Display panel, preparation method thereof and display device

Abstract

The application provides a display panel, which has a display area, a hole area and a peripheral area, the peripheral area is arranged at the periphery of the hole area, the display area is arranged at the periphery of the peripheral area, and the display panel comprises a back plate, a plurality of light emitting elements, an encapsulation layer and a first flat layer, the back plate, the encapsulation layer and the first flat layer are located in the display area and the peripheral area, the plurality of light emitting elements are located in the display area and on one side of the back plate, the encapsulation layer is located on the side of the plurality of light emitting elements away from the back plate, the first flat layer is located on the side of the encapsulation layer away from the back plate, further comprising a plurality of light extraction structures, which are located in the display area, on the side of the encapsulation layer away from the back plate and on the side of the first flat layer close to the back plate, the plurality of light extraction structures correspond to the plurality of light emitting elements one by one, and the orthographic projection of the light extraction structure on the back plate covers the light emitting element. The display panel can avoid the occurrence of GDSH (i.e. black spots on the edge of the hole) in the peripheral area at the periphery of the hole area.

Description

Technical Field

[0001] This invention belongs to the field of display technology, specifically relating to a display panel, its manufacturing method, and a display device. Background Technology

[0002] With the advancement of technology and the improvement of living standards, consumers have increasingly higher demands for display products. High-resolution, high-definition display products are a definite development trend.

[0003] OLED (Organic Light-Emitting Diode) display products are highly favored due to their characteristics such as self-illumination, high brightness, wide viewing angle, fast response, and the ability to manufacture full-color components in red, green, and blue. Summary of the Invention

[0004] This invention addresses the reliability failure issue of OLED display panels, specifically the problem of GDSH (ghost black spots) defects at the aperture edges, by providing a display panel, its fabrication method, and a display device. In this display panel, a first planarization layer is provided in the peripheral area, but no light extraction structure is provided. This ensures that the light extraction structure and the first planarization layer do not contact each other, thus preventing warping of the light extraction structure during reliability testing due to material differences between the two layers. This avoids reliability failure of the display panel and ultimately prevents GDSH defects (ghost black spots) from occurring in the peripheral area around the aperture region of the display panel.

[0005] This invention provides a display panel having a display area, a hole area, and a peripheral area, wherein the peripheral area surrounds the periphery of the hole area, and the display area surrounds the periphery of the peripheral area.

[0006] The display panel includes a back panel, multiple light-emitting elements, an encapsulation layer, and a first planarization layer.

[0007] The backplate, the encapsulation layer, and the first planarization layer are located in the display area and the peripheral area.

[0008] The plurality of light-emitting elements are located in the display area and on one side of the back panel.

[0009] The encapsulation layer is located on the side of the plurality of light-emitting elements that faces away from the backplate.

[0010] The first planarization layer is located on the side of the encapsulation layer opposite to the backplate.

[0011] It also includes multiple light extraction structures located in the display area, and located on the side of the encapsulation layer away from the back plate and on the side of the first planarization layer close to the back plate. Each of the multiple light extraction structures corresponds to one of the multiple light-emitting elements, and the orthogonal projection of the light extraction structure on the back plate covers the light-emitting element.

[0012] In some embodiments, the refractive index of the light extraction structure ranges from 1.65 to 1.9.

[0013] In some embodiments, the cross-sectional shape of the light extraction structure perpendicular to the back plate includes a trapezoid.

[0014] The base angle of the trapezoid is in the range of 60° to 70°.

[0015] In some embodiments, a touch pattern is further included, located in the display area, and on the side of the light extraction structure opposite to the back plate and the side of the first planarization layer near the back plate. The touch pattern does not overlap with the orthographic projection of the light extraction structure and the light-emitting element on the back plate.

[0016] It also includes a first insulating layer located on the side of the light extraction structure opposite to the back plate and on the side of the touch pattern near the back plate.

[0017] The touch pattern includes a first layer of pattern and a second layer of pattern stacked sequentially away from the back panel.

[0018] The display panel further includes a second insulating layer located on the side of the first layer pattern facing away from the back panel and on the side of the second layer pattern close to the back panel.

[0019] A portion of the second layer pattern is electrically connected to a portion of the first layer pattern through a via formed in the second insulating layer.

[0020] In some embodiments, the refractive index of the light extraction structure is greater than or equal to the refractive indices of the first insulating layer and the second insulating layer.

