Display panel and display apparatus

Abstract

The present application provides a display panel and a display apparatus. The display panel comprises an array substrate, a plurality of light-emitting units and a plurality of dimming parts, the plurality of light-emitting units and the plurality of dimming parts all being arranged on a first side of the array substrate; the dimming parts each comprise at least one a composite light guide part, which surrounds the periphery of the side wall of a light-emitting unit; each composite light guide part comprises a first light guide part and a second light guide part arranged on the side of the first light guide part facing away from the side wall of the light-emitting unit, the refractive index of the first light guide part being less than that of the second light guide part.

Description

Display panel and display device

[0001] This application claims priority to Chinese patent application No. 202311618493.0 filed on November 28, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0003] Mini LED (Mini Light-Emitting Diode) and Micro LED (Micro Light-Emitting Diode), collectively referred to as M-LED, have experienced accelerated development in the past two years, gradually finding application in small and medium-sized, high-value-added display applications. Compared to OLED (Organic Light-Emitting Diode) displays, M-LED displays offer advantages in cost, contrast, brightness, and form factor.

[0004] However, the M-LED units in the related art M-LED display have higher luminous intensity at wide viewing angles (e.g., viewing angles greater than or equal to 0° and less than 60°) and wide viewing angles (greater than 120° and less than or equal to 180°), but lower luminous intensity at normal viewing angles (e.g., viewing angles greater than or equal to 60° and less than or equal to 120°). When users demand higher brightness at normal viewing angles, the only way to increase the brightness at normal viewing angles is to increase the drive current, which inevitably increases the power consumption of the M-LED display. Therefore, there is an urgent need to provide an M-LED display with higher brightness at normal viewing angles and lower power consumption. Summary of the Invention

[0005] The present application provides a display panel and a display device, which can effectively solve the problem of high power consumption caused by increasing the display brightness at a normal viewing angle in the M-LED display screen in the related art.

[0006] In a first aspect, the present application provides a display panel, comprising: an array substrate; a plurality of light-emitting units arranged on a first side of the array substrate; a plurality of dimming parts arranged on the first side of the array substrate and corresponding one-to-one to the plurality of light-emitting units; wherein the dimming part comprises at least one composite light-guiding part arranged in sequence in a direction away from the side wall of the light-emitting unit, the composite light-guiding part at least surrounding the periphery of the side wall of the light-emitting unit, each of the composite light-guiding parts comprising a first light-guiding part and a second light-guiding part arranged on a side of the first light-guiding part away from the side wall of the light-emitting unit, and the refractive index of the first light-guiding part is smaller than the refractive index of the second light-guiding part.

[0007] In a second aspect, the present application further proposes a display device, which includes a housing and the above-mentioned display panel. The housing has an accommodating space, and the display panel is arranged in the accommodating space. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] FIG1 is a planar schematic diagram of a light-emitting unit and a dimming unit on an array substrate in a display panel provided in some embodiments of the present application.

[0009] FIG2 is a first schematic cross-sectional view of a portion of a display panel provided in the present application.

[0010] FIG3 a is a schematic diagram showing the intensity of light emitted from a display panel at different viewing angles in the related art provided in this application.

[0011] FIG3 b is a schematic diagram of the intensity of light emitted from the display panel at various viewing angles provided in FIG2 of the present application.

[0012] FIG4 is a second schematic cross-sectional view of a portion of the display panel provided in the present application.

[0013] FIG5 is a third partial cross-sectional schematic diagram of the display panel provided in this application.

[0014] FIG6 is a fourth partial cross-sectional schematic diagram of the display panel provided in this application. Modes for Carrying Out the Invention

[0015] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application and are not intended to limit the present application.

[0016] In the description of this application, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, and "at least one" means one, two, or more, unless otherwise specifically defined.

[0018] FIG1 is a plan view schematically showing a light-emitting unit and a dimming unit on an array substrate in a display panel provided in an embodiment of the present application; FIG2 is a first cross-sectional schematic view of a portion of the display panel provided in the present application.

[0019] 1 and 2 , in a first aspect, an embodiment of the present application provides a display panel, which includes an array substrate 10, a plurality of light-emitting units 20 and a plurality of dimming sections 30, wherein the plurality of light-emitting units 20 are arranged on a first side of the array substrate 10; the plurality of dimming sections 30 are arranged on the first side of the array substrate 10 and correspond to the plurality of light-emitting units 20; wherein the dimming section 30 includes at least one composite light-guiding section 31 sequentially arranged in a direction away from the side wall 21 of the light-emitting unit 20, the composite light-guiding section 31 at least surrounding the periphery of the side wall 21 of the light-emitting unit 20, each composite light-guiding section 31 includes a first light-guiding section 311 and a second light-guiding section 312 arranged on a side of the first light-guiding section 311 away from the side wall 21 of the light-emitting unit 20, and the refractive index of the first light-guiding section 311 is less than the refractive index of the second light-guiding section 312.

