Display panel, manufacturing method thereof and display device

Abstract

The invention provides a display panel, a manufacturing method thereof and a display device, and belongs to the technical field of display. The display panel comprises: a substrate; the pixel circuit layer, the black pixel defining layer, the packaging layer and the flat layer are located on one side of the substrate and sequentially stacked in the direction away from the substrate, the black pixel defining layer is provided with a plurality of first openings, and the flat layer is provided with a plurality of second openings; a light-emitting element located in each first opening; the light filtering assemblies are located in the second openings respectively, each light filtering assembly comprises a light-transmitting protruding part and a light filtering unit covering the light-transmitting protruding part, each light-transmitting protruding part comprises a side surface forming an acute angle with the substrate base plate, and the color of the light filtering unit in each second opening is the same as that of the light emitting element in the corresponding first opening; the refractive index of the light-transmitting protruding part is larger than that of the light filtering unit. The light emitting efficiency of the display device under the positive visual angle can be improved.

Description

Display panel, manufacturing method thereof and display device TECHNICAL FIELD

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

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

[0003] SUMMARY

[0004] The technical problem to be solved by the present disclosure is to provide a display panel, a manufacturing method thereof and a display device, which can improve the light extraction efficiency of the display device at a normal viewing angle.

[0005] To solve the above technical problems, the technical solutions of the embodiments of the present disclosure are as follows:

[0006] In one aspect, a display panel is provided, comprising:

[0007] a substrate substrate;

[0008] a pixel circuit layer, a black pixel defining layer, an encapsulation layer and a planarization layer located on one side of the substrate substrate and stacked in sequence in a direction away from the substrate substrate, the black pixel defining layer has a plurality of first openings, the planarization layer has a plurality of second openings, the plurality of first openings and the plurality of second openings are arranged in intervals in a direction parallel to the bearing surface of the substrate substrate, and one-to-one correspondence;

[0009] a light-emitting element located in each of the first openings;

[0010] a light filtering assembly located in each of the second openings, the light filtering assembly comprising a light-transmitting protruding part and a light filtering unit covering the light-transmitting protruding part, the light-transmitting protruding part comprising a side surface forming an acute angle with the substrate substrate, the color of the light filtering unit in each of the second openings being the same as the color of the light-emitting element in the corresponding first opening;

[0011] wherein the refractive index of the light-transmitting protruding part is greater than the refractive index of the light filtering unit.

[0012] In some embodiments, the light filtering unit comprises first light filtering units and second light filtering units with different colors, the refractive index of the first light filtering units being greater than the refractive index of the second light filtering units, in each of the second openings,

[0013] The number of light-transmitting convex parts covered by the first light-filtering unit is greater than the number of light-transmitting convex parts covered by the second light-filtering unit.

[0014] And / or

[0015] The height of the light-transmitting convex parts covered by the first light-filtering unit is greater than the height of the light-transmitting convex parts covered by the second light-filtering unit.

[0016] In some embodiments, the acute angle is 65-85°.

[0017] In some embodiments, the orthographic projection of the first opening on the substrate substrate is located within the orthographic projection of a first boundary on the substrate substrate, the first boundary being a boundary of the light-transmitting convex part close to the second opening boundary.

[0018] In some embodiments, the distance between the boundary of the first opening and the first boundary is 0.5-2 microns.

[0019] In some embodiments, the cross section of the light-transmitting convex part in the direction perpendicular to the substrate substrate is a right trapezoid.

[0020] In some embodiments, the distance between the light-filtering assembly corresponding to the light-filtering unit with different refractive index and the light-emitting element is different.

[0021] In some embodiments, the light-filtering unit comprises first light-filtering unit and second light-filtering unit with different colors, the refractive index of the first light-filtering unit is greater than the refractive index of the second light-filtering unit, and the distance between the light-filtering assembly corresponding to the first light-filtering unit and the plane where the light-emitting element is located is greater than the distance between the light-filtering assembly corresponding to the second light-filtering unit and the plane where the light-emitting element is located.

[0022] In some embodiments, the light-filtering unit further comprises a third light-filtering unit, the refractive index of the third light-filtering unit is the same as that of the second light-filtering unit, and the distance between the light-filtering assembly corresponding to the third light-filtering unit and the plane where the light-emitting element is located is equal to the distance between the light-filtering assembly corresponding to the second light-filtering unit and the plane where the light-emitting element is located.

[0023] In some embodiments, the light-filtering unit further comprises a third light-filtering unit, the refractive index of the third light-filtering unit is less than that of the second light-filtering unit, and the distance between the light-filtering assembly corresponding to the third light-filtering unit and the plane where the light-emitting element is located is less than the distance between the light-filtering assembly corresponding to the second light-filtering unit and the plane where the light-emitting element is located.

[0024] In some embodiments, the orthographic projection of the first opening on the substrate substrate is located within the orthographic projection of the corresponding second opening on the substrate substrate.

[0025] In some embodiments, a minimum distance between a projection of a boundary of the second opening on the substrate and a projection of a boundary of the corresponding first opening on the substrate is 0.5-2 microns.

[0026] In some embodiments, the planar layer comprises a plurality of planar film layers stacked in sequence along a direction away from the substrate.

[0027] In some embodiments, a refractive index of at least one first planar film layer used to form the second opening is greater than a refractive index of the light filtering unit, and the at least one first planar film layer is disposed in the same layer and of the same material as the light-transmitting protrusion.

[0028] In some embodiments, a refractive index of a first planar film layer used to form the second opening is greater than 1.7.

[0029] In some embodiments, the plurality of planar film layers further comprises at least one second planar film layer, the second planar film layer is not provided with the second opening, and a refractive index of the second planar film layer is less than a refractive index of the light filtering unit.

[0030] In some embodiments, the display panel further comprises:

[0031] a black matrix located between adjacent light filtering assemblies, a projection of the black matrix on the substrate is located within a projection of the black pixel defining layer on the substrate.

[0032] In some embodiments, the display panel further comprises:

[0033] a touch electrode located between adjacent light filtering assemblies, a projection of the touch electrode on the substrate is located within a projection of the black matrix on the substrate.

[0034] Embodiments of the present disclosure further provide a display device comprising the display panel as described above.

[0035] Embodiments of the present disclosure further provide a manufacturing method of a display panel, comprising:

[0036] providing a substrate;

[0037] forming, in sequence on the substrate, a pixel circuit layer, a black pixel defining layer, an encapsulation layer, and a planar layer, the black pixel defining layer has a plurality of first openings, the planar layer has a plurality of second openings, the plurality of first openings and the plurality of second openings are arranged in intervals along a direction parallel to a bearing surface of the substrate, and one-to-one corresponding;

[0038] forming a light emitting element in the first opening.

[0039] forming a light filtering assembly in the second opening, the light filtering assembly comprising a light-transmitting protrusion and a light filtering unit covering the light-transmitting protrusion, the light-transmitting protrusion comprising a side surface forming an acute angle with the substrate base plate, the color of the light filtering unit in each of the second openings being the same as the color of the light emitting element in the corresponding first opening;

[0040] wherein the refractive index of the light-transmitting protrusion is greater than the refractive index of the light filtering unit.

[0041] Embodiments of the present disclosure have the following beneficial effects:

[0042] In the above scheme, the light filtering assembly comprises a light-transmitting protrusion and a light filtering unit covering the light-transmitting protrusion, the light-transmitting protrusion comprising a side surface forming an acute angle with the substrate base plate, the refractive index of the light-transmitting protrusion being greater than the refractive index of the light filtering unit, the light filtering unit covering the side surface of the light-transmitting protrusion, so that the large viewing angle light emitted by the light emitting element will be refracted on the side surface of the light-transmitting protrusion when exiting through the light-transmitting protrusion, and be deflected to a direction close to the normal viewing angle, thereby improving the light extraction efficiency at the normal viewing angle. BRIEF DESCRIPTION OF DRAWINGS

[0043] FIGS. 1-19 are structural schematic diagrams of display panels according to some embodiments of the present disclosure.

[0044] REFERENCE NUMERALS

[0045] 01 driving substrate

[0046] 02 anode

[0047] 031 red light emitting layer

[0048] 032 green light emitting layer

[0049] 033 blue light emitting layer

[0050] 04 black pixel defining layer

[0051] 05 cathode

[0052] 06 encapsulation layer

[0053] 07, 08, 09, 10 fourth planar film layer

[0054] 11 black matrix

[0055] 121 red light filtering unit

[0056] 122 green light filtering unit

[0057] 123 blue light filtering unit

[0058] 13 touch electrode

[0059] 14 Touching electrode bridging

[0060] 15 Light-transmitting protrusion DETAILED DESCRIPTION

[0061] To make the technical problems, technical solutions and advantages to be solved by embodiments of the present disclosure clearer, specific embodiments will be described in detail below with reference to the drawings.

[0062] For a display panel, the polarizer-Less (POL-Less) technology refers to a technology of replacing a traditional polarizer in the display panel with a color film or a color filter, which has the advantages of improving the light transmittance of the display panel, reducing the working power consumption of the display panel, and making the display panel thinner.

[0063] At present, common POL-Less technologies include a technology of integrating a color filter (CF) in an encapsulation layer (color on encapsulation, COE). A display panel using the COE technology can be referred to as a COE panel. The COE panel generally includes a substrate substrate and a pixel circuit layer, a pixel definition layer, an encapsulation layer and a black matrix layer which are sequentially stacked on one side of the substrate substrate. The pixel definition layer is used to separate light emitting elements of different colors. The black matrix layer is used to separate CFs corresponding to light emitting elements of different colors. The pixel circuit layer is used to drive the light emitting elements to emit light, and the light emitted by the light emitting elements can be filtered by the color CF and then emitted, so that the COE panel displays a color picture.

[0064] In order to further improve the light extraction efficiency of the display panel, a flat layer with low refractive index and a color filter with high refractive index are used to form a total reflection interface on the light extraction side of the display panel, so that the large-angle light emitted by the light emitting element is totally reflected at the total reflection interface, thereby improving the light extraction efficiency. However, the color filter includes filter units of different colors, and the refractive indexes of the filter units of different colors are different, which will cause the light extraction efficiency of light of different colors to be different, affecting the uniformity of light extraction.

[0065] Embodiments of the present disclosure provide a display panel and a manufacturing method thereof and a display device, which can improve the light extraction efficiency of the display device at a normal viewing angle.

[0066] Embodiments of the present disclosure provide a display panel, comprising:

[0067] a substrate substrate;

[0068] A pixel circuit layer, a black pixel defining layer, an encapsulation layer and a planarization layer are sequentially stacked on one side of the substrate and away from the substrate, the black pixel defining layer has a plurality of first openings, the planarization layer has a plurality of second openings, the plurality of first openings and the plurality of second openings are arranged in pairs and correspondingly in one-to-one correspondence;

[0069] A light emitting element is located in each of the first openings;

[0070] A light filtering assembly is located in each of the second openings, the light filtering assembly includes a light transmitting protrusion and a light filtering unit covering the light transmitting protrusion, the light transmitting protrusion includes a side surface forming an acute angle with the substrate, the color of the light filtering unit in each of the second openings is the same as the color of the light emitting element in the corresponding first opening;

[0071] The refractive index of the light transmitting protrusion is greater than the refractive index of the light filtering unit.

[0072] In the embodiment, the light filtering assembly includes a light transmitting protrusion and a light filtering unit covering the light transmitting protrusion, the light transmitting protrusion includes a side surface forming an acute angle with the substrate, the refractive index of the light transmitting protrusion is greater than the refractive index of the light filtering unit, and the light filtering unit covers the side surface of the light transmitting protrusion. In this way, when the large viewing angle light emitted by the light emitting element is emitted through the light transmitting protrusion, refraction occurs on the side surface of the light transmitting protrusion, and the light is deflected to a direction close to the normal viewing angle, thereby improving the light emitting efficiency at the normal viewing angle.

[0073] In some embodiments, the light filtering unit includes first light filtering units and second light filtering units with different colors, the refractive index of the first light filtering units is greater than the refractive index of the second light filtering units, the refractive index difference between the first light filtering units and the light transmitting protrusion is smaller than the refractive index difference between the second light filtering units and the light transmitting protrusion, the light emitting efficiency at the normal viewing angle of the first light filtering units is lower than the light emitting efficiency at the normal viewing angle of the second light filtering units, in order to reduce the difference in light emitting efficiency at the normal viewing angle between pixels of different colors, in each of the second openings, the number of light transmitting protrusions covered by the first light filtering units is greater than the number of light transmitting protrusions covered by the second light filtering units, so that the area of the side surface of the light transmitting protrusion covered by the first light filtering units can be increased, and the light emitted by the corresponding light emitting element is more likely to be refracted on the side surface of the light transmitting protrusion, and deflected to a direction close to the normal viewing angle, thereby reducing the difference in light emitting efficiency at the normal viewing angle between pixels of different colors.

