Display panel and display device

Abstract

A display panel and a display device. The display panel comprises a display backplane, a light-shielding layer, and an anti-reflection layer. The display backplane comprises a pixel definition layer, and the pixel definition layer is provided with a pixel opening; the light-shielding layer is provided on a display side of the display backplane, the light-shielding layer is provided with a first light-transmitting opening, and the orthographic projection of the first light-transmitting opening on the display backplane at least partially overlaps with the pixel opening; the anti-reflection layer is provided on the side of the light-shielding layer away from the display backplane, and the orthographic projection of the anti-reflection layer on the display backplane at least covers the orthographic projection of the first light-transmitting opening on the display backplane. The hue coordinates of the anti-reflection layer are (ag, bg), and the hue coordinates of the pixel definition layer are (ab, bb). When ag≤0 and bg≤0, ab≥0 and bb≥0; when ag≥0 and bg≤0, ab≤0 and bb≥0; when ag≥0 and bg≥0, ab≤0 and bb≤0; when ag≤0 and bg≥0, ab≥0 and bb≤0; and ag and bg are not both zero, ab and bb are not both zero, ag and bb are not both zero, and ab and bg are not both zero.

Description

Display panel and display device Technical Field

[0001] This disclosure relates to the field of display technology, and more specifically, to a display panel and a display device. Background Technology

[0002] Organic light-emitting diode (OLED) display panels have become the mainstream development direction in the field of display technology due to their advantages such as self-illumination, high brightness, good image quality, and low energy consumption.

[0003] However, OLED display panels are currently expensive and prone to color distortion.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a display panel and display device.

[0006] According to one aspect of this disclosure, a display panel is provided, comprising:

[0007] The display back panel includes a pixel definition layer, on which pixel openings are provided;

[0008] A light-shielding layer is disposed on the display side of the display back panel, and a first light-transmitting opening is provided on the light-shielding layer. The orthographic projection of the first light-transmitting opening on the display back panel at least partially overlaps with the pixel opening.

[0009] An anti-reflection layer is disposed on the side of the light-shielding layer opposite to the display back panel, and the orthographic projection of the anti-reflection layer on the display back panel at least covers the orthographic projection of the first light-transmitting opening on the display back panel.

[0010] The hue coordinates of the antireflection layer are (a g b g The hue coordinates of the pixel definition layer are (a b b b ),

[0011] when a g ≤0, b g If a ≤ 0, then a b ≥0, b b ≥0;

[0012] when a g ≥0, b gIf a ≤ 0, then a b ≤0, b b ≥0;

[0013] when a g ≥0, b g If a ≥ 0, then a b ≤0, b b ≤0;

[0014] when a g ≤0, b g If a ≥ 0, then a b ≥0, b b ≤0;

[0015] And a g With b g a is not zero at the same time b With b b a is not zero at the same time g With b b a is not zero at the same time b With b g They are not both zero at the same time.

[0016] In one exemplary embodiment of this disclosure, -70 < a g +a b <70, -70<b g +b b <70.

[0017] In one exemplary embodiment of this disclosure, -30 < a g +a b <30, -30<b g +b b <30.

[0018] In one exemplary embodiment of this disclosure, -10 < a g +a b <10, -10<b g +b b <10.

[0019] In one exemplary embodiment of this disclosure, the color of the anti-reflection layer is complementary to the color of the pixel definition layer.

[0020] In one exemplary embodiment of this disclosure, the display panel further includes:

[0021] A dimming layer includes a protrusion located within a first light-transmitting opening. An antireflective layer covers the dimming layer such that a first recess is provided on the side of the antireflective layer closest to the dimming layer. The protrusion is located within the first recess. The refractive index of the dimming layer is greater than that of the antireflective layer.

[0022] In one exemplary embodiment of this disclosure, the protrusion fills the first light-transmitting opening, and the height of the protrusion in the second direction is greater than the height of the light-shielding layer in the second direction, the second direction being perpendicular to the side of the display back panel on which the light-shielding layer is disposed.

[0023] In one exemplary embodiment of this disclosure, the difference between the refractive index of the dimming layer and the refractive index of the antireflective layer is greater than or equal to 0.05.

[0024] In an exemplary embodiment of this disclosure, the antireflection layer includes an antireflection portion that fills the first light-transmitting opening, and the height of the antireflection portion in a second direction is greater than the height of the light-shielding layer in the second direction, the second direction being perpendicular to the side of the display back panel where the light-shielding layer is disposed; the display panel further includes:

[0025] A second planarization layer covers the antireflection layer such that a second recess is provided on the side of the second planarization layer close to the antireflection layer, a portion of the antireflection portion is located within the second recess, and the refractive index of the antireflection layer is greater than the refractive index of the second planarization layer.

[0026] In one exemplary embodiment of this disclosure, the difference between the refractive index of the antireflection layer and the refractive index of the second planarization layer is greater than or equal to 0.05.

[0027] In one exemplary embodiment of this disclosure, the display back panel includes:

[0028] The first electrode, the pixel definition layer is disposed on one side of the first electrode, the pixel opening is connected to the first electrode, and the orthographic projection of the first light-transmitting opening on the display back panel is located inside the first electrode;

[0029] A light-emitting layer group is disposed at least within the pixel opening;

[0030] The second electrode is disposed on the side of the light-emitting layer group opposite to the first electrode.

[0031] In one exemplary embodiment of this disclosure, the orthographic projection of the light-shielding layer onto the display back panel overlaps with the sidewall of the pixel opening.

[0032] In one exemplary embodiment of this disclosure, the light-shielding layer includes:

[0033] A first light-shielding part, wherein a second light-transmitting opening is provided on the first light-shielding part;

[0034] The second light-shielding part is configured as a ring, located inside the second light-transmitting opening and spaced apart from the first light-shielding part. The inner ring of the second light-shielding part is the first light-transmitting opening, and the orthographic projection of the second light-shielding part on the display back panel at least partially overlaps with the sidewall of the pixel opening.

[0035] In one exemplary embodiment of this disclosure, the orthographic projection of the second light-shielding portion onto the display back panel completely covers the sidewall of the pixel opening.

[0036] In one exemplary embodiment of this disclosure, the display back panel further includes:

[0037] The driving substrate includes multiple driving circuits arranged in an array and a first planarization layer. The first planarization layer is disposed on the side of the driving circuits close to the pixel definition layer, and the color of the first planarization layer is different from the color of the pixel definition layer.

[0038] In one exemplary embodiment of this disclosure, the color of the first planarization layer is complementary to the color of the pixel definition layer.

[0039] In one exemplary embodiment of this disclosure, the pixel openings are configured as a plurality of ones, and the first light-transmitting openings are configured as a plurality of ones; the display panel further includes:

[0040] The transparent filling layer includes multiple filling portions, at least a portion of which is disposed within the first light-transmitting opening. The thickness of the filling portion in a second direction is inversely proportional to the opening area of ​​the first light-transmitting opening. The second direction is perpendicular to the side of the display back panel where the light-shielding layer is disposed.

[0041] In an exemplary embodiment of this disclosure, a plurality of pixel openings include a first sub-pixel opening, a second sub-pixel opening, and a third sub-pixel opening. A plurality of first light-transmitting openings include a first sub-light-transmitting opening, a second sub-light-transmitting opening, and a third sub-light-transmitting opening. The orthographic projection of the first sub-light-transmitting opening on the display back panel at least partially overlaps with the first sub-pixel opening. The orthographic projection of the second sub-light-transmitting opening on the display back panel at least partially overlaps with the second sub-pixel opening. A plurality of filling portions include a first filling portion and a second filling portion. The first filling portion is disposed within the first sub-light-transmitting opening, and the second filling portion is disposed within the second sub-light-transmitting opening. The opening area of ​​the first sub-light-transmitting opening is smaller than the opening area of ​​the second sub-light-transmitting opening, and the opening area of ​​the second sub-light-transmitting opening is smaller than the opening area of ​​the third sub-light-transmitting opening. In the second direction, the thickness of the first filling portion is greater than the thickness of the second filling portion.

[0042] In one exemplary embodiment of this disclosure, the display panel further includes a touch layer group disposed between the display back panel and the light-shielding layer; the touch layer group includes:

[0043] A base layer is disposed on the light-emitting side of the display back panel;

[0044] The first touch function layer is located on the side of the base layer opposite to the display back panel;

[0045] A touch-insulating layer is disposed on the side of the first touch function layer opposite to the display back panel;

[0046] The second touch function layer is disposed on the side of the touch insulating layer opposite to the display back panel, and the light-shielding layer covers the second touch function layer.

[0047] According to another aspect of this disclosure, a display device is provided, comprising:

[0048] The display panel is any of the display panels described above.

[0049] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0050] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0051] Figure 1 is a schematic diagram of the structure of a first example embodiment of the display panel of this disclosure.

[0052] Figure 2 is a schematic diagram of the structure of the back panel shown in Figure 1.

[0053] Figures 3 and 4 are schematic diagrams of the two steps in the preparation process of the pixel definition layer in the display panel of this disclosure.

[0054] Figure 5 is a schematic diagram comparing the transmittance of the antireflection layer for different colors of light when the antireflection layer has a purplish tint.

[0055] Figure 6 is a schematic diagram showing the transmittance curves of the antireflection layer for various colors of light and the wavelength curve of the light reflected by the first electrode when the antireflection layer is purplish in color and a green pixel definition layer is set.

