Display panel, display device

Abstract

A display panel and a display device, relating to the field of display technology, comprising a light-emitting substrate (100); the light-emitting substrate (100) comprising a plurality of light-emitting devices (3) arranged in an array; a first light extraction layer (7), located at least on the light-emitting side of a portion of the light-emitting devices (3), comprising a plurality of prisms (71) extending along a first direction (OB) and arranged along a second direction (OA); a second light extraction layer (9), located on the light-emitting side of the light-emitting device (3) and on a side of the first light extraction layer (7) away from the light-emitting substrate (100), comprising a plurality of convex lenses (91) arranged in an array; wherein the orthographic projection of the first light extraction layer (7) on the light-emitting substrate (100) is located within the orthographic projection of the second light extraction layer (9) on the light-emitting substrate (100), and the maximum size (W) of the prism (71) along the second direction (OA) is less than or equal to the maximum size (D) of the convex lens (91) along the second direction (OA); and the first direction (OB) and the second direction (OA) intersect. The display panel can improve the problem of large viewing angle aberration and can increase the light output intensity of the display panel at a normal viewing angle.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] OLED, also known as Organic Light Emitting Diode, stimulates electrons in luminescent materials by electric injection, and uses the electrons in the luminescent materials to return to the ground state to emit light. Compared with other display devices, OLED has higher contrast, wider color gamut, short response time, and can be ultra-thin and flexible. However, OLED display products have low light output efficiency and a significant large viewing angle difference problem. Summary of the invention

[0003] The embodiments of the present application adopt the following technical solutions:

[0004] In a first aspect, an embodiment of the present application provides a display panel, including:

[0005] A light-emitting substrate, the light-emitting substrate comprising a plurality of light-emitting devices arranged in an array;

[0006] A first light extraction layer, located at least on a light emitting side of a portion of the light emitting device, comprising a plurality of prisms extending along a first direction and arranged along a second direction;

[0007] A second light extraction layer, located at the light emitting side of the light emitting device and at a side of the first light extraction layer away from the light emitting substrate, comprising a plurality of convex lenses arranged in an array;

[0008] The orthographic projection of the first light extraction layer on the light-emitting substrate is within the orthographic projection of the second light extraction layer on the light-emitting substrate, and the maximum size of the prism along the second direction is less than or equal to the maximum size of the convex lens along the second direction; the first direction and the second direction intersect.

[0009] In some embodiments of the present application, in the second direction, along the second direction, the spacing between every two adjacent prisms is greater than or equal to the spacing between every two adjacent convex lenses.

[0010] In some embodiments of the present application, for the first light extraction layer and the second light extraction layer located on the light emitting side of the same light emitting device, the outer contour of the orthographic projection of the first light extraction layer on the light emitting substrate is located within the outer contour of the orthographic projection of the second light extraction layer on the light emitting substrate.

[0011] In some embodiments of the present application, for the first light extraction layer and the second light extraction layer located on the light emitting side of the same light emitting device, the outer contour of the orthographic projection of the first light extraction layer on the light emitting substrate is located within the outer contour of the orthographic projection of the first graphic on the light emitting substrate;

[0012] The first figure is a closed figure formed by sequentially connecting the focal points of a plurality of the convex lenses located on the outermost side of the second light extraction layer.

[0013] In some embodiments of the present application, the display panel further includes a color resist layer, and the color resist layer is located on a side of the second light extraction layer away from the light emitting substrate;

[0014] The outer contour of the orthographic projection of the second light extraction layer on the light-emitting substrate is located within the outer contour of the orthographic projection of the color resist layer on the light-emitting substrate.

[0015] In some embodiments of the present application, the display panel further includes a color resist layer, and the color resist layer is located on a side of the second light extraction layer away from the light emitting substrate;

[0016] The orthographic projection of the second light extraction layer on the light-emitting substrate partially overlaps with the orthographic projection of the color resist layer on the light-emitting substrate, and the outer contour of the orthographic projection of the first graphic on the light-emitting substrate is located within the outer contour of the orthographic projection of the color resist layer on the light-emitting substrate.

[0017] In some embodiments of the present application, the display panel includes a substrate, a color conversion layer and a color resistance layer, the color conversion layer is located between part of the light-emitting device and the first light extraction layer, and the color resistance layer is located on a side of the second light extraction layer away from the light-emitting substrate;

[0018] The orthographic projection of the color conversion layer on the substrate at least covers a portion of the orthographic projection of the light-emitting device on the substrate, and the orthographic projection of the color-resist layer on the substrate overlaps with the orthographic projection of the color conversion layer on the substrate.

[0019] In some embodiments of the present application, the light-emitting device includes a first light-emitting device, a second light-emitting device, and a third light-emitting device; the color conversion layer includes a first color conversion pattern located on a light-emitting side of the first light-emitting device and a second color conversion pattern located on a light-emitting side of the second light-emitting device; the display panel further includes a light-transmitting pattern located on a light-emitting side of the third light-emitting device, and the light-transmitting pattern is arranged on the same layer as the color conversion layer;

[0020] The first light emitting device, the second light emitting device and the third light emitting device emit the same light color, and the light passing through the first color conversion pattern, the light passing through the second color conversion pattern and the light passing through the light-transmitting pattern have different colors.

[0021] In some embodiments of the present application, the first color conversion pattern and the second color conversion pattern respectively include quantum dots, and the light-transmitting pattern includes scattering particles.

[0022] In some embodiments of the present application, an orthographic projection of a row of the convex lenses on the light-emitting substrate overlaps with an orthographic projection of at least one of the prisms on the light-emitting substrate.

[0023] In some embodiments of the present application, along the second direction, the number of the prisms included in the first light extraction layer is greater than or equal to the number of the convex lenses included in the second light extraction layer.

[0024] In some embodiments of the present application, the first light extraction layer includes first prisms and second prisms that are spaced apart;

[0025] The first prism and the second prism have the same maximum size along the second direction, and the height of the first prism along the direction perpendicular to the light-emitting substrate is greater than or equal to the height of the second prism along the direction perpendicular to the light-emitting substrate.

[0026] In some embodiments of the present application, the second light extraction layer includes a first convex lens and a second convex lens spaced apart along the second direction;

[0027] The first convex lens and the second convex lens have the same maximum size along the second direction, and a height of the first convex lens along a direction perpendicular to the light-emitting substrate is greater than or equal to a height of the second convex lens along a direction perpendicular to the light-emitting substrate.

[0028] In some embodiments of the present application, along the second direction, the number of the prisms included in the first light extraction layer is equal to the number of the convex lenses included in the second light extraction layer;

[0029] The orthographic projection of the first convex lens on the light-emitting substrate overlaps with the orthographic projection of the first prism on the light-emitting substrate, and the orthographic projection of the second convex lens on the light-emitting substrate overlaps with the orthographic projection of the second prism on the light-emitting substrate.

[0030] In some embodiments of the present application, along the second direction, the number of the prisms included in the first light extraction layer is greater than the number of the convex lenses included in the second light extraction layer.

[0031] In some embodiments of the present application, the orthographic projection of a row of convex lenses on the light-emitting substrate overlaps with the orthographic projection of two prisms on the light-emitting substrate, and the orthographic projection of a line connecting the focal points of a row of convex lenses on the light-emitting substrate is located between the orthographic projections of the two prisms on the light-emitting substrate.

[0032] In some embodiments of the present application, the first light extraction layer includes a middle area and edge areas located on both sides of the middle area, wherein the height of each prism in the first light extraction layer in a direction perpendicular to the light-emitting substrate gradually decreases along the third direction;

[0033] The third direction is a direction from the edge area to the middle area, or the third direction is a direction from the middle area to the edge area.

[0034] In some embodiments of the present application, the second light extraction layer includes a central area and a peripheral area surrounding the central area, and the height of each convex lens in the second light extraction layer in a direction perpendicular to the light-emitting substrate gradually decreases along a fourth direction;

[0035] The fourth direction is a direction from the peripheral area to the central area, or the fourth direction is a direction from the central area to the peripheral area.

[0036] In some embodiments of the present application, the first light extraction layer includes a middle area and edge areas located on both sides of the middle area, and the height of each prism in the first light extraction layer in a direction perpendicular to the light-emitting substrate gradually decreases along the direction from the middle area to the edge area;

[0037] The second light extraction layer includes a central area and a peripheral area surrounding the central area, and the height of each convex lens in the second light extraction layer in a direction perpendicular to the light-emitting substrate gradually increases along the direction from the central area to the peripheral area.