[0074] In some embodiments, the light filtering unit comprises a first light filtering unit and a second light filtering unit with different colors, the refractive index of the first light filtering unit is greater than the refractive index of the second light filtering unit, the refractive index difference between the first light filtering unit and the light-transmitting convex part is smaller than the refractive index difference between the second light filtering unit and the light-transmitting convex part, the light extraction efficiency of the first light filtering unit at the normal viewing angle is lower than the light extraction efficiency of the second light filtering unit at the normal viewing angle, in order to reduce the light extraction efficiency difference of different color pixels at the normal viewing angle, in each second opening, the height of the light-transmitting convex part covered by the first light filtering unit is greater than the height of the light-transmitting convex part covered by the second light filtering unit, so as to increase the area of the side surface of the light-transmitting convex part covered by the first light filtering unit, the light emitted by the light emitting element corresponding to the first light filtering unit is more likely to be refracted on the side surface of the light-transmitting convex part and be deflected to the direction close to the normal viewing angle, thereby reducing the light extraction efficiency difference of different color pixels at the normal viewing angle.

[0075] In the embodiment, the acute angle between the side surface of the light-transmitting convex part and the substrate can be 65-85°, so as to ensure that the light with a large viewing angle emitted by the light emitting element is refracted on the side surface of the light-transmitting convex part when being emitted through the light-transmitting convex part, and is deflected to the direction close to the normal viewing angle, thereby improving the light extraction efficiency at the normal viewing angle.

[0076] In some embodiments, in order to ensure that most of the light with a large viewing angle emitted by the light emitting element is emitted through the light-transmitting convex part, the orthographic projection of the first opening on the substrate is located within the orthographic projection of the first boundary on the substrate, the first boundary is the boundary of the light-transmitting convex part close to the boundary of the second opening, and the distance between the boundary of the first opening and the first boundary can be 0.5-2 microns.

[0077] In the embodiment, the colors of the first light filtering unit, the second light filtering unit and the third light filtering unit are different, and the first light filtering unit, the second light filtering unit and the third light filtering unit can be selected from a red light filtering unit, a green light filtering unit and a blue light filtering unit.

[0078] In the specific embodiment one, as shown in FIG. 1, the display panel includes a driving substrate 01, an anode 02 and a black pixel defining layer 04 located on the driving substrate 01, the driving substrate 01 includes a substrate and a pixel circuit layer located on the substrate, the black pixel defining layer 04 defines a plurality of first openings, a red light emitting layer 031, a green light emitting layer 032 and a blue light emitting layer 033 are formed in the first openings, the display panel further includes a cathode 05 and an encapsulation layer 06 located on a side of the light emitting layer away from the driving substrate. In a direction away from the driving substrate, the encapsulation layer 06 is sequentially provided with a planarization film layer 07, a planarization film layer 08, a planarization film layer 09 and a planarization film layer 10, the planarization film layer 07 defines a plurality of second openings, a red filter unit 121, a green filter unit 122 and a blue filter unit 123 are formed in the second openings defined by the planarization film layer 07, and the second openings defined by the planarization film layer 07 correspond to the first openings one by one.

[0079] In the embodiment, the planarization film layer 07 is further used to form a light-transmitting protruding part 15 in the second opening, the refractive index of the planarization film layer 07 can be greater than 1.7, the refractive indexes of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 are all less than 1.7, the slope angle a of the side surface of the light-transmitting protruding part 15 can be 65-85°, and the thickness of the planarization film layer 07 can be 1.5-2.5 microns. The orthographic projection of the light-transmitting protruding part 15 on the driving substrate 01 covers the orthographic projection of the first opening on the driving substrate 01, the distance d1 between the first boundary of the light-transmitting protruding part 15 close to the boundary of the second opening and the boundary of the first opening is 0.5-2 microns, and the distance d2 between the first boundary and the boundary of the second opening is 0.5-2 microns. The thickness of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 can be 2-4 microns, the red filter unit 121, the green filter unit 122 and the blue filter unit 123 completely cover the light-transmitting protruding part 15, but do not cover the planarization film layer 07 outside the second opening area. In the embodiment, the planarization film layer 08, the planarization film layer 09 and the planarization film layer 10 can be prepared by using transparent resins with a refractive index of 1.45-1.5.

[0080] A black matrix 11 is formed on the side of the planar film layer 09 away from the driving substrate 01, and the orthogonal projection of the black matrix 11 on the substrate is located within the orthogonal projection of the black pixel defining layer 04 on the substrate; a touch electrode 13 can also be formed on the side of the planar film layer 07 away from the driving substrate 01, so that the display panel can integrate a touch function; in order not to affect display, the orthogonal projection of the touch electrode 13 on the substrate is located within the orthogonal projection of the black matrix 11 on the substrate. A touch electrode bridge 14 can also be formed on the side of the planar film layer 08 away from the driving substrate 01, and in order not to affect display, the orthogonal projection of the touch electrode bridge 14 on the substrate is located within the orthogonal projection of the black matrix 11 on the substrate.

[0081] In this embodiment, the cross section of the light-transmitting protruding part 15 in the direction perpendicular to the substrate is a right trapezoid, and the refractive index of the light-transmitting protruding part 15 is greater than the refractive index of the filter unit; thus, the light rays emitted by the light-emitting element at an oblique viewing angle will be refracted on the side surface of the light-transmitting protruding part 15 and be deflected toward the direction close to the normal viewing angle, thereby improving the light-emitting efficiency at the normal viewing angle.

[0082] In this embodiment, the preparation sequence of the film layers in the preparation of the display panel is: the planar film layer 07, the red filter unit 121, the green filter unit 122, the blue filter unit 123, the touch electrode 13, the planar film layer 08, the touch electrode bridge 14, the planar film layer 09, the black matrix 11, and the planar film layer 10. In this embodiment, the planar film layer 08, the planar film layer 09, and the planar film layer 10 do not form the second openings.

[0083] In a specific embodiment two, as shown in FIG. 2, the display panel includes a driving substrate 01, an anode 02 and a black pixel defining layer 04 on the driving substrate 01, the driving substrate 01 includes a substrate and a pixel circuit layer on the substrate, the black pixel defining layer 04 defines a plurality of first openings, and a red light-emitting layer 031, a green light-emitting layer 032, and a blue light-emitting layer 033 are formed in the first openings; the display panel further includes a cathode 05 and an encapsulation layer 06 on the side of the light-emitting layer away from the driving substrate. In the direction away from the driving substrate, the planar film layer 07, the planar film layer 08, the planar film layer 09, and the planar film layer 10 are sequentially formed on the encapsulation layer 06, the planar film layer 07 defines a plurality of second openings, a red filter unit 121, a green filter unit 122, and a blue filter unit 123 are formed in the second openings defined by the planar film layer 07, and the second openings defined by the planar film layer 07 correspond to the first openings one by one.

[0084] In the embodiment, the flat film layer 07 is used to form the light-transmitting convex part 15 in the second opening. The refractive index of the flat film layer 07 can be greater than 1.7, the refractive index of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 is less than 1.7, the slope angle a of the side surface of the light-transmitting convex part 15 can be 65-85°, and the thickness of the flat film layer 07 can be 1.5-2.5 microns. The orthographic projection of the light-transmitting convex part 15 on the driving substrate 01 covers the orthographic projection of the first opening on the driving substrate 01, the distance d1 between the first boundary of the light-transmitting convex part 15 close to the boundary of the second opening and the boundary of the first opening is 0.5-2 microns, and the distance d2 between the first boundary and the boundary of the second opening is 0.5-2 microns. The thickness of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 can be 2-4 microns, the red filter unit 121, the green filter unit 122 and the blue filter unit 123 completely cover the light-transmitting convex part 15, but do not cover the flat film layer 07 outside the second opening area. In the embodiment, the flat film layer 08, the flat film layer 09 and the flat film layer 10 can be made of transparent resin with a refractive index of 1.45-1.5.

[0085] The black matrix 11 is formed on the side of the flat film layer 09 away from the driving substrate 01, and the orthographic projection of the black matrix 11 on the substrate substrate is located in the orthographic projection of the black pixel defining layer 04 on the substrate substrate. The touch electrode 13 can also be formed on the side of the flat film layer 07 away from the driving substrate 01, so that the display panel integrates the touch function. In order not to affect the display, the orthographic projection of the touch electrode 13 on the substrate substrate is located in the orthographic projection of the black matrix 11 on the substrate substrate. The touch electrode bridge 14 can also be formed on the side of the flat film layer 08 away from the driving substrate 01. In order not to affect the display, the orthographic projection of the touch electrode bridge 14 on the substrate substrate is located in the orthographic projection of the black matrix 11 on the substrate substrate.

[0086] In the embodiment, the cross section of the light-transmitting convex part 15 perpendicular to the substrate substrate is a right trapezoid, and the refractive index of the light-transmitting convex part 15 is greater than the refractive index of the filter unit. Therefore, the light emitted by the light-emitting element at the oblique viewing angle will be refracted on the side surface of the light-transmitting convex part 15 and deviated to the direction close to the normal viewing angle, so as to improve the light-emitting efficiency at the normal viewing angle.

[0087] In the embodiment, the refractive index of the red filter unit 121 is greater than the refractive index of the green filter unit 122 and the blue filter unit 123, and the difference between the refractive index of the red filter unit 121 and the refractive index of the light-transmitting convex part 15 is smaller than the difference between the refractive index of the green filter unit 122 and the blue filter unit 123 and the refractive index of the light-transmitting convex part 15. In this way, the light-emitting efficiency of the red pixel at the normal viewing angle will be lower than the light-emitting efficiency of the green pixel and the blue pixel at the normal viewing angle. In order to reduce the difference in light-emitting efficiency at the normal viewing angle between pixels of different colors, the number of light-transmitting convex parts 15 covered by the red filter unit 121 is greater than the number of light-transmitting convex parts 15 covered by the green filter unit 122 and the blue filter unit 123. The area of the side surface of the light-transmitting convex part 15 covered by the red filter unit 121 can be increased, so that the light emitted by the red light-emitting element is more likely to be refracted at the side surface of the light-transmitting convex part 15 and be deflected in a direction close to the normal viewing angle, thereby reducing the difference in light-emitting efficiency at the normal viewing angle between pixels of different colors.

[0088] In the embodiment, when the display panel is prepared, the preparation sequence of each film layer is: the flat film layer 07, the red filter unit 121, the green filter unit 122, the blue filter unit 123, the touch electrode 13, the flat film layer 08, the touch electrode bridge 14, the flat film layer 09, the black matrix 11, and the flat film layer 10. In the embodiment, the flat film layer 08, the flat film layer 09, and the flat film layer 10 do not form the second opening.

[0089] In the third embodiment, as shown in FIG. 3, the display panel includes a driving substrate 01, an anode 02 and a black pixel defining layer 04 located on the driving substrate 01, the driving substrate 01 includes a substrate and a pixel circuit layer located on the substrate, and the black pixel defining layer 04 defines a plurality of first openings. A red light-emitting layer 031, a green light-emitting layer 032, and a blue light-emitting layer 033 are formed in the first openings. The display panel further includes a cathode 05 and an encapsulation layer 06 located on the side of the light-emitting layer away from the driving substrate. In the direction away from the driving substrate, the flat film layer 07, the flat film layer 08, the flat film layer 09, and the flat film layer 10 are sequentially formed on the encapsulation layer 06. The flat film layer 08 defines a plurality of second openings. The red filter unit 121, the green filter unit 122, and the blue filter unit 123 are formed in the second openings defined by the flat film layer 08. The second openings defined by the flat film layer 08 correspond one-to-one to the first openings.

[0090] In the embodiment, the flat film layer 08 is used to form the light-transmitting convex part 15 in the second opening. The refractive index of the flat film layer 08 can be greater than 1.7, the refractive index of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 can be less than 1.7, the slope angle a of the side surface of the light-transmitting convex part 15 can be 65-85°, and the thickness of the flat film layer 08 can be 1.5-2.5 microns. The orthographic projection of the light-transmitting convex part 15 on the driving substrate 01 covers the orthographic projection of the first opening on the driving substrate 01, the distance between the first boundary of the light-transmitting convex part 15 close to the boundary of the second opening and the boundary of the first opening is 0.5-2 microns, and the distance between the first boundary and the boundary of the second opening is 0.5-2 microns. The thickness of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 can be 2-4 microns, the red filter unit 121, the green filter unit 122 and the blue filter unit 123 completely cover the light-transmitting convex part 15, but do not cover the flat film layer 08 outside the second opening area. In the embodiment, the flat film layer 07, the flat film layer 09 and the flat film layer 10 can be made of transparent resin with a refractive index of 1.45-1.5.

