Display panel and manufacturing method

Abstract

The present application provides a display panel and a manufacturing method thereof, the display panel including a substrate, a driving circuit layer, a plurality of light emitting units, and a black matrix layer, the black matrix layer being located between adjacent light emitting units, the light emitting units being offset from the driving elements, the common electrodes, and the signal lines, and the light emitting elements being emitting light toward the quantum dot layer to excite the quantum dot layer to emit light. The present application provides a full-color display panel that emits light toward the substrate, and improves the electrodes of the driving transistors and / or the switching transistors to reduce the effect of the emitted light on the active part of the driving transistors and / or the active part of the switching transistors when the light emitting units emit light toward the substrate, thereby improving the light emission effect of the display panel according to the present application and reducing the effect of the emitted light on the devices of the display panel.

Description

[Technical Field]

[0001] This application claims priority from Chinese Patent Application No. 202210910571.3, filed on July 29, 2022, the entire contents of which are incorporated herein by reference. The present application relates to the technical field of displays, in particular to display panels and manufacturing methods. [Background technology]

[0002] Inorganic micro light emitting diode (Micro LED) displays are one of the focuses of current display research. Compared with OLED displays, Micro LEDs have advantages such as high reliability, low power consumption, high brightness, and fast response. In the production of Micro LED displays, achieving full color for inorganic micro light emitting diode displays has become an important and urgent research direction. Summary of the Invention [Problem to be solved by the invention]

[0003] The main technical problem that this application aims to solve is to realize full color display of inorganic micro light emitting diode displays. [Means for solving the problem]

[0004] The technical solution adopted by the present application to solve the above technical problems is: A display panel, A substrate; a driving circuit layer provided on one side of the substrate and including a plurality of driving elements, a plurality of common electrodes, and a plurality of signal wirings; a plurality of light-emitting units arranged in an array on a side of the driving circuit layer away from the substrate, the light-emitting units including a quantum dot layer and a light-emitting element, the light-emitting element including a light-emitting layer, a first electrode, and a second electrode; a black matrix layer disposed on a side of the driving circuit layer away from the substrate and positioned between adjacent light emitting units; the light-emitting unit is positioned offset from the driving element, the common electrode, and the signal wiring, the light-emitting element is located on the side of the quantum dot layer away from the substrate, and the first electrode and the second electrode are located on the side of the light-emitting layer opposite the substrate, thereby allowing the light-emitting element to emit light toward the quantum dot layer and excite the quantum dot layer to emit light; the black matrix layer has a first hole and a second hole, the first hole extends to the driving circuit layer to expose the driving element, and the second hole extends to the driving circuit layer to expose the common electrode, the first electrode is electrically connected to the driving element through the first hole, and the second electrode is electrically connected to the common electrode through the second hole.

[0005] In some embodiments, the black matrix layer and the light-emitting units are directly disposed on a surface of the driving circuit layer away from the substrate; or The display panel further includes a flat layer disposed on a side of the driving circuit layer remote from the substrate, and the black matrix layer and the light emitting units are disposed on the surface of the flat layer remote from the substrate.

[0006] In some embodiments, the black matrix layer has a thickness greater than that of the light-emitting units, covers the light-emitting units, and further includes a third hole exposing the first electrode and a fourth hole exposing the second electrode; or the thickness of the black matrix layer is equal to or less than the thickness of the light-emitting unit; The display panel further includes a first covering layer covering the black matrix layer and the light-emitting unit, and the first covering layer has a fifth hole exposing the first electrode and a sixth hole exposing the second electrode, and both the fifth hole and the sixth hole penetrate the first covering layer.

[0007] In some embodiments, the drive element comprises: a drive transistor disposed on one side of the substrate; The driving transistor includes at least a first active section, a first gate, a third electrode, and a fourth electrode, the third electrode and the fourth electrode being provided on a side of the first active section away from the substrate and being provided on opposing sides of the first active section with a gap in a first direction, and the third electrode and / or the fourth electrode having a first protrusion extending to opposing sides of the first active section in a second direction perpendicular to the first direction and preventing light emitted from the light-emitting element from being irradiated onto the first active section.

[0008] In some embodiments, a first protrusion is provided on both the third electrode and the fourth electrode, and the first protrusion of the third electrode and the first protrusion of the fourth electrode are offset from each other so that their projections on the side surfaces of the first active portion partially overlap.

