Display panel and display apparatus

Abstract

The present disclosure relates to the technical field of display. Disclosed are a display panel and a display apparatus. The display panel comprises: a display backplane, which comprises a plurality of sub-pixels; a first light-shielding layer, which is disposed on a light-emitting side of the display backplane, wherein the first light-shielding layer is provided with a plurality of first via holes, a sub-pixel is located within the orthographic projection of a first via hole on the display backplane, the orthographic projection of the first via hole on the display backplane is a first region, and other regions of the display backplane are referred to as a second region, and the sub-pixel is located within the orthographic projection of a filter layer on the display backplane; the filter layer and a second light-shielding layer, which are disposed on the side of the first light-shielding layer that is away from the display backplane, wherein the second light-shielding layer is provided with a plurality of second via holes, the orthographic projection of the second light-shielding layer on the display backplane and the orthographic projection of the first light-shielding layer on the display backplane overlap each other and jointly cover the second region, and the orthographic projection of a second via hole on the display backplane covers the orthographic projection of the first via hole on the display backplane, and the area of the orthographic projection of the second via hole on the display backplane is greater than the area of the orthographic projection of the first via hole on the display backplane. By means of the display panel, luminance attenuation at oblique viewing angles is alleviated.

Description

Display panel and display device

[0001] Cross-reference to related applications

[0002] The present disclosure claims priority to Chinese Patent Application No. 202411001183.9, filed on July 24, 2024, entitled “Display panel and display device”, the entire contents of which are incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of display, in particular, to a display panel and a display device. BACKGROUND

[0004] An organic light-emitting display (OLED) display panel has become a mainstream development direction in the field of display technology due to its self-luminous, high brightness, good picture quality, low energy consumption and other advantages.

[0005] However, the current display panel has a large side viewing angle luminance decay, resulting in a small viewable viewing angle range of the display panel, which does not meet the needs of some users.

[0006] 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. SUMMARY

[0007] The purpose of the present disclosure is to overcome the deficiencies of the prior art, and to provide a display panel and a display device.

[0008] According to one aspect of the present disclosure, a display panel is provided, comprising:

[0009] A display backplane comprising a plurality of sub-pixels, the display backplane having a first area and a second area;

[0010] A first light shielding layer is provided on the light emitting side of the display backplane, a plurality of first vias are provided on the first light shielding layer, the sub-pixels are located within the orthographic projection of the first vias on the display backplane, the orthographic projection of the first vias on the display backplane is the first area, and the other area of the display backplane is the second area;

[0011] A light filtering layer is provided on the side of the first light shielding layer away from the display backplane, and the sub-pixels are located within the orthographic projection of the light filtering layer on the display backplane;

[0012] A second light-shielding layer is disposed on a side of the first light-shielding layer away from the display backplane, and a plurality of second through holes are disposed on the second light-shielding layer. A projection of the second light-shielding layer on the display backplane overlaps with a projection of the first light-shielding layer on the display backplane, and together covers the second area. A projection of the second through hole on the display backplane covers a projection of the first through hole on the display backplane, and an area of the projection of the second through hole on the display backplane is greater than an area of the projection of the first through hole on the display backplane.

[0013] In an example embodiment of the present disclosure, the display panel further comprises:

[0014] A light adjusting layer is disposed on the first light-shielding layer. The second light-shielding layer is disposed on a side of the light adjusting layer away from the display backplane. A plurality of recessed portions are disposed on the light adjusting layer. The sub-pixels are located within a projection of the recessed portions on the display backplane. At least part of the light filtering layer is disposed in the recessed portions. A refractive index of the light filtering layer is greater than a refractive index of the light adjusting layer.

[0015] In an example embodiment of the present disclosure, the first light-shielding layer comprises a plurality of first light-shielding rings. A projection of the first light-shielding ring on the display backplane is annular. An inner ring of the first light-shielding ring is the first through hole.

[0016] In an example embodiment of the present disclosure, a first gap is disposed between two adjacent first light-shielding rings. A recessed structure is disposed on the light adjusting layer. A projection of the recessed structure on the display backplane is located within a projection of the first gap on the display backplane.

[0017] In an example embodiment of the present disclosure, at least part of the second light-shielding layer is disposed in the recessed structure. A projection of the first gap on the display backplane is located within a projection of the second light-shielding layer on the display backplane.

[0018] In an example embodiment of the present disclosure, a distance between a side of the second light-shielding layer away from the display backplane and the display backplane is a first distance. A distance between a side of the light filtering layer away from the display backplane and the display backplane is a second distance. The first distance is less than or equal to the second distance.

[0019] In an example embodiment of the present disclosure, at least part of two adjacent first light-shielding rings are connected as a whole.

[0020] In an example embodiment of the present disclosure, a projection of the second via on the display backplane is the third region, other regions of the display backplane are the fourth region, and a projection of the second light shielding layer on the display backplane coincides with the fourth region.

[0021] In an example embodiment of the present disclosure, a projection of the first light shielding layer on the display backplane coincides with the second region.

[0022] In an example embodiment of the present disclosure, the second light shielding layer includes a plurality of second light shielding rings, a projection of the second light shielding ring on the display backplane is annular, and an inner ring of the second light shielding ring is the second via.

[0023] In an example embodiment of the present disclosure, a second gap is arranged between two adjacent second light shielding rings, or at least part of two adjacent second light shielding rings are connected as a whole.

[0024] In an example embodiment of the present disclosure, a projection of the first light shielding layer on the display backplane coincides with the second region, and a projection of the second via on the display backplane is the third region, other regions of the display backplane are the fourth region, and a projection of the second light shielding layer on the display backplane coincides with the fourth region.

[0025] In an example embodiment of the present disclosure, the light filtering layer includes a first light filtering part, a second light filtering part, and a third light filtering part, the light filtering colors of the first light filtering part, the second light filtering part, and the third light filtering part are different from each other, and at least two of the first light filtering part, the second light filtering part, and the third light filtering part extend to a side of the light adjusting layer away from the display backplane and are arranged in a stack to form the second light shielding layer.

[0026] In an example embodiment of the present disclosure, the light filtering layer includes a first light filtering part, a second light filtering part, and a third light filtering part, the first light filtering part, the second light filtering part, and the third light filtering part extend to a side of the light adjusting layer adjacent to the display backplane and do not overlap, and at least part of the second light shielding layer is arranged on a side of the light filtering layer away from the display backplane.

[0027] In an example embodiment of the present disclosure, a projection of the second light shielding layer on the display backplane does not overlap with a projection of the recess on the display backplane.

[0028] In an example embodiment of the present disclosure, a plurality of grooves are arranged on the light filtering layer, a projection of the groove on the display backplane is located within the sub-pixel, and the display panel further includes:

[0029] a planarization layer disposed on a side of the filter layer away from the display backplane, a portion of the planarization layer filling the recess.

[0030] In an example embodiment of the present disclosure, the filter layer has a refractive index greater than a refractive index of the planarization layer.

[0031] In an example embodiment of the present disclosure, a distance between the recess sidewall and the display backplane in a second direction increases as a distance from the recess edge line in a first direction decreases, the first direction being parallel to the display backplane, and the second direction being perpendicular to the display backplane.

[0032] In an example embodiment of the present disclosure, the recess is a via hole disposed on the light adjusting layer.

[0033] According to another aspect of the present disclosure, there is provided a display device comprising the display panel as described in any one of the above.

[0034] It should be understood that the general description above and the detailed description below are only exemplary and explanatory, and are not intended to limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0035] 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 to be considered limiting of the scope of the present disclosure.

[0036] FIG. 1 is a structural schematic diagram of a first example embodiment of a display panel of the present disclosure.

[0037] FIG. 2 is a structural schematic diagram of an example embodiment of a display backplane in FIG. 1.

[0038] FIG. 3 is a top view schematic diagram of a first light shielding layer in FIG. 1.

[0039] FIG. 4 is a top view schematic diagram of a second light shielding layer in FIG. 1.

[0040] FIG. 5 is a top view schematic diagram of the first light shielding layer in FIG. 3 and the second light shielding layer in FIG. 4 stacked together and cooperating with a sub-pixel.

