Display panel and display device

Abstract

The present disclosure provides a display panel and a display device, comprising: a substrate; a plurality of light-emitting devices having different light-emitting areas, the light-emitting devices being located on the substrate; a first refractive index layer comprising a plurality of opening regions corresponding to the plurality of light-emitting devices, the projections of the opening regions on the substrate at least partially overlapping with the projections of the light-emitting devices on the substrate; wherein the profile shape of the sidewalls of at least some of the opening regions in a cross-section parallel to the substrate surface comprises a plurality of concave and convex curves; the first refractive index layer is configured to reflect light emitted by the light-emitting devices at the sidewalls; and a second refractive index layer located on a side of the first refractive index layer facing away from the substrate, the second refractive index layer being disposed over the entire surface and filling each opening region, the refractive index of the second refractive index layer being greater than that of the first refractive index layer.

Description

Technical Field

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

[0002] Compared with liquid crystal displays (LCDs), organic electroluminescent display panels (OLEDs) have the advantages of self-luminescence, fast response, wide viewing angle, high brightness, bright colors, and light weight. They are one of the hot topics in the current display research field and are considered to be the next generation of display technology. Summary of the Invention

[0003] Embodiments of the present disclosure provide a display panel and a display device for improving the light extraction efficiency of blue sub-pixels.

[0004] Therefore, an embodiment of the present disclosure provides a display panel, including:

[0005] substrate;

[0006] a plurality of light-emitting devices having different light-emitting areas, wherein the light-emitting devices are located on the substrate;

[0007] The first refractive index layer includes a plurality of opening regions corresponding to the plurality of light-emitting devices, wherein projections of the opening regions on the substrate at least partially overlap with projections of the light-emitting devices on the substrate; wherein the profile of the sidewalls of at least some of the opening regions in a cross section parallel to the surface of the substrate comprises a plurality of concave and convex curves; and the first refractive index layer is configured to reflect light emitted by the light-emitting devices at the sidewalls;

[0008] The second refractive index layer is located on a side of the first refractive index layer away from the substrate. The second refractive index layer is disposed on the entire surface and fills each of the opening areas. The refractive index of the second refractive index layer is greater than that of the first refractive index layer.

[0009] Optionally, in the above-mentioned display panel provided in the embodiment of the present disclosure, in the side wall of the opening area corresponding to the light-emitting device with the largest light-emitting area in the direction parallel to the surface of the substrate, the top edge and / or bottom edge of the side wall includes multiple concave and convex curves.

[0010] Optionally, in the above-mentioned display panel provided by the embodiment of the present disclosure, the substrate includes a plurality of first sub-pixel regions, a second sub-pixel region, and a third sub-pixel region of different colors, and the plurality of light-emitting devices with different light-emitting areas include a first-area light-emitting device, a second-area light-emitting device, and a third-area light-emitting device, the first-area light-emitting device corresponds to the first sub-pixel region, the second-area light-emitting device corresponds to the second sub-pixel region, and the third-area light-emitting device corresponds to the third sub-pixel region; wherein,

[0011] The luminous efficiency of the third sub-pixel area is lower than that of the first sub-pixel area and lower than that of the second sub-pixel area. In the side wall of the opening area corresponding to the third sub-pixel area, the top edge and / or bottom edge of the side wall includes multiple concave and convex curves.

[0012] Optionally, in the above-mentioned display panel provided by an embodiment of the present disclosure, in a direction parallel to the surface of the substrate, the shape of the curve is an “S” or “Z” shape.

[0013] Optionally, in the display panel provided by an embodiment of the present disclosure, along the thickness direction of the substrate, a cross-sectional shape of the opening area is approximately an inverted trapezoid.

[0014] Optionally, the above-mentioned display panel provided in the embodiment of the present disclosure further includes a micro-prism structure located in at least a portion of the opening area, and the orthographic projection area of ​​the micro-prism structure on the substrate is smaller than the orthographic projection area of ​​the at least portion of the opening area on the substrate; the micro-prism structure is arranged in the same layer as the first refractive index layer.

[0015] Optionally, in the above-mentioned display panel provided by the embodiment of the present disclosure, the micro-prism structure is located in an opening area corresponding to the light-emitting device with the largest light-emitting area.

