CN113299721A

CN113299721A - Display panel, manufacturing method thereof and display device

Info

Publication number: CN113299721A
Application number: CN202110575907.0A
Authority: CN
Inventors: 冷传利
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2021-08-24
Anticipated expiration: 2041-05-26
Also published as: CN113299721B

Abstract

The invention discloses a display panel, a manufacturing method thereof and a display device, and relates to the technical field of display, wherein the display panel comprises: a substrate base plate; a plurality of sub-pixels; the pixel definition layer is positioned on one side of the substrate and comprises an opening area, the sub-pixels are positioned in the opening area and comprise a first sub-pixel and a second sub-pixel; the shading structure is positioned on one side of the pixel defining layer, which is far away from the substrate; the shading structure comprises a first shading structure and a second shading structure, the first shading structure at least partially surrounds the first sub-pixel, and the second shading structure at least partially surrounds the second sub-pixel; in the direction perpendicular to the plane of the substrate base plate, the maximum distance from the first light shielding structure to the first sub-pixel is smaller than the maximum distance from the second light shielding structure to the second sub-pixel; the light-emitting angle of the first sub-pixel is larger than that of the second sub-pixel. The invention improves the color cast of the visual angles of the first sub-pixel and the second sub-pixel and improves the display quality of the display panel.

Description

Display panel, manufacturing method thereof and display device

Technical Field

The invention relates to the technical field of display, in particular to a display panel, a manufacturing method of the display panel and a display device.

Background

With the continuous development of display technologies, the development process of display panels is gradually accelerated. Organic Light-Emitting Diode (OLED) display panels are increasingly used as a current-type Light-Emitting device in high-performance display, and OLED display panels have excellent characteristics of self-luminescence, no need of backlight, wide color gamut, high contrast, thin thickness, wide viewing angle, fast response speed, applicability to flexible panels, wide temperature range, simple structure and process, and are also increasingly used for mobile phone display.

The organic light emitting display panel in the prior art has the condition of attenuation along with the increase of an observation angle, and the brightness attenuation speeds of different color sub-pixels are different, so that the light intensities of the different color sub-pixels under a large visual angle are different, and the color cast problem is caused.

Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide a display panel capable of improving the color shift problem with a large viewing angle, a method for manufacturing the same, and a display device.

Disclosure of Invention

In view of the above, the present invention provides a display panel, a manufacturing method thereof and a display device, so as to improve the color shift problem of a large viewing angle and improve the display performance.

In one aspect, the present invention provides a display panel, comprising:

a substrate base plate;

a plurality of sub-pixels;

the pixel definition layer is positioned on one side of the substrate and comprises an opening area, the sub-pixels are positioned in the opening area and comprise a first sub-pixel and a second sub-pixel;

the shading structure is positioned on one side of the pixel defining layer, which is far away from the substrate;

the shading structure comprises a first shading structure and a second shading structure, the first shading structure at least partially surrounds the first sub-pixel, and the second shading structure at least partially surrounds the second sub-pixel;

in the direction perpendicular to the plane of the substrate base plate, the maximum distance from the first light shielding structure to the first sub-pixel is smaller than the maximum distance from the second light shielding structure to the second sub-pixel;

the light-emitting angle of the first sub-pixel is larger than that of the second sub-pixel.

On the other hand, the invention also provides a manufacturing method of the display panel, which comprises the following steps:

providing a substrate base plate;

forming a pixel defining layer on one side of the substrate, wherein the pixel defining layer comprises an opening area, the sub-pixel is positioned in the opening area, and the sub-pixel comprises a first sub-pixel and a second sub-pixel;

forming a shading structure on one side of the pixel definition layer, which is far away from the substrate, wherein the shading structure comprises a first shading structure and a second shading structure, the first shading structure at least partially surrounds the first sub-pixel, and the second shading structure at least partially surrounds the second sub-pixel; in the direction perpendicular to the plane of the substrate base plate, the maximum distance from the first light shielding structure to the first sub-pixel is smaller than the maximum distance from the second light shielding structure to the second sub-pixel; the light-emitting angle of the first sub-pixel is larger than that of the second sub-pixel.

Based on the same invention idea, the invention also provides a display device comprising the display panel.

Compared with the prior art, the display panel, the manufacturing method thereof and the display device provided by the invention at least realize the following beneficial effects:

the display panel provided by the invention is provided with a shading structure at one side of a pixel definition layer, which is far away from a substrate base plate, wherein the shading structure is used for preventing light leakage of the display panel and reducing the reflection action of the display panel and comprises a first shading structure corresponding to a first sub-pixel and a second shading structure corresponding to a second sub-pixel, the first shading structure at least partially surrounds the first sub-pixel, the second shading structure at least partially surrounds the second sub-pixel, and in the direction vertical to the plane of the substrate base plate, the maximum distance from the first shading structure to the first sub-pixel is less than the maximum distance from the second shading structure to the second sub-pixel; the light-emitting angle of the first sub-pixel is larger than that of the second sub-pixel, the light-emitting angle passing through the first sub-pixel is larger than that of the second sub-pixel, so that part of the light emitted by the first sub-pixel is blocked by the first light-shielding structure and part of the light emitted by the second sub-pixel is blocked by the second light-shielding structure and part of the light emitted by the second sub-pixel is emitted out of the display panel, meanwhile, because the maximum distance from the first light-shielding structure to the first sub-pixel is smaller than that from the second light-shielding structure to the second sub-pixel, the blocked light quantity of the light emitted by the first sub-pixel with higher brightness attenuation speed under a large viewing angle is smaller than that of the light emitted by the second sub-pixel with lower brightness attenuation speed, which is equivalent to that the quantity of the light corresponding to the first sub-pixel under the large viewing angle is increased, thereby enhancing the light-emitting brightness of the first sub-pixel under the large viewing angle, the difference of the emergent luminance of the first sub-pixel and the emergent luminance of the second sub-pixel corresponding to the large viewing angle is reduced, the color cast of the viewing angle of the first sub-pixel and the viewing angle of the second sub-pixel are obviously improved, and the display quality of the display panel is improved.

Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic plan view of a display panel according to the present invention;

FIG. 2 is a schematic plane structure diagram of another display panel provided by the present invention;

FIG. 3 is a cross-sectional view taken along line A-A' of FIG. 2;

FIG. 4 is a test result from a simulation experiment performed on a prior art display panel;

FIG. 5 is a cross-sectional view taken along line B-B' of FIG. 2;

FIG. 6 is a further sectional view taken along line A-A' of FIG. 2;

FIG. 7 is a further sectional view taken along line A-A' of FIG. 2;

FIG. 8 is a further sectional view taken along line B-B' of FIG. 2;

FIG. 9 is a further sectional view taken along line A-A' of FIG. 2;

FIG. 10 is a further sectional view taken along line A-A' of FIG. 2;

FIG. 11 is a further sectional view taken along line B-B' of FIG. 2;

FIG. 12 is a further sectional view taken along line A-A' of FIG. 2;

FIG. 13 is a flowchart of a method for fabricating a display panel according to the present invention;

fig. 14 is a schematic plan view of a display device according to an embodiment of the present invention.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Referring to fig. 1, 2 and 3, fig. 1 is a schematic plan view of a display panel according to the present invention; FIG. 2 is a schematic plane structure diagram of another display panel provided by the present invention; fig. 3 is a cross-sectional view taken along line a-a' of fig. 2.

