CN115911079A

CN115911079A - Display panel, preparation method thereof and display device

Info

Publication number: CN115911079A
Application number: CN202211644514.1A
Authority: CN
Inventors: 王林志; 席克瑞; 李伟; 秦锋
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2023-04-04
Also published as: CN111627953B; CN111627953A

Abstract

The embodiment of the invention discloses a display panel, a preparation method thereof and a display device, wherein the preparation method of the display panel comprises the steps of providing a transfer substrate and transferring a plurality of light-emitting diodes on the transfer substrate to obtain a transfer substrate; providing a driving substrate and preparing a driving circuit on the driving substrate to obtain a driving substrate; and aligning the bonding transfer substrate and the driving substrate to obtain the diode display panel. By adopting the technical scheme, the transfer substrate comprising the plurality of light-emitting diodes is obtained by transferring the plurality of light-emitting diodes on the transfer substrate, and then the transfer substrate and the driving substrate are bonded in an alignment manner at one time, so that the large-size diode display panel is obtained. The preparation method of the display panel provided by the embodiment of the invention can obtain the diode display panel with large size through one-time contraposition bonding, is different from the technical scheme that the diode display panel can be obtained only through multiple times of contraposition bonding in batches in the prior art, reduces the contraposition bonding times and ensures that the preparation process of the diode display panel is simple.

Description

Display panel, preparation method thereof and display device

The invention relates to a divisional application named as a display panel, a preparation method thereof and a display device, wherein the application date is 29/06/29/2020, and the application number is 202010611465.6.

Technical Field

The embodiment of the invention relates to the technical field of display, in particular to a display panel, a preparation method of the display panel and a display device.

Background

Micro-LED (Micro light emitting diode) is a novel display technology, compared with the existing OLED (organic light emitting diode) display, the Micro-LED has higher brightness and better luminous efficiency, has smaller volume and can realize transparent display by adopting the Micro-LED.

For large-area transparent display, the existing mature Micro-LED transfer equipment can only support 8-inch substrate transfer basically, so that the Micro-LED transfer equipment cannot be directly formed on a large-area transparent substrate at one time, for example, a large-area transparent display can be directly realized on a vehicle window.

Disclosure of Invention

In view of this, embodiments of the present invention provide a display panel, a manufacturing method thereof, and a display device, which implement large-area transparent display by one-time alignment bonding.

In a first aspect, an embodiment of the present invention provides a method for manufacturing a display panel, including:

providing a transfer substrate and transferring a plurality of light emitting diodes on the transfer substrate to obtain a transfer substrate;

providing a driving substrate and preparing a driving circuit on the driving substrate to obtain a driving substrate;

and aligning the bonding transfer substrate and the driving substrate to obtain the diode display panel.

In a second aspect, an embodiment of the present invention further provides a display panel, which is prepared by the preparation method of the display panel in the first aspect, and the display panel includes a transfer substrate and a driving substrate, and the transfer substrate is connected to the driving substrate in an alignment manner;

the transfer substrate comprises a transfer substrate and a plurality of light emitting diodes transferred onto the transfer substrate;

the drive base plate includes the drive substrate and sets up in the drive circuit of drive substrate towards transport base plate one side.

In a third aspect, an embodiment of the present invention further provides a display device, including the display panel of the second aspect.

According to the preparation method of the display panel, the transfer substrate comprising the light emitting diodes is obtained by transferring the light emitting diodes on the transfer substrate, then the transfer substrate and the driving substrate are bonded in an alignment mode for one time, and the diode display panel with the large size is obtained.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

fig. 1 is a schematic flow chart of a method for manufacturing a display panel according to an embodiment of the present invention;

FIG. 2 is a schematic flow chart illustrating a method for fabricating a display panel according to another embodiment of the present invention;

FIG. 3 is a schematic top view of a display panel corresponding to the method of FIG. 2;

FIG. 4 is a schematic diagram of a driving substrate and a driving circuit thereof in the display panel shown in FIG. 3;

FIG. 5 is a schematic cross-sectional view of the driving substrate shown in FIG. 4 taken along AA';

FIG. 6 is a schematic cross-sectional view of the driving substrate shown in FIG. 4 taken along BB';

FIG. 7 is a schematic cross-sectional view of the driving substrate shown in FIG. 4 taken along line DD';

FIG. 8 is a schematic structural diagram of a transfer substrate aligned and bonded with the driving substrate shown in FIG. 4;

FIG. 9 is a schematic diagram of a driving circuit in the display panel shown in FIG. 3;

FIG. 10 is a schematic flow chart illustrating a method for fabricating a display panel according to another embodiment of the present invention;

FIG. 11 is a schematic diagram of another embodiment of a driving circuit in the display panel of FIG. 3;

FIG. 12 is a schematic flow chart illustrating a method for fabricating a display panel according to another embodiment of the present invention;

fig. 13 is a schematic layout of a circuit configuration of the drive circuit shown in fig. 11;

FIG. 14 is a schematic cross-sectional view of the driving substrate taken along EE' of the circuit layout shown in FIG. 13;

fig. 15 is a schematic structural view after the array substrate is aligned with the driving substrate shown in fig. 14;

FIG. 16 is a schematic flowchart illustrating a method for fabricating a display panel according to yet another embodiment of the present invention;

fig. 17 to 19 are flow charts of the production of a transfer substrate corresponding to the production method shown in fig. 16;