[0038] In some embodiments of the present application, the display panel further includes a first covering layer and a second covering layer, wherein the first covering layer at least covers the first light extraction layer, and the second covering layer covers the second light extraction layer;

[0039] The refractive index of the first light extraction layer is greater than the refractive index of the first covering layer, and the refractive index of the second light extraction layer is greater than the refractive index of the second covering layer.

[0040] In some embodiments of the present application, the refractive index of the first covering layer is greater than the refractive index of the second light extraction layer.

[0041] In a second aspect, an embodiment of the present application provides a display device, comprising the display panel as described above.

[0042] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments or descriptions of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0044] Figure 1 A schematic diagram of the structure of a display panel provided in an embodiment of the present application;

[0045] Figure 2 A schematic structural diagram of a first light extraction layer provided in an embodiment of the present application;

[0046] Figure 3 A schematic structural diagram of a second light extraction layer provided in an embodiment of the present application;

[0047] Figure 6 A schematic diagram of the projection relationship between a first light extraction layer and a second light extraction layer provided in an embodiment of the present application;

[0048] Figure 4 , Figure 5 , Figure 7-Figure 20 Sixteen structural schematic diagrams of display panels provided in the embodiments of the present application;

[0049] Fig.21 A light intensity attenuation curve of a display panel provided in an embodiment of the present application before and after the first light extraction layer is provided;

[0050] Fig. 22 A light intensity attenuation curve of a display panel provided in an embodiment of the present application before and after the first light extraction layer and the second light extraction layer are provided;

[0051] Fig.23 A light intensity attenuation curve of light of different colors emitted from a color conversion pattern and a light-transmitting pattern before a first light extraction layer and a second light extraction layer are provided in an embodiment of the present application;

[0052] Fig.24A light intensity attenuation curve of light of different colors emitted from a color conversion pattern and a light-transmitting pattern after a first light extraction layer and a second light extraction layer are provided in an embodiment of the present application;

[0053] Fig.25 An embodiment of the present application provides a display panel before and after the first light extraction layer and the second light extraction layer are provided, and the trajectory of the white point coordinates of the display panel changing with the viewing angle in a color gamut diagram. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0055] In the drawings, the thickness of regions and layers may be exaggerated for clarity. The same reference numerals in the drawings represent the same or similar structures, and thus their detailed descriptions will be omitted. In addition, the drawings are only schematic illustrations of the present application and are not necessarily drawn to scale.

[0056] Unless the context requires otherwise, throughout the specification and claims, the term "including" is to be interpreted as an open, inclusive meaning, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" and the like are intended to indicate that specific features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present application. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0057] In the embodiments of the present application, words such as "first" and "second" are used to indicate parts of identical or similar items having substantially the same functions and effects. This is only for the purpose of clearly describing the technical solutions of the embodiments of the present application and shall not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0058] The embodiment of the present application provides a display panel, Figure 1 , Figure 2 and Figure 3 As shown, including:

[0059] The light-emitting substrate 100 includes a plurality of light-emitting devices 3 arranged in an array;

[0060] The first light extraction layer 7 is at least located on the light emitting side of a portion of the light emitting device 3 and includes a plurality of prisms 71 extending along the first direction OB and arranged along the second direction OA;

[0061] The second light extraction layer 9 is located at the light emitting side of the light emitting device 3 and at the side of the first light extraction layer 7 away from the light emitting substrate 100, and includes a plurality of convex lenses 91 arranged in an array;

[0062] Among them, the orthographic projection of the first light extraction layer 7 on the light-emitting substrate 100 is located within the orthographic projection of the second light extraction layer 10 on the light-emitting substrate 100, and the maximum dimension W of the prism 71 along the second direction OA is less than or equal to the maximum dimension of the convex lens 91 along the second direction OA; the first direction OB and the second direction OA intersect.

[0063] The specific structure of the light emitting substrate 100 is not limited here and can be determined according to actual conditions.

[0064] The above-mentioned multiple first light extraction layers 7 are located at least on the light output side of some light-emitting devices 3, which means that the first light extraction layer 7 is arranged on the light output side of some light-emitting devices 3; or, the first light extraction layer 7 is arranged on the light output side of all light-emitting devices 3.

[0065] The light emitting device may include a first light emitting device 31, a second light emitting device 32, and a third light emitting device 33; in some embodiments, the light emitting colors of the first light emitting device 31, the second light emitting device 32, and the third light emitting device 33 may be the same. In some embodiments, the light emitting colors of the first light emitting device 31, the second light emitting device 32, and the third light emitting device 33 may be different. The embodiments of the present application are described by taking the light emitting colors of the first light emitting device 31, the second light emitting device 32, and the third light emitting device 33 as the same.

[0066] The situations in which the first light extraction layer 7 is arranged on the light output side of some light-emitting devices include but are not limited to: in the first situation, the first light extraction layer 7 is respectively arranged on the light output sides of the first light-emitting device 31 and the second light-emitting device 32, and the first light extraction layer 7 is not arranged on the light output side of the third light-emitting device 33; in the second situation, the first light extraction layer 7 is respectively arranged on the light output sides of the first light-emitting device 31 and the third light-emitting device 33, and the first light extraction layer 7 is not arranged on the light output side of the second light-emitting device 32; in the third situation, the first light extraction layer 7 is respectively arranged on the light output sides of the second light-emitting device 32 and the third light-emitting device 33, and the first light extraction layer 7 is not arranged on the light output side of the first light-emitting device 31; in the fourth situation, the first light extraction layer 7 is arranged on the light output sides of a part of the first light-emitting devices 31, a part of the second light-emitting devices 32, and a part of the third light-emitting devices 33, and the first light extraction layer 7 is not arranged on the light output side of another part of the first light-emitting devices 31, another part of the second light-emitting devices 32, and another part of the third light-emitting devices 33.

[0067] Here, the corresponding relationship between a prism 71 in the first light extraction layer 7 and a convex lens 91 in the second light extraction layer 9 is not limited, and can be determined according to actual conditions.

[0068] In an exemplary embodiment, one prism 71 corresponds to a row of convex lenses 91 arranged along the first direction OB. It can be understood that, at this time, the orthographic projection of one prism 71 on the light-emitting substrate 100 overlaps with the orthographic projection of a row of convex lenses 91 arranged along the first direction OB on the light-emitting substrate 100.

[0069] In an exemplary embodiment, one prism 71 corresponds to two rows of convex lenses 91 arranged along the first direction OB. It can be understood that, at this time, the orthographic projection of one prism 71 on the light-emitting substrate 100 overlaps with the orthographic projection of the two rows of convex lenses 91 arranged along the first direction OB on the light-emitting substrate 100.

[0070] In an exemplary embodiment, the situation in which the orthographic projection of the first light extraction layer 7 on the light-emitting substrate 100 is located within the orthographic projection of the second light extraction layer 10 on the light-emitting substrate includes but is not limited to: the outer contour of the orthographic projection of the first light extraction layer 7 on the light-emitting substrate 100 is located within the outer contour of the orthographic projection of the second light extraction layer 10 on the light-emitting substrate 100; or, the outer contour of the orthographic projection of the first light extraction layer 7 on the light-emitting substrate 100 overlaps with the outer contour of the orthographic projection of the second light extraction layer 10 on the light-emitting substrate 100.

[0071] In an exemplary embodiment, when the maximum size W of the prism 71 along the second direction OA is equal to the maximum size D of the convex lens 91 along the second direction OA, one prism 71 may correspond to a row of convex lenses 91 arranged along the first direction OB. When the maximum size W of the prism 71 along the second direction OA is smaller than the maximum size D of the convex lens 91 along the second direction OA, one prism 71 may correspond to multiple rows of convex lenses 91 arranged along the first direction OB.

[0072] Exemplarily, the maximum dimension W of the prism 71 along the second direction OA is in a range of 6 μm-40 μm.

[0073] Exemplarily, the height of the prism 71 along the direction perpendicular to the light emitting substrate 100 ranges from 4 μm to 27 μm.

[0074] Exemplarily, the maximum dimension D of the convex lens 91 along the second direction OA is in the range of 6 μm-50 μm.