[0041] FIG. 6 is a top view schematic diagram of a light adjusting layer cooperating with the display backplane.

[0042] FIG. 7 is a structural schematic diagram of another example embodiment of a first light shielding layer in a display panel of the present disclosure.

[0043] FIG. 8 is a structural schematic diagram of a first light-shielding layer in a display panel according to an example embodiment of the present disclosure.

[0044] FIG. 9 is a structural schematic diagram of a second light-shielding layer in a display panel according to another example embodiment of the present disclosure.

[0045] FIG. 10 is a structural schematic diagram of the second light-shielding layer in a display panel according to another example embodiment of the present disclosure.

[0046] FIG. 11 is a structural schematic diagram of a display panel according to a second example embodiment of the present disclosure.

[0047] FIG. 12 is a structural schematic diagram of a display panel according to a third example embodiment of the present disclosure.

[0048] FIG. 13 is a structural schematic diagram of a display panel according to a fourth example embodiment of the present disclosure.

[0049] FIG. 14 is a structural schematic diagram of a display panel according to a fifth example embodiment of the present disclosure.

[0050] FIG. 15 is a structural schematic diagram of a display panel according to a sixth example embodiment of the present disclosure.

[0051] FIG. 16 is a structural schematic diagram of a display panel according to a seventh example embodiment of the present disclosure.

[0052] FIG. 17 is a structural schematic diagram of a display panel according to an eighth example embodiment of the present disclosure.

[0053] FIG. 18 is a partial enlarged schematic diagram of a groove in FIGS. 14-17.

[0054] Label explanation: 100, display backboard; 1001, first area; 1002, second area; 1003, third area; 1004, fourth area; 1, substrate substrate; 2, driving substrate; 21, shielding layer; 22, buffer layer; 231, channel part; 232, source connection part; 233, drain connection part; 24, gate insulation layer; 25, gate layer; 251, gate; 26, interlayer dielectric layer; 27, first connection conductor layer; 271, source; 272, drain; 28, first planarization layer; 3, light-emitting substrate; 31, first electrode; 32, pixel definition layer; 321, pixel opening part; 33, light-emitting layer group; 34, second electrode; 35, sub-pixel; 35R, red sub-pixel; 35G, green sub-pixel; 35B, blue sub-pixel; 4, encapsulation layer group; 41, first inorganic layer; 42, organic layer; 43, second inorganic layer; 5, touch layer group; 6, first light-shielding layer; 61, first via hole; 62, first light-shielding ring; 63, first gap; 7, filter layer; 71, first filter part; 72, second filter part; 73, third filter part; 74, groove; 741, first part; 742, second part; 743, third part; 8, second light-shielding layer; 81, second via hole; 82, second light-shielding ring; 83, second gap; 9, light line adjusting layer; 91, recessed part; 92, recessed structure; 10, planarization layer; X, first direction; Y, second direction. DETAILED DESCRIPTION

[0055] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings; however, the example embodiments can be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the specification. Moreover, the figures can not be to scale and some features can be exaggerated to show details of particular implementations. Measures of thicknesses and lengths and the like can not be drawn to scale unless expressly stated.

[0056] 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 necessarily limiting. It will be further understood that, when a component is referred to as being "on" or "under" another component, it can be directly on or under the other component or intervening components can also be present. In addition, spatially relative terms, such as "beneath", "below", "lower", "above", "upper", etc., can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device described is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can be oriented in any direction and terms such as "above" or "below" can be understood accordingly.

[0057] The terms "one", "a", "an", "the", and "at least one" are used interchangeably to indicate that one or more elements, components, or the like are present; the terms "includes", "including", "has", "having", and "contains", "containing" are used interchangeably and mean that additional elements, components, or the like can be present; the terms "first", "second", and "third", and the like are used merely as labels, and are not meant to impose numerical limitations of their objects.

[0058] In the present application, unless specifically and explicitly defined otherwise, the term "connected" should be interpreted broadly, for example, "connected" can be fixedly connected, or detachably connected, or integrated; can be directly connected, or indirectly connected through an intermediate medium. "And / or", is only a description of the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the existence of A alone, the existence of A and B, and the existence of B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects have an "or" relationship.

[0059] The example embodiments of the present disclosure provide a display panel, as shown in FIGS. 1-18, which can include a display backplane 100, a first light shielding layer 6, a filter layer 7, and a second light shielding layer 8; the display backplane 100 can include a plurality of sub-pixels 35, the display backplane 100 has a first area 1001 and a second area 1002; the first light shielding layer 6 is provided on the light-emitting side of the display backplane 100, a plurality of first vias 61 are provided on the first light shielding layer 6, the sub-pixel 35 is located within the orthographic projection of the first via 61 on the display backplane 100, the orthographic projection of the first via 61 on the display backplane 100 is the first area 1001, and other areas of the display backplane 100 are the second area 1002; the filter layer 7 is provided on the side of the first light shielding layer 6 away from the display backplane 100, and the sub-pixel 35 is located within the orthographic projection of the filter layer 7 on the display backplane 100; the second light shielding layer 8 is provided on the side of the first light shielding layer 6 away from the display backplane 100, a plurality of second vias 81 are provided on the second light shielding layer 8, the orthographic projection of the second light shielding layer 8 on the display backplane 100 overlaps the orthographic projection of the first light shielding layer 6 on the display backplane 100, and together covers the second area 1002, the orthographic projection of the second via 81 on the display backplane 100 covers the orthographic projection of the first via 61 on the display backplane 100, and the area of the orthographic projection of the second via 81 on the display backplane 100 is greater than the area of the orthographic projection of the first via 61 on the display backplane 100.

[0060] The display panel of the present disclosure, on the one hand, the first light shielding layer 6 and the second light shielding layer 8 jointly form a black matrix, and the space between the adjacent sub-pixels 35 is shielded by the first light shielding layer 6 and the second light shielding layer 8, which prevents light leakage of the display panel, prevents color mixing between adjacent sub-pixels 35, improves display contrast, and effectively prevents the influence of light on the thin film transistor area, thereby maintaining display stability and accuracy; on the other hand, the second light shielding layer 8 arranged above the first light shielding layer 6 can shield more stray light from the display panel, so that the dark state is excellent and the integral black effect is improved; on the other hand, the first via hole 61 is arranged to be smaller, so that the width of the first light shielding layer 6 between the adjacent sub-pixels 35 is larger, and the second via hole 81 is arranged to be larger, so that the width of the second light shielding layer 8 between the adjacent sub-pixels 35 is smaller; the second light shielding layer 8 away from the display backboard 100 is arranged to be narrower, so that more inclined light can be emitted from the display panel, thereby reducing the side viewing angle brightness decay and increasing the viewable viewing angle range of the display panel; the first light shielding layer 6 close to the display backboard 100 will not affect the emission of inclined light even if it is arranged to be wider, and the first light shielding layer 6 can make up for the insufficient light shielding caused by the second light shielding layer 8 being arranged to be narrower.

[0061] The display backboard 100 can be an OLED (Organic Electroluminescence Display) display backboard 100, a QLED (Quantum Dot Light Emitting Diodes) display backboard 100, a Micro-LED (Micro-light emitting diode) display backboard 100, etc.; The display backboard 100 has a light emitting side and a non-light emitting side, the light emitting side and the non-light emitting side are arranged opposite to each other, and the light emitting side can display a picture, one side of the display picture is a display surface.

[0062] The following will be described taking OLED display backboard 100 as an example.

[0063] In the present example embodiment, as shown in FIG. 2, the display backboard 100 can include a substrate substrate 1, a driving substrate 2, a light emitting substrate 3, and an encapsulation layer group 4. The driving substrate 2 can drive the light emitting substrate 3 to emit light. The driving substrate 2 is arranged on one side of the substrate substrate 1, and the light emitting substrate 3 is arranged on the side of the driving substrate 2 away from the substrate 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, and the driving circuit can drive the light emitting device to emit light. The encapsulation layer group 4 is arranged on the side of the light emitting substrate 3 away from the substrate substrate 1.