[0021] The refractive indices of the first insulating layer and the second insulating layer are greater than the refractive index of the first planarization layer.

[0022] In some embodiments, a touch pattern is further included, located in the display area, and on the side of the encapsulation layer opposite to the backplate and the side of the light extraction structure near the backplate. The touch pattern does not overlap with the orthographic projection of the light extraction structure and the light-emitting element on the backplate.

[0023] The touch pattern includes a first layer of pattern and a second layer of pattern stacked sequentially away from the back panel.

[0024] The display panel further includes a first insulating layer located on the side of the encapsulation layer opposite to the backplate and on the side of the first layer pattern closest to the backplate.

[0025] The display panel further includes a second insulating layer located on the side of the first layer pattern facing away from the back panel and on the side of the second layer pattern close to the back panel.

[0026] A portion of the second layer pattern is electrically connected to a portion of the first layer pattern through vias formed in the second insulating layer;

[0027] The display panel further includes a second planarization layer located on the side of the second layer pattern opposite to the back plate and on the side of the light extraction structure close to the back plate, wherein the orthographic projection of the second planarization layer on the back plate covers the display area and the peripheral area.

[0028] In some embodiments, the refractive index of the light extraction structure is greater than or equal to the refractive indices of the first insulating layer and the second insulating layer.

[0029] The refractive index of the light extraction structure is greater than that of the first planarization layer and the second planarization layer.

[0030] In some embodiments, the backsheet includes a substrate, a plurality of insulating film layers, and a plurality of conductive film layers.

[0031] The conductive film layer and the insulating film layer are alternately stacked on one side of the substrate;

[0032] The encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer, which are stacked sequentially away from the backplate.

[0033] The present invention also provides a display device, including the above-described display panel.

[0034] The present invention also provides a method for manufacturing the above-mentioned display panel, comprising: manufacturing a backplate;

[0035] Multiple light-emitting elements are fabricated on one side of the back plate;

[0036] An encapsulation layer is prepared on the side of the plurality of light-emitting elements opposite to the back plate;

[0037] Multiple light extraction structures are fabricated on the side of the encapsulation layer opposite to the backplate;

[0038] A first planarization layer is prepared on the side of the light extraction structure opposite to the back plate;

[0039] Holes are formed in the display panel by cutting through the thickness of the display panel, and the holes are used to house a camera device.

[0040] The beneficial effects of the present invention are as follows: The display panel provided by the present invention, by setting multiple light extraction structures in the display area, and the multiple light extraction structures corresponding one-to-one with multiple light-emitting elements, on the one hand, the light extraction structures can refract and converge the light emitted by the light-emitting elements, thereby improving the light extraction rate of each light-emitting element, thereby improving the problem of the light emission brightness of the light-emitting elements decaying with the viewing angle, and reducing the power consumption of the display panel; on the other hand, the peripheral area is provided with a first planarization layer but no light extraction structure is provided, so the peripheral area light extraction structure and the first planarization layer do not contact each other, thereby avoiding the warping of the light extraction structure of the display panel during the reliability test due to the material difference between the two, avoiding the reliability failure of the display panel, and ultimately avoiding GDSH (i.e., black spots at the edge of the hole) defects in the peripheral area of ​​the display panel.

[0041] The display device provided by the present invention improves the display effect by adopting the above-described display panel. Attached Figure Description

[0042] Figure 1a This is a partial cross-sectional view of the display area of ​​an OLED display panel in related technologies;

[0043] Figure 1b This is a partial cross-sectional view of the peripheral area of ​​an OLED display panel in related technologies;

[0044] Figure 1c This is a schematic diagram illustrating the warping of the peripheral light extraction film layer in an OLED display panel during reliability testing in a related technology.

[0045] Figure 2a This is a partial cross-sectional view of the display area of ​​a display panel in an embodiment of the present invention;

[0046] Figure 2b This is a partial cross-sectional view of the peripheral area of ​​a display panel in an embodiment of the present invention;

[0047] Figure 3a This is a partial cross-sectional view of the display area of ​​another display panel in an embodiment of the present invention;

[0048] Figure 3b This is a partial cross-sectional view of the peripheral area of ​​another display panel in an embodiment of the present invention;

[0049] Figure 4 for Figure 1a , Figure 2a and Figure 3a A comparative schematic diagram of the manufacturing process of the display panel.