[0020] In the display panel provided by the present application, since the display panel includes a dimming portion 30 provided in a one-to-one correspondence with the light-emitting unit 20, each composite light-guiding portion 31 in the dimming portion 30 sequentially surrounds the periphery of the side wall 21 of the light-emitting unit 20, and each composite light-guiding portion 31 includes a first light-guiding portion 311 having a lower refractive index and a second light-guiding portion 312 having a higher refractive index provided on a side of the first light-guiding portion 311 away from the side wall 21 of the light-emitting unit 20, therefore, the light emitted from the light-emitting unit 20 has a large viewing angle (such as a viewing angle of [0°, 60°) and a viewing angle of (120°, 180°) At least a portion of the outgoing light (with a viewing angle of [60°-120°]) can be irradiated onto the composite light guide portion 31 and undergoes angular deflection at the interface between the first light guide portion 311 and the second light guide portion 312, and is converted into outgoing light at a positive viewing angle (such as outgoing light with a viewing angle of [60°-120°]), thereby increasing the amount of outgoing light at a positive viewing angle, thereby eliminating the need to increase the driving current of the light-emitting unit 20, and achieving a significant improvement in the display brightness of the display panel at a positive viewing angle under conditions of lower power consumption, thereby solving the problem of high power consumption caused by the M-LED display screen in the related art to improve the display brightness at a positive viewing angle.

[0021] FIG3a is a schematic diagram of the intensity of the emitted light at various viewing angles of the display panel in the related art provided by this application; FIG3b is a schematic diagram of the intensity of the emitted light at various viewing angles of the display panel provided by FIG2 of this application. Referring to FIG3a and FIG3b, in the display panel in the related art, the maximum intensity of the emitted light at viewing angles of [0°, 60°) and (120°, 180°) is greater than 150 cd, and the maximum intensity of the emitted light at a viewing angle of [60°-120°] is less than 150 cd; while under the same power consumption level (i.e., the same driving current of the light-emitting unit 20), in the display panel provided by this application, the maximum intensity of the emitted light at viewing angles of [0°, 60°) and (120°, 180°) is less than 100 cd, and the maximum intensity of the emitted light at a viewing angle of [60°-120°] is greater than 200 cd.

[0022] It should be noted that the present application does not limit the specific viewing angles corresponding to the wide-viewing angle output light and the positive-viewing angle output light. For example, in some embodiments of the present application, the wide-viewing angle output light may be output light with a viewing angle of [0°, 60°) and a viewing angle of (120°, 180°), and the positive-viewing angle output light may be output light with a viewing angle of [60°-120°]. In other embodiments of the present application, the wide-viewing angle output light may be output light with a viewing angle of [0°, 45°) and a viewing angle of (135°, 180°), and the positive-viewing angle output light may be output light with a viewing angle of [45°-135°].

[0023] In some embodiments of the present application, the type of the light-emitting unit 20 is a Micro LED light-emitting unit 20 or a Mini LED light-emitting unit 20 .

[0024] In some embodiments of the present application, the light-emitting unit 20 is an LED chip, which includes a semiconductor wafer.

[0025] In this embodiment, the light emitting unit 20 is a semiconductor chip.

[0026] In this embodiment, the refractive index of the light emitting unit 20 is greater than the refractive index of the first light guiding portion 311 .

[0027] In some embodiments of the present application, the light modulating unit 30 includes one or more composite light guide units 31. The first light guide unit 311 may be made of an inorganic material, such as silicon oxide, or an organic material, such as a low-refractive-index acrylic resin. The second light guide unit 312 may be made of an inorganic material, such as titanium dioxide or silicon nitride, or an organic material, such as a high-refractive-index acrylic resin, or a composite material formed by doping a low-refractive-index acrylic resin with high-refractive-index particles.

[0028] In some embodiments of the present application, the dimming portion 30 includes only one composite light guide portion 31, wherein the second light guide portion 312 may be a metal with a light-reflecting function. When the second light guide portion 312 is a metal with a light-reflecting function, the first light guide portion 311 may be omitted or retained.