[0091] The black matrix 11 is formed on the side of the flat film layer 09 away from the driving substrate 01, and the orthographic projection of the black matrix 11 on the substrate substrate is located in the orthographic projection of the black pixel defining layer 04 on the substrate substrate. The touch electrode 13 can also be formed on the side of the flat film layer 07 away from the driving substrate 01, so that the display panel integrates the touch function. In order not to affect the display, the orthographic projection of the touch electrode 13 on the substrate substrate is located in the orthographic projection of the black matrix 11 on the substrate substrate. The touch electrode bridge 14 can also be formed on the side of the flat film layer 08 away from the driving substrate 01. In order not to affect the display, the orthographic projection of the touch electrode bridge 14 on the substrate substrate is located in the orthographic projection of the black matrix 11 on the substrate substrate.

[0092] In the embodiment, the cross section of the light-transmitting convex part 15 in the direction perpendicular to the substrate substrate is a right trapezoid, and the refractive index of the light-transmitting convex part 15 is greater than the refractive index of the filter unit. In this way, the light emitted by the light-emitting element at the oblique viewing angle and exiting the light-transmitting convex part 15 will be refracted on the side surface of the light-transmitting convex part 15, and be deflected to the direction close to the normal viewing angle, thereby improving the light-emitting efficiency at the normal viewing angle.

[0093] In the embodiment, the preparation sequence of each film layer in the preparation of the display panel is: the flat film layer 07, the touch electrode 13, the flat film layer 08, the red filter unit 121, the green filter unit 122, the blue filter unit 123, the touch electrode bridge 14, the flat film layer 09, the black matrix 11 and the flat film layer 10. In the embodiment, the flat film layer 07, the flat film layer 09 and the flat film layer 10 do not form the second opening.

[0094] In the fourth embodiment, as shown in FIG. 4, the refractive index of the red filter unit 121 is greater than the refractive index of the green filter unit 122 and the blue filter unit 123, and the difference between the refractive index of the red filter unit 121 and the refractive index of the light-transmitting convex part 15 is smaller than the difference between the refractive index of the green filter unit 122 and the blue filter unit 123 and the refractive index of the light-transmitting convex part 15, so that the light-emitting efficiency of the red pixel at the normal viewing angle is lower than the light-emitting efficiency of the green pixel and the blue pixel at the normal viewing angle. In order to reduce the difference in light-emitting efficiency at the normal viewing angle between different color pixels, the number of light-transmitting convex parts 15 covered by the red filter unit 121 is greater than the number of light-transmitting convex parts 15 covered by the green filter unit 122 and the blue filter unit 123, and the area of the side surface of the light-transmitting convex part 15 covered by the red filter unit 121 can be increased, so that the light emitted by the red light-emitting element is more likely to be refracted at the side surface of the light-transmitting convex part 15 and be deflected to a direction close to the normal viewing angle, thereby reducing the difference in light-emitting efficiency at the normal viewing angle between different color pixels.

[0095] In the fifth embodiment, as shown in FIG. 5, the display panel includes a driving substrate 01, an anode 02 and a black pixel defining layer 04 located on the driving substrate 01, the driving substrate 01 includes a substrate and a pixel circuit layer located on the substrate, and the black pixel defining layer 04 defines a plurality of first openings, and a red light-emitting layer 031, a green light-emitting layer 032 and a blue light-emitting layer 033 are formed in the first openings. The display panel further includes a cathode 05 and an encapsulation layer 06 located on the side of the light-emitting layer away from the driving substrate. In the direction away from the driving substrate, the encapsulation layer 06 is sequentially provided with a planarization film layer 07, a planarization film layer 08, a planarization film layer 09 and a planarization film layer 10, the planarization film layer 09 defines a plurality of second openings, and the red filter unit 121, the green filter unit 122 and the blue filter unit 123 are formed in the second openings defined by the planarization film layer 09, and the second openings defined by the planarization film layer 09 correspond one by one to the first openings.

[0096] In the embodiment, the flat film layer 09 is used to form the light-transmitting convex part 15 in the second opening. The refractive index of the flat film layer 09 can be greater than 1.7, the refractive index of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 can be less than 1.7, the slope angle of the side surface of the light-transmitting convex part 15 can be 65-85°, and the thickness of the flat film layer 09 can be 1.5-2.5 microns. The orthographic projection of the light-transmitting convex part 15 on the driving substrate 01 covers the orthographic projection of the first opening on the driving substrate 01, the distance between the first boundary of the light-transmitting convex part 15 close to the boundary of the second opening and the boundary of the first opening is 0.5-2 microns, and the distance between the first boundary and the boundary of the second opening is 0.5-2 microns. The thickness of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 can be 2-4 microns, the red filter unit 121, the green filter unit 122 and the blue filter unit 123 completely cover the light-transmitting convex part 15, but do not cover the flat film layer 09 outside the second opening area. In the embodiment, the flat film layer 07, the flat film layer 08 and the flat film layer 10 can be made of transparent resin with a refractive index of 1.45-1.5.

[0097] The black matrix 11 is formed on the side of the flat film layer 09 away from the driving substrate 01, and the orthographic projection of the black matrix 11 on the substrate substrate is located in the orthographic projection of the black pixel defining layer 04 on the substrate substrate. The touch electrode 13 can also be formed on the side of the flat film layer 07 away from the driving substrate 01, so that the display panel integrates the touch function. In order not to affect the display, the orthographic projection of the touch electrode 13 on the substrate substrate is located in the orthographic projection of the black matrix 11 on the substrate substrate. The touch electrode bridge 14 can also be formed on the side of the flat film layer 08 away from the driving substrate 01. In order not to affect the display, the orthographic projection of the touch electrode bridge 14 on the substrate substrate is located in the orthographic projection of the black matrix 11 on the substrate substrate.

[0098] In the embodiment, the cross section of the light-transmitting convex part 15 in the direction perpendicular to the substrate substrate is a right trapezoid, and the refractive index of the light-transmitting convex part 15 is greater than the refractive index of the filter unit. In this way, the light emitted by the light-emitting element at the oblique viewing angle and exiting the light-transmitting convex part 15 will be refracted on the side surface of the light-transmitting convex part 15, and be deflected to the direction close to the normal viewing angle, thereby improving the light-emitting efficiency at the normal viewing angle.

[0099] In the embodiment, the preparation sequence of each film layer in the preparation of the display panel is: the flat film layer 07, the touch electrode 13, the flat film layer 08, the touch electrode bridge 14, the flat film layer 09, the red filter unit 121, the green filter unit 122, the blue filter unit 123, the black matrix 11 and the flat film layer 10. In the embodiment, the flat film layer 07, the flat film layer 08 and the flat film layer 10 do not form the second opening.

[0100] In the sixth embodiment, as shown in FIG. 6, the refractive index of the red filter unit 121 is greater than the refractive index of the green filter unit 122 and the blue filter unit 123, and the difference between the refractive index of the red filter unit 121 and the refractive index of the light-transmitting convex part 15 is smaller than the difference between the refractive index of the green filter unit 122 and the blue filter unit 123 and the refractive index of the light-transmitting convex part 15, so that the light-emitting efficiency of the red pixel at the normal viewing angle is lower than the light-emitting efficiency of the green pixel and the blue pixel at the normal viewing angle. In order to reduce the difference in the light-emitting efficiency of different color pixels at the normal viewing angle, the number of the light-transmitting convex parts 15 covered by the red filter unit 121 is greater than the number of the light-transmitting convex parts 15 covered by the green filter unit 122 and the blue filter unit 123, and the area of the side surface of the light-transmitting convex part 15 covered by the red filter unit 121 can be increased, so that the light emitted by the red light-emitting element is more likely to be refracted at the side surface of the light-transmitting convex part 15 and be deflected to the direction close to the normal viewing angle, thereby reducing the difference in the light-emitting efficiency of different color pixels at the normal viewing angle.

[0101] In the seventh embodiment, as shown in FIG. 7, the display panel includes a driving substrate 01, an anode 02 and a black pixel defining layer 04 located on the driving substrate 01, the driving substrate 01 includes a substrate and a pixel circuit layer located on the substrate, and the black pixel defining layer 04 defines a plurality of first openings, and a red light-emitting layer 031, a green light-emitting layer 032 and a blue light-emitting layer 033 are formed in the first openings. The display panel further includes a cathode 05 and an encapsulation layer 06 located on the side of the light-emitting layer away from the driving substrate. In the direction away from the driving substrate, the encapsulation layer 06 is sequentially provided with a planarization film layer 07, a planarization film layer 08, a planarization film layer 09 and a planarization film layer 10, the planarization film layer 07 and the planarization film layer 08 define a plurality of second openings, and the red filter unit 121, the green filter unit 122 and the blue filter unit 123 are formed in the second openings defined by the planarization film layer 07 and the planarization film layer 08, and the second openings defined by the planarization film layer 07 and the planarization film layer 08 correspond to the first openings one by one.

[0102] In the embodiment, the light-transmitting convex part 15 is formed in the second opening by the flat film layer 07 and the flat film layer 08, the refractive index of the flat film layer 07 and the flat film layer 08 can be greater than 1.7, the refractive index of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 is less than 1.7, the slope angle of the side surface of the light-transmitting convex part 15 can be 65-85°, and the thickness of the flat film layer 07 and the flat film layer 08 can be 1.5-2.5 microns. The orthographic projection of the light-transmitting convex part 15 on the driving substrate 01 covers the orthographic projection of the first opening on the driving substrate 01, the distance between the first boundary of the light-transmitting convex part 15 close to the boundary of the second opening and the boundary of the first opening is 0.5-2 microns, and the distance between the first boundary and the boundary of the second opening is 0.5-2 microns. The thickness of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 can be 2-4 microns, the red filter unit 121, the green filter unit 122 and the blue filter unit 123 completely cover the light-transmitting convex part 15, but do not cover the flat film layer 07 and the flat film layer 08 outside the second opening area. In the embodiment, the flat film layer 09 and the flat film layer 10 can be prepared by using transparent resin with a refractive index of 1.45-1.5.

[0103] The black matrix 11 is formed on the side of the flat film layer 09 away from the driving substrate 01, and the orthographic projection of the black matrix 11 on the substrate substrate is located in the orthographic projection of the black pixel defining layer 04 on the substrate substrate. The touch electrode 13 can also be formed on the side of the flat film layer 07 away from the driving substrate 01, so that the display panel integrates the touch function. In order not to affect the display, the orthographic projection of the touch electrode 13 on the substrate substrate is located in the orthographic projection of the black matrix 11 on the substrate substrate. The touch electrode bridge 14 can also be formed on the side of the flat film layer 08 away from the driving substrate 01. In order not to affect the display, the orthographic projection of the touch electrode bridge 14 on the substrate substrate is located in the orthographic projection of the black matrix 11 on the substrate substrate.

[0104] In the embodiment, the cross section of the light-transmitting convex part 15 in the direction perpendicular to the substrate substrate is a right trapezoid, and the refractive index of the light-transmitting convex part 15 is greater than the refractive index of the filter unit. In this way, the light ray emitted by the light-emitting element at the oblique viewing angle will be refracted on the side surface of the light-transmitting convex part 15 and be deflected to the direction close to the normal viewing angle, thereby improving the light-emitting efficiency at the normal viewing angle.

[0105] In the embodiment, the refractive index of the red filter unit 121 is greater than the refractive index of the green filter unit 122 and the blue filter unit 123, and the refractive index difference between the red filter unit 121 and the light-transmitting convex part 15 is smaller than the refractive index difference between the green filter unit 122 and the blue filter unit 123 and the light-transmitting convex part 15. Thus, the light-emitting efficiency of the red pixel at the normal viewing angle is lower than that of the green pixel and the blue pixel at the normal viewing angle. In order to reduce the light-emitting efficiency difference of the pixels of different colors at the normal viewing angle, the light-transmitting convex part 15 covered by the red filter unit 121 is composed of the flat film layer 07 and the flat film layer 08, the light-transmitting convex part 15 covered by the green filter unit 122 and the blue filter unit 123 is composed of only the flat film layer 07, and the height of the light-transmitting convex part 15 covered by the red filter unit 121 is greater than the height of the light-transmitting convex part 15 covered by the green filter unit 122 and the blue filter unit 123. The area of the side surface of the light-transmitting convex part 15 covered by the red filter unit 121 can be increased. Thus, the light emitted by the red light-emitting element is more likely to be refracted at the side surface of the light-transmitting convex part 15 and deviated to the direction close to the normal viewing angle, thereby reducing the light-emitting efficiency difference of the pixels of different colors at the normal viewing angle.