The present embodiment provides a display panel, the display panel 100 includes a display area AA and a non-display area NA surrounding the display area AA, the display panel 100 includes:

a base substrate 10;

a plurality of sub-pixels P;

a pixel defining layer 50 on one side of the substrate base plate 10, the pixel defining layer 50 including an opening area 501, a sub-pixel P located in the opening area 501, the sub-pixel P including a first sub-pixel P1 and a second sub-pixel P2; the light shielding structure 70, the light shielding structure 70 is located on one side of the pixel defining layer 50 away from the substrate base plate 10; the light shielding structure 70 includes a first light shielding structure 71 and a second light shielding structure 72, the first light shielding structure 71 at least partially surrounds the first sub-pixel P1, and the second light shielding structure 72 at least partially surrounds the second sub-pixel P2; in a direction perpendicular to the plane of the substrate base plate 10, the maximum distance h1 from the first light shielding structure 71 to the first sub-pixel P1 is smaller than the maximum distance h2 from the second light shielding structure 72 to the second sub-pixel P2; the light emitting angle of the first sub-pixel P1 is greater than that of the second sub-pixel P2.

Specifically, the display panel provided by this embodiment may be an organic light emitting display panel, which has the advantages of self-luminescence, high brightness, wide viewing angle, and fast response, and a backlight is not required, and a thin organic material coating and a glass substrate may be used. The substrate 10 of this embodiment may be used as a carrier for carrying other structures of a display panel, and the substrate 10 may be a glass substrate or a flexible substrate, which is not limited in this embodiment. The display panel further includes an array layer 20 located on one side of the substrate 10, where the array layer 20 may include a gate metal layer, a source/drain metal layer, an active layer, and an insulating layer (not shown) between the conductive film layers for making a light-emitting control unit of the sub-pixel to control whether the sub-pixel emits light or not. And the planarization layer 30 is positioned on the side of the array layer 20 far away from the substrate base plate 10, and the planarization layer 30 planarizes the surface of the array layer 20. The pixel defining layer 50 on the side of the planarization layer 30 away from the substrate 10 includes a plurality of opening regions 501, and of course, the pixel defining layer 50 further includes opening regions 501, and along the direction that the pixel defining layer 50 points perpendicularly to the substrate 10, an opening may penetrate at least through the pixel defining layer 50, and the sub-pixels P are located in the opening regions 501, and the color of the sub-pixel P in each opening is different, as shown in fig. 1, the sub-pixel includes a first sub-pixel P1 and a second sub-pixel P2, and the sub-pixel in fig. 1 further includes a third sub-pixel P3, and the forward projection of the sub-pixel to the substrate 10 and the forward projection of the opening to the substrate 10 overlap each other. Each sub-pixel includes a first electrode 401a, a light emitting portion 401b, and a second electrode 401c on a side of the planarization layer 30 away from the base substrate 10; each opening of the pixel defining layer 50 is used for disposing a sub-pixel, optionally, the first electrode 401a may be an anode, the second electrode 401c may be a cathode, and when a current passes through the first electrode 401a and the second electrode 401c and forms an electric field between the first electrode 401a and the second electrode 401c, the light emitting portion 401b emits light. Also shown in fig. 3 is an encapsulation layer 60 located on a side of the sub-pixel P away from the substrate 10 for encapsulating and protecting the sub-pixel, and optionally, the encapsulation layer 60 may include a stack structure of an inorganic layer, an organic layer, and a plurality of film layers of the inorganic layer. The substrate base 10, planarization layer 30 and encapsulation layer 60 are not pattern filled in fig. 3. Fig. 3 also shows that a color resistor (not shown in the figure) is included on a side of the encapsulating layer 60 away from the substrate 10, it can be understood that the color resistor may be on the same layer as the light shielding structure, and certainly the color resistor may also be arranged on a different layer from the light shielding structure, which is not specifically limited herein.

It should be noted that fig. 3 of this embodiment only schematically illustrates the structure of the display panel, and in a specific implementation, the structure of the display panel is not limited thereto, and may also include other structures capable of implementing the function of the organic display panel, such as film layer structures of the insulating layers, the passivation layer, and the cover plate (not shown in the figure) at the side of the light shielding structure far away from the substrate 10, which can be specifically understood with reference to the structure of the display panel in the related art, and the present invention is not described in detail herein.

It should be understood that fig. 1 shows a case where the first light shielding structure 71 partially surrounds the first sub-pixel P1, and the second light shielding structure 72 partially surrounds the second sub-pixel P2, that is, the first light shielding structure 71 in fig. 1 is only disposed around one side of the rectangular first sub-pixel P1, and the second light shielding structure 72 is only disposed around one side of the rectangular second sub-pixel P2, although the sub-pixel P may have other shapes, such as a circle, and is not specifically limited herein, and it should be satisfied that the maximum distance h1 from the first light shielding structure 71 to the first sub-pixel P1 is smaller than the maximum distance h2 from the second light shielding structure 72 to the second sub-pixel P2 in a direction perpendicular to the plane of the substrate 10; the light-emitting angle of the first sub-pixel P1 is greater than that of the second sub-pixel P2; fig. 2 shows a case where the first light shielding structure 71 surrounds the first sub-pixel P1, the second light shielding structure 72 surrounds the second sub-pixel P2, and the first light shielding structure 71 does not overlap with the first sub-pixel P1 and the second light shielding structure 72 does not overlap with the second sub-pixel P2 in a direction perpendicular to the plane of the substrate base plate 10, although the position of the light shielding structure is not specifically limited here. It should be noted that, in general, the orthogonal projection of the sub-pixel P on the plane of the substrate base plate 10 is in a shape of a rectangle, etc., the first light shielding structure 71 at least partially surrounds the first sub-pixel P1, and the second light shielding structure 72 at least partially surrounds the second sub-pixel P2, which is not limited herein. Here, the first light shielding structure 71 partially surrounding the first sub-pixel P1 means a case where the first light shielding structure 71 overlaps the first sub-pixel P1 in a direction perpendicular to the substrate base 10, and the second light shielding structure 72 partially surrounding the second sub-pixel P2 means a case where the second light shielding structure 72 overlaps the second sub-pixel P2 in a direction perpendicular to the substrate base 10. In some alternative embodiments, the first light shielding structure 71 surrounds the first sub-pixel P1, and the second light shielding structure 72 surrounds the second sub-pixel P2, so that the difference between the luminance of the first sub-pixel P1 with fast luminance decay and the luminance of the second sub-pixel P2 with slow luminance decay at a large viewing angle can be reduced.

Fig. 3 only shows that the thickness of the light shielding structure in the direction perpendicular to the plane of the substrate 10 is changed to satisfy that the maximum distance from the first light shielding structure 71 to the first sub-pixel P1 is less than the maximum distance from the second light shielding structure 72 to the second sub-pixel P2, but other ways to ensure that the maximum distance from the first light shielding structure 71 to the first sub-pixel P1 is less than the maximum distance from the second light shielding structure 72 to the second sub-pixel P2 may be adopted, such as changing the thickness of a film layer between the sub-pixel and the light shielding structure, and the like, which is only schematically illustrated here.

The maximum distance from the first light shielding structure 71 to the first sub-pixel P1 in the present invention is the distance between the first sub-pixel P1 and the side of the first light shielding structure 71 away from the substrate 10, as shown in h1 in fig. 3, and will not be described in detail below.

In the prior art, the first sub-pixel of the display panel may be a red sub-pixel, the second sub-pixel may be a blue sub-pixel or a green sub-pixel, and in a direction perpendicular to a plane of the substrate, a maximum distance from the first light shielding structure to the red sub-pixel is equal to a maximum distance from the second light shielding structure to the blue sub-pixel (green sub-pixel), and a light emitting angle of the red sub-pixel is also equal to a light emitting angle of the blue sub-pixel (green sub-pixel), but after passing through the glass cover plate and other film layers, an attenuation speed of the red sub-pixel is greater than that of the blue sub-pixel (green sub-pixel), so that a luminance of the red sub-pixel is less than that of the blue sub-pixel (green sub-pixel) at a large viewing angle. Referring to fig. 4, fig. 4 is a detection result obtained by a simulation experiment performed on a display panel of the prior art, fig. 4 respectively measures color cast conditions of the display panel at viewing angles of 30 °, 45 ° and 60 °, and simulation experiments of the inventor prove that the display panel is bluish-green and has a color cast problem at the viewing angles of 45 ° and 60 °.