[0064] In the present example embodiment, referring to FIG. 2, the material of the substrate 1 can include an inorganic material, for example, the inorganic material can be glass, quartz, metal, or the like. The material of the substrate 1 can also include an organic material, for example, the organic material can be a resin material such as polyimide, polycarbonate, polyacrylate, polyetherimide, polyethersulfone, polyethylene terephthalate, and polyethylene naphthalate. The substrate 1 can be formed of 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-described materials. Of course, the substrate 1 can also be provided as a single layer, and can be any of the above-described materials.

[0065] Specifically, referring to FIG. 2, a shielding layer 21 can be provided on one side of the substrate 1. Light rays that enter the active layer from the 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 that enter from the 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 thin film transistor, the shielding layer 21 can be omitted.

[0066] A buffer layer 22 can also be formed on the side of the shielding layer 21 away from the substrate 1. The buffer layer 22 can function to block water vapor and impurity ions in the substrate 1 (particularly, an organic material), and to add hydrogen ions to the active layer formed subsequently. The buffer layer 22 can be an insulating material that insulates and separates 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 substrate 1 or process conditions, the buffer layer 22 can be omitted.

[0067] The active layer can include a channel portion 231 and conductor portions provided at both ends of the channel portion 231, one of the two conductor portions being a source connection portion 232 and the other being a drain connection portion 233. A gate insulating layer 24 can be provided on the side of the active layer away from the substrate 1, and a gate layer 25 can be provided on the side of the gate insulating layer 24 away from the substrate 1. The gate layer 25 can include a gate 251 and a gate line (not shown in the figure).

[0068] An interlayer dielectric layer 26 is provided on the side of the gate layer 25 facing away from the substrate 1, and a via is provided in the interlayer dielectric layer 26, the via being connected to the source connection portion 232 and the drain connection portion 233; a first connection conductor layer 27 is provided on the side of the interlayer dielectric layer 26 facing away from the substrate 1, and the first connection conductor layer 27 can include a source 271, a drain 272, and a data line (not shown in the figure), the data line can be connected to the source 271, or the data line can be part of the source 271; the source 271 is connected to the source connection portion 232 through the via in the interlayer dielectric layer 26, and the drain 272 is connected to the drain connection portion 233 through the via in the interlayer dielectric layer 26.

[0069] In some other example embodiments 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 via is also provided in 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 271 and / or a second drain 272, the second source 271 and the second drain 272 are connected to the source 271 and the drain 272, respectively, through the via in the passivation layer. Of course, a third connection conductor layer, a fourth connection conductor layer, and the like can also be provided as needed.

[0070] 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 via is provided in the first planarization layer 28, the via being connected to the drain 272. The channel portion 231, the gate 251, the source 271, and the drain 272 form a thin film transistor.

[0071] It should be noted that the thin film transistor described in the present specification is a top-gate thin film transistor, and in some other example embodiments of the present disclosure, the thin film transistor can also be a bottom-gate thin film transistor or a dual-gate thin film transistor, 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 operation of the circuit, 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.

[0072] 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.

[0073] 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 via, the driving signal is provided to the first electrode 31 through the drain 272, and the first electrode 31 can be an anode (pixel electrode).

[0074] A pixel definition layer 32 is disposed on the side of the first electrode 31 away from the substrate 1, and a pixel opening portion 321 is disposed on the pixel definition layer 32, which is in communication with the first electrode 31, i.e., such 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, e.g., black ink. By means of the pixel definition layer 32, stray light can be absorbed, and the display effect can be improved.

[0075] A light-emitting layer group 33 is disposed on the side of the pixel definition layer 32 away from the substrate 1, and at least part of the light-emitting layer group 33 is located within the pixel opening portion 321. A second electrode 34, which can be a cathode (common electrode), is disposed on the side of the light-emitting layer group 33 away from the substrate 1. The light-emitting layer group 33 within one pixel opening portion 321 emits light to form one sub-pixel 35, such that the orthographic projection of the sub-pixel 35 on the substrate 1 is the orthographic projection of the light-emitting layer group 33 within the pixel opening portion 321 on the substrate 1.

[0076] It should be noted that, since the sidewall of the slot of the pixel opening portion 321 of the pixel definition layer 32 is inclined, the sub-pixel 35 refers to the range of the bottom wall of the slot of the pixel opening portion 321 of the pixel definition layer 32, i.e., the sub-pixel 35 refers to the range enclosed by the edge of the pixel opening portion 321 of the pixel definition layer 32 on the side close to the substrate 1.

[0077] The light-emitting layer group 33 can include, in sequence, a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, and an electron injection layer, the hole injection layer being in contact with the first electrode 31, and the electron injection layer being in contact with the second electrode 34. Of course, in other example embodiments of the present disclosure, the light-emitting layer group 33 can include only the hole transport layer, the light-emitting layer, and the electron transport layer, and the light-emitting layer group 33 can also have other structures, the specific structure of which can be set as needed.

[0078] The display backplane 100 can further include an encapsulation layer group 4, which is disposed on the side of the second electrode 34 away from the substrate 1, and is used to encapsulate the display backplane 100, so as to prevent water vapor, impurities, etc. from the outside from entering the inside of the display backplane 100 and affecting the display effect of the display backplane 100. The encapsulation layer group 4 can be provided in multiple layers, and can include an organic layer 42 and an inorganic layer. Specifically, the encapsulation layer group 4 can include a first inorganic layer 41, an organic layer 42 disposed on the side of the first inorganic layer 41 away from the substrate 1, and a second inorganic layer 43 disposed on the side of the organic layer 42 away from the substrate 1. The materials of the first inorganic layer 41, the organic layer 42, and the second inorganic layer 43 are not described herein again. Of course, the encapsulation layer group 4 can also include more layers or fewer layers.

[0079] In some example embodiments of the present disclosure, the display back plate 100 can further include a touch layer group 5 disposed on the side of the encapsulation layer group 4 away from the substrate substrate 1, which enables the display panel to realize touch function. Of course, the touch layer group 5 can also not be provided.

[0080] In the example embodiment, a first light shielding layer 6 is provided on the light-emitting side of the display back plate 100, for example, on the side of the touch layer group 5 away from the substrate substrate 1 when the touch layer group 5 is provided; referring to FIG. 1, the first light shielding layer 6 is provided on the side of the encapsulation layer group 4 away from the substrate substrate 1 when the touch layer group 5 is not provided. The thickness of the first light shielding layer 6 is greater than or equal to 1 micrometer and less than or equal to 1.5 micrometers, for example, the thickness of the first light shielding layer 6 can be 1.05 micrometers, 1.1 micrometers, 1.15 micrometers, 1.2 micrometers, 1.25 micrometers, 1.3 micrometers, 1.35 micrometers, 1.4 micrometers, 1.45 micrometers, and the like.

[0081] A plurality of first vias 61 are provided on the first light shielding layer 6, and the sub-pixel 35 is located within the orthographic projection of the first via 61 on the display back plate 100, for example, the edge line of the sub-pixel 35 can coincide with the edge line of the orthographic projection of the first via 61 on the display back plate 100, that is, the sub-pixel 35 and the orthographic projection of the first via 61 on the display back plate 100 completely coincide; or the orthographic projection of the first via 61 on the display back plate 100 completely covers the sub-pixel 35, and the area of the orthographic projection of the first via 61 on the display back plate 100 is greater than the area of the sub-pixel 35. Such arrangement avoids the influence of the first light shielding layer 6 on the light emission of the sub-pixel 35.

[0082] Specifically, the distance between the edge line of the sub-pixel 35 and the edge line of the orthographic projection of the first via 61 on the display back plate 100 is greater than or equal to 2 micrometers and less than or equal to 8 micrometers, for example, the distance between the edge line of the sub-pixel 35 and the edge line of the orthographic projection of the first via 61 on the display back plate 100 can be 2.3 micrometers, 2.5 micrometers, 2.8 micrometers, 3 micrometers, 3.2 micrometers, 3.5 micrometers, 3.7 micrometers, 4 micrometers, 4.3 micrometers, 4.5 micrometers, 4.8 micrometers, 5 micrometers, 5.2 micrometers, 5.5 micrometers, 5.7 micrometers, 6 micrometers, 6.3 micrometers, 6.5 micrometers, 6.8 micrometers, 7 micrometers, 7.2 micrometers, 7.5 micrometers, 7.7 micrometers, and the like.