[0009] In some embodiments, the driving element further includes a switching transistor disposed on a side of the driving transistor away from the substrate, the switching transistor including a second active section, a second gate, a fifth electrode, and a sixth electrode, the fifth electrode and the sixth electrode being disposed on a side of the second active section closer to the substrate.

[0010] In some embodiments, the fifth electrode and the sixth electrode are arranged on opposite sides of the second active section with a gap in the first direction, and the fifth electrode and / or the sixth electrode have second protrusions that extend to opposite sides of the second active section in a second direction perpendicular to the first direction and prevent light reflected by the third electrode and the fourth electrode from being irradiated onto the second active section.

[0011] In some embodiments, the first gate is located on a side of the first active portion away from the substrate, and the second gate is located on a side of the second active portion closer to the substrate.

[0012] In some embodiments, the display panel further includes a light absorbing layer provided on a surface of each of the second active units that is closer to the substrate.

[0013] In order to solve the above technical problems, another technical solution adopted by the present application is: A method for manufacturing a display panel, comprising: fabricating a driving circuit layer on a substrate, the driving circuit layer including a driving element, a common electrode, and a signal wiring; providing a light-emitting unit layer on a side of the driving circuit layer away from the substrate; the light-emitting unit layer includes a plurality of light-emitting units arranged in an array and a black matrix layer, the black matrix layer being located between adjacent light-emitting units; the light-emitting units include a quantum dot layer and a light-emitting element; the light-emitting element includes a light-emitting layer, a first electrode, and a second electrode; the light-emitting units are arranged at a position offset from the driving element, the common electrode, and the signal wiring; the light-emitting element is located on the side of the quantum dot layer away from the substrate; and the first electrode and the second electrode are located on the side of the light-emitting layer opposite the substrate, thereby allowing the light-emitting element to emit light toward the quantum dot layer and excite the quantum dot layer to emit light; the black matrix layer has first and second holes; the first hole extends to the driving circuit layer to expose the driving element; and the second hole extends to the driving circuit layer to expose the common electrode; the first electrode is electrically connected to the driving element through the first hole; and the second electrode is electrically connected to the common electrode through the second hole. [Effects of the Invention]

[0014] Beneficial effects In a display panel and a manufacturing method according to an embodiment of the present application, the display panel includes a substrate, a driving circuit layer, a plurality of light-emitting units, and a black matrix layer. The driving circuit layer includes a plurality of driving elements, a plurality of common electrodes, and a plurality of signal wirings. The light-emitting units include a quantum dot layer and light-emitting elements. The light-emitting elements include a light-emitting layer, a first electrode, and a second electrode. The black matrix layer is located between adjacent light-emitting units. The light-emitting units are offset from the driving elements, the common electrode, and the signal wirings. The light-emitting elements are located on the quantum dot layer away from the substrate. The first and second electrodes are located on the light-emitting layer opposite the substrate. The light-emitting elements emit light toward the quantum dot layer, exciting the quantum dot layer to emit light. The black matrix layer has first and second holes. The first holes extend to the driving circuit layer to expose the driving elements, and the second holes extend to the driving circuit layer to expose the common electrode. The first electrodes are electrically connected to the driving elements through the first holes, and the second electrodes are electrically connected to the common electrode through the second holes. An embodiment of the present application provides a full-color display panel that emits light toward the substrate, and by improving the electrodes of the driving transistors and / or switching transistors, when the light-emitting units emit light toward the substrate, the improved electrodes of the driving transistors and / or switching transistors reduce the impact of the emitted light on the active parts of the driving transistors and / or switching transistors, thereby improving the light emission effect of the display panel according to the embodiment of the present application and reducing the impact of the emitted light on the devices of the display panel. [Brief explanation of the drawings]

