An OLED display panel and display device

Abstract

An OLED display panel and a display device, the OLED display panel comprising a driving back plate (1) and an OLED light-emitting device (2), an encapsulation structure (3) and a color resistance structure (4) arranged on the driving back plate (1); wherein the encapsulation structure (3) and the color resistance structure (4) are located on a side of the OLED light-emitting device (2) away from the driving back plate (1), and the color resistance structure (4) comprises a color resistance layer (41), a first light-shielding matrix (42) and a second light-shielding matrix (43); the first light-shielding matrix (42) is located on a side of the color resistance layer (41) away from the driving back plate (1), and the second light-shielding matrix (43) is located on a side of the color resistance layer (41) facing the driving back plate (1). The OLED display panel can weaken the color separation phenomenon of the display panel in a dark state and improve the color separation problem of the display panel in a dark state.

Description

[0001] This application is a divisional application. The original application has the application number 201980002509.0 and the original application date is November 20, 2019. The entire contents of the original application are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of display technology, and in particular to an OLED display panel and display device. Background Technology

[0003] Organic light-emitting diode (OLED) displays have gradually begun to encroach on the market share of liquid crystal displays (LCDs) due to their advantages such as faster response speed, thinner thickness, and higher contrast. In particular, their ability to bend and flexibly make them the preferred technology for flexible display devices.

[0004] Because OLED light-emitting structures contain a large amount of metal, they have a high reflectivity to ambient light. Therefore, circular polarizers are commonly used to reduce the reflection of ambient light onto the OLED substrate. After attaching the circular polarizer, a flexible touch substrate is usually attached. However, both the flexible touch substrate and the circular polarizer are relatively thick, affecting the flexibility and folding performance of the entire OLED module. Therefore, to achieve better folding performance and reduce the bending radius, COE (CF on Encapsulation) technology has been proposed. This involves forming a color resist layer on the thin-film encapsulated light-emitting device using a low-temperature photolithography process. This structure reduces panel reflection, improves color purity, and reduces panel thickness. However, in the off-screen state (also known as dark state), this structure exhibits color separation under point and line light source illumination. The cause and solution to this problem are currently unclear. Summary of the Invention

[0005] This application discloses an OLED display panel and a display device, with the aim of improving the color separation phenomenon of COE OLED display panels in the dark state.

[0006] To achieve the above objectives, this disclosure provides the following technical solution:

[0007] An OLED display panel includes a driving backplane and an OLED light-emitting device, an encapsulation structure, and a color resist structure disposed on the driving backplane; wherein the encapsulation structure and the color resist structure are located on the side of the OLED light-emitting device facing away from the driving backplane, and the color resist structure includes a color resist layer, a first light-shielding matrix, and a second light-shielding matrix; the first light-shielding matrix is ​​located on the side of the color resist layer facing away from the driving backplane, and the second light-shielding matrix is ​​located on the side of the color resist layer facing the driving backplane.

[0008] Optionally, the OLED light-emitting device has at least one scattering layer on the side opposite to the driving backplate, the scattering layer comprising an organic material film and scattering particles disposed in the organic material film.

[0009] Optionally, the encapsulation structure has two inorganic insulating layers and a first organic insulating layer located between the two inorganic insulating layers;

[0010] The first organic insulating layer is configured as the scattering layer.

[0011] Optionally, the color resist layer is configured as the scattering layer.

[0012] Optionally, the color resist layer includes red, green, and blue resists, and the particle size of the scattering particles contained in the red, green, and blue resists decreases sequentially.

[0013] Optionally, the display panel further includes a second organic insulating layer located between the encapsulation structure and the color resist structure;

[0014] The second organic insulating layer is configured as a scattering layer.

[0015] Optionally, the display panel further includes a touch structure located on the side of the packaging structure opposite to the driving backplate; the touch structure is located between the packaging structure and the color resist structure, or the touch structure is located on the side of the color resist structure opposite to the driving backplate.

[0016] Optionally, the display panel further includes a third organic insulating layer located between the touch structure and the color resist structure; the third organic insulating layer is configured as the scattering layer.