[0016] Optionally, in the above-mentioned display panel provided by an embodiment of the present disclosure, the micro-prism structure is located in a central area of ​​the opening area.

[0017] Optionally, in the above-mentioned display panel provided by an embodiment of the present disclosure, the slope angle of the micro-prism structure is approximately the same as the slope angle of the first refractive index layer, and the height of the micro-prism structure is the same as the height of the first refractive index layer.

[0018] Optionally, in the above-mentioned display panel provided by an embodiment of the present disclosure, a cross-sectional shape of the micro-prism structure along the thickness direction of the substrate is a regular trapezoid, a triangle or an arc.

[0019] Optionally, in the above-mentioned display panel provided by the embodiment of the present disclosure, the slope angle of the micro-prism structure is 50° to 70°, and the bottom width of the cross section of the micro-prism structure along the thickness direction of the substrate is 1um to 8um.

[0020] Optionally, the above-mentioned display panel provided in the embodiment of the present disclosure further includes an encapsulation layer located on the side of the second refractive index layer away from the substrate, the light-emitting device includes an anode, a light-emitting layer and a cathode stacked in sequence on the substrate, and the first refractive index layer is located between the cathode and the second refractive index layer.

[0021] Optionally, in the above-mentioned display panel provided by an embodiment of the present disclosure, the material of the first refractive index layer includes polyimide, and the material of the second refractive index layer includes SiNx.

[0022] Optionally, the display panel provided in the embodiment of the present disclosure further includes an encapsulation layer located between the light-emitting device and the first refractive index layer.

[0023] Optionally, the display panel provided in the embodiment of the present disclosure further includes: a touch structure located between the encapsulation layer and the second refractive index layer, and a flat layer located between the touch structure and the second refractive index layer; the flat layer is reused as the first refractive index layer.

[0024] Optionally, in the above-mentioned display panel provided in an embodiment of the present disclosure, the touch structure includes a stacked first touch electrode layer, a touch insulation layer and a second touch electrode layer, the first touch electrode layer is close to the substrate, and the first refractive index layer is arranged on a side of the second touch electrode layer away from the substrate.

[0025] Optionally, in the above-mentioned display panel provided in the embodiment of the present disclosure, the first touch electrode layer and the second touch electrode layer include multiple metal grids, the metal grids include multiple metal wires, the multiple metal wires are staggered to define meshes of the metal grids, the orthographic projections of the metal wires on the substrate are located between adjacent light-emitting devices, and the first refractive index layer covers the metal wires.

[0026] Optionally, in the above-mentioned display panel provided by an embodiment of the present disclosure, the material of the first refractive index layer includes resin, and the material of the second refractive index layer includes resin mixed with acrylic particles or acrylic material.

[0027] Optionally, in the above-mentioned display panel provided by the embodiment of the present disclosure, the light-emitting device includes a red light-emitting device, a green light-emitting device and a blue light-emitting device, and the light-emitting device with the largest light-emitting area is the blue light-emitting device.

[0028] Optionally, in the above-mentioned display panel provided by the embodiment of the present disclosure, the orthographic projection area of ​​the opening region on the substrate is greater than or equal to the orthographic projection area of ​​the effective light-emitting region of the light-emitting device on the substrate.

[0029] Correspondingly, an embodiment of the present disclosure further provides a display device, comprising any of the display panels described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic structural diagram of a display panel provided in the related art;

[0031] Figure 2 A schematic structural diagram of another display panel provided in the related art;

[0032] Figure 3 A schematic structural diagram of another display panel provided in the related art;

[0033] Figure 4 A schematic structural diagram of a display panel provided in an embodiment of the present disclosure;

[0034] Figure 5 A schematic structural diagram of another display panel provided in an embodiment of the present disclosure;

[0035] Figure 6 for Figure 4 and Figure 5 A schematic structural diagram of the light emitting device 23 and the side wall 331;

[0036] Figure 7 for Figure 4 and Figure 5 Another structural diagram of the light emitting device 23 and the side wall 331;

[0037] Figure 8 A schematic structural diagram of another display panel provided in an embodiment of the present disclosure;

[0038] Figure 9 A schematic diagram of a top view of a display panel provided in an embodiment of the present disclosure;

[0039] Figure 10 A schematic structural diagram of another display panel provided in an embodiment of the present disclosure;

