WO2025200033A1 - 显示面板及显示装置 - Google Patents
显示面板及显示装置Info
- Publication number
- WO2025200033A1 WO2025200033A1 PCT/CN2024/085186 CN2024085186W WO2025200033A1 WO 2025200033 A1 WO2025200033 A1 WO 2025200033A1 CN 2024085186 W CN2024085186 W CN 2024085186W WO 2025200033 A1 WO2025200033 A1 WO 2025200033A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- light
- refractive index
- covering layer
- display panel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/873—Encapsulations
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/875—Arrangements for extracting light from the devices
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/875—Arrangements for extracting light from the devices
- H10K59/876—Arrangements for extracting light from the devices comprising a resonant cavity structure, e.g. Bragg reflector pair
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/875—Arrangements for extracting light from the devices
- H10K59/879—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
Definitions
- the present application relates to the field of display technology, and in particular to a display panel and a display device.
- the present application provides a display panel comprising a substrate, a light-emitting device layer, and a thin-film encapsulation layer.
- the light-emitting device layer is disposed on one side of the substrate.
- the thin-film encapsulation layer is disposed on a side of the light-emitting device layer facing away from the substrate.
- a cover layer is disposed between the light-emitting device layer and the thin-film encapsulation layer.
- the cover layer comprises a first cover layer, a second cover layer, and a third cover layer.
- the second cover layer is disposed between the first cover layer and the third cover layer.
- the first cover layer is disposed on a side of the second cover layer closer to the light-emitting device layer.
- the third cover layer is disposed on a side of the second cover layer closer to the thin-film encapsulation layer.
- the refractive index of the second cover layer is greater than the refractive indices of the first and third cover layers.
- the present application provides a display device, which includes the above-mentioned display panel.
- a plurality of cover layers are provided on the light-emitting device layer, and the refractive index of the plurality of cover layers maintains a combination of low refractive index, high refractive index, and low refractive index.
- the matching design of the refractive index of the plurality of cover layers can increase the microcavity effect outside the light-emitting device layer and improve the light extraction efficiency of the light emitted by the light-emitting device layer through the cover layer.
- the matching design of the refractive index of the plurality of cover layers can also improve the light loss caused by the surface plasmon mode, so that a portion of the light confined inside the light-emitting device can be emitted outside the display panel, further improving the light extraction efficiency of the display panel, thereby helping to reduce the power consumption of the display panel.
- FIG1 is a schematic cross-sectional view of a display panel according to some embodiments of the present application.
- FIG. 2 is a partial enlarged schematic diagram of the display panel shown in FIG. 1 .
- FIG. 4 shows the proportions of light emitted by the display panels of some embodiments of the present application and light emitted by the display panels of the comparative example in four modes.
- light-emitting device layer 121, anode layer; 1211, first anode; 1212, second anode; 1213, third anode; 122, light-emitting layer; 1221, first light-emitting unit; 1222, second light-emitting unit; 1223, third light-emitting unit; 123, cathode layer;
- covering layer 131, first covering layer; 132, second covering layer; 133, third covering layer;
- 161 driving circuit layer; 162, pixel definition layer; 162a, pixel opening.
- FIG. 1 is a schematic cross-sectional view of a display panel according to some embodiments of the present application.
- FIG. 2 is a partially enlarged schematic view of the display panel shown in FIG. 1 .
- the substrate 11 may include a hard substrate, including but not limited to a glass substrate.
- the substrate 11 may also include a flexible substrate, including an organic layer, including but not limited to a polyimide layer.
- the light emitting device layer 12 is disposed on one side of the substrate 11.
- the light emitting device layer 12 includes an anode layer 121, a light emitting layer 122, and a cathode layer 123.
- the light emitting layer 122 is disposed between the anode layer 121 and the cathode layer 123.
- the anode layer 121 is located on the side of the light-emitting layer 122 that is closest to the substrate 11.
- the anode layer 121 includes a first anode 1211, a second anode 1212, and a third anode 1213, spaced apart from each other.
- the anode layer 121 may include a first transparent conductive layer, a metal layer, and a second transparent conductive layer stacked in sequence. Therefore, the first anode 1211, the second anode 1212, and the third anode 1213 may each include a first transparent conductive layer, a metal layer, and a second transparent conductive layer stacked in sequence.
- the third light-emitting unit 1223 is disposed on the third anode 1213.
- the first light-emitting unit 1221 may include a blue light-emitting unit
- the second light-emitting unit 1222 may include a red light-emitting unit
- the third light-emitting unit 1223 may include a green light-emitting unit, but the present invention is not limited thereto.
- the thin film encapsulation layer 15 includes a first inorganic encapsulation layer 151 and an organic encapsulation layer 152.
- the first inorganic encapsulation layer 151 is located on a side of the organic encapsulation layer 152 that is close to the light-emitting device layer 12.
- the thin film encapsulation layer 15 also includes a second inorganic encapsulation layer 153.
- the second inorganic encapsulation layer 153 is located on a side of the organic encapsulation layer 152 that is away from the first inorganic encapsulation layer 151.
- the first inorganic encapsulation layer 151 and the second inorganic encapsulation layer 153 have good density, which can better block water vapor and oxygen.
- the organic encapsulation layer 152 is flexible and thick, which can reduce the risk of breakage of the thin film encapsulation layer 15 and extend the intrusion channel of water vapor and oxygen.
- the combination of the organic encapsulation layer 152, the first inorganic encapsulation layer 151, and the second inorganic encapsulation layer 153 makes the thin film encapsulation layer 15 have better barrier properties against water vapor and oxygen, and reduces the risk of breakage of the thin film encapsulation layer 15.
- the refractive index of the first inorganic encapsulation layer 151 and the second inorganic encapsulation layer 153 is greater than or equal to 1.75 and less than or equal to 2.5. In this way, the refractive index of the first inorganic encapsulation layer 151 and the second inorganic encapsulation layer 153 is relatively large. Alternatively, the refractive index of the first inorganic encapsulation layer 151 and the second inorganic encapsulation layer 153 is greater than or equal to 1.8 and less than or equal to 2.2.
- the first and second inorganic encapsulation layers 151 and 153 may be made of the same material.
- the first and second inorganic encapsulation layers 151 and 153 may both include silicon nitride to improve their barrier properties against water vapor and oxygen.