In the present embodiment, the decay rate of the first sub-pixel P1 is greater than that of the second sub-pixel P2, so that the color of the display panel may be color-shifted toward the color of the second sub-pixel P2. In the present invention, the light-emitting angle of the first sub-pixel P1 is greater than the light-emitting angle of the second sub-pixel P2, and referring to fig. 3, the included angle θ 1 between the light L1 emitted from the first sub-pixel P1 and the positive viewing angle is greater than the light L2 emitted from the second sub-pixel P2, and L3 in fig. 3 is the same as the light-emitting direction of the light L1, it can be seen from fig. 3 that since the maximum distance from the first light-shielding structure 71 to the first sub-pixel P1 is less than the maximum distance from the second light-shielding structure 72 to the second sub-pixel P2, L3 will be shielded by the second light-shielding structure 72 and will not be observed from the light-emitting side of the display panel, so that the light-emitting amount from the second sub-pixel P2 can be reduced, the light-emitting amount shielded by the first light-shielding structure 71 is less than the light-shielding structure 72, the light-emitting amount of the second sub-pixel P2 under a large viewing angle is reduced, which is equivalent to the number of the first sub-pixel P1 with a faster luminance attenuation under a large viewing angle is increased, therefore, the emergent brightness of the first sub-pixel P1 at a large viewing angle is enhanced, the difference between the emergent brightness of the first sub-pixel P1 with fast brightness attenuation and the emergent brightness of the second sub-pixel P2 with slow brightness attenuation at the large viewing angle is reduced, the color cast of the viewing angles of the first sub-pixel P1 and the second sub-pixel P2 is obviously improved, and the display quality of the display panel is improved.

In this embodiment, the viewing angle color shift can be improved without changing the orthographic projection area of the light shielding structure 70 on the plane of the substrate 10, and meanwhile, since the orthographic projection area of the light shielding structure 70 on the plane of the substrate 10 is not reduced, the requirement of the reflectivity of the display panel can be considered, and the reflectivity of the display panel is not affected.

In some alternative embodiments, with continuing reference to fig. 1 and with continuing reference to fig. 5, fig. 5 is a cross-sectional view taken along line B-B' of fig. 2, the sub-pixel P further includes a third sub-pixel P3, the light shielding structure 70 further includes a third light shielding structure 73, and the third light shielding structure 73 at least partially surrounds the third sub-pixel P3;

in the direction perpendicular to the plane of the substrate base plate 10, the maximum distance from the second light shielding structure 72 to the second sub-pixel P2 is smaller than the maximum distance from the third light shielding structure 73 to the third sub-pixel P3; the light emitting angle of the second sub-pixel P2 is greater than that of the third sub-pixel P3.

As shown in fig. 5, in the embodiment, it is only shown that the thickness of the second light shielding structure 72 is smaller than that of the third light shielding structure 73 in the direction perpendicular to the plane of the substrate base plate 10, and at this time, the maximum distance from the second light shielding structure 72 to the second sub-pixel P2 is smaller than that from the third light shielding structure 73 to the third sub-pixel P3 in the direction perpendicular to the plane of the substrate base plate 10.

In the prior art, the first sub-pixel of the display panel may be a red sub-pixel, the second sub-pixel may be a green sub-pixel, the third sub-pixel may be a blue sub-pixel, and in a direction perpendicular to a plane of the substrate, a maximum distance from the first light-shielding structure to the red sub-pixel, a maximum distance from the second light-shielding structure to the blue sub-pixel, and a maximum distance from the third light-shielding structure to the third sub-pixel are all equal, and a light-emitting angle of the red sub-pixel, a light-emitting angle of the blue sub-pixel, and a light-emitting angle of the blue sub-pixel are all equal, but attenuation speeds of the red sub-pixel, the green sub-pixel, and the blue sub-pixel in each color sub-pixel are gradually decreased, with reference to fig. 4, luminance of the red sub-pixel may be smaller than luminance of the green sub-pixel, and luminance of the green sub-pixel may be smaller than luminance of the blue sub-pixel under a large viewing angle, so that the display panel is all bluish green, there is a color shift problem at large viewing angles.

In the present embodiment, the decay rates of the first sub-pixel P1, the second sub-pixel P2, and the third sub-pixel P3 are gradually decreased, so that the color of the display panel is shifted toward the colors of the second sub-pixel P2 and the third sub-pixel P3. In the present invention, the light emitting angle of the first sub-pixel P1 is greater than the light emitting angle of the second sub-pixel P2, the light emitting angle of the second sub-pixel P2 is greater than the light emitting angle of the third sub-pixel P3, with reference to fig. 5, the angle θ 1 between the light L1 emitted from the first sub-pixel P1 and the normal viewing angle is greater than the angle θ 2 between the light L2 emitted from the second sub-pixel P2 and the normal viewing angle, the angle θ 2 between the light L2 emitted from the second sub-pixel P2 and the normal viewing angle is greater than the angle θ 3 between the light L3 emitted from the third sub-pixel P3 and the normal viewing angle, the light emitting directions of L3 and L6 and the light L1 in fig. 5 are the same, the light emitting directions of L5 and the light L2 are the same, and it can be known from fig. 5 that the maximum distance from the first light shielding structure 71 to the first sub-pixel P1 is less than the maximum distance from the second light shielding structure P3 to the second sub-pixel P2, and the maximum distance from the second light shielding structure P4673 is less than the third sub-pixel P3, therefore, L3 is shielded by the second light shielding structure 72, L5 and L6 are both shielded by the third light shielding structure 73, and are not observed from the light emitting side of the display panel, the amount of light shielded by the first light shielding structure 71 is less than the amount of light shielded by the second light shielding structure 72, the amount of light shielded by the second light shielding structure 72 is less than the amount of light shielded by the third light shielding structure 73, the light emitting amount corresponding to the first subpixel P73725, the light emitting amount corresponding to the second subpixel P2 and the light emitting amount corresponding to the third subpixel P3 are gradually reduced under a large viewing angle, the difference of the light emitting luminance corresponding to the first subpixel P1, the second subpixel P2 and the third subpixel P637 is reduced, and the light emitting amount corresponding to the first subpixel P1, the light emitting amount corresponding to the second subpixel P2 and the light emitting amount corresponding to the third subpixel P3 are more uniform when the large viewing angle is reduced, and the color shift of the first subpixel P383, the second subpixel P42 and the third subpixel P3 is further improved, the display quality of the display panel is improved.

In some alternative embodiments, referring to FIG. 6, FIG. 6 is a further cross-sectional view taken along line A-A' of FIG. 2. The display panel comprises a color resistor 80, wherein the color resistor 80 is positioned on one side of the pixel defining layer 50 far away from the substrate base plate 10;

the color resistor 80 is arranged corresponding to the sub-pixel P, the color resistor 80 comprises a first color resistor 81 and a second color resistor 82, the first color resistor 81 at least partially overlaps the first sub-pixel P1, and the second color resistor 82 at least partially overlaps the second sub-pixel P2 in the direction perpendicular to the plane of the substrate base plate 10;

the first light shielding structure 71 is located on a side of the first color resistor 81 close to the pixel defining layer 50, and the second light shielding structure 72 is located on a side of the second color resistor 82 far from the pixel defining layer 50.

