Display panel

Abstract

The present disclosure provides a display panel. The display panel comprises a driving backplane (20), a light-emitting device (30), and a lens layer (40), wherein the light-emitting device (30) comprises a first electrode (31), a light-emitting layer (32), and a second electrode (33) which are sequentially stacked in a direction away from the driving backplane (20), and the light-emitting device (30) is provided with a central area (301) and an edge area (302) surrounding the central area (301); the lens layer (40) is arranged on the side of the light-emitting device (30) away from the driving backplane (20), the lens layer (40) comprises a plurality of lens units, each lens unit comprises a first lens part (41) and a second lens part (42), the first lens part (41) overlaps the central area (301), the second lens part (42) overlaps the edge area (302), and the second lens part (42) is used for gathering light emitted from the edge area (302).

Description

Display panel

[0001] Cross-references

[0002] This disclosure claims priority to Chinese patent application number 202410171695.3 filed on February 6, 2024, entitled “Display Panel,” and the entire contents of this Chinese patent application are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the field of display technology, and in particular to a display panel. Background Art

[0004] Because silicon-based organic light-emitting diodes (OLEDs) have the characteristics of high contrast, high response speed and high PPI, they can be applied in multiple disciplines such as physics, chemistry, materials science, optoelectronics, microelectronics, electronic information science and optics.

[0005] With the development and application of silicon-based technology, higher and higher demands are being placed on display brightness. Existing technologies have problems such as a high proportion of stray light, poor color purity and color gamut, and poor brightness and viewing angle, which reduce the overall display effect.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the Invention

[0007] The purpose of the present disclosure is to overcome the above-mentioned deficiencies of the prior art and provide a display panel that reduces edge effects and improves display uniformity.

[0008] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0009] According to one aspect of the present disclosure, there is provided a display panel, comprising:

[0010] Driver backplane;

[0011] A light-emitting device comprising a first electrode, a light-emitting layer, and a second electrode stacked in sequence in a direction away from a driving backplane, wherein the light-emitting device has a central region and an edge region surrounding the central region;

[0012] A lens layer is arranged on a side of the light-emitting device away from the driving backplane, and the lens layer includes a plurality of lens units. One lens unit and one light-emitting device are arranged to overlap, and the lens unit includes a first lens portion and a second lens portion. The first lens portion and the central area are overlapped, and the first lens portion is used to gather the light emitted from the central area. The second lens portion and the edge area are overlapped, and the second lens portion is used to gather the light emitted from the edge area.

[0013] In an exemplary embodiment of the present disclosure, both the first lens portion and the second lens portion are convex lenses convex in a direction away from the light emitting device.

[0014] In an exemplary embodiment of the present disclosure, the curvature radius of the second lens portion is smaller than the curvature radius of the first lens portion;

[0015] The refractive index of the first lens portion and the refractive index of the second lens portion are the same.

[0016] In an exemplary embodiment of the present disclosure, the second lens portion is a spherical segment structure, and the arch height of the first lens portion is less than or equal to the curvature radius of the second lens portion.

[0017] In an exemplary embodiment of the present disclosure, the refractive index of the second lens portion is greater than the refractive index of the first lens portion;

[0018] The first lens portion has the same curvature radius as the second lens portion.

[0019] In an exemplary embodiment of the present disclosure, the first lens portion includes a plurality of first lenses, and the plurality of first lenses are stacked and distributed in a direction away from the driving back plate;

[0020] And / or, the second lens portion includes a plurality of second lenses, and the plurality of second lenses are stacked and distributed in a direction away from the driving back plate.

[0021] In an exemplary embodiment of the present disclosure, the number of the second lenses corresponding to each light emitting device is greater than the number of the first lenses.

[0022] In an exemplary embodiment of the present disclosure, the central axis of the first lens portion is vertically arranged relative to the driving back plate, and the central axis of the second lens portion is inclined toward the central axis of the first lens portion and is arranged at an angle.

[0023] In an exemplary embodiment of the present disclosure, the display panel further includes:

[0024] a color filter layer, arranged on a side of the light emitting device away from the driving backplane and between the light emitting device and the lens layer;

[0025] The first packaging layer is arranged on a side of the second electrode away from the driving backplane and between the second electrode and the color filter layer.

[0026] In an exemplary embodiment of the present disclosure, the color filter layer is provided with a protruding structure in a direction away from the light emitting device, and the protruding structure and the light emitting device are arranged to overlap.

[0027] In an exemplary embodiment of the present disclosure, the surface of the first encapsulation layer facing the color filter layer has a protrusion, and the orthographic projection of the protrusion on the driving backplane and the orthographic projection of the edge area on the driving backplane at least partially overlap;

[0028] The surfaces of the color filter layer and the first encapsulation layer that are close to each other are bonded to each other.

[0029] In an exemplary embodiment of the present disclosure, the driving backplane includes a driving transistor; the display panel also includes a via for electrically connecting the first electrode to the source or drain of the driving transistor; the orthographic projection of the second lens portion on the driving backplane and the orthographic projection of the via on the driving backplane at least partially overlap.

[0030] In an exemplary embodiment of the present disclosure, the driving backplane includes a driving transistor; the display panel further includes a via hole for electrically connecting the first electrode to a source or a drain of the driving transistor; a curvature radius of a portion of the second lens portion overlapping the via hole is smaller than a curvature radius of a portion of the second lens portion not overlapping the via hole;

[0031] And / or, the refractive index of the second lens portion where it overlaps with the via hole is greater than the curvature radius of the second lens portion where it does not overlap with the via hole.

[0032] In an exemplary embodiment of the present disclosure, the driving backplane includes a driving transistor; the display panel further includes a via hole for electrically connecting the first electrode to a source or a drain of the driving transistor; the display panel further includes a pixel definition layer, the pixel definition layer having an opening through which the first electrode is exposed;

[0033] There is a first distance between the edge of the central area facing the via hole and the edge of the opening;

[0034] There is a second distance between an edge of a central region of the first electrode facing away from the via hole and an edge of the opening;

[0035] The second distance is smaller than the first distance.

[0036] In an exemplary embodiment of the present disclosure, the driving backplane includes a driving transistor; the display panel further includes a via for electrically connecting the first electrode to a source or a drain of the driving transistor; a portion of the first electrode corresponding to the edge region includes a first edge region covered by the pixel definition layer and a second edge region not covered by the pixel definition layer, the second edge region being arranged around the central region and between the central region and the first edge region;

[0037] The second lens portion includes a first lens area and a second lens area, the first lens area and the first edge area are overlapped, and the second lens area and the second edge area are overlapped;

[0038] Wherein, the refractive index of the first lens portion is smaller than the refractive index of the second lens area; and / or the curvature radius of the first lens portion is larger than the curvature radius of the second lens area.