[0050] The reference numerals in the attached figures are:

[0051] 100. Display area; 101. Hole area; 102. Peripheral area; 1. Backplate; 10. Substrate; 11. Insulating film layer; 12. Conductive film layer; 2. Light-emitting element; 21. Anode; 22. Light-emitting functional layer; 23. Cathode; 3. Encapsulation layer; 31. First inorganic encapsulation layer; 32. Organic encapsulation layer; 33. Second inorganic encapsulation layer; 4. First planarization layer; 5. Light extraction structure; 6. Touch pattern; 61. First layer pattern; 62. Second layer pattern; 7. First insulating layer; 8. Second insulating layer; 9. Second planarization layer; 13. Dam; 14. Isolation pillar; 15. Light extraction film layer; 16. Camera mounting hole; 17. Planarization layer; 18. Pixel demarcation layer. Detailed Implementation

[0052] To enable those skilled in the art to better understand the technical solution of the present invention, the following describes in further detail a display panel, its preparation method, and a display device, in conjunction with the accompanying drawings and specific embodiments.

[0053] Currently, due to different application scenarios, low power consumption has become a development trend for OLED display products. EES-OLED technology (that is, setting a light extraction film layer on the light-emitting side of the OLED display panel) has emerged to meet this need.

[0054] In related technologies, OLED display panels with an FMLOC (Flexible Multi-Layer on Cell, touch film layer) + EES (light extraction film layer) structure integrate both a touch film layer and a light extraction film layer on their display side. After the various film layers of the OLED display panel are fabricated, camera mounting holes that penetrate the entire thickness of the OLED display panel are cut within the display area.

[0055] like Figure 1a , Figure 1b and Figure 1c As shown, during the fabrication of the OLED display panel, the light extraction film 15 is formed throughout the entire display area 100 of the OLED display panel. The camera mounting hole 16 is fully covered by the light extraction film 15 and the planarization layer 17. This is because if the light extraction film 15 does not cover the camera mounting hole 16, a pit will be formed at the camera mounting hole 16 relative to other areas within the display area 100. This can easily cause air bubbles to form at the camera mounting hole 16 when the polarizer is subsequently attached. After the camera mounting hole 16 is cut and formed, the light extraction film 15 and the planarization layer 17 are stacked sequentially in the peripheral area 102 of the camera mounting hole 16. Due to the difference in materials between the light extraction film 15 and the planarization layer 17, the light extraction film 15 warps during the reliability test of the OLED display panel, resulting in a reliability failure of the OLED display panel and the occurrence of GDSH (i.e., black spots at the edge of the hole) defects.

[0056] To address the reliability failure issue of OLED display panels, specifically the problem of GDSH (black spots at the aperture edges) defects, embodiments of the present invention provide a display panel, such as... Figure 2a , Figure 2b , Figure 3a and Figure 3b As shown, the display panel has a display area 100, an aperture area 101, and a peripheral area 102. The peripheral area 102 surrounds the aperture area 101, and the display area 100 surrounds the peripheral area 102. The display panel includes a back plate 1, multiple light-emitting elements 2, an encapsulation layer 3, and a first planarization layer 4. The back plate 1, the encapsulation layer 3, and the first planarization layer 4 are located in the display area 100 and the peripheral area 102, respectively. The multiple light-emitting elements 2 are located in the display area 100 and on one side of the back plate 1. The encapsulation layer 3 is located on the side of the multiple light-emitting elements 2 away from the back plate 1. The first planarization layer 4 is located on the side of the encapsulation layer 3 away from the back plate 1. The panel also includes multiple light extraction structures 5, located in the display area 100 and on the side of the encapsulation layer 3 away from the back plate 1 and on the side of the first planarization layer 4 close to the back plate 1. Each of the multiple light extraction structures 5 corresponds to one of the multiple light-emitting elements 2. The orthographic projection of the light extraction structure 5 on the back plate 1 covers the light-emitting elements 2.

[0057] The first flattening layer 4 can flatten the surface of the display panel with the light extraction structure 5, thereby ensuring the flatness of the surface of the display panel with the light extraction structure 5, so that no bonding bubbles will occur when the polarizer is attached to the surface later.

[0058] In some embodiments, the light-emitting element 2 includes an anode 21, a light-emitting functional layer 22, and a cathode 23, which are stacked sequentially away from the backplate 1. A pixel defining layer 18 is provided on one side of the backplate 1, and an opening is formed in the pixel defining layer 18, in which the light-emitting element 2 is located.

