Display panel and manufacturing method therefor, and display apparatus

Abstract

The present disclosure discloses a display panel and a manufacturing method therefor, and a display apparatus. An insulating layer (21) is provided with a protrusion (210), and the orthographic projection of the protrusion (210) on a base substrate (10) is located in a third light-emitting region (13). The plane in which the surface of a first color filter layer (31) closest to the base substrate (10) is located is located between the base substrate (10) and the surface of a third color filter layer (33) closest to the base substrate (10). In a light shielding region (14), the orthographic projection of the first color filter layer (31) on the base substrate (10) overlaps with the orthographic projection of the third color filter layer (33) on the base substrate (10).

Description

Display panel and its manufacturing method, display device Cross-references to related applications

[0001] This disclosure claims priority to Chinese patent application No. 2024115544187, filed on November 1, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of display technology, and in particular to a display panel, a method for manufacturing the same, and a display device. Background Technology

[0003] OLED (Organic Light-Emitting Diode) is a self-emissive display without a backlight or liquid crystal, boasting excellent color saturation, contrast, and response speed. Due to its thinner, more transparent, and flexible materials, OLED allows for diverse design possibilities. COE (Color Filter On Encapsulation) technology is a newer process that deposits a color filter after traditional OLED encapsulation to achieve a polarizer-free structure. However, a problem has arisen where an excessively thick color filter negatively impacts light extraction efficiency. Summary of the Invention

[0004] This disclosure provides a display panel and its manufacturing method, as well as a display device, which aims to at least partially solve the problem of excessively thick color filters affecting light extraction efficiency.

[0005] In a first aspect of this disclosure, a display panel is provided, the display panel comprising: a substrate having a first light-emitting area, a second light-emitting area, a third light-emitting area, and a light-shielding area; a plurality of light-emitting structures, including a first light-emitting structure located in the first light-emitting area, a second light-emitting structure located in the second light-emitting area, and a third light-emitting structure located in the third light-emitting area, the light-shielding area being located between adjacent light-emitting structures; an encapsulation layer covering the light-emitting structures and the light-shielding area; an insulating layer located on the side of the encapsulation layer away from the substrate; the insulating layer having a boss on the side away from the substrate; the orthographic projection of the boss on the substrate being located in the third light-emitting area; a first color filter layer located on the side of the insulating layer away from the substrate; the orthographic projection of the first color filter layer on the substrate being located in the third light-emitting area. A light-emitting area and a light-shielding area; a second color filter layer located on the side of the insulating layer away from the substrate and on the side of the first color filter layer away from the substrate; the orthographic projection of the second color filter layer on the substrate located in the second light-emitting area and the light-shielding area; and a third color filter layer located on the boss and on the side of the second color filter layer away from the substrate; the orthographic projection of the third color filter layer on the substrate located in the third light-emitting area and at least part of the light-shielding area; the plane containing the surface of the first color filter layer closest to the substrate located between the surface of the third color filter layer closest to the substrate and the substrate, and in the light-shielding area, the orthographic projection of the first color filter layer on the substrate overlaps with the orthographic projection of the third color filter layer on the substrate.

[0006] In some embodiments, the plane containing the surface of the second color filter layer closest to the substrate may be located between the surface of the third color filter layer closest to the substrate and the substrate, and in the light-shielding area, the orthographic projection of the second color filter layer on the substrate overlaps with the orthographic projection of the third color filter layer on the substrate.

[0007] In some embodiments, the height of the boss in a direction perpendicular to the substrate may be greater than the thickness of the first color filter layer.

[0008] In some embodiments, the insulating layer may be a first protective layer having a first high region and a first low region; in a direction perpendicular to the substrate, the thickness of the first protective layer in the first high region is greater than its thickness in the first low region; the first low region covers the first light-emitting region, the second light-emitting region, and the light-shielding region, and the first high region is located in the third light-emitting region; the first color filter layer is disposed on the first protective layer in the first low region, the second color filter layer is disposed on the first protective layer in the first low region and the first color filter layer located in the light-shielding region, and the third color filter layer is disposed on the first protective layer in the first high region and the second color filter layer located in the light-shielding region.

[0009] In some embodiments, the display panel may further include: a touch insulating layer located between the first protective layer and the encapsulation layer; the touch insulating layer having a through hole; a first touch metal layer located between the touch insulating layer and the first protective layer; the first touch metal layer including a plurality of first touch sub-electrodes arranged sequentially and spaced apart from each other along a first direction, and a plurality of second touch sub-electrodes and a plurality of connecting electrodes arranged sequentially along a second direction; the plurality of second touch sub-electrodes and the plurality of connecting electrodes are alternately distributed and sequentially connected to form a second touch electrode extending along the second direction; the first direction intersects the second direction, and the first touch sub-electrodes and the second touch electrodes are spaced apart from each other; and a second touch metal layer located between the touch insulating layer and the encapsulation layer; the second touch metal layer including a plurality of bridging electrodes spaced apart from each other; each of the bridging electrodes is connected to two adjacent first touch sub-electrodes through the through hole to form a first touch electrode extending along the first direction.

[0010] In some embodiments, the insulating layer may include: a touch insulating layer located on the side of the encapsulation layer away from the substrate; the orthographic projection of the touch insulating layer on the substrate covering the first light-emitting area, the second light-emitting area, the third light-emitting area, and the light-shielding area; and a first protective layer located on the side of the touch insulating layer away from the substrate; the orthographic projection of the first protective layer on the substrate being located in the third light-emitting area; a first color filter layer disposed on the touch insulating layer; a second color filter layer disposed on the touch insulating layer and the first color filter layer located in the light-shielding area; and a third color filter layer disposed on the first protective layer and the second color filter layer located in the light-shielding area.

[0011] In some embodiments, the insulating layer may be a touch insulating layer formed using an organic encapsulation material and having a second high region and a second low region; in a direction perpendicular to the substrate, the thickness of the touch insulating layer in the second high region is greater than its thickness in the second low region; the second low region covers the first light-emitting region, the second light-emitting region, and the light-shielding region, and the second high region is located in the third light-emitting region; the first color filter layer is disposed on the touch insulating layer in the second low region, the second color filter layer is disposed on the touch insulating layer in the second low region and the first color filter layer located in the light-shielding region, and the third color filter layer is disposed on the touch insulating layer in the second high region and the second color filter layer located in the light-shielding region.

[0012] In some embodiments, the touch insulating layer has a through hole; the display panel may further include: a first touch metal layer located between the touch insulating layer and the first color filter layer; the first touch metal layer includes a plurality of first touch sub-electrodes arranged sequentially and spaced apart from each other along a first direction, and a plurality of second touch sub-electrodes and a plurality of connecting electrodes arranged sequentially along a second direction; the plurality of second touch sub-electrodes and the plurality of connecting electrodes are alternately distributed and sequentially connected to form a second touch electrode extending along the second direction; the first direction intersects the second direction, and the first touch sub-electrodes and the second touch sub-electrodes are spaced apart from each other; and a second touch metal layer located between the touch insulating layer and the encapsulation layer; the second touch metal layer includes a plurality of bridging electrodes spaced apart from each other; each of the bridging electrodes is connected to two adjacent first touch sub-electrodes through the through hole (230) to form a first touch electrode extending along the first direction.

[0013] In some embodiments, the refractive index of the first color filter layer may be less than the refractive index of the second color filter layer, and the refractive index of the second color filter layer may be less than the refractive index of the third color filter layer.

[0014] In a second aspect of this disclosure, a display device is provided, which may include a display panel as provided in the first aspect.

