OLED display panel and OLED display device

Abstract

The present application provides an OLED display panel and an OLED display device; the OLED display panel includes a display area and a non-display area, the encapsulation layer includes an organic layer, and the thickness of the portion of the organic layer located in the middle area of ​​the display area is greater than the thickness of the portion of the organic layer located in the edge area of ​​the display area. The present application designs the organic layer in the encapsulation layer so that the thickness of the portion of the organic layer located in the middle area of ​​the display area is greater than the thickness of the portion of the organic layer located in the edge area of ​​the display area, so that there is no need for a light extraction layer, and the light extraction efficiency is improved through the organic layer, thereby reducing the thickness of the OLED display panel. At the same time, by changing the thickness of the organic layer, the difference between the optical path in the middle area of ​​the display area and the optical path in the edge area of ​​the display area is reduced, thereby alleviating or even eliminating the problem of different optical paths of light in different directions of the OLED display device, reducing or even eliminating the color difference in different directions, and avoiding the problem of uneven brightness.

Description

Technical Field

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

[0002] OLED (Organic Light-Emitting Diode) display devices are widely used due to their advantages such as self-luminescence and flexibility. Top-emitting OLED display devices have more advantages than bottom-emitting OLED display devices because they do not affect the circuit design, have a lower operating voltage at the same brightness, a longer device life, and lower power consumption. In OLED display devices, there are two problems: one is that when emitting light, some light with a large incident angle will be totally reflected and cannot be emitted, resulting in reduced light emission efficiency; the other is that top-emitting OLED display devices have a strong microcavity effect. Light emitted in different directions has different microcavity effects due to different optical paths, which can easily cause color difference and lead to poor brightness. Even if the prior art uses a light extraction layer set on the OLED device, the light extraction layer can only solve the problem of reduced light extraction efficiency, but cannot solve the technical problems of color difference and uneven brightness.

[0003] Therefore, the existing OLED display device has a technical problem of uneven brightness of the OLED display device caused by different optical paths of light in different directions. Summary of the invention

[0004] The embodiments of the present application provide an OLED display panel and an OLED display device, which are used to alleviate the technical problem of uneven brightness of an OLED display device caused by different optical paths of light rays in different directions in the existing OLED display device.

[0005] An embodiment of the present application provides an OLED display panel, the OLED display panel comprising:

[0006] substrate;

[0007] A driving circuit layer is arranged on one side of the substrate;

[0008] A light-emitting functional layer is arranged on a side of the driving circuit layer away from the substrate;

[0009] An encapsulation layer is arranged on a side of the light-emitting functional layer away from the driving circuit layer;

[0010] The OLED display panel includes a display area and a non-display area, the encapsulation layer includes an organic layer, and the thickness of the organic layer located in the middle area of ​​the display area is greater than the thickness of the organic layer located in the edge area of ​​the display area.

[0011] In some embodiments, the thickness of the organic layer decreases gradually from a middle area of ​​the display area to an edge area of ​​the display area.

[0012] In some embodiments, the display area includes a light-emitting area and a non-light-emitting area, and a thickness of a portion of the organic layer located in the light-emitting area is greater than a thickness of a portion of the organic layer located in the non-light-emitting area.

[0013] In some embodiments, a thickness of a portion of the organic layer located in a middle region of the light-emitting region is greater than a thickness of a portion of the organic layer located in an edge region of the light-emitting region.

[0014] In some embodiments, the OLED display panel includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel, the shape of the organic layer at the position corresponding to the red sub-pixel is different from the shape of the organic layer at the position corresponding to the green sub-pixel, and the shape of the organic layer at the position corresponding to the green sub-pixel is different from the shape of the organic layer at the position corresponding to the blue sub-pixel.

[0015] In some embodiments, the encapsulation layer also includes a first inorganic layer and a second inorganic layer, the first inorganic layer is arranged between the organic layer and the light-emitting functional layer, the second inorganic layer is arranged on the side of the organic layer away from the first inorganic layer, the thickness of each region of the first inorganic layer is equal, and the thickness of each region of the second inorganic layer is equal.

[0016] In some embodiments, the surface of the organic layer in contact with the first inorganic layer is planar, and the height of the organic layer in the middle area of ​​the light-emitting zone on the side of the organic layer in contact with the second inorganic layer is greater than the height of the organic layer in the edge area of ​​the light-emitting zone.

[0017] In some embodiments, the edge region includes a first edge region and a second edge region located on both sides of the middle region, the thickness of the organic layer decreases from the middle region to the first edge region, and the thickness of the organic layer decreases from the middle region to the second edge region.

