Display panel, manufacturing method thereof and display device

Abstract

The invention provides a display panel, a manufacturing method thereof and a display device, and belongs to the technical field of display. The display panel includes: a driving substrate; the light-emitting unit and the pixel defining layer are located on the driving substrate, the light-emitting unit is located in an area defined by the pixel defining layer, and the pixel defining layer is made of a shading material; the color film layer and the black matrix are located on the light-emitting side of the light-emitting unit; wherein a shading pattern of the display panel comprises an edge part and a center part, the thickness of the edge part is gradually reduced in the direction away from the center part, and the shading pattern is at least one of the black matrix and the pixel defining layer. The diffraction phenomenon of the display panel can be reduced.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, and in particular to a display panel, a manufacturing method thereof, and a display device. BACKGROUND

[0002] OLED (Organic Light-Emitting Diode) display devices have been listed as the next generation display technology with great development prospects due to their advantages such as thinness, lightness, wide viewing angle, active light-emitting, continuous adjustable light-emitting color, low cost, fast response speed, small energy consumption, low driving voltage, wide operating temperature range, simple production process, high light-emitting efficiency, and flexible display. SUMMARY

[0003] Embodiments of the present application provide a display panel, a manufacturing method thereof, and a display device, which can reduce the diffraction phenomenon of the display panel.

[0004] To solve the above technical problems, the present application is implemented as follows:

[0005] The present application provides a display panel, comprising:

[0006] a driving substrate;

[0007] a light-emitting unit and a pixel definition layer on the driving substrate, the light-emitting unit being located in an area defined by the pixel definition layer, and the pixel definition layer being made of light-shielding material;

[0008] a color film layer and a black matrix on the light-emitting unit light-emitting side;

[0009] wherein the light-shielding pattern of the display panel comprises an edge portion and a center portion, the thickness of the edge portion gradually decreases in a direction away from the center portion, and the light-shielding pattern is at least one of the black matrix and the pixel definition layer.

[0010] In some embodiments, the cross section of the light-shielding pattern in a first direction is trapezoidal, the first direction being perpendicular to the driving substrate and perpendicular to the extension direction of the light-shielding pattern.

[0011] In some embodiments, the angle between the side surface of the light-shielding pattern and the plane where the driving substrate is located is less than 10°.

[0012] In some embodiments, the display panel further comprises a protruding structure on the side of the light-shielding pattern facing the driving substrate, the cross section of the protruding structure in a second direction is trapezoidal, the orthographic projection of the protruding structure on the driving substrate is located within the orthographic projection of the light-shielding pattern on the driving substrate, and the second direction is perpendicular to the driving substrate and perpendicular to the extension direction of the protruding structure.

[0013] In some embodiments, an angle between a side surface of the protruding structure and a plane where the driving substrate is located is 50-70°.

[0014] In some embodiments, a normal projection of the edge portion on the driving substrate overlaps with a part of a normal projection of the pixel opening sidewall on the driving substrate.

[0015] In some embodiments, a normal projection of the opening defined by the black matrix on the driving substrate covers a normal projection of the pixel opening on the driving substrate.

[0016] Embodiments of the present application also provide a display device comprising the display panel as described above.

[0017] Embodiments of the present application also provide a manufacturing method of a display panel, for manufacturing the display panel as described above, the manufacturing method comprising:

[0018] forming a driving substrate;

[0019] forming a light emitting unit and a pixel defining layer on the driving substrate, the light emitting unit being located in an area defined by the pixel defining layer, the pixel defining layer being made of light shielding material;

[0020] forming a color filter layer and a black matrix on a light emitting side of the light emitting unit;

[0021] wherein the light shielding pattern of the display panel comprises an edge portion and a center portion, a thickness of the edge portion gradually decreases in a direction away from the center portion, and the light shielding pattern is at least one of the black matrix and the pixel defining layer.

[0022] In some embodiments, forming the light shielding pattern comprises:

[0023] forming a layer of light shielding material, the light shielding material being made of negative photosensitive material;

[0024] exposing the light shielding material to light using a mask plate, and developing to form the light shielding pattern, wherein the mask plate comprises an opaque area and a partially transparent area located around the opaque area, a transmittance of the partially transparent area gradually increases in a direction away from the opaque area, and the opaque area corresponds to an opening area defined by the light shielding pattern.