[0083] In the process of manufacturing the first via hole 61 on the first light shielding layer 6, due to the error of equipment, the error of process, and other reasons, the position of the first via hole 61 formed will always have a certain error with the position of the designed (ideal state) first via hole 61. Therefore, if the distance between the edge line of the sub-pixel 35 and the edge line of the orthographic projection of the first via hole 61 on the display backboard 100 is too small, the first via hole 61 will be offset due to the above-mentioned error, causing the first light shielding layer 6 to cover the sub-pixel 35, thereby shielding the light emission of the sub-pixel 35.

[0084] If the distance between the edge line of the sub-pixel 35 and the edge line of the orthographic projection of the first via hole 61 on the display backboard 100 is too large, the width of the first light shielding layer 6 between the two adjacent sub-pixels 35 is too small, the shielding effect of the first light shielding layer 6 on the light between the adjacent sub-pixels 35 is weak, and light leakage, color mixing, and reduced display contrast may occur.

[0085] The above-mentioned numerical range ensures that the first light shielding layer 6 will not cover the sub-pixel 35 even if the first via hole 61 is offset, ensuring the light emission efficiency of the sub-pixel 35, and ensuring the shielding effect of the first light shielding layer 6 on the light between the adjacent sub-pixels 35, reducing light leakage, color mixing, and reduced display contrast.

[0086] Furthermore, as shown in FIG. 3, the orthographic projection of the first via hole 61 on the display backboard 100 is a first area 1001, and the other area of the display backboard 100 is a second area 1002, that is, the display backboard 100 has the first area 1001 and the second area 1002, the first area 1001 is the area covered by the orthographic projection of the first via hole 61 on the display backboard 100, and the second area 1002 is the area not covered by the orthographic projection of the first via hole 61 on the display backboard 100. The first area 1001 is arranged in multiple intervals, and the second area 1002 is connected to form a piece.

[0087] It should be noted that the display backboard 100 here can refer to the display area of the display backboard 100, and the relationship between the non-display area around the display area and the orthographic projection of the first via hole 61 on the display backboard 100 is not limited.

[0088] In the example embodiment, please continue to refer to FIG. 1, the filter layer 7 is arranged on the side of the first light shielding layer 6 away from the display backboard 100, and the sub-pixel 35 is located within the orthographic projection of the filter layer 7 on the display backboard 100. For example, the edge line of the sub-pixel 35 can coincide with the edge line of the orthographic projection of the filter layer 7 on the display backboard 100, that is, the sub-pixel 35 completely coincides with the orthographic projection of the filter layer 7 on the display backboard 100. Alternatively, the orthographic projection of the filter layer 7 on the display backboard 100 completely covers the sub-pixel 35, and the area of the orthographic projection of the filter layer 7 on the display backboard 100 is greater than the area of the sub-pixel 35. In this way, the light emitted by the sub-pixel 35 can be emitted through the filter layer 7, and the light can be filtered through the filter layer 7 to achieve monochromatic (red, green, and blue) display.

[0089] In the example embodiment, please refer to FIG. 1 and FIG. 5, the second light shielding layer 8 is arranged on the side of the first light shielding layer 6 away from the display backboard 100, and the second light shielding layer 8 is provided with a plurality of second through holes 81. The orthographic projection of the second light shielding layer 8 on the display backboard 100 overlaps the orthographic projection of the first light shielding layer 6 on the display backboard 100, and together covers the second area 1002, that is, the orthographic projection of the second light shielding layer 8 on the display backboard 100 and the orthographic projection of the first light shielding layer 6 on the display backboard 100 together cover the second area 1002, but do not cover the first area 1001.

[0090] In this way, the first light shielding layer 6 and the second light shielding layer 8 together form a black matrix (BM). By jointly shielding the space between adjacent sub-pixels 35 through the first light shielding layer 6 and the second light shielding layer 8, light leakage of the display panel is prevented, color mixing between adjacent sub-pixels 35 is prevented, display contrast is improved, and the influence of light on the thin film transistor area is effectively prevented, thereby maintaining display stability and accuracy.

[0091] The second light shielding layer 8 arranged above the first light shielding layer 6 can shield more stray light from the display panel, so that the dark state is excellent and the one-body black effect is improved.

[0092] Moreover, simulation shows that the reflectivity is about 6.51%, which is much lower than the reflectivity of about 7.3% in the prior art. The color phase a* is about -0.38, which is closer to 0 than -2 in the prior art. The color phase b* is about -1.77, which is closer to 0 than -2 in the prior art, and the dark state one-body black effect is better.

[0093] Further, the orthographic projection of the second via hole 81 on the display back plate 100 covers the orthographic projection of the first via hole 61 on the display back plate 100, and the area of the orthographic projection of the second via hole 81 on the display back plate 100 is greater than the area of the orthographic projection of the first via hole 61 on the display back plate 100; that is, the first via hole 61 is set to be smaller, so that the width of the first light shielding layer 6 between adjacent sub-pixels 35 is greater, and the second via hole 81 is set to be larger, so that the width of the second light shielding layer 8 between adjacent sub-pixels 35 is smaller; the second light shielding layer 8 is set to be narrower away from the display back plate 100, so that more oblique light can be emitted out of the display panel, thereby reducing the side viewing angle luminance decay and increasing the viewable viewing angle range of the display panel; even if the first light shielding layer 6 is set to be wider close to the display back plate 100, it will not affect the emission of oblique light, and the first light shielding layer 6 can make up for the insufficient light shielding caused by the second light shielding layer 8 being set to be narrower.

[0094] Referring to FIG. 1, the dashed line in the figure represents the light shielding layer in the related art, which is set to one layer and is disposed on the side of the light filtering layer 7 away from the substrate 1, and the dashed arrow in the figure represents the light with the largest oblique angle emitted out of the display panel in the related art, and the solid arrow represents the light with the largest oblique angle emitted out of the display panel in the present disclosure. It can be seen from the figure that the present disclosure can increase a on the single side viewing angle compared with the related art.

[0095] It should be noted that, since the hole side wall of the first via hole 61 is inclined, the range of the orthographic projection of the first via hole 61 on the display back plate 100 refers to the orthographic projection of the side of the first via hole 61 close to the display back plate 100 (the hole bottom wall) on the display back plate 100; similarly, since the hole side wall of the second via hole 81 is inclined, the range of the orthographic projection of the second via hole 81 on the display back plate 100 refers to the orthographic projection of the side of the second via hole 81 close to the display back plate 100 (the hole bottom wall) on the display back plate 100.

[0096] In the present example embodiment, referring to FIG. 1, the light adjusting layer 9 is disposed on the side of the first light shielding layer 6 away from the display back plate 100, and the light adjusting layer 9 covers the first light shielding layer 6, that is, the light adjusting layer 9 can completely cover the first light shielding layer 6. In this case, the second light shielding layer 8 is disposed on the side of the light adjusting layer 9 away from the display back plate 100, that is, the first light shielding layer 6, the light adjusting layer 9, and the second light shielding layer 8 are sequentially stacked away from the display back plate 100.

[0097] The thickness of the light adjusting layer 9 is greater than or equal to 1.5 microns and less than or equal to 2.5 microns, for example, the thickness of the light adjusting layer 9 can be 1.55 microns, 1.6 microns, 1.65 microns, 1.7 microns, 1.75 microns, 1.8 microns, 1.85 microns, 1.9 microns, 1.95 microns, 2 microns, 2.05 microns, 2.1 microns, 2.15 microns, 2.2 microns, 2.25 microns, 2.3 microns, 2.35 microns, 2.4 microns, 2.45 microns, and the like.

[0098] If the thickness of the light adjusting layer 9 is too thin, the light adjusting layer 9 is not enough to cover the first light shielding layer 6, resulting in that the light adjusting layer 9 and the filter layer 7 cannot form a total reflection interface at some positions, which is not conducive to improving the front light efficiency of the display panel.

[0099] If the thickness of the light adjusting layer 9 is too thick, it is not conducive to the subsequent formation of the filter layer 7 to climb, and it also causes the thickness of the display panel to be relatively thick, which is not conducive to the lightweight setting of the display panel.

