Display panel, manufacturing method thereof, and display device

By using black opaque materials or anti-reflective particles in the film packaging layer of the OLED display panel, and designing an inclined pattern on the contact end surface of the black matrix and the color film, the problem of high reflectivity of metal traces in the driving circuit layer is solved, and the display effect and large viewing angle brightness are improved.

CN114530565BActive Publication Date: 2025-08-26EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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Patent Information

Application Number
CN202011323888.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2020-11-23
Publication Date
2025-08-26
Estimated Expiration
2040-11-23

AI Technical Summary

Technical Problem

The existing OLED display panels have a high reflectivity of metal traces on the drive circuit layer, resulting in poor light output, affecting the display effect.

Method used

In the film packaging layer, a black opaque material or a non-transmissive part filled with anti-reflective particles is used, and an inclined pattern design is adopted on the contact end surface of the black matrix and the color film to block the reflected light from the metal trace part of the driving circuit layer.

Benefits of technology

It reduces the reflectivity of OLED devices, improves the display effect, and enhances the brightness attenuation angle of large viewing angles, improving outdoor visual function.

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Abstract

The present application provides a display panel, a manufacturing method thereof, and a display device, wherein the display panel includes a substrate; an organic light-emitting layer, located on one side of the substrate, the organic light-emitting layer including OLED pixels; a thin-film encapsulation layer, located on a side of the organic light-emitting layer away from the substrate, including multiple layers of organic thin films having light-transmitting portions and non-light-transmitting portions, the non-light-transmitting portions being made of black non-light-transmitting material or filled with anti-reflective particles; and a color filter layer, located on a side of the thin-film encapsulation layer away from the substrate, including a color filter arranged above the OLED pixels; the color filter forms a first projection area based on the substrate, the OLED pixels form a second projection area based on the substrate, the non-light-transmitting portions of the organic thin film in the thin-film encapsulation layer form a third projection area based on the substrate, the area after removing the intersection of the first projection area and the second projection area from the first projection area forms a fourth projection area, and the third projection area covers the fourth projection area; the present application reduces the reflectivity of the OLED device.
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Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display panel and a manufacturing method thereof, and a display device. Background Art

[0002] Compared with traditional LCD display panels (Liquid Crystal Display), OLED (Organic Light-Emitting Diode) display panels do not require a backlight and can achieve self-luminescence. They have the advantages of simple structure, light weight, high brightness, good luminous efficiency, wide viewing angle, and foldability. They are widely used in wearables, mobile phones, tablets, computers and other fields.

[0003] OLED devices are composed of thin organic materials and a glass substrate. A driving circuit generates current to control the organic material's light emission. The driving circuit of an OLED device consists of various patterned metal traces, which have strong reflectivity and affect the screen's light output. To reduce reflectivity, polarizers are typically attached to OLED devices. However, polarizers have the disadvantages of poor transmittance and high power consumption, significantly increasing the power consumption of OLED devices.

[0004] Therefore, there is an existing technology that uses filters, which can reduce the reflection of OLED devices and improve power consumption compared to the solution using polarizers. However, due to considerations such as equipment accuracy, OLED pixel design, or optical effects, the color filter in the filter will have different opening sizes. When the opening size of the color filter is larger than the OLED pixel size, the reflectivity of the metal traces in the driving circuit layer that is not covered by the black matrix is ​​higher, which increases the overall reflectivity of the OLED panel, deteriorates the light output effect of the OLED panel, and is not conducive to the display effect of the OLED panel. Summary of the Invention

[0005] In view of this, the present invention provides a display panel and a manufacturing method thereof, and a display device to reduce the reflectivity of an OLED display device.

[0006] According to one aspect of the present invention, there is provided a display panel, comprising:

[0007] substrate;

[0008] an organic light-emitting layer, located on one side of the substrate, the organic light-emitting layer including OLED pixels;

[0009] a thin film encapsulation layer, located on the side of the organic light-emitting layer away from the substrate, comprising multiple layers of organic thin films having light-transmitting portions and non-light-transmitting portions, wherein the non-light-transmitting portions are made of black opaque material or filled with anti-reflective particles; and

[0010] A color filter layer is located on a side of the thin-film encapsulation layer facing away from the substrate, and includes a color filter disposed above the OLED pixels; the color filter forms a first projection area based on the substrate, the OLED pixels form a second projection area based on the substrate, a non-light-transmitting portion of the organic thin film in the thin-film encapsulation layer forms a third projection area based on the substrate, a fourth projection area is formed in the first projection area after removing the intersection of the first projection area and the second projection area, and the third projection area covers the fourth projection area.