[0106] In the embodiment, when the display panel is prepared, the preparation sequence of each film layer is as follows: the flat film layer 07, the green filter unit 122, the blue filter unit 123, the touch electrode 13, the flat film layer 08, the red filter unit 121, the touch electrode bridge 14, the flat film layer 09, the black matrix 11, and the flat film layer 10. In the embodiment, the flat film layer 09 and the flat film layer 10 do not form the second opening.

[0107] In the eighth embodiment, as shown in FIG. 8, the refractive index of the red filter unit 121 is greater than the refractive index of the green filter unit 122 and the blue filter unit 123, and the refractive index difference between the red filter unit 121 and the light-transmitting convex part 15 is smaller than the refractive index difference between the green filter unit 122 and the blue filter unit 123 and the light-transmitting convex part 15. Thus, the light-emitting efficiency of the red pixel at the normal viewing angle is lower than that of the green pixel and the blue pixel at the normal viewing angle. In order to reduce the light-emitting efficiency difference of the pixels of different colors at the normal viewing angle, the number of the light-transmitting convex parts 15 covered by the red filter unit 121 is greater than the number of the light-transmitting convex parts 15 covered by the green filter unit 122 and the blue filter unit 123, and the height of the light-transmitting convex part 15 covered by the red filter unit 121 is greater than the height of the light-transmitting convex part 15 covered by the green filter unit 122 and the blue filter unit 123. The area of the side surface of the light-transmitting convex part 15 covered by the red filter unit 121 can be increased. Thus, the light emitted by the red light-emitting element is more likely to be refracted at the side surface of the light-transmitting convex part 15 and deviated to the direction close to the normal viewing angle, thereby reducing the light-emitting efficiency difference of the pixels of different colors at the normal viewing angle.

[0108] In the ninth embodiment, as shown in FIG. 9, the display panel includes a driving substrate 01, an anode 02 and a black pixel defining layer 04 on the driving substrate 01, the driving substrate 01 including a substrate and a pixel circuit layer on the substrate, the black pixel defining layer 04 defining a plurality of first openings, a red light-emitting layer 031, a green light-emitting layer 032 and a blue light-emitting layer 033 being formed in the first openings, the display panel further including a cathode 05 and an encapsulation layer 06 on a side of the light-emitting layer away from the driving substrate. In a direction away from the driving substrate, the encapsulation layer 06 sequentially has a planarization film layer 07, a planarization film layer 08, a planarization film layer 09 and a planarization film layer 10, the planarization film layer 09 and the planarization film layer 08 defining a plurality of second openings, a red filter unit 121, a green filter unit 122 and a blue filter unit 123 being formed in the second openings defined by the planarization film layer 09 and the planarization film layer 08, the second openings defined by the planarization film layer 09 and the planarization film layer 08 corresponding to the first openings one by one.

[0109] In the embodiment, the planarization film layer 09 and the planarization film layer 08 are used to form a light-transmitting protruding part 15 in the second openings, the refractive index of the planarization film layer 09 and the planarization film layer 08 can be greater than 1.7, the refractive index of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 are all less than 1.7, the slope angle of the side surface of the light-transmitting protruding part 15 can be 65-85°, the thickness of the planarization film layer 09 and the planarization film layer 08 can be 1.5-2.5 microns. The orthographic projection of the light-transmitting protruding part 15 on the driving substrate 01 covers the orthographic projection of the first opening on the driving substrate 01, the distance between a first boundary of the light-transmitting protruding part 15 close to the boundary of the second opening and the boundary of the first opening is 0.5-2 microns, the distance between the first boundary and the boundary of the second opening is 0.5-2 microns. The thickness of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 can be 2-4 microns, the red filter unit 121, the green filter unit 122 and the blue filter unit 123 completely cover the light-transmitting protruding part 15, but do not cover the planarization film layer 09 and the planarization film layer 08 outside the second opening area. In the embodiment, the planarization film layer 07 and the planarization film layer 10 can be made of transparent resin with a refractive index of 1.45-1.5.

[0110] The black matrix 11 is formed on the side of the flat film layer 09 away from the driving substrate 01, and the orthographic projection of the black matrix 11 on the substrate is located in the orthographic projection of the black pixel defining layer 04 on the substrate; the touch electrode 13 can also be formed on the side of the flat film layer 07 away from the driving substrate 01, so that the display panel integrates the touch function; in order not to affect the display, the orthographic projection of the touch electrode 13 on the substrate is located in the orthographic projection of the black matrix 11 on the substrate. The touch electrode bridge 14 can also be formed on the side of the flat film layer 08 away from the driving substrate 01, and in order not to affect the display, the orthographic projection of the touch electrode bridge 14 on the substrate is located in the orthographic projection of the black matrix 11 on the substrate.

[0111] In the embodiment, the cross section of the light-transmitting convex part 15 in the direction perpendicular to the substrate is a right trapezoid, and the refractive index of the light-transmitting convex part 15 is greater than the refractive index of the filter unit, so that the light emitted by the light-emitting element at the oblique viewing angle and exiting the light-transmitting convex part 15 is refracted on the side surface of the light-transmitting convex part 15 and deviated to the direction close to the normal viewing angle, thereby improving the light-emitting efficiency at the normal viewing angle.

[0112] In the embodiment, the refractive index of the red filter unit 121 is greater than the refractive index of the green filter unit 122 and the blue filter unit 123, and the difference between the refractive index of the red filter unit 121 and the light-transmitting convex part 15 is smaller than the difference between the refractive index of the green filter unit 122 and the blue filter unit 123 and the light-transmitting convex part 15, so that the light-emitting efficiency at the normal viewing angle of the red pixel is lower than the light-emitting efficiency at the normal viewing angle of the green pixel and the blue pixel; in order to reduce the difference in the light-emitting efficiency at the normal viewing angle of different color pixels, the light-transmitting convex part 15 covered by the red filter unit 121 is composed of the flat film layer 09 and the flat film layer 08, the light-transmitting convex part 15 covered by the green filter unit 122 and the blue filter unit 123 is composed of only the flat film layer 08, and the height of the light-transmitting convex part 15 covered by the red filter unit 121 is greater than the height of the light-transmitting convex part 15 covered by the green filter unit 122 and the blue filter unit 123, so that the area of the side surface of the light-transmitting convex part 15 covered by the red filter unit 121 can be increased, and the light emitted by the red light-emitting element is more likely to be refracted on the side surface of the light-transmitting convex part 15 and deviated to the direction close to the normal viewing angle, thereby reducing the difference in the light-emitting efficiency at the normal viewing angle of different color pixels.

[0113] In the embodiment, the preparation sequence of each film layer in the preparation of the display panel is: the flat film layer 07, the touch electrode 13, the flat film layer 08, the green filter unit 122, the blue filter unit 123, the touch electrode bridge 14, the flat film layer 09, the red filter unit 121, the black matrix 11, and the flat film layer 10. In the embodiment, the flat film layer 07 and the flat film layer 10 do not form the second opening.

[0114] In a tenth embodiment, as shown in FIG. 10, the refractive index of the red filter unit 121 is greater than the refractive index of the green filter unit 122 and the blue filter unit 123, and the refractive index difference between the red filter unit 121 and the light-transmitting convex part 15 is smaller than the refractive index difference between the green filter unit 122 and the blue filter unit 123 and the light-transmitting convex part 15, so that the light-emitting efficiency of the red pixel at the normal viewing angle is lower than the light-emitting efficiency of the green pixel and the blue pixel at the normal viewing angle. In order to reduce the difference in light-emitting efficiency of different color pixels at the normal viewing angle, the number of light-transmitting convex parts 15 covered by the red filter unit 121 is greater than the number of light-transmitting convex parts 15 covered by the green filter unit 122 and the blue filter unit 123, and the height of the light-transmitting convex part 15 covered by the red filter unit 121 is greater than the height of the light-transmitting convex part 15 covered by the green filter unit 122 and the blue filter unit 123, so that the area of the side surface of the light-transmitting convex part 15 covered by the red filter unit 121 can be increased, and thus the light emitted by the red light-emitting element is more likely to be refracted at the side surface of the light-transmitting convex part 15 and be deflected to a direction close to the normal viewing angle, thereby reducing the difference in light-emitting efficiency of different color pixels at the normal viewing angle.

[0115] In some embodiments, the distance between the filter assembly corresponding to the filter unit with different refractive index and the light-emitting element is different. The refractive index difference between the filter unit with different refractive index and the light-transmitting convex part is different, resulting in a difference in light-emitting efficiency at the normal viewing angle. By adjusting the distance between the filter unit and the light-emitting element, the light-emitting efficiency of light of different colors at the normal viewing angle can be adjusted, and the uniformity of light emitted by the display device can be improved.

[0116] In some embodiments, the filter unit includes first filter units and second filter units with different colors, the refractive index of the first filter units is greater than the refractive index of the second filter units, and the refractive index difference between the second filter units and the light-transmitting convex part is greater, so that the light emitted by the light-emitting element at a large viewing angle is more likely to be refracted at the interface between the second filter unit and the light-transmitting convex part. In order to balance the light-emitting efficiency at the normal viewing angle, the distance between the filter assembly corresponding to the first filter unit and the plane where the light-emitting element is located is greater than the distance between the filter assembly corresponding to the second filter unit and the plane where the light-emitting element is located, so as to increase the probability of refraction of the light emitted by the light-emitting element at a large viewing angle at the interface between the first filter unit and the light-transmitting convex part, and avoid the case that the light-emitting efficiency is different due to the refractive index difference between the first filter unit and the second filter unit. The above distance is a vertical distance.

[0117] In some embodiments, the light filtering unit further comprises a third light filtering unit, the third light filtering unit has the same refractive index as the second light filtering unit, so that the probability of the large viewing angle light emitted by the light emitting element being refracted at the interface between the second light filtering unit and the light-transmitting convex part is the same as the probability of the large viewing angle light emitted by the light emitting element being refracted at the interface between the third light filtering unit and the light-transmitting convex part, and therefore, the distance between the third light filtering unit and the plane where the light emitting element is located can be equal to the distance between the second light filtering unit and the plane where the light emitting element is located. The above-mentioned distance is a vertical distance.

[0118] In some embodiments, the light filtering unit further comprises a third light filtering unit, the third light filtering unit has a refractive index smaller than the refractive index of the second light filtering unit, the refractive index difference between the third light filtering unit and the light-transmitting convex part is larger, so that the large viewing angle light emitted by the light emitting element is more likely to be refracted at the interface between the third light filtering unit and the light-transmitting convex part, in order to balance the light emitting efficiency at the normal viewing angle, by setting the distance between the light filtering assembly corresponding to the third light filtering unit and the plane where the light emitting element is located to be smaller than the distance between the light filtering assembly corresponding to the second light filtering unit and the plane where the light emitting element is located, the probability of the large viewing angle light emitted by the light emitting element being refracted at the interface between the third light filtering unit and the light-transmitting convex part can be reduced, and the situation that the light emitting efficiency is different due to the refractive index difference between the second light filtering unit and the third light filtering unit can be avoided. The above-mentioned distance is a vertical distance.

[0119] In a specific embodiment eleven, as shown in FIG. 11, the display panel comprises a driving substrate 01, an anode 02 and a black pixel defining layer 04 located on the driving substrate 01, the driving substrate 01 comprises a substrate and a pixel circuit layer located on the substrate, the black pixel defining layer 04 defines a plurality of first openings, and a red light emitting layer 031, a green light emitting layer 032 and a blue light emitting layer 033 are formed in the first openings, the display panel further comprises a cathode 05 and an encapsulation layer 06 located on the side of the light emitting layer away from the driving substrate. In the direction away from the driving substrate, the encapsulation layer 06 sequentially comprises a planarization film layer 07, a planarization film layer 08, a planarization film layer 09 and a planarization film layer 10, the planarization film layer 07 and the planarization film layer 08 define a plurality of second openings, and a red light filtering unit 121, a green light filtering unit 122 and a blue light filtering unit 123 are formed in the second openings defined by the planarization film layer 07 and the planarization film layer 08, and the second openings defined by the planarization film layer 07 and the planarization film layer 08 correspond to the first openings one by one.