FIG. 20 is a schematic view of the transport substrate and the driving substrate of FIG. 19 after bonding;

FIG. 21 is a schematic flowchart illustrating a method for fabricating a display panel according to yet another embodiment of the present invention;

fig. 22 to 23 are flow charts of the production of a transfer substrate corresponding to the production method shown in fig. 21;

FIG. 24 is a schematic flow chart illustrating a method for fabricating a display panel according to another embodiment of the present invention;

FIG. 25 is a schematic diagram of a top view of a display panel corresponding to the method of FIG. 24;

fig. 26 is a schematic view of a structure of a transfer substrate in the display panel shown in fig. 25;

FIG. 27 is a schematic cross-sectional view of the display panel of FIG. 25 taken along FF';

FIG. 28 is a schematic cross-sectional view taken along HH' of the display panel shown in FIG. 25;

FIG. 29 is a schematic cross-sectional view taken along line II' of the display panel shown in FIG. 25;

fig. 30 is a schematic structural diagram of a display device according to an embodiment of the present invention;

fig. 31 is a schematic structural diagram of a display device according to still another embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be fully described by the detailed description with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention and that all other embodiments, which can be derived by one of ordinary skill in the art without inventive faculty, based on the embodiments of the present invention, are within the scope of the present invention.

Fig. 1 is a schematic flow chart of a method for manufacturing a display panel according to an embodiment of the present invention, and referring to fig. 1, the method includes the following steps:

s110, providing a transfer substrate and transferring a plurality of light emitting diodes on the transfer substrate to obtain a transfer substrate.

For example, the transfer substrate may be a transparent substrate, and the transfer substrate is obtained by transferring a plurality of light emitting diodes on the transfer substrate. It should be noted that, in the embodiments of the present invention, how to transport a plurality of light emitting diodes on a transport substrate is not limited, and the transport may be multiple batch transports or may be a simultaneous transport.

Further, the light emitting diode may be a micro-LED having a size of about 50 μm, or a mini-LED having a size of about 100 μm, which are small compared to conventional LEDs and may be used to realize a transparent display. The person skilled in the art can select the target according to the requirement, and the embodiment of the present invention does not limit the target.

And S120, providing a driving substrate and preparing a driving circuit on the driving substrate to obtain a driving substrate.

Illustratively, the driving substrate may be a transparent substrate. The driving circuit mainly comprises a driving element and a wiring connected between the driving element and the light-emitting diode electrode, and the wiring is used for providing a control signal for the light-emitting diode to control the light-emitting diode to emit light. According to the driving method of the light emitting diode, an active driving circuit or a passive driving circuit can be designed accordingly, and a person skilled in the art can design the driving method by himself, which is not limited in the embodiment of the present invention.

S130, aligning the bonding transfer substrate and the driving substrate to obtain the diode display panel.

The alignment bonding transfer substrate and the driving substrate mainly refer to alignment bonding of electrodes of the light emitting diodes in the transfer substrate and a circuit for providing control signals for the light emitting diodes in the driving circuit. Because the transfer substrate is provided with the plurality of light emitting diodes corresponding to the plurality of light emitting diodes required by large-area transparent display, and the driving substrate is provided with the corresponding driving circuit, compared with the preparation method of batch multi-bonding in the prior art, the preparation method provided by the embodiment of the invention can obtain the diode display panel with a large size only by one-time para-bonding, and the preparation process is simpler and more efficient.

On the basis of the above embodiments, the method for manufacturing a display panel according to the embodiments of the present invention can respectively manufacture a connection electrode electrically connected to the light emitting diode and a connection electrode trace electrically connected to the connection electrode on the driving substrate; a connecting electrode electrically connected with the light-emitting diode can be prepared on the transfer substrate, and a connecting electrode wire electrically connected with the connecting electrode is prepared on the driving substrate; meanwhile, in the manufacturing method of the display panel provided by the embodiment of the invention, the driving method of the light emitting diode may be passive driving or active driving, and the following detailed description is respectively made for different setting methods of the connection electrode and different driving methods of the light emitting diode.

First, a method for manufacturing a passively driven light emitting diode by separately manufacturing a connection electrode electrically connected to the light emitting diode and a connection electrode trace electrically connected to the connection electrode on a driving substrate is described.

On the basis of the above embodiments, fig. 2 is a schematic flow chart of a manufacturing method of a display panel according to still another embodiment of the present invention, which further details the manufacturing method of the driving substrate and shows the manufacturing method of the passive driving circuit on the driving substrate. Referring to fig. 2, the method comprises the steps of:

s210, providing a transfer substrate and transferring a plurality of light emitting diodes on the transfer substrate to obtain a transfer substrate.

And S220, providing a driving substrate.

S230, preparing a first connecting electrode and a second connecting electrode in a first area of the driving substrate, and preparing a first connecting electrode wire, a first connecting electrode wire and a binding terminal in a second area of the driving substrate; the first connecting electrode wire is electrically connected with the first connecting electrode and the binding terminal respectively, and the first connecting electrode wire is electrically connected with the second connecting electrode and the binding terminal respectively.