[0017] Optionally, the display panel further includes a touch structure located on the side of the encapsulation structure opposite to the driving backplate, the touch structure having two layers of touch electrodes and a fourth organic insulating layer located between the two layers of touch electrodes;

[0018] The fourth organic insulating layer is configured as the scattering layer.

[0019] Optionally, the display panel further includes a touch structure located on the side of the encapsulation structure opposite to the driving backplate, and a fifth organic insulating layer located on the side of the touch structure and the color resist structure opposite to the driving backplate.

[0020] The fifth organic insulating layer is configured as the scattering layer.

[0021] Optionally, the scattering particles are inorganic scattering particles, which are one or a mixture of several of titanium oxide, zirconium oxide, silicon oxide, calcium carbonate, and barium sulfate.

[0022] Optionally, the particle size of the inorganic scattering particles is 40 nm to 700 nm, and the mass percentage of the inorganic scattering particles in the organic material film is 1% to 15%.

[0023] Optionally, the scattering particles are organic scattering particles, the ratio of the refractive index of the organic scattering particles to that of the organic material film is 0.7-0.99, and the mass percentage of the organic scattering particles in the organic material film is 5%-40%.

[0024] Optionally, the display panel includes a touch structure located on the side of the color resist structure opposite to the driving backplate;

[0025] The display panel also includes a third light-shielding matrix located on the side of the touch structure opposite to the driving backplate.

[0026] Optionally, the OLED light-emitting device has a first electrode layer electrically connected to the driving backplate, and the surface of the first electrode layer facing away from the driving backplate is rough.

[0027] Optionally, the driving backplane includes a planarization layer facing the OLED light-emitting device, and the first electrode layer of the OLED light-emitting device is disposed on the planarization layer;

[0028] The surface of the planarization layer is configured as a rough surface to make the surface of the first electrode layer formed on the planarization layer rough.

[0029] Optionally, the planarization layer comprises two film layers.

[0030] Optionally, the planarization layer is made of silicone, acrylic, or epoxy resin materials.

[0031] A display device comprising an OLED display panel as described in any of the preceding claims. Attached Figure Description

[0032] Figure 1 This is a schematic diagram illustrating the process by which ambient light is reflected by the first electrode layer within each RGB pixel of the display panel.

[0033] Figure 2 This is a schematic cross-sectional view of a display panel provided in an embodiment of the present disclosure;

[0034] Figure 3 A schematic cross-sectional view of a display panel provided for another embodiment of this disclosure;

[0035] Figure 4 A schematic cross-sectional view of a display panel provided for another embodiment of this disclosure;

[0036] Figure 5 A schematic cross-sectional view of a display panel provided for another embodiment of this disclosure;

[0037] Figure 6 A schematic cross-sectional view of a display panel provided for another embodiment of this disclosure;

[0038] Figure 7 A schematic cross-sectional view of a display panel provided for another embodiment of this disclosure;

[0039] Figure 8 A schematic cross-sectional view of a display panel provided for another embodiment of this disclosure;

[0040] Figure 9 Histograms of color separation in dark conditions for various display panels with different settings. Detailed Implementation

[0041] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0042] like Figure 2 and Figure 7 As shown, this embodiment of the present disclosure provides an OLED display panel, including a driving backplate 1 and an OLED light-emitting device 2, an encapsulation structure 3, and a color resist structure 4 disposed on the driving backplate 1; wherein, the encapsulation structure 3 and the color resist structure 4 are located on the side of the OLED light-emitting device 2 away from the driving backplate 1, and the color resist structure 4 includes a color resist layer 41, a first light-shielding matrix 42, and a second light-shielding matrix 43; the first light-shielding matrix 42 is located on the side of the color resist layer 41 away from the driving backplate 1, and the second light-shielding matrix 43 is located on the side of the color resist layer 41 facing the driving backplate 1.

