Display panel and display device

Abstract

This application provides a display panel and a display device. The display panel includes a display functional layer and an anti-reflection functional layer. The display functional layer includes a light-emitting element. The anti-reflection functional layer is disposed on the side of the display functional layer along its thickness direction near the light-emitting surface of the display panel. The anti-reflection functional layer includes a first sub-layer and a second sub-layer stacked along the thickness direction. The first sub-layer is at least partially embedded in the second sub-layer. The first sub-layer and the second sub-layer have different refractive indices. The cross-section of the at least partially anti-reflection functional layer parallel to the light-emitting surface includes a first cross-section corresponding to the first sub-layer and a second cross-section corresponding to the second sub-layer. The ratio of the area occupied by the first cross-section to the area occupied by the second cross-section varies along the thickness direction. Since the refractive index of the at least partially anti-reflection functional layer varies along the thickness direction, when ambient light is incident into the interior of the anti-reflection functional layer, the reflectivity of the ambient light is reduced because there is no optical interface with a large difference in refractive index.

Description

Technical Field

[0001] This application relates to the field of display panel manufacturing technology, and in particular to a display panel and a display device. Background Technology

[0002] Organic light-emitting diode (OLED) displays have many advantages, such as self-illumination, fast response, wide viewing angle, and the ability to be fabricated on flexible substrates, and are increasingly being used in the field of high-performance displays.

[0003] In related technologies, when ambient light from outside the display panel enters the display panel, it will illuminate the relevant film layer and undergo total internal reflection in the relevant film layer, and then shine back into the environment. Thus, the reflection of ambient light by the display panel can easily interfere with the normal display of the display panel. Summary of the Invention

[0004] This application provides a display panel and a display device to reduce the interference of ambient light reflection on the display panel with the normal display of the display panel.

[0005] In a first aspect, the display panel provided according to the embodiments of this application includes a display functional layer and an anti-reflection functional layer; the display functional layer includes a light-emitting element; the anti-reflection functional layer is disposed on the side of the display functional layer close to the light-emitting surface of the display panel along the thickness direction, the anti-reflection functional layer includes a first sub-layer and a second sub-layer stacked along the thickness direction, the first sub-layer is at least partially embedded in the second sub-layer, the refractive indices of the first sub-layer and the second sub-layer are different, and the cross section of at least part of the anti-reflection functional layer parallel to the light-emitting surface includes a first cross section corresponding to the first sub-layer and a second cross section corresponding to the second sub-layer, the ratio of the area occupied by the first cross section to the area occupied by the second cross section varies along the thickness direction.

[0006] In some embodiments, the ratio of the area occupied by the first cross section to the area occupied by the second cross section varies continuously along the thickness direction.

[0007] In some embodiments, along the direction closer to the light-emitting surface, the ratio of the area occupied by the first cross section to the area occupied by the second cross section gradually decreases.

[0008] In some embodiments, the protrusion gradually decreases in cross-section perpendicular to the thickness direction in the direction from the first sub-layer to the second sub-layer.

[0009] In some embodiments, the refractive index of the first sublayer is greater than the refractive index of the second sublayer.

[0010] In some embodiments, the refractive index n1 of the first sublayer and the refractive index n2 of the second sublayer satisfy: n1-n2≥0.1.

[0011] In some embodiments, 1.7 ≤ n1 ≤ 2.2.

[0012] In some embodiments, 1.2 ≤ n2 ≤ 1.7.

[0013] In some embodiments, the thickness of the anti-reflection functional layer does not exceed 5 μm.

[0014] In some embodiments, the first sublayer includes a plurality of protrusions and the second sublayer includes a plurality of grooves, the protrusions and grooves cooperating with each other.

[0015] In some embodiments, the protrusion gradually decreases in cross-section perpendicular to the thickness direction in the direction from the first sub-layer to the second sub-layer.

[0016] In some embodiments, the protrusion is conical, frustum-shaped (smaller at the top and larger at the bottom), truncated square (smaller at the top and larger at the bottom), pyramidal, semi-ellipsoidal, or pyramidal.

[0017] In some embodiments, along a direction perpendicular to the thickness direction, the distance w between two adjacent protrusions satisfies: 100nm ≤ w ≤ 2000nm.

[0018] In some embodiments, along the thickness direction, the size h of the protrusion satisfies: 200nm ≤ h ≤ 3000nm.

[0019] In some embodiments, the material of the first sublayer includes at least one of silicon dioxide, titanium dioxide, zirconium dioxide, aluminum oxide, zinc oxide, magnesium oxide, silicon nitride, aluminum nitride, zinc sulfide, magnesium difluoride, calcium difluoride, sodium fluoride, barium difluoride, lithium fluoride, and gallium boride.

[0020] In some embodiments, the material of the second sublayer includes at least one of polyimide, epoxy resin, and acrylic resin.

[0021] In some embodiments, the transmittance T of the second sublayer satisfies: 50% ≤ T ≤ 95%.

