitting device 200b; a plurality of light-concentrating structures are located on the side of the light-emitting devices 200 away from the substrate 100; the plurality of light-concentrating structures include a first light-concentrating structure 510 and a second light-concentrating structure 520; the orthographic projection of the first light-concentrating structure 510 on the substrate 100 overlaps with the orthographic projection of the second material light-emitting device 520 on the substrate 100, and the orthographic projection of the second light-concentrating structure 520 on the substrate 100 overlaps with the orthographic projection of the first material light-emitting device 200a on the substrate 100; along a direction parallel to the plane of the substrate 100, the distance by which the first light-concentrating structure 510 extends beyond the effective area of ​​the second material light-emitting device 200b is different from the distance by which the second light-concentrating structure 520 extends beyond the effective area of ​​the first material light-emitting device 200a.

[0085] For example, by setting light-concentrating structures of different sizes (i.e., different distances extending from the effective area) on light-emitting devices 200 of different colors, the inherent differences in luminous efficiency between light-emitting devices 200 of different colors can be specifically compensated, thereby balancing the light-emitting efficiency of each color sub-pixel, improving the luminous efficiency of the overall white light image of the device, and extending the lifespan of the overall device which is limited by inefficient light-emitting devices.

[0086] It should be noted that the substrate 100, the multiple light-emitting devices 200, the first light-concentrating structure and the second light-concentrating structure are consistent with the previous description, and will not be repeated here.

[0087] By way of example, this disclosure also provides a method for manufacturing a display panel, referring to Figure 12 The diagram shows a process flow chart for manufacturing a display panel, which includes the following steps.

[0088] S1: Multiple light-emitting devices are fabricated on one side of the substrate.

[0089] Specifically, the substrate and light-emitting device are the same as described above, and will not be repeated here.

[0090] For example, fabricating multiple light-emitting devices on one side of a substrate includes: fabricating a first electrode on one side of the substrate; fabricating a pixel defining layer 400 (PDL) on the side of the first electrode away from the substrate using photolithography and etching processes, wherein the pixel defining layer encloses a first pixel opening and a second pixel opening; fabricating a light-emitting functional layer of the first material light-emitting device and the second light-emitting device within the first pixel opening, and fabricating a light-emitting functional layer of the second material light-emitting device within the second pixel opening; and fabricating a second electrode on the side of the light-emitting functional layer away from the substrate to obtain multiple light-emitting devices.

[0091] S2: A touch structure is fabricated on the side of the light-emitting device that is away from the substrate.

[0092] For example, before fabricating the touch structure on the side of the light-emitting device away from the substrate, the method further includes: sequentially fabricating a first encapsulation layer, a second encapsulation layer, and a third encapsulation layer on the side of the second electrode away from the substrate.

[0093] For example, the first encapsulation layer is prepared by chemical vapor deposition (CVD); the second encapsulation layer is prepared by inkjet printing (IJP); and the third encapsulation layer is prepared by chemical vapor deposition.

[0094] For example, fabricating a touch structure on the side of the light-emitting device away from the substrate includes: fabricating a touch structure on the side of the third encapsulation layer away from the substrate.

[0095] S3: Multiple light-concentrating structures are fabricated on the side of the touch structure away from the substrate.

[0096] For example, the multiple light-concentrating structures include a first light-concentrating structure and a second light-concentrating structure; along a direction parallel to the plane of the substrate, the distance by which the first light-concentrating structure extends beyond the effective area of ​​the first light-emitting device is different from the distance by which the second light-concentrating structure extends beyond the effective area of ​​the second light-emitting device.

[0097] As can be understood, the light-gathering structure is consistent with the previous description, so I will not go into further detail here.

[0098] For example, fabricating multiple light-concentrating structures on the side of the touch structure away from the substrate includes: coating a high-refractive-index transparent photoresist (high-refractive-index OC) on the side of the touch structure away from the substrate, controlling the total thickness of the film layer to be 2.6 μm; and completing the patterning of the light-concentrating structure through a photolithography process.

