Display panel and display device

Abstract

The present application provides a display panel and a display device. The display panel includes a light-emitting layer and a light-reflecting layer; the light-emitting layer includes a plurality of light-emitting units; the light-reflecting layer is disposed on the light-emitting side of the light-emitting layer; and the light-reflecting layer includes a plurality of light-reflecting structures, and a positive projection of one light-reflecting structure on the light-emitting layer is disposed around the periphery of one light-emitting unit; wherein, a first distance between a positive projection of a first type of light-reflecting structure among the plurality of light-reflecting structures on the light-emitting layer and the corresponding light-emitting unit is greater than a second distance between a positive projection of a second type of light-reflecting structure on the light-emitting layer and the corresponding light-emitting unit; and / or, a thickness of the first type of light-reflecting structure is less than a thickness of the second type of light-reflecting structure; wherein, a thickness of the light-emitting unit corresponding to the first type of light-reflecting structure is greater than a thickness of the light-emitting unit corresponding to the second type of light-reflecting structure. The display panel improves the problem of displaying alternating bright and dark mura stripes.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and in particular, to a display panel and a display device. Background Art

[0002] An Organic Light-Emitting Diode (OLED) display panel has advantages such as active light emission, good temperature characteristics, low power consumption, fast response, flexibility, ultra-thinness, and low cost, and is considered to have great application prospects in the field of display technologies.

[0003] However, during the evaporation process of an OLED display panel, the periodic arrangement of the magnet plates on the evaporator causes the evaporation mask (mask) to present a wavy shape. As a result, the gap between the mask and the glass substrate shows periodic changes, and thus the evaporation shadow area (shadow) shows periodic changes. Specifically, at the position where the magnet plate is arranged, since the shadow is small, the evaporation coating layer thickness of the light-emitting unit is relatively thick and the brightness is relatively bright; at the gap between two adjacent magnet plates, since the shadow is large, the evaporation coating layer thickness of the light-emitting unit is relatively thin and the brightness is relatively dim. Therefore, the manufactured display panel presents bright and dark alternating mura stripes. Summary of the Invention

[0004] The display panel and the display device provided in the present application can improve the problem that the display panel presents bright and dark alternating mura stripes.

[0005] To solve the above technical problem, a technical solution adopted in the present application is: to provide a display panel. The display panel includes: a light-emitting layer and a light-reflecting layer; the light-emitting layer includes a plurality of light-emitting units; the light-reflecting layer is disposed on the light-emitting side of the light-emitting layer; and the light-reflecting layer includes a plurality of light-reflecting structures, and a positive projection of one of the light-reflecting structures on the light-emitting layer is disposed around the periphery of one of the light-emitting units; wherein, a first distance between a positive projection of a first type of light-reflecting structure among the plurality of light-reflecting structures on the light-emitting layer and the corresponding light-emitting unit is greater than a second distance between a positive projection of a second type of light-reflecting structure on the light-emitting layer and the corresponding light-emitting unit; and / or, the thickness of the first type of light-reflecting structure is less than the thickness of the second type of light-reflecting structure; wherein, the thickness of the light-emitting unit corresponding to the first type of light-reflecting structure is greater than the thickness of the light-emitting unit corresponding to the second type of light-reflecting structure.

[0006] Among them, it further includes a substrate, and the light-emitting layer is disposed on the substrate; the light-reflecting layer further includes a main body layer, and the main body layer includes a plurality of main body parts connected in sequence; the light-reflecting structure is disposed in the main body layer, and the refractive index of the light-reflecting structure is less than that of the main body layer; during the evaporation process, a plurality of ferromagnetic elements of the evaporator are spaced apart along a preset direction, and one main body part corresponds to one ferromagnetic element; the main body part includes a first sub-main body part and a second sub-main body part arranged along the preset direction; along the preset direction, the orthographic projection of the center line of the first sub-main body part on the substrate coincides with the orthographic projection of the center line of the ferromagnetic element on the substrate, and the orthographic projection of the center line of the second sub-main body part on the substrate coincides with the orthographic projection of the center lines of two adjacent ferromagnetic elements on the substrate;

[0007] Among them, the linear distance between the orthographic projection of each light-reflecting structure in the first sub-main body part on the light-emitting layer and the corresponding light-emitting unit is greater than the linear distance between the orthographic projection of each light-reflecting structure in the second sub-main body part on the light-emitting layer and the corresponding light-emitting unit; and / or, the thickness of each light-reflecting structure in the first sub-main body part is less than the thickness of each light-reflecting structure in the second sub-main body part.

[0008] Among them, along the direction towards the center line of the first sub-main body part, the linear distance between the orthographic projection of a plurality of light-reflecting structures in the first sub-main body part on the light-emitting layer and the corresponding light-emitting unit gradually increases; and / or,

[0009] Along the direction towards the center line of the second sub-main body part, the linear distance between the orthographic projection of a plurality of light-reflecting structures in the second sub-main body part on the light-emitting layer and the corresponding light-emitting unit gradually decreases.