[0075] Exemplarily, the ratio of the height of the convex lens 91 along the direction perpendicular to the light-emitting substrate 100 to the maximum dimension D of the convex lens 91 along the second direction OA is in the range of 0.1:1 to 1.5:1.

[0076] For example: the height of the convex lens 91 along the direction perpendicular to the light-emitting substrate 100 is 5 μm, and the maximum dimension D of the convex lens 91 along the second direction OA is 50 μm; or, the height of the convex lens 91 along the direction perpendicular to the light-emitting substrate 100 is 0.6 μm, and the maximum dimension D of the convex lens 91 along the second direction OA is 6 μm; or, the height of the convex lens 91 along the direction perpendicular to the light-emitting substrate 100 is 9 μm, and the maximum dimension D of the convex lens 91 along the second direction OA is 6 μm.

[0077] Here, the spacing between every two adjacent prisms 71 in the first light extraction layer 7 along the second direction OA is not limited and can be specifically determined according to the actual product situation.

[0078] Exemplarily, the distance between every two adjacent prisms 71 along the second direction OA ranges from 0.5 μm to 5 μm.

[0079] Here, there is no limitation on the distance between each two adjacent convex lenses 91 in the second light extraction layer 9, and the distance can be determined according to the actual product situation.

[0080] Exemplarily, the spacing dimension between each two adjacent prisms 71 along the second direction OA can be set to be greater than or equal to the spacing dimension between each two adjacent convex lenses 91 arranged along the second direction OA in the second light extraction layer 9. In this way, more light emitted from the prism 71 in the first light extraction layer 7 and light emitted from the area between two adjacent prisms 71 can enter the convex lens 91 of the second light extraction layer 9. The convex lens 91 can better converge the light, thereby improving the light extraction efficiency of the display panel and reducing energy consumption.

[0081] In an exemplary embodiment, the orthographic projection shape of the prism 71 on the light-emitting substrate 100 is a quadrilateral, and the cross-sectional shape of the prism 71 along a direction perpendicular to the light-emitting substrate 100 is a triangle.

[0082] In an exemplary embodiment, the positive projection shape of the convex lens 91 on the light-emitting substrate 100 is a circle, an ellipse, a regular hexagon or other regular polygon, and the cross-sectional shape of the convex lens 91 along the direction perpendicular to the light-emitting substrate 100 is a semicircle, a semi-ellipse or a fan.

[0083] Here, the angle between the first direction OB and the second direction OA is not limited. For example, the angle between the first direction OB and the second direction OA may be a right angle, that is, the first direction OB is perpendicular to the second direction OA.

[0084] In an exemplary embodiment, the light-emitting substrate 100 includes a substrate 1 and a plurality of light-emitting devices 3 located on the substrate 1. For the light-emitting device 3 having a first light extraction layer 7 provided on the light-emitting side, the orthographic projection of the first light extraction layer 7 on the substrate 1 at least partially covers the orthographic projection of the light-emitting device 3 on the substrate 1.

[0085] Exemplarily, the orthographic projection of the first light extraction layer 7 on the substrate 1 partially covers the orthographic projection of the light-emitting device 3 on the substrate 1; or, the outer contour of the orthographic projection of the first light extraction layer 7 on the substrate 1 overlaps with the outer contour of the orthographic projection of the light-emitting device 3 on the substrate 1; or, the orthographic projection of the first light extraction layer 7 on the substrate 1 covers the orthographic projection of the light-emitting device 3 on the substrate 1, and the first light extraction layer 7 also extends to the area between two adjacent light-emitting devices 3.

[0086] The specific type of the display panel is not limited here.

[0087] In some embodiments, the display panel may be an OLED (Organic Light-Emitting Diode) display panel, a Mini-LED display panel, or a Micro-LED display panel. The embodiments of the present application are described by taking the display panel as an OLED display panel as an example.

[0088] In the display panel provided in the embodiment of the present application, a first light extraction layer 7 is provided on the light emitting side of at least part of the light emitting device 3, and the first light extraction layer 7 includes a plurality of prisms 71 extending along the first direction and arranged along the second direction. The prisms 71 can refract the light emitted from the light emitting substrate 100, and adjust the light intensity of each sub-pixel in the display panel at different viewing angles, thereby improving the large viewing angle difference of the display panel. Then, a second light extraction layer 9 is provided, and the second light extraction layer 9 includes a plurality of convex lenses 91 arranged in an array, and the plurality of convex lenses 91 arranged in an array can work together with the plurality of prisms 71. On the one hand, since the prisms 71 extend along the first direction OB and are arranged along the second direction OA, a difference in the intensity of the light in the first direction OB and the second direction OA in the display panel may be caused. The convex lenses 91 can improve the difference in the intensity of the light in the first direction OB and the second direction OA in the display panel; on the other hand, the convex lenses 91 can have a good convergence effect on the optical light emitted from the first light extraction layer 7 and between two adjacent prisms 71 in the first light extraction layer 7, thereby improving the overall light intensity of the display panel and improving the display effect. In addition, the maximum dimension W of the prism 71 along the second direction OA is less than or equal to the maximum dimension W of the convex lens 91 along the second direction OA, which can allow as much light as possible that passes through the prism 71 and is refracted to enter the convex lens 91, further improving the focusing effect of the convex lens 91 and further improving the light extraction efficiency.

[0089] In some embodiments of the present application, in the second direction OA, the distance between every two adjacent prisms 71 is greater than or equal to the distance between every two adjacent convex lenses 91 .

[0090] In an exemplary embodiment, the spacing between each two adjacent prisms 71 along the second direction OA can be set to zero, and the spacing between each two adjacent convex lenses 91 arranged along the second direction OA can also be set to zero. At this time, the spacing between each two adjacent prisms 71 along the second direction OA is equal to the spacing between each two adjacent convex lenses 91 arranged along the second direction OA in the second light extraction layer 9.

[0091] It should be noted that in the drawings of the present application, the spacing between every two adjacent prisms 71 along the second direction OA is zero, and the spacing between every two adjacent convex lenses 91 arranged along the second direction OA is also zero.

[0092] In the embodiment provided in the present application, the spacing dimension between each two adjacent prisms 71 along the second direction OA is set to be greater than or equal to the spacing dimension between each two adjacent convex lenses 91 arranged along the second direction OA in the second light extraction layer 9. In this way, more light emitted from the prism 71 in the first light extraction layer 7 and light emitted from the area between the two adjacent prisms 71 can enter the convex lens 91 of the second light extraction layer 9, thereby further improving the focusing effect of the convex lens 91 and further improving the light extraction efficiency.

[0093] In some embodiments of the present application, reference Figure 4 As shown, for the first light extraction layer 7 and the second light extraction layer 9 located on the light emitting side of the same light emitting device 3, the outer contour S1 of the orthographic projection of the first light extraction layer 7 on the light emitting substrate 100 is located within the outer contour S2 of the orthographic projection of the second light extraction layer 9 on the light emitting substrate 100.

[0094] In the display panel provided in the embodiment of the present application, since the prism 71 can refract the light emitted from the light-emitting substrate 100, it can adjust the light intensity of each sub-pixel in the display panel at different viewing angles while also scattering the light. By setting the outer contour S1 of the orthographic projection of the first light extraction layer 7 on the light-emitting substrate 100 to be within the outer contour S2 of the orthographic projection of the second light extraction layer 9 on the light-emitting substrate 100, as much light scattered by the first light extraction layer 7 as possible is emitted into the second light extraction layer 9, which has a convergence effect on the light, thereby improving the light output intensity at the positive viewing angle, improving the light output efficiency, and reducing the power consumption of the display panel.

[0095] In some embodiments of the present application, Figure 5 and Figure 6 As shown, for the first light extraction layer 7 (including multiple prisms 71) and the second light extraction layer 9 (including multiple convex lenses 91) located on the light emitting side of the same light emitting device 3, the outer contour of the orthographic projection of the first light extraction layer 7 on the light emitting substrate 100 is located within the outer contour of the orthographic projection of the first figure F1F2F3F4 on the light emitting substrate 100; the first figure F1F2F3F4 is a closed figure formed by connecting the focal points of a circle of convex lenses 91 in the outer side of the second light extraction layer 9 in sequence.

