Patent Publication Number: US-2022223775-A1

Title: Driving backplane for display and method of manufacturing the same, display panel, and display apparatus

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a national phase entry under 35 USC 371 of International Patent Application No. PCT/CN2020/126525, filed on Nov. 4, 2020, which claims priority to Chinese Patent Application No. 201911150726.2, filed on Nov. 21, 2019, which are incorporated herein by reference in their entirety. 
    
    
     TECHNICAL FIELD 
     The present disclosure relates to the field of display technologies, and in particular, to a driving backplane for display and a method of manufacturing the same, a display panel and a display apparatus. 
     BACKGROUND 
     Mini light-emitting diodes (Mini LEDs) display apparatuses are new display apparatuses using light-emitting diodes (LEDs) with a size in a range of 100 μm to 200 μm, and micro light-emitting diodes (Micro LEDs) display apparatuses are new display apparatuses using LEDs with a size of approximately dozens of micrometers. In the Mini LED display apparatus and the Micro LED display apparatus, each LED can be individually addressed and driven to emit light, and thus the Mini LED display apparatus and the Micro LED display apparatus have advantages of high efficiency, high brightness, high reliability and high response speed. In addition, the Mini LED display apparatus and the Micro LED display apparatus do not need a backlight module, and thus have advantages of small size, light weight and small thinness, and low power consumption. Therefore, the Mini LED display apparatus and the Micro LED display apparatus are becoming hot topics of research in the current display technology field. 
     SUMMARY 
     In an aspect, a method of manufacturing a driving backplane for display is provided. The method includes: forming a first conductive pattern layer on a base, the first conductive pattern layer including a plurality of first conductive lines; and forming a second conductive pattern layer on a side of the first conductive pattern layer away from the base, the second conductive pattern layer including a plurality of electrode groups and a plurality of second conductive lines. The plurality of first conductive lines and the plurality of second conductive lines cross and are insulated from each other. An electrode group of the plurality of electrode groups includes a first electrode and a second electrode, and the second electrode is electrically connected to a corresponding second conductive line. Orthogonal projections, on the base, of the first electrode and a corresponding first conductive line have an overlapping region, and a portion of the first electrode, whose orthogonal projection on the base is located in the overlapping region, is in contact with a portion of the first conductive line, whose orthogonal projection on the base is located in the overlapping region. 
     In some embodiments, forming the first conductive pattern layer on the base includes: forming a first seed film on the base; patterning the first seed film to obtain a seed pattern layer including a plurality of first conductive sub-lines; forming a first insulating layer on the base on which the seed pattern layer has been formed, the first insulating layer including a plurality of first hollow-out portions, an orthogonal projection, on the base, of each first hollow-out portion being located within an orthogonal projection, on the base, of a corresponding first conductive sub-line; and forming a first electroplated metal layer on a surface of the seed pattern layer away from the base and in the plurality of first hollow-out portions. The first electroplated metal layer including a plurality of second conductive sub-lines, and a second conductive sub-line and a first conductive sub-line in contact therewith constitute the first conductive line. 
     In some embodiments, forming the first insulating layer on the base on which the seed pattern layer has been formed includes: forming a first insulating sub-film on the base on which the seed pattern layer has been formed, a material of the first insulating sub-film including an inorganic material; forming a second insulating sub-film on a surface of the first insulating sub-film away from the base, a material of the second insulating sub-film including an organic material; and patterning the second insulating sub-film and the first insulating sub-film to obtain the first insulating layer. 
     In some embodiments, forming the second conductive pattern layer on the side of the first conductive pattern layer away from the base includes: forming a second seed film on the base on which the first electroplated metal layer has been formed; forming a second insulating layer on a surface of the second seed film away from the base, the second insulating layer including a plurality of second hollow-out portions, a plurality of third hollow-out portions and a plurality of fourth hollow-out portions, the plurality of second hollow-out portions being located in regions where a plurality of first electrodes are to be formed, the plurality of third hollow-out portions being located in regions where a plurality of second electrodes are to be formed, the plurality of fourth hollow-out portions being located in regions where the plurality of second conductive lines are to be formed; forming a second electroplated metal layer on the surface of the second seed film away from the base and in the plurality of the second hollow-out portions, the plurality of third hollow-out portions and the plurality of fourth hollow-out portions; and removing the second insulating layer and portions of the second seed film that overlap with the second insulating layer, so that the second electroplated metal layer and remaining portions of the second seed film form the plurality of first electrodes in regions where portions of the second electroplated metal layer formed in the plurality of second hollow-out portions are located, the plurality of second electrodes in regions where portions of the second electroplated metal layer formed in the plurality of third hollow-out portions are located, and the plurality of second conductive lines in regions where portions of the second electroplated metal layer formed in the plurality of fourth hollow-out portions are located. 
     In some embodiments, before the second seed film is formed, the method further includes forming a first planarization layer on the base on which the first electroplated metal layer has been formed. The first planarization layer includes a plurality of fifth hollow-out portions, and an orthogonal projection, on the base, of each fifth hollow-out portion overlaps with an orthogonal projection, on the base, of a second hollow-out portion. 
     In some embodiments, forming the second seed film on the base on which the first electroplated metal layer has been formed includes: forming the second seed film on the base on which the first planarization layer has been formed. 
     In some embodiments, the method further includes: forming a second planarization layer, a passivation layer and a third planarization layer sequentially on the base on which the second conductive pattern layer has been formed; forming a metal film on a side of the base away from the third planarization layer; patterning the metal film to form a plurality of first bonding electrodes and a plurality of second bonding electrodes; forming a plurality of first connection lines and a plurality of second connection lines on side faces of the base, each first connection line extending to positions of a corresponding first conductive line and a corresponding first bonding electrode from a side face of the base and being electrically connected to the first conductive line and the first bonding electrode, each second connection line extending to positions of a corresponding second conductive line and a corresponding second bonding electrode from a side face of the base and being electrically connected to the second conductive line and the second bonding electrode; and patterning at least the passivation layer and the third planarization layer to expose the first electrode and the second electrode. 
     In some embodiments, the second conductive pattern layer further includes a plurality of connection electrodes. An edge portion of the first conductive line in a length direction thereof is electrically connected to a connection electrode, and the first connection line extends from a side face of the first conductive line to a side face of the connection electrode that is electrically connected to the first conductive line. 
     In some embodiments, the method further includes: forming a protective layer at least on the side faces of the base on which the plurality of first connection lines and the plurality of second connection lines have been formed. The protective layer covers the plurality of first connection lines and the plurality of second connection lines. 
     In some embodiments, forming the plurality of first connection lines and the plurality of second connection lines on the side faces of the base includes: forming the plurality of first connection lines and the plurality of second connection lines on the side faces of the base through any one of a pad printing, a three-dimension (3D) printing, a patterning process or a laser cutting. 
     In some embodiments, the driving backplane for display has a plurality of sub-pixel regions, and at least one electrode group is disposed in a sub-pixel region. The plurality of first conductive lines extend in a row direction of the plurality of sub-pixel regions, and the plurality of second conductive lines extend in a column direction of the plurality of sub-pixel regions. All first electrodes in a row of sub-pixel regions are electrically connected to at least two first conductive lines, and different first conductive lines are electrically connected to different first electrodes. All second electrodes in a column of sub-pixel regions are electrically connected to at least one second conductive line. 
     In some embodiments, at least one sub-pixel region is provided with two electrode groups, and the two electrode groups are a first electrode group and a second electrode group. 
     In some embodiments, a first electrode in the first electrode group and a first electrode in the second electrode group are electrically connected to a same first conductive line. A second electrode in the first electrode group and a second electrode in the second electrode group are electrically connected to a same second conductive line. 
     In some embodiments, a first electrode in the first electrode group and a first electrode in the second electrode group are electrically connected to a same first conductive line. A second electrode in the first electrode group and a second electrode in the second electrode group are electrically connected to two different second conductive lines. 
     In some embodiments, a first electrode in the first electrode group and a first electrode in the second electrode group are electrically connected to two different first conductive lines. A second electrode in the first electrode group and a second electrode in the second electrode group are electrically connected to a same second conductive line. 
     In some embodiments, a width of the first conductive line in a direction perpendicular to a direction in which the first conductive line extends is greater than a width of the second conductive line in a direction perpendicular to a direction in which the second conductive line extends. 