[0022] In some embodiments, the transmittance T of the second sublayer satisfies: 60% ≤ T ≤ 70%.

[0023] In some embodiments, the display panel further includes an encapsulation layer and a cover plate, wherein the encapsulation layer is disposed between the display functional layer and the anti-reflection functional layer, and the anti-reflection functional layer is disposed between the encapsulation layer and the cover plate.

[0024] In some embodiments, the encapsulation layer includes an encapsulation sublayer, a first sublayer is located between the encapsulation sublayer and a second sublayer, and the first sublayer and the encapsulation sublayer are integrally formed.

[0025] In some embodiments, the display functional layer further includes a pixel definition layer having pixel openings, with light-emitting elements disposed within the pixel openings, and the pixel definition layer enabling the light-emitting elements to be insulated from each other; the pixel definition layer includes a black material.

[0026] Secondly, embodiments of this application provide a display device, including the display panel provided in any of the above embodiments.

[0027] The display panel and display device provided in this application embodiment have an anti-reflection functional layer. The first sub-layer and the second sub-layer of the anti-reflection functional layer have different refractive indices. Since the ratio of the area occupied by the first cross-section to the area occupied by the second cross-section in the cross-section parallel to the light-emitting surface of the anti-reflection functional layer changes along the thickness direction, at least part of the refractive index of the anti-reflection functional layer is in a state of change along the thickness direction. In this way, when ambient light is incident into the interior of the anti-reflection functional layer, since there is no optical interface with a large difference in refractive index, the reflectivity of the ambient light is reduced. Attached Figure Description

[0028] The features, advantages, and technical effects of exemplary embodiments of the present application will now be described with reference to the accompanying drawings. In the drawings, the same parts are referred to by the same reference numerals. The drawings are not drawn to scale.

[0029] Figure 1 A top view of a display panel provided in an embodiment of this application;

[0030] Figure 2 for Figure 1 A schematic diagram of a cross-sectional structure along AA;

[0031] Figure 3 for Figure 1 Another sectional view of the structure along AA;

[0032] Figure 4 for Figure 1 Another sectional view of the structure along AA;

[0033] Figure 5 for Figure 1 Another sectional view of the structure along AA;

[0034] Figure 6 for Figure 1 Another sectional view of the structure along AA;

[0035] Figure 7 A top view of the display device provided in an embodiment of this application.

[0036] The accompanying drawings are not necessarily drawn to scale.

[0037] Explanation of reference numerals in the attached figures:

[0038] 100. Display panel;

[0039] 110. Display Function Layer; 111. Light Emitting Element; 1111. First Light Emitting Element; 1112. Second Light Emitting Element; 1113. Third Light Emitting Element; 112. Pixel Definition Layer;

[0040] 120, Anti-reflection functional layer; 120a, First sub-section; 120b, Second sub-section; 120c, Third sub-section; 121, First sub-layer; 1211, Protrusion; 122, Second sub-layer; 1221, Groove;

[0041] 130. Cover plate;

[0042] 140. Encapsulation layer; 141. Encapsulation sublayer;

[0043] 10. Display device;

[0044] X, thickness direction; S, cross section; S1, first cross section; S2, second cross section. Detailed Implementation

[0045] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples. In the accompanying drawings and the following description, at least some well-known structures and techniques are not shown to avoid unnecessarily obscuring the application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0046] Furthermore, for the sake of understanding and ease of description, the dimensions and thicknesses of each configuration shown in the figures are arbitrarily illustrated, but the concept of this application is not limited thereto. In the figures, the thicknesses of layers, films, panels, and regions, etc., are enlarged for clarity. In the figures, the thicknesses of some layers and regions are enlarged for better understanding and ease of description.

[0047] It is understandable that when an element such as a layer, film, region, or substrate is described as being "on" another element, the element may be directly on that other element, or there may be intermediate elements present. In contrast, when an element is described as being "directly on" another element, there are no intermediate elements present. Furthermore, throughout the specification, the phrase "on" the target element indicates that it is positioned above or below the target element and does not necessarily indicate that it is positioned "on the upper side" based on the direction of gravity.

[0048] Furthermore, unless explicitly stated otherwise, the word "including" will be understood to include the stated elements but not exclude any other elements.

[0049] In electronic devices such as mobile phones and tablets, conductive layers are typically placed inside the display panel. These layers could be metal layers in driving transistors or cathodes or anodes in light-emitting devices, used to drive the display. In these technologies, during normal use, ambient light shines onto the conductive layers inside the display panel. This light undergoes total internal reflection and is reflected back into the environment. Thus, the reflected light from the ambient light inside the display panel interferes with its normal display, affecting its display quality.

[0050] In view of the above, this application provides a display panel and a display device. The following will describe various embodiments of the display panel and the display device with reference to the accompanying drawings.

[0051] This application provides a display panel, which may be an organic light-emitting diode (OLED) display panel.