[0010] Among them, along the direction towards the center line of the first sub-main body part, the thickness of a plurality of light-reflecting structures in the first sub-main body part gradually decreases; and / or,

[0011] Along the direction towards the center line of the second sub-main body part, the thickness of a plurality of light-reflecting structures in the second sub-main body part gradually increases.

[0012] Among them, the main body part further includes third sub-main body parts located on both sides of the second sub-main body part;

[0013] The linear distance between the orthographic projection of each of the light reflection structures in the third sub-main body portion on the light-emitting layer and the corresponding light-emitting unit is greater than the linear distance between the orthographic projection of each light reflection structure in the second sub-main body portion on the light-emitting layer and the corresponding light-emitting unit and less than the linear distance between the orthographic projection of each light reflection structure in the first sub-main body portion on the light-emitting layer and the corresponding light-emitting unit; and / or,

[0014] The thickness of each of the light reflection structures in the third sub-main body portion is greater than the thickness of each of the light reflection structures in the first sub-main body portion and less than the thickness of each of the light reflection structures in the second sub-main body portion.

[0015] Wherein, the linear distances between the orthographic projections of the multiple light reflection structures in each of the first sub-main body portion, the second sub-main body portion, and the third sub-main body portion on the light-emitting layer and the corresponding light-emitting units are the same; and / or,

[0016] The thicknesses of the multiple light reflection structures in each sub-main body portion are the same.

[0017] Wherein, the main body portion is composed of the first sub-main body portion, the second sub-main body portion, and the third sub-main body portion.

[0018] Wherein, the first distance between the orthographic projection of the first type of light reflection structure on the light-emitting layer and the corresponding light-emitting unit is greater than the second distance between the orthographic projection of the second type of light reflection structure on the light-emitting layer and the corresponding light-emitting unit; and the thickness of the first type of light reflection structure is less than the thickness of the second type of light reflection structure.

[0019] Wherein, along the light-emitting direction of the light-emitting unit, the size of the vertical cross-section of each light reflection structure gradually decreases; and the linear distance between the orthographic projection of each light reflection structure on the light-emitting layer and the corresponding light-emitting unit is greater than or equal to 1 μm and less than or equal to 6 μm.

[0020] To solve the above technical problems, a technical solution adopted in this application is: to provide a display device. The display device includes the display panel involved above.

[0021] The beneficial effects of the present application, different from the prior art: By providing a light reflection layer on the light-emitting side of the light-emitting layer, the light reflection layer includes a plurality of light reflection structures; the orthographic projection of a light reflection structure on the light-emitting layer is arranged around the periphery of a light-emitting unit, and the first distance between the orthographic projection of the first type of light reflection structure among the plurality of light reflection structures on the light-emitting layer and the corresponding light-emitting unit is greater than the second distance between the orthographic projection of the second type of light reflection structure on the light-emitting layer and the corresponding light-emitting unit; and / or, the thickness of the first type of light reflection structure is less than the thickness of the second type of light reflection structure; wherein, the thickness of the light-emitting unit corresponding to the first type of light reflection structure is greater than the thickness of the light-emitting unit corresponding to the second type of light reflection structure; thus, the improvement ratio of the light extraction rate of the light-emitting unit corresponding to the position of the second type of light reflection structure can be made larger than the improvement ratio of the light extraction rate of the light-emitting unit corresponding to the position of the first type of light reflection structure, that is, in the area where the thickness of the evaporation coating layer of the light-emitting unit is relatively thin, the improvement ratio of the light extraction rate of the light-emitting unit increases, and in the area where the thickness of the evaporation coating layer of the light-emitting unit is relatively thick, the improvement ratio of the light-emitting unit is relatively low, thereby improving the phenomenon of the display panel presenting bright and dark alternating mura stripes, balancing the overall display effect of the display panel, and ensuring the uniformity of the display brightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 FIG. is a schematic diagram of the positions of the orthographic projections of the display panel and the ferromagnetic element on the substrate provided in an embodiment of the present application;

[0023] Figure 2 FIG. is a vertical cross-sectional view of the display panel at the first position provided in an embodiment of the present application;

[0024] Figure 3 FIG. is a vertical cross-sectional view of the display panel at the second position provided in an embodiment of the present application;

[0025] Figure 4 FIG. is a schematic diagram of the linear distance between the orthographic projections of a plurality of light reflection structures in the first sub-main body on the light-emitting layer and the corresponding light-emitting units;

[0026] Figure 5 FIG. is a schematic diagram of the linear distance between the orthographic projections of a plurality of light reflection structures in the second sub-main body on the light-emitting layer and the corresponding light-emitting units;

[0027] Figure 6 FIG. is a schematic diagram of the positions of the orthographic projections of the display panel and the ferromagnetic element on the substrate provided in another embodiment of the present application;

[0028] Figure 7 FIG. is a schematic structural diagram of a display device provided in an embodiment of the present application.