     In another aspect, a driving backplane for display is provided. The driving backplane for display is manufactured through the method of manufacturing the driving backplane for display as described above. The driving backplane for display includes: the base; the first conductive pattern layer disposed on the base, the first conductive pattern layer including the plurality of first conductive lines; and the second conductive pattern layer disposed on the side of the first conductive pattern layer away from the base. The second conductive pattern layer includes the plurality of electrode groups and the plurality of second conductive lines. The plurality of first conductive lines and the plurality of second conductive lines cross and are insulated from each other. The electrode group of the plurality of electrode groups includes the first electrode and the second electrode, and the second electrode is electrically connected to the corresponding second conductive line. The orthogonal projections, on the base, of the first electrode and the corresponding first conductive line have the overlapping region, and the portion of the first electrode, whose orthogonal projection on the base is located in the overlapping region, is in contact with the portion of the first conductive line, whose orthogonal projection on the base is located in the overlapping region. 
     In yet another aspect, a display panel is provided. The display panel includes the driving backplane for display and a plurality of light-emitting devices. The driving backplane for display has a plurality of sub-pixel regions, and the plurality of light-emitting devices are disposed in the plurality of sub-pixel regions. One light-emitting device in each sub-pixel region is configured to emit light. Each light-emitting device that is configured to emit light is electrically connected to the first electrode and the second electrode in a same electrode group disposed in the sub-pixel region. 
     In some embodiments, a positive electrode and a negative electrode of the light-emitting device that is configured to emit light are electrically connected to the first electrode and the second electrode in the electrode group. 
     In yet another aspect, a display apparatus is provided. The display apparatus includes a display screen, and the display screen is tiled by a plurality of display panels as described above. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In order to describe technical solutions in the present disclosure more clearly, accompanying drawings to be used in some embodiments of the present disclosure will be introduced briefly below. Obviously, the accompanying drawings to be described below are merely accompanying drawings of some embodiments of the present disclosure, and a person of ordinary skill in the art can obtain other drawings according to these drawings. In addition, the accompanying drawings to be described below may be regarded as schematic diagrams, but are not limitations on actual sizes of products, actual processes of methods and actual timings of signals involved in the embodiments of the present disclosure. 
         FIG. 1  is a flow diagram showing a method of manufacturing a driving backplane for display, in accordance with some embodiments; 
         FIG. 2  is a top view showing a structure of a driving backplane for display, in accordance with some embodiments; 
         FIG. 3A  is a sectional view showing a structure of the driving backplane for display in  FIG. 2  taken along the direction A-A′; 
         FIG. 3B  is a sectional view showing a structure of the driving backplane for display in  FIG. 2  taken along the direction B-B′; 
         FIG. 3C  is a sectional view showing a structure of the driving backplane for display in  FIG. 2  taken along the direction C-C′, 
         FIG. 4  is a manufacturing process diagram of a first conductive pattern layer, in accordance with some embodiments; 
         FIG. 5  is another manufacturing process diagram of a first conductive pattern layer, in accordance with some embodiments; 
         FIG. 6  is a manufacturing process diagram of a second conductive pattern layer, in accordance with some embodiments; 
         FIG. 7  is a manufacturing process diagram of a first planarization layer and a second seed film, in accordance with some embodiments; 
         FIG. 8A  is a manufacturing process diagram of a second planarization layer, a passivation layer and a third planarization layer, in accordance with some embodiments; 
         FIG. 8B  is a manufacturing process diagram of a first bonding electrode and a second bonding electrode, in accordance with some embodiments; 
         FIG. 8C  is a manufacturing process diagram of a first connection line and a second connection line, in accordance with some embodiments; 
         FIG. 8D  is a diagram showing a structure obtained after the passivation layer and the third planarization layer are patterned, in accordance with some embodiments; 
         FIG. 8E  is a diagram showing another structure obtained after the second planarization layer, the passivation layer and the third planarization layer are patterned, in accordance with some embodiments; 
         FIG. 9A  is a top view showing a structure of another driving backplane for display, in accordance with some embodiments; 
         FIG. 9B  is a sectional view showing a structure of the driving backplane for display in  FIG. 9A  taken along the direction D-D′; 
         FIG. 10A  is a sectional view showing a structure of yet another driving backplane for display, in accordance with some embodiments; 
         FIG. 10B  is a sectional view showing a structure of yet another driving backplane for display, in accordance with some embodiments; 
         FIG. 11  is a distribution diagram of sub-pixel regions of a driving backplane for display, in accordance with some embodiments; 
         FIG. 12A  is a top view showing a structure of yet another driving backplane for display, in accordance with some embodiments; 
         FIG. 12B  is a top view showing a structure of yet another driving backplane for display, in accordance with some embodiments; 
         FIG. 12C  is a top view showing a structure of yet another driving backplane for display, in accordance with some embodiments; 
         FIG. 12D  is a top view showing a structure of yet another driving backplane for display, in accordance with some embodiments; 
         FIG. 12E  is a top view showing a structure of yet another driving backplane for display, in accordance with some embodiments; 
         FIG. 13  is a top view showing a structure of a display panel, in accordance with some embodiments; 
         FIG. 14A  is a top view showing a structure of a display apparatus, in accordance with some embodiments; and 
         FIG. 14B  is a sectional view showing a structure of the display apparatus in  FIG. 14A  taken along the direction E-E′. 
     
    
    
     DETAILED DESCRIPTION 
     Technical solutions in some embodiments of the present disclosure will be described clearly and completely below with reference to the accompanying drawings. Obviously, the described embodiments are merely some but not all embodiments of the present disclosure. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure shall be included in the protection scope of the present disclosure. 
     Unless the context requires otherwise, the term “comprise” and other forms thereof such as the third-person singular form “comprises” and the present participle form “comprising” throughout the description and the claims are construed as an open and inclusive meaning, i.e., “including, but not limited to”. In the description, the terms such as “one embodiment”, “some embodiments”, “exemplary embodiments”, “example”, “specific example” or “some examples” are intended to indicate that specific features, structures, materials or characteristics related to the embodiment(s) or example(s) are included in at least one embodiment or example of the present disclosure. Schematic representations of the above terms do not necessarily refer to the same embodiment(s) or example(s). In addition, the specific features, structures, materials, or characteristics may be included in any one or more embodiments or examples in any suitable manner. 
     Hereinafter, the terms “first” and “second” are used for descriptive purposes only, and are not to be construed as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined with “first” or “second” may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, the term “a plurality of”/the plurality of means two or more unless otherwise specified. 
     In the description of some embodiments, the term “connected” and its derivatives may be used. For example, the term “connected” may be used in the description of some embodiments to indicate that two or more components are in direct or indirect contact with each other. The embodiments disclosed herein are not necessarily limited to the contents herein. 
     The use of “configured to” herein indicates an open and inclusive meaning, which does not exclude devices that are applicable to or configured to perform additional tasks or steps. 
     Exemplary embodiments are described herein with reference to sectional views and/or plan views as idealized exemplary drawings. In the accompanying drawings, thicknesses of layers and sizes of regions are enlarged for clarity. Therefore, the exemplary embodiments should not be construed to be limited to shapes of regions shown herein, but to include deviations in the shapes due to, for example, manufacturing. In addition, the regions shown in the accompanying drawings are schematic in nature, and their shapes are not intended to show actual shapes of the regions in a device, and are not intended to limit the scope of the exemplary embodiments. 
     As shown in  FIG. 1 , some embodiments of the present disclosure provide a method of manufacturing a driving backplane  1  for display, and the method includes steps  10  and  20  (S 10  and S 20 ). 
     In S 10 , as shown in  FIGS. 2 to 3C , a first conductive pattern layer  11  is formed on a base  10 , and the first conductive pattern layer  11  includes a plurality of first conductive lines  15 . 
     A material of the base  10  is not limited in the embodiments of the present disclosure. For example, the base  10  is a glass base or a silicon base. 
     In S 20 , as shown in  FIGS. 2 to 3C , a second conductive pattern layer  12  is formed on a side of the first conductive pattern layer  11  away from the base  10 , and the second conductive pattern layer  12  includes a plurality of electrode groups and a plurality of second conductive lines  16 . The plurality of first conductive lines  15  and the plurality of second conductive lines  16  cross and are insulated from each other. 