[0018] In some embodiments, the edge region includes a third edge region, a fourth edge region, a fifth edge region, and a sixth edge region located around the middle region, the thickness of the organic layer decreases from the middle region to the third edge region, the thickness of the organic layer decreases from the middle region to the fourth edge region, the thickness of the organic layer decreases from the middle region to the fifth edge region, and the thickness of the organic layer decreases from the middle region to the sixth edge region.

[0019] In some embodiments, the refractive index of the first inorganic layer is less than the refractive index of the organic layer, and the refractive index of the organic layer is less than the refractive index of the second inorganic layer.

[0020] In some embodiments, the OLED display panel also includes a protective film, which is disposed on a side of the second inorganic layer away from the organic layer, and the thickness of the protective layer located in the middle area of ​​the light-emitting area is smaller than the thickness of the protective layer located in the edge area of ​​the light-emitting area, and the thickness of the protective layer located in the edge area of ​​the light-emitting area is smaller than the thickness of the protective layer located in the non-light-emitting area.

[0021] In some embodiments, the OLED display panel further includes a protective film, the protective film is disposed on a side of the second inorganic layer away from the organic layer, and thicknesses of various regions of the protective film are equal.

[0022] In some embodiments, the encapsulation layer also includes a first inorganic layer and a second inorganic layer, the first inorganic layer is arranged between the organic layer and the light-emitting functional layer, the second inorganic layer is arranged on the side of the organic layer away from the first inorganic layer, the thickness of each region of the first inorganic layer is equal, the thickness of the second inorganic layer located in the middle region of the light-emitting area is smaller than the thickness of the second inorganic layer located in the edge region of the light-emitting area, and the thickness of the second inorganic layer located in the edge region of the light-emitting area is smaller than the thickness of the second inorganic layer located in the non-light-emitting area.

[0023] Meanwhile, an embodiment of the present application provides an OLED display device, which includes an OLED display panel and an electronic component, wherein the OLED display panel includes:

[0024] substrate;

[0025] A driving circuit layer is arranged on one side of the substrate;

[0026] A light-emitting functional layer is arranged on a side of the driving circuit layer away from the substrate;

[0027] An encapsulation layer is arranged on a side of the light-emitting functional layer away from the driving circuit layer;

[0028] The OLED display panel includes a display area and a non-display area, the encapsulation layer includes an organic layer, and the thickness of the organic layer located in the middle area of ​​the display area is greater than the thickness of the organic layer located in the edge area of ​​the display area.

[0029] Beneficial effects: The present application provides an OLED display panel and an OLED display device; the OLED display panel includes a substrate, a driving circuit layer, a light-emitting functional layer and an encapsulation layer, the driving circuit layer is arranged on one side of the substrate, the light-emitting functional layer is arranged on the side of the driving circuit layer away from the substrate, and the encapsulation layer is arranged on the side of the light-emitting functional layer away from the driving circuit layer, wherein the OLED display panel includes a display area and a non-display area, the encapsulation layer includes an organic layer, and the thickness of the portion of the organic layer located in the middle area of ​​the display area is greater than the thickness of the portion of the organic layer located in the edge area of ​​the display area. The present application designs the organic layer in the encapsulation layer so that the thickness of the portion of the organic layer located in the middle area of ​​the display area is greater than the thickness of the portion of the organic layer located in the edge area of ​​the display area, so that there is no need for a light extraction layer, and the light extraction efficiency is improved through the organic layer, thereby reducing the thickness of the OLED display panel. At the same time, by changing the thickness of the organic layer, the difference between the optical path in the middle area of ​​the display area and the optical path in the edge area of ​​the display area is reduced, thereby alleviating or even eliminating the problem of different optical paths of light in different directions of the OLED display device, reducing or even eliminating the color difference in different directions, and avoiding the problem of uneven brightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0031] Figure 1 This is a first schematic diagram of an OLED display panel provided in an embodiment of the present application.

[0032] Figure 2 A second schematic diagram of an OLED display panel provided in an embodiment of the present application.

[0033] Figure 3 This is a third schematic diagram of the OLED display panel provided in an embodiment of the present application.

[0034] Figure 4 This is a first schematic diagram of a light-emitting area provided in an embodiment of the present application.

[0035] Figure 5 A second schematic diagram of a light-emitting area provided in an embodiment of the present application.

[0036] Figure 6 A schematic diagram of an OLED display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0038] The embodiments of the present application provide an OLED display panel and an OLED display device to alleviate the technical problem that the existing OLED display device has uneven brightness due to different optical paths of light rays in different directions.