[0015] In order to more clearly explain the technical solutions of the embodiments of the present application or the prior art, the drawings necessary for explaining the embodiments or the prior art will be briefly described below. However, the drawings described below are only a part of the embodiments of the present application, and it is obvious that a person skilled in the art can obtain other drawings based on these drawings without any creative efforts. [Figure 1] 1 is a structural schematic diagram of a display panel according to a first embodiment of the present invention; [Figure 2]2 is a structural schematic diagram of a first embodiment of a driving transistor of the display panel shown in FIG. 1. FIG. [Figure 3] 1. FIG. 4 is a structural schematic diagram of a second embodiment of a driving transistor of the display panel shown in FIG. [Figure 4] FIG. 2 is a structural schematic diagram of a display panel according to a second embodiment of the present invention. [Figure 5] FIG. 10 is a structural schematic diagram of a display panel according to a third embodiment of the present invention. [Figure 6] FIG. 10 is a structural schematic diagram of a display panel according to a fourth embodiment of the present invention. [Figure 7] 7 is a structural schematic diagram of a switching transistor of the display panel shown in FIG. 6. [Figure 8] FIG. 10 is a structural schematic diagram of a display panel according to a fifth embodiment of the present invention. [Figure 9] FIG. 10 is a structural schematic diagram of a display panel according to a sixth embodiment of the present invention. [Figure 10] 1 is a flowchart of a method for manufacturing a display panel according to the present application. DETAILED DESCRIPTION OF THE INVENTION

[0016] The technical solutions in the embodiments of the present application will be described below clearly and completely with reference to the drawings in the embodiments of the present application, but it is clear that the described embodiments are only some of the embodiments of the present application, and do not represent all of the embodiments. All other embodiments that a person skilled in the art can obtain based on the embodiments of the present application without any creative efforts belong to the patent scope of the present application.

[0017] The terms "first," "second," and "third" used herein are for descriptive purposes only and are not understood to indicate or imply relative importance or the number of technical features depicted. Thus, a feature qualified as "first," "second," or "third" can explicitly or implicitly include at least one such feature. In the description herein, "plurality" means at least two, e.g., two, three, etc., unless otherwise expressly specified. All directional indications (e.g., up, down, left, right, front, rear, etc.) in the examples herein are used solely to describe the relative positional relationships, movements, etc., between components in a particular position (as shown in the drawings); a change in this position will result in a corresponding change in this directional indication. Furthermore, the terms "comprise" and "have," as well as variations thereof, are intended to cover a non-exclusive inclusion. For example, processes, methods, systems, products, or apparatuses that include a series of steps or units are not limited to the listed steps or units and may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to those processes, methods, products, or apparatuses.

[0018] An "embodiment" described herein means that a particular feature, structure, or characteristic described with reference to the embodiment may be included in at least one embodiment of the present application. The use of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor does it imply separate or alternative embodiments that are mutually exclusive of other embodiments. As those skilled in the art will understand, both explicitly and implicitly, the embodiments described herein may be combined with other embodiments.

[0019] The present invention will be described in detail below with reference to the drawings and examples.

[0020] As shown in Figures 1 and 2, Figure 1 is a structural schematic diagram of a display panel according to a first embodiment of the present invention, Figure 2 is a structural schematic diagram of a first embodiment of a driving transistor of the display panel shown in Figure 1, and Figure 3 is a structural schematic diagram of a second embodiment of a driving transistor of the display panel shown in Figure 1.

[0021] As shown in FIG. 1 , a display panel 100 according to the present application includes a substrate 10, a driving circuit layer 20, a plurality of light-emitting units 30, and a black matrix layer 40. The driving circuit layer 20 is provided on one side of the substrate 10 and includes a plurality of driving elements 21, a plurality of common electrodes 22, and a plurality of signal wirings (not shown). The plurality of light-emitting units 30 are provided in an array on the side of the driving circuit layer 20 away from the substrate 10. Each light-emitting unit 30 includes a quantum dot layer 31 and a light-emitting element 32. Each light-emitting element 32 includes a light-emitting layer 32 a, a first electrode 32 b, and a second electrode 32 c. The black matrix layer 40 is provided on the side of the driving circuit layer 20 away from the substrate 10 and is located between adjacent light-emitting units 30. Furthermore, in this embodiment, the light-emitting units 30 are offset from the driving elements 21, the common electrode 22, and the signal wiring (not shown), allowing the light-emitting units 30 to emit light toward one side of the substrate 10 and preventing the driving circuit layer 20 from blocking the light emitted by the light-emitting units 30. The light-emitting elements 32 in this embodiment are micro LEDs, and in this embodiment, the micro LEDs are used to emit the first light. Specifically, the first electrode 32b of the micro LED is electrically connected to the driving elements 21, and the second electrode 32c of the micro LED is electrically connected to the common electrode 22. In this embodiment, to ensure light emission and light emission efficiency from the light-emitting elements 32 of the display panel 100 to the substrate 10, the quantum dot layer 31 on the surface closest to the substrate 10, which extends between the substrates 10, is made of a transparent material. The substrates 10 are also made of a transparent material.