[0011] Optionally, the color filter layer further includes a black matrix arranged between adjacent color films, the contact surfaces between the black matrix and the color films are both inclined slopes, and the first slope formed by the end face of the black matrix moves away from the color film as the distance between the black matrix and the substrate increases.

[0012] Optionally, the organic light-emitting layer further includes a pixel definition layer for defining an area where the OLED pixels are located, and a surface of the pixel definition layer facing away from the substrate is coated with a black light-proof material.

[0013] Optionally, the pixel definition layer coated with a black light-proof material forms a fifth projection area based on the substrate, and the fourth projection area overlaps with the fifth projection area.

[0014] Optionally, the organic light-emitting layer further includes a pixel definition layer for defining an area where the OLED pixel is located, and the contact surfaces between the pixel definition layer and the OLED pixel are both inclined slopes, and the second slope formed by the end face of the pixel definition layer moves away from the OLED pixel as the distance between the pixel definition layer and the substrate increases, and the first slope is parallel to the second slope.

[0015] Optionally, the organic light-emitting layer further includes a pixel definition layer for defining an area where the OLED pixels are located, and the pixel definition layer is made of a black, opaque material.

[0016] Optionally, the plane where the first slope surface is located passes through the center point of the end surface of the OLED pixel close to the substrate, and the angle formed between the first slope surface and the thickness direction of the display panel ranges from 0° to 80°.

[0017] Optionally, the display panel further includes an anti-reflection film, and the anti-reflection film is located on a side of the thin film encapsulation layer away from the substrate.

[0018] Optionally, the display panel further includes a packaging cover plate, which is located on the side of the color filter layer facing away from the substrate, and the anti-reflection film is located between the color filter layer and the packaging cover plate, or on the side of the packaging cover plate facing away from the substrate.

[0019] Optionally, the display panel further includes a driving circuit layer located between the substrate and the organic light-emitting layer.

[0020] According to another aspect of the present invention, a method for manufacturing a display panel is provided, for manufacturing the above-mentioned display panel, the method comprising the following steps:

[0021] providing a substrate;

[0022] Fabricating an organic light-emitting layer on the substrate, wherein the organic light-emitting layer includes OLED pixels;

[0023] A thin film encapsulation layer is formed on a side of the organic light-emitting layer away from the substrate, wherein the thin film encapsulation layer includes multiple layers of organic thin films having light-transmitting portions and non-light-transmitting portions, wherein the non-light-transmitting portions are made of black opaque material or filled with anti-reflective particles;

[0024] A color filter layer is formed on a side of the thin film encapsulation layer facing away from the substrate. The color filter layer includes a color filter disposed above the OLED pixel. The color filter forms a first projection area based on the substrate, the OLED pixel forms a second projection area based on the substrate, and a non-light-transmitting portion of the organic thin film in the thin film encapsulation layer forms a third projection area based on the substrate. A fourth projection area is formed by removing an intersection of the first projection area and the second projection area from the first projection area. The third projection area covers the fourth projection area.

[0025] According to another aspect of the present invention, a display device is provided, comprising any one of the display panels described above.

[0026] The beneficial effects of the present invention compared with the prior art are:

[0027] The display panel, its manufacturing method, and the display device provided by the present invention provide an organic thin film layer in the thin film encapsulation layer with a non-light-transmitting portion made of black opaque material or filled with anti-reflective particles, thereby covering the reflected light transmitted from the metal wiring portion in the driving circuit layer, which is beneficial to reducing the reflectivity of the OLED device and improving the display effect of the OLED display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are incorporated into and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and it is clear that those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0029] Figure 1 It is a schematic structural diagram of a display panel in the prior art;

[0030] Figure 2 A schematic structural diagram of a display panel disclosed in one embodiment of the present invention;

[0031] Figure 3 A schematic structural diagram of a display panel disclosed in another embodiment of the present invention;

[0032] Figure 4 A schematic structural diagram of a display panel disclosed in another embodiment of the present invention;

