Display panel and display device

Abstract

This application discloses a display panel and display device, relating to the field of display technology, which can improve the light extraction efficiency of the display panel without changing the light-emitting material. The display panel includes: a substrate layer; a plurality of pixel structures disposed on one side of the substrate layer; a light extraction layer disposed on the side of the pixel structures near the light-emitting side of the display panel; the side of the light extraction layer near the pixel structures has a plurality of alternately arranged first recessed structures and first protruding structures, the recessed apex of the first recessed structure being away from the pixel structure, and the protruding apex of the first protruding structure being close to the pixel structure; the plurality of first recessed structures include at least two recess depths, the recess depth being the dimension of the first recessed structure in the thickness direction of the display panel, and at least two adjacent first recessed structures having different recess depths.

Description

Technical Field

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

[0002] Currently, with the continuous development of display technology, OLED (Organic Light-Emitting Diode) and QLED (Quantum Dot Light-Emitting Diodes), due to their self-emissive characteristics, are increasingly widely used in various display devices such as mobile phones, tablets, computers, and televisions. Light extraction efficiency is typically improved by optimizing the luminescent materials; however, current research on luminescent materials has reached a bottleneck, limiting the potential for further improvements in luminous efficiency. Therefore, how to improve the light extraction efficiency of light-emitting devices without changing the luminescent materials has become an urgent technical problem to be solved. Summary of the Invention

[0003] This application provides a display panel and display device that can improve the light extraction efficiency of the display panel without changing the light-emitting material.

[0004] A first aspect of this application provides a display panel, including:

[0005] Substrate layer;

[0006] Multiple pixel structures are disposed on one side of the substrate layer;

[0007] A light extraction layer is disposed on the side of the pixel structure near the light-emitting side of the display panel;

[0008] The light extraction layer has a plurality of alternating first recessed structures and first protruding structures on the side near the pixel structure, wherein the recessed apex of the first recessed structure is away from the pixel structure, and the protruding apex of the first protruding structure is close to the pixel structure.

[0009] The plurality of first recessed structures include at least two recessed depths, the recessed depth being the dimension of the first recessed structure in the thickness direction of the display panel, and the recessed depths of at least two adjacent first recessed structures are different.

[0010] In some embodiments, the pixel structure includes a light-emitting device;

[0011] The display panel also includes:

[0012] A driving backplane is disposed between the substrate layer and the light-emitting device. The driving backplane includes a pixel driving circuit, which is electrically connected to the light-emitting device.

[0013] The light extraction layer includes a planarization layer and / or a filter layer.

[0014] In some embodiments, the display panel further includes:

[0015] A reflective layer is disposed on the side of the light-emitting device away from the driving backplate;

[0016] The light extraction layer is disposed between the driving backplate and the light-emitting device;

[0017] The light-emitting side is the side of the substrate layer away from the light-emitting device.

[0018] In some embodiments, the light-emitting device includes a first electrode, a light-emitting layer, and a second electrode, wherein the first electrode is electrically connected to the pixel driving circuit, and the light-emitting layer is disposed between the first electrode and the second electrode;

[0019] In the case where the light extraction layer includes the planar layer, the first recessed structure and the first protruding structure are disposed on the side of the planar layer near the light-emitting device;

[0020] The first electrode is connected to the planarization layer, and the shape of the first electrode matches the shape of the surface of the planarization layer near the first electrode. The shape of the light-emitting layer near the first electrode matches the shape of the first electrode.

[0021] In some embodiments, when the light extraction layer includes the filter layer, a planarization layer is provided between the filter layer and the light-emitting device, and the first recessed structure and the first protruding structure are provided on the side of the filter layer near the planarization layer;

[0022] The shape of the surface of the planar layer near the filter layer matches the shape of the surface of the filter layer near the planar layer.

[0023] In some embodiments, the light extraction layer is disposed on the side of the light-emitting device away from the driving backplate;

[0024] The light-emitting side is the side of the light-emitting device that is away from the substrate layer.