[0039] like Figure 1 , Figure 2 As shown, an embodiment of the present application provides an OLED display panel, and the OLED display panel 1 includes:

[0040] Substrate 11;

[0041] A driving circuit layer 12 is disposed on one side of the substrate 11;

[0042] A light-emitting functional layer 13 is disposed on a side of the driving circuit layer 12 away from the substrate 11;

[0043] The encapsulation layer 14 is disposed on a side of the light-emitting functional layer 13 away from the driving circuit layer 12;

[0044] The OLED display panel 1 includes a display area 151 and a non-display area 152 , the encapsulation layer 14 includes an organic layer 142 , and the thickness L1 of the portion of the organic layer 142 located in the middle area of ​​the display area 151 is greater than the thickness L2 of the portion of the organic layer 142 located in the edge area of ​​the display area 151 .

[0045] An embodiment of the present application provides an OLED display panel, which designs the organic layer in the encapsulation layer so that the thickness of the organic layer located in the middle area of ​​the display area is greater than the thickness of the organic layer located in the edge area of ​​the display area. Therefore, there is no need for a light extraction layer, and the light extraction efficiency is improved through the organic layer, thereby reducing the thickness of the OLED display panel. At the same time, by changing the thickness of the organic layer, the difference between the optical path located in the middle area of ​​the display area and the optical path located in the edge area of ​​the display area is reduced, thereby alleviating or even eliminating the problem of different optical paths of light in different directions of the OLED display device, reducing or even eliminating the color difference in different directions, and avoiding the problem of uneven brightness.

[0046] It should be noted that in the embodiments of the present application, the middle area and the edge area refer to the general definition of area division. For example, the display area can be divided into three areas in sequence from the non-display area close to one side to the non-display area close to the other side. The area between the two areas close to the non-display area is the middle area, and the two areas close to the non-display area are the edge areas. As for whether the middle area and the edge area are equally divided, that is, whether the area of ​​the middle area is equal to that of each edge area, it is not limited here. For example, the display area is divided into three areas from left to right, and the middle area can be equal to the area of ​​the edge areas on both sides, but the area of ​​the middle area can also be larger than the area of ​​the edge areas on both sides.

[0047] Specifically, the thickness of the organic layer decreases from the middle area of ​​the display area to the non-display area. That is, by decreasing the thickness of the organic layer from the middle area to the non-display area, the difference between the optical path of the light emitted from a large viewing angle (the light may be emitted from the edge of the non-display area after passing through multiple film layers, so the large viewing angle includes the edge area of ​​the display area and the non-display area) and the optical path of the light in the middle area is reduced, thereby avoiding the problem of uneven brightness caused by the optical path difference of light in different directions.

[0048] Specifically, when determining the edge area of ​​the display area, for large-size display devices, the main problem is that the difference between the optical path of the light on the left and right sides and the optical path of the middle area is too large, resulting in problems such as uneven brightness and color difference in the display device. Therefore, the organic layer can be designed as an arc surface extending from the middle area to both sides, thereby reducing the optical path difference of light in different directions and reducing color difference; while for small-size display devices, the optical path difference between the light on the surrounding areas and the light on the middle area will lead to obvious color difference. Therefore, the organic layer can be designed as a spherical surface extending from the middle area to the surrounding areas, so that the difference between the optical path of the light on the surrounding areas of the OLED display device and the optical path of the light in the middle area of ​​the OLED display device is reduced, thereby alleviating uneven brightness and reducing color difference.

[0049] Specifically, the non-display area can be designed to be an arc surface with the same arc as the display area, or it can be a plane with a thickness smaller than that of the display area, thereby reducing the optical path layer of light in different directions.

[0050] In one embodiment, if Figure 1 As shown, the thickness of the organic layer 142 decreases from the middle area of ​​the display area 151 to the edge area of ​​the display area 151. That is, the display area of ​​the display panel can be made into a curved surface, and the thickness of the organic layer decreases from the middle area to the edge, thereby improving the color difference and brightness unevenness of the display device.

[0051] Designing the organic layer for the entire surface still leads to the problem that the optical path difference of light in different directions of a single pixel or a single sub-pixel is different. Figure 3 As shown, the display area 151 includes a light-emitting area 21 and a non-light-emitting area 22, and the thickness L5 of the portion of the organic layer 142 located in the light-emitting area 21 is greater than the thickness L3 of the portion of the organic layer 142 located in the non-light-emitting area 22. By designing the light-emitting area and the non-light-emitting area, the thickness of the organic layer located in the light-emitting area is greater than the thickness located in the non-light-emitting area, and the optical path difference of light in different directions of each light-emitting area can be reduced, and the color deviation of each light-emitting pixel or light-emitting sub-pixel caused by the optical path difference of light in different directions of each light-emitting area is avoided, thereby improving the technical problems of color difference and uneven brightness of the display device.