[0039] In a display panel provided by an embodiment of the present disclosure, a lens layer is disposed on the side of the light-emitting device away from the driver backplane. The lens layer is a film layer that has the function of expanding the range of light irradiation. A first lens portion overlaps with a central region, corresponding to a strong microcavity region. The first lens portion is used to focus light emitted from the central region. The first lens portion improves the luminous efficiency of the core light-emitting region, achieving a high-brightness effect. A second lens portion overlaps with an edge region, corresponding to a weak microcavity region. The second lens portion is used to focus light emitted from the edge region, improving the utilization rate of stray light and reducing the edge effect of the strong microcavity structure. In this manner, the first and second lens portions are used to match the central and edge regions to correct light for the different luminous intensities, effectively collecting stray light and improving luminous efficiency. Because the edge region surrounds the central region and the second lens portion surrounds the first lens portion, light wave interference is effectively controlled from the central region outward to the edge region, achieving a stronger and wider microcavity effect, improving brightness viewing angle and color purity, and thereby enhancing the brightness and display uniformity of silicon-based OLED displays.

[0040] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The above and other features and advantages of the present disclosure will become more apparent by describing in detail example embodiments thereof with reference to the accompanying drawings.

[0042] FIG1 shows a schematic plan view of a display panel according to an embodiment of the present disclosure.

[0043] FIG2 shows a schematic structural diagram of a sub-pixel in a display panel according to an embodiment of the present disclosure.

[0044] FIG3 shows a schematic structural diagram of a light-emitting device in a display panel according to an embodiment of the present disclosure.

[0045] FIG4 shows a schematic structural diagram of a light-emitting device and a lens layer in a display panel according to an embodiment of the present disclosure.

[0046] FIG5 is a schematic diagram showing a light path of a first lens portion in a display panel according to an embodiment of the present disclosure.

[0047] FIG6 is a schematic diagram showing a light path of a second lens portion in a display panel according to an embodiment of the present disclosure.

[0048] FIG7 shows a schematic structural diagram of a light-emitting device and a lens layer in a display panel according to another embodiment of the present disclosure.

[0049] FIG8 is a schematic diagram showing a light path of a first lens portion in a display panel according to another embodiment of the present disclosure.

[0050] FIG9 is a schematic diagram showing the light path of the second lens portion in a display panel according to another embodiment of the present disclosure.

[0051] FIG10 shows a schematic structural diagram of a light-emitting device and a lens layer in a display panel according to another embodiment of the present disclosure.

[0052] FIG11 shows a schematic structural diagram of a light-emitting device and a lens layer in a display panel according to another embodiment of the present disclosure.

[0053] FIG12 shows a schematic structural diagram of a light-emitting device and a lens layer in a display panel according to another embodiment of the present disclosure.

[0054] FIG13 shows a schematic structural diagram of a light-emitting device and a lens layer in a display panel according to another embodiment of the present disclosure.

[0055] FIG14 shows a plan view of a sub-pixel according to an embodiment of the present disclosure.

[0056] FIG. 15 is a schematic diagram showing a display panel in which a via hole is located inside an opening according to an embodiment of the present disclosure.

[0057] FIG. 16 is a schematic diagram showing a display panel in which a via hole is located outside an opening according to an embodiment of the present disclosure.

[0058] FIG17 shows a first plan view schematically illustrating the central area and edge area of ​​a display panel according to an embodiment of the present disclosure.

[0059] FIG18 shows a second plan view schematically showing the central area and edge area of ​​a display panel according to an embodiment of the present disclosure.

[0060] FIG19 shows a cross-sectional view of a non-display area of ​​a display panel according to an embodiment of the present disclosure. 100. Display panel; 10. Substrate; 20. Driver backplane; 201. Buffer layer; 202. First gate insulating layer; 203. Second gate insulating layer; 204. Interlayer dielectric layer; 205. Passivation layer; 206. Planarization layer; 30. Light-emitting device; 31. First electrode; 311. Reflective layer; 312. Transparent conductive layer; 313. Dielectric layer; 32. Light-emitting layer; 33. Second electrode; 331. First light-transmitting layer; 332. Second light-transmitting layer; 301. Central region; 302. Edge region; 3021. First edge region; 3022. Second edge region; 40. Lens layer; 41. First lens portion; 42. Second lens portion; 421. First lens region; 422. Second lens region; 423. Third lens region; 50. Color filter layer; 51. Protrusion structure; 60. First encapsulation layer; 61. Protrusion; 70. Second encapsulation layer; 80. Pixel definition layer; 81. Covering portion; 82. Non-covering portion; OP, opening; VIA, via. DETAILED DESCRIPTION

[0061] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of the illustrations to another component, these terms are used in this specification only for convenience, such as the orientation of the examples described in the accompanying drawings. It will be understood that if the device of the illustrations is flipped so that it is upside down, the component described as "upper" will become the component "lower". Other relative terms such as "top" and "bottom" are also used to have similar meanings. When a structure is "on" another structure, it may mean that the structure is formed integrally on the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

[0062] The terms "a", "an", "the" and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express open-ended inclusion and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc.; the terms "first", "second", etc. are used only as labels and do not limit the quantity of their objects.

[0063] FIG1 shows a schematic plan view of a display panel 100 according to an embodiment of the present disclosure.

[0064] As shown in Figure 1, the display panel 100 includes a base substrate 10 and a plurality of sub-pixels Px arranged on the base substrate 10. The plurality of sub-pixels Px are arranged in the form of an array, that is, the plurality of sub-pixels Px are arranged in N rows and M columns. The display panel 100 may also be provided with a plurality of gate lines G1, G2, ... GN electrically connected to the plurality of sub-pixels Px. The display panel 100 may also be provided with a plurality of data lines D1, D2, ... DM electrically connected to the plurality of sub-pixels Px. In Figure 1, N rows of sub-pixels Px are connected to N gate lines G1, G2, ... GN in a one-to-one correspondence, and M columns of sub-pixels Px are connected to M data lines D1, D2, ... DM in a one-to-one correspondence, that is, each row of sub-pixels is connected to a gate line, and each column of sub-pixels is connected to a data line. However, the embodiments of the present disclosure are not limited thereto, and the number and connection method of the gate lines and data lines can be selected as needed. For example, two gate lines can be connected to each row of sub-pixels, and the number of gate lines is twice the number of sub-pixel rows; or one data line can be connected to every two columns of sub-pixels, and the number of data lines is half the number of sub-pixel columns, and so on.