[0022] Specifically, in a specific embodiment of the present application, the quantum dot layer 31 includes a red quantum dot layer, a green quantum dot layer, and a transparent quantum dot layer, and the quantum dot layer 31 transmits the first light to the second light emitted from the quantum dot layer. In this embodiment, the first light is blue light, and the second light includes red light, green light, or blue light. In this specific embodiment, the display panel 100 is provided, thereby realizing full-color display of the display panel 100.

[0023] Specifically, in this embodiment, the light-emitting element 32 is located on the side of the quantum dot layer 31 away from the substrate 10, so that the light-emitting element 32 emits light toward one side of the substrate 10. The first electrode 32b and the second electrode 32c of the light-emitting element 32 are located on the side opposite the substrate 10 from the light-emitting layer 32a, so that the light-emitting element 32 emits light toward the quantum dot layer 31, exciting the quantum dot layer 31 to emit light. Furthermore, the black matrix layer 40 in this embodiment has a first hole 41 and a second hole 42. The first hole 41 extends to the driving circuit layer 20 to expose the driving element 21, and the second hole 42 extends to the driving circuit layer 20 to expose the common electrode 22. Specifically, the first electrode 32b of the light-emitting element 32 is electrically connected to the driving element 21 through the first hole 41, and the second electrode 32c is electrically connected to the common electrode 22 through the second hole 42.

[0024] In the prior art, driving circuits are typically electrically connected to light-emitting elements and pixel circuits by opening vias in the planar layer. However, depending on actual needs, the planar layer typically requires a large thickness, which increases the depth of the vias opened in the planar layer, making it difficult to effectively deposit conductive material in the vias. The excessively thick deposition of the conductive material can lead to problems such as short circuits between electrodes. In the prior art, the planar layer is typically made of an inorganic insulating material that is difficult to deposit on the display panel 100, further complicating the deposition of the planar layer. Furthermore, when providing light-emitting elements such as micro light-emitting diodes on the planar layer, grooves must be opened in the planar layer, which further increases the process difficulty.

[0025] In this embodiment, the black matrix layer 40 and the light emitting units 30 are directly disposed on the side of the driving circuit layer 20 away from the substrate 10, thereby significantly shortening the manufacturing process of the display panel 100 and reducing the difficulty of the process. The black matrix layer 40 also functions as a planarizing layer in addition to providing a light-blocking effect. Compared with the prior art, in this embodiment, the black matrix layer 40 and the light emitting units 30 are directly disposed on the side of the driving circuit layer 20 away from the substrate 10, and the black matrix layer 40 has first and second holes 41 and 42 for electrically connecting the light emitting elements 32 and the driving circuit layer 20. This eliminates the need for a planarizing layer or reduces its thickness. Furthermore, the first and second holes 41 and 42 of the black matrix layer 40 in this embodiment have appropriate thicknesses, eliminating problems such as excessive deposition of conductive material. Furthermore, in the embodiment of the present application, when providing the black matrix layer 40, there is no need to drill grooves on the surface of the black matrix layer 40 away from the substrate 10, and the light-emitting units 30 can be directly provided in the holes or through-holes of the black matrix layer 40, thus reducing the difficulty of the process.

[0026] Furthermore, the black matrix layer 40 of this embodiment is thicker than the light-emitting units 30 and covers the light-emitting units 30. Furthermore, the black matrix layer 40 of this embodiment further has third holes 43 that expose the first electrodes 32b of the light-emitting elements 32 and fourth holes 44 that expose the second electrodes 32c.

[0027] Specifically, the driving element 21 of this embodiment is a driving transistor, and is provided on one side of the substrate 10, and includes at least a first active portion 21a, a first gate 21b, a third electrode 21c, and a fourth electrode 21d, where the third electrode 21c and the fourth electrode 21d are provided on the side of the first active portion 21a away from the substrate 10, and are provided on opposing sides of the first active portion 21a with a gap in the first direction X. In this embodiment, the third electrode 21c and / or the fourth electrode 21d have a first protrusion 21e that extends to opposing sides of the first active portion 21a in a second direction Y perpendicular to the first direction X and blocks light emitted from the light-emitting element 32 from irradiating the first active portion 21a.