[0025] The opaque region is circular, the partial light-transmitting region comprises a plurality of annular opaque patterns surrounding the opaque region, the opaque patterns are circular, and the arrangement density of the opaque patterns gradually decreases in a direction away from the opaque region; or the opaque region is circular, the partial light-transmitting region comprises a sawtooth-shaped opaque pattern arranged around the opaque region, and the size of the sawtooth-shaped opaque pattern gradually decreases in a direction away from the opaque region.

[0026] In the embodiment of the present application, the thickness of the edge portion of the light-shielding pattern gradually decreases in a direction away from the center portion of the light-shielding pattern, so that the transmittance and reflectance of the edge portion of the light-shielding pattern gradually change, a reflectance gradient region is formed at the boundary of the light-shielding pattern, the reflectance boundary at the boundary of the light-shielding pattern is blurred, and the diffraction phenomenon of the display panel is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic view of a cross section of a display panel;

[0028] Figure 2 is a schematic view of the boundary of a black matrix and the boundary of a pixel definition layer;

[0029] Figure 3 is a schematic view of a mask plate according to an embodiment of the present application;

[0030] Figure 4 is a schematic view of a light-shielding pattern according to an embodiment of the present application;

[0031] Figure 5 is a schematic view of a mask plate according to another embodiment of the present application;

[0032] Figure 6 is a schematic view of a light-shielding pattern according to another embodiment of the present application;

[0033] Figure 7 is a schematic view of a cross section of a display panel according to an embodiment of the present application;

[0034] Figure 8 is a schematic view of a cross section of a display panel according to another embodiment of the present application;

[0035] Figure 9 is a schematic view of a display panel according to an embodiment of the present application and a schematic view of an existing display panel under irradiation of ambient light.

[0036] REFERENCE SIGNS

[0037] 01 driving substrate; 10 package cover plate; 111 blue filter unit; 112 green filter unit;

[0038] 113 Red filter unit; 114 Black matrix; 12 Encapsulation layer; 13 Emitting layer;

[0039] 14. Pixel boundary layer; 21. Boundary of the black matrix; 22. Boundary of the pixel boundary layer;

[0040] 31 Pixel Delimiter Layer; 32 Encapsulation Layer; 33 Black Matrix; 34 Red Filter Unit;

[0041] 41 Encapsulation cover; 421 Blue filter unit; 422 Green filter unit;

[0042] 423 Red filter unit; 424 Black matrix; 43 Encapsulation layer; 44 Pixel boundary layer;

[0043] 45. Emissive layer; 46. Planarization layer. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "connected" or "linked," and similar terms, are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship also changes accordingly.

[0046] To increase the transmittance and reduce the power consumption of the display panel, an OLED display panel with a COE (Color Filter on Encapsulation, where the color filter is placed on the encapsulation layer) structure can be used.

[0047] like Figure 1As shown, the OLED display panel of the COE structure includes: a driving substrate 01; a pixel defining layer 14 and a light emitting layer 13 disposed on the driving substrate 01; an encapsulation layer 12; a black matrix 114 and a color filter unit on the encapsulation layer 12, the color filter unit is located in the area defined by the black matrix 114, in some embodiments, the color filter unit can include a blue filter unit 111, a green filter unit 112 and a red filter unit 113; an encapsulation cover plate 10.

[0048] The black matrix 114 and the pixel defining layer 14 are made of light shielding materials, such as Figure 2 As shown, the black matrix 114 and the pixel defining layer 14 define a high reflectivity area and a low reflectivity area with clear boundaries, wherein 21 is the boundary of the black matrix, and 22 is the boundary of the pixel defining layer. Moreover, the OLED display panel adopts a strict periodic arrangement, which will cause serious diffraction (color separation) phenomenon of the OLED display panel when the external environment light is incident, affecting the display effect of the OLED display panel.

[0049] The embodiments of the present application provide a display panel and a manufacturing method thereof, and a display device, which can reduce the diffraction phenomenon of the display panel.