[0040] Figure 11 A schematic diagram of the structure of a display panel provided by the prior art;

[0041] Figure 12 A schematic structural diagram of another display panel provided in an embodiment of the present disclosure;

[0042] Figure 13A schematic structural diagram of another display panel provided in an embodiment of the present disclosure;

[0043] Figure 14 A schematic diagram of a top view of a display panel provided in an embodiment of the present disclosure;

[0044] Figure 15 A schematic structural diagram of another display panel provided in an embodiment of the present disclosure;

[0045] Figure 16 A schematic structural diagram of another display panel provided in an embodiment of the present disclosure;

[0046] Figure 17 A schematic structural diagram of another display panel provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0047] To make the objectives, technical solutions, and advantages of the present disclosure more clear, the present disclosure will be further described in detail below with reference to the accompanying drawings. It is apparent that the embodiments described are only a portion of the embodiments of the present disclosure, rather than all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present disclosure without creative effort are intended to fall within the scope of protection of the present disclosure.

[0048] The shapes and sizes of the components in the drawings do not reflect the actual scale, and are only intended to illustrate the present disclosure.

[0049] In traditional OLEDs, such as Figure 1 As shown, since the light emitted by the light-emitting device 10 eventually enters the air (low refractive index) from the glass cover 20 (high refractive index), when the incident angle of the light at the interface of the glass cover 10 reaches or exceeds the critical angle of total reflection, total internal reflection will occur, and most of the emitted light will be totally reflected and scattered within the device and consumed, resulting in low overall light extraction efficiency.

[0050] In order to improve the light extraction efficiency of OLED, Figure 2 As shown, micro prisms (Microlens) 40 can be made outside the encapsulation layer 30, that is, using low refractive index micro prisms 40 + high refractive index flat layer 50, and using the principle of total reflection to adjust the incident angle of light when it reaches the interface of the glass cover 20, reducing the total internal reflection of light in the oblique viewing direction and improving the light extraction efficiency.

[0051] The traditional RGB pixel arrangement can no longer meet the requirements of high-resolution products. In order to increase the proportion of sub-pixel luminous area while maintaining a comparable display effect, the GGRB pixel arrangement is currently more commonly used. The GGRB pixel arrangement can effectively improve the burn-in problem.

[0052] But in GGRB pixel arrangement, such as Figure 3 As shown, due to the larger area of ​​pixel B, many of the light rays emitted by it do not reach the critical angle of total reflection when reaching the interface of the microprism 40, and therefore ultimately cannot be emitted from the surface of the glass cover, resulting in the brightness gain of blue light being much lower than that of red and green light.

[0053] Based on this, in order to solve the problem that the brightness gain of blue light is much lower than that of red light and green light, the embodiment of the present disclosure provides a display panel, such as Figure 4-Figure 7 As shown, including:

[0054] Base 1;

[0055] A plurality of light-emitting devices (21, 22, 23) with different light-emitting areas, wherein the light-emitting devices (21, 22, 23) are located on a substrate 1;

[0056] The first refractive index layer 3 includes a plurality of opening areas (31, 32, 33) corresponding to the plurality of light-emitting devices (21, 22, 23), wherein the projection of the opening area (e.g., 31) on the substrate 1 at least partially overlaps with the projection of the light-emitting device 21 on the substrate 1; wherein the profile shape of the sidewall 331 of at least part of the opening area (e.g., 33) in a cross section parallel to the surface direction of the substrate 1 includes a plurality of concave and convex curves; the first refractive index layer 3 is used to reflect light emitted by the light-emitting devices (21, 22, 23) at the sidewall 331;

[0057] The second refractive index layer 4 is located on the side of the first refractive index layer 3 away from the substrate 1. The second refractive index layer 4 is arranged on the entire surface and fills each opening area (31, 32, 33). The refractive index of the second refractive index layer 4 is greater than the refractive index of the first refractive index layer 3.

[0058] It should be noted that Figure 4 and Figure 5 Two cross-sectional diagrams of the display panel are shown. Figure 6 and Figure 7 The picture can be Figure 4 Two schematic top views of the light emitting device 23, the opening region 33 and the first refractive index layer 3, Figure 6 and Figure 7 The graph can also be Figure 5 Two schematic top views of the light emitting device 23 , the opening area 33 and the first refractive index layer 3 .

