Display panel, preparation method thereof and display device

Abstract

The display panel comprises a driving backboard, a plurality of sub-pixels and a plurality of micro-lens units, the micro-lens units are located on the sides, away from the driving backboard, of the sub-pixels, and the orthographic projection of each micro-lens unit on the driving backboard covers the orthographic projection of an opening where the corresponding sub-pixel is located on the driving backboard. A graph of each micro lens unit on any cross section which is perpendicular to the driving back plate and passes through the center of the orthographic projection of the micro lens unit on the driving back plate is an axial symmetry graph, and an axis is a straight line which passes through the center of the orthographic projection of the micro lens unit on the driving back plate and is perpendicular to the driving back plate; on any cross section of the micro lens unit, which is vertical to the driving back plate and passes through the center of the orthographic projection of the micro lens unit on the driving back plate, the distance between any point on one side, deviating from the driving back plate, of the micro lens unit and the center of the orthographic projection of the micro lens unit on the driving back plate is D; the length of one side, close to the driving backboard, of each micro-lens unit is 2R, and 0.9 < = D / R < = 1.0.

Description

Display panel, manufacturing method thereof, and display device Technical Field

[0001] The embodiments of the present disclosure belong to the field of display technology, and particularly relate to a display panel, a manufacturing method thereof, and a display device. Background Art

[0002] OLED (Organic Light-Emitting Diode) displays have attracted widespread attention due to their advantages such as self-luminescence, low power consumption, lightness, flexibility, brilliant colors, high contrast, and fast response rate.

[0003] Summary of the Invention

[0004] In a first aspect, an embodiment of the present disclosure provides a display panel, comprising a driving backplane, a pixel defining layer, a plurality of sub-pixels, and a plurality of micro-lens units.

[0005] The pixel definition layer is located on one side of the driving backplane, and a plurality of openings are opened in the pixel definition layer.

[0006] The plurality of sub-pixels are respectively located in different openings;

[0007] The plurality of microlens units are located on a side of the plurality of sub-pixels away from the driving backplane, and the plurality of microlens units are distributed in a one-to-one correspondence with the plurality of sub-pixels.

[0008] The orthographic projection of the microlens unit on the driving backplane covers the orthographic projection of the opening where the corresponding sub-pixel is located on the driving backplane,

[0009] The figure of the microlens unit on any cross section perpendicular to the driving backplane and passing through the center of the orthographic projection of the microlens unit on the driving backplane is an axisymmetric figure, and the axis is a straight line passing through the center of the orthographic projection of the microlens unit on the driving backplane and perpendicular to the driving backplane.

[0010] On any cross section of the microlens unit that is perpendicular to the driving backplane and passes through the center of the orthographic projection of the microlens unit on the driving backplane, the distance between any point on the side of the microlens unit that faces away from the driving backplane and the center of the orthographic projection of the microlens unit on the driving backplane is D, and the length of the side of the microlens unit close to the driving backplane is 2R.

[0011] 0.9≤D / R≤1.0.

[0012] In some embodiments, the device further includes a color filter layer located on a side of the plurality of microlens units away from the driving backplane;

[0013] The color filter layer includes a black matrix and a plurality of color resists.

[0014] The black matrix and the plurality of color resists are arranged in the same layer,

[0015] The plurality of color resists are distributed in a one-to-one correspondence with the plurality of sub-pixels;

[0016] The orthographic projection of the color resist on the driving backplane covers the orthographic projection of the opening where the corresponding sub-pixel is located on the driving backplane.

[0017] In some embodiments, the device further includes a color filter layer located on a side of the plurality of sub-pixels away from the driving backplane and on a side of the plurality of micro-lens units close to the driving backplane;

[0018] The color filter layer includes a black matrix and a plurality of color resists.

[0019] The black matrix and the plurality of color resists are arranged in the same layer,

[0020] The plurality of color resists are distributed in a one-to-one correspondence with the plurality of sub-pixels;

[0021] The orthographic projection of the color resist on the driving backplane covers the orthographic projection of the opening where the corresponding sub-pixel is located on the driving backplane.

[0022] In some embodiments, the surface of the microlens unit facing away from the driving back plate is an arc surface.

[0023] A surface of one side of the microlens unit close to the driving back plate is a plane.

[0024] In some embodiments, an angle between a tangent line at an intersection of the arc surface of the microlens unit with the plane and the plane is in a range of 40° to 90°.

[0025] In some embodiments, the distance between the vertex of the arc surface and the center of the plane is H, and the radius of the plane is R'.

[0026] The range of H / R' is 0.4~1.

[0027] In some embodiments, the orthographic projection area of ​​the microlens unit on the driving backplane is not less than the orthographic projection area of ​​the opening where the corresponding sub-pixel is located on the driving backplane.

[0028] The orthographic projection area of ​​the color resist on the driving backplane is not less than the orthographic projection area of ​​the corresponding microlens unit on the driving backplane.

[0029] In some embodiments, the orthographic projection area of ​​the color resist on the driving backplane is not less than the orthographic projection area of ​​the opening where the corresponding sub-pixel is located on the driving backplane.

[0030] The orthographic projection area of ​​the microlens unit on the driving backplane is not less than the orthographic projection area of ​​the corresponding color resist on the driving backplane.

[0031] In some embodiments, the plurality of sub-pixels include a plurality of first sub-pixels, a plurality of second sub-pixels, and a plurality of third sub-pixels.

[0032] The plurality of color resists include a plurality of first color resists, a plurality of second color resists and a plurality of third color resists,

[0033] The colors of the first color resist, the second color resist and the third color resist are different;

[0034] The first sub-pixel corresponds to the first color resistor, and the two have the same color;

[0035] The second sub-pixel corresponds to the second color resistor, and the two have the same color;

[0036] The third sub-pixel corresponds to the third color resistor, and the two have the same color;

[0037] The openings where the first sub-pixel, the second sub-pixel, and the third sub-pixel are located have different opening areas;

[0038] The first color resist, the second color resist, and the third color resist have different thicknesses;

[0039] The plurality of microlens units include a plurality of first microlens units, a plurality of second microlens units and a plurality of third microlens units,

[0040] The first sub-pixel corresponds to the first microlens unit;

[0041] The second sub-pixel corresponds to the second microlens unit;

[0042] The third sub-pixel corresponds to the third microlens unit;

[0043] The first microlens unit, the second microlens unit and the third microlens unit are identical in size and shape.

[0044] In some embodiments, a first planarization layer and an encapsulation layer are further included.

[0045] The encapsulation layer is located on a side of the plurality of sub-pixels away from the driving backplane, and is located on a side of the plurality of microlens units close to the driving backplane.

[0046] The surface of the encapsulation layer on a side facing away from the driving back plate is flush;

[0047] The first flat layer is located on a side of the plurality of microlens units away from the driving backplane, and is located on a side of the color filter layer close to the driving backplane.

[0048] A surface of the first flat layer facing away from the driving back plate is flush.

[0049] In some embodiments, the encapsulation layer has the same refractive index as the microlens unit;

[0050] The refractive index of the microlens unit is greater than the refractive index of the first flat layer;

[0051] The refractive index of the microlens unit is n2, the refractive index of the first flat layer is n3,

[0052] n2-n3>0.09.

[0053] In some embodiments, f = (n3×R1) / (n2−n3);

[0054] f=h×n1;

[0055] Wherein, f is the focal length of the microlens unit; R1 is the radius of the arc surface of the microlens unit when the surface facing away from the driving back plate is an arc surface; h is the thickness of the encapsulation layer; and n1 is the refractive index of the encapsulation layer.

[0056] In some embodiments, it further includes an encapsulation layer and a second planarization layer.

[0057] The encapsulation layer is located on a side of the plurality of sub-pixels away from the driving backplane, and is located on a side of the color filter layer close to the driving backplane.

[0058] The second flat layer is located on a side of the color filter layer away from the driving backplane, and is located on a side of the microlens unit close to the driving backplane.

[0059] The surface of the encapsulation layer on a side facing away from the driving back plate is flush;

[0060] The surface area of ​​the second flat layer that contacts the first microlens unit, the second microlens unit, and the third microlens unit is flush with each other.

[0061] Parts of the second flat layer that contact the first microlens unit, the second microlens unit, and the third microlens unit have different thicknesses.

[0062] In some embodiments, the average thickness of the first color resist, the second color resist, and the third color resist is a first average value.

[0063] The thickness difference of the portion of the second flat layer corresponding to the contact with the first microlens unit, the second microlens unit and the third microlens unit is the difference between the difference between the first color resist and the first average value, the difference between the second color resist and the first average value, and the difference between the third color resist and the first average value.

[0064] In some embodiments, a thickness difference between portions of the second planar layer corresponding to portions in contact with the first microlens unit and the second microlens unit is a thickness difference between the first color resist and the second color resist;

[0065] The thickness difference between the portions of the second planar layer that contact the first microlens unit and the third microlens unit is the thickness difference between the first color resist and the third color resist.

[0066] In some embodiments, it further includes an encapsulation layer and a second planarization layer.

[0067] The encapsulation layer is located on a side of the plurality of sub-pixels away from the driving backplane, and is located on a side of the color filter layer close to the driving backplane.

[0068] The second flat layer is located on a side of the color filter layer away from the driving backplane, and is located on a side of the microlens unit close to the driving backplane.

[0069] The thickness of the portion of the encapsulation layer that contacts the first color resist, the second color resist, and the third color resist is different.

