Display panel, preparation method thereof and display device

Abstract

The invention provides a display panel, a preparation method thereof and a display device. The display panel comprises a substrate, and a pixel definition layer, a light-emitting layer, a packaging layer and a peep-proof layer which are laminated along a direction deviating from the substrate, the pixel definition layer defines a plurality of pixel openings arranged in an array, and the light-emitting layer is located in the pixel openings; the peep-proof layer comprises a first color film layer and a second color film layer, the first color film layer and the second color film layer are different in color, the first color film layer is located on the side, away from the substrate, of the packaging layer, the orthographic projection of the first color film layer on the substrate is located in the area between the orthographic projections of the two adjacent pixel openings on the substrate, and the second color film layer corresponds to the pixel openings. A part of the second color film layer covers the side, away from the substrate, of the first color film layer to form a first overlapping area. The display panel is simple in processing technology, the cost can be reduced, the display effect is not affected while the display panel has a good peep-proof effect, and the product competitiveness can be improved.

Description

Technical Field

[0001] The present invention generally relates to the field of display technologies, and particularly relates to a display panel, a preparation method thereof, and a display device. Background Art

[0002] As consumers pay more and more attention to privacy, the anti-peeping design of display products is of great significance. In related technologies, BM (black matrix) occlusion is mainly adopted, and by directly designing BM light shielding in the vertical direction of the PDL (pixel definition area), the viewing angle is restricted. However, this solution usually requires setting multiple layers of BM (black matrix) + OC (protection coating) to achieve large-range light shielding, resulting in more process masks and complex processes. Summary of the Invention

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a display panel that has a good anti-peeping effect while having a good display effect, has fewer processing processes, is simple to operate, is beneficial to reducing processing costs, and thus is beneficial to improving production and processing efficiency and product competitiveness.

[0004] In a first aspect, the present invention provides a display panel, including: a substrate, and a pixel definition layer, a light-emitting layer, a packaging layer, and an anti-peeping layer stacked along a direction away from the substrate; the pixel definition layer defines a plurality of pixel openings arranged in an array, and the light-emitting layer is located within the pixel openings;

[0005] The anti-peeping layer includes a first color film layer and a second color film layer, the first color film layer and the second color film layer have different colors, the first color film layer is located on a side of the packaging layer away from the substrate, and a positive projection of the first color film layer on the substrate is located in a region between positive projections of two adjacent pixel openings on the substrate, the second color film layer is arranged corresponding to the pixel openings, and a partial region of the second color film layer covers a side of the first color film layer away from the substrate to form a first overlapping region.

[0006] As an optional solution, the thickness of the first color film layer is 3 μm - 5 μm.

[0007] As an optional solution, the thickness of the region where the second color film layer covers the side of the first color film layer away from the substrate is 1 μm - 3 μm.

[0008] As an optional solution, the anti-peeping layer further includes a third color film layer, the third color film layer has a different color from the first color film layer and the second color film layer, the third color film layer is arranged corresponding to the pixel openings, a partial region of the third color film layer covers a side of the first color film layer away from the substrate to form a second overlapping region, or a partial region of the third color film layer covers a side of the first overlapping region away from the substrate.

[0009] As an alternative, the thickness of the third color film layer covering the area on the side of the first color film layer away from the substrate is 1 μm - 3 μm, or the thickness of the third color film layer covering the area on the side of the first overlapping area away from the substrate is 1 μm - 3 μm.

[0010] As an alternative, the anti-peeping layer further includes a black matrix. The black matrix is located on the side of the encapsulation layer away from the substrate, and the first color film layer covers the side of the black matrix away from the substrate. The orthographic projection area of the first color film layer on the substrate is located inside the orthographic projection area of the black matrix on the substrate, or the orthographic projection area of the first color film layer on the substrate completely overlaps with the orthographic projection area of the black matrix on the substrate.

[0011] As an alternative, when the orthographic projection area of the first color film layer on the substrate is located inside the orthographic projection area of the black matrix on the substrate, the distance between the orthographic projection edge of the first color film layer on the substrate and the orthographic projection edge of the black matrix on the substrate is less than or equal to 3 μm.

[0012] As an alternative, the thickness of the black matrix is 1 μm - 3 μm. The orthographic projection of the black matrix on the substrate is located inside the orthographic projection of the pixel definition layer on the substrate, and the distance between the edge of the orthographic projection of the black matrix on the substrate and the edge of the orthographic projection of the pixel definition layer on the substrate is 3 μm - 9 μm.

[0013] As an alternative, a touch layer is further included, and the touch layer is located between the encapsulation layer and the anti-peeping layer.

[0014] As an alternative, a protective layer is further included, and the protective layer is disposed on the side of the anti-peeping layer away from the substrate.

[0015] In a second aspect, the present invention provides a method for manufacturing a display panel, specifically including the following steps:

[0016] Provide a substrate, and stack and form a pixel definition layer, a light-emitting layer, and an encapsulation layer on the substrate in a direction away from the substrate; the pixel definition layer defines a plurality of pixel openings arranged in an array, and the light-emitting layer is located within the pixel openings;

[0017] Form an anti-peeping layer. The anti-peeping layer includes a first color film layer and a second color film layer. The first color film layer and the second color film layer have different colors. The first color film layer is located on the side of the encapsulation layer away from the substrate, and the orthographic projection of the first color film layer on the substrate is located in the area between the orthographic projections of two adjacent pixel openings on the substrate. The second color film layer is arranged corresponding to the pixel openings, and a partial area of the second color film layer covers the side of the first color film layer away from the substrate to form a first overlapping area.