[0043] The inventors discovered through research that the surface of the electrode layer in the OLED light-emitting device 2 is smooth, acting as a mirror to reflect light in a directional manner. The first electrode layer 21, electrically connected to the driving backplate 1, is formed on the driving backplate 1. However, the source / drain electrodes (SD) 10 and other structures within the driving backplate 1 cause the surface of the first electrode layer 21 facing away from the driving backplate 1 to become uneven. Figure 1As shown, when ambient light is reflected by the first electrode layer 21 within each RGB pixel, the reflected light will have different reflection paths or spatial distributions of light intensity. Therefore, the white balance at a certain path or spatial angle may be disrupted, resulting in different colors being seen at different locations. This can easily lead to color separation of reflected light on the display panel when the screen is off. In addition, the openings in the color resist structure have a certain diffraction effect on the reflected light, which will further enhance the phenomenon of color separation of reflected light. Therefore, display panels manufactured using COE (CF on Encapsulation) technology will exhibit more obvious color separation in the dark.

[0044] In view of this discovery, in the OLED display panel provided in the embodiments of this disclosure, such as Figure 2 and Figure 7 As shown, the color resist structure 4 is designed as a color resist layer 41 and two light-shielding matrix layers, and the two light-shielding matrix layers (first light-shielding matrix 42 and second light-shielding matrix 43) are respectively set on both sides of the color resist layer 41 to solve the color separation problem of the display panel in the dark state.

[0045] Conventional COE OLED display panels have only one light-shielding matrix, which is located on the side of the color resist layer facing the driving backplane. The inventors have discovered that by using a double-layer light-shielding matrix and placing the double-layer light-shielding matrix on both sides of the color resist layer, the color separation phenomenon of the display panel in dark conditions can be significantly reduced.

[0046] Specifically, in the OLED display panel provided in this embodiment, the double-layer light-shielding matrix is ​​respectively disposed on both sides of the color resist layer, and can be adjacent to the color resist layer or not; for example, refer to Figure 2 and Figure 7 The setup shown depicts the first light-blocking matrix 42, the color resist layer 41, and the second light-blocking matrix 43 arranged adjacent to each other; alternatively, one can refer to... Figure 4 The arrangement shown places the second light-shielding matrix 43 between the film layers of the encapsulation structure, so that the second light-shielding matrix 43 is not adjacent to the color resist layer.

[0047] Specifically, Figure 9 This is a histogram showing the color separation degree of the display panel in the dark state, obtained based on the analysis results of experimental data. Where ΔEab... max An indicator that characterizes the color separation of a display panel in the dark. Figure 9There are four histograms along the horizontal axis, representing the experimental data results of dark-state reflectance light for four specific embodiments of the display panel. In these four embodiments, the display panel includes a driving backplane, an OLED light-emitting device, an encapsulation structure, and a color resist structure arranged sequentially. The driving backplane includes a glass substrate and a thin-film transistor array (TFT array) on the glass substrate. The OLED light-emitting device includes an anode, a light-emitting structure, and a cathode arranged sequentially. The differences between the four embodiments are as follows: Embodiment a: The driving backplane includes a planarization layer on the TFT array, and the anode (i.e., the first electrode layer) of the OLED light-emitting device is formed on this planarization layer. This planarization layer uses conventional acrylic materials and is a single-layer film (i.e., a single-layer PLN). Embodiment b: The driving backplane includes a planarization layer on the TFT array, and the anode of the OLED light-emitting device is formed on this planarization layer. This planarization layer uses conventional acrylic materials and has two film layers (i.e., a double-layer PLN). Embodiment c: The driving backplane includes a planarization layer on the TFT array, and the anode of the OLED light-emitting device is formed on this planarization layer. This planarization layer is a single-layer film and uses silicone materials (i.e., SOG). PLN); Example d: The anode of the OLED light-emitting device is formed directly on the glass substrate of the driving backplane, and the film surface is very flat (i.e., flat anode).

[0048] Specifically, Figure 9 In the diagram, each histogram contains two sets of experimental data, which are the experimental results obtained under two different color resist structures. The specific settings of the two different color resist structures are as follows: A) Bottom BM, that is, the color resist structure includes a color resist layer and a light-shielding matrix (BM). The light-shielding matrix is ​​located on the side of the color resist layer facing the driving backplane. This color resist structure is the color resist structure of a conventional COE OLED display panel; B) Double BM, that is, the color resist structure includes a color resist layer and two light-shielding matrices. The two light-shielding matrices are respectively disposed on both sides of the color resist layer. This color resist structure is a color resist structure of an OLED display panel according to an embodiment of this disclosure.