[0070] The surfaces of the first color resistor, the second color resistor, and the third color resistor facing away from the driving backplane are flush with each other.

[0071] A surface of the second flat layer facing away from the driving back plate is flush.

[0072] In some embodiments, the average thickness of the first color resist, the second color resist, and the third color resist is a first average value.

[0073] The thickness difference of the portion of the encapsulation layer corresponding to the contact with the first color resist, the second color resist and the third color resist is the difference between the difference between the first color resist and the first average, the difference between the second color resist and the first average, and the difference between the third color resist and the first average.

[0074] In some embodiments, the thickness difference of the portion of the encapsulation layer corresponding to the portion in contact with the first color resist and the second color resist is the thickness difference between the first color resist and the second color resist;

[0075] The difference in thickness of the portion of the encapsulation layer that contacts the first color resist and the third color resist is the difference in thickness of the first color resist and the third color resist.

[0076] In some embodiments, the invention further includes an encapsulation layer, a second planarization layer, and a third planarization layer.

[0077] The encapsulation layer is located on a side of the plurality of sub-pixels away from the driving backplane, and is located on a side of the color filter layer close to the driving backplane.

[0078] The second flat layer is located on a side of the color filter layer away from the driving backplane, and is located on a side of the microlens unit close to the driving backplane.

[0079] The third planar layer is located on a side of the plurality of sub-pixels close to the driving backplane, and is located on a side of the driving backplane close to the plurality of sub-pixels.

[0080] The first sub-pixel includes a first anode, a first light-emitting functional layer, and a first cathode, wherein the first anode, the first light-emitting functional layer, and the first cathode are stacked in sequence away from the third planar layer;

[0081] The second sub-pixel includes a second anode, a second light-emitting functional layer, and a second cathode, wherein the second anode, the second light-emitting functional layer, and the second cathode are stacked in sequence away from the third planar layer;

[0082] The third sub-pixel includes a third anode, a third light-emitting functional layer and a third cathode, wherein the third anode, the third light-emitting functional layer and the third cathode are stacked in sequence away from the third planar layer;

[0083] The thicknesses of the portions of the third flat layer corresponding to the first anode, the second anode and the third anode are different.

[0084] The thickness of the portion of the encapsulation layer that contacts the first color resist, the second color resist, and the third color resist is the same.

[0085] The surfaces of the first color resistor, the second color resistor, and the third color resistor facing away from the driving backplane are flush with each other.

[0086] A surface of the second flat layer facing away from the driving back plate is flush.

[0087] In some embodiments, the average thickness of the first color resist, the second color resist, and the third color resist is a first average value.

[0088] The thickness difference of the portions of the third flat layer corresponding to the contacts with the first anode, the second anode and the third anode is the difference between the difference between the first color resist and the first average, the difference between the second color resist and the first average and the difference between the third color resist and the first average.

[0089] In some embodiments, the thickness difference of the portion of the third planar layer corresponding to the portion in contact with the first anode and the second anode is the thickness difference between the first color resist and the second color resist;

[0090] The difference in thickness of the portion of the third planar layer corresponding to the portion in contact with the first anode and the third anode is the difference in thickness between the first color resist and the third color resist.

[0091] In some embodiments, the device further includes a protective layer located on a side of the microlens unit facing away from the driving backplane;

[0092] The second flat layer has the same refractive index as the microlens unit;

[0093] The refractive index of the microlens unit is greater than the refractive index of the protective layer;

[0094] The refractive index of the microlens unit is n2, the refractive index of the protective layer is n4,

[0095] n2-n4>0.09.

[0096] In some embodiments, f = (n4×R1) / (n2-n4);

[0097] f=h1×n5+h2×n6+h3×n7;

[0098] Among them, f is the focal length of the microlens unit; R1 is the radius of the arc surface when the surface of the microlens unit facing away from the driving backplane is a circular arc surface; h1 is the thickness of the second flat layer; n5 is the refractive index of the second flat layer; h2 is the thickness of the color resist corresponding to the microlens unit; n6 is the refractive index of the color resist corresponding to the microlens unit; h3 is the thickness of the encapsulation layer portion corresponding to the microlens unit; n7 is the refractive index of the encapsulation layer portion corresponding to the microlens unit.

[0099] In some embodiments, the microlens unit includes a microlens, and the duty cycle of the microlens in the orthographic projection area of ​​the opening where the sub-pixel is located on the driving backplane is 100%;

[0100] Alternatively, the microlens unit includes a plurality of microlenses, and a duty ratio of the microlenses in an orthographic projection area of ​​the opening where the sub-pixel is located on the driving backplane is greater than 70%.

[0101] In some embodiments, the plurality of sub-pixels are arranged in an array.

[0102] The plurality of micro lens units are arranged in an array.

[0103] In a second aspect, an embodiment of the present disclosure provides a method for manufacturing a display panel, which includes: preparing a driving backplane;

[0104] preparing a pixel definition layer and a plurality of openings therein on one side of the driving backplane;

[0105] preparing a plurality of sub-pixels; wherein the plurality of sub-pixels are respectively located in different openings;

[0106] preparing a plurality of microlens units on a side of the plurality of sub-pixels away from the driving backplane;

[0107] The plurality of microlens units are distributed in a one-to-one correspondence with the plurality of sub-pixels,

[0108] The orthographic projection of the microlens unit on the driving backplane covers the orthographic projection of the opening where the corresponding sub-pixel is located on the driving backplane,

[0109] The figure of the microlens unit on any cross section perpendicular to the driving backplane and passing through the center of the orthographic projection of the microlens unit on the driving backplane is an axisymmetric figure, and the axis is a straight line passing through the center of the orthographic projection of the microlens unit on the driving backplane and perpendicular to the driving backplane.

[0110] On any cross section of the microlens unit that is perpendicular to the driving backplane and passes through the center of the orthographic projection of the microlens unit on the driving backplane, the distance between any point on the side of the microlens unit that faces away from the driving backplane and the center of the orthographic projection of the microlens unit on the driving backplane is D, and the length of the side of the microlens unit close to the driving backplane is 2R.

[0111] 0.9≤D / R≤1.0.

[0112] In a third aspect, an embodiment of the present disclosure further provides a display device, which includes the above-mentioned display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0113] The accompanying drawings are used to provide a further understanding of the embodiments of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure and do not constitute a limitation of the present disclosure. The above and other features and advantages will become more apparent to those skilled in the art by describing the detailed exemplary embodiments with reference to the accompanying drawings, in which:

[0114] FIG1a is a schematic diagram of light emission of an OLED device in the disclosed technology.

[0115] FIG1 b is a schematic diagram of light emission of an OLED device using a microlens structure in the disclosed technology.

[0116] FIG1c is a schematic cross-sectional view of the structure of a silicon-based OLED display panel in the disclosed technology.

[0117] FIG. 2 a is a schematic top view of the structure of the display panel in an embodiment of the present disclosure.

[0118] FIG2 b is a schematic cross-sectional view of the structure along the AA section line in FIG2 a .

[0119] FIG2 c is a schematic diagram of an arbitrary cross section of the microlens unit that is perpendicular to the driving backplane and passes through the center of the orthographic projection of the microlens unit on the driving backplane in an embodiment of the present disclosure.

[0120] FIG2 d is a schematic cross-sectional view of another structure along the AA section line in FIG2 a .

[0121] FIG. 2e is a schematic cross-sectional view of another structure along the AA section line in FIG. 2a .

[0122] FIG2 f is a schematic cross-sectional view of another structure along the AA section line in FIG2 a .

[0123] FIG2g is another schematic diagram of an arbitrary cross section of the microlens unit that is perpendicular to the driving backplane and passes through the center of the orthographic projection of the microlens unit on the driving backplane in an embodiment of the present disclosure.

[0124] FIG2h is a schematic top view of the stacked structure of the color resist, the microlens unit, and the sub-pixel in an embodiment of the present disclosure.

[0125] FIG2i is another schematic top view of the stacked structure of the microlens unit, the color resist, and the sub-pixel in an embodiment of the present disclosure.

[0126] FIG3 is a schematic top view of a microlens unit corresponding to a sub-pixel in an embodiment of the present disclosure.

[0127] FIG4 a is a top view schematically showing a distribution of microlens units in an embodiment of the present disclosure.

[0128] FIG4 b is a top view schematically showing another distribution of microlens units in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0129] To enable those skilled in the art to better understand the technical solutions of the embodiments of the present disclosure, a display panel, a manufacturing method thereof, and a display device provided by the embodiments of the present disclosure are further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0130] The embodiments of the present disclosure will be described more fully below with reference to the accompanying drawings, but the illustrated embodiments may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully enable those skilled in the art to understand the scope of this disclosure.

[0131] The embodiments of the present disclosure are not limited to the embodiments shown in the drawings, but include modifications of the configurations formed based on the manufacturing process. Therefore, the regions illustrated in the drawings are schematic in nature, and the shapes of the regions shown in the drawings illustrate specific shapes of the regions, but are not intended to be limiting.

[0132] In the disclosed technology, refer to Figure 1a, which is a schematic diagram of the light output of the OLED device in the disclosed technology; due to material limitations and the influence of the light output mode, the light output efficiency of the OLED device is relatively low, mainly due to internal and external waveguide effects and total reflection. Currently, the main way to improve light output is to reduce the non-luminous mode and waveguide effect and reduce total reflection.