- the second inorganic encapsulation layer 153 which is farther away from the light-emitting device layer 12, has better barrier properties to water vapor and oxygen
- the first inorganic encapsulation layer 151 which is closer to the light-emitting device layer 12 has good barrier properties to water vapor and oxygen
- the refractive index of the first inorganic encapsulation layer 151 can have a wider range of values, so as to facilitate the adjustment of the refractive index of the first inorganic encapsulation layer 151 and thereby improve the light extraction efficiency of the display panel 100 and improve the problem of large viewing angle deviation.
- the mass fraction of oxygen in the first inorganic encapsulation layer 151 is less than or equal to 10%. In this way, the oxygen content in the first inorganic encapsulation layer 151 is relatively low, thereby improving the barrier properties of the first inorganic encapsulation layer 151 to water vapor and oxygen.
- the mass fraction of oxygen in the first inorganic encapsulation layer 151 is less than or equal to 8%.
- the mass fraction of oxygen in the first inorganic encapsulation layer 151 is less than or equal to 5%.
- the mass fraction of oxygen in the first inorganic encapsulation layer 151 is less than or equal to 2%.
- the thickness of the first inorganic encapsulation layer 151 and the second inorganic encapsulation layer 153 is greater than or equal to 1000 nanometers and less than or equal to 5000 nanometers. This ensures that the thickness of the first inorganic encapsulation layer 151 and the second inorganic encapsulation layer 153 is relatively thick, thereby improving their barrier properties to water vapor and oxygen and reducing the risk of them breaking due to excessive thickness.
- the thickness of the first inorganic encapsulation layer 151 and the second inorganic encapsulation layer 153 is greater than or equal to 1500 nanometers and less than or equal to 4000 nanometers.
- the matching design of the different refractive indices of the multi-layer covering layer can also improve the light loss caused by the surface plasma mode, so that a part of the light confined inside the light-emitting device can be emitted to the outside of the display panel 100, further improving the light extraction efficiency of the display panel 100, and thus helping to reduce the power consumption of the display panel 100.
- the distance between the covering layer 13 and the light-emitting device layer 12 is closer, so that the matching design of the refractive index of the multi-layer covering layer can significantly increase the microcavity effect outside the light-emitting device layer 12 and more effectively improve the light loss caused by the surface plasma mode of the light emitted by the light-emitting device layer 12.
- cover layer 13 may include more than three cover layers, for example, five cover layers or seven cover layers.
- the design principle of the cover layer 13 is to alternately arrange a high refractive index cover layer and a low refractive index cover layer on a low refractive index cover layer, with each high refractive index cover layer located between two adjacent low refractive index cover layers.
- the ratio of the refractive index of the first cover layer 131 to the refractive index of the third cover layer 133 is greater than or equal to 0.75 and less than or equal to 1.3. In this way, the refractive index of the first cover layer 131 and the refractive index of the third cover layer 133 tend to be the same, the materials of the first cover layer 131 and the third cover layer 133 can be the same, and the manufacturing processes of the first cover layer 131 and the third cover layer 133 can be the same, simplifying the manufacturing process of the cover layer 13.
- the ratio of the refractive index of the first cover layer 131 to the refractive index of the third cover layer 133 can be greater than or equal to 0.8 and less than or equal to 1.2.
- the ratio of the refractive index of the first cover layer 131 to the refractive index of the third cover layer 133 can be greater than or equal to 0.9 and less than or equal to 1.1.
- the refractive index of the first cover layer 131 and the third cover layer 133 is greater than or equal to 1.2 and less than or equal to 1.6, and the refractive index of the second cover layer 132 is greater than or equal to 1.7 and less than or equal to 2.5.
- the refractive index of the second cover layer 132 can be greater than the refractive indexes of the first cover layer 131 and the third cover layer 133.
- the refractive index of the first cover layer 131 is greater than the refractive index of the cathode layer 123, thereby increasing the amount of light emitted from the cathode layer 123 and incident on the cover layer 13.
- the refractive index of the first cover layer 131 and the third cover layer 133 is greater than or equal to 1.3 and less than or equal to 1.5.
- the refractive index of the second cover layer 132 is greater than or equal to 1.8 and less than or equal to 2.2.
- the thickness of the second cover layer 132 is greater than the sum of the thicknesses of the first cover layer 131 and the second cover layer 132.
- the thicker second cover layer 132 can better enhance the microcavity effect outside the light-emitting device layer 12, further improving the light extraction efficiency of the light-emitting device layer 12 through the multi-layer cover layer 13.
- the cover layer 13 may include an organic material, but is not limited thereto.
- the cover layer 13 may also include an inorganic material.
- the material of the second cover layer 132 is different from the materials of the first cover layer 131 and the third cover layer 133 , so that the refractive index of the second cover layer 132 is greater than the refractive index of the first cover layer 131 and the third cover layer 133 .
- the first cover layer 131 and the third cover layer 133 may be made of the same material.
- the manufacturing process of the first cover layer 131 and the third cover layer 133 may be the same, simplifying the manufacturing process of the cover layer 13.
- the first cover layer 131 and the second cover layer 132 may be made of different materials.
- the low-refractive-index capping layer when the capping layer 13 includes an organic material, the low-refractive-index capping layer, such as the first capping layer 131 and the third capping layer 133, may include a fluorine-containing element or a trifluoromethyl aromatic compound.
- the high-refractive-index capping layer such as the second capping layer 132, may include a conjugated structure of benzoxazole.
- the first to third capping layers 131 to 133 when the first to third capping layers 131 to 133 include an organic material, the first to third capping layers 131 to 133 of the capping layer 13 may be formed using an evaporation process, but is not limited thereto.
- the display panel 100 may further include a light-transmitting protective layer 14, which is disposed between the third cover layer 133 and the thin-film encapsulation layer 15.
- the ratio of the refractive index of the light-transmitting protective layer 14 to the refractive index of the third cover layer 133 is greater than or equal to 0.75 and less than or equal to 1.3.
- the light-transmitting protective layer 14 can protect the cover layer 13.
- the refractive index of the light-transmitting protective layer 14 tends to be the same as the refractive index of the third cover layer 133, so that more light emitted from the cover layer 13 can be incident on the light-transmitting protective layer 14.