[0059] By setting multiple light extraction structures 5 in the display area 100, and each of the multiple light extraction structures 5 corresponds one-to-one with multiple light-emitting elements 2, on the one hand, the light extraction structure 5 can refract and converge the light emitted by the light-emitting element 2, thereby improving the light extraction rate of each light-emitting element 2, thus improving the problem of the light emission brightness of the light-emitting element 2 decaying with the viewing angle, and reducing the power consumption of the display panel; on the other hand, the peripheral area 102 is provided with a first planarization layer 4 but not with a light extraction structure 5, so the light extraction structure 5 and the first planarization layer 4 in the peripheral area 102 do not contact each other, thereby avoiding the warping of the light extraction structure 5 in the reliability test of the display panel due to the material difference between the two, avoiding the reliability failure of the display panel, and ultimately avoiding the occurrence of GDSH (i.e., black spots at the edge of the hole) defects in the peripheral area 102 around the hole area 101 of the display panel.

[0060] In some embodiments, the refractive index of the light extraction structure 5 ranges from 1.65 to 1.9. The light extraction structure 5 can refract the light emitted by the light-emitting element 2, thereby converging the light emitted by the light-emitting element 2 and improving the light extraction efficiency of the light emitted by the light-emitting element 2. The higher the refractive index of the light extraction structure 5, the greater the power consumption benefit of the display panel to achieve the same light extraction efficiency.

[0061] In some embodiments, the cross-sectional shape of the light extraction structure 5 perpendicular to the back plate 1 includes a trapezoid, and the base angle θ of the trapezoid ranges from 60° to 70°. An excessively large or small base angle θ of the trapezoid will lead to a decrease in the power consumption benefit of the display panel. For example, when the refractive index of the light extraction structure 5 is 1.7, the improvement in the luminous efficiency of the display panel and the luminous brightness decay (L-Decay) of the display panel at a 30° viewing angle are shown in Table 1 below.

[0062] Table 1

[0063] The base angle of the trapezoid (Hn1.71) Efficiency Improvement L-Decay@30° 50 7.4％ 31.8％ 60 9.4％ 33.2％ 70 9.5％ 33.7％ 80 3.1％ 29.7％

[0064] In some embodiments, such as Figure 2a and Figure 2b As shown, the display panel also includes a touch pattern 6, located in the display area 100, and located on the side of the light extraction structure 5 away from the back plate 1 and on the side of the first planarization layer 4 near the back plate 1. The touch pattern 6 does not overlap with the orthographic projection of the light extraction structure 5 and the light-emitting element 2 on the back plate 1. It also includes a first insulating layer 7, located in the display area 100, and located on the side of the light extraction structure 5 away from the back plate 1 and on the side of the touch pattern 6 near the back plate 1. The touch pattern 6 includes a first layer pattern 61 and a second layer pattern 62 stacked sequentially away from the back plate 1. The display panel also includes a second insulating layer 8, located in the display area 100, and located on the side of the first layer pattern 61 away from the back plate 1 and on the side of the second layer pattern 62 near the back plate 1. A partial pattern of the second layer pattern 62 is electrically connected to a partial pattern of the first layer pattern 61 through a via formed in the second insulating layer 8.

[0065] The first planarization layer 4 ensures the flatness of the display panel surface where the light extraction structure 5 and touch pattern 6 are located, preventing air bubbles from forming when a polarizer is subsequently applied. Furthermore, for display panels where both the touch pattern 6 and the light extraction structure 5 are integrated on the display side, the peripheral area 102 has the first planarization layer 4 but not the light extraction structure 5. This prevents the light extraction structure 5 and the first planarization layer 4 from contacting, thus avoiding warping of the light extraction structure 5 during reliability testing due to material differences. This prevents reliability failure of the display panel and ultimately avoids GDSH (black spots at the hole edge) defects in the peripheral area 102 surrounding the hole area 101 of the display panel.

[0066] In some embodiments, the refractive index of the light extraction structure 5 is greater than or equal to the refractive index of the first insulating layer 7 and the second insulating layer 8, and the refractive index of the first insulating layer 7 and the second insulating layer 8 is greater than the refractive index of the first planarization layer 4. This configuration allows the light emitted by the light-emitting element 2 to be deflected and converged after passing sequentially through the light extraction structure 5, the first insulating layer 7, the second insulating layer 8, and the first planarization layer 4, thereby further improving the light extraction rate of the light emitted by the light-emitting element 2, and consequently enhancing the light extraction rate of the entire display panel.

