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 with different light-emitting areas, the light-emitting devices being located on the substrate; a first refractive index layer, comprising a plurality of opening areas corresponding to the plurality of light-emitting devices and separators surrounding the opening areas, the projections of the opening areas on the substrate at least partially overlapping with the projections of the light-emitting devices on the substrate; wherein the first slope angle of the separators corresponding to at least some of the opening areas is smaller than the second slope angle of the separators corresponding to other opening areas, and / or the height of the separators corresponding to at least some of the opening areas is greater than the height of the separators corresponding to other opening areas; the first refractive index layer is used to reflect light emitted by the light-emitting devices at the side walls of the opening areas; a second refractive index layer is located on the side of the first refractive index layer facing away from the substrate, the second refractive index layer is arranged on the entire surface and fills each opening area, and the refractive index of the second refractive index layer is greater than the refractive index 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 areas corresponding to the plurality of light-emitting devices and separators surrounding the opening areas, wherein the projections of the opening areas on the substrate at least partially overlap with the projections of the light-emitting devices on the substrate; wherein the first slope angle of the separators corresponding to at least some of the opening areas is smaller than the second slope angle of the separators corresponding to other opening areas, and / or the height of the separators corresponding to at least some of the opening areas is greater than the height of the separators corresponding to other opening areas; the first refractive index layer is configured to reflect light emitted by the light-emitting devices at the sidewalls of the opening areas;

[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 direction parallel to the surface of the substrate, the first slope angle corresponding to the light-emitting device with the largest light-emitting area is smaller than the second slope angle corresponding to the light-emitting devices with other light-emitting areas, and / or the height of the separator corresponding to the light-emitting device with the largest light-emitting area is greater than the height of the separator corresponding to the light-emitting devices with other light-emitting areas.

[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 the luminous efficiency of the first sub-pixel area and lower than the luminous efficiency of the second sub-pixel area, the first slope angle corresponding to the opening area corresponding to the third sub-pixel area is smaller than the second slope angle corresponding to the opening areas corresponding to the first sub-pixel area and the second sub-pixel area, and / or the height of the separator corresponding to the opening area corresponding to the third sub-pixel area is greater than the height of the separator corresponding to the opening area corresponding to the first sub-pixel area and the second sub-pixel area.

[0012] Optionally, in the above-mentioned display panel provided by the embodiment of the present disclosure, the first slope angle is 40° to 50°, and the second slope angle is 60° to 70°.

[0013] Optionally, in the above-mentioned display panel provided by the embodiment of the present disclosure, the height of the separator corresponding to at least part of the opening area is 2um to 8um, and the height of the separator corresponding to the other opening areas is 1um to 4um.

[0014] Optionally, in the above-mentioned display panel provided in the embodiment of the present disclosure, when the height of the separator corresponding to at least part of the opening area is greater than the height of the separator corresponding to other opening areas, the separator corresponding to at least part of the opening area is independently set from the separator corresponding to the other adjacent opening areas.

[0015] 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.

[0016] Optionally, the 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 material of the first refractive index layer includes polyimide, and the material of the second refractive index layer includes SiNx.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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.

[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 resin, and the material of the second refractive index layer includes resin mixed with acrylic particles or acrylic material.

[0022] 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.

[0023] 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.

[0024] 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

[0025] Figure 1 A schematic structural diagram of a display panel provided in the related art;

[0026] Figure 2 A schematic structural diagram of another display panel provided in the related art;

[0027] Figure 3 A schematic structural diagram of another display panel provided in the related art;

[0028] Figure 4-Figure 12 A schematic structural diagram of a display panel provided in an embodiment of the present disclosure;

[0029] Figure 13 A schematic diagram of a top view of a display panel provided in an embodiment of the present disclosure;

[0030] Figure 14 A schematic diagram of a top view of a display panel provided in an embodiment of the present disclosure;

[0031] Figure 15 for Figure 3 Schematic diagram of the light emitting device 23 emitting light;

[0032] Figure 16 for Figure 5 Schematic diagram of the light emitting device 23 emitting light;

[0033] Figure 17 for Figure 7 Schematic diagram of the light emitting device 23 emitting light;

[0034] Figure 18 for Figure 9 Schematic diagram of the light emitting device 23 emitting light;

[0035] Figures 19A-19B For production Figure 5 The display panel shown is a schematic diagram after performing each step;

[0036] Figure 20A-Figure 20B For production Figure 7 The display panel shown is a schematic diagram after performing each step;

[0037] Figures 21A-21D For production Figure 7 The display panel shown is a schematic diagram after performing each step. DETAILED DESCRIPTION

[0038] 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.

