OLED Device and Display Device

Abstract

An embodiment of the present application provides an OLED device and a display device. The OLED device includes a substrate, an OLED unit disposed on the substrate, and a packaging film covering the OLED unit. The OLED unit includes a plurality of light-emitting elements, and the plurality of light-emitting elements include at least one red light-emitting element, at least one green light-emitting element, and at least one blue light-emitting element. The packaging film includes an organic film layer and at least two inorganic film layers. Each film layer is configured by thickness and refractive index so that the color shift locus of the white light image quality of the OLED device extends in the cyan direction during the process of increasing the viewing angle. Thereby, the colors visually observed by the user are always maintained in the cool color system, reducing the color system change, and thus improving the visual effect. In addition, both cyan and white belong to the cool color system, and the extension of the color shift locus in the cyan direction will not cause obvious discomfort to the user, and the user can obtain a better visual experience.

Description

Technical Field

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

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] OLED (Organic Light-Emitting Diode) devices have become highly competitive and promising next-generation display devices due to their all-solid-state structure, high brightness, full viewing angle, fast response speed, and flexible display. In related technologies, the display effect of white images of OLED devices will change as the user's viewing angle increases. The main reason is that the brightness attenuation of R (red), G (green), and B (blue) monochrome is inconsistent with the change of viewing angle. In addition, the EL spectrum will also change with the viewing angle, thus causing the synthetic white light components to change, which is manifested as a change in the color system of the white light image quality.

[0004] For existing OLED devices, as the user's viewing angle increases (0° to 90°), the color shift trajectory of the white light will first extend in the bluish direction, then turn back to the whitish direction, and then extend in the yellowish direction. In other words, the color scheme changes a lot, which leads to poor visual effects for users and affects the user experience. Summary of the invention

[0005] The embodiments of the present application provide an OLED device and a display apparatus to solve the problem that the color of the white light image quality of the OLED device changes greatly as the viewing angle increases.

[0006] An embodiment of the first aspect of the present application proposes an OLED device, including a substrate, an OLED unit arranged on the substrate, and an encapsulation film covering the OLED unit, wherein the OLED unit includes a plurality of light-emitting elements, the plurality of light-emitting elements include at least one red light-emitting element, at least one green light-emitting element, and at least one blue light-emitting element, the encapsulation film includes an organic thin film layer and at least two inorganic thin film layers, and each thin film layer is configured with respect to thickness and refractive index so that the color deviation trajectory of the white light image quality of the OLED device extends toward the cyan direction as the viewing angle increases.

[0007] In some embodiments of the present application, the encapsulation film includes: a first inorganic film layer disposed on the OLED unit, the thickness of the first inorganic film layer being 0.9 μm to 1.1 μm, and the refractive index of the first inorganic film layer being 1.73 to 1.76; a second inorganic film layer disposed on the first inorganic film layer, the thickness of the second inorganic film layer being 0.1 μm to 0.2 μm, and the refractive index of the second inorganic film layer being 1.60 to 1.65; an organic film layer disposed on the second inorganic film layer, the thickness of the organic film layer being 8 μm to 10 μm, and the refractive index of the organic film layer being 1.50 to 1.55; a third inorganic film layer disposed on the organic film layer, the thickness of the third inorganic film layer being 0.5 μm to 0.6 μm, and the refractive index of the third inorganic film layer being 1.83 to 1.85.

[0008] In some embodiments of the present application, the thickness of the first inorganic film layer is 0.9 μm to 0.95 μm, and the refractive index of the first inorganic film layer is 1.73; the thickness of the second inorganic film layer is 0.1 μm to 0.15 μm, and the refractive index of the second inorganic film layer is 1.63.