[0018] As an alternative, after forming the first color film layer and the second color film layer, forming the anti-peeping layer further includes:

[0019] A third color film layer is formed. The color of the third color film layer is different from that of the first color film layer and the second color film layer. The third color film layer is disposed corresponding to the pixel openings. A partial area of the third color film layer covers one side of the first color film layer facing away from the substrate to form a second overlapping area, or a partial area of the third color film layer covers one side of the first overlapping area facing away from the substrate.

[0020] As an alternative solution, before forming the first color film layer, forming the anti-peeping layer further includes:

[0021] A black matrix is formed. The black matrix is located on the side of the encapsulation layer facing away from the substrate, and the first color film layer covers the side of the black matrix facing away from the substrate. The orthographic projection area of the first color film layer on the substrate is located inside the orthographic projection area of the black matrix on the substrate, or the orthographic projection area of the first color film layer on the substrate completely overlaps with the orthographic projection area of the black matrix on the substrate.

[0022] In a third aspect, the present invention provides a display device, including the display panel of the first aspect or the display panel prepared by the preparation method according to the second aspect.

[0023] In the display panel of the present invention, by providing an anti-peeping layer, the anti-peeping layer includes a first color film layer and a second color film layer. The colors of the first color film layer and the second color film layer are different. The first color film layer is located on the side of the encapsulation layer facing away from the substrate, and the orthographic projection of the first color film layer on the substrate is located in the area between the orthographic projections of two adjacent pixel openings on the substrate. The second color film layer is disposed corresponding to the pixel openings. A partial area of the second color film layer covers the side of the first color film layer facing away from the substrate to form a first overlapping area. By providing the first color film layer and the second color film layer on the side of the encapsulation layer facing away from the substrate, the projection of the first color film layer is located in the area between two adjacent pixel openings, the second color film layer is disposed corresponding to the pixel opening area, and at the same time, a partial area covers the first color film layer. In this way, while the second color film layer achieves a light filtering effect, the second color film layer and the first color film layer form a first overlapping area, and the first overlapping area can replace the function of the black matrix, thereby achieving light shielding to achieve an anti-peeping effect. By controlling the thicknesses of the first color film layer and the second color film layer, the display panel has a good anti-peeping effect, without the need to provide multiple black matrices, the process is simple, the cost is saved, and it is beneficial to improve the production and processing efficiency and product competitiveness. Description of the Drawings

[0024] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, objects, and advantages of the present application will become more obvious:

[0025] Figure 1 It is a schematic structural diagram of a display panel in the prior art;

[0026] Figure 2 It is a schematic structural diagram of the first display panel of the embodiment of the present invention;

[0027] Figure 3 Schematic diagram of the structure of the second display panel according to an embodiment of the present invention;

[0028] Figure 4 Schematic diagram of the structure of the third display panel according to an embodiment of the present invention;

[0029] Figure 5 Schematic diagram of the structure of the fourth display panel according to an embodiment of the present invention;

[0030] Figure 6 Schematic diagram of the structure of the fifth display panel according to an embodiment of the present invention;

[0031] Figure 7 Schematic diagram of the structure of the sixth display panel according to an embodiment of the present invention;

[0032] Figure 8 Schematic diagram of the structure of the seventh display panel according to an embodiment of the present invention.

[0033] In the figure,

[0034] 100, display panel;

[0035] 10, substrate, 20, pixel definition layer, 30, light-emitting layer, 40, encapsulation layer, 41, first inorganic encapsulation layer, 42, organic encapsulation layer, 43, second inorganic encapsulation layer;

[0036] 50, touch control layer, 51, barrier layer, 52, first metal layer, 53, insulating layer, 54, second metal layer;

[0037] 60, black matrix, 70, anti-peeping layer, 71, first color film layer, 72, second color film layer, 73, third color film layer, 80, protective layer;

[0038] 90, high-thickness black material layer. Detailed implementation manners

[0039] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention, rather than limiting the invention. Additionally, it should be noted that for the sake of description, only the parts related to the invention are shown in the drawings.

[0040] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.

[0041] As Figure 1As shown, in the related art, in order to achieve the anti-peeping effect of the display panel, a black matrix and a protective layer are usually stacked on the side of the encapsulation layer facing away from the substrate. The viewing angle is restricted by the black matrix. In order to achieve a good anti-peeping effect, multiple layers of black matrix and protective layer are usually set, which results in more processes of the mask plate, complex operation, high cost, and low processing efficiency at the same time.

[0042] Based on the above problems, as Figure 2 shown, an embodiment of the present application provides a display panel 100, including: a substrate 10, and a pixel definition layer 20, a light-emitting layer 30, an encapsulation layer 40, and an anti-peeping layer 70 stacked in a direction away from the substrate 10; the pixel definition layer 20 defines a plurality of pixel openings arranged in an array, and the light-emitting layer 30 is located within the pixel openings;

[0043] The anti-peeping layer 70 includes a first color film layer 71 and a second color film layer 72. The colors of the first color film layer 71 and the second color film layer 72 are different. The first color film layer 71 is located on the side of the encapsulation layer 40 facing away from the substrate 10, and the orthographic projection of the first color film layer 71 on the substrate 10 is located in the region between the orthographic projections of two adjacent pixel openings on the substrate 10. The second color film layer 72 is arranged corresponding to the pixel openings, and a partial area of the second color film layer 72 covers the side of the first color film layer 71 facing away from the substrate 10 to form a first overlapping area.

[0044] It should be noted that the substrate 10 can be understood as the backplane of the display panel. The substrate 10 may include a substrate, and a driving layer on the substrate stacked in a direction away from the silicon substrate, etc. Among them, the substrate may be, but is not limited to, glass, PI (Polyimide), PET (Polyethylene glycol terephthalate), silicon (monocrystalline silicon or polycrystalline silicon), etc. For example, the substrate 10 may be a silicon substrate, such as monocrystalline silicon, and the corresponding display panel is a silicon-based display panel.