[0056] Figure 7 is a schematic diagram showing the transmittance curves of the antireflection layer for various colors of light and the wavelength curve of the light reflected by the first electrode when the antireflection layer is bluish and a yellow pixel definition layer is set.

[0057] Figure 8 is a structural schematic diagram of a second example embodiment of the display panel of this disclosure.

[0058] Figure 9 is a structural schematic diagram of a third example embodiment of the display panel of this disclosure.

[0059] Figure 10 is a structural schematic diagram of a fourth exemplary embodiment of the display panel of this disclosure.

[0060] Figure 11 is a structural schematic diagram of a fifth exemplary embodiment of the display panel of this disclosure.

[0061] Figure 12 is a structural schematic diagram of a sixth exemplary embodiment of the display panel of this disclosure.

[0062] Figure 13 is a structural schematic diagram of a seventh exemplary embodiment of the display panel of this disclosure.

[0063] Figure 14 is a top view of Figure 13.

[0064] Figure 15 is a structural schematic diagram of the eighth exemplary embodiment of the display panel of this disclosure.

[0065] Figure 16 is a top view of Figure 15.

[0066] Figure 17 is a schematic diagram of the steps for preparing the transparent filler layer in Figure 14.

[0067] Figure 18 is a schematic diagram of the ab hue color distribution of the Lab system.

[0068] Figure 19 is a schematic diagram of the color distribution after red, green and blue overlap.

[0069] Explanation of reference numerals in the attached drawings: 10. Display backplane; 1. Substrate; 2. Driving substrate; 21. Masking layer; 22. Buffer layer; 231. Channel portion; 232. Source connection portion; 233. Drain connection portion; 24. Gate insulating layer; 25. Gate layer; 251. Gate; 26. Interlayer dielectric layer; 27. First interconnect conductor layer; 271. Source; 272. Drain; 28. First planarization layer; 3. Light-emitting substrate; 31. First electrode; 32a. Pixel definition material layer; 32. Pixel definition layer; 321, Pixel opening; 321a, First sub-pixel opening; 321b, Second sub-pixel opening; 321c, Third sub-pixel opening; 322, Body portion; 323, Spacer; 33, Light-emitting layer group; 34, Second electrode; 35, Sub-pixel; 351, First sub-pixel; 352, Second sub-pixel; 353, Third sub-pixel; 4, Encapsulation layer group; 41, First inorganic layer; 42, Organic layer; 43, Second inorganic layer; 5, Touch layer group; 51, Base layer; 52, First touch functional layer; 53, Touch insulating layer; 54, Second touch functional layer; 6, Light-shielding layer; 61, First light-transmitting opening; 61a, First sub-light-transmitting opening; 61b, Second sub-light-transmitting opening; 61c, Third sub-light-transmitting opening; 62, First light-shielding portion; 621, Second light-transmitting opening; 63, Second light-shielding portion; 7. Anti-reflection layer; 71. Anti-reflection section; 711. First anti-reflection section; 712. Second anti-reflection section; 72. First recessed section; 8. Dimming layer; 81. Protrusion; 811. First part; 812. Second part; 9. Second planarization layer; 91. Second recessed section; 11a. Transparent filler material layer; 11. Transparent filler layer; 111. Filler section; 111a. First filler section; 111b. Second filler section; HTM. Halftone mask; HTMT. Transparent section; HTMN. Opaque section; HTMB. Semi-transparent section; X. First direction; Y. Second direction. Detailed Implementation

[0070] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0071] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0072] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0073] In this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Furthermore, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0074] In display panels using related technologies, a color filter layer is fabricated above each sub-pixel 35 as an anti-reflection layer to reduce the reflection of ambient light. This technology requires fabricating a red filter layer above the red sub-pixel, a green filter layer above the green sub-pixel, and a blue filter layer above the blue sub-pixel. Display panels using color filters have higher transmittance than those using polarizers (whose transmittance is generally unlikely to exceed 50% due to the principle of polarizers). However, different color filters require separate photolithography processes, leading to complex manufacturing processes and high production costs. Furthermore, the color filter layer of OLED display panels involves low-temperature processes. The resins and curing agents used in the color filter layer of OLED display panels are significantly different from those used in the high-temperature color filter layer of ordinary LCDs (Liquid Crystal Displays), further contributing to the high cost of OLED display panels.

[0075] This disclosure provides an example embodiment of a display panel. Referring to Figures 1-17, the display panel may include a display back panel 10, a light-shielding layer 6, and an anti-reflection layer 7. The display back panel 10 may include a pixel definition layer 32, on which pixel openings 321 are provided. The light-shielding layer 6 is disposed on the display side of the display back panel 10, and a first light-transmitting opening 61 is provided on the light-shielding layer 6. The orthographic projection of the first light-transmitting opening 61 on the display back panel 10 at least partially overlaps with the pixel opening 321. The anti-reflection layer 7 is disposed on the side of the light-shielding layer 6 away from the display back panel 10. The orthographic projection of the anti-reflection layer 7 on the display back panel 10 at least covers the orthographic projection of the first light-transmitting opening 61 on the display back panel 10. The hue coordinates of the anti-reflection layer 7 are (α...). g b g The hue coordinates of pixel definition layer 32 are (a b b b ), when a g ≤0, b g If a ≤ 0, then a b ≥0, b b ≥0; when a g ≥0, b g If a ≤ 0, then a b ≤0, b b ≥0; when a g ≥0, b g If a ≥ 0, then a b ≤0, b b ≤0; when a g ≤0, b g If a ≥ 0, then a b ≥0, b b ≤0; and a g With b g a is not zero at the same time b With b b a is not zero at the same time g With b b a is not zero at the same time b With b g They are not both zero at the same time.

[0076] The display panel disclosed herein has several advantages. First, the anti-reflection layer 7 can absorb light that deviates from the emission wavelength range of the red, green, and blue sub-pixels, thereby reducing the reflection of ambient light by the display panel. Second, the anti-reflection layer 7 can replace the red, green, and blue filter layers, reducing the manufacturing process of the display panel and thus lowering production costs. Third, the light passing through the anti-reflection layer 7 and the light passing through the pixel definition layer 32 can mix to produce a certain complementary effect, thereby mitigating or even avoiding color distortion in the display panel. Moreover, after the pixel definition layer 32 is colorized, the display panel can selectively increase the transmittance of one or two of the red, green, and blue bands, thereby improving light extraction efficiency and reducing power consumption.

[0077] The display back panel 10 can be an OLED (Organic Light-Emitting Diode) display back panel 10, a QLED (Quantum Dot Light Emitting Diodes) display back panel 10, etc.; the display back panel 10 has a light-emitting side and a non-light-emitting side, which are arranged opposite to each other. The light-emitting side can display the image, and the side displaying the image is the display surface.

[0078] The following explanation uses the OLED display back panel 10 as an example.

[0079] In this exemplary embodiment, referring to FIG2, the display backplane 10 may include a substrate 1. The material of the substrate 1 may include inorganic materials, such as glass, quartz, or metal. The material of the substrate 1 may also include organic materials, such as resins like polyimide, polycarbonate, polyacrylate, polyetherimide, polyethersulfone, polyethylene terephthalate, and polyethylene naphthalate. The substrate 1 may be formed from multiple material layers; for example, the substrate 1 may include multiple substrate layers, and the material of the substrate layers may be any of the aforementioned materials. Of course, the substrate 1 may also be a single layer, and may be any of the aforementioned materials.

[0080] Referring to FIG2, the display back panel 10 may further include a driving substrate 2 and a light-emitting substrate 3. The driving substrate 2 is disposed on one side of the substrate 1, and the light-emitting substrate 3 is disposed on the side of the driving substrate 2 opposite to the substrate 1. The driving substrate 2 may include multiple driving circuits arranged in an array, and the light-emitting substrate 3 may include multiple light-emitting devices arranged in an array. The driving circuits can drive the light-emitting devices to emit light.

[0081] Specifically, referring to Figure 2, a shielding layer 21 can be provided on one side of the substrate 1. Light incident from the substrate 1 into the active layer generates photogenerated carriers in the active layer, which in turn has a significant impact on the characteristics of the thin-film transistor, ultimately affecting the display quality of the display device. The shielding layer 21 can block the light incident from the substrate 1, thereby preventing it from affecting the characteristics of the thin-film transistor and thus avoiding impact on the display quality of the display device. Depending on the type of thin-film transistor, the shielding layer 21 can be omitted.

[0082] A buffer layer 22 can also be formed on the side of the shielding layer 21 facing away from the substrate 1. The buffer layer 22 serves to block moisture and impurity ions in the substrate 1 (especially organic materials) and to increase hydrogen ions for the subsequently formed active layer. The buffer layer 22 is made of an insulating material to insulate the shielding layer 21 from the active layer. The buffer layer 22 may include silicon nitride, silicon oxide, or silicon oxynitride. Depending on the type of substrate 1 or the process conditions, the buffer layer 22 may be omitted.