[0065] During operation, the gate drive circuit applies gate drive signals to gate lines G1 to GN to turn on each row of sub-pixels Px. The source drive circuit applies source drive signals to data lines D1 to DM to cause the turned-on sub-pixels Px to display according to the applied source drive signals. In some embodiments, the display panel 100 may further include multiple emission control lines connected to the multiple sub-pixels. The emission drive circuit provides emission control signals to the multiple sub-pixels via the multiple emission control lines.

[0066] FIG. 2 shows a cross-sectional view of a sub-pixel in the display panel 100 according to an embodiment of the present disclosure.

[0067] As shown in FIG2 , at least one of the multiple sub-pixels in the display panel 100 includes a driving backplane 20, which includes a driving transistor having a gate G, a source S, and a drain D. The driving transistor may further include an active layer P-Si located on a base substrate 10, with the gate G located on a side of the active layer P-Si away from the base substrate 10. The driving transistor may further include a first gate insulating layer 202 located between the active layer P-Si and the gate G, a second gate insulating layer 203 located on a side of the gate G away from the base substrate 10, and an interlayer dielectric layer 204 located on a side of the second gate insulating layer 203 away from the base substrate 10. The source S and drain D are located on a side of the interlayer dielectric layer 204 away from the base substrate 10.

[0068] As shown in FIG2 , the sub-pixel further includes a light-emitting device 30, which is located on a side of the driving transistor away from the substrate 10. The light-emitting device 30 includes a first electrode 31, a second electrode 33, and a light-emitting layer 32 located between the first electrode 31 and the second electrode 33. The first electrode 31 is electrically connected to the source S or the drain D of the driving transistor. In some embodiments, the first electrode 31 may be an anode, and the second electrode 33 may be a cathode.

[0069] As shown in Figures 2 and 3, the first electrode 31 can be a multi-layer structure. Specifically, the first electrode 31 includes a reflective layer 311, a transparent conductive layer 312, and a dielectric layer 313 located between the reflective layer 311 and the transparent conductive layer 312. The transparent conductive layer 312 is disposed on the side of the reflective layer 311 away from the driving backplane 20. The material of the transparent conductive layer 312 includes, but is not limited to, indium tin oxide. The reflective layer 311 can be a single material layer or a composite material layer. The materials of each layer of the composite material layer include, but are not limited to, Ti, TiN, or Al2O3, etc.

[0070] The second electrode 33 may also be a multi-layer structure. The second electrode 33 includes a first light-transmitting layer 331 and a second light-transmitting layer 332 stacked in a direction away from the backplane. The first light-transmitting layer 331 is arranged on the side of the light-emitting layer 32 away from the driving backplane 20. The transmittance of the first light-transmitting layer 331 is less than the transmittance of the second light-transmitting layer 332. The second light-transmitting layer 332 can be called a fully transparent layer, and the first light-transmitting layer 331 can be called a semi-transparent layer. The first light-transmitting layer 331 can optionally adopt a metal film layer made of MgAg. The reflectivity of the first light-transmitting layer 331 is 30% to 80%. The transmittance and reflectivity of the first light-transmitting layer 331 can be controlled by the thickness of the film layer. The thickness of the first light-transmitting layer 331 is For example, the thickness of the first light-transmitting layer 331 can be selected to be wait.

[0071] In some embodiments, as shown in FIG2 , the sub-pixel may further include a planarization layer 206. The planarization layer 206 is located on a side of the interlayer dielectric layer 204 away from the substrate 10. The first electrode 31 is located on a side of the planarization layer 206 away from the substrate 10 and is connected to the source S or the drain D through the planarization layer 206.

[0072] In some embodiments, the sub-pixel may further include a buffer layer 201 , which is located between the base substrate 10 and the first gate insulating layer 202 , and the active layer P-Si of the driving transistor is located between the buffer layer 201 and the first gate insulating layer 202 .

[0073] In some embodiments, the sub-pixel may further include a passivation layer 205 , which is located between the planar layer 206 and the interlayer dielectric layer 204 and covers the source S and drain D of the driving transistor. The first electrode 31 passes through the interlayer dielectric layer 204 and the passivation layer 205 and is connected to the source S of the driving transistor.

[0074] As shown in FIG3 , the reflective layer 311 in the first electrode 31 and the second electrode 33 form an optical cavity. The cavity length of the optical cavity is the distance between the reflective layer 311 of the first electrode 31 and the second electrode 33 in a direction perpendicular to the substrate 10. When the cavity length h of the optical cavity satisfies the following equation:

[0075] Where h is the cavity length, n is a positive integer, N is the effective refractive index in the microcavity, and λ is the central wavelength of the corresponding sub-pixel. The outgoing light with the central wavelength of the sub-pixel is enhanced due to constructive interference, that is, the brightness is improved.

[0076] Typically, due to limitations in the manufacturing process, the actual cavity length of the edge region 302 of the first electrode 31 may deviate from that of the central region 301 to a certain extent, resulting in:

[0077] λ′≠λ, that is, the central wavelength of the edge region 302 deviates from the central wavelength of the central region 301 , which will cause color deviation at the edge of the sub-pixel.

[0078] Specifically, the portion of the reflective layer 311 of the first electrode 31 located in the central region 301 forms a first optical cavity with the second electrode 33. This first optical cavity can be referred to as a strong microcavity region. The portion of the reflective layer 311 of the first electrode 31 located in the edge region 302 forms a second optical cavity with the second electrode 33. This second optical cavity can be referred to as a weak microcavity region.

[0079] Existing traditional OLED devices are relatively large in size. For example, the subpixel size of a mobile phone-sized OLED is tens of μm, while the subpixel size of a large-sized OLED is even over 100 μm. The edge region 302 of the subpixel occupies a relatively small proportion of the entire display area, and the impact of the edge effect can be ignored. However, the subpixel size of a silicon-based OLED is extremely small, and the ratio of the orthographic projection area of ​​the edge region 302 on the driver backplane 20 to the orthographic projection area of ​​the center region 301 on the driver backplane 20 is 5% to 20%. For example, the size of a silicon-based OLED subpixel is generally 5 to 10 μm. Such a small size results in the edge region 302 occupying a relatively large proportion relative to the center region 301. At this time, the microcavity effect of the subpixel edge region 302 differs significantly from the microcavity effect of the center region 301, resulting in color deviation at the subpixel edge, seriously affecting the display effect.

[0080] As shown in Figure 4, the display panel 100 of the present disclosure includes a driving backplane 20, a light-emitting device 30 and a lens layer 40. The light-emitting device 30 includes a first electrode 31, a light-emitting layer 32, and a second electrode 33 stacked in sequence in a direction away from the driving backplane 20. The light-emitting device 30 has a central area 301 and an edge area 302 surrounding the central area 301; the lens layer 40 is arranged on a side of the light-emitting device 30 away from the driving backplane 20, and the lens layer 40 includes a plurality of lens units, where one lens unit and one light-emitting device 30 are overlapped, and the lens unit includes a first lens portion 41 and a second lens portion 42. The first lens portion 41 is overlapped with the central area 301, and the first lens portion 41 is used to gather light emitted from the central area 301. The second lens portion 42 is overlapped with the edge area 302, and the second lens portion 42 is used to gather light emitted from the edge area 302.