[0029] DESCRIPTION OF THE REFERENCE NUMERALS

[0030] Display panel 10; light-emitting layer 1; light-emitting unit 11; encapsulation layer 2; light reflection layer 3; main body layer 31; main body part A; first sub-main body part X1; second sub-main body part light X2; third sub-main body part X3; light reflection structure 32; ferromagnetic element 20. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a sub-main body part embodiment of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0032] The terms "first", "second", and "third" in the present application are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", and "third" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0033] Referring to "embodiment" herein means that a specific feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The phrase appears in various positions in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0034] The present application will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0035] Please refer to Figure 1 and Figure 2 , Figure 1Schematic diagram of the positions of the orthographic projections of the display panel and the ferromagnetic element on the substrate provided by an embodiment of the present application; Figure 2 Vertical cross-sectional view of the display panel at the first position provided by an embodiment of the present application; In this embodiment, a display panel 10 is provided. The display panel 10 can be an Organic Light-Emitting Diode (OLED) display panel, a Micro Light Emitting Diode (Micro LED or μLED) display panel, or a Liquid Crystal Display (LCD) display panel.

[0036] The display panel 10 can include a substrate (not shown in the figure), and the substrate can provide support for other structural film layers. Among them, the substrate can be a rigid substrate, specifically a glass substrate or other rigid substrates. In some other examples, the substrate can be a flexible substrate, and the material of the substrate can include at least one of Polyimide (abbreviated as PI), polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyarylate, and polyethersulfone.

[0037] As Figure 1 and Figure 2 shown, the display panel 10 can include a light-emitting layer 1, a packaging layer 2, and a light-reflecting layer 3 sequentially disposed on the substrate.

[0038] The light-emitting layer 1 includes a plurality of light-emitting units 11. The display panel 10 has an opposite light-emitting side and a backlight side. One side of the light-emitting side is used to display the picture. The backlight side is the opposite side of the light-emitting side along the thickness direction of the light-emitting layer 1. The light-emitting layer 1 is located on the side of the substrate facing the light-emitting side. The light-emitting unit 11 can include a red light-emitting unit (R), a green light-emitting unit (G), and a blue light-emitting unit (B). The light-emitting unit can also include a white light-emitting unit (W). Among them, due to the formation of the light-emitting unit 11, at the position corresponding to the ferromagnetic element 20 of the evaporation machine, the evaporation coating layer formed on the substrate is relatively thick, and the corresponding thickness of the formed light-emitting unit 11 is relatively thick. While at the gap between two adjacent ferromagnetic elements 20, the evaporation coating layer formed on the substrate is relatively thin, and the corresponding thickness of the formed light-emitting unit 11 is relatively thin; Therefore, the thickness of some of the plurality of light-emitting units 11 is relatively thick, and the thickness of the remaining light-emitting units 11 is relatively thin.

[0039] The encapsulation layer 2 is disposed on the surface of the light-emitting layer 1 facing away from the substrate and wraps the light-emitting layer 1. The encapsulation layer 2 can adopt the thin film encapsulation technology (TFE). The TFE encapsulation layer 2 can include a plurality of encapsulation sub-film layers, and the plurality of encapsulation sub-film layers can be a film layer structure in which an inorganic layer / an organic layer / an inorganic layer are overlapped. The inorganic layer is used to effectively block water and oxygen, and the organic layer is used to buffer the stress in the inorganic layer. The refractive index of the encapsulation sub-film layer closest to the light reflection layer 3 is less than or equal to the refractive index of the light reflection layer 3, so as to avoid total reflection when light travels from this encapsulation sub-film layer to the light reflection layer 3.

[0040] The light reflection layer 3 includes a plurality of light reflection structures 32 and is disposed on the side of the light-emitting layer 1 facing the light-emitting side. In a specific embodiment, the plurality of light reflection structures 32 are disposed on the surface of the encapsulation layer 2 facing away from the substrate, and the embodiments of the present application will be described by taking this as an example. Those skilled in the art can understand that in other specific embodiments, the plurality of light reflection structures 32 can also be disposed on the surface of a certain encapsulation sub-film layer of the encapsulation layer 2 facing away from the substrate, such as the surface of the TFE-CVD1 of the encapsulation layer 2 facing away from the substrate. At this time, among the two encapsulation sub-film layers closest to the plurality of light reflection structures 32, the refractive index of the encapsulation sub-film layer located on the side of the plurality of light reflection structures 32 facing the substrate is less than or equal to the refractive index of the light reflection layer 3, and the refractive index of the encapsulation sub-film layer located on the side of the plurality of light reflection structures 32 facing away from the substrate is greater than the refractive index of the light reflection layer 3, so as to avoid total reflection.