[0028] 2, in this embodiment, only the fourth electrode 21d of the driving transistor has first protrusions 21e on both opposing sides in the second direction Y. With this configuration, the fourth electrode 21d having the first protrusions 21e has a certain blocking effect on light emitted from the light-emitting element 32 toward the substrate 10 and a certain blocking effect on the first active unit 21a. However, even when only the third electrode 21c of the driving transistor has first protrusions 21e on both opposing sides in the second direction Y, it also has a certain blocking effect on light emitted from the light-emitting element 32 toward the substrate 10 and a certain blocking effect on the first active unit 21a. However, the first protrusions 21e may be arranged on one side of the third electrode 21c and / or the fourth electrode 21d in the second direction Y.

[0029] 3, the third electrode 21c and the fourth electrode 21d of the drive transistor in this embodiment both have a first protrusion 21e, and this configuration effectively blocks light emitted from the light-emitting element 32 toward the substrate 10 and prevents the light from reaching the first active unit 21a. Furthermore, in this embodiment, the first protrusion 21e of the third electrode 21c and the first protrusion 21e of the fourth electrode 21d are offset from each other, so that their projections on the side surfaces of the first active unit 21a partially overlap, thereby completely blocking light from reaching the first active unit 21a.

[0030] As shown in FIG. 4, FIG. 4 is a structural schematic diagram of a display panel according to a second embodiment of the present invention.

[0031] 4, the display panel 100 of this embodiment differs from the display panel 100 of the first embodiment in the following respects. The display panel 100 of this embodiment further includes a flat layer 50 provided on the side of the driving circuit layer 20 away from the substrate 10, and the black matrix layer 40 and the light-emitting units 30 are provided on the surface of the flat layer 50 away from the substrate 10. In this embodiment, the flat layer 50 is provided on the surface of the driving circuit layer 20 away from the substrate 10, which makes it easier to improve the flatness of the surface of the driving circuit layer 20 and to arrange the black matrix layer 40 and the light-emitting units 30 on the surface of the flat layer 50 away from the substrate 10.

[0032] As shown in FIG. 5, FIG. 5 is a structural schematic diagram of a display panel according to a third embodiment of the present invention.

[0033] As shown in FIG. 5 , the display panel 100 of this embodiment differs from the display panel 100 of the first embodiment in the following respects. In this embodiment, the thickness of the black matrix layer 40 is equal to or less than the thickness of the light-emitting units 30. To flatten the black matrix layer 40 and the light-emitting units 30, the display panel 100 of this embodiment further includes a first covering layer 60 covering the black matrix layer 40 and the light-emitting units 30. The first covering layer 60 includes a fifth hole 61 exposing the first electrode 32b of the light-emitting element 32 and a sixth hole 62 exposing the second electrode 32c. The first covering layer 60 provides excellent protection for the first electrode 32b and the second electrode 32c of the light-emitting element 32. Both the fifth hole 61 and the sixth hole 62 penetrate the first covering layer 60. However, in some specific embodiments, in the display panel 100, a flat layer 50 is provided on the surface of the driving circuit layer 20 away from the substrate 10, and a first covering layer 60 is provided on the surfaces of the black matrix layer 40 and the light-emitting unit 30 away from the substrate 10, so that the display panel 100 has good flatness on the surface of the driving circuit layer 20 away from the substrate 10 and the first electrode 32b and the second electrode 32c of the light-emitting element 32 are reliably protected.

[0034] As shown in FIGS. 6 and 7, FIG. 6 is a structural schematic diagram of a display panel according to a fourth embodiment of the present invention, and FIG. 7 is a structural schematic diagram of a switching transistor of the display panel shown in FIG.

[0035] 6, the display panel 100 according to this embodiment differs from the display panel 100 according to the first embodiment in the following respects. The drive circuit layer 20 of the display panel 100 according to this embodiment further includes a switching transistor layer 23, which is disposed on the side of the drive transistor away from the substrate 10 and includes a plurality of switching transistors 231. Specifically, the switching transistor 231 includes a second active portion 231a, a second gate 231b, a fifth electrode 231c, and a sixth electrode 231d, and the fifth electrode 231c and the sixth electrode 231d are located on the side of the second active portion 231a closer to the substrate 10. In this embodiment, the fifth electrode 231c of the switching transistor 231 is electrically connected to the first gate 21b of the drive transistor to control the drive transistor to be turned on or off. In some specific embodiments, the sixth electrode 231d of the switching transistor 231 is electrically connected to a scanning signal line, the fifth electrode 231c of the switching transistor 231 is electrically connected to the first gate 21b of the driving transistor, the third electrode 21c of the driving transistor is electrically connected to a data signal line, and the fourth electrode 21d of the driving transistor is electrically connected to the first electrode 32b of the light-emitting element 32.