[0025] In some embodiments, the light extraction layer has a plurality of alternately arranged second recessed structures and second protruding structures on the side away from the pixel structure, wherein the shape of the second recessed structure matches the shape of the first protruding structure, and the shape of the second protruding structure matches the shape of the first recessed structure.

[0026] In some embodiments, the orthographic projection of the second recessed structure on the substrate layer overlaps the orthographic projection of the first protruding structure on the substrate layer, and the orthographic projection of the second protruding structure on the substrate layer overlaps the orthographic projection of the first recessed structure on the substrate layer.

[0027] In some embodiments, the first recess structures with at least two recess depths are arranged alternately; and / or,

[0028] At least two of the first recessed structures have different projected areas on the substrate.

[0029] In some embodiments, the plurality of first protrusion structures include at least two protrusion heights, the protrusion height being the dimension of the first protrusion structure in the thickness direction of the display panel, and the first protrusion structures with at least two protrusion heights are arranged alternately; and / or,

[0030] At least two adjacent first recessed structures have different projected areas on the substrate.

[0031] In some embodiments, the distance between two adjacent first recess structures with different recess depths ranges from 1.2 μm to 2.1 μm; and / or,

[0032] The distance between two adjacent first recess structures of the same depth ranges from 3.4 μm to 5.5 μm; and / or,

[0033] At least one of the depression depths ranges from 1 μm to 2 μm; and / or,

[0034] The ratio of at least two of the said indentation depths is in the range of 1 / 3 to 3 / 4; and / or,

[0035] The angle between the line connecting adjacent protruding vertices and recessed vertices and the thickness direction of the display panel ranges from 45° to 60°; and / or,

[0036] At least one of the recessed surfaces of the first recessed structure corresponding to the recessed depth includes an arcuate surface or a bent surface; and / or,

[0037] At least one of the first protrusion structures corresponding to the protrusion height includes a tip protrusion; and / or,

[0038] The orthographic projection shape of the first recessed structure on the substrate layer includes a circle, an ellipse, or a polygon.

[0039] In some embodiments, the orthographic projection of each pixel structure onto the substrate layer overlaps at least two orthographic projections of the first recessed structures onto the substrate layer.

[0040] A second aspect of this application provides a display device, comprising:

[0041] The display panel as described in the first aspect.

[0042] The display panel provided in this application embodiment has a light extraction layer disposed on the side of the pixel structure near the light-emitting side of the display panel, which is also the display side. The side of the light extraction layer near the pixel structure has multiple alternating first recessed structures and first protruding structures. The apex of the first recessed structure is far from the pixel structure, while the apex of the first protruding structure is close to the pixel structure. The multiple first recessed structures include at least two recess depths, where the recess depth is the dimension of the first recessed structure in the thickness direction of the display panel. Therefore, the protrusions of the light extraction layer are equivalent to facing the display side. Light emitted from the pixel structure passes through the light extraction layer and exits the display panel. The light extraction layer acts as a convex lens, which has a focusing effect on light. The light extraction layer disposed on the light-emitting side of the display panel can increase the amount of light emitted from the display panel at a direct viewing angle, focusing light emitted from a wider viewing angle towards a more direct viewing direction, thus improving the utilization rate of light emitted from a wider viewing angle and ultimately improving the light extraction efficiency of the display panel. Furthermore, by setting a first recess structure with at least two recess depths, the curvature of the lens surface through which the light exits can be varied, further improving the light-gathering effect and increasing the light extraction efficiency. This improved light extraction efficiency can further reduce driving power consumption under the same display conditions. Attached Figure Description

[0043] Figure 1 A schematic partial structural diagram of a display panel provided in an embodiment of this application;

[0044] Figure 2 A schematic partial structural diagram of another display panel provided as an example of this application;

[0045] Figure 3 A schematic partial structural diagram of yet another display panel provided as an example of this application;

[0046] Figure 4 A schematic partial structural diagram of another display panel provided as an example of this application;

[0047] Figure 5 A schematic partial arrangement diagram of a first recessed structure of a display panel provided in an embodiment of this application;

[0048] Figure 6 A schematic partial structural diagram of a display panel provided in an embodiment of this application;