[0045] The driving layer may include a plurality of pixel driving circuits distributed in an array. The pixel driving circuit may include electronic components such as a plurality of transistors and capacitors. For example, each pixel driving circuit may include three transistors and one capacitor, constituting 3T1C (that is, one driving transistor, two switching transistors, and one capacitor). It may also include more than three transistors and at least one capacitor, such as 4T1C (that is, one driving transistor, three switching transistors, and one capacitor), 5T1C (that is, one driving transistor, four switching transistors, and one capacitor), or 7T1C (that is, one driving transistor, six switching transistors, and one capacitor), etc. Among them, the transistor may be a thin film transistor (Thin Film Transistor, abbreviated as TFT).

[0046] It can be understood that a thin-film transistor may include a control electrode, a first electrode, and a second electrode. Among them, the control electrode is the gate electrode of the thin-film transistor, the first electrode is one of the source electrode and the drain electrode of the thin-film transistor, and the second electrode is the other of the source electrode and the drain electrode of the thin-film transistor.

[0047] In some embodiments, the driving layer may include an active layer, a first gate metal layer (Gate1), a second gate metal layer (Gate2), a first metal wiring layer (SD1), and a second metal wiring layer (SD2). These film layers are configured to form thin-film transistors, capacitors, and multiple signal lines for pixel driving in the pixel driving circuit. For example, the multiple signal lines may include: a power supply signal line, a data signal line, a reset signal line, a scan signal line, an enable signal line, and an initialization signal line, etc. The driving layer may further include an insulating layer that separates these film layers.

[0048] The light-emitting device layer is stacked on the side of the driving layer away from the substrate. The light-emitting device layer may include: a pixel definition layer 20 and multiple light-emitting devices. The pixel definition layer 20 has multiple pixel openings, and one pixel opening defines the position of one light-emitting device to form one sub-pixel. For example, the light-emitting device may be an OLED light-emitting device or a QLED light-emitting device, etc. Taking the OLED light-emitting device as an example, along the direction away from the substrate, the light-emitting device may include a first electrode, a light-emitting layer 30, and a second electrode stacked in sequence. Of course, the light-emitting device may further include at least one of a hole injection layer, a hole transport layer, and an electron blocking layer disposed between the first electrode and the light-emitting layer 30, and at least one of an electron injection layer, an electron transport layer, and a hole blocking layer disposed between the second electrode and the light-emitting layer 30; in some embodiments, the first electrode may be an anode layer, and the second electrode may be a cathode layer. Among them, the structure of the anode layer may be a composite structure formed by sequentially stacking a transparent conductive oxide thin film / metal thin film / transparent conductive oxide thin film. Among them, the material of the above transparent conductive oxide thin film is, for example, any one of ITO (Indium tin oxide) and IZO (Indium zinc oxide), and the material of the above metal thin film is, for example, any one of gold (Au), silver (Ag), nickel (Ni), and platinum (Pt). Another example is that the structure of the anode layer may also be a single-layer structure, and the material of the single-layer structure may be any one of ITO, IZO, Au, Ag, Ni, Pt. Each pixel opening exposes a part of the anode layer of the corresponding light-emitting device, and at least a part of the light-emitting layer 30 is located within the corresponding pixel opening and forms an electrical connection with the corresponding anode layer. For example, the cathode layers of the respective light-emitting devices may be electrically connected to each other and form an integral structure. For example, the material of the cathode layer may be any one of aluminum (Al), silver (Ag), and magnesium (Mg), or any one of a magnesium-silver alloy and an aluminum-lithium alloy.

[0049] The encapsulation layer 40 is disposed on a side of the light-emitting device layer away from the silicon substrate to protect the light-emitting device. The encapsulation layer 40 may include a first inorganic encapsulation layer 41, an organic encapsulation layer 42, and a second inorganic encapsulation layer 43. For example, the first inorganic encapsulation layer 41 and the second inorganic encapsulation layer 43 may be made of an inorganic material such as nitride, oxide, oxynitride, nitrate, carbide, or any combination thereof, and the preparation process may employ a Chemical Vapor Deposition (CVD) process, such as a Plasma Enhanced Chemical Vapor Deposition (PECVD) process. For example, the organic insulating layer may be made of materials such as acrylic fiber, hexamethyldisiloxane, polyacrylate, polycarbonate, polystyrene, etc., and the preparation process may employ an Ink Jet Printing (IJP) process.

[0050] It can also be understood that the anti-peeping layer 70 is located on a side of the encapsulation layer 40 away from the substrate 10. The anti-peeping layer 70 includes a first color film layer 71 and a second color film layer 72, and the colors of the first color film layer 71 and the second color film layer 72 are different. Each of the first color film layer 71 and the second color film layer 72 may be one of a red color film layer, a green color film layer, and a blue color film layer; exemplarily, the first color film layer 71 may be a red color film layer, and the second color film layer 72 may be a green color film layer or a blue color film layer; or, the first color film layer 71 may be a green color film layer, and the second color film layer 72 may be a red color film layer or a blue color film layer; or, the first color film layer 71 may be a blue color film layer, and the second color film layer 72 may be a red color film layer or a green color film layer.