[0099] It should be noted that the embodiments provided in the second aspect can be combined with the embodiments provided in the first aspect in whole or in part, and will not be elaborated further here.

[0100] A third aspect of this disclosure provides a display device that includes a display panel according to the first aspect of this disclosure, or a display panel according to the second aspect of this disclosure.

[0101] In some possible implementations, the display device includes the display panel described in this disclosure. The display device may include devices with image processing capabilities, such as mobile phones, desktop computers, laptops, tablets, automotive displays, wearable devices, etc.

[0102] It should be noted that, in addition to the aforementioned display panel, the display device may also include the structures that a conventional display device should have, such as the casing and power supply, which will not be elaborated further here.

[0103] The basic principles of this disclosure have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this disclosure are merely examples and not limitations, and should not be considered as essential features of each embodiment of this disclosure. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the scope of this disclosure to the necessity of employing the aforementioned specific details for implementation.

[0104] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this disclosure to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A display panel, characterized in that, include: substrate; Multiple light-emitting devices are located on one side of the substrate; each light-emitting device includes at least one light-emitting layer; the multiple light-emitting devices include a first material light-emitting device and a second material light-emitting device. The light-emitting layer of the first material light-emitting device includes a phosphorescently assisted thermally activated sensitized fluorescent light-emitting material; the material of the light-emitting layer of the second material light-emitting device is different from the material of the light-emitting layer of the first material light-emitting device. Multiple first light-concentrating structures are located on the side of the second material light-emitting device away from the substrate.

2. The display panel according to claim 1, characterized in that, The emission wavelength of the first material light-emitting device is greater than the emission wavelength of the second material light-emitting device; The display panel further includes multiple second light-concentrating structures located on the side of the first material light-emitting device facing away from the substrate; the refractive index of the first light-concentrating structure is greater than the refractive index of the second light-concentrating structure; or... The first material light-emitting device does not have a lens on the side facing away from the substrate.

3. The display panel according to claim 2, characterized in that, Along a direction parallel to the plane of the substrate, the distance by which the first light-concentrating structure extends beyond the effective area of ​​the second material light-emitting device is less than the distance by which the second light-concentrating structure extends beyond the effective area of ​​the first material light-emitting device.

4. The display panel according to claim 2, characterized in that, The first material light-emitting device includes a first light-emitting device and a second light-emitting device, wherein the emission wavelength of the first light-emitting device is greater than the emission wavelength of the second light-emitting device. Along a direction parallel to the plane of the substrate, the distance by which the second light-concentrating structure extends beyond the effective area of ​​the first light-emitting device is greater than the distance by which the second light-concentrating structure extends beyond the effective area of ​​the second light-emitting device; Preferably, the thickness of the first light-concentrating structure is greater than or equal to 2 μm and less than or equal to 6 μm; and / or, the thickness of the second light-concentrating structure is greater than or equal to 2 μm and less than or equal to 6 μm; Preferably, the distance by which the first light-concentrating structure extends beyond the effective area of ​​the second material light-emitting device is greater than or equal to 1 μm and less than or equal to 5 μm; And / or, the distance by which the second focusing structure extends beyond the effective area of ​​the first material light-emitting device is greater than or equal to 1 μm and less than or equal to 5 μm.

5. The display panel according to claim 2, characterized in that, Also includes: A pixel defining layer is located on one side of the substrate. The pixel defining layer encloses a plurality of pixel openings, including a first pixel opening and a second pixel opening. At least a portion of the first material light-emitting device is located in the first pixel opening, and at least a portion of the second material light-emitting device is located in the second pixel opening. The distance between the edge of the orthographic projection of the second light-concentrating structure on the substrate and the edge of the orthographic projection of the first pixel opening on the substrate is a first distance, and the distance between the edge of the orthographic projection of the first light-concentrating structure on the substrate and the edge of the orthographic projection of the second pixel opening on the substrate is a second distance. The first distance and the second distance are different. Preferably, the emission wavelength of the first material light-emitting device is greater than the emission wavelength of the second material light-emitting device; and the first distance is greater than the second distance.