[0050] The present application provides a display panel, comprising:

[0051] a driving substrate;

[0052] a light emitting unit and a pixel defining layer on the driving substrate, the light emitting unit is located in the area defined by the pixel defining layer, and the pixel defining layer is made of light shielding materials;

[0053] a color film layer and a black matrix on the light emitting unit light emitting side;

[0054] The light shielding pattern of the display panel includes an edge portion and a center portion, and the thickness of the edge portion gradually decreases in the direction away from the center portion, and the light shielding pattern is at least one of the black matrix and the pixel defining layer.

[0055] In the embodiments of the present application, the thickness of the edge portion of the light shielding pattern gradually decreases in the direction away from the center portion of the light shielding pattern, so that the transmittance and reflectivity of the edge portion of the light shielding pattern gradually change, a reflectivity gradient area is formed at the boundary of the light shielding pattern, the reflectivity boundary at the boundary of the light shielding pattern is blurred, the diffraction phenomenon of the display panel is greatly reduced, and the display effect of the display panel is improved.

[0056] In the embodiment, the edge portion of the light shielding pattern is overlapped with the part of the orthographic projection of the pixel opening sidewall on the driving substrate, and the orthographic projection of the opening defined by the black matrix on the driving substrate covers the orthographic projection of the pixel opening on the driving substrate. The light shielding pattern can be the black matrix, and the thickness of the edge portion of the black matrix gradually decreases in the direction away from the central portion of the black matrix. In this way, the transmittance of the edge portion of the black matrix gradually changes, the reflectivity of the black matrix is inversely proportional to the transmittance, so that the reflectivity of the edge portion of the black matrix gradually changes, a reflectivity gradient area is formed at the boundary of the black matrix, the reflectivity boundary at the boundary of the black matrix is blurred, and the diffraction phenomenon of the display panel is reduced.

[0057] In the embodiment, the light shielding pattern can also be the pixel defining layer, and the thickness of the edge portion of the pixel defining layer gradually decreases in the direction away from the central portion of the pixel defining layer. In this way, the transmittance of the edge portion of the pixel defining layer gradually changes, the reflectivity of the pixel defining layer is inversely proportional to the transmittance, so that the reflectivity of the edge portion of the pixel defining layer gradually changes, a reflectivity gradient area is formed at the boundary of the pixel defining layer, the reflectivity boundary at the boundary of the pixel defining layer is blurred, and the diffraction phenomenon of the display panel is reduced.

[0058] In the embodiment, the light shielding pattern can also include the black matrix and the pixel defining layer at the same time, the thickness of the edge portion of the black matrix gradually decreases in the direction away from the central portion of the black matrix. In this way, the transmittance of the edge portion of the black matrix gradually changes, the reflectivity of the black matrix is inversely proportional to the transmittance, so that the reflectivity of the edge portion of the black matrix gradually changes, a reflectivity gradient area is formed at the boundary of the black matrix, the reflectivity boundary at the boundary of the black matrix is blurred; the thickness of the edge portion of the pixel defining layer gradually decreases in the direction away from the central portion of the pixel defining layer. In this way, the transmittance of the edge portion of the pixel defining layer gradually changes, the reflectivity of the pixel defining layer is inversely proportional to the transmittance, so that the reflectivity of the edge portion of the pixel defining layer gradually changes, a reflectivity gradient area is formed at the boundary of the pixel defining layer, the reflectivity boundary at the boundary of the pixel defining layer is blurred, and the diffraction phenomenon of the display panel is reduced.

[0059] In the embodiment, the mask plate for making the light shielding pattern can be designed. In some embodiments, the mask plate for making the black matrix and the pixel definition layer can include a non-light-transmitting region and a partially light-transmitting region located around the non-light-transmitting region, the light transmission rate of the partially light-transmitting region gradually increases in the direction away from the non-light-transmitting region, wherein the non-light-transmitting region corresponds to the opening region defined by the light shielding pattern, the light shielding pattern can be made of a negative photosensitive material, after the negative photosensitive material for making the light shielding pattern is formed, the negative photosensitive material is exposed by using the mask plate, and after development, the central part of the light shielding pattern is formed at the position corresponding to the non-light-transmitting region, and the edge part of the light shielding pattern is formed at the position corresponding to the partially light-transmitting region, since the light transmission rate of the partially light-transmitting region gradually increases in the direction away from the non-light-transmitting region, the thickness of the edge part of the light shielding pattern gradually decreases in the direction away from the central part of the light shielding pattern.