[0133] Referring to Figure 1b, a schematic diagram of light emission from an OLED device using a microlens structure in the disclosed technology is shown. The microlens structure utilizes a non-flat surface pattern on the side of the microlens facing away from the OLED device to suppress total internal reflection at the interface, while also increasing the light emission surface of the OLED device and focusing edge light. This allows for more light extraction, but it can lead to light leakage from the edges of the pixels of the OLED display panel (i.e., the OLED device) and large viewing angle aberration. Improving or avoiding these issues while increasing pixel light extraction efficiency has become a pressing issue.

[0134] Referring to Figure 1c, there is shown a schematic cross-sectional view of the structure of a silicon-based OLED display panel in the disclosed technology. The silicon-based OLED display panel includes a substrate 11 with a drive circuit distributed therein, a pixel defining layer 2, a plurality of sub-pixels 3, an encapsulation layer 7, a color filter layer 5, a planarization layer 12, and a microlens layer 13. The pixel defining layer 2 is disposed on one side of the substrate 11 and has a plurality of openings therein, with the plurality of sub-pixels 3 located in different openings. The encapsulation layer 7, the color filter layer 5, the planarization layer 12, and the microlens layer 13 are sequentially stacked on the side of the plurality of sub-pixels 3 facing away from the substrate 11. The color filter layer 5 includes a first color resist 511, a second color resist 512, a third color resist 513, and a black matrix 50. The first color resist 511, the second color resist 512, and the third color resist 513 have different colors. The black matrix 50 is located between adjacent color resists and is disposed corresponding to the pixel defining layer 2. Each sub-pixel 3 corresponds to a respective color resist. The microlens layer 13 includes a first microlens unit 41 , a second microlens unit 42 and a third microlens unit 43 , and each microlens unit corresponds to each sub-pixel 3 .

[0135] As can be seen from FIG1c , the thickness of the second color resist 512 is significantly greater than that of the first color resist 511 and the third color resist 513 , which makes the surface of the flat layer 12 on the side of the color filter layer 5 facing away from the substrate 11 uneven, that is, there is a step difference between the surface area of ​​the flat layer 12 in contact with the second microlens unit 42 and the surface area of ​​the flat layer 12 in contact with the first microlens unit 41 and the third microlens unit 43 . The flat layer 12 has a certain drying shrinkage ratio during the preparation process. If the step difference between different areas of the surface of the flat layer 12 on the side facing away from the substrate 11 is large, after the flat layer 12 is prepared, the step difference between different areas of the surface on the side facing away from the substrate 11 is generally not completely eliminated, which may result in the preparation of the flat layer 12 on the back of the flat layer 12. The second microlens unit 42 on the side away from the substrate 11 has an incomplete shape. For example, the first microlens unit 41 and the third microlens unit 43 are both hemispherical in shape with a complete radius to height ratio of 1, while the second microlens unit 42 is formed in an incomplete hemispherical shape. The actual shape of the second microlens unit 42 is that its height H' is less than its radius r, that is, the ratio of the radius r to the height H' of the second microlens unit 42 is not equal to 1. As a result, the sub-pixel 3 corresponding to the second microlens unit 42 has edge light leakage problems, and the silicon-based OLED display panel has large viewing angle aberration (that is, color aberration caused by mixing different colors of light at a wide viewing angle due to sub-pixel edge light leakage) and optical light leakage problems, which seriously affect the display effect of the silicon-based OLED display panel.

[0136] In order to solve the problems of large viewing angle aberration and optical light leakage of silicon-based OLED display panels caused by incomplete morphology of microlens units in the disclosed technology, on the first hand, the present embodiment provides a display panel, referring to Figure 2a, which is a schematic top view of the structure of the display panel in the disclosed embodiment; Figure 2b is a schematic cross-sectional view of the structure along the AA cutting line in Figure 2a; Figure 2c is a schematic diagram of an arbitrary cross-section of the microlens unit in the disclosed embodiment that is perpendicular to the driving backplane and passes through the center of the positive projection of the microlens unit on the driving backplane; wherein, the display panel includes a driving backplane 1, a pixel defining layer 2, a plurality of sub-pixels 3 and a plurality of microlens units 4, the pixel defining layer 2 is located on one side of the driving backplane 1, and a plurality of openings are opened in the pixel defining layer 2, and the plurality of sub-pixels 3 are respectively located in different openings; the plurality of microlens units 4 are located on the side of the plurality of sub-pixels 3 that are away from the driving backplane 1, and The plurality of microlens units 4 are distributed in a one-to-one correspondence with the plurality of sub-pixels 3, the orthographic projection of the microlens unit 4 on the driving backplane 1 covers the orthographic projection of the opening of the corresponding sub-pixel 3 on the driving backplane 1, the figure of the microlens unit 4 on any cross section perpendicular to the driving backplane 1 and passing through the center O of the orthographic projection of the microlens unit 4 on the driving backplane 1 is an axially symmetrical figure, the axis L is a straight line passing through the center O of the orthographic projection of the microlens unit 4 on the driving backplane 1 and perpendicular to the driving backplane 1, on any cross section of the microlens unit 4 perpendicular to the driving backplane 1 and passing through the center O of the orthographic projection of the microlens unit 4 on the driving backplane 1, the distance between any point P on the side of the microlens unit 4 facing away from the driving backplane 1 and the center O of the orthographic projection of the microlens unit 4 on the driving backplane 1 is D, the length of the side of the microlens unit 4 close to the driving backplane 1 is 2R, and 0.9≤D / R≤1.0.

[0137] In some embodiments, the sub-pixel 3 is an OLED (Organic Light-Emitting Diode) device. The sub-pixel 3 includes a reflective anode 31, a light-emitting functional layer 32, and a cathode 33. The reflective anode 31, the light-emitting functional layer 32, and the cathode 33 are stacked in sequence away from the driving backplane 1. When current is generated between the reflective anode 31 and the cathode 33, the light-emitting functional layer 32 emits light. The light-emitting functional layer 32 may include: a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, and an electron injection layer stacked in sequence. In this embodiment, the side of the sub-pixel 3 away from the driving backplane 1 is its light-emitting side, and the microlens unit 4 is arranged on the light-emitting side of the sub-pixel 3.

[0138] In some embodiments, a plurality of pixel circuits (not shown in the figure) are provided in the driving backplane 1 , and the pixel circuits are electrically connected to the reflective anode 31 of the sub-pixel 3 to realize light-emitting driving of the sub-pixel 3 .

[0139] In some embodiments, referring to Figure 2c, the side of any cross-section of the microlens unit 4 that is perpendicular to the driving backplane 1 and passes through the center O of the positive projection of the microlens unit 4 on the driving backplane 1 and that is perpendicular to the driving backplane 1 and passes through the center O of the positive projection of the microlens unit 4 on the driving backplane 1 and that is away from the driving backplane 1 can be a circular arc S1, an elliptical arc S2, or a wavy arc S3.

[0140] In this embodiment, a microlens unit 4 is provided on the side of the sub-pixel 3 facing away from the driving backplane 1 (i.e., the light-emitting side), and the surface of the microlens unit 4 on the side facing away from the driving backplane 1 (i.e., the light-emitting surface) is a non-flat surface, which can suppress the total interfacial reflection of the light emitted by the sub-pixel 3. At the same time, the light-emitting surface of the sub-pixel 3 is enlarged, and the edge light on the light-emitting surface of the sub-pixel 3 is cohesive, so that more light can be extracted, thereby improving the light extraction rate of the sub-pixel 3. By making the figure of the microlens unit 4 on any cross-section perpendicular to the driving backplane 1 and passing through the center O of the orthographic projection of the microlens unit 4 on the driving backplane 1 an axially symmetrical figure, the axis L is a straight line passing through the center O of the orthographic projection of the microlens unit 4 on the driving backplane 1 and perpendicular to the driving backplane 1, On any cross section of the microlens unit 4 that is perpendicular to the driving backplane 1 and passes through the center O of the orthographic projection of the microlens unit 4 on the driving backplane 1, the distance between any point P on the side of the microlens unit 4 that faces away from the driving backplane 1 and the center O of the orthographic projection of the microlens unit 4 on the driving backplane 1 is D, and the length of the side of the microlens unit 4 close to the driving backplane 1 is 2R, and 0.9≤D / R≤1.0. This can ensure the integrity of the morphology of the microlens unit 4 in the display panel, thereby improving or avoiding edge light leakage of the sub-pixel 3, and further improving or avoiding large viewing angle aberration and optical light leakage of the display panel, thereby improving or avoiding the display effect of the display panel.

[0141] In some embodiments, referring to Figure 2b, the display panel further includes a color filter layer 5, which is located on the side of the multiple microlens units 4 away from the driving backplane 1; the color filter layer 5 includes a black matrix 50 and multiple color resists 51, and the black matrix 50 and the multiple color resists 51 are arranged in the same layer, and the multiple color resists 51 are distributed in a one-to-one correspondence with the multiple sub-pixels 3; the orthographic projection of the color resist 51 on the driving backplane 1 covers the orthographic projection of the opening where the corresponding sub-pixel 3 is located on the driving backplane 1.

