Display panel and display device

Abstract

A display panel and a display device. The display panel comprises: a display backplane (10), which comprises a first sub-pixel (35R), a second sub-pixel (35G) and a third sub-pixel (35B); and three filter layers (6), which are stacked on a display side of the display backplane, wherein the three filter layers include a first filter layer (6R), a second filter layer (6B) and a third filter layer (6G). The orthographic projection of the first filter layer on the display backplane overlaps the first sub-pixel, and the first filter layer is provided with a first opening (6R1) and a second opening (6R2), wherein the orthographic projection of the first opening on the display backplane overlaps the second sub-pixel, and the orthographic projection of the second opening on the display backplane overlaps the third sub-pixel. The orthographic projection of the second filter layer on the display backplane overlaps the third sub-pixel, and the second filter layer is provided with a third opening (6B1) and a fourth opening (6B2), wherein the orthographic projection of the third opening on the display backplane overlaps the first sub-pixel, and the orthographic projection of the fourth opening on the display backplane overlaps the second sub-pixel. The third filter layer comprises a plurality of third filter portions (6G1) arranged at intervals, wherein the orthographic projection of each third filter portion on the display backplane overlaps the second sub-pixel.

Description

Display panel and display device TECHNICAL FIELD

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

[0002] With the continuous development of display technology, COE (Color Film on Encapsulation) technology is gradually applied to OLED (Organic Light Emitting Display) to optimize the light transmittance of the display panel, reduce the working power consumption of the display panel, improve the flatness of the display panel, and improve the overall quality of the display panel.

[0003] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art.

[0004] SUMMARY

[0005] The present disclosure provides a display panel and a display device.

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

[0007] a display backplane comprising a first sub-pixel, a second sub-pixel, and a third sub-pixel;

[0008] a three-layer filter layer stacked on the display side of the display backplane; the three-layer filter layer comprises a first filter layer, a second filter layer, and a third filter layer; the orthographic projection of the first filter layer on the display backplane at least partially overlaps the first sub-pixel, the first filter layer is provided with a first opening and a second opening, the orthographic projection of the first opening on the display backplane at least partially overlaps the second sub-pixel, and the orthographic projection of the second opening on the display backplane at least partially overlaps the third sub-pixel; the orthographic projection of the second filter layer on the display backplane at least partially overlaps the third sub-pixel, the second filter layer is provided with a third opening and a fourth opening, the orthographic projection of the third opening on the display backplane at least partially overlaps the first sub-pixel, and the orthographic projection of the fourth opening on the display backplane at least partially overlaps the second sub-pixel; the third filter layer comprises a plurality of third filter portions arranged at intervals, and the orthographic projection of the third filter portion on the display backplane at least partially overlaps the second sub-pixel.

[0009] In an example embodiment of the present disclosure, a projection of the first opening on the display backplane is located within a projection of the fourth opening on the display backplane, and a projection of the fourth opening on the display backplane is located within a projection of the third filter on the display backplane; or, a projection of the fourth opening on the display backplane is located within a projection of the first opening on the display backplane, and a projection of the first opening on the display backplane is located within a projection of the third filter on the display backplane; and a first non-zero spacing exists between an edge line of the projection of the first opening on the display backplane and an edge line of the projection of the fourth opening on the display backplane.

[0010] In an example embodiment of the present disclosure, the first non-zero spacing is greater than or equal to 1 micrometer and less than or equal to 10 micrometers.

[0011] In an example embodiment of the present disclosure, a second non-zero spacing exists between an edge line of the projection of the fourth opening on the display backplane and an edge line of the projection of the third filter on the display backplane, or, a second non-zero spacing exists between an edge line of the projection of the first opening on the display backplane and an edge line of the projection of the third filter on the display backplane.

[0012] In an example embodiment of the present disclosure, the second non-zero spacing is greater than or equal to 0.5 micrometer.

[0013] In an example embodiment of the present disclosure, in a first direction parallel to the display backplane, the third filter extends to an edge of the third opening adjacent to the third filter, and / or the third filter extends to an edge of the second opening adjacent to the third filter.

[0014] In an example embodiment of the present disclosure, a recess is provided on a side of the display backplane close to the filter layer, and a projection of the third filter on the display backplane at least partially overlaps the recess.

[0015] In an example embodiment of the present disclosure, a projection of the third filter on the display backplane is located within the recess, or the recess is provided in a ring shape, an edge of the projection of the third filter on the display backplane overlaps the recess, and a side wall of the first opening or a side wall of the fourth opening coincides with an inner ring surface of the recess.

[0016] In an example embodiment of the present disclosure, a depth of the recess is equal to a thickness of the filter layer closest to the display backplane, or a depth of the recess is equal to a thickness of the third filter.

[0017] In an example embodiment of the present disclosure, in a first direction, the recess extends to the edge of the third opening adjacent to the second opening, and / or the recess extends to the edge of the second opening adjacent to the third opening, the first direction being parallel to the display backplane.

[0018] In an example embodiment of the present disclosure, the first filter layer is a red filter layer, the second filter layer is a blue filter layer, and the third filter layer is a green filter layer.

[0019] In an example embodiment of the present disclosure, the first sub-pixel is a red sub-pixel, the second sub-pixel is a green sub-pixel, and the third sub-pixel is a blue sub-pixel.

[0020] In an example embodiment of the present disclosure, the first filter layer is arranged on the display side of the display backplane, the second filter layer is arranged on the side of the first filter layer away from the display backplane, and the third filter layer is arranged on the side of the second filter layer away from the display backplane.

[0021] In an example embodiment of the present disclosure, the fourth opening covers and is larger than the orthographic projection of the first opening on the display backplane, so that the fourth opening and the first opening combine to form an opening part of a stepped structure.

[0022] In an example embodiment of the present disclosure, the first filter layer and the third filter layer are arranged between the second filter layer and the display backplane.

[0023] In an example embodiment of the present disclosure, the first filter layer is arranged on the display side of the display backplane, the third filter layer is arranged on the side of the first filter layer away from the display backplane, and the second filter layer is arranged on the side of the third filter layer away from the display backplane.

[0024] Alternatively, the third filter layer is arranged on the display side of the display backplane, the first filter layer is arranged on the side of the third filter layer away from the display backplane, and the second filter layer is arranged on the side of the first filter layer away from the display backplane.

[0025] In an example embodiment of the present disclosure, the first filter layer is entirely covered by the second filter layer except at the third opening.

[0026] In an example embodiment of the present disclosure, the thickness of the first filter layer is greater than or equal to 1.5 microns and less than or equal to 4.5 microns, the thickness of the second filter layer is greater than or equal to 1.5 microns and less than or equal to 4.5 microns, and the thickness of the third filter layer is greater than or equal to 1.5 microns and less than or equal to 4.5 microns.

[0027] In an example embodiment of the present disclosure, the first filter layer has a thickness less than 2 microns.

[0028] In an example embodiment of the present disclosure, the first sub-pixel is located within the orthographic projection of the first filter layer on the display backplane, the second sub-pixel is located within the orthographic projection of the first opening on the display backplane, and the third sub-pixel is located within the orthographic projection of the second opening on the display backplane; the third sub-pixel is located within the orthographic projection of the second filter layer on the display backplane, the first sub-pixel is located within the orthographic projection of the third opening on the display backplane, and the second sub-pixel is located within the orthographic projection of the fourth opening on the display backplane; and the second sub-pixel is located within the orthographic projection of the third filter layer on the display backplane.

[0029] According to another aspect of the present disclosure, there is provided a display device comprising:

[0030] The display panel is any one described above.

[0031] It should be understood that the general description above and the following detailed description are only exemplary and explanatory, and are not intended to limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and serve to explain the principles of the present disclosure. It is readily apparent to one of ordinary skill in the art that the accompanying drawings are merely exemplary of embodiments of the present disclosure and are therefore not intended to limit the scope of the present disclosure.

[0033] FIG. 1 is a structural schematic diagram of a first example embodiment of a display panel of the present disclosure.

[0034] FIG. 2 is a structural schematic diagram of a display backplane in FIG. 1.

[0035] FIG. 3 is a structural schematic diagram of a first filter layer in FIG. 1 in cooperation with each sub-pixel in the display backplane.

[0036] FIG. 4 is a structural schematic diagram of a second filter layer in FIG. 1 in cooperation with each sub-pixel in the display backplane.

[0037] FIG. 5 is a structural schematic diagram of a third filter layer in FIG. 1 in cooperation with each sub-pixel in the display backplane.

[0038] FIG. 6 is a structural schematic diagram of the first filter layer, the second filter layer, and the third filter layer in FIG. 1 in cooperation with each sub-pixel in the display backplane.

[0039] FIG. 7 is a structural schematic diagram of a specific display panel in FIG. 1.

[0040] FIG. 8 is a structural schematic diagram of a second example embodiment of a display panel of the present disclosure.

[0041] FIG. 9 is a structural schematic diagram of a third example embodiment of a display panel of the present disclosure.

[0042] FIG. 10 is a structural schematic diagram of a fourth example embodiment of a display panel of the present disclosure.

[0043] FIG. 11 is a structural schematic diagram of a fifth example embodiment of a display panel of the present disclosure.

[0044] FIG. 12 is a structural schematic diagram of a sixth example embodiment of a display panel of the present disclosure.

[0045] FIG. 13 is a structural schematic diagram of a seventh example embodiment of a display panel of the present disclosure.

[0046] FIG. 14 is a structural schematic diagram of an eighth example embodiment of a display panel of the present disclosure.

[0047] FIG. 15 is a structural schematic diagram of a ninth example embodiment of a display panel of the present disclosure.

[0048] BRIEF DESCRIPTION OF THE DRAWINGS 10, display backplane; 101, recessed portion; 1, substrate substrate; 2, drive substrate; 21, shielding layer; 22, buffer layer; 231, channel portion; 232, source connection portion; 233, drain connection portion; 24, gate insulating layer; 25, gate electrode layer; 251, gate electrode; 26, interlayer dielectric layer; 27, first connection conductor layer; 271, source electrode; 272, drain electrode; 28, first planarization layer; 3, light-emitting substrate; 31, first electrode; 32, pixel definition layer; 33, light-emitting layer group; 34, second electrode; 35, sub-pixel; 35R, first sub-pixel; 35G, second sub-pixel; 35B, third sub-pixel; 4, encapsulation layer group; 5, touch layer group; 51, base layer; 52, first touch functional layer; 53, touch insulating layer; 54, second touch functional layer; 55, protective layer; 6, filter layer; 6R, first filter layer; 6R1, first opening; 6R2, second opening; 6B, second filter layer; 6B1, third opening; 6B2, fourth opening; 6G, third filter layer; 6G1, third filter portion; 7, second planarization layer; 8, adhesive layer; 9, cover plate; X, first direction. DETAILED DESCRIPTION

[0049] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations can be implemented in any number of manners, and are not limited to the example implementations described herein; rather, examples implementations should be understood as illustrative in nature. Like reference numerals refer to like elements throughout the drawings, and detailed descriptions of the drawings are omitted for brevity. Further, the drawings are not necessarily drawn to scale.