[0036] 7, the fifth electrode 231c and the sixth electrode 231d of the switching transistor 231 according to the present embodiment are provided on opposing sides of the second active portion 231a with a gap in the first direction X, and the fifth electrode 231c and / or the sixth electrode 231d have second protrusions 231e that extend to opposing sides of the second active portion 231a in the second direction Y perpendicular to the first direction X and block light reflected by the third electrode 21c and the fourth electrode 21d of the driving transistor from irradiating the second active portion 231a. Specifically, both the fifth electrode 231c and the sixth electrode 231d according to the present embodiment have the second protrusions 231e, and this configuration effectively blocks light reflected by the third electrode 21c and the fourth electrode 21d of the driving transistor from irradiating the second active portion 231a. Furthermore, in this embodiment, the second protrusion 231e of the fifth electrode 231c and the second protrusion 231e of the sixth electrode 231d are arranged at offset positions, so that their projections on the side surfaces of the second active portion 231a partially overlap, thereby completely blocking light from the second active portion 231a.

[0037] As shown in FIG. 8, FIG. 8 is a structural schematic diagram of a display panel according to a fifth embodiment of the present invention.

[0038] As shown in FIG. 8, the display panel 100 of this embodiment differs from the display panel 100 of the fourth embodiment in the following respects. In this embodiment, the drive transistor uses a top-gate structure, and the first gate 21b of the drive transistor is located on the side of the first active unit 21a that is farther from the substrate 10. The switching transistor 231 uses a bottom-gate structure, and the second gate 231b of the switching transistor 231 is located on the side of the second active unit 231a that is closer to the substrate 10. In this configuration, the second gate 231b functions as a blocking layer for the second active unit 231a, thereby improving the degree of blocking of light to the second active unit 231a.

[0039] As shown in FIG. 9, FIG. 9 is a structural schematic diagram of a display panel according to a sixth embodiment of the present invention.

[0040] 9, the display panel 100 according to this embodiment differs from the display panel 100 according to the fourth embodiment in the following respects: The display panel 100 according to this embodiment further includes a light absorbing layer 70 provided on a surface of the second active portion 231a of each switching transistor 231 that is closer to the substrate 10, and that further blocks light reflected by the third electrode 21c and the fourth electrode 21d of the driving transistor from being irradiated onto the second active portion 231a.

[0041] As shown in FIG. 10, FIG. 10 is a flowchart of a method for manufacturing a display panel according to the present invention.

[0042] As shown in FIG. 10, the method for manufacturing the display panel 100 according to the embodiment of the present application includes the following steps S1 and S2. S1: A driving circuit layer 20 including a plurality of driving elements 21, a plurality of common electrodes 22, and a plurality of signal wirings is manufactured on the substrate 10. S2: A light-emitting unit layer is provided on the side of the driving circuit layer 20 away from the substrate 10. The light-emitting unit layer includes a plurality of light-emitting units 30 arranged in an array and a black matrix layer 40, with the black matrix layer 40 located between adjacent light-emitting units 30. The light-emitting unit 30 includes a quantum dot layer 31 and a light-emitting element 32. The light-emitting element 32 includes a light-emitting layer 32a, a first electrode 32b, and a second electrode 32c. The light-emitting unit 30 is provided so as to be offset from the driving element 21, the common electrode 22, and the signal wiring.

[0043] The light-emitting element 32 is located on the side of the quantum dot layer 31 away from the substrate 10. The first electrode 32b and the second electrode 32c are located on the side of the light-emitting layer 32a opposite the substrate 10, so that the light-emitting element 32 emits light toward the quantum dot layer 31, exciting the quantum dot layer 31 to emit light. The black matrix layer 40 has a first hole 41 and a second hole 42. The first hole 41 extends to the drive circuit layer 20 to expose the drive element 21, and the second hole 42 extends to the drive circuit layer 20 to expose the common electrode 22. The first electrode 32b is electrically connected to the drive element 21 through the first hole 41, and the second electrode 32c is electrically connected to the common electrode 22 through the second hole 42.