[0029] It should be noted that, although the second light-guiding portion 312 can be set to a metal with a reflective function, and the reflective function of the reflective metal can be used to reflect the wide-angle output light of the light-emitting unit 20 to achieve the purpose of increasing the positive-angle output light of the light-emitting unit 20, the embodiment of the present application can use the difference in refractive index between the first light-guiding portion 311 and the second light-guiding portion 312 to achieve the purpose of increasing the positive-angle output light of the light-emitting unit 20. The reason is that the light-emitting unit 20 in the M-LED display panel is small in size and the spacing distance between two adjacent light-emitting units 20 is small, and the metal etching process is difficult to apply to this application environment. Using non-metallic materials to form the first light guide part 311 and the second light guide part 312 with different refractive indices can reduce the process difficulty and ensure the light-guiding effect of the composite light guide part 31. In addition, the composite light guide part 31 composed of the first light guide part 311 with a lower refractive index and the second light guide part 312 with a higher refractive index can adjust the deflection effect of the wide-angle output light of the light-emitting unit 20 by adjusting the refractive index difference between the first light guide part 311 and the second light guide part 312. The control method is simpler and more efficient, and can be designed for light-emitting units 20 with different light types, with higher design freedom.

[0030] In some embodiments of the present application, referring to FIG. 2 , the distance between one end of the side wall 21 of the light-emitting unit 20 away from the array substrate 10 and the array substrate 10 is a first distance H1, the distance between one end of the first light-guiding portion 311 away from the array substrate 10 and the array substrate 10 is a second distance H2, and the distance between one end of the second light-guiding portion 312 away from the array substrate 10 and the array substrate 10 is a third distance H3, wherein both the second distance H2 and the third distance H3 are greater than the first distance H1.

[0031] It should be noted that, although the first distance H1 , the second distance H2 , and the third distance H3 are not marked in FIG. 4 to FIG. 6 , the relationship between the three distances in FIG. 4 to FIG. 6 is the same as that in FIG. 2 .

[0032] In the display panel provided by the present application, since the distance between the end of the first light guiding portion 311 away from the array substrate 10 and the array substrate 10 is greater than the distance between the end of the side wall 21 of the light emitting unit 20 away from the array substrate 10 and the array substrate 10, and the distance between the end of the second light guiding portion 312 away from the array substrate 10 and the array substrate 10 is greater than the distance between the end of the side wall 21 of the light emitting unit 20 away from the array substrate 10 and the array substrate 10, the light guiding range of the composite light guiding portion 31 can be improved, and the composite light guiding portion 31 can convert more wide-angle output light of the output light of the light emitting unit 20 into positive-angle output light, thereby further improving the display brightness of the display panel at a positive viewing angle.

[0033] In some embodiments of the present application, the display panel further includes an encapsulation adhesive layer 40, which is disposed on the first side of the array substrate 10 and covers a plurality of light-emitting units 20 and a plurality of dimming parts 30, wherein the encapsulation adhesive includes a substrate 41, and a refractive index of the substrate 41 is greater than a refractive index of the first light guide part 311.

[0034] In the display panel provided in the present application, since the refractive index of the base material 41 of the encapsulation layer 40 is greater than the refractive index of the first light guide portion 311 , the Fresnel loss of the light emitted from the light emitting unit 20 or the light efficiency loss caused by total reflection can be reduced.

[0035] In this embodiment, the reduced light efficiency loss includes the light efficiency loss caused by the light emitted from the light emitting unit 20 at the interface between the substrate 41 and the first light guide portion 311 due to the difference in refractive index between the substrate 41 of the encapsulation layer 40 and the first light guide portion 311 .

[0036] In this embodiment, the reduced light efficiency loss also includes the light efficiency loss caused by the light emitted from the light emitting unit 20 at the interface between the substrate 41 and the light emitting unit 20 due to the difference in refractive index between the substrate 41 of the encapsulation layer 40 and the light emitting unit 20 .

[0037] Since the refractive index of the light-emitting unit 20 is greater than the refractive index of the first light-guiding portion 311, when the refractive index of the substrate 41 is greater than the refractive index of the first light-guiding portion 311, the refractive index difference between the encapsulation layer 40 and the light-emitting unit 20 can be reduced, thereby reducing the light efficiency loss caused by the outgoing light of the light-emitting unit 20 at the interface between the substrate 41 and the light-emitting unit 20 due to the refractive index difference between the substrate 41 of the encapsulation layer 40 and the light-emitting unit 20.

[0038] In some embodiments of the present application, the material of the substrate 41 may include a high-refractive acrylic resin.