[0009] In some embodiments of the present application, the encapsulation film includes: a first inorganic film layer disposed on the OLED unit, the thickness of the first inorganic film layer being 0.9 μm to 1.0 μm, and the refractive index of the first inorganic film layer being 1.73 to 1.76; a second inorganic film layer disposed on the first inorganic film layer, the thickness of the second inorganic film layer being 0.1 μm to 0.2 μm, and the refractive index of the second inorganic film layer being 1.60 to 1.65; a third inorganic film layer disposed on the second inorganic film layer, the thickness of the third inorganic film layer being 0.1 μm to 0.2 μm, and the refractive index of the third inorganic film layer being 1.45 to 1.50; an organic film layer disposed on the third inorganic film layer, the thickness of the organic film layer being 8 μm to 10 μm, and the refractive index of the organic film layer being 1.50 to 1.55; a fourth inorganic film layer disposed on the organic film layer, the thickness of the fourth inorganic film layer being 0.5 μm to 0.6 μm, and the refractive index of the fourth inorganic film layer being 1.83 to 1.85.

[0010] In some embodiments of the present application, the thickness of the first inorganic film layer is 0.9 μm to 0.95 μm, and the refractive index of the first inorganic film layer is 1.73; the thickness of the second inorganic film layer is 0.1 μm to 0.15 μm, and the refractive index of the second inorganic film layer is 1.63, and the thickness of the third inorganic film layer is 0.1 μm, and the refractive index of the second inorganic film layer is 1.52.

[0011] In some embodiments of the present application, the encapsulation film includes: a first inorganic film layer disposed on the OLED unit, the thickness of the first inorganic film layer being 0.05 μm to 0.1 μm, and the refractive index of the first inorganic film layer being 1.45 to 1.55; a second inorganic film layer disposed on the first inorganic film layer, the thickness of the second inorganic film layer being 0.9 μm to 1.0 μm, and the refractive index of the second inorganic film layer being 1.73 to 1.76; a third inorganic film layer disposed on the second inorganic film layer, the thickness of the third inorganic film layer being 0.1 μm to 0.2 μm, and the refractive index of the third inorganic film layer being 1.60 to 1.65; an organic film layer disposed on the third inorganic film layer, the thickness of the organic film layer being 8 μm to 10 μm, and the refractive index of the organic film layer being 1.50 to 1.55; a fourth inorganic film layer disposed on the organic film layer, the thickness of the fourth inorganic film layer being 0.5 μm to 0.6 μm, and the refractive index of the fourth inorganic film layer being 1.83 to 1.85.

[0012] In some embodiments of the present application, the thickness of the first inorganic film layer is 0.05 μm, and the refractive index of the first inorganic film layer is 1.52; the thickness of the second inorganic film layer is 0.9 μm to 0.95 μm, the refractive index of the second inorganic film layer is 1.73, the thickness of the third inorganic film layer is 0.1 μm to 0.15 μm, and the refractive index of the second inorganic film layer is 1.63.

[0013] In some embodiments of the present application, the OLED unit further includes an optical coupling layer covering a plurality of the light-emitting elements, and the optical coupling layer is made of a CPL material.

[0014] An embodiment of the second aspect of the present application provides a display device including the OLED device in any of the above embodiments.

[0015] According to the OLED device and the display device of the embodiments of the present application, the encapsulation film of the OLED device includes an organic film layer and at least two inorganic film layers. By configuring the thickness and refractive index of each film layer, when the viewing angle increases, the color deviation locus of the white light picture quality of the OLED device extends in the direction of cyan. Thus, the colors visually observed by the user are always maintained in the cool color system, reducing the color system change, thereby improving the visual effect. In addition, since both cyan and white belong to the cool color system, the extension of the color deviation locus in the direction of cyan will not cause obvious discomfort to the user. Compared with the prior art in which the color deviation locus extends to the direction of yellow belonging to the warm color system, the user can obtain a better visual experience. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the following briefly introduces the accompanying drawings required for the description of the embodiments of the present application or the related art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0017] Figure 1 Schematic diagram of the structure of the OLED device according to the first embodiment of the present application;

[0018] Figure 2a Brightness attenuation ratio curve of the blue light-emitting element according to the first embodiment of the present application;