[0081] In the display panel 100 provided in this embodiment, the lens layer 40 is arranged on the side of the light-emitting device 30 away from the driving backplane 20. The lens layer 40 is a film layer that has the function of expanding the range of light irradiation. The first lens portion 41 and the central area 301 are overlapped, and the central area 301 corresponds to the strong microcavity area. The first lens portion 41 is used to focus the light emitted from the central area 301. By using the first lens portion 41, the luminous efficiency of the core light-emitting area is improved, and a high-brightness effect can be achieved. The second lens portion 42 and the edge area 302 are overlapped, and the edge area 302 corresponds to the weak microcavity area. The second lens portion 42 is used to focus the light emitted from the edge area 302, which can improve the utilization rate of stray light and reduce the edge effect of the strong microcavity structure.

[0082] In this way, the first lens portion 41 and the second lens portion 42 are used to match the different luminous intensities of the central area 301 and the edge area 302, respectively, to correct light, effectively collect stray light, and improve luminous efficiency. Because the edge area 302 is arranged around the central area 301, and the second lens portion 42 is arranged correspondingly around the first lens portion 41, the interference of light waves from the luminous central area 301 outward to the edge area 302 is effectively controlled, achieving a strong and wide-range microcavity effect, improving brightness, viewing angle, and color purity, thereby enhancing the brightness and display uniformity of silicon-based OLED displays.

[0083] In one embodiment, as shown in FIG. 4 , the first lens portion 41 and the second lens portion 42 are both convex lenses that bulge 61 in a direction away from the light emitting device 30 .

[0084] Convex lenses are made based on the principle of light refraction. Specifically, they are thicker in the center and thinner at the edges. They converge light. According to the imaging principle and optical path diagram of convex lenses, the first lens portion 41 converges light emitted from the central region 301, while the second lens portion 42 converges light emitted from the edge region 302.

[0085] In one embodiment, as shown in Figures 4 to 6, the focal length of the second lens portion 42 is smaller than the focal length of the first lens portion 41, so that the light converging effect of the second lens portion 42 is greater than the light converging effect of the first lens portion 41, so as to achieve a stronger and larger range of microcavity effects, and effectively improve the light utilization rate within the weak microcavity range.

[0086] It can be understood that the distance between the light incident surface of the lens layer 40 and the light emitting surface of the light emitting layer 32 can be set to the focal length of the lens layer 40. For example, the distance between the lens layer 40 and the light emitting layer 32 can be selected as the focal length of the second lens portion 42 to further improve the brightness effect.

[0087] In one embodiment, as shown in FIG. 4 to FIG. 6 , the curvature radius of the second lens portion 42 is smaller than the curvature radius of the first lens portion 41 ; the refractive index of the first lens portion 41 is the same as the refractive index of the second lens portion 42 .

[0088] The radius of curvature is primarily used to describe the degree of curvature of a curve at a certain point. For example, if the degree of curvature is the same at all points on a circle, then the radius of the circle is the radius of the circle. If a straight line is not curved, then the line has no radius of curvature. If a point on a curve has the same curvature as the corresponding circle, then the radius of curvature at that point on the curve is the radius of the circle. If the circle is larger, the curvature is smaller, and the closer it is to a straight line, then the larger the circle, the smaller the curvature, and the larger the radius of curvature.

[0089] According to the different areas of the central area 301 and the edge area 302, lens portions with different curvature radii are matched. When the refractive index of the first lens portion 41 and the second lens portion 42 is the same, the central area 301 is matched with the first lens portion 41 with a larger curvature radius, and the edge area 302 is matched with the second lens portion 42 with a smaller curvature radius. Since the curvature radius of the second lens portion 42 is smaller, it means that the second lens portion 42 is more curved than the first lens portion 41, and the light converging ability of the second lens portion 42 is also stronger, thereby improving the utilization rate of stray light, reducing the edge effect of the strong microcavity area, achieving a stronger and larger range of microcavity effects, improving the brightness viewing angle and color purity, and increasing the brightness change rate under a wider viewing angle, thereby improving the uniformity of display brightness.

[0090] In one embodiment, the second lens portion 42 is a spherical segment structure, and the arch height of the first lens portion 41 is less than or equal to the curvature radius of the second lens portion 42 .

[0091] The spherical segment structure is a portion of a sphere cut off by a plane. The cross section is called the bottom surface of the spherical segment structure. After the diameter perpendicular to the cross section is cut off, the remaining line segment length is called the arch height of the spherical segment structure. Since the strong microcavity region optically matches the arc-shaped morphology with a larger curvature radius, the curvature radius R1 of the first lens portion 41 is greater than the curvature radius r of the sphere, and the arch height of the first lens portion 41 is less than or equal to the curvature radius r of the sphere. Since the weak microcavity region optically matches the arc-shaped morphology with a smaller curvature radius, the second lens portion 42 can be a portion of the sphere or contained within the sphere. Therefore, the curvature radius R2 of the second lens portion 42 is less than or equal to the curvature radius r of the sphere, and the arch height of the second lens portion 42 is less than or equal to the curvature radius r of the sphere.

[0092] In one embodiment, as shown in FIG. 7 to FIG. 9 , the refractive index of the second lens portion 42 is greater than the refractive index of the first lens portion 41 ; the curvature radius of the first lens portion 41 is the same as the curvature radius of the second lens portion 42 .

[0093] The refractive index refers to the ratio of the speed of light in a vacuum to the speed of light in the medium. The higher the refractive index of a material, the stronger its ability to refract incident light. According to the different areas of the central area 301 and the edge area 302, lens portions with different refractive indices are matched. When the curvature radius of the first lens portion 41 and the second lens portion 42 are the same, the central area 301 is matched with the first lens portion 41 with a smaller refractive index, and the edge area 302 is matched with the second lens portion 42 with a larger refractive index. Since the refractive index of the second lens portion 42 is relatively large, it means that the refractive power or refractive intensity of the second lens portion 42 is stronger than that of the first lens portion 41 when refraction occurs, and the light converging ability of the second lens portion 42 is also stronger, thereby improving the utilization rate of stray light, reducing the edge effect of the strong microcavity area, achieving a stronger and larger range of microcavity effects, improving the brightness viewing angle and color purity, and increasing the brightness change rate under a wider viewing angle, thereby improving the uniformity of the display brightness.