[0059] In the above-mentioned display panel provided by the embodiment of the present disclosure, since the second refractive index layer 4 with a high refractive index covers the opening area (31, 32, 33) and the first refractive index layer 3 is a low refractive index layer, the side wall 331 of the opening area (for example, 33) is the interface where the light emitted by the light-emitting device 23 undergoes total reflection. The present disclosure increases the area of ​​the side wall 331 of the opening area (for example, 33) of at least part of the opening area of ​​the first refractive index layer 3 in the cross-section parallel to the surface direction of the substrate 1 to include multiple concave and convex curves, thereby increasing the interface area of ​​total reflection, thereby increasing the amount of light that undergoes total reflection, and further increasing the light output gain of the light-emitting device 23.

[0060] In specific implementation, in the above display panel provided in the embodiment of the present disclosure, if Figure 4 As shown, it also includes an encapsulation layer 5 located on the side of the second refractive index layer 4 facing away from the substrate 1, that is, the first refractive index layer 3 and the second refractive index layer 4 provided in the embodiment of the present disclosure are manufactured before the display panel is encapsulated; the light-emitting device (21, 22, 23) includes an anode, a light-emitting layer and a cathode (not shown) stacked in sequence on the substrate 1, and the first refractive index layer 3 is located between the cathode and the second refractive index layer 4.

[0061] In specific implementation, in the above display panel provided in the embodiment of the present disclosure, if Figure 4 As shown, the material of the first refractive index layer 3 may include polyimide, and the material of the second refractive index layer 4 may include SiNx. Specifically, since a pixel definition layer (PDL) is required to define the pixel opening area when manufacturing a display panel, and the light-emitting device is manufactured in the corresponding pixel opening area, and the material of the PDL is generally polyimide, the first refractive index layer 3 in the embodiment of the present disclosure can be made of PDL material; specifically, the refractive index of polyimide is 1.65, and the refractive index of SiNx is 1.94.

[0062] It should be noted that the embodiments of the present disclosure Figure 4 The following example illustrates a first refractive index layer made of a PDL material (polyimide) and a second refractive index layer made of SiNx, which facilitates fabrication. Of course, in practice, the first and second refractive index layers may also be made of other materials, as long as the refractive index of the second refractive index layer is greater than that of the first refractive index layer.

[0063] In specific implementation, in the above display panel provided in the embodiment of the present disclosure, if Figure 5 As shown, it also includes an encapsulation layer 5 located between the light-emitting devices (21, 22, 23) and the first refractive index layer 3, that is, the first refractive index layer 3 and the second refractive index layer 4 provided in the embodiment of the present disclosure are manufactured after the display panel is encapsulated.

[0064] In specific implementation, in the above display panel provided in the embodiment of the present disclosure, if Figure 8 As shown, the touch structure 6 is further comprised between the encapsulation layer 5 and the second refractive index layer 4, and a planarization layer 7 is positioned between the touch structure 6 and the second refractive index layer 4. The planarization layer 7 is reused as the first refractive index layer 3, eliminating the need to fabricate the first refractive index layer 3 separately on the planarization layer 7, thus saving a film layer. Specifically, the planarization layer 7 is used to flatten the surface of the touch structure 6 for subsequent fabrication. Although the planarization layer 7 is reused as the first refractive index layer 3, which has an opening, the second refractive index layer 4 is provided across the entire surface and covers the opening. Therefore, it is the second refractive index layer 4 that actually performs the flattening function. Therefore, the disclosed embodiments do not affect the flatness of subsequent film layers.

[0065] In specific implementation, in the above display panel provided in the embodiment of the present disclosure, if Figure 8 As shown, the touch structure 6 includes a stacked first touch electrode layer 61, a touch insulation layer 62, and a second touch electrode layer 63. The first touch electrode layer 61 is close to the substrate 1, and the first refractive index layer 3 is disposed on a side of the second touch electrode layer 63 away from the substrate 1. Specifically, one of the first touch electrode layer 61 and the second touch electrode layer 63 is a driving electrode, and the other is a sensing electrode.