[0044] In this embodiment, the black matrix layer 40 is arranged in at least two ways:

[0045] Method 1 The light emitting units 30 are provided in an array on the surface of the driving circuit layer 20 or the first covering layer 60 away from the substrate 10 . Holes in the form of a matrix are opened in the black matrix layer 40, and the holes correspond to the light-emitting units 30 one-to-one. The perforated black matrix layer 40 is transferred to the side of the light-emitting units 30 present in the form of a matrix, away from the substrate 10, and the black matrix layer 40 and the light-emitting units 30 are bonded together.

[0046] Method 2 A black matrix layer 40 including a plurality of through holes is provided on the surface of the driving circuit layer 20 or the first covering layer 60 away from the substrate 10 . A plurality of quantum dot layers 31 are provided in each of the plurality of through holes of the black matrix layer 40, and a plurality of light emitting elements 32 are provided on each of the surfaces of the quantum dot layers 31 that are remote from the substrate 10.

[0047] It should be understood that in some embodiments of the present application, the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely schematic, and the division of units is merely a division of logical functions. In actual implementation, there may be other divisions, such as multiple units or components being combined or integrated into another system, or some features being ignored or not implemented. Furthermore, the shown or discussed couplings or direct couplings or communication connections between each other may be indirect couplings or communication connections via some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0048] In addition, the functional units in various embodiments of the present application may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The integrated unit may be realized in the form of hardware or in the form of a software functional unit.

[0049] The above are merely examples of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent transformation of the flow made by using the contents of the specification and drawings of the present application, or any direct or indirect application to other related technical fields, shall all be included in the patent protection scope of the present application. [Explanation of symbols]

[0050] 100 Display Panel 10 Substrate 20 Drive Circuit Layer 30 Lighting Unit 40 Black matrix layer 50 flat layer 60 1st coating layer 70 Light absorbing layer 21 Drive element 22 Common electrode 21a 1st Active Section 21b Gate 1 21c 3rd electrode 21d 4th electrode 21e 1st protrusion 23 Switching transistor layer 231 Switching Transistor 231a Second Active Section 231b 2nd Gate 231c 5th electrode 231d 6th electrode 231e 2nd protrusion 31 quantum dot layer 32 Light-emitting element 32a Light-emitting layer 32b 1st electrode 32c 2nd electrode 41 Hole 1 42 Hole 2 43 Hole 3 44 Hole 4 61 Hole 5 62 Hole 6

Claims

1. A display panel, A substrate; a driving circuit layer provided on one side of the substrate and including a plurality of driving elements, a plurality of common electrodes, and a plurality of signal wirings; a plurality of light-emitting units arranged in an array on a side of the driving circuit layer away from the substrate, the light-emitting units including a quantum dot layer and a light-emitting element, the light-emitting element including a light-emitting layer, a first electrode, and a second electrode; a black matrix layer disposed on a side of the driving circuit layer away from the substrate and positioned between adjacent light emitting units; the light-emitting unit is disposed at a position offset from the driving element, the common electrode, and the signal wiring, the light-emitting element is located on a side of the quantum dot layer away from the substrate, the first electrode and the second electrode are disposed on the side of the light-emitting layer opposite the substrate, whereby the light-emitting element emits light toward the quantum dot layer and excites the quantum dot layer to emit light; the black matrix layer has a first hole and a second hole, the first hole extends to the driving circuit layer to expose the driving element, and the second hole extends to the driving circuit layer to expose the common electrode, the first electrode is electrically connected to the driving element through the first hole, and the second electrode is electrically connected to the common electrode through the second hole; the driving element includes a driving transistor provided on one side of the substrate; a first gate, a third electrode, and a fourth electrode, the third electrode and the fourth electrode being provided on a side of the first active section away from the substrate and spaced apart in a first direction on opposing sides of the first active section, the third electrode and / or the fourth electrode having a first protrusion extending on opposing sides of the first active section in a second direction perpendicular to the first direction and preventing light emitted from the light-emitting element from being irradiated onto the first active section.

2. the black matrix layer and the light-emitting units are directly disposed on the surface of the driving circuit layer away from the substrate; or 2. The display panel according to claim 1, further comprising a flat layer provided on a side of the driving circuit layer away from the substrate, the black matrix layer and the light-emitting units being provided on a surface of the flat layer away from the substrate.