[0041] Alternatively, the display panel 10 further includes a pixel defining layer (PDL) disposed on the substrate and a support column (SPC) disposed on the surface of the pixel defining layer facing away from the substrate; the plurality of light reflection structures 32 can also be disposed on the surface of the pixel defining layer facing away from the substrate, or on the surface of the support column facing away from the pixel defining layer, or the support column includes a plurality of light reflection structures. The present application does not limit the specific setting position of the plurality of light reflection structures 32, as long as it is located on the side of the light-emitting layer 1 facing the light-emitting side.

[0042] As Figure 2 shown, the light reflection layer 3 specifically includes a main body layer 31 and a plurality of light reflection structures 32.

[0043] Among them, as Figure 1 shown, the main body layer 31 includes a plurality of main body parts A connected in sequence along the preset direction Y. During the evaporation process, a ferromagnetic element 20 of the evaporation machine is correspondingly disposed in the area where each main body part A is located, and the plurality of ferromagnetic elements 20 are spaced apart along the preset direction Y. The ferromagnetic element 20 can be a ferromagnetic plate.

[0044] Combined with Figure 2 and Figure 4, a plurality of light reflection structures 32 are disposed in the main body layer 31, and the orthographic projection of one light reflection structure 32 on the light-emitting layer 1 is disposed around the periphery of one light-emitting unit 11; and the refractive index of the light reflection structure 32 is less than the refractive index of the main body layer 31. Thus, when light is incident from the main body layer 31 to the light reflection structure 32, it can be reflected back to the main body layer 31 and cannot be emitted into the light reflection structure 32, thereby increasing the proportion of the emitted light of the display panel 10, improving the brightness of the display panel 10, and reducing the power consumption of the display panel 10.

[0045] Specifically, the light reflection structure 32 has a light reflection surface on the side facing the light-emitting unit 11. The light reflection surface is the interface of the light reflection structure 32 adjacent to the main body layer 31, and the light reflection surface extends along the thickness direction Y of the display panel 10. Among them, the light reflection surface is inclined, and the end of the light reflection surface away from the light-emitting layer 1 is inclined toward the center of the light reflection structure 32. Compared with the vertical setting, when the thickness of the light reflection structure 32 is the same, the inclined setting of the light reflection surface can increase the area of the light reflection surface, so that the light reflection surface can reflect more light. In addition, by reasonably setting the inclination angle of the light reflection surface, the light can be emitted in a direction perpendicular to the display panel 10, thereby increasing the front view angle of the display panel 10.

[0046] Specifically, the cross-section of the light reflection structure 32 along the thickness direction Y can be trapezoidal.

[0047] Specifically, the plurality of light reflection structures 32 include a first type of light reflection structure 32 and a second type of light reflection structure 32. The thickness of the light-emitting unit 11 corresponding to the first type of light reflection structure 32 is greater than the thickness of the light-emitting unit 11 corresponding to the second type of light reflection structure 32. It should be noted that the light-emitting unit 11 corresponding to the light reflection structure 32 involved in the present application refers to the light-emitting unit 11 surrounded by the light reflection structure 32. It can be understood that the orthographic projection of the first type of light reflection structure 32 on the substrate overlaps with the orthographic projection of the ferromagnetic element 20 on the substrate during the evaporation process of the light-emitting layer; the orthographic projection of the second type of light reflection structure 32 on the substrate is misaligned with the orthographic projection of the ferromagnetic element 20 on the substrate during the evaporation process of the light-emitting layer, that is, the orthographic projection of the second type of light reflection structure 32 on the substrate is located in the gap between the orthographic projections of two adjacent ferromagnetic elements 20 on the substrate. Those skilled in the art can understand that the main body layer 31 includes a plurality of first type light reflection structures 32 and a plurality of second type light reflection structures 32.

[0048] Comparison Figure 2 and Figure 3 , Figure 3A vertical cross-sectional view at the second position of the display panel 10 provided in an embodiment of the present application; among the multiple light reflection structures 32 in each main body portion A, the first distance d1 between the orthographic projection of the first type of light reflection structure 32 on the light-emitting layer 1 and the light-emitting unit 11 corresponding to the first type of light reflection structure 32 is greater than the second distance d2 between the orthographic projection of the second type of light reflection structure 32 on the light-emitting layer 1 and the light-emitting unit 11 corresponding to the second type of light reflection structure 32. Alternatively, the thickness h1 of the first type of light reflection structure 32 is less than the thickness h2 of the second type of light reflection structure 32. In other words, among the multiple light reflection structures 32 in each main body portion A, the first distance d1 between the orthographic projection of the first type of light reflection structure 32 on the substrate and the orthographic projection of the light-emitting unit 11 corresponding to the first type of light reflection structure 32 on the substrate is greater than the second distance d2 between the orthographic projection of the second type of light reflection structure 32 on the substrate and the orthographic projection of the light-emitting unit 11 corresponding to the second type of light reflection structure 32 on the substrate.