[0015] In a third aspect of this disclosure, a method for manufacturing a display panel is provided. The method may include: providing a substrate having a first light-emitting region, a second light-emitting region, a third light-emitting region, and a light-shielding region; forming a plurality of light-emitting structures on the substrate, the plurality of light-emitting structures including a first light-emitting structure located in the first light-emitting region, a second light-emitting structure located in the second light-emitting region, and a third light-emitting structure located in the third light-emitting region, the light-shielding region being located between adjacent light-emitting structures; depositing an encapsulation layer on the light-emitting structures and the light-shielding region; forming an insulating layer on the encapsulation layer, the insulating layer having a boss on the side away from the substrate, the orthogonal projection of the boss on the substrate being located in the third light-emitting region. A first color filter layer, a second color filter layer, and a third color filter layer are sequentially formed on the insulating layer; the orthographic projection of the first color filter layer on the substrate is located between the first light-emitting area and the light-shielding area; the orthographic projection of the second color filter layer on the substrate is located between the second light-emitting area and the light-shielding area; the orthographic projection of the third color filter layer on the substrate is located between the third light-emitting area and the light-shielding area; the plane containing the surface of the first color filter layer closest to the substrate is located between the surface of the third color filter layer closest to the substrate and the substrate, and in the light-shielding area, the orthographic projection of the first color filter layer on the substrate overlaps with the orthographic projection of the third color filter layer on the substrate.

[0016] In some embodiments, the plane containing the surface of the second color filter layer closest to the substrate may be located between the surface of the third color filter layer closest to the substrate and the substrate, and in the light-shielding area, the orthographic projection of the second color filter layer on the substrate overlaps with the orthographic projection of the third color filter layer on the substrate.

[0017] In some embodiments, forming an insulating layer on the encapsulation layer may include: forming a first protective layer on the encapsulation layer; and etching the first protective layer using a halftone mask to give the first protective layer a first high region and a first low region; in a direction perpendicular to the substrate, the thickness of the first protective layer in the first high region is greater than the thickness in the first low region; the first low region covers the first light-emitting region, the second light-emitting region, and the light-shielding region, and the first high region is located in the third light-emitting region.

[0018] In some embodiments, forming an insulating layer on the encapsulation layer may include: forming a touch insulating layer on the encapsulation layer and etching the touch insulating layer to form a through hole within the touch insulating layer; the orthographic projection of the touch insulating layer on the substrate covers the first light-emitting area, the second light-emitting area, the third light-emitting area, and the light-shielding area; and forming a first protective layer on the touch insulating layer and etching the first protective layer; the orthographic projection of the first protective layer on the substrate is located in the third light-emitting area.

[0019] In some embodiments, forming an insulating layer on the encapsulation layer may include: forming a touch insulating layer on the substrate using an organic encapsulation material, and etching the touch insulating layer to form a via within the touch insulating layer; and etching the touch insulating layer using a halftone mask to give the touch insulating layer a second high region and a second low region; in a direction perpendicular to the substrate, the thickness of the touch insulating layer in the second high region is greater than the thickness in the second low region; the second low region covers the first light-emitting region, the second light-emitting region, and the light-shielding region, and the second high region is located in the third light-emitting region.

[0020] According to one or more embodiments of the present disclosure, the display panel and its manufacturing method and display device have a first light-emitting area, a second light-emitting area, a third light-emitting area and a light-shielding area. The orthographic projection of the first color filter layer on the substrate is located in the first light-emitting area and the light-shielding area. The orthographic projection of the second color filter layer on the substrate is located in the second light-emitting area and the light-shielding area. The orthographic projection of the third color filter layer on the substrate is located in the third light-emitting area and the light-shielding area. In this way, the first color filter layer, the second color filter layer and the third color filter layer can be superimposed in the light-shielding area to form a black matrix. There is no need for a separate imaging and development process to form the black matrix, which can reduce one imaging and development process, reduce process complexity and manufacturing cost. Furthermore, an insulating layer is first set on the substrate, and a protrusion is provided on the side of the insulating layer away from the substrate. The orthogonal projection of the protrusion on the substrate is located in the third light-emitting area. Then, a first color filter layer, a second color filter layer, and a third color filter layer are sequentially set on the insulating layer. The plane of the surface of the first color filter layer that is closest to the substrate can be located between the surface of the third color filter layer that is closest to the substrate and the substrate. In this way, the plane of the third color filter layer is higher than the first color filter layer, and the third color filter layer is easier to set on the second color filter layer directly above the first color filter layer. This is beneficial to reduce the thickness of the third color filter layer and improve the light extraction efficiency of the product. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 shows a schematic diagram of the structure of a display panel in the related art.

[0023] Figure 2 shows a schematic diagram of the structure of a display panel according to some embodiments of the present disclosure.

[0024] Figure 3 shows a schematic diagram of the structure of a display panel according to some other embodiments of the present disclosure.

[0025] Figure 4 shows a schematic diagram of the structure of a display panel according to some embodiments of the present disclosure.

[0026] Figure 5 shows a top view of a first touch metal layer according to some embodiments of the present disclosure.

[0027] Figure 6 shows a schematic diagram of the structure of a display panel according to some embodiments of the present disclosure.

[0028] Figure 7 shows a schematic diagram of the structure of a display panel according to some embodiments of the present disclosure.

[0029] Figure 8 shows a flowchart illustrating a method for manufacturing a display panel according to some embodiments of the present disclosure.

[0030] Figure 9 shows a flowchart of step S102 according to some embodiments of the present disclosure.

[0031] Figure 10 shows a flowchart of step S102 according to other embodiments of the present disclosure.

[0032] Figure 11 shows a flowchart of step S102 according to some embodiments of the present disclosure.

[0033] Explanation of reference numerals in the attached figures: 10': Substrate; 21': Pixel definition layer; 210': Opening; 22': Red light-emitting structure; 23': Blue light-emitting structure; 24': Green light-emitting structure; 31': First passivation layer; 32': Planarization layer; 33': Second passivation layer; 34': Buffer layer; 41': First touch metal layer; 42': Touch insulating layer; 420': Through hole; 43': Second touch metal layer; 50': First protective layer; 61': Red film layer; 62': Blue film layer; 63': Green film layer; 70': Second protective layer; 10: Substrate; 11: First light-emitting area; 12: Second light-emitting area; 13: Third light-emitting area; 14: Light-shielding area; 21: Insulating layer; 210: Boss; 22: First protective layer Layer; 221: First high region; 222: First low region; 23: Touch insulating layer; 230: Through hole; 231: Second high region; 232: Second low region; 241: First touch metal layer; 242: Second touch metal layer; 25: Pixel definition layer; 251: First opening; 252: Second opening; 253: Third opening; 261: First light-emitting structure; 262: Second light-emitting structure; 263: Third light-emitting structure; 27: Encapsulation layer; 271: First passivation layer; 272: Planarization layer; 273: Second passivation layer; 274: Buffer layer; 28: Second protective layer; 31: First color filter layer; 32: Second color filter layer; 33: Third color filter layer; 91: First touch sub-electrode; 92: Second touch sub-electrode; 93: Connecting electrode. Detailed Implementation

[0034] To enable those skilled in the art to more clearly understand this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0035] Figure 1 is a schematic diagram of the structure of a display panel in the related technology. Referring to Figure 1, the display panel includes a substrate 10', a pixel definition layer 21', a red light emitting structure 22', a blue light emitting structure 23', a green light emitting structure 24', a first passivation layer 31', a planarization layer 32', a second passivation layer 33', a buffer layer 34', a first touch metal layer 41', a touch insulating layer 42', a second touch metal layer 43', a first protective layer 50', a red light film layer 61', a blue light film layer 62', a green light film layer 63', and a second protective layer 70'.

[0036] A driving circuit is provided on one side of the substrate 10'. A pixel definition layer 21' is located on the side of the substrate 10' where the driving circuit is provided. The pixel definition layer 21' has a plurality of mutually spaced openings 210'. A light-emitting structure is located within the opening 210' and is connected to the driving circuit. A light-emitting structure within one opening 210' can emit light of a certain color under the drive of the driving circuit. The light-emitting structures within the plurality of openings 210' include a light-emitting structure emitting red light (i.e., red light-emitting structure 22'), a light-emitting structure emitting blue light (i.e., blue light-emitting structure 23'), and a light-emitting structure emitting green light (i.e., green light-emitting structure 24').

[0037] A first passivation layer 31', a planarization layer 32', a second passivation layer 33', a buffer layer 34', a touch insulating layer 42', and a first protective layer 50' are sequentially stacked on the pixel definition layer 21', covering the pixel definition layer 21', the red light-emitting structure 22', the blue light-emitting structure 23', and the green light-emitting structure 24'. The touch insulating layer 42' has multiple interconnected holes 420' spaced apart from each other. A first touch metal layer 41' is located between the touch insulating layer 42' and the first protective layer 50'. A second touch metal layer 43' is located between the touch insulating layer 42' and the buffer layer 34', and extends into the interconnected holes 420' to connect with the first touch metal layer 41'.