[0096] In an embodiment of the present application, the outer contour of the orthographic projection of the first light extraction layer 7 on the light-emitting substrate 100 is set to be within the outer contour of the orthographic projection of the first figure F1F2F3F4 on the light-emitting substrate 100; the first figure F1F2F3F4 is a closed figure formed by sequentially connecting the focal points of multiple convex lenses 91 located on the outermost side of the second light extraction layer 9; so that as much light scattered by the first light extraction layer 7 as possible is emitted into the second light extraction layer 9, which has a convergence effect on the light to a great extent, thereby improving the light output intensity at the positive viewing angle, improving the light output efficiency, and reducing the power consumption of the display panel.

[0097] In some embodiments of the present application, reference Figure 7 As shown, the display panel also includes a color resist layer 12, which includes a plurality of color resist patterns (for example, 121, 122 or 123) arranged in an array, and the color resist layer 12 is located on the side of the second light extraction layer 9 away from the light-emitting substrate 100; the outer contour S2 of the orthographic projection of the second light extraction layer 9 on the light-emitting substrate 100 is located within the outer contour S4 of the orthographic projection of the color resist layer 12 on the light-emitting substrate 100.

[0098] In some embodiments of the present application, reference Figure 8 As shown, the display panel also includes a color resist layer 12, the color resist layer 12 includes a plurality of color resist patterns (for example, 121, 122 or 123) arranged in an array, and the color resist layer 12 is located on the side of the second light extraction layer 9 away from the light-emitting substrate 100; the orthographic projection of the second light extraction layer 9 on the light-emitting substrate 100 and the orthographic projection S4 of the color resist layer 12 on the light-emitting substrate 100 partially overlap, and the outer contour of the orthographic projection S3 of the first figure F1F2F3F4 on the light-emitting substrate 100 is located within the outer contour of the orthographic projection S5 of the color resist layer 12 on the light-emitting substrate 100.

[0099] In an exemplary embodiment, reference Figure 1 As shown, the color resist layer 12 includes a first color resist pattern 121 , a second color resist pattern 122 and a third color resist pattern 123 , and the first color resist pattern 121 , the second color resist pattern 122 and the third color resist pattern 123 have different colors.

[0100] Exemplarily, the color of the first color resist pattern 121 is the same as the color of the light emitted from the first color conversion pattern 61 , the color of the second color resist pattern 122 is the same as the color of the light emitted from the second color conversion pattern 62 , and the color of the third color resist pattern 123 is the same as the color of the light emitted from the light-transmitting pattern 63 .

[0101] In some embodiments, a black matrix layer 11 may be disposed between every two adjacent color resist patterns to prevent color resist patterns of different colors from mixing.

[0102] In some embodiments, the superimposed color resist patterns may be used as a light shielding layer to prevent color resist patterns of different colors from mixing.

[0103] Exemplarily, the thickness of each color resist pattern along a direction perpendicular to the light emitting substrate 100 ranges from 5 μm to 25 μm.

[0104] The thicknesses of the color resist patterns of different colors may be the same, or the thicknesses of the color resist patterns of different colors may be different, which is not limited here.

[0105] In the display panel provided in the embodiment of the present application, by setting the outer contour S2 of the orthographic projection of the second light extraction layer 9 on the light-emitting substrate 100 to be located within the outer contour S4 of the orthographic projection of the color resist layer 12 on the light-emitting substrate 100; or, the outer contour of the orthographic projection S3 of the first figure F1F2F3F4 on the light-emitting substrate 100 is located within the outer contour of the orthographic projection S5 of the color resist layer 12 on the light-emitting substrate 100; it is possible to enable as much light as possible converged by the second light extraction layer 9 to be emitted from the color resist layer 12, thereby preventing the light from being blocked by the black matrix layer 11 between the color resist patterns, thereby improving the light output intensity and light output efficiency of the display panel and reducing power consumption.

[0106] In some embodiments of the present application, reference Figure 1 As shown, the display panel includes a substrate 1, a color conversion layer (including a first color conversion pattern 61 and a second color conversion pattern 62) and a color resist layer 12, the color conversion layer is located between part of the light-emitting device 3 and the first light extraction layer 7, and the color resist layer 12 is located on the side of the second light extraction layer 9 away from the light-emitting substrate 100; wherein, the orthographic projection of the color conversion layer (including the first color conversion pattern 61 and the second color conversion pattern 62) on the substrate 1 at least covers the orthographic projection of part of the light-emitting device 3 on the substrate 1, and the orthographic projection of the color resist layer 12 on the substrate 1 overlaps with the orthographic projection of the color conversion layer (including the first color conversion pattern 61 and the second color conversion pattern 62) on the substrate 1.

[0107] Exemplarily, the color conversion layer includes a first color conversion pattern 61 and a second color conversion pattern 62. For example, the first color conversion pattern 61 can be set as a red conversion pattern, and the second color conversion pattern 62 can be set as a green conversion pattern; for another example, the first color conversion pattern 61 can be set as a green conversion pattern, and the second color conversion pattern 62 can be set as a red conversion pattern.

[0108] Exemplarily, the light emitting device 3 includes a first light emitting device 31, a second light emitting device 32 and a third light emitting device 33; the color conversion layer includes a first color conversion pattern 61 located on the light emitting side of the first light emitting device 31 and a second color conversion pattern 62 located on the light emitting side of the second light emitting device 32; the display panel also includes a light-transmitting pattern 63 located on the light emitting side of the third light emitting device 33, and the light-transmitting pattern 63 is arranged on the same layer as the color conversion layer (including 61 and 62);

[0109] The first light emitting device 31 , the second light emitting device 32 and the third light emitting device 33 have the same light color, and the light after passing through the first color conversion pattern 61 , the light after passing through the second color conversion pattern 62 and the light after passing through the light-transmitting pattern 63 have different colors.

[0110] In some embodiments, a barrier layer 5 is disposed between any two adjacent ones of the first color conversion pattern 61 , the second color conversion pattern 62 and the light-transmitting pattern 63 .

[0111] For example, the material of the barrier layer 5 may include an organic material, wherein the material of the barrier layer 5 may be the same as that of the black matrix layer 11, or the material of the barrier layer 5 may be different from that of the black matrix layer 11, which may be determined according to actual conditions and is not limited here.

[0112] In some embodiments, the first light-emitting device 31, the second light-emitting device 32 and the third light-emitting device 33 have the same light-emitting color, and the light-emitting color is blue; the first color conversion pattern 61 can be set to a red conversion pattern, and the second color conversion pattern 62 can be set to a green conversion pattern; at this time, the color of the light emitted by the first light-emitting device 31 after passing through the first color conversion pattern 61 is red, and the color of the light emitted by the second light-emitting device 32 after passing through the second color conversion pattern 62 is green.

[0113] In an exemplary embodiment, a pixel definition layer 2 is disposed between any two of the first light emitting device 31 , the second light emitting device 32 and the third light emitting device 33 .

[0114] In an exemplary embodiment, reference Figure 1 As shown, the light-emitting substrate 100 includes a substrate 1 and light-emitting devices 3 located on the substrate 1, an encapsulation layer 4 covering each light-emitting device 3, a first color conversion pattern 61, a second color conversion pattern 62, a light-transmitting pattern 63, and a barrier layer 5 located between any two of the first color conversion pattern 61, the second color conversion pattern 62, and the light-transmitting pattern 63. The color resist layer 12 includes a first color resist pattern 121, a second color resist pattern 122, and a third color resist pattern 123.

[0115] Exemplarily, the display panel includes a plurality of sub-pixels arranged in an array, the sub-pixels include a first sub-pixel, a second sub-pixel and a third sub-pixel, wherein the first sub-pixel includes a first light-emitting device 31, a first color conversion pattern 62, a first color resist pattern 121, and a first light extraction layer 7 and a second light extraction layer 9 located between the first color conversion pattern 62 and the first color resist pattern 121; wherein the orthographic projection of the first light-emitting device 31 on the substrate 1 is located within the orthographic projection of the first color conversion pattern 62 on the substrate 1, and the orthographic projection of the first color conversion pattern 62 on the substrate 1 is located within the orthographic projection of the first color resist pattern 121 on the substrate 1. It can be understood that the orthographic projection area of ​​the first color conversion pattern 62 on the substrate 1 is greater than or equal to the orthographic projection area of ​​the first light-emitting device 31 on the substrate 1, and the orthographic projection area of ​​the first color resist pattern 121 on the substrate 1 is greater than or equal to the orthographic projection area of ​​the first color conversion pattern 62 on the substrate 1.