[0083] An active layer is provided on the side of the buffer layer 22 facing away from the substrate 1. The active layer may include a channel portion 231 and conductor portions disposed at both ends of the channel portion 231. One of the two conductor portions is a source connection portion 232, and the other is a drain connection portion 233. A gate insulating layer 24 is provided on the side of the active layer facing away from the substrate 1. A gate layer 25 is provided on the side of the gate insulating layer 24 facing away from the substrate 1. The gate layer 25 may include a gate 251 and a gate line (not shown in the figure).

[0084] An interlayer dielectric layer 26 is provided on the side of the gate layer 25 facing away from the substrate 1. A connection via is provided on the interlayer dielectric layer 26, which connects to the source connection portion 232 and the drain connection portion 233. A first connection conductor layer 27 is provided on the side of the interlayer dielectric layer 26 facing away from the substrate 1. The first connection conductor layer 27 may include a source 271, a drain 272, and a data line (not shown in the figure). The data line may be connected to the source 271, or a part of the data line may be used as the source 271. The source 271 is connected to the source connection portion 232 through the connection via on the interlayer dielectric layer 26, and the drain 272 is connected to the drain connection portion 233 through the connection via on the interlayer dielectric layer 26.

[0085] In some other exemplary embodiments of this disclosure, a passivation layer is provided on the side of the first connection conductor layer 27 facing away from the substrate 1, and a connection via is also provided on the passivation layer; a second connection conductor layer is provided on the side of the passivation layer facing away from the substrate 1, and the second connection conductor layer may include a second source and / or a second drain, and the second source and the second drain are respectively connected to the source 271 and the drain 272 through the connection via on the passivation layer. Of course, a third connection conductor layer, a fourth connection conductor layer, etc., may also be provided as needed.

[0086] Referring to Figure 2, a first planarization layer 28 is provided on the side of the first connection conductor layer 27 facing away from the substrate 1, that is, the first planarization layer 28 is provided on the side of the driving circuit near the pixel definition layer 32; a connection via is provided on the first planarization layer 28, and the connection via is connected to the drain 272. The channel portion 231, gate 251, source 271 and drain 272 form a thin film transistor.

[0087] It should be noted that the thin-film transistor described in this specification is a top-gate thin-film transistor. In other exemplary embodiments of this disclosure, the thin-film transistor may also be a bottom-gate or dual-gate type, and its specific structure will not be described in detail here. Moreover, in cases where thin-film transistors with opposite polarities are used or where the current direction changes during circuit operation, the functions of "source 271" and "drain 272" are sometimes interchanged. Therefore, in this specification, "source 271" and "drain 272" can be interchanged.

[0088] Please refer to Figure 2. A light-emitting substrate 3 is disposed on the side of the first planarization layer 28 that is away from the substrate 1. The light-emitting substrate 3 may include a first electrode 31, a pixel definition layer 32, a light-emitting layer group 33, and a second electrode 34.

[0089] Specifically, a first electrode 31 is provided on the side of the first planarization layer 28 away from the substrate 1. The first electrode 31 is connected to the drain 272 of the driving backplate through a connecting via. The drain 272 provides a driving signal to the first electrode 31. The first electrode 31 can be an anode (pixel electrode).

[0090] A pixel definition layer 32 is disposed on the side of the first electrode 31 facing away from the substrate 1, such that the first planarization layer 28 is disposed on the side of the pixel definition layer 32 facing away from the light-shielding layer 6. Referring to FIG2, a pixel opening 321 is disposed on the pixel definition layer 32, and the pixel opening 321 is connected to the first electrode 31, so that at least a portion of the first electrode 31 is not covered by the pixel definition layer 32. The material of the pixel definition layer 32 may include positive exposure resin or negative exposure resin and pigments or dyes. The resin may be acrylate, Cardo (fluorene), olefin, phenolic resin, polyimide, polysiloxane, polyurethane, etc. The color of the pigment or dye may include: black, yellow, brown, green, blue, red, cyan, orange, purple, etc.

[0091] In some exemplary embodiments of this disclosure, the pixel definition layer 32 may include a body portion 322 and a spacer 323, with the spacer 323 disposed on a portion of the body portion 322 on the side facing away from the substrate 1.

[0092] Referring to Figures 3 and 4, the pixel definition layer 32 can be formed using a halftone (HT) process. Specifically, a pixel definition material layer 32a is formed on the side of the first electrode 31 facing away from the substrate 1. A halftone mask (HTM) is disposed on the side of the pixel definition material layer 32a facing away from the substrate 1. The halftone mask (HTM) may include a light-transmitting portion (HTMT), an opaque portion (HTMN), and a semi-transparent portion (HTMB). The pixel definition material layer 32 is formed by an exposure and development process on the pixel definition material layer 32a. The pixel definition material layer 32a opposite to the light-transmitting portion (HTMT) is completely removed. The pixel definition material layer 32a opposite to the opaque portion (HTMN) retains its original thickness, which is the structure of the body portion 322 and the spacer 323. The pixel definition material layer 32a opposite to the semi-transparent portion (HTMB) is thinned to the thickness of the body portion 322, that is, a portion of the thickness of the pixel definition material layer 32a is removed. This reduces the number of masking processes required to form the spacer 323, thereby reducing the number of manufacturing steps for the display panel and lowering production costs.

[0093] The thickness of the spacer 323 in the second direction Y is greater than or equal to 0.5 micrometers and less than or equal to 2 micrometers. For example, the thickness of the spacer 323 in the second direction Y can be 0.7 micrometers, 1 micrometer, 1.3 micrometers, 1.5 micrometers, 1.8 micrometers, etc. The thickness of the body portion 322 in the second direction Y is greater than or equal to 0.5 micrometers and less than or equal to 1.7 micrometers. For example, the thickness of the body portion 322 in the second direction Y can be 0.7 micrometers, 1 micrometer, 1.3 micrometers, 1.5 micrometers, etc. Therefore, the overall thickness of the body portion 322 and the spacer 323 is greater than or equal to 1 micrometer and less than or equal to 3.7 micrometers.

[0094] Of course, the pixel definition layer 32 can be formed through other processes (non-halftone mask process), which will not be elaborated here.

[0095] Referring to Figure 2, at least one light-emitting layer group 33 is provided on the side of the first electrode 31 facing away from the substrate 1, meaning at least a portion of the light-emitting layer group 33 is located within the pixel opening 321 and connected to the first electrode 31. A second electrode 34 is provided on the side of the light-emitting layer group 33 facing away from the substrate 1; the second electrode 34 can be a cathode (common electrode). The light-emitting layer group 33 within a pixel opening 321 emits light to form a sub-pixel 35, such that the orthographic projection of the sub-pixel 35 onto the substrate 1 is the orthographic projection of the light-emitting layer group 33 within the pixel opening 321 onto the substrate 1.

[0096] It should be noted that since the sidewall of the pixel opening 321 of the pixel definition layer 32 is inclined, the sub-pixel 35 refers to the range of the bottom wall of the pixel opening 321 of the pixel definition layer 32. In other words, the sub-pixel 35 refers to the range defined by the edge of the pixel opening 321 of the pixel definition layer 32 on the side closer to the substrate 1.

[0097] The display backplane 10 may include a plurality of sub-pixels 35. Specifically, the display backplane 10 may include a plurality of first sub-pixels 351, a plurality of second sub-pixels 352, and a plurality of third sub-pixels 353. The first sub-pixels 351 may be red sub-pixels, that is, the first sub-pixels 351 may emit red light; the second sub-pixels 352 may be green sub-pixels, that is, the second sub-pixels 352 may emit green light; and the third sub-pixels 353 may be blue sub-pixels, that is, the third sub-pixels 353 may emit blue light. Of course, in some other exemplary embodiments of this disclosure, the display backplane 10 may include a plurality of fourth sub-pixels, which may be white sub-pixels, that is, the fourth sub-pixels may emit white light.

[0098] It should be noted that the limitation on the emission color of each sub-pixel 35 is only an example. This disclosure does not make specific limitations on the emission color of each sub-pixel 35. The following explanation uses the first sub-pixel 351, the second sub-pixel 352, and the third sub-pixel 353 as examples, corresponding to the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B, respectively.

[0099] Referring to Figure 2, the display backplane 10 may further include an encapsulation layer group 4, which is disposed on the side of the light-emitting substrate 3 facing away from the substrate 1. For example, the encapsulation layer group 4 may include a first inorganic layer 41, an organic layer 42, and a second inorganic layer 43. The first inorganic layer 41 is disposed on the side of the second electrode 34 facing away from the substrate 1. The material of the first inorganic layer 41 may be silicon nitride (SiNx) or silicon oxynitride (SiNO), etc. The first inorganic layer 41 can be formed on the side of the second electrode 34 facing away from the substrate 1 by chemical vapor deposition (CVD). The organic layer 42 is disposed on the side of the first inorganic layer 41 facing away from the substrate 1, and the material of the organic layer 42 may be acrylic, epoxide, or other organic materials. The second inorganic layer 43 is disposed on the side of the organic layer 42 facing away from the substrate 1. The material of the second inorganic layer 43 can be silicon nitride (SiNx) or silicon oxynitride (SiNO), etc. The second inorganic layer 43 can be formed on the side of the organic layer 42 facing away from the substrate 1 by chemical vapor deposition (CVD). The light-emitting layer 33 can be encapsulated by the encapsulation layer group 4 to isolate it from corrosion by water / oxygen in the air.