[0142] In some embodiments, referring to Figure 2d, another structural cross-sectional schematic diagram along the AA cutting line in Figure 2a is shown; Figure 2e is another structural cross-sectional schematic diagram along the AA cutting line in Figure 2a; Figure 2f is another structural cross-sectional schematic diagram along the AA cutting line in Figure 2a; wherein, the display panel also includes a color filter layer 5, which is located on the side of the multiple sub-pixels 3 away from the driving backplane 1 and is located on the side of the multiple microlens units 4 close to the driving backplane 1; the color filter layer 5 includes a black matrix 50 and a plurality of color resists 51, the black matrix 50 and the multiple color resists 51 are arranged in the same layer, and the multiple color resists 51 are distributed one-to-one with the multiple sub-pixels 3; the orthographic projection of the color resist 51 on the driving backplane 1 covers the orthographic projection of the opening where the corresponding sub-pixel 3 is located on the driving backplane 1.

[0143] In some embodiments, referring to Figures 2b, 2d, 2e, 2f, and 2g, Figure 2g is another schematic diagram of an arbitrary cross-section of the microlens unit in the disclosed embodiment, perpendicular to the driving backplane and passing through the center of the orthographic projection of the microlens unit on the driving backplane; wherein the surface of the microlens unit 4 facing away from the driving backplane 1 is an arc surface, and the surface of the microlens unit 4 close to the driving backplane 1 is a plane. That is, the morphology of the microlens unit 4 is a portion of a sphere. The microlens unit 4 with this morphology can better suppress the total interfacial reflection of the light emitted by the sub-pixel 3, while increasing the light emitting surface of the sub-pixel 3 and causing the edge light on the light emitting surface of the sub-pixel 3 to converge, thereby extracting more light, thereby better improving the light output rate of the sub-pixel 3.

[0144] In some embodiments, referring to FIG2g, the angle θ between the tangent line at the intersection point P' of the arc surface of the microlens unit 4 and the plane and the plane ranges from 40° to 90°. The larger the angle θ, the better the light extraction effect of the microlens unit 4, which is beneficial to improving the amount of light emitted in the forward direction (i.e., the direction perpendicular to the light emitting surface of the sub-pixel 3) of the light emitting surface of the sub-pixel 3, thereby helping to improve the light extraction efficiency of the sub-pixel 3. In some embodiments, when the angle θ between the tangent line at the intersection point P' of the arc surface of the microlens unit 4 and the plane and the plane is 90°, the shape of the microlens unit 4 is hemispherical. The microlens unit 4 with this shape can further improve the amount of light emitted in the forward direction of the light emitting surface of the sub-pixel 3, thereby further improving the light extraction efficiency of the sub-pixel 3.

[0145] In some embodiments, referring to FIG. 2g , the distance between the vertex P″ of the arc surface and the center O of the plane is H, the radius of the plane is R′, and the range of H / R′ is 0.4 to 1. The closer the value of H / R′ is to 1, the more conducive it is to increasing the amount of light emitted in the forward direction (i.e., perpendicular to the light emitting surface of the sub-pixel 3) from the light emitting surface of the sub-pixel 3, thereby further improving the light extraction efficiency of the sub-pixel 3.

[0146] In some embodiments, referring to Figures 2b and 2h, Figure 2h is a top view schematic diagram of the stacked structure of color resist, microlens unit and sub-pixel in the embodiment of the present disclosure; the orthographic projection area of ​​the microlens unit 4 on the driving backplane 1 is not less than the orthographic projection area of ​​the opening where its corresponding sub-pixel 3 is located on the driving backplane 1, and the orthographic projection area of ​​the color resist 51 on the driving backplane 1 is not less than the orthographic projection area of ​​its corresponding microlens unit 4 on the driving backplane 1.

[0147] In some embodiments, referring to Figures 2b and 2h, by arranging the microlens unit 4 on the side of the color filter layer 5 close to the sub-pixel 3, that is, the microlens unit 4 is located between the color filter layer 5 and the sub-pixel 3, compared with the solution in the public technology of arranging the color filter layer 5 between the driving backplane 1 and the microlens unit 4, the incomplete morphology of the microlens unit 4 caused by the thickness difference of the color resist 51 of different colors in the color filter layer 5 can be improved or avoided. By first converging the light emitted by the sub-pixel 3 through the microlens unit 4 and then filtering it through the color filter layer 5, the overlap between the color resist 51 in the color filter layer 5 and the black matrix 50 can be reduced, the effective opening of the color resist 51 in the color filter layer 5 can be increased, and the effective opening of the sub-pixel 3 can be increased, thereby increasing the service life of the display panel, improving the display performance of the display panel and enhancing the user experience.

[0148] In some embodiments, referring to Figures 2d, 2e, 2f, and 2i, Figure 2i is another schematic top view of the stacked structure of the microlens unit, color resist, and sub-pixel in the embodiment of the present disclosure; wherein, the orthographic projection area of ​​the color resist 51 on the driving backplane 1 is not less than the orthographic projection area of ​​the opening where its corresponding sub-pixel 3 is located on the driving backplane 1, and the orthographic projection area of ​​the microlens unit 4 on the driving backplane 1 is not less than the orthographic projection area of ​​the corresponding color resist 51 on the driving backplane 1. This can also improve or avoid light leakage at the edges of the sub-pixel 3, thereby improving or avoiding large viewing angle aberration and optical light leakage of the display panel, and improving the display effect of the display panel.

[0149] In some embodiments, referring to FIG. 2 b , FIG. 2 d , FIG. 2 e , and FIG. 2 f , the plurality of sub-pixels 3 include a plurality of first sub-pixels 301 , a plurality of second sub-pixels 302 , and a plurality of third sub-pixels 303 . The first sub-pixels 301 , the second sub-pixels 302 , and the third sub-pixels 303 emit light of different colors. The plurality of color resists 51 include a plurality of first color resists 511 , a plurality of second color resists 512 , and a plurality of third color resists 513 . The first color resists 511 , the second color resists 512 , and the third color resists 513 have different colors. The first sub-pixel 301 corresponds to the first color resist 511 , and the two have the same color. The second sub-pixel 302 corresponds to the second color resist 512, and the two have the same color; the third sub-pixel 303 corresponds to the third color resist 513, and the two have the same color; the openings where the first sub-pixel 301, the second sub-pixel 302, and the third sub-pixel 303 are located are different in opening area; the thicknesses of the first color resist 511, the second color resist 512, and the third color resist 513 are different; the multiple microlens units 4 include multiple first microlens units 41, multiple second microlens units 42, and multiple third microlens units 43, the first sub-pixel 301 corresponds to the first microlens unit 41; the second sub-pixel 302 corresponds to the second microlens unit 42; the third sub-pixel 303 corresponds to the third microlens unit 43; the first microlens unit 41, the second microlens unit 42, and the third microlens unit 43 are the same in size and shape.

[0150] In some embodiments, the first sub-pixel 301 , the second sub-pixel 302 , and the third sub-pixel 303 emit the same light-emitting color.

[0151] In some embodiments, the thickness of the first sub-pixel 301, the second sub-pixel 302, and the third sub-pixel 303 are the same. The thickness of the first sub-pixel 301, the second sub-pixel 302, and the third sub-pixel 303 refers to the total thickness of the reflective anode 31, the light-emitting functional layer 32, and the cathode 33 of each sub-pixel 3.

[0152] In some embodiments, referring to FIG. 2 b , the display panel further includes a first planar layer 6 and an encapsulation layer 7. The encapsulation layer 7 is located on the side of the plurality of sub-pixels 3 facing away from the driving backplane 1 and on the side of the plurality of micro-lens units 4 close to the driving backplane 1. The surface of the encapsulation layer 7 on the side facing away from the driving backplane 1 is flush. The first planar layer 6 is located on the side of the plurality of micro-lens units 4 facing away from the driving backplane 1 and on the side of the color filter layer 5 close to the driving backplane 1. The surface of the first planar layer 6 on the side facing away from the driving backplane 1 is flush. The flush surface of the encapsulation layer 7 on the side facing away from the driving backplane 1 ensures the integrity of the morphology of the micro-lens units 4 formed on the side of the encapsulation layer 7 facing away from the driving backplane 1, thereby improving or avoiding light leakage at the edges of the sub-pixels 3, thereby improving or avoiding large viewing angle aberration and optical light leakage of the display panel, and improving the display quality of the display panel.

[0153] In some embodiments, referring to FIG. 2 b , the display panel further includes a protective layer 10 located on a side of the color filter layer 5 facing away from the driving backplane 1 , for protecting the color filter layer 5 .

[0154] In some embodiments, referring to FIG2b , the encapsulation layer 7 and the microlens unit 4 have the same refractive index. Since the greater the difference in refractive index between the encapsulation layer 7 and the microlens unit 4, the less light output of the corresponding sub-pixel 3, such a configuration can increase the light output of the sub-pixel 3, thereby increasing the light output rate of the sub-pixel 3. The refractive index of the microlens unit 4 is greater than the refractive index of the first flat layer 6. The refractive index of the microlens unit 4 is n2, and the refractive index of the first flat layer 6 is n3, and n2-n3>0.09.

[0155] In some embodiments, n2-n3>0.14. In some embodiments, n2-n3>0.3. The greater the difference between the refractive index of the microlens unit 4 and the refractive index of the first planar layer 6, the greater the cohesive effect of the microlens unit 4 on the light emitted by the sub-pixel 3, thereby further increasing the light emitting surface of the sub-pixel 3 and further increasing the light output of the sub-pixel 3.