[0066] In specific implementation, in the above display panel provided in the embodiment of the present disclosure, if Figure 9 As shown, Figure 9 for Figure 8 Schematic top view of some film layers, the first touch electrode layer 61 and the second touch electrode layer 63 include multiple metal grids, the metal grids include multiple metal wires 601, the multiple metal wires 601 are staggered to define meshes 602 of the metal grids, the orthographic projections of the metal wires 601 on the substrate 1 are located between adjacent light-emitting devices, and the first refractive index layer 3 covers the metal wires 601.

[0067] In specific implementation, in the above display panel provided in the embodiment of the present disclosure, if Figure 5 and Figure 8 As shown, the material of the first refractive index layer 3 may include resin (the material of the flat layer), and the material of the second refractive index layer 4 may include resin mixed with acrylic particles or acrylic material. Specifically, the refractive index of the resin mixed with acrylic particles is higher than that of the resin alone, and the refractive index of the acrylic material is higher than that of the resin.

[0068] In a specific implementation, for example, in order to make the light emitted by the light emitting device be totally reflected at the interface of the first refractive index layer as much as possible, in the above-mentioned display panel provided in the embodiment of the present disclosure, as Figure 4 、 Figure 5 and Figure 8As shown, the orthographic projection area of ​​the opening region (eg 33 ) on the substrate 1 is greater than or equal to the orthographic projection area of ​​the effective light emitting region of the light emitting device 23 on the substrate 1 .

[0069] In specific implementation, in order to achieve a larger proportion of sub-pixel luminous area under the premise of equivalent display effect, such as Figure 10 As shown, the embodiment of the present disclosure adopts a GGRB pixel arrangement, where 21 represents an R sub-pixel, 22 represents a G sub-pixel, and 23 represents a B sub-pixel. The GGRB pixel arrangement can effectively improve the burn-in problem. Therefore, in the above-mentioned display panel provided in the embodiment of the present disclosure, as shown in FIG. Figure 4 、 Figure 5 and Figure 8 As shown, the light emitting devices (21, 22, 23) may include a red light emitting device 21, a green light emitting device 22 and a blue light emitting device 23, and the light emitting device 23 with the largest light emitting area is the blue light emitting device.

[0070] In a specific implementation, in order to increase the light emission angle of the light emitting device, in the above-mentioned display panel provided in the embodiment of the present disclosure, as Figure 4 、 Figure 5 and Figure 8 As shown, along the thickness direction of the substrate 1 , the cross-sectional shape of the opening region ( 31 , 32 , 33 ) is approximately an inverted trapezoid.

[0071] In specific implementation, Figure 4 and Figure 10 As shown, since the blue light emitting device 23 has a larger light emitting area, the refractive index n1 of the first refractive index layer 3 (polyimide) is 1.65, and the refractive index n2 of the second refractive index layer 4 (SiNx) is 1.94. Figure 11 As shown, Figure 11 In the existing technology Figure 3 In the cross-sectional diagram of pixel B shown in FIG, the incident angle θ1 of more light rays (such as light rays L in the center area of ​​pixel B) reaching the interface between the first refractive index layer 3 and the second refractive index layer 4 is less than the critical angle for total internal reflection (arcsin n1 / n2=58°), and finally undergoes total internal reflection again at the air interface after refraction, resulting in a significant decrease in the light output gain of pixel B. Therefore, in the above-mentioned display panel provided by the embodiment of the present disclosure, as shown in FIG. Figure 4-Figure 7 As shown, in a direction parallel to the surface of the substrate 1, in the sidewall 331 of the opening region 33 corresponding to the light-emitting device 23 with the largest light-emitting area, the top and / or bottom edges of the sidewall 331 include multiple concave and convex curves. This can increase the area of ​​the sidewall 331 of the opening region 33, thereby increasing the interface area for total internal reflection, thereby increasing the amount of light that undergoes total reflection and, in turn, improving the light output gain of the blue light-emitting device 23.

[0072] Specifically, the embodiment of the present disclosure is described by taking an example in which both the top and bottom edges of the side wall 331 include a plurality of concave and convex curves.