[0049] Table 1 shows the data of the improvement ratio of the light extraction rate of the light-emitting unit corresponding to different linear distances between the orthographic projection of the light reflection structure on the light-emitting layer and the corresponding light-emitting unit.

[0050]

[0051]

[0052] Referring to Table 1, through experimental verification, the above scheme can make the improvement ratio of the light extraction rate of the light-emitting unit 11 corresponding to the position where the second type of light reflection structure 32 is located larger than the improvement ratio of the light extraction rate of the light-emitting unit 11 corresponding to the position where the first type of light reflection structure 32 is located. That is, in the region where the evaporation coating layer thickness of the light-emitting unit 11 is relatively thin, the improvement ratio of the light extraction rate of the light-emitting unit 11 is larger than that in the region where the evaporation coating layer thickness of the light-emitting unit 11 is relatively thick, which can effectively improve the phenomenon of alternating bright and dark mura stripes presented by the display panel 10, balance the overall display effect of the display panel 10, and ensure the uniformity of the display brightness.

[0053] Specifically, the linear distance between the orthographic projection of each light reflection structure 32 on the light-emitting layer 1 and the corresponding light-emitting unit 11 is greater than or equal to 1 μm and less than or equal to 6 μm. Preferably, the linear distance between the orthographic projection of the light reflection structure 32 on the light-emitting layer 1 and the corresponding light-emitting unit 11 is 2.7 μm, 3 μm, 3.3 μm, 3.5 μm, 4 μm, etc.

[0054] Of course, in other embodiments, among the multiple light reflection structures 32 in each main body portion A, the first distance d1 between the orthographic projection of the first type of light reflection structure 32 on the light-emitting layer 1 and the corresponding light-emitting unit 11 may be greater than the second distance d2 between the orthographic projection of the second type of light reflection structure 32 on the light-emitting layer 1 and the corresponding light-emitting unit 11; and the thickness h1 of the first type of light reflection structure 32 is less than the thickness h2 of the second type of light reflection structure 32, so as to further improve the phenomenon of light and dark alternating stripes of the display panel 10.

[0055] In a specific embodiment, as Figure 1 shown, the main body portion A includes a first sub-main body portion X1 and a second sub-main body portion X2 arranged along the preset direction Y. Along the preset direction Y, the orthographic projection of the center line S1 of the first sub-main body portion X1 on the substrate coincides with the orthographic projection of the center line S0 of the ferromagnetic element 20 on the substrate, and the orthographic projection of the center line S2 of the second sub-main body portion X2 on the substrate coincides with the orthographic projection of the center lines S3 of two adjacent ferromagnetic elements 20 on the substrate. It can be understood that the linear distances between these two ferromagnetic elements 20 and the center line S3 are the same.

[0056] Among them, the linear distance between the orthographic projection of each light reflection structure 32 in the first sub-main body portion X1 on the light-emitting layer 1 and the corresponding light-emitting unit 11 is greater than the linear distance between the orthographic projection of each light reflection structure 32 in the second sub-main body portion X2 on the light-emitting layer 1 and the corresponding light-emitting unit 11. Alternatively, the thickness of each light reflection structure 32 in the first sub-main body portion X1 is less than the thickness of each light reflection structure 32 in the second sub-main body portion X2. In this way, the light extraction rate of the light-emitting units 11 in the second sub-main body portion X2 can be made greater than that of the light-emitting units 11 in the first sub-main body portion X1, thereby improving the phenomenon of light and dark alternating mura stripes presented by the display panel 10 and balancing the overall display effect of the display panel 10.

[0057] Of course, it is also possible to make the linear distance between the orthographic projection of each light reflection structure 32 in the first sub-main body portion X1 on the light-emitting layer 1 and the corresponding light-emitting unit 11 greater than the linear distance between the orthographic projection of each light reflection structure 32 in the second sub-main body portion X2 on the light-emitting layer 1 and the corresponding light-emitting unit 11; and the thickness of each light reflection structure 32 in the first sub-main body portion X1 is less than the thickness of each light reflection structure 32 in the second sub-main body portion X2.

[0058] The applicant has found through research that during the evaporation coating process, the closer to the center line S0 of the ferromagnetic element 20, the stronger the magnetic adsorption force of the ferromagnetic element 20 on the mask plate, and the thicker the thickness of the evaporation coating layer corresponding to this position; as a result, among the multiple light-emitting units 11 distributed along the preset direction Y in the first sub-main body X1, along the direction towards the center line S1 of the first sub-main body X1, the film thickness of the light-emitting units 11 gradually increases, and among the multiple light-emitting units 11 distributed along the preset direction Y in the second sub-main body X2, along the direction towards the center line S2 of the second sub-main body X2, the film thickness of the light-emitting units 11 gradually decreases.