[0100] The above numerical range not only ensures that the light adjusting layer 9 is enough to cover the first light shielding layer 6, and the light adjusting layer 9 can form a total reflection interface with the filter layer 7, which is conducive to improving the front light efficiency of the display panel; but also conducive to the subsequent formation of the filter layer 7 to climb, which is conducive to the lightweight setting of the display panel.

[0101] The light adjusting layer 9 is provided with a plurality of recesses 91. The recess 91 can be a through hole provided on the light adjusting layer 9, so that the light adjusting layer 9 does not cover the encapsulation layer group 4 or the touch layer group 5 at the position of the recess 91. Of course, in some other example embodiments of the present disclosure, the recess 91 can be a blind hole provided on the light adjusting layer 9, that is, the bottom wall of the recess 91 is still the light adjusting layer 9, only the thickness of the light adjusting layer 9 at the position of the recess 91 is relatively thin.

[0102] Referring to FIG. 6, the sub-pixel 35 is located within the orthographic projection of the recess 91 on the display backplane 100, for example, the edge line of the sub-pixel 35 can coincide with the edge line of the orthographic projection of the recess 91 on the display backplane 100, that is, the sub-pixel 35 and the orthographic projection of the recess 91 on the display backplane 100 completely coincide; or the orthographic projection of the recess 91 on the display backplane 100 can completely cover the sub-pixel 35, and the area of the orthographic projection of the recess 91 on the display backplane 100 is greater than the area of the sub-pixel 35.

[0103] Moreover, the light adjusting layer 9 is basically provided in an integral layer, and no other via holes and gaps and the like are provided on the light adjusting layer 9 except for the recess 91.

[0104] It should be noted that, since the groove sidewall of the recess 91 is inclined, the range of the orthographic projection of the recess 91 on the display backboard 100 refers to the orthographic projection on the display backboard 100 of the side of the recess 91 close to the display backboard 100 (the groove bottom wall).

[0105] Specifically, the distance between the edge line of the sub-pixel 35 and the edge line of the orthographic projection of the recess 91 on the display backboard 100 is greater than or equal to 0 and less than or equal to 2 microns, for example, the distance between the edge line of the sub-pixel 35 and the edge line of the orthographic projection of the recess 91 on the display backboard 100 can be 0.3 microns, 0.5 microns, 0.8 microns, 1 micron, 1.2 microns, 1.5 microns, 1.7 microns, etc.

[0106] In the process of preparing the recess 91 on the light adjusting layer 9, due to the error of the equipment, the error of the process, etc., there will be a certain error between the position of the recess 91 prepared and the position of the recess 91 designed (ideal state). Therefore, if the distance between the edge line of the sub-pixel 35 and the edge line of the orthographic projection of the recess 91 on the display backboard 100 is too small, the recess 91 will be offset due to the above-mentioned error, causing the light adjusting layer 9 to cover the sub-pixel 35, thereby shielding the light emission of the sub-pixel 35.

[0107] If the distance between the edge line of the sub-pixel 35 and the edge line of the orthographic projection of the recess 91 on the display backboard 100 is too large, the remaining part of the light adjusting layer 9 is too narrow to cover the first light shielding layer 6, causing the light adjusting layer 9 and the light filtering layer 7 to fail to form a total reflection interface at some positions, thereby being not conducive to improving the front light emission efficiency of the display panel.

[0108] The above numerical range ensures that the light adjusting layer 9 will not cover the sub-pixel 35 even if the recess 91 is offset, ensuring the light emission efficiency of the sub-pixel 35; and ensures that the light adjusting layer 9 is sufficient to cover the first light shielding layer 6, and the light adjusting layer 9 can form a total reflection interface with the light filtering layer 7, which is conducive to improving the front light emission efficiency of the display panel.

[0109] At least part of the light filtering layer 7 is arranged in the recess 91, for example, the light filtering layer 7 can be arranged only in the recess 91, or part of the light filtering layer 7 can be arranged in the recess 91, and another part of the light filtering layer 7 can be arranged outside the recess 91 and on the side of the light adjusting layer 9 away from the display backboard 100. In this way, the light emitted by the sub-pixel 35 is basically emitted through the light filtering layer 7, and the light filtering layer 7 can filter the light to achieve monochrome (red, green, and blue) display.

[0110] Moreover, the refractive index of the light filtering layer 7 is greater than the refractive index of the light adjusting layer 9, specifically, the refractive index of the light filtering layer 7 is greater than or equal to 1.65 and less than or equal to 1.85, for example, the refractive index of the light filtering layer 7 can be 1.67, 1.7, 1.73, 1.75, 1.78, 1.8, 1.82, and the like; the refractive index of the light adjusting layer 9 is greater than or equal to 1.4 and less than or equal to 1.55, for example, the refractive index of the light adjusting layer 9 can be 1.42, 1.45, 1.47, 1.5, 1.53, and the like.

[0111] In this way, the light from the light filtering layer 7 to the light adjusting layer 9 is from a denser medium to a rarer medium, and the light with a larger tilt angle has a larger incident angle on the side wall of the recess 91, which is likely to exceed the critical angle of total reflection and cause total reflection, thereby changing the optical path of the light with a larger tilt angle, so that the light with a larger tilt angle can also be emitted from the front of the display panel, thereby increasing the front light efficiency of the display panel, and reducing the light efficiency of the side of the display panel, thereby reducing color deviation and the like.

[0112] Moreover, simulation shows that the power consumption gain can reach 37.8%, which is about 8% higher than the power consumption gain of about 29.9% in the prior art, thereby effectively reducing the power consumption under the condition of achieving the same brightness.

[0113] In some example embodiments of the present disclosure, referring to FIGS. 1 and 3, the first light shielding layer 6 can include a plurality of first light shielding rings 62, which are arranged one-to-one with the sub-pixels 35. The orthogonal projection of the first light shielding ring 62 on the display backplane 100 is annular; and the orthogonal projection of the first light shielding ring 62 on the display backplane 100 is adapted to the sub-pixel 35, for example, the sub-pixel 35 is circular, and the orthogonal projection of the first light shielding ring 62 on the display backplane 100 is a circular ring; the sub-pixel 35 is rectangular, and the orthogonal projection of the first light shielding ring 62 on the display backplane 100 is a rectangular ring; the sub-pixel 35 is elliptical, and the orthogonal projection of the first light shielding ring 62 on the display backplane 100 is an elliptical ring. The inner ring of the first light shielding ring 62 is the first via hole 61.

[0114] Specifically, the ring width of the first light shielding ring 62 is greater than or equal to 2 microns and less than or equal to 4 microns, for example, the ring width of the first light shielding ring 62 can be 2.3 microns, 2.5 microns, 2.8 microns, 3 microns, 3.2 microns, 3.5 microns, 3.8 microns, and the like.

[0115] If the ring width of the first light-shielding ring 62 is too small, the first light-shielding ring 62 cannot form a black matrix together with the second light-shielding layer 8, and cannot shield the space between adjacent sub-pixels 35. If the ring width of the first light-shielding ring 62 is too large, the width of the first gap 63 between two adjacent first light-shielding rings 62 is too small, and the height of the second light-shielding layer 8 cannot be effectively reduced, and the side viewing angle brightness decay cannot be effectively reduced.

[0116] The above numerical range not only ensures that the first light-shielding layer 6 can form a black matrix together with the second light-shielding layer 8 and shield the space between adjacent sub-pixels 35, but also effectively reduces the height of the second light-shielding layer 8, thereby reducing the side viewing angle brightness decay.

[0117] In addition, as shown in FIGS. 1 and 3, a first gap 63 is arranged between two adjacent first light-shielding rings 62, that is, the two adjacent first light-shielding rings 62 are not connected, so that after the light adjusting layer 9 covers the first light-shielding layer 6, the recess structure 92 is arranged on the light adjusting layer 9, and the orthographic projection of the recess structure 92 on the display backplane 100 is located within the orthographic projection of the first gap 63 on the display backplane 100. For example, the edge line of the orthographic projection of the recess structure 92 on the display backplane 100 can coincide with the edge line of the orthographic projection of the first gap 63 on the display backplane 100, or the orthographic projection of the second light-shielding layer 8 on the display backplane 100 can cover the orthographic projection of the first gap 63 on the display backplane 100, and the area of the orthographic projection of the second light-shielding layer 8 on the display backplane 100 is greater than the area of the orthographic projection of the first gap 63 on the display backplane 100.