[0051] Among them, the first color film layer 71 is located on the side of the encapsulation layer 40 away from the substrate 10. Specifically, the first color film layer 71 is correspondingly arranged in the area between two adjacent pixel openings. That is to say, the orthographic projection area of the first color film layer 71 on the substrate 10 is located inside the orthographic projection area of the pixel definition layer 20 on the substrate 10 or in the area between the orthographic projections of two adjacent pixel openings on the substrate 10. In this way, it is ensured that the setting of the first color film layer 71 will not affect the normal light-emitting display of each pixel; the second color film layer 72 is located on the side of the encapsulation layer 40 away from the substrate 10 and is correspondingly arranged with the pixel opening. That is to say, the orthographic projection of the second color film layer 72 on the substrate 10 at least coincides with the orthographic projection of the pixel opening on the substrate 10. A part of the second color film layer 72 covers the side of the first color film layer 71 away from the substrate 10 to form a first overlapping area with the first color film layer 71. In this way, while the second color film layer 72 realizes the normal light filtering function, the first overlapping area can reliably block light and avoid light leakage, replacing the black matrix 60, and achieving a good anti-peeping effect; among them, the second color film layer 72 can completely cover the first color film layer 71, that is to say, the orthographic projection of the first color film layer 71 on the substrate 10 is located inside the orthographic projection area of the second color film layer 72 on the substrate 10, or the second color film layer 72 covers a part of the first color film layer 71, that is to say, the orthographic projection of the second color film layer 72 on the substrate 10 partially overlaps with the orthographic projection of the first color film layer 71 on the substrate 10;

[0052] In the actual processing process, the thickness of the first color film layer 71 and the thickness of the second color film layer 72 (the dimension in the direction perpendicular to the substrate 10) can be adjusted according to actual needs. Since the second color film layer 72 covers the first color film layer 71, the thickness of the second color film layer 72 should be greater than the thickness of the first color film layer 71. The thickness of the first overlapping area corresponding to the thicknesses of the first color film layer 71 and the second color film layer 72 increases, which is equivalent to the stacking thickness of the black matrix 60. In this way, the process is saved, and the anti-peeping layer 70 is reliably formed, making the display panel have a good anti-peeping effect.

[0053] The display panel according to the embodiment of the present application solves the problem of complex process in the prior art where a multi-layer stacked black matrix 60 is used in the display panel to achieve the anti-peeping effect. The display panel according to the embodiment of the present application is provided with a first color film layer 71 and a second color film layer 72 on the side of the encapsulation layer 40 facing away from the substrate 10. The projection of the first color film layer 71 is located in the area between adjacent two pixel openings, and the second color film layer 72 is correspondingly arranged in the area of the pixel opening and covers part of the area of the first color film layer 71 at the same time. In this way, while the second color film layer 72 realizes the light filtering effect, the second color film layer 72 and the first color film layer 71 form a first overlapping area, and the first overlapping area can replace the function of the black matrix 60, so as to realize light shielding to achieve the anti-peeping effect. By controlling the thicknesses of the first color film layer 71 and the second color film layer 72, the display panel has a good anti-peeping effect, and there is no need to set a multi-layer black matrix 60, with simple process, cost saving, and being beneficial to improving the production and processing efficiency and product competitiveness.

[0054] In some embodiments, the thickness of the first color film layer 71 is 3 μm - 5 μm.

[0055] In this embodiment, the thickness of the first color film layer 71 conforms to the existing processing technology, is simple to process, and the thickness of the first color film layer 71 can ensure that after being covered by the second color film layer 72, the light shielding effect can be reliably achieved, thus being beneficial to realizing the anti-peeping effect.

[0056] In some embodiments, the thickness of the area where the second color film layer 72 covers the side of the first color film layer 71 facing away from the substrate 10 is 1 μm - 3 μm.

[0057] Specifically, the thickness of the area where the second color film layer 72 covers the side of the first color film layer 71 facing away from the substrate 10 can be but is not limited to 1 μm, 1.5 μm, 2 μm, 2.5 μm or 3 μm, etc.

[0058] In this embodiment, the thickness of the area where the second color film layer 72 covers the side of the first color film layer 71 facing away from the substrate 10 is beneficial to reliably achieving the light shielding effect, thus ensuring the realization of the anti-peeping effect and being convenient for processing at the same time.

[0059] In some embodiments, the thickness of the second color film layer 72 can be 4 μm - 7 μm.

[0060] As an implementable way, as Figure 3 shown, the anti-peeping layer 70 further includes a third color film layer 73. The third color film layer 73 has a different color from the first color film layer 71 and the second color film layer 72. The third color film layer 73 is correspondingly arranged for the pixel opening. Part of the area of the third color film layer 73 covers the side of the first color film layer 71 facing away from the substrate 10 to form a second overlapping area, or part of the area of the third color film layer 73 covers the side of the first overlapping area facing away from the substrate 10.

[0061] It can be understood that the color of the third color filter layer 73 is different from the color of the first color filter layer 71 and the color of the second color filter layer 72. The third color filter layer 73 and the second color filter layer 72 are respectively arranged corresponding to the pixel openings, and the third color filter layer 73 and the second color filter layer 72 may overlap or not overlap; when the third color filter layer 73 and the second color filter layer 72 overlap, the maximum overlapping area of ​​the third color filter layer 73 and the second color filter layer 72 does not exceed the area of ​​the first color filter layer 71, which is conducive to reliably achieving the anti-peeping effect without affecting the display effect of each pixel;

[0062] When the second color filter layer 72 only covers a portion of the first color filter layer 71, the third color filter layer 73 can cover the remaining portion of the first color filter layer 71 to form a second overlapping area without overlapping with the second color filter layer 72, or the third color filter layer 73 covers the remaining portion of the first color filter layer 71 while covering the first overlapping area; the embodiments of the present application do not impose specific restrictions on this, as long as the first overlapping area and the second overlapping area can achieve a shading effect.