- the refractive index of the third cover layer 133 matches the refractive index of the light-transmitting protective layer 14, so as to further improve the transmittance of the light emitted by the light-emitting device layer 12 through the cover layer 13 and the light-transmitting protective layer 14, so as to improve the light extraction efficiency of the light emitted by the display panel 100.
- the ratio of the refractive index of the light-transmitting protective layer 14 to the refractive index of the third covering layer 133 is greater than or equal to 0.8 and less than or equal to 1.2.
- the ratio of the refractive index of the light-transmitting protective layer 14 to the refractive index of the third covering layer 133 is greater than or equal to 0.9 and less than or equal to 1.1.
- the refractive index of the light-transmitting protective layer is greater than or equal to 1.2 and less than or equal to 1.6.
- the refractive index of the third covering layer 133 is similar to that of the light-transmitting protective layer 14 .
- the sum of the thickness of the third cover layer 133 and the thickness of the light-transmitting protective layer 14 is greater than the thickness of the first cover layer 131. In this way, the thickness of the first cover layer 131 is relatively small, which is conducive to improving the light extraction efficiency of the light emitted by the light-emitting device layer 12 through the first cover layer 131.
- the refractive index of the first inorganic encapsulation layer 151 is greater than the refractive index of the light-transmitting protective layer 14. This is beneficial for further enhancing the microcavity effect outside the light-emitting device layer 12 and improving the light extraction efficiency of the light-emitting device layer 12 through the cover layer 13, the light-transmitting protective layer 14, and the thin-film encapsulation layer 15.
- the light-transmitting protective layer 14 includes an alkali metal element and a halogen element. This allows the light-transmitting protective layer 14 and the third cover layer 133 to have similar refractive indices, thereby reducing the manufacturing temperature and the manufacturing process difficulty of the light-transmitting protective layer 14.
- the light-transmitting protective layer 14 may include lithium fluoride.
- the thickness of the first inorganic encapsulation layer 151 is greater than the sum of the thickness of the cover layer 13 and the thickness of the light-transmitting protective layer 14. In this way, the thickness of the first inorganic encapsulation layer 151 is relatively thick, so that the first inorganic encapsulation layer 151 closer to the light-emitting device layer 12 has good barrier properties against water vapor and oxygen.
- the half-width (FWHM) of the blue light emission spectrum of the blue light-emitting unit is greater than or equal to 25 nanometers and less than or equal to 34 nanometers. This results in a narrower FWHM of the blue light emission spectrum of the display panel, enhancing the microcavity effect of the light-emitting device emitting blue light, improving the light extraction efficiency of the blue light, and facilitating reduced power consumption required to emit blue light, thereby reducing the overall power consumption of the display panel 100.
- the half-width (FWHM) of the blue light emission spectrum of the blue light-emitting unit is greater than or equal to 28 nanometers and less than or equal to 32 nanometers.
- the display panel 100 further includes a pixel definition layer 162, which is disposed on a side of the driving circuit layer 161 facing away from the substrate 11.
- the pixel definition layer 162 includes a plurality of pixel openings 162a to define the light-emitting area of the light-emitting device.
- the anode layer 121 is disposed on the driving circuit layer 161.
- the pixel definition layer 162 is disposed on the anode layer 121.
- the plurality of pixel openings 162a expose the first anode 1211, the second anode 1212, and the third anode 1213.
- the first light-emitting unit 1221, the second light-emitting unit 1222, and the third light-emitting unit 1223 are disposed in the plurality of pixel openings 162a.
- the designs of the cover layer 13, the light-transmitting protective layer 14, and the thin-film encapsulation layer 15 match each other, which can enhance the microcavity effect outside the light-emitting device layer 12.
- the first portion of the light namely the first light L1
- the second portion of the light is reflected at the interface between the second cover layer 132 with a high refractive index and the third cover layer 133 with a low refractive index.
- a portion of the reflected light enters the cathode layer 123 and is reflected by the cathode layer 123, then emitted into the air as the second light L2.
- Another portion of the reflected light enters the anode layer 121 and is reflected by the anode layer 121, then emitted into the air as the third light L3.
- the third portion of the light is reflected at the interface between the first inorganic encapsulation layer 151 and the organic encapsulation layer 152.
- a portion of the reflected light enters the cathode layer 123 and is reflected by the cathode layer 123, then emitted as the fourth light L4.
- the first light L1 , the second light L2 , the third light L3 and the fourth light L4 may form multi-beam interference, thereby enhancing the light extraction efficiency of the light emitting device layer 12 .
- Figure 3 shows the blue light emission spectrum of the blue light emitting unit of the display panel of some embodiments of the present application and the blue light emission spectrum of the blue light emitting unit of the display panel of the comparative example.
- the structure of the display panel 100 of some embodiments of the present application is shown in Figure 1.
- the difference between the display panel of the comparative example and the display panel 100 shown in Figure 1 is that the covering layer of the display panel of the comparative example only includes the second covering layer 132, but does not include the first covering layer 131 and the third covering layer 133.
- line 201 in Figure 3 represents the blue light emission spectrum of the blue light emitting unit of the display panel 100 of some embodiments of the present application
- line 202 represents the blue light emission spectrum of the blue light emitting unit of the display panel of the comparative example.
- the half-peak width of the blue light emission spectrum of the blue light emitting unit is 31 nanometers.
- the half-peak width of the blue light emission spectrum of the blue light emitting unit is 35 nanometers. Therefore, the half-peak width of the blue light emission spectrum of the blue light emitting unit of the display panel 100 of some embodiments of the present application is narrower than the half-peak width of the blue light emission spectrum of the blue light emitting unit of the display panel of the comparative example.
- the combination of multiple covering layers with different refractive indices of the display panel of some embodiments of the present application enhances the microcavity effect, thereby increasing the light extraction efficiency of the blue light.
- Figure 4 shows the proportion of light emitted by the display panels of some embodiments of the present application and the light emitted by the display panels of the comparative examples in four modes.
- the structure of the display panel 100 of some embodiments of the present application is shown in Figure 1.
- the difference between the display panel of the comparative example and the display panel shown in Figure 1 is that the covering layer of the display panel of the comparative example only includes the second covering layer, but does not include the first covering layer and the third covering layer.
- the four modes include I_GM, I_OC, I_AL and I_EC. Among them, I_GM is a waveguide mode, I_OC is an air mode, I_AL is an absorption mode, and I_EC is a surface plasma mode.