[0019] Figure 2b Color difference offset curve of the blue light-emitting element according to the first embodiment of the present application;

[0020] Figure 3 Schematic diagram of the structure of the OLED device according to the second embodiment of the present application;

[0021] Figure 4a Brightness attenuation ratio curve of the red light-emitting element according to the second embodiment of the present application;

[0022] Figure 4b Color difference offset curve of the red light-emitting element according to the second embodiment of the present application;

[0023] Figure 4c Brightness attenuation ratio curve of the green light-emitting element according to the second embodiment of the present application;

[0024] Figure 4d Color difference offset curve of the green light-emitting element according to the second embodiment of the present application;

[0025] Figure 4e Brightness attenuation ratio curve of the blue light-emitting element according to the second embodiment of the present application;

[0026] Figure 4f Color difference offset curve of the blue light-emitting element according to the second embodiment of the present application;

[0027] Figure 5 Schematic diagram of the structure of the OLED device according to the third embodiment of the present application;

[0028] Figure 6a Brightness attenuation ratio curve of the green light-emitting element according to the third embodiment of the present application;

[0029] Figure 6b Color difference offset curve of the green light-emitting element according to the third embodiment of the present application;

[0030] Figure 7Comparison diagram of color deviation trajectories of white picture quality in each embodiment and the prior art. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0032] As Figure 1 、 Figure 3 and Figure 5 shown, an embodiment of the first aspect of the present application provides an OLED (Organic Light-Emitting Diode) device 10. The OLED device 10 includes a substrate 100, an OLED unit 200 disposed on the substrate 100, and a packaging film 300 covering the OLED unit 200. The OLED unit 200 includes a plurality of light-emitting elements. The plurality of light-emitting elements include at least one red light-emitting element 210, at least one green light-emitting element 220, and at least one blue light-emitting element 230. The packaging film 300 includes an organic film layer and at least two inorganic film layers. By configuring the thickness and refractive index of each film layer, the color deviation trajectory of the white light picture quality of the OLED device 10 extends in the cyan direction as the viewing angle increases.

[0033] For the OLED device 10 according to the embodiment of the present application, its packaging film 300 includes an organic film layer and at least two inorganic film layers. By configuring the thickness and refractive index of each film layer, the color deviation trajectory of the white light picture quality of the OLED device 10 extends in the cyan direction as the viewing angle increases. Thus, the color visually observed by the user is always maintained in the cool color system, reducing the color system change, thereby improving the visual effect. In addition, since both cyan and white belong to the cool color system, the extension of the color deviation trajectory in the cyan direction will not cause obvious discomfort to the user. Compared with the prior art where the color deviation trajectory extends to the yellow direction which belongs to the warm color system, the user can obtain a better visual experience.

[0034] In some embodiments of the present application, as Figure 1As shown, the encapsulation film 300 includes: a first inorganic thin film layer 310 disposed on the OLED unit 200, a second inorganic thin film layer 320 disposed on the first inorganic thin film layer 310, an organic thin film layer 350 disposed on the second inorganic thin film layer 320, and a third inorganic thin film layer 330 disposed on the organic thin film layer 350. Among them, the thickness of the first inorganic thin film layer 310 is 0.9 μm to 1.1 μm, the refractive index of the first inorganic thin film layer 310 is 1.73 to 1.76, the thickness of the second inorganic thin film layer 320 is 0.1 μm to 0.2 μm, the refractive index of the second inorganic thin film layer 320 is 1.60 to 1.65, the thickness of the organic thin film layer 350 is 8 μm to 10 μm, the refractive index of the organic thin film layer 350 is 1.50 to 1.55, the thickness of the third inorganic thin film layer 330 is 0.5 μm to 0.6 μm, and the refractive index of the third inorganic thin film layer 330 is 1.83 to 1.85. Figure 2( Figure 2a and Figure 2b ) shows the brightness attenuation ratio and color difference offset curve of the blue light emitting element 230 in the OLED device 10 in this embodiment. Among them, the abscissa CIEx and the ordinate CIEy are both color coordinates. As can be seen from Figure 2, by using the encapsulation film 300 in this embodiment, the brightness attenuation of the blue light emitting element 230 becomes significantly slower compared to the blue light emitting element in the existing OLED device, and at the same time, the change of its blue light color deviation trajectory becomes narrower. Therefore, the color deviation trajectory of the white light picture quality of the OLED device 10 moves towards the cyan-blue direction after the viewing angle is greater than 45°, so that the color visually observed by the user always remains in the cold color system. Further, the visual effect of the target sample observed at a large viewing angle (greater than or equal to 60°) is cyan-blue.

