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 to 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) display is one of the focuses of the current display research field. Compared with OLED display, Micro LED has the advantages of high reliability, low power consumption, high brightness, fast response, etc. In the production of Micro LED display, the full colorization of inorganic micro light emitting diode display 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 the present 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 as follows: 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 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 arranged 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.

[0005] In some embodiments, the black matrix layer and the light-emitting units are disposed directly 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, the black matrix layer and the light emitting units being disposed on a 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 unit, covers the light-emitting unit, 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, the first covering layer having 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 driving 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 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 to 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 a side surface 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 spaced apart in the first direction on opposing sides of the second active section, and the fifth electrode and / or the sixth electrode have second protrusions extending to opposing sides of the second active section in a second direction perpendicular to the first direction and preventing 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 close 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 the steps of: 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 element, the common electrode, and the signal wiring, the light-emitting element being located on a side of the quantum dot layer away from the substrate, and the first electrode and the second electrode being provided on a 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. Effect of the Invention

[0014] Beneficial effects In a display panel and a manufacturing method thereof 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 a light-emitting element, the light-emitting element includes 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 arranged to be offset from the driving elements, the common electrode, and the signal wirings, the light-emitting elements are located on a side of the quantum dot layer away from the substrate, and the first electrode and the second electrode are arranged on a side of the light-emitting layer opposite to the substrate, the light-emitting elements 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 elements, and the second hole extends to the driving circuit layer to expose the common electrode, the first electrode is electrically connected to the driving elements through the first hole, and the second electrode is electrically connected to the common electrode through the second hole. An embodiment of the present application provides a full-color display panel that emits light toward a 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 section of the driving transistor and / or the active section of the switching transistor, 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 description 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 describing 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 requiring creative efforts. [Figure 1] 1 is a structural schematic diagram of a display panel according to a first embodiment of the present invention; [Diagram 2]2 is a structural schematic diagram of a first embodiment of a driving transistor of the display panel shown in FIG. [Diagram 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. 4 is a structural schematic diagram of a display panel according to a second embodiment of the present invention. [Diagram 5] FIG. 11 is a structural schematic diagram of a display panel according to a third embodiment of the present invention. [Figure 6] FIG. 13 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. 13 is a structural schematic diagram of a display panel according to a fifth embodiment of the present invention. [Figure 9] FIG. 13 is a structural schematic diagram of a display panel according to a sixth embodiment of the present invention. [Figure 10] 4 is a flowchart of a method for manufacturing a display panel according to the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, the technical solutions in the embodiments of the present application will be clearly and completely described 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 are not all of the embodiments. Based on the embodiments of the present application, all other embodiments that a person skilled in the art can obtain without requiring creative efforts belong to the patent scope of the present application.

[0017] The terms "first", "second" and "third" in this application are used for descriptive purposes only and are not understood to indicate or imply a relative importance or number of technical features shown. Thus, a feature qualified as "first", "second" or "third" may explicitly or implicitly include at least one of the feature. In the description of this application, "multiple" means at least two, e.g., two, three, etc., unless otherwise expressly specified. All directional indications (e.g., up, down, left, right, front, back...) in the examples of this application are used only to describe the relative positional relationship, movement, etc. between each component in a certain position (as shown in the drawings), and when this specific position changes, the directional indication changes accordingly. Furthermore, the terms "including" and "having" and 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 unlisted steps or units, or may optionally include other steps or units 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 in this specification does not necessarily refer to the same embodiment, nor does it mean that the embodiment is a separate or alternative embodiment that is mutually exclusive with other embodiments. As will be understood by those skilled in the art, both explicitly and implicitly, the embodiments described herein may be combined with other embodiments.

[0019] The present invention will now be described in detail 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 of a first embodiment of the present application, 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 32a, a first electrode 32b, and a second electrode 32c. 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 the embodiment of the present application, the light emitting unit 30 is provided at a position offset from the driving element 21, the common electrode 22, and the signal wiring (not shown), so that the light emitting unit 30 can emit light toward one side of the substrate 10, and the driving circuit layer 20 does not have an effect such as blocking the light emitted by the light emitting unit 30. The light emitting element 32 in this embodiment is a micro light emitting diode, and in this embodiment, the micro light emitting diode is used to emit the first light. Specifically, the first electrode 32b of the micro light emitting diode is electrically connected to the driving element 21, and the second electrode 32c of the micro light emitting diode is electrically connected to the common electrode 22. In order to ensure the light emission and light emission efficiency of the light emitting element 32 of the display panel 100 in the embodiment of the present application to the substrate 10, in this embodiment, the area of ​​the quantum dot layer 31 close to the substrate 10 that extends between the substrates 10 is all made of a transparent material. In addition, the substrate 10 is 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 a specific embodiment of the present application, the display panel 100 is provided, thereby realizing full color display of the display panel 100.