[0059] Therefore, as Figure 4 shown, Figure 4 It is a schematic diagram of the straight-line distance between the orthographic projection of the multiple light reflection structures 32 in the first sub-main body X1 on the light-emitting layer 1 and the corresponding light-emitting units 11; along the direction towards the center line S1 of the first sub-main body X1, for the multiple light reflection structures 32 in the first sub-main body X1, the straight-line distance between the orthographic projection of the multiple light reflection structures located on one side or both sides of the center line S1 of the first sub-main body X1 on the light-emitting layer 1 and the corresponding light-emitting units 11 gradually increases; that is, d5 < d4 < d3. Specifically, along the direction towards the center line S1 of the first sub-main body X1, for the multiple light reflection structures 32 in the first sub-main body X1, the thickness of the multiple light reflection structures located on one side or both sides of the center line S1 of the first sub-main body X1 can also gradually decrease. In this way, the phenomenon of light and dark alternation caused by different thicknesses of each light-emitting unit 11 in the first sub-main body X1 can be further improved, and the overall brightness uniformity of the display panel 10 can be improved.

[0060] Specifically, as Figure 5 shown, Figure 5 It is a schematic diagram of the straight-line distance between the orthographic projection of the multiple light reflection structures 32 in the second sub-main body X2 on the light-emitting layer 1 and the corresponding light-emitting units 11. Along the direction towards the center line S2 of the second sub-main body X2, for the multiple light reflection structures 32 in the second sub-main body X2, the straight-line distance between the orthographic projection of the light reflection structures 32 located on one side or both sides of the center line S2 of the second sub-main body X2 on the light-emitting layer 1 and the corresponding light-emitting units 11 gradually decreases; that is, d6 > d7 > d8. Among them, d6 is not greater than d5. Specifically, along the direction towards the center line S2 of the second sub-main body X2, for the multiple light reflection structures 32 in the second sub-main body X2, the thickness of the light reflection structures 32 located on one side or both sides of the center line S2 of the second sub-main body X2 gradually increases. In this way, the phenomenon of light and dark alternation caused by different thicknesses of each light-emitting unit 11 in the second sub-main body X2 can be further improved, and the overall brightness uniformity of the display panel 10 can be improved.

[0061] In one embodiment, as Figure 1As shown, each main body part A is composed of a first sub-main body part X1 and a second sub-main body part X2. Those skilled in the art can understand that in this embodiment, the first sub-main body part X1 and the second sub-main body part X2 are periodically distributed along the preset direction Y to improve the light and dark alternating mura stripes of the entire display panel 10 and improve the overall display uniformity.

[0062] In another embodiment, referring to Figure 6 , Figure 6 is a schematic position diagram of the orthographic projection of the display panel and the ferromagnetic element provided in another embodiment of the present application on the substrate; to further improve the phenomenon of light and dark alternating mura stripes in each main body part A; the main body part A further includes third sub-main body parts X3 located on both sides of the second sub-main body part X2.

[0063] For each light reflection structure 32 in the third sub-main body part X3, the straight-line distance between its orthographic projection on the light-emitting layer 1 and the corresponding light-emitting unit 11 is greater than the straight-line distance between the orthographic projection of each light reflection structure 32 in the second sub-main body part X2 on the light-emitting layer 1 and the corresponding light-emitting unit 11 and less than the straight-line distance between the orthographic projection of each light reflection structure 32 in the first sub-main body part X1 on the light-emitting layer 1 and the corresponding light-emitting unit 11.

[0064] Alternatively, the thickness of each light reflection structure 32 in the third sub-main body part X3 is greater than the thickness of each light reflection structure 32 in the first sub-main body part X1 and less than the thickness of each light reflection structure 32 in the second sub-main body part X2. Of course, it is also possible to make both the straight-line distance between the orthographic projection of each light reflection structure 32 in the third sub-main body part X3 on the light-emitting layer 1 and the corresponding light-emitting unit 11 and the thickness meet the above requirements.

[0065] By further refining the main body part A as described above, so that the main body part A includes a larger number of sub-main body parts, and for the multiple light reflection structures 32 in the main body part A, along the direction from the first sub-main body part X1 to the second sub-main body part X2, the straight-line distance between the orthographic projection of the light reflection structure 32 on the light-emitting layer 1 and the corresponding light-emitting unit 11 gradually decreases, and / or the thickness of the light reflection structure 32 gradually increases, so that the light extraction rate of the multiple light-emitting units 11 distributed along the preset direction Y gradually increases, thereby increasing the brightness of the light-emitting units 11 with gradually decreasing film thickness, to improve the light and dark alternating mura stripes of the main body part A and improve the brightness uniformity of the main body part A.