[0035] In a specific example, the structure of the encapsulation film 300 can be further optimized. Specifically, the thickness of the first inorganic thin film layer 310 is 0.9 μm to 0.95 μm, and the refractive index of the first inorganic thin film layer 310 is 1.73; the thickness of the second inorganic thin film layer 320 is 0.1 μm to 0.15 μm, and the refractive index of the second inorganic thin film layer 320 is 1.63. In this case, a color deviation trajectory with a shorter length and a smaller JNCD (Just Noticeable Color Difference) value can be obtained as Figure 7 shown.

[0036] Further, both the first inorganic thin film layer 310 and the second inorganic thin film layer 320 include a SiNO x film layer.

[0037] In some other embodiments of the present application, as Figure 3As shown in the figure, the encapsulation film 300 includes: a first inorganic thin film layer 310 disposed on the OLED unit 200, a second inorganic thin film layer 320 disposed on the first inorganic thin film layer 310, a third inorganic thin film layer 330 disposed on the second inorganic thin film layer 320, an organic thin film layer 350 disposed on the third inorganic thin film layer 330, and a fourth inorganic thin film layer 340 disposed on the organic thin film layer 350. Among them, the thickness of the first inorganic thin film layer 310 is 0.9 μm to 1.0 μm, the refractive index of the first inorganic thin film layer 310 is 1.73 to 1.76, the thickness of the second inorganic thin film layer 320 is 0.1 μm to 0.2 μm, the refractive index of the second inorganic thin film layer 320 is 1.60 to 1.65, the thickness of the third inorganic thin film layer 330 is 0.1 μm to 0.2 μm, the refractive index of the third inorganic thin film layer 330 is 1.45 to 1.50, the thickness of the organic thin film layer 350 is 8 μm to 10 μm, the refractive index of the organic thin film layer 350 is 1.50 to 1.55, the thickness of the fourth inorganic thin film layer 340 is 0.5 μm to 0.6 μm, and the refractive index of the fourth inorganic thin film layer 340 is 1.83 to 1.85. Figure 4( Figures 4a - 4f ) shows the brightness attenuation ratio and chromatic aberration offset curve of the red light-emitting element 210, green light-emitting element 220, and blue light-emitting element 230 in the OLED device 10 in this embodiment. As can be seen from Figure 4, by using the encapsulation film 300 in this embodiment, the brightness attenuation of the red light-emitting element 210 is significantly faster than that of the red light-emitting element in the existing OLED device. At the same time, the change in the red light color deviation trajectory is large. The brightness attenuation of the green light-emitting element 220 and blue light-emitting element 230 is slightly slower than that of the green light-emitting element and blue light-emitting element in the existing OLED device. At the same time, the color deviation trajectories of green light and blue light are slightly narrowed. Therefore, the color deviation trajectory of the white light picture quality of the OLED device 10 moves in a single cyan direction after the viewing angle is greater than 45°, so that the color visually observed by the user always remains in the cool color system. Furthermore, when viewed at a large viewing angle (greater than or equal to 60°), the visual effect of the target sample appears cyan.