[0023] Specifically, in the embodiment of the present application, 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 of the light emitting layer 32a opposite to the substrate 10, so that the light emitting element 32 emits light toward the quantum dot layer 31 and excites the quantum dot layer 31 to emit light. Furthermore, the black matrix layer 40 in the embodiment of the present application has a first hole 41 and a second hole 42, and 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, the driving circuit is generally electrically connected to the light emitting element and the pixel circuit by opening a via in the flat layer. However, according to actual needs, the flat layer usually needs to be thick, and the depth of the via opened in the flat layer is large, which makes it difficult to effectively deposit the conductive material in the via, and there is a risk of the problem that the conductive material is deposited too thick and causes a short circuit of the wiring between the electrodes. In the prior art, the flat layer is usually made of an inorganic insulating material that is difficult to deposit on the display panel 100, which also makes it difficult to deposit the flat layer. In addition, when providing a light emitting element such as a micro light emitting diode on the flat layer, it is necessary to open a groove in the flat layer, which also increases the difficulty of the process.

[0025] In this embodiment, the black matrix layer 40 and the light emitting units 30 are directly provided on the surface of the driving circuit layer 20 away from the substrate 10, which greatly shortens the manufacturing process of the display panel 100 and reduces the process difficulty of the display panel 100. The black matrix layer 40 acts as a flat layer in addition to the light blocking effect. Compared with the prior art, in this embodiment, the black matrix layer 40 and the light emitting units 30 are directly provided on the surface of the driving circuit layer 20 away from the substrate 10, and the black matrix layer 40 is provided with the first hole 41 and the second hole 42 for electrically connecting the light emitting element 32 and the driving circuit layer 20, which omits the flat layer or reduces the thickness of the flat layer. In addition, the thickness of the first hole 41 and the second hole 42 of the black matrix layer 40 in the embodiment of the present application is appropriate, and there is no problem 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 open 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 process difficulty.

[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 a third hole 43 exposing the first electrode 32b of the light-emitting element 32 and a fourth hole 44 exposing the second electrode 32c.

[0027] Specifically, the driving element 21 of this embodiment is a driving transistor, which 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, and 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 both 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 both opposing sides of the first active portion 21a in a second direction Y perpendicular to the first direction X and prevents light emitted from the light emitting element 32 from being irradiated to the first active portion 21a.

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

[0029] 3, both the third electrode 21c and the fourth electrode 21d of the drive transistor in this embodiment have a first protrusion 21e, and such a configuration effectively blocks light emitted from the light-emitting element 32 toward the substrate 10 and also prevents the light from being irradiated onto 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 provided with a shift in position, and their projections on the side surface of the first active unit 21a partially overlap, thereby completely blocking light from 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 remote 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 remote from the substrate 10. In this embodiment, the flat layer 50 is provided on the surface of the driving circuit layer 20 remote from the substrate 10, which makes it easier to improve the flatness of the surface of the driving circuit layer 20 and facilitates the arrangement of the black matrix layer 40 and the light emitting units 30 on the surface of the flat layer 50 remote 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 according to this embodiment is different from the display panel 100 according to the first embodiment in the following points. In this embodiment, the thickness of the black matrix layer 40 is equal to or less than the thickness of the light-emitting unit 30. In order to flatten the black matrix layer 40 and the light-emitting unit 30, the display panel 100 according to this embodiment further includes a first covering layer 60 covering the black matrix layer 40 and the light-emitting unit 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, and the first covering layer 60 has an excellent protective effect on 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 coating layer 60 is provided on the surfaces of the black matrix layer 40 and the light-emitting units 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 FIG. 6 and FIG. 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] As shown in FIG. 6, the display panel 100 according to this embodiment is different from the display panel 100 according to the first embodiment in the following points. The driving circuit layer 20 of the display panel 100 according to this embodiment further includes a switching transistor layer 23 provided on the side of the driving transistor away from the substrate 10 and including 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 driving transistor to control the driving 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 of the embodiment of the present application are provided on both 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 a second protrusion 231e that extends to both opposing sides of the second active portion 231a in the second direction Y perpendicular to the first direction X and prevents the light reflected by the third electrode 21c and the fourth electrode 21d of the driving transistor from being irradiated to the second active portion 231a. Specifically, both the fifth electrode 231c and the sixth electrode 231d of the embodiment have the second protrusion 231e, and this configuration effectively prevents the light reflected by the third electrode 21c and the fourth electrode 21d of the driving transistor from being irradiated to 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 surface 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 points. In this embodiment, the driving transistor uses a top gate structure, and the first gate 21b of the driving transistor is located on the side of the first active unit 21a away 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 closer to the substrate 10. In such a 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 the embodiment of the present application further includes a light absorbing layer 70 provided on a surface of the second active portion 231a of each switching transistor 231 close to the substrate 10, and further prevents light reflected by the third electrode 21c and the fourth electrode 21d of the driving transistor from being irradiated to the second active portion 231a.