[0063] In this embodiment, the provision of the third color filter layer 73 is helpful to increase the thickness of the anti-peeping layer 70 and further improve the anti-peeping effect.

[0064] In some embodiments, the third color filter layer 73 covers the area of ​​the first color filter layer 71 away from the substrate 10 with a thickness of 1 μm-3 μm, or the third color filter layer 73 covers the area of ​​the first overlapping region away from the substrate 10 with a thickness of 1 μm-3 μm.

[0065] Specifically, the thickness of the third color filter layer 73 covering the area on the side of the first color filter layer 71 away from the substrate 10 may be but is not limited to 1 μm, 1.5 μm, 2 μm, 2.5 μm or 3 μm, etc., or the thickness of the third color filter layer 73 covering the area on the side of the first overlapping area away from the substrate 10 may be but is not limited to 1 μm, 1.5 μm, 2 μm, 2.5 μm or 3 μm, etc.

[0066] In this embodiment, the thickness of the third color filter layer 73 covering the area of ​​the first color filter layer 71 away from the substrate 10 or the thickness covering the first overlapping area is conducive to improving the light shielding effect, thereby further improving the anti-peeping effect and facilitating processing.

[0067] As an achievable method, Figure 4As shown, the anti-peeping layer 70 further includes a black matrix 60. The black matrix 60 is located on the side of the encapsulation layer 40 away from the substrate 10, and the first color film layer 71 covers the side of the black matrix 60 away from the substrate 10. The orthographic projection area of the first color film layer 71 on the substrate 10 is located inside the orthographic projection area of the black matrix 60 on the substrate 10, or the orthographic projection area of the first color film layer 71 on the substrate 10 completely overlaps with the orthographic projection area of the black matrix 60 on the substrate 10.

[0068] In this embodiment, by setting the structure of the black matrix 60 and the stacked color film layers, it is beneficial to further improve the anti-peeping effect. At the same time, there is no need to set multiple black matrices 60, which simplifies the process, is convenient for processing, and is beneficial to further improve the production and processing efficiency.

[0069] In some embodiments, when the orthographic projection of the first color film layer 71 on the substrate 10 is located inside the orthographic projection of the black matrix 60 on the substrate 10, the distance between the edge of the orthographic projection area of the first color film layer 71 and the orthographic projection edge of the black matrix 60 is less than or equal to 3 μm.

[0070] In this embodiment, it is beneficial to ensure that after the first color film layer 71 is formed, stacking the second color film layer 72 and the third color film layer 73 can reliably achieve the light-shielding effect, and thus achieve the anti-peeping effect.

[0071] In some embodiments, the thickness of the black matrix 60 (the dimension in the direction perpendicular to the substrate 10) can be 1 μm - 3 μm. The orthographic projection of the black matrix 60 on the substrate 10 is located inside the orthographic projection of the pixel defining layer 20 on the substrate 10, and the distance between the edge of the orthographic projection of the black matrix 60 on the substrate 10 and the edge of the orthographic projection of the pixel defining layer 20 on the substrate 10 is 3 μm - 9 μm.

[0072] Specifically, the thickness of the black matrix 60 can be, but is not limited to, 1 μm, 1.5 μm, 2 μm, 2.5 μm, or 3 μm, etc.; the distance between the edge of the orthographic projection of the black matrix 60 on the substrate 10 and the edge of the orthographic projection of the pixel defining layer 20 on the substrate 10 can be, but is not limited to, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, or 9 μm, etc.

[0073] The thickness of the black matrix 60 and the distance between the orthographic projection of the black matrix 60 and the orthographic projection of the pixel defining layer 20 in this embodiment are convenient for processing and do not affect the light-emitting effect of each pixel while achieving the anti-peeping effect.

[0074] As an implementable manner, as Figure 2-7 shown, the display panel further includes a touch control layer 50. The touch control layer 50 is located between the encapsulation layer 40 and the anti-peeping layer 70.

[0075] Among them, the touch layer 50 generally may include a barrier layer 51 (TBL), a first metal layer 52 (TMA), an insulating layer 53 (TLD), and a second metal layer 54 (TMB) that are stacked along the direction away from the substrate 10. Among them, the first metal layer 52 and the second metal layer 54 form a capacitive structure. The touch layer 50 is located between the encapsulation layer 40 and the anti-peeking layer 70, that is, the touch layer 50 is disposed on the side of the encapsulation layer 40 away from the substrate 10. The anti-peeking layer 70 can not only achieve the anti-peeking effect, but also achieve the light filtering effect, so that the display panel has a good display effect.

[0076] In this embodiment, the touch layer 50 is located between the encapsulation layer 40 and the anti-peeking layer 70 to implement an in-screen touch structure, which is beneficial to reducing the thickness of the display panel. Of course, in other embodiments, the touch layer 50 may also be disposed at other positions of the display panel, and the embodiments of the present application do not limit this.

[0077] As an implementable manner, as Figure 2-7 shown, a protective layer 80 is further included, and the protective layer 80 is disposed on the side of the anti-peeking layer 70 away from the substrate 10.

[0078] Among them, the protective layer 80 has the function of protecting the underlying film layer and flattening. The thickness of the protective layer 80 may be 1 μm - 5 μm.

[0079] In actual processing, the protective layer 80 may be a multi-layer structure stacked, for example, but not limited to, the protective layer 80 may include a first planar layer, a second planar layer, and a cover plate stacked along the direction away from the substrate 10.