3. the black matrix layer is thicker than the light-emitting units, covers the light-emitting units, and further includes a third hole exposing the first electrode and a fourth hole exposing the second electrode; or the thickness of the black matrix layer is equal to or less than the thickness of the light-emitting unit; 2. The display panel of claim 1, further comprising a first covering layer covering the black matrix layer and the light-emitting unit, the first covering layer having a fifth hole exposing the first electrode and a sixth hole exposing the second electrode, the fifth hole and the sixth hole both penetrating the first covering layer.

4. 2. The display panel of claim 1, wherein a first protrusion is provided on both the third electrode and the fourth electrode, and the first protrusion of the third electrode and the first protrusion of the fourth electrode are offset from each other so that projections on the side surfaces of the first active section partially overlap.

5. 2. The display panel of claim 1, wherein the driving element further includes a switching transistor provided on a side of the driving transistor away from the substrate, the switching transistor including a second active section, a second gate, a fifth electrode, and a sixth electrode, the fifth electrode and the sixth electrode being provided on a side of the second active section away from the substrate.

6. 6. The display panel of claim 5, wherein the fifth electrode and the sixth electrode are arranged on opposing sides of the second active section with a gap in the first direction, and the fifth electrode and / or the sixth electrode have second protrusions that extend to opposing sides of the second active section in a second direction perpendicular to the first direction and prevent light reflected by the third electrode and the fourth electrode from being irradiated onto the second active section.

7. The display panel of claim 5 , wherein the first gate is located on a side of the first active section that is farther from the substrate, and the second gate is located on a side of the second active section that is closer to the substrate.

8. The display panel according to claim 5 , further comprising a light absorbing layer provided on a surface of each of the second active sections that is closer to the substrate.

9. The display panel according to claim 1 , wherein the substrate is made of a transparent material.

10. The display panel according to claim 1 , wherein the light emitting element is a micro light emitting diode, and is used to emit the first light.

11. The display panel according to claim 1 , wherein a transparent material is used for the entire region of said quantum dot layer extending from the surface of said quantum dot layer closest to said substrates to between said substrates.

12. 11. The display panel of claim 10, wherein the quantum dot layer includes a red quantum dot layer, a green quantum dot layer, and a transparent quantum dot layer, and the quantum dot layer converts the first light into a second light emitted from the quantum dot layer.

13. The display panel according to claim 12 , wherein the first light is blue light, and the second light includes red light, green light, or blue light.

14. The display panel according to claim 1 , wherein the driving transistor uses a top gate structure.

15. The display panel according to claim 5 , wherein the switching transistor has a bottom gate structure.

16. A method for manufacturing a display panel, comprising: fabricating a driving circuit layer on a substrate, the driving circuit layer including a driving element, a common electrode, and a signal wiring; providing a light-emitting unit layer on a side of the driving circuit layer away from the substrate; the light-emitting unit layer includes a plurality of light-emitting units arranged in an array and a black matrix layer, the black matrix layer being located between adjacent light-emitting units, the light-emitting units including a quantum dot layer and a light-emitting element, the light-emitting element including a light-emitting layer, a first electrode, and a second electrode, the light-emitting units being arranged to be offset from the driving elements, the common electrode, and the signal wiring, the light-emitting elements being located on a side of the quantum dot layer away from the substrate, the first electrode and the second electrode being located on a side of the light-emitting layer opposite the substrate, whereby the light-emitting elements emit light toward the quantum dot layer and excite the quantum dot layer to emit light, the black matrix layer having a first hole and a second hole, the first hole extending to the driving circuit layer to expose the driving elements, and the second hole extending to the driving circuit layer to expose the common electrode, the first electrode being electrically connected to the driving elements through the first hole, and the second electrode being electrically connected to the common electrode through the second hole, the driving element includes a driving transistor provided on one side of the substrate; a first gate, a third electrode, and a fourth electrode, the third electrode and the fourth electrode being provided on a side of the first active section away from the substrate and spaced apart in a first direction on opposing sides of the first active section, the third electrode and / or the fourth electrode having a first protrusion extending on opposing sides of the first active section in a second direction perpendicular to the first direction and preventing light emitted from the light-emitting element from being irradiated onto the first active section.

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