[0060] In some embodiments, the shape of the mask plate can be as shown in Figure 3 The non-light-transmitting region C1 is a Figure 3 largest circle, and the partially light-transmitting region includes a plurality of annular non-light-transmitting patterns C2 surrounding the non-light-transmitting region C1, the non-light-transmitting patterns C2 are circles, and the arrangement density of the non-light-transmitting patterns C2 gradually decreases in the direction away from the non-light-transmitting region C1, so that the light transmission rate of the partially light-transmitting region gradually increases in the direction away from the non-light-transmitting region C1.

[0061] The light shielding pattern can be made of a negative photosensitive material, after the negative photosensitive material for making the light shielding pattern is formed, the negative photosensitive material is exposed by using the mask plate as shown in Figure 3 , and after development, the light shielding pattern as shown in Figure 4 can be formed. Since the amount of light received by the negative photosensitive material is gradually changed during exposure, the light shielding pattern with gradually changed thickness can be made, so that the light shielding pattern with gradually changed light transmission rate of the edge part is obtained.

[0062] In some embodiments, the shape of the mask plate can be as shown in Figure 5 The non-light-transmitting region C1 is a circle, and the partially light-transmitting region includes a sawtooth-shaped non-light-transmitting pattern C3 arranged around the non-light-transmitting region C1, the size of the sawtooth-shaped non-light-transmitting pattern C3 gradually decreases in the direction away from the non-light-transmitting region C1, so that the light transmission rate of the partially light-transmitting region gradually increases in the direction away from the non-light-transmitting region C1.

[0063] The light shielding pattern can be made of a negative photosensitive material, after the negative photosensitive material for making the light shielding pattern is formed, the negative photosensitive material is exposed by using the mask plate as shown in Figure 5 , and after development, the light shielding pattern as shown inFigure 6 The light shielding pattern shown. When exposed, since the amount of light received by the negative photosensitive material is gradually changed, a light shielding pattern with gradually changing thickness can be made, thereby obtaining a light shielding pattern with gradually changing transmittance at the edge portion.

[0064] Of course, the shape of the mask plate used in this embodiment is not limited to the shape shown in Figure 3 and Figure 5 Other shapes can also be used.

[0065] In some embodiments, the cross section of the light shielding pattern in the first direction is a trapezoid, the first direction being perpendicular to the driving substrate and perpendicular to the extension direction of the light shielding pattern, wherein the extension direction of the light shielding pattern is the direction of the light shielding pattern in the plane parallel to the driving substrate, and the angle between the side surface of the light shielding pattern and the plane of the driving substrate is less than 10°, so that the thickness of the edge portion of the light shielding pattern gradually decreases. The smaller the angle between the side surface of the light shielding pattern and the plane of the driving substrate, the more uniform the change in transmittance of the edge portion of the light shielding pattern, and the more uniform the change in reflectivity of the edge portion of the light shielding pattern, which can better improve the diffraction of the display panel.