[0118] In this case, at least part of the second light-shielding layer 8 is arranged in the recess structure 92, for example, all of the second light-shielding layer 8 can be arranged in the recess structure 92, or part of the second light-shielding layer 8 can be arranged in the recess structure 92.

[0119] The orthographic projection of the first gap 63 on the display backplane 100 is located within the orthographic projection of the second light-shielding layer 8 on the display backplane 100, for example, the edge line of the orthographic projection of the first gap 63 on the display backplane 100 can coincide with the edge line of the orthographic projection of the second light-shielding layer 8 on the display backplane 100, or the orthographic projection of the second light-shielding layer 8 on the display backplane 100 can cover the orthographic projection of the first gap 63 on the display backplane 100, and the area of the orthographic projection of the second light-shielding layer 8 on the display backplane 100 is greater than the area of the orthographic projection of the first gap 63 on the display backplane 100.

[0120] In the example embodiment, a part of the second light shielding layer 8 is arranged in the recessed structure 92, and another part of the second light shielding layer 8 is arranged outside the recessed structure 92. In this way, the first light shielding layer 6 and the second light shielding layer 8 can jointly form a black matrix, and the space between the adjacent sub-pixels 35 is shielded by the first light shielding layer 6 and the second light shielding layer 8, so as to avoid the light leakage caused by the gap between the orthographic projection of the first light shielding layer 6 on the display backboard 100 and the orthographic projection of the second light shielding layer 8 on the display backboard 100.

[0121] In addition, in this way, the first distance can be less than or equal to the second distance, the distance between the side of the second light shielding layer 8 facing away from the display backboard 100 and the display backboard 100 is the first distance, and the distance between the side of the filter layer 7 facing away from the display backboard 100 and the display backboard 100 is the second distance. That is, the thickness of the part of the second light shielding layer 8 covering the light adjusting layer 9 and not arranged in the recessed structure 92 can be set to be thinner, so that more inclined light can be emitted from the display panel, thereby reducing the side viewing angle luminance decay and increasing the viewable viewing angle range of the display panel. Of course, in some other example embodiments of the present disclosure, the first distance can also be greater than the second distance, that is, the side of the second light shielding layer 8 facing away from the display backboard 100 can protrude from the side of the filter layer 7 facing away from the display backboard 100.

[0122] In addition, referring to FIG. 7, in some other example embodiments of the present disclosure, at least part of the two adjacent first light shielding rings 62 can be connected as a whole, that is, all of the two adjacent first light shielding rings 62 can be connected as a whole, or part of the two adjacent first light shielding rings 62 can be connected as a whole, and the other part of the two adjacent first light shielding rings 62 can not be connected as a whole; for example, when the distance between the two adjacent first light shielding rings 62 is close, the two adjacent first light shielding rings 62 can be connected as a whole; when the distance between the two adjacent first light shielding rings 62 is far, the first gap 63 can be arranged between the two adjacent first light shielding rings 62.

[0123] In this case, referring to FIG. 4, the second via hole 81 has a third area 1003 on the display backboard 100 in orthographic projection, and other areas of the display backboard 100 are fourth areas 1004, that is, the display backboard 100 has the third area 1003 and the fourth area 1004, the third area 1003 is an area covered by the orthographic projection of the second via hole 81 on the display backboard 100, and the fourth area 1004 is an area not covered by the orthographic projection of the second via hole 81 on the display backboard 100. The third area 1003 is arranged in multiple intervals, and the fourth area 1004 is connected to form a piece. The orthographic projection of the second light shielding layer 8 on the display backboard 100 coincides with the fourth area 1004, that is, the orthographic projection of the second light shielding layer 8 on the display backboard 100 completely covers the fourth area 1004, so that the second light shielding layer 8 is basically arranged as a whole layer, and no other via holes, gaps, etc. are arranged on the second light shielding layer 8 except for the second via hole 81. In this way, the first light shielding layer 6 and the second light shielding layer 8 can jointly form a black matrix, and the space between adjacent sub-pixels 35 is shielded by the first light shielding layer 6 and the second light shielding layer 8, thereby avoiding light leakage caused by the gap between the orthographic projection of the first light shielding layer 6 on the display backboard 100 and the orthographic projection of the second light shielding layer 8 on the display backboard 100.

[0124] It should be noted that the display backboard 100 here can refer to the display area of the display backboard 100, and the relationship between the non-display area around the display area and the orthographic projection of the first via hole 61 and the second via hole 81 on the display backboard 100 is not limited.

[0125] Of course, in some other example embodiments of the present disclosure, referring to FIG. 8, the orthographic projection of the first light shielding layer 6 on the display backboard 100 can coincide with the second area 1002, that is, the orthographic projection of the first light shielding layer 6 on the display backboard 100 completely covers the second area 1002, so that the first light shielding layer 6 is basically arranged as a whole layer, and no other via holes, gaps, etc. are arranged on the first light shielding layer 6 except for the first via hole 61. In this way, the first light shielding layer 6 and the second light shielding layer 8 can jointly form a black matrix, and the space between adjacent sub-pixels 35 is shielded by the first light shielding layer 6 and the second light shielding layer 8, thereby avoiding light leakage caused by the gap between the orthographic projection of the first light shielding layer 6 on the display backboard 100 and the orthographic projection of the second light shielding layer 8 on the display backboard 100.

[0126] In this case, referring to FIG. 9, the second light shielding layer 8 can include a plurality of second light shielding rings 82, which are arranged in one-to-one correspondence with the sub-pixels 35. The second light shielding ring 82 has a ring shape in orthographic projection on the display backplane 100; and the orthographic projection of the second light shielding ring 82 on the display backplane 100 is adapted to the sub-pixel 35, for example, the sub-pixel 35 is arranged in a circular shape, and the orthographic projection of the second light shielding ring 82 on the display backplane 100 is arranged in a circular ring shape; the sub-pixel 35 is arranged in a rectangular shape, and the orthographic projection of the second light shielding ring 82 on the display backplane 100 is arranged in a rectangular ring shape; the sub-pixel 35 is arranged in an elliptical shape, and the orthographic projection of the second light shielding ring 82 on the display backplane 100 is arranged in an elliptical ring shape. The inner ring of the second light shielding ring 82 is the second via hole 81.

[0127] Further, a second gap 83 is arranged between adjacent two second light shielding rings 82, that is, adjacent two second light shielding rings 82 are not connected.

[0128] Of course, in some other example embodiments of the present disclosure, referring to FIG. 10, at least part of adjacent two second light shielding rings 82 can be connected as a whole, that is, all adjacent two second light shielding rings 82 can be connected as a whole, or part of adjacent two second light shielding rings 82 can be connected as a whole, and another part of adjacent two second light shielding rings 82 can not be connected as a whole; for example, in the case that the distance between adjacent two second light shielding rings 82 is close, the adjacent two second light shielding rings 82 are connected as a whole; in the case that the distance between adjacent two second light shielding rings 82 is far, a second gap 83 can be arranged between the adjacent two second light shielding rings 82.

[0129] In addition, in some other example embodiments of the present disclosure, the first light-shielding layer 6 can have a normal projection on the display backplane 100 that coincides with the second area 1002, i.e., the normal projection of the first light-shielding layer 6 on the display backplane 100 completely covers the second area 1002, so that the first light-shielding layer 6 is substantially provided as a whole layer, and no other via holes and gaps are provided on the first light-shielding layer 6 except for the first via hole 61. Moreover, the normal projection of the second light-shielding layer 8 on the display backplane 100 coincides with the fourth area 1004, i.e., the normal projection of the second light-shielding layer 8 on the display backplane 100 completely covers the fourth area 1004, so that the second light-shielding layer 8 is substantially provided as a whole layer, and no other via holes and gaps are provided on the second light-shielding layer 8 except for the second via hole 81. That is, in this example embodiment, the first light-shielding layer 6 and the second light-shielding layer 8 are substantially provided as whole layers, i.e., the structure of the second light-shielding layer 8 in FIG. 4 cooperates with the first light-shielding layer 6 in FIG. 8. In this way, the first light-shielding layer 6 and the second light-shielding layer 8 can further jointly form a black matrix, and the space between adjacent sub-pixels 35 can be shielded by the first light-shielding layer 6 and the second light-shielding layer 8, so as to avoid light leakage caused by the gap between the normal projection of the first light-shielding layer 6 on the display backplane 100 and the normal projection of the second light-shielding layer 8 on the display backplane 100.