[0120] In the embodiment, the light-transmitting convex part 15 is formed in the second opening by the flat film layer 07 and the flat film layer 08, the refractive index of the flat film layer 07 and the flat film layer 08 can be greater than 1.75, the refractive index of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 is less than 1.7, the slope angle of the side surface of the light-transmitting convex part 15 can be 65-85°, and the thickness of the flat film layer 07 and the flat film layer 08 can be 1.5-2.5 microns. The orthographic projection of the light-transmitting convex part 15 on the driving substrate 01 covers the orthographic projection of the first opening on the driving substrate 01, the distance between the first boundary of the light-transmitting convex part 15 close to the boundary of the second opening and the boundary of the first opening is 0.5-2 microns, and the distance between the first boundary and the boundary of the second opening is 0.5-2 microns. The thickness of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 can be 2-4 microns, the red filter unit 121, the green filter unit 122 and the blue filter unit 123 completely cover the light-transmitting convex part 15, but do not cover the flat film layer 07 and the flat film layer 08 outside the second opening area. In the embodiment, the flat film layer 09 and the flat film layer 10 can be prepared by using transparent resin with a refractive index of 1.45-1.5.

[0121] The black matrix 11 is formed on the side of the flat film layer 09 away from the driving substrate 01, and the orthographic projection of the black matrix 11 on the substrate substrate is located in the orthographic projection of the black pixel defining layer 04 on the substrate substrate. The touch electrode 13 can also be formed on the side of the flat film layer 07 away from the driving substrate 01, so that the display panel integrates the touch function. In order not to affect the display, the orthographic projection of the touch electrode 13 on the substrate substrate is located in the orthographic projection of the black matrix 11 on the substrate substrate. The touch electrode bridge 14 can also be formed on the side of the flat film layer 08 away from the driving substrate 01. In order not to affect the display, the orthographic projection of the touch electrode bridge 14 on the substrate substrate is located in the orthographic projection of the black matrix 11 on the substrate substrate.

[0122] In the embodiment, the cross section of the light-transmitting convex part 15 in the direction perpendicular to the substrate substrate is a right trapezoid, and the refractive index of the light-transmitting convex part 15 is greater than the refractive index of the filter unit. Therefore, the light emitted by the light-emitting element at the oblique viewing angle will be refracted on the side surface of the light-transmitting convex part 15 and deviated to the direction close to the normal viewing angle, so as to improve the light-emitting efficiency at the normal viewing angle.

[0123] In the embodiment, the red filter unit 121 has a refractive index greater than the refractive indexes of the green filter unit 122 and the blue filter unit 123, the refractive index of the red filter unit 121 can be close to 1.7, and the refractive indexes of the green filter unit 122 and the blue filter unit 123 are about 1.6. In this way, the refractive index difference between the red filter unit 121 and the light-transmitting convex part 15 is smaller, and the distance between the red filter unit 121 and the light-emitting element is greater than the distances between the green filter unit 122, the blue filter unit 123 and the light-emitting element, so as to improve the probability of the large-viewing-angle light emitted by the light-emitting element being refracted at the interface between the red filter unit 121 and the light-transmitting convex part 15, balance the refractive index difference, adjust the light-emitting efficiency of the light of different colors in the normal viewing angle, and improve the uniformity of the light emitted by the display device.

[0124] In the embodiment, when the display panel is prepared, the preparation sequence of the film layers is as follows: the flat film layer 07, the green filter unit 122, the blue filter unit 123, the touch electrode 13, the flat film layer 08, the red filter unit 121, the touch electrode bridge 14, the flat film layer 09, the black matrix 11, and the flat film layer 10. In the embodiment, the flat film layer 09 and the flat film layer 10 do not form the second opening.

[0125] In the twelfth embodiment, as shown in FIG. 12, the display panel includes a driving substrate 01, an anode 02 and a black pixel defining layer 04 located on the driving substrate 01, the driving substrate 01 includes a substrate and a pixel circuit layer located on the substrate, the black pixel defining layer 04 defines a plurality of first openings, and a red light-emitting layer 031, a green light-emitting layer 032 and a blue light-emitting layer 033 are formed in the first openings. The display panel further includes a cathode 05 and an encapsulation layer 06 located on the side of the light-emitting layer away from the driving substrate. In the direction away from the driving substrate, the flat film layer 07, the flat film layer 08, the flat film layer 09 and the flat film layer 10 are sequentially formed on the encapsulation layer 06, the flat film layer 09 and the flat film layer 08 define a plurality of second openings, the red filter unit 121, the green filter unit 122 and the blue filter unit 123 are formed in the second openings defined by the flat film layer 09 and the flat film layer 08, and the second openings defined by the flat film layer 09 and the flat film layer 08 correspond to the first openings one by one.

[0126] In the embodiment, the light-transmitting convex part 15 is formed in the second opening by the flat film layer 09 and the flat film layer 08, the refractive index of the flat film layer 09 and the flat film layer 08 can be greater than 1.75, the refractive index of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 is less than 1.7, the slope angle of the side surface of the light-transmitting convex part 15 can be 65-85°, and the thickness of the flat film layer 09 and the flat film layer 08 can be 1.5-2.5 microns. The orthographic projection of the light-transmitting convex part 15 on the driving substrate 01 covers the orthographic projection of the first opening on the driving substrate 01, the distance between the first boundary of the light-transmitting convex part 15 close to the boundary of the second opening and the boundary of the first opening is 0.5-2 microns, and the distance between the first boundary and the boundary of the second opening is 0.5-2 microns. The thickness of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 can be 2-4 microns, the red filter unit 121, the green filter unit 122 and the blue filter unit 123 completely cover the light-transmitting convex part 15, but do not cover the flat film layer 09 and the flat film layer 08 outside the second opening area. In the embodiment, the flat film layer 07 and the flat film layer 10 can be prepared by using transparent resin with a refractive index of 1.45-1.5.

[0127] The black matrix 11 is formed on the side of the flat film layer 09 away from the driving substrate 01, and the orthographic projection of the black matrix 11 on the substrate substrate is located in the orthographic projection of the black pixel defining layer 04 on the substrate substrate. The touch electrode 13 can also be formed on the side of the flat film layer 07 away from the driving substrate 01, so that the display panel integrates the touch function. In order not to affect the display, the orthographic projection of the touch electrode 13 on the substrate substrate is located in the orthographic projection of the black matrix 11 on the substrate substrate. The touch electrode bridge 14 can also be formed on the side of the flat film layer 08 away from the driving substrate 01. In order not to affect the display, the orthographic projection of the touch electrode bridge 14 on the substrate substrate is located in the orthographic projection of the black matrix 11 on the substrate substrate.

[0128] In the embodiment, the cross section of the light-transmitting convex part 15 in the direction perpendicular to the substrate substrate is a right trapezoid, and the refractive index of the light-transmitting convex part 15 is greater than the refractive index of the filter unit. In this way, the light emitted by the light-emitting element at the oblique viewing angle will be refracted on the side surface of the light-transmitting convex part 15 and be deflected to the direction close to the normal viewing angle, thereby improving the light-emitting efficiency at the normal viewing angle.

[0129] In the embodiment, the red filter unit 121 has a refractive index greater than the refractive indexes of the green filter unit 122 and the blue filter unit 123, the refractive index of the red filter unit 121 can be close to 1.7, and the refractive indexes of the green filter unit 122 and the blue filter unit 123 are about 1.6. In this way, the refractive index difference between the red filter unit 121 and the light-transmitting convex part 15 is smaller, and the distance between the red filter unit 121 and the light-emitting element is greater than the distances between the green filter unit 122, the blue filter unit 123 and the light-emitting element, so as to improve the probability of the light-emitting element emitting a large viewing angle light at the interface between the red filter unit 121 and the light-transmitting convex part 15, balance the refractive index difference, adjust the light-emitting efficiency of the normal viewing angle of light of different colors, and improve the uniformity of the display device.

[0130] In the embodiment, when the display panel is prepared, the preparation sequence of each film layer is: the flat film layer 07, the touch electrode 13, the flat film layer 08, the green filter unit 122, the blue filter unit 123, the touch electrode bridge 14, the flat film layer 09, the red filter unit 121, the black matrix 11 and the flat film layer 10. In the embodiment, the flat film layer 07 and the flat film layer 10 do not form the second opening.

[0131] In the thirteenth embodiment, as shown in FIG. 13, the display panel includes a driving substrate 01, an anode 02 and a black pixel defining layer 04 on the driving substrate 01, the driving substrate 01 includes a substrate and a pixel circuit layer on the substrate, the black pixel defining layer 04 defines a plurality of first openings, and a red light-emitting layer 031, a green light-emitting layer 032 and a blue light-emitting layer 033 are formed in the first openings. The display panel further includes a cathode 05 and an encapsulation layer 06 on a side of the light-emitting layer away from the driving substrate. In the direction away from the driving substrate, the flat film layer 07, the flat film layer 08, the flat film layer 09 and the flat film layer 10 are sequentially formed on the encapsulation layer 06, the flat film layer 09 and the flat film layer 07 define a plurality of second openings, the red filter unit 121, the green filter unit 122 and the blue filter unit 123 are formed in the second openings defined by the flat film layer 09 and the flat film layer 07, and the second openings defined by the flat film layer 09 and the flat film layer 07 correspond to the first openings one by one.

[0132] In the embodiment, the light-transmitting convex part 15 is formed in the second opening by the planar film layer 09 and the planar film layer 07, the refractive index of the planar film layer 09 and the planar film layer 07 can be greater than 1.75, the refractive index of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 is less than 1.7, the slope angle of the side surface of the light-transmitting convex part 15 can be 65-85°, and the thickness of the planar film layer 09 and the planar film layer 07 can be 1.5-2.5 microns. The orthographic projection of the light-transmitting convex part 15 on the driving substrate 01 covers the orthographic projection of the first opening on the driving substrate 01, the distance between the first boundary of the light-transmitting convex part 15 close to the boundary of the second opening and the boundary of the first opening is 0.5-2 microns, and the distance between the first boundary and the boundary of the second opening is 0.5-2 microns. The thickness of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 can be 2-4 microns, the red filter unit 121, the green filter unit 122 and the blue filter unit 123 completely cover the light-transmitting convex part 15, but do not cover the planar film layer 09 and the planar film layer 08 outside the second opening area. In the embodiment, the planar film layer 08 and the planar film layer 10 can be prepared by using transparent resin with a refractive index of 1.45-1.5.

[0133] The black matrix 11 is formed on the side of the planar film layer 09 away from the driving substrate 01, and the orthographic projection of the black matrix 11 on the substrate substrate is located within the orthographic projection of the black pixel defining layer 04 on the substrate substrate. The touch electrode 13 can also be formed on the side of the planar film layer 07 away from the driving substrate 01, so that the display panel integrates the touch function. In order not to affect the display, the orthographic projection of the touch electrode 13 on the substrate substrate is located within the orthographic projection of the black matrix 11 on the substrate substrate. The touch electrode bridge 14 can also be formed on the side of the planar film layer 08 away from the driving substrate 01. In order not to affect the display, the orthographic projection of the touch electrode bridge 14 on the substrate substrate is located within the orthographic projection of the black matrix 11 on the substrate substrate.

[0134] In the embodiment, the cross section of the light-transmitting convex part 15 in the direction perpendicular to the substrate substrate is a right trapezoid, and the refractive index of the light-transmitting convex part 15 is greater than the refractive index of the filter unit. In this way, the light emitted by the light-emitting element at the oblique viewing angle and exiting the light-transmitting convex part 15 will be refracted on the side surface of the light-transmitting convex part 15, and be deflected to the direction close to the normal viewing angle, thereby improving the light-emitting efficiency at the normal viewing angle.

[0135] In the embodiment, the red filter unit 121 has a refractive index greater than the refractive indexes of the green filter unit 122 and the blue filter unit 123, the refractive index of the red filter unit 121 can be close to 1.7, and the refractive indexes of the green filter unit 122 and the blue filter unit 123 are about 1.6. In this way, the refractive index difference between the red filter unit 121 and the light-transmitting convex part 15 is smaller, and the distance between the red filter unit 121 and the light-emitting element is greater than the distances between the green filter unit 122, the blue filter unit 123 and the light-emitting element, so as to improve the probability of the light-emitting element emitting a large viewing angle light at the interface between the red filter unit 121 and the light-transmitting convex part 15, balance the difference in refractive index, adjust the light-emitting efficiency of the normal viewing angle of light of different colors, and improve the uniformity of light emission of the display device.

[0136] In the embodiment, when the display panel is prepared, the preparation sequence of each film layer is: the flat film layer 07, the green filter unit 122, the blue filter unit 123, the touch electrode 13, the flat film layer 08, the touch electrode bridge 14, the flat film layer 09, the red filter unit 121, the black matrix 11 and the flat film layer 10. In the embodiment, the flat film layer 08 and the flat film layer 10 do not form the second opening.