[0039] The shapes and sizes of the components in the drawings do not reflect the true proportions, and are only intended to illustrate the present disclosure.

[0040] In traditional OLEDs, such as Figure 1As 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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 9 Shown, including:

[0045] Base 1;

[0046] 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;

[0047] 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) and a separator 34 surrounding the opening areas (31, 32, 33), wherein the projection of the opening area (for example, 31) on the substrate 1 at least partially overlaps with the projection of the light-emitting device 21 on the substrate 1; wherein the first slope angle θ1 of the separator 34 corresponding to at least some of the opening areas (for example, 33) is smaller than the second slope angle θ2 of the separator 34 corresponding to the other opening areas (for example, 31 and 32), and / or the height h1 of the separator 34 corresponding to at least some of the opening areas (for example, 33) is greater than the heights (h2 and h3) of the separator 34 corresponding to the other opening areas (for example, 31 and 32); specifically, as Figure 4 and Figure 5 As shown, the first slope angle θ1 of the separator 34 corresponding to at least part of the opening area (such as 33) is smaller than the second slope angle θ2 of the separator 34 corresponding to other opening areas (such as 31 and 32); Figure 6 and Figure 7 As shown, the height h1 of the separator 34 corresponding to at least some of the opening areas (such as 33) is greater than the heights (h2 and h3) of the separator 34 corresponding to other opening areas (such as 31 and 32); Figure 8 and Figure 9 As shown, the first slope angle θ1 of the separator 34 corresponding to at least part of the opening area (for example, 33) is smaller than the second slope angle θ2 of the separator 34 corresponding to other opening areas (for example, 31 and 32), and the height h1 of the separator 34 corresponding to at least part of the opening area (for example, 33) is greater than the heights (h2 and h3) of the separator 34 corresponding to other opening areas (for example, 31 and 32); the first refractive index layer 3 is used to reflect light emitted by the light-emitting devices (21, 22, 23) at the sidewall 331 of the opening area (for example, 33);

[0048] 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.

[0049] In the 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 areas (31, 32, 33), and the first refractive index layer 3 is a low refractive index layer, the sidewall 331 of the opening area (for example, 33) is the interface where the light emitted by the light emitting device 23 is totally reflected. In the present disclosure, the first slope angle θ1 of the separator 34 corresponding to at least part of the opening area (for example, 33) is smaller than the second slope angle θ2 of the separator 34 corresponding to other opening areas (for example, 31 and 32), so that the light emitting device 23 corresponding to the opening area 33 is completely reflected. The emitted light can still be totally reflected on the side wall 331 to a greater extent, thereby improving the light output gain of the light-emitting device 23 corresponding to the opening area 33; and / or the height h1 of the partition 34 corresponding to at least part of the opening area (for example, 33) is greater than the height (h2 and h3) of the partition 34 corresponding to other opening areas (for example, 31 and 32), so that the light emitted by the light-emitting device 23 corresponding to the opening area 33 can be totally reflected on the side wall 331 to a greater extent, and emitted from the interface of the second refractive index layer 4, thereby improving the light output gain of the light-emitting device 23 corresponding to the opening area 33.

[0050] In specific implementation, in the above display panel provided in the embodiment of the present disclosure, if Figure 4 、 Figure 6 and Figure 8As 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 packaged; 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; wherein 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 it is necessary to manufacture a pixel definition layer (PDL) to define the pixel opening area when manufacturing the display panel, 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 manufactured using a PDL material; specifically, the refractive index of polyimide is 1.65, and the refractive index of SiNx is 1.94.

[0051] It should be noted that the embodiments of the present disclosure Figure 4 、 Figure 6 and Figure 8 The following description uses an example in which the first refractive index layer 3 is made of a PDL material (polyimide) and the second refractive index layer 4 is made of SiNx, which facilitates fabrication. Of course, in practice, the first refractive index layer 3 and the second refractive index layer 4 may also be made of other different materials, as long as the refractive index of the second refractive index layer 4 is greater than that of the first refractive index layer 3.

[0052] In specific implementation, in the above display panel provided in the embodiment of the present disclosure, if Figure 5 、 Figure 7 and Figure 9 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.

[0053] In specific implementation, in the above display panel provided in the embodiment of the present disclosure, if Figure 10-12 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.

[0054] In specific implementation, in the above display panel provided in the embodiment of the present disclosure, if Figure 10-12 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 drive electrode, and the other is a sensing electrode.

[0055] In specific implementation, in the above display panel provided in the embodiment of the present disclosure, if Figure 13 As shown, Figure 13 for Figure 10-12 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.