[0066] For example, the light shielding pattern includes a black matrix and a pixel definition layer, as shown in Figure 7As shown, the display panel includes a pixel definition layer 31, an encapsulation layer 32, a black matrix 33, and a red filter unit 34. The black matrix 33 defines an opening region B. The black matrix 33 includes edge portions A and C. The normal projection of the edge portions A and C on the driving substrate partially overlaps the normal projection of the pixel opening sidewall on the driving substrate. The normal projection of the opening defined by the black matrix 33 covers the normal projection of the pixel opening on the driving substrate. In the direction close to the opening region B, the thickness of the edge portions A and C gradually decreases. The transmittance of the black matrix 33 changes with the film thickness. In this way, the transmittance of the edge portions A and C gradually increases, and the reflectivity of the edge portions A and C gradually decreases. A reflectivity gradient region is formed at the boundary of the black matrix 33, so that the reflectivity boundary at the boundary of the black matrix 33 is blurred. The pixel definition layer 31 defines an opening region E. The pixel definition layer 31 includes edge portions D and F. The normal projection of the edge portions D and F on the driving substrate partially overlaps the normal projection of the pixel opening sidewall on the driving substrate. In the direction close to the opening region E, the thickness of the edge portions D and F gradually decreases. The transmittance of the edge portions D and F changes with the film thickness. In this way, the transmittance of the edge portions D and F gradually increases, and the reflectivity of the edge portions D and F gradually decreases. A reflectivity gradient region is formed at the boundary of the pixel definition layer 31, so that the reflectivity boundary at the boundary of the pixel definition layer 31 is blurred. In some examples, the film thickness of the central portion of the black matrix 33 and the pixel definition layer 31 can be about 1 micrometer. The width of the edge portions A and C in the third direction can be 6-8 micrometers. The width of the edge portions D and F in the third direction can be 2-3 micrometers. In other examples, the film thickness of the central portion of the black matrix 33 and the pixel definition layer 31 can be about 1.5 micrometers. The width of the edge portions A and C in the third direction can be 7-9 micrometers. The width of the edge portions D and F in the third direction can be 2-3 micrometers.

[0067] Figure 9 The left side is a schematic diagram of the existing display panel under the irradiation of ambient light, and the right side is a schematic diagram of the display panel of the embodiment of the present application under the irradiation of ambient light. As can be seen, the technical solution of the embodiment of the present application makes the reflectivity boundary at the boundary of the pixel definition layer blurred, which can greatly reduce the diffraction phenomenon of the display panel. Figure 9

[0068] ​In some embodiments, the display panel further comprises a protruding structure on the side of the light shielding pattern facing the driving substrate, a cross section of the protruding structure in a second direction is trapezoidal, a normal projection of the protruding structure on the driving substrate is located in a normal projection of the light shielding pattern on the driving substrate, the second direction is perpendicular to the driving substrate and perpendicular to the extending direction of the protruding structure, so that the light shielding pattern formed on the protruding structure can form a light shielding pattern with gradually changing thickness at the edge portion, specifically, the central axis of the light shielding pattern coincides with the central axis of the corresponding protruding structure, and the edge portion of the light shielding pattern is formed on the side surface of the corresponding protruding structure.

[0069] The angle between the side surface of the protruding structure and the plane where the driving substrate is located can be 50-70°, so that a transmittance gradient region can be effectively formed at the boundary of the light shielding pattern, and a reflectivity gradient region can be effectively formed at the boundary of the light shielding pattern, so that the reflectivity boundary at the boundary of the light shielding pattern is blurred, and the diffraction phenomenon of the display panel is greatly reduced.

[0070] Taking the light shielding pattern comprising a black matrix and a pixel defining layer as an example, as shown in Figure 8 The display panel comprises a driving substrate 01, a planar layer (OC) 46 located on the driving substrate 01, a pixel defining layer 44, a light emitting layer 45, an encapsulation layer 43, a color filter unit, and a black matrix 424, wherein the color filter unit can comprise a red filter unit 423, a green filter unit 422, and a blue filter unit 421. The planar layer 46 is formed with a protruding structure at a position corresponding to the pixel defining layer 44, so that after the pixel defining layer 44 is formed on the planar layer 46, the thickness of the edge portion I and the edge portion J of the pixel defining layer 44 can gradually decrease in the direction close to the opening region of the pixel defining layer, the transmittance of the edge portion I and the edge portion J changes with the film thickness, so that the transmittance of the edge portion I and the edge portion J gradually increases, and correspondingly, the reflectivity of the edge portion I and the edge portion J gradually decreases, a reflectivity gradient region is formed at the boundary of the pixel defining layer 44, so that the reflectivity boundary at the boundary of the pixel defining layer 44 is blurred, and the diffraction of the display panel is improved. The encapsulation layer 43 is formed with a protruding structure at a position corresponding to the black matrix 424, so that after the black matrix 424 is formed on the encapsulation layer 43, the thickness of the edge portion K and the edge portion H of the black matrix 424 can gradually decrease in the direction close to the opening region of the black matrix, the transmittance of the edge portion K and the edge portion H changes with the film thickness, so that the transmittance of the edge portion K and the edge portion H gradually increases, and correspondingly, the reflectivity of the edge portion K and the edge portion H gradually decreases, a reflectivity gradient region is formed at the boundary of the black matrix 424, so that the reflectivity boundary at the boundary of the black matrix 424 is blurred, and the diffraction of the display panel is improved.