[0073] In specific implementation, in the above display panel provided in the embodiment of the present disclosure, if Figure 4 and Figure 5 As shown, the substrate 1 includes a plurality of first sub-pixel regions R, a second sub-pixel region G, and a third sub-pixel region B of different colors, and a plurality of light-emitting devices (21, 22, 23) with different light-emitting areas include a first-area light-emitting device 21, a second-area light-emitting device 22, and a third-area light-emitting device 23. The first-area light-emitting device 21 corresponds to the first sub-pixel region R, the second-area light-emitting device 22 corresponds to the second sub-pixel region G, and the third-area light-emitting device 23 corresponds to the third sub-pixel region B; wherein,

[0074] The luminous efficiency of the third sub-pixel region B is lower than that of the first sub-pixel region R and lower than that of the second sub-pixel region G. The top and / or bottom edges of the sidewalls 331 of the opening region 33 corresponding to the third sub-pixel region B include multiple concave and convex curves. This increases the area of ​​the sidewalls 331 of the opening region 33, thereby increasing the interface area for total internal reflection, thereby increasing the amount of light that is fully reflected, and thus improving the light output gain of the light-emitting device 23 corresponding to the third sub-pixel region B.

[0075] In specific implementation, in the above display panel provided in the embodiment of the present disclosure, if Figure 4-Figure 7 As shown, in the direction parallel to the surface of the substrate 1, the curve shape can be "S" or "Z". Of course, the curve shape can also be other shapes.

[0076] Specifically, if Figure 6 As shown, the top and bottom curves of the side wall 331 are in an S-shape; Figure 7 As shown, the top and bottom curves of the side wall 331 are in a "Z" shape. Figure 6 and Figure 7 The top side can be "S" shaped and the bottom side can be "Z" shaped; or the top side can be "Z" shaped and the bottom side can be "S" shaped.

[0077] In specific implementation, in the above display panel provided in the embodiment of the present disclosure, if Figure 12-14As shown, the substrate 1 further includes a micro-prismatic structure 7 located within at least a portion of the opening region (e.g., 33). The orthographic projection area of ​​the micro-prismatic structure 7 on the substrate 1 is smaller than the orthographic projection area of ​​the opening region 33 corresponding to the light-emitting device 23 having the largest light-emitting area. The micro-prismatic structure 7 is provided on the same layer as the first refractive index layer 3. In this manner, the micro-prismatic structure 7 and the first refractive index layer 3 can be formed in a single patterning process by simply changing the original patterning pattern when forming the first refractive index layer 3. This eliminates the need for a separate process for preparing the micro-prismatic structure 7, simplifying the manufacturing process, saving production costs, and improving production efficiency.

[0078] It should be noted that Figure 12 and Figure 13 Two other cross-sectional diagrams of the display panel are shown. Figure 14 for Figure 12 and Figure 13 Schematic top view of the light emitting device 23, the opening area 33, the first refractive index layer 3 and the micro-prismatic structure 7.

[0079] In a specific implementation, since the blue light emitting device has a larger light emitting area, the incident angle θ1 of more light emitted by the blue light emitting device to the interface between the first refractive index layer and the second refractive index layer is smaller than the critical angle of total reflection, and finally after refraction, total internal reflection occurs again at the air interface, resulting in a significant reduction in the light output gain of the B pixel. Therefore, in the above-mentioned display panel provided in the embodiment of the present disclosure, if Figure 12-14 As shown, the micro-prism structure 7 is located in the opening area 33 corresponding to the light-emitting device 23 with the largest light-emitting area.

[0080] Specifically, if Figure 15 As shown, Figure 15 for Figure 12 and Figure 13 An enlarged schematic diagram of the blue light emitting device 23, the first refractive index layer 3, the second refractive index layer 4 and the micro-prism structure 7, in the embodiment of the present disclosure Figure 4 and Figure 5 On the basis of the structure, an independent micro-prism structure 7 is added in the opening area 33 corresponding to the blue light-emitting device 23. By utilizing the principle of refraction, the propagation direction of the light with a smaller incident angle (such as the light L in the center area of ​​the B pixel) can be changed (that is, after being refracted once at the interface of the micro-prism structure 7, it is incident on the interface of the first refractive index layer 3), thereby increasing the incident angle when it reaches the side wall of the opening area 33, so that the incident angle reaches the critical angle of total reflection, thereby allowing more light to be reflected out, and further improving the light output gain of the blue light-emitting device 23.