     An electrode group of the plurality of electrode groups includes a first electrode  13  and a second electrode  14 . The second electrode  14  is electrically connected to a corresponding second conductive line  16 . Orthogonal projections, on the base  10 , of the first electrode  13  and a corresponding first conductive line  15  have an overlapping region, and a portion of the first electrode  13 , whose orthogonal projection on the base  10  is located in the overlapping region, is in contact with a portion of the first conductive line  15 , whose orthogonal projection on the base  10  is located in the overlapping region. For example, each of the plurality of electrode groups includes a first electrode  13  and a second electrode  14 , and the second electrode  14  in each electrode group is electrically connected to a corresponding second conductive line  16 . Orthogonal projections, on the base  10 , of the first electrode  13  in the electrode group and a corresponding first conductive line  15  have an overlapping region, and a portion of the first electrode  13 , whose orthogonal projection on the base  10  is located in the overlapping region, is in contact with a portion of the first conductive line  15 , whose orthogonal projection on the base  10  is located in the overlapping region. 
     Any second conductive line  16  may be electrically connected to the second electrode  14  in one electrode group, or may be electrically connected to each second electrode  14  in part of the plurality of electrode groups. Similarly, any first conductive line  15  may be electrically connected to the first electrode  13  in one electrode group, or may be electrically connected to each first electrode  13  in part of the plurality of electrode groups. In addition, the first electrode  13  and the second electrode  14  in the electrode group are insulated from each other. 
     In the embodiments of the present disclosure, the expression “the second conductive pattern layer  12  including the plurality of electrode groups and the plurality of second conductive lines  16 ” means that all first electrodes  13  and all second electrodes  14  in the plurality of electrode groups, and the plurality of second conductive lines  16  are arranged in the same layer. All first electrodes  13  and all second electrodes  14  in the plurality of electrode groups, and the plurality of second conductive lines  16  are formed synchronously in the manufacturing process, so that each second conductive line  16  and the second electrode  14  electrically connected thereto are connected to form a one-piece structure. 
     For example, the first electrode  13  in the electrode group is configured to be electrically connected to a positive electrode of a light-emitting device, and the second electrode  14  in the electrode group is configured to be electrically connected to a negative electrode of the light-emitting device. In this way, the first electrode  13  and the second electrode  14  respectively receive signals from the first conductive line  15  and the second conductive line  16 , so as to drive the light-emitting device to emit light. For another example, the first electrode  13  in the electrode group is configured to be electrically connected to a negative electrode of a light-emitting device, and the second electrode  14  in the electrode group is configured to be electrically connected to a positive electrode of the light-emitting device. In this way, the first electrode  13  and the second electrode  14  respectively receive signals from the first conductive line  15  and the second conductive line  16 , so as to drive the light-emitting device to emit light. 
     In the method of manufacturing the driving backplane  1  for display provided in the embodiments of the present disclosure, the plurality of first conductive lines  15  are formed first, and then the plurality of electrode groups and the plurality of second conductive lines  16  that are arranged in the same layer are formed on a side of the plurality of first conductive lines  15  away from the base  10 . In this way, the first electrodes  13  and the second electrodes  14  of the electrode groups are located in the same layer, and thus it is convenient for positive electrodes and negative electrodes of light-emitting devices to be bonded to the first electrodes  13  and the second electrodes  14 , thereby reducing a bonding difficulty of the light-emitting devices, and improving a bonding yield of the light-emitting devices. 
     In some embodiments, as shown in  FIG. 4 , S 10  includes steps  101  to  104  (S 101  to S 104 ). 
     In S 101 , as shown in part (A) in  FIG. 4 , a first seed film  120  is formed on the base  10 . 
     In some examples, the first seed film  120  is formed through a magnetron sputtering process. In some examples, a material of the first seed film  120  includes metal, such as copper (Cu) or silver (Ag). 
     In S 102 , as shown in part (B) in  FIG. 4 , the first seed film  120  is patterned to obtain a seed pattern layer  121  including a plurality of first conductive sub-lines  151 . 
     In some examples, a thickness of the seed pattern layer  121  is in a range of 3000 Å to 5000 Å. 
     The first seed film  120  may be patterned through a patterning process. Here, the patterning process includes an exposure process, a development process, an etching process and a stripping process. That is, photoresist is coated on a surface of the first seed film  120  away from the base  10  first; then, the photoresist is exposed and developed to obtain a photoresist remaining portion, and the photoresist remaining portion is located in a region where the seed pattern layer  121  is to be formed; subsequently, a portion of the first seed film  120  that is not covered by the photoresist remaining portion is removed through the etching process, so that a remaining part of the first seed film  120  forms the seed pattern layer  121  including the plurality of first conductive sub-lines  151 ; and at last, the photoresist remaining portion is stripped off. 
     In S 103 , as shown in part (C) in  FIG. 4 , a first insulating layer  130  is formed on the base  10  on which the seed pattern layer  121  has been formed. The first insulating layer  130  includes a plurality of first hollow-out portions  131 , and an orthogonal projection, on the base  10 , of each first hollow-out portion  131  is located within an orthogonal projection, on the base  10 , of a corresponding first conductive sub-line  151 . 
     In some examples, the orthogonal projection, on the base  10 , of each first hollow-out portion  131  completely overlaps with the orthogonal projection, on the base  10 , of the corresponding first conductive sub-line  151 . In some other examples, an edge, which extends in a width direction of the first conductive sub-line  151 , of the orthogonal projection of each first hollow-out portion  131  on the base  10  is flush with an edge, which extends in the width direction of the first conductive sub-line  151 , of the orthogonal projection of the corresponding first conductive sub-line  151  on the base  10 . An edge, which extends in a length direction of the first conductive sub-line  151 , of the orthogonal projection of the first conductive sub-line  151  corresponding to each first hollow-out portion  131  on the base  10  exceeds an edge, which extends in the length direction of the first conductive sub-line  151 , of the orthogonal projection of the first hollow-out portion  131  on the base  10 . The length direction of the first conductive sub-line  151  is a direction in which the first conductive sub-line  151  extends. 
     The first hollow-out portion  131  penetrates through the first insulating layer  130 , so that a portion, located below the hollow-out portion  131 , of a surface of the first conductive sub-line  151  away from the base  10  is exposed and is not covered by the first insulating layer  130 . 
     The first insulating layer  130  may be of a single-layer structure, or may be of a multi-layer stacked structure, which is not limited in the embodiments of the present disclosure. 
     In some examples, as shown in part (C) in  FIG. 4 , the first insulating layer  130  is of the single-layer structure. In this case, for example, the first insulating layer  130  is made of photosensitive polyimide (PI) or a resin material. In some other examples, the first insulating layer  130  is of the multi-layer stacked structure, and based on this, as shown in  FIG. 5 , S 103  includes steps  1031  to  1033  (S 1031  to S 1033 ). 
     In S 1031 , as shown in part (A) in  FIG. 5 , a first insulating sub-film  132  is formed on the base  10  on which the seed pattern layer  121  has been formed. A material of the first insulating sub-film  132  includes an inorganic material. For example, the inorganic material is silicon nitride (SiN). 
     The first insulating sub-film  132  covers the formed first conductive sub-lines  151 . 
     In S 1032 , as shown in part (B) in  FIG. 5 , a second insulating sub-film  133  is formed on a surface of the first insulating sub-film  132  away from the base  10 . A material of the second insulating sub-film  133  includes an organic material. For example, the organic material is one of PI and a resin material. In a process of forming the second insulating sub-film  133 , the first insulating sub-film  132  protects the first conductive sub-lines  151 . For example, when the second insulating sub-film  133  needs to be dried during the formation process, the first insulating sub-film  132  prevents oxygen and nitrogen in the drying environment from directly contacting with the first conductive sub-lines  151 , so as to prevent the first conductive sub-lines  151  from being oxidized or nitrided, thereby ensuring the performance of the first conductive sub-lines  151 . 
     In S 1033 , as shown in part (C) in  FIG. 5 , the second insulating sub-film  133  and the first insulating sub-film  132  are patterned to obtain the first insulating layer  130 . 
     A portion of the second insulating sub-film  133  and a portion of the first insulating sub-film  132  that are located in a region where each first hollow-out portion  131  is to be formed are sequentially etched through the patterning process, so that the plurality of first hollow-out portions  131  are formed. 
     That is to say, the first insulating layer  130  includes a first insulating sub-layer and a second insulating sub-layer that are sequentially stacked in a thickness direction of the base  10 , the first insulating sub-layer includes the inorganic material, and the second insulating sub-layer includes the organic material. The first insulating sub-layer and the second insulating sub-layer are obtained by patterning the first insulating sub-film  132  and the second insulating sub-film  133 , respectively. Based on this, the first hollow-out portions  131  are located in the first insulating sub-layer and the second insulating sub-layer, and penetrate through the first insulating sub-layer and the second insulating sub-layer. 