[0038] Red light film layer 61', blue light film layer 62', and green light film layer 63' are sequentially stacked on the first protective layer 50'. The orthogonal projection of red light film layer 61' onto the substrate 10' covers the orthogonal projections of pixel definition layer 21' and red light emitting structure 22' onto the substrate 10'. The orthogonal projection of blue light film layer 62' onto the substrate 10' covers the orthogonal projections of pixel definition layer 21' and blue light emitting structure 23' onto the substrate 10'. The orthogonal projection of green light film layer 63' onto the substrate 10' covers the orthogonal projections of pixel definition layer 21' and green light emitting structure 24' onto the substrate 10'. The red light film layer 61', blue light film layer 62', and green light film layer 63' are stacked directly above the pixel definition layer 21', which can replace the black matrix. Therefore, it is not necessary to set up a separate black matrix, saving the black matrix formation process, reducing process complexity and manufacturing cost, and can also improve hue. However, in order to superimpose the red light film layer 61', blue light film layer 62', and green light film layer 63' directly above the pixel definition layer 21', the thickness of the blue light film layer 62' directly above the blue light emitting structure 23' needs to be greater than the thickness of the red light film layer 61', and the thickness of the green light film layer 63' directly above the green light emitting structure 24' needs to be greater than the sum of the thicknesses of the red light film layer 61' and the blue light film layer 62'. This results in the green light film layer 63' being too thick (generally 2μm to 3μm thicker), reducing the light transmittance and affecting the light emission efficiency of the product.

[0039] Figure 2 is a schematic diagram of the structure of a display panel in one or more embodiments of the present disclosure. Referring to Figure 2, a first aspect of the present disclosure provides a display panel, which includes a substrate 10, a plurality of light-emitting structures, an encapsulation layer 27, an insulating layer 21, a first color filter layer 31, a second color filter layer 32, and a third color filter layer 33.

[0040] The substrate 10 has a first light-emitting region 11, a second light-emitting region 12, a third light-emitting region 13, and a light-shielding region 14. Multiple light-emitting structures include a first light-emitting structure 261 located in the first light-emitting region 11, a second light-emitting structure 262 located in the second light-emitting region 12, and a third light-emitting structure 263 located in the third light-emitting region 13. The light-shielding region 14 is located between adjacent light-emitting structures. An encapsulation layer 27 covers the light-emitting structures and the light-shielding region 14. An insulating layer 21 is located on the side of the encapsulation layer 27 away from the substrate 10. The side of the insulating layer 21 away from the substrate 10 has a boss 210. The orthogonal projection of the boss 210 onto the substrate 10 is located in the third light-emitting region 13.

[0041] The first color filter layer 31 is located on the side of the insulating layer 21 away from the substrate 10. The orthographic projection of the first color filter layer 31 onto the substrate 10 is located in the first light-emitting region 11 and the light-shielding region 14. The second color filter layer 32 is located on the side of the insulating layer 21 away from the substrate 10, and on the side of the first color filter layer 31 away from the substrate 10. The orthographic projection of the second color filter layer 32 onto the substrate 10 is located in the second light-emitting region 12 and the light-shielding region 14. The third color filter layer 33 is located on the boss 210, and on the side of the second color filter layer 32 away from the substrate 10. The orthographic projection of the third color filter layer 33 onto the substrate 10 is located in the third light-emitting region 13 and at least partially in the light-shielding region 14. The plane containing the surface of the first color filter layer 31 closest to the substrate 10 is located between the surface of the third color filter layer 33 closest to the substrate 10 and the substrate 10. Furthermore, in the light-shielding region 14, the orthographic projection of the first color filter layer 31 onto the substrate 10 overlaps with the orthographic projection of the third color filter layer 33 onto the substrate 10.

[0042] For example, the light-emitting structures located in the first light-emitting area 11, the second light-emitting area 12, and the third light-emitting area 13 can emit light of different colors; that is, the first light-emitting area 11, the second light-emitting area 12, and the third light-emitting area 13 are light-emitting areas of different colors. For instance, if the light-emitting structure in the first light-emitting area 11 emits red light, then the first light-emitting area 11 is a red light-emitting area. If the light-emitting structure in the second light-emitting area 11 emits blue light, then the second light-emitting area 12 is a blue light-emitting area. If the light-emitting structure in the third light-emitting area 13 emits green light, then the third light-emitting area 13 is a green light-emitting area.

[0043] The first color filter layer 31, the second color filter layer 32, and the third color filter layer 33 are film layers of different colors. The color of each color filter layer corresponds to the color of its respective light-emitting area. For example, if the first light-emitting area 11 is red, then the first color filter layer 31 is a red film layer. If the second light-emitting area 12 is blue, then the second color filter layer 32 is a blue film layer. If the third light-emitting area 13 is green, then the third color filter layer 33 is a green film layer.

[0044] Referring to Figure 2, the orthographic projection of the second color filter layer 32 located on the insulating layer 21 onto the substrate 10 is located in the second light-emitting region 12. The orthographic projection of the second color filter layer 32 located on the first color filter layer 31 onto the substrate 10 is located in the light-shielding region 14. The orthographic projection of the third color filter layer 33 located on the insulating layer 21 onto the substrate 10 is located in the third light-emitting region 13. The orthographic projection of the third color filter layer 33 located on the second color filter layer 32 onto the substrate 10 is located in the light-shielding region 14. The first color filter layer 31, the second color filter layer 32, and the third color filter layer 33 can be superimposed in the light-shielding region 14 to form a black matrix.

[0045] Compared with setting a black matrix alone, the reflectivity of the superimposed color filter is better, as shown in Table 1 below.

[0046] Table 1 Comparison of reflectivity between black matrix and superimposed color filter

[0047]

[0048] The aforementioned display panel includes a substrate 10, multiple light-emitting structures, an encapsulation layer 27, an insulating layer 21, a first color filter layer 31, a second color filter layer 32, and a third color filter layer 33. The multiple light-emitting structures, encapsulation layer 27, insulating layer 21, first color filter layer 31, second color filter layer 32, and third color filter layer 33 are sequentially stacked on the substrate 10. The first color filter layer 31 is located in the first light-emitting area 11 and the light-shielding area 14, the second color filter layer 32 is located in the second light-emitting area 12 and the light-shielding area 14, and the third color filter layer 33 is located in the third light-emitting area 13 and the light-shielding area 14. By stacking the first color filter layer 31, the second color filter layer 32, and the third color filter layer 33 in the light-shielding area to form a black matrix, a separate imaging and development process is not required to form the black matrix, thereby reducing one imaging and development process, lowering process complexity, and reducing manufacturing costs. Furthermore, the insulating layer 21 has a protrusion 210 on the side away from the substrate 10. The orthogonal projection of the protrusion 210 on the substrate 10 is located on the insulating layer 21 of the third light-emitting area 13. The protrusion 210 raises the third color filter layer 33 of the third light-emitting area 13, so that the surface of the third color filter layer 33 of the third light-emitting area 13 is higher than the surface of the first color filter layer 31 of the first light-emitting area 11. After the thickness of the third color filter layer 33 of the third light-emitting area 13 does not need to be greater than the thickness of the first color filter layer 31 and the second color filter layer 32, the third color filter layer 33 of the light-shielding area 14 can also be superimposed on the first color filter layer 31 and the second color filter layer 32, which is beneficial to reduce the thickness of the third color filter layer 33 and improve the light output efficiency of the product.

[0049] In some embodiments, referring to Figure 2, the first light-emitting area 11, the second light-emitting area 12, and the third light-emitting area 13 are spaced apart from each other, and the light-shielding area 14 can surround the first light-emitting area 11, the second light-emitting area 12, and the third light-emitting area 13. That is, the edges of the first light-emitting area 11, the second light-emitting area 12, and the third light-emitting area 13 are all surrounded by the light-shielding area 14, and the light-shielding areas 14 surrounding two adjacent light-emitting areas are connected as one unit, so as to reserve space between two adjacent light-emitting areas to set a black matrix.