As can be seen from fig. 6, the first light shielding structure 71 is located on a side of the first color resist 81 close to the pixel defining layer 50, and the second light shielding structure 72 is located on a side of the second color resist 82 away from the pixel defining layer 50, so that a maximum distance from the first light shielding structure 71 to the first sub-pixel P1 is smaller than a maximum distance from the second light shielding structure 72 to the second sub-pixel P2.

In the present embodiment, the decay rate of the first sub-pixel P1 is greater than that of the second sub-pixel P2, so that the color of the display panel may be color-shifted toward the color of the second sub-pixel P2. In the present invention, the light-emitting angle of the first sub-pixel P1 is still larger than that of the second sub-pixel P2, and with reference to fig. 6, the included angle θ 1 between the light L1 emitted from the first sub-pixel P1 and the front viewing angle is larger than that of the light L2 emitted from the second sub-pixel P2, and the L3 is the same as the light-emitting direction of the light L1, since the first light-shielding structure 71 is located on the side of the first color resistor 81 close to the pixel defining layer 50, and the second light-shielding structure 72 is located on the side of the second color resistor 82 far away from the pixel defining layer 50, that is, the maximum distance from the first light-shielding structure 71 to the first sub-pixel P1 is smaller than the maximum distance from the second light-shielding structure 72 to the second sub-pixel P2, so that the L3 is shielded by the second light-shielding structure 72 and is not observed from the light-emitting side of the display panel, so that the light emitted from the second sub-pixel P2 can be reduced, and the light amount shielded by the first light-shielding structure 71 is smaller than that shielded by the second light-shielding structure 72, the light emitting amount of the second sub-pixel P2 under a large viewing angle is reduced, which is equivalent to that the quantity of the light rays of the first sub-pixel P1 with fast brightness attenuation under the large viewing angle is increased, so that the light emitting brightness of the first sub-pixel P1 under the large viewing angle is enhanced, the difference between the light emitting brightness of the first sub-pixel P1 with fast brightness attenuation and the light emitting brightness of the second sub-pixel P2 with slow brightness attenuation under the large viewing angle is reduced, the color deviation of the viewing angles of the first sub-pixel P1 and the second sub-pixel P2 is improved, and the display quality of the display panel is improved.

In addition, in the embodiment, the thicknesses of the light-shielding structures 70 in the direction perpendicular to the plane of the substrate 10 are equal, there is no need to set light-shielding structures 70 with different thicknesses for different sub-pixels P, there is no need to change the design process parameters of the light-shielding structures 70, only by changing the manufacturing sequence of the color resistors 80 corresponding to the different sub-pixels P, the second color resistor 82 is manufactured first, then the second light-shielding structure 72 and the first light-shielding structure 71 are manufactured, and finally the first color resistor 81 is manufactured, so that the first light shielding structure 71 is located at a side of the first color resist 81 close to the pixel defining layer 50, the second light-shielding structure 72 is located on the side of the second color filter 82 away from the pixel defining layer 50, so that the maximum distance h1 from the first light-shielding structure 71 to the first sub-pixel P1 is smaller than the maximum distance h2 from the second light-shielding structure 72 to the second sub-pixel P2, and the manufacturing process is simpler.

In some alternative embodiments, referring to FIG. 7, FIG. 7 is a further cross-sectional view taken along line A-A' of FIG. 2. The display panel further includes an encapsulation layer 60, and in a direction perpendicular to the plane of the substrate base plate 10, the encapsulation layer 60 is located between the pixel definition layer 50 and the light shielding structure 70;

the encapsulation layer 60 comprises a first part 61 and a second part 62, wherein an orthographic projection of the first part 61 on the plane of the substrate base plate 10 covers an orthographic projection of the first light shielding structure 71 on the plane of the substrate base plate 10, and an orthographic projection of the second part 62 on the plane of the substrate base plate 10 covers an orthographic projection of the second light shielding structure 72 on the plane of the substrate base plate 10;

the height of the first portion 61 is smaller than the height of the second portion 62 in a direction perpendicular to the plane of the base substrate 10.

In fig. 7, pattern filling is not performed on the encapsulation layer 60, the encapsulation layer 60 is located on a side of the sub-pixel away from the substrate base plate 10, the encapsulation layer 60 is disposed on the whole surface and is used for encapsulating and protecting the sub-pixel, and the encapsulation layer 60 may include a stack structure of an inorganic layer, an organic layer, and a plurality of film layers of the inorganic layer, which is not described herein again.

As can be seen in fig. 7, the encapsulation layer 60 includes a first portion 61 and a second portion 62, an orthographic projection of the first portion 61 on the plane of the substrate 10 covers an orthographic projection of the first light shielding structure 71 on the plane of the substrate 10, an orthographic projection of the second portion 62 on the plane of the substrate 10 covers an orthographic projection of the second light shielding structure 72 on the plane of the substrate 10, and a height of the first portion 61 is smaller than a height of the second portion 62 in a direction perpendicular to the plane of the substrate 10, so that a maximum distance from the first light shielding structure 71 to the first sub-pixel P1 is smaller than a maximum distance from the second light shielding structure 72 to the second sub-pixel P2.

In the present embodiment, the decay rate of the first sub-pixel P1 is greater than that of the second sub-pixel P2, so that the color of the display panel may be color-shifted toward the color of the second sub-pixel P2. In the present invention, the light-emitting angle of the first sub-pixel P1 is still larger than that of the second sub-pixel P2, and with reference to fig. 7, the included angle θ 1 between the light L1 emitted from the first sub-pixel P1 and the front viewing angle is larger than that of the light L2 emitted from the second sub-pixel P2, and L3 is the same as that of the light L1, because the height of the first portion 61 of the encapsulation layer 60 is smaller than that of the second portion 62 of the encapsulation layer 60 in the direction perpendicular to the plane of the substrate 10, that is, the maximum distance h1 from the first light-shielding structure 71 to the first sub-pixel P1 is smaller than the maximum distance h2 from the second light-shielding structure 72 to the second sub-pixel P2, so that the L3 is shielded by the second light-shielding structure 72 and is not observed from the light-emitting side of the display panel, which can reduce the light-emitting amount from the second sub-pixel P2, and the light-emitting amount shielded by the first light-shielding structure 71 is smaller than the light-shielding structure 72, thereby reducing the light-emitting amount of the light-emitting sub-pixel P2 at the large viewing angle. The quantity of light rays of the first sub-pixel P1 with fast brightness attenuation under a large viewing angle is increased, so that the light-emitting brightness of the first sub-pixel P1 under the large viewing angle is enhanced, the difference between the light-emitting brightness of the first sub-pixel P1 with fast brightness attenuation and the light-emitting brightness of the second sub-pixel P2 with slow brightness attenuation under the large viewing angle is reduced, the color cast of the first sub-pixel P1 and the second sub-pixel P2 under the large viewing angle is improved, and the display quality of the display panel is improved.

In some alternative embodiments, with continued reference to fig. 7, the encapsulation layer 60 may include a first inorganic layer 601 located on the side of the pixel defining layer 50 away from the substrate 10, an organic layer 602 located on the side of the first inorganic layer 601 away from the substrate 10, and a second inorganic layer 603 (not pattern-filled in the figure) located on the side of the organic layer 602 away from the substrate 10, in this embodiment, in the direction perpendicular to the plane of the substrate 10, the thicknesses of the first inorganic layer 601 and the second inorganic layer 603 are both equal, and the thickness of the portion of the organic layer 602 corresponding to the first sub-pixel P1 is smaller than the thickness of the portion corresponding to the second sub-pixel P2, so that the maximum distance from the first light shielding structure 71 to the first sub-pixel P1 is smaller than the maximum distance from the second light shielding structure 72 to the second sub-pixel P2, because for the encapsulation layer 60, the first inorganic layer 601 and the second inorganic layer 603 are usually fabricated by a photolithography process, in the manufacturing process, different thicknesses corresponding to different sub-pixels P are difficult to realize through photoetching, and stress concentration is easily caused in the photoetching process, so that an inorganic layer is damaged, water and oxygen enter a display area, and the display effect of a display panel is influenced; the organic layer 602 is manufactured by printing, and different thicknesses of the sub-pixels P can be achieved by changing the manufacturing process during the manufacturing process.