[0038] In a specific example, the structure of the encapsulation film 300 can be further optimized. Specifically, the thickness of the first inorganic thin film layer 310 is 0.9 μm to 0.95 μm, and the refractive index of the first inorganic thin film layer 310 is 1.73; the thickness of the second inorganic thin film layer 320 is 0.1 μm to 0.15 μm, and the refractive index of the second inorganic thin film layer 320 is 1.63. The thickness of the third inorganic thin film layer 330 is 0.1 μm, and the refractive index of the second inorganic thin film layer 320 is 1.52. In this case, a color deviation trajectory with a shorter length and a smaller JNCD value can be obtained as Figure 7 shown.

[0039] Further, both the first inorganic thin film layer 310 and the second inorganic thin film layer 320 include a SiNO x film layer, and the third inorganic thin film layer 330 includes a SiO x film layer.

[0040] In some other embodiments of the present application, as Figure 5 shown, the encapsulation thin film 300 includes: a first inorganic thin film layer 310 disposed on the OLED unit 200, a second inorganic thin film layer 320 disposed on the first inorganic thin film layer 310, a third inorganic thin film layer 330 disposed on the second inorganic thin film layer 320, an organic thin film layer 350 disposed on the third inorganic thin film layer 330, and a fourth inorganic thin film layer 340 disposed on the organic thin film layer 350. Among them, the thickness of the first inorganic thin film layer 310 is 0.05 μm to 0.1 μm, the refractive index of the first inorganic thin film layer 310 is 1.45 to 1.55, the thickness of the second inorganic thin film layer 320 is 0.9 μm to 1.0 μm, the refractive index of the second inorganic thin film layer 320 is 1.73 to 1.76, the thickness of the third inorganic thin film layer 330 is 0.1 μm to 0.2 μm, the refractive index of the third inorganic thin film layer 330 is 1.60 to 1.65, the thickness of the organic thin film layer 350 is 8 μm to 10 μm, the refractive index of the organic thin film layer 350 is 1.50 to 1.55, the thickness of the fourth inorganic thin film layer 340 is 0.5 μm to 0.6 μm, and the refractive index of the fourth inorganic thin film layer 340 is 1.83 to 1.85. FIG. 6( Figure 6a and Figure 6b ) shows the brightness attenuation ratio and chromatic aberration offset curve of the green light-emitting element 220 in the OLED device 10 in this embodiment. As can be seen from FIG. 6, by using the encapsulation thin film 300 in this embodiment, the brightness attenuation of the green light-emitting element 220 becomes significantly slower compared to the green light-emitting element in the existing OLED device, and at the same time, the change in the green light color deviation trajectory is more narrowed. Therefore, the color deviation trajectory of the white light picture quality of the OLED device 10 moves towards the cyan-green direction after the viewing angle is greater than 45°, so that the color visually observed by the user always remains in the cool color system. Further, at a large viewing angle (greater than or equal to 60°), the visual effect of the target sample observed is cyan-green.

[0041] In a specific example, the structure of the encapsulation thin film 300 can be further optimized. Specifically, the thickness of the first inorganic thin film layer 310 is 0.05 μm, and the refractive index of the first inorganic thin film layer 310 is 1.52; the thickness of the second inorganic thin film layer 320 is 0.9 μm to 0.95 μm, the refractive index of the second inorganic thin film layer 320 is 1.73, the thickness of the third inorganic thin film layer 330 is 0.1 μm to 0.15 μm, and the refractive index of the second inorganic thin film layer 320 is 1.63. In this case, the following can be obtained as Figure 7The shown color shift locus has a shorter length and a smaller JNCD value.

[0042] Further, the first inorganic thin film layer 310 includes a SiO x film layer, and both the second inorganic thin film layer 320 and the third inorganic thin film layer 330 include SiNO x film layers.