Fig. 3 is a schematic top view of a display panel corresponding to the manufacturing method shown in fig. 2, showing a relative position relationship between the transfer substrate 100 and the driving substrate 200, and fig. 4 is a schematic structural view of the driving substrate and the driving circuit in the display panel shown in fig. 3, showing a structure of a passive driving circuit and an electrical connection relationship between the light emitting diode 101 and the driving circuit. Referring to fig. 3 and 4, the transfer substrate 100 includes a plurality of light emitting diodes 101 therein, and the light emitting diodes 101 include a light emitting structure 1011 and a first electrode 1012 and a second electrode 1013 disposed on one side of the light emitting structure 1011; the driving substrate 201 includes a first region Q1 and a second region Q2, and a perpendicular projection of the transfer substrate 100 on a plane in which the driving substrate 201 is located at least partially overlaps the first region Q1. The first region Q1 of the driving substrate 201 is provided with a first connecting electrode 202 and a second connecting electrode 203, the second region Q2 of the driving substrate 201 is provided with a first connecting electrode trace 204, a second connecting electrode trace 205 and a binding terminal 206, and the binding terminal 206 is arranged on one side of the second region Q2 away from the first region Q1; the first connection electrode wire 204 is electrically connected to the first connection electrode 202 and the binding terminal 206, respectively, and the second connection electrode wire 205 is electrically connected to the second connection electrode 203 and the binding terminal 206, respectively.

It should be noted that, in the embodiment of the present invention, only the binding terminal 206 is disposed on the side of the second region Q2 away from the first region Q1, but the disposition is not limited thereto, and for example, referring to fig. 4, the binding terminal may also be disposed on the upper side or the lower side of the second region, and those skilled in the art can set the binding terminal according to the requirement.

The first electrode 1012 may be an anode of the light emitting diode 101, and the second electrode 1013 may be a cathode of the light emitting diode 101. In the passive driving circuit of the light emitting diode 101, the light emitting diode 101 is controlled to emit light by providing control signals to the anode and the cathode of the light emitting diode respectively. The binding terminal 206 is an output end of the control signal, for example, the binding terminal 206 may be bound to and connected with a driver chip, or may be bound to and connected with a flexible circuit board, and the driver chip is bound to the flexible circuit board, so that a narrow frame design may be implemented, and a person skilled in the art may design the binding terminal 206 by himself, which is not limited in the embodiment of the present invention. As shown in fig. 4, the first electrode 1012 is electrically connected to the first connection electrode 202, the second electrode 1013 is electrically connected to the second connection electrode 203, the binding terminal 206 transmits a control signal to the first electrode 1012 through the first connection electrode 202 and the first connection electrode trace 204, and the binding terminal 206 also transmits a control signal to the second electrode 1013 through the second connection electrode 203 and the second connection electrode trace 205 to control light emission thereof.

For convenience of description, the driving substrate 201 is divided into a first region Q1 and a second region Q2. The first region Q1 corresponds to the display region, and the connection electrode in the first region Q1 is electrically connected to the binding terminal in the second region Q2 through the wiring in the second region Q2. It should be noted that the length of the inner trace of the second area Q2 can be set according to actual situations. Specifically, taking the example that the display panel 10 is located in the interlayer of the window glass, if the first region Q1 is located at the center of the window glass, the trace in the second region Q2 is longer, so that the line can be led to the frame side of the window and electrically connected to the binding terminal 206 located on the frame side of the window; whereas if the first region Q1 is located at the edge of the window pane, the second region Q2 may be a bonding zone, the length of the lead wires being short, as long as there are lead wires in the bonding zone that are correspondingly connected to the connection electrodes in the first region Q1. In the following, the first area Q1 is located at the center of the vehicle window, and the routing in the second area Q2 is longer for example, which is not repeated here.

As can be seen from fig. 4, the first connection electrode 202 and the second connection electrode 203 may cross each other, and thus, the first connection electrode 202 and the second connection electrode 203 need to be disposed in different film layers to realize mutual independence of electrical signals when the driving circuit is prepared. Exemplarily, fig. 5 is a schematic cross-sectional structure of the driving substrate shown in fig. 4 taken along AA ', fig. 6 is a schematic cross-sectional structure of the driving substrate shown in fig. 4 taken along BB ', fig. 7 is a schematic cross-sectional structure of the driving substrate shown in fig. 4 taken along DD ', and the structure of the driving substrate 200 in the first region Q1 is shown in different viewing angles. Referring to fig. 5-7, the surface of the driving substrate 201 is sequentially provided with the first connecting electrode 202, the insulating layer 207, and the second connecting electrode 203 from bottom to top, and the first connecting electrode 202 located at the lower layer can be extended to the film layer where the second connecting electrode 203 is located by providing a through hole in the insulating layer 207 and filling the through hole with the conductive electrode 2021, so as to prepare for the subsequent electrical connection between the first electrode 1012 of the light emitting diode 101 and the first connecting electrode 202. For example, the conductive electrode 2021 may be prepared under the same mask process as the second connection electrode 203.

The connection electrodes in the first area Q1 and the connection electrode traces in the second area Q2 may be obtained by different preparation methods, and several possible embodiments are described as examples below.