[0039] In this embodiment, the material of the substrate 41 is the same as that of the second light-guiding portion 312, and has the same refractive index. The refractive index of the substrate 41 is greater than 1.6 to reduce material costs and increase the amount of light emitted from the light-emitting unit 20 at a normal viewing angle. Of course, in other embodiments of the present application, the refractive index of the substrate 41 may be greater than 1.6 to further reduce the refractive index difference between the substrate 41 and the light-emitting unit 20, thereby reducing the light efficiency loss caused by the light emitted from the light-emitting unit 20 at the interface between the substrate 41 and the light-emitting unit 20 due to the refractive index difference between the substrate 41 and the light-emitting unit 20 of the encapsulation layer 40.

[0040] In some embodiments of the present application, the thickness of the substrate 41 is greater than 10 microns to improve the packaging effect of the packaging glue, ensure the optical path of the light emitted from the light-emitting unit 20 at a normal viewing angle, and improve the display effect of the display panel.

[0041] In some embodiments of the present application, the encapsulation adhesive layer 40 further includes a plurality of diffusion particles 42 . The diffusion particles 42 are doped into the substrate 41 . The diffusion particles 42 include at least one of titanium dioxide, zirconium dioxide, and silicon dioxide.

[0042] In the display panel provided in the present application, the plurality of diffusion particles 42 doped in the substrate 41 can diffuse the light emitted by the light-emitting unit 20, thereby increasing the extraction efficiency of the light emitted by the light-emitting unit 20 at a normal viewing angle and improving the display brightness of the display panel at a normal viewing angle.

[0043] In some embodiments of the present application, the orthographic projection of the light emitting unit 20 on the array substrate 10 covers the orthographic projection of the diffusion particles 42 on the array substrate 10 .

[0044] In the display panel provided by the present application, since the orthographic projection of the light-emitting unit 20 on the array substrate 10 covers the orthographic projection of the diffusion particles 42 on the array substrate 10, it is possible to reduce the amount of diffusion particles 42 used and reduce material costs while taking into account the role of the packaging glue in increasing the extraction efficiency of the light emitted from the light-emitting unit 20 at the orthographic viewing angle.

[0045] In some embodiments of the present application, the display panel also includes a light extraction layer 50, which is arranged on the side of the encapsulation glue layer 40 away from the array substrate 10, wherein the light extraction layer 50 includes a first light extraction layer 51 and a second light extraction layer 52, and the refractive index of the first light extraction layer 51 is greater than the refractive index of the second light extraction layer 52, wherein the second light extraction layer 52 is arranged on the side of the first light extraction layer 51 away from the encapsulation glue layer 40, the first light extraction layer 51 includes a plurality of lenses 511 arranged in an array, and the second light extraction layer 52 covers the plurality of lenses 511; wherein each light-emitting unit 20 is correspondingly provided with a plurality of lenses 511 on the side away from the encapsulation glue layer 40.

[0046] In the display panel provided by the present application, since the refractive index of the first light extraction layer 51 is greater than the refractive index of the second light extraction layer 52, the first light extraction layer 51 includes a plurality of lenses 511 arranged in an array, the second light extraction layer 52 covers the plurality of lenses 511, and each light-emitting unit 20 is provided with a plurality of lenses 511 corresponding to the side facing away from the encapsulation layer 40. Therefore, at least part of the wide-angle output light of each light-emitting unit 20 can also be angularly deflected through the plurality of lenses 511 arranged on the side of the light-emitting unit 20 facing away from the encapsulation layer 40, so as to further increase the extraction efficiency of the positive-angle output light of the light-emitting unit 20.

[0047] In some embodiments of the present application, the number of lenses 511 correspondingly arranged on the side of the light-emitting unit 20 facing away from the packaging glue layer 40 is 10-20.

[0048] It should be noted that, in other embodiments of the present application, the first light extraction layer 51 includes a plurality of ribs arranged in sequence and spaced apart, each rib covers a plurality of light-emitting units 20 , and the second light extraction layer 52 covers a plurality of ribs.

[0049] In some embodiments of the present application, in a direction perpendicular to the array substrate 10, the cross-section of the light-emitting unit 20 is a trapezoid, the cross-section of the surface of the light-emitting unit 20 close to the array substrate 10 is the lower base of the trapezoid, and the cross-section of the surface of the light-emitting unit 20 away from the array substrate 10 is the upper base of the trapezoid.

[0050] In the display panel provided in the present application, the cross-section of the surface of the light-emitting unit 20 close to the array substrate 10 is the lower base of the trapezoid, and the cross-section of the surface of the light-emitting unit 20 away from the array substrate 10 is the upper base of the trapezoid, and the length of the upper base of the trapezoid is smaller than the lower base of the trapezoid.