[0067] In some embodiments, the first insulating layer 7 and the second insulating layer 8 are made of silicon oxide or silicon nitride. The first planarization layer 4 is made of organic resin.

[0068] In some embodiments, such as Figure 3a and Figure 3b As shown, the display panel also includes a touch pattern 6, located in the display area 100, and situated on the side of the encapsulation layer 3 away from the backplate 1 and on the side of the light extraction structure 5 near the backplate 1. The touch pattern 6 does not overlap with the orthographic projections of the light extraction structure 5 and the light-emitting element 2 onto the backplate 1. The touch pattern 6 includes a first layer pattern 61 and a second layer pattern 62 stacked sequentially away from the backplate 1. The display panel also includes a first insulating layer 7, located in the display area 100, and situated on the side of the encapsulation layer 3 away from the backplate 1 and on the side of the first layer pattern 61 near the backplate 1. The panel also includes a second insulating layer 8, located in the display area 100, and located on the side of the first layer pattern 61 away from the back plate 1 and the side of the second layer pattern 62 near the back plate 1. A partial pattern of the second layer pattern 62 is electrically connected to a partial pattern of the first layer pattern 61 through a via formed in the second insulating layer 8. The display panel also includes a second planarization layer 9, located on the side of the second layer pattern 62 away from the back plate 1 and the side of the light extraction structure 5 near the back plate 1. The orthographic projection of the second planarization layer 9 on the back plate 1 covers the display area 100 and the peripheral area 102.

[0069] The second planarization layer 9 protects the sides of the second pattern 62 from over-etching during the etching process to form the light extraction structure 5, ensuring the integrity of the second pattern 62 and consequently guaranteeing the touch accuracy and sensitivity of the touch pattern 6. The material of the second planarization layer 9 is the same as that of the first planarization layer 4. Furthermore, the combination of the first planarization layer 4 and the second planarization layer 9 flattens the surface of the display panel containing the light extraction structure 5 and the touch pattern 6, ensuring the flatness of the surface and preventing air bubbles from forming when a polarizer is subsequently attached to the surface. Meanwhile, for a display panel that integrates both a touch pattern 6 and a light extraction structure 5 on the display side, the peripheral area 102 is provided with a first planarization layer 4 and a second planarization layer 9 but without a light extraction structure 5. Thus, the light extraction structure 5 in the peripheral area 102 does not contact the first planarization layer 4 and the second planarization layer 9, thereby avoiding warping of the light extraction structure 5 in the reliability test due to the material difference between the light extraction structure 5 and the planarization layer, avoiding reliability failure of the display panel, and ultimately avoiding GDSH (i.e., black spots at the edge of the hole) defects in the peripheral area 102 around the hole area 101 of the display panel.

[0070] In some embodiments, the refractive index of the light extraction structure 5 is greater than or equal to the refractive index of the first insulating layer 7 and the second insulating layer 8, and the refractive index of the light extraction structure 5 is greater than the refractive index of the first planarization layer 4 and the second planarization layer 9. This configuration allows the light emitted by the light-emitting element 2 to be deflected and converged after passing sequentially through the first insulating layer 7, the second insulating layer 8, the second planarization layer 9, the light extraction structure 5, and the first planarization layer 4, thereby further improving the light extraction rate of the light emitted by the light-emitting element 2, and consequently enhancing the light extraction rate of the entire display panel.

[0071] In some embodiments, the first layer pattern 61 includes patterns of touch driving electrodes and touch sensing electrodes, and the second layer pattern 62 includes a pattern of bridging portions. The pattern of the bridging portions electrically connects to the pattern of the touch sensing electrodes through vias formed in the second insulating layer 8, thereby realizing the arrangement of touch driving electrode strips and touch sensing electrode strips that intersect in a spatial arrangement. The touch driving electrode strips and touch sensing electrode strips form mutual capacitance at the spatial intersection positions, thereby realizing mutual capacitance touch of the display panel.

[0072] Of course, the first layer pattern 61 and the second layer pattern 62 are not limited to the above arrangement.