[0052] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the display panel 100 provided according to the embodiments of this application includes a display functional layer 110 and an anti-reflection functional layer 120. The display functional layer 110 includes a light-emitting element 111. The anti-reflection functional layer 120 is disposed on the side of the display functional layer 110 along the thickness direction X close to the light-emitting surface of the display panel 100. The anti-reflection functional layer 120 includes a first sub-layer 121 and a second sub-layer 122 stacked along the thickness direction X. The first sub-layer 121 is at least partially embedded in the second sub-layer 122. The refractive indices of the first sub-layer 121 and the second sub-layer 122 are different. The cross section S of the at least partially anti-reflection functional layer 120 parallel to the light-emitting surface includes a first cross section S1 corresponding to the first sub-layer 121 and a second cross section S2 corresponding to the second sub-layer 122. The ratio of the area occupied by the first cross section S1 to the area occupied by the second cross section S2 varies along the thickness direction.

[0053] The display function layer 110 enables the display function of the display panel 100. It includes a light-emitting element 111, which can be an organic light-emitting diode (OLED), and the corresponding display panel 100 is an OLED display panel. Alternatively, the light-emitting element 111 can also be a micro light-emitting diode, and the corresponding display panel 100 is a Micro-LED display panel.

[0054] In an embodiment where the light-emitting element 111 is an organic light-emitting diode, the light-emitting element 111 includes a cathode, an anode, and an organic light-emitting layer. The organic light-emitting layer is located between the cathode and the anode. Under the action of an applied voltage, electrons generated by the cathode and holes generated by the anode migrate to the organic light-emitting layer and recombine in the organic light-emitting layer to emit light of the corresponding color.

[0055] The display functional layer 110 may also include a driving backplane, in which a driving circuit is disposed. The driving circuit is electrically connected to the light-emitting element 111 to drive the light-emitting element 111 to emit light. The driving circuit may include a driving transistor, which includes a source, a drain, a gate, and an active layer. Taking an organic light-emitting diode as an example, the source or drain of the driving transistor is electrically connected to the anode of the light-emitting element 111 to provide a corresponding driving current to the anode.

[0056] The first cross-section S1 can be the portion of the first sub-layer 121 in the cross-section S of the anti-reflection functional layer 120 parallel to the light-emitting surface, and the second cross-section S2 can be the portion of the second sub-layer 122 in the cross-section S of the anti-reflection functional layer 120 parallel to the light-emitting surface. The ratio of the area occupied by the first cross-section S1 to the area occupied by the second cross-section S2 varies along the thickness direction; that is, along the thickness direction, the ratio of the area of ​​the first cross-section S1 and the second cross-section S2 in the multiple cross-sections S of the anti-reflection functional layer is different for each layer.

[0057] The anti-reflection functional layer 120 includes a first sub-layer 121 and a second sub-layer 122. The first sub-layer 121 and the second sub-layer 122 have different refractive indices. The refractive index of the first sub-layer 121 is n1, and the refractive index of the second sub-layer 122 is n2. The reflectivity m of light incident perpendicularly from the second sub-layer 122 to the first sub-layer 121 satisfies: m = [(n1-n2) / (n1+n2)] 2 Since the ratio of the area occupied by the first section S1 to the area occupied by the second section S2 in section S changes continuously along the thickness direction, the refractive index of at least part of the anti-reflection functional layer 120 changes continuously along the thickness direction. As a result, when ambient light is incident into the interior of the anti-reflection functional layer 120, since there is no optical interface with a large difference in refractive index, the reflectivity of the ambient light is reduced.

[0058] Optionally, the ratio of the area occupied by the first cross section S1 to the area occupied by the second cross section S2 can be set to change continuously throughout the entire anti-reflection functional layer 120 in the thickness direction, or the ratio of the area occupied by the first cross section S1 to the area occupied by the second cross section S2 can be set to change continuously only in a portion of the anti-reflection functional layer 120 in the thickness direction.

[0059] Optionally, the anti-reflection functional layer 120 may include a first sublayer 121 and a second sublayer 122. Alternatively, the anti-reflection functional layer 120 may include multiple first sublayers 121 and multiple second sublayers 122. The refractive indices of the different first sublayers 121 may be the same, or the refractive indices of the different first sublayers 121 may be different. Similarly, the refractive indices of the different second sublayers 122 may be the same, or the refractive indices of the different second sublayers 122 may be different.

[0060] It is understood that the anti-reflection functional layer 120 includes a first sub-layer 121 and a second sub-layer 122. The structure of the anti-reflection functional layer 120 is simple. By reducing the reflection of external ambient light by the display panel 100 through the anti-reflection functional layer 120, it is beneficial to simplify the manufacturing process of the display panel 100.

[0061] The display panel 100 may also have a cover plate 130, which may include inorganic materials and be disposed on the side of the anti-reflection functional layer 120 away from the display functional layer 110, so as to prevent external water, oxygen and other substances from entering the display functional layer 110 and causing certain corrosion to the light-emitting device or related conductive layer.