     In S 104 , as shown in part (D) in  FIG. 4 , a first electroplated metal layer  140  is formed on a surface of the seed pattern layer  121  away from the base  10  and in the first hollow-out portions  131 . That is, the first electroplated metal layer  140  is formed only in the regions where the seed pattern layer  121  is exposed by the first insulating layer  130 . The first electroplated metal layer  140  includes a plurality of second conductive sub-lines  152 , and each second conductive sub-line  152  and a first conductive sub-line  151  in contact therewith constitute the first conductive line  15 . 
     The number of the second conductive sub-lines  152 , the number of the first conductive sub-lines  151  and the number of the first hollow-out portions  131  are equal, and directions in which the first conductive sub-line  151 , the first hollow-out portion  131  and the second conductive sub-line  152  extend are the same. That is, one first conductive line  15  composed of the first conductive sub-line  151  and the second conductive sub-line  152  that are in contact with each other is formed in a region where each hollow-out portion  131  is located. 
     It will be noted that,  FIG. 4  illustrates a formation process of three first conductive lines  15 , but the number of the first conductive lines  15  is not limited to three in the embodiments of the present disclosure. 
     The first electroplated metal layer  140  is formed through an electroplating process. In the electroplating process, the seed pattern layer  121  is used as a electroplating electrode to be connected to an external power supply, so that a metal material may grow on the seed pattern layer  121  to form the first electroplated metal layer  140 . The first electroplated metal layer  140  with a large thickness may be fabricated through the electroplating process, so that an overall thickness of the first conductive line  15  composed of the second conductive sub-line  152  and the first conductive sub-line  151  may be increased; as a result, a resistance of the first conductive line  15  may be reduced, which is conducive to reducing a voltage drop and a power consumption. 
     In some examples, the thickness of the first electroplated metal layer  140  is in a range of 5 μm to 20 μm. 
     In some examples, the seed pattern layer  121  and the first electroplated metal layer  140  are made of the same material such as one of Cu or Ag. Of course, the seed pattern layer  121  and the first electroplated metal layer  140  may be made of different materials. 
     It will be noted that, in a case where the first conductive sub-line  151  and the second conductive sub-line  152  are made of the same material (e.g., Cu), there is no contact interface between the first conductive sub-line  151  and the second conductive sub-line  152  in a sectional view of the first conductive line  15 . In a case where the first conductive sub-line  151  and the second conductive sub-line  152  are made of different materials (e.g., one of the first conductive sub-line  151  and the second conductive sub-line  152  is made of Cu, and the other is made of Ag), there may be a contact interface between the first conductive sub-line  151  and the second conductive sub-line  152  in the sectional view (e.g.,  FIGS. 3A, 3B, 3C and 4 ) of the first conductive line  15 . 
       FIGS. 3A, 3B, 3C and 4  only clearly illustrate positions and structures of the first conductive sub-line  151  and the second conductive sub-line  152 , and do not represent the materials of the first conductive sub-line  151  and the second conductive sub-line  152 . Whether the first conductive sub-line  151  and the second conductive sub-line  152  are made of the same material is not limited in the embodiments of the present disclosure. 
     In some embodiments, as shown in  FIG. 6 , S 20  includes steps  201  to  204  (S 201  to S 204 ). It will be noted that, for convenience of description,  FIG. 6  is a schematic diagram showing a process of forming a portion of the structure in  FIG. 3C . 
     In S 201 , as shown in part (A) in  FIG. 6 , a second seed film  150  is formed on the base  10  on which the first electroplated metal layer  140  has been formed. 
     In order to achieve electrical connection between the first conductive lines  15  and the first electrodes  13  to be formed, the second seed film  150  is in contact with portions of the first conductive lines  15  in regions where the first conductive lines  15  and the first electrodes  13  to be formed are in contact. 
     In some examples, the second seed film  150  is formed through a magnetron sputtering process. 
     In some examples, a material of the second seed film  150  includes metal, such as Cu or Ag. 
     In S 202 , as shown in part (B) in  FIG. 6 , a second insulating layer  160  is formed on a surface of the second seed film  150  away from the base  10 . The second insulating layer  160  includes a plurality of second hollow-out portions  161 , a plurality of third hollow-out portions  162  and a plurality of fourth hollow-out portions  163 . The plurality of second hollow-out portions  161  are located in regions where the first electrodes  13  are to be formed, the plurality of third hollow-out portions  162  are located in regions where the second electrodes  14  are to be formed, and the plurality of fourth hollow-out portions  163  are located in regions where the plurality of second conductive lines  16  are to be formed. 
     The number of the second hollow-out portions  161  is the same as the number of the first electrodes  13 , and each second hollow-out portion  161  is located in a region where one first electrode  13  is to be formed, so that the first electrode  13  is formed in the second hollow-out portion  161 . The number of the third hollow-out portions  162  is the same as the number of the second electrodes  14 , and each third hollow-out portion  162  is located in a region where one second electrode  14  is to be formed, so that the second electrode  14  is formed in the third hollow-out portion  162 . The number of the fourth hollow-out portions  163  is the same as the number of the second conductive lines  16 , and each fourth hollow-out  163  is located in a region where one second conductive line  16  is to be formed, so that the second conductive line  16  is formed in the fourth hollow-out portion  163 . 
     The second hollow-out portions  161 , the third hollow-out portions  162  and the fourth hollow-out portions  163  all penetrate through the second insulating layer  160 . 
     In some examples, the second insulating layer  160  is made of an organic photosensitive material. For example, the second insulating layer  160  is made of a photoresist. In a process of forming the second insulating layer  160 , through a photolithography process, the second hollow-out portions  161 , the third hollow-out portions  162  and the fourth hollow-out portions  163  are respectively formed in the regions where the first electrodes  13  are to be formed, the regions where the second electrodes  14  are to be formed and the regions where the second conductive lines  16  are to be formed. The photolithography process includes an exposure process and a development process. For example, a photoresist layer is formed on the second seed film  150  by coating, and then the photoresist layer is patterned through the exposure process and the development process, so as to form the second insulating layer  160  including the second hollow-out portions  161 , the third hollow-out portions  162  and the fourth hollow-out portions  163 . 
     In S 203 , as shown in part (C) in  FIG. 6 , a second electroplated metal layer  170  is formed on a surface of the second seed film  150  away from the base  10  and in the second hollow-out portions  161 , the third hollow-out portions  162  and the fourth hollow-out portions  163 . 
     After the second electroplated metal layer  170  is formed, the second electroplated metal layer  170  is only located in the regions where the second seed film  150  is exposed by the second insulating layer  160 , and a portion of the second electroplated metal layer  170  that is located in the second hollow-out portion  161  is in direct contact with the second conductive sub-line  152  of the first conductive line  15 . 
     The second electroplated metal layer  170  is formed through an electroplating process. The second electroplated metal layer  170  with a large thickness may be fabricated through the electroplating process, so that the first electrode  13 , the second electrode  14  and the second conductive line  16  that are subsequently formed have a large thickness. 
     In S 204 , as shown in part (D) in  FIG. 6 , the second insulating layer  160  and portions of the second seed film  150  that overlap with the second insulating layer  160  are removed, so that the second electroplated metal layer  170  and remaining portions of the second seed film  150  (which constitute a second seed layer) form the first electrodes  13  in regions where portions of the second electroplated metal layer  170  formed in the second hollow-out portions  161  are located, the second electrodes  14  in regions where portions of the second electroplated metal layer  170  formed in the third hollow-out portions  162  are located, and the second conductive lines  16  in regions where portions of the second electroplated metal layer  170  formed in the fourth hollow-out portions  163  are located. 
     That is, the second insulating layer  160  and portions, whose orthogonal projections on the base  10  overlap with an orthogonal projection of the second insulating layer  160  on the base  10 , of the second seed film  150  are removed, so that the second electroplated metal layer  170  and the remaining portions of the second seed film  150  form one first electrode  13  in the region where the portion of the second electroplated metal layer  170  formed in each second hollow-out portion  161  is located, form one second electrode  14  in the region where the portion of the second electroplated metal layer  170  formed in each third hollow-out portion  162  is located, and form one second conductive line  16  in the region where the portion of the second electroplated metal layer  170  formed in each fourth hollow-out portion  163  is located. 