Alternatively, the first connection electrode 202 may be prepared in the first area Q1 of the driving substrate 201, the first connection electrode trace 204 may be prepared in the second area Q2 of the driving substrate 201, the second connection electrode 203 may be prepared in the first area Q1 of the driving substrate 201, and the second connection electrode trace 205 may be prepared in the second area Q2 of the driving substrate 201. In other words, the first connection electrode 202 and the first connection electrode trace 204 may be prepared under the same mask process, and then the second connection electrode 203 and the second connection electrode trace 205 may be prepared under the same mask process, although the insulating layer 207 may be prepared before the second connection electrode 203 and the second connection electrode trace 205 are prepared, and will not be described herein.

In addition, the first connection electrode trace 204 and the second connection electrode trace 205 can be prepared under the same mask process as the first connection electrode 202 at the same time, and the electrical connection between the second connection electrode 203 and the second connection electrode trace 205 is realized by providing a through hole exposing the second connection electrode trace 205 in the insulating layer 207; alternatively, the first connection electrode trace 204 and the second connection electrode trace 205 may also be simultaneously prepared with the second connection electrode 203 under the same mask process, and the electrical connection between the first connection electrode 202 and the first connection electrode trace 204 is realized by providing a through hole exposing the first connection electrode 202 in the insulating layer 207. One skilled in the art can select any one of the above methods to fabricate the passive driving circuit on the driving substrate 201, which is not limited in the embodiments of the invention. In subsequent designs, the connecting electrodes (or signal lines) and the traces that are electrically connected in the first region Q1 and the second region Q2 correspondingly to each other can be prepared by any one of the above 3 methods, and are not described in detail below.

And S240, bonding the transfer substrate and the driving substrate in a mode that the first electrode is aligned with the first connecting electrode and the second electrode is aligned with the second connecting electrode to obtain the diode display panel.

Fig. 8 is a schematic structural diagram of the transfer substrate and the driving substrate shown in fig. 4 after alignment bonding, showing an alignment relationship between electrodes of the light emitting diode in the transfer substrate and connection electrodes in the driving substrate, referring to fig. 8, the second electrode 1013 is aligned with the second connection electrode 203, and the first connection electrode 202 is extended to the film layer where the second connection electrode 203 is located through the conductive electrode 2021, so that the first electrode 1012 can be aligned with the first connection electrode 202 by being aligned with the conductive electrode 2021, and the transfer substrate and the driving substrate can be bonded at one time after alignment, thereby obtaining the diode display panel.

In summary, the above embodiments describe in detail how to respectively prepare the connection electrode electrically connected to the light emitting diode and the connection electrode trace electrically connected to the connection electrode on the driving substrate, and at the same time, prepare a preparation method of the passively driven light emitting diode. Next, a method for manufacturing a light emitting diode with active driving by respectively manufacturing a connection electrode electrically connected to the light emitting diode and a connection electrode trace electrically connected to the connection electrode on a driving substrate will be described.

First, the active driving circuit is described as "1T" (one driving transistor) as an example. Fig. 9 is a schematic diagram of a driving circuit in the display panel shown in fig. 3, and only one light emitting diode 101 is taken as an example to show a circuit structure in which the driving mode is active driving. Referring to fig. 3, as in the previous embodiment, in the present embodiment, the light emitting diode includes a light emitting structure 1011 and a first electrode 1012 and a second electrode 1013 disposed on one side of the light emitting structure 1011; the driving substrate 201 includes a first region Q1 and a second region Q2, and a perpendicular projection of the transfer substrate 100 on a plane in which the driving substrate 201 is located at least partially overlaps the first region Q1. Specifically, fig. 10 is a schematic flow chart of a method for manufacturing a display panel according to another embodiment of the present invention, as shown in fig. 10, if the driving circuit shown in fig. 9 is to be manufactured on the driving substrate 201, the method for manufacturing a display panel may specifically include the following steps:

s310, providing a transfer substrate and transferring a plurality of light emitting diodes on the transfer substrate to obtain a transfer substrate.

And S320, providing a driving substrate.

S330, preparing a plurality of first scanning lines, a plurality of first data lines, a plurality of first transistors and a plurality of second connecting electrodes in a first area of the driving substrate, wherein the control end of each first transistor is electrically connected with the corresponding first scanning line, and the input end of each first transistor is electrically connected with the corresponding first data line.

S340, preparing a plurality of first scanning connecting wires, a plurality of first data connecting wires, a plurality of second connecting electrode wires and binding terminals in a second area of the driving substrate; the first scanning connection wire is electrically connected with the first scanning line and the binding terminal respectively, the first data connection wire is electrically connected with the first data line and the binding terminal respectively, and the second connection electrode wire is electrically connected with the second connection electrode and the binding terminal respectively.

Referring to fig. 9, the first scan line and the first scan connection trace are shown as G1 in fig. 9, the first data line and the first data connection trace are shown as S1 in fig. 9, and the second connection electrode trace is shown as Vss in fig. 9.

And S350, aligning the bonding transfer substrate and the driving substrate in a mode that the first electrode is aligned with the output end of the first transistor and the second electrode is aligned with the second connecting electrode to obtain the diode display panel.

The first electrode (anode) is aligned with the output end of the first transistor, and the second electrode (cathode) is aligned with the second connecting electrode, so that the transfer substrate and the driving substrate can be bonded at one time, and the diode display panel is obtained.