[0066] Specifically, each main body part A is composed of a first sub-main body part X1, a second sub-main body part X2, and two third sub-main body parts X3. Those skilled in the art combine Figure 6It can be understood that in this embodiment, the first sub-body portion X1, the third sub-body portion X3, the second sub-body portion X2, and the third sub-body portion X3 are periodically distributed along the preset direction Y to improve the light and dark mura stripes of the entire display panel 10 and improve the overall display uniformity.

[0067] Of course, a fourth sub-body part, a fifth sub-body part, ... an Nth sub-body part may also be provided on the side of the third sub-body part X3 away from the second sub-body part X2. N is a natural number greater than or equal to four. The straight-line distance between the orthographic projection of the light-reflecting structure 32 in the fourth sub-body part, the fifth sub-body part, ... the Nth sub-body part on the light-emitting layer 1 and the corresponding light-emitting unit 11 gradually increases, and is less than the straight-line distance between the orthographic projection of the light-reflecting structure 32 in the first sub-body part X1 on the light-emitting layer 1 and the corresponding light-emitting unit 11. The thickness of the light-reflecting structure 32 in the fourth sub-body part, the fifth sub-body part, ... the Nth sub-body part gradually decreases and is greater than the thickness of the light-reflecting structure 32 in the first sub-body part X1. It can be understood that the fourth sub-body part, the fifth sub-body part, ... the Nth sub-body part are similar to the third sub-body part X3, and there are two of them.

[0068] The present application introduces a microlens structure with a periodically differentiated design on the OLED display panel 10, and performs periodic differential design on the opening size of the microlens or the thickness of the light reflection structure 32, so that the brightness increase ratio in the dark area is increased and the brightness increase ratio in the bright area is relatively low, thereby balancing the overall display effect of the display panel 10 and achieving the effect of improving the alternating light and dark mura stripes caused by the periodic distribution of the evaporated magnet plate.

[0069] In the present application, a light reflection layer 3 is provided on the light-emitting side of the light-emitting layer 1, and the light reflection layer 3 includes a main body layer 31 and a plurality of light reflection structures 32 provided in the main body layer 31; the main body layer 31 includes a plurality of main body parts A connected in sequence; the orthographic projection of the light reflection structure 32 on the light-emitting layer 1 is arranged around the periphery of a light-emitting unit 11, and the refractive index of the light reflection structure 32 is less than that of the main body layer 31, so that when light travels from the main body layer 31 to the light reflection structure 32, total internal reflection is more likely to occur, reducing the loss of light entering the light reflection structure 32, enabling the light to directly travel from the main body layer 31 to the user, improving the light extraction efficiency, increasing the brightness of the display panel 10, and reducing the power consumption of the display panel 10. Further, among the plurality of light reflection structures 32 in each main body part A, the first distance d1 between the orthographic projection of the first type of light reflection structure 32 on the light-emitting layer 1 and the corresponding light-emitting unit 11 is greater than the second distance d2 between the orthographic projection of the second type of light reflection structure 32 on the light-emitting layer 1 and the corresponding light-emitting unit 11; and / or, the thickness of the first type of light reflection structure 32 is less than the thickness of the second type of light reflection structure 32; wherein, the thickness of the light-emitting unit 11 corresponding to the first type of light reflection structure 32 is greater than the thickness of the light-emitting unit 11 corresponding to the second type of light reflection structure 32; thus, the improvement ratio of the light extraction efficiency of the light-emitting unit 11 corresponding to the position where the second type of light reflection structure 32 is located can be made larger than the improvement ratio of the light extraction efficiency of the light-emitting unit 11 corresponding to the position where the first type of light reflection structure 32 is located, that is, in the region where the thickness of the evaporation coating layer of the light-emitting unit 11 is relatively thin, the improvement ratio of the light extraction efficiency of the light-emitting unit 11 increases, and in the region where the thickness of the evaporation coating layer of the light-emitting unit 11 is relatively thick, the improvement ratio of the light-emitting unit 11 is relatively low, thereby improving the phenomenon of the display panel 10 presenting alternating bright and dark mura stripes, balancing the overall display effect of the display panel 10, and ensuring the uniformity of the display brightness.

[0070] See Figure 7 , Figure 7 is a schematic structural diagram of a display device provided by an embodiment of the present application; in this embodiment, a display device is further provided, and the display device can be a desktop computer, a laptop computer, a personal digital assistant (Personal Digital Assistant, PDA), a mobile phone, a television, etc. The display device includes a display panel 10 for displaying a picture during operation. Among them, the display panel 10 is the display panel 10 involved in any of the above embodiments, and the specific structure and function of the display panel 10 can be referred to the relevant description of the display panel 10 provided in the above embodiments, which will not be elaborated here.