     Correspondingly, the first electrode  13 , the second electrode  14  and the second conductive line  16  are each of a double-layer structure. In the double-layer structure of the first electrode  13 , a layer away from the base  10  is the portion of the second electroplated metal layer  170  formed in the second hollow-out portion  161 , and another layer proximate to the base  10  is a remaining portion of the second seed film  150  that overlaps with the portion of the second electroplated metal layer  170  formed in the second hollow-out portion  161 . In a double-layer structure of the second electrode  14 , a layer away from the base  10  is the portion of the second electroplated metal layer  170  formed in the third hollow-out portion  162 , and another layer proximate to the base  10  is a remaining portion of the second seed film  150  that overlaps with the portion of the second electroplated metal layer  170  formed in the third hollow-out portion  162 ; in a double-layer structure of the second conductive line  16 , a layer away from the base  10  is the portion of the second electroplated metal layer  170  formed in the fourth hollow-out portion  163 , and a layer proximate to the base  10  is a remaining portion of the second seed film  150  that overlaps with the portion of the second electroplated metal layer  170  formed in the fourth hollow-out portion  163 . 
     In some examples, the second insulating layer  160  may be removed through an etching process. In some examples, the portions of the second seed film  150  that overlap with the second insulating layer  160  may be removed through any one of an etching process or a laser cutting. 
     In some examples, the portions of the second seed film  150  that overlap with the second insulating layer  160  are removed through a wet etching process. The wet etching process refers to etching the second seed film  150  through an etching solution. In a case where the second seed film  150  is made of Cu, the etching solution may be, for example, hydrogen peroxide. 
     In the processes of S 201  to S 204 , after the second insulating layer  160  is removed, the second electroplated metal layer  170  may be used as a mask to etch the second seed film  150 , so that the portions of the second seed film  150  that overlap with the second insulating layer  160  are removed to form the second seed layer. Therefore, there is no need to use an additional mask in the process of forming the second seed layer, which reduces the production cost. 
     It will be noted that, although it is possible to cause a portion of the second electroplated metal layer  170  to be etched in a process of using the second electroplated metal layer  170  as a mask to etch the second seed film  150 , since a thickness of the second electroplated metal layer  170  is much greater than a thickness of the second seed film  150 , a thickness of this portion that is lost can be negligible. 
     In a case where the second seed layer is formed synchronously through a patterning process when the second seed film  150  is formed, and then the second insulating layer  160  and the second electroplated metal layer  170  are sequentially formed, an additional mask is needed in a process of patterning the second seed film  150 . However, in the method of manufacturing the driving backplane  1  for display provided in some embodiments of the present disclosure, there is no need to use an additional mask in the process of patterning the second seed film  150  to form the second seed layer; as a result, the etching manner is simple and the etching efficiency is high, which is conducive to reducing the production cost. 
     In some embodiments, after the first electroplated metal layer  140  is formed and before the second seed film  150  is formed, the method further includes step  11  (S 11 ). 
     In S 11 , as shown in part (A) in  FIG. 7  and part (B) in  FIG. 6 , a first planarization layer  181  is formed. The first planarization layer  181  includes a plurality of fifth hollow-out portions  1811 . As shown in part (B) in  FIG. 6 , an orthogonal projection of each fifth hollow-out portion  1811  on the base  10  overlaps with an orthogonal projection of one second hollow-out portion  161  to be formed on the base  10 . 
     Based on this, in some examples, as shown in part (B) in  FIG. 7 , S 201  includes forming the second seed film  150  on the base  10  on which the first planarization layer  181  has been formed. The second seed film  150  covers a surface of the first planarization layer  181  away from the base  10 , and fills the plurality of fifth hollow-out portions  1811 , so that the second seed film  150  is in contact with the second conductive sub-lines  152  of the first electroplated metal layer  140 . 
     The description that the orthogonal projection of each fifth hollow-out portion  1811  on the base  10  overlaps with the orthogonal projection of one second hollow-out portion  161  to be formed on the base  10  may be understood as that, each fifth hollow-out portion  1811  is located in a region where the one second hollow-out portion  161  to be formed is located. An area of the orthogonal projection of the fifth hollow-out portion  1811  on the base  10  may be less than an area of the orthogonal projection of the second hollow-out portion  161  to be formed on the base  10 , or the area of the orthogonal projection of the fifth hollow-out portion  1811  on the base  10  may be equal to the area of the orthogonal projection of the second hollow-out portion  161  to be formed on the base  10 . 
     The fifth hollow-out portion  1811  penetrates through the first planarization layer  181 , so as to expose a portion of the second conductive sub-line  152  used for contacting with the first electrode  13  to be formed. That is, the fifth hollow-out portion  1811  is used for electrically connecting the first electrode  13  to be formed to the first conductive line  15 . 
     In this way, the first planarization layer  181  may ensure that the first conductive line  15  is insulated from the second conductive line  16 . In addition, the first planarization layer  181  may planarize the base  10  on which the first electroplated metal layer  140  has been formed, which is conducive to subsequently forming the second seed film  150  on the base  10 , and may avoid an adverse effect on the fabrication of the second seed film  150  due to an uneven surface on which the second seed film  150  is formed. 
     In some embodiments, the method further includes steps  301  to  304  (S 301  to S 304 ). 
     In S 301 , as shown in  FIG. 8A , a second planarization layer  182 , a passivation layer  184 , and a third planarization layer  183  are sequentially formed on the base  10  on which the second conductive pattern layer  12  has been formed. 
     That is, the passivation layer  184  is located on a side of the second planarization layer  182  away from the base  10 , and the third planarization layer  183  is located on a side of the passivation layer  184  away from the second planarization layer  182 . For example, the second planarization layer  182  and the third planarization layer  183  are made of photosensitive PI or an acrylic material. 
     The second planarization layer  182  is configured to planarize the base  10  on which the second conductive pattern layer  12  has been formed, so as to facilitate subsequent fabrication of the passivation layer  184  and the third planarization layer  183 . 
     For example, the passivation layer  184  is made of SiN. The passivation layer  184  is configured to prevent oxygen and nitrogen from affecting the second conductive pattern layer  12  during the formation of the third planarization layer  183 . 
     In S 302 , as shown in  FIG. 8B , a metal film is formed on a side of the base  10  away from the third planarization layer  183 , and the metal film is patterned to form a plurality of first bonding electrodes  17  and a plurality of second bonding electrodes  18 . 
     For example, the first bonding electrodes  17  and the second bonding electrodes  18  are made of a conductive metal such as Cu or Ag. In some examples, the first bonding electrodes  17  and the second bonding electrodes  18  are made of the same material as the first conductive lines  15  and the second conductive lines  16 . 
     The base  10  may be turned over when the metal film is formed, so that a surface of the base  10  away from the third planarization layer  183  faces upwards, which is as shown in  FIG. 8B . 
     In S 303 , as shown in  FIG. 8C , a plurality of first connection lines  19  and a plurality of second connection lines  110  are formed on side faces of the base  10 . Each first connection line  19  extends to positions of a corresponding first conductive line  15  and a corresponding first bonding electrode  17  from a side face of the base  10 , and is electrically connected to the first conductive line  15  and the first bonding electrode  17 ; and each second connection line  110  extends to positions of a corresponding second conductive line  16  and a corresponding second bonding electrode  18  from a side face of the base  10 , and is electrically connected to the second conductive line  16  and the second bonding electrode  18 . For example, the first connection line  19  and the second connection line  110  extend to surfaces of the first bonding electrode  17  and the second bonding electrode  18  away from the base  10 , respectively. 
     Therefore, the first connection line  19  is electrically connected to a side face of the first conductive line  15 , and the second connection line  110  is electrically connected to a side face of the second conductive line  16 . 
     In some examples, the plurality of first connection lines  19  are arranged in parallel, and the plurality of second connection lines  110  are arranged in parallel. 
     The plurality of first connection lines  19  may be formed on one or more side faces of the base  10 , as long as any two first connection lines  19  are insulated from each other. Similarly, the plurality of second connection lines  110  may be formed on one or to more side faces of the base  10 , as long as any two second connection lines  110  are insulated from each other. 
     For example, the plurality of first connection lines  19  are formed on two opposite side faces of the base  10 , and the plurality of second connection lines  110  are formed on another two opposite side faces of the base  10 . For example, the two opposite side faces are parallel to a width direction of the base  10 , and the another two opposite side faces are parallel to a length direction of the base  10 . 