- the air mode corresponds to the proportion of light emitted by the display panel 100 that is incident on the air.
- the number 312 in Figure 4 is marked with the test results of the display panels of some embodiments of the present application, and the number 311 is marked with the test results of the display panel of the comparative example.
- the light extraction efficiency of the light emitted by the display panel of the comparative example is 24.4%, and the light extraction efficiency of the light emitted by the display panel 100 of some embodiments of the present application is 25.6%.
- the light extraction efficiency of the display panel 100 of some embodiments of the present application is improved, which is conducive to reducing the power consumption of the display panel 100.
- the light emitted by the display panel 100 of some embodiments of the present application has a loss of 16.6% due to the surface plasmon mode I_EC.
- the present application also provides a display device, which includes the above-mentioned display panel 100.
- the display device can be applied to display devices such as smart phones, smart watches, desktop computers, laptops, and televisions.
- a multi-layer covering layer is provided on the light-emitting device layer, and the refractive index of the multi-layer covering layer maintains a combination of low refractive index, high refractive index, and low refractive index.
- the matching design of the refractive index of the multi-layer covering layer can increase the microcavity effect outside the light-emitting device layer and improve the light extraction efficiency of the light emitted by the light-emitting device layer through the covering layer.
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Abstract
本申请提供一种显示面板及显示装置。显示面板包括设置于发光器件层与薄膜封装层之间的覆盖层,覆盖层包括第一覆盖层、第二覆盖层以及第三覆盖层。第二覆盖层位于第一覆盖层与第三覆盖层之间,第一覆盖层靠近发光器件层设置,第三覆盖层靠近薄膜封装层设置,第二覆盖层的折射率大于第一覆盖层和第三覆盖层的折射率。
Description
本申请涉及显示技术领域,尤其涉及一种显示面板及显示装置。
有机发光二极管(organic light-emitting diode,OLED)由于具有能自主发光、工作温度范围宽、响应速度快、视角广、发光效率高、可制作在柔性衬底上、驱动电压及能耗低等优点吸引了全球众多显示厂商的目光,被誉为下一代的显示技术。目前,市场对有机发光二极管显示面板的功耗要求也越来越高。
因此,如何降低有机发光二极管显示面板的功耗是需要解决的技术问题。
本申请提供一种显示面板及显示装置,以提高显示面板和显示装置的出光效率,进而有利于降低显示面板以及显示装置的功耗。
第一方面,本申请提供一种显示面板,显示面板包括基底、发光器件层以及薄膜封装层。发光器件层设置于所述基底的一侧。薄膜封装层设置于所述发光器件层背离所述基底的一侧。覆盖层设置于所述发光器件层与所述薄膜封装层之间。所述覆盖层包括第一覆盖层、第二覆盖层以及第三覆盖层。所述第二覆盖层位于所述第一覆盖层与所述第三覆盖层之间。第一覆盖层位于所述第二覆盖层靠近所述发光器件层的一侧。所述第三覆盖层位于所述第二覆盖层靠近所述薄膜封装层的一侧。所述第二覆盖层的折射率大于所述第一覆盖层和所述第三覆盖层的折射率。
第二方面,本申请提供一种显示装置,所述显示装置包括上述显示面板。
在本申请的一些实施例的显示面板及显示装置中,位于发光器件层与薄膜封装层之间的覆盖层包括第一覆盖层、第二覆盖层以及第三覆盖层。第二覆盖层位于第一覆盖层与第三覆盖层之间。第一覆盖层位于第二覆盖层靠近发光器件层的一侧,第三覆盖层位于第二覆盖层靠近薄膜封装层的一侧,第二覆盖层的折射率大于第一覆盖层和第三覆盖层的折射率。因此,发光器件层上设置有多层覆盖层,且多层覆盖层的折射率保持低折射率、高折射率以及低折射率的搭配。多层覆盖层的折射率的搭配设计,可以增加发光器件层外部的微腔作用,提高发光器件层发出的光穿过覆盖层的出光效率。并且,多层覆盖层的折射率的搭配设计,还可以改善表面等离子体模式造成的光损失,使得一部分局限于发光器件内部的光可以出射至显示面板外,进一步地提高显示面板的出光效率,进而有利于降低显示面板的功耗。