[0116] For example, the ratio between the orthographic projection area of ​​the first color resist pattern 121 on the substrate 1 and the orthographic projection area of ​​the first color conversion pattern 62 on the substrate 1 is in the range of 1:1 to 1.3:1.

[0117] Here, there is no limitation on whether the projection shapes of the first light emitting device 31 , the first color conversion pattern 62 , and the first color resist pattern 121 on the substrate 1 are the same, which can be determined according to actual conditions.

[0118] The second sub-pixel includes a second light-emitting device 32, a second color conversion pattern 62, a second color resist pattern 122, and a first light extraction layer 7 and a second light extraction layer 9 located between the second color conversion pattern 62 and the second color resist pattern 122; wherein, the orthographic projection of the second light-emitting device 32 on the substrate 1 is located within the orthographic projection of the second color conversion pattern 62 on the substrate 1, and the orthographic projection of the second color conversion pattern 62 on the substrate 1 is located within the orthographic projection of the second color resist pattern 122 on the substrate 1. It can be understood that the orthographic projection area of ​​the second color conversion pattern 62 on the substrate 1 is greater than or equal to the orthographic projection area of ​​the second light-emitting device 32 on the substrate 1, and the orthographic projection area of ​​the second color resist pattern 122 on the substrate 1 is greater than or equal to the orthographic projection area of ​​the second color conversion pattern 62 on the substrate 1.

[0119] For example, the ratio between the orthographic projection area of ​​the second color resist pattern 122 on the substrate 1 and the orthographic projection area of ​​the second color conversion pattern 62 on the substrate 1 is in the range of 1:1 to 1.3:1.

[0120] Here, whether the projection shapes of the second light emitting device 32 , the second color conversion pattern 62 , and the second color resist pattern 122 on the substrate 1 are the same is not limited and can be determined according to actual conditions.

[0121] The third sub-pixel includes a third light-emitting device 33, a light-transmitting pattern 63, a third color-resistance pattern 123, and a second light extraction layer 9 located between the light-transmitting pattern 63 and the third color-resistance pattern 123. The orthographic projection of the third light-emitting device 33 on the substrate 1 is located within the orthographic projection of the light-transmitting pattern 63 on the substrate 1, and the orthographic projection of the light-transmitting pattern 63 on the substrate 1 is located within the orthographic projection of the third color-resistance pattern 123 on the substrate 1. It can be understood that the orthographic projection area of ​​the light-transmitting pattern 63 on the substrate 1 is greater than or equal to the orthographic projection area of ​​the third light-emitting device 33 on the substrate 1, and the orthographic projection area of ​​the third color-resistance pattern 123 on the substrate 1 is greater than or equal to the orthographic projection area of ​​the light-transmitting pattern 63 on the substrate 1.

[0122] For example, the ratio between the orthographic projection area of ​​the third color resist pattern 123 on the substrate 1 and the orthographic projection area of ​​the light-transmitting pattern 63 on the substrate 1 is in the range of 1:1 to 1.3:1.

[0123] Here, whether the projection shapes of the third light emitting device 33 , the light-transmitting pattern 63 and the third color resist pattern 123 on the substrate 1 are the same is not limited and can be determined according to actual conditions.

[0124] In some embodiments of the present application, the first color conversion pattern 61 and the second color conversion pattern 62 include quantum dots, respectively, and the light-transmitting pattern 63 includes scattering particles.

[0125] Exemplarily, the scattering particles include titanium dioxide (TiO 2 ) particles or at least one of zirconium oxide (ZrO3) particles.

[0126] Exemplarily, the thickness of the first color conversion pattern 61 , the second color conversion pattern 62 , and the light-transmitting pattern 63 along a direction perpendicular to the substrate 1 ranges from 5 μm to 20 μm.

[0127] Exemplarily, the thicknesses of first color conversion pattern 61 , second color conversion pattern 62 , and light-transmitting pattern 63 along a direction perpendicular to substrate 1 are equal.

[0128] In some embodiments of the present application, reference Fig. 9 or Fig.10 As shown, the orthographic projection of a row of convex lenses 91 on the light-emitting substrate 100 overlaps with the orthographic projection of at least one prism 71 on the light-emitting substrate 100 .

[0129] In an exemplary embodiment, reference Fig. 9 As shown, the orthographic projections of a row of convex lenses 91 arranged along the first direction OB (row a1) overlap with the orthographic projections of one prism 71 on the light-emitting substrate 100; the orthographic projections of a row of convex lenses 91 arranged along the first direction OB (row a2) overlap with the orthographic projections of two prisms 71 on the light-emitting substrate 100.

[0130] In an exemplary embodiment, reference Fig.10 As shown, the orthographic projections of each row of convex lenses 91 arranged along the first direction OB on the light-emitting substrate 100 overlap with the orthographic projections of the two prisms 71 on the light-emitting substrate 100 . It can be understood that two prisms 71 correspond to one row of convex lenses 91 .

[0131] In an embodiment of the present application, a row of convex lenses 91 are arranged such that their orthographic projections on the light-emitting substrate 100 overlap with the orthographic projections of at least one prism 71 on the light-emitting substrate 100. In this way, the convex lenses 91 can gather as much light as possible emitted from the prism 71 and then emit the light through the color resist layer 12, thereby improving the light output efficiency of the display panel.

[0132] In some embodiments of the present application, reference Fig. 9 or Fig.10 As shown, along the second direction OA, the number of prisms 71 included in the first light extraction layer 7 is greater than or equal to the number of convex lenses 91 included in the second light extraction layer 9.

[0133] In some embodiments of the present application, reference Fig.11 As shown, the first light extraction layer 7 includes a first prism (unmarked) and a second prism (unmarked), and the first prism and the second prism are arranged at intervals; the maximum dimensions of the first prism and the second prism along the second direction OA are the same, and the height h1 of the first prism along the direction perpendicular to the light-emitting substrate 100 is greater than or equal to the height h2 of the second prism along the direction perpendicular to the light-emitting substrate 100.

[0134] In the display panel provided in the embodiment of the present application, since the prisms 71 extend along the first direction OB and are arranged along the second direction OA, the multiple prisms 71 may cause a large difference in light intensity between the first direction OB and the second direction OA in the display panel, and the display panel may have a sudden increase in light intensity at a large viewing angle in the second direction OA; in the embodiment of the present application, by setting the maximum size of each prism 71 along the second direction OA to be the same, the heights of each two adjacent prisms 71 along the direction perpendicular to the light-emitting substrate 100 are different, so that the slopes of the sides of each two adjacent prisms 71 are different, so that the refraction effects of the two adjacent prisms 71 on the light are different, which can improve the problem of a large difference in light intensity between the first direction OB and the second direction OA in the display panel to a certain extent, and improve the display effect. In addition, after the second light extraction layer 9 is set, the multiple convex lenses 91 can further improve the problem of the difference in light intensity between the first direction OB and the second direction OA in the display panel while converging the light and improving the brightness at the positive viewing angle, thereby further improving the display effect of the display panel.

[0135] In some embodiments of the present application, reference Fig.12 As shown, the second light extraction layer 9 includes a first convex lens (unmarked) and a second convex lens (unmarked). In the second direction OA, the first convex lens and the second convex lens are arranged alternately; the maximum dimensions of the first convex lens and the second convex lens along the second direction OA are the same, and the height h3 of the first convex lens along the direction perpendicular to the light-emitting substrate 100 is greater than or equal to the height h4 of the second convex lens along the direction perpendicular to the light-emitting substrate 100.

[0136] In some embodiments of the present application, reference Fig.13As shown, in the second direction OA, the number of prisms 71 included in the first light extraction layer 7 is equal to the number of convex lenses 91 included in the second light extraction layer 9; the orthographic projection of the first convex lens (higher height) on the light-emitting substrate 100 overlaps with the orthographic projection of the first prism (higher height) on the light-emitting substrate 100, and the orthographic projection of the second convex lens (lower height) on the light-emitting substrate 100 overlaps with the orthographic projection of the second prism (lower height) on the light-emitting substrate 100.

[0137] In an exemplary embodiment, when the maximum dimensions of the convex lenses 91 along the second direction OA are the same, the higher the height of the convex lenses 91, the stronger its light focusing ability. When the maximum dimensions of the prisms 71 along the second direction OA are the same, the higher the height of the prisms 71, the stronger its ability to refract light.