[0071] Figure 9The left side is a schematic diagram of a diffraction light ring of an existing display panel under environmental light irradiation, Figure 9 The right side is a schematic diagram of a display panel of an embodiment of the present application under environmental light irradiation. As can be seen, the use of the technical solution of the embodiment of the present application makes the reflectivity boundary at the boundary of the pixel definition layer blurred, which can greatly reduce the diffraction phenomenon of the display panel.

[0072] The embodiment of the present application also provides a display device comprising the display panel as described above.

[0073] The display device includes, but is not limited to, a radio frequency unit, a network module, an audio output unit, an input unit, a sensor, a display unit, a user input unit, an interface unit, a memory, a processor, and a power supply, and the like. Those skilled in the art can understand that the structure of the display device described above does not constitute a limitation on the display device, and the display device can include more or fewer components described above, or combine certain components, or different component arrangements. In the embodiments of the present application, the display device includes, but is not limited to, a display, a mobile phone, a tablet computer, a television, a wearable electronic device, a navigation display device, and the like.

[0074] The display device can be a television, a display, a digital photo frame, a mobile phone, a tablet computer, or any product or component with display function, wherein the display device further includes a flexible circuit board, a printed circuit board, and a back plate.

[0075] The embodiment of the present application also provides a manufacturing method of a display panel, used to manufacture the display panel as described above, and the manufacturing method comprises:

[0076] forming a driving substrate;

[0077] forming a light emitting unit and a pixel definition layer on the driving substrate, the light emitting unit being located in an area defined by the pixel definition layer, and the pixel definition layer being made of a light shielding material;

[0078] forming a color film layer and a black matrix on a light emitting side of the light emitting unit;

[0079] The light shielding pattern of the display panel includes an edge portion and a center portion, and the thickness of the edge portion gradually decreases in a direction away from the center portion, and the light shielding pattern is at least one of the black matrix and the pixel definition layer.

[0080] In the embodiment of the present application, the thickness of the edge portion of the light shielding pattern gradually decreases in a direction away from the center portion of the light shielding pattern, which can make the transmittance and reflectivity of the edge portion of the light shielding pattern gradually change, form a reflectivity gradient area at the boundary of the light shielding pattern, make the reflectivity boundary at the boundary of the light shielding pattern blurred, and greatly reduce the diffraction phenomenon of the display panel.

[0081] In the embodiment, the light-shielding pattern can be a black matrix. The thickness of the edge portion of the black matrix gradually decreases in a direction away from the central portion of the black matrix. In this way, the transmittance of the edge portion of the black matrix gradually changes. The reflectivity of the black matrix is inversely proportional to the transmittance. Therefore, the reflectivity of the edge portion of the black matrix gradually changes. A reflectivity gradient region is formed at the boundary of the black matrix. The reflectivity boundary at the boundary of the black matrix is blurred. Therefore, the diffraction phenomenon of the display panel is reduced.

[0082] In the embodiment, the light-shielding pattern can also be a pixel definition layer. The thickness of the edge portion of the pixel definition layer gradually decreases in a direction away from the central portion of the pixel definition layer. In this way, the transmittance of the edge portion of the pixel definition layer gradually changes. The reflectivity of the pixel definition layer is inversely proportional to the transmittance. Therefore, the reflectivity of the edge portion of the pixel definition layer gradually changes. A reflectivity gradient region is formed at the boundary of the pixel definition layer. The reflectivity boundary at the boundary of the pixel definition layer is blurred. Therefore, the diffraction phenomenon of the display panel is reduced.