[0100] Referring to Figure 1, a light-shielding layer 6 is provided on the display side of the display back panel 10. A first light-transmitting opening 61 is provided on the light-shielding layer 6. The orthographic projection of the first light-transmitting opening 61 on the display back panel 10 at least partially overlaps with the pixel opening 321. For example, the orthographic projection of the first light-transmitting opening 61 on the display back panel 10 may cover the pixel opening 321, or the edge line of the orthographic projection of the first light-transmitting opening 61 on the display back panel 10 may coincide with the edge line of the pixel opening 321, so that the light emitted through each sub-pixel 35 can be emitted through the first light-transmitting opening 61, avoiding the light-shielding layer 6 from blocking the light emitted by each sub-pixel 35. Alternatively, the orthographic projection of the first light-transmitting opening 61 on the display back panel 10 may be located inside the pixel opening 321, or a portion of the orthographic projection of the first light-transmitting opening 61 on the display back panel 10 may overlap with a portion of the pixel opening 321.

[0101] An antireflection layer 7 is disposed on the side of the light-shielding layer 6 facing away from the display back panel 10. The orthogonal projection of the antireflection layer 7 onto the display back panel 10 at least covers the orthogonal projection of the first light-transmitting opening 61 onto the display back panel 10, so that light emitted through the first light-transmitting opening 61 must pass through the antireflection layer 7 before it can be emitted. The material of the antireflection layer 7 may include resin and pigments or dyes. The resin may be a negative exposure resin or a positive exposure resin, for example, it may be acrylate, Cardo (fluorene), olefin, phenolic resin, polyimide, polysiloxane, polyurethane, etc. The color of the pigment or dye may include: black, yellow, brown, green, blue, red, cyan, orange, purple, etc., so that the color of the antireflection layer 7 may include: black, yellow, brown, green, blue, red, cyan, orange, purple, etc.

[0102] The anti-reflection layer 7 has the ability to transmit red, green, and blue light, with peak transmittance for each color between 30% and 70%. For example, the peak transmittance for red, green, and blue can be 35%, 40%, 45%, 50%, 55%, 60%, 65%, etc. This ensures that ambient light entering the display panel through the anti-reflection layer 7 also has red, green, and blue light, with peak transmittance for each color between 30% and 70%. Other light is absorbed by the anti-reflection layer 7. In other words, the anti-reflection layer 7 can absorb light that deviates from the emission wavelength range of the red, green, and blue sub-pixels, thereby reducing the reflection of ambient light by the display panel while avoiding a decrease in display brightness.

[0103] Therefore, the anti-reflection layer 7 can replace the red, green, and blue light filters, reducing at least two masking processes and thus the manufacturing process of the display panel, thereby lowering production costs. Furthermore, the structure using red, green, and blue light filters, which are formed through three masking processes, results in poor surface flatness, requiring a planarization layer for planarization. In contrast, the anti-reflection layer 7 is formed through a single masking process and also possesses a certain leveling function, resulting in a higher surface flatness and eliminating the need for a planarization layer. This further reduces the need for a planarization layer, further simplifying the display panel manufacturing process and lowering production costs.

[0104] However, because the anti-reflection layer 7 has light transmission peaks in the red, green, and blue wavelengths of the spectrum, it causes color casts. For example, the color of the anti-reflection layer 7 may appear bluish, purplish, greenish, yellowish, cyan, reddish, or neutral black. When the anti-reflection layer 7 is used in a display panel, the display panel will also exhibit color casts, failing to meet the color requirements of display devices (e.g., mobile phones). For example, the hue a* of a color filter layer using red, green, and blue filters is approximately -0.5, and the hue b* is approximately -3.0; while the hue a* of a color filter layer using anti-reflection layer 7 is approximately 2.0, and the hue b* is approximately -4.5.

[0105] Referring to Figure 18, the CIE 1976 hue coordinate system has the following axes: a-axis: represents the red-green axis, +a indicates the red direction, -a indicates the green direction; b-axis: represents the yellow-blue axis, +b indicates the yellow direction, -b indicates the blue direction; in the first quadrant, the color gradually changes from red to yellow counterclockwise; in the second quadrant, the color gradually changes from yellow to green counterclockwise; in the third quadrant, the color gradually changes from green to blue counterclockwise; and in the fourth quadrant, the color gradually changes from blue to red counterclockwise.

[0106] Referring to Figure 19, red and green are superimposed to form yellow, red and blue are superimposed to form purple (e.g., bright purple), green and blue are superimposed to form cyan (e.g., green-blue, light blue); and red, green and blue are superimposed to form white.

[0107] In this example implementation, the hue coordinates of the anti-reflection layer 7 are (a g b g The hue coordinates of pixel definition layer 32 are (a b b b ), when a g ≤0, b g If a ≤ 0, then a b ≥0, b b ≥0; when a g ≥0, b g If a ≤ 0, then a b ≤0, b b ≥0; when a g ≥0, b g If a ≥ 0, then a b ≤0, b b ≤0; when a g ≤0, b g If a ≥ 0, then a b ≥0, b b ≤0, and a g With b g a is not zero at the same time b With b b a is not zero at the same timeg With b b a is not zero at the same time b With b g They are not both zero at the same time. That is, a g The sign of a and a b The positive and negative signs are opposite, b g The positive and negative of b b The positive and negative signs are opposite, causing the hue coordinates of the subreflection layer 7 and the hue coordinates of the pixel definition layer 32 to be located in two quadrants opposite to the origin of the CIE1976 hue coordinate system, or a g With a b Located at the positive and negative ends of the a-axis, or b g With b b Located at the positive and negative ends of the b-axis, it allows the light passing through the anti-reflection layer 7 to mix with the light passing through the pixel definition layer 32, creating a complementary effect that reduces or even eliminates color cast defects in the display panel.

[0108] Alternatively, -70 < a g +a b <70, -70<b g +b b <70. For example, a g +a b It can be -65, -60, -55, -50, -45, -40, -35, -30, -25, -20, -15, -10, -5, 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, etc., b g +b b It can be -65, -60, -55, -50, -45, -40, -35, -30, -25, -20, -15, -10, -5, 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, etc.

[0109] Alternatively, -30 < a g +a b <30, -30<b g +b b <30. This allows the light passing through the antireflection layer 7 to mix with the light passing through the pixel definition layer 32, thereby producing a certain complementary effect, which reduces or even avoids color distortion in the display panel.

[0110] Alternatively, 10 < a g +a b <10, -10<b g +b b<10. This allows the light passing through the antireflection layer 7 to mix with the light passing through the pixel definition layer 32, creating a complementary effect that reduces or even eliminates color distortion in the display panel.

[0111] The hue coordinates of the anti-reflection layer 7 are (a g b g The hue coordinates of pixel definition layer 32 are (a b b b The result can be obtained directly through testing equipment or calculated using existing formulas, which will not be elaborated here.

[0112] Optionally, the color of the pixel definition layer 32 and the color of the anti-reflection layer 7 are complementary colors. In optics, if two different colors of light, when added in equal amounts, produce white light—that is, if two colors of light (monochromatic or polychromatic) mixed in an appropriate proportion can produce the sensation of white—then these two colors of light are called complementary colors. For example, 656nm red light and 492nm cyan light are complementary colors. Red and cyan (aquamarine) are complementary, blue and orange-yellow are complementary, yellow-green and blue-violet are complementary, and cyan-green and magenta are complementary. Complementary colors can create a mutual blocking effect.

[0113] For example, referring to Figure 5, when the color of the antireflection layer 7 is purplish, that is, the transmittance of the antireflection layer 7 for the red and blue bands is higher than that for the green band. In order to achieve the movement of the color point towards neutral black, the pixel definition layer 32 needs to use a green or blackish-green color. The reflected light from the first electrode 31 is used to compensate for the lack of green. Referring to Figures 1 and 6, in Figure 6, Gray CF is the transmittance curve of the antireflection layer 7 for each color of light, and Green PDL is the wavelength curve of the light reflected by the first electrode 31 when the green pixel definition layer 32 is set. After the ambient white light passes through the antireflection layer 7, it is filtered into three colors of light: red (thick dashed arrow in Figure 1), green (thin dashed arrow in Figure 1), and blue (solid arrow in Figure 1). Because the pixel definition layer 32 uses green, the red and blue light is absorbed by the green pixel definition layer 32, and the green light can be reflected by the first electrode 31 and then emitted through the first light-transmitting opening 61 to compensate for the lack of purplish color in the antireflection layer 7.

[0114] For example, referring to Figure 7, Gray CF is the transmittance curve of the antireflection layer 7 for various colors of light, and Yellow PDL is the wavelength curve of the light reflected by the first electrode 31 when the yellow pixel definition layer 32 is set. When the color of the antireflection layer 7 is bluish, that is, the transmittance of the antireflection layer 7 for the blue band is higher than that for the red and green bands. In order to achieve the movement of the color point towards neutral black, the pixel definition layer 32 needs to use a yellow or blackish-yellow color. The reflected light from the first electrode 31 is used to compensate for the lack of red and green. After the ambient white light passes through the antireflection layer 7, it is filtered into red, green and blue light. Because the pixel definition layer 32 uses yellow, the blue light is absorbed by the yellow pixel definition layer 32, and the red and green light can be reflected by the first electrode 31 and then emitted through the first light-transmitting opening 61 to compensate for the lack of bluish color of the antireflection layer 7.