[0056] In specific implementation, in the above display panel provided in the embodiment of the present disclosure, if Figure 5 、 Figure 7 、 Figure 9 、 Figure 10-12 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 alone. Specifically, the refractive index of the resin is 1.51, and the refractive index of the resin mixed with acrylic particles is 1.71.

[0057] 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 12 As 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 .

[0058] 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 14 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 12As 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.

[0059] 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 4-12 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.

[0060] In specific implementation, Figure 5 、 Figure 7 and Figure 9 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 (resin) is 1.71, and the refractive index n2 of the second refractive index layer 4 (resin mixed with acrylic particles) is 1.71. Figure 15 As shown, Figure 15 In the existing technology Figure 3 In the cross-sectional diagram of pixel B shown in FIG, the refractive index of air is n0=1.0, the critical angle of total reflection of the light emitted by the light emitting device 23 (such as the light L in the center area of ​​pixel B) at the side 331 is arcsin n1 / n2=62°, and when the light enters the air from the second refractive index layer 4, the critical angle of total reflection is arcsin n0 / n2=35.8°. Figure 15 It can be seen that when the slope angle of the B pixel microprism 40 is large, some light rays do not reach the critical angle of total internal reflection (arcsin n1 / n2=62°) when reaching the microprism 40. After being refracted, they reach the interface between the high refractive index flat layer 50 and the air, and undergo total internal reflection again, which reduces the light extraction efficiency. Therefore, in the above-mentioned display panel provided by the embodiment of the present disclosure, if Figure 16 As shown, in the direction parallel to the surface of the substrate 1, the first slope angle θ1 corresponding to the light-emitting device 23 with the largest light-emitting area is smaller than the second slope angle θ2 corresponding to the light-emitting devices (21 and 22) with other light-emitting areas. After the first slope angle θ1 of the first refractive index layer 3 corresponding to the light-emitting device 23 is adjusted, more light emitted by the light-emitting device 23 is totally reflected when reaching the prism surface and emitted from the interface of the second refractive index layer 4, thereby improving the light output gain of the light-emitting device 23. Figure 17 As shown, the height h1 of the separator 34 corresponding to the light-emitting device 23 with the largest light-emitting area is greater than the height h2 of the separator corresponding to the light-emitting devices (21 and 22) with other light-emitting areas. Since the thickness of the separator 34 corresponding to the light-emitting device 23 is larger, more light emitted by the light-emitting device 23 corresponding to the opening area 33 can be totally reflected at the side wall 331 and emitted from the interface of the second refractive index layer 4, thereby improving the light output gain of the light-emitting device 23 corresponding to the opening area 33; Figure 18 As shown, in the direction parallel to the surface of the substrate 1, the first slope angle θ1 corresponding to the light-emitting device 23 with the largest light-emitting area is smaller than the second slope angle θ2 corresponding to the light-emitting devices (21 and 22) with other light-emitting areas, and the height h1 of the separator 34 corresponding to the light-emitting device 23 with the largest light-emitting area is greater than the height h2 of the separator corresponding to the light-emitting devices (21 and 22) with other light-emitting areas, which can further improve the light output gain of the light-emitting device 23 corresponding to the opening area 33.

[0061] 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,

[0062] 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 first slope angle θ1 corresponding to the opening region 33 corresponding to the third sub-pixel region B is smaller than the second slope angle θ2 corresponding to the opening regions (21, 22) corresponding to the first sub-pixel region R and the second sub-pixel region G, and / or the height h1 of the separator 34 corresponding to the opening region 23 corresponding to the third sub-pixel region B is greater than the height of the separator 34 corresponding to the opening regions (21, 22) corresponding to the first sub-pixel region R and the second sub-pixel region G. In this way, more light emitted by the light-emitting device 23 corresponding to the third sub-pixel region B can be totally reflected by the sidewall 331 and emitted from the interface of the second refractive index layer 4, thereby improving the light output gain of the light-emitting device 23 corresponding to the third sub-pixel region B.

[0063] In specific implementation, in the above display panel provided in the embodiment of the present disclosure, if Figure 4 、 Figure 5 、 Figure 8 and Figure 9 As shown, the first slope angle is 40° to 50°, and the second slope angle is 60° to 70°.

[0064] In specific implementation, in the above display panel provided in the embodiment of the present disclosure, if Figure 6 、 Figure 7 、 Figure 8 and Figure 9As shown, the height h1 of the separator 34 corresponding to at least part of the opening area (23) is 2um to 8um, preferably 4um, and the height h2 of the separator 34 corresponding to other opening areas (21, 22) is 1um to 4um, preferably 2um.