[0050] Although relative terms such as "upper", "lower", etc. are used herein to describe one component's relationship to another component of the icon, these terms are used herein for convenience only and are not limiting of the icon's orientation. It will be understood that if the icon's device is turned over, the component described as being "upper" will then be "lower". When a structure is "on" another structure, it can mean that the structure is formed integrally with the other structure or that the structure is "directly" on the other structure or that the structure is "indirectly" on the other structure with intervening structures therebetween.

[0051] The terms "one", "a", "an", "the", and "at least one" are used to mean one or more elements / components / etc.; the terms "comprising" and "having" are used to mean including, but not limited to, the listed elements / components / etc.; the term "first", "second", and "third" etc. are used to mean different or separate elements / components / etc. and not by magnitude or time.

[0052] In the present application, unless specifically stated and limited otherwise, the term "connected" is used broadly and encompasses direct and indirect connections, fixed and removable connections, and one-piece and multiple-piece connections. The term "and / or" is used to mean that the associated objects are either individually present or collectively present. In addition, the term "or" is used herein in its general sense, meaning that at least one of the associated objects is present.

[0053] The display panel in the related art cannot meet the increasingly high requirements of customers. In the case that the display panel is provided with a touch layer group 5 and a color filter layer group (including a light filtering layer 6 and a black matrix), nine patterning processes are required to form a base layer 51, a first touch functional layer 52, a touch insulating layer 53, a second touch functional layer 54, a protective layer 55 of the touch layer group, and the black matrix, a first light filtering layer 6R, a second light filtering layer 6B, a third light filtering layer 6G, and a second planarization layer 7 of the color filter layer group. These processes are low-temperature processes, that is, the temperature of the patterning process is relatively low, and a relatively long time is required to solidify these film layers, which seriously affects the production capacity. The preparation process has more procedures, resulting in high cost and low efficiency. The display panel in the related art has limitations on infrared products, that is, it is relatively difficult to be applied to infrared sensors. The reflectivity of the display panel in the related art is relatively high, resulting in high power consumption or unclear display under strong light.

[0054] The display panel provided by the example embodiments of the present disclosure can include a display backplane 10 and three layers of light filtering layers 6. The display backplane 10 can include a first sub-pixel 35R, a second sub-pixel 35G, and a third sub-pixel 35B. The three layers of light filtering layers 6 are stacked on the display side of the display backplane 10. The three layers of light filtering layers 6 can include a first light filtering layer 6R, a second light filtering layer 6B, and a third light filtering layer 6G. The orthographic projection of the first light filtering layer 6R on the display backplane 10 at least partially overlaps the first sub-pixel 35R. The first light filtering layer 6R is provided with a first opening 6R1 and a second opening 6R2. The orthographic projection of the first opening 6R1 on the display backplane 10 at least partially overlaps the second sub-pixel 35G. The orthographic projection of the second opening 6R2 on the display backplane 10 at least partially overlaps the third sub-pixel 35B. The orthographic projection of the second light filtering layer 6B on the display backplane 10 at least partially overlaps the third sub-pixel 35B. The second light filtering layer 6B is provided with a third opening 6B1 and a fourth opening 6B2. The orthographic projection of the third opening 6B1 on the display backplane 10 at least partially overlaps the first sub-pixel 35R. The orthographic projection of the fourth opening 6B2 on the display backplane 10 at least partially overlaps the second sub-pixel 35G. The third light filtering layer 6G includes a plurality of third light filtering portions 6G1 arranged at intervals. The orthographic projection of the third light filtering portion 6G1 on the display backplane 10 at least partially overlaps the second sub-pixel 35G.

[0055] The display panel of the present disclosure, on the one hand, the first filter layer 6R covers other parts of the display backboard 10 except at the first opening 6R1 and the second opening 6R2, and the second filter layer 6B covers other parts of the display backboard 10 except at the third opening 6B1 and the fourth opening 6B2, so that the first filter layer 6R and the second filter layer 6B overlap at positions except at the first opening 6R1, the second opening 6R2, the third opening 6B1 and the fourth opening 6B2, and the light that can pass through the first filter layer 6R cannot pass through the second filter layer 6B, and the light that can pass through the second filter layer 6B cannot pass through the first filter layer 6R, so that the first filter layer 6R and the second filter layer 6B overlap to form a light shielding layer, which can replace the black matrix through the first filter layer 6R and the second filter layer 6B, thereby reducing the patterning process of preparing the black matrix at one time, and further reducing the cost and improving the efficiency; on the other hand, since the transmittance of the first filter layer 6R to infrared light is relatively high, and the transmittance of the second filter layer 6B to infrared light is also relatively high, so that the transmittance of the display panel to infrared light is relatively high, so that the display panel is suitable for infrared products; on the other hand, the reflectivity of the first filter layer 6R and the second filter layer 6B overlapping to form a light shielding layer is lower, so that the reflectivity of the display panel to the ambient light is lower, and the picture can also be clearly displayed when used in strong light, and the power consumption is lower.

[0056] The display backboard 10 can be an OLED (Organic Electroluminescence Display) display backboard 10, a QLED (Quantum Dot Light Emitting Diodes) display backboard 10, etc.; the display backboard 10 has a light-emitting side (display side) and a non-light-emitting side (non-display side), and the light-emitting side and the non-light-emitting side are oppositely arranged, and the picture can be displayed on the light-emitting side, and one side of the display picture is the display surface.

[0057] The following will be described taking the OLED display backboard 10 as an example.

[0058] In the present example embodiment, as shown in FIG. 2, the display backboard 10 can include a substrate 1, and the material of the substrate 1 can include inorganic materials, for example, the inorganic materials can be glass, quartz or metal, etc. The material of the substrate 1 can also include organic materials, for example, the organic materials can be polyimide, polycarbonate, polyacrylate, polyetherimide, polyethersulfone, polyethylene terephthalate and polyethylene naphthalate, etc. The substrate 1 can be formed by multiple layers of materials, for example, the substrate 1 can include multiple layers of base material, and the material of the base material can be any of the above materials. Of course, the substrate 1 can also be provided as a single layer, which can be any of the above materials.

[0059] Referring to FIG. 2, the display backplane 10 can further include a driving substrate 2 disposed on one side of the base substrate 1 and a light-emitting substrate 3 disposed on a side of the driving substrate 2 facing away from the base substrate 1. The driving substrate 2 can include a plurality of driving circuits arranged in an array, and the light-emitting substrate 3 can include a plurality of light-emitting devices arranged in an array, the driving circuits being capable of driving the light-emitting devices to emit light.

[0060] Specifically, referring to FIG. 2, a shielding layer 21 can be disposed on one side of the base substrate 1. Light rays entering the active layer from the base substrate 1 can generate photo-generated carriers in the active layer, which can greatly affect the characteristics of the thin-film transistor and ultimately affect the display quality of the display device. The shielding layer 21 can shield the light rays entering from the base substrate 1, thereby avoiding affecting the characteristics of the thin-film transistor and avoiding affecting the display quality of the display device. Depending on the type of the thin-film transistor, the shielding layer 21 can be omitted.

[0061] A buffer layer 22 can be further formed on a side of the shielding layer 21 facing away from the base substrate 1. The buffer layer 22 can function to block water vapor and impurity ions in the base substrate 1 (particularly, an organic material) and to add hydrogen ions to the active layer formed subsequently. The buffer layer 22 can be made of an insulating material to insulate and separate the shielding layer 21 from the active layer. The buffer layer 22 can include silicon nitride, silicon oxide, or silicon oxynitride. Depending on the type of the base substrate 1 or process conditions, the buffer layer 22 can be omitted.

[0062] The active layer can be disposed on a side of the buffer layer 22 facing away from the base substrate 1. The active layer can 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 can be disposed on a side of the active layer facing away from the base substrate 1. A gate layer 25 can be disposed on a side of the gate insulating layer 24 facing away from the base substrate 1. The gate layer 25 can include a gate 251 and a gate line (not shown in the drawing).

[0063] An interlayer dielectric layer 26 can be disposed on a side of the gate layer 25 facing away from the base substrate 1. Connection vias can be disposed on the interlayer dielectric layer 26 and connected to the source connection portion 232 and the drain connection portion 233. A first connection conductor layer 27 can be disposed on a side of the interlayer dielectric layer 26 facing away from the base substrate 1. The first connection conductor layer 27 can include a source 271, a drain 272, and a data line (not shown in the drawing). The data line can be connected to the source 271 or can be a part of the data line serving as the source 271. The source 271 can be connected to the source connection portion 232 through the connection vias on the interlayer dielectric layer 26, and the drain 272 can be connected to the drain connection portion 233 through the connection vias on the interlayer dielectric layer 26.

[0064] In another example embodiment of the present 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 can include a second source and / or a second drain, which are 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, and the like can also be provided as needed.

[0065] Please continue to refer to FIG. 2, a first planarization layer 28 is provided on the side of the first connection conductor layer 27 facing away from the substrate 1, and a connection via is provided on the first planarization layer 28, which is connected to the drain 272. The channel portion 231, the gate 251, the source 271, and the drain 272 form a thin film transistor.

[0066] It should be noted that the thin film transistor described in the present specification is a top-gate type thin film transistor, and in other example embodiments of the present disclosure, the thin film transistor can also be a bottom-gate type or a dual-gate type, and the specific structure thereof will not be described here. Moreover, in the case of using a thin film transistor with opposite polarity or in the case of a change in the current direction in the circuit operation, the functions of the "source 271" and the "drain 272" are sometimes interchanged. Therefore, in the present specification, the "source 271" and the "drain 272" can be interchanged.

[0067] Please continue to refer to FIG. 2, a light-emitting substrate 3 is provided on the side of the first planarization layer 28 facing away from the substrate 1, and the light-emitting substrate 3 can include a first electrode 31, a pixel definition layer 32, a light-emitting layer group 33, and a second electrode 34.

[0068] Specifically, the first electrode 31 is provided on the side of the first planarization layer 28 facing away from the substrate 1, and the first electrode 31 is connected to the drain 272 of the driving backplane through the connection via, so that the first electrode 31 is provided with a driving signal through the drain 272, and the first electrode 31 can be an anode (pixel electrode).

[0069] The pixel definition layer 32 is provided on the side of the first electrode 31 facing away from the substrate 1, and as shown in the figure, an opening portion is provided on the pixel definition layer 32, which is communicated to the first electrode 31, so that at least part of the first electrode 31 is not covered by the pixel definition layer 32. The pixel definition layer 32 can be made of a black material capable of absorbing photons, for example, the material of the pixel definition layer 32 can be black ink; through the pixel definition layer 32, stray light can be absorbed, and the display effect can be improved.

[0070] The light-emitting layer group 33 is provided on the side of the first electrode 31 away from the substrate 1, and at least part of the light-emitting layer group 33 is located in the opening. The second electrode 34 is provided on the side of the light-emitting layer group 33 away from the substrate 1, and the second electrode 34 can be a cathode (common electrode). The light-emitting layer group 33 in one opening emits light to form one sub-pixel 35, so that the orthographic projection of the sub-pixel 35 on the substrate 1 is the orthographic projection of the light-emitting layer group 33 in the opening on the substrate 1.