[0052] Specifically, the above embodiment describes in detail the arrangement of the organic layer in the light-emitting area and the non-light-emitting area. The light-emitting area generally refers to the light-emitting area of ​​the sub-pixel, so the arrangement of the pixel level is not involved here, but the embodiment of the present application is not limited to this, and the arrangement of the pixel level can also adopt the above arrangement. For example, the thickness of the organic layer corresponding to the pixel position is greater than the thickness of the organic layer located between the pixels, which will not be repeated here.

[0053] Designing the organic layer only for the light-emitting area and the non-light-emitting area still has the problem that the optical path difference of light in different directions of a single sub-pixel is different. Figure 2 As shown, the thickness L5 of the portion of the organic layer 142 located in the middle region of the light emitting area 21 is greater than the thickness L4 of the portion of the organic layer 142 located in the edge region of the light emitting area 21. By making the thickness of the organic layer in the middle region of the light emitting area greater than the thickness of the organic layer in the edge region of the light emitting area, the difference between the optical path of the light in the middle region of the light emitting area and the optical path of the light in the edge region of the light emitting area is reduced, and the brightness and color of the light emitted from a single sub-pixel are the same at all angles, thereby avoiding the problem of uneven brightness or color difference.

[0054] It should be noted that the meanings of the middle area and the edge area in this embodiment can still adopt the specific reference meanings explained in the above embodiments, and will not be repeated here.

[0055] In one embodiment, if Figure 3As shown, the OLED display panel 1 includes a red sub-pixel 231, a green sub-pixel 232, and a blue sub-pixel 233. The shape of the organic layer 142 at the position 211 corresponding to the red sub-pixel 231 is the same as the shape of the organic layer 142 at the position 212 corresponding to the green sub-pixel 232. The shape of the organic layer 142 at the position 212 corresponding to the green sub-pixel 232 is the same as the shape of the organic layer 142 at the position 213 corresponding to the blue sub-pixel 233. When the organic layer is set, a corresponding design is performed for each light-emitting sub-pixel, so that the organic layer of each light-emitting sub-pixel can present a shape in which the thickness decreases from the middle to the two sides, thereby improving the uneven brightness and color difference problems of each light-emitting sub-pixel.

[0056] It should be noted that for the sake of convenience, Figure 3 In the figure, the red light-emitting device, green light-emitting device and blue light-emitting device refer to the red sub-pixel, green sub-pixel and blue sub-pixel respectively, but in reality the red sub-pixel refers to all the film layers that can make the red light-emitting device emit light, the green sub-pixel refers to all the film layers that can make the green light-emitting device emit light, and the blue sub-pixel refers to all the film layers that can make the blue light-emitting device emit light.

[0057] The above embodiment is described in detail by taking the sub-pixels of different colors having the same shape as an example. However, in actual design, considering that some display devices design the light-emitting sub-pixels of different colors to have different shapes and thicknesses in order to increase the light-emitting life and resolution, the organic layer can be designed accordingly according to the light-emitting sub-pixels of different colors.

[0058] In one embodiment, the OLED display panel includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel, and the shape of the organic layer at the position corresponding to the red sub-pixel is different from the shape of the organic layer at the position corresponding to the green sub-pixel, and the shape of the organic layer at the position corresponding to the green sub-pixel is different from the shape of the organic layer at the position corresponding to the blue sub-pixel. That is, for sub-pixels of different shapes and sizes, corresponding designs can be performed, thereby correspondingly improving the uneven brightness and color difference of different sub-pixels.

[0059] In one embodiment, if Figure 2As shown, the encapsulation layer 14 further includes a first inorganic layer 141 and a second inorganic layer 143, wherein the first inorganic layer 141 is disposed between the organic layer 142 and the light-emitting functional layer 13, and the second inorganic layer 143 is disposed on a side of the organic layer 142 away from the first inorganic layer 141, and the thickness of each region of the first inorganic layer 141 is equal, and the thickness of each region of the second inorganic layer 143 is equal. When the encapsulation layer is set, the process of the first inorganic layer and the second inorganic layer is not changed for the setting mode of the first inorganic layer and the second inorganic layer, and the first inorganic layer and the second inorganic layer are formed on the light-emitting functional layer and the organic layer respectively, so as to reduce the process difficulty. Therefore, the second inorganic layer will present a curved surface shape on the organic layer, and the optical path difference of light in different directions is reduced through this structure, so as to avoid the problem of uneven brightness and color difference.

[0060] Specifically, the surface of the organic layer in contact with the first inorganic layer is a plane, and the height of the organic layer in the middle region of the light-emitting region on the side of the organic layer in contact with the second inorganic layer is greater than the height of the organic layer in the edge region of the light-emitting region. That is, when the first inorganic layer is arranged, the first inorganic layer is kept in a plane arrangement, and the organic layer is arranged at different heights by the side away from the first inorganic layer, thereby achieving the thickness setting of different regions of the organic layer.