[0137] In the fourteenth embodiment, as shown in FIG. 14, the display panel includes a driving substrate 01, an anode 02 and a black pixel defining layer 04 located on the driving substrate 01, the driving substrate 01 includes a substrate and a pixel circuit layer located on the substrate, the black pixel defining layer 04 defines a plurality of first openings, and a red light-emitting layer 031, a green light-emitting layer 032 and a blue light-emitting layer 033 are formed in the first openings. The display panel further includes a cathode 05 and an encapsulation layer 06 located on the side of the light-emitting layer away from the driving substrate. In the direction away from the driving substrate, the flat film layer 07, the flat film layer 08, the flat film layer 09 and the flat film layer 10 are sequentially formed on the encapsulation layer 06, the flat film layer 09, the flat film layer 08 and the flat film layer 07 define a plurality of second openings, the red filter unit 121 is formed in the second opening defined by the flat film layer 09, the green filter unit 122 is formed in the second opening defined by the flat film layer 08, and the blue filter unit 123 is formed in the second opening defined by the flat film layer 07. The second openings correspond to the first openings one by one.

[0138] In the embodiment, the light-transmitting convex part 15 is formed in the second opening by the flat film layer 09, the flat film layer 08 and the flat film layer 07, the refractive index of the flat film layer 09, the flat film layer 08 and the flat film layer 07 can be greater than 1.75, the refractive index of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 is less than 1.7, the slope angle of the side surface of the light-transmitting convex part 15 can be 65-85°, and the thickness of the flat film layer 09, the flat film layer 08 and the flat film layer 07 can be 1.5-2.5 microns. The orthographic projection of the light-transmitting convex part 15 on the driving substrate 01 covers the orthographic projection of the first opening on the driving substrate 01, the distance between the first boundary of the light-transmitting convex part 15 close to the boundary of the second opening and the boundary of the first opening is 0.5-2 microns, and the distance between the first boundary and the boundary of the second opening is 0.5-2 microns. The thickness of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 can be 2-4 microns, and the red filter unit 121, the green filter unit 122 and the blue filter unit 123 completely cover the light-transmitting convex part 15 but do not cover the flat film layer 09, the flat film layer 08 and the flat film layer 08 outside the second opening area. In the embodiment, the flat film layer 10 can be prepared by using a transparent resin with a refractive index of 1.45-1.5.

[0139] The black matrix 11 is formed on the side of the flat film layer 09 away from the driving substrate 01, and the orthographic projection of the black matrix 11 on the substrate substrate is located in the orthographic projection of the black pixel defining layer 04 on the substrate substrate. The touch electrode 13 can also be formed on the side of the flat film layer 07 away from the driving substrate 01, so that the display panel integrates the touch function. In order not to affect the display, the orthographic projection of the touch electrode 13 on the substrate substrate is located in the orthographic projection of the black matrix 11 on the substrate substrate. The touch electrode bridge 14 can also be formed on the side of the flat film layer 08 away from the driving substrate 01. In order not to affect the display, the orthographic projection of the touch electrode bridge 14 on the substrate substrate is located in the orthographic projection of the black matrix 11 on the substrate substrate.

[0140] In the embodiment, the cross section of the light-transmitting convex part 15 in the direction perpendicular to the substrate substrate is a right trapezoid, and the refractive index of the light-transmitting convex part 15 is greater than the refractive index of the filter unit. In this way, the light emitted by the light-emitting element at the oblique viewing angle and entering the light-transmitting convex part 15 will be refracted on the side surface of the light-transmitting convex part 15 and deviated to the direction close to the normal viewing angle, thereby improving the light-emitting efficiency at the normal viewing angle.

[0141] In this embodiment, the refractive index of the red filter unit 121 is greater than the refractive index of the green filter unit 122, and the refractive index of the green filter unit 122 is greater than the refractive index of the blue filter unit 123. In order to avoid the case that the light-emitting efficiency is different due to the difference in refractive index, the distance between the red filter unit 121 and the light-emitting element is greater than the distance between the green filter unit 122 and the light-emitting element, and the distance between the green filter unit 122 and the light-emitting element is greater than the distance between the blue filter unit 123 and the light-emitting element. In this way, the probability of the light-emitting element emitting a large viewing angle light at the interface between the red filter unit 121 and the light-transmitting convex portion 15 can be improved, thereby balancing the difference in refractive index, adjusting the light-emitting efficiency of the normal viewing angle of light of different colors, and improving the uniformity of the display device.

[0142] In this embodiment, when the display panel is prepared, the preparation sequence of each film layer is: the flat film layer 07, the blue filter unit 123, the touch electrode 13, the flat film layer 08, the green filter unit 122, the touch electrode bridge 14, the flat film layer 09, the red filter unit 121, the black matrix 11, and the flat film layer 10. In this embodiment, the flat film layer 10 does not form a second opening.

[0143] In a fifteenth specific embodiment, as shown in FIG. 15, the display panel includes a driving substrate 01, an anode 02 and a black pixel defining layer 04 located on the driving substrate 01, the driving substrate 01 including a substrate and a pixel circuit layer located on the substrate, and the black pixel defining layer 04 defining a plurality of first openings, a red light-emitting layer 031, a green light-emitting layer 032 and a blue light-emitting layer 033 being formed in the first openings. The display panel further includes a cathode 05 and an encapsulation layer 06 located on a side of the light-emitting layer away from the driving substrate. In a direction away from the driving substrate, the flat film layer 07, the flat film layer 08, the flat film layer 09 and the flat film layer 10 are sequentially formed on the encapsulation layer 06, the flat film layer 08 and the flat film layer 07 defining a plurality of second openings, the red filter unit 121 being formed in the second openings defined by the flat film layer 07, and the green filter unit 122 and the blue filter unit 123 being formed in the second openings defined by the flat film layer 08, the second openings corresponding to the first openings one by one.

[0144] In the embodiment, the light-transmitting convex part 15 is formed in the second opening by the planar film layer 08 and the planar film layer 07, the refractive index of the planar film layer 08 and the planar film layer 07 can be greater than 1.75, the refractive index of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 is less than 1.7, the slope angle of the side surface of the light-transmitting convex part 15 can be 65-85°, and the thickness of the planar film layer 08 and the planar film layer 07 can be 1.5-2.5 microns. The orthographic projection of the light-transmitting convex part 15 on the driving substrate 01 covers the orthographic projection of the first opening on the driving substrate 01, the distance between the first boundary of the light-transmitting convex part 15 close to the boundary of the second opening and the boundary of the first opening is 0.5-2 microns, and the distance between the first boundary and the boundary of the second opening is 0.5-2 microns. The thickness of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 can be 2-4 microns, the red filter unit 121, the green filter unit 122 and the blue filter unit 123 completely cover the light-transmitting convex part 15, but do not cover the planar film layer 08 and the planar film layer 07 outside the second opening area. In the embodiment, the planar film layer 09 and the planar film layer 10 can be prepared by using transparent resin with a refractive index of 1.45-1.5.

[0145] The black matrix 11 is formed on the side of the planar film layer 09 away from the driving substrate 01, and the orthographic projection of the black matrix 11 on the substrate substrate is located in the orthographic projection of the black pixel defining layer 04 on the substrate substrate. The touch electrode 13 can also be formed on the side of the planar film layer 07 away from the driving substrate 01, so that the display panel integrates the touch function. In order not to affect the display, the orthographic projection of the touch electrode 13 on the substrate substrate is located in the orthographic projection of the black matrix 11 on the substrate substrate. The touch electrode bridge 14 can also be formed on the side of the planar film layer 08 away from the driving substrate 01. In order not to affect the display, the orthographic projection of the touch electrode bridge 14 on the substrate substrate is located in the orthographic projection of the black matrix 11 on the substrate substrate.

[0146] In the embodiment, the cross section of the light-transmitting convex part 15 in the direction perpendicular to the substrate substrate is a right trapezoid, and the refractive index of the light-transmitting convex part 15 is greater than the refractive index of the filter unit. In this way, the light emitted by the light-emitting element at the oblique viewing angle will be refracted on the side surface of the light-transmitting convex part 15 and deviated to the direction close to the normal viewing angle, so as to improve the light-emitting efficiency at the normal viewing angle.

[0147] In the embodiment, the refractive index of the red filter unit 121 is less than the refractive index of the green filter unit 122, the refractive index of the green filter unit 122 is equal to the refractive index of the blue filter unit 123, in order to avoid the case that the light-emitting efficiency is different due to the difference in refractive index, the distance between the red filter unit 121 and the light-emitting element is less than the distance between the green filter unit 122 and the light-emitting element, and the distance between the green filter unit 122 and the light-emitting element is equal to the distance between the blue filter unit 123 and the light-emitting element, so that the probability of the large viewing angle light emitted by the light-emitting element being refracted at the interface between the green filter unit 122 and the light-transmitting convex part 15 and the interface between the blue filter unit 123 and the light-transmitting convex part 15 is increased, thereby balancing the difference in refractive index, adjusting the light-emitting efficiency of the light of different colors in the normal viewing angle, and improving the uniformity of the light emitted by the display device.

[0148] In the embodiment, when the display panel is prepared, the preparation sequence of each film layer is: the flat film layer 07, the red filter unit 121, the touch electrode 13, the flat film layer 08, the green filter unit 122, the blue filter unit 123, the touch electrode bridge 14, the flat film layer 09, the black matrix 11, and the flat film layer 10. In the embodiment, the flat film layer 09 and the flat film layer 10 do not form the second opening.

[0149] In the sixteenth embodiment, as shown in FIG. 16, the display panel includes a driving substrate 01, an anode 02 and a black pixel defining layer 04 located on the driving substrate 01, the driving substrate 01 includes a substrate and a pixel circuit layer located on the substrate, the black pixel defining layer 04 defines a plurality of first openings, and a red light-emitting layer 031, a green light-emitting layer 032, and a blue light-emitting layer 033 are formed in the first openings. The display panel further includes a cathode 05 and an encapsulation layer 06 located on the side of the light-emitting layer away from the driving substrate. In the direction away from the driving substrate, the flat film layer 07, the flat film layer 08, the flat film layer 09, and the flat film layer 10 are sequentially formed on the encapsulation layer 06, the flat film layer 09 and the flat film layer 07 define a plurality of second openings, the red filter unit 121 is formed in the second opening defined by the flat film layer 07, the green filter unit 122 and the blue filter unit 123 are formed in the second opening defined by the flat film layer 09, and the second opening corresponds to the first opening one by one.

[0150] In the embodiment, the light-transmitting convex part 15 is formed in the second opening by the planar film layer 09 and the planar film layer 07, the refractive index of the planar film layer 09 and the planar film layer 07 can be greater than 1.75, the refractive index of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 is less than 1.7, the slope angle of the side surface of the light-transmitting convex part 15 can be 65-85°, and the thickness of the planar film layer 09 and the planar film layer 07 can be 1.5-2.5 microns. The orthographic projection of the light-transmitting convex part 15 on the driving substrate 01 covers the orthographic projection of the first opening on the driving substrate 01, the distance between the first boundary of the light-transmitting convex part 15 close to the boundary of the second opening and the boundary of the first opening is 0.5-2 microns, and the distance between the first boundary and the boundary of the second opening is 0.5-2 microns. The thickness of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 can be 2-4 microns, the red filter unit 121, the green filter unit 122 and the blue filter unit 123 completely cover the light-transmitting convex part 15, but do not cover the planar film layer 09 and the planar film layer 07 outside the second opening area. In the embodiment, the planar film layer 08 and the planar film layer 10 can be prepared by using transparent resin with a refractive index of 1.45-1.5.

[0151] The black matrix 11 is formed on the side of the planar film layer 09 away from the driving substrate 01, and the orthographic projection of the black matrix 11 on the substrate substrate is located within the orthographic projection of the black pixel defining layer 04 on the substrate substrate. The touch electrode 13 can also be formed on the side of the planar film layer 07 away from the driving substrate 01, so that the display panel integrates the touch function. In order not to affect the display, the orthographic projection of the touch electrode 13 on the substrate substrate is located within the orthographic projection of the black matrix 11 on the substrate substrate. The touch electrode bridge 14 can also be formed on the side of the planar film layer 08 away from the driving substrate 01. In order not to affect the display, the orthographic projection of the touch electrode bridge 14 on the substrate substrate is located within the orthographic projection of the black matrix 11 on the substrate substrate.

[0152] In the embodiment, the cross section of the light-transmitting convex part 15 in the direction perpendicular to the substrate substrate is a right trapezoid, and the refractive index of the light-transmitting convex part 15 is greater than the refractive index of the filter unit. In this way, the light emitted by the light-emitting element at the oblique viewing angle and exiting the light-transmitting convex part 15 will be refracted on the side surface of the light-transmitting convex part 15, and be deflected to the direction close to the normal viewing angle, thereby improving the light-emitting efficiency at the normal viewing angle.