[0094] It is understood that the focal length of a convex lens is related to the refractive index of the lens material, the ambient refractive index of the lens, and the radius of curvature of the lens. A larger radius of curvature results in a larger focal length, a smaller refractive index, and a smaller magnification. A smaller radius of curvature results in a smaller focal length, a larger refractive index, and a larger magnification. Of course, the shape of the lens layer 40 can be designed so that its focal point is precisely located on the light-emitting layer 32, further enhancing the brightness of the lens.

[0095] In one embodiment, the refractive index of the first lens portion 41 is n1, and the refractive index of the second lens portion 42 is n2, wherein 1.2≤n1≤1.4, 1.41≤n2≤1.56. For example, n1 can be 1.2, 1.3, 1.4, etc., and n2 can be 1.41, 1.5, 1.56, etc.

[0096] In one embodiment, as shown in Figure 10, the first lens portion 41 includes a plurality of first lenses, and the plurality of first lenses are stacked and distributed in a direction away from the driving back plate 20; and / or, the second lens portion 42 includes a plurality of second lenses, and the plurality of second lenses are stacked and distributed in a direction away from the driving back plate 20.

[0097] For example, two first lenses are stacked perpendicular to the driving backplane 20, with the first lens portion 41 having a double-layer lens structure, improving the luminous efficiency of the central region 301 as the core luminous area. Two second lenses are stacked perpendicular to the driving backplane 20, with the second lens portion 42 having a double-layer lens structure, improving the collection efficiency of the edge region 302 as the stray light region, reducing the edge effect of the strong microcavity region, and thus improving the efficiency of the strong microcavity region.

[0098] It is understandable that this embodiment does not limit the specific number of the first lens and the second lens, and the specific number can be adjusted according to actual production conditions.

[0099] In one embodiment, as shown in FIG11 , the number of second lenses corresponding to each light emitting device 30 is greater than the number of first lenses.

[0100] For example, within the range corresponding to a light-emitting device 30, the number of first lenses is one and the number of second lenses is two, that is, the lens corresponding to the central area 301 is a single-layer structure, and the lens corresponding to the edge area 302 is a double-layer structure. This enables the second lens portion 42 to better converge the stray light emitted from the edge area 302, further improving the utilization rate of the stray light and reducing the edge effect of the strong microcavity area.

[0101] In one embodiment, the central axis of the first lens portion 41 is perpendicular to the driving back plate 20 , and the central axis of the second lens portion 42 is inclined toward the central axis of the first lens portion 41 and is arranged at an angle.

[0102] In this way, the side of the first lens facing the light-emitting device 30 is arranged parallel to the driving backplane 20, and the side of the second lens facing the light-emitting device 30 is arranged at an angle to the driving backplane 20, that is, the central axis of the second lens is inclined toward the direction close to the first lens, so that the central axis of the second lens converges toward the central axis of the first lens, so that the second lens can converge the light emitted from the edge area 302 toward the center area 301, thereby playing the role of edge compensation, reducing the edge effect of the strong microcavity area, and effectively improving the luminous efficiency.

[0103] In one embodiment, as shown in FIG. 11 , the display panel 100 further includes a color filter layer 50 . The color filter layer 50 is disposed on a side of the light emitting device 30 away from the driving backplane 20 and between the light emitting device 30 and the lens layer 40 .

[0104] The color filter layer 50 can be formed by replicating and shifting multiple RGB small units. That is, the multiple sub-pixels in the display panel 100 can include sub-pixels of different colors, such as a first sub-pixel Pxr, a second sub-pixel Pxg, and a third sub-pixel Pxb of different colors. In some embodiments, the first sub-pixel Pxr can be a red sub-pixel, the second sub-pixel Pxg can be a green sub-pixel, and the third sub-pixel Pxb can be a blue sub-pixel. Each sub-pixel can independently control the intensity of light passing through it. After combining RGB color lights of different levels of intensity, a color display can be achieved. Adjacent sub-pixels are separated by a black matrix.

[0105] The lens layer 40 can be directly arranged on the color filter layer 50. Of course, in some embodiments, a planarization layer is provided on the side of the color filter layer 50 away from the driving backplane 20, and the lens layer 40 is arranged on the side of the planarization layer away from the color filter layer 50 to ensure the planarization effect of the lens layer 40.

[0106] In one embodiment, the display panel 100 further includes a first encapsulation layer 60, which is disposed on a side of the second electrode 33 away from the driving backplane 20 and between the second electrode 33 and the color filter layer 50. The first encapsulation layer 60 serves to isolate the second electrode 33 and the color filter layer 50 and, to a certain extent, provides protection. The first encapsulation layer 60 may include a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked in sequence.

[0107] In one embodiment, as shown in FIG. 12 , the color filter layer 50 is provided with a protruding structure 51 protruding in a direction away from the light emitting device 30 , and the protruding structure 51 and the light emitting device 30 are arranged to overlap.

[0108] Due to the optical properties of the color filter layer 50, the shape of the color filter layer 50 can be further expanded. The protruding structure 51 is arranged to protrude toward the lens layer 40, making the color filter layer 50 somewhat similar to a convex lens structure. The orthographic projection of the protruding structure 51 on the driver backplane 20 and the orthographic projection of the light-emitting device 30 on the driver backplane 20 at least partially overlap, allowing the protruding structure 51 to correspond to the central region 301 and / or the edge region 302. This can converge the light emitted from the central region 301 and / or the edge region 302, thereby reducing the edge effect of the strong microcavity area.

[0109] In one embodiment, as shown in FIG13 , the surface of the first encapsulation layer 60 facing the color filter layer 50 has a protrusion 61 , and the orthographic projection of the protrusion 61 on the driving backplane 20 and the orthographic projection of the edge area 302 on the driving backplane 20 at least partially overlap; the surfaces of the color filter layer 50 and the first encapsulation layer 60 that are close to each other are bonded to each other.

[0110] Since the color filter layer 50 is made of resin material using a spin coating process, it is not easy to control the color filter layer 50 within a sub-pixel. A protrusion 61 is provided at the position corresponding to the edge area 302 of the first encapsulation layer 60. The protrusion 61 can specifically be a partial curved surface of a sphere. The surfaces of the color filter layer 50 and the first encapsulation layer 60 that are close to each other contact and adhere to each other. The color filter layer 50 can inherit the morphology, so that the color filter layer 50 forms a convex lens behind the protrusion 61 of the first encapsulation layer 60. The color filter layer 50 and the first encapsulation layer 60 adopt a complementary design, so that the color filter layer 50 and the first encapsulation layer 60 maintain consistent undulations, reducing the difficulty of production and processing while also converging the light emitted from the edge area 302, reducing the edge effect of the strong microcavity area, and achieving a high brightness effect.