[0061] The above-mentioned embodiments are described in detail with the surface where the first inorganic layer and the organic layer contact is a plane, but the embodiments of the present application are not limited to this. For example, the surface where the first inorganic layer and the organic layer contact is a curved surface, a groove is formed by the first inorganic layer, and a protrusion is formed by the organic layer. At the same time, the organic layer is formed as a curved surface on the side away from the first inorganic layer, so that the thickness of the organic layer in the middle area of ​​the light-emitting area is greater than the thickness in the edge area of ​​the light-emitting area, and greater than the thickness in the non-light-emitting area.

[0062] When light is emitted from the light-emitting area, the optical path of the light decreases from the middle area to the edge area of ​​the light-emitting area. The organic layer can be set as a curved surface so that the thickness of the organic layer decreases gradually, thereby improving the problems of uneven brightness and color difference caused by the optical path difference of light in different directions.

[0063] In one embodiment, if Figure 3 , Figure 4As shown, the edge region includes a first edge region 214 and a second edge region 216 located on both sides of the middle region 215, the thickness of the organic layer 142 decreases from the middle region 215 to the first edge region 214, and the thickness of the organic layer 142 decreases from the middle region 215 to the second edge region 216. As uneven brightness and color difference are mainly caused by the difference in optical path length between the light on both sides and the light in the middle, by decreasing the thickness of the organic layer from the middle region to the edge regions on both sides, the optical path length of the light increases from the middle region of the light-emitting area to the edge regions on both sides, thereby reducing the optical path length difference of the light in different directions, and avoiding the problem of uneven brightness and color difference.

[0064] In one embodiment, if Figure 3 , Figure 5 As shown, the edge region includes a third edge region 217, a fourth edge region 218, a fifth edge region 219 and a sixth edge region 220 located around the middle region 221, the thickness of the organic layer 142 decreases from the middle region 221 to the third edge region 217, the thickness of the organic layer 142 decreases from the middle region 221 to the fourth edge region 218, the thickness of the organic layer 142 decreases from the middle region 221 to the fifth edge region 219, and the thickness of the organic layer 142 decreases from the middle region 221 to the sixth edge region 220. In view of the difference in optical path between the light in the edge region around the luminous area and the light in the middle region caused by the difference in optical path between the light in the edge region around the luminous area and the light in the middle region, by decreasing the thickness of the organic layer from the middle region to the surrounding edge regions, the optical path of the light increases from the middle region to the surrounding edge regions of the luminous area, thereby reducing the optical path difference of the light in different directions, and avoiding the problem of uneven brightness and color difference.

[0065] In one embodiment, the refractive index of the first inorganic layer is smaller than that of the organic layer, and the refractive index of the organic layer is smaller than that of the second inorganic layer. By increasing the refractive indexes from the first inorganic layer to the second inorganic layer in sequence, the transmittance of light is increased.

[0066] In one embodiment, if Figure 2 As shown, the OLED display panel 1 further includes a protective film 16, and the protective film 16 is disposed on a side of the second inorganic layer 143 away from the organic layer 142. By providing the protective film, the encapsulation layer is protected and the invasion of water and oxygen is blocked.

[0067] In one embodiment, the OLED display panel further comprises a protective film, which is disposed on a side of the second inorganic layer away from the organic layer, and each region of the protective film has an equal thickness. When the protective film is disposed, the thickness of the protective film can be kept consistent, but since the unevenness of the OLED display panel can be eliminated by covering it with protective glass during product molding, the surface of the protective layer of the OLED display panel can be set to be uneven.

[0068] Different thicknesses of different areas of the organic layer in the encapsulation layer may cause the problem of uneven OLED display devices. In one embodiment, the OLED display panel also includes a protective film, which is arranged on the side of the second inorganic layer away from the organic layer, and the thickness of the portion of the protective layer located in the middle area of ​​the light-emitting area is less than the thickness of the portion of the protective layer located in the edge area of ​​the light-emitting area, and the thickness of the portion of the protective layer located in the edge area of ​​the light-emitting area is less than the thickness of the portion of the protective layer located in the non-light-emitting area. By designing the thickness of the protective layer according to the setting of the organic layer, reducing the thickness of the portion of the protective layer located in the middle area of ​​the light-emitting area, or increasing the thickness of the portion of the protective layer located in the edge area of ​​the light-emitting area, the thickness of different areas of the protective layer and the thickness of the corresponding area of ​​the organic layer have an opposite setting mode, so that after the protective film is set, the OLED display panel can remain flat.