[0062] The display panel 100 provided in this embodiment has an anti-reflection functional layer 120, which includes a first sub-layer 121 and a second sub-layer 122. The first sub-layer 121 and the second sub-layer 122 have different refractive indices. Since the ratio of the area occupied by the first cross-section S1 of the first sub-layer 121 to the area occupied by the second cross-section S2 of the second sub-layer 122 in the cross-section S parallel to the light-emitting surface of the anti-reflection functional layer 120 changes continuously along the thickness direction, at least a portion of the refractive index of the anti-reflection functional layer 120 changes continuously along the thickness direction. As a result, when ambient light is incident into the interior of the anti-reflection functional layer 120, since there is no optical interface with a large difference in refractive index, the reflectivity of the ambient light is reduced.

[0063] In some embodiments, the ratio of the area occupied by the first section S1 corresponding to the first sub-layer 121 to the area occupied by the second section S2 corresponding to the second sub-layer 122 in section S varies continuously along the thickness direction X.

[0064] Thus, the ratio of the area occupied by the first cross section S1 of the first sublayer 121 to the area occupied by the second cross section S2 of the second sublayer 122 in the anti-reflection functional layer 120 changes continuously along the thickness direction. Therefore, at least part of the refractive index of the anti-reflection functional layer 120 changes continuously along the thickness direction. As a result, when ambient light is incident into the interior of the anti-reflection functional layer 120, since there is no optical interface with a large difference in refractive index, the reflectivity of the ambient light is reduced.

[0065] In some embodiments, along the direction close to the light-emitting surface, the ratio of the area occupied by the first cross section S1 to the area occupied by the second cross section S2 in the cross section S gradually decreases continuously.

[0066] The first cross section S1 is the portion of cross section S corresponding to the first sub-layer 121. The first sub-layer 121 can be located on the side of the second sub-layer 122 close to the display functional layer 110. Thus, along the direction away from the display functional layer 110, the area of ​​the first cross section S1 gradually decreases. After the first sub-layer 121 is formed, it is easier for the second sub-layer 122 to be embedded into the first sub-layer 121 during the preparation of the second sub-layer 122, which helps to reduce the process difficulty of preparing the first sub-layer 121 and the second sub-layer 122.

[0067] In some embodiments, the first sub-layer 121 is disposed between the second sub-layer 122 and the display functional layer 110, and the first sub-layer 121 is closer to the display functional layer 110 than the second sub-layer 122, and the refractive index of the first sub-layer 121 is greater than the refractive index of the second sub-layer 122.

[0068] Setting the refractive index of the first sub-layer 121 to be greater than that of the second sub-layer 122 is beneficial to improving the refractive index matching of the light emitted by the light-emitting element 111 at the interface between the first sub-layer 121 and the second sub-layer 122, thereby improving the light emission efficiency of the display panel 100.

[0069] In some embodiments, the refractive index n1 of the first sub-layer 121 and the refractive index n2 of the second sub-layer 122 satisfy: n1-n2≥0.1. Setting n1-n2≥0.1 is beneficial to further improve the refractive index matching of the light emitted by the light-emitting element 111 at the interface between the first sub-layer 121 and the second sub-layer 122, and further improve the light extraction efficiency of the display panel 100.

[0070] In some embodiments, the refractive index n1 of the first sublayer 121 satisfies: 1.7≤n1≤2.2.

[0071] Optionally, n1 can be 1.7, 1.8, 1.9, 2.0, 2.1, or 2.2, etc.

[0072] Setting 1.7≤n1≤2.2 ensures that the light emitted by the first sub-layer 121 propagates normally to the light-emitting element 111, while facilitating the realization of n1-n2≥0.1, which is beneficial to ensuring the normal light output efficiency of the display panel 100.

[0073] In some embodiments, the refractive index of the second sublayer 122 satisfies: 1.2≤n2≤1.7.

[0074] Optionally, n2 can be 1.2, 1.3, 1.4, 1.5, 1.6, or 1.7, etc.

[0075] Setting 1.2≤n2≤1.7 ensures that the light emitted by the light-emitting element 111 propagates normally from the second sub-layer 122, while facilitating the achievement of n1-n2≥0.1, which is beneficial to ensuring the normal light output efficiency of the display panel 100.

[0076] In some embodiments, the thickness of the anti-reflection functional layer 120 does not exceed 5 μm.

[0077] Optionally, the thickness of the anti-reflection functional layer 120 can be 5μm, 4μm, 3μm, 2μm or 1μm, etc.

[0078] Setting the thickness of the anti-reflection functional layer 120 to no more than 5μm helps to reduce the thickness of the display panel 100, making it more suitable for flexible display panels such as foldable or rollable panels.

[0079] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 In some embodiments, the first sublayer 121 includes a plurality of protrusions 1211, and the second sublayer 122 includes a plurality of grooves 1221, with the protrusions 1211 and the grooves 1221 cooperating with each other.

[0080] Alternatively, the protrusion 1211 can be in the shape of a frustum, a cone, a square frustum, a square cone, a semi-ellipsoid, or a pyramid, etc., with the top smaller than the bottom.