[0033] Figure 5 A schematic structural diagram of a display panel disclosed in another embodiment of the present invention;

[0034] Figure 6 A schematic structural diagram of a display panel disclosed in another embodiment of the present invention;

[0035] Figure 7 A schematic flow chart of a method for manufacturing a display panel disclosed in one embodiment of the present invention; DETAILED DESCRIPTION

[0036] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention will be comprehensive and complete, and the concept of the example embodiments will be fully conveyed to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure can be practiced without one or more of the specific details, or other methods, materials, devices, etc. may be adopted. In other cases, well-known technical solutions are not shown or described in detail to avoid blurring various aspects of the present disclosure. The same reference numerals in the figures represent the same or similar structures, and their detailed descriptions will be omitted.

[0037] The terms "a," "an," "the," "said," and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including," "having," and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.

[0038] Figure 1 Schematic diagram of the structure of the display panel in the prior art. Figure 1 As shown, the display panel in the prior art includes a driving circuit layer 101, an organic light-emitting layer, a thin film encapsulation layer 104, a color filter layer, and an encapsulation cover plate 107 stacked in sequence. The organic light-emitting layer includes OLED pixels 102 and a pixel definition layer 103 for defining the area where the OLED pixels 102 are located. The color filter layer includes a color filter 105 arranged above the OLED pixels 102 and a black matrix 106 arranged between adjacent color filters 105. The color filter 105 corresponds to the OLED pixels 102 and is used to allow light emitted by the OLED pixels 102 to pass through. Since the light transmittance of the black matrix 106 is almost zero, the light emitted by the OLED pixels 102 can only pass through the color filter 105.

[0039] When the opening size of the color filter 105 is larger than the opening size of the OLED pixel 102 (e.g. Figure 1 The rounded rectangular frame shown is the part where the opening is larger than ), for example, it may be due to the consideration of increasing the brightness attenuation angle at a large viewing angle. In this case, the proportion of the color filter 105 on the entire display panel increases, which will correspondingly cause the proportion of the black matrix 106 on the entire panel to decrease. Since the reflectivity of the color filter 105 is greater than the reflectivity of the black matrix 106, the reflectivity of the metal trace portion in the driving circuit layer that is not covered by the black matrix 106 is also high, which will result in poor light emission of the OLED panel, which is not conducive to the display effect of the OLED panel.

[0040] like Figure 2 As shown, one embodiment of the present invention discloses a display panel. The display panel includes a substrate 201, a driving circuit layer 202, an organic light-emitting layer, a thin-film encapsulation layer 301, and a color filter layer stacked in sequence. The organic light-emitting layer is located on one side of the substrate 201 and includes OLED pixels 203 and a pixel definition layer 204 that defines the area where the OLED pixels 203 are located. Specifically, the organic light-emitting layer includes the pixel definition layer 204 and a pixel area defined by the pixel definition layer 204, and the OLED pixels 203 are located within the pixel area. The driving circuit layer 202 is located between the substrate 201 and the organic light-emitting layer.

[0041] The thin-film encapsulation layer 301 is located on the side of the organic light-emitting layer facing away from the substrate 201 and comprises multiple layers of organic thin films having light-transmitting portions 205 and non-light-transmitting portions 206. The non-light-transmitting portions 206 are made of a black, opaque material or filled with anti-reflective particles. In other words, the thin-film encapsulation layer 301 is formed by alternating layers of inorganic thin films 207 and organic thin films, wherein the organic thin films have light-transmitting portions 205 and non-light-transmitting portions 206. The projection of the light-transmitting portions 205 onto the substrate 201 overlaps with the projection of the OLED pixels 203 onto the substrate 201.

[0042] The black opaque material may be a photosensitive resin composition, which may include a binder resin, a photopolymerizable monomer, a photopolymerization initiator, a black colorant, and a solvent. The anti-reflective particles may include carbon powder particles, which may be made of materials such as titanium dioxide.

[0043] The color filter layer is located on the side of the thin-film encapsulation layer 301 facing away from the substrate 201. The color filter layer includes a color filter 208 disposed above the OLED pixels 203 and a black matrix 209 disposed between adjacent color filters 208. The color filter 208 forms a first projection area on the substrate 201, the OLED pixels 203 form a second projection area on the substrate 201, and the non-light-transmissive portion 206 of the organic thin film in the thin-film encapsulation layer 301 forms a third projection area on the substrate 201. The fourth projection area is formed by excluding the intersection of the first and second projection areas from the first projection area. The third projection area overlaps the fourth projection area. In other words, the third projection area includes the fourth projection area.