[0071] The display backplane 10 can include a plurality of sub-pixels 35, and specifically, the display backplane 10 can include a plurality of first sub-pixels 35R, a plurality of second sub-pixels 35G, and a plurality of third sub-pixels 35B; the first sub-pixel 35R can be a red sub-pixel 35, i.e., the first sub-pixel 35R can emit red light; the second sub-pixel 35G can be a green sub-pixel 35, i.e., the second sub-pixel 35G can emit green light; and the third sub-pixel 35B can be a blue sub-pixel 35, i.e., the third sub-pixel 35B can emit blue light. Of course, in some other example embodiments of the present disclosure, the display backplane 10 can include a plurality of fourth sub-pixels 35, which can be white sub-pixels 35, i.e., the fourth sub-pixels 35 can emit white light; it can also be that the first sub-pixel 35R, the second sub-pixel 35G, and the third sub-pixel 35B all emit white light, and then filtered by a red filter layer, a green filter layer, and a blue filter layer.

[0072] The light-emitting layer group 33 can include a hole injection layer, a hole transport layer, an organic light-emitting layer, an electron transport layer, and an electron injection layer which are sequentially stacked, the hole injection layer is in contact with the first electrode 31, and the electron injection layer is in contact with the second electrode 34. Of course, in some other example embodiments of the present disclosure, the light-emitting layer group 33 can only include a hole transport layer, a light-emitting layer, and an electron transport layer, and the light-emitting layer group 33 can also have other structures, and the specific structure can be set as needed.

[0073] Holes are injected into the organic light-emitting layer from the side of the first electrode 31, and electrons are injected into the organic light-emitting layer from the side of the second electrode 34, and finally the holes and the electrons recombine in the organic light-emitting layer to generate excitons, and when the generated excitons relax from the excited state to the ground state, the OLED emits visible light.

[0074] The display back plate 10 can further include an encapsulation layer group 4 disposed on the side of the light-emitting substrate 3 away from the substrate substrate 1. For example, the encapsulation layer group 4 can include a first inorganic layer, an organic layer, and a second inorganic layer. The first inorganic layer is disposed on the side of the second electrode 34 away from the substrate substrate 1. The first inorganic layer can be made of silicon nitride (SiNx), silicon oxynitride (SiNO), or the like. The organic layer is disposed on the side of the first inorganic layer away from the substrate substrate 1. The organic layer can be made of an organic material such as acrylic or epoxy. The second inorganic layer is disposed on the side of the organic layer away from the substrate substrate 1. The second inorganic layer can be made of silicon nitride (SiNx), silicon oxynitride (SiNO), or the like. The encapsulation layer group 4 can encapsulate the light-emitting layer group 33 to prevent corrosion by water / oxygen in the air.

[0075] In some example embodiments of the present disclosure, referring to FIG. 2, the display back plate 10 can further include a touch layer group 5 disposed on the side of the encapsulation layer group 4 away from the substrate substrate 1. The touch layer group 5 enables the display panel to realize a touch function.

[0076] The touch layer group 5 can 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 side of the encapsulation layer group 4 away from the substrate substrate 1. The first touch functional layer 52 is disposed on the side of the base layer 51 away from the substrate substrate 1. The touch insulating layer 53 is disposed on the side of the first touch functional layer 52 away from the substrate substrate 1. The second touch functional layer 54 is disposed on the side of the touch insulating layer 53 away from the substrate substrate 1. The touch layer group 5 can further include a protective layer 55 disposed on the side of the second touch functional layer 54 away from the substrate substrate 1. The protective layer 55 can protect the second touch functional layer 54.

[0077] Of course, in some other example embodiments of the present disclosure, the touch layer group 5 can not be provided, or the touch layer group 5 can include only the base layer 51, the first touch functional layer 52, and the touch insulating layer 53 stacked.

[0078] In the example embodiment, referring to FIG. 1, three filter layers 6 are stacked on the display side of the display backplane 10; for example, referring to FIG. 7, three filter layers 6 are stacked on the side of the protective layer 55 away from the substrate 1 in the case where the touch layer group 5 is provided; the grid lines of the grid structure of the first touch functional layer 52 and the second touch functional layer 54 of the touch layer group 5 are covered by the orthographic projection of the stacked structure of the three filter layers 6 on the display backplane 10, and the grid lines of the grid structure of the first touch functional layer 52 and the second touch functional layer 54 of the touch layer group 5 do not overlap with the opening portions on the pixel definition layer 32, so as to avoid the touch layer group 5 from blocking the light emitted by each sub-pixel. In the case where the touch layer group 5 is not provided, three filter layers 6 are stacked on the side of the encapsulation layer group 4 away from the substrate 1.

[0079] Of course, in some other example embodiments of the present disclosure, three filter layers 6 are stacked on the side of the encapsulation layer group 4 away from the substrate 1, and the touch layer group 5 is provided on the side of the three filter layers 6 away from the substrate 1.

[0080] The three filter layers 6 can include a first filter layer 6R, a second filter layer 6B, and a third filter layer 6G.

[0081] Referring to FIG. 3, the first sub-pixel 35R is represented by a dashed line because it is blocked by the first filter layer 6R; the orthographic projection of the first filter layer 6R on the display backplane 10 at least partially overlaps with the first sub-pixel 35R, for example, the first sub-pixel 35R can be located within the orthographic projection of the first filter layer 6R on the display backplane 10, i.e., the orthographic projection of the first filter layer 6R on the display backplane 10 completely covers the first sub-pixel 35R, so that almost all the light emitted from the first sub-pixel 35R passes through the first filter layer 6R, the light emitted from the first sub-pixel 35R is filtered by the first filter layer 6R, and the light emitted from the first filter layer 6R is the light that can be transmitted by the first filter layer 6R. The first filter layer 6R can be a red filter layer, i.e., the first filter layer 6R can only transmit red light, but absorbs light of other colors.

[0082] The first filter layer 6R is provided with a first opening 6R1 and a second opening 6R2, a projection of the first opening 6R1 on the display backboard 10 at least partially overlaps the second sub-pixel 35G, for example, an edge line of the projection of the first opening 6R1 on the display backboard 10 can coincide with an edge line of the second sub-pixel 35G, or the projection of the first opening 6R1 on the display backboard 10 can cover and be larger than the second sub-pixel 35G, so that the projection of the first opening 6R1 on the display backboard 10 completely covers the second sub-pixel 35G, that is, the second sub-pixel 35G is located within the projection of the first opening 6R1 on the display backboard 10, so that light rays emitted from the second sub-pixel 35G almost all pass through the first opening 6R1 and are emitted.

[0083] A projection of the second opening 6R2 on the display backboard 10 at least partially overlaps the third sub-pixel 35B, for example, an edge line of the projection of the second opening 6R2 on the display backboard 10 can coincide with an edge line of the third sub-pixel 35B, or the projection of the second opening 6R2 on the display backboard 10 can cover and be larger than the third sub-pixel 35B, so that the projection of the second opening 6R2 on the display backboard 10 completely covers the third sub-pixel 35B, that is, the third sub-pixel 35B is located within the projection of the second opening 6R2 on the display backboard 10, so that light rays emitted from the third sub-pixel 35B almost all pass through the second opening 6R2 and are emitted.

[0084] Of course, in some other example embodiments of the present disclosure, a part of the projection of the first filter layer 6R on the display backboard 10 can overlap a part of the first sub-pixel 35R, a part of the projection of the first opening 6R1 on the display backboard 10 can overlap a part of the second sub-pixel 35G, and a part of the projection of the second opening 6R2 on the display backboard 10 can overlap a part of the third sub-pixel 35B.

[0085] The third sub-pixel 35B is defined by the second opening 6R2, that is, the exit of blue light is defined by the second opening 6R2.

[0086] Referring to FIG. 4, the third sub-pixel 35B is shown in dashed line because it is blocked by the second filter layer 6B; the orthographic projection of the second filter layer 6B on the display backplane 10 at least partially overlaps the third sub-pixel 35B, for example, the orthographic projection of the second filter layer 6B on the display backplane 10 can be within the third sub-pixel 35B, i.e., the orthographic projection of the second filter layer 6B on the display backplane 10 completely covers the third sub-pixel 35B, so that the light emitted from the third sub-pixel 35B is almost all emitted through the second filter layer 6B, the light emitted from the third sub-pixel 35B is filtered by the second filter layer 6B, so that the light emitted from the second filter layer 6B is the light that can be transmitted by the second filter layer 6B. The second filter layer 6B can be a blue filter layer, i.e., the second filter layer 6B can only transmit blue light, but absorbs light of other colors.

[0087] The third opening 6B1 and the fourth opening 6B2 are provided on the second filter layer 6B, the orthographic projection of the third opening 6B1 on the display backplane 10 at least partially overlaps the first sub-pixel 35R, for example, the edge line of the orthographic projection of the third opening 6B1 on the display backplane 10 can coincide with the edge line of the first sub-pixel 35R, or the orthographic projection of the third opening 6B1 on the display backplane 10 can cover and be larger than the first sub-pixel 35R, so that the orthographic projection of the third opening 6B1 on the display backplane 10 completely covers the first sub-pixel 35R, i.e., the first sub-pixel 35R is within the orthographic projection of the third opening 6B1 on the display backplane 10, so that the light emitted from the first sub-pixel 35R is almost all emitted through the third opening 6B1.

[0088] The fourth opening 6B2 on the display backplane 10 at least partially overlaps the second sub-pixel 35G, for example, the edge line of the orthographic projection of the fourth opening 6B2 on the display backplane 10 can coincide with the edge line of the second sub-pixel 35G, or the orthographic projection of the fourth opening 6B2 on the display backplane 10 can cover and be larger than the second sub-pixel 35G, so that the orthographic projection of the fourth opening 6B2 on the display backplane 10 completely covers the second sub-pixel 35G, i.e., the second sub-pixel 35G is within the orthographic projection of the fourth opening 6B2 on the display backplane 10, so that the light emitted from the second sub-pixel 35G is almost all emitted through the fourth opening 6B2.

[0089] Of course, in some other example embodiments of the present disclosure, a part of the orthographic projection of the second filter layer 6B on the display backplane 10 can overlap a part of the third sub-pixel 35B, a part of the orthographic projection of the third opening 6B1 on the display backplane 10 can overlap a part of the first sub-pixel 35R, and a part of the orthographic projection of the fourth opening 6B2 on the display backplane 10 can overlap a part of the second sub-pixel 35G.

[0090] The light exit of the first sub-pixel 35R is defined by the third opening 6B1, i.e. the exit of the red light is defined by the third opening 6B1.