[0065] In specific implementation, in the above display panel provided in the embodiment of the present disclosure, if Figure 6 、 Figure 7 、 Figure 8 and Figure 9 As shown, when the height h1 of the separator 34 corresponding to at least part of the opening area (23) is greater than the height h2 of the separator 34 corresponding to other opening areas (21, 22), the separator 34 corresponding to at least part of the opening area (23) is set independently from the separator 34 corresponding to other adjacent opening areas (such as 23).

[0066] Below Figure 5 and Figure 7 Taking the display panel shown as an example, the manufacturing method of the first refractive index layer 3 and the second refractive index layer 4 provided by the embodiment of the present disclosure is described:

[0067] preparation Figure 5 The steps of displaying the panel shown are as follows:

[0068] (1) A plurality of light-emitting devices (21, 22, 23) having different light-emitting areas are sequentially prepared on a substrate 1, and an encapsulation layer 5 is prepared on the side of the light-emitting devices (21, 22, 23) facing away from the substrate 1 to encapsulate the light-emitting devices (21, 22, 23), and then a resin material (taking a positive resin material as an example) is coated on the side of the encapsulation layer 5 facing away from the substrate 1 to form a first refractive index film layer 3', and then the first refractive index film layer 3' is exposed using a half-tone mask (HTM mask), wherein the masks at the corresponding positions of the light-emitting devices 21, 22, and 23 are set with high transmittance, and the edge of the high transmittance area of ​​the mask at the corresponding position of the light-emitting device 23 is set with low transmittance, as shown in FIG. Figure 19A shown.

[0069] (2) The first refractive index film layer 3' after exposure is developed, and the second slope angle θ2 corresponding to the light-emitting device 21 and the light-emitting device 22 is controlled to be 60° to 70°, and the first slope angle θ1 corresponding to the light-emitting device 23 is controlled to be 40° to 50°, thereby forming the first refractive index layer 3, as shown in FIG. Figure 19B shown.

[0070] (3) A second refractive index layer 4 is formed on the side of the first refractive index layer 3 facing away from the substrate 1, such as Figure 5 shown.

[0071] preparation Figure 7The steps of displaying the panel shown are as follows:

[0072] (1) A plurality of light-emitting devices (21, 22, 23) with different light-emitting areas are sequentially prepared on a substrate 1, and an encapsulation layer 5 is prepared on the side of the light-emitting device (21, 22, 23) facing away from the substrate 1 to encapsulate the light-emitting device (21, 22, 23), and then a resin material (taking a negative resin material as an example) is coated on the side of the encapsulation layer 5 facing away from the substrate 1 to form a first refractive index film layer 3', the thickness of the first refractive index film layer 3' being the thickness of the preparation Figure 5 The thickness of the first refractive index film layer 3' in the display panel shown is more than twice that of the first refractive index film layer 3', and then the first refractive index film layer 3' is exposed using a half-tone mask (HTM mask), wherein the mask at the positions corresponding to the light-emitting device 21, the light-emitting device 22, and the light-emitting device 23 is opaque, the mask at the corresponding position between the light-emitting device 21 and the light-emitting device 22 adopts a low transmittance setting, the edge of the opaque area at the position corresponding to the light-emitting device 23 adopts a high transmittance setting, and the low transmittance, opaque, and high transmittance settings are adopted between the light-emitting device 22 and the light-emitting device 23 in sequence, as shown in FIG. Figure 20A shown.

[0073] (2) The first refractive index film layer 3' after exposure is developed, and the thickness h2 of the separator 34 corresponding to the light-emitting device 21 and the light-emitting device 22 is controlled to be 2 μm, and the thickness h1 of the separator 34 corresponding to the light-emitting device 23 is controlled to be 4 μm, thereby forming the first refractive index layer 3. Figure 20B shown.

[0074] (3) A second refractive index layer 4 is formed on the side of the first refractive index layer 3 facing away from the substrate 1, such as Figure 7 shown.

[0075] preparation Figure 7 The steps of displaying the panel shown may also be as follows:

[0076] (1) A plurality of light-emitting devices (21, 22, 23) with different light-emitting areas are sequentially prepared on a substrate 1, and an encapsulation layer 5 is prepared on the side of the light-emitting device (21, 22, 23) facing away from the substrate 1 to encapsulate the light-emitting device (21, 22, 23), and then a resin material (taking a negative resin material as an example) is coated on the side of the encapsulation layer 5 facing away from the substrate 1 to form a first refractive index film layer 3'. The thickness of the first refractive index film layer 3' is the same as that of the preparation Figure 5The first refractive index film layer 3' in the display panel shown has the same thickness. The first refractive index film layer 3' is then exposed using a half-tone mask (HTM mask). The mask at the positions corresponding to the light-emitting devices 21 and 22 is opaque. The areas around the opaque mask at the positions corresponding to the light-emitting devices 21 and 22 are set with low transmittance. The area corresponding to the light-emitting device 23 and the surrounding areas are opaque. Figure 21A shown.