Next, an example in which the active drive circuit is "2T1C" (two drive transistors and one capacitor) will be described. In a diode display panel, the active driving circuit usually adopts a 2T1C design. Referring to fig. 11, fig. 11 is a schematic diagram of another principle of a driving circuit in the display panel shown in fig. 3, showing another active driving circuit of the light emitting diode. The manufacturing method of the driving circuit shown in fig. 9 can be realized by referring to the manufacturing method of the present embodiment, and the manufacturing method of the 2T1C type active driving circuit is only described as an example. As in the previous embodiments, referring to fig. 3, the light emitting diode 101 in this embodiment includes a light emitting structure 1011 and a first electrode 1012 and a second electrode 1013 disposed on one side of the light emitting structure 1011; the driving substrate 201 includes a first region Q1 and a second region Q2, and a perpendicular projection of the transfer substrate 100 on a plane in which the driving substrate 201 is located at least partially overlaps the first region Q1. Specifically, fig. 12 is a schematic flow chart of a method for manufacturing a display panel according to another embodiment of the present invention, and as shown in fig. 12, if the driving circuit shown in fig. 11 is to be manufactured on the driving substrate, the method for manufacturing a display panel may specifically include the following steps:

s410, providing a transfer substrate and transferring a plurality of light emitting diodes on the transfer substrate to obtain a transfer substrate.

And S420, providing a driving substrate.

S430, preparing a plurality of second scanning lines, a plurality of second data lines, a plurality of voltage signal lines, a plurality of second transistors, a plurality of third transistors, a plurality of storage capacitors and a plurality of second connecting electrodes in a first area of a driving substrate, wherein control ends of the second transistors are electrically connected with the corresponding second scanning lines, input ends of the second transistors are electrically connected with the corresponding second data lines, output ends of the second transistors are electrically connected with control ends of the third transistors and first plates of the storage capacitors, and input ends of the third transistors are electrically connected with the corresponding voltage signal lines.

Specifically, fig. 13 is a schematic circuit structure layout of the driving circuit shown in fig. 11, fig. 14 is a schematic cross-sectional structure diagram of the driving substrate taken along EE' of the circuit layout shown in fig. 13, as shown in fig. 11, 13 and 14, the control terminal 221 (gate) of the second transistor T2 is electrically connected to the second scanning line G2 corresponding thereto, the input terminal 222 of the second transistor T2 is electrically connected to the second data line S2 corresponding thereto, the output terminal 223 of the second transistor T2 is electrically connected to the control terminal 231 of the third transistor T3 and the first plate 241 of the storage capacitor C, and the input terminal 232 of the third transistor T3 is electrically connected to the voltage signal line PVDD corresponding thereto. As can be seen from fig. 11, the output terminal of the third transistor T3 is electrically connected to the anode (first electrode 1012) of the light emitting diode 101, and the cathode (second electrode 1013) of the light emitting diode 101 is electrically connected to the PVEE signal line, so that the circuit layout shown in fig. 13 is further provided with a pad 208 and a pad 209, referring to fig. 13 and 14, the pad 208 is electrically connected to the output terminal 233 of the third transistor T3, and the pad 209 is electrically connected to the second connection electrode 203.

S440, preparing a plurality of second scanning connecting wires, a plurality of second data connecting wires, a plurality of voltage connecting wires, a plurality of second connecting electrode wires and binding terminals in a second area of the driving substrate; the second scanning connection wiring is respectively and electrically connected with the second scanning line and the binding terminal, the second data connection wiring is respectively and electrically connected with the second data line and the binding terminal, the voltage connection wiring is respectively and electrically connected with the voltage signal line and the binding terminal, and the second connection electrode wiring is respectively and electrically connected with the second connection electrode and the binding terminal.

The second connecting electrode trace is a PVEE signal line shown in fig. 11 and 13, and the second connecting electrode trace (PVEE) is electrically connected to the second connecting electrode 203 to transmit a control signal to the second electrode 1013. The second scan connection trace, the second data connection trace, the voltage connection trace, and the second connection electrode trace may be prepared by any one of the 3 methods provided by the above passive driving circuit, which is not described herein again.

And S450, aligning the bonding transfer substrate and the driving substrate in a mode that the first electrode is aligned with the output end of the third transistor and the second electrode is aligned with the second connecting electrode to obtain the diode display panel.

Fig. 15 is a schematic structural diagram of the aligned structure of the array substrate and the driving substrate shown in fig. 14, referring to fig. 15, the first electrode 1012 is aligned with the output end of the third transistor T3 through the pad 208, the second electrode 1013 is aligned with the second connection electrode 203 through the pad 209, and after the alignment, the primary bonding of the transfer substrate and the driving substrate can be realized, so as to obtain the diode display panel.

In summary, the above embodiments describe in detail how to prepare the connection electrode electrically connected to the light emitting diode and the connection electrode trace electrically connected to the connection electrode on the driving substrate, and prepare the preparation method of the active driving light emitting diode.

It should be noted that, a person skilled in the art can prepare the driving substrate according to any embodiment of the passive driving circuit and the active driving circuit, which is not limited in the embodiments of the present invention. On the basis of any of the above embodiments describing the method for manufacturing the driving substrate, two methods for manufacturing the transport substrate are provided below, and the description of the manufacturing of the driving substrate is omitted.

First, a method for manufacturing a first transfer substrate is described, fig. 16 is a schematic flow chart of a method for manufacturing a display panel according to another embodiment of the present invention, and further details the manufacturing of the transfer substrate are provided, and referring to fig. 16, the method for manufacturing a display panel may include the following steps:

and S510, providing a transfer substrate.