[0091] Referring to FIG. 5, the second sub-pixel 35G is shown in dashed lines because it is blocked by the third filter part 6G1. The third filter layer 6G can include a plurality of third filter parts 6G1 arranged at intervals, and the orthographic projection of the third filter part 6G1 on the display backboard 10 at least partially overlaps the second sub-pixel 35G. For example, the edge line of the orthographic projection of the third filter part 6G1 on the display backboard 10 can coincide with the edge line of the second sub-pixel 35G, or the orthographic projection of the third filter part 6G1 on the display backboard 10 can cover and be larger than the second sub-pixel 35G, so that the second sub-pixel 35G is located within the orthographic projection of the third filter part 6G1 on the display backboard 10, i.e. the orthographic projection of the third filter part 6G1 on the display backboard 10 completely covers the second sub-pixel 35G, so that the light emitted from the second sub-pixel 35G is almost all emitted through the third filter part 6G1, the light emitted from the second sub-pixel 35G is filtered by the third filter part 6G1, and the light emitted from the third filter part 6G1 is light that can be transmitted by the third filter part 6G1. The third filter layer 6G can be a green filter layer, i.e. the third filter layer 6G can only transmit green light, but absorbs light of other colors.

[0092] Of course, in some other example embodiments of the present disclosure, a part of the orthographic projection of the third filter part 6G1 on the display backboard 10 can overlap a part of the second sub-pixel 35G.

[0093] According to the light blocking principle of each layer of filter layer 6, it can be obtained that the superposition of the first filter layer 6R and the second filter layer 6B can block the red band, especially can block the light of 610nm-650nm. The superposition of the first filter layer 6R and the second filter layer 6B can also block the blue band, especially can block the light of 450nm-480nm. The superposition of the second filter layer 6B and the third filter layer 6G can block the green band, especially can block the light of 5155nm-565nm, and can also block the blue band. The superposition of the first filter layer 6R and the third filter layer 6G can block the green band, and can also block the red band.

[0094] As shown in FIG. 6, the first sub-pixel 35R, the second sub-pixel 35G and the third sub-pixel 35B are represented by dashed lines because they are blocked. The first filter layer 6R is provided with the first opening 6R1 and the second opening 6R2, so that the first filter layer 6R covers other parts of the display backplane 10 except at the first opening 6R1 and the second opening 6R2. The second filter layer 6B is provided with the third opening 6B1 and the fourth opening 6B2, so that the second filter layer 6B covers other parts of the display backplane 10 except at the third opening 6B1 and the fourth opening 6B2. Furthermore, the first filter layer 6R and the second filter layer 6B overlap at positions except at the first opening 6R1, the second opening 6R2, the third opening 6B1 and the fourth opening 6B2, and light that can pass through the first filter layer 6R cannot pass through the second filter layer 6B, and light that can pass through the second filter layer 6B cannot pass through the first filter layer 6R. Therefore, the first filter layer 6R and the second filter layer 6B form a light-blocking layer, which can replace the black matrix (BM), thereby reducing the patterning process of the black matrix, and further reducing the cost and improving the efficiency.

[0095] In addition, the first filter layer 6R has a high transmittance to infrared light, and the second filter layer 6B also has a high transmittance to infrared light, so that the display panel has a high transmittance to infrared light, and is suitable for infrared products, such as infrared products provided with infrared sensors, infrared fingerprint recognition, etc.

[0096] The light-blocking layer formed by the red filter layer and the blue filter layer has a significantly improved transmittance to infrared light (760 nm-1000 microns) compared with the black matrix, for example, the transmittance at a wavelength of about 940 nm can be improved by about 60%. Moreover, the light-blocking effect of the light-blocking layer formed by the red filter layer and the blue filter layer in the visible light band (380 nm-880 nm) is basically the same as that of the black matrix BM.

[0097] Therefore, the light-blocking layer formed by the red first filter layer 6R and the blue second filter layer 6B not only has a light-blocking effect in the visible light band basically the same as that of the black matrix BM, but also has a significantly improved transmittance to infrared light, which can meet the requirements of infrared products.

[0098] In addition, it has been verified by experiments that the light-blocking layer formed by the first filter layer 6R and the second filter layer 6B has a lower reflectivity, so that the display panel has a lower reflectivity to ambient light, and the picture can be clearly displayed in strong light, and the power consumption is low.

[0099] Specifically, the reflectivity of the first light filtering layer 6R and the second light filtering layer 6B overlapping to form the light shielding layer is reduced by 0.14% relative to the structure reflectivity of the black matrix.

[0100] In some example embodiments of the present disclosure, referring to FIGS. 1, 8 and 9, the first light filtering layer 6R is arranged on the display side of the display backplate 10, for example, on the side of the protective layer 55 away from the substrate 1 in the case where the touch layer group 5 is provided, or on the side of the encapsulation layer group 4 away from the substrate 1 in the case where the touch layer group 5 is not provided. The second light filtering layer 6B is arranged on the side of the first light filtering layer 6R away from the display backplate 10, and the third light filtering layer 6G is arranged on the side of the second light filtering layer 6B away from the display backplate 10.

[0101] Of course, in some other example embodiments of the present disclosure, the first light filtering layer 6R, the second light filtering layer 6B and the third light filtering layer 6G can be sequentially stacked on the side of the encapsulation layer group 4 away from the substrate 1, and the touch layer group 5 is arranged on the side of the third light filtering layer 6G away from the substrate 1.

[0102] In this way, the third light filtering layer 6G of green color is arranged at the uppermost position, the second light filtering layer 6B of blue color is arranged at the second uppermost position, and the third light filtering layer 6G of green color includes a plurality of third light filtering portions 6G1 arranged at intervals, the orthographic projection of the third light filtering portion 6G1 on the display backplate 10 at least partially overlaps the second sub-pixel 35G, that is, the third light filtering layer 6G is only arranged at the second sub-pixel 35G, so that the area of the third light filtering layer 6G of green color is small, and thus most of the uppermost position is still the second light filtering layer 6B of blue color. Since the reflectivity of the second light filtering layer 6B of blue color is the lowest, that is, the reflectivity of the second light filtering layer 6B of blue color is lower than the reflectivity of the third light filtering layer 6G of green color and also lower than the reflectivity of the first light filtering layer 6R of red color, the reflectivity of the display panel can also be the lowest.

[0103] Alternatively, the orthographic projection of the first opening 6R1 on the display backplate 10 is located within the orthographic projection of the fourth opening 6B2 on the display backplate 10, and there is a first non-zero distance H1 between the edge line of the orthographic projection of the first opening 6R1 on the display backplate 10 and the edge line of the orthographic projection of the fourth opening 6B2 on the display backplate 10, that is, the orthographic projection of the fourth opening 6B2 on the display backplate 10 covers and is larger than the orthographic projection of the first opening 6R1 on the display backplate 10. Specifically, the first opening 6R1 and the fourth opening 6B2 can be arranged on the same central axis, and the fourth opening 6B2 is larger than the first opening 6R1, so that the first opening 6R1 and the fourth opening 6B2 combine to form an opening portion with a stepped side wall structure.

[0104] In this way, the first opening 6R1 defines the exit of green light, and the edge of the third filter part 6G1 formed subsequently can climb the step structure formed by the combination of the first opening 6R1 and the fourth opening 6B2, so as to avoid the edge of the third filter part 6G1 from being broken due to the excessively large inclination angle of the climbing, and to avoid the edge of the third filter part 6G1 from being peeled off.

[0105] The first non-zero distance H1 is greater than or equal to 1 micrometer and less than or equal to 10 micrometers, for example, the first non-zero distance H1 can be 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, 2 micrometers, 2.3 micrometers, 2.5 micrometers, 2.8 micrometers, 3 micrometers, 3.2 micrometers, 3.5 micrometers, 4 micrometers, 4.5 micrometers, 5 micrometers, 5.5 micrometers, 6 micrometers, 6.5 micrometers, 7 micrometers, 7.5 micrometers, 8 micrometers, 8.5 micrometers, 9 micrometers, 9.5 micrometers, and the like.

[0106] If the first non-zero distance H1 is too small, the alignment accuracy requirement for forming the second filter layer 6B is increased, which leads to an increase in process difficulty and cost, and the width of the step surface of the step structure formed by the combination of the first opening 6R1 and the fourth opening 6B2 is too small, which leads to the edge of the third filter part 6G1 formed subsequently to have an excessively large inclination angle of climbing, and the edge of the third filter part 6G1 is broken to cause light leakage, and the edge of the third filter part 6G1 is also prone to peeling off.

[0107] If the first non-zero distance H1 is too large, the overlapping area of the second filter layer 6B and the first filter layer 6R is reduced, thereby reducing the area of the formed light shielding layer, which is not conducive to the shielding of light.

[0108] The above numerical range not only does not increase the alignment accuracy requirement for forming the second filter layer 6B, but also avoids the edge of the third filter part 6G1 from being broken due to the excessively large inclination angle of the climbing, and avoids the edge of the third filter part 6G1 from being peeled off; and the overlapping area of the second filter layer 6B and the first filter layer 6R is ensured, and the shielding of light is ensured.

[0109] It should be noted that, in general, the sidewall of the first opening 6R1 and the sidewall of the fourth opening 6B2 are both inclined, and therefore, the first non-zero distance H1 can be the distance between the edge line of the first opening 6R1 away from the display backboard 10 and the edge line of the fourth opening 6B2 close to the display backboard 10 in the first direction X; the edge line of the first opening 6R1 away from the display backboard 10 is the top side edge line of the sidewall of the first opening 6R1, and the edge line of the fourth opening 6B2 close to the display backboard 10 is the bottom side edge line of the sidewall of the fourth opening 6B2.

[0110] In addition, in the example embodiment shown in FIG. 1 and FIG. 9, since the third filter part 6G1 is arranged small, the first non-zero interval H1 is also small to ensure that there is an overlapping part of the first filter layer 6R, the second filter layer 6B and the third filter layer 6G; in the example embodiment shown in FIG. 8, since the third filter part 6G1 is arranged large, the first non-zero interval H1 can also be large, and an overlapping part of the first filter layer 6R, the second filter layer 6B and the third filter layer 6G can also be ensured.

[0111] The orthographic projection of the fourth opening 6B2 on the display backplane 10 is within the orthographic projection of the third filter part 6G1 on the display backplane 10; for example, there is a second non-zero interval H2 between the edge line of the orthographic projection of the fourth opening 6B2 on the display backplane 10 and the edge line of the orthographic projection of the third filter part 6G1 on the display backplane 10, that is, the orthographic projection of the third filter part 6G1 on the display backplane 10 covers and is larger than the orthographic projection of the fourth opening 6B2 on the display backplane 10, specifically, the third filter part 6G1 and the fourth opening 6B2 can be arranged coaxially, and the third filter part 6G1 is larger than the fourth opening 6B2, so that the third filter part 6G1 completely covers the fourth opening 6B2.

[0112] In this way, the third filter part 6G1 not only overlaps with the first filter layer 6R, but also overlaps with the second filter layer 6B, ensuring that there is no gap between the third filter part 6G1 and the second filter layer 6B in the case of process deviation, avoiding the generation of light leakage defects.

[0113] The second non-zero interval H2 is greater than or equal to 0.5 microns, for example, the second non-zero interval H2 can be 0.8 microns, 1 micron, 1.2 microns, 1.5 microns, 1.7 microns, etc.

[0114] If the second non-zero interval H2 is too small, the alignment accuracy requirement when forming the third filter layer 6G is increased, resulting in increased process difficulty and cost.