[0077] (2) The first refractive index film layer 3' after exposure is developed, and the thickness h2 of the separator 34 corresponding to the light-emitting device 21 and the light-emitting device 22 is controlled to be 2 μm. The first refractive index film layer 3' at the position corresponding to the light-emitting device 23 is developed away, as shown in FIG. Figure 21B shown.

[0078] (3) Based on step (2), a first refractive index film layer 3" is coated, wherein the thickness of the first refractive index film layer 3" is more than twice the thickness of the first refractive index film layer 3', and the first refractive index film layer 3" is exposed using a half-tone mask (HTM mask), wherein the position corresponding to the light-emitting device 23 is opaque, and the edge of the light-emitting device 23 corresponding to the opaque position adopts a low transmittance setting, such as Figure 21C shown.

[0079] (4) The first refractive index film layer 3" after exposure is subjected to a development process, and the thickness h1 of the separator 34 corresponding to the light-emitting device 23 is controlled to be 4 μm. The first refractive index film layer 3" at other positions is developed away to form a first refractive index layer 3, as shown in FIG. Figure 21D shown.

[0080] (5) A second refractive index layer 4 is formed on the side of the first refractive index layer 3 facing away from the substrate 1, such as Figure 7 shown.

[0081] Based on the same disclosed concept, the present disclosure also provides a display device including 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.

[0082] 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.

[0083] 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.

[0084] 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 areas corresponding to the plurality of light-emitting devices and separators surrounding the opening areas, wherein the projections of the opening areas on the substrate at least partially overlap with the projections of the light-emitting devices on the substrate; wherein the first slope angle of the separators corresponding to at least some of the opening areas is smaller than the second slope angle of the separators corresponding to other opening areas, and / or the height of the separators corresponding to at least some of the opening areas is greater than the height of the separators corresponding to other opening areas; the first refractive index layer is configured to reflect light emitted by the light-emitting devices at the sidewalls of the opening areas; 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 the luminous efficiency of the first sub-pixel area and lower than the luminous efficiency of the second sub-pixel area. The third sub-pixel area is a blue sub-pixel area. The first slope angle corresponding to the opening area corresponding to the third sub-pixel area is smaller than the second slope angle corresponding to the opening areas corresponding to the first sub-pixel area and the second sub-pixel area, and / or the height of the separator corresponding to the opening area corresponding to the third sub-pixel area is greater than the height of the separator corresponding to the opening area corresponding to the first sub-pixel area and the second sub-pixel area.

2. The display panel according to claim 1, wherein: In the direction parallel to the surface of the substrate, the first slope angle corresponding to the light-emitting device with the largest light-emitting area is smaller than the second slope angle corresponding to the light-emitting devices with other light-emitting areas, and / or the height of the separator corresponding to the light-emitting device with the largest light-emitting area is greater than the height of the separator corresponding to the light-emitting devices with other light-emitting areas.

3. The display panel according to claim 1, wherein: The first slope angle is 40°~50°, and the second slope angle is 60°~70°.

4. The display panel according to claim 1, wherein: The height of the separator corresponding to at least part of the opening area is 2um-8um, and the height of the separator corresponding to the other opening areas is 1um-4um.

5. The display panel according to claim 1, wherein: When the height of the separator corresponding to at least a portion of the opening area is greater than the height of the separator corresponding to other opening areas, the separator corresponding to at least a portion of the opening area is independently provided from the separators corresponding to the other adjacent opening areas.

6. The display panel according to any one of claims 1 to 5, wherein: Along the thickness direction of the substrate, the cross-sectional shape of the opening area is approximately an inverted trapezoid.

7. The display panel according to any one of claims 1 to 5, wherein: The invention also includes an encapsulation layer located on a side of the second refractive index layer facing away from the substrate. The material of the first refractive index layer includes polyimide, and the material of the second refractive index layer includes SiNx.

8. The display panel according to any one of claims 1 to 5, wherein: An encapsulation layer is also included between the light emitting device and the first refractive index layer.

9. The display panel according to claim 8, 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.

10. The display panel according to claim 9, 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.

11. The display panel according to claim 10, 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.

12. The display panel according to claim 8, 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.

13. 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.

14. The display panel according to any one of claims 1 to 5, wherein: 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.

15. A display device, wherein: The display panel comprises the display panel according to any one of claims 1 to 14.

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