[0156] In some embodiments, referring to FIG. 2b , f = (n3 × R1) / (n2 - n3); f = h × n1; where f is the focal length of the microlens unit 4; R1 is the radius of the arc surface of the microlens unit 4 facing away from the driver backplane 1; h is the thickness of the encapsulation layer 7; and n1 is the refractive index of the encapsulation layer 7. This arrangement places the focal point of the microlens unit 4 on the light-emitting surface of the sub-pixel 3, thereby further increasing the amount of light emitted by the sub-pixel 3.

[0157] In some embodiments, the encapsulation layer 7 includes two inorganic layers and one organic layer, and the focal length of the microlens unit 4 is equal to the thickness of each inorganic layer×the refractive index of each inorganic layer+the thickness of the organic layer×the refractive index of the organic layer.

[0158] In some embodiments, referring to Figure 2d, the display panel further includes an encapsulation layer 7 and a second flat layer 8. The encapsulation layer 7 is located on the side of the multiple sub-pixels 3 facing away from the driving backplane 1, and on the side of the color filter layer 5 close to the driving backplane 1. The second flat layer 8 is located on the side of the color filter layer 5 facing away from the driving backplane 1, and on the side of the microlens unit 4 close to the driving backplane 1. The surface of the encapsulation layer 7 facing away from the driving backplane is flush; the surface area of ​​the second flat layer 8 that is in contact with the first microlens unit 41, the second microlens unit 42, and the third microlens unit 43 is flush, and the thickness of the corresponding parts of the second flat layer 8 that are in contact with the first microlens unit 41, the second microlens unit 42, and the third microlens unit 43 are different.

[0159] In this embodiment, referring to FIG. 2 d , a groove or protrusion may be provided on the surface of the second planar layer 8 on the side in contact with any one of the first microlens unit 41, the second microlens unit 42, and the third microlens unit 43. This allows the thickness of the portions of the second planar layer 8 corresponding to the portions in contact with the first microlens unit 41, the second microlens unit 42, and the third microlens unit 43 to be different, thereby compensating for the thickness differences between the first color resist 511, the second color resist 512, and the third color resist 513. This ensures that the surface areas of the second planar layer 8 in contact with the first microlens unit 41, the second microlens unit 42, and the third microlens unit 43 are aligned, thereby ensuring a complete appearance of the first microlens unit 41, the second microlens unit 42, and the third microlens unit 43 formed on the side of the second planar layer 8 facing away from the color filter layer 5. This improves or prevents light leakage from the edges of the sub-pixels 3, improves or prevents large viewing angle aberration and optical light leakage of the display panel, and enhances the display quality of the display panel.

[0160] In some embodiments, referring to FIG. 2 d , the average thickness of the first color resist 511 , the second color resist 512 , and the third color resist 513 is a first average value, and the thickness difference of the portion of the second flat layer 8 corresponding to the contact with the first microlens unit 41 , the second microlens unit 42 , and the third microlens unit 43 is the difference between the difference between the first color resist 511 and the first average value, the difference between the second color resist 512 and the first average value, and the difference between the third color resist 513 and the first average value.

[0161] 2 d , a groove or protrusion may be provided on the surface of the second flat layer 8 on the side in contact with any one of the first microlens unit 41, the second microlens unit 42, and the third microlens unit 43, so that the thicknesses of the portions of the second flat layer 8 corresponding to the portions in contact with the first microlens unit 41, the second microlens unit 42, and the third microlens unit 43 are different. This compensates for the difference between the first color resist 511 and the first mean, the difference between the second color resist 512 and the first mean, and the difference between the third color resist 513 and the first mean, thereby achieving the leveling of the surface areas of the second flat layer 8 in contact with the first microlens unit 41, the second microlens unit 42, and the third microlens unit 43, thereby ensuring the complete morphology of the first microlens unit 41, the second microlens unit 42, and the third microlens unit 43 formed on the side of the second flat layer 8 facing away from the color filter layer 5.

[0162] In some embodiments, referring to Figure 2d, the thickness difference of the portion of the second flat layer 8 corresponding to the contact with the first microlens unit 41 and the second microlens unit 42 is the thickness difference between the first color resist 511 and the second color resist 512; the thickness difference of the portion of the second flat layer 8 corresponding to the contact with the first microlens unit 41 and the third microlens unit 43 is the thickness difference between the first color resist 511 and the third color resist 513.

[0163] A groove or protrusion may be provided on the surface of the second flat layer 8 on the side in contact with the second microlens unit 42 and the third microlens unit 43, so that the surface of the second flat layer 8 corresponding to the contact portions with the second microlens unit 42 and the third microlens unit 43 are flush with the surface of the second flat layer 8 corresponding to the contact portions with the first microlens unit 41, thereby compensating for the thickness difference between the second color resist 512 and the third color resist 513 and the first color resist 511. This ensures that the surface areas of the second flat layer 8 in contact with the first microlens unit 41, the second microlens unit 42, and the third microlens unit 43 are flush, thereby ensuring that the morphologies of the first microlens unit 41, the second microlens unit 42, and the third microlens unit 43 formed on the side of the second flat layer 8 facing away from the color filter layer 5 are complete.

[0164] In some embodiments, referring to Figure 2e, the display panel further includes an encapsulation layer 7 and a second flat layer 8. The encapsulation layer 7 is located on the side of the multiple sub-pixels 3 facing away from the driving backplane 1, and on the side of the color filter layer 5 close to the driving backplane 1; the second flat layer 8 is located on the side of the color filter layer 5 facing away from the driving backplane 1, and on the side of the microlens unit 4 close to the driving backplane 1. The thicknesses of the corresponding portions of the encapsulation layer 7 that are in contact with the first color resist 511, the second color resist 512, and the third color resist 513 are different. The surfaces of the first color resist 511, the second color resist 512, and the third color resist 513 on the side facing away from the driving backplane 1 are flush, and the surface of the second flat layer 8 on the side facing away from the driving backplane 1 is flush.

[0165] In this embodiment, referring to FIG. 2 e , a groove or protrusion may be provided on the surface of the encapsulation layer 7 on a side in contact with any one of the first color resist 511 , the second color resist 512 , and the third color resist 513 , so that the thickness of the portion of the encapsulation layer 7 corresponding to the contact with the first color resist 511 , the second color resist 512 , and the third color resist 513 is different, thereby compensating for the thickness difference between the first color resist 511 , the second color resist 512 , and the third color resist 513 . This ensures that the surfaces of the first color resist 511 , the second color resist 512 , and the third color resist 513 facing away from the driving backplane 1 are flush, and the surface of the second planarizing layer 8 facing away from the driving backplane 1 is flush. This further ensures that the morphology of the first microlens unit 41 , the second microlens unit 42 , and the third microlens unit 43 formed on the side of the second planarizing layer 8 facing away from the color filter layer 5 is complete, thereby improving or avoiding light leakage at the edge of the sub-pixel 3 , improving or avoiding large viewing angle aberration and optical light leakage of the display panel, and improving or avoiding the display effect of the display panel.

[0166] In some embodiments, referring to Figure 2e, the average thickness of the first color resist 511, the second color resist 512 and the third color resist 513 is a first average value, and the thickness difference of the corresponding portions of the encapsulation layer 7 that are in contact with the first color resist 511, the second color resist 512 and the third color resist 513 is the difference between the first color resist 511 and the first average value, the difference between the second color resist 512 and the first average value, and the difference between the third color resist 513 and the first average value.

[0167] 2e , a groove or protrusion may be provided on the surface of the encapsulation layer 7 on the side in contact with any one of the first color resist 511, the second color resist 512, and the third color resist 513, so that the thicknesses of the portions of the encapsulation layer 7 corresponding to the portions in contact with the first color resist 511, the second color resist 512, and the third color resist 513 are different, thereby compensating for the difference between the first color resist 511 and the first mean, the difference between the second color resist 512 and the first mean, and the difference between the third color resist 513 and the first mean. This ensures that the surfaces of the first color resist 511, the second color resist 512, and the third color resist 513 facing away from the driver backplane 1 are flush, and the surface of the second planarizing layer 8 facing away from the driver backplane 1 is flush, thereby ensuring that the morphologies of the first microlens units 41, the second microlens units 42, and the third microlens units 43 formed on the side of the second planarizing layer 8 facing away from the color filter layer 5 are complete.

[0168] In some embodiments, referring to Figure 2e, the thickness difference of the portion of the encapsulation layer 7 corresponding to the contact with the first color resist 511 and the second color resist 512 is the thickness difference between the first color resist 511 and the second color resist 512; the thickness difference of the portion of the encapsulation layer 7 corresponding to the contact with the first color resist 511 and the third color resist 513 is the thickness difference between the first color resist 511 and the third color resist 513.

[0169] In particular, a groove or a protrusion can be provided on the surface of the encapsulation layer 7 on the side in contact with the second color resist 512 and the third color resist 513, so that the surfaces of the second color resist 512 and the third color resist 513 on the side facing away from the driving backplate 1 are respectively flush with the surface of the first color resist 511 on the side facing away from the driving backplate 1, so as to compensate for the thickness difference between the second color resist 512 and the third color resist 513 and the first color resist 511, thereby achieving the flushness of the surfaces of the first color resist 511, the second color resist 512, and the third color resist 513 on the side facing away from the driving backplate 1, and the flushness of the surface of the second flat layer 8 on the side facing away from the driving backplate 1, thereby ensuring the complete morphology of the first microlens unit 41, the second microlens unit 42, and the third microlens unit 43 formed on the side of the second flat layer 8 facing away from the color filter layer 5.