[0051] In the embodiment of the present application, the width of the trapezoid gradually decreases in the direction away from the array substrate 10, and the cross-section of the light-emitting unit 20 is an "inverted trapezoid" with a narrow lower portion and an upper frame. On the one hand, the "inverted trapezoid" structure can increase the light-emitting area of ​​the light-emitting unit 20, and the light output is more uniform, thereby improving the display effect of the display panel; on the other hand, it can also enable the composite light-guiding portion 31 surrounding the outer periphery of the side wall 21 of the light-emitting unit 20 to have a better angle conversion effect at the interface between the first light-guiding portion 311 and the second light-guiding portion 312, so that more wide-angle output light in the output light of the light-emitting unit 20 is converted into positive-angle output light, thereby further improving the display brightness of the display panel at a positive viewing angle.

[0052] It should be noted that the light-emitting unit 20 made on a carrier substrate can be transferred to one side of the array substrate 10 through a transfer process, that is, the cross-section of the light-emitting unit 20 set on the carrier substrate is a "regular trapezoid" with a narrow top and a wide bottom. After the transfer process, the light-emitting unit 20 is flipped and set on one side of the array substrate 10, thereby forming an "inverted trapezoid" structure with a narrow bottom and a frame top.

[0053] In some embodiments of the present application, the orthographic projection of the light-emitting unit 20 on the array substrate 10 is in the shape of a rectangle. Accordingly, the first light-guiding portion 311 in the composite light-guiding portion 31 is a rectangular ring surrounding the periphery of the sidewall 21 of the light-emitting unit 20, and the second light-guiding portion 312 in the composite light-guiding portion 31 is a rectangular ring surrounding the periphery of the first light-guiding portion 311. However, the present application does not limit the shape of the orthographic projection of the light-emitting unit 20 on the array substrate 10. In other embodiments of the present application, the orthographic projection of the light-emitting unit 20 on the array substrate 10 may also be in the shape of a circle or other polygonal shape besides a rectangle. Accordingly, the first light-guiding portion 311 in the composite light-guiding portion 31 is a circular ring or other polygonal ring surrounding the periphery of the sidewall 21 of the light-emitting unit 20, and the second light-guiding portion 312 in the composite light-guiding portion 31 is a circular ring or other polygonal ring surrounding the periphery of the first light-guiding portion 311.

[0054] In some embodiments of the present application, the display panel also includes a polarizer and / or a cover plate arranged on the side of the light extraction layer 50 facing away from the encapsulation glue layer 40. The polarizer can reduce the reflectivity of ambient light on the light output side of the display panel. The cover plate is used to protect the display panel. The cover plate may include at least one of a hardening coating and an anti-reflective coating.

[0055] Figure 4 is a second schematic cross-sectional view of a portion of the display panel provided by the present application. The structure in Figure 2 is the same as or similar to that in Figure 4. For example, the structures of the dimming unit 30, encapsulating adhesive layer 40, and light extraction layer 50 in Figure 4 are the same as those in Figure 2 of the present application. The same parts in Figure 4 will not be described again in detail.

[0056] The difference is that: the display panel also includes multiple connecting parts 60, each connecting part 60 connects any two adjacent dimming parts 30, wherein the connecting part 60 includes at least one composite connecting part 61 arranged in sequence in the direction away from the array substrate 10, and the composite connecting part 61 corresponds one-to-one to the composite light guiding part 31, each composite connecting part 61 includes a first connecting part 611 and a second connecting part 612 arranged on the side of the first connecting part 611 away from the array substrate 10, the first connecting part 611 and the first light guiding part 311 are integrally formed, and the second connecting part 612 and the second light guiding part 312 are integrally formed.

[0057] In the display panel provided by the present application, since the connecting portion 60 connects any two adjacent dimming portions 30, the composite connecting portion 61 in the connecting portion 60 corresponds one-to-one with the composite light-guiding portion 31, and each composite connecting portion 61 includes a first connecting portion 611 integrally formed with the first light-guiding portion 311 and a second connecting portion 612 integrally formed with the second light-guiding portion 312 and arranged on a side of the first connecting portion 611 away from the array substrate 10. Therefore, the connecting portion 60 connecting any two adjacent dimming portions 30 has the same film layer structure as the dimming portion 30, and each dimming portion 30 can be connected as a whole through the connecting portion 60, so that each dimming portion 30 can be formed using the same film forming process, thereby ensuring the dimming effect of each dimming portion 30 while reducing the production cost, improving the stability of each dimming portion 30, and extending the life of the display panel.