[0081] Please continue reading. Figure 1 , Figure 2 , Figure 3 and Figure 4 In some embodiments, the protrusion 1211 gradually decreases along the cross section S1 perpendicular to the thickness direction X in the direction from the first sub-layer 121 to the second sub-layer 122.

[0082] Thus, at least a portion of the interface between the protrusion 1211 and the groove 1221 is inclined relative to the thickness direction X, and the refractive index of at least a portion of the anti-reflection functional layer is continuously varied along the thickness direction X. As a result, when ambient light is incident into the interior of the anti-reflection functional layer, since there is no optical interface with a large difference in refractive index, the reflectivity of the ambient light is reduced.

[0083] Optionally, the first sub-layer 121 is disposed between the second sub-layer 122 and the display function layer 110. The first sub-layer 121 is formed first, and then the second sub-layer 122 is prepared on the first sub-layer 121.

[0084] Therefore, along the direction from the first sub-layer 121 to the second sub-layer 122, the protrusion 1211 gradually decreases along the cross section S1 perpendicular to the thickness direction X, which is beneficial to further reduce the reflectivity of ambient light and to reduce the process difficulty of the anti-reflection functional layer 120 during the preparation process.

[0085] The protrusion 1211 can be a structure of any shape, as long as the refractive index change of the anti-reflection functional layer 120 along the thickness direction is achieved.

[0086] In some embodiments, the protrusion 1211 is conical, frustum-shaped (smaller at the top and larger at the bottom), frustum-shaped (smaller at the top and larger at the bottom), pyramidal, semi-ellipsoidal, or pyramidal.

[0087] Thus, the cross-section S of the protrusion 1211 along the thickness direction X is circular, triangular, or trapezoidal. Multiple protrusions 1211 can be provided with the same dimensions along the thickness direction X, which facilitates the processing and forming of the protrusion 1211.

[0088] The protrusions 1211 are set in the shape of cones, frustums with smaller tops and larger bottoms, square frustums with smaller tops and larger bottoms, square pyramids, semi-ellipsoids with smaller tops and larger bottoms, or pyramids. This facilitates the reduction of ambient light reflectivity and also facilitates the processing and shaping of the first sub-layer 121 and the second sub-layer 122.

[0089] Please continue reading. Figure 1 , Figure 2 , Figure 3 Hehe Figure 4 In some embodiments, the spacing w between two adjacent protrusions 1211 along the direction perpendicular to the thickness direction X satisfies: 100nm≤w≤2000nm.

[0090] Optionally, the spacing w between two adjacent protrusions 1211 along the direction perpendicular to the thickness direction X can be: 100nm, 200nm, 300nm, 400nm, 500nm, 600nm, 700nm, 800nm, 900nm, 1000nm, 1100nm, 1200nm, 1300nm, 1400nm, 1500nm, 1600nm, 1700nm, 1800nm, 1900nm, or 2000nm, etc.

[0091] It is understandable that, since the protrusion 1211 and the groove 1221 cooperate with each other, if the spacing between two adjacent protrusions 1211 is set to meet the above-mentioned numerical range, then the two adjacent grooves 1221 of the corresponding second sub-layer 122 will also meet the above-mentioned numerical range.

[0092] Setting the spacing w between two adjacent protrusions 1211 to satisfy 100nm≤w≤2000nm is beneficial to ensuring the fit between the protrusion 1211 and the groove 1221, thereby further reducing the reflectivity of ambient light, and also helps to reduce the process difficulty of combining the first sub-layer 121 and the second sub-layer 122.

[0093] Please continue reading. Figure 1 , Figure 2 , Figure 3 and Figure 4 In some embodiments, along the thickness direction X, the size h of the protrusion 1211 satisfies: 200nm≤h≤3000nm.

[0094] Optionally, h can be: 200nm, 300nm, 400nm, 500nm, 600nm, 700nm, 800nm, 900nm, 1000nm, 1100nm, 1200nm, 1300nm, 1400nm, 1500nm, 1600nm, 1700nm, 1800nm, 1900nm, 2000nm, 2100nm, 2200nm, 2300nm, 2400nm, 2500nm, 2600nm, 2700nm, 2800nm, 2900nm, or 3000nm, etc.

[0095] Since the protrusion 1211 and the groove 1221 cooperate with each other, if the size of the protrusion 1211 along the thickness direction X satisfies the above-mentioned numerical range, then the size of the groove 1221 of the corresponding second sub-layer 122 along the thickness direction X also satisfies the above-mentioned numerical range.

[0096] This design helps to ensure the fit between the protrusion 1211 and the groove 1221, thereby further reducing the reflectivity of ambient light and also reducing the process difficulty of combining the first sub-layer 121 and the second sub-layer 122.