[0044] In this embodiment, the organic thin film layer in the thin film encapsulation layer 301 is configured as a non-transparent portion 206 made of black opaque material or filled with anti-reflective particles, so as to cover the reflected light transmitted from the metal wiring portion in the driving circuit layer 202, thereby reducing the reflectivity of the metal wiring portion, which is beneficial to reducing the reflectivity of the OLED device and improving the display effect of the OLED display panel.

[0045] In another embodiment of the present application, Figure 3 As shown, based on any of the above embodiments, the contact surface between the black matrix 209 in the color filter layer and the color filter 208 is an inclined slope, and the first slope formed by the end surface of the black matrix 209 moves away from the color filter 208 as the distance between the black matrix 209 and the substrate 201 increases, and gradually approaches the color filter 208 as the distance between the black matrix 209 and the substrate 201 gradually decreases. The black matrix 209 is made of a black, opaque material.

[0046] In this embodiment, the black matrix 209 is used to block the reflected light transmitted from the metal wiring in the driving circuit layer 202, which is beneficial to reducing the reflectivity of the OLED device and improving the display effect of the OLED display panel.

[0047] Optionally, in another embodiment, based on any of the above embodiments, the plane where the first slope surface is located passes through the center point of the end surface of the OLED pixel 203 close to the substrate 201, and the angle formed between the first slope surface and the thickness direction of the display panel (such as Figure 3 The range of α) shown is 0° to 80°.

[0048] Figure 3 The α in the figure is the brightness attenuation angle at a large viewing angle. By adopting an inclined pattern design for the contact end surface of the black matrix 209 and the color film 208, the brightness attenuation angle at a large viewing angle is increased while ensuring the low reflectivity of the OLED panel. This is beneficial to enhancing the outdoor visibility function of the OLED panel and avoiding the problem of increasing the reflectivity of the OLED panel due to the need to increase the opening size of the color film 208.

[0049] It should be noted that the thin film encapsulation layer 301 in this embodiment can adopt the structural design in the above embodiment, or can adopt the conventional encapsulation structure design in the prior art, that is, the above embodiment implemented using a thin film encapsulation layer with a conventional structure is also within the scope of protection of this application.

[0050] In another embodiment of the present application, based on any of the above embodiments, the pixel definition layer 204 is made of the aforementioned opaque black material. By using the opaque black pixel definition layer 204 to block reflected light from the metal traces in the drive circuit layer 202, the reflectivity of the metal traces can be reduced, thereby lowering the reflectivity of the OLED device and improving the display quality of the OLED display panel.

[0051] In another embodiment, if Figure 4 As shown, based on any of the above embodiments, the surface of the pixel definition layer 204 facing away from the substrate 201 is coated with a black opaque material to form a black pixel definition layer 401. This allows the pixel definition layer 204 to be made of a black opaque material on only one side, while still shielding the reflected light from the metal traces in the drive circuit layer 202. This saves process time and reduces panel production costs and time.

[0052] Alternatively, in another embodiment, Figure 5As shown, the pixel definition layer 204, coated with a black opaque material, forms a fifth projection area on the substrate 201, with the fourth projection area overlapping the fifth projection area. In other words, the black opaque material only needs to be applied to a portion of one side of the pixel definition layer 204, with the black pixel definition layer 401 covering only that portion of the pixel definition layer. This eliminates the need to entirely coat the entire side with black opaque material, while still effectively shielding the metal traces in the drive circuit layer 202 from reflected light. This can streamline the display panel manufacturing process, thereby reducing panel production costs and time.

[0053] The black light-proof material may be a photosensitive resin composition including a binder resin, a photopolymerizable monomer, a photopolymerization initiator, a black colorant, a solvent, and the like.

[0054] Alternatively, in another embodiment, reference may be made to Figure 3 The contact surfaces between the pixel definition layer 204 and the OLED pixels 203 are both inclined slopes, and the second slope formed by the end surface of the pixel definition layer 204 moves away from the OLED pixels 203 as the distance between the pixel definition layer 204 and the substrate 201 increases. In this embodiment, the first slope and the second slope are parallel, which helps increase the brightness attenuation angle at a wide viewing angle and enhance the outdoor visibility of the OLED panel.