[0058] In some embodiments of the present application, the included angle between the second connecting portion 612 and the second light guiding portion 312 is 30°-80°.

[0059] In the display panel provided by the present application, since the second connecting portion 612 and the second light guide portion 312 are integrally formed and have the same film forming process, when the angle between the second connecting portion 612 and the second light guide portion 312 is too large or too small, it will directly affect the film forming quality of the film layer in which the second connecting portion 612 and the second light guide portion 312 are located. By setting the angle between the second connecting portion 612 and the second light guide portion 312 to 30°-80°, the present application can improve the film forming quality of the film layer in which the second connecting portion 612 and the second light guide portion 312 are located, while ensuring that the composite light guide portion 31 in which the second light guide portion 312 is located improves the display brightness of the display panel at a normal viewing angle, thereby reducing the probability of fracture problems occurring at the junction of the second connecting portion 612 and the second light guide portion 312.

[0060] The present invention also provides a method for manufacturing a display panel, including:

[0061] An array substrate 10 is provided. The array substrate 10 includes a plurality of driving circuits.

[0062] A plurality of light-emitting units 20 are formed on the first side of the array substrate 10 , and the light-emitting units 20 are electrically connected to the driving circuit in the array substrate 10 , for example, by a bonding process.

[0063] At least one first light guide layer and at least one second light guide layer are sequentially deposited on the first side of the array substrate 10 , and the first light guide layers and the second light guide layers are alternately arranged. The refractive index of the first light guide layer is smaller than that of the second light guide layer.

[0064] A photoresist is formed on a side of at least one first light guide layer and at least one second light guide layer located in a gap area between two adjacent light-emitting units 20, facing away from the array substrate 10. The at least one first light guide layer and the at least one second light guide layer are patterned using the photoresist to remove the first light guide layer and the second light guide layer covering the light-emitting unit 20, and the photoresist is peeled off, thereby forming at least one composite light guide portion 31 arranged in sequence in a direction away from the side wall 21 of the light-emitting unit 20. The composite light guide portion 31 surrounds the periphery of the side wall 21 of the light-emitting unit 20. Each composite light guide portion 31 includes a first light guide portion 311 and a second light guide portion 312 arranged on a side of the first light guide portion 311 away from the side wall 21 of the light-emitting unit 20, and the refractive index of the first light guide portion 311 is less than the refractive index of the second light guide portion 312.

[0065] In some embodiments of the present application, the method for preparing a display panel also includes the following steps: forming a packaging glue layer 40 on the first side of the array substrate 10, the packaging glue layer 40 covering a plurality of light-emitting units 20 and a plurality of dimming parts 30, wherein the packaging glue includes a substrate 41, and the refractive index of the substrate 41 is greater than the refractive index of the first light guide part 311.

[0066] In this embodiment, the encapsulation layer 40 further includes a plurality of diffusion particles 42 . The diffusion particles 42 are doped into the base material 41 , and the orthographic projection of the light emitting unit 20 on the array substrate 10 covers the orthographic projection of the diffusion particles 42 on the array substrate 10 .

[0067] In some embodiments of the present application, the method for preparing the display panel also includes: forming a light extraction layer 50 on the side of the encapsulation glue layer 40 facing away from the array substrate 10, the light extraction layer 50 includes a first light extraction layer 51 and a second light extraction layer 52, and the refractive index of the first light extraction layer 51 is greater than the refractive index of the second light extraction layer 52.

[0068] Figure 5 is a third partial cross-sectional view of the display panel provided by the present application. It should be noted that the structure of Figure 5 is the same or similar to that of Figure 4 , and the same parts of the structure in Figure 5 will not be described again.

[0069] The difference is that: the display panel also includes a light extraction layer 50, which is arranged on the side of the encapsulation layer 40 away from the array substrate 10, wherein the light extraction layer 50 includes a first light extraction layer 51 and a second light extraction layer 52 arranged on the side of the first light extraction layer 51 away from the encapsulation layer 40, the refractive index of the first light extraction layer 51 is greater than the refractive index of the second light extraction layer 52, the first light extraction layer 51 includes a plurality of lenses 511 arranged in an array, and the second light extraction layer 52 covers the plurality of lenses 511; wherein, each light-emitting unit 20 is correspondingly provided with a lens 511 on the side away from the encapsulation layer 40, and the orthographic projection of the lens 511 on the array substrate 10 covers the orthographic projection of the light-emitting unit 20 on the array substrate 10.