[0069] In one embodiment, the surface of the protective film away from the second inorganic layer is a plane. That is, when the protective film is provided, the protective layer is formed on the second inorganic layer, and the side of the protective film away from the second inorganic layer is provided as a plane, so that after the protective film is formed, the OLED display panel has a flat surface.

[0070] Regarding the problem that the thickness of the second inorganic layer is consistent when no protective film is provided, which may cause the OLED display panel to be uneven. In one embodiment, the encapsulation layer further includes a first inorganic layer and a second inorganic layer, the first inorganic layer is provided between the organic layer and the light-emitting functional layer, the second inorganic layer is provided on the side of the organic layer away from the first inorganic layer, the thickness of each region of the first inorganic layer is equal, the thickness of the second inorganic layer located in the middle region of the light-emitting region is less than the thickness of the second inorganic layer located in the edge region of the light-emitting region, and the thickness of the second inorganic layer located in the edge region of the light-emitting region is less than the thickness of the second inorganic layer located in the non-light-emitting region. By reducing the thickness of the second inorganic layer located in the middle region of the light-emitting region, or increasing the thickness of the second inorganic layer located in the edge region of the light-emitting region, the second inorganic layer can reduce the curvature or even eliminate the curvature, so that the second inorganic layer remains flat, and the OLED display panel is flattened.

[0071] Specifically, the surface of the second inorganic layer on the side away from the organic layer can be made into a plane, and the OLED display panel can be kept flat by setting the second inorganic layer into a plane.

[0072] In the OLED display panel provided in the embodiment of the present application, the existing OLED display panel with a light extraction layer cannot solve the problem of uneven brightness and color difference caused by the optical path difference of light in different directions. By designing the organic layer, the organic layer replaces the light extraction layer, and at the same time, the problem of uneven brightness and color difference caused by the optical path difference of light in different directions can be solved. Compared with the OLED display panel in which the thickness of different areas of the light extraction layer is set to be different to solve the problem of uneven brightness and color difference caused by the optical path difference of light in different directions, the present application reduces the thickness of the OLED display panel because it designs the organic layer.

[0073] The above embodiment is described in detail by taking the encapsulation layer structure as the first inorganic layer, the organic layer and the second inorganic layer as an example. However, the embodiments of the present application are not limited thereto. For example, the encapsulation layer structure in some OLED display panels is a multi-layered structure of inorganic layer / organic layer / inorganic layer / organic layer / inorganic layer. Then, the multi-layer organic layer can be designed accordingly, and the inorganic layer can be designed accordingly. Specifically, the design is based on reducing the optical path difference of light in different directions, which will not be repeated here.

[0074] In one embodiment, the transmittance of the organic layer is greater than 90%, and the refractive index of the organic layer is greater than 1.7.

[0075] In one embodiment, the material of the organic layer includes at least one of acrylic resin and epoxy resin.

[0076] In one embodiment, in order to realize the design of the organic layer in the present application, the organic layer can be formed by coating or inkjet printing. Specifically, after the coating or inkjet printing is formed into a film, it can be pre-cured by fluidizing and standing or heating or ultraviolet light irradiation to increase the annual thickness of the film layer after pre-curing, and then a printing process is performed to realize the optical curved surface design of the organic layer, and finally the organic layer is formed by thermal curing or ultraviolet light curing.

[0077] Specifically, the concentration of the resin or additives is adjusted so that the resin is in a low viscosity state when it is coated or inkjet printed, and specifically the viscosity can be less than 50 centipa.s. After the resin is pre-cured but before the printing process is performed, the viscosity is increased to a higher level, specifically the viscosity can be 40,000 to 200,000 centipa.s, thereby making it easier to remove the resin during coating or inkjet printing. After pre-curing, the viscosity is increased to avoid displacement or shedding of the resin, thereby improving the film-forming effect.

[0078] Specifically, when forming the organic layer, in order to reduce the difficulty of the process, the curvature can be extended to the non-luminous area or the non-display area; in order to improve the improvement effect of color difference and uneven brightness, a corresponding curvature can be designed for each sub-pixel.

[0079] In one embodiment, if Figure 2 As shown, the driving circuit layer 12 includes an active layer 121 , a first gate insulating layer 122 , a first metal layer 123 , a second gate insulating layer 124 , a second metal layer 125 , an interlayer insulating layer 126 , a source and drain electrode layer 127 and a planarization layer 128 .

[0080] In one embodiment, if Figure 2 As shown, the light-emitting functional layer 13 includes a pixel electrode layer 131 , a pixel definition layer 132 , a light-emitting material layer 133 and a common electrode layer 134 .