     In some examples, referring to  FIG. 2 , the plurality of first connection lines  19  are divided into a plurality of first connection line groups, each first connection line group includes two first connection lines  19 , and the two first connection lines  19  are disposed on the two opposite side faces of the base  10 . Two ends of each first conductive line  15  are electrically connected to the two first connection lines  19  in the first connection line group. The plurality of second connection lines  110  are divided into a plurality of second connection line groups, each second connection line group includes two second connection lines  110 , and the two second connection lines  110  are disposed on the another two opposite side faces. Two ends of each second conductive line  16  are connected to the two second connection lines  110  in the second connection line group. In this way, each first conductive line  15  and each second conductive line  16  adopt a manner of power supply from two ends, so that electrical signals are transmitted to the first conductive line  15  from the two ends of the first conductive line  15  and the second conductive line  16  from the two ends of the second conductive line  16 , which is conducive to ensuring the uniformity of the electrical signal transmission and reduce the voltage drop. 
     In a case where the first bonding electrode  17  and the second bonding electrode  18  are connected to external power supplies, the first bonding electrode  17  transmits an electrical signal to the first conductive line  15  through the first connection line  19 , and the second bonding electrode  18  transmits an electrical signal to the second conductive line  16  through the second connection line  110 . 
     In S 304 , as shown in  FIG. 8D , at least the passivation layer  184  and the third planarization layer  183  are patterned to obtain a passivation pattern layer  1841  and a third planarization pattern layer  1831  and expose the first electrodes  13  and the second electrodes  14 . 
     In a case where the second planarization layer  182  does not cover the second conductive pattern layer  12 , for example, an upper surface of the second planarization layer  182  (i.e., a surface of the second planarization layer  182  away from the base  10 ) is flush with an upper surface of the second conductive pattern layer  12  (i.e., a surface of the second conductive pattern layer  12  away from the base  10 ), as shown in  FIG. 8D , only the passivation layer  184  and the third planarization layer  183  are patterned to form a plurality of sixth hollow-out portions  1851  that penetrate through the passivation layer  184  and the third planarization layer  183 . The plurality of sixth hollow-out portions  1851  expose the first electrodes  13  and the second electrodes  14  for subsequently bonding light-emitting devices to the first electrodes  13  and the second electrodes  14 . 
     In a case where the second planarization layer  182  covers the second conductive pattern layer  12 , as shown in  FIG. 8E , the second planarization layer  182 , the passivation layer  184 , and the third planarization layer  183  are patterned to form a plurality of sixth hollow-out portions  1851  that penetrate through the second planarization layer  182 , the passivation layer  184  and the third planarization layer  183 . The plurality of sixth hollow-out portions  1851  expose the first electrodes  13  and the second electrodes  14  for subsequently bonding light-emitting devices to the first electrodes  13  and the second electrodes  14 . 
     In the process of manufacturing the driving backplane  1  for display, the second planarization layer  182 , the passivation layer  184  and the third planarization layer  183  are fabricated first, and then the first bonding electrodes  17  and the second bonding electrodes  18  are fabricated, and after that, the second planarization layer  182 , the passivation layer  184  and the third planarization layer  183  are patterned; in this way, it may prevent oxygen or nitrogen from affecting the first electrodes  13  and the second electrodes  14  in the process of fabricating the first bonding electrodes  17  and the second bonding electrodes  18 , thereby ensuring qualities of the first electrodes  13  and the second electrodes  14 . In addition, since the first bonding electrodes  17  and the second bonding electrodes  18 , and the first conductive lines  15  and the second conductive lines  16  are located on two sides of the base  10  in the embodiments of the present disclosure, in a case where a size of the base  10  is certain, a size of a display region of a display panel adopting the driving backplane  1  for display may be large, and a display area of the display panel is large. Therefore, a screen-to-body ratio is increased, and it is conducive to achieving a narrow bezel of the display panel. 
     In some examples, forming the plurality of first connection lines  19  and the plurality of second connection lines  110  on the side faces of the base  10  includes: forming the plurality of first connection lines  19  and the plurality of second connection lines  110  on the side faces of the base  10  through any one of pad printing, three-dimension (3D) printing (also referred to as additive manufacturing), patterning process or laser cutting. 
     For example, the plurality of first connection lines  19  and the plurality of second connection lines  110  are formed by pad printing with a conductive silver adhesive. For example, a conductive silver layer is coated on a substrate first; then the conductive silver layer is cut to obtain a plurality of conductive silver strips; and after that, the plurality of conductive silver strips are adhered to the side faces of the base  10  through an adhesive. The plurality of conductive silver strips are the plurality of first connection lines  19  and the plurality of second connection lines  110 . 
     For another example, the plurality of first connection lines  19  and the plurality of second connection lines  110  are formed by printing powder-like metal layer by layer on the side faces of the base  10  through the 3D printing. 
     For yet another example, the plurality of first connection lines  19  and the plurality of second connection lines  110  are formed through the patterning process. For example, a metal film is formed on the side faces of the base  10  through a magnetron sputtering process, and then the metal film is etched to form the plurality of first connection lines  19  and the plurality of second connection lines  110 . 
     For yet another example, the plurality of first connection lines  19  and the plurality of second connection lines  110  are formed through the laser cutting process. For example, a metal film is formed on the side faces of the base  10  first, and then the metal film is cut through laser, so that the plurality of first connection lines  19  and the plurality of second connection lines  110  are formed. 
     For example, a material of the first connection lines  19  and the second connection lines  110  is Cu or Ag. 
     The manners of fabricating the first connection lines  19  and the second connection lines  110  are simple and various; therefore, a suitable manner may be selected according to actual needs, which has high flexibility. 
     As shown in  FIGS. 9A and 9B , in some embodiments, the second conductive pattern layer  12  further includes a plurality of connection electrodes  111 . An edge portion of the first conductive line  15  in a length direction thereof is electrically connected to a connection electrode  111 , and the first connection line  19  extends from the side face of the first conductive line  15  to a side face of the connection electrode  111  that is electrically connected to the first conductive line  15 . 
     In a case where the two ends of the first conductive line  15  are electrically connected to the two first connection lines  19  in the first connection line group, each edge portion of the first conductive line  15  in the length direction thereof is electrically connected to one connection electrode  111 , and each first connection line  19  in the first connection line group extends from the side face of the first conductive line  15  to the side face of the connection electrode  111  that is electrically connected to the first conductive line  15 . The length direction of the first conductive line  15  is a direction in which the first conductive line  15  extends. For example, in the thickness direction of the base  10 , an orthogonal projection, on the base  10 , of the connection electrode  111 , is located within an orthogonal projection, on the base  10 , of a corresponding first conductive line  15 . 
     Based on this, an electrical signal may be transmitted from the first bonding electrode  17  to the first conductive line  15  through the first connection line  19  and the connection electrode  111  in sequence. Since the connection electrode  111  and the second conductive line  16  are located in the same layer, heights, in the thickness direction of the base  10 , of portions of the first connection line  19  and the second connection line  110  extending in the thickness direction of the base  10  are the same, which is conducive to fabricating the first connection line  19  and the second connection line  110  on the side faces of the base  10 . 
     In some examples, as shown in  FIG. 10A , the method of manufacturing the driving backplane  1  for display further includes: forming a protective layer  2  at least on the side faces of the base  10  on which the plurality of first connection lines  19  and the plurality of second connection lines  110  have been formed, and the protective layer  2  covers the plurality of first connection lines  19  and the plurality of second connection lines  110 . 
     The protective layer  2  may prevent the first connection lines  19  and the second connection lines  110  from being scratched, thereby reducing a defect rate of the driving backplane  1  for display during the manufacturing process. For example, the protective layer  2  is made of a resin. 
     In some examples, as shown in  FIG. 10B , the method of manufacturing the driving backplane  1  for display further includes: forming an insulating protection layer  186  on sides of the first bonding electrodes  17  and the second bonding electrodes  18  away from the base  10 . The insulating protection layer  186  is provided with through holes  1861  that expose portions of the first bonding electrodes  17  and the second bonding electrodes  18 . The insulating protection layer  186  is used for preventing oxygen, moisture and nitrogen in the environment from affecting the first bonding electrodes  17  and the second bonding electrodes  18 . 
     For example, a material of the insulating protection layer  186  includes SiN. 