[0153] In this embodiment, the refractive index of the red filter unit 121 is less than the refractive index of the green filter unit 122, and the refractive index of the green filter unit 122 is equal to the refractive index of the blue filter unit 123. In order to avoid the case that the light-emitting efficiency is different due to the difference in refractive index, the distance between the red filter unit 121 and the light-emitting element is less than the distance between the green filter unit 122 and the light-emitting element, and the distance between the green filter unit 122 and the light-emitting element is equal to the distance between the blue filter unit 123 and the light-emitting element. In this way, the probability of the large viewing angle light emitted by the light-emitting element being refracted at the interface between the green filter unit 122 and the light-transmitting convex part 15 and the interface between the blue filter unit 123 and the light-transmitting convex part 15 can be improved, thereby balancing the difference in refractive index, adjusting the light-emitting efficiency of the light of different colors in the normal viewing angle, and improving the uniformity of the light emitted by the display device.

[0154] In this embodiment, when the display panel is prepared, the preparation sequence of each film layer is: the flat film layer 07, the red filter unit 121, the touch electrode 13, the flat film layer 08, the touch electrode bridge 14, the flat film layer 09, the green filter unit 122, the blue filter unit 123, the black matrix 11, and the flat film layer 10. In this embodiment, the flat film layer 08 and the flat film layer 10 do not form the second opening.

[0155] In Embodiment Seventeen, as shown in FIG. 17, the display panel includes a driving substrate 01, an anode 02 and a black pixel defining layer 04 located on the driving substrate 01, the driving substrate 01 includes a substrate and a pixel circuit layer located on the substrate, the black pixel defining layer 04 defines a plurality of first openings, and a red light-emitting layer 031, a green light-emitting layer 032, and a blue light-emitting layer 033 are formed in the first openings. The display panel further includes a cathode 05 and an encapsulation layer 06 located on the side of the light-emitting layer away from the driving substrate. In the direction away from the driving substrate, the flat film layer 07, the flat film layer 08, the flat film layer 09, and the flat film layer 10 are sequentially formed on the encapsulation layer 06, the flat film layer 09, the flat film layer 08, and the flat film layer 07 define a plurality of second openings, the blue filter unit 123 is formed in the second opening defined by the flat film layer 09, the green filter unit 122 is formed in the second opening defined by the flat film layer 08, and the red filter unit 121 is formed in the second opening defined by the flat film layer 07, and the second openings correspond one-to-one to the first openings.

[0156] In the embodiment, the light-transmitting convex part 15 is formed in the second opening by the flat film layer 09, the flat film layer 08 and the flat film layer 07, the refractive index of the flat film layer 09, the flat film layer 08 and the flat film layer 07 can be greater than 1.75, the refractive index of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 is less than 1.7, the slope angle of the side surface of the light-transmitting convex part 15 can be 65-85°, and the thickness of the flat film layer 09, the flat film layer 08 and the flat film layer 07 can be 1.5-2.5 microns. The orthographic projection of the light-transmitting convex part 15 on the driving substrate 01 covers the orthographic projection of the first opening on the driving substrate 01, the distance between the first boundary of the light-transmitting convex part 15 close to the boundary of the second opening and the boundary of the first opening is 0.5-2 microns, and the distance between the first boundary and the boundary of the second opening is 0.5-2 microns. The thickness of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 can be 2-4 microns, and the red filter unit 121, the green filter unit 122 and the blue filter unit 123 completely cover the light-transmitting convex part 15 but do not cover the flat film layer 09, the flat film layer 08 and the flat film layer 08 outside the second opening area. In the embodiment, the flat film layer 10 can be prepared by using a transparent resin with a refractive index of 1.45-1.5.

[0157] The black matrix 11 is formed on the side of the flat film layer 09 away from the driving substrate 01, and the orthographic projection of the black matrix 11 on the substrate substrate is located in the orthographic projection of the black pixel defining layer 04 on the substrate substrate. The touch electrode 13 can also be formed on the side of the flat film layer 07 away from the driving substrate 01, so that the display panel integrates the touch function. In order not to affect the display, the orthographic projection of the touch electrode 13 on the substrate substrate is located in the orthographic projection of the black matrix 11 on the substrate substrate. The touch electrode bridge 14 can also be formed on the side of the flat film layer 08 away from the driving substrate 01. In order not to affect the display, the orthographic projection of the touch electrode bridge 14 on the substrate substrate is located in the orthographic projection of the black matrix 11 on the substrate substrate.

[0158] In the embodiment, the cross section of the light-transmitting convex part 15 in the direction perpendicular to the substrate substrate is a right trapezoid, and the refractive index of the light-transmitting convex part 15 is greater than the refractive index of the filter unit. In this way, the light emitted by the light-emitting element at the oblique viewing angle and entering the light-transmitting convex part 15 will be refracted on the side surface of the light-transmitting convex part 15 and deviated to the direction close to the normal viewing angle, thereby improving the light-emitting efficiency at the normal viewing angle.

[0159] In the embodiment, the refractive index of the red filter unit 121 is less than the refractive index of the green filter unit 122, and the refractive index of the green filter unit 122 is less than the refractive index of the blue filter unit 123. In order to avoid the case that the light-emitting efficiency is different due to the difference in refractive index, the distance between the red filter unit 121 and the light-emitting element is less than the distance between the green filter unit 122 and the light-emitting element, and the distance between the green filter unit 122 and the light-emitting element is less than the distance between the blue filter unit 123 and the light-emitting element. In this way, the probability of the light-emitting element emitting a large viewing angle light at the interface between the blue filter unit 123 and the light-transmitting convex part 15 can be improved, the difference in refractive index can be balanced, the light-emitting efficiency of the normal viewing angle of light of different colors can be adjusted, and the uniformity of the display device can be improved.

[0160] In the embodiment, when the display panel is prepared, the preparation sequence of each film layer is: the flat film layer 07, the red filter unit 121, the touch electrode 13, the flat film layer 08, the green filter unit 122, the touch electrode bridge 14, the flat film layer 09, the blue filter unit 123, the black matrix 11, and the flat film layer 10. In the embodiment, the flat film layer 10 does not form a second opening.

[0161] In the eighteenth embodiment, as shown in FIG. 18, the display panel includes a driving substrate 01, an anode 02 and a black pixel defining layer 04 located on the driving substrate 01, the driving substrate 01 includes a substrate and a pixel circuit layer located on the substrate, the black pixel defining layer 04 defines a plurality of first openings, and a red light-emitting layer 031, a green light-emitting layer 032, and a blue light-emitting layer 033 are formed in the first openings. The display panel further includes a cathode 05 and an encapsulation layer 06 located on the side of the light-emitting layer away from the driving substrate. In the direction away from the driving substrate, the flat film layer 07, the flat film layer 08, the flat film layer 09, and the flat film layer 10 are sequentially formed on the encapsulation layer 06, the flat film layer 08 and the flat film layer 07 define a plurality of second openings, the red filter unit 121 and the blue filter unit 123 are formed in the second openings defined by the flat film layer 07, and the green filter unit 122 is formed in the second openings defined by the flat film layer 08. The second openings correspond to the first openings one by one.

[0162] In this embodiment, the light-transmitting convex part 15 is formed in the second opening by the flat film layer 08 and the flat film layer 07, the refractive index of the flat film layer 08 and the flat film layer 07 can be greater than 1.75, the refractive index of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 is less than 1.7, the slope angle of the side surface of the light-transmitting convex part 15 can be 65-85°, and the thickness of the flat film layer 08 and the flat film layer 07 can be 1.5-2.5 microns. The orthographic projection of the light-transmitting convex part 15 on the driving substrate 01 covers the orthographic projection of the first opening on the driving substrate 01, the distance between the first boundary of the light-transmitting convex part 15 close to the boundary of the second opening and the boundary of the first opening is 0.5-2 microns, and the distance between the first boundary and the boundary of the second opening is 0.5-2 microns. The thickness of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 can be 2-4 microns, the red filter unit 121, the green filter unit 122 and the blue filter unit 123 completely cover the light-transmitting convex part 15, but do not cover the flat film layer 08 and the flat film layer 07 outside the second opening area. In this embodiment, the flat film layer 09 and the flat film layer 10 can be prepared by using transparent resin with a refractive index of 1.45-1.5.

[0163] The black matrix 11 is formed on the side of the flat film layer 09 away from the driving substrate 01, and the orthographic projection of the black matrix 11 on the substrate substrate is located within the orthographic projection of the black pixel defining layer 04 on the substrate substrate. The touch electrode 13 can also be formed on the side of the flat film layer 07 away from the driving substrate 01, so that the display panel integrates the touch function. In order not to affect the display, the orthographic projection of the touch electrode 13 on the substrate substrate is located within the orthographic projection of the black matrix 11 on the substrate substrate. The touch electrode bridge 14 can also be formed on the side of the flat film layer 08 away from the driving substrate 01. In order not to affect the display, the orthographic projection of the touch electrode bridge 14 on the substrate substrate is located within the orthographic projection of the black matrix 11 on the substrate substrate.

[0164] In this embodiment, the cross section of the light-transmitting convex part 15 in the direction perpendicular to the substrate substrate is a right trapezoid, and the refractive index of the light-transmitting convex part 15 is greater than the refractive index of the filter unit. In this way, the light ray emitted by the light-emitting element at the oblique viewing angle will be refracted on the side surface of the light-transmitting convex part 15 and be deflected to the direction close to the normal viewing angle, thereby improving the light-emitting efficiency at the normal viewing angle.

[0165] In the embodiment, the refractive index of the red filter unit 121 is less than the refractive index of the green filter unit 122, and the refractive index of the red filter unit 121 is equal to the refractive index of the blue filter unit 123. In order to avoid the case that the light-emitting efficiency is different due to the difference in refractive index, the distance between the red filter unit 121 and the light-emitting element is less than the distance between the green filter unit 122 and the light-emitting element, and the distance between the red filter unit 121 and the light-emitting element is equal to the distance between the blue filter unit 123 and the light-emitting element. In this way, the probability of the light-emitting element emitting a large viewing angle light ray at the interface between the green filter unit 122 and the light-transmitting convex part 15 can be improved, the difference in refractive index can be balanced, the light-emitting efficiency of the normal viewing angle of light of different colors can be adjusted, and the uniformity of the display device light emission can be improved.

[0166] In the embodiment, when the display panel is prepared, the preparation sequence of each film layer is: the flat film layer 07, the red filter unit 121, the blue filter unit 123, the touch electrode 13, the flat film layer 08, the green filter unit 122, the touch electrode bridge 14, the flat film layer 09, the black matrix 11, and the flat film layer 10. In the embodiment, the flat film layer 09 and the flat film layer 10 do not form the second opening.

[0167] In the nineteenth embodiment, as shown in FIG. 19, the display panel includes a driving substrate 01, an anode 02 and a black pixel defining layer 04 located on the driving substrate 01, the driving substrate 01 includes a substrate and a pixel circuit layer located on the substrate, the black pixel defining layer 04 defines a plurality of first openings, and a red light-emitting layer 031, a green light-emitting layer 032, and a blue light-emitting layer 033 are formed in the first openings. The display panel further includes a cathode 05 and an encapsulation layer 06 located on the side of the light-emitting layer away from the driving substrate. In the direction away from the driving substrate, the flat film layer 07, the flat film layer 08, the flat film layer 09, and the flat film layer 10 are sequentially formed on the encapsulation layer 06, the flat film layer 09 and the flat film layer 07 define a plurality of second openings, the red filter unit 121 and the blue filter unit 123 are formed in the second openings defined by the flat film layer 07, the green filter unit 122 is formed in the second openings defined by the flat film layer 09, and the second openings correspond one by one to the first openings.

[0168] In the embodiment, the light-transmitting convex part 15 is formed in the second opening by the planar film layer 09 and the planar film layer 07, the refractive index of the planar film layer 09 and the planar film layer 07 can be greater than 1.75, the refractive index of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 is less than 1.7, the slope angle of the side surface of the light-transmitting convex part 15 can be 65-85°, and the thickness of the planar film layer 09 and the planar film layer 07 can be 1.5-2.5 microns. The orthographic projection of the light-transmitting convex part 15 on the driving substrate 01 covers the orthographic projection of the first opening on the driving substrate 01, the distance between the first boundary of the light-transmitting convex part 15 close to the boundary of the second opening and the boundary of the first opening is 0.5-2 microns, and the distance between the first boundary and the boundary of the second opening is 0.5-2 microns. The thickness of the red filter unit 121, the green filter unit 122 and the blue filter unit 123 can be 2-4 microns, the red filter unit 121, the green filter unit 122 and the blue filter unit 123 completely cover the light-transmitting convex part 15, but do not cover the planar film layer 09 and the planar film layer 07 outside the second opening area. In the embodiment, the planar film layer 08 and the planar film layer 10 can be prepared by using transparent resin with a refractive index of 1.45-1.5.