[0050] For example, referring to Figure 2, the third light-emitting area 13 can be located between the first light-emitting area 11 and the second light-emitting area 12. In this way, the finally superimposed third color filter layer 33 is located between the first color filter layer 31 and the second color filter layer 32, resulting in better overall structural stability.

[0051] In other embodiments, the second light-emitting area 12 may be located between the first light-emitting area 11 and the third light-emitting area 13, or the first light-emitting area 11 may be located between the second light-emitting area 12 and the third light-emitting area 13.

[0052] For example, in the direction perpendicular to the substrate 10, the sum of the thicknesses of the first color filter layer 31, the second color filter layer 32 and the third color filter layer 33 can be 1μm to 6μm, such as 1μm, 2μm, 3μm, 4μm, 5μm, 6μm, etc.

[0053] Figure 3 is a schematic diagram of the display panel structure in another embodiment of this disclosure. Referring to Figure 3, in some embodiments, the plane containing the surface of the second color filter layer 32 closest to the substrate 10 can be located between the surface of the third color filter layer 33 closest to the substrate 10 and the substrate 10. Furthermore, in the light-shielding area 14, the orthographic projection of the second color filter layer 32 onto the substrate 10 overlaps with the orthographic projection of the third color filter layer 33 onto the substrate 10. At this time, the surface of the third color filter layer 33 in the third light-emitting area 13 is not only higher than the surface of the first color filter layer 31 in the first light-emitting area 11, but also higher than the surface of the second color filter layer 32 in the second light-emitting area 12, which is beneficial for further thinning the thickness of the third color filter layer 33 and improving the light extraction efficiency of the product.

[0054] In some embodiments, referring to Figures 2 and 3, a first color filter layer 31 is disposed on the portion of the insulating layer 21 without the protrusion 210 (i.e., the insulating layer 21 of the first light-emitting region 11 and the light-shielding region 14). A second color filter layer 32 is disposed on the portion of the insulating layer 21 without the protrusion 210 (i.e., the insulating layer 21 of the second light-emitting region 12) and on the first color filter layer 31 located in the light-shielding region 14. A third color filter layer 33 is disposed on the protrusion 210 and the second color filter layer 32 located in the light-shielding region 14.

[0055] In the above embodiments, by providing a protrusion 210 on the side of the insulating layer 21 away from the substrate 10, and the protrusion 210 being located in the third light-emitting region 13, the surface of the third color filter layer 33 of the third light-emitting region 13 can be raised, so that the surface of the third color filter layer 33 of the third light-emitting region 13 is higher than the surface of the first color filter layer 31 and the surface of the second color filter layer 32 of the second light-emitting region 12, and even higher than the surface of the second color filter layer 32 of the light-shielding region 14. This is beneficial to reduce the thickness of the third color filter layer 33 and improve the light extraction efficiency of the product.

[0056] In other embodiments, the insulating layer 21 may also have a groove on the side away from the substrate 10. The orthogonal projection of the groove onto the substrate 10 is located in the first light-emitting region 11, the second light-emitting region 12, and the light-shielding region 14. The first color filter layer 31 and the second color filter layer 32 are disposed within the groove, and the third color filter layer 33 located in the third light-emitting region 13 is disposed outside the groove. The second color filter layer 32 located in the light-shielding region 14 is disposed on the first color filter layer 31, and the third color filter layer 33 located in the light-shielding region 14 is disposed on the second color filter layer 32.

[0057] For example, referring to FIG3, the height of the boss 210 in the direction perpendicular to the substrate 10 can be greater than the thickness of the first color filter layer 31. At this time, the plane containing the surface of the second color filter layer 32 closest to the substrate 10 is located between the surface of the third color filter layer 33 closest to the substrate 10 and the substrate 10, which is beneficial to further reduce the thickness of the third color filter layer 33 and improve the light extraction efficiency of the product.

[0058] In other embodiments, the height of the boss 210 in the direction perpendicular to the substrate 10 may be less than the thickness of the first color filter layer 31, or it may be equal to the thickness of the first color filter layer 31.

[0059] For example, referring to FIG3, in the direction perpendicular to the substrate 10, the height of the boss 210 can be equal to the sum of the thicknesses of the first color filter layer 31 and the second color filter layer 32. At this time, the surface of the boss 210 where the third color filter layer 33 is disposed is located on the same plane as the surface of the second color filter layer 32 where the third color filter layer 33 is disposed, and the third color filter layer 33 can be laid flat on the boss 210 and the second color filter layer 32.

[0060] In other embodiments, the height of the boss 210 in the direction perpendicular to the substrate 10 may be less than the sum of the thicknesses of the first color filter layer 31 and the second color filter layer 32, or it may be greater than the sum of the thicknesses of the first color filter layer 31 and the second color filter layer 32.

[0061] Figure 4 is a schematic diagram of the display panel structure in another embodiment of this disclosure. Referring to Figure 4, in one possible embodiment, the insulating layer 21 can be a first protective layer 22. The first protective layer 22 has a first high region 221 and a first low region 222. In the direction perpendicular to the substrate 10, the thickness of the first protective layer 22 in the first high region 221 is greater than the thickness in the first low region 222.

[0062] The first low region 222 covers the first light-emitting region 11, the second light-emitting region 12, and the light-shielding region 14, and the first high region 221 is located in the third light-emitting region 13. The first color filter layer 31 is disposed on the first protective layer 22 of the first low region 222, the second color filter layer 32 is disposed on the first protective layer 22 of the first low region 222 and the first color filter layer 31 located in the light-shielding region 14, and the third color filter layer 33 is disposed on the first protective layer 22 of the first high region 221 and the second color filter layer 32 located in the light-shielding region 14.

[0063] In the above embodiments, the first protective layer 22 has a first high region 221 and a first low region 222 with different thicknesses. Through the thickness difference between the first high region 221 and the first low region 222, a protrusion 210 can be formed on the side of the insulating layer 21 away from the substrate 10. The thicker first high region 221 is located in the third light-emitting region 13, and the thinner first low region 222 is located in the first light-emitting region 11, the second light-emitting region 12, and the light-shielding region 14. This makes the surface of the third color filter layer 33 of the third light-emitting region 13 higher than the surface of the first color filter layer 31 and the surface of the second color filter layer 32 of the second light-emitting region 12, and even higher than the surface of the second color filter layer 32 of the light-shielding region 14. This is beneficial for reducing the thickness of the third color filter layer 33 and improving the light extraction efficiency of the product.

[0064] For example, the first protective layer 22 may be formed of a transparent material.

[0065] For example, in the direction perpendicular to the substrate 10, the thickness of the first protective layer 22 can be 1μm to 6μm, such as 1μm, 1.5μm, 2μm, 2.5μm, 3μm, 3.5μm, 4μm, 4.5μm, 5μm, 5.5μm, 6μm, etc.

[0066] For example, referring to FIG4, the display panel may further include a touch insulating layer 23, a first touch metal layer 241, and a second touch metal layer 242. The touch insulating layer 23 is located between the first protective layer 22 and the encapsulation layer 27. FIG5 is a top view of the first touch metal layer of this disclosure. Referring to FIG5, the touch insulating layer 23 has a through hole 230. The first touch metal layer 241 is located between the touch insulating layer 23 and the first protective layer 10. The first touch metal layer 241 includes a plurality of first touch sub-electrodes 91 arranged sequentially and spaced apart from each other along a first direction, and a plurality of second touch sub-electrodes 92 and a plurality of connecting electrodes 93 arranged sequentially along a second direction. The plurality of second touch sub-electrodes 92 and the plurality of connecting electrodes 93 are alternately distributed and sequentially connected to form a second touch electrode extending along the second direction. The first direction intersects the second direction, and the first touch sub-electrodes 91 and the second touch electrodes 92 are spaced apart from each other. The second touch metal layer 242 is located between the touch insulating layer 23 and the encapsulation layer 27. The second touch metal layer 242 includes a plurality of bridging electrodes spaced apart from each other. The bridging electrodes are connected to two adjacent first touch sub-electrodes through connecting holes 230 to form first touch electrodes extending along a first direction.