[0097] like Figure 1 and Figure 5 As shown, in some embodiments, the light-emitting element 111 includes a first light-emitting element 1111 for emitting red light, a second light-emitting element 1112 for emitting green light, and a third light-emitting element 1113 for emitting blue light. The anti-reflection functional layer 120 includes a first sub-part 120a, a second sub-part 120b, and a third sub-part 120c. At least a portion of the orthographic projection of the first sub-part 120a along the thickness direction X is located within the region where the first light-emitting element 1111 is located; at least a portion of the orthographic projection of the second sub-part 120b along the thickness direction X is located within the region where the second light-emitting element 1112 is located; and at least a portion of the orthographic projection of the third sub-part 120c along the thickness direction X is located within the region where the third light-emitting element 1113 is located. The distance between two adjacent protrusions 1211 in the first sub-part 120a is d1, the distance between two adjacent protrusions 1211 in the second sub-part 120b is d2, and the distance between two adjacent protrusions 1211 in the third sub-part 120c is d3, where d1 > d2 > d3.

[0098] At least a portion of the orthographic projection of the first sub-part 120a along the thickness direction X lies within the region where the first light-emitting element 1111 is located. That is, the orthographic projection of the first sub-part 120a along the thickness direction X can cover the region where the first light-emitting element 1111 is located, or is located within the region where the first light-emitting element 1111 is located. Similarly, the orthographic projection of the second sub-part 120b along the thickness direction X can cover the region where the second light-emitting element 1112 is located, or is located within the region where the second light-emitting element 1112 is located; the orthographic projection of the third sub-part 120c along the thickness direction X can cover the region where the third light-emitting element 1113 is located, or is located within the region where the third light-emitting element 1113 is located.

[0099] Since the wavelength of red light is longer than that of green and blue light, and the wavelength of green light is longer than that of blue light, the spacing d1 between two adjacent protrusions 1211 in the first sub-part 120a is set to be greater than the spacing d2 between two adjacent protrusions 1211 in the second sub-part 120b, and the spacing d2 between two adjacent protrusions 1211 in the second sub-part 120b is greater than the spacing d3 between two adjacent protrusions 1211 in the third sub-part 120c. In this way, by controlling the proportion of red, green, and blue light reflected from the ambient light in different sub-parts, the reflected color can be adjusted, so that the screen can present a better integrated black effect.

[0100] Understandably, the specific values ​​of d1, d2, and d3 can be set based on the magnitude and propagation characteristics of the red, green, and blue light wavelengths.

[0101] In some embodiments, the material of the first sublayer 121 includes at least one of silicon dioxide, titanium dioxide, zirconium dioxide, aluminum oxide, zinc oxide, magnesium oxide, silicon nitride, aluminum nitride, zinc sulfide, magnesium difluoride, calcium difluoride, sodium fluoride, barium difluoride, lithium fluoride, and gallium boride.

[0102] Optionally, the material of the first sublayer 121 may include any one, two, or more of silicon dioxide, titanium dioxide, zirconium dioxide, aluminum oxide, zinc oxide, magnesium oxide, silicon nitride, aluminum nitride, zinc sulfide, magnesium difluoride, calcium difluoride, sodium fluoride, barium difluoride, lithium fluoride, and gallium boride. Silicon dioxide, titanium dioxide, zirconium dioxide, aluminum oxide, zinc oxide, magnesium oxide, silicon nitride, aluminum nitride, zinc sulfide, magnesium difluoride, calcium difluoride, sodium fluoride, barium difluoride, lithium fluoride, and gallium boride all have high refractive indices.

[0103] The first sublayer 121 can be formed using processes such as CVD (Chemical Vapor Deposition), PVD (Physical Vapor Deposition), and ALD (Atomic Layer Deposition).

[0104] This configuration helps ensure that the first sub-layer 121 has a high refractive index to satisfy n1-n2≥0.1, which in turn helps ensure the light emission efficiency of the display panel 100.

[0105] In some embodiments, the first sublayer 121 includes an organic material and nanoparticles, wherein the nanoparticles are filled in the organic material, and the organic material is made of at least one of polyimide, epoxy resin, and acrylic resin. The nanoparticles are made of at least one of silicon dioxide, titanium dioxide, zirconium dioxide, aluminum oxide, zinc oxide, magnesium oxide, silicon nitride, aluminum nitride, zinc sulfide, magnesium difluoride, calcium difluoride, sodium fluoride, barium difluoride, lithium fluoride, and gallium boride.

[0106] Understandably, organic materials such as polyimide, epoxy resin, and acrylic resin have good flexibility, which facilitates the stretching or folding function of the display panel 100.

[0107] Organic materials can be prepared and shaped through spin coating, top coating process, inkjet printing or nanoimprinting.

[0108] Nanoparticles are nanoscale particulate objects. The nanoparticles are filled in organic matter, and the materials of the nanoparticles include at least one of silicon dioxide, titanium dioxide, zirconium dioxide, aluminum oxide, zinc oxide, magnesium oxide, silicon nitride, aluminum nitride, zinc sulfide, magnesium difluoride, calcium difluoride, sodium fluoride, barium difluoride, lithium fluoride, and gallium boride, which helps to ensure that the first sublayer 121 has a correspondingly high refractive index.