[0115] It should be noted that in general, the side wall of the third filter part 6G1 and the side wall of the fourth opening 6B2 are both inclined, therefore, the second non-zero interval H2 can be the distance between the edge line of the third filter part 6G1 close to the display backplane 10 and the edge line of the fourth opening 6B2 away from the display backplane 10 in the first direction X, the edge line of the third filter part 6G1 close to the display backplane 10 being the bottom side edge line of the side wall of the third filter part 6G1; the edge line of the fourth opening 6B2 away from the display backplane 10 being the top side edge line of the side wall of the fourth opening 6B2.

[0116] Of course, in some other example embodiments of the present disclosure, the fourth opening 6B2 can also be such that the orthographic projection of the fourth opening 6B2 on the display backplane 10 is located within the orthographic projection of the first opening 6R1 on the display backplane 10, and the first opening 6R1 on the display backplane 10 has a first non-zero spacing between the edge line of the orthographic projection of the fourth opening 6B2 on the display backplane 10; in this case, the orthographic projection of the first opening 6R1 on the display backplane 10 is located within the orthographic projection of the third filter 6G1 on the display backplane 10, and the first opening 6R1 on the display backplane 10 has a second non-zero spacing between the edge line of the orthographic projection of the third filter 6G1 on the display backplane 10.

[0117] In some example embodiments of the present disclosure, referring to FIG. 8, in the first direction X, the third filter 6G1 can extend to the edge of the adjacent third opening 6B1, and the third filter 6G1 can cover the sidewall of the third opening 6B1 or not cover the sidewall of the third opening 6B1; the third filter 6G1 can also extend to the edge of the adjacent second opening 6R2; that is, the area of the third filter 6G1 is set to be larger, which increases the overlapping area between the third filter 6G1 and the second filter layer 6B, further avoids the peeling of the edge of the third filter 6G1, and also further expands the area of the light shielding layer formed by the first filter layer 6R, the second filter layer 6B and the third filter layer 6G, and further enhances the light shielding effect.

[0118] It should be noted that the first direction X is parallel to the display backplane 10, the first direction X is parallel to the side of the display backplane 10 on which the light shielding layer is arranged, and the first direction X is one of the multiple directions parallel to the display backplane 10.

[0119] Of course, in some other example embodiments of the present disclosure, the third filter 6G1 can extend to the edge of the adjacent third opening 6B1, but the third filter 6G1 does not extend to the edge of the adjacent second opening 6R2; or the third filter 6G1 can extend to the edge of the adjacent second opening 6R2, but the third filter 6G1 does not extend to the edge of the adjacent third opening 6B1.

[0120] In some example embodiments of the present disclosure, referring to FIG. 9, the side of the display backplane 10 close to the filter layer is provided with a recess 101; for example, in the case where the touch layer group 5 is arranged, the side of the protective layer 55 away from the substrate 1 can be provided with the recess 101; in the case where the touch layer group 5 is not arranged, the side of the second inorganic layer away from the substrate 1 can be provided with the recess 101.

[0121] Of course, in some other example embodiments of the present disclosure, the recess 101 can also be arranged on the side of the second inorganic layer away from the substrate 1, and the three-layer filter layer 6 can be arranged on the side of the encapsulation layer group 4 away from the substrate 1.

[0122] The third filter part 6G1 has a projection on the display backboard 10, and the projection at least partially overlaps the recess 101; for example, a part of the projection of the third filter part 6G1 on the display backboard 10 can overlap a part of the recess 101. Referring to FIG. 9, the recess 101 can be arranged in a ring shape, so that the recess 101 has an inner ring surface and an outer ring surface, a part of the first filter layer 6R is located in the recess 101, and the first filter layer 6R extends to the inner ring surface of the recess 101, so that the sidewall of the first opening 6R1 coincides with the inner ring surface of the recess 101. The edge of the projection of the third filter part 6G1 on the display backboard 10 overlaps the recess 101.

[0123] Of course, in some other example embodiments of the present disclosure, in the case of the three-layer filter layer shown in FIGS. 1, 8 and 9, the recess 101 can not be arranged in a ring shape, but can be arranged in a circular shape, a rectangular shape, an elliptical shape, etc. that is suitable for the second sub-pixel 35G.

[0124] The second sub-pixel 35G is surrounded by the recess 101, that is, the projection of the second sub-pixel 35G on the substrate 1 is surrounded by the projection of the recess 101 on the substrate 1.

[0125] Because the three-layer filter layer is arranged at the second sub-pixel 35G, and the two-layer filter layer is arranged at other positions, the height of the second sub-pixel 35G is higher than that of other positions; the recess 101 can reduce the overall height of the second sub-pixel 35G, which is beneficial to the planarization of the display panel; and the base surface for forming the second filter layer 6B and the third filter layer 6G is relatively flat, which further avoids the peeling of the edge of the third filter part 6G1.

[0126] Specifically, in the first direction X, the recess 101 can extend to the edge of the adjacent third opening 6B1, and the recess 101 can also extend to the edge of the adjacent second opening 6R2, that is, the area of the recess 101 is arranged to be large enough to reduce the height of the second sub-pixel 35G, which is beneficial to the planarization of the display panel.

[0127] The specific size of the recess 101 can be determined according to the specific size of the third filter portion 6G1. In the case where the third filter portion 6G1 extends to the edge of the adjacent third opening 6B1 and the third filter portion 6G1 extends to the edge of the adjacent second opening 6R2, the recess 101 extends to the edge of the adjacent third opening 6B1 and the recess 101 extends to the edge of the adjacent second opening 6R2.

[0128] In addition, in the case where the third filter portion 6G1 extends to the edge of the adjacent third opening 6B1 but the third filter portion 6G1 does not extend to the edge of the adjacent second opening 6R2, the recess 101 extends to the edge of the adjacent third opening 6B1 but the recess 101 does not extend to the edge of the adjacent second opening 6R2, and of course, in this case, the recess 101 can also extend to the edge of the adjacent second opening 6R2. In the case where the third filter portion 6G1 extends to the edge of the adjacent second opening 6R2 but the third filter portion 6G1 does not extend to the edge of the adjacent third opening 6B1, the recess 101 extends to the edge of the adjacent second opening 6R2 but the recess 101 does not extend to the edge of the adjacent third opening 6B1, and of course, in this case, the recess 101 can also extend to the edge of the adjacent third opening 6B1.

[0129] In addition, in the case where the third filter portion 6G1 extends to the edge of the adjacent third opening 6B1 but the third filter portion 6G1 does not extend to the edge of the adjacent second opening 6R2, the recess 101 extends to the edge of the adjacent third opening 6B1 but the recess 101 does not extend to the edge of the adjacent second opening 6R2, and of course, in this case, the recess 101 can also extend to the edge of the adjacent second opening 6R2. In the case where the third filter portion 6G1 extends to the edge of the adjacent second opening 6R2 but the third filter portion 6G1 does not extend to the edge of the adjacent third opening 6B1, the recess 101 extends to the edge of the adjacent second opening 6R2 but the recess 101 does not extend to the edge of the adjacent third opening 6B1, and of course, in this case, the recess 101 can also extend to the edge of the adjacent third opening 6B1.

[0130] Since the main reason for causing the height at the second sub-pixel 35G to be higher than other positions is that three filter layers are arranged, optionally, the depth of the recess 101 can be equal to the thickness of the filter layer closest to the display backboard 10, for example, the depth of the recess 101 can be equal to the thickness of the first filter layer 6R, so that the first filter layer 6R just fills the recess 101, which facilitates the preparation process of the first filter layer 6R, and also provides a relatively flat plane for the preparation of the second filter layer 6B, and can also make the height at the second sub-pixel 35G substantially consistent with the height at other positions, which is beneficial to the flattening of the display panel.

[0131] Of course, in some other example embodiments of the present disclosure, the depth of the recess 101 can also be equal to the thickness of the third filter portion 6G1, which can also make the height at the second sub-pixel 35G substantially consistent with the height at other positions, which is beneficial to the flattening of the display panel.

[0132] In some example embodiments of the present disclosure, referring to FIGS. 10-15, the first filter layer 6R and the third filter layer 6G are arranged between the second filter layer 6B and the display backplate 10, that is, the second filter layer 6B is the layer farthest from the display backplate 10 among the three filter layers, or in other words, the second filter layer 6B is arranged on the side of the first filter layer 6R and the third filter layer 6G away from the display backplate 10. Referring to FIGS. 10-12, it can be that the first filter layer 6R is arranged on the display side of the display backplate 10, the third filter layer 6G is arranged on the side of the first filter layer 6R away from the display backplate 10, and the second filter layer 6B is arranged on the side of the third filter layer 6G away from the display backplate 10.

[0133] Referring to FIGS. 13-15, it can also be that the third filter layer 6G is arranged on the display side of the display backplate 10, the first filter layer 6R is arranged on the side of the third filter layer 6G away from the display backplate 10, and the second filter layer 6B is arranged on the side of the first filter layer 6R away from the display backplate 10.

[0134] In this way, the second filter layer 6B of blue color is arranged at the uppermost position, and since the reflectivity of the second filter layer 6B of blue color is the lowest, the reflectivity of the display panel can also be the lowest. The first filter layer 6R and the second filter layer 6B are both arranged in an integral manner and are not prone to peeling; the third filter layer 6G is arranged in a spaced manner and is prone to peeling; the edge portion of the third filter portion 6G1 is covered by the first filter layer 6R and the second filter layer 6B or by the second filter layer 6B, which can avoid peeling of the third filter portion 6G1.

[0135] Alternatively, referring to FIGS. 10-12, the orthographic projection of the first opening 6R1 on the display backplate 10 is located within the orthographic projection of the fourth opening 6B2 on the display backplate 10, and there is a first non-zero spacing H1 between the edge line of the orthographic projection of the first opening 6R1 on the display backplate 10 and the edge line of the orthographic projection of the fourth opening 6B2 on the display backplate 10, that is, the orthographic projection of the fourth opening 6B2 on the display backplate 10 covers and is larger than the orthographic projection of the first opening 6R1 on the display backplate 10. Specifically, the first opening 6R1 and the fourth opening 6B2 can be arranged on the same central axis, and the fourth opening 6B2 is larger than the first opening 6R1, so that the first opening 6R1 and the fourth opening 6B2 combine to form a stepped structure. In this way, the exit of green light is defined by the first opening 6R1.

[0136] The first non-zero distance H1 is greater than or equal to 1 micrometer and less than or equal to 10 micrometers. For example, the first non-zero distance H1 can be 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, 2 micrometers, 2.3 micrometers, 2.5 micrometers, 2.8 micrometers, 3 micrometers, 3.2 micrometers, 3.5 micrometers, 4 micrometers, 4.5 micrometers, 5 micrometers, 5.5 micrometers, 6 micrometers, 6.5 micrometers, 7 micrometers, 7.5 micrometers, 8 micrometers, 8.5 micrometers, 9 micrometers, 9.5 micrometers, and the like.

[0137] If the first non-zero distance H1 is too small, the alignment accuracy requirement when forming the second filter layer 6B is increased, which leads to an increase in process difficulty and cost.

[0138] If the first non-zero distance H1 is too large, the overlapping area of the second filter layer 6B and the first filter layer 6R is reduced, thereby reducing the area of the formed light shielding layer, which is not conducive to light shielding.