[0115] When the color of the anti-reflection layer 7 is greenish, the color of the pixel definition layer 32 is purplish; when the color of the anti-reflection layer 7 is yellowish, the color of the pixel definition layer 32 is bluish; when the color of the anti-reflection layer 7 is cyan, the color of the pixel definition layer 32 is reddish; when the color of the anti-reflection layer 7 is reddish, the color of the pixel definition layer 32 is cyan; when the color of the anti-reflection layer 7 is neutral black, the color of the pixel definition layer 32 is neutral black or bluish.

[0116] When the pixel definition layer 32 is black, the total transmittance of light with wavelengths between 380nm and 780nm is <10%; when the pixel definition layer 32 is colored, the peak transmittance of each color in the pixel definition layer 32 is between 10% and 90%. Moreover, after the pixel definition layer 32 is colored, the display panel will selectively increase the transmittance of one or two of the three wavelengths of red, green, and blue, thereby improving light extraction efficiency and reducing power consumption.

[0117] Since the antireflection layer 7 has light transmission peaks in the red, green and blue bands of the spectrum, compared with display panels that use red, green and blue filter layers, the reflectivity of the display panel using the antireflection layer 7 will definitely be higher when both have the same transmittance. Therefore, the transmittance of the antireflection layer 7 will inevitably be reduced to improve the reflectivity.

[0118] Alternatively, in some exemplary embodiments of this disclosure, referring to FIG8, the display panel may further include a dimming layer 8, which may include a protrusion 81 located within the first light-transmitting opening 61. An antireflective layer 7 covers the dimming layer 8 such that a first recess 72 is provided on the side of the antireflective layer 7 closest to the dimming layer 8, and the protrusion 81 is located within the first recess 72. The refractive index of the dimming layer 8 is greater than that of the antireflective layer 7. This creates a refractive interface between the protrusion 81 and the first recess 72, allowing light emitted from the sub-pixel 35 to easily refract at the refractive interface, forming refracted light. Furthermore, the angle of refraction of the refracted light is greater than the angle of incidence of the incident light, resulting in more convergent refracted light. This improves the forward light emission efficiency of the display panel, compensating for the loss of transmittance of the low antireflective layer 7.

[0119] The distance between the sidewall of the protrusion 81 and the center of the sub-pixel 35 in the first direction X increases as the height of the sidewall of the protrusion 81 in the second direction Y decreases, so that the protrusion 81 forms a structure where the top is smaller than the bottom.

[0120] For example, as shown in Figures 8 and 9, the cross section of the protrusion 81 along the second direction Y can be trapezoidal or semicircular, semi-circular, semi-elliptical, semi-elliptical, etc., that is, the protrusion 81 can be a spherical cap structure, a frustum structure, an ellipsoidal cap structure, etc.

[0121] Alternatively, referring to FIG10, the protrusion 81 fills the first light-transmitting opening 61, and the height of the protrusion 81 in the second direction Y is greater than the height of the light-shielding layer 6 in the second direction Y. Specifically, the protrusion 81 may include a first part 811 and a second part 812. The height of the first part 811 in the second direction Y is equal to the depth of the first light-transmitting opening 61 in the second direction Y. The first part 811 fills the first light-transmitting opening 61, that is, the edge line of the orthographic projection of the first part 811 on the display back panel 10 coincides with the edge line of the orthographic projection of the first light-transmitting opening 61 on the display back panel 10. The second part 812 is connected to the side of the first part 811 away from the display back panel 10, so that the second part 812 protrudes from the light-shielding layer 6. The light emitted from the sub-pixel 35 can be refracted through the sidewall of the second part 812, and the refraction angle of the refracted light is greater than the incident angle of the incident light, so that the refracted light is more focused, thereby improving the forward light emission efficiency of the display panel to compensate for the loss of transmittance of the anti-reflection layer 7. This configuration increases the area of ​​the sidewalls of the second part 812, causing more oblique light rays emitted from the sub-pixel 35 to be refracted by the sidewalls of the second part 812, thereby further improving the forward light emission efficiency of the display panel to further compensate for the loss of transmittance of the low-reflection layer 7.

[0122] The distance between the sidewall of the second part 812 and the center of the sub-pixel 35 in the first direction X increases as the height of the sidewall of the second part 812 in the second direction Y decreases, so that the second part 812 forms a structure where the top is smaller than the bottom. For example, the cross-section of the second part 812 along the second direction Y can be a trapezoid or a rounded trapezoid, that is, the second part 812 can be a frustum structure, a truncated cone structure, etc.

[0123] The second part 812 has a height in the second direction Y that is greater than or equal to 1.0 micrometer and less than or equal to 4.0 micrometer. That is, the difference between the height of the protrusion 81 in the second direction Y and the height of the light-shielding layer 6 in the second direction Y is greater than or equal to 1.0 micrometer and less than or equal to 4.0 micrometer. For example, the difference between the height of the protrusion 81 in the second direction Y and the height of the light-shielding layer 6 in the second direction Y can be 1.3 micrometer, 1.5 micrometer, 1.8 micrometer, 2 micrometer, 2.2 micrometer, 2.5 micrometer, 2.7 micrometer, 3 micrometer, 3.3 micrometer, 3.5 micrometer, 3.8 micrometer, etc.

[0124] If the height of the second part 812 in the second direction Y is too small, the width of the sidewall of the second part 812 in the second direction Y will be too small, and it will not be able to refract enough oblique light, affecting the forward light emission efficiency of the display panel.

[0125] If the height of the second part 812 in the second direction Y is too large, it will be detrimental to the thinning and lightening of the display panel.

[0126] The above-mentioned numerical range not only ensures improved forward light emission efficiency of the display panel, but also facilitates the thinner and lighter design of the display panel.

[0127] The difference between the refractive index of the dimming layer 8 and the refractive index of the antireflection layer 7 is greater than or equal to 0.05. For example, the difference between the refractive index of the dimming layer 8 and the refractive index of the antireflection layer 7 can be 0.08, 1, 1.2, 1.5, 1.7, 2, etc.

[0128] If the difference between the refractive index of the dimming layer 8 and the refractive index of the antireflection layer 7 is too small, the difference between the refraction angle of the refracted light and the incident angle of the incident light will be too small, resulting in an insignificant light-converging effect and hindering the improvement of the forward light emission efficiency of the display panel.

[0129] If the difference between the refractive index of the dimming layer 8 and the refractive index of the antireflection layer 7 is too large, it will be detrimental to the selection of materials for the dimming layer 8 and the antireflection layer 7, and will increase costs.

[0130] The above-mentioned numerical range not only ensures the light-gathering effect to improve the forward light emission efficiency of the display panel, but also makes it easier to select materials for the dimming layer 8 and the anti-reflection layer 7 without increasing costs.

[0131] Alternatively, the refractive index of the dimming layer 8 may be greater than or equal to 1.6. For example, the refractive index of the dimming layer 8 may be 1.62, 1.65, 1.67, 1.7, 1.73, 1.75, 1.78, 1.8, 1.82, 1.85, 1.87, 1.9, etc.

[0132] The refractive index of the antireflection layer 7 is less than or equal to 1.7. For example, the refractive index of the antireflection layer 7 can be 1.4, 1.42, 1.45, 1.47, 1.4, 1.53, 1.55, 1.58, 1.5, 1.62, 1.65, 1.67, etc.

[0133] Referring to FIG11, in some other exemplary embodiments of this disclosure, the antireflection layer 7 may include antireflection portions 71. Specifically, the antireflection layer 7 may include a plurality of antireflection portions 71 spaced apart, i.e., there is no connection between adjacent antireflection portions 71. A portion of the antireflection portion 71 is located within the first light-transmitting opening 61. Specifically, the antireflection portion 71 fills the first light-transmitting opening 61, and the height of the antireflection portion 71 in the second direction Y is greater than the height of the light-shielding layer 6 in the second direction Y. For example, the anti-reflection section 71 may include a first anti-reflection section 711 and a second anti-reflection section 712. The height of the first anti-reflection section 711 in the second direction Y is equal to the depth of the first light-transmitting opening 61 in the second direction Y. The first anti-reflection section 711 fills the first light-transmitting opening 61, that is, the edge line of the orthographic projection of the first anti-reflection section 711 on the display back panel 10 coincides with the edge line of the orthographic projection of the first light-transmitting opening 61 on the display back panel 10. The second anti-reflection section 712 is connected to the side of the first anti-reflection section 711 away from the display back panel 10, so that the second anti-reflection section 712 protrudes from the light-shielding layer 6. The anti-reflection section 71 can reduce the reflection of ambient light by the display panel to ensure the anti-reflection effect of the anti-reflection layer 7.

[0134] The distance between the sidewall of the second anti-reflection portion 712 and the center of the sub-pixel 35 in the first direction X increases as the height of the sidewall of the second anti-reflection portion 712 decreases in the second direction Y, resulting in the second anti-reflection portion 712 having a structure where the top is smaller than the bottom. For example, the cross-section of the second anti-reflection portion 712 along the second direction Y can be trapezoidal or rounded trapezoidal, that is, the second anti-reflection portion 712 can be a frustum structure, a truncated cone structure, etc.