[0111] In one embodiment, as shown in Figures 4 to 13, the display panel 100 further includes a second encapsulation layer 70, which is disposed on a side of the lens layer 40 away from the driving backplane 20, and the color filter layer 50 is disposed between the first encapsulation layer 60 and the second encapsulation layer 70.

[0112] The color filter layer 50 is sandwiched between the first encapsulation layer 60 and the second encapsulation layer 70 to cover and protect the lens layer 40 , making it easier to form other structures such as polarizers and touch panel lights on the side of the lens layer 40 away from the driving backplane 20 .

[0113] The refractive index of the second encapsulation layer 70 is lower than that of the lens layer 40. The lens layer 40 is an optically denser medium, while the second encapsulation layer 70 is an optically less dense medium. Due to the principle of light refraction, light emitted from the light-emitting layer 32 is refracted upon passing through the boundary between the optically denser and optically less dense media, thereby amplifying the light in the display area and reducing black borders, thereby facilitating the provision of a display module structure with a larger screen-to-body ratio.

[0114] Specifically, the material of the lens layer 40 may preferably be a negative photoresist with a higher refractive index. Since negative photoresist generally has a higher hardness and a longer life, a material that increases the refractive index may be added to the negative photoresist to further increase the refractive index of the lens layer 40 .

[0115] In one embodiment, as shown in Figures 14 to 16, the display panel 100 further includes a via VIA for electrically connecting the first electrode 31 to the source or drain of the driving transistor; the orthographic projection of the edge area 302 on the driving backplane 20 and the orthographic projection of the via VIA on the driving backplane 20 at least partially overlap.

[0116] It can be understood that, generally in the area close to the via VIA, the first electrode 31 will appear uneven, and a more serious edge effect will occur. The edge area 302 and the via VIA are overlapped to reduce the impact on the central area 301 as the core light-emitting area. At the same time, the areas where edge effects are prone to occur are concentrated, which facilitates the unification of the lens layer 40 and concentrates on weakening the edge effect, thereby effectively improving the light-emitting efficiency.

[0117] In one embodiment, the orthographic projection of the second lens portion 42 on the driving backplate 20 and the orthographic projection of the via hole VIA on the driving backplate 20 at least partially overlap.

[0118] The second lens portion 42 and the via hole VIA are overlapped, that is, the second lens portion 42 is a lens close to the via hole VIA area. Since the area near the via hole VIA is more uneven, it is more likely to have an edge effect. The second lens portion 42 is used to converge stray light, increase edge brightness, and further improve brightness uniformity, thereby improving the display effect.

[0119] In one embodiment, a curvature radius of a portion of the second lens portion 42 overlapping the via hole VIA is smaller than a curvature radius of a portion of the second lens portion 42 not overlapping the via hole VIA.

[0120] Different areas are divided according to whether they overlap with the via hole VIA, and second lens portions 42 with different curvature radii are matched. Under the same refractive index, the first lens portion 41 with a larger curvature radius is matched with the non-overlapping portion with the via hole VIA, and the second lens portion 42 with a smaller curvature radius is matched with the overlapping portion with the via hole VIA. The second lens portion 42 with a smaller curvature radius means a greater degree of curvature and a stronger light converging ability, which improves the utilization rate of stray light, compensates for the edge effect caused by the unevenness caused by the via hole VIA, increases edge brightness, and further improves the uniformity of display.

[0121] In one embodiment, the refractive index of the second lens portion 42 overlapping the via hole VIA is greater than the curvature radius of the second lens portion 42 not overlapping the via hole VIA.

[0122] Different areas are divided according to whether they overlap with the via hole VIA, and second lens portions 42 with different refractive indices are matched. Under the same curvature radius, the first lens portion 41 with a smaller refractive index is matched with the portion that does not overlap with the via hole VIA, and the second lens portion 42 with a larger refractive index is matched with the portion that overlaps with the via hole VIA. The second lens portion 42 with a larger refractive index means that the refractive power or refractive intensity is stronger when refraction occurs, and the light converging ability of the second lens portion 42 is also stronger, thereby improving the utilization rate of stray light, compensating for the edge effect caused by the unevenness caused by the via hole VIA, increasing the edge brightness, and further improving the uniformity of the display.

[0123] In one embodiment, as shown in Figures 4 to 13 , the display panel 100 further includes a pixel definition layer 80 having an opening OP (as shown in Figures 15 and 16 ) through which the first electrode 31 is exposed. The opening OP allows the final light emission direction to be as close as possible to a direction perpendicular to the driving backplane 20 , thereby enhancing the brightness enhancement effect of the lens layer 40 on the light-emitting device 30 . Of course, within each sub-pixel, the via hole VIA may be located inside or outside the opening OP.

[0124] In one embodiment, there is a first distance between the edge of the central area 301 facing the via VIA and the edge of the opening OP; there is a second distance between the edge of the central area 301 of the first electrode 31 facing away from the via VIA and the edge of the opening OP of the sub-pixel; wherein the second distance is smaller than the first distance.

[0125] Specifically, as shown in FIG15 , when the via VIA is located inside the opening OP, a first distance d1 is defined between the edge of the center region 301 facing the via VIA and the edge of the opening OP, and a second distance d2 is defined between the edge of the center region 301 facing away from the via VIA and the edge of the opening OP. The second distance d2 is less than the first distance d1, i.e., d1>d2. Similarly, when the via VIA is located outside the opening OP, as shown in FIG16 , a first distance d1' is defined between the edge of the center region 301 facing the via VIA and the edge of the opening OP, and a second distance d2' is defined between the edge of the center region 301 facing away from the via VIA and the edge of the opening OP. Similarly, d1'>d2' is defined between the edge of the center region 301 facing the via VIA and the edge of the opening OP.

[0126] Because the first electrode 31 will be uneven near the via hole VIA, a more severe edge effect will occur. In the embodiment of the present disclosure, the distance from the side of the central area 301 near the via hole VIA to the edge of the opening OP area is set to be greater than the distance from the side away from the via hole VIA to the edge, which can further improve the display uniformity of the sub-pixel area.

[0127] In one embodiment, when the via VIA is located inside the opening OP, the first distance and the second distance have a first ratio; when the via VIA is located outside the opening OP, the first distance and the second distance have a second ratio; wherein the first ratio is greater than the second ratio.

[0128] Compared with the case where the via hole VIA is located outside the opening OP area, the edge effect in the display area will be more obvious when the via hole VIA is located inside the opening OP area. The embodiment of the present disclosure can ensure the display uniformity between sub-pixels with the via hole VIA located at different positions by making d1 / d2>d1' / d2'.