[0109] Therefore, by including organic matter and nanoparticles in the first sublayer 121, it is beneficial to maintain the refractive index of the first sublayer 121 while making the first sublayer 121 more flexible, which facilitates the bending or folding function of the display panel 100.

[0110] In some embodiments, the material of the second sublayer 122 includes at least one of polyimide, epoxy resin, and acrylic resin.

[0111] Optionally, the material of the second sublayer 122 may include any one, two, or more of polyimide, epoxy resin, and acrylic resin.

[0112] The second sublayer 122 can be prepared by spin coating, top coating process, inkjet printing or nanoimprinting.

[0113] The material of the second sublayer 122 includes at least one of polyimide, epoxy resin, and acrylic resin, which is conducive to ensuring the refractive index of the second sublayer 122 and to ensuring that the relationship between the refractive index n1 of the first sublayer 121 and the refractive index n2 of the second sublayer 122 satisfies: n1-n2≥0.1.

[0114] In some embodiments, the transmittance T of the second sublayer 122 satisfies: 50% ≤ T ≤ 95%.

[0115] Optionally, the transmittance T of the second sublayer 122 can be 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, or 95%, etc.

[0116] It is understandable that the higher the transmittance of the second sub-layer 122, the more conducive it is to the light emitted by the light-emitting element 111 to the light-emitting surface. On the other hand, the lower the transmittance of the second sub-layer 122, the better its blocking effect on ambient light, and the more conducive it is to reducing the interference of ambient light reflection in the display panel 100 on the normal display of the display panel 100.

[0117] Therefore, setting the transmittance T of the second sub-layer 122 to satisfy 50% ≤ T ≤ 95% can achieve a balance between improving the light emission efficiency of the light-emitting element 111 and reducing the reflection of ambient light by the display panel. This is beneficial to reduce the interference of ambient light on the normal display of the display panel 100 while ensuring that the display panel 100 has a certain light emission efficiency, thereby improving the display effect.

[0118] In some embodiments, the transmittance T of the second sublayer 122 satisfies: 60% ≤ T ≤ 70%.

[0119] Optionally, the transmittance T of the second sublayer 122 can be 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, or 70%, etc.

[0120] It is understandable that the higher the transmittance of the second sub-layer 122, the more conducive it is to the light emitted by the light-emitting element 111 to the light-emitting surface. On the other hand, the lower the transmittance of the second sub-layer 122, the more conducive it is to reducing the interference caused by the reflection of ambient light in the display functional layer 110 on the light emission of the light-emitting element 111. Therefore, setting 60%≤T≤70% can achieve a balance between improving the light emission efficiency of the light-emitting element 111 and reducing the reflection of ambient light by the display panel. This is beneficial to reduce the interference of ambient light on the normal display of the display panel 100 while ensuring that the display panel 100 has a certain light emission efficiency, thereby improving the display effect.

[0121] like Figure 1 and Figure 6 As shown, in some embodiments, the display panel 100 further includes an encapsulation layer 140 and a cover plate 130. The encapsulation layer 140 is disposed between the display functional layer 110 and the anti-reflection functional layer 120, and the anti-reflection functional layer 120 is disposed between the encapsulation layer 140 and the cover plate 130.

[0122] The encapsulation layer 140 can prevent external water, oxygen, etc. from entering the display function layer 120 of the display panel 100, and the cover plate 130 has a certain sealing effect on the display panel.

[0123] In some embodiments, the encapsulation layer 140 includes an encapsulation sublayer 141, a first sublayer 121 located between the encapsulation sublayer 141 and a second sublayer 122, and the first sublayer 121 and the encapsulation sublayer 141 are integrally formed.

[0124] The first sublayer 121 and the encapsulation sublayer 141 are integrally formed. The first sublayer 121 and the encapsulation sublayer 141 can be made of the same material and formed by a one-time processing process such as deposition. A protrusion 1211 is formed on the first sublayer 121 by etching or other processes.

[0125] With this configuration, the first sub-layer 121 and the encapsulation sub-layer 141 are integrally formed and completed through a single-layer manufacturing process, which helps to simplify the manufacturing process of the display panel 100 and improve the manufacturing efficiency of the display panel 100.

[0126] like Figures 1 to 6 As shown, in some embodiments, the display function layer 110 further includes a pixel definition layer 112, which has pixel openings and light-emitting elements 111 are disposed within the pixel openings. The pixel definition layer 112 can insulate the light-emitting elements 111 from each other. The pixel definition layer 112 includes a black material.

[0127] The pixel definition layer 112 can be made of an insulating material to achieve mutual insulation between two adjacent light-emitting elements 111 and reduce crosstalk between adjacent light-emitting elements 111.

[0128] When the pixel definition layer 112 is set to black, at least some of the ambient light will be absorbed by the pixel definition layer 112 after it is illuminated by ambient light. This helps to further reduce the ambient light reflected by the display panel 100 and further reduce the interference of ambient light on the normal display of the display panel 100.