[0080] As an implementable manner, according to the actual requirements of the display panel, as Figure 8 shown, in the preparation process of the first color filter layer 71, the second color filter layer 72, and / or the third color filter layer 73, a halftone mask plate may be used for the non-anti-peeking area, which can reduce the thickness of the color filter in the non-anti-peeking area; for example, the thickness of the first color filter layer 71 in the non-anti-peeking area may be 1 μm - 3 μm, the thickness of the second color filter layer 72 in the non-anti-peeking area may be 1 μm - 3 μm, and the thickness of the third color filter layer 73 in the non-anti-peeking area may be 1 μm - 5 μm.

[0081] As an implementable manner, as Figure 5 shown, the anti-peeking layer 70 includes a high-thickness black material layer 90, the high-thickness black material layer 90 is located on the side of the color filter layer away from the substrate 10, and the orthographic projection of the high-thickness black material layer 90 on the substrate 10 coincides with the orthographic projection of the black matrix 60 on the substrate 10, or the orthographic projection of the high-thickness black material layer 90 on the substrate 10 is located within the orthographic projection of the black matrix 60 on the substrate 10.

[0082] In some embodiments, the display panel includes a substrate 10, and a pixel definition layer 20, a light-emitting layer 30, a packaging layer 40, a touch control layer 50, a black matrix 60, a color filter layer, and a high-thickness black material layer 90 arranged in a direction away from the substrate 10.

[0083] In actual processing, the pixel definition layer 20, the light-emitting layer 30, the packaging layer 40, the touch control layer 50, the black matrix (BM) 60, and the color filter layer (COE) are sequentially formed. The color filter layer is arranged corresponding to the pixel openings and partially overlaps with the black matrix 60; the high-thickness black material layer 90 is formed, and the high-thickness black material layer 90 covers the side of the black matrix 60 away from the substrate 10, and the thickness of the high-thickness black material layer 90 is 3 μm - 8 μm.

[0084] In some other embodiments, as Figure 6 shown, the high-thickness black material layer 90 is located inside the touch control layer 50, and the high-thickness black material layer 90 is located on the side of the second metal layer 54 away from the substrate 10;

[0085] In actual processing, after the substrate 10, the pixel definition layer 20, the light-emitting layer 30, and the packaging layer 40 are sequentially formed, a barrier layer 51, a first metal layer 52, an insulating layer 53, and a second metal layer 54 are sequentially formed on the side of the packaging layer 40 away from the substrate 10. A high-thickness black material layer 90 and a planarization layer are formed on the side of the second metal layer 54 away from the substrate 10, and then the black matrix 60, the color filter layer, and a protective layer 80 are sequentially formed on the side of the planarization layer away from the substrate 10.

[0086] Among them, the thickness of the high-thickness black material layer 90 can be 3 μm - 7 μm, the thickness of the black matrix 60 can be 1 μm - 3 μm, the thickness of the color filter layer can be 2 μm - 4 μm, and the thickness of the protective layer 80 can be 3 μm - 5 μm.

[0087] As an implementable manner, as Figure 7 shown, the second metal layer 54 of the touch control layer 50 is a black metal, and the second metal layer 54 is configured as an anti-peeping layer 70.

[0088] In actual processing, after the substrate 10, the pixel definition layer 20, the light-emitting layer 30, and the packaging layer 40 are sequentially formed, a barrier layer 51, a first metal layer 52, an insulating layer 53, and a second metal layer 54 are sequentially formed on the side of the packaging layer 40 away from the substrate 10. The second metal layer 54 is made of a black metal, and the orthographic projection of the second metal layer 54 on the substrate 10 overlaps with the orthographic projection of the pixel definition layer 20 on the substrate 10. The orthographic projection of the second metal layer 54 on the substrate 10 can be located within the orthographic projection area of the pixel definition layer 20 on the substrate 10, or the orthographic projection of the pixel definition layer 20 on the substrate 10 can be located within the orthographic projection area of the second metal layer 54 on the substrate 10; then the planarization layer, the color filter layer, and the protective layer 80 are sequentially formed;

[0089] In summary, for the display panel according to the embodiments of the present application, by providing a first color filter layer 71 and a second color filter layer 72 on the side of the encapsulation layer 40 facing away from the substrate 10, the projection of the first color filter layer 71 is located in the region between adjacent two pixel openings, the second color filter layer 72 is correspondingly disposed in the region of the pixel opening, and partially covers the first color filter layer 71. In this way, while the second color filter layer 72 achieves a light filtering effect, the second color filter layer 72 and the first color filter layer 71 form a first overlapping region, and the first overlapping region can replace the function of the black matrix 60, thereby achieving light shielding to achieve an anti-peeking effect. By controlling the thicknesses of the first color filter layer 71 and the second color filter layer 72, the display panel has a good anti-peeking effect without the need to provide multiple black matrices 60. Its process is simple, cost-saving, and is conducive to improving production and processing efficiency and product competitiveness;

[0090] Moreover, the provision of the third color filter layer 73 and the black matrix 60 is conducive to further improving the anti-peeking effect.

[0091] In a second aspect, the embodiments of the present application provide a method for manufacturing a display panel, which specifically includes the following steps:

[0092] Step S10: Provide a substrate 10, and stack and form a pixel definition layer 20, a light-emitting layer 30, and an encapsulation layer 40 on the substrate 10 in a direction away from the substrate 10; the pixel definition layer 20 defines a plurality of pixel openings arranged in an array, and the light-emitting layer 30 is located within the pixel openings;

[0093] Step S20: Form an anti-peeking layer 70, the anti-peeking layer 70 includes a first color filter layer 71 and a second color filter layer 72, the first color filter layer 71 and the second color filter layer 72 have different colors, the first color filter layer 71 is located on the side of the encapsulation layer 40 facing away from the substrate 10, and the orthographic projection of the first color filter layer 71 on the substrate 10 is located in the region between the orthographic projections of adjacent two pixel openings on the substrate 10, the second color filter layer 72 is correspondingly disposed for the pixel openings, and a partial region of the second color filter layer 72 covers the side of the first color filter layer 71 facing away from the substrate 10 to form a first overlapping region.