[0067] For example, referring to FIG4, the orthographic projection of the connecting hole 230 on the substrate 10, the orthographic projection of the first touch metal layer 241 on the substrate 10, and the orthographic projection of the second touch metal layer 242 on the substrate 10 can all be located in the light-shielding area 14. In this way, the first touch metal layer 241 and the second touch metal layer 242 can be blocked by the black matrix, thereby avoiding affecting the display effect of the product.

[0068] For example, the touch insulating layer 23 may be formed of a transparent material.

[0069] Figure 6 is a schematic diagram of the display panel structure in another embodiment of this disclosure. Referring to Figure 6, in another possible embodiment, the insulating layer 21 may include a first protective layer 22 and a touch insulating layer 23. The touch insulating layer 23 is located on the side of the encapsulation layer 27 away from the substrate 10. The first protective layer 22 is located on the side of the touch insulating layer 23 away from the substrate 10.

[0070] The orthographic projection of the touch insulating layer 23 onto the substrate 10 covers the first light-emitting area 11, the second light-emitting area 12, the third light-emitting area 13, and the light-shielding area 14. The orthographic projection of the first protective layer 22 onto the substrate 10 is located in the third light-emitting area 13. The first color filter layer 31 is disposed on the touch insulating layer 23, the second color filter layer 32 is disposed on the touch insulating layer 23 and the first color filter layer 31 located in the light-shielding area 14, and the third color filter layer 33 is disposed on the first protective layer 22 and the second color filter layer 32 located in the light-shielding area 14.

[0071] In the above embodiment, a touch insulating layer 23 and a first protective layer 22 are sequentially provided on the side of the encapsulation layer 27 away from the substrate 10. The first protective layer 22 only covers part of the touch insulating layer 23. By the thickness difference formed by whether or not the first protective layer 22 is provided on the touch insulating layer 23, a protrusion 210 can be formed on the side of the insulating layer 21 away from the substrate 10. The first protective layer 22 is located in the third light-emitting area 13. The touch insulating layer 23 that does not cover the first protective layer 22 is located in the first light-emitting area 11, the second light-emitting area 12, and the light-shielding area 14. This makes the surface of the third color filter layer 33 in the third light-emitting area 13 higher than the surface of the first color filter layer 31 and the surface of the second color filter layer 32 in the second light-emitting area 12, and even higher than the surface of the second color filter layer 32 in the light-shielding area 14. This is beneficial for reducing the thickness of the third color filter layer 33 and improving the light extraction efficiency of the product.

[0072] For example, the first protective layer 22 and the touch insulating layer 23 may be formed of a transparent material.

[0073] For example, in the direction perpendicular to the substrate 10, the thickness of the first protective layer 22 can be 1μm to 6μm, such as 1μm, 1.5μm, 2μm, 2.5μm, 3μm, 3.5μm, 4μm, 4.5μm, 5μm, 5.5μm, 6μm, etc.

[0074] In some embodiments, referring to FIG6, the touch insulating layer 23 has a through hole 230.

[0075] The display panel may further include a first touch metal layer 241 and a second touch metal layer 242. The first touch metal layer 241 is located between the touch insulating layer 23 and the first color filter layer 31. The first touch metal layer 241 includes a plurality of first touch sub-electrodes arranged sequentially and spaced apart from each other along a first direction, and a plurality of second touch sub-electrodes and a plurality of connecting electrodes arranged sequentially along a second direction. The plurality of second touch sub-electrodes and the plurality of connecting electrodes are alternately distributed and connected sequentially to form a second touch electrode extending along the second direction. The first direction intersects the second direction, and the first touch sub-electrodes and the second touch sub-electrodes are spaced apart from each other. The second touch metal layer 242 is located between the touch insulating layer 23 and the encapsulation layer 27. The second touch metal layer 242 includes a plurality of bridging electrodes spaced apart from each other. Each bridging electrode is connected to two adjacent first touch sub-electrodes through a through-hole 230 to form a first touch electrode extending along the first direction.

[0076] For example, referring to FIG6, the orthographic projection of the connecting hole 230 on the substrate 10, the orthographic projection of the first touch metal layer 241 on the substrate 10, and the orthographic projection of the second touch metal layer 242 on the substrate 10 can all be located in the light-shielding area 14. In this way, the first touch metal layer 241 and the second touch metal layer 242 can be blocked by the black matrix, thereby avoiding affecting the display effect of the product.

[0077] Figure 7 is a schematic diagram of the display panel structure in another embodiment of this disclosure. Referring to Figure 7, in another possible embodiment, the insulating layer 21 can be a touch insulating layer 23. The touch insulating layer 23 is formed using an organic encapsulation material and has a second high region 231 and a second low region 232. In the direction perpendicular to the substrate 10, the thickness of the touch insulating layer 23 in the second high region 231 is greater than the thickness in the second low region 232.

[0078] The second low region 232 covers the first light-emitting region 11, the second light-emitting region 12, and the light-shielding region 14, and the second high region 231 is located in the third light-emitting region 13. The first color filter layer 31 is disposed on the touch insulating layer 23 of the second low region 232, the second color filter layer 32 is disposed on the touch insulating layer 23 of the second low region 232 and the first color filter layer 31 located in the light-shielding region 14, and the third color filter layer 33 is disposed on the touch insulating layer 23 of the second high region 231 and the second color filter layer 32 located in the light-shielding region 14.

[0079] In the above embodiments, the touch insulating layer 23 is formed using an organic encapsulation material, which can replace the protective layer to encapsulate the display panel. This eliminates the need for a separate first protective layer, saving on the formation process of the first protective layer and reducing process complexity and manufacturing costs. Furthermore, different areas of the touch insulating layer 23 can have different thicknesses. By having a second high region 231 and a second low region 232 with different thicknesses, the thickness difference between the second high region 231 and the second low region 232 can be used to form a protrusion 210 on the side of the insulating layer 21 away from the substrate 10. The thicker second high region 231 is located in the third light-emitting region 13, and the thinner second low region 232 is located in the first light-emitting region 11, the second light-emitting region 12, and the light-shielding region 14. This makes the surface of the third color filter layer 33 in the third light-emitting region 13 higher than the surface of the first color filter layer 31, the surface of the second color filter layer 32 in the second light-emitting region 12, and even the surface of the second color filter layer 32 in the light-shielding region 14. This facilitates thinning of the third color filter layer 33 and improves the light extraction efficiency of the product.

[0080] For example, organic encapsulation materials refer to encapsulation materials made of polymeric materials containing a carbon skeleton, including organic films, organic resins, organosilicon, and plexiglass. Organic encapsulation materials mainly include polymeric materials such as epoxy resin, EVA (Ethylene Vinyl Acetate Copolymer), PVB (Polyvinyl Butyral), polyolefins, silicones, and TPD (Thermoplastic Polyurethane), which can play a role in adhesion, protection, and insulation during the encapsulation process.

[0081] For example, the touch insulating layer 23 may be formed of a transparent material.

[0082] For example, in the direction perpendicular to the substrate 10, the thickness of the touch insulating layer 23 can be 0.5μm to 5μm, such as 0.5μm, 1μm, 1.5μm, 2μm, 2.5μm, 3μm, 3.5μm, 4μm, 4.5μm, 5μm, etc.

[0083] In some embodiments, referring to FIG7, the touch insulating layer 23 has a through hole 230.

[0084] The display panel may further include a first touch metal layer 241 and a second touch metal layer 242. The first touch metal layer 241 is located between the touch insulating layer 23 and the first color filter layer 31. The first touch metal layer 241 includes a plurality of first touch sub-electrodes arranged sequentially and spaced apart from each other along a first direction, and a plurality of second touch sub-electrodes and a plurality of connecting electrodes arranged sequentially along a second direction. The plurality of second touch sub-electrodes and the plurality of connecting electrodes are alternately distributed and connected sequentially to form a second touch electrode extending along the second direction. The first direction intersects the second direction, and the first touch sub-electrodes and the second touch sub-electrodes are spaced apart from each other. The second touch metal layer 242 is located between the touch insulating layer 23 and the encapsulation layer 27. The second touch metal layer 242 includes a plurality of bridging electrodes spaced apart from each other. Each bridging electrode is connected to two adjacent first touch sub-electrodes through a through-hole 230 to form a first touch electrode extending along the first direction.