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

[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 a 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, and the black matrix layer 40 is 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 shifted in position with respect to 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 to the substrate 10, so that the light-emitting element 32 emits light toward the quantum dot layer 31 and excites 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 extending to the driving circuit layer 20 to expose the driving element 21, and the second hole 42 extending to the driving circuit layer 20 to expose the common electrode 22. The first electrode 32b 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.

[0044] In this embodiment, the black matrix layer 40 is arranged in at least the following 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 coating layer 60 away from the substrate 10 . Holes in the form of a matrix are drilled in the black matrix layer 40, and the holes correspond to the light-emitting units 30 in one-to-one correspondence. 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 cover layer 60 remote from the substrate 10 . A plurality of quantum dot layers 31 are provided in the plurality of through holes of the black matrix layer 40, respectively, and further, a plurality of light emitting elements 32 are provided on the surfaces of the plurality of quantum dot layers 31 remote from the substrate 10, respectively.

[0047] In some embodiments according to the present application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the above-mentioned device embodiments are merely schematic, and the division of units is merely a division of logical functions, and in actual implementation, there may be other divisions, such as multiple units or components may be combined or integrated into another system, and some features may be ignored or not implemented. Also, 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 one processing unit, each unit may exist physically separately, or two or more units may be integrated into one 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 using the contents of the specification and drawings of the present application, or direct or indirect application to other related technical fields, are all within the patent protection scope of the present application. [Explanation of symbols]

[0050] 100 Display Panel 10 Substrate 20 Drive circuit layer 30 Light Emitting 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 1st Gate 21c 3rd electrode 21d 4th electrode 21e 1st protrusion 23 Switching transistor layer 231 Switching Transistor 231a 2nd 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 provided 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; a first electrode and a second electrode disposed on a side of the light-emitting layer opposite the substrate, the first electrode and the second electrode being disposed on a 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 extending to the drive circuit layer to expose the drive element, and the second hole extending to the drive circuit layer to expose the common electrode; the first electrode is electrically connected to the drive element via the first hole, and the second electrode is electrically connected to the common electrode via the second hole.

2. 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 2. The display panel of 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. The driving element is a drive transistor disposed on one side of the substrate; 2. The display panel of claim 1, wherein 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 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 to the first active section.

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

6. 5. The display panel of claim 4, 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 closer to the substrate.

7. 7. The display panel of claim 6, 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 a second protrusion extending to opposing sides of the second active section in a second direction perpendicular to the first direction, and preventing light reflected by the third electrode and the fourth electrode from being irradiated onto the second active section.

8. The display panel of claim 6 , 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.

9. The display panel according to claim 6 , further comprising a light absorbing layer provided on a surface of each of the second active sections that is closer to the substrate.

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

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

12. The display panel according to claim 1 , wherein a transparent material is used for all of the areas of the quantum dot layer that are close to the substrates and extend between the substrates.

13. 12. The display panel of claim 1, 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 transmits the first light to a second light emitted from the quantum dot layer.

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

15. The display panel according to claim 4 , wherein the driving transistor has a top gate structure.

16. The display panel according to claim 6 , wherein the switching transistor has a bottom gate structure.

17. A method for manufacturing a display panel, comprising the steps of: 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 is 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 to be 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, and the first electrode and the second electrode are provided on a 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.

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