In some alternative embodiments, referring to fig. 8, fig. 8 is a further cross-sectional view along the direction B-B' in fig. 2, the sub-pixel P in fig. 8 further includes a third sub-pixel P3, the light shielding structure 70 further includes a third light shielding structure 73, and the third light shielding structure 73 at least partially surrounds the third sub-pixel P3;

the encapsulation layer 60 further includes a third portion 63, and an orthographic projection of the third portion 63 on the plane of the substrate 10 covers an orthographic projection of the third light shielding structure 73 on the plane of the substrate 10;

the height of the second portion 62 is smaller than the height of the third portion 63 in a direction perpendicular to the plane of the base substrate 10.

In the present embodiment, only the case where the third light shielding structure 73 surrounds the third sub-pixel P3 is shown, but of course, the third light shielding structure 73 may partially surround the third sub-pixel P3, which is not shown here.

In this embodiment, the encapsulation layer 60 includes a first portion 61, a second portion 62 and a third portion 63, an orthographic projection of the first portion 61 on the plane of the substrate 10 covers an orthographic projection of the first light shielding structure 71 on the plane of the substrate 10, an orthographic projection of the second portion 62 on the plane of the substrate 10 covers an orthographic projection of the second light shielding structure 72 on the plane of the substrate 10, an orthographic projection of the third portion 63 on the plane of the substrate 10 covers an orthographic projection of the third light shielding structure 73 on the plane of the substrate 10, in a direction perpendicular to the plane of the base substrate 10, the height of the first portion 61 is smaller than the height of the second portion 62, the height of the second portion 62 is smaller than the height of the third portion 63, so that the maximum distance from the first light shielding structure 71 to the first sub-pixel P1, the maximum distance from the second light shielding structure 72 to the second sub-pixel P2, and the maximum distance from the third light shielding structure 73 to the third sub-pixel P3 gradually increase.

In the present embodiment, the decay rates of the first sub-pixel P1, the second sub-pixel P2, and the third sub-pixel P3 are gradually decreased, so that the color of the display panel is shifted toward the colors of the second sub-pixel P2 and the third sub-pixel P3. In the present invention, the light-emitting angle of the first sub-pixel P1 is greater than the light-emitting angle of the second sub-pixel P2, the light-emitting angle of the second sub-pixel P2 is greater than the light-emitting angle of the third sub-pixel P3, with reference to fig. 8, the angle θ 1 between the light L1 emitted from the first sub-pixel P1 and the normal viewing angle is greater than the angle θ 2 between the light L2 emitted from the second sub-pixel P2 and the normal viewing angle, the angle θ 2 between the light L2 emitted from the second sub-pixel P2 and the normal viewing angle is greater than the angle θ 3 between the light L3 emitted from the third sub-pixel P3 and the normal viewing angle, the light-emitting directions of L3, L6 and the light L1 are the same, the light-emitting directions of L5 and the light L2 are the same, since the height of the first portion 61 is less than the height of the second portion 62 in the direction perpendicular to the plane of the substrate 10, it is ensured that the maximum distance from the first light-shielding structure P1 to the second sub-pixel P3672 is less than the maximum distance from the second light-shielding structure 2. Cannot be observed from the light exit side of the display panel; meanwhile, in the direction perpendicular to the plane of the substrate 10, the height of the second portion 62 is smaller than that of the third portion 63, so that the maximum distance from the second light shielding structure 72 to the second sub-pixel P2 is smaller than the maximum distance from the third light shielding structure 73 to the third sub-pixel P3, and both L5 and L6 are shielded by the third light shielding structure 73 and cannot be observed from the light emitting side of the display panel, therefore, the amount of light shielded by the first light shielding structure 71 is smaller than that shielded by the second light shielding structure 72, the amount of light shielded by the second light shielding structure 72 is smaller than that shielded by the third light shielding structure 73, the brightness of light emitted from the first sub-pixel P1, the light emitted from the second sub-pixel P2 and the light emitted from the third sub-pixel P3 gradually decrease at large viewing angles, the brightness of light emitted from the first sub-pixel P1, the second sub-pixel P2 and the third sub-pixel P3 at large viewing angles is reduced, and the brightness of the first sub-pixel P1 is improved, The viewing angle color shift of the second sub-pixel P2 and the third sub-pixel P3 improves the display quality of the display panel.

In some alternative embodiments, with continued reference to fig. 8, the encapsulation layer 60 may include a first inorganic layer 601 located on the side of the pixel defining layer 50 away from the substrate 10, an organic layer 602 located on the side of the first inorganic layer 601 away from the substrate 10, and a second inorganic layer 603 (not pattern-filled in the figure) located on the side of the organic layer 602 away from the substrate 10, in the present embodiment, the thicknesses of the first inorganic layer 601 and the second inorganic layer 603 are equal at all in the direction perpendicular to the plane of the substrate 10, and the thickness of the portion of the organic layer 602 corresponding to the first sub-pixel P1, the thickness of the portion corresponding to the second sub-pixel P2, and the thickness of the portion corresponding to the third sub-pixel P3 are gradually increased, so that the maximum distance from the first light shielding structure 71 to the first sub-pixel P1 is smaller than the maximum distance from the second light shielding structure 72 to the second sub-pixel P2, and the maximum distance from the second light shielding structure 72 to the second sub-pixel P2 is smaller than the maximum distance from the third light shielding structure P3, as described above, for the encapsulation layer 60, the first inorganic layer 601 and the second inorganic layer 603 are usually fabricated by a photolithography process, it is difficult to achieve different thicknesses of the sub-pixels P by photolithography, and stress concentration is easily caused during photolithography to destroy the inorganic layers, which causes water and oxygen to enter the display area and affects the display effect of the display panel; the organic layer 602 is manufactured by printing, and it is easy to realize that different sub-pixels P correspond to different thicknesses by changing the manufacturing process during the manufacturing process.

In some alternative embodiments, referring to fig. 9, fig. 9 is a further cross-sectional view along a-a' direction in fig. 2, the display panel in fig. 9 further includes an encapsulation layer 60, and the encapsulation layer 60 is located between the pixel definition layer 50 and the light shielding structure 70 in a direction perpendicular to the plane of the substrate base plate 10;

the light shielding structure 70 further includes a touch trace 90 on a side close to the package layer 60, and an orthogonal projection of the light shielding structure 70 on the plane of the substrate 10 covers an orthogonal projection of the touch trace 90 on the plane of the substrate 10.

Specifically, in fig. 9, a touch trace 90 is further included on a side of the light shielding structure close to the package layer 60, and an orthogonal projection of the light shielding structure 70 on the plane of the substrate 10 covers an orthogonal projection of the touch trace 90 on the plane of the substrate 10. In fig. 9, the encapsulation layer 60 is not pattern-filled, the encapsulation layer 60 is located on a side of the sub-pixel away from the substrate 10, and the encapsulation layer 60 is disposed on the whole surface for encapsulating and protecting the sub-pixel. When the display panel is manufactured, after the encapsulation layer 60 is formed, the touch trace 90 may be formed first, and then the color resistor 80 and the light shielding structure 70 are manufactured. Fig. 9 only shows that the touch trace 90 is located on a side of the package layer 60 away from the substrate 10 and on a side of the color resistor 80 close to the substrate 10, and it is needless to say that the touch trace 90 may also be located on a side of the light shielding structure 70 close to the color resistor 80, which is not limited in this respect.