[0049] Figure 7A schematic partial structural diagram of another display panel provided in an embodiment of this application;

[0050] Figure 8 A schematic partial structural diagram of another display panel provided in an embodiment of this application;

[0051] Figure 9 A schematic partial structural diagram of another display panel provided in an embodiment of this application;

[0052] Figure 10 A schematic partial structural diagram of a display panel provided in an embodiment of this application;

[0053] Figure 11 A schematic partial structural diagram of another display panel provided in an embodiment of this application;

[0054] Figure 12 This is a schematic structural diagram of a display device provided in an embodiment of this application. Detailed Implementation

[0055] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0056] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0057] Currently, with the continuous development of display technology, OLEDs and QLEDs, due to their self-emissive characteristics, are being increasingly widely used in various display devices such as mobile phones, tablets, computers, and televisions. Light extraction efficiency is typically improved by optimizing the luminescent materials; however, current research on luminescent materials has reached a bottleneck, limiting the potential for further improvements in luminous efficiency. Therefore, how to improve the light extraction efficiency of light-emitting devices without altering the luminescent materials has become a pressing technical problem to be solved.

[0058] This application provides a display panel and display device that can improve the light extraction efficiency of the display panel without changing the light-emitting material.

[0059] A first aspect of this application provides a display panel. Figure 1 This is a schematic partial structural diagram of a display panel provided in an embodiment of this application. Figure 1 As shown, the display panel includes: a substrate layer 100, multiple pixel structures 200, and a light extraction layer 300. The pixel structures 200 are disposed on one side of the substrate layer 100. The light extraction layer 300 is disposed on the side of the pixel structures 200 near the light-emitting side D of the display panel, which is also the display side. The side of the light extraction layer 300 near the pixel structures 200 has multiple alternating first recessed structures 310 and first protruding structures 320. The recessed apex 311 of the first recessed structure 310 is away from the pixel structure 200, and the protruding apex of the first protruding structure 320 is away from the pixel structure 200. Point 321 is close to pixel structure 200; it should be noted that the proximity and distance of the protruding vertex 321 and the concave vertex 311 relative to pixel structure 200 are relative. The protruding vertex 321 is closer to pixel structure 200 relative to concave vertex 311, and the concave vertex 311 is farther away from pixel structure 200 relative to protruding vertex 321; the plurality of first concave structures 310 include at least two concave depths, the concave depth being the dimension of the first concave structure 310 in the thickness direction H of the display panel, and only at least two adjacent first concave structures 310 have different concave depths.

[0060] For example, such as Figure 1 As shown, the recessed depth of the first recessed structure 310 includes a first recessed depth h1 and a second recessed depth h2, where h1 > h2. The two types of first recessed structures 310 corresponding to the first recessed depth h1 and the second recessed depth h2 are arranged alternately, and a second recessed depth h2 is provided between adjacent first recessed depths h1. Figure 1 The first recessed structure 310 with two recessed depths is only shown schematically. There may be a first recessed structure 310 with more than two recessed depths. This application does not make a specific limitation.

[0061] For example, the orthographic projection area of ​​the first recessed structure 310 on the substrate layer 100 can be different for different recess depths. For instance, the orthographic projection areas of two adjacent first recessed structures 310 on the substrate layer 100 can be different. The orthographic projection shape of the first recessed structure 310 on the substrate layer 100 can include a circle, an ellipse, or a polygon. The polygon can be a regular polygon or an irregular polygon; this application embodiment does not specifically limit the shape.

[0062] For example, such as Figure 1 As shown, pixel structure 200 includes a red pixel structure R, a green pixel structure G, and a blue pixel structure B, enabling the display of a color image. Pixel structure 200 may include a light-emitting device to emit light.

[0063] For example, such as Figure 1 As shown, the light-emitting side D is located on the side where the substrate layer 100 is located. Figure 1 The display panel shown is a bottom-emitting type display panel. In the process of manufacturing the display panel, the light extraction layer 300 is prepared first, and then the pixel structure 200 is prepared. The shape of the surface of the light extraction layer 300 near the pixel structure 200 forms a first recessed structure 310 and a first protruding structure 320. The shape of the surface of the pixel structure 200 near the light extraction layer 300 matches the shape of the light extraction layer 300.