[0043] In some embodiments of the present application, the OLED unit 200 further includes an optical coupling layer 240 covering a plurality of light-emitting elements, and the optical coupling layer 240 is made of a CPL material. The optical coupling layer 240 made of a CPL material can increase the light output of the light-emitting elements and the light-emitting efficiency of the OLED unit 200. Compared with the existing structure of the optical coupling layer including a CPL material layer and a LiF layer, the optical coupling layer 240 in this embodiment, in cooperation with the encapsulation film 300 in the above embodiment, can better improve the color shift locus of the white light image quality.

[0044] An embodiment of the second aspect of the present application provides a display device, which includes the OLED device 10 in any of the above embodiments.

[0045] According to the display device of the embodiments of the present application, the encapsulation film 300 of the OLED device 10 includes an organic thin film layer and at least two inorganic thin film layers. By configuring the thickness and refractive index of each thin film layer, the color shift locus of the white light image quality of the OLED device 10 extends in the cyan direction during the process of increasing the viewing angle. Thereby, the colors visually observed by the user are always maintained in the cool color system, reducing the color system change, and thus improving the visual effect. In addition, since both cyan and white belong to the cool color system, the extension of the color shift locus in the cyan direction will not cause obvious discomfort to the user. Compared with the prior art in which the color shift locus extends to the yellow direction belonging to the warm color system, the user can obtain a better visual experience.

[0046] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0047] Each embodiment in this specification is described in a related manner. For the same or similar parts among the embodiments, reference can be made to each other, and the differences between each embodiment and other embodiments are emphasized.

[0048] The above description is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are all included in the protection scope of the present application.

Claims

1. An OLED device, characterized in that, It includes a substrate, an OLED unit disposed on the substrate, and a packaging film covering the OLED unit. The OLED unit includes a plurality of light-emitting elements, and the plurality of light-emitting elements include at least one red light-emitting element, at least one green light-emitting element, and at least one blue light-emitting element. The packaging film includes an organic film layer and at least two inorganic film layers. Each film layer is configured by thickness and refractive index so that the color shift locus of the white light image quality of the OLED device extends towards the cyan direction during the process of increasing the viewing angle; The packaging film includes: A first inorganic film layer disposed on the OLED unit, the thickness of the first inorganic film layer is 0.9 μm to 1.1 μm, and the refractive index of the first inorganic film layer is 1.73 to 1.76; A second inorganic film layer disposed on the first inorganic film layer, the thickness of the second inorganic film layer is 0.1 μm to 0.2 μm, and the refractive index of the second inorganic film layer is 1.60 to 1.65; An organic film layer disposed on the second inorganic film layer, the thickness of the organic film layer is 8 μm to 10 μm, and the refractive index of the organic film layer is 1.50 to 1.55; A third inorganic film layer disposed on the organic film layer, the thickness of the third inorganic film layer is 0.5 μm to 0.6 μm, and the refractive index of the third inorganic film layer is 1.83 to 1.85; Both the first inorganic film layer and the second inorganic film layer include a SiNOx film layer.

2. The OLED device according to claim 1, wherein The thickness of the first inorganic film layer is 0.9 μm to 0.95 μm, and the refractive index of the first inorganic film layer is 1.73; the thickness of the second inorganic film layer is 0.1 μm to 0.15 μm, and the refractive index of the second inorganic film layer is 1.

63.