[0073] In some embodiments, the backplate 1 includes a substrate 10, a plurality of insulating film layers 11, and a plurality of conductive film layers 12, wherein the conductive film layers 12 and the insulating film layers 11 are alternately stacked on one side of the substrate 10; the substrate 10 is located in the display area 100 and the peripheral area 102; the plurality of insulating film layers 11 are located in the display area 100, and some of the insulating film layers 11 are also located in the peripheral area 102; the plurality of conductive film layers 12 are located in the display area 100, and some of the conductive film layers 12 are also located in the peripheral area 102; the encapsulation layer 3 includes a first inorganic encapsulation layer 31, an organic encapsulation layer 32, and a second inorganic encapsulation layer 33, wherein the first inorganic encapsulation layer 31, the organic encapsulation layer 32, and the second inorganic encapsulation layer 33 are stacked sequentially away from the backplate 1, the organic encapsulation layer 32 is located in the display area 100, and the first inorganic encapsulation layer 31 and the second inorganic encapsulation layer 33 extend from the display area 100 to the peripheral area 102. The first inorganic encapsulation layer 31, the second inorganic encapsulation layer 33, and the first planarization layer 4 are substantially flush with the edge of the hole region 101.

[0074] The plurality of insulating film layers 11 include inorganic insulating layers and organic insulating layers. The inorganic insulating layer in the plurality of insulating film layers 11 extends from the display area 100 to the peripheral area 102. The first inorganic encapsulation layer 31 and the second inorganic encapsulation layer 33 extend from the display area 100 to the peripheral area 102, so that when the hole area 101 is cut to form, external moisture is not easily allowed to enter the display area 100 through the organic insulating layer in the back plate 1, thereby avoiding damage to the light-emitting element 2 and the conductive film layer 12 in the back plate 1 by moisture. In addition, part of the organic insulating layer is also located in the peripheral area 102 to form a dam 13 in the peripheral area 102, which can prevent the organic encapsulation layer 32 from overflowing.

[0075] In this embodiment, some of the conductive film layers 12 are also located in the peripheral region 102, thereby forming an isolation pillar 14 in the peripheral region 102. The isolation pillar 14 can isolate the light-emitting functional layer and the cathode layer of the light-emitting element 2 that extend to the peripheral region 102. That is, the peripheral region 102 does not have the anode of the light-emitting element 2, and the peripheral region 102 cannot be displayed.

[0076] The display panel provided in this embodiment of the invention provides multiple light extraction structures within the display area, with each structure corresponding to a specific light-emitting element. On one hand, these structures refract and converge the light emitted by the light-emitting elements, thereby improving the light extraction rate of each element and mitigating the problem of brightness decay with viewing angle, while also reducing power consumption. On the other hand, a first planarization layer is provided in the peripheral area without any light extraction structures, ensuring that the peripheral light extraction structures and the first planarization layer do not contact each other. This prevents warping of the light extraction structures during reliability testing due to material differences, thus avoiding reliability failure of the display panel and ultimately preventing GDSH (black spots at the hole edge) defects in the peripheral area surrounding the hole area of ​​the display panel.

[0077] Based on the above structure of the display panel, this embodiment of the invention also provides a method for manufacturing the display panel, including: manufacturing a backplate;

[0078] Multiple light-emitting elements are fabricated on one side of the backplate;

[0079] An encapsulation layer is prepared on the side of the multiple light-emitting elements away from the backplane;

[0080] Multiple light extraction structures are fabricated on the side of the encapsulation layer away from the backplane;

[0081] A first planarization layer is prepared on the side of the light extraction structure away from the back plate;

[0082] Holes are formed in the display panel by cutting through the thickness of the display panel, and the holes are used to house a camera device.

[0083] In some embodiments, such as Figure 4 As shown, Figure 1a , Figure 2a and Figure 3a A comparative diagram of the fabrication process of a display panel; where PI refers to the substrate; BP+EL refers to the backplane + light-emitting element; TFE refers to the encapsulation layer; SiNx refers to the first insulating layer; M1 refers to the first layer pattern; PVX refers to the second insulating layer; M2 refers to the second layer pattern; OC2 refers to... Figure 1a The flat layer in the middle, Figure 2a The first flat layer and Figure 3a The second flat layer in the middle; OC3 refers to Figure 3a The first flat layer in the middle; HOC refers to Figure 1a In the light extraction film layer and Figure 2a and Figure 3a The light extraction structure in the image. DeP refers to the deposition process; Mask refers to the masking process.

[0084] from Figure 2a and Figure 1a A comparison of the manufacturing processes of display panels in China shows that... Figure 2a The display panel in the middle is relative to Figure 1a The process steps for manufacturing the display panel will not be increased.