[0070] In the display panel provided in the present application, since the refractive index of the first light extraction layer 51 is greater than the refractive index of the second light extraction layer 52, the first light extraction layer 51 includes a plurality of lenses 511 arranged in an array, the second light extraction layer 52 covers the plurality of lenses 511, and each light-emitting unit 20 is correspondingly provided with a lens 511 on the side facing away from the encapsulation layer 40, and the orthographic projection of the lens 511 on the array substrate 10 covers the orthographic projection of the light-emitting unit 20 on the array substrate 10. Therefore, at least part of the wide-angle output light of each light-emitting unit 20 can also be angularly deflected by the lens 511 arranged on the side of the light-emitting unit 20 facing away from the encapsulation layer 40, so as to further increase the extraction efficiency of the orthographic output light of the light-emitting unit 20, reduce the number of lenses 511, and reduce the process difficulty and production cost.

[0071] It should be noted that, in the direction perpendicular to the array substrate, the thickness of the lens 511 provided in FIG4 is thicker than that of the lens 511 in FIG2 . Therefore, correspondingly, the thickness of the encapsulation glue layer 40 in the display panel in FIG4 is thicker than that of the encapsulation glue layer 40 in FIG2 .

[0072] In some embodiments of the present application, the shape of the lens 511 in a cross section perpendicular to the array substrate 10 is hemispherical, and the edge of the lens 511 protrudes from the edge of the light emitting unit 20 by 1-2 micrometers.

[0073] Figure 6 is a fourth partial cross-sectional view of the display panel provided by the present application. It should be noted that the structure in Figure 6 is the same or similar to the structure in Figure 5, and the same parts of the structure in Figure 6 will not be described again.

[0074] The difference is that the display panel also includes a light extraction layer 50, which is arranged on the side of the encapsulation layer 40 away from the array substrate 10, wherein the light extraction layer 50 includes a first light extraction layer 51 and a second light extraction layer 52, the refractive index of the first light extraction layer 51 is greater than the refractive index of the second light extraction layer 52, the first light extraction layer 51 is arranged on the side of the second light extraction layer 52 away from the encapsulation layer, the second light extraction layer 52 includes a plurality of light extraction openings 521 arranged in an array, the plurality of light extraction openings 521 are arranged one-to-one corresponding to the plurality of light-emitting units 20, and the first light extraction layer 51 fills the light extraction openings 521.

[0075] In the display panel provided by the present application, since the light extraction layer 50 arranged on the side of the encapsulation glue layer 40 away from the array substrate 10 includes a first light extraction layer 51 and a second light extraction layer 52, the refractive index of the first light extraction layer 51 is greater than the refractive index of the second light extraction layer 52, the second light extraction layer 52 includes a plurality of light extraction openings 521 arranged in an array, and the plurality of light extraction openings 521 are arranged in a one-to-one correspondence with the plurality of light-emitting units 20, and the first light extraction layer 51 fills the light extraction openings 521. Therefore, at least part of the wide-angle output light of each light-emitting unit 20 can also be angularly deflected by the first light extraction layer 51 arranged in the light extraction opening 521, so as to further increase the extraction efficiency of the positive-angle output light of the light-emitting unit 20, and since the light extraction layer 50 does not include the lens 511, the preparation process is simpler and the production cost is lower.

[0076] In some embodiments of the present application, in order to further increase the extraction efficiency of the light emitted from the light-emitting unit 20 at a normal viewing angle, the thickness of the second light extraction layer 52 is above 2 microns, and the angle between the side wall 21 of the light extraction opening 521 and the normal projection of the side wall 21 of the light extraction opening 521 on the array substrate 10 is in the range of 30°-70°.

[0077] An embodiment of the present application further provides a display device, which includes a housing and the above-mentioned display panel. The housing has an accommodating space, and the display panel is disposed in the accommodating space.

[0078] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0079] The above is a detailed introduction to the technical solutions provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, wherein: The display panel comprises: An array substrate; A plurality of light emitting units are arranged on a first side of the array substrate; A plurality of dimming parts are arranged on the first side of the array substrate and are arranged one-to-one corresponding to the plurality of light-emitting units; Wherein, the dimming part includes at least one composite light guide part arranged in sequence in a direction away from the side wall of the light-emitting unit, and the composite light guide part is at least arranged around the periphery of the side wall of the light-emitting unit, and each of the composite light guide parts includes a first light guide part and a second light guide part arranged on a side of the first light guide part away from the side wall of the light-emitting unit, and the refractive index of the first light guide part is smaller than the refractive index of the second light guide part.