[0139] The above numerical range not only does not increase the alignment accuracy requirement when forming the second filter layer 6B, but also ensures the overlapping area of the second filter layer 6B and the first filter layer 6R, thereby ensuring light shielding.

[0140] It should be noted that, in general, the sidewall of the first opening 6R1 and the sidewall of the fourth opening 6B2 are both inclined. Therefore, the first non-zero distance H1 can be the distance between the edge line of the first opening 6R1 away from the display backboard 10 and the edge line of the fourth opening 6B2 close to the display backboard 10 in the first direction X. The edge line of the first opening 6R1 away from the display backboard 10 is the top side edge line of the sidewall of the first opening 6R1, and the edge line of the fourth opening 6B2 close to the display backboard 10 is the bottom side edge line of the sidewall of the fourth opening 6B2.

[0141] In addition, in the example embodiments shown in FIGS. 10 and 12, since the third filter part 6G1 is arranged to be small, the value of the first non-zero distance H1 is also small, so as to ensure the part where the first filter layer 6R, the second filter layer 6B, and the third filter layer 6G overlap. In the example embodiment shown in FIG. 11, since the third filter part 6G1 is arranged to be large, the value of the first non-zero distance H1 can also be large, and the part where the first filter layer 6R, the second filter layer 6B, and the third filter layer 6G overlap can also be ensured.

[0142] The orthographic projection of the fourth opening 6B2 on the display backplate 10 is located within the orthographic projection of the third filter portion 6G1 on the display backplate 10; for example, the edge line of the orthographic projection of the fourth opening 6B2 on the display backplate 10 has a second non-zero spacing H2 with the edge line of the orthographic projection of the third filter portion 6G1 on the display backplate 10, that is, the orthographic projection of the third filter portion 6G1 on the display backplate 10 covers and is larger than the orthographic projection of the fourth opening 6B2 on the display backplate 10, specifically, the third filter portion 6G1 and the fourth opening 6B2 can be coaxially arranged, and the third filter portion 6G1 is larger than the fourth opening 6B2, so that the third filter portion 6G1 completely covers the fourth opening 6B2.

[0143] In this way, the third filter portion 6G1 not only overlaps with the first filter layer 6R, but also overlaps with the second filter layer 6B, ensuring that there is no gap between the third filter portion 6G1 and the second filter layer 6B in the case of process deviation, thereby avoiding the generation of light leakage defects.

[0144] The second non-zero spacing H2 is greater than or equal to 0.5 microns, for example, the second non-zero spacing H2 can be 0.8 microns, 1 micron, 1.2 microns, 1.5 microns, 1.7 microns, and the like.

[0145] If the second non-zero spacing H2 is too small, the alignment accuracy requirement when forming the third filter layer 6G is increased, resulting in increased process difficulty and cost.

[0146] It should be noted that, in general, the sidewall of the third filter portion 6G1 and the sidewall of the fourth opening 6B2 are both inclined, therefore, the second non-zero spacing H2 can be the distance between the edge line of the third filter portion 6G1 away from the display backplate 10 and the edge line of the fourth opening 6B2 close to the display backplate 10 in the first direction X, the edge line of the third filter portion 6G1 away from the display backplate 10 being the top side edge line of the sidewall of the third filter portion 6G1; the edge line of the fourth opening 6B2 close to the display backplate 10 being the bottom side edge line of the sidewall of the fourth opening 6B2.

[0147] Of course, in some other example embodiments of the present disclosure, the orthographic projection of the fourth opening 6B2 on the display backplate 10 can be located within the orthographic projection of the first opening 6R1 on the display backplate 10, and the edge line of the orthographic projection of the first opening 6R1 on the display backplate 10 has the first non-zero spacing with the edge line of the orthographic projection of the fourth opening 6B2 on the display backplate 10; in this case, the orthographic projection of the first opening 6R1 on the display backplate 10 is located within the orthographic projection of the third filter portion 6G1 on the display backplate 10, and the edge line of the orthographic projection of the first opening 6R1 on the display backplate 10 has the second non-zero spacing with the edge line of the orthographic projection of the third filter portion 6G1 on the display backplate 10.

[0148] In some exemplary embodiments of this disclosure, referring to FIG11, in the first direction X, the third filter portion 6G1 may extend to the edge of the adjacent third opening 6B1, but not into the third opening 6B1; the third filter portion 6G1 may also extend to the edge of the adjacent second opening 6R2, but not into the second opening 6R2; that is, the area of ​​the third filter portion 6G1 is set to be relatively large. This setting increases the overlap area between the third filter portion 6G1 and the second filter layer 6B, thereby further expanding the area of ​​the light-shielding layer formed by the first filter layer 6R, the second filter layer 6B and the third filter layer 6G, and further enhancing the light-shielding effect.

[0149] Of course, in some other exemplary embodiments of this disclosure, the third filter portion 6G1 may extend to the edge of the adjacent third opening 6B1, but the third filter portion 6G1 may not extend to the edge of the adjacent second opening 6R2; or the third filter portion 6G1 may extend to the edge of the adjacent second opening 6R2, but the third filter portion 6G1 may not extend to the edge of the adjacent third opening 6B1.

[0150] In some exemplary embodiments of this disclosure, as shown in FIG12, a recess 101 is provided on the side of the display back panel 10 near the filter layer; for example, when a touch layer group 5 is provided, a recess 101 may be provided on the side of the protective layer 55 away from the substrate 1; when the touch layer group 5 is not provided, a recess 101 may be provided on the side of the second inorganic layer away from the substrate 1.

[0151] Of course, in some other exemplary embodiments of this disclosure, a recess 101 may be provided on the side of the second inorganic layer away from the substrate 1, and three filter layers 6 may be stacked in the recess 101 and on the side of the encapsulation layer group 4 away from the substrate 1, and a touch layer group 5 may be provided on the side of the three filter layers 6 away from the substrate 1.

[0152] The orthographic projection of the third filter portion 6G1 on the display back panel 10 at least partially overlaps with the recessed portion 101; for example, a portion of the orthographic projection of the third filter portion 6G1 on the display back panel 10 may overlap with a portion of the recessed portion 101. Referring to FIG12, the recessed portion 101 may be configured as annular, such that the recessed portion 101 has an inner annular surface and an outer annular surface. A portion of the first filter layer 6R is located within the recessed portion 101, and the first filter layer 6R extends to the inner annular surface of the recessed portion 101, such that the sidewall of the first opening 6R1 coincides with the inner annular surface of the recessed portion 101. The edge of the orthographic projection of the third filter portion 6G1 on the display back panel 10 overlaps with the recessed portion 101.

[0153] Of course, in some other example embodiments of the present disclosure, in the case of the three-layer filter layer layer structure shown in FIGS. 10, 11 and 12, the recess 101 can not be provided in a ring shape, but can be provided in a circular shape, a rectangular shape, an elliptical shape, etc. that matches the second sub-pixel 35G.

[0154] The second sub-pixel 35G is surrounded by the recess 101, i.e., the orthographic projection of the second sub-pixel 35G on the substrate 1 is surrounded by the orthographic projection of the recess 101 on the substrate 1.

[0155] Because the three-layer filter layer is provided at the second sub-pixel 35G, and the two-layer filter layer is provided at other positions, the height at the second sub-pixel 35G is higher than that at other positions; the recess 101 can reduce the overall height at the second sub-pixel 35G, which is conducive to the planarization of the display panel; and the base surface for forming the second filter layer 6B and the third filter layer 6G is relatively flat, which further avoids the peeling of the edge portion of the third filter portion 6G1.

[0156] Specifically, in the first direction X, the recess 101 can extend to the edge of the adjacent third opening 6B1, and the recess 101 can also extend to the edge of the adjacent second opening 6R2, i.e., the area of the recess 101 is set to be large enough to reduce the height at the second sub-pixel 35G, which is conducive to the planarization of the display panel.

[0157] The specific size of the recess 101 can be determined according to the specific size of the third filter portion 6G1. In the case where the third filter portion 6G1 extends to the edge of the adjacent third opening 6B1 and the third filter portion 6G1 extends to the edge of the adjacent second opening 6R2, the recess 101 extends to the edge of the adjacent third opening 6B1 and the recess 101 extends to the edge of the adjacent second opening 6R2.

[0158] In addition, in the case where the third filter portion 6G1 extends to the edge of the adjacent third opening 6B1, but the third filter portion 6G1 does not extend to the edge of the adjacent second opening 6R2, the recess 101 extends to the edge of the adjacent third opening 6B1, but the recess 101 does not extend to the edge of the adjacent second opening 6R2, of course, the recess 101 can also extend to the edge of the adjacent second opening 6R2. In the case where the third filter portion 6G1 extends to the edge of the adjacent second opening 6R2, but the third filter portion 6G1 does not extend to the edge of the adjacent third opening 6B1, the recess 101 extends to the edge of the adjacent second opening 6R2, but the recess 101 does not extend to the edge of the adjacent third opening 6B1, of course, the recess 101 can also extend to the edge of the adjacent third opening 6B1.

[0159] Also, in the case where the third filter part 6G1 does not extend to the edge of the adjacent third opening 6B1, and the third filter part 6G1 does not extend to the edge of the adjacent second opening 6R2, the recessed part 101 can also extend to the edge of the adjacent third opening 6B1, and the recessed part 101 can also extend to the edge of the adjacent second opening 6R2.

[0160] Since the main reason for causing the height at the second sub-pixel 35G to be higher than other positions is that three filter layers are arranged, optionally, the depth of the recessed part 101 can be equal to the thickness of the filter layer closest to the display backboard 10, for example, the depth of the recessed part 101 can be equal to the thickness of the first filter layer 6R, so that the first filter layer 6R just fills the recessed part 101, facilitating the preparation process of the first filter layer 6R, and providing a relatively flat plane for the preparation of the third filter part 6G1, and also enabling the height at the second sub-pixel 35G to be substantially consistent with the height at other positions, which is beneficial to the flattening of the display panel.

[0161] Of course, in some other example embodiments of the present disclosure, the depth of the recessed part 101 can also be equal to the thickness of the third filter part 6G1, which can also enable the height at the second sub-pixel 35G to be substantially consistent with the height at other positions, which is beneficial to the flattening of the display panel.

[0162] Optionally, referring to FIGS. 13-15, the first filter layer 6R is entirely covered by the second filter layer 6B except at the third opening 6B1, since the reflectivity of the blue second filter layer 6B is the lowest, and the reflectivity of the red first filter layer 6R is relatively high, such an arrangement avoids the first filter layer 6R from leaking out, so that the reflectivity of the display panel can also be the lowest.

[0163] Specifically, the orthographic projection of the fourth opening 6B2 on the display backboard 10 is located within the orthographic projection of the first opening 6R1 on the display backboard 10, and there is a first non-zero distance H1 between the edge line of the orthographic projection of the first opening 6R1 on the display backboard 10 and the edge line of the orthographic projection of the fourth opening 6B2 on the display backboard 10, that is, the orthographic projection of the first opening 6R1 on the display backboard 10 covers and is larger than the orthographic projection of the fourth opening 6B2 on the display backboard 10. Specifically, the first opening 6R1 and the fourth opening 6B2 can be arranged with a common central axis, and the first opening 6R1 is larger than the fourth opening 6B2. In this way, the exit of green light is defined by the fourth opening 6B2.