[0085] This invention also provides a display device, including the display panel described in the above embodiments.

[0086] By employing the display panel in the above embodiments, the display effect of the display device is improved.

[0087] The display device can be any product or component with display function, such as an OLED panel, OLED TV, e-paper, mobile phone, tablet computer, laptop computer, monitor, digital photo frame, navigator, etc.

[0088] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A display panel having a display area, a hole area, and a peripheral area, wherein the peripheral area surrounds the periphery of the hole area, and the display area surrounds the periphery of the peripheral area. The display panel includes a back panel, multiple light-emitting elements, an encapsulation layer, and a first planarization layer. The backplate, the encapsulation layer, and the first planarization layer are located in the display area and the peripheral area. The plurality of light-emitting elements are located in the display area and on one side of the back panel. The encapsulation layer is located on the side of the plurality of light-emitting elements that faces away from the backplate. The first planarization layer is located on the side of the encapsulation layer opposite to the backplate. Its features are, It also includes multiple light extraction structures located in the display area, and located on the side of the encapsulation layer away from the back plate and on the side of the first planarization layer close to the back plate. Each of the multiple light extraction structures corresponds to one of the multiple light-emitting elements, and the orthographic projection of the light extraction structure on the back plate covers the light-emitting element. The display panel also includes a touch pattern located in the display area, and on the side of the encapsulation layer opposite to the back plate and the side of the first planarization layer near the back plate; The touch pattern does not overlap with the orthographic projection of the light extraction structure and the light-emitting element on the back panel. The touch pattern includes a first layer of pattern and a second layer of pattern stacked sequentially away from the back panel. The display panel further includes a second insulating layer located on the side of the first layer pattern facing away from the back panel and on the side of the second layer pattern close to the back panel. A portion of the second layer pattern is electrically connected to a portion of the first layer pattern through a via formed in the second insulating layer.

2. The display panel according to claim 1, characterized in that, The refractive index of the light extraction structure ranges from 1.65 to 1.

9.

3. The display panel according to claim 1, characterized in that, The cross-sectional shape of the light extraction structure perpendicular to the back plate includes a trapezoid. The base angle of the trapezoid is in the range of 60° to 70°.

4. The display panel according to claim 1, characterized in that, The touch pattern is located on the side of the light extraction structure opposite to the back plate and on the side of the first planarization layer near the back plate. It also includes a first insulating layer located on the side of the light extraction structure opposite to the back plate and on the side of the touch pattern near the back plate.

5. The display panel according to claim 4, characterized in that, The refractive index of the light extraction structure is greater than or equal to the refractive indices of the first insulating layer and the second insulating layer. The refractive indices of the first insulating layer and the second insulating layer are greater than the refractive index of the first planarization layer.

6. The display panel according to claim 1, characterized in that, The touch pattern is located on the side of the encapsulation layer opposite to the backplate and on the side of the light extraction structure near the backplate. The display panel further includes a first insulating layer located on the side of the encapsulation layer opposite to the backplate and on the side of the first layer pattern closest to the backplate. The display panel further includes a second planarization layer located on the side of the second layer pattern opposite to the back plate and on the side of the light extraction structure close to the back plate, wherein the orthographic projection of the second planarization layer on the back plate covers the display area and the peripheral area.

7. The display panel according to claim 6, characterized in that, The refractive index of the light extraction structure is greater than or equal to the refractive indices of the first insulating layer and the second insulating layer. The refractive index of the light extraction structure is greater than that of the first planarization layer and the second planarization layer.

8. The display panel according to claim 4 or 6, characterized in that, The backplate includes a substrate, multiple insulating film layers, and multiple conductive film layers. The conductive film layer and the insulating film layer are alternately stacked on one side of the substrate; The encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer, which are stacked sequentially away from the backplate.

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

10. A method for manufacturing a display panel as described in any one of claims 1-8, characterized in that, include: Preparation of backplate; Multiple light-emitting elements are fabricated on one side of the back plate; An encapsulation layer is prepared on the side of the plurality of light-emitting elements opposite to the back plate; Multiple light extraction structures are fabricated on the side of the encapsulation layer opposite to the backplate; A first planarization layer is prepared on the side of the light extraction structure opposite to the back plate; Holes are formed in the display panel by cutting through the thickness of the display panel, and the holes are used to house a camera device.

Images