6. The display panel according to claim 1, characterized in that, The first light-concentrating structure includes a first central region and a first edge region, the first edge region surrounds at least a portion of the first central region, and the orthographic projection of the effective area of ​​the second material light-emitting device on the substrate is located within the orthographic projection range of the first central region on the substrate; The thickness of the first edge region is less than or equal to the thickness of the first central region; Preferably, the sidewall of the first light-concentrating structure is located in the first edge region, and the distance between the sidewall of the first light-concentrating structure and the substrate increases along the direction close to the first central region. Preferably, the sidewall of the first light-concentrating structure includes at least one arc shape; Preferably, the surface of the first central region facing away from the substrate is parallel to the plane of the substrate.

7. The display panel according to claim 6, characterized in that, The sidewall of the first light-concentrating structure includes a first end and a second end. The first end is located on the side of the second end away from the substrate, and the first end is located on the side of the second end close to the first central region. The angle between the line connecting the first end and the second end and the plane where the substrate is located is greater than or equal to 70° and less than or equal to 80°. Preferably, the display panel further includes a plurality of second light-concentrating structures located on the side of the first material light-emitting device facing away from the substrate; the second light-concentrating structure includes a second central region and a second edge region, the second edge region surrounding at least a portion of the second central region, and the orthographic projection of the effective area of ​​the first material light-emitting device on the substrate is located within the orthographic projection range of the second central region on the substrate; The sidewall of the second light-concentrating structure includes a third end and a fourth end. The third end is located on the side of the fourth end away from the substrate, and the third end is located on the side of the fourth end close to the second central region. The angle between the line connecting the third end and the fourth end and the plane of the substrate is greater than or equal to 70° and less than or equal to 80°. Preferably, the emission wavelength of the first material light-emitting device is greater than the emission wavelength of the second material light-emitting device; The angle between the line connecting the first end and the second end and the plane where the substrate is located is the first angle, and the angle between the line connecting the third end and the fourth end and the plane where the substrate is located is the second angle, which is smaller than the first angle. Preferably, the first material light-emitting device includes a first light-emitting device and a second light-emitting device, wherein the emission wavelength of the first light-emitting device is greater than the emission wavelength of the second light-emitting device; The second included angle corresponding to the first light-emitting device is smaller than the second included angle corresponding to the second light-emitting device.

8. The display panel according to claim 1, characterized in that, The display panel further includes an optical adhesive layer, and the first light-concentrating structure is located on the side of the optical adhesive layer closer to the substrate. The refractive index of the first light-concentrating structure is greater than the refractive index of the optical adhesive layer. Preferably, along the direction away from the substrate, the first light-concentrating structure includes at least two stacked light-concentrating layers, with adjacent light-concentrating layers having different refractive indices; Preferably, the thickness of the optical adhesive layer is greater than or equal to 3 μm and less than or equal to 12 μm.

9. The display panel according to claim 1, characterized in that, The light-emitting layer of the second material light-emitting device includes at least one of fluorescent light-emitting material, phosphorescent light-emitting material, thermally activated delayed fluorescence sensitized fluorescent light-emitting material, and phosphorescent-assisted thermally activated sensitized fluorescent light-emitting material; Preferably, the display panel further includes a touch structure located between the light-emitting device and the first light-concentrating structure.

10. A display panel, characterized in that, include: substrate; Multiple light-emitting devices are located on one side of the substrate; The plurality of light-emitting devices include a first material light-emitting device and a second material light-emitting device; Multiple light-focusing structures are located on the side of the light-emitting device facing away from the substrate; the multiple light-focusing structures include a first light-focusing structure and a second light-focusing structure; the orthographic projection of the first light-focusing structure on the substrate overlaps with the orthographic projection of the second material light-emitting device on the substrate, and the orthographic projection of the second light-focusing structure on the substrate overlaps with the orthographic projection of the first material light-emitting device on the substrate; Along a direction parallel to the plane of the substrate, the distance by which the first light-concentrating structure extends beyond the effective area of ​​the second material light-emitting device is different from the distance by which the second light-concentrating structure extends beyond the effective area of ​​the first material light-emitting device.

Images