图1为本申请的一些实施例的显示面板的剖面结构示意图。
图2为图1所示显示面板的局部放大示意图。
图3为本申请的一些实施例的显示面板的蓝光发光单元的蓝光发射频谱与对比例的显示面板的蓝光发光单元的蓝光发射频谱。
图4为本申请的一些实施例的显示面板发出的光与对比例的显示面板发出的光在四种模式的占比。
附图标记如下:
100,显示面板;
11,基底;
12,发光器件层;121,阳极层;1211,第一阳极;1212,第二阳极;1213,第三阳极;122,发光层;1221,第一发光单元;1222,第二发光单元;1223,第三发光单元;123,阴极层;
13,覆盖层;131,第一覆盖层;132,第二覆盖层;133,第三覆盖层;
14,透光保护层;
15,薄膜封装层;151,第一无机封装层;152,有机封装层;153,第二无机封装层;
161,驱动电路层;162,像素定义层;162a,像素开口。
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述。显然,所描述的实施例仅仅是本申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
请参照图1和图2所示,图1为本申请的一些实施例的显示面板的剖面结构示意图,图2为图1所示显示面板的局部放大示意图。
显示面板100包括基底11、发光器件层12、薄膜封装层15以及覆盖层13。
基底11可以包括硬质基底,硬质基底包括但不限于玻璃基板。基底11也可以包括柔性基底,柔性基底包括有机层。有机层包括但不限于聚酰亚胺层。
发光器件层12设置于基底11的一侧。发光器件层12包括阳极层121、发光层122以及阴极层123。发光层122设置于阳极层121与阴极层123之间。
阳极层121位于发光层122靠近基底11的一侧。阳极层121包括相互间隔设置的第一阳极1211、第二阳极1212以及第三阳极1213。阳极层121可以包括依次叠置的第一透明导电层、金属层以及第二透明导电层。因此,第一阳极1211、第二阳极1212以及第三阳极1213均可以包括依次叠置的第一透明导电层、金属层以及第二透明导电层。金属具有反射性,使得第一阳极1211、第二阳极1212以及第三阳极1213也能对光起到反射作用。第一透明导电层和第二透明导电层包括氧化铟锡以及氧化铟锌中的至少一种。金属层包括银。
发光层122包括相互间隔设置的第一发光单元1221、第二发光单元1222以及第三发光单元1223。第一发光单元1221、第二发光单元1222以及第三发光单元1223发出的光彼此不同。第一发光单元1221、第二发光单元1222以及第三发光单元1223中的任意一者可以包括一个或多个有机发光层。第一发光单元1221设置于第一阳极1211上。第二发光单元1222设置于第二阳极1212上。第三发光单元1223设置于第三阳极1213上。在一个具体的实施例中,第一发光单元1221可以包括蓝光发光单元,第二发光单元1222可以包括红光发光单元,第三发光单元1223可以包括绿光发光单元,但不限于此。
阴极层123可以包括金属。阴极层123的折射率小于1。例如,阴极层123包括镁银合金。由于阴极层123包括金属,阴极层123也能对光起到反射作用。
第一阳极1211、第一发光单元1221以及阴极层123构成第一发光器件。第二阳极1212、第二发光单元1222以及阴极层123构成第二发光器件。第三阳极1213、第三发光单元1223以及阴极层123构成第三发光器件。因此,第一发光器件、第二发光器件以及第三发光器件共用阴极层123。并且,第一发光器件、第二发光器件以及第三发光器件还可以包括空穴注入层、空穴传输层、电子注入层以及电子传输层等功能层。
需要说明的是,对于发光器件层12的多个发光器件。发光器件发出的光中,只有一部分光能从显示面板100中出射至空气中,另一部分光会因为波导模式、表面等离子体模式以及吸收模式(材料吸收)被局限在发光器件的内部而无法利用。
薄膜封装层15起到阻隔水汽和氧气的作用,降低水汽和氧气对发光器件层12造成侵蚀的风险,有利于提升显示面板100的可靠性,并延长显示面板100的使用寿命。薄膜封装层15设置于发光器件层12背离基底11的一侧。
薄膜封装层15包括第一无机封装层151以及有机封装层152。第一无机封装层151位于有机封装层152靠近发光器件层12的一侧。薄膜封装层15还包括第二无机封装层153。第二无机封装层153位于有机封装层152背离第一无机封装层151的一侧。
第一无机封装层151和第二无机封装层153具有较好的致密性,能更好地阻隔水汽和氧气。有机封装层152具有柔性,且有机封装层152的厚度较厚,能降低薄膜封装层15发生断裂的风险,并延长水汽和氧气的入侵通道。有机封装层152、第一无机封装层151和第二无机封装层153的搭配,使得薄膜封装层15对水汽和氧气具有更好的阻隔性能,并降低薄膜封装层15发生断裂的风险。
在一些实施例中,有机封装层152的厚度大于或等于2微米。如此,使得有机封装层152的厚度较厚,延长水汽和氧气的入侵通道,提高薄膜封装层15对水汽和氧气的阻隔性能。有机封装层152包括聚酰亚胺以及聚丙烯酸酯等有机材料。
在一些实施例中,第一无机封装层151和第二无机封装层153的折射率大于或等于1.75且小于或等于2.5。如此,第一无机封装层151和第二无机封装层153的折射率较大。可选地,第一无机封装层151和第二无机封装层153的折射率大于或等于1.8且小于或等于2.2。
在一些实施例中,第一无机封装层151和第二无机封装层153可以包括氮氧化硅以及氮化硅中的至少一种。氮氧化硅以及氮化硅对水汽和氧气具有良好的阻隔性能,使得第一无机封装层151和第二无机封装层153也具有良好的阻隔性能。第一无机封装层151和第二无机封装层153均可以包括单层或多层。
在一些实施例中,第一无机封装层151和第二无机封装层153的材料可以相同。例如,第一无机封装层151和第二无机封装层153均包括氮化硅,以提高第一无机封装层151和第二无机封装层153对水汽和氧气的阻隔性能。
在另一些实施例中,第一无机封装层151和第二无机封装层153的材料也可以不同。例如,第一无机封装层151包括氮氧化硅,第二无机封装层153包括氮化硅。如此,距离发光器件层12较远的第二无机封装层153对水汽和氧气具有更好的阻隔性,而距离发光器件层12较近的第一无机封装层151对水汽和氧气具有良好的阻隔性,且第一无机封装层151的折射率的取值范围可以更宽,以便于调整第一无机封装层151的折射率进而提高显示面板100的出光率并改善大视角色偏的问题。