[0164] The first non-zero distance H1 is greater than or equal to 1 micrometer and less than or equal to 10 micrometers. For example, the first non-zero distance H1 can be 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, 2 micrometers, 2.3 micrometers, 2.5 micrometers, 2.8 micrometers, 3 micrometers, 3.2 micrometers, 3.5 micrometers, 4 micrometers, 4.5 micrometers, 5 micrometers, 5.5 micrometers, 6 micrometers, 6.5 micrometers, 7 micrometers, 7.5 micrometers, 8 micrometers, 8.5 micrometers, 9 micrometers, 9.5 micrometers, and the like.

[0165] If the first non-zero distance H1 is too small, the alignment accuracy requirement when forming the second filter layer 6B is increased, which leads to an increase in process difficulty and cost.

[0166] If the first non-zero distance H1 is too large, the overlapping area of the second filter layer 6B and the first filter layer 6R is reduced, thereby reducing the area of the formed light shielding layer, which is not conducive to light shielding.

[0167] The above numerical range not only does not increase the alignment accuracy requirement when forming the second filter layer 6B, but also ensures the overlapping area of the second filter layer 6B and the first filter layer 6R, thereby ensuring light shielding.

[0168] It should be noted that, in general, the sidewall of the first opening 6R1 and the sidewall of the fourth opening 6B2 are both inclined. Therefore, the first non-zero distance H1 can be the distance between the edge line of the first opening 6R1 close to the display backboard 10 and the edge line of the fourth opening 6B2 close to the display backboard 10 in the first direction X. The edge line of the first opening 6R1 close to the display backboard 10 is the bottom edge line of the sidewall of the first opening 6R1, and the edge line of the fourth opening 6B2 close to the display backboard 10 is the bottom edge line of the sidewall of the fourth opening 6B2.

[0169] In addition, in the example embodiments shown in FIGS. 13 and 15, since the third filter part 6G1 is arranged to be small, the value of the first non-zero distance H1 is also small, so as to ensure the part where the first filter layer 6R, the second filter layer 6B, and the third filter layer 6G overlap. In the example embodiment shown in FIG. 14, since the third filter part 6G1 is arranged to be large, the value of the first non-zero distance H1 can also be large, and the part where the first filter layer 6R, the second filter layer 6B, and the third filter layer 6G overlap can also be ensured.

[0170] The orthographic projection of the first opening 6R1 on the display backplate 10 is located within the orthographic projection of the third filter portion 6G1 on the display backplate 10; for example, the first opening 6R1 on the display backplate 10 has a second non-zero spacing H2 between the edge lines of the orthographic projection of the third filter portion 6G1 on the display backplate 10, that is, the orthographic projection of the third filter portion 6G1 on the display backplate 10 covers and is larger than the orthographic projection of the first opening 6R1 on the display backplate 10, specifically, the third filter portion 6G1 can be arranged coaxially with the first opening 6R1, and the third filter portion 6G1 is larger than the first opening 6R1, so that the third filter portion 6G1 completely covers the first opening 6R1.

[0171] In this way, the third filter portion 6G1 not only overlaps the first filter layer 6R, but also overlaps the second filter layer 6B, ensuring that there is no gap between the third filter portion 6G1 and the first filter layer 6R in the case of process deviation, thereby avoiding the occurrence of light leakage defects.

[0172] The second non-zero spacing H2 is greater than or equal to 0.5 microns, for example, the second non-zero spacing H2 can be 0.8 microns, 1 micron, 1.2 microns, 1.5 microns, 1.7 microns, etc.

[0173] If the second non-zero spacing H2 is too small, the alignment accuracy requirement when forming the third filter layer 6G is increased, resulting in increased process difficulty and cost.

[0174] It should be noted that, in general, the sidewall of the third filter portion 6G1 and the sidewall of the first opening 6R1 are both inclined, so the second non-zero spacing H2 can be the distance between the edge line of the third filter portion 6G1 away from the display backplate 10 and the edge line of the first opening 6R1 close to the display backplate 10 in the first direction X; the edge line of the third filter portion 6G1 away from the display backplate 10 is the top side edge line of the sidewall of the third filter portion 6G1; and the edge line of the first opening 6R1 close to the display backplate 10 is the bottom side edge line of the sidewall of the first opening 6R1.

[0175] Of course, in some other example embodiments of the present disclosure, the orthographic projection of the first opening 6R1 on the display backplate 10 can be located within the orthographic projection of the fourth opening 6B2 on the display backplate 10, and the first opening 6R1 on the display backplate 10 has a first non-zero spacing between the edge lines of the orthographic projection of the fourth opening 6B2 on the display backplate 10; in this case, the orthographic projection of the fourth opening 6B2 on the display backplate 10 is located within the orthographic projection of the third filter portion 6G1 on the display backplate 10, and the orthographic projection of the fourth opening 6B2 on the display backplate 10 has a second non-zero spacing between the edge lines of the orthographic projection of the third filter portion 6G1 on the display backplate 10.

[0176] In some example embodiments of the present disclosure, referring to FIG. 14, in the first direction X, the third light filtering part 6G1 can extend to the edge of the adjacent third opening 6B1 but not extend into the third opening 6B1; the third light filtering part 6G1 can also extend to the edge of the adjacent second opening 6R2 but not extend into the second opening 6R2; that is, the area of the third light filtering part 6G1 is set to be larger, which increases the overlapping area between the third light filtering part 6G1 and the first light filtering layer 6R, so that the area of the light shielding layer formed by the first light filtering layer 6R, the second light filtering layer 6B and the third light filtering layer 6G is further expanded, and the light shielding effect is further enhanced.

[0177] Of course, in some other example embodiments of the present disclosure, the third light filtering part 6G1 can extend to the edge of the adjacent third opening 6B1, but the third light filtering part 6G1 does not extend to the edge of the adjacent second opening 6R2; it can also be that the third light filtering part 6G1 extends to the edge of the adjacent second opening 6R2, but the third light filtering part 6G1 does not extend to the edge of the adjacent third opening 6B1.

[0178] In some example embodiments of the present disclosure, referring to FIG. 15, a recess 101 is arranged on the side of the display back plate 10 close to the light filtering layer; for example, in the case where the touch layer group 5 is arranged, the recess 101 can be arranged on the side of the protective layer 55 away from the substrate substrate 1; in the case where the touch layer group 5 is not arranged, the recess 101 can be arranged on the side of the second inorganic layer away from the substrate substrate 1.

[0179] Of course, in some other example embodiments of the present disclosure, the recess 101 can also be arranged on the side of the second inorganic layer away from the substrate substrate 1, three layers of light filtering layers 6 are arranged in the recess 101 and on the side of the encapsulation layer group 4 away from the substrate substrate 1, and the touch layer group 5 is arranged on the side of the three layers of light filtering layers 6 away from the substrate substrate 1.

[0180] The orthographic projection of the second sub-pixel 35G on the substrate substrate 1 is located in the orthographic projection of the recess 101 on the substrate substrate 1.

[0181] Because three layers of light filtering layers are arranged at the second sub-pixel 35G and two layers of light filtering layers are arranged at other positions, the second sub-pixel 35G is higher than other positions; the recess 101 can reduce the overall height of the second sub-pixel 35G, which is beneficial to the planarization of the display panel; and the base surface for forming the second light filtering layer 6B and the third light filtering layer 6G is relatively flat, which further avoids the edge part of the third light filtering part 6G1 from peeling off.

[0182] Alternatively, the third filter part 6G1 can be arranged in the recessed part 101. In this case, the third filter part 6G1 can be arranged in the recessed part 101, for example, the edge line of the third filter part 6G1 in the display backplane 10 can coincide with the edge line of the recessed part 101, or the recessed part 101 can cover and be larger than the third filter part 6G1 in the display backplane 10. Since the main reason for the height of the second sub-pixel 35G being higher than other positions is that the third filter part 6G1 is arranged, the third filter part 6G1 in the display backplane 10 is arranged in the recessed part 101, so that the entire third filter part 6G1 is formed at the position where the recessed part 101 is arranged, thereby reducing the height of the second sub-pixel 35G as a whole, which is beneficial to the planarization of the display panel.

[0183] Specifically, in the first direction X, the recessed part 101 can extend to the edge of the adjacent third opening 6B1, and the recessed part 101 can also extend to the edge of the adjacent second opening 6R2, that is, the area of the recessed part 101 is arranged to be large enough to reduce the height of the second sub-pixel 35G, which is beneficial to the planarization of the display panel.

[0184] The specific size of the recessed part 101 can be determined according to the specific size of the third filter part 6G1. In the case where the third filter part 6G1 extends to the edge of the adjacent third opening 6B1 and the third filter part 6G1 extends to the edge of the adjacent second opening 6R2, the recessed part 101 extends to the edge of the adjacent third opening 6B1 and the recessed part 101 extends to the edge of the adjacent second opening 6R2.

[0185] In addition, in the case where the third filter part 6G1 extends to the edge of the adjacent third opening 6B1, but the third filter part 6G1 does not extend to the edge of the adjacent second opening 6R2, the recessed part 101 extends to the edge of the adjacent third opening 6B1, but the recessed part 101 does not extend to the edge of the adjacent second opening 6R2. Of course, in this case, the recessed part 101 can also extend to the edge of the adjacent second opening 6R2. In the case where the third filter part 6G1 extends to the edge of the adjacent second opening 6R2, but the third filter part 6G1 does not extend to the edge of the adjacent third opening 6B1, the recessed part 101 extends to the edge of the adjacent second opening 6R2, but the recessed part 101 does not extend to the edge of the adjacent third opening 6B1. Of course, in this case, the recessed part 101 can also extend to the edge of the adjacent third opening 6B1.

[0186] In addition, in the case where the third filter part 6G1 extends to the edge of the adjacent third opening 6B1, but the third filter part 6G1 does not extend to the edge of the adjacent second opening 6R2, the recessed part 101 extends to the edge of the adjacent third opening 6B1, but the recessed part 101 does not extend to the edge of the adjacent second opening 6R2. Of course, in this case, the recessed part 101 can also extend to the edge of the adjacent second opening 6R2. In the case where the third filter part 6G1 extends to the edge of the adjacent second opening 6R2, but the third filter part 6G1 does not extend to the edge of the adjacent third opening 6B1, the recessed part 101 extends to the edge of the adjacent second opening 6R2, but the recessed part 101 does not extend to the edge of the adjacent third opening 6B1. Of course, in this case, the recessed part 101 can also extend to the edge of the adjacent third opening 6B1.

[0187] Due to the main reason for causing the height at the second sub-pixel 35G to be higher than other positions is that the three-layer filter layer is arranged, optionally, the depth of the recess 101 can be equal to the thickness of the third filter part 6G1, so that the third filter part 6G1 just fills the recess 101, facilitates the preparation process of the first filter layer 6R, and provides a relatively flat plane for the preparation of the second filter layer 6B, and can also make the height at the second sub-pixel 35G substantially consistent with the height at other positions, which is beneficial to the flattening of the display panel.