[0081] At the same time, the embodiment of the present application provides an OLED display device, such as Figure 2 , Figure 6 As shown, the OLED display device includes an OLED display panel and an electronic component 31, wherein the OLED display panel includes:

[0082] Substrate 11;

[0083] A driving circuit layer 12 is disposed on one side of the substrate 11;

[0084] A light-emitting functional layer 13 is disposed on a side of the driving circuit layer 12 away from the substrate 11;

[0085] The encapsulation layer 14 is disposed on a side of the light-emitting functional layer 13 away from the driving circuit layer 12;

[0086] The OLED display panel 1 includes a display area 151 and a non-display area 152 , the encapsulation layer 14 includes an organic layer 142 , and the thickness L1 of the portion of the organic layer 142 located in the middle area of ​​the display area 151 is greater than the thickness L2 of the portion of the organic layer 142 located in the edge area of ​​the display area 151 .

[0087] An embodiment of the present application provides an OLED display device, which includes an OLED display panel and an electronic component. The OLED display panel designs an organic layer in an encapsulation layer so that the thickness of the portion of the organic layer located in the middle area of ​​the display area is greater than the thickness of the portion of the organic layer located in the edge area of ​​the display area. Therefore, there is no need for a light extraction layer, and the light extraction efficiency is improved through the organic layer, thereby reducing the thickness of the OLED display panel. At the same time, by changing the thickness of the organic layer, the difference between the optical path located in the middle area of ​​the display area and the optical path located in the edge area of ​​the display area is reduced, thereby alleviating or even eliminating the problem of different optical paths of light in different directions of the OLED display device, reducing or even eliminating the color difference in different directions, and avoiding the problem of uneven brightness.

[0088] In one embodiment, in the OLED display device, the thickness of the organic layer decreases gradually from the middle area of ​​the display area to the edge area of ​​the display area.

[0089] In one embodiment, in an OLED display device, the display area includes a light-emitting area and a non-light-emitting area, and the thickness of the organic layer located in the light-emitting area is greater than the thickness of the organic layer located in the non-light-emitting area.

[0090] In one embodiment, in an OLED display device, the thickness of a portion of the organic layer located in a middle region of the light-emitting region is greater than the thickness of a portion of the organic layer located in an edge region of the light-emitting region.

[0091] In one embodiment, in an OLED display device, the OLED display panel includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel, the shape of the organic layer at the position corresponding to the red sub-pixel is different from the shape of the organic layer at the position corresponding to the green sub-pixel, and the shape of the organic layer at the position corresponding to the green sub-pixel is different from the shape of the organic layer at the position corresponding to the blue sub-pixel.

[0092] In one embodiment, in an OLED display device, the encapsulation layer also includes a first inorganic layer and a second inorganic layer, the first inorganic layer is arranged between the organic layer and the light-emitting functional layer, the second inorganic layer is arranged on a side of the organic layer away from the first inorganic layer, the thickness of each region of the first inorganic layer is equal, and the thickness of each region of the second inorganic layer is equal.

[0093] In one embodiment, in an OLED display device, the surface of the organic layer in contact with the first inorganic layer is a plane, and on the side of the organic layer in contact with the second inorganic layer, the height of the organic layer in the middle area of ​​the light-emitting area is greater than the height of the organic layer in the edge area of ​​the light-emitting area.

[0094] In one embodiment, in an OLED display device, the edge region includes a first edge region and a second edge region located on both sides of the middle region, the thickness of the organic layer decreases from the middle region to the first edge region, and the thickness of the organic layer decreases from the middle region to the second edge region.

[0095] In one embodiment, in an OLED display device, the edge region includes a third edge region, a fourth edge region, a fifth edge region, and a sixth edge region located around the middle region, the thickness of the organic layer decreases from the middle region to the third edge region, the thickness of the organic layer decreases from the middle region to the fourth edge region, the thickness of the organic layer decreases from the middle region to the fifth edge region, and the thickness of the organic layer decreases from the middle region to the sixth edge region.

[0096] According to the above embodiments, it can be known that:

[0097] The embodiment of the present application provides an OLED display panel and an OLED display device, wherein the OLED display panel includes a substrate, a driving circuit layer, a light-emitting functional layer and an encapsulation layer, wherein the driving circuit layer is arranged on one side of the substrate, the light-emitting functional layer is arranged on the side of the driving circuit layer away from the substrate, and the encapsulation layer is arranged on the side of the light-emitting functional layer away from the driving circuit layer, wherein the OLED display panel includes a display area and a non-display area, and the encapsulation layer includes an organic layer, and the thickness of the portion of the organic layer located in the middle area of ​​the display area is greater than the thickness of the portion of the organic layer located in the edge area of ​​the display area. The present application designs the organic layer in the encapsulation layer so that the thickness of the portion of the organic layer located in the middle area of ​​the display area is greater than the thickness of the portion of the organic layer located in the edge area of ​​the display area, so that there is no need for a light extraction layer, and the light extraction efficiency is improved through the organic layer, thereby reducing the thickness of the OLED display panel. At the same time, by changing the thickness of the organic layer, the difference between the optical path in the middle area of ​​the display area and the optical path in the edge area of ​​the display area is reduced, thereby alleviating or even eliminating the problem of different optical paths of light in different directions of the OLED display device, reducing or even eliminating the color difference in different directions, and avoiding the problem of uneven brightness.