[0138] In an embodiment of the present application, the number of prisms 71 in the first light extraction layer 7 is set to be the same as the number of convex lenses 91 distributed along the second direction OA in the second light extraction layer 9, and the higher prisms 71 correspond to the higher convex lenses 91, and the lower prisms 71 correspond to the lower convex lenses 91. In this way, the prisms 71 with stronger light refraction ability correspond to the convex lenses 91 with stronger light focusing ability, and the prisms 71 with weaker light refraction ability correspond to the convex lenses 91 with weaker light focusing ability, so that as much light refracted by the prisms 71 as possible is gathered together by the convex lenses 91; on the one hand, the prisms 71 can refract the light emitted from the light-emitting substrate 100, adjust the light intensity of each sub-pixel in the display panel at different viewing angles, thereby improving the large viewing angle color difference problem of the display panel; on the other hand, the convex lenses 91 can improve the difference in light intensity in the first direction OB and the second direction OA in the display panel, and adjust the brightness attenuation difference of different color lights at a large viewing angle; it can also improve the focusing ability, improve the brightness of the display panel at a positive viewing angle, thereby improving the display effect of the display panel.

[0139] In some embodiments of the present application, reference Fig.14 As shown, along the second direction OA, the number of prisms 71 included in the first light extraction layer 7 is greater than the number of convex lenses 91 included in the second light extraction layer 9 .

[0140] Exemplarily, the number of prisms 71 included in the first light extraction layer 7 is N, and the number of convex lenses 91 included in the second light extraction layer 9 is N+1; or, the number of prisms 71 included in the first light extraction layer 7 is N, and the number of convex lenses 91 included in the second light extraction layer 9 is 2N; wherein N is a positive integer.

[0141] In some embodiments of the present application, reference Fig.14As shown, the orthographic projection of a row of convex lenses 91 on the light-emitting substrate 100 overlaps with the orthographic projection of two prisms 71 on the light-emitting substrate 100, and the orthographic projection of the line connecting the focal points of a row of convex lenses 91 on the light-emitting substrate 100 is located between the orthographic projections of the two prisms 71 on the light-emitting substrate 100.

[0142] In this way, in the two prisms 71 corresponding to a row of convex lenses 91, part of the light refracted by the left prism 71 is incident from the right side of the convex lens 91, and part of the light refracted by the right prism 71 is incident from the left side of the convex lens 91, and the optical light emitted from the area between the two prisms 71 is incident from near the geometric center of the convex lens 91. Finally, as much light as possible is converged through the convex lens 91, thereby improving the brightness of the normal viewing angle and improving the display effect of the display panel.

[0143] In some embodiments of the present application, reference Fig.15 and Fig.16 As shown, the first light extraction layer 7 includes a middle area and edge areas on both sides of the middle area, wherein the height of each prism 71 in the first light extraction layer 7 in a direction perpendicular to the light-emitting substrate 100 gradually decreases along a third direction; the third direction is the direction from the edge area to the middle area, or the third direction is the direction from the middle area to the edge area.

[0144] In an exemplary embodiment, reference Fig.15 As shown, the height of each prism 71 in the first light extraction layer 7 in a direction perpendicular to the light emitting substrate 100 gradually decreases from the middle area to the edge area.

[0145] In practical applications, since the side of the first light extraction layer 7 away from the light emitting device 3 is also provided with a color resist layer 12 and a black matrix layer 11, if the prism 71 located at the edge area of ​​the light emitting side of the light emitting device 3 is higher, the light emitted from the edge area of ​​the light emitting device 3 is refracted by the higher prism 71 at the edge area, and it is highly likely that it cannot be emitted from the color resist layer 12, but enters the black matrix layer 11 and is absorbed, which greatly reduces the light output intensity of the display panel and reduces the display effect. In the embodiment of the present application, by setting the Fig.15The structure of the first light extraction layer 7 shown is such that the height of the prism 71 located in the middle area on the light emitting side of the light emitting device 3 is greater than the height of the prism 71 located in the edge area on the light emitting side of the light emitting device 3. In this way, the higher prism 71 has a stronger refractive effect (larger refraction angle) on the light emitted from the light emitting device 3, and the lower prism 71 has a weaker refractive effect (smaller refraction angle) on the light emitted from the light emitting device 3; the refraction angle of the light emitted from the edge area of ​​the light emitting device 3 is smaller, thereby reducing the loss of light, and the refraction angle of the light emitted from the middle area is larger, thereby adjusting the light output intensity at different viewing angles, thereby improving the chromatic aberration problem at different viewing angles while avoiding reducing the light output intensity at the normal viewing angle.

[0146] In an exemplary embodiment, reference Fig.16 As shown, the height of each prism 71 in the first light extraction layer 7 in a direction perpendicular to the light emitting substrate 100 gradually increases from the middle area to the edge area.

[0147] In the embodiment of the present application, before the first light extraction layer 7 and the second light extraction layer 9 are provided, if the brightness attenuation of different colored lights at different viewing angles is inconsistent (for example, the brightness attenuation of blue light is serious as the viewing angle increases, and the brightness attenuation of red light and green light is small as the viewing angle increases), in order to make the brightness attenuation of different colored lights consistent as the viewing angle increases, the first light extraction layer 7 can be provided on the light exiting side of the first color conversion pattern 61 and the second color conversion pattern 62, and the height of each prism 71 in the first light extraction layer 7 in the direction perpendicular to the light emitting substrate 100 is gradually increased from the middle area to the edge area. In this way, while the prism 71 adjusts the angle of the exiting light of the first color conversion pattern 61 and the second color conversion pattern 62, it can intensify the attenuation of the light emitted from the first color conversion pattern 61 and the second color conversion pattern 62 to a certain extent as the viewing angle increases, so that the brightness attenuation of different colored lights is consistent as the viewing angle increases, and the color difference problem of the display panel at a large viewing angle is improved.

[0148] In some embodiments of the present application, reference Fig.17 , Fig.18 , Fig.19 and Fig. 20 As shown, the second light extraction layer 9 includes a central area and a peripheral area surrounding the central area, and the height of each convex lens 91 in the second light extraction layer in a direction perpendicular to the light-emitting substrate 100 gradually decreases along a fourth direction; the fourth direction is the direction from the peripheral area to the central area, or, the fourth direction is the direction from the central area to the peripheral area.

[0149] In an exemplary embodiment, reference Fig.17As shown, the height of the prism 71 in the first light extraction layer 7 gradually decreases from the middle to both sides, and the height of the convex lens 91 in the second light extraction layer 9 gradually increases from the central area to the peripheral area surrounding the central area.

[0150] In this way, the prism 71 in the first light extraction layer 7 has a larger refraction angle for the light emitted from the middle area of ​​the light-emitting device 3 (which can be understood as the degree to which the light deviates from the normal viewing angle is larger), and a smaller refraction angle for the light emitted from the edge area of ​​the light-emitting device 3 (which can be understood as the degree to which the light deviates from the normal viewing angle is smaller), so that as much light as possible can pass through the second light extraction layer 9 and then be emitted from the display panel, thereby improving the light output intensity of the display panel. In addition, the convex lens 91 located at the periphery of the second light extraction layer 9 has a stronger focusing ability than the convex lens located in the central area, which largely avoids the light emitted from the edge from entering the black matrix layer 11, thereby allowing the light to be emitted from the color resist layer 12, further improving the light output intensity of the display panel at the normal viewing angle, improving the brightness of the display panel, and reducing power consumption.

[0151] In an exemplary embodiment, reference Fig.18 As shown, the height of the prism 71 in the first light extraction layer 7 gradually decreases from the middle to both sides, and the height of the convex lens 91 in the second light extraction layer 9 gradually decreases from the central area to the peripheral area surrounding the central area.

[0152] In an exemplary embodiment, reference Fig.19 As shown, the height of the prism 71 in the first light extraction layer 7 gradually increases from the middle to both sides, and the height of the convex lens 91 in the second light extraction layer 9 gradually increases from the central area to the peripheral area surrounding the central area.

[0153] In an exemplary embodiment, reference Fig. 20 As shown, the height of the prism 71 in the first light extraction layer 7 gradually increases from the middle to both sides, and the height of the convex lens 91 in the second light extraction layer 9 gradually decreases from the central area to the peripheral area surrounding the central area.