[0094] It can be understood that forming the pixel definition layer 20, the light-emitting layer 30, and the first color filter layer 71 and the second color filter layer 72 can all adopt existing manufacturing processes. According to actual requirements, increasing the thicknesses of the first color filter layer 71 and the second color filter layer 72 is conducive to further improving the anti-peeking effect, thereby reducing the setting of masks, simplifying the process, facilitating processing, and improving production and processing efficiency.

[0095] In some embodiments, after forming the first color filter layer 71 and the second color filter layer 72, forming the anti-peeking layer 70 further includes:

[0096] A third color film layer 73 is formed. The third color film layer 73 has a different color from the first color film layer 71 and the second color film layer 72. The third color film layer 73 is disposed corresponding to the pixel openings. A partial area of the third color film layer 73 covers the side of the first color film layer 71 facing away from the substrate 10 to form a second overlapping area, or a partial area of the third color film layer 73 covers the side of the first overlapping area facing away from the substrate 10.

[0097] In some embodiments, before forming the first color film layer 71, forming the anti-peeping layer 70 further includes:

[0098] Forming a black matrix 60. The black matrix 60 is located on the side of the encapsulation layer 40 facing away from the substrate 10, and the first color film layer 71 covers the side of the black matrix 60 facing away from the substrate 10. The orthographic projection area of the first color film layer 71 on the substrate 10 is located inside the orthographic projection area of the black matrix 60 on the substrate 10, or the orthographic projection area of the first color film layer 71 on the substrate 10 completely overlaps with the orthographic projection area of the black matrix 60 on the substrate 10.

[0099] The following uses specific embodiments to illustrate the method for manufacturing a display panel of the present application.

[0100] Embodiment 1

[0101] The substrate 10, the pixel definition layer 20, the light-emitting layer 30, the encapsulation layer 40, and the touch control layer 50 are sequentially formed;

[0102] A black matrix 60 is formed on the side of the touch control layer 50 facing away from the substrate 10. The orthographic projection of the black matrix 60 on the substrate 10 is located inside the orthographic projection of the pixel definition layer 20 on the substrate 10; wherein, the thickness of the black matrix 60 is 1 μm - 3 μm, and the distance between the edge of the orthographic projection of the black matrix 60 and the edge of the orthographic projection of the pixel definition layer 20 is 3 μm - 9 μm;

[0103] A first color film layer 71 is formed on the side of the black matrix 60 facing away from the substrate 10. The orthographic projection of the first color film layer 71 on the substrate 10 is located inside the orthographic projection of the black matrix 60 on the substrate 10. The thickness of the first color film layer 71 is 3 μm - 5 μm, and the distance between the edge of the orthographic projection of the first color film layer 71 and the edge of the orthographic projection of the black matrix 60 is less than or equal to 3 μm;

[0104] The second color film layer 72 and the third color film layer 73 are formed in sequence. The second color film layer 72 and the third color film layer 73 are each arranged corresponding to the pixel openings, and a partial area of the second color film layer 72 forms a first overlapping area with the first color film layer 71, and the third color film layer 73 covers a part of the first overlapping area. Among them, the thickness of the second color film layer 72 is 4 μm - 6 μm, the thickness of the third color film layer 73 is 4 μm - 7 μm, the distance between the edge of the orthographic projection of the second color film layer 72 on the substrate 10 and the edge of the orthographic projection of the black matrix 60 on the substrate 10 is less than or equal to 3 μm, and the distance between the edge of the orthographic projection of the third color film layer 73 on the substrate 10 and the edge of the orthographic projection of the black matrix 60 on the substrate 10 is less than or equal to 6 μm. Among them, the first color film layer 71, the second color film layer 72, and the third color film layer 73 can be any one of a red color film, a green color film, and a blue color film, and the colors of the first color film layer 71, the second color film layer 72, and the third color film layer 73 are different.

[0105] A protective layer 80 is formed. The protective layer 80 is located on the side of the anti-peeping layer 70 away from the substrate 10, and the thickness of the protective layer 80 is 1 μm - 5 μm.

[0106] Embodiment 2

[0107] Different from Embodiment 1, the black matrix 60 is not provided in this embodiment;

[0108] Embodiment 3

[0109] Different from Embodiment 2, as Figure 8 shown, in this embodiment, for the non-anti-peeping area, a halftone mask plate can be used for the setting of the color film layer to reduce its thickness.

[0110] In a third aspect, an embodiment of the present application provides a display device, including the display panel of the first aspect or the display panel prepared by the preparation method according to the second aspect. It can be understood that this display device has all the features and advantages of the above-mentioned array substrate or display panel, which will not be elaborated here. In short, this display device has a good display effect, and has a good anti-peeping effect, improving the production and processing efficiency and the overall competitiveness of the product.

[0111] Among them, the display device is a product with an image display function. For example, the display device can be any one of a monitor, a television, a billboard, a digital photo frame, a laser printer with a display function, a telephone, a mobile phone, a personal digital assistant (PDA), a digital camera, a portable video camera, a viewfinder, a navigator, a vehicle, a large-area wall, a household appliance, an information query device (such as a business query device in departments such as e-government, banks, hospitals, and power), a monitor, etc. The display device can also be a microdisplay or a product containing a microdisplay. The product containing a microdisplay can be any one of a smart watch, a smart bracelet, a head-mounted display, a stereoscopic display mirror, and an AR device (such as AR glasses), a VR device (such as VR glasses), etc. For example, the microdisplay can be a display with a display size ranging from about 0.2 inches to about 2.5 inches, but not limited thereto. Understandably, the microdisplay can also be a display with a smaller display size, such as a display size less than or equal to 0.2 inches.