[0081] In a specific implementation, since the incident angle of the light emitted from the central area of ​​the blue light emitting device 23 to the interface of the first refractive index layer is relatively small, in order to make the incident angle of the light emitted from the central area of ​​the blue light emitting device 23 to the interface of the first refractive index layer reach the critical angle of total reflection, in the above-mentioned display panel provided in the embodiment of the present disclosure, as Figure 12-14 As shown, the micro-prism structure 7 is located in the center area of ​​the opening area 23 . Of course, the position of the micro-prism structure 7 may have a certain error with the center area of ​​the opening area 23 .

[0082] In a specific implementation, in order to make the incident angle of the light emitted by the blue light emitting device 23 reaching the interface of the first refractive index layer reach the critical angle of total reflection as much as possible, in the above-mentioned display panel provided in the embodiment of the present disclosure, as shown in FIG. Figure 15 As shown, the slope angle θ2 of the microprism structure 7 is approximately the same as the slope angle θ3 of the first refractive index layer 3 , and the height h1 of the microprism structure 7 is the same as the height h2 of the first refractive index layer 3 . Preferably, h1 and h2 are 2 μm to 4 μm.

[0083] In specific implementation, in the above display panel provided in the embodiment of the present disclosure, if Figure 12 、 Figure 13 and Figure 15 As shown, the slope angle θ2 of the micro-prism structure 7 is 50° to 70°, and the bottom width w of the cross section of the micro-prism structure 7 along the thickness direction of the substrate 1 is 1 μm to 8 μm, preferably 4 μm to 5 μm.

[0084] In specific implementation, in the above display panel provided in the embodiment of the present disclosure, if Figure 12 、 Figure 13 and Figure 15 As shown, the cross-sectional shape of the micro-prism structure 7 along the thickness direction of the substrate 1 can be a regular trapezoid; of course, it can also be other shapes, for example, Figure 16 As shown, the cross-sectional shape of the micro-prism structure 7 along the thickness direction of the substrate 1 is a triangle; Figure 17 As shown, the cross-sectional shape of the micro-prism structure 7 along the thickness direction of the substrate 1 is an arc shape.

[0085] Based on the same inventive concept, the present disclosure also provides a display device comprising the display panel of the above embodiment. Since the principle of solving the problem of this display device is similar to that of the above display panel, the implementation of this display device can refer to the implementation of the above display panel, and the repeated parts will not be repeated.

[0086] The display device provided in the embodiments of the present disclosure can be any product or component with a display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigation system. Other essential components of the display device are well understood by those skilled in the art and are not detailed here, nor should they be construed as limitations of the present disclosure.

[0087] In the above-mentioned display panel and display device provided by the embodiments of the present disclosure, since the second refractive index layer with a high refractive index covers the opening area and the first refractive index layer is a low refractive index layer, the side wall of the opening area is the interface where the light emitted by the light-emitting device undergoes total reflection. The present disclosure increases the side wall area of ​​the opening area by configuring the profile shape of the cross section of at least part of the opening area of ​​the first refractive index layer in a direction parallel to the substrate surface to include multiple concave and convex curves, thereby increasing the interface area of ​​total reflection, thereby increasing the amount of light that undergoes total reflection, and further improving the light output gain of the light-emitting device.

[0088] Obviously, those skilled in the art may make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include these modifications and variations.

Claims

1. A display panel, wherein: include: substrate; a plurality of light-emitting devices having different light-emitting areas, wherein the light-emitting devices are located on the substrate; The first refractive index layer includes a plurality of opening regions corresponding to the plurality of light-emitting devices, wherein projections of the opening regions on the substrate at least partially overlap with projections of the light-emitting devices on the substrate; wherein the profile of the sidewalls of at least some of the opening regions in a cross section parallel to the surface of the substrate comprises a plurality of concave and convex curves; and the first refractive index layer is configured to reflect light emitted by the light-emitting devices at the sidewalls; a second refractive index layer, located on a side of the first refractive index layer facing away from the substrate, the second refractive index layer being disposed entirely and filling each of the openings, the refractive index of the second refractive index layer being greater than the refractive index of the first refractive index layer; The substrate includes a plurality of first sub-pixel regions, a second sub-pixel region, and a third sub-pixel region of different colors, and the plurality of light-emitting devices with different light-emitting areas include a first-area light-emitting device, a second-area light-emitting device, and a third-area light-emitting device, wherein the first-area light-emitting device corresponds to the first sub-pixel region, the second-area light-emitting device corresponds to the second sub-pixel region, and the third-area light-emitting device corresponds to the third sub-pixel region; wherein, The luminous efficiency of the third sub-pixel area is lower than that of the first sub-pixel area and lower than that of the second sub-pixel area. The third sub-pixel area is a blue sub-pixel area. In the side wall of the opening area corresponding to the third sub-pixel area, the top edge and / or bottom edge of the side wall include multiple concave and convex curves.