[0130] Referring to FIGS. 11 and 12, the filter layer 7 can include a first filter portion 71, a second filter portion 72, and a third filter portion 73, the filter colors of the first filter portion 71, the second filter portion 72, and the third filter portion 73 being different from each other. For example, the first filter portion 71 can be a red filter portion, the second filter portion 72 can be a green filter portion, and the third filter portion 73 can be a blue filter portion.

[0131] At least two of the first filter part 71, the second filter part 72 and the third filter part 73 extend to the side of the light adjusting layer 9 away from the display backboard 100 and are stacked to form the second light shielding layer 8. For example, as shown in FIG. 11, all of the first filter part 71, the second filter part 72 and the third filter part 73 can extend to the side of the light adjusting layer 9 away from the display backboard 100 and are stacked to form the second light shielding layer 8. As shown in FIG. 12, the filter parts of two adjacent sub-pixels 35 can extend to the side of the light adjusting layer 9 away from the display backboard 100 and are stacked to form the second light shielding layer 8. For example, for the green sub-pixel 35G, the side is adjacent to the red sub-pixel 35R, so the red filter part and the green filter part are stacked to form the second light shielding layer 8 on this side, i.e., the first filter part 71 and the second filter part 72 are stacked to form the second light shielding layer 8 on this side. The other side is adjacent to the blue sub-pixel 35B, so the green filter part and the blue filter part are stacked to form the second light shielding layer 8 on this side, i.e., the second filter part 72 and the third filter part 73 are stacked to form the second light shielding layer 8 on this side. In this way, the number of mask processes for forming the second light shielding layer 8 can be reduced, the cost can be reduced, and the production efficiency can be improved.

[0132] The principle of stacking at least two filter parts to form the second light shielding layer 8 is that a filter part can only transmit light of one color. For example, a red filter part can only transmit red light, a green filter part can only transmit green light, and a blue filter part can only transmit blue light. Therefore, after the green filter part and the blue filter part are stacked, the green light transmitted by the green filter part cannot pass through the blue filter part, thereby achieving the effect of light shielding.

[0133] In addition, when all of the first filter part 71, the second filter part 72 and the third filter part 73 extend to the side of the light adjusting layer 9 away from the display backboard 100 and are stacked to form the second light shielding layer 8, the first filter part 71, the second filter part 72 and the third filter part 73 can absorb most of the ambient light entering the inside of the display panel, reduce the reflection of light, thereby reducing the reflectivity, and facilitate the use of the display panel in strong ambient light.

[0134] Referring to FIG. 13, in some example embodiments of the present disclosure, the first light filtering part 71, the second light filtering part 72 and the third light filtering part 73 extend to the side of the adjacent light adjusting layer 9 away from the display backboard 100 and do not overlap, for example, the first light filtering part 71, the second light filtering part 72 and the third light filtering part 73 can extend to the side of the adjacent light adjusting layer 9 away from the display backboard 100, but a gap is provided between the adjacent first light filtering part 71 and the second light filtering part 72 or the first light filtering part 71 and the second light filtering part 72 are just connected, a gap is provided between the adjacent second light filtering part 72 and the third light filtering part 73 or the second light filtering part 72 and the third light filtering part 73 are just connected.

[0135] In this case, at least part of the second light shielding layer 8 is provided on the side of the light filtering layer 7 away from the display backboard 100, for example, in the case where a gap is provided between the adjacent first light filtering part 71 and the second light filtering part 72, part of the second light shielding layer 8 is provided in the gap, so that this part of the second light shielding layer 8 is located on the side of the light adjusting layer 9 away from the display backboard 100, and another part of the second light shielding layer 8 is provided on the side of the light filtering layer 7 away from the display backboard 100; in the case where the adjacent first light filtering part 71 and the second light filtering part 72 are just connected, the second light shielding layer 8 is provided on the side of the light filtering layer 7 away from the display backboard 100. Similarly, in the case where a gap is provided between the adjacent second light filtering part 72 and the third light filtering part 73, part of the second light shielding layer 8 is provided in the gap, so that this part of the second light shielding layer 8 is located on the side of the light adjusting layer 9 away from the display backboard 100, and another part of the second light shielding layer 8 is provided on the side of the light filtering layer 7 away from the display backboard 100; in the case where the adjacent second light filtering part 72 and the third light filtering part 73 are just connected, the second light shielding layer 8 is provided on the side of the light filtering layer 7 away from the display backboard 100.

[0136] Alternatively, the orthographic projection of the second light shielding layer 8 on the display backboard 100 does not overlap with the orthographic projection of the recess 91 on the display backboard 100, that is, the orthographic projection of the second light shielding layer 8 on the display backboard 100 is located within the orthographic projection of the top surface of the light adjusting layer 9 away from the display backboard 100 on the display backboard 100, for example, the edge line of the orthographic projection of the second light shielding layer 8 on the display backboard 100 can coincide with the edge line of the orthographic projection of the top surface of the light adjusting layer 9 away from the display backboard 100 on the display backboard 100, or the orthographic projection of the top surface of the light adjusting layer 9 away from the display backboard 100 on the display backboard 100 can cover the orthographic projection of the second light shielding layer 8 on the display backboard 100, and the area of the orthographic projection of the top surface of the light adjusting layer 9 away from the display backboard 100 on the display backboard 100 is greater than the area of the orthographic projection of the second light shielding layer 8 on the display backboard 100.

[0137] It should be noted that, since the recessed portion 91 is arranged on the light adjusting layer 9, the light adjusting layer 9 has a top surface and a side wall, the top surface is connected with the side wall, the side wall is the side wall of the recessed portion 91, and the top surface is the surface of the light adjusting layer 9 far away from the display backboard 100 and connected with the side wall; and in the case that the recessed structure 92 is arranged on the light adjusting layer 9, all the surfaces of the recessed structure 92 also belong to the top surface of the light adjusting layer 9.

[0138] In this way, the second light shielding layer 8 avoids shielding the side wall of the recessed portion 91 of the light adjusting layer 9 and shielding the total reflection light generated on the side wall of the recessed portion 91, so as to ensure the light extraction efficiency of the display panel.

[0139] Referring to FIGS. 14-17, in some example embodiments of the present disclosure, a plurality of grooves 74 are arranged on the light filtering layer 7, and the orthographic projection of the groove 74 on the display backboard 100 is located within the sub-pixel 35, for example, the orthographic projection of the groove 74 on the display backboard 100 only occupies a part of the sub-pixel 35.

[0140] In this case, the display panel can further include a planarization layer 10, the planarization layer 10 is arranged on the side of the light filtering layer 7 away from the display backboard 100, and a part of the planarization layer 10 fills the groove 74. Through the planarization layer 10, the surface of the display panel far away from the substrate substrate 1 can be made relatively flat, so as to provide a relatively flat plane for the cover plate.

[0141] Alternatively, the refractive index of the light filtering layer 7 is greater than the refractive index of the planarization layer 10. The refractive index of the light filtering layer 7 has been described in detail above, and thus will not be described here again. The refractive index of the planarization layer 10 is greater than or equal to 1.4 and less than or equal to 1.55, for example, the refractive index of the planarization layer 10 can be 1.42, 1.45, 1.47, 1.5, 1.53, etc.

[0142] Referring to FIG. 14, in this way, the light is emitted from the light filtering layer 7 to the planarization layer 10, which is from the optically dense medium to the optically sparse medium. The light will be refracted on the side wall of the recessed portion 91, and the incident angle is less than the refraction angle, so as to refract the oblique light to the normal viewing angle direction, thereby improving the light extraction efficiency at the normal viewing angle.