[0083] In the embodiment, the light-shielding pattern can also include the black matrix and the pixel definition layer. The thickness of the edge portion of the black matrix gradually decreases in a direction away from the central portion of the black matrix. In this way, the transmittance of the edge portion of the black matrix gradually changes. The reflectivity of the black matrix is inversely proportional to the transmittance. Therefore, the reflectivity of the edge portion of the black matrix gradually changes. A reflectivity gradient region is formed at the boundary of the black matrix. The reflectivity boundary at the boundary of the black matrix is blurred. The thickness of the edge portion of the pixel definition layer gradually decreases in a direction away from the central portion of the pixel definition layer. In this way, the transmittance of the edge portion of the pixel definition layer gradually changes. The reflectivity of the pixel definition layer is inversely proportional to the transmittance. Therefore, the reflectivity of the edge portion of the pixel definition layer gradually changes. A reflectivity gradient region is formed at the boundary of the pixel definition layer. The reflectivity boundary at the boundary of the pixel definition layer is blurred. Therefore, the diffraction phenomenon of the display panel is reduced.

[0084] In some embodiments, forming the light-shielding pattern includes:

[0085] forming a layer of light-shielding material, the light-shielding material being a negative photosensitive material;

[0086] exposing the light-shielding material to light using a mask plate, the mask plate including a non-transmissive region and a partially transmissive region located around the non-transmissive region, the transmittance of the partially transmissive region gradually increasing in a direction away from the non-transmissive region, and developing the light-shielding material to form the light-shielding pattern, the non-transmissive region corresponding to an opening region defined by the light-shielding pattern.

[0087] In the embodiment, the mask plate for making the light shielding pattern can be designed. In some embodiments, the mask plate for making the black matrix and the pixel definition layer can include a non-light-transmitting region and a partially light-transmitting region located around the non-light-transmitting region, the light transmission rate of the partially light-transmitting region gradually increases in a direction away from the non-light-transmitting region, wherein the non-light-transmitting region corresponds to the opening region defined by the light shielding pattern, the light shielding pattern can be made of a negative photosensitive material, after the negative photosensitive material for making the light shielding pattern is formed, the negative photosensitive material is exposed by using the mask plate, and after development, the central part of the light shielding pattern is formed at the position corresponding to the non-light-transmitting region, and the edge part of the light shielding pattern is formed at the position corresponding to the partially light-transmitting region. Since the light transmission rate of the partially light-transmitting region gradually increases in a direction away from the non-light-transmitting region, the thickness of the edge part of the light shielding pattern gradually decreases in a direction away from the central part of the light shielding pattern.

[0088] In some embodiments, the shape of the mask plate can be as shown in Figure 3 , the non-light-transmitting region C1 is a Figure 3 largest circle, and the partially light-transmitting region includes a plurality of annular non-light-transmitting patterns C2 surrounding the non-light-transmitting region C1, the non-light-transmitting patterns C2 are circles, and the arrangement density of the non-light-transmitting patterns C2 gradually decreases in a direction away from the non-light-transmitting region C1, so that the light transmission rate of the partially light-transmitting region gradually increases in the direction away from the non-light-transmitting region C1.

[0089] The light shielding pattern can be made of a negative photosensitive material, after the negative photosensitive material for making the light shielding pattern is formed, the negative photosensitive material is exposed by using the mask plate as shown in Figure 3 , and after development, the light shielding pattern as shown in Figure 4 is formed. Since the amount of light received by the negative photosensitive material is gradually changed during exposure, the light shielding pattern with gradually changed thickness can be made, so that the light shielding pattern with gradually changed light transmission rate of the edge part is obtained.

[0090] In some embodiments, the shape of the mask plate can also be as shown in Figure 5 , the non-light-transmitting region C1 is a circle, and the partially light-transmitting region includes a sawtooth-shaped non-light-transmitting pattern C3 arranged around the non-light-transmitting region C1, the size of the sawtooth-shaped non-light-transmitting pattern C3 gradually decreases in a direction away from the non-light-transmitting region C1, so that the light transmission rate of the partially light-transmitting region gradually increases in the direction away from the non-light-transmitting region C1.

[0091] The light shielding pattern can be made of a negative photosensitive material, after the negative photosensitive material for making the light shielding pattern is formed, the negative photosensitive material is exposed by using the mask plate as shown in Figure 5 , and after development, the light shielding pattern as shown inFigure 6 The light shielding pattern shown. When exposed, since the amount of light received by the negative photosensitive material is gradual, a light shielding pattern with a gradual thickness can be made, thereby obtaining a light shielding pattern with a gradual transmittance in the edge portion.