3. An OLED device, characterized in that, It includes a substrate, an OLED unit disposed on the substrate, and a packaging film covering the OLED unit. The OLED unit includes a plurality of light-emitting elements, and the plurality of light-emitting elements include at least one red light-emitting element, at least one green light-emitting element, and at least one blue light-emitting element. The packaging film includes an organic film layer and at least two inorganic film layers. Each film layer is configured by thickness and refractive index so that the color shift locus of the white light image quality of the OLED device extends towards the cyan direction during the process of increasing the viewing angle; The packaging film includes: A first inorganic film layer disposed on the OLED unit, the thickness of the first inorganic film layer is 0.9 μm to 1.0 μm, and the refractive index of the first inorganic film layer is 1.73 to 1.76; A second inorganic film layer disposed on the first inorganic film layer, the thickness of the second inorganic film layer is 0.1 μm to 0.2 μm, and the refractive index of the second inorganic film layer is 1.60 to 1.65; A third inorganic film layer disposed on the second inorganic film layer, the thickness of the third inorganic film layer is 0.1 μm to 0.2 μm, and the refractive index of the third inorganic film layer is 1.45 to 1.50; An organic thin film layer disposed on the third inorganic thin film layer, the thickness of the organic thin film layer being 8 μm to 10 μm, and the refractive index of the organic thin film layer being 1.50 to 1.55; A fourth inorganic thin film layer disposed on the organic thin film layer, the thickness of the fourth inorganic thin film layer being 0.5 μm to 0.6 μm, and the refractive index of the fourth inorganic thin film layer being 1.83 to 1.85; Both the first inorganic thin film layer and the second inorganic thin film layer include a SiNOx film layer, and the third inorganic thin film layer includes a SiOx film layer.

4. The OLED device according to claim 3, wherein, The thickness of the first inorganic thin film layer is 0.9 μm to 0.95 μm, and the refractive index of the first inorganic thin film layer is 1.73; the thickness of the second inorganic thin film layer is 0.1 μm to 0.15 μm, and the refractive index of the second inorganic thin film layer is 1.

63. The thickness of the third inorganic thin film layer is 0.1 μm, and the refractive index of the second inorganic thin film layer is 1.

52.

5. An OLED device, characterized in that, Including a substrate, an OLED unit disposed on the substrate, and a packaging film covering the OLED unit. The OLED unit includes a plurality of light-emitting elements, and the plurality of light-emitting elements include at least one red light-emitting element, at least one green light-emitting element, and at least one blue light-emitting element. The packaging film includes an organic thin film layer and at least two inorganic thin film layers. By configuring the thickness and refractive index of each thin film layer, the color shift locus of the white light image quality of the OLED device extends in the cyan direction during the process of increasing the viewing angle; The packaging film includes: A first inorganic thin film layer disposed on the OLED unit, the thickness of the first inorganic thin film layer being 0.05 μm to 0.1 μm, and the refractive index of the first inorganic thin film layer being 1.45 to 1.55; A second inorganic thin film layer disposed on the first inorganic thin film layer, the thickness of the second inorganic thin film layer being 0.9 μm to 1.0 μm, and the refractive index of the second inorganic thin film layer being 1.73 to 1.76; A third inorganic thin film layer disposed on the second inorganic thin film layer, the thickness of the third inorganic thin film layer being 0.1 μm to 0.2 μm, and the refractive index of the third inorganic thin film layer being 1.60 to 1.65; An organic thin film layer disposed on the third inorganic thin film layer, the thickness of the organic thin film layer being 8 μm to 10 μm, and the refractive index of the organic thin film layer being 1.50 to 1.55; A fourth inorganic thin film layer disposed on the organic thin film layer, the thickness of the fourth inorganic thin film layer being 0.5 μm to 0.6 μm, and the refractive index of the fourth inorganic thin film layer being 1.83 to 1.85; The first inorganic thin film layer includes a SiOx film layer, and both the second inorganic thin film layer and the third inorganic thin film layer include a SiNOx film layer.

6. The OLED device according to claim 5, wherein, The thickness of the first inorganic thin film layer is 0.05 μm, and the refractive index of the first inorganic thin film layer is 1.52; the thickness of the second inorganic thin film layer is 0.9 μm to 0.95 μm, the refractive index of the second inorganic thin film layer is 1.73, the thickness of the third inorganic thin film layer is 0.1 μm to 0.15 μm, and the refractive index of the second inorganic thin film layer is 1.

63.

7. The OLED device according to any one of claims 1 to 6, characterized in that, The OLED unit further includes a light coupling layer covering the plurality of light-emitting elements, and the light coupling layer is made of a CPL material.

8. A display device, characterized in that, An OLED device including the same according to any one of claims 1 to 7.

Images