[0064] For example, Figure 2 A schematic partial structural diagram of another display panel provided as an example in this application. (See diagram below.) Figure 2 As shown, the light-emitting side D is located on the opposite side of the substrate layer 100, that is, the light-emitting side D and the substrate layer 100 are on different sides. Figure 2 The display panel shown is a top-emitting type display panel. For example... Figure 2 As shown, the apex 311 of the first recessed structure 310 is closer to the light-emitting side D, while the apex 321 of the first protruding structure 320 is farther from the light-emitting side D. Therefore... Figure 2 The lens structure on the light extraction layer 300 shown is actually formed by the cross-section of the pixel structure 200 and the light extraction layer 300. In the process of manufacturing the display panel, the pixel structure 200 is manufactured first, and then the light extraction layer 300 is manufactured. The shape of the lens structure is determined by the concavity and convexity of the pixel structure 200. Therefore, the shape of the light extraction layer 300 is obtained by matching the shape of the contact surface of the pixel structure 200.

[0065] It should be noted that improving the light extraction efficiency of a display panel typically involves either increasing the luminous efficiency of the light-emitting material or improving the structure of the light-emitting device. However, current research on light-emitting materials has reached a bottleneck, making it difficult to significantly improve the light extraction efficiency of display panels.

[0066] To address the aforementioned issues, the display panel provided in this application embodiment includes a light extraction layer 300 disposed on the side of the pixel structure 200 near the light-emitting side D of the display panel, which is also the display side. The side of the light extraction layer 300 near the pixel structure 200 has multiple alternating first recessed structures 310 and first protruding structures 320. The recessed apex 311 of the first recessed structure 310 is away from the pixel structure 200, and the protruding apex 321 of the first protruding structure 320 is close to the pixel structure 200. The multiple first recessed structures 310 include at least two recessed depths, and the recessed depth is the dimension of the first recessed structure 310 in the thickness direction H of the display panel. Therefore, with the protrusion of the light extraction layer 300 facing the display side, light emitted from the pixel structure 200 passes through the light extraction layer 300 and exits the display panel. The light extraction layer 300 then acts as a convex lens, which has a focusing effect on light. The light extraction layer 300, located on the light-emitting side D of the display panel, increases the amount of light emitted from the display panel at the frontal viewing angle, focusing light emitted from a wider viewing angle towards the frontal viewing direction, thus improving the utilization rate of light emitted from a wider viewing angle and consequently improving the light extraction efficiency of the display panel. Furthermore, by providing a first recessed structure 310 with at least two recess depths, the curvature of the lens surface through which the light passes can be varied, further enhancing the light-gathering effect and improving the light extraction efficiency. This improved light extraction efficiency can further reduce driving power consumption under the same display conditions.

[0067] In some embodiments, at least two different depths of the first recessed structures 310 are alternately arranged. (See reference...) Figure 1 and Figure 2 The first recessed structures 310 with two different recessed depths are arranged alternately, that is, the first recessed structure 310 corresponding to the first recessed depth h1 and the first recessed structure 310 corresponding to the second recessed depth h2 are arranged alternately. The lenses with different curvatures are matched with each other, which can further improve the light focusing effect and improve the light extraction efficiency of the display panel.

[0068] In some embodiments, the orthographic projection of each pixel structure 200 onto the substrate layer 100 overlaps the orthographic projections of at least two first recessed structures 310 onto the substrate layer 100. That is, each pixel structure 200 corresponds to at least two first recessed structures 310, so each pixel structure 200 can correspond to multiple lens-like light-gathering structures, resulting in a higher uniformity of the improvement in light extraction efficiency. In addition, with a large number of first recessed structures 310, the size of each first recessed structure 310 is small, and the overall thickness of the light extraction layer 300 will not be too thick, which is beneficial for the thinning design of the display panel.

[0069] In some embodiments, the recessed surface of the first recessed structure 310 corresponding to at least one recessed depth includes an arcuate surface. For example, see reference... Figure 1 and Figure 2 The concave surface of the first concave structure 310 is an arc-shaped curved surface, such as a hemispherical curved surface.