Fig. 17 to 19 are flow charts of the production of a transfer substrate corresponding to the production method shown in fig. 16. Referring to fig. 17, a transfer substrate 102 is provided, and the transfer substrate 102 is illustratively a transparent substrate that can be sized according to a desired display size.

S520, preparing a plurality of first through holes in the transfer substrate.

Referring to fig. 18, a plurality of first through holes 1021 is provided in the transport substrate 102. The number of the first through holes 1021 may be set according to a resolution of the display, and if the resolution is X × Y (RGB), the number of the first through holes is 2x × 3y. Specifically, the first through hole 1021 is disposed in the transport substrate 102 at a position corresponding to the first electrode 1012 and the second electrode 1023 of the light emitting diode 101.

S530, depositing electrode terminals in the first through hole, wherein the electrode terminals comprise a first electrode terminal and a second electrode terminal.

Referring to fig. 19, a first electrode terminal 103 and a second electrode terminal 105 are deposited in the first through hole 1021. Illustratively, a mask process may be used to deposit a metal, such as copper, in the first through hole 1021 to form the first electrode terminal 103 and the second electrode terminal 105.

And S540, transferring the plurality of light emitting diodes in a mode that the first electrode is aligned with the first electrode terminal and the second electrode is aligned with the second electrode terminal to obtain a transfer substrate.

Continuing with fig. 19, the light emitting diode can be transported by batch transport or single transport, for example, such that the first electrode 1012 is aligned with the first electrode terminal 103 and the second electrode 1013 is aligned with the second electrode terminal 105 to form a transport substrate.

And S550, providing a driving substrate and preparing a driving circuit on the driving substrate to obtain a driving substrate.

The fabrication of the driving substrate can refer to any embodiment of the passive driving circuit and the active driving circuit, and is not described herein again.

And S560, aligning the bonding transfer substrate and the driving substrate to obtain the diode display panel.

Fig. 20 is a schematic structural diagram of the transfer substrate and the driving substrate shown in fig. 19 after being bonded, and the driving circuit is taken as a passive driving circuit for example. Referring to fig. 20, the transfer substrate 100 and the driving substrate 200 may be specifically bonded by aligning the first electrode terminal 103 with the first connection electrode 202 and the second electrode terminal 105 with the second connection electrode 203.

Further, in order to achieve a good transparent display effect, optionally, the first connection electrode 202 and the second connection electrode 203 are both transparent electrodes, and the material of the transparent electrodes may be ITO (indium tin oxide), for example. In order to make the bonding between the first connection electrode 202 and the first electrode terminal 103 and between the second connection electrode 203 and the second electrode terminal 105 stronger, different from the material of the transparent electrode, before the bonding transport substrate 100 and the driving substrate 200 are aligned to obtain the diode display panel, a bonding metal 211 (see fig. 20) may be prepared on the surfaces of the first connection electrode 202 and the second connection electrode 203 on the side away from the driving substrate 201, and then the transport substrate 100 and the driving substrate 200 may be bonded to obtain the diode display panel in a manner that the first electrode terminal 103 and the second electrode terminal 105 are aligned to the bonding metal 211, respectively. Illustratively, the bonding metal 211 may be prepared using an electro-coppering process.

Similarly, the scan lines, the data lines, the voltage signal lines, the second connecting electrodes, and the second connecting electrode traces in the active driving circuit may also be made of transparent materials. In addition, the bonding metal can be adopted to ensure that the electrical connection between the structures which are bonded with each other is firmer, and the subsequent description is omitted.

The second method for producing a transfer substrate is described below. Fig. 21 is a schematic flow chart of a method for manufacturing a display panel according to another embodiment of the present invention, in which a transfer substrate is manufactured in a manner different from that of the above embodiment, and referring to fig. 21, the method for manufacturing a display panel may include the following steps:

s610, providing a transfer substrate, and preparing a bonding layer on the transfer substrate.

Fig. 22 to 23 are flow charts of the production of a transfer substrate corresponding to the production method shown in fig. 21. Referring to fig. 22, a bonding layer 104 is disposed on the transport substrate 102.

And S620, transferring the plurality of light-emitting diodes on the substrate base plate in a mode that the light-emitting structures face the bonding layer to obtain a transfer base plate.

Referring to fig. 23, the light emitting structure 1011 is adhered to the adhesive layer 104. In this embodiment, the light emitting diode 101 is flip-chip bonded to the transfer substrate 102, such that the first electrode 1012 and the second electrode 1013 are directly exposed, and the process is simpler.

S630, providing a driving substrate and preparing a driving circuit on the driving substrate to obtain a driving substrate.

And S640, aligning the bonding transfer substrate and the driving substrate to obtain the diode display panel.

The alignment method can be referred to fig. 8. In addition, referring to fig. 20, a bonding metal 211 may be prepared on a surface of the first connection electrode 202 and a surface of the second connection electrode 203 away from the driving substrate 201, and then the transfer substrate 100 and the driving substrate 200 may be bonded in a manner that the first electrode 1012 and the second electrode 1013 are respectively aligned with the bonding metal 211, so as to obtain a diode display panel.

Alternatively, after the alignment bonding of the transfer substrate 100 and the driving substrate 200 to obtain the diode display panel (S640), the transfer substrate 102 may be peeled off. Thus, the thickness of the display panel 10 can be reduced, and the transmittance can be increased.