[0085] For example, referring to FIG7, the orthographic projection of the connecting hole 230 on the substrate 10, the orthographic projection of the first touch metal layer 241 on the substrate 10, and the orthographic projection of the second touch metal layer 242 on the substrate 10 can all be located in the light-shielding area 14. In this way, the first touch metal layer 241 and the second touch metal layer 242 can be blocked by the black matrix, thereby avoiding affecting the display effect of the product.

[0086] For example, in the direction parallel to the substrate 10, the critical size of the connecting hole 230 can be 2μm to 8μm, such as 2μm, 2.5μm, 3μm, 3.5μm, 4μm, 4.5μm, 5μm, 5.5μm, 6μm, 6.5μm, 7μm, 7.5μm, 8μm, etc.

[0087] In some embodiments, referring to Figures 4, 6, and 7, the display panel may further include a pixel definition layer 25, which is located between the encapsulation layer 27 and the substrate 10. The pixel definition layer 25 has a first opening 251, a second opening 252, and a third opening 253. The first opening 251 is located in the first light-emitting area 11, and a first light-emitting structure 261 is disposed within the first opening 251. The second opening 252 is located in the second light-emitting area 12, and a second light-emitting structure 262 is disposed within the second opening 252. The third opening 253 is located in the third light-emitting area 13, and a third light-emitting structure 263 is disposed within the third opening 253.

[0088] For example, the first light-emitting structure 261, the second light-emitting structure 262, and the third light-emitting structure 263 can emit light of different colors. For instance, the first light-emitting structure 261 emits red light, the second light-emitting structure 262 emits blue light, and the third light-emitting structure 263 emits green light.

[0089] In some embodiments, a driving circuit may be provided on one side of the substrate 10, and multiple light-emitting structures, an encapsulation layer 27, and an insulating layer 21 are all located on the side of the substrate 10 where the driving circuit is provided. The first opening 251, the second opening 252, and the third opening 253 extend to the driving circuit, and the first light-emitting structure 261, the second light-emitting structure 262, and the third light-emitting structure 263 are respectively connected to the driving circuit.

[0090] In some embodiments, referring to Figures 4, 6, and 7, the encapsulation layer 27 may include a first passivation layer 271, a planarization layer 272, and a second passivation layer 273. The first passivation layer 271 is located between the pixel definition layer 25 and the touch insulating layer 23, and covers the pixel definition layer 25, the first light-emitting structure 261, the second light-emitting structure 262, and the third light-emitting structure 263. The planarization layer 272 is located between the first passivation layer 271 and the touch insulating layer 23. The second passivation layer 273 is located between the planarization layer 272 and the touch insulating layer 23. A second touch metal layer 242 is located between the second passivation layer 273 and the touch insulating layer 23.

[0091] In the above embodiments, the planarization layer 272 can fill the height difference formed inside and outside the first opening 251, the second opening 252, and the third opening 253. The planarization layer 272 can be insulated by providing a first passivation layer 271 and a second passivation layer 273 on both sides of the planarization layer 272.

[0092] In some embodiments, referring to Figures 4, 6, and 7, the display panel may further include a buffer layer 274. The buffer layer 274 is located between the second passivation layer 273 and the touch insulating layer 23. A second touch metal layer 242 is located between the buffer layer 274 and the touch insulating layer 23. Forming the buffer layer 274 first on the second passivation layer 273, and then forming the touch insulating layer 23 on the buffer layer 274, facilitates the formation of the touch insulating layer 23.

[0093] In some embodiments, referring to Figures 4, 6, and 7, the display panel may further include a second protective layer 28. The second protective layer 28 is located on the side of the third color filter layer 33 away from the substrate 10 and covers the first color filter layer 31, the second color filter layer 32, and the third color filter layer 33 to encapsulate the first color filter layer 31, the second color filter layer 32, and the third color filter layer 33.

[0094] For example, in the direction perpendicular to the substrate 10, the thickness of the second protective layer 28 can be 1μm to 5μm, such as 1μm, 1.5μm, 2μm, 2.5μm, 3μm, 3.5μm, 4μm, 4.5μm, 5μm, etc.

[0095] In some embodiments, the refractive index of the first color filter layer 31 is less than the refractive index of the second color filter layer 32, and the refractive index of the second color filter layer 32 is less than the refractive index of the third color filter layer 33.

[0096] In the above embodiments, the first color filter layer 31, the second color filter layer 32, and the third color filter layer 33 are sequentially stacked on the insulating layer 21, and the refractive index of the first color filter layer 31, the second color filter layer 32, and the third color filter layer 33 increases layer by layer, which is beneficial to light emission and improves the light emission efficiency of the product. Therefore, it can replace low refractive index film layers and / or high refractive index film layers, save the formation process of low refractive index film layers and / or high refractive index film layers, and reduce process complexity and manufacturing cost.

[0097] For example, the first color filter layer 31, the second color filter layer 32, and the third color filter layer 33 can be made of nanofilms. Compared with non-nanofilms, nanofilms improve brightness attenuation and color shift, as shown in Table 2 below.

[0098] Table 2 Comparison of Product Performance between Conventional Membranes and Nanomembranes

[0099]

[0100] In practical applications, the refractive indices of the first color filter layer 31, the second color filter layer 32, and the third color filter layer 33 can be varied by adding or removing nanoparticles from at least one of them.

[0101] A second aspect of this disclosure provides a display device, which includes the display panel provided in any of the above embodiments.

[0102] Figure 8 is a flowchart illustrating a method for manufacturing a display panel in one or more embodiments of this disclosure. Referring to Figure 8, a third aspect of this disclosure provides a method for manufacturing a display panel, which may include the following steps S101 to S105.

[0103] Step S101: Provide a substrate, which has a first light-emitting area, a second light-emitting area, a third light-emitting area, and a light-shielding area.

[0104] In step S102, multiple light-emitting structures are formed on the substrate, with the light-shielding area located between adjacent light-emitting structures.

[0105] In this embodiment, the plurality of light-emitting structures include a first light-emitting structure located in a first light-emitting region, a second light-emitting structure located in a second light-emitting region, and a third light-emitting structure located in a third light-emitting region.

[0106] Step S103: Lay an encapsulation layer on the light-emitting structure and the light-shielding area.

[0107] Step S104: An insulating layer is formed on the encapsulation layer. The insulating layer has a boss on the side away from the substrate. The orthogonal projection of the boss on the substrate is located in the third light-emitting region.

[0108] Step S105: A first color filter layer, a second color filter layer, and a third color filter layer are sequentially formed on the insulating layer.

[0109] In this embodiment, the orthographic projection of the first color filter layer onto the substrate is located in the first light-emitting area and the light-shielding area. The orthographic projection of the second color filter layer onto the substrate is located in the second light-emitting area and the light-shielding area. The orthographic projection of the third color filter layer onto the substrate is located in the third light-emitting area and the light-shielding area. The plane containing the surface of the first color filter layer closest to the substrate is located between the surface of the third color filter layer closest to the substrate and the substrate. Furthermore, in the light-shielding area, the orthographic projection of the first color filter layer onto the substrate overlaps with the orthographic projection of the third color filter layer onto the substrate.

[0110] In some embodiments, the plane containing the surface of the second color filter layer closest to the substrate may be located between the surface of the third color filter layer closest to the substrate and the substrate. Furthermore, in the light-shielding area, the orthographic projection of the second color filter layer onto the substrate overlaps with the orthographic projection of the third color filter layer onto the substrate.

[0111] Figure 9 is a flowchart of step S102 in one embodiment of the present disclosure. Referring to Figure 9, in one possible embodiment, step S104 may include the following steps S201 to S202.

[0112] Step S201: A first protective layer is formed on the encapsulation layer.

[0113] Step S202: The first protective layer is etched using a halftone mask to give the first protective layer a first high region and a first low region.