[0070] For example, Figure 3 A schematic partial structural diagram of another display panel provided as an example of this application. For example... Figure 3 As shown, the recessed surface of the first recessed structure 310 with a smaller recessed depth is an arc-shaped curved surface, while the recessed surface of the first recessed structure 310 with a larger recessed depth is a bent surface. The recessed vertices of the first recessed structure 310 include a first recessed vertex 301 and a second recessed vertex 302. The end corresponding to the first recessed vertex 301 is a rounded end, and the end corresponding to the second recessed vertex 302 is a pointed end.

[0071] For example, Figure 4 A schematic partial structural diagram of another display panel provided as an example of this application. For example... Figure 4 As shown, the end face corresponding to the second recess vertex 302 of the first recess structure 310 with a smaller recess depth is an inclined plane.

[0072] It should be noted that the recessed surface of the first recessed structure 310 can also be irregular in shape, or the end face corresponding to the second recessed vertex 302 can be irregular in shape. It can be set according to the actual process capability or light-gathering effect. This application embodiment does not make specific limitations.

[0073] For example, such as Figures 1 to 4 As shown, the end corresponding to the first protrusion vertex 321 can be a tip, that is, the first protrusion structure 320 includes a tip protrusion structure.

[0074] For example, Figure 5 This is a schematic partial arrangement diagram of a first recessed structure of a display panel provided in an embodiment of this application. For example... Figure 5 As shown, first recessed structures 310 of different sizes are arranged alternately in a matrix, and first protruding structures 320 are located between adjacent first recessed structures 310. Each pixel structure 200 corresponds to multiple first recessed structures 310 and multiple first protruding structures 320. It should be noted that... Figure 5 The edge shapes of the first recessed structure 310 and the first protruding structure 320 shown are hexagonal, which are only schematic. The arrangement and number of the first recessed structures 310 are also schematic and are not intended to limit the specific embodiments of this application.

[0075] In some embodiments, the plurality of first protrusion structures 320 include at least two protrusion heights, the protrusion height being the dimension of the first protrusion structure 320 in the thickness direction H of the display panel, and the first protrusion structures 320 with at least two protrusion heights are arranged alternately.

[0076] For example, refer to Figure 1 If the protrusion height of the first protrusion structure 320 is the same as the concavity depth of the adjacent first concavity structure 310, then the alternating high and low first protrusion structure 320 corresponds to the first concavity structure 310 with a lower depth.

[0077] In some implementations... Figure 6 This is a schematic partial structural diagram of a display panel provided in an embodiment of this application. Figure 6 As shown, the light extraction layer 300 has a plurality of alternately arranged second recessed structures 330 and second protruding structures 340 on the side away from the pixel structure 200. The shape of the second recessed structure 330 matches the shape of the first protruding structure 320, and the shape of the second protruding structure 340 matches the shape of the first recessed structure 310. That is, the recessed apex of the second recessed structure 330 is close to the pixel structure 200, and the protruding apex of the second protruding structure 340 is away from the pixel structure 200. The shapes of the second recessed structure 330 and the second protruding structure 340 on the side of the light extraction layer 300 near the light-emitting side D can be formed based on the shape of the film layer between the light extraction layer 300 and the substrate layer 100.

[0078] For example, refer to Figure 6 The orthographic projection of the second recessed structure 330 on the substrate 100 covers the orthographic projection of the first protruding structure 320 on the substrate 100, and the orthographic projection of the second protruding structure 340 on the substrate 100 covers the orthographic projection of the first recessed structure 310 on the substrate 100.

[0079] In some implementations... Figure 7 This is a schematic partial structural diagram of another display panel provided in an embodiment of this application. (See diagram below.) Figure 7 As shown, the distance between two adjacent first depression structures 310 with different depression depths ranges from 1.2μm to 2.1μm, that is, the value range of the first distance L1 is from 1.2μm to 2.1μm.