It should be noted that, a person skilled in the art may select whether the transfer substrate 102 is retained according to needs, and the embodiment of the present invention is not limited thereto. The advantage of retaining the transfer substrate 102 is that it is convenient to achieve better attaching effect of the display panel through the transfer substrate, for example, when the display panel 10 is disposed between two layers of glass of a vehicle window, the display panel 10 can be ensured to be more firmly attached by attaching the transfer substrate 102 to the glass.

In summary, the above embodiments take the driving circuit as an example of passive driving and active driving, and how to prepare the connecting electrodes electrically connected to the light emitting diodes and the connecting electrode traces electrically connected to the connecting electrodes on the driving substrate are described in detail. Next, how to prepare a connection electrode electrically connected to the light emitting diode on the transfer substrate and prepare a connection electrode trace electrically connected to the connection electrode on the driving substrate will be described in detail.

Before describing the scheme of the present embodiment, it should be noted that, for convenience of distinction, in the present embodiment and the display panel embodiment corresponding to the manufacturing method of the present embodiment, different reference numerals are used for structures such as the substrate, the connection electrodes, the routing lines, and the binding terminals.

Fig. 24 is a schematic flow chart illustrating a method for manufacturing a display panel according to still another embodiment of the invention. Referring to fig. 24, the method for manufacturing the display panel may specifically include the following steps:

and S710, providing a transfer substrate.

S720, preparing a first connecting electrode and a second connecting electrode on one side of the transfer substrate.

And S730, transferring the plurality of light emitting diodes in a mode that the first electrode is aligned with the first connecting electrode and the second electrode is aligned with the second connecting electrode to obtain a transfer substrate.

Fig. 25 is a schematic top view of a display panel corresponding to the manufacturing method shown in fig. 24, and fig. 26 is a schematic structural view of a transfer substrate in the display panel shown in fig. 25. Referring to fig. 26, the transport substrate 301 is laminated on one side thereof with the first connection electrode 302 and the second connection electrode 303, the insulating layer 308 is disposed between the first connection electrode 302 and the second connection electrode 303, the first electrode 1012 of the light emitting diode is aligned with the first connection electrode 301 through the conductive electrode 3021, and the second electrode 1013 is aligned with the second connection electrode 303.

Alternatively, after the first connection electrode 302 and the second connection electrode 303 are prepared on the transfer substrate 301, referring to fig. 20, bonding metals are prepared on the surfaces of the first connection electrode 302 and the second connection electrode 303, and the first electrode 1012 and the first connection electrode 302 and the second electrode 1013 and the second connection electrode 303 are aligned by aligning the first electrode 1012 and the second electrode 1013 with the bonding metals, respectively, so as to more firmly electrically connect the first electrode 1012 with the first connection electrode 302 and the second electrode 1013 with the second connection electrode 303.

And S740, preparing the first connecting electrode wire, the second connecting electrode wire and the binding terminal in the second area.

Referring to fig. 25, the first connection electrode wire 402, the second connection electrode wire 403, and the binding terminal 404 are disposed within the second region Q2 of the driving substrate 401. The first connection electrode trace 402 and the second connection electrode trace 403 may be prepared by using the same mask process.

And S750, preparing a plurality of second through holes in the transfer substrate.

Referring to fig. 25, the transfer substrate 100 and the second region Q2 of the driving substrate 200 have an overlap region Q3, and the second through hole may be disposed in the overlap region. The number of the second through holes can be set according to the resolution of the display, and if the resolution is X × Y (RGB), the number of the second through holes is X +3Y. Specifically, the second through via hole is provided at a position corresponding to the positions of the first electrode terminal 305 and the second electrode terminal 306. This scheme of adoption can significantly reduce the quantity of running through the through-hole on the transportation substrate.

And S760, depositing connecting electrode terminals in the second through holes, wherein the connecting electrode terminals comprise a first connecting electrode terminal and a second connecting electrode terminal, the first connecting electrode terminal is electrically connected with the first connecting electrode, and the second connecting electrode terminal is electrically connected with the second connecting electrode.

Referring to fig. 25, the first connection electrode terminal 305 is electrically connected to the first connection electrode 302, and the second connection electrode terminal 306 is electrically connected to the second connection electrode 303. For example, to simplify the process, the second through via hole may be formed after the first and

second connection electrodes

302 and 303 are prepared, and thus, the bonding metal and the first and second

connection electrode terminals

305 and 306 on the surface layer of the connection electrode may be obtained under the same mask process.

Exemplarily, fig. 27 is a schematic cross-sectional structure of the display panel shown in fig. 25 taken along FF ', fig. 28 is a schematic cross-sectional structure of the display panel shown in fig. 25 taken along HH ', and fig. 29 is a schematic cross-sectional structure of the display panel shown in fig. 25 taken along II ', which shows the structure of the display panel in different viewing angles. Referring to fig. 27 to 29, the first connection electrode 302 and the second connection electrode 303 are located at different layers, and are isolated from each other by an insulating layer 308, the first connection electrode terminal 305 and the second connection electrode terminal 306 are both disposed at the same layer as the first connection electrode 302, the first connection electrode 302 is electrically connected to the first connection electrode trace 402 through the first connection electrode terminal 305, and the second connection electrode 303 is electrically connected to the second connection electrode trace 403 through the second connection electrode terminal 306. Thus, according to the technical solution of the present embodiment, the transfer substrate 100 and the driving substrate 200 can be bonded at one time only by aligning the connection electrode terminals on the transfer substrate 100 with the corresponding connection electrode traces, as detailed in S770.