[0114] In this embodiment, in a direction perpendicular to the substrate, the thickness of the first protective layer in the first high region is greater than the thickness in the first low region. The first low region covers the first light-emitting region, the second light-emitting region, and the light-shielding region, while the first high region is located in the third light-emitting region.

[0115] In the above embodiments, the first protective layer is etched using a halftone mask to pattern the first protective layer, giving it a first high region and a first low region. The thickness difference between the first high region and the first low region is used to create a protrusion on the side of the insulating layer away from the substrate, thereby raising the third color film layer of the third light-emitting region and reducing the thickness of the third color film layer, thus improving the light extraction efficiency of the product.

[0116] For example, referring to Figure 9, step S105 may include steps S203 to S205 as follows.

[0117] Step S203: A first color filter layer is formed on the first protective layer of the first low region.

[0118] Step S204: A second color filter layer is formed on the first protective layer and the first color filter layer in the first low region.

[0119] Step S205: A third color filter layer is formed on the first protective layer and the second color filter layer in the first high region.

[0120] For example, before step S104, the manufacturing method may further include the following steps: forming a touch insulating layer on the encapsulation layer, etching the touch insulating layer, and forming a connecting hole in the touch insulating layer.

[0121] Figure 10 is a flowchart of step S102 in another embodiment of this disclosure. Referring to Figure 10, in another possible embodiment, step S104 may include the following steps S301 to S302.

[0122] Step S301: A touch insulating layer is formed on the encapsulation layer, and the touch insulating layer is etched to form a connecting hole in the touch insulating layer.

[0123] In this embodiment, the orthographic projection of the touch insulating layer on the substrate covers the first light-emitting area, the second light-emitting area, the third light-emitting area, and the light-shielding area.

[0124] Step S302: A first protective layer is formed on the touch insulating layer, and the first protective layer is etched.

[0125] In this embodiment, the orthogonal projection of the first protective layer onto the substrate is located in the third light-emitting region.

[0126] In the above embodiments, by etching the first protective layer, the first protective layer of the first light-emitting area, the second light-emitting area, and the light-shielding area is removed, leaving only the first protective layer of the third light-emitting area. By utilizing the thickness difference between the first protective layer and the touch insulating layer without the first protective layer, a protrusion is formed on the side of the insulating layer away from the substrate, thereby raising the third color film layer of the third light-emitting area, and thus reducing the thickness of the third color film layer, improving the light extraction efficiency of the product.

[0127] For example, referring to Figure 10, step S105 may include steps S303 to S305 as follows.

[0128] Step S303: Form a first color filter layer on the touch insulating layer.

[0129] Step S304: A second color filter layer is formed on the touch insulating layer and the first color filter layer.

[0130] Step S305: A third color filter layer is formed on the first protective layer and the second color filter layer.

[0131] Figure 11 is a flowchart of step S102 in another embodiment of this disclosure. Referring to Figure 11, in another possible embodiment, step S104 may include the following steps S401 to S402.

[0132] In step S401, an organic encapsulation material is used to form a touch insulating layer on the substrate, and the touch insulating layer is etched to form a connecting hole in the touch insulating layer.

[0133] In step S402, the touch insulating layer is etched using a halftone mask to create a second high region and a second low region in the touch insulating layer.

[0134] In this embodiment, in a direction perpendicular to the substrate, the thickness of the touch insulating layer in the second high region is greater than the thickness in the second low region. The second low region covers the first light-emitting region, the second light-emitting region, and the light-shielding region, while the second high region is located in the third light-emitting region.

[0135] In the above embodiments, the touch insulating layer is formed using an organic encapsulation material, which can replace the first protective layer to encapsulate the display panel. This eliminates the need for a separate first protective layer, saving on the formation process of the first protective layer and reducing process complexity and manufacturing costs. Furthermore, by etching the touch insulating layer using a halftone mask, the touch insulating layer is patterned, creating a second high region and a second low region. The thickness difference between the second high region and the second low region allows for the creation of a protrusion on the side of the insulating layer away from the substrate, thereby raising the third color filter layer of the third light-emitting region and reducing the thickness of the third color filter layer, thus improving the light extraction efficiency of the product.

[0136] For example, referring to Figure 11, step S105 may include steps S403 to S405 as follows.

[0137] Step S403: A first color filter layer is formed on the touch insulating layer in the second low region.

[0138] Step S404: A second color filter layer is formed on the touch insulating layer and the first color filter layer in the second low region.

[0139] In step S405, a third color filter layer is formed on the touch insulating layer and the second color filter layer in the second high region.

[0140] In some embodiments, the fabrication method may further include the step of forming a second touch metal layer on a substrate before forming the touch insulating layer.

[0141] After forming the touch insulating layer, the fabrication method may further include the following steps: forming a first touch metal layer on the side of the touch insulating layer away from the substrate and in the through hole, so as to connect with the second touch metal layer.

[0142] In some embodiments, prior to step S102, the fabrication method may further include the following steps: forming a pixel definition layer on a substrate, the pixel definition layer having a first opening located in a first light-emitting region, a second opening located in a second light-emitting region, and a third opening located in a third light-emitting region.

[0143] For example, step S103 may include the following steps: sequentially stacking a first passivation layer, a planarization layer, a second passivation layer and a buffer layer on the pixel definition layer, wherein the first passivation layer covers the pixel definition layer, the first light-emitting structure, the second light-emitting structure and the third light-emitting structure.

[0144] In some embodiments, after step S105, the manufacturing method may further include the following step: forming a second protective layer on the first color filter layer, the second color filter layer, and the third color filter layer.

[0145] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0146] In the description of this disclosure, it should be understood that the terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” and “counterclockwise” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0147] In this disclosure, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0148] Furthermore, the use of terms such as "first" and "second" in this disclosure is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this disclosure, "multiple" means two or more, unless otherwise explicitly specified.

[0149] Although embodiments of the present disclosure have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A display panel, comprising: The substrate (10) has a first light-emitting region (11), a second light-emitting region (12), a third light-emitting region (13), and a light-shielding region (14); Multiple light-emitting structures, including a first light-emitting structure (261) located in the first light-emitting area (11), a second light-emitting structure (262) located in the second light-emitting area (12), and a third light-emitting structure (263) located in the third light-emitting area (13), wherein the light-shielding area (14) is located between adjacent light-emitting structures; An encapsulation layer (27) covers the light-emitting structure and the light-shielding area (14); An insulating layer (21) is located on the side of the encapsulation layer (27) away from the substrate (10); the side of the insulating layer (21) away from the substrate (10) has a boss (210); the orthographic projection of the boss (210) on the substrate (10) is located in the third light-emitting area (13); The first color filter layer (31) is located on the side of the insulating layer (21) away from the substrate (10); the orthographic projection of the first color filter layer (31) on the substrate (10) is located in the first light-emitting area (11) and the light-shielding area (14); The second color filter layer (32) is located on the side of the insulating layer (21) away from the substrate (10) and on the side of the first color filter layer (31) away from the substrate (10); the orthographic projection of the second color filter layer (32) on the substrate (10) is located in the second light-emitting area (12) and the light-shielding area (14); as well as The third color filter layer (33) is located on the side of the boss (210) and the second color filter layer (32) away from the substrate (10); the orthographic projection of the third color filter layer (33) on the substrate (10) is located in the third light-emitting area (13) and at least part of the light-shielding area (14); The plane containing the surface of the first color filter layer (31) closest to the substrate (10) is located between the surface of the third color filter layer (33) closest to the substrate (10) and the substrate (10). In the light-shielding area (14), the orthographic projection of the first color filter layer (31) on the substrate (10) overlaps with the orthographic projection of the third color filter layer (33) on the substrate (10).

2. The display panel according to claim 1, wherein, The plane containing the surface of the second color filter layer (32) closest to the substrate (10) is located between the surface of the third color filter layer (33) closest to the substrate (10) and the substrate (10). In the light-shielding area (14), the orthographic projection of the second color filter layer (32) on the substrate (10) overlaps with the orthographic projection of the third color filter layer (33) on the substrate (10).

3. The display panel according to claim 2, wherein, In a direction perpendicular to the substrate (10), the height of the boss (210) is greater than the thickness of the first color filter layer (31).