[0154] In this way, if there is a situation where the brightness attenuation of light of different colors is inconsistent at different viewing angles (for example, the brightness of blue light attenuates severely with the increase of the viewing angle, while the brightness of red light and green light attenuates less with the increase of the viewing angle), in order to make the brightness attenuation of light of different colors consistent with the increase of the viewing angle, a first light extraction layer 7 can be provided on the light output side of the first color conversion pattern 61 and the second color conversion pattern 62, and the height of each prism 71 in the first light extraction layer 7 in the direction perpendicular to the light-emitting substrate 100 gradually increases from the middle area to the edge area. In this way, while the prism 71 adjusts the angles of the outgoing light rays of red and green light, it can, to a certain extent, intensify the attenuation of the outgoing light rays of red and green light as the viewing angle increases, so that the brightness attenuation of light rays of different colors is consistent as the viewing angle increases, thereby improving the chromatic aberration problem of the display panel at a wide viewing angle; in addition, the height of the convex lens 91 in the second light extraction layer 9 can be set to gradually decrease from the central area to the peripheral area surrounding the central area, thereby weakening the focusing effect of the convex lens 91 on the light emitted from the edge area, thereby improving the brightness of the display panel at the positive viewing angle, and, to a certain extent, intensifying the attenuation of red and green light as the viewing angle increases, thereby making the brightness attenuation of light rays of different colors consistent as the viewing angle increases, further improving the chromatic aberration problem of the display panel at a wide viewing angle.

[0155] It should be noted that the embodiment of the present application is described by taking the first light-emitting device 31, the second light-emitting device 32 and the third light-emitting device 33 all emitting blue light, the first color conversion pattern 61 including red quantum dots, the second color conversion pattern 62 including green quantum dots, and the light-transmitting pattern 63 including light-transmitting resin as an example.

[0156] In some embodiments of the present application, reference Figure 1 As shown, the display panel also includes a first covering layer 8 and a second covering layer 10, the first covering layer 8 at least covers the first light extraction layer 7, and the second covering layer 10 covers the second light extraction layer 10; wherein the refractive index of the first light extraction layer 7 is greater than the refractive index of the first covering layer 8, and the refractive index of the second light extraction layer 9 is greater than the refractive index of the second covering layer 10.

[0157] In an exemplary embodiment, the refractive index of the first light extraction layer 7 and the refractive index of the second light extraction layer 9 are both in the range of 1.45 to 1.75.

[0158] Exemplarily, the materials of the first light extraction layer 7 and the second light extraction layer 9 may both be organic materials.

[0159] Exemplarily, the organic material may include at least one of acrylic resin, epoxy resin, and acrylic resin.

[0160] Exemplarily, the refractive index of the first cover layer 8 and the refractive index of the second cover layer 10 are in the range of 1.2 to 1.7.

[0161] Exemplarily, the thickness of the first cover layer 8 and the second cover layer 10 is in the range of 10 μm to 50 μm.

[0162] Here, there is no limitation on whether the thickness of the first covering layer 8 and the second covering layer 10 are the same, which can be determined according to actual conditions.

[0163] In some embodiments of the present application, the refractive index of the first covering layer 8 is greater than the refractive index of the second light extraction layer 10 .

[0164] In an embodiment of the present application, by setting the refractive index of the first light extraction layer 7 to be greater than the refractive index of the first covering layer 8, and the refractive index of the second light extraction layer 9 to be greater than the refractive index of the second covering layer 10, the efficiency of light emitting from the light extraction layer through the encapsulation layer to the display panel can be improved, light loss can be reduced, and the light output intensity of the display panel can be increased, thereby improving the display effect.

[0165] In some embodiments of the present application, the prism 71 is an isosceles prism.

[0166] In an embodiment of the present application, the prism 71 is set to be an isosceles prism so that the prism 71 has a mirror-symmetrical structure. In this way, the two light-emitting surfaces of the prism 71 can be made symmetrical, so that the light emitted from the two light-emitting surfaces of the prism 71 is evenly distributed, thereby improving the distribution uniformity of the light emitted by the display panel, and further improving the brightness uniformity of the display panel.

[0167] Below Figure 1 Taking the structure shown as an example, the attenuation contrast curves of the light output intensity of the display panel provided by the embodiment of the present application and the light output intensity of the display panel in the related art at different viewing angles are described. Among them, the display panel provided by the embodiment of the present application is provided with a first light extraction layer 7 on the light output side of the first color conversion pattern 61 and the second color conversion pattern 62, and a second light extraction layer 10 is provided on the light output side of the first color conversion pattern 61, the second color conversion pattern 62 and the light-transmitting pattern 63. The first light-emitting device 31, the second light-emitting device 32 and the third light-emitting device 33 are blue OLED (Organic Light-Emitting Diode) light-emitting layers, the first color conversion pattern 61 includes red quantum dots, the second color conversion pattern 62 includes a green quantum dot layer, the light-transmitting pattern 63 includes a light-transmitting resin, the first color resistance pattern 121 is a red color resistance pattern, the second color resistance pattern 122 is a green color resistance pattern, and the third color resistance pattern 123 is a blue color resistance pattern.

[0168] Since each light emitting device 3 of the display panel provided in the embodiment of the present application is a blue light OLED light emitting device, Fig.23The light intensity attenuation curves of different colors of light at different viewing angles of the display panel in the related art show that the light intensity of blue light (marked B) decays severely at a wide viewing angle, while the light intensity of red light (marked R) and green light (marked G) decays slowly at a wide viewing angle, causing the display panel in the related art to have a yellowish color at a wide viewing angle. To solve the problem of yellowish color of the display at a wide viewing angle, the brightness attenuation of the three colors of light at different viewing angles must be consistent.

[0169] Fig.21 FIG. 1 shows the light intensity attenuation curves of the display panel provided by the embodiment of the present application at different viewing angles before and after the first light extraction layer 7 is set on the light exit side of the first color conversion pattern 61 and the second color conversion pattern 62. Among them, the mark Without7&9 means that the first light extraction layer 7 is not set, the mark With7-Direction OB is the light intensity curve at different viewing angles in the extension direction of the prism 71 in the first light extraction layer 7, and the mark With7-Direction OA is the light intensity attenuation curve at different viewing angles in the arrangement direction of the prism 71 in the first light extraction layer 7. Fig.21 From the data in, it can be seen that when only the first light extraction layer 7 is provided, the light intensity attenuation of the display panel at a wide viewing angle is aggravated, but because the multiple prisms 71 in the first light extraction layer 7 extend along the first direction OB and are arranged along the second direction OA, the light intensity attenuation curve along the first direction OB appears upward at a wide viewing angle. This shows that only providing the first light extraction layer 7 has limited effect on improving the yellowing problem of the display panel at a wide viewing angle.

[0170] Fig. 22 The figure shows the light intensity attenuation curves of the display panel provided by the embodiment of the present application, in which the first light extraction layer 7 is respectively arranged on the light exiting side of the first color conversion pattern 61 and the second color conversion pattern 62, and the light exiting side of the first color conversion pattern 61, the second color conversion pattern 62 and the light transmission pattern 63, respectively, before and after the second light extraction layer 9 at different viewing angles. Among them, the mark Without7&9 means that the first light extraction layer and the second light extraction layer are not arranged; the mark With7&9 means that the first light extraction layer and the second light extraction layer are arranged. Obviously, the combination of Fig.23 The light intensity attenuation curve of the blue light shows that after the first light extraction layer 7 is arranged on the light exiting sides of the first color conversion pattern 61 and the second color conversion pattern 62, and the second light extraction layer 9 is arranged on the light exiting sides of the first color conversion pattern 61, the second color conversion pattern 62 and the light transmitting pattern 63, the light intensity of the display panel at the normal viewing angle (near 0°) increases, and the light intensity attenuation of the display panel at a large viewing angle is consistent with the blue light attenuation curves.