     For example, the insulating protection layer  186  may be formed through a magnetron sputtering process. 
     In some embodiments, as shown in  FIG. 11 , the driving backplane  1  for display has a display region  100  including a plurality of sub-pixel regions P. The plurality of sub-pixel regions P may be arranged in different manners (e.g., a manner of rows and columns or other manners) according to actual needs. As shown in  FIG. 11 , the plurality of sub-pixel regions P are arranged in a plurality of columns in a first direction X and a plurality of rows in a second direction Y. 
     As shown in  FIGS. 2, 9A and 12A to 12E , at least one electrode group is disposed in a sub-pixel region P. For example, in the plurality of sub-pixel regions P, each sub-pixel region P is provided with one electrode group. For another example, in the plurality of sub-pixel regions P, each sub-pixel region P is provided with electrode groups. For yet another example, in the plurality of sub-pixel regions P, a certain sub-pixel region P or each sub-pixel region P of some sub-pixel regions P is provided with one electrode group, and each sub-pixel region P of remaining sub-pixel regions P is provided with electrode groups. 
     The plurality of first conductive lines  15  extend in a row direction (i.e., the first direction X) of the plurality of sub-pixel regions P, and the plurality of second conductive lines  16  extend in a column direction (i.e., the second direction Y) of the plurality of sub-pixel regions P. All first electrodes  13  in a row of sub-pixel regions P are electrically connected to at least one first conductive line  15 , and all second electrodes  14  in a column of sub-pixel regions P are electrically connected to at least one second conductive line  16 . 
     In some examples, as shown in  FIGS. 2, 9A, and 12A to 12E , all first electrodes  13  in the row of sub-pixel regions P are electrically connected to at least two first conductive lines  15 , and different first conductive lines  15  are connected to different first electrodes  13 ; and all second electrodes  14  in the column of sub-pixel regions P are electrically connected to at least one second conductive line  16 . For example, all first electrodes  13  in each row of sub-pixel regions P are electrically connected to at least two first conductive lines  15 , and different first conductive lines  15  are connected to different first electrodes  13 ; and all second electrodes  14  in each column of sub-pixel regions P are electrically connected to at least one second conductive line  16 . 
     In some examples, at least one sub-pixel region P is provided with two electrode groups, which are a first electrode group and a second electrode group. For example, each sub-pixel region P of the plurality of sub-pixel regions P is provided with two electrode groups. For another example, a certain sub-pixel region P of the plurality of sub-pixel regions P or each sub-pixel region P of some sub-pixel regions P of the plurality of sub-pixel regions P is provided with two electrode groups, and each sub-pixel region P of remaining sub-pixel regions P is provided with one electrode group. 
     For example, as shown in  FIG. 12A , in the sub-pixel region P provided with two electrode groups, the first electrode  13  in the first electrode group and the first electrode  13  in the second electrode group are electrically connected to the same first conductive line  15 , the second electrode  14  in the first electrode group is electrically connected to a second conductive line  16 , and the second electrode  14  in the second electrode group is electrically connected to another second conductive line  16 . That is, the first electrodes  13  in the two electrode groups are electrically connected to the same first conductive line  15 , and the second electrodes  14  in the two electrode groups are electrically connected to different second conductive lines  16 . 
     For another example, as shown in  FIGS. 12B, 12C, and 12D , in the sub-pixel region P provided with two electrode groups, the first electrode  13  in the first electrode group and the first electrode  13  in the second electrode group are electrically connected to the same first conductive line  15 , and the second electrode  14  in the first electrode group and the second electrode  14  in the second electrode group are electrically connected to the same second conductive line  16 . That is, the first electrodes  13  in the two electrode groups are electrically connected to the same first conductive line  15 , and the second electrodes  14  in the two electrode groups are electrically connected to the same second conductive line  16 . In  FIG. 12C , the first electrodes  13  in the two electrode groups are independent of each other. In  FIG. 12D , the first electrodes  13  in the two electrode groups are shared. 
     For another example, as shown in  FIG. 12E , in the sub-pixel region P provided with two electrode groups, the first electrode  13  in the first electrode group is electrically connected to a first conductive line  15 , and the first electrode  13  in the second electrode group is electrically connected to another first conductive line  15 . The second electrode  14  in the first electrode group and the second electrode  14  in the second electrode group are electrically connected to the same second conductive line  16 . That is, the first electrodes  13  in the two electrode groups are electrically connected to two different first conductive lines  15 , and the two second electrodes  14  in the two electrode groups are electrically connected to the same second conductive line  16 . 
     In the sub-pixel region P provided with two electrode groups, one of the two electrode groups drives the light-emitting device to display normally, and the other electrode group serves as a spare electrode group. That is, in a case where one of the electrode groups is bonded to the light-emitting device, if the light-emitting device fails to work normally, the spare electrode group is bonded to another light-emitting device, so that the first electrode  13  and the second electrode  14  in the spare electrode group drives the another light-emitting device to emit light. 
     In a process of manufacturing the display panel using the driving backplane  1  for display, for the sub-pixel region P provided with two electrode groups, when bonding the light-emitting device, the light-emitting device is bonded to the first electrode  13  and the second electrode  14  in one of the two electrode groups first. For example, the light-emitting device is bonded to the first electrode group first. The display panel is tested after the first electrode groups in all sub-pixel regions P are each bonded to one light-emitting device, each of all sub-pixel regions P being provided with two electrode groups. If a light-emitting device in a certain sub-pixel region P fails to work normally, another light-emitting device is bonded to the second electrode group in the certain sub-pixel region P, the first electrode  13  in the first electrode group that is unable to drive the light-emitting device to emit light is disconnected from the first conductive line  15  and/or the second electrode  14  in the first electrode group that is unable to drive the light-emitting device to emit light is disconnected from the second conductive line  16 . For example, the first electrode  13  and/or the second electrode  14  may be cut off through a laser process. 
     For example, as shown in  FIG. 13 , if the second electrode group in the second sub-pixel region P- 2  needs to be bonded to another light-emitting device  3 , the first electrode  13  in the first electrode group in the second sub-pixel region P- 2  may be cut off, so that the first electrode  13  is disconnected from the first conductive line  15 ; as a result, the light-emitting device  3  bonded to the first electrode group is unable to be driven to emit light. 
     It will be noted that, in a case where the first electrode  13  is disconnected from the first conductive line  15  and/or the second electrode  14  is disconnected from the second conductive line  16 , it is possible to only cut off the first electrode  13  and/or the second electrode  14 , so as to avoid damaging the structures of the first conductive line  15  and the second conductive line  16 . 
     In the display panel having the driving backplane  1  for display in some embodiments of the present disclosure, when the light-emitting device  3  in the sub-pixel region that is unable to normally emit light is maintained, there is no need to remove the light-emitting device  3  that is previously bonded, and the another light-emitting device may be directly bonded to the spare electrode group; as a result, a maintenance process is simplified, a maintenance efficiency is high, and a maintenance success rate is high. 
     Based on this, dimensions of the first conductive line  15  and dimensions of the second conductive line  16  may be determined according to actual application needs. 
     In some embodiments, a width of the first conductive line  15  in a direction perpendicular to the direction in which the first conductive line  15  extends is greater than a width of the second conductive line  16  in a direction perpendicular to the direction in which the second conductive line  16  extends. In this way, since a conductive line with a large width may provide a stable current output, the current on the first conductive line  15  is large; therefore, in a case where the first conductive line  15  is electrically connected to the positive electrode of the light-emitting device  3 , it is possible to satisfy a working current requirement of the positive electrode of the light-emitting device  3 . In addition, it is convenient to distinguish between the first conductive line  15  and the second conductive line  16  when the light-emitting device  3  is bonded, so as to distinguish between the first electrode  13  and the second electrode  14 . 
     In some examples, thicknesses of the first conductive line  15  and the second conductive line  16  are the same. 
     Some embodiments of the present disclosure provide a driving backplane  1  for display manufactured through the above method. As shown in  FIG. 2 , the driving backplane  1  for display includes a base  10 , a first conductive pattern layer  11  disposed on the base  10 , and a second conductive pattern layer  12  disposed on a side of the first conductive pattern layer  11  away from the base  10 . The first conductive pattern layer  12  includes a plurality of first conductive lines  15 . The second conductive pattern layer  12  includes a plurality of electrode groups and a plurality of second conductive lines  16 , and the plurality of first conductive lines  15  and the plurality of second conductive lines  16  cross and are insulated from each other. An electrode group of the plurality of electrode groups includes a first electrode  13  and a second electrode  14 , and the second electrode  14  is electrically connected to a corresponding second conductive line  16 . Orthogonal projections, on the base  10 , of the first electrode  13  and a corresponding first conductive line  15  have an overlapping region, and a portion of the first electrode  13 , whose orthogonal projection on the base  10  is located in the overlapping region, is in contact with a portion of the first conductive line  15 , whose orthogonal projection on the base  10  is located in the overlapping region. 