[0071] The above are only the implementation manners of this application, and do not thus limit the patent scope of this application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of this application, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of this application.

Claims

1. A display panel, characterized in that, Comprising: A light-emitting layer including a plurality of light-emitting units; A light-reflecting layer disposed on the light-emitting side of the light-emitting layer; and the light-reflecting layer includes a plurality of light-reflecting structures, and a positive projection of one of the light-reflecting structures on the light-emitting layer is disposed around the periphery of one of the light-emitting units; Wherein, a first distance between a positive projection of a first type of light-reflecting structure among the plurality of light-reflecting structures on the light-emitting layer and the corresponding light-emitting unit is greater than a second distance between a positive projection of a second type of light-reflecting structure on the light-emitting layer and the corresponding light-emitting unit; and / or, the thickness of the first type of light-reflecting structure is less than the thickness of the second type of light-reflecting structure; wherein, the thickness of the light-emitting unit corresponding to the first type of light-reflecting structure is greater than the thickness of the light-emitting unit corresponding to the second type of light-reflecting structure.

2. The display panel according to claim 1, wherein It further includes a substrate, and the light-emitting layer is disposed on the substrate; the light-reflecting layer further includes a main body layer, and the main body layer includes a plurality of main body parts connected in sequence; the light-reflecting structures are disposed in the main body layer, and the refractive index of the light-reflecting structures is less than the refractive index of the main body layer; during the evaporation process, a plurality of ferromagnetic elements of an evaporation machine are spaced apart along a preset direction, and one of the main body parts corresponds to one of the ferromagnetic elements; The main body part includes a first sub-main body part and a second sub-main body part disposed along the preset direction; along the preset direction, a positive projection of the center line of the first sub-main body part on the substrate coincides with a positive projection of the center line of the ferromagnetic element on the substrate, and a positive projection of the center line of the second sub-main body part on the substrate coincides with a positive projection of the center lines of two adjacent ferromagnetic elements on the substrate; Wherein, a linear distance between a positive projection of each of the light-reflecting structures in the first sub-main body part on the light-emitting layer and the corresponding light-emitting unit is greater than a linear distance between a positive projection of each of the light-reflecting structures in the second sub-main body part on the light-emitting layer and the corresponding light-emitting unit; and / or, the thickness of each of the light-reflecting structures in the first sub-main body part is less than the thickness of each of the light-reflecting structures in the second sub-main body part.

3. The display panel according to claim 2, wherein Along the direction towards the center line of the first sub-main body part, the linear distance between the positive projections of the plurality of light-reflecting structures in the first sub-main body part on the light-emitting layer and the corresponding light-emitting units gradually increases; and / or, Along the direction towards the center line of the second sub-main body part, the linear distance between the positive projections of the plurality of light-reflecting structures in the second sub-main body part on the light-emitting layer and the corresponding light-emitting units gradually decreases.

4. The display panel according to claim 2 or 3, wherein Along the direction towards the center line of the first sub-main body part, the thicknesses of the plurality of light-reflecting structures in the first sub-main body part gradually decrease; and / or, Along the direction towards the center line of the second sub-main body part, the thicknesses of the plurality of light-reflecting structures in the second sub-main body part gradually increase.

5. The display panel according to claim 2, wherein the main body portion further includes third sub-body portions located on both sides of the second sub-body portion; the linear distance between the orthographic projection of each light reflection structure in the third sub-body portion on the light-emitting layer and the corresponding light-emitting unit is greater than the linear distance between the orthographic projection of each light reflection structure in the second sub-body portion on the light-emitting layer and the corresponding light-emitting unit and less than the linear distance between the orthographic projection of each light reflection structure in the first sub-body portion on the light-emitting layer and the corresponding light-emitting unit; and / or, the thickness of each light reflection structure in the third sub-body portion is greater than the thickness of each light reflection structure in the first sub-body portion and less than the thickness of each light reflection structure in the second sub-body portion.

6. The display panel according to claim 5, wherein the linear distances between the orthographic projections of the multiple light reflection structures in each of the first sub-body portion, the second sub-body portion, and the third sub-body portion on the light-emitting layer and the corresponding light-emitting units are the same; and / or, the thicknesses of the multiple light reflection structures in each sub-body portion are the same.

7. The display panel according to claim 5 or 6, wherein the main body portion is composed of the first sub-body portion, the second sub-body portion, and the third sub-body portion.

8. The display panel according to claim 1, wherein along the light-emitting direction of the light-emitting unit, the size of the vertical cross-section of each light reflection structure gradually decreases; and the linear distance between the orthographic projection of each light reflection structure on the light-emitting layer and the corresponding light-emitting unit is greater than or equal to 1 μm and less than or equal to 6 μm.

9. A display device, characterized in that, including the display panel according to any one of claims 1-8.

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