在一些实施例中,第一无机封装层151中氧元素的质量占比小于或等于10%。如此,第一无机封装层151中氧元素的含量较小,以提高第一无机封装层151对水汽和氧气的阻隔性。可选地,第一无机封装层151中氧元素的质量占比小于或等于8%。可选地,第一无机封装层151中氧元素的质量占比小于或等于5%。可选地,第一无机封装层151中氧元素的质量占比小于或等于2%。
在一些实施例中,第二无机封装层153中氧元素的质量占比小于第一无机封装层151中氧元素的质量占比。如此,使得第二无机封装层153对水汽和氧气具有更好的阻隔性。
在一些实施例中,第一无机封装层151和第二无机封装层153的厚度大于或等于1000纳米且小于或等于5000纳米。如此,以保证第一无机封装层151和第二无机封装层153的厚度较厚,以提高两者对水汽和氧气的阻隔性能,并且降低两者过厚而断裂的风险。可选地,第一无机封装层151和第二无机封装层153的厚度大于或等于1500纳米且小于或等于4000纳米。
覆盖层13设置于发光器件层12与薄膜封装层15之间。覆盖层13包括第一覆盖层131、第二覆盖层132以及第三覆盖层133。第二覆盖层132位于第一覆盖层131与第三覆盖层133之间。第一覆盖层131位于第二覆盖层132靠近发光器件层12的一侧。第三覆盖层133位于第二覆盖层132靠近薄膜封装层15的一侧。第二覆盖层132的折射率大于第一覆盖层131和第三覆盖层133的折射率。
在本申请的一些实施例中,发光器件层12上设置有多层不同折射率的覆盖层,且多层覆盖层的折射率保持低折射率、高折射率以及低折射率的搭配。多层覆盖层的折射率的搭配设计,可以增加发光器件层12外部的微腔作用,提高发光器件层12发出的光穿过覆盖层13的出光效率。并且,多层覆盖层的不同折射率的搭配设计,还可以改善表面等离子体模式造成的光损失,使得一部分局限于发光器件内部的光可以出射至显示面板100外,进一步地提高显示面板100的出光效率,进而有利于降低显示面板100的功耗。
需要说明的是,不同于显示面板100中的其他膜层,例如薄膜封装层15,覆盖层13与发光器件层12之间的距离更近,使得多层覆盖层的折射率的搭配设计,能明显地增加发光器件层12外部的微腔作用,并更加有效地改善发光器件层12发出的光由于表面等离子体模式造成的光损失。
还需要说明的是,覆盖层13还可以包括三个以上的覆盖层,例如,五个覆盖层或者七个覆盖层。覆盖层13的设计原理为,在一个低折射率覆盖层上,再交替地设置一个高折射率覆盖层以及一个低折射率覆盖层,每个高折射率覆盖层位于相邻两个低折射率覆盖层之间。
在一些实施例中,第一覆盖层131的折射率与第三覆盖层133的折射率的比值大于或等于0.75且小于或等于1.3。如此,第一覆盖层131的折射率与第三覆盖层133的折射率趋于相同,第一覆盖层131和第三覆盖层133的材料可以相同,第一覆盖层131与第三覆盖层133的制造工艺可以相同,简化覆盖层13的制造工艺。可选地,第一覆盖层131的折射率与第三覆盖层133的折射率的比值可以大于或等于0.8且小于或等于1.2。可选地,第一覆盖层131的折射率与第三覆盖层133的折射率的比值可以大于或等于0.9且小于或等于1.1。
在一些实施例中,第一覆盖层131和第三覆盖层133的折射率大于或等于1.2且小于或等于1.6,第二覆盖层132的折射率大于或等于1.7且小于或等于2.5。如此,第二覆盖层132的折射率可以大于第一覆盖层131和第三覆盖层133的折射率。并且,第一覆盖层131的折射率大于阴极层123的折射率,提高从阴极层123出射的光入射至覆盖层13的光量。
可选地,第一覆盖层131和第三覆盖层133的折射率大于或等于1.3且小于或等于1.5。可选地,第二覆盖层132的折射率大于或等于1.8且小于或等于2.2。
在一些实施例中,第二覆盖层132的厚度大于第一覆盖层131的厚度和第三覆盖层133的厚度。如此,第二覆盖层132的厚度更厚,能更好地增加发光器件层12外部的微腔作用,进一步地提高发光器件层12发出的光穿过覆盖层13的出光效率。
在一些实施例中,第二覆盖层132的厚度大于第一覆盖层131与第二覆盖层132的厚度的加和。如此,第二覆盖层132的厚度更厚,能更好地增加发光器件层12外部的微腔作用,进一步地提高发光器件层12发出的光穿过多层覆盖层13的出光效率。
在一些实施例中,第一覆盖层131的厚度与第三覆盖层133的厚度的比值可以大于或等于0.8且小于或等于1.2。如此,第一覆盖层131的厚度与第三覆盖层133的厚度可以趋于相同,第一覆盖层131与第三覆盖层133的制造工艺可以相同,简化覆盖层13的制造工艺。
在一些实施例中,第一覆盖层131的厚度与第三覆盖层133的厚度大于或等于100埃且小于或等于500埃,第二覆盖层132的厚度大于或等于500埃且小于或等于700埃。如此,第二覆盖层132的厚度大于第一覆盖层131的厚度与第三覆盖层133的厚度。可选地,第一覆盖层131的厚度和第三覆盖层133的厚度大于或等于150埃且小于或等于300埃,第二覆盖层132的厚度大于或等于550埃且小于或等于650埃。
在一些实施例中,覆盖层13可以包括有机材料,但不限于此。覆盖层13也可以包括无机材料。
在一些实施例中,第二覆盖层132的材料与第一覆盖层131以及第三覆盖层133的材料不同。如此,使得第二覆盖层132的折射率大于第一覆盖层131以及第三覆盖层133的折射率。
在一些实施例中,第一覆盖层131与第三覆盖层133的材料可以相同。如此,第一覆盖层131与第三覆盖层133的制造工艺可以相同,简化覆盖层13的制造工艺。在另一些实施例中,第一覆盖层131与第二覆盖层132的材料可以不同。
在一些实施例中,在覆盖层13包括有机材料的情况下,对于低折射率的覆盖层,例如,第一覆盖层131和第三覆盖层133,可以包括含氟元素或三氟甲基的芳香族化合物。在一些实施例中,对于高折射率的覆盖层,例如,第二覆盖层132,可以包括苯并噁唑的共轭结构。
在一些实施例中,在第一覆盖层131至第三覆盖层133包括有机材料的情况下,覆盖层13的第一覆盖层131至第三覆盖层133可以采用蒸镀工艺形成,但不限于此。
在一些实施例中,显示面板100还可以包括透光保护层14,透光保护层14设置于第三覆盖层133与薄膜封装层15之间。透光保护层14的折射率与第三覆盖层133的折射率的比值大于或等于0.75且小于或等于1.3。如此,在后续形成薄膜封装层15过程中,透光保护层14可以对覆盖层13起到保护作用。并且,透光保护层14的折射率与第三覆盖层133的折射率趋于相同,从覆盖层13出射的光,能更多入射至透光保护层14中。也就是,第三覆盖层133的折射率与透光保护层14的折射率相匹配,以进一步地提高发光器件层12发出的光穿过覆盖层13和透光保护层14的透过率,以提高显示面板100发出的光的出光效率。