[0170] In some embodiments, referring to FIG2f, the display panel further includes an encapsulation layer 7, a second flat layer 8, and a third flat layer 9. The encapsulation layer 7 is located on the side of the multiple sub-pixels 3 away from the driving backplane 1, and on the side of the color filter layer 5 close to the driving backplane 1. The second flat layer 8 is located on the side of the color filter layer 5 away from the driving backplane 1, and on the side of the microlens unit 4 close to the driving backplane 1. The third flat layer 9 is located on the side of the multiple sub-pixels 3 close to the driving backplane 1, and on the side of the driving backplane 1 close to the multiple sub-pixels 3. The first sub-pixel 301 includes a first anode 3011, a first light-emitting functional layer 3012, and a first cathode 3013. The first anode 3011, the first light-emitting functional layer 3012, and the first cathode 3013 are stacked in sequence away from the third flat layer 9. The second sub-pixel 302 includes a second anode 3021, a second light-emitting functional layer 30 22 and the second cathode 3023, the second anode 3021, the second light-emitting functional layer 3022 and the second cathode 3023 are stacked in sequence away from the third flat layer 9; the third sub-pixel 303 includes a third anode 3031, a third light-emitting functional layer 3032 and a third cathode 3033, and the third anode 3031, the third light-emitting functional layer 3032 and the third cathode 3033 are stacked in sequence away from the third flat layer 9; the thickness of the corresponding parts of the third flat layer 9 that are in contact with the first anode 3011, the second anode 3021 and the third anode 3031 are different, the thickness of the corresponding parts of the encapsulation layer 7 that are in contact with the first color resist 511, the second color resist 512 and the third color resist 513 are the same, the surfaces of the first color resist 511, the second color resist 512 and the third color resist 513 on the side facing away from the driving backplane 1 are flush, and the surface of the second flat layer 8 on the side facing away from the driving backplane 1 is flush.

[0171] In this embodiment, referring to FIG. 2 f , a groove or a protrusion may be provided on the surface of the third flat layer 9 on the side in contact with any one of the first anode 3011 , the second anode 3021 , and the third anode 3031 , so that the thicknesses of the portions of the third flat layer 9 corresponding to the portions in contact with the first anode 3011 , the second anode 3021 , and the third anode 3031 are different, thereby compensating for the thickness differences among the first color resist 511 , the second color resist 512 , and the third color resist 513 . This ensures that the surface of the second flat layer 8 facing away from the driving backplane 1 is flush, thereby ensuring that the morphologies of the first microlens unit 41 , the second microlens unit 42 , and the third microlens unit 43 formed on the side of the second flat layer 8 facing away from the color filter layer 5 are complete, thereby improving or avoiding light leakage at the edges of the sub-pixels 3 , improving or avoiding large viewing angle aberration and optical light leakage of the display panel, and improving or avoiding the display effect of the display panel.

[0172] In some embodiments, referring to Figure 2f, the average thickness of the first color resist 511, the second color resist 512 and the third color resist 513 is the first average, and the thickness difference of the corresponding portions of the third flat layer 9 in contact with the first anode 3011, the second anode 3021 and the third anode 3031 is the difference between the first color resist 511 and the first average, the difference between the second color resist 512 and the first average, and the difference between the third color resist 513 and the first average.

[0173] 2f , a groove or protrusion may be provided on the surface of the third flat layer 9 on the side in contact with any one of the first anode 3011, the second anode 3021, and the third anode 3031, so that the thicknesses of the portions of the third flat layer 9 corresponding to the portions in contact with the first anode 3011, the second anode 3021, and the third anode 3031 are different, thereby compensating for the difference between the first color resist 511 and the first mean, the difference between the second color resist 512 and the first mean, and the difference between the third color resist 513 and the first mean. This ensures that the surfaces of the first color resist 511, the second color resist 512, and the third color resist 513 facing away from the driving backplane 1 are flush, and the surface of the second flat layer 8 facing away from the driving backplane 1 is flush, thereby ensuring that the morphologies of the first microlens unit 41, the second microlens unit 42, and the third microlens unit 43 formed on the side of the second flat layer 8 facing away from the color filter layer 5 are complete.

[0174] In some embodiments, referring to Figure 2f, the thickness difference of the portion of the third flat layer 9 corresponding to the contact with the first anode 3011 and the second anode 3021 is the thickness difference between the first color resist 511 and the second color resist 512; the thickness difference of the portion of the third flat layer 9 corresponding to the contact with the first anode 3011 and the third anode 3031 is the thickness difference between the first color resist 511 and the third color resist 513.

[0175] In particular, a groove or a protrusion can be provided on the surface of the third flat layer 9 on the side in contact with the second anode 3021 and the third anode 3031, so that the surfaces of the second color resist 512 and the third color resist 513 on the side facing away from the driving backplate 1 are respectively flush with the surface of the first color resist 511 on the side facing away from the driving backplate 1, thereby compensating for the thickness difference between the second color resist 512 and the third color resist 513 and the first color resist 511, thereby achieving the flushness of the surfaces of the first color resist 511, the second color resist 512, and the third color resist 513 on the side facing away from the driving backplate 1, and the flushness of the surface of the second flat layer 8 on the side facing away from the driving backplate 1, thereby ensuring the complete morphology of the first microlens unit 41, the second microlens unit 42, and the third microlens unit 43 formed on the side of the second flat layer 8 facing away from the color filter layer 5.

[0176] In some embodiments, referring to Figures 2d, 2e and 2f, the display panel further includes a protective layer 10, which is located on the side of the microlens unit 4 away from the driving backplane 1; the second flat layer 8 has the same refractive index as the microlens unit 4; since the greater the difference in refractive index between the second flat layer 8 and the microlens unit 4, the less light output of the corresponding sub-pixel 3, such a setting can increase the light output of the sub-pixel 3, thereby improving the light output rate of the sub-pixel 3; the refractive index of the microlens unit 4 is greater than the refractive index of the protective layer 10; the refractive index of the microlens unit 4 is n2, and the refractive index of the protective layer 10 is n4, and n2-n4>0.09.

[0177] In some embodiments, n2-n4>0.14. In some embodiments, n2-n4>0.3. The greater the difference between the refractive index of the microlens unit 4 and the refractive index of the protective layer 10, the greater the cohesive effect of the microlens unit 4 on the light emitted by the sub-pixel 3, thereby further increasing the light emitting surface of the sub-pixel 3 and further increasing the light output of the sub-pixel 3.

[0178] In some embodiments, f = (n4 × R1) / (n2 - n4); f = h1 × n5 + h2 × n6 + h3 × n7; where f is the focal length of the microlens unit 4; R1 is the radius of the arc surface of the microlens unit 4 facing away from the driving backplane 1; h1 is the thickness of the second flat layer 8; n5 is the refractive index of the second flat layer 8; h2 is the thickness of the color resist 51 corresponding to the microlens unit 4; n6 is the refractive index of the color resist 51 corresponding to the microlens unit 4; h3 is the thickness of the portion of the encapsulation layer 7 corresponding to the microlens unit 4; and n7 is the refractive index of the portion of the encapsulation layer 7 corresponding to the microlens unit 4. This configuration places the focal point of the microlens unit 4 on the light-emitting surface of the sub-pixel 3, thereby further increasing the amount of light emitted by the sub-pixel 3.

[0179] In some embodiments, referring to FIG. 2 b , FIG. 2 d , FIG. 2 e and FIG. 2 f , the microlens unit 4 includes a microlens, and the duty ratio of the microlens in the orthographic projection area of ​​the opening where the sub-pixel 3 is located on the driving backplane 1 is 100%.

[0180] In some embodiments, referring to FIG3 , a schematic top view of a microlens unit corresponding to a sub-pixel in an embodiment of the present disclosure is shown; the microlens unit 4 includes a plurality of microlenses 40, and the duty ratio of the microlenses 40 in the orthographic projection area of ​​the opening where the sub-pixel 3 is located on the driver backplane 1 is greater than 70%. The greater the distribution density of the microlenses 40 in the orthographic projection area of ​​the opening where the sub-pixel 3 is located on the driver backplane 1, the greater the light extraction amount of the sub-pixel 3 and the better the light extraction effect.

[0181] In some embodiments, referring to Figures 4a and 4b, Figure 4a is a top view schematic diagram of one distribution of microlens units in an embodiment of the present disclosure; Figure 4b is a top view schematic diagram of another distribution of microlens units in an embodiment of the present disclosure; wherein, multiple sub-pixels are arranged in an array, and multiple microlens units 4 are arranged in an array. In Figure 4a, the microlens units 4 are arranged in a honeycomb pattern; in Figure 4b, the microlens units 4 are arranged in an orthogonal matrix.

[0182] In some embodiments, the radial dimension of the opening where the sub-pixel 3 is located is less than 10 μm. That is, the sub-pixel 3 in this embodiment is a silicon-based Micro OLED (Organic Light-Emitting Diode) device.