[0092] Of course, the shape of the mask plate used in the present embodiment is not limited to that shown in Figure 3 and Figure 5 Other shapes can also be used.

[0093] It should be noted that each of the embodiments in the present specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment mainly describes the differences from other embodiments. In particular, for the embodiments, since they are basically similar to the product embodiments, they are described more simply, and the related parts can be referred to the part of the description of the product embodiments.

[0094] In the description of the above embodiments, the specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0095] The above describes only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

[0096] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above specific embodiments, and the above specific embodiments are only illustrative, but not restrictive, and any person skilled in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, which all belong to the protection of the present application.

Claims

1. A display panel, characterized by, The display panel comprises: a driving substrate; a light emitting unit and a pixel defining layer on the driving substrate, the light emitting unit is located in an area defined by the pixel defining layer, the pixel defining layer is made of light shielding material; a color filter layer and a black matrix on the light emitting unit light emitting side; wherein the light shielding pattern of the display panel comprises an edge portion and a center portion, along the direction away from the center portion, the thickness of the edge portion gradually decreases, the light shielding pattern is at least one of the black matrix and the pixel defining layer.

2. The display panel of claim 1, wherein, The cross section of the light shielding pattern in the first direction is trapezoidal, the first direction is perpendicular to the driving substrate and perpendicular to the extension direction of the light shielding pattern.

3. The display panel of claim 2, wherein, The angle between the side surface of the light shielding pattern and the plane where the driving substrate is located is less than 10°.

4. The display panel of claim 1, wherein, The display panel further comprises a protruding structure on the side of the light shielding pattern facing the driving substrate, the cross section of the protruding structure in the second direction is trapezoidal, the orthographic projection of the protruding structure on the driving substrate is located in the orthographic projection of the light shielding pattern on the driving substrate, the second direction is perpendicular to the driving substrate and perpendicular to the extension direction of the protruding structure.

5. The display panel of claim 4, wherein, The angle between the side surface of the protruding structure and the plane where the driving substrate is located is 50-70°.

6. The display panel of claim 1, wherein, The orthographic projection of the edge portion on the driving substrate partially overlaps with the orthographic projection of the pixel opening sidewall on the driving substrate.

7. The display panel of claim 1, wherein, The orthographic projection of the opening defined by the black matrix on the driving substrate covers the orthographic projection of the pixel opening on the driving substrate.

8. A display device, characterized by comprising: The display panel comprises any one of claims 1-7.

9. A manufacturing method of a display panel, comprising: The display panel is made by the manufacturing method comprising: forming a driving substrate; forming a light emitting unit and a pixel defining layer on the driving substrate, the light emitting unit is located in an area defined by the pixel defining layer, the pixel defining layer is made of light shielding material; forming a color filter layer and a black matrix on the light emitting unit light emitting side; wherein the light shielding pattern of the display panel comprises an edge portion and a center portion, along the direction away from the center portion, the thickness of the edge portion gradually decreases, the light shielding pattern is at least one of the black matrix and the pixel defining layer.

10. The manufacturing method of a display panel according to claim 9, wherein, Forming the light shielding pattern comprises: forming a layer of light shielding material, the light shielding material is made of negative photosensitive material; exposing the light shielding material using a mask plate, after developing, the light shielding pattern is formed, wherein the mask plate comprises an opaque area and a partially transparent area located around the opaque area, along the direction away from the opaque area, the transmittance of the partially transparent area gradually increases, wherein the opaque area corresponds to the opening area defined by the light shielding pattern; The opaque region is circular, and the partially light-transmissive region comprises a plurality of annular opaque patterns surrounding the opaque region, the annular opaque patterns are circular, and the arrangement density of the annular opaque patterns gradually decreases in a direction away from the opaque region; or the opaque region is circular, and the partially light-transmissive region comprises a zigzag opaque pattern arranged around the opaque region, and the size of the zigzag opaque pattern gradually decreases in a direction away from the opaque region.

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