[0129] In one embodiment, as shown in Figures 7, 17 and 18, the portion of the first electrode 31 corresponding to the edge area 302 includes a first edge area 3021 covered by the pixel definition layer 80 and a second edge area 3022 not covered by the pixel definition layer 80, and the second edge area 3022 is arranged around the central area 301 and between the central area 301 and the first edge area 3021; ​​the second lens portion 42 includes a first lens area 421 and a second lens area 422, the first lens area 421 and the first edge area 3021 are overlapped, and the second lens area 422 and the second edge area 3022 are overlapped.

[0130] The portion of the first electrode 31 corresponding to the edge region 302 can be configured to include multiple nested annular sub-regions. For example, the second edge region 3022 surrounds the central region 301, and the first edge region 3021 surrounds the second edge region 3022. Of course, the number of sub-edge regions 302 is not limited to this, and more annular sub-regions can be provided as needed. According to embodiments of the present disclosure, the structure of the lens layer 40 in adjacent sub-regions can be designed in a manner similar to the above-mentioned edge region 302 and central region 301, thereby realizing different microcavity compensation structures in adjacent sub-regions.

[0131] It is understood that the outer contours of each sub-region, such as the central region 301, the first edge region 3021, and the second edge region 3022, are similar shapes, for example, all hexagonal shapes (as shown in FIG17 ). Alternatively, the outer contours of the central region 301, the first edge region 3021, and the second edge region 3022 are circular, and the outer contours of the sub-pixels are hexagonal shapes (as shown in FIG18 ). However, the embodiments of the present disclosure are not limited thereto, and the outer contours of the central region 301 and each sub-region can be configured to other shapes as needed. For example, the edge region 302 can be arranged in a petal-shaped ring around the central region 301.

[0132] In some embodiments, the area of ​​the central region 301 can be larger than the areas of the first edge region 3021 and the second edge region 3022, and among the multiple annular subregions, the annular subregions closer to the central region 301 have larger areas. For example, the second edge region 3022 is closer to the central region 301 than the first edge region 3021, so the area of ​​the second edge region 3022 is larger than the area of ​​the first edge region 3021. For the outermost subregion, the area of ​​the first edge region 3021 can be calculated based on the area of ​​the portion covered by the pixel definition layer 80. In this way, the edge microcavity effect of the silicon-based OLED can be precisely compensated.

[0133] When the edge portion of the first electrode 31 corresponding to the opening OP is not covered by the pixel definition layer 80, although the cavity length is the same as the central area 301, the evaporation shadow effect will still cause color deviation. Depending on whether it is covered by the pixel definition layer 80, the range of the edge area 302 is further divided. From the center of the sub-pixel outward, the central area 301, the second edge area 3022, and the first edge area 3021 are arranged in sequence and nested with each other. The second edge area 3022 is closer to the central area 301 and will be affected by the evaporation shadow when the light is emitted, resulting in distortion. The first edge area 3021 is farther away from the central area 301, and the pixel definition layer 80 covers the first edge area 3021 of the first electrode 31, resulting in unevenness at the position of the sub-pixel corresponding to the first edge area 3021.

[0134] To this end, the refractive index of the first lens portion 41 is different from the refractive index of the first lens area 421 and the refractive index of the second lens area 422; and / or the curvature radius of the first lens portion 41 is different from the refractive index of the first lens area 421 and the curvature radius of the second lens area 422.

[0135] In the embodiments disclosed herein, the refractive index and / or curvature radius of the first lens portion 41 differs from the refractive index of the first lens area 421 and the second lens area 422 to achieve different focusing effects, further compensating for this color shift and light convergence effect. Furthermore, this also reduces, to a certain extent, the reliance of the strong microcavity area on maximizing the aperture OP.

[0136] In one embodiment, the refractive index of the first lens portion 41 is smaller than the refractive index of the second lens area 422 ; and / or the curvature radius of the first lens portion 41 is larger than the curvature radius of the second lens area 422 .

[0137] The first lens portion 41 is used to converge light emitted from the central area 301, and the second lens area 422 is used to converge light emitted from the second edge area 3022. Since the second lens area 422 is closer to the central area 301, by changing the optical parameters of the first lens portion 41 and the second lens area 422, for example, by increasing the refractive intensity of the second lens area 422 and / or increasing the curvature of the second lens area 422, the light converging ability is improved, light path correction is achieved, edge brightness is increased, and brightness uniformity is further improved, thereby changing the display effect.

[0138] In one embodiment, as shown in Figure 19, the pixel definition layer 80 includes a covering portion 81 covering the first electrodes 31 of adjacent sub-pixels and a non-covering portion 82 located between the first electrodes 31 of adjacent sub-pixels; the second lens portion 42 includes a third lens area 423, and the third lens area 423 and the non-covering portion 82 are overlapped; wherein the refractive index of the first lens portion 41 is less than the refractive index of the third lens area 423; and / or the curvature radius of the first lens portion 41 is greater than the curvature radius of the third lens area 423.

[0139] It is understood that the area of ​​the first electrode 31 not covered by the pixel definition layer 80 is the opening area, which can also be referred to as the display area. The pixel definition layer 80 covers the edges of the first electrodes 31 of two adjacent sub-pixels. The covered portion 81 and the uncovered portion 82 of the pixel definition layer 80 are interconnected and can be collectively referred to as the non-display area. The lens layers 40 of two adjacent sub-pixels are connected, and the third lens area 423 of the second lens portion 42 and the uncovered portion 82 are arranged to overlap. This can be similar to the microcavity compensation design of the above-mentioned embodiment. That is, by changing the optical parameters of the first lens portion 41 and the third lens area 423, for example, increasing the refractive intensity and / or increasing the curvature of the third lens area 423, the light convergence ability is improved, the light path is corrected, the edge brightness is increased, and the brightness uniformity is further improved, thereby changing the display effect.

[0140] An embodiment of the present disclosure further provides a display device, comprising the display panel 100 according to any of the above embodiments.

[0141] The display device according to the embodiment of the present disclosure may be an electronic device with a display function. For example, but not limited to, a smart phone, a mobile phone, a video phone, an e-book reader, a desktop computer (PC), a laptop PC, a netbook PC, a personal digital assistant (PDA), a portable multimedia player (PMP), a digital audio player, a mobile medical device, a camera, a wearable device (such as a head-mounted device, an electronic clothing, an electronic bracelet, an electronic necklace, an electronic accessory, an electronic tattoo, or a smart watch), etc. The display device according to the embodiment of the present disclosure may also be an AR / VR display device, such as a helmet display, a stereo display mirror, and a glasses-type display, etc. The display device according to the embodiment of the present disclosure may also be a near-eye device that replaces an optical structure with a digital display, such as professional equipment such as an electronic telescope, an electronic microscope, and a medical endoscope that have similar near-eye display requirements.