[0080] In some implementations, reference Figure 7 The distance between two adjacent first depression structures 310 with the same depression depth ranges from 3.4 μm to 5.5 μm, that is, the value range of the second distance L2 is from 3.4 μm to 5.5 μm.

[0081] For example, refer to Figure 7 The angle between the line connecting adjacent raised and recessed vertices and the thickness direction H of the display panel ranges from 45° to 60°; that is, the value of the included angle α can range from 45° to 60°.

[0082] For example, refer to Figure 7 The end face of the protrusion vertex of the first protrusion structure 320 is a plane.

[0083] For example, at least one depression depth ranges from 1 μm to 2 μm. For example, refer to Figure 1 The first indentation depth h1 ranges from 1 μm to 2 μm, or the second indentation depth h2 ranges from 1 μm to 2 μm.

[0084] For example, the ratio of at least two indentation depths is in the range of 1 / 3 to 3 / 4; that is, the value of h1 / h2 can be in the range of 1 / 3 to 3 / 4, for example, it can be 1 / 2.

[0085] It should be noted that the larger the total area of ​​the recessed and raised slopes of the light extraction layer 300, the more beneficial it is for the light to be emitted from the front viewing angle of the display. The more similar the structure and width of the recessed and raised structures of the light extraction layer 300, the larger the effective light extraction area. Alternatively, the recessed structure can be smaller in size and more densely arranged than the raised structure, which can increase the effective area of ​​the light extraction layer, thereby increasing the amount of light emitted, improving the light emission efficiency, and enhancing the display effect. The increase in display brightness can reduce the driving power consumption under the same display conditions.

[0086] In some embodiments, the pixel structure 200 includes a light-emitting device; the light-emitting device includes a first electrode, a light-emitting layer, and a second electrode, with the light-emitting layer located between the first and second electrodes. The display panel also includes a driving backplane and a reflective layer. The driving backplane is disposed between the substrate layer 100 and the light-emitting device. The driving backplane includes a pixel driving circuit, which is electrically connected to the light-emitting device. The driving circuit includes a driving transistor, with the first electrode electrically connected to the driving transistor. The light extraction layer 300 includes a planarization layer and / or a filter layer. For example, the first electrode may be the anode of the light-emitting device, and the second electrode may be the cathode of the light-emitting device.

[0087] For example, Figure 8 This is a schematic partial structural diagram of another display panel provided in an embodiment of this application. For example... Figure 8 As shown, the first electrode 350 is electrically connected to the driving transistor TFT. An encapsulation layer 400 is disposed on the side of the second electrode 360 ​​away from the substrate layer 100. A reflective layer 500 is disposed on the side of the light-emitting device away from the driving backplane BP, i.e., the reflective layer 500 is disposed on the side of the encapsulation layer 400 away from the substrate layer 100. A light extraction layer 300 is disposed between the driving backplane BP and the light-emitting device, i.e., the light extraction layer 300 is located between the driving backplane BP and the first electrode 350. The light-emitting side D is the side of the substrate layer 100 away from the light-emitting device. Figure 8The display panel shown is a bottom-emitting type. The light-emitting layer includes a red light-emitting layer r1, a green light-emitting layer g1, and a blue light-emitting layer b1. A filter layer is disposed between the driving backplate BP and the light extraction layer 300, corresponding to the colors of the light-emitting layers. This filter layer includes a red filter layer r2, a green filter layer g2, and a blue filter layer b2. Light emitted from the light-emitting layer is reflected by the reflective layer 500 and emitted from the light-emitting side D for image display.

[0088] refer to Figure 8 The planarization layer 303 can serve as the light extraction layer 300, and can be used to planarize the uneven film layers of the driving backplane (BP) and the filter layer. A first recessed structure 310 and a first raised structure 320 are disposed on the side of the planarization layer 303 near the first electrode 350; the first electrode 350 is connected to the planarization layer 303, and the shape of the first electrode 350 matches the shape of the surface of the planarization layer 303 near the first electrode 350. The shape of the light-emitting layer on the side near the first electrode 350 matches the shape of the first electrode 350. It should be noted that the planarization layer 303 may include organic materials.