     As shown in  FIG. 13 , some embodiments of the present disclosure provide a display panel  4 . The display panel  4  includes the driving backplane  1  for display. As shown in  FIG. 11 , the driving backplane  1  for display has a plurality of sub-pixel regions P. As shown in  FIG. 13 , the display panel  4  further includes a plurality of light-emitting devices  3 , and the plurality of light-emitting devices  3  are disposed in the plurality of sub-pixel regions P. Only one light-emitting device  3  in each sub-pixel region P is configured to emit light, and each light-emitting device  3  that is configured to emit light is electrically connected to the first electrode  13  and the second electrode  14  in the same electrode group disposed in the sub-pixel region P. 
     In some examples, the plurality of sub-pixel regions P include first sub-pixel regions, second sub-pixel regions and third sub-pixel regions. Each light-emitting device  3  disposed in the first sub-pixel region is configured to emit light of a first color, each light-emitting device  3  disposed in the second sub-pixel region is configured to emit light of a second color, and each light-emitting device  3  disposed in the third sub-pixel region is configured to emit light of a third color. The light of the first color, the light of the second color and the light of the third color are three primary colors (e.g., red, green and blue). 
     In some examples, the light-emitting device  3  located in the first sub-pixel region P- 1  emits red light, the light-emitting device  3  located in the second sub-pixel region P- 2  emits green light, and the light-emitting device  3  located in a third sub-pixel region P- 3  emits blue light. Since a current property of the light-emitting device  3  emitting red light is different from current properties of the light-emitting device  3  emitting green light and the light-emitting device  3  emitting blue light (the light-emitting device  3  emitting red light requires a larger current), a magnitude of an electrical signal provided by the first conductive line  15  for the light-emitting device  3  emitting red light is different from magnitude(s) of electrical signal(s) provided by first conductive line(s)  15  for the light-emitting device emitting green light and the light-emitting device emitting blue light. Based on this, in some examples, at least two first conductive lines  15  are arranged in each sub-pixel region P, one first conductive line  15  of the at least two first conductive lines  15  provides an electrical signal to the light-emitting device  3  emitting red light, and another first conductive line  15  of the at least two first conductive lines  15  provides another electrical signal to the light-emitting device emitting green light and the light-emitting device emitting blue light. 
     In some embodiments, a positive electrode of the light-emitting device  3  is electrically connected to the first electrode  13 , and a negative electrode of the to light-emitting device  3  is electrically connected to the second electrode  14 . 
     The display panel  4  has the same beneficial effects as the method of manufacturing the driving backplane  1  for display as described above, and details will not be repeated here. 
     It will be noted that, in a case where two electrode groups are provided in the sub-pixel region P, one or two light-emitting devices  3  may be provided in the sub-pixel region P. For the sub-pixel region P provided with two light-emitting devices  3 , only one light-emitting device  3  is configured to emit light, and the light-emitting device  3  is electrically connected to the first electrode  13  and the second electrode  14  in the electrode group corresponding thereto. 
     For example, in the sub-pixel region P provided with two electrode groups, if the sub-pixel region P is provided with only one light-emitting device  3 , one of the two electrode groups is connected to the light-emitting device  3 , and the first electrode  13  and the second electrode  14  in the electrode group drive the light-emitting device  3  to emit light; and if the sub-pixel region P is provided with two light-emitting devices  3 , although each light-emitting device  3  is connected to the first electrode  13  and the second electrode  14  in the corresponding electrode group, only one of the two electrode groups is able to drive the corresponding light-emitting device  3  to emit light normally, and the first electrode  13  and the second electrode  14  in the other electrode group is unable to drive the corresponding light-emitting device  3  to emit light. That is, in the sub-pixel region P, the first electrode  13  and the second electrode  14  in the electrode group that is able to drive the corresponding light-emitting device  3  to emit light normally are electrically connected to the light-emitting device  3 , and the first electrode  13  and the second electrode  14  in the other electrode group are not electrically connected to the corresponding light-emitting device  3 . Here, the phrase “electrically connected” means that electrical signals may be transmitted from the first electrode  13  and the second electrode  14  to the light-emitting device  3 , so as to drive the light-emitting device  3  to emit light. The electrical signal on the first electrode  13  is received from the first conductive line  15 , and the electrical signal on the second electrode  14  is received from the second conductive line  16 . Therefore, when an open circuit occurs between at least one of the first electrode  13  and the second electrode  14  in the other electrode group and the first conductive line  15  and/or the second conductive line  16 , the light-emitting device  3  corresponding to the other electrode group cannot be driven to emit light. 
     For example, as shown in  FIG. 13 , each of the first sub-pixel region P- 1  and the third sub-pixel region P- 3  is provided with one light-emitting device  3 , and each light-emitting device  3  is electrically connected to one electrode group in the sub-pixel region P where the light-emitting device  3  is located. 
     The second sub-pixel region P- 2  is provided with two light-emitting devices  3 , one of the two light-emitting devices  3  is electrically connected to the first electrode  13  and the second electrode  14  in one electrode group and is able to emit light normally; and the first electrode  13  in another electrode group connected to the other light-emitting device  3  is cut off, so that the first electrode  13  is disconnected from the first conductive line  15 , and an electrical signal cannot be transmitted from the first conductive line  15  to the first electrode  13 . Therefore, the other light-emitting device  13  is unable to emit light. 
     It will be noted that, in the second sub-pixel region P- 2 , only the first electrode  13  being cut off is taken as an example, of course, only the second electrode  14  may be cut off, or the first electrode  13  and the second electrode  14  are cut off. 
     It will be understood that, in each sub-pixel region P provided with light-emitting to device(s)  3 , the number of light-emitting device(s)  3  in the sub-pixel region P is less than or equal to the number of electrode group(s) in the sub-pixel region P. For example, in a case where there is one light-emitting device  3  in the sub-pixel region P, there may be two or more electrode groups in the sub-pixel region P, but only one of the electrode groups is electrically connected to the light-emitting device  3 , and remaining electrode groups are not electrically connected to the light-emitting device  3 . 
     In some examples, the light-emitting device  3  is a Mini LED or a Micro LED. 
     In some examples, the light-emitting devices  3  are installed on the driving backplane  1  for display through a bonding process. 
     The display panel  4  has the same beneficial effects as the driving backplane  1  for display, and details will not be repeated here. 
     Some embodiments of the present disclosure provide a display apparatus. As shown in  FIGS. 14A and 14B , the display apparatus includes a display screen, and the display screen includes a plurality of display panels  4  as described above. 
     As shown in  FIG. 14A , the plurality of display panels  4  are tiled to form a large-sized display screen. In some examples, as shown in  FIG. 14B , the display apparatus further includes a truss  5  and a housing  6 , the truss  5  and the housing  6  are fixedly connected through locking components  7 , and the housing  6  is provided with a plurality of magnetic pillars  61 . When the display panels  4  is installed, a plurality of magnets  8  are fixed on a back face of the display panels  4 . The number of the magnets  8  is equal to the number of the magnetic pillars  61 , and the magnets  8  are in one-to-one correspondence with the magnetic pillars  61 ; and thus the display panels  4  and the housing  6  are attracted and fixed through magnetic forces between the magnetic pillars  61  and the magnets  8 , thereby achieving the tiling of the plurality of display panels  4 . For example, a distance L between two adjacent display panels  4  is in a range of 0.9 pitch to 1.2 pitch, where 1 pitch is equal to a distance between two pins of the light-emitting device  3 . Since the distance between two adjacent display panels  4  is small, and the frame of the display panel  4  is narrow, gaps between the display panels  4  in the display screen formed by tiling the plurality of display panels  4  may be small, so that the tiling effect is good. 
     The plurality of display panels  4  are tiled to form the large-sized display screen, so that the display apparatus may be applied to large-size display and has a wide application range. 
     The foregoing descriptions are merely specific implementation manners of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art could conceive of changes or replacements within the technical scope of the present disclosure, which shall be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.