[0055] In another embodiment of the present application, based on any of the above embodiments, as Figure 6 As shown, the display panel further includes an anti-reflection film 601 and a packaging cover plate 602. The packaging cover plate 602 is located on the side of the color filter layer away from the substrate 201. In this embodiment, the anti-reflection film 601 is located between the color filter layer and the packaging cover plate 602. In other embodiments, the anti-reflection film 601 may also be located on the side of the packaging cover plate 602 away from the substrate 201, or on the side of the thin film packaging layer 301 away from the substrate 201, or between the thin film packaging layer 301 and the color filter layer. The anti-reflection film 601 can be used to reduce the reflected light transmitted from the metal wiring portion in the driving circuit layer 202, which is beneficial to reducing the reflectivity of the OLED device and improving the display effect of the OLED display panel.

[0056] Anti-reflection film 601 can be formed by two or more layers of alternate stacking comprising a metallic film (Cr, Mo, Ti etc.) and a dielectric film (the dielectric material is SiO2 etc.). Ambient light is absorbed or emitted by the metallic film, and the dielectric film can regulate or compensate for the phase difference of light, causing light to destructively interfere, reduce reflection, and improve contrast. The transmittance of anti-reflection film 601 is greater than 44%. This anti-reflection film 601 utilizes prior art to realize, and the present embodiment will not repeat them.

[0057] The anti-reflection film 601 may be an anti-reflection anti-reflection film, which includes an optical anti-reflection film, wherein the thickness of the optical anti-reflection film is 1 / 4 of the wavelength of visible light.

[0058] It should be noted that all the above embodiments in this application can be implemented in any combination, and the embodiments obtained after the combination are all within the protection scope of this application.

[0059] like Figure 7 As shown, an embodiment of the present application further discloses a method for manufacturing a display panel, which is used to manufacture the display panel disclosed in the above embodiment. The manufacturing method includes the following steps:

[0060] S10, providing a substrate.

[0061] S20, forming an organic light-emitting layer on the substrate. The organic light-emitting layer includes OLED pixels.

[0062] S30: Form a thin film encapsulation layer on the side of the organic light-emitting layer facing away from the substrate. The thin film encapsulation layer comprises multiple layers of organic thin films having light-transmitting portions and non-light-transmitting portions. The non-light-transmitting portions are made of black opaque material or filled with anti-reflective particles.

[0063] S40: Form a color filter layer on the side of the thin-film encapsulation layer facing away from the substrate. The color filter layer includes a color filter disposed above the OLED pixels. The color filter forms a first projection area based on the substrate, the OLED pixels form a second projection area based on the substrate, and the non-transparent portion of the organic thin film in the thin-film encapsulation layer forms a third projection area based on the substrate. The fourth projection area is formed by excluding the intersection of the first and second projection areas from the first projection area. The third projection area overlaps the fourth projection area.

[0064] One embodiment of the present invention further discloses a display device, comprising the display panel disclosed in any of the above embodiments. The detailed structural features and advantages of the display panel can be found in the description of the above embodiments and will not be repeated here. In specific implementations, the display device provided in the embodiments of the present disclosure can be any product or component with a display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, media player, watch device, pendant device, earphone or headphone device, navigation device, wearable or miniature device, electronic device with a display installed in a self-service terminal or an embedded device in a car system.

[0065] In summary, the display panel, manufacturing method thereof, and display device disclosed in this application have at least the following advantages:

[0066] The display panel, its manufacturing method, and the display device disclosed in the present application are configured with an organic thin film layer in the thin film encapsulation layer using a black opaque material or a non-transparent portion filled with anti-reflective particles, and / or using an inclined pattern design on the contact end surface of the black matrix and the color film, and / or using a black material for the pixel definition layer, so as to cover the reflected light transmitted through the metal wiring portion in the driving circuit layer, thereby reducing the reflectivity of the OLED device and improving the display effect of the OLED display panel.