[0089] In some implementations... Figure 9 This is a schematic partial structural diagram of another display panel provided in an embodiment of this application. (See attached diagram.) Figure 9 As shown, the light extraction layer 300 includes a filter layer 600 and a planarization layer 303. The filter layer 600 includes a red filter layer r2, a green filter layer g2, and a blue filter layer b2. The shape of the surface of the filter layer 600 near the planarization layer 303 matches the shapes of the first recessed structure 310 and the first protruding structure 320. For example, the recess depth of the first recessed structure 310 can be greater than the depth of the recessed structure matching it on the filter layer 600, and the protrusion height of the first protruding structure 320 can be greater than the height of the protruding structure matching it on the filter layer 600.

[0090] In some implementations... Figure 10 This is a schematic partial structural diagram of a display panel provided in an embodiment of this application. Figure 10 As shown, the light extraction layer 300 only includes the filter layer 600, that is, the filter layer 600 serves as the light extraction layer 300. The first recessed structure 310 and the first protruding structure 320 are disposed on the side of the filter layer 600 near the planarization layer 303. The shape of the surface of the planarization layer 303 near the filter layer 600 matches the shape of the surface of the filter layer 600 near the planarization layer 303.

[0091] In some implementations... Figure 11 This is a schematic partial structural diagram of another display panel provided in an embodiment of this application. (See diagram below.) Figure 11As shown, the light extraction layer 300 is disposed on the side of the light-emitting device away from the driving backplane BP. The light extraction layer 300 can also be disposed on the side of the encapsulation layer 400 away from the driving backplane BP. For example, the light extraction layer 300 can be an organic material. The light-emitting side D is the side of the light-emitting device away from the substrate layer 100, i.e. Figure 11 The display panel shown is a top-emitting type display panel, where the light emitted from the light-emitting layer can be directly emitted from the side where the second electrode 360 ​​is located.

[0092] A second aspect of this application provides a display device. Figure 12 This is a schematic structural diagram of a display device provided in an embodiment of this application. Figure 12 As shown, the display device includes a display panel 1000 as described in the first aspect.

[0093] It should be noted that the display device provided in this application embodiment can be applied to scenarios such as vehicle display, smartphone, computer, medical monitor, television, smart wearable display, etc., and this application embodiment does not make specific limitations.

[0094] The display device provided in this application embodiment includes a light extraction layer 300 disposed within a display panel 1000. The light extraction layer 300 is disposed on the side of the pixel structure 200 near the light-emitting side D of the display panel, which is also the display side. The side of the light extraction layer 300 near the pixel structure 200 has a plurality of alternately arranged first recessed structures 310 and first protruding structures 320. The recessed apex 311 of the first recessed structure 310 is away from the pixel structure 200, and the protruding apex 321 of the first protruding structure 320 is close to the pixel structure 200. The plurality of first recessed structures 310 include at least two recessed depths, and the recessed depth is the dimension of the first recessed structure 310 in the thickness direction H of the display panel. Therefore, with the protrusion of the light extraction layer 300 facing the display side, light emitted from the pixel structure 200 passes through the light extraction layer 300 and exits the display panel. The light extraction layer 300 then acts as a convex lens, which has a focusing effect on light. The light extraction layer 300, located on the light-emitting side D of the display panel, can increase the amount of light emitted from the display panel at the frontal viewing angle, focusing light emitted from a wider viewing angle towards the frontal viewing direction, improving the utilization rate of light emitted from a wider viewing angle, and thus improving the light extraction efficiency of the display panel. Furthermore, by providing a first recessed structure 310 with at least two recess depths, the curvature of the lens surface through which the light passes can be varied, further improving the light-gathering effect and light extraction efficiency, and further reducing driving power consumption under the same display conditions.