[0129] like Figure 7 As shown, the display device 10 provided according to the embodiments of this application includes the display panel 100 provided in any of the above embodiments.

[0130] The display device 10 provided in this application embodiment has the same technical effect as the display panel 100 provided in any of the above embodiments of this application, and will not be described again here.

[0131] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display panel, characterized in that, include: The display functional layer includes light-emitting elements; An anti-reflection functional layer is disposed on the side of the display functional layer near the light-emitting surface of the display panel along the thickness direction. The anti-reflection functional layer includes a first sub-layer and a second sub-layer stacked along the thickness direction. The first sub-layer is at least partially embedded in the second sub-layer. The first sub-layer and the second sub-layer have different refractive indices. At least a portion of the cross-section of the anti-reflection functional layer parallel to the light-emitting surface includes a first cross-section corresponding to the first sub-layer and a second cross-section corresponding to the second sub-layer. The ratio of the area occupied by the first cross-section to the area occupied by the second cross-section varies along the thickness direction. The ratio of the area occupied by the first section to the area occupied by the second section in the cross section changes continuously along the thickness direction; The first sublayer includes multiple protrusions, and the second sublayer includes multiple grooves, wherein the protrusions and grooves engage with each other. The light-emitting elements include a first light-emitting element for emitting red light, a second light-emitting element for emitting green light, and a third light-emitting element for emitting blue light. The anti-reflection functional layer includes a first sub-section, a second sub-section, and a third sub-section. At least a portion of the orthographic projection of the first sub-section along the thickness direction is located within the region where the first light-emitting element is located. At least a portion of the orthographic projection of the second sub-section along the thickness direction is located within the region where the second light-emitting element is located. At least a portion of the orthographic projection of the third sub-section along the thickness direction is located within the region where the third light-emitting element is located. The distance between two adjacent protrusions in the first sub-section is d1, the distance between two adjacent protrusions in the second sub-section is d2, and the distance between two adjacent protrusions in the third sub-section is d3, where d1 > d2 > d3.

2. The display panel according to claim 1, characterized in that, Along the direction close to the light-emitting surface, the ratio of the area occupied by the first cross section to the area occupied by the second cross section gradually decreases.

3. The display panel according to claim 1, characterized in that, The refractive index of the first sublayer is greater than that of the second sublayer.

4. The display panel according to claim 3, characterized in that, The refractive index n1 of the first sublayer and the refractive index n2 of the second sublayer satisfy: n1-n2≥0.

1.

5. The display panel according to claim 4, characterized in that, 1.7≤n1≤2.2。 6. The display panel according to claim 4, characterized in that, 1.2≤n2≤1.7。 7. The display panel according to claim 1, characterized in that, The thickness of the anti-reflection functional layer does not exceed 5 μm.

8. The display panel according to claim 1, characterized in that, The first sublayer includes a plurality of protrusions, and the second sublayer includes a plurality of grooves, wherein the protrusions and the grooves cooperate with each other.

9. The display panel according to claim 8, characterized in that, From the first sub-layer to the second sub-layer, the protrusion gradually decreases in cross-section perpendicular to the thickness direction.

10. The display panel according to claim 8, characterized in that, The protrusions are conical, frustum-shaped (smaller at the top and larger at the bottom), truncated square (smaller at the top and larger at the bottom), pyramidal, semi-ellipsoidal, or pyramidal.

11. The display panel according to claim 8, characterized in that, Along the direction perpendicular to the thickness direction, the distance w between two adjacent protrusions satisfies: 100nm ≤ w ≤ 2000nm.

12. The display panel according to claim 8, characterized in that, Along the thickness direction, the size h of the protrusion satisfies: 200nm ≤ h ≤ 3000nm.

13. The display panel according to claim 1, characterized in that, The material of the first sublayer includes at least one of silicon dioxide, titanium dioxide, zirconium dioxide, aluminum oxide, zinc oxide, magnesium oxide, silicon nitride, aluminum nitride, zinc sulfide, magnesium difluoride, calcium difluoride, sodium fluoride, barium difluoride, lithium fluoride, and gallium boride; and / or, The material of the second sublayer includes at least one of polyimide, epoxy resin, and acrylic resin.

14. The display panel according to claim 1, characterized in that, The display panel further includes an encapsulation layer and a cover plate. The encapsulation layer is disposed between the display functional layer and the anti-reflection functional layer, and the anti-reflection functional layer is disposed between the encapsulation layer and the cover plate.

15. The display panel according to claim 14, characterized in that, The encapsulation layer includes an encapsulation sublayer, the first sublayer being located between the encapsulation sublayer and the second sublayer, and the first sublayer and the encapsulation sublayer being integrally formed.

16. The display panel according to claim 1, characterized in that, The display panel further includes a pixel definition layer, which has pixel openings, and the light-emitting element is disposed within the pixel openings. The pixel definition layer includes a black material.

17. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 16.

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