[0183] The display panel provided by the embodiment of the present disclosure provides a microlens unit on the side of the sub-pixel facing away from the driving backplane (i.e., the light-emitting side). The surface of the microlens unit on the side facing away from the driving backplane (i.e., the light-emitting surface) is a non-flat surface, which can suppress the interfacial total reflection of the light emitted by the sub-pixel, while increasing the light-emitting surface of the sub-pixel and causing the edge light on the light-emitting surface of the sub-pixel to be concentrated, thereby extracting more light and improving the light extraction rate of the sub-pixel; by making the figure of the microlens unit on any cross section perpendicular to the driving backplane and passing through the center of the orthographic projection of the microlens unit on the driving backplane an axially symmetrical figure, with the axis being the line passing through the center of the microlens unit on the driving backplane. The straight line is perpendicular to the driving backplane and is located at the center of the orthographic projection of the microlens unit. On any cross section of the microlens unit that is perpendicular to the driving backplane and passes through the center of the orthographic projection of the microlens unit on the driving backplane, the distance between any point on the side of the microlens unit that is away from the driving backplane and the center of the orthographic projection of the microlens unit on the driving backplane is D, the length of the side of the microlens unit close to the driving backplane is 2R, and 0.9≤D / R≤1.0. This ensures that the morphology of the microlens unit in the display panel is complete, thereby improving or avoiding the edge light leakage phenomenon of the sub-pixel, and further improving or avoiding the large viewing angle difference and optical light leakage phenomenon of the display panel, thereby improving or avoiding the display effect of the display panel.

[0184] In a second aspect, an embodiment of the present disclosure further provides a method for preparing the above-mentioned display panel, comprising: Step S01: preparing a driving backplane.

[0185] In this step, the pixel circuit in the driving backplane is prepared by a traditional patterning process (including film formation, exposure, development, etching and other steps), which will not be described here.

[0186] Step S02: preparing a pixel definition layer and a plurality of openings therein on one side of the driving backplane.

[0187] In this step, the film is prepared through a traditional exposure process (including film formation, exposure, development and other steps), and the specific process will not be repeated.

[0188] Step S03: preparing a plurality of sub-pixels; the plurality of sub-pixels are respectively located in different openings.

[0189] In this step, the reflective anode of the sub-pixel is prepared by a conventional patterning process; the light-emitting functional layer of the sub-pixel is prepared by an evaporation process; and the cathode of the sub-pixel is prepared by an evaporation process.

[0190] Step S04: preparing a plurality of micro lens units on a side of the plurality of sub-pixels away from the driving backplane.

[0191] In this step, the microlens unit can be made of polyimide or acrylic resin. The microlens unit is prepared by a printing process or a film coating followed by an exposure and patterning process. The specific process is relatively mature technology and will not be described in detail.

[0192] In which, multiple microlens units are distributed in a one-to-one correspondence with multiple sub-pixels, the orthographic projection of the microlens unit on the driving backplane covers the orthographic projection of the opening where the corresponding sub-pixel is located on the driving backplane, and the figure of the microlens unit on any cross-section perpendicular to the driving backplane and passing through the center of the orthographic projection of the microlens unit on the driving backplane is an axially symmetrical figure, where the axis is a straight line passing through the center of the orthographic projection of the microlens unit on the driving backplane and perpendicular to the driving backplane; on any cross-section of the microlens unit perpendicular to the driving backplane and passing through the center of the orthographic projection of the microlens unit on the driving backplane, the distance between any point on the side of the microlens unit away from the driving backplane and the center of the orthographic projection of the microlens unit on the driving backplane is D, the length of the side of the microlens unit close to the driving backplane is 2R, and 0.9≤D / R≤1.0.

[0193] In some embodiments, the method for manufacturing the display panel in FIG2b further includes forming a color filter layer on the side of the microlens unit facing away from the driving backplane. The color filter layer is formed using a conventional exposure process.

[0194] In some embodiments, the method for manufacturing the display panel in FIG. 2d further includes forming a color filter layer on the side of the microlens unit close to the driving backplane and on the side of the subpixel facing away from the driving backplane; and forming a second planar layer on the side of the color filter layer facing away from the driving backplane and on the side of the microlens unit close to the driving backplane. Forming the second planar layer includes forming a pattern of the second planar layer and forming grooves or protrusions on the side facing away from the driving backplane through a halftone exposure process.

[0195] In some embodiments, the method for manufacturing the display panel in FIG. 2e further includes forming a color filter layer on the side of the microlens unit close to the driving backplane and on the side of the subpixel facing away from the driving backplane; and forming an encapsulation layer on the side of the color filter layer close to the driving backplane and on the side of the subpixel facing away from the driving backplane. Forming the encapsulation layer includes forming a pattern of the encapsulation layer and forming grooves or protrusions on the side facing away from the driving backplane through a halftone exposure process.

[0196] In some embodiments, the method for manufacturing the display panel in FIG. 2f further includes forming a color filter layer on the side of the microlens unit close to the driving backplane and on the side of the subpixel facing away from the driving backplane; and forming a third planar layer on the side of the subpixel close to the driving backplane and on the side of the driving backplane close to the subpixel. Forming the third planar layer includes forming a pattern of the third planar layer and forming grooves or protrusions on the side facing away from the driving backplane through a halftone exposure process.

[0197] The method for manufacturing the display panel in the embodiment of the present disclosure is simple and can be implemented through traditional processes without adding any additional cost to the manufacturing process of the display panel.

[0198] In a third aspect, an embodiment of the present disclosure further provides a display device, comprising the display panel in the above embodiment.

[0199] By adopting the display panel in the above embodiment, the light extraction efficiency of the display device can be improved, while the large viewing angle difference and optical light leakage of the display device can be improved or avoided, thereby improving the display effect of the display device and thus enhancing the user experience.

[0200] The display device may be an AR (Augmented Reality) or VR (Virtual Reality) display device.

[0201] The display device provided in the embodiments of the present disclosure may be any product or component with a display function, such as an OLED panel, an OLED TV, an OLED billboard, a display, a mobile phone, or a navigation system.

[0202] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present disclosure, and the present disclosure is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present disclosure, and such modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A display panel, wherein: It includes a driving backplane, a pixel definition layer, a plurality of sub-pixels and a plurality of micro-lens units. The pixel definition layer is located on one side of the driving backplane, and a plurality of openings are formed in the pixel definition layer. The plurality of sub-pixels are respectively located in different openings; The plurality of microlens units are located on a side of the plurality of sub-pixels away from the driving backplane, and the plurality of microlens units are distributed in a one-to-one correspondence with the plurality of sub-pixels. The orthographic projection of the microlens unit on the driving backplane covers the orthographic projection of the opening where the corresponding sub-pixel is located on the driving backplane, The figure of the microlens unit on any cross section perpendicular to the driving backplane and passing through the center of the orthographic projection of the microlens unit on the driving backplane is an axisymmetric figure, and the axis is a straight line passing through the center of the orthographic projection of the microlens unit on the driving backplane and perpendicular to the driving backplane. On any cross section of the microlens unit that is perpendicular to the driving backplane and passes through the center of the orthographic projection of the microlens unit on the driving backplane, the distance between any point on the side of the microlens unit that is away from the driving backplane and the center of the orthographic projection of the microlens unit on the driving backplane is D, and the length of one side of the microlens unit close to the driving backplane is 2R, 0.9≤D / R≤1.

0.

2. The display panel according to claim 1, wherein: It also includes a color filter layer, which is located on a side of the plurality of microlens units away from the driving backplane; The color filter layer includes a black matrix and a plurality of color resists. The black matrix and the plurality of color resists are arranged in the same layer, The plurality of color resists are distributed in one-to-one correspondence with the plurality of sub-pixels; The orthographic projection of the color resist on the driving backplane covers the orthographic projection of the opening where the corresponding sub-pixel is located on the driving backplane.

3. The display panel according to claim 1, wherein: It also includes a color filter layer, which is located on a side of the plurality of sub-pixels away from the driving backplane and on a side of the plurality of micro-lens units close to the driving backplane; The color filter layer includes a black matrix and a plurality of color resists. The black matrix and the plurality of color resists are arranged in the same layer, The plurality of color resists are distributed in one-to-one correspondence with the plurality of sub-pixels; The orthographic projection of the color resist on the driving backplane covers the orthographic projection of the opening where the corresponding sub-pixel is located on the driving backplane.

4. The display panel according to any one of claims 1 to 3, wherein: The surface of the microlens unit on one side away from the driving back plate is an arc surface, A surface of one side of the microlens unit close to the driving back plate is a plane.

5. The display panel according to claim 4, wherein: The angle between a tangent line at the intersection of the arc surface of the microlens unit with the plane and the plane is in the range of 40° to 90°.

6. The display panel according to claim 4, wherein: The distance between the vertex of the arc surface and the center of the plane is H, and the radius of the plane is R'. The range of H / R' is 0.4~1.

7. The display panel according to claim 2, wherein: The orthographic projection area of ​​the microlens unit on the driving backplane is not less than the orthographic projection area of ​​the opening where the corresponding sub-pixel is located on the driving backplane, The orthographic projection area of ​​the color resist on the driving backplane is not less than the orthographic projection area of ​​the corresponding microlens unit on the driving backplane.

8. The display panel according to claim 3, wherein: The orthographic projection area of ​​the color resist on the driving backplane is not less than the orthographic projection area of ​​the opening where the corresponding sub-pixel is located on the driving backplane, The orthographic projection area of ​​the microlens unit on the driving backplane is not less than the orthographic projection area of ​​the corresponding color resist on the driving backplane.