[0135] In this case, the display panel may further include a second planarization layer 9, which covers the antireflection layer 7. A second recess 91 is provided on the side of the second planarization layer 9 closest to the antireflection layer 7. A portion of the antireflection layer 71 is located within the second recess 91. The refractive index of the antireflection layer 7 is greater than that of the second planarization layer 9. This creates a refractive interface between the antireflection layer 71 and the second recess 91. Light emitted from the sub-pixel 35 is easily refracted at this interface, forming refracted light. Furthermore, the angle of refraction of the refracted light is greater than the angle of incidence of the incident light, resulting in more convergent refracted light. This improves the forward light emission efficiency of the display panel, compensating for the loss of transmittance of the second antireflection layer 7.

[0136] This configuration results in a larger sidewall area for the second antireflection layer 712, causing more oblique light rays emitted from the sub-pixel 35 to be refracted by the sidewall of the second antireflection layer 712, thereby further improving the forward light emission efficiency of the display panel and further compensating for the loss of transmittance of the antireflection layer 7.

[0137] The height of the second antireflection section 712 in the second direction Y is greater than or equal to 1.0 micrometer and less than or equal to 4.0 micrometer. That is, the difference between the height of the antireflection section 71 in the second direction Y and the height of the light-shielding layer 6 in the second direction Y is greater than or equal to 1.0 micrometer and less than or equal to 4.0 micrometer. For example, the difference between the height of the antireflection section 71 in the second direction Y and the height of the light-shielding layer 6 in the second direction Y can be 1.3 micrometer, 1.5 micrometer, 1.8 micrometer, 2 micrometer, 2.2 micrometer, 2.5 micrometer, 2.7 micrometer, 3 micrometer, 3.3 micrometer, 3.5 micrometer, 3.8 micrometer, etc.

[0138] If the height of the second anti-reflection part 712 in the second direction Y is too small, the width of the sidewall of the second anti-reflection part 712 in the second direction Y will be too small, and it will not be able to refract enough oblique light, affecting the forward light emission efficiency of the display panel.

[0139] If the height of the second anti-reflection section 712 in the second direction Y is too large, it will be detrimental to the thinning and lightening of the display panel.

[0140] The above-mentioned numerical range not only ensures improved forward light emission efficiency of the display panel, but also does not hinder the thinner and lighter design of the display panel.

[0141] The difference between the refractive index of the antireflection layer 7 and the refractive index of the second planarization layer 9 is greater than or equal to 0.05. For example, the difference between the refractive index of the antireflection layer 7 and the refractive index of the second planarization layer 9 can be 0.08, 1, 1.2, 1.5, 1.7, 2, etc.

[0142] If the difference between the refractive index of the antireflection layer 7 and the refractive index of the second planarization layer 9 is too small, the difference between the refraction angle of the refracted light and the incident angle of the incident light will be too small, resulting in an insignificant light-converging effect and hindering the improvement of the forward light emission efficiency of the display panel.

[0143] If the difference between the refractive index of the antireflection layer 7 and the refractive index of the second planarization layer 9 is too large, it will be detrimental to the selection of materials for the second planarization layer 9 and the antireflection layer 7, and will increase costs.

[0144] The above-mentioned numerical range not only ensures the light-gathering effect to improve the forward light emission efficiency of the display panel, but also makes it easier to select materials for the second planarization layer 9 and the anti-reflection layer 7 without increasing costs.

[0145] Alternatively, the refractive index of the antireflection layer 7 may be greater than or equal to 1.6. For example, the refractive index of the antireflection layer 7 may be 1.62, 1.65, 1.67, 1.7, 1.73, 1.75, 1.78, 1.8, 1.82, 1.85, 1.87, 1.9, etc.

[0146] The refractive index of the second planarization layer 9 is less than or equal to 1.7. For example, the refractive index of the second planarization layer 9 can be 1.4, 1.42, 1.45, 1.47, 1.4, 1.53, 1.55, 1.58, 1.5, 1.62, 1.65, 1.67, etc.

[0147] Referring to Figure 1, for example, ambient white light is filtered into red, green and blue light after passing through the anti-reflection layer 7. Because the pixel definition layer 32 is green, the red and blue light is absorbed by the green pixel definition layer 32, and the green light is reflected by the first electrode 31 and then emitted through the first light-transmitting opening 61, thus compensating for the lack of purple color in the anti-reflection layer 7.

[0148] Referring to Figure 12, the orthographic projection of the first light-transmitting opening 61 on the display back panel 10 is located within the first electrode 31. For example, the edge line of the orthographic projection of the first light-transmitting opening 61 on the display back panel 10 may coincide with the edge line of the first electrode 31, or the first electrode 31 may cover and be larger than the orthographic projection of the first light-transmitting opening 61 on the display back panel 10. In other words, by setting the first electrode 31 to be relatively large, more green light is reflected by the first electrode 31, further compensating for the purplish tint of the anti-reflection layer 7. Of course, in some other exemplary embodiments of this disclosure, the first electrode 31 is set relatively large, resulting in more light being reflected by the first electrode 31, further compensating for the color cast of the anti-reflection layer 7.

[0149] Furthermore, the orthographic projection of the first light-transmitting opening 61 on the display back panel 10 is located within the first electrode 31. This ensures that the edge of the orthographic projection of the light-shielding layer 6 on the display back panel 10 coincides with the edge of the first electrode 31, or that the edge of the orthographic projection of the light-shielding layer 6 on the display back panel 10 overlaps with the edge of the first electrode 31. Thus, the light-shielding layer 6 and the first electrode 31 can block ambient light. In other words, most of the ambient light entering the display back panel 10 through the first light-transmitting opening 61 will be blocked by the first electrode 31, preventing ambient light from reaching the driving circuit and thus avoiding any impact on the characteristics of the thin-film transistor and the display quality of the display device.

[0150] Of course, in some other exemplary embodiments of this disclosure, the first electrode 31 may be located within the orthographic projection of the first light-transmitting opening 61 on the display back panel 10, that is, the orthographic projection of the first light-transmitting opening 61 on the display back panel 10 covers and is larger than the first electrode 31. The first electrode 31 can reflect a portion of the green light, which can compensate for the purple tint of the antireflective layer 7.

[0151] Referring to Figures 13 and 14, the distance between the sidewall of the pixel opening 321 and the center of the sub-pixel 35 in the first direction X decreases as the height of the sidewall of the pixel opening 321 in the second direction Y decreases, resulting in a structure where the opening of the pixel opening 321 is larger than its bottom. For example, the cross-section of the pixel opening 321 along the second direction Y can be trapezoidal or rounded trapezoidal. Since the color of the pixel definition layer 32 and the color of the anti-reflection layer 7 are complementary colors, the sidewall of the pixel opening 321 in the pixel definition layer will reflect the incident ambient light (indicated by the dashed arrow in the figure), resulting in a large halo phenomenon.

[0152] In some exemplary embodiments of this disclosure, the orthographic projection of the light-shielding layer 6 on the display back panel 10 overlaps with the sidewall of the pixel opening 321, so that a portion of the orthographic projection of the first light-transmitting opening 61 on the display back panel 10 overlaps with a portion of the pixel opening 321. The light-shielding layer 6 can block a portion of the ambient light, preventing this portion of the ambient light from reaching the sidewall of the pixel opening 321, thereby reducing the large halo phenomenon.

[0153] Alternatively, the orthographic projection of the light-shielding layer 6 on the display back panel 10 completely covers the sidewall of the pixel opening 321, so that the orthographic projection of the first light-transmitting opening 61 on the display back panel 10 is located inside the pixel opening 321. The light-shielding layer 6 can block most of the ambient light, so that the ambient light cannot reach the sidewall of the pixel opening 321, thereby reducing or even avoiding the large halo phenomenon.

[0154] Alternatively, referring to Figures 13 and 14, the light-shielding layer 6 may include a first light-shielding portion 62 and a second light-shielding portion 63; the first light-shielding portion 62 is provided with a second light-transmitting opening 621. The second light-shielding portion 63 is located inside the second light-transmitting opening 621, and the second light-shielding portion 63 is annular. The shape of the second light-shielding portion 63 is the same as the shape of the second light-transmitting opening 621. For example, the second light-transmitting opening 621 is circular, and the second light-shielding portion 63 is annular; the second light-transmitting opening 621 is rectangular, and the second light-shielding portion 63 is a rectangular ring; the second light-transmitting opening 621 is elliptical, and the second light-shielding portion 63 is an elliptical ring. The inner ring of the second light-shielding part 63 is the first light-transmitting opening 61, and the inner ring surface of the second light-shielding part 63 is the sidewall of the first light-transmitting opening 61. The orthographic projection of the second light-shielding part 63 on the display back panel 10 at least partially overlaps with the sidewall of the pixel opening 321. For example, the edge line of the orthographic projection of the second light-shielding part 63 on the display back panel 10 may coincide with the edge line of the sidewall of the pixel opening 321, that is, the ring width of the second light-shielding part 63 in the first direction X is equal to the ring width of the sidewall of the pixel opening 321 in the first direction X. Alternatively, the orthographic projection of the second light-shielding part 63 on the display back panel 10 may cover and protrude from the sidewall of the pixel opening 321. In both cases, the orthographic projection of the second light-shielding part 63 on the display back panel 10 completely covers the sidewall of the pixel opening 321. The second light-shielding part 63 can block most of the ambient light, preventing ambient light from reaching the sidewall of the pixel opening 321, thereby reducing or even avoiding the large halo phenomenon.