[0098] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0099] The above is a detailed introduction to an OLED display panel and an OLED display device provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An OLED display panel, characterized in that: include: substrate; A driving circuit layer is arranged on one side of the substrate; A light-emitting functional layer is arranged on a side of the driving circuit layer away from the substrate; An encapsulation layer is arranged on a side of the light-emitting functional layer away from the driving circuit layer; The OLED display panel includes a display area and a non-display area, the encapsulation layer includes an organic layer, the thickness of the portion of the organic layer located in the middle area of ​​the display area is greater than the thickness of the portion of the organic layer located in the edge area of ​​the display area; the edge area includes a first edge area and a second edge area located on both sides of the middle area, the thickness of the organic layer decreases from the middle area to the first edge area, and the thickness of the organic layer decreases from the middle area to the second edge area; along the direction from the middle area to the first edge area, the thickness of each portion of the organic layer is not equal, and along the direction from the middle area to the second edge area, the thickness of each portion of the organic layer is not equal.

2. The OLED display panel according to claim 1, wherein: The display area includes a light-emitting area and a non-light-emitting area, and a thickness of a portion of the organic layer located in the light-emitting area is greater than a thickness of a portion of the organic layer located in the non-light-emitting area.

3. The OLED display panel according to claim 2, wherein: The thickness of a portion of the organic layer located in a middle region of the light-emitting region is greater than the thickness of a portion of the organic layer located in an edge region of the light-emitting region.

4. The OLED display panel according to claim 3, wherein: The OLED display panel includes a red sub-pixel, a green sub-pixel and a blue sub-pixel. The shape of the organic layer at the position corresponding to the red sub-pixel is different from the shape of the organic layer at the position corresponding to the green sub-pixel, and the shape of the organic layer at the position corresponding to the green sub-pixel is different from the shape of the organic layer at the position corresponding to the blue sub-pixel.

5. The OLED display panel according to claim 3, wherein: The encapsulation layer also includes a first inorganic layer and a second inorganic layer, the first inorganic layer is arranged between the organic layer and the light-emitting functional layer, the second inorganic layer is arranged on a side of the organic layer away from the first inorganic layer, the thickness of each region of the first inorganic layer is equal, and the thickness of each region of the second inorganic layer is equal.

6. The OLED display panel according to claim 5, characterized in that: The surface of the organic layer in contact with the first inorganic layer is flat, and the height of the organic layer in the middle area of ​​the light-emitting area on the side of the organic layer in contact with the second inorganic layer is greater than the height of the organic layer in the edge area of ​​the light-emitting area.

7. The OLED display panel according to claim 6, wherein: The edge region includes a fourth edge region and a sixth edge region located on the other two sides of the middle region, the thickness of the organic layer decreases from the middle region to the fourth edge region, and the thickness of the organic layer decreases from the middle region to the sixth edge region.

8. The OLED display panel according to claim 5, wherein: The refractive index of the first inorganic layer is smaller than that of the organic layer, and the refractive index of the organic layer is smaller than that of the second inorganic layer.

9. The OLED display panel according to claim 8, wherein: The OLED display panel further includes a protective film, which is disposed on a side of the second inorganic layer away from the organic layer, and each region of the protective film has the same thickness.

10. The OLED display panel according to claim 3, wherein: The encapsulation layer also includes a first inorganic layer and a second inorganic layer, the first inorganic layer is arranged between the organic layer and the light-emitting functional layer, the second inorganic layer is arranged on a side of the organic layer away from the first inorganic layer, the thickness of each area of ​​the first inorganic layer is equal, the thickness of the second inorganic layer located in the middle area of ​​the light-emitting area is smaller than the thickness of the second inorganic layer located in the edge area of ​​the light-emitting area, and the thickness of the second inorganic layer located in the edge area of ​​the light-emitting area is smaller than the thickness of the second inorganic layer located in the non-light-emitting area.

11. An OLED display device, characterized in that: It comprises the OLED display panel and the electronic component as claimed in any one of claims 1 to 10.

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