[0067] On the other hand, the contact end surface of the black matrix and the color film adopts an inclined pattern design, which increases the wide viewing angle brightness attenuation angle while ensuring the low reflectivity of the OLED panel, which is beneficial to enhancing the outdoor visibility function of the OLED panel and avoiding the need to increase the color film opening size and thus increase the reflectivity of the OLED panel.

[0068] In the description of the present invention, it should be understood that the terms "bottom", "longitudinal", "lateral", "upper", "lower", "front", "back", "vertical", "horizontal", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more, and "several" means one or more.

[0069] Throughout this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," and "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. Throughout this specification, illustrative uses of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0070] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all of these should be considered to fall within the scope of protection of the present invention.

Claims

1. A display panel, characterized in that: include: substrate; an organic light-emitting layer, located on one side of the substrate, the organic light-emitting layer including OLED pixels; a thin film encapsulation layer, located on the side of the organic light-emitting layer away from the substrate, comprising multiple layers of organic thin films having light-transmitting portions and non-light-transmitting portions, wherein the non-light-transmitting portions are made of black opaque material or filled with anti-reflective particles; and a color filter layer, located on a side of the thin-film encapsulation layer facing away from the substrate, comprising a color filter disposed above the OLED pixels; the color filter forming a first projection area based on the substrate, the OLED pixels forming a second projection area based on the substrate, a non-light-transmissive portion of the organic thin film in the thin-film encapsulation layer forming a third projection area based on the substrate, a fourth projection area formed by removing the intersection of the first and second projection areas from the first projection area, the third projection area covering the fourth projection area; the color filter layer further comprising a black matrix disposed between adjacent color filters, the contact surfaces between the black matrix and the color filters both being inclined slopes, and a first slope formed by an end surface of the black matrix moving away from the color filter as the distance between the black matrix and the substrate increases; The organic light-emitting layer further includes a pixel definition layer for defining an area where the OLED pixels are located, wherein the contact surfaces between the pixel definition layer and the OLED pixels are both inclined slopes, and a second slope formed by an end surface of the pixel definition layer moves away from the OLED pixels as the distance between the pixel definition layer and the substrate increases, and the first slope is parallel to the second slope. The surface of the pixel definition layer facing away from the substrate is coated with a black opaque material. The pixel definition layer coated with the black opaque material forms a fifth projection area based on the substrate, and the fourth projection area overlaps with the fifth projection area.

2. The display panel according to claim 1, wherein The organic light emitting layer further includes a pixel definition layer for defining an area where the OLED pixels are located. The material of the pixel definition layer is a black, opaque material.

3. The display panel according to claim 1, wherein The plane where the first slope surface is located passes through the center point of the end surface of the OLED pixel close to the substrate, and the angle formed between the first slope surface and the thickness direction of the display panel ranges from 0° to 80°.

4. The display panel according to claim 1, wherein: The display panel further includes an anti-reflection film, and the anti-reflection film is located on a side of the thin film encapsulation layer away from the substrate.

5. The display panel according to claim 4, wherein: The display panel further includes a packaging cover plate, which is located on the side of the color filter layer away from the substrate. The anti-reflection film is located between the color filter layer and the packaging cover plate, or on the side of the packaging cover plate away from the substrate.

6. The display panel according to claim 1, wherein: The display panel further includes a driving circuit layer located between the substrate and the organic light-emitting layer.

7. A method for manufacturing a display panel, characterized in that: The method for manufacturing the display panel according to claim 1 comprises the following steps: providing a substrate; Fabricating an organic light-emitting layer on the substrate, wherein the organic light-emitting layer includes OLED pixels; A thin film encapsulation layer is formed on a side of the organic light-emitting layer away from the substrate, wherein the thin film encapsulation layer includes multiple layers of organic thin films having light-transmitting portions and non-light-transmitting portions, wherein the non-light-transmitting portions are made of black opaque material or filled with anti-reflective particles; A color filter layer is formed on a side of the thin film encapsulation layer facing away from the substrate. The color filter layer includes a color filter disposed above the OLED pixel. The color filter forms a first projection area based on the substrate, the OLED pixel forms a second projection area based on the substrate, and a non-light-transmitting portion of the organic thin film in the thin film encapsulation layer forms a third projection area based on the substrate. A fourth projection area is formed by removing an intersection of the first projection area and the second projection area from the first projection area. The third projection area covers the fourth projection area.

8. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 6.

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