[0095] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0096] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0097] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0098] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0099] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A display panel, characterized in that, include: Substrate layer; Multiple pixel structures are disposed on one side of the substrate layer; A light extraction layer is disposed on the side of the pixel structure near the light-emitting side of the display panel; The light extraction layer has a plurality of alternating first recessed structures and first protruding structures on the side near the pixel structure, wherein the recessed apex of the first recessed structure is away from the pixel structure, and the protruding apex of the first protruding structure is close to the pixel structure. The plurality of first recessed structures include at least two recessed depths, the recessed depth being the dimension of the first recessed structure in the thickness direction of the display panel, and the recessed depths of at least two adjacent first recessed structures are different; The pixel structure includes a light-emitting device; The display panel also includes: A driving backplane is disposed between the substrate layer and the light-emitting device. The driving backplane includes a pixel driving circuit, which is electrically connected to the light-emitting device. The light extraction layer includes a planarization layer and / or a filter layer; A reflective layer is disposed on the side of the light-emitting device away from the driving backplate; The light extraction layer is disposed between the driving backplate and the light-emitting device; The light-emitting side is the side of the substrate layer away from the light-emitting device; The light-emitting device includes a first electrode, a light-emitting layer, and a second electrode. The first electrode is electrically connected to the pixel driving circuit, and the light-emitting layer is disposed between the first electrode and the second electrode. In the case where the light extraction layer includes the planarization layer, the first recessed structure and the first protruding structure are disposed on the side of the planarization layer near the light-emitting device; the first electrode is connected to the planarization layer, the shape of the first electrode matches the shape of the surface of the planarization layer near the first electrode, and the shape of the light-emitting layer near the first electrode matches the shape of the first electrode. And / or, When the light extraction layer includes the filter layer, a planarization layer is provided between the filter layer and the light-emitting device. The first recessed structure and the first protruding structure are provided on the side of the filter layer near the planarization layer. The shape of the surface of the planarization layer near the filter layer matches the shape of the surface of the filter layer near the planarization layer. The recess depth of the first recessed structure is greater than the depth of the recessed structure matching it on the filter layer, and the protrusion height of the first protruding structure can be greater than the height of the protruding structure matching it on the filter layer.

2. The display panel according to claim 1, characterized in that, The light extraction layer has a plurality of alternately arranged second recessed structures and second protruding structures on the side away from the pixel structure. The shape of the second recessed structure matches the shape of the first protruding structure, and the shape of the second protruding structure matches the shape of the first recessed structure.

3. The display panel according to claim 2, characterized in that, The orthographic projection of the second recessed structure on the substrate layer covers the orthographic projection of the first protruding structure on the substrate layer, and the orthographic projection of the second protruding structure on the substrate layer covers the orthographic projection of the first recessed structure on the substrate layer.

4. The display panel according to claim 1, characterized in that, The first recess structures of at least two recess depths are arranged alternately; and / or, At least two of the first recessed structures have different projected areas on the substrate.

5. The display panel according to claim 1, characterized in that, The plurality of first protrusion structures include at least two protrusion heights, the protrusion height being the dimension of the first protrusion structure in the thickness direction of the display panel, and the first protrusion structures with at least two protrusion heights are arranged alternately; and / or, At least two adjacent first recessed structures have different projected areas on the substrate.

6. The display panel according to claim 5, characterized in that, The distance between two adjacent first recess structures with different recess depths ranges from 1.2 μm to 2.1 μm; and / or, The distance between two adjacent first recess structures of the same depth ranges from 3.4 μm to 5.5 μm; and / or, At least one of the depression depths ranges from 1 μm to 2 μm; and / or, The ratio of at least two of the said indentation depths is in the range of 1 / 3 to 3 / 4; and / or, The angle between the line connecting adjacent protruding vertices and recessed vertices and the thickness direction of the display panel ranges from 45° to 60°; and / or, At least one of the recessed surfaces of the first recessed structure corresponding to the recessed depth includes an arcuate surface or a bent surface; and / or, At least one of the first protrusion structures corresponding to the protrusion height includes a tip protrusion; and / or, The orthographic projection shape of the first recessed structure on the substrate layer includes a circle, an ellipse, or a polygon.

7. The display panel according to claim 1, characterized in that, The orthographic projection of each pixel structure onto the substrate layer covers at least two orthographic projections of the first recessed structures onto the substrate layer.

8. A display device, characterized in that, include: The display panel as described in any one of claims 1-7.

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