In the present embodiment, the touch trace 90 is disposed on one side of the light shielding structure 70 close to the substrate 10, and an orthographic projection of the light shielding structure 70 on a plane of the substrate 10 covers an orthographic projection of the touch trace 90 on the plane of the substrate 10, so that touch can be achieved and an opening area of a sub-pixel can be increased.

In some alternative embodiments, referring to fig. 10, fig. 10 is a cross-sectional view taken along a direction a-a' in fig. 2, the pixel defining layer 50 further includes a non-opening region 502, and an orthogonal projection of the non-opening region 502 on the plane of the substrate base plate 10 covers an orthogonal projection of the light shielding structure 70 on the plane of the substrate base plate 10;

the minimum distance between the orthographic projection of the opening area edge of the first sub-pixel P1 on the substrate base plate 10 and the orthographic projection of the edge of the first light shielding structure 71 on the substrate base plate 10 is a, and the minimum distance between the orthographic projection of the opening area edge of the second sub-pixel P2 on the substrate base plate 10 and the orthographic projection of the edge of the second light shielding structure 72 on the substrate base plate 10 is b, wherein a is more than b.

As can be seen from fig. 10, in the present embodiment, the light shielding structure 70 does not shield the opening region 501 of the sub-pixel P, i.e. in the direction perpendicular to the plane of the substrate 10, the light shielding structure 70 does not overlap the opening region 501 of the sub-pixel P, and the non-opening region 502 covers the light shielding structure 70. The minimum distance a between the orthographic projection of the opening area edge of the first sub-pixel P1 on the substrate base plate 10 and the orthographic projection of the edge of the first light shielding structure 71 on the substrate base plate 10 is greater than the minimum distance b between the orthographic projection of the opening area edge of the second sub-pixel P2 on the substrate base plate 10 and the orthographic projection of the edge of the second light shielding structure 72 on the substrate base plate 10, so that a part of the light emitted from the second sub-pixel P2 is shielded by the second light shielding structure 72 and cannot be observed from the light emitting side of the display panel, the light emitting quantity from the second sub-pixel P2 can be reduced, the light quantity shielded by the first light shielding structure 71 is less than that shielded by the second light shielding structure 72, the quantity of the light rays corresponding to the first sub-pixel P1 with fast luminance attenuation under a large viewing angle is increased, the light emitting luminance of the first sub-pixel P1 under the large viewing angle is enhanced, and the difference between the luminance of the first sub-pixel P1 with fast luminance attenuation and the second sub-pixel P2 under the large viewing angle is reduced, the color cast of the viewing angles of the first sub-pixel P1 and the second sub-pixel P2 is improved, and the display quality of the display panel is improved.

In some alternative embodiments, referring to FIG. 11, FIG. 11 is a further cross-sectional view taken along line B-B' of FIG. 2. The sub-pixel of fig. 11 further comprises a third sub-pixel P3, the light shielding structure 70 further comprises a third light shielding structure 73, the third light shielding structure 73 at least partially surrounds the third sub-pixel P3;

the minimum distance between the orthographic projection of the edge of the opening area 501 of the third sub-pixel P3 on the plane of the substrate base plate 10 and the orthographic projection of the edge of the third light shielding structure 73 on the plane of the substrate base plate 10 is c, wherein b > c.

In the present embodiment, the decay rates of the first sub-pixel P1, the second sub-pixel P2, and the third sub-pixel P3 are gradually decreased, so that the color of the display panel is shifted toward the colors of the second sub-pixel P2 and the third sub-pixel P3. In the embodiment, the light shielding structure 70 does not shield the opening of the sub-pixel P, that is, in the direction perpendicular to the plane of the substrate 10, the light shielding structure 70 does not overlap with the opening area 501 of the sub-pixel P, and the non-opening area 502 covers the light shielding structure. The minimum distance a between the orthographic projection of the edge of the opening area of the first sub-pixel P1 on the substrate base plate 10 and the orthographic projection of the edge of the first light shielding structure 71 on the substrate base plate 10, the minimum distance b between the orthographic projection of the edge of the opening area 501 of the second sub-pixel P2 on the substrate base plate 10 and the orthographic projection of the edge of the second light shielding structure 72 on the substrate base plate 10, the minimum distance c between the orthographic projection of the edge of the opening area 501 of the third sub-pixel P3 on the plane of the substrate base plate 10 and the orthographic projection of the edge of the third light shielding structure 73 on the plane of the substrate base plate 10 are gradually reduced, the light shielded by the first light shielding structure 71, the second light shielding structure 72 and the third light shielding structure 73 is gradually increased, the light shielded by the first light shielding structure 71 is less than the light shielded by the second light shielding structure 72, the light shielding structure 72 is less than the light shielded by the third light shielding structure 73, and corresponds to the light output amount of the first sub-pixel P1 at a large viewing angle, The light emitting amount of the second sub-pixel P2 and the light emitting amount of the third sub-pixel P3 are gradually reduced, so that the difference of the light emitting brightness of the first sub-pixel P1, the second sub-pixel P2 and the third sub-pixel P3 at a large viewing angle is reduced, the color shift of the viewing angle of the first sub-pixel P1, the second sub-pixel P2 and the third sub-pixel P3 is improved, and the display quality of the display panel is improved.

In some alternative embodiments, referring to fig. 12, fig. 12 is a further sectional view along a-a' direction in fig. 2, the pixel defining layer 50 further includes a non-opening region 502, an orthogonal projection of the non-opening region 502 on the plane of the substrate base plate 10 covers an orthogonal projection of the first light shielding structure 71 on the plane of the substrate base plate 10, and an orthogonal projection of the second light shielding structure 72 on the plane of the substrate base plate 10 at least partially overlaps with the opening of the second sub-pixel P2 on the plane of the substrate base plate 10.

It can be understood that, in this embodiment, corresponding to the first sub-pixel P1, the orthographic projection of the non-opening area 502 on the plane of the substrate 10 covers the orthographic projection of the first light shielding structure 71 on the plane of the substrate 10, corresponding to the second sub-pixel P2, the orthographic projection of the second light shielding structure 72 on the plane of the substrate 10 at least partially overlaps with the opening of the second sub-pixel P2 on the plane of the substrate 10, so that the amount of light shielded by the second light shielding structure 72 is larger than the amount of light shielded by the first light shielding structure 71, which is equivalent to the increase of the amount of light of the first sub-pixel P1 with faster brightness attenuation at a large viewing angle, thereby increasing the brightness of the first sub-pixel P1 at a large viewing angle, reducing the difference between the brightness of the first sub-pixel P1 with faster brightness attenuation at a large viewing angle and the brightness of the second sub-pixel P2 with slower brightness attenuation at a large viewing angle, improving the color cast of the first sub-pixel P1 and the second sub-pixel P2, the display quality of the display panel is improved.

In some alternative embodiments, with continued reference to fig. 3 and 4, the first subpixel P1 is a red subpixel and the second subpixel P2 is one of a blue subpixel or a green subpixel.