[0171] Fig.23The light intensity attenuation (L-Decay) curves of the red light, green light and blue light of the display panel are shown when the first light extraction layer 7 and the second light extraction layer 9 are not provided. Obviously, the attenuation trends of the three are inconsistent. Fig.24 The figure shows that after a first light extraction layer 7 is arranged on the light exiting side of the first color conversion pattern 61 and the second color conversion pattern 62, and a second light extraction layer 10 is arranged on the light exiting side of the first color conversion pattern 61, the second color conversion pattern 62 and the light-transmitting pattern 63, the brightness attenuation curves of red light, green light and blue light are shown. Obviously, the brightness attenuation trends of the three colors of light are consistent. In this way, the problem of color deviation of the display panel at different viewing angles (including large viewing angles) is improved, and the display effect of the display panel is improved.

[0172] Fig.25 The figure shows the trajectory of the white point coordinates of a display panel changing with the viewing angle in the color gamut diagram before and after the first light extraction layer 7 and the second light extraction layer 9 are set. The dotted arrow indicates the trajectory of the white point changing with increasing viewing angle before the first light extraction layer 7 and the second light extraction layer 9 are set. It can be seen that the white point gradually becomes yellowish as the viewing angle increases. The solid arrow indicates the trajectory of the white point changing with increasing viewing angle before the first light extraction layer 7 and the second light extraction layer 9 are set. It can be seen that the problem of the white point turning yellow is improved as the viewing angle increases.

[0173] An embodiment of the present application provides a display device, comprising the display panel as described above, and further comprising a driver IC for driving the display panel and a power supply circuit for supplying power.

[0174] The specific structure of the display panel included in the above-mentioned display device can be referred to the above description, which will not be repeated here.

[0175] In the display device provided in the embodiment of the present application, a first light extraction layer 7 is provided on the light emitting side of at least part of the light emitting device 3, and the first light extraction layer 7 includes a plurality of prisms 71 extending along the first direction BO and arranged along the second direction OA. The prisms 71 can refract the light emitted from the light emitting substrate 100, and adjust the light intensity of each sub-pixel in the display panel at different viewing angles, thereby improving the large viewing angle difference of the display panel. Then, a second light extraction layer 9 is provided, and the second light extraction layer 9 includes a plurality of convex lenses 91 arranged in an array, and the plurality of convex lenses 91 arranged in an array can work together with the plurality of prisms 71. On the one hand, since the prisms 71 extend along the first direction OB and are arranged along the second direction OA, a difference in the light intensity in the first direction OB and the second direction OA in the display panel may be caused, and the convex lenses 91 can improve the difference in the light intensity in the first direction OB and the second direction OA in the display panel; on the other hand, the convex lenses 91 can have a good convergence effect on the optical light emitted from the first light extraction layer 7 and between two adjacent prisms 71 in the first light extraction layer 7, thereby improving the overall light output intensity and improving the display effect. In addition, the maximum dimension W of the prism 71 along the second direction OA is less than or equal to the maximum dimension W of the convex lens 91 along the second direction OA, so that as much light as possible that passes through the prism 71 and is refracted can be incident on the convex lens 91, further improving the focusing effect of the convex lens 91 and further improving the light extraction efficiency.

[0176] The display device provided in the embodiment of the present application may further include other structures and components. The other structures and components included in the display device may refer to the relevant technology and are not limited here.

[0177] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A display panel, in, include: A light-emitting substrate, the light-emitting substrate comprising a plurality of light-emitting devices arranged in an array; A first light extraction layer, located at least on a light emitting side of a portion of the light emitting device, comprising a plurality of prisms extending along a first direction and arranged along a second direction; A second light extraction layer, located at the light emitting side of the light emitting device and at a side of the first light extraction layer away from the light emitting substrate, comprising a plurality of convex lenses arranged in an array; The orthographic projection of the first light extraction layer on the light-emitting substrate is located within the orthographic projection of the second light extraction layer on the light-emitting substrate, and the maximum size of the prism along the second direction is less than or equal to the maximum size of the convex lens along the second direction; the first direction and the second direction intersect; The display panel comprises a substrate, a color conversion layer and a color resist layer, wherein the color conversion layer is located between part of the light emitting device and the first light extraction layer, and the color resist layer is located on a side of the second light extraction layer away from the light emitting substrate; wherein the orthographic projection of the color conversion layer on the substrate at least covers the orthographic projection of part of the light emitting device on the substrate, and the orthographic projection of the color resist layer on the substrate overlaps with the orthographic projection of the color conversion layer on the substrate; The light-emitting device comprises a first light-emitting device, a second light-emitting device and a third light-emitting device; the color conversion layer comprises a first color conversion pattern located on the light-emitting side of the first light-emitting device and a second color conversion pattern located on the light-emitting side of the second light-emitting device; the display panel further comprises a light-transmitting pattern located on the light-emitting side of the third light-emitting device, and the light-transmitting pattern is arranged on the same layer as the color conversion layer; wherein the light-emitting colors of the first light-emitting device, the second light-emitting device and the third light-emitting device are the same, and the colors of the light after passing through the first color conversion pattern, the light after passing through the second color conversion pattern and the light after passing through the light-transmitting pattern are different; The first light extraction layer is arranged on the light emitting side of the first color conversion pattern and the second color conversion pattern, and the height of each prism in the first light extraction layer in a direction perpendicular to the light emitting substrate gradually increases from the middle area to the edge area; the height of the convex lens in the second light extraction layer is arranged to gradually decrease from the central area to the peripheral area surrounding the central area.

2. The display panel according to claim 1, in, Along the second direction, the distance between each two adjacent prisms is greater than or equal to the distance between each two adjacent convex lenses.

3. The display panel according to claim 1, in, For the first light extraction layer and the second light extraction layer located on the light emitting side of the same light emitting device, the outer contour of the orthographic projection of the first light extraction layer on the light emitting substrate is located within the outer contour of the orthographic projection of the second light extraction layer on the light emitting substrate.

4. The display panel according to claim 3, in, For the first light extraction layer and the second light extraction layer located on the light emitting side of the same light emitting device, the outer contour of the orthographic projection of the first light extraction layer on the light emitting substrate is located within the outer contour of the orthographic projection of the first pattern on the light emitting substrate; The first figure is a closed figure formed by sequentially connecting the focal points of a plurality of the convex lenses located on the outermost side of the second light extraction layer.

5. The display panel according to claim 4, in, The display panel further comprises a color resist layer, and the color resist layer is located on a side of the second light extraction layer away from the light emitting substrate; The outer contour of the orthographic projection of the second light extraction layer on the light-emitting substrate is located within the outer contour of the orthographic projection of the color resist layer on the light-emitting substrate.

6. The display panel according to claim 4, in, The display panel further comprises a color resist layer, and the color resist layer is located on a side of the second light extraction layer away from the light emitting substrate; The orthographic projection of the second light extraction layer on the light-emitting substrate partially overlaps with the orthographic projection of the color resist layer on the light-emitting substrate, and the outer contour of the orthographic projection of the first graphic on the light-emitting substrate is located within the outer contour of the orthographic projection of the color resist layer on the light-emitting substrate.

7. The display panel according to claim 1, in, The first color conversion pattern and the second color conversion pattern include quantum dots respectively, and the light-transmitting pattern includes scattering particles.

8. The display panel according to claim 1, in, The orthographic projection of a row of the convex lenses on the light-emitting substrate overlaps with the orthographic projection of at least one of the prisms on the light-emitting substrate.

9. The display panel according to claim 8, in, Along the second direction, the number of the prisms included in the first light extraction layer is greater than or equal to the number of the convex lenses included in the second light extraction layer.

10. The display panel according to claim 9, in, Along the second direction, the number of the prisms included in the first light extraction layer is greater than the number of the convex lenses included in the second light extraction layer.

11. The display panel according to claim 10, in, The orthographic projection of a row of convex lenses on the light-emitting substrate overlaps with the orthographic projection of the two prisms on the light-emitting substrate, and the orthographic projection of the line connecting the focal points of a row of convex lenses on the light-emitting substrate is located between the orthographic projections of the two prisms on the light-emitting substrate.

12. The display panel according to claim 1, in, The display panel further includes a first covering layer and a second covering layer, wherein the first covering layer at least covers the first light extraction layer, and the second covering layer covers the second light extraction layer; The refractive index of the first light extraction layer is greater than the refractive index of the first covering layer, and the refractive index of the second light extraction layer is greater than the refractive index of the second covering layer.

13. The display panel according to claim 12, in, The refractive index of the first cover layer is greater than the refractive index of the second light extraction layer.

14. A display device, in, Comprising the display panel as claimed in any one of claims 1 to 13.

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