[0049] like Figure 9 As shown, by comparing the two data points A and B in the four sets of histograms, it can be seen that the ΔEab of data point B in each set of experimental data... max Compared to data A, all data B shows a significant decrease, with the ΔEab in the histograms of groups a, c, and d being particularly significant. max Approximately half of data A, the ΔEab of data B in the histogram of group b. maxIt is even close to 1 / 3 of data A; from the above data results, it can be directly concluded that the double-layer BM configuration, compared to the single-layer BM configuration, can significantly reduce the degree of color separation of reflected light from the display panel in dark conditions. In other words, compared to the conventional configuration of setting only one BM layer on the side of the color resist layer facing the driving backplane, the configuration of setting two BM layers on both sides of the color resist layer can effectively reduce the degree of color separation of reflected light from the display panel in dark conditions. Therefore, it can be verified that the display panel of the present disclosure embodiment can significantly reduce the degree of color separation of reflected light in dark conditions.

[0050] In one specific embodiment, such as Figures 3 to 8 As shown, the OLED display panel provided in this embodiment has at least one scattering layer 6 on the side of the OLED light-emitting device 2 away from the driving backplate 1. The scattering layer 6 includes an organic material film and scattering particles (also known as light-diffusing particles) 61 disposed in the organic material film. Optionally, the scattering particles can be uniformly distributed in the organic material film.

[0051] In the OLED display panel provided in this embodiment, a scattering layer 6 is provided on the light-emitting side of the OLED light-emitting device 2. The scattering particles 61 in the scattering layer 6 can scatter light, so that the path or light intensity spatial distribution of reflected light in each pixel is more uniform, thereby reducing the color separation phenomenon caused by the directional reflection of the first electrode layer 21, thereby further improving the color separation phenomenon of the display panel.

[0052] Optionally, the scattering particle 61 can be an inorganic scattering particle, which can be one or a mixture of several of zirconium oxide, silicon oxide, calcium carbonate, barium sulfate, and titanium dioxide (titanium oxide), specifically, it can be a mixture of powders of different materials.

[0053] Optionally, the particle size of the inorganic scattering particles can be 40 nm to 700 nm, and the mass percentage of the inorganic scattering particles in the organic material film is 1% to 15%.

[0054] Optionally, the scattering particle 61 can be an organic scattering particle. The organic scattering particle can be one or a mixture of several of the following: organosilicon microspheres, polyacrylic acid series, polymethyl methacrylate (PMMA), polystyrene (PS) microspheres, etc. The refractive index of the organic scattering particle is less than the refractive index of the organic material film.

[0055] Optionally, the ratio of the refractive index of the organic scattering particles to that of the organic material film is between 0.7 and 0.99, and the refractive index can specifically be between 1.2 and 1.6; further optionally, the mass percentage of the organic scattering particles in the organic material film is between 5% and 40%.

[0056] In one specific implementation, such as Figure 2 , Figure 3 and Figure 7 As shown, the encapsulation structure 3 has two inorganic insulating layers 31 and a first organic insulating layer 32 located between the two inorganic insulating layers 31.

[0057] Optional, such as Figure 3 As shown, the first organic insulating layer 32 is configured as a scattering layer 6, that is, the first organic insulating layer 32 includes an organic material film and scattering particles 61 disposed in the organic material film.

[0058] Of course, the encapsulation structure 3 is not limited to the three layers mentioned above; it can also be a structure with three or more alternating organic and inorganic layers.

[0059] In one specific implementation, such as Figure 2 , Figure 4 and Figure 7 As shown, the color resist structure 4 has a color resist layer 41.

[0060] Optional, such as Figure 4 As shown, the color resist layer 41 is configured as a scattering layer 6. That is, the color resist layer 41 includes an organic material film and scattering particles 61 disposed in the organic material film.

[0061] For example, the color resist layer 41 specifically includes red, green, and blue color resists. Specifically, the particle size of the scattering particles 61 contained in the red, green, and blue color resists can decrease sequentially, specifically matching the wavelength of the emitted light from each color resist. For instance, the particle size of the scattering particles 61 in the red color resist can be 1 / 5λ to λ, where λ is the wavelength of red light; the size of the scattering particles 61 in the green and blue color resists is set similarly. This allows each color of light to not only produce a scattering effect when encountering the scattering particles 1, but also to undergo diffraction, thereby further increasing the uniformity of the path or intensity spatial distribution of reflected light in each pixel, thus further improving the color separation phenomenon of the display panel.