[0142] The electronic device according to the embodiments of the present disclosure may also be a smart home appliance including a display function. For example, the smart home appliance may be a television, a digital video disc (DVD) player, a stereo, a refrigerator, an air conditioner, a vacuum cleaner, an oven, a microwave oven, a washing machine, a dryer, an air purifier, a set-top box, a television (TV) box, a game console, an electronic dictionary, an electronic key, a video camera, an electronic photo frame, etc.

[0143] The electronic device according to the embodiments of the present disclosure may also be a medical device (for example, a magnetic resonance angiography (MRA) device, a magnetic resonance imaging (MRI) device, a tomography (CT) device, an imaging device, or an ultrasound device), a navigation device, a global positioning system (GPS) receiver, an event data recorder (EDR), a flight data recorder (FDR), an automotive infotainment device, a marine electronic device (for example, a marine navigation device, a gyroscope, or a compass), an avionics device, a security device, an industrial or consumer robot, an automatic teller machine (ATM), a point of sale (POS), etc.

[0144] The electronic device according to the embodiments of the present disclosure may also be furniture with a display function, a part of a building / structure, an electronic bulletin board, an electronic signature receiving device, a projector, a variety of measuring devices (for example: a water meter, an electricity meter, a gas meter, or an electromagnetic wave measuring device), etc. The electronic device according to some embodiments may be any combination of the aforementioned devices. In addition, the electronic device according to various embodiments may be a flexible device. In addition, it should be clear to those skilled in the art that the electronic device according to various embodiments of the present disclosure is not limited to the above-mentioned devices.

[0145] It should be understood that the present disclosure is not limited in its application to the detailed structure and arrangement of the components set forth in this specification. The present disclosure is capable of other embodiments and can be implemented and carried out in a variety of ways. The aforementioned variations and modifications fall within the scope of the present disclosure. It should be understood that the present disclosure disclosed and defined in this specification extends to all alternative combinations of two or more individual features mentioned or evident in the text and / or the drawings. All of these different combinations constitute multiple alternative aspects of the present disclosure. The embodiments described in this specification illustrate the best known ways to implement the present disclosure and will enable those skilled in the art to utilize the present disclosure.

Claims

1. A display panel, characterized in that: include: Driver backplane; A light-emitting device comprising a first electrode, a light-emitting layer, and a second electrode stacked in sequence in a direction away from a driving backplane, wherein the light-emitting device has a central region and an edge region surrounding the central region; A lens layer is arranged on a side of the light-emitting device away from the driving backplane, and the lens layer includes a plurality of lens units. One lens unit and one light-emitting device are arranged to overlap, and the lens unit includes a first lens portion and a second lens portion. The first lens portion and the central area are overlapped, and the first lens portion is used to gather the light emitted from the central area. The second lens portion and the edge area are overlapped, and the second lens portion is used to gather the light emitted from the edge area.

2. The display panel according to claim 1, wherein: The first lens portion and the second lens portion are both convex lenses convex in a direction away from the light emitting device.

3. The display panel according to claim 2, wherein: The curvature radius of the second lens portion is smaller than the curvature radius of the first lens portion; The refractive index of the first lens portion and the refractive index of the second lens portion are the same.

4. The display panel according to claim 3, wherein: The second lens portion is a spherical segment structure, and the arch height of the first lens portion is less than or equal to the curvature radius of the second lens portion.

5. The display panel according to claim 2, wherein: The refractive index of the second lens portion is greater than the refractive index of the first lens portion; The first lens portion has the same curvature radius as the second lens portion.

6. The display panel according to claim 1, wherein: The first lens portion includes a plurality of first lenses, and the plurality of first lenses are stacked and distributed in a direction away from the driving back plate; And / or, the second lens portion includes a plurality of second lenses, and the plurality of second lenses are stacked and distributed in a direction away from the driving back plate.

7. The display panel according to claim 6, wherein: The number of the second lenses corresponding to each light emitting device is greater than the number of the first lenses.

8. The display panel according to claim 1, wherein: The central axis of the first lens portion is perpendicular to the driving back plate, and the central axis of the second lens portion is inclined toward the central axis of the first lens portion and is arranged at an angle.

9. The display panel according to claim 1, wherein: The display panel further includes: a color filter layer, arranged on a side of the light emitting device away from the driving backplane and between the light emitting device and the lens layer; The first packaging layer is arranged on a side of the second electrode away from the driving backplane and between the second electrode and the color filter layer.

10. The display panel according to claim 9, wherein: The color filter layer is provided with a protruding structure in a direction away from the light emitting device, and the protruding structure and the light emitting device are arranged to overlap.

11. The display panel according to claim 10, wherein: The surface of the first encapsulation layer facing the color filter layer has a protrusion, and the orthographic projection of the protrusion on the driving backplane and the orthographic projection of the edge area on the driving backplane at least partially overlap; The surfaces of the color filter layer and the first encapsulation layer that are close to each other are bonded to each other.

12. The display panel according to any one of claims 1 to 11, characterized in that: The driving backplane includes a driving transistor; the display panel further includes a via for electrically connecting the first electrode to a source or a drain of the driving transistor; The orthographic projection of the second lens portion on the driving back plate and the orthographic projection of the via hole on the driving back plate at least partially overlap.

13. The display panel according to any one of claims 1 to 11, characterized in that: The driving backplane includes a driving transistor; the display panel further includes a via for electrically connecting the first electrode to a source or a drain of the driving transistor; The curvature radius of a portion of the second lens portion overlapping the via hole is smaller than the curvature radius of a portion of the second lens portion not overlapping the via hole; And / or, the refractive index of the second lens portion where it overlaps with the via hole is greater than the curvature radius of the second lens portion where it does not overlap with the via hole.

14. The display panel according to any one of claims 1 to 11, characterized in that: The driving backplane includes a driving transistor; the display panel further includes a via for electrically connecting the first electrode to a source or a drain of the driving transistor; The display panel further includes a pixel definition layer, wherein the pixel definition layer has an opening through which the first electrode leaks; There is a first distance between the edge of the central area facing the via hole and the edge of the opening; There is a second distance between an edge of a central region of the first electrode facing away from the via hole and an edge of the opening; The second distance is smaller than the first distance.

15. The display panel according to claim 14, wherein: The portion of the first electrode corresponding to the edge region includes a first edge region covered by the pixel definition layer and a second edge region not covered by the pixel definition layer, wherein the second edge region is arranged around the central region and between the central region and the first edge region; The second lens portion includes a first lens area and a second lens area, the first lens area and the first edge area are overlapped, and the second lens area and the second edge area are overlapped; Wherein, the refractive index of the first lens portion is smaller than the refractive index of the second lens area; and / or the curvature radius of the first lens portion is larger than the curvature radius of the second lens area.

Images