可选地,透光保护层14的折射率与第三覆盖层133的折射率的比值大于或等于0.8且小于或等于1.2。可选地,透光保护层14的折射率与第三覆盖层133的折射率的比值大于或等于0.9且小于或等于1.1。
在一些实施例中,透光保护层的折射率大于或等于1.2且小于或等于1.6。如此,第三覆盖层133的折射率与透光保护层14的折射率趋于相同。
需要说明的是,在相关技术中,覆盖层只有一个膜层时,一般只能通过薄膜封装层的无机封装层,以改善显示面板的大视角色偏问题。在本申请的一些实施例中,覆盖层13中多个低折射率覆盖层以及透光保护层14均为低折射率膜层,对这些低折射率膜层进行调节,可以提高显示面板100的出光效率,还可以改善显示面板100的大视角色偏问题。因此,多个覆盖层13的设计,以及透明保护层的设计,更有利于提高显示面板100的出光效率并改善大视角色偏的问题。
在一些实施例中,第三覆盖层133的厚度与透光保护层14的厚度的加和大于第一覆盖层131的厚度。如此,第一覆盖层131的厚度较小,有利于提高发光器件层12发出的光穿过第一覆盖层131的出光效率。
在一些实施例中,第一无机封装层151的折射率大于透光保护层14的折射率。如此,有利于进一步地增强发光器件层12外部的微腔作用,提高发光器件层12发出的光穿过覆盖层13、透光保护层14以及薄膜封装层15的出光效率。
在一些实施例中,透光保护层14包括碱金属元素和卤素元素。如此,在使得透光保护层14与第三覆盖层133的折射率趋于相同的情况下,还可以降低透光保护层14的制造温度,降低透光保护层14的制造工艺难度。例如,透光保护层14可以包括氟化锂。
在一些实施例中,第一无机封装层151的厚度大于覆盖层13的厚度与透光保护层14的厚度的加和。如此,使得第一无机封装层151的厚度较厚,以使得距离发光器件层12较近的第一无机封装层151对水汽和氧气具有良好的阻隔性。
在一些实施例中,在发光器件层12的第一发光单元1221包括蓝光发光单元的情况下,蓝光发光单元的蓝光发射频谱的半峰宽大于或等于25纳米且小于或等于34纳米。如此,显示面板的蓝光发射频谱的半峰宽较窄,发出蓝光的发光器件的微腔作用增强,提高蓝光的出光效率,有利于降低发出蓝光所需的功耗,进而降低显示面板100的整体功耗。可选地,蓝光发光单元的蓝光发射频谱的半峰宽大于或等于28纳米且小于或等于32纳米。
如图1所示,显示面板100还包括驱动电路层161,驱动电路层16设置于发光器件层12与基底11之间。驱动电路层161包括像素驱动电路,像素驱动电路与发光器件连接,以驱动发光器件发光。像素驱动电路包括可以薄膜晶体管以及电容器。
如图1所示,显示面板100还包括像素定义层162,像素定义层162设置于驱动电路层161背离基底11的一侧。像素定义层162包括多个像素开口162a,以定义发光器件的发光区域。阳极层121设置于驱动电路层161上。像素定义层162设置于阳极层121上。多个像素开口162a暴露第一阳极1211、第二阳极1212以及第三阳极1213。第一发光单元1221、第二发光单元1222以及第三发光单元1223设置于多个像素开口162a中。
如图2所示,本申请的一些实施例的覆盖层13、透光保护层14以及薄膜封装层15的设计相互匹配,可以增加发光器件层12外部的微腔作用。例如,对于从阴极层123出射的光线,光线的第一部分,即第一光线L1,出射至显示面板100之外的空气中。光线的第二部分在高折射率的第二覆盖层132与低折射率的第三覆盖层133之间的界面发生反射,反射后的一部分光入射至阴极层123并经过阴极层123反射后以第二光线L2出射至空气中,反射后的另一部分光入射至阳极层121并经过阳极层121反射后以第三光线L3出射至空气中。光线的第三部分在第一无机封装层151与有机封装层152之间的界面处发生反射,反射后的一部分光入射至阴极层123并经过阴极层123反射后以第四光线L4出射。第一光线L1、第二光线L2、第三光线L3以及第四光线L4之间可以形成多光束干涉,增强发光器件层12发出光线的出光效率。
如图3所示,图3为本申请的一些实施例的显示面板的蓝光发光单元的蓝光发射频谱与对比例的显示面板的蓝光发光单元的蓝光发射频谱。本申请的一些实施例的显示面板100的结构如图1所示。对比例的显示面板与图1所示显示面板100的区别在于,对比例的显示面板的覆盖层只包括第二覆盖层132,而不包括第一覆盖层131和第三覆盖层133。并且,图3中线201表示本申请的一些实施例的显示面板100的蓝光发光单元的蓝光发射频谱,线202表示对比例的显示面板的蓝光发光单元的蓝光发射频谱。
结合图3可知,对于本申请的一些实施例的显示面板100,蓝光发光单元的蓝光发射频谱的半峰宽为31纳米。对于对比例的显示面板的蓝光发光单元的蓝光发射频谱,蓝光发光单元的蓝光发射频谱的半峰宽为35纳米。因此,本申请的一些实施例的显示面板100的蓝光发光单元的蓝光发射频谱的半峰宽,比对比例的显示面板的蓝光发光单元的蓝光发射频谱的半峰宽窄。本申请的一些实施例的显示面板的多个不同折射率的覆盖层的搭配增强了微腔作用,使得蓝光的出光效率变大。
如图4所示,图4为本申请的一些实施例的显示面板发出的光与对比例的显示面板发出的光在四种模式的占比。本申请的一些实施例的显示面板100的结构如图1所示。对比例的显示面板与图1所示显示面板的区别在于,对比例的显示面板的覆盖层只是包括第二覆盖层,而不包括第一覆盖层和第三覆盖层。四种模式包括I_GM、I_OC、I_AL以及I_EC。其中,I_GM为波导模式,I_OC为空气模式,I_AL为吸收模式,I_EC为表面等离子体模式。其中,空气模式对应显示面板100发出的光入射至空气中的占比。图4中标号312标注的是本申请的一些实施例的显示面板的测试结果,标号311标注的是对比例的显示面板的测试结果。
结合图4可知,对比例的显示面板发出的光的出光效率为24.4%,本申请的一些实施例的显示面板100发光的出光效率为25.6%。本申请的一些实施例的显示面板100的出光效率提高,有利于降低显示面板100的功耗。并且,与对比例相比,本申请的一些实施例的显示面板100发光的光由于表面等离子体模式I_EC造成的损失减小了16.6%。因此,本申请的一些实施例的显示面板100由于表面等离子体模式造成的损失得到明显改善,原因与覆盖层13中低折射率覆盖层131能改变阴极层123处的波矢相关。