[0062] In one specific implementation, such as Figure 7 As shown, the display panel of this embodiment may include a second organic insulating layer 71 located between the encapsulation structure 3 and the color resist structure 4. The second organic insulating layer 71 is configured as a scattering layer 6, that is, the second organic insulating layer includes an organic material film and scattering particles 61 disposed in the organic material film.

[0063] In one specific implementation, such as Figure 2 , Figure 6 and Figure 8As shown, the OLED display panel provided in this embodiment may further include a touch structure 5 located on the side of the encapsulation structure 3 away from the driving backplate 1, and a third organic insulating layer 72 located between the touch structure 5 and the color resist structure 4.

[0064] For example, the touch structure 5 can be disposed between the color resist structure 4 and the packaging structure 3, as detailed in the following document. Figures 2 to 6 Alternatively, the touch structure 5 can also be located on the side of the color resist structure 4 opposite to the packaging structure 3; see [link / reference] for details. Figure 7 and Figure 8 .

[0065] For example, such as Figure 6 and Figure 8 As shown, the third organic insulating layer 72 is configured as a scattering layer 6, that is, the third organic insulating layer 72 includes an organic material film and scattering particles 61 disposed in the organic material film.

[0066] For example, such as Figure 2 and Figure 7 As shown, the touch structure 5 has two layers of touch electrodes 51 and a fourth organic insulating layer 52 located between the two layers of touch electrodes 51.

[0067] Optionally, the fourth organic insulating layer 52 can also be configured as a scattering layer 6, that is, the fourth organic insulating layer 52 includes an organic material film and scattering particles 61 disposed in the organic material film.

[0068] For example, the two touch electrodes 51 are a driving electrode and a sensing electrode made of two layers of metal, respectively.

[0069] In one specific implementation, such as Figure 7 and Figure 8 As shown, when the touch structure 5 is located on the side of the color resist structure 4 away from the packaging structure 3, the display panel provided in this embodiment may further include a third light-shielding matrix 9 located on the side of the touch structure 5 away from the driving backplate 1. Specifically, the third light-shielding matrix 9 can block the light reflected by the touch electrodes from escaping, thereby reducing the reflection of ambient light by the display panel.

[0070] In one specific implementation, such as Figure 2 , Figure 5 and Figure 7 As shown, the OLED display panel provided in this embodiment of the present disclosure further includes a fifth organic insulating layer 73 located on the side of the color resist structure 4 and the touch structure 5 away from the driving backplate 1.

[0071] For example, such as Figure 5As shown, the fifth organic insulating layer 73 can be configured as a scattering layer 6, that is, the fifth organic insulating layer 73 includes an organic material film and scattering particles 61 disposed in the organic material film.

[0072] In one specific embodiment, such as Figure 2 As shown, the OLED light-emitting device 2 has a first electrode layer 21 that is electrically connected to the driving backplate 1, and the surface of the first electrode layer 21 facing away from the driving backplate 1 is rough.

[0073] In the OLED display panel provided in this embodiment, the surface of the first electrode layer 21 facing away from the driving backplate 1 is roughened, so that the surface is no longer smooth. This allows the first electrode layer 21 to diffusely reflect light instead of reflecting it directionally. This reduces the unevenness of the path or spatial distribution of light intensity of the reflected light from each RGB pixel, thereby achieving the technical effect of reducing the color separation phenomenon of the display panel in dark conditions and improving the color separation problem of the display panel.

[0074] In one specific embodiment, such as Figure 2 As shown, the driving backplate 1 includes a planarization layer 12 facing the OLED light-emitting device 2, and the first electrode layer 21 of the OLED light-emitting device 2 is disposed on the planarization layer 12.

[0075] Specifically, the driving backplane 1 generally includes a substrate 11 and a thin film transistor array (TFT array) fabricated on the substrate 11. A planarization layer 12 is provided on the TFT array. The first electrode layer 21 is generally formed on the planarization layer 12 by magnetron sputtering and is electrically connected to the TFT array through vias in the planarization layer 12.