[0188] In some example embodiments of the present disclosure, the thickness of the first filter layer 6R is greater than or equal to 1.5 microns and less than or equal to 4.5 microns, for example, the thickness of the first filter layer 6R can be 1.7 microns, 2 microns, 2.3 microns, 2.5 microns, 2.8 microns, 3 microns, 3.2 microns, 3.5 microns, 3.7 microns, 4 microns, 4.3 microns, etc.

[0189] The thickness of the second filter layer 6B is greater than or equal to 1.5 microns and less than or equal to 4.5 microns, for example, the thickness of the second filter layer 6B can be 1.7 microns, 2 microns, 2.3 microns, 2.5 microns, 2.8 microns, 3 microns, 3.2 microns, 3.5 microns, 3.7 microns, 4 microns, 4.3 microns, etc.

[0190] The thickness of the third filter layer 6G is greater than or equal to 1.5 microns and less than or equal to 4.5 microns, for example, the thickness of the third filter layer 6G can be 1.7 microns, 2 microns, 2.3 microns, 2.5 microns, 2.8 microns, 3 microns, 3.2 microns, 3.5 microns, 3.7 microns, 4 microns, 4.3 microns, etc.

[0191] Optionally, the thickness of the first filter layer 6R is less than 2 microns, in particular, the thickness of the first filter layer 6R can also be 1.6 microns, 1.8 microns, 1.9 microns, etc. By setting in this way, the depth of the first opening 6R1 and the second opening 6R2 will not be too deep, ensuring that the second filter layer 6B or the third filter layer 6G can wrap and cover the edges of the first opening 6R1 and the second opening 6R2, and guarantee the flattening of the display panel as a whole.

[0192] In addition, in some other example embodiments of the present disclosure, in the stacking relationship of the three-layer filter layer 6, the third filter layer 6G, the second filter layer 6B and the first filter layer 6R can be sequentially stacked in the direction away from the display backboard 10, the second filter layer 6B, the third filter layer 6G and the first filter layer 6R can also be sequentially stacked in the direction away from the display backboard 10, and the second filter layer 6B, the first filter layer 6R and the third filter layer 6G can also be sequentially stacked in the direction away from the display backboard 10.

[0193] The size of the three filter layers 6 can also be set as follows: the second filter layer 6B and the third filter layer 6G are set as whole layers, and the first filter layer 6R includes a plurality of first filter parts arranged at intervals; specifically, the third filter layer 6G covers the second sub-pixel 35G in the orthographic projection on the display backboard 10; the third filter layer 6G is provided with two opening parts, one of which covers the first sub-pixel 35R in the orthographic projection on the display backboard 10, and the other of which covers the third sub-pixel 35B in the orthographic projection on the display backboard 10; the specific structure of the second filter layer 6B has been described in detail above, and thus will not be described here again.

[0194] The size of the three filter layers 6 can also be set as follows: the second filter layer 6B and the third filter layer 6G are set as whole layers, and the first filter layer 6R includes a plurality of first filter parts arranged at intervals; specifically, the third filter layer 6G covers the second sub-pixel 35G in the orthographic projection on the display backboard 10; the third filter layer 6G is provided with two opening parts, one of which covers the first sub-pixel 35R in the orthographic projection on the display backboard 10, and the other of which covers the third sub-pixel 35B in the orthographic projection on the display backboard 10; the specific structure of the second filter layer 6B has been described in detail above, and thus will not be described here again.

[0195] The second planarization layer 7 is arranged on the side of the three filter layers 6 away from the display backboard 10, and the second planarization layer 7 can planarize the structure formed by the three filter layers 6, facilitating subsequent bonding with the cover plate 9; specifically, the bonding layer 8 can be arranged on the side of the second planarization layer 7 away from the display backboard 10, and the cover plate 9 can be arranged on the side of the bonding layer 8 away from the display backboard 10; the cover plate 9 is fixed by the bonding layer 8, and the bonding layer 8 can be OCA (Optically Clear Adhesive).

[0196] Based on the same inventive concept, the example embodiments of the present disclosure provide a display device, which can include the display panel of any one of the above. The specific structure of the display panel has been described in detail above, and thus will not be described here again.

[0197] The specific type of the display device is not particularly limited, and any type of display device commonly used in the art can be used, such as a mobile device such as a mobile phone, a wearable device such as a watch, a VR device, and the like. The specific type of the display device can be selected according to the specific use of the display device by those skilled in the art, and thus will not be described here again.

[0198] It should be noted that the display device further comprises other necessary components and compositions besides the display panel, for example, a housing, a circuit board, a power cord, etc., which will be supplemented by those skilled in the art according to the specific use requirements of the display device, and will not be described here.

[0199] Compared with the prior art, the display device provided by the example embodiments of the present application has the same beneficial effects as the display panel provided by the example embodiments described above, and will not be described here.

[0200] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses or adaptations of the disclosure that are deemed to fall within the general principles of the disclosure and include examples of the known art or technical means in the field that are not disclosed in the disclosure. The specification and examples are considered to be exemplary only, and the true scope and spirit of the disclosure are indicated by the appended claims.

Claims

1. A display panel, wherein, The display backplane comprises a first sub-pixel, a second sub-pixel, and a third sub-pixel. The three-layer filter layer is arranged on the display side of the display backplane in a stacked manner, and comprises a first filter layer, a second filter layer, and a third filter layer. The first filter layer has an orthographic projection on the display backplane that at least partially overlaps the first sub-pixel. The first filter layer is provided with a first opening and a second opening. The orthographic projection of the first opening on the display backplane at least partially overlaps the second sub-pixel. The orthographic projection of the second opening on the display backplane at least partially overlaps the third sub-pixel. The second filter layer has an orthographic projection on the display backplane that at least partially overlaps the third sub-pixel. The second filter layer is provided with a third opening and a fourth opening. The orthographic projection of the third opening on the display backplane at least partially overlaps the first sub-pixel. The orthographic projection of the fourth opening on the display backplane at least partially overlaps the second sub-pixel. The third filter layer comprises a plurality of third filter portions arranged at intervals. The orthographic projection of the third filter portion on the display backplane at least partially overlaps the second sub-pixel. The orthographic projection of the first opening on the display backplane is located within the orthographic projection of the fourth opening on the display backplane. The orthographic projection of the fourth opening on the display backplane is located within the orthographic projection of the third filter portion on the display backplane.

2. The display panel of claim 1, wherein, Alternatively, the orthographic projection of the fourth opening on the display backplane is located within the orthographic projection of the first opening on the display backplane. The orthographic projection of the first opening on the display backplane is located within the orthographic projection of the third filter portion on the display backplane. The first non-zero spacing is between the edge line of the orthographic projection of the first opening on the display backplane and the edge line of the orthographic projection of the fourth opening on the display backplane. The first non-zero spacing is greater than or equal to 1 micrometer and less than or equal to 10 micrometers.

3. The display panel of claim 2, wherein, The second non-zero spacing is between the edge line of the orthographic projection of the fourth opening on the display backplane and the edge line of the orthographic projection of the third filter portion on the display backplane, or between the edge line of the orthographic projection of the first opening on the display backplane and the edge line of the orthographic projection of the third filter portion on the display backplane.

4. The display panel of claim 2, wherein, The second non-zero spacing is greater than or equal to 0.5 micrometer.

5. The display panel of claim 4, wherein, In a first direction parallel to the display backplane, the third filter portion extends to the edge of the third opening adjacent thereto, and / or the third filter portion extends to the edge of the second opening adjacent thereto.

6. The display panel of claim 4, wherein, The display backplane is provided with a recess on the side close to the filter layer. The orthographic projection of the third filter portion on the display backplane at least partially overlaps the recess.

7. The display panel of claim 1, wherein, The orthographic projection of the third filter portion on the display backplane is located within the recess, or the recess is arranged in a ring shape. The edge of the orthographic projection of the third filter portion on the display backplane overlaps the recess. The sidewall of the first opening or the sidewall of the fourth opening coincides with the inner ring surface of the recess.

8. The display panel of claim 7, wherein, ​ 9. The display panel of claim 7, wherein, The depth of the recess is equal to the thickness of the filter layer closest to the display backplate, or the depth of the recess is equal to the thickness of the third filter portion.

10. The display panel of claim 7, wherein, In a first direction parallel to the display backplate, the recess extends to the edge of the third opening, and / or the recess extends to the edge of the second opening.

11. The display panel according to any one of claims 1 to 10, wherein The first filter layer is a red filter layer, the second filter layer is a blue filter layer, and the third filter layer is a green filter layer.

12. The display panel of claim 11, wherein, The first sub-pixel is a red sub-pixel, the second sub-pixel is a green sub-pixel, and the third sub-pixel is a blue sub-pixel.

13. The display panel of claim 11, wherein, The first filter layer is disposed on the display side of the display backplate, the second filter layer is disposed on the side of the first filter layer away from the display backplate, and the third filter layer is disposed on the side of the second filter layer away from the display backplate.

14. The display panel of claim 13, wherein, The fourth opening covers and is larger than the orthographic projection of the first opening on the display backplate, so that the fourth opening and the first opening combine to form an opening portion of a stepped structure.

15. The display panel of claim 11, wherein, The first filter layer and the third filter layer are disposed between the second filter layer and the display backplate.

16. The display panel of claim 15, wherein, The first filter layer is disposed on the display side of the display backplate, the third filter layer is disposed on the side of the first filter layer away from the display backplate, and the second filter layer is disposed on the side of the third filter layer away from the display backplate. The first filter layer is disposed on the display side of the display backplate, the third filter layer is disposed on the side of the first filter layer away from the display backplate, and the second filter layer is disposed on the side of the third filter layer away from the display backplate.

17. The display panel of claim 16, wherein, The first filter layer is entirely covered by the second filter layer except at the third opening.

18. The display panel according to any one of claims 1 to 10, wherein The thickness of the first filter layer is greater than or equal to 1.5 microns and less than or equal to 4.5 microns, the thickness of the second filter layer is greater than or equal to 1.5 microns and less than or equal to 4.5 microns, and the thickness of the third filter layer is greater than or equal to 1.5 microns and less than or equal to 4.5 microns.

19. The display panel of claim 18, wherein, The thickness of the first filter layer is less than 2 microns.

20. The display panel according to any one of claims 1 to 10, wherein The first sub-pixel is located within the orthographic projection of the first filter layer on the display backplate, the second sub-pixel is located within the orthographic projection of the first opening on the display backplate, and the third sub-pixel is located within the orthographic projection of the second opening on the display backplate. The third sub-pixel is located within the orthographic projection of the second filter layer on the display backplate, the first sub-pixel is located within the orthographic projection of the third opening on the display backplate, and the second sub-pixel is located within the orthographic projection of the fourth opening on the display backplate. The second sub-pixel is located within the orthographic projection of the third filter portion on the display backplate.

21. A display device, wherein, The display panel is the display panel of any one of claims 1-20. The display panel is the display panel of any one of claims 1-20.

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