[0112] It should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. in the above text is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the panel or component referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0113] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solution formed by mutually replacing the above features with the (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A display panel, characterized in that: include: A substrate, and a pixel definition layer, a light emitting layer, a packaging layer, and a privacy layer stacked in a direction away from the substrate; the pixel definition layer defines a plurality of pixel openings arranged in an array, and the light emitting layer is located in the pixel openings; The anti-peeping layer includes a first color filter layer and a second color filter layer, the first color filter layer and the second color filter layer have different colors, the first color filter layer is located on the side of the encapsulation layer away from the substrate, and the orthographic projection of the first color filter layer on the substrate is located in the area between the orthographic projections of two adjacent pixel openings on the substrate, the second color filter layer is arranged corresponding to the pixel opening, and a partial area of ​​the second color filter layer covers the side of the first color filter layer away from the substrate to form a first overlapping area.

2. The display panel according to claim 1, characterized in that: The thickness of the first color filter layer is 3 μm-5 μm.

3. The display panel according to claim 1, characterized in that: The thickness of the second color filter layer covering the area of ​​the first color filter layer facing away from the substrate is 1 μm-3 μm.

4. The display panel according to claim 1, characterized in that: The anti-peeping layer also includes a third color filter layer, the third color filter layer has a different color from the first color filter layer and the second color filter layer, the third color filter layer is arranged corresponding to the pixel opening, a partial area of ​​the third color filter layer covers the side of the first color filter layer away from the substrate to form a second overlapping area, or a partial area of ​​the third color filter layer covers the side of the first overlapping area away from the substrate.

5. The display panel according to claim 4, characterized in that: The thickness of the third color filter layer covering the area of ​​the first color filter layer away from the substrate is 1 μm-3 μm, or the thickness of the third color filter layer covering the area of ​​the first overlapping area away from the substrate is 1 μm-3 μm.

6. The display panel according to claim 1 or 4, characterized in that: The anti-peep layer also includes a black matrix, which is located on the side of the encapsulation layer away from the substrate, and the first color filter layer covers the side of the black matrix away from the substrate, the orthographic projection area of ​​the first color filter layer on the substrate is located inside the orthographic projection area of ​​the black matrix on the substrate, or the orthographic projection area of ​​the first color filter layer on the substrate completely overlaps with the orthographic projection area of ​​the black matrix on the substrate.

7. The display panel according to claim 6, characterized in that: When the orthographic projection area of ​​the first color filter layer on the substrate is located inside the orthographic projection area of ​​the black matrix on the substrate, the distance between the orthographic projection edge of the first color filter layer on the substrate and the orthographic projection edge of the black matrix on the substrate is less than or equal to 3μm.

8. The display panel according to claim 6, characterized in that: The thickness of the black matrix is ​​1μm-3μm, the orthographic projection of the black matrix on the substrate is located inside the orthographic projection of the pixel definition layer on the substrate, and the distance between the edge of the orthographic projection of the black matrix on the substrate and the edge of the orthographic projection of the pixel definition layer on the substrate is 3μm-9μm.

9. The display panel according to any one of claims 1 to 8, characterized in that: It also includes a touch layer, which is located between the packaging layer and the anti-peeping layer.

10. The display panel according to any one of claims 1 to 8, characterized in that: The invention also comprises a protection layer, wherein the protection layer is arranged on a side of the anti-peeping layer away from the substrate.

11. A method for preparing a display panel, characterized in that: The specific steps include: Providing a substrate, on which a pixel definition layer, a light-emitting layer and an encapsulation layer are stacked in a direction away from the substrate; the pixel definition layer defines a plurality of pixel openings arranged in an array, and the light-emitting layer is located in the pixel openings; An anti-peeping layer is formed, wherein the anti-peeping layer includes a first color filter layer and a second color filter layer, wherein the first color filter and the second color filter have different colors, wherein the first color filter layer is located on a side of the encapsulation layer away from the substrate, and an orthographic projection of the first color filter layer on the substrate is located in an area between orthographic projections of two adjacent pixel openings on the substrate, and the second color filter layer is arranged corresponding to the pixel opening, and a partial area of ​​the second color filter layer covers a side of the first color filter layer away from the substrate to form a first overlapping area.

12. The method according to claim 11, characterized in that After forming the first color filter layer and the second color filter layer, forming the anti-peeping layer further includes: A third color filter layer is formed, wherein the color of the third color filter layer is different from that of the first color filter layer and the second color filter layer, and the third color filter layer is arranged corresponding to the pixel opening, and a partial area of ​​the third color filter layer covers a side of the first color filter layer away from the substrate to form a second overlapping area, or a partial area of ​​the third color filter layer covers a side of the first overlapping area away from the substrate.

13. The method according to claim 11, characterized in that Before forming the first color filter layer, forming the anti-peeping layer further includes: The black matrix is ​​formed, the black matrix is ​​located on the side of the encapsulation layer away from the substrate, and the first color filter layer covers the side of the black matrix away from the substrate, the orthographic projection area of ​​the first color filter layer on the substrate is located inside the orthographic projection area of ​​the black matrix on the substrate, or the orthographic projection area of ​​the first color filter layer on the substrate completely overlaps with the orthographic projection area of ​​the black matrix on the substrate.

14. A display device, characterized in that A display panel comprising the display panel according to any one of claims 1 to 10 or a display panel prepared according to the preparation method according to any one of claims 11 to 13.

Images