9. The display panel according to claim 3, wherein: The plurality of sub-pixels include a plurality of first sub-pixels, a plurality of second sub-pixels, and a plurality of third sub-pixels. The plurality of color resists include a plurality of first color resists, a plurality of second color resists and a plurality of third color resists, The first color resist, the second color resist and the third color resist have different colors; The first sub-pixel corresponds to the first color resistor, and the two have the same color; The second sub-pixel corresponds to the second color resistor, and the two have the same color; The third sub-pixel corresponds to the third color resistor, and the two have the same color; The openings where the first sub-pixel, the second sub-pixel and the third sub-pixel are located have different opening areas; The first color resist, the second color resist and the third color resist have different thicknesses; The plurality of microlens units include a plurality of first microlens units, a plurality of second microlens units and a plurality of third microlens units, The first sub-pixel corresponds to the first micro-lens unit; The second sub-pixel corresponds to the second micro-lens unit; The third sub-pixel corresponds to the third micro-lens unit; The first microlens unit, the second microlens unit and the third microlens unit are the same in size and shape.

10. The display panel according to claim 2, wherein: Also includes a first planar layer and a packaging layer, The encapsulation layer is located on a side of the plurality of sub-pixels away from the driving backplane, and is located on a side of the plurality of micro-lens units close to the driving backplane. The surface of the encapsulation layer on one side facing away from the driving backplane is flush; The first flat layer is located on a side of the plurality of microlens units away from the driving backplane, and is located on a side of the color filter layer close to the driving backplane. A surface of the first flat layer facing away from the driving back plate is flush.

11. The display panel according to claim 10, wherein: The encapsulation layer has the same refractive index as the microlens unit; The refractive index of the microlens unit is greater than the refractive index of the first flat layer; The refractive index of the microlens unit is n2, the refractive index of the first flat layer is n3, n2-n3>0.

09.

12. The display panel according to claim 11, wherein: f=(n3×R1) / (n2-n3); f=h×n1; Among them, f is the focal length of the microlens unit; R1 is the radius of the arc surface when the surface of the microlens unit facing away from the driving backplane is an arc surface; h is the thickness of the packaging layer; n1 is the refractive index of the packaging layer.

13. The display panel according to claim 9, wherein: It also includes a packaging layer and a second planarization layer, The encapsulation layer is located on a side of the plurality of sub-pixels away from the driving backplane, and is located on a side of the color filter layer close to the driving backplane. The second flat layer is located on a side of the color filter layer away from the driving backplane, and is located on a side of the microlens unit close to the driving backplane. The surface of the encapsulation layer on one side facing away from the driving backplane is flush; The surface area of ​​the second flat layer that contacts the first microlens unit, the second microlens unit, and the third microlens unit is flush with each other. Parts of the second planar layer that contact the first microlens unit, the second microlens unit, and the third microlens unit have different thicknesses.

14. The display panel according to claim 13, wherein: The average thickness of the first color resist, the second color resist and the third color resist is a first average value, The thickness difference of the portion of the second flat layer corresponding to the contact with the first microlens unit, the second microlens unit and the third microlens unit is the difference between the difference between the first color resist and the first average, the difference between the second color resist and the first average, and the difference between the third color resist and the first average.

15. The display panel according to claim 13, wherein: The thickness difference of the portion of the second flat layer corresponding to the contact with the first microlens unit and the second microlens unit is the thickness difference between the first color resist and the second color resist; The thickness difference of the portion of the second planar layer corresponding to the portion in contact with the first microlens unit and the third microlens unit is the thickness difference between the first color resist and the third color resist.

16. The display panel according to claim 9, wherein: It also includes a packaging layer and a second planarization layer, The encapsulation layer is located on a side of the plurality of sub-pixels away from the driving backplane, and is located The color filter layer is located on a side close to the driving backplane. The second flat layer is located on a side of the color filter layer away from the driving backplane, and is located on a side of the microlens unit close to the driving backplane. The thickness of the portion of the encapsulation layer that contacts the first color resist, the second color resist, and the third color resist is different. The surfaces of the first color resistor, the second color resistor and the third color resistor facing away from the driving backplane are flush with each other. A surface of the second flat layer facing away from the driving back plate is flush.

17. The display panel according to claim 16, wherein: The average thickness of the first color resist, the second color resist and the third color resist is a first average value, The thickness difference of the portions of the encapsulation layer corresponding to the contact with the first color resist, the second color resist and the third color resist is the difference between the difference between the first color resist and the first average, the difference between the second color resist and the first average, and the difference between the third color resist and the first average.

18. The display panel according to claim 16, wherein: The thickness difference of the portion of the encapsulation layer corresponding to the contact with the first color resist and the second color resist is the thickness difference between the first color resist and the second color resist; The thickness difference of the portion of the encapsulation layer corresponding to the portion in contact with the first color resist and the third color resist is the thickness difference of the first color resist and the third color resist.

19. The display panel according to claim 9, wherein: It also includes a packaging layer, a second planarization layer and a third planarization layer, The encapsulation layer is located on a side of the plurality of sub-pixels away from the driving backplane, and is located on a side of the color filter layer close to the driving backplane. The second flat layer is located on a side of the color filter layer away from the driving backplane, and is located on a side of the microlens unit close to the driving backplane. The third planar layer is located on a side of the plurality of sub-pixels close to the driving backplane, and is located on a side of the driving backplane close to the plurality of sub-pixels. The first sub-pixel comprises a first anode, a first light-emitting functional layer and a first cathode, wherein the first anode, the first light-emitting functional layer and the first cathode are sequentially stacked away from the third planar layer; The second sub-pixel comprises a second anode, a second light-emitting functional layer and a second cathode, wherein the second anode, the second light-emitting functional layer and the second cathode are sequentially stacked away from the third planar layer; The third sub-pixel comprises a third anode, a third light-emitting functional layer and a third cathode, wherein the third anode, the third light-emitting functional layer and the third cathode are sequentially stacked away from the third planar layer; The thickness of the third flat layer corresponding to the contacting parts of the first anode, the second anode and the third anode is different. The thickness of the portion of the encapsulation layer that contacts the first color resist, the second color resist, and the third color resist is the same, The surfaces of the first color resistor, the second color resistor and the third color resistor facing away from the driving backplane are flush with each other. A surface of the second flat layer facing away from the driving back plate is flush.

20. The display panel according to claim 19, wherein: The average thickness of the first color resist, the second color resist and the third color resist is a first average value, The thickness difference of the portion of the third planar layer corresponding to the contact with the first anode, the second anode and the third anode is the difference between the first color resistance and the first average value, the difference between the second color resistance and the first average value and the difference between the third color resistance and the first average value. The difference between.

21. The display panel according to claim 19, wherein: The thickness difference of the portion of the third planar layer corresponding to the contact with the first anode and the second anode is the thickness difference of the first color resist and the second color resist; The thickness difference of the portion of the third planar layer corresponding to the portion in contact with the first anode and the third anode is the thickness difference of the first color resist and the third color resist.

22. The display panel according to any one of claims 13 to 21, wherein: It also includes a protective layer located on a side of the microlens unit that is away from the driving backplane; The second flat layer has the same refractive index as the microlens unit; The refractive index of the microlens unit is greater than the refractive index of the protective layer; The refractive index of the microlens unit is n2, the refractive index of the protective layer is n4, n2-n4>0.

09.

23. The display panel according to claim 22, wherein: f=(n4×R1) / (n2-n4); f=h1×n5+h2×n6+h3×n7; Among them, f is the focal length of the microlens unit; R1 is the radius of the arc surface when the surface of the microlens unit facing away from the driving backplane is an arc surface; h1 is the thickness of the second flat layer; n5 is the refractive index of the second flat layer; h2 is the thickness of the color resist corresponding to the microlens unit; n6 is the refractive index of the color resist corresponding to the microlens unit; h3 is the thickness of the encapsulation layer portion corresponding to the microlens unit; n7 is the refractive index of the encapsulation layer portion corresponding to the microlens unit.

24. The display panel according to claim 1, wherein: The microlens unit comprises a microlens, and the duty ratio of the microlens in the orthographic projection area of ​​the opening where the sub-pixel is located on the driving backplane is 100%; Alternatively, the microlens unit includes a plurality of microlenses, and the duty ratio of the microlenses in the orthographic projection area of ​​the opening where the sub-pixel is located on the driving backplane is greater than 70%.

25. The display panel according to claim 24, wherein: The multiple sub-pixels are arranged in an array, The plurality of micro lens units are arranged in an array.

26. A method for preparing a display panel, wherein: include: preparing a drive backplane; Preparing a pixel definition layer and a plurality of openings therein on one side of the driving backplane; preparing a plurality of sub-pixels; The plurality of sub-pixels are respectively located in different openings; Preparing a plurality of microlens units on a side of the plurality of sub-pixels away from the driving backplane; The plurality of microlens units are distributed in a one-to-one correspondence with the plurality of sub-pixels, The orthographic projection of the microlens unit on the driving backplane covers the orthographic projection of the opening where the corresponding sub-pixel is located on the driving backplane, The figure of the microlens unit on any cross section perpendicular to the driving backplane and passing through the center of the orthographic projection of the microlens unit on the driving backplane is an axisymmetric figure, and the axis is a straight line passing through the center of the orthographic projection of the microlens unit on the driving backplane and perpendicular to the driving backplane. On any cross section of the microlens unit that is perpendicular to the driving backplane and passes through the center of the orthographic projection of the microlens unit on the driving backplane, the distance between any point on the side of the microlens unit that is away from the driving backplane and the center of the orthographic projection of the microlens unit on the driving backplane is D, and the length of one side of the microlens unit close to the driving backplane is 2R, 0.9≤D / R≤1.

0.

27. A display device, wherein: A display panel comprising any one of claims 1-25.

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