In this embodiment, the first sub-pixel P1 of the display panel may be a red sub-pixel, the second sub-pixel P2 is a blue sub-pixel or a green sub-pixel, and the decay rate of the first sub-pixel P1 is greater than that of the second sub-pixel P2, so that the color of the display panel is shifted to the color of the second sub-pixel P2, and as a result, referring to fig. 4, the display panel is shifted to cyan when the viewing angle is 45 ° and 60 °. Therefore, in the invention, the light-emitting angle of the first sub-pixel P1 is greater than that of the second sub-pixel P2, the maximum distance from the first light-shielding structure 71 to the first sub-pixel P1 is less than that from the second light-shielding structure 72 to the second sub-pixel P2, the light quantity shielded by the first light-shielding structure 71 is less than that shielded by the second light-shielding structure 72, the light-emitting quantity of the second sub-pixel P2 under a large viewing angle is reduced, the difference between the light-emitting brightness of the red sub-pixel with fast brightness attenuation and the light-emitting brightness of the blue sub-pixel or the green sub-pixel with slow brightness attenuation under a large viewing angle is reduced, the color shift of the viewing angles of the first sub-pixel P1 and the second sub-pixel P2 is obviously improved, and the display quality of the display panel is improved.

Based on the same idea, the present invention further provides a method for manufacturing a display panel, and referring to fig. 13, fig. 13 is a flowchart of a method for manufacturing a display panel provided by the present invention, including the steps of:

s1, providing a substrate base plate;

s2, forming a pixel definition layer on one side of the substrate, wherein the pixel definition layer comprises an opening area, the sub-pixel is positioned in the opening area, and the sub-pixel comprises a first sub-pixel and a second sub-pixel;

s3, forming a light shielding structure on one side of the pixel definition layer far away from the substrate, wherein the light shielding structure comprises a first light shielding structure and a second light shielding structure, the first light shielding structure at least partially surrounds the first sub-pixel, and the second light shielding structure at least partially surrounds the second sub-pixel; in the direction perpendicular to the plane of the substrate base plate, the maximum distance from the first light shielding structure to the first sub-pixel is smaller than the maximum distance from the second light shielding structure to the second sub-pixel P2; the light-emitting angle of the first sub-pixel is larger than that of the second sub-pixel.

In some alternative embodiments, for example, to fabricate the display panel in fig. 3, the array layer 20 may be fabricated on the substrate 10, then the planarization layer 30 is formed on the side of the array layer 20 away from the substrate 10, the pixel defining layer 50 is formed on the side of the planarization layer 30 away from the substrate 10, the pixel defining layer 50 is formed to include the opening region 501, the sub-pixel P is located in the opening region 501, the sub-pixel includes the first sub-pixel P1 and the second sub-pixel P2, each sub-pixel includes the first electrode 401a, the light emitting portion 401b and the second electrode 401c located on the side of the planarization layer 30 away from the substrate 10, then the encapsulation layer 60 is formed, the encapsulation layer 60 encapsulates and protects the sub-pixel, then the light shielding structure is formed on the side of the encapsulation layer 60 away from the substrate 10, for the light shielding structure, the first light shielding structure 71 and the second light shielding structure 72 are required to be provided, as shown in fig. 3, a first light shielding structure 71 and a second light shielding structure 72, the first light shielding structure 71 at least partially surrounds the first sub-pixel P1, and the second light shielding structure 72 at least partially surrounds the second sub-pixel P2; in a direction perpendicular to the plane of the base substrate 10, the maximum distance from the first light shielding structure 71 to the first sub-pixel P1 is smaller than the maximum distance from the second light shielding structure 72 to the second sub-pixel P2; the light-emitting angle of the first sub-pixel P1 is greater than that of the second sub-pixel P2, so that the light quantity blocked by the first light-shielding structure 71 is less than that blocked by the second light-shielding structure 72, the light-emitting quantity of the second sub-pixel P2 under a large viewing angle is reduced, the difference between the light-emitting brightness of the first sub-pixel P1 with fast brightness attenuation and the light-emitting brightness of the second sub-pixel P2 with slow brightness attenuation is reduced under the large viewing angle, the color cast of the first sub-pixel P1 and the second sub-pixel P2 is improved, and the display quality of the display panel is improved.

Of course, when the display panel further includes the third sub-pixel P3, for example, the display panel in fig. 4 is manufactured, it is known that the manufactured light shielding structure further includes a third light shielding structure 73, and the third light shielding structure 73 at least partially surrounds the third sub-pixel P3; in the direction perpendicular to the plane of the substrate base plate 10, the maximum distance from the second light shielding structure 72 to the second sub-pixel P2 is smaller than the maximum distance from the third light shielding structure 73 to the third sub-pixel P3; the light-emitting angle of the second sub-pixel P2 is greater than the light-emitting angle of the third sub-pixel P3, so that the light quantity blocked by the first light-shielding structure 71 is less than the light quantity blocked by the second light-shielding structure 72, the light quantity blocked by the second light-shielding structure 72 is less than the light quantity blocked by the third light-shielding structure 73, the light quantity of the first sub-pixel P1, the light quantity of the second sub-pixel P2 and the light quantity of the third sub-pixel P3 are gradually reduced under a large viewing angle, the difference of the light-emitting brightness of the first sub-pixel P1, the second sub-pixel P2 and the third sub-pixel P3 is reduced under the large viewing angle, the color shift of the viewing angles of the first sub-pixel P1, the second sub-pixel P2 and the third sub-pixel P3 is improved, and the display quality of the display panel is improved.

In some alternative embodiments, for example, in the manufacturing of the display panel in fig. 8, the encapsulation layer 60 may be formed with different thicknesses corresponding to different sub-pixels when the encapsulation layer 60 is manufactured, where the encapsulation layer 60 includes a first portion 61, a second portion 62, and a third portion 63, an orthographic projection of the first portion 61 on the plane of the substrate 10 covers an orthographic projection of the first light shielding structure 71 on the plane of the substrate 10, an orthographic projection of the second portion 62 on the plane of the substrate 10 covers an orthographic projection of the second light shielding structure 72 on the plane of the substrate 10, an orthographic projection of the third portion 63 on the plane of the substrate 10 covers an orthographic projection of the third light shielding structure 73 on the plane of the substrate 10, and in a direction perpendicular to the plane of the substrate 10, a height of the first portion 61 is smaller than a height of the second portion 62, a height of the second portion 62 is smaller than a height of the third portion 63, therefore, the maximum distance from the first light shielding structure 71 to the first sub-pixel P1, the maximum distance from the second light shielding structure 72 to the second sub-pixel P2, and the maximum distance from the third light shielding structure 73 to the third sub-pixel P3 gradually increase, so that the light amount shielded by the first light shielding structure 71, the light amount shielded by the second light shielding structure 72, and the light amount shielded by the third light shielding structure 73 sequentially increase, the light output amount corresponding to the first sub-pixel P1, the light output amount corresponding to the second sub-pixel P2, and the light output amount corresponding to the third sub-pixel P3 at a large viewing angle gradually decrease, the difference of the light output luminance corresponding to the first sub-pixel P1, the second sub-pixel P2, and the third sub-pixel P3 at a large viewing angle is reduced, the color shift of the first sub-pixel P1, the second sub-pixel P2, and the third sub-pixel P3 is improved, and the display quality of the display panel is improved.

In some optional embodiments, with continuing reference to fig. 6, the method for manufacturing a display panel provided by the present invention further includes, for manufacturing the display panel in fig. 6, specifically:

forming a second color resistor on one side of the pixel defining layer far away from the substrate base plate, wherein the second color resistor is at least partially overlapped with the second sub-pixel in the direction vertical to the plane of the substrate base plate;

forming a first light shielding structure and a second light shielding structure, so that the second light shielding structure is positioned on one side of the second color resistor, which is far away from the substrate;

and forming a first color resistor on one side of the first shading structure far away from the substrate base plate, wherein the first color resistor is at least partially overlapped with the first sub-pixel in the direction vertical to the plane of the substrate base plate.