2. The display panel according to claim 1, wherein: In a direction parallel to the surface of the substrate, in a side wall of the opening region corresponding to the light-emitting device with the largest light-emitting area, a top edge and / or a bottom edge of the side wall includes a plurality of concave-convex curves.

3. The display panel according to claim 1 or 2, wherein: In a direction parallel to the surface of the substrate, the curve is in an "S" or "Z" shape.

4. The display panel according to claim 1, wherein: Along the thickness direction of the substrate, the cross-sectional shape of the opening area is approximately an inverted trapezoid.

5. The display panel according to claim 1, wherein: Also included is a micro-prism structure located in at least a portion of the opening region, wherein an orthographic projection area of ​​the micro-prism structure on the substrate is smaller than an orthographic projection area of ​​the at least portion of the opening region on the substrate; The micro-prism structure is arranged in the same layer as the first refractive index layer.

6. The display panel according to claim 5, wherein: The micro-prism structure is located in an opening area corresponding to the light-emitting device with the largest light-emitting area.

7. The display panel according to claim 6, wherein: The micro-prism structure is located in the central area of ​​the opening area.

8. The display panel according to claim 6, wherein: The slope angle of the micro-prism structure is approximately the same as the slope angle of the first refractive index layer, and the height of the micro-prism structure is the same as the height of the first refractive index layer.

9. The display panel according to claim 6, wherein: The cross-sectional shape of the micro-prism structure along the thickness direction of the substrate is a regular trapezoid, a triangle or an arc.

10. The display panel according to claim 6, wherein: The slope angle of the micro-prism structure is 50° to 70°, and the bottom width of the cross section of the micro-prism structure along the thickness direction of the substrate is 1 μm to 8 μm.

11. The display panel according to claim 1, wherein: It also includes an encapsulation layer located on the side of the second refractive index layer away from the substrate. The light-emitting device includes an anode, a light-emitting layer and a cathode stacked in sequence on the substrate, and the first refractive index layer is located between the cathode and the second refractive index layer.

12. The display panel according to claim 11, wherein: The material of the first refractive index layer includes polyimide, and the material of the second refractive index layer includes SiNx.

13. The display panel according to claim 1, wherein: An encapsulation layer is also included between the light emitting device and the first refractive index layer.

14. The display panel according to claim 13, wherein: The invention further comprises: a touch structure located between the encapsulation layer and the second refractive index layer, and a flat layer located between the touch structure and the second refractive index layer; the flat layer is reused as the first refractive index layer.

15. The display panel according to claim 14, wherein: The touch structure includes a stacked first touch electrode layer, a touch insulating layer, and a second touch electrode layer. The first touch electrode layer is close to the substrate, and the first refractive index layer is arranged on a side of the second touch electrode layer away from the substrate.

16. The display panel according to claim 15, wherein: The first touch electrode layer and the second touch electrode layer include multiple metal grids, the metal grids include multiple metal wires, the multiple metal wires are staggered to define meshes of the metal grids, the orthographic projections of the metal wires on the substrate are located between adjacent light-emitting devices, and the first refractive index layer covers the metal wires.

17. The display panel according to claim 13, wherein: The material of the first refractive index layer includes resin, and the material of the second refractive index layer includes resin mixed with acrylic particles or acrylic material.

18. The display panel according to claim 2, wherein: The light emitting devices include a red light emitting device, a green light emitting device and a blue light emitting device, and the light emitting device with the largest light emitting area is the blue light emitting device.

19. The display panel according to claim 1, wherein: An orthographic projection area of ​​the opening region on the substrate is greater than or equal to an orthographic projection area of ​​an effective light emitting region of the light emitting device on the substrate.

20. A display device, wherein: The display panel comprises the display panel according to any one of claims 1 to 19.

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