[0076] For example, the surface of the planarization layer 12 is configured as a rough surface, which in turn makes the surface of the first electrode layer 21 formed on the planarization layer 12 rough.

[0077] For example, the first electrode layer 21 can be an anode, and the OLED light-emitting device 2 also includes a light-emitting structure layer 22 and a transparent cathode 23.

[0078] In one specific embodiment, the planarization layer 12 may include two film layers, that is, two film layers are formed by two preparation processes to complete the fabrication of the planarization layer 12. The surface of the planarization layer 12 formed in this way can be flatter, which in turn can make the surface of the first electrode layer 21 formed on the planarization layer 12 flatter, reduce the surface unevenness, and thus weaken the phenomenon of color separation of reflected light in the dark.

[0079] Furthermore, the planarization layer 12 is made of silicone-based materials (SOG). Similarly, the planarization layer 12 formed by using silicone-based materials will have a flatter surface, which will make the surface of the first electrode layer 21 flatter, thereby reducing the color separation phenomenon of reflected light in the dark.

[0080] For example, the planarization layer 12 can also be made of acrylic series, epoxy resin series, or other materials, which will not be described in detail here.

[0081] Specifically, to more intuitively demonstrate the improvement effect of the display panel provided in the various embodiments of this disclosure on color separation in dark conditions, Figure 9 The paper presents experimental data results on dark-state reflected light under four specific embodiments of display panels, specifically, as follows: Figure 9 As shown, there are four sets of histograms on the horizontal axis, representing the experimental data results of dark-state reflected light under the following four specific embodiments: Embodiment a: The first electrode layer of the OLED light-emitting device is disposed on a planarization layer, which is a single-layer film (single-layer PLN); Embodiment b: The first electrode layer of the OLED light-emitting device is disposed on a planarization layer, which has two film layers (double-layer PLN); Embodiment c: The first electrode layer of the OLED light-emitting device is disposed on a planarization layer, which uses an organosilicon series material (SOG PLN); Embodiment d: The first electrode layer of the OLED light-emitting device is directly disposed on a planar substrate (planar anode). Each histogram contains two experimental data points (bottom BM and double-layer BM), which correspond to two different color resist structures.

[0082] like Figure 9 As shown, by comparing the histograms of groups b, c, and d with group a (comparing data between groups of the same color resist structure), it can be seen that the ΔEab of the histograms of groups b, c, and d... max ΔEab relative to group a max All showed a significant decrease, with ΔEab in the histograms of groups c and d being particularly noticeable. max Even smaller than group a's ΔEab max The result is 1 / 2. Therefore, it can be concluded that compared to the conventional single-layer PLN display panel setup, setting the PLN as a double-layer film, selecting silicone-based materials to prepare the PLN, or other methods that flatten the anode surface, can effectively reduce the color separation of reflected light in the dark state. Furthermore, the flatter the anode surface, the better the effect of reducing color separation. In summary, the experimental data analysis results clearly show that the display panels provided in the embodiments of this disclosure can significantly reduce the color separation of reflected light in the dark state.

[0083] For example, the OLED display panel provided in this embodiment is a flexible foldable display panel, and the substrate of the driving backplane is a flexible substrate.

[0084] For example, the OLED display panel provided in the embodiments of this disclosure, such as Figure 2 As shown, in addition to the driving backplate 1, OLED light-emitting device 2, encapsulation structure 3, touch structure 5 and color resist structure 4, it may also include other film layer structures, such as upper protective layer 81 and lower protective layer 82, which will not be described in detail here.

[0085] In addition, this disclosure also provides a display device, which includes the OLED display panel of any of the above.

[0086] For example, the display device provided in the embodiments of this disclosure may be a smartphone, tablet computer, monitor, or other product.

[0087] Although preferred embodiments of this disclosure have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this disclosure.

[0088] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this disclosure without departing from the spirit and scope of the embodiments of this disclosure. Therefore, if these modifications and variations to the embodiments of this disclosure fall within the scope of the claims of this disclosure and their equivalents, this disclosure is also intended to include these modifications and variations.