[0155] Of course, in some other exemplary embodiments of this disclosure, a portion of the orthographic projection of the second light-shielding part 63 on the display back panel 10 may overlap with a portion of the sidewall of the pixel opening 321. The second light-shielding part 63 can block a portion of the ambient light, preventing this portion of the ambient light from reaching the sidewall of the pixel opening 321, thereby reducing the large halo phenomenon.

[0156] The second light-shielding part 63 is spaced apart from the first light-shielding part 62, meaning there is no connection between the second light-shielding part 63 and the first light-shielding part 62. This creates an annular gap between the second light-shielding part 63 and the first light-shielding part 62, allowing light emitted from the sub-pixel 35 to pass through the annular gap between the second light-shielding part 63 and the first light-shielding part 62, thus minimizing the reduction in aperture ratio due to the second light-shielding part 63. Furthermore, the annular gap can expand the viewing angle of the emitted light, thereby expanding the viewing angle of the display panel.

[0157] Referring to Figure 1, ambient white light is filtered into red, green, and blue light after passing through the anti-reflection layer 7. Because the pixel definition layer 32 uses a colored material, it absorbs a portion of the red, green, and blue light. The remaining light passes through the pixel definition layer 32 and the first planarization layer 28 to the driving circuit. The light entering the active layer of the driving circuit generates photogenerated carriers, which significantly affects the characteristics of the thin-film transistors and ultimately the display quality of the display device. The color of the light passing through the pixel definition layer 32 is the same as the color of the pixel definition layer 32. For example, as indicated by the thin dashed arrow in Figure 1, when the pixel definition layer 32 is green, red and blue light are absorbed by the green pixel definition layer 32, while green light can pass through the green pixel definition layer 32 to the driving circuit.

[0158] In some exemplary embodiments of this disclosure, the color of the first planarization layer 28 is different from the color of the pixel definition layer 32. This causes light passing through the pixel definition layer 32 to be absorbed by the first planarization layer 28, preventing it from reaching the driving circuit. This avoids affecting the characteristics of the thin-film transistor and thus the display quality of the display device. Taking a green pixel definition layer 32 as an example, green light can pass through it, but because the color of the first planarization layer 28 is different from that of the pixel definition layer 32, the green light is absorbed by the first planarization layer 28 and cannot reach the driving circuit.

[0159] Alternatively, the color of the first planarization layer 28 and the color of the pixel definition layer 32 are complementary colors, which further prevents light passing through the pixel definition layer 32 from passing through the first planarization layer 28 and thus prevents it from reaching the driving circuit, thereby avoiding affecting the characteristics of the thin film transistor and avoiding affecting the display quality of the display device.

[0160] Referring to Figures 15 and 16, in some exemplary embodiments of this disclosure, multiple pixel openings 321 and multiple first light-transmitting openings 61 are provided; the display panel may also include a transparent filling layer 11, which may include multiple filling portions 111. At least some of the first light-transmitting openings 61 are provided with filling portions 111. For example, filling portions 111 may be provided in all of the first light-transmitting openings 61, or filling portions 111 may be provided in some of the first light-transmitting openings 61, while no filling portions 111 are provided in other parts of the first light-transmitting openings 61.

[0161] The thickness of the filling part 111 in the second direction Y is inversely proportional to the opening area of ​​the first light-transmitting opening 61. That is, the smaller the opening area of ​​the first light-transmitting opening 61, the thicker the filling part 111 in the second direction Y; the larger the opening area of ​​the first light-transmitting opening 61, the smaller the thickness of the filling part 111 in the second direction Y. The thickness of the filling part 111 in the second direction Y can be reduced to zero, so that no filling part 111 is provided in a part of the first light-transmitting opening 61.

[0162] The transparent filler layer 11 can be made of transparent resin, such as silicone resin, acrylic resin, polyvinyl alcohol, polyimide, etc.

[0163] Since the transparent filler layer 11 is formed by coating and then leveling, it is not easy to level at the first light-transmitting opening 61 with a larger opening area, and it is easy to form a concave structure, resulting in a thinner anti-reflection layer 7 at the first light-transmitting opening 61 with a larger opening area; while it is easy to level at the first light-transmitting opening 61 with a smaller opening area, and it is not easy to form a concave structure, resulting in a thicker anti-reflection layer 7 at the first light-transmitting opening 61 with a smaller opening area.

[0164] The above configuration results in a greater reduction in the thickness of the antireflection layer 7 at the first light-transmitting opening 61 with a smaller opening area, thereby making the thickness of the antireflection layer 7 at each first light-transmitting opening 61 basically the same, so as to ensure that the antireflection effect of the antireflection layer 7 on each pixel is basically consistent and to avoid color shift defects.

[0165] The plurality of pixel openings 321 may include a first sub-pixel opening 321a, a second sub-pixel opening 321b, and a third sub-pixel opening 321c. The light-emitting layer group 33 in the first sub-pixel opening 321a forms a first sub-pixel 351, the light-emitting layer group 33 in the second sub-pixel opening 321b forms a second sub-pixel 352, and the light-emitting layer group 33 in the third sub-pixel opening 321c forms a third sub-pixel 353. The plurality of first light-transmitting openings 61 may include a first sub-light-transmitting opening 61a, a second sub-light-transmitting opening 61b, and a third sub-light-transmitting opening 61c.

[0166] In the second direction Y, the first sub-pixel opening 321a and the first sub-light-transmitting opening 61a are arranged opposite each other, that is, the orthographic projection of the first sub-light-transmitting opening 61a on the display back panel 10 at least partially overlaps with the first sub-pixel opening 321a. The second sub-pixel opening 321b and the second sub-light-transmitting opening 61b are arranged opposite each other, that is, the orthographic projection of the second sub-light-transmitting opening 61b on the display back panel 10 at least partially overlaps with the second sub-pixel opening 321b. The third sub-pixel opening 321c and the third sub-light-transmitting opening 61c are arranged opposite each other, that is, the orthographic projection of the third sub-light-transmitting opening 61c on the display back panel 10 at least partially overlaps with the third sub-pixel opening 321c.

[0167] The opening area of ​​the first sub-light-transmitting opening 61a is smaller than the opening area of ​​the second sub-light-transmitting opening 61b, and the opening area of ​​the second sub-light-transmitting opening 61b is smaller than the opening area of ​​the third sub-light-transmitting opening 61c. That is, the opening areas of the first sub-light-transmitting opening 61a, the second sub-light-transmitting opening 61b, and the third sub-light-transmitting opening 61c increase sequentially.

[0168] In this case, the multiple filling portions 111 may include a first filling portion 111a and a second filling portion 111b. The first filling portion 111a is disposed within the first sub-light-transmitting opening 61a, and the second filling portion 111b is disposed within the second sub-light-transmitting opening 61b. That is, no filling portion 111 is disposed within the third sub-light-transmitting opening 61c, which has the largest opening area. In the second direction Y, the thickness of the first filling portion 111a is greater than the thickness of the second filling portion 111b.

[0169] This configuration ensures that the thickness of the antireflection layer 7 remains constant at the third sub-light-transmitting opening 61c, which has the largest opening area, while the thickness of the antireflection layer 7 is reduced the most at the first sub-light-transmitting opening 61a, which has the smallest opening area. The thickness of the antireflection layer 7 at the second sub-light-transmitting opening 61b, which has a medium opening area, is reduced in a moderate manner. This makes the thickness of the antireflection layer 7 at the first sub-light-transmitting opening 61a, the second sub-light-transmitting opening 61b, and the third sub-light-transmitting opening 61c basically the same, so as to ensure that the antireflection effect of the antireflection layer 7 on each pixel is basically consistent and to avoid color shift defects.

[0170] Referring to FIG17, the transparent filler layer 11 can be formed by a halftone (HT) process. Specifically, a transparent filler material layer 11a is formed on the side of the light-shielding layer 6 facing away from the display back panel 10. A halftone mask (HTM) is provided on the side of the transparent filler material layer 11a facing away from the display back panel 10. The halftone mask (HTM) may include a light-transmitting portion (HTMT), an opaque portion (HTMN), and a semi-transparent portion (HTMB). The transparent filler material layer 11a is formed by an exposure and development process. The transparent filler material layer 11a opposite to the opaque portion (HTMN) is completely removed, the transparent filler material layer 11a opposite to the light-transmitting portion (HTMT) retains its original thickness, and the transparent filler material layer 11a opposite to the semi-transparent portion (HTMB) is thinned, that is, a portion of the thickness of the transparent filler material layer 11a is removed. Then, the remaining transparent filler material layer 11a is ashed, so that the remaining transparent filler material layer 11a is thinned to a substantially equal thickness to form the first filler portion 111a and the second filler portion 111b.

[0171] In some exemplary embodiments of this disclosure, referring to Figures 1 and 8-15, the display panel may further include a touch layer group 5, which is disposed between the display back panel 10 and the light-shielding layer 6. Specifically, the touch layer group 5 is disposed on the side of the encapsulation layer group 4 away from the substrate 1, and the light-shielding layer 6 is disposed on the side of the touch layer group 5 away from the substrate 1, that is, the touch layer group 5 is disposed on the light-emitting side of the display back panel 10. The touch layer group 5 enables the display panel to realize touch function.