[0169] The black matrix 11 is formed on the side of the planar film layer 09 away from the driving substrate 01, and the orthographic projection of the black matrix 11 on the substrate substrate is located within the orthographic projection of the black pixel defining layer 04 on the substrate substrate. The touch electrode 13 can also be formed on the side of the planar film layer 07 away from the driving substrate 01, so that the display panel integrates the touch function. In order not to affect the display, the orthographic projection of the touch electrode 13 on the substrate substrate is located within the orthographic projection of the black matrix 11 on the substrate substrate. The touch electrode bridge 14 can also be formed on the side of the planar film layer 08 away from the driving substrate 01. In order not to affect the display, the orthographic projection of the touch electrode bridge 14 on the substrate substrate is located within the orthographic projection of the black matrix 11 on the substrate substrate.

[0170] In the embodiment, the cross section of the light-transmitting convex part 15 in the direction perpendicular to the substrate substrate is a right trapezoid, and the refractive index of the light-transmitting convex part 15 is greater than the refractive index of the filter unit. In this way, the light emitted by the light-emitting element at the oblique viewing angle will be refracted on the side surface of the light-transmitting convex part 15 and be deflected to the direction close to the normal viewing angle, thereby improving the light-emitting efficiency at the normal viewing angle.

[0171] In this embodiment, the refractive index of the red filter unit 121 is less than the refractive index of the green filter unit 122, and the refractive index of the red filter unit 121 is equal to the refractive index of the blue filter unit 123. In order to avoid the case that the light-emitting efficiency is different due to the difference in refractive index, the distance between the red filter unit 121 and the light-emitting element is less than the distance between the green filter unit 122 and the light-emitting element, and the distance between the red filter unit 121 and the light-emitting element is equal to the distance between the blue filter unit 123 and the light-emitting element. In this way, the probability of the light-emitting element emitting a large-angle light ray being refracted at the interface between the green filter unit 122 and the light-transmitting convex portion 15 can be improved, thereby balancing the difference in refractive index, adjusting the light-emitting efficiency of the normal angle of light of different colors, and improving the uniformity of the display device.

[0172] In this embodiment, when the display panel is prepared, the preparation sequence of each film layer is: the flat film layer 07, the red filter unit 121, the blue filter unit 123, the touch electrode 13, the flat film layer 08, the touch electrode bridge 14, the flat film layer 09, the green filter unit 122, the black matrix 11, and the flat film layer 10. In this embodiment, the flat film layer 09 and the flat film layer 10 do not form the second opening.

[0173] Further, if the refractive index of the red filter unit 121 is less than the refractive index of the green filter unit 122, and the refractive index of the green filter unit 122 is less than the refractive index of the blue filter unit 123, the red filter unit 121 can be formed in the second opening defined by the flat film layer 07, the green filter unit 122 can be formed in the second opening defined by the flat film layer 08, and the blue filter unit 123 can be formed in the second opening defined by the flat film layer 09.

[0174] If the refractive index of the green filter unit 122 is less than the refractive index of the blue filter unit 123, and the refractive index of the blue filter unit 123 is less than the refractive index of the red filter unit 121, the green filter unit 122 can be formed in the second opening defined by the flat film layer 07, the blue filter unit 123 can be formed in the second opening defined by the flat film layer 08, and the red filter unit 121 can be formed in the second opening defined by the flat film layer 09.

[0175] Embodiments of the present disclosure also provide a display device including the display panel as described above.

[0176] The display device includes, but is not limited to, a radio frequency unit, a network module, an audio output unit, an input unit, a sensor, a display unit, a user input unit, an interface unit, a memory, a processor, and a power supply, and the like. Those skilled in the art can understand that the structure of the display device does not constitute a limitation on the display device, and the display device can include more or less components described above, or combine certain components, or different component arrangements. In the embodiments of the present disclosure, the display device includes, but is not limited to, a display, a mobile phone, a tablet computer, a television, a wearable electronic device, a navigation display device, and the like.

[0177] The display device can be a television, a display, a digital photo frame, a mobile phone, a tablet computer, or any product or component with a display function, wherein the display device further includes a flexible circuit board, a printed circuit board, and a back plate.

[0178] Embodiments of the present disclosure also provide a manufacturing method of a display panel, for manufacturing the display panel described above, the manufacturing method comprising:

[0179] providing a substrate substrate;

[0180] forming a pixel circuit layer, a black pixel defining layer, an encapsulation layer, and a planarization layer on the substrate substrate in sequence, the black pixel defining layer having a plurality of first openings, the planarization layer having a plurality of second openings, the plurality of first openings and the plurality of second openings being arranged in pairs in a direction parallel to a bearing surface of the substrate substrate;

[0181] forming a light emitting element in the first opening;

[0182] forming a light filtering assembly in the second opening, the light filtering assembly including a light-transmitting protruding portion and a light filtering unit covering the light-transmitting protruding portion, the light-transmitting protruding portion including a side surface forming an acute angle with the substrate substrate, the color of the light filtering unit in each of the second openings being the same as the color of the light emitting element in the corresponding first opening;

[0183] wherein the refractive index of the light-transmitting protruding portion is greater than the refractive index of the light filtering unit.

[0184] In the present embodiment, the light filtering assembly includes a light-transmitting protruding portion and a light filtering unit covering the light-transmitting protruding portion, the light-transmitting protruding portion includes a side surface forming an acute angle with the substrate substrate, the refractive index of the light-transmitting protruding portion is greater than the refractive index of the light filtering unit, and the light filtering unit covers the side surface of the light-transmitting protruding portion. In this way, when the large viewing angle light emitted by the light emitting element exits through the light-transmitting protruding portion, refraction will occur on the side surface of the light-transmitting protruding portion, and the light will be deflected to a direction close to the normal viewing angle, thereby improving the light extraction efficiency at the normal viewing angle.

[0185] In the embodiments of the methods of the present disclosure, the sequence numbers of the steps do not serve to limit the order of the steps, and for those skilled in the art, the changes in the order of the steps without creative effort are within the protection scope of the present disclosure.

[0186] It should be noted that each of the embodiments in the present disclosure is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment mainly describes the differences from other embodiments. In particular, for the embodiments, since they are basically similar to the product embodiments, the description is relatively simple, and the related parts can be referred to the part of the description of the product embodiments.

[0187] Unless otherwise defined, technical terms or scientific terms used in the present disclosure should be understood as the common meanings of those terms for those skilled in the art of the present disclosure. The terms "first", "second", and similar terms used in the present disclosure do not denote any order, quantity, or importance, but are used to distinguish different components. The terms "include", "contain", and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, without excluding other elements or objects. The terms "connect" or "connected" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are only used to represent relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships can also be changed accordingly.

[0188] It can be understood that when an element such as a layer, a film, a region, or a substrate is referred to as being "on" or "under" another element, it can be "directly" on or under the other element, or an intermediate element can be present.

[0189] In the description of the above-described embodiments, specific features, structures, materials, or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0190] The above description is merely specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present disclosure, which should be covered by the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A display panel, characterized by, The display panel comprises: a substrate substrate; a pixel circuit layer, a black pixel defining layer, an encapsulation layer and a planarization layer which are sequentially stacked on one side of the substrate substrate and away from the substrate substrate, the black pixel defining layer has a plurality of first openings, the planarization layer has a plurality of second openings, the plurality of first openings and the plurality of second openings are arranged in pairs and correspondingly in intervals along a direction parallel to a bearing surface of the substrate substrate; a light emitting element located in each of the first openings; a light filtering assembly located in each of the second openings, the light filtering assembly comprises a light-transmitting protruding part and a light filtering unit covering the light-transmitting protruding part, the light-transmitting protruding part comprises a side surface which is an acute angle with the substrate substrate, the color of the light filtering unit in each of the second openings is the same as the color of the light emitting element in the corresponding first opening; wherein the refractive index of the light-transmitting protruding part is greater than the refractive index of the light filtering unit.

2. The display panel of claim 1, wherein, The light filtering unit comprises first light filtering units and second light filtering units which are different in color, the refractive index of the first light filtering units is greater than the refractive index of the second light filtering units, in each of the second openings, the number of light-transmitting protruding parts covered by the first light filtering units is greater than the number of light-transmitting protruding parts covered by the second light filtering units; and / or the height of the light-transmitting protruding parts covered by the first light filtering units is greater than the height of the light-transmitting protruding parts covered by the second light filtering units.

3. The display panel of claim 1, wherein, The acute angle is 65-85°.

4. The display panel of claim 1, wherein, The orthographic projection of the first opening on the substrate substrate is located in the orthographic projection of a first boundary on the substrate substrate, the first boundary is the boundary of the light-transmitting protruding part on the side close to the boundary of the second opening.

5. The display panel of claim 4, wherein, The distance between the boundary of the first opening and the first boundary is 0.5-2 microns.

6. The display panel of claim 1, wherein, The cross section of the light-transmitting protruding part in the direction perpendicular to the substrate substrate is a right trapezoid.

7. The display panel of any one of claims 1-6, wherein, The distance between the light filtering assembly corresponding to the light filtering unit of different refractive index and the light emitting element is different.

8. The display panel of claim 7, wherein, The light filtering unit comprises first light filtering units and second light filtering units which are different in color, the refractive index of the first light filtering units is greater than the refractive index of the second light filtering units, the distance between the light filtering assembly corresponding to the first light filtering units and the plane where the light emitting element is located is greater than the distance between the light filtering assembly corresponding to the second light filtering units and the plane where the light emitting element is located.

9. The display panel of claim 8, wherein, The light filtering unit further comprises third light filtering units, the refractive index of the third light filtering units is the same as that of the second light filtering units, the distance between the light filtering assembly corresponding to the third light filtering units and the plane where the light emitting element is located is equal to the distance between the light filtering assembly corresponding to the second light filtering units and the plane where the light emitting element is located.

10. The display panel of claim 8, wherein, The light filtering unit further comprises third light filtering units, the refractive index of the third light filtering units is less than that of the second light filtering units, the distance between the light filtering assembly corresponding to the third light filtering units and the plane where the light emitting element is located is less than the distance between the light filtering assembly corresponding to the second light filtering units and the plane where the light emitting element is located.

11. The display panel of any one of claims 1-6, wherein, The orthographic projection of the first opening on the substrate substrate is located in the orthographic projection of the corresponding second opening on the substrate substrate.

12. The display panel of claim 11, wherein, A minimum distance between a normal projection of a boundary of the second opening on the substrate and a normal projection of a boundary of the corresponding first opening on the substrate is 0.5-2 microns.

13. The display panel of claim 1, wherein, The planar layer includes a plurality of planar film layers stacked in sequence in a direction away from the substrate. The plurality of planar film layers includes at least one first planar film layer for forming the second opening, a refractive index of the at least one first planar film layer being greater than a refractive index of the light filtering unit, and the at least one first planar film layer being disposed in the same layer and of the same material as the light-transmitting protrusion.

14. The display panel of claim 13, wherein, A refractive index of a first planar film layer for forming the second opening is greater than 1.

7.

15. The display panel of claim 13, wherein, The plurality of planar film layers further includes at least one second planar film layer, the second planar film layer not being provided with the second opening, and a refractive index of the second planar film layer being less than the refractive index of the light filtering unit.

16. The display panel of claim 1, wherein, The display panel further includes: A black matrix between adjacent light filtering assemblies, a normal projection of the black matrix on the substrate being located within a normal projection of the black pixel defining layer on the substrate.

17. The display panel of claim 16, wherein, The display panel further includes: A touch electrode between adjacent light filtering assemblies, a normal projection of the touch electrode on the substrate being located within a normal projection of the black matrix on the substrate.

18. A display device comprising: The display panel includes any one of claims 1-17.

19. A manufacturing method of a display panel, comprising: The display panel includes: A substrate is provided; A pixel circuit layer, a black pixel defining layer, an encapsulation layer, and a planar layer are sequentially formed on the substrate, the black pixel defining layer has a plurality of first openings, the planar layer has a plurality of second openings, the plurality of first openings and the plurality of second openings are arranged in pairs in a direction parallel to a bearing surface of the substrate; A light emitting element is formed in the first opening; A light filtering assembly is formed in the second opening, the light filtering assembly includes a light-transmitting protrusion and a light filtering unit covering the light-transmitting protrusion, the light-transmitting protrusion includes a side surface forming an acute angle with the substrate, a color of the light filtering unit in each second opening is the same as a color of the light emitting element in the corresponding first opening; A refractive index of the light-transmitting protrusion is greater than a refractive index of the light filtering unit.

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