Claims

1. An OLED display panel, comprising a driving backplane and OLED light-emitting devices, an encapsulation structure, and a color resist structure disposed on the driving backplane; wherein, The encapsulation structure and color resist structure are located on the side of the OLED light-emitting device away from the driving backplate; The OLED light-emitting device has at least one scattering layer on the side away from the driving backplate, the scattering layer comprising an organic material film and scattering particles disposed in the organic material film; The color resist structure includes a color resist layer, a first light-blocking matrix, and a second light-blocking matrix. The first light-blocking matrix is ​​located on the side of the color resist layer away from the back plate, and the second light-blocking matrix is ​​located on the side of the color resist layer facing the drive back plate. The orthographic projection of the second light-blocking matrix on the drive back plate covers the orthographic projection of the first light-blocking matrix on the drive back plate; The first shading matrix and the second shading matrix are interconnected, and both the first shading matrix and the second shading matrix are adjacent to the color resist layer.

2. The OLED display panel as described in claim 1, wherein, The encapsulation structure has two inorganic insulating layers and a first organic insulating layer located between the two inorganic insulating layers; The first organic insulating layer is configured as the scattering layer.

3. The OLED display panel as described in claim 1, wherein, The color resist structure includes a color resist layer; the color resist layer is configured as the scattering layer.

4. The OLED display panel as described in claim 3, wherein, The color resist layer includes red, green and blue resists, and the particle size of the scattering particles contained in the red, green and blue resists decreases sequentially.

5. The OLED display panel as described in claim 1, wherein, It also includes a second organic insulating layer located between the encapsulation structure and the color resist structure; The second organic insulating layer is configured as a scattering layer.

6. The OLED display panel as claimed in claim 1, wherein, It also includes a touch structure located on the side of the packaging structure opposite to the driving backplate; the touch structure is located between the packaging structure and the color resist structure, or the touch structure is located on the side of the color resist structure opposite to the driving backplate.

7. The OLED display panel as claimed in claim 6, wherein, It also includes a third organic insulating layer located between the touch structure and the color resist structure; The third organic insulating layer is configured as the scattering layer.

8. The OLED display panel as claimed in claim 6, wherein, The touch structure has two layers of touch electrodes and a fourth organic insulating layer located between the two layers of touch electrodes; The fourth organic insulating layer is configured as the scattering layer.

9. The OLED display panel as claimed in claim 6, wherein, It also includes a fifth organic insulating layer located on the side of the touch structure and color resist structure opposite to the drive back plate; The fifth organic insulating layer is configured as the scattering layer.

10. The OLED display panel as claimed in claim 1, wherein, The scattering particles are inorganic scattering particles, which are one or a mixture of several of titanium oxide, zirconium oxide, silicon oxide, calcium carbonate, and barium sulfate.

11. The OLED display panel as claimed in claim 10, wherein, The inorganic scattering particles have a particle size of 40nm to 700nm, and the mass percentage of the inorganic scattering particles in the organic material film is 1% to 15%.

12. The OLED display panel as claimed in claim 1, wherein, The scattering particles are organic scattering particles, the ratio of the refractive index of the organic scattering particles to that of the organic material film is 0.7-0.99, and the mass percentage of the organic scattering particles in the organic material film is 5%-40%.

13. The OLED display panel according to any one of claims 1-12, wherein, Includes a touch structure, which is located on the side of the color resist structure opposite to the driving back plate; The display panel also includes a third light-shielding matrix located on the side of the touch structure opposite to the driving backplate.

14. The OLED display panel according to any one of claims 1-12, wherein, The OLED light-emitting device has a first electrode layer electrically connected to the driving backplate, and the surface of the first electrode layer facing away from the driving backplate is rough.

15. The OLED display panel as claimed in claim 14, wherein, The driving backplate includes a planarization layer facing the OLED light-emitting device, and the first electrode layer of the OLED light-emitting device is disposed on the planarization layer; The surface of the planar layer is configured as a rough surface so that the surface of the first electrode layer formed on the planar layer is rough.

16. The OLED display panel as claimed in claim 15, wherein, The planarization layer comprises two film layers.

17. The OLED display panel as claimed in claim 15, wherein, The planarization layer is made of silicone, acrylic, or epoxy resin materials.

18. A display device comprising an OLED display panel as claimed in any one of claims 1-17.

Images