[0172] Specifically, the touch layer group 5 may include a base layer 51, a first touch functional layer 52, a touch insulating layer 53, and a second touch functional layer 54. The base layer 51 is disposed on the light-emitting side of the display back panel 10. Specifically, the base layer 51 is disposed on the side of the encapsulation layer group 4 away from the substrate 1. The first touch functional layer 52 is disposed on the side of the base layer 51 away from the display back panel 10. The touch insulating layer 53 is disposed on the side of the first touch functional layer 52 away from the display back panel 10. The second touch functional layer 54 is disposed on the side of the touch insulating layer 53 away from the display back panel 10. The light-shielding layer 6 covers the second touch functional layer 54, that is, the light-shielding layer 6 is in direct contact with the second touch functional layer 54. The light-shielding layer 6 can protect the second touch functional layer 54, eliminating the organic or inorganic insulating layer between the light-shielding layer 6 and the second touch functional layer 54 in the prior art, reducing the first film layer formation process, and thinning the display panel, which is beneficial for lightweight and thin design.

[0173] Generally, the second touch function layer 54 may include multiple touch electrodes arranged in an array, and the first touch function layer 52 may include multiple bridging portions. The bridging portions can connect a portion of two adjacent touch electrodes through the connection vias provided on the touch insulating layer 53.

[0174] It should be noted that in this disclosure, the first direction X is parallel to the display back panel 10. Specifically, the first direction X is parallel to the side of the display back panel 10 where the light-shielding layer 6 is disposed; the second direction Y is perpendicular to the display back panel 10. Specifically, the second direction Y is perpendicular to the side of the display back panel 10 where the light-shielding layer 6 is disposed, so that the first direction X and the second direction Y are set perpendicularly.

[0175] Based on the same inventive concept, this disclosure provides a display device that may include the display panel described in any of the above-described embodiments. The specific structure of the display panel has been described in detail above, and therefore will not be repeated here.

[0176] The specific type of display device is not particularly limited; any type of display device commonly used in the field is acceptable, such as mobile devices like mobile phones, wearable devices like watches, VR devices, etc. Those skilled in the art can make the appropriate selection based on the specific purpose of the display device, which will not be elaborated further here.

[0177] It should be noted that, in addition to the display panel, the display device also includes other necessary components and parts. Taking the monitor as an example, these include, for instance, the casing, circuit board, power cord, etc. Those skilled in the art can supplement these components according to the specific usage requirements of the display device, and will not be elaborated here.

[0178] Compared with the prior art, the beneficial effects of the display device provided by the example embodiments of the present invention are the same as the beneficial effects of the display panel provided by the example embodiments described above, and will not be repeated here.

[0179] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A display panel, wherein, include: The display back panel includes a pixel definition layer, on which pixel openings are provided; A light-shielding layer is disposed on the display side of the display back panel, and a first light-transmitting opening is provided on the light-shielding layer. The orthographic projection of the first light-transmitting opening on the display back panel at least partially overlaps with the pixel opening. An anti-reflection layer is disposed on the side of the light-shielding layer opposite to the display back panel, and the orthographic projection of the anti-reflection layer on the display back panel at least covers the orthographic projection of the first light-transmitting opening on the display back panel. The hue coordinates of the antireflection layer are (a g b g The hue coordinates of the pixel definition layer are (a b b b ), when a g ≤0, b g If a ≤ 0, then a b ≥0, b b ≥0; when a g ≥0, b g If a ≤ 0, then a b ≤0, b b ≥0; when a g ≥0, b g If a ≥ 0, then a b ≤0, b b ≤0; when a g ≤0, b g If a ≥ 0, then a b ≥0, b b ≤0; And a g With b g a is not zero at the same time b With b b a is not zero at the same time g With b b a is not zero at the same time b With b g They are not both zero at the same time.

2. The display panel according to claim 1, wherein, -70<a g +a b <70,-70<b g +b b <70。 3. The display panel according to claim 1, wherein, -30<a g +a b <30,-30<b g +b b <30。 4. The display panel according to claim 1, wherein, -10<a g +a b <10,-10<b g +b b <10。 5. The display panel according to claim 1, wherein, The color of the anti-reflection layer is complementary to the color of the pixel definition layer.

6. The display panel according to any one of claims 1 to 5, wherein, The display panel also includes: A dimming layer includes a protrusion located within a first light-transmitting opening. An antireflective layer covers the dimming layer such that a first recess is provided on the side of the antireflective layer closest to the dimming layer. The protrusion is located within the first recess. The refractive index of the dimming layer is greater than that of the antireflective layer.

7. The display panel according to claim 6, wherein, The protrusion fills the first light-transmitting opening, and the height of the protrusion in the second direction is greater than the height of the light-shielding layer in the second direction, the second direction being perpendicular to the side of the display back panel where the light-shielding layer is disposed.

8. The display panel according to claim 6, wherein, The difference between the refractive index of the dimming layer and the refractive index of the antireflective layer is greater than or equal to 0.

05.

9. The display panel according to any one of claims 1 to 5, wherein, The anti-reflection layer includes an anti-reflection portion that fills the first light-transmitting opening, and the height of the anti-reflection portion in the second direction is greater than the height of the light-shielding layer in the second direction. The second direction is perpendicular to the side of the display back panel on which the light-shielding layer is disposed. The display panel also includes: A second planarization layer covers the antireflection layer such that a second recess is provided on the side of the second planarization layer close to the antireflection layer, a portion of the antireflection portion is located within the second recess, and the refractive index of the antireflection layer is greater than the refractive index of the second planarization layer.

10. The display panel according to claim 9, wherein, The difference between the refractive index of the antireflection layer and the refractive index of the second planarization layer is greater than or equal to 0.

05.

11. The display panel according to any one of claims 1 to 5, wherein, The display back panel includes: The first electrode, the pixel definition layer is disposed on one side of the first electrode, the pixel opening is connected to the first electrode, and the orthographic projection of the first light-transmitting opening on the display back panel is located inside the first electrode; A light-emitting layer group is disposed at least within the pixel opening; The second electrode is disposed on the side of the light-emitting layer group opposite to the first electrode.

12. The display panel according to any one of claims 1 to 5, wherein, The light-shielding layer overlaps with the sidewall of the pixel opening on the display back panel.

13. The display panel according to claim 12, wherein, The light-shielding layer includes: A first light-shielding part, wherein a second light-transmitting opening is provided on the first light-shielding part; The second light-shielding part is configured as a ring, located inside the second light-transmitting opening and spaced apart from the first light-shielding part. The inner ring of the second light-shielding part is the first light-transmitting opening, and the orthographic projection of the second light-shielding part on the display back panel at least partially overlaps with the sidewall of the pixel opening.

14. The display panel according to claim 13, wherein, The second light-shielding part, when projected onto the display back panel, completely covers the sidewall of the pixel opening.

15. The display panel according to any one of claims 1 to 5, wherein, The display back panel also includes: The driving substrate includes multiple driving circuits arranged in an array and a first planarization layer. The first planarization layer is disposed on the side of the driving circuits close to the pixel definition layer, and the color of the first planarization layer is different from the color of the pixel definition layer.

16. The display panel according to claim 15, wherein, The color of the first planarization layer is complementary to the color of the pixel definition layer.

17. The display panel according to any one of claims 1 to 5, wherein, The pixel openings are configured in multiple ways, and the first light-transmitting opening is configured in multiple ways; the display panel further includes: The transparent filling layer includes multiple filling portions, at least a portion of which is disposed within the first light-transmitting opening. The thickness of the filling portion in a second direction is inversely proportional to the opening area of ​​the first light-transmitting opening. The second direction is perpendicular to the side of the display back panel where the light-shielding layer is disposed.

18. The display panel according to claim 17, wherein, The plurality of pixel openings include a first sub-pixel opening, a second sub-pixel opening, and a third sub-pixel opening. The plurality of first light-transmitting openings include a first sub-light-transmitting opening, a second sub-light-transmitting opening, and a third sub-light-transmitting opening. The orthographic projection of the first sub-light-transmitting opening on the display back panel at least partially overlaps with the first sub-pixel opening. The orthographic projection of the second sub-light-transmitting opening on the display back panel at least partially overlaps with the third sub-pixel opening. The plurality of filling portions include a first filling portion and a second filling portion. The first filling portion is disposed within the first sub-light-transmitting opening, and the second filling portion is disposed within the second sub-light-transmitting opening. The opening area of ​​the first sub-light-transmitting opening is smaller than the opening area of ​​the second sub-light-transmitting opening, and the opening area of ​​the second sub-light-transmitting opening is smaller than the opening area of ​​the third sub-light-transmitting opening. In the second direction, the thickness of the first filling portion is greater than the thickness of the second filling portion.

19. The display panel according to any one of claims 1 to 5, wherein, The display panel further includes a touch layer assembly, which is disposed between the display back panel and the light-shielding layer; the touch layer assembly includes: A base layer is disposed on the light-emitting side of the display back panel; The first touch function layer is located on the side of the base layer opposite to the display back panel; A touch-insulating layer is disposed on the side of the first touch function layer opposite to the display back panel; The second touch function layer is disposed on the side of the touch insulating layer opposite to the display back panel, and the light-shielding layer covers the second touch function layer.

20. A display device, wherein, include: The display panel is the display panel described in any one of claims 1 to 19.

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