In this embodiment, the second color resistor 82 is fabricated first, then the first light shielding structure 71 and the second light shielding structure 72 are fabricated, finally the first color resistor 81 is fabricated, so that the second light shielding structure 72 is located at the side of the second color resistor 82 far away from the substrate base 10, the first color resistor 81 is located at the side of the first light shielding structure 71 far away from the substrate base 10, thereby ensuring that the maximum distance from the first light shielding structure 71 to the first sub-pixel P1 is less than the maximum distance from the second light shielding structure 72 to the second sub-pixel P2, therefore, the manufacturing process is simpler, the light quantity shielded by the first light shielding structure 71 is less than that shielded by the second light shielding structure 72, the light output quantity of the second sub-pixel P2 under a large viewing angle is reduced, the difference between the light output brightness of the first sub-pixel P1 with fast brightness attenuation and the light output brightness of the second sub-pixel P2 with slow brightness attenuation under the large viewing angle is reduced, the problem of color cast under the large viewing angle is improved, and the display quality of the display panel is improved.

In some alternative embodiments, please refer to fig. 14, fig. 14 is a schematic plan view illustrating a display device according to an embodiment of the present invention, and the display device 200 provided in this embodiment includes the display panel 100 provided in the above embodiment of the present invention. The embodiment of fig. 14 only uses a mobile phone as an example to describe the display device 200, and it should be understood that the display device 200 provided in the embodiment of the present invention may be other display devices 200 having a display function, such as a computer, a television, and a vehicle-mounted display device, and the present invention is not limited thereto. The display device 200 provided in the embodiment of the present invention has the beneficial effects of the display panel 100 provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display panel 100 in the foregoing embodiments, and the detailed description of the embodiment is not repeated herein.

As can be seen from the above embodiments, the display panel, the manufacturing method thereof, and the display device provided by the present invention at least achieve the following beneficial effects:

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A display panel, comprising:

a substrate base plate;

a plurality of sub-pixels;

the pixel definition layer is positioned on one side of the substrate base plate and comprises an opening area, the sub-pixels are positioned in the opening area, and the sub-pixels comprise first sub-pixels and second sub-pixels;

the shading structure is positioned on one side of the pixel defining layer, which is far away from the substrate base plate;

the light shielding structure comprises a first light shielding structure and a second light shielding structure, the first light shielding structure at least partially surrounds the first sub-pixel, and the second light shielding structure at least partially surrounds the second sub-pixel;

2. The display panel of claim 1, wherein the sub-pixel further comprises a third sub-pixel, and wherein the light blocking structure further comprises a third light blocking structure at least partially surrounding the third sub-pixel;

in the direction perpendicular to the plane of the substrate base plate, the maximum distance from the second light shielding structure to the second sub-pixel is smaller than the maximum distance from the third light shielding structure to the third sub-pixel; the light-emitting angle of the second sub-pixel is larger than that of the third sub-pixel.

3. The display panel according to claim 1, wherein the display panel comprises a color resistor on a side of the pixel defining layer away from the substrate base plate;

the color resistors are arranged corresponding to the sub-pixels and comprise first color resistors and second color resistors, the first color resistors are at least partially overlapped with the first sub-pixels in the direction perpendicular to the plane of the substrate base plate, and the second color resistors are at least partially overlapped with the second sub-pixels;

the first shading structure is positioned on one side of the first color resistor close to the pixel defining layer, and the second shading structure is positioned on one side of the second color resistor far away from the pixel defining layer.

4. The display panel according to claim 1, further comprising an encapsulation layer, the encapsulation layer being located between the pixel defining layer and the light shielding structure in a direction perpendicular to a plane of the substrate base plate;

the packaging layer comprises a first part and a second part, wherein the orthographic projection of the first part on the plane of the substrate base plate covers the orthographic projection of the first light shielding structure on the plane of the substrate base plate, and the orthographic projection of the second part on the plane of the substrate base plate covers the orthographic projection of the second light shielding structure on the plane of the substrate base plate;

in a direction perpendicular to the plane of the substrate base plate, the height of the first portion is smaller than that of the second portion.

5. The display panel according to claim 4,

the sub-pixel further comprises a third sub-pixel, and the light shielding structure further comprises a third light shielding structure, wherein the third light shielding structure at least partially surrounds the third sub-pixel;

the packaging layer further comprises a third part, and the orthographic projection of the third part on the plane of the substrate base plate covers the orthographic projection of the third shading structure on the plane of the substrate base plate;

in the direction perpendicular to the plane of the substrate base plate, the height of the second portion is smaller than that of the third portion.

6. The display panel according to claim 1, further comprising an encapsulation layer, the encapsulation layer being located between the pixel defining layer and the light shielding structure in a direction perpendicular to a plane of the substrate base plate;

the light shielding structure further comprises a touch control wire on one side close to the packaging layer, and the orthographic projection of the light shielding structure on the plane of the substrate base plate covers the orthographic projection of the touch control wire on the plane of the substrate base plate.

7. The display panel according to claim 1, wherein the pixel defining layer further comprises a non-opening region, and an orthographic projection of the non-opening region on the plane of the substrate base plate covers an orthographic projection of the light shielding structure on the plane of the substrate base plate;

the minimum distance between the orthographic projection of the edge of the opening area of the first sub-pixel on the substrate and the orthographic projection of the edge of the first light shielding structure on the substrate is a, the minimum distance between the orthographic projection of the edge of the opening area of the second sub-pixel on the substrate and the orthographic projection of the edge of the second light shielding structure on the substrate is b, and a is more than b.

8. The display panel of claim 7, wherein the sub-pixel further comprises a third sub-pixel, and wherein the light blocking structure further comprises a third light blocking structure at least partially surrounding the third sub-pixel;

the minimum distance between the orthographic projection of the edge of the opening area of the third sub-pixel on the plane of the substrate base plate and the orthographic projection of the edge of the third light shielding structure on the plane of the substrate base plate is c, wherein b is greater than c.

9. The display panel according to claim 1, wherein the pixel defining layer further comprises a non-opening region, an orthographic projection of the non-opening region on a plane of the substrate base plate covers an orthographic projection of the first light shielding structure on the plane of the substrate base plate, and an orthographic projection of the second light shielding structure on the plane of the substrate base plate at least partially overlaps with the opening of the second sub-pixel on the plane of the substrate base plate.

10. The display panel of claim 1, wherein the first sub-pixel is a red sub-pixel and the second sub-pixel is one of a blue sub-pixel or a green sub-pixel.

11. A manufacturing method of a display panel is characterized by comprising the following steps:

providing a substrate base plate;

forming a pixel defining layer on one side of the substrate base plate, wherein the pixel defining layer comprises an opening area, sub-pixels are positioned in the opening area, and the sub-pixels comprise first sub-pixels and second sub-pixels;

forming a light shielding structure on one side of the pixel defining layer far away from the substrate, wherein the light shielding structure comprises a first light shielding structure and a second light shielding structure, the first light shielding structure at least partially surrounds the first sub-pixel, and the second light shielding structure at least partially surrounds the second sub-pixel; in the direction perpendicular to the plane of the substrate base plate, the maximum distance from the first light shielding structure to the first sub-pixel is smaller than the maximum distance from the second light shielding structure to the second sub-pixel; the light-emitting angle of the first sub-pixel is larger than that of the second sub-pixel.

12. The method for manufacturing a display panel according to claim 11, further comprising:

forming the first light shielding structure and the second light shielding structure, so that the second light shielding structure is positioned on one side of the second color resistor, which is far away from the substrate base plate;

13. A display device comprising the display panel according to any one of claims 1 to 10.