[0143] Further, the distance between the groove side wall of the groove 74 and the display backboard 100 in the second direction Y increases with the decrease of the distance between the edge line of the groove 74 and the display backboard 100 in the first direction X, so that the groove 74 forms a structure with an opening larger than the bottom.

[0144] It should be noted that in the present disclosure, the second direction Y is perpendicular to the display surface of the display backboard 100, that is, the second direction Y is perpendicular to the side of the display backboard 100 on which the first light shielding layer 6 is arranged; the first direction X is parallel to the display surface of the display backboard 100, that is, the first direction X is parallel to the side of the display backboard 100 on which the first light shielding layer 6 is arranged, and the first direction X is a plurality of directions, only one of which is schematically shown in the figure.

[0145] In some example embodiments of the present disclosure, referring to FIG. 18, the groove side wall of the groove 74 can include a curved surface; the groove side wall of the groove 74 can include a first portion 741, a second portion 742 and a third portion 743 which are sequentially and smoothly connected, the first portion 741 is closer to the display backboard 100 relative to the third portion 743, the second portion 742 is arranged as an inclined surface, the first portion 741 and the third portion 743 are arranged as arc surfaces, the first portion 741 can be arranged as a concave shape, and the third portion 743 can be arranged as a convex shape; specifically, the part of the groove side wall of the groove 74 close to the display backboard 100 can be a circular arc surface, the middle part of the groove side wall of the groove 74 can be arranged as an inclined surface, and the part of the groove side wall of the groove 74 away from the display backboard 100 can be a circular arc surface. In other example embodiments of the present disclosure, the groove side wall of the groove 74 can be arranged as an inclined surface, and the groove side wall of the groove 74 can only include the first portion 741 and the third portion 743 which are smoothly connected, but the groove side wall of the groove 74 is overall arranged as an inclined surface. The groove 74 with this structure is convenient to manufacture and reduces the process difficulty; and the planarization layer 10 can completely fill the groove 74, avoiding the generation of voids due to the failure of the planarization layer 10 to completely fill the groove 74, which can irregularly scatter light, thereby avoiding affecting the intensity and display effect of the display panel.

[0146] 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-mentioned display panels, and the specific structure of the display panel has been described in detail above, and thus will not be described here again.

[0147] 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, etc., and a person skilled in the art can select accordingly according to the specific use of the display device, which will not be described here again.

[0148] It should be noted that the display device includes other necessary components and components in addition to the display panel, such as a housing, a circuit board, a power cord, etc., and a person skilled in the art can supplement accordingly according to the specific use requirements of the display device, which will not be described here again.

[0149] 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 thus will not be described herein.

[0150] Other embodiments of the present disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the features disclosed herein. It is intended that the present application cover any and all variations of the present disclosure that come within the scope of the claims and their equivalents. It is intended that the specification and examples be considered exemplary only, with the true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. A display panel, wherein, The display panel comprises: a display backboard comprising a plurality of sub-pixels, the display backboard having a first area and a second area; a first light shielding layer provided on a light-emitting side of the display backboard, the first light shielding layer being provided with a plurality of first through holes, the sub-pixels being located within the orthographic projection of the first through holes on the display backboard, the orthographic projection of the first through holes on the display backboard being the first area, and other areas of the display backboard being the second area; a filter layer provided on a side of the first light shielding layer away from the display backboard, the sub-pixels being located within the orthographic projection of the filter layer on the display backboard; a second light shielding layer provided on a side of the first light shielding layer away from the display backboard, the second light shielding layer being provided with a plurality of second through holes, the orthographic projection of the second light shielding layer on the display backboard and the orthographic projection of the first light shielding layer on the display backboard overlapping each other and collectively covering the second area, the orthographic projection of the second through holes on the display backboard covering the orthographic projection of the first through holes on the display backboard, and the area of the orthographic projection of the second through holes on the display backboard being greater than the area of the orthographic projection of the first through holes on the display backboard.

2. The display panel of claim 1, wherein, The display panel further comprises: a light adjusting layer covering the first light shielding layer, the second light shielding layer being provided on a side of the light adjusting layer away from the display backboard, the light adjusting layer being provided with a plurality of recessed portions, the sub-pixels being located within the orthographic projection of the recessed portions on the display backboard, at least part of the filter layer being provided in the recessed portions, and the refractive index of the filter layer being greater than the refractive index of the light adjusting layer.

3. The display panel of claim 2, wherein, The first light shielding layer comprises a plurality of first light shielding rings, the orthographic projection of the first light shielding rings on the display backboard being annular, and the inner ring of the first light shielding rings being the first through holes.

4. The display panel of claim 3, wherein, A first gap is provided between adjacent two of the first light shielding rings, so that the light adjusting layer is provided with a recessed structure, the orthographic projection of the recessed structure on the display backboard being located within the orthographic projection of the first gap on the display backboard.

5. The display panel of claim 4, wherein, At least part of the second light shielding layer is provided in the recessed structure, and the orthographic projection of the first gap on the display backboard is located within the orthographic projection of the second light shielding layer on the display backboard.

6. The display panel of claim 5, wherein, The distance between the side of the second light shielding layer away from the display backboard and the display backboard is a first distance, the distance between the side of the filter layer away from the display backboard and the display backboard is a second distance, and the first distance is less than or equal to the second distance.

7. The display panel of claim 3, wherein, At least part of adjacent two of the first light shielding rings are connected as a whole.

8. The display panel of claim 3, wherein, The orthographic projection of the second through holes on the display backboard is a third area, other areas of the display backboard being a fourth area, and the orthographic projection of the second light shielding layer on the display backboard coincides with the fourth area.

9. The display panel of claim 2, wherein, The orthographic projection of the first light shielding layer on the display backboard coincides with the second area.

10. The display panel of claim 9, wherein, The second light shielding layer comprises a plurality of second light shielding rings, the orthographic projection of the second light shielding rings on the display backboard being annular, and the inner ring of the second light shielding rings being the second through holes.

11. The display panel of claim 10, wherein, Second gaps are arranged between two adjacent second light shielding rings, or at least part of two adjacent second light shielding rings are connected as a whole.

12. The display panel of claim 2, wherein, The first light shielding layer has a projection on the display backplane that coincides with the second area; the second via hole has a projection on the display backplane that is a third area, other areas of the display backplane are a fourth area, and the second light shielding layer has a projection on the display backplane that coincides with the fourth area.

13. The display panel of claim 2, wherein, The light filtering layer includes a first light filtering part, a second light filtering part, and a third light filtering part, the light filtering colors of the first light filtering part, the second light filtering part, and the third light filtering part are different from each other, and at least two of the first light filtering part, the second light filtering part, and the third light filtering part extend to a side of the light adjusting layer away from the display backplane and are arranged in a stack to form the second light shielding layer.

14. The display panel of claim 2, wherein, The light filtering layer includes a first light filtering part, a second light filtering part, and a third light filtering part, the first light filtering part, the second light filtering part, and the third light filtering part extend to a side of the light adjusting layer away from the display backplane and are arranged in a stack to form the second light shielding layer.

15. The display panel according to any one of claims 2 to 15, wherein The second light shielding layer has a projection on the display backplane that does not overlap with a projection of the recess on the display backplane.

16. The display panel according to any one of claims 1 to 15, wherein The light filtering layer is provided with a plurality of grooves, the projection of the grooves on the display backplane is located within the sub-pixel, and the display panel further includes: A planarization layer is arranged on a side of the light filtering layer away from the display backplane, and a part of the planarization layer fills the groove.

17. The display panel of claim 16, wherein, The refractive index of the light filtering layer is greater than the refractive index of the planarization layer.

18. The display panel of claim 16, wherein, The distance between the groove side wall of the groove and the display backplane in the second direction increases as the distance between the groove edge line of the groove and the display backplane in the first direction decreases, the first direction is parallel to the display backplane, and the second direction is perpendicular to the display backplane.

19. The display panel according to any one of claims 2 to 15, wherein The recess is a through hole arranged on the light adjusting layer.

20. A display device comprising: The display panel includes: The display panel of any one of claims 1-19.

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