4. The display panel according to claim 1, wherein, The insulating layer (21) is a first protective layer (22), which has a first high region (221) and a first low region (222). In a direction perpendicular to the substrate (10), the thickness of the first protective layer (22) in the first high region (221) is greater than the thickness in the first low region (222). The first low region (222) covers the first light-emitting region (11), the second light-emitting region (12) and the light-shielding region (14), and the first high region (221) is located in the third light-emitting region (13); the first color filter layer (31) is disposed on the first protective layer (22) of the first low region (222), the second color filter layer (32) is disposed on the first protective layer (22) of the first low region (222) and the first color filter layer (31) located in the light-shielding region (14), and the third color filter layer (33) is disposed on the first protective layer (22) of the first high region (221) and the second color filter layer (32) located in the light-shielding region (14).

5. The display panel according to claim 4, further comprising: A touch insulating layer (23) is located between the first protective layer (22) and the encapsulation layer (27); the touch insulating layer (23) has a through hole (230); A first touch metal layer (241) is located between the touch insulating layer (23) and the first protective layer (10); the first touch metal layer (241) includes a plurality of first touch sub-electrodes (91) arranged sequentially along a first direction and spaced apart from each other, and a plurality of second touch sub-electrodes (92) and a plurality of connecting electrodes (93) arranged sequentially along a second direction; the plurality of second touch sub-electrodes (92) and the plurality of connecting electrodes (93) are alternately distributed and connected sequentially to form a second touch electrode extending along the second direction; the first direction intersects the second direction, and the first touch sub-electrodes (91) and the second touch sub-electrodes (92) are spaced apart from each other; as well as A second touch metal layer (242) is located between the touch insulating layer (23) and the encapsulation layer (27); the second touch metal layer (242) includes a plurality of bridging electrodes spaced apart from each other; each of the bridging electrodes is connected to two adjacent first touch sub-electrodes through the connecting hole (230) to form a first touch electrode extending along the first direction.

6. The display panel according to claim 1, wherein, The insulating layer (21) includes: A touch insulating layer (23) is located on the side of the encapsulation layer (27) away from the substrate (10); the orthographic projection of the touch insulating layer (23) on the substrate (10) covers the first light-emitting area (11), the second light-emitting area (12), the third light-emitting area (13), and the light-shielding area (14); and The first protective layer (22) is located on the side of the touch insulating layer (23) away from the substrate (10); the orthographic projection of the first protective layer (22) on the substrate (10) is located in the third light-emitting area (13); The first color filter layer (31) is disposed on the touch insulating layer (23), the second color filter layer (32) is disposed on the touch insulating layer (23) and the first color filter layer (31) located in the light-shielding area (14), and the third color filter layer (33) is disposed on the first protective layer (22) and the second color filter layer (32) located in the light-shielding area (14).

7. The display panel according to claim 1, wherein, The insulating layer (21) is a touch insulating layer (23), which is formed using an organic encapsulation material and has a second high region (231) and a second low region (232). In a direction perpendicular to the substrate (10), the thickness of the touch insulating layer (23) in the second high region (231) is greater than the thickness in the second low region (232). The second low region (232) covers the first light-emitting region (11), the second light-emitting region (12) and the light-shielding region (14), and the second high region (231) is located in the third light-emitting region (13); the first color filter layer (31) is disposed on the touch insulating layer (23) of the second low region (232), the second color filter layer (32) is disposed on the touch insulating layer (23) of the second low region (232) and the first color filter layer (31) located in the light-shielding region (14), and the third color filter layer (33) is disposed on the touch insulating layer (23) of the second high region (231) and the second color filter layer (32) located in the light-shielding region (14).

8. The display panel according to claim 6 or 7, wherein, The touch insulating layer (23) has a through hole (230); Also includes: A first touch metal layer (241) is located between the touch insulating layer (23) and the first color filter layer (31); the first touch metal layer (241) includes a plurality of first touch sub-electrodes arranged sequentially and spaced apart from each other along a first direction, and a plurality of second touch sub-electrodes and a plurality of connecting electrodes arranged sequentially along a second direction; the plurality of second touch sub-electrodes and the plurality of connecting electrodes are alternately distributed and sequentially connected to form a second touch electrode extending along the second direction; the first direction intersects the second direction, and the first touch sub-electrodes and the second touch sub-electrodes are spaced apart from each other; and A second touch metal layer (242) is located between the touch insulating layer (23) and the encapsulation layer (27); the second touch metal layer (242) includes a plurality of bridging electrodes spaced apart from each other; each of the bridging electrodes is connected to two adjacent first touch sub-electrodes through the connecting hole (230) to form a first touch electrode extending along the first direction.

9. The display panel according to any one of claims 1-8, wherein, The refractive index of the first color filter layer (31) is less than that of the second color filter layer (32), and the refractive index of the second color filter layer (32) is less than that of the third color filter layer (33).

10. A display device comprising a display panel as described in any one of claims 1-9.

11. A method for manufacturing a display panel, comprising: A substrate is provided, the substrate having a first light-emitting region, a second light-emitting region, a third light-emitting region, and a light-shielding region; Multiple light-emitting structures are formed on the substrate, including a first light-emitting structure located in the first light-emitting region, a second light-emitting structure located in the second light-emitting region, and a third light-emitting structure located in the third light-emitting region, with the light-shielding region located between adjacent light-emitting structures; An encapsulation layer is laid on the light-emitting structure and the light-shielding area; An insulating layer is formed on the encapsulation layer, and a boss is provided on the side of the insulating layer away from the substrate. The orthogonal projection of the boss on the substrate is located in the third light-emitting region. as well as A first color filter layer, a second color filter layer, and a third color filter layer are sequentially formed on the insulating layer; the orthographic projection of the first color filter layer on the substrate is located between the first light-emitting area and the light-shielding area. The orthographic projection of the second color filter layer onto the substrate is located between the second light-emitting area and the light-shielding area; The orthographic projection of the third color filter layer on the substrate is located between the third light-emitting area and the light-shielding area; the plane containing the surface of the first color filter layer closest to the substrate is located between the surface of the third color filter layer closest to the substrate and the substrate, and in the light-shielding area, the orthographic projection of the first color filter layer on the substrate overlaps with the orthographic projection of the third color filter layer on the substrate.

12. The manufacturing method according to claim 11, wherein, The plane containing the surface of the second color filter layer closest to the substrate is located between the surface of the third color filter layer closest to the substrate and the substrate, and in the light-shielding area, the orthographic projection of the second color filter layer on the substrate overlaps with the orthographic projection of the third color filter layer on the substrate.

13. The manufacturing method according to claim 11 or 12, wherein, The formation of an insulating layer on the encapsulation layer includes: A first protective layer is formed on the encapsulation layer; and The first protective layer is etched using a halftone mask to create a first high region and a first low region. In a direction perpendicular to the substrate, the thickness of the first protective layer in the first high region is greater than its thickness in the first low region. The first low region covers the first light-emitting region, the second light-emitting region, and the light-shielding region, while the first high region is located in the third light-emitting region.

14. The manufacturing method according to claim 11 or 12, wherein, The formation of an insulating layer on the encapsulation layer includes: A touch-insulating layer is formed on the encapsulation layer, and the touch-insulating layer is etched to form a connecting hole within the touch-insulating layer; the orthographic projection of the touch-insulating layer on the substrate covers the first light-emitting area, the second light-emitting area, the third light-emitting area, and the light-shielding area; and A first protective layer is formed on the touch insulating layer, and the first protective layer is etched; the orthogonal projection of the first protective layer on the substrate is located in the third light-emitting area.

15. The manufacturing method according to claim 11 or 12, wherein, The formation of an insulating layer on the encapsulation layer includes: An organic encapsulation material is used to form a touch insulating layer on the encapsulation layer, and the touch insulating layer is etched to form a connecting hole within the touch insulating layer; and The touch insulating layer is etched using a halftone mask to create a second high region and a second low region. In a direction perpendicular to the substrate, the thickness of the touch insulating layer in the second high region is greater than its thickness in the second low region. The second low region covers the first light-emitting region, the second light-emitting region, and the light-shielding region, while the second high region is located within the third light-emitting region.

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