2. The display panel according to claim 1, wherein: The distance between one end of the side wall of the light-emitting unit away from the array substrate and the array substrate is a first distance, the distance between one end of the first light-guiding portion away from the array substrate and the array substrate is a second distance, and the distance between one end of the second light-guiding portion away from the array substrate and the array substrate is a third distance, wherein the second distance and the third distance are both greater than the first distance.

3. The display panel according to claim 1, wherein: The display panel also includes a packaging glue layer, which is arranged on the first side of the array substrate and covers the plurality of light-emitting units and the plurality of dimming parts, wherein the packaging glue includes a base material, and the refractive index of the base material is greater than the refractive index of the first light guide part.

4. The display panel according to claim 3, wherein: The packaging glue layer further includes a plurality of diffusion particles, the diffusion particles are doped into the substrate, and the diffusion particles include at least one of titanium dioxide, zirconium dioxide, and silicon dioxide.

5. The display panel according to claim 4, wherein: The orthographic projection of the light emitting unit on the array substrate covers the orthographic projection of the diffusion particle on the array substrate.

6. The display panel according to claim 3, wherein: The display panel also includes a light extraction layer, which is arranged on the side of the packaging glue layer away from the array substrate, wherein the light extraction layer includes a first light extraction layer and a second light extraction layer, and the refractive index of the first light extraction layer is greater than the refractive index of the second light extraction layer.

7. The display panel according to claim 6, wherein: The first light extraction layer includes a plurality of ribs that are sequentially spaced apart, each of the ribs covers a plurality of the light emitting units, and the second light extraction layer covers a plurality of the ribs.

8. The display panel according to claim 6, wherein: The cross section of the light emitting unit is a trapezoid, the cross section of the light emitting unit near the array substrate is the lower base of the trapezoid, and the cross section of the light emitting unit away from the array substrate is the upper base of the trapezoid.

9. The display panel according to claim 6, wherein: The second light extraction layer is arranged on a side of the first light extraction layer away from the encapsulation glue layer, the first light extraction layer comprises a plurality of lenses arranged in an array, and the second light extraction layer covers the plurality of lenses; Wherein, a plurality of lenses are correspondingly arranged on a side of each light-emitting unit away from the packaging adhesive layer.

10. The display panel according to claim 6, wherein: The second light extraction layer is arranged on a side of the first light extraction layer away from the encapsulation glue layer, the first light extraction layer comprises a plurality of lenses arranged in an array, and the second light extraction layer covers the plurality of lenses; Wherein, one lens is correspondingly arranged on a side of each light-emitting unit away from the packaging glue layer, and the orthographic projection of the lens on the array substrate covers the orthographic projection of the light-emitting unit on the array substrate.

11. The display panel according to claim 10, wherein: The shape of the lens in a cross section perpendicular to the array substrate is hemispherical.

12. The display panel according to claim 10, wherein: The distance that the edge of the lens protrudes from the edge of the light emitting unit is 1 to 2 micrometers.

13. The display panel according to claim 6, wherein: The first light extraction layer is arranged on a side of the second light extraction layer away from the packaging glue layer, the second light extraction layer includes a plurality of light extraction openings arranged in an array, the plurality of light extraction openings are arranged one-to-one corresponding to the plurality of light emitting units, and the first light extraction layer fills the light extraction openings.

14. The display panel according to claim 13, wherein: The thickness of the second light extraction layer is greater than 2 micrometers.

15. The display panel according to claim 13, wherein: The angle between the side wall of the light extraction opening and the orthographic projection of the side wall of the light extraction opening on the array substrate ranges from 30° to 70°.

16. The display panel according to claim 1, wherein: The display panel also includes a plurality of connecting parts, each of which connects any two adjacent dimming parts, wherein the connecting part includes at least one composite connecting part sequentially arranged in a direction away from the array substrate, and the composite connecting part corresponds one-to-one with the composite light guiding part, and each of the composite connecting parts includes a first connecting part and a second connecting part arranged on a side of the first connecting part away from the array substrate, the first connecting part is integrally formed with the first light guiding part, and the second connecting part is integrally formed with the second light guiding part.

17. The display panel according to claim 16, wherein: An included angle between the second connecting portion and the second light guiding portion ranges from 30° to 80°.

18. The display panel according to any one of claims 1 to 17, wherein: The light emitting unit is a semiconductor chip.

19. The display panel according to any one of claims 1 to 17, wherein: A refractive index of the light emitting unit is greater than a refractive index of the first light guiding portion.

20. A display device, wherein: The display device comprises a housing and a display panel as claimed in any one of claims 1 to 19, the housing having an accommodating space, and the display panel is arranged in the accommodating space.

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