基于相同的发明构思,本申请还提供一种显示装置,显示装置包括上述显示面板100。显示装置可以应用于智能手机、智能手表、台式电脑、笔记本电脑以及电视等显示设备。
综上,对于上述显示面板和显示装置,发光器件层上设置有多层覆盖层,且多层覆盖层的折射率保持低折射率、高折射率以及低折射率的搭配。多层覆盖层的折射率的搭配设计,可以增加发光器件层外部的微腔作用,提高发光器件层发出的光穿过覆盖层的出光效率。并且,多层覆盖层的折射率的搭配设计,还可以改善表面等离子体模式造成的光损失,使得一部分局限于发光器件内部的光可以出射至显示面板外,进一步地提高显示面板的出光效率,进而有利于降低显示面板的功耗。
以上实施例的说明只是用于帮助理解本申请的技术方案及其核心思想;本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本申请各实施例的技术方案的范围。
Claims (20)
- 一种显示面板,其中,所述显示面板包括:基底;发光器件层,设置于所述基底的一侧;薄膜封装层,设置于所述发光器件层背离所述基底的一侧;以及覆盖层,设置于所述发光器件层与所述薄膜封装层之间,所述覆盖层包括第一覆盖层、第二覆盖层以及第三覆盖层,所述第二覆盖层位于所述第一覆盖层与所述第三覆盖层之间,第一覆盖层位于所述第二覆盖层靠近所述发光器件层的一侧,所述第三覆盖层位于所述第二覆盖层靠近所述薄膜封装层的一侧,所述第二覆盖层的折射率大于所述第一覆盖层和所述第三覆盖层的折射率。
- 根据权利要求1所述的显示面板,其中,所述第一覆盖层的折射率与所述第三覆盖层的折射率的比值大于或等于0.75且小于或等于1.3。
- 根据权利要求1所述的显示面板,其中,所述第一覆盖层和所述第三覆盖层的折射率大于或等于1.2且小于或等于1.6,所述第二覆盖层的折射率大于或等于1.7且小于或等于2.5。
- 根据权利要求1所述的显示面板,其中,所述第二覆盖层的厚度大于所述第一覆盖层的厚度和所述第三覆盖层的厚度。
- 根据权利要求1所述的显示面板,其中,所述显示面板还包括:透光保护层,设置于所述第三覆盖层与所述薄膜封装层之间,所述透光保护层的折射率与所述第三覆盖层的折射率的比值大于或等于0.75且小于或等于1.3。
- 根据权利要求5所述的显示面板,其中,所述第三覆盖层的厚度与所述透光保护层的厚度的加和大于所述第一覆盖层的厚度。
- 根据权利要求5所述的显示面板,其中,所述透光保护层包括碱金属元素和卤素元素。
- 根据权利要求5所述的显示面板,其中,所述薄膜封装层包括:有机封装层;以及无机封装层,位于所述有机封装层与所述覆盖层之间,所述无机封装层的折射率大于所述透光保护层的折射率。
- 根据权利要求8所述的显示面板,其中,所述无机封装层的折射率大于或等于1.75且小于或等于2.5,所述透光保护层的折射率大于或等于1.2且小于或等于1.6。
- 根据权利要求8所述的显示面板,其中,所述无机封装层的厚度大于所述覆盖层的厚度与所述透光保护层的厚度的加和。
- 根据权利要求8所述的显示面板,其中,所述无机封装层中氧元素的质量占比小于或等于10%。
- 根据权利要求1所述的显示面板,其中,所述发光器件层包括蓝光发光单元,所述蓝光发光单元的蓝光发射频谱的半峰宽大于或等于25纳米且小于或等于34纳米。
- 一种显示装置,其中,所述显示装置包括显示面板,所述显示面板包括:基底;发光器件层,设置于所述基底的一侧;薄膜封装层,设置于所述发光器件层背离所述基底的一侧;以及覆盖层,设置于所述发光器件层与所述薄膜封装层之间,所述覆盖层包括第一覆盖层、第二覆盖层以及第三覆盖层,所述第二覆盖层位于所述第一覆盖层与所述第三覆盖层之间,第一覆盖层位于所述第二覆盖层靠近所述发光器件层的一侧,所述第三覆盖层位于所述第二覆盖层靠近所述薄膜封装层的一侧,所述第二覆盖层的折射率大于所述第一覆盖层和所述第三覆盖层的折射率。
- 根据权利要求13所述的显示装置,其中,所述第一覆盖层的折射率与所述第三覆盖层的折射率的比值大于或等于0.75且小于或等于1.3。
- 根据权利要求13所述的显示装置,其中,所述第二覆盖层的厚度大于所述第一覆盖层的厚度和所述第三覆盖层的厚度。
- 根据权利要求13所述的显示装置,其中,所述显示面板还包括:透光保护层,设置于所述第三覆盖层与所述薄膜封装层之间,所述透光保护层的折射率与所述第三覆盖层的折射率的比值大于或等于0.75且小于或等于1.3。
- 根据权利要求16所述的显示装置,其中,所述第三覆盖层的厚度与所述透光保护层的厚度的加和大于所述第一覆盖层的厚度。
- 根据权利要求16所述的显示装置,其中,所述透光保护层包括碱金属元素和卤素元素。
- 根据权利要求16所述的显示装置,其中,所述薄膜封装层包括:有机封装层;以及无机封装层,位于所述有机封装层与所述覆盖层之间,所述无机封装层的折射率大于所述透光保护层的折射率。
- 根据权利要求19所述的显示装置,其中,所述无机封装层的厚度大于所述覆盖层的厚度与所述透光保护层的厚度的加和。
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| CN107170775A (zh) * | 2017-04-12 | 2017-09-15 | 上海天马有机发光显示技术有限公司 | 采用薄膜封装的显示装置 |
| CN111063825A (zh) * | 2019-12-09 | 2020-04-24 | 武汉华星光电半导体显示技术有限公司 | 柔性oled封装结构及其制作方法、显示装置 |
| CN111564571A (zh) * | 2020-05-22 | 2020-08-21 | 京东方科技集团股份有限公司 | Oled显示面板及显示装置 |
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| CN102074568A (zh) * | 2009-11-25 | 2011-05-25 | 三星移动显示器株式会社 | 有机发光二极管显示器 |
| CN107170775A (zh) * | 2017-04-12 | 2017-09-15 | 上海天马有机发光显示技术有限公司 | 采用薄膜封装的显示装置 |
| CN111063825A (zh) * | 2019-12-09 | 2020-04-24 | 武汉华星光电半导体显示技术有限公司 | 柔性oled封装结构及其制作方法、显示装置 |
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