And S770, bonding the transfer substrate and the driving substrate in a mode that the first connecting electrode terminal is aligned with the first connecting electrode wire and the second connecting electrode terminal is aligned with the second connecting electrode wire to obtain the diode display panel.

Optionally, in the above embodiment, the manufacturing method corresponding to the preparation of the connection electrode in the transfer substrate and the preparation of the connection electrode in the driving substrate is described by using the light emitting diode as the passive driving mode. The following briefly describes how to prepare the scan lines, the data lines, and the connection electrodes in the transfer substrate, and prepare the scan signal connection traces, the data signal connection traces, and the connection electrode traces in the driving substrate when the light emitting diode is in the active driving mode.

First, a manufacturing method corresponding to the active driving method of the "1T" structure will be explained.

Exemplarily, the light emitting diode includes a light emitting structure, and a first electrode and a second electrode disposed at one side of the light emitting structure;

the driving substrate comprises a first area and a second area, and the perpendicular projection of the transfer substrate on the plane of the driving substrate at least partially overlaps with the first area;

providing a transport substrate and transporting a plurality of light emitting diodes over the transport substrate, resulting in a transport substrate comprising:

providing a transfer substrate;

preparing a plurality of first scanning lines, a plurality of first data lines, a plurality of first transistors and a plurality of second connecting electrodes on one side of a transfer substrate, wherein the control end of each first transistor is electrically connected with the corresponding first scanning line, and the input end of each first transistor is electrically connected with the corresponding first data line;

transferring a plurality of light emitting diodes in a mode that a first electrode is aligned with the output end of a first transistor, and a second electrode is aligned with a second connecting electrode to obtain a transfer substrate;

providing a driving substrate and preparing a driving circuit on the driving substrate to obtain a driving substrate, comprising:

providing a driving substrate;

preparing a plurality of first scanning connecting wires, a plurality of first data connecting wires, a plurality of second connecting electrode wires and binding terminals in a second area of the driving substrate, wherein the binding terminals are arranged on one side of the second area far away from the first area, and driving chips are bound on the binding terminals; the binding terminals are respectively and electrically connected with the first scanning connection wire, the first data connection wire and the second connection electrode wire;

counterpoint bonding transport base plate and drive base plate obtain diode display panel, include:

preparing a plurality of third through vias in the transfer substrate;

depositing a first connecting structure in the third through hole, wherein the connecting structure comprises a first sub-connecting structure, a second sub-connecting structure and a third sub-connecting structure, the first sub-connecting structure is electrically connected with the first scanning line, the second sub-connecting structure is electrically connected with the first data line, and the third sub-connecting structure is electrically connected with the second connecting electrode;

and bonding the transfer substrate and the driving substrate in a manner that the first sub-connection structure is aligned with the first scanning connection wiring, the second sub-connection structure is aligned with the first data connection wiring, and the third sub-connection structure is aligned with the second connection electrode wiring to obtain the diode display panel.

Next, a manufacturing method corresponding to the active driving method of the "2T1C" structure will be described.

The light emitting diode comprises a light emitting structure, a first electrode and a second electrode, wherein the first electrode and the second electrode are arranged on one side of the light emitting structure;

the driving substrate comprises a first area and a second area, and a perpendicular projection of the transfer substrate on a plane where the driving substrate is located at least partially overlaps with the first area;

providing a transport substrate and transporting a plurality of light emitting diodes on the transport substrate, resulting in a transport substrate comprising:

providing a transfer substrate;

preparing a plurality of second scanning lines, a plurality of second data lines, a plurality of voltage signal lines, a plurality of second transistors, a plurality of third transistors, a plurality of storage capacitors and a plurality of second connecting electrodes on one side of a transfer substrate, wherein the control end of each second transistor is electrically connected with the corresponding second scanning line, the input end of each second transistor is electrically connected with the corresponding second data line, the output end of each second transistor is electrically connected with the control end of each third transistor and the first electrode plate of each storage capacitor, and the input end of each third transistor is electrically connected with the corresponding voltage signal line;

transferring the plurality of light emitting diodes in a mode that the first electrode is aligned with the output end of the third transistor and the second plate of the storage capacitor, and the second connecting electrode is aligned with the second electrode to obtain a transfer substrate;

providing a driving substrate;

preparing a plurality of second scanning connection wires, a plurality of second data connection wires, a plurality of voltage connection wires, a plurality of second connection electrode wires and binding terminals in a second region of the driving substrate, wherein the binding terminals are arranged on one side, far away from the first region, of the second region, and driving chips are bound on the binding terminals; the binding terminal is respectively and electrically connected with the second scanning connecting wire, the second data connecting wire and the voltage connecting wire;

preparing a plurality of fourth through vias in the transfer substrate;

depositing a second connecting structure in the fourth through hole, wherein the second connecting structure comprises a fourth sub-connecting structure, a fifth sub-connecting structure, a sixth sub-connecting structure and a seventh sub-connecting structure, the fourth sub-connecting structure is electrically connected with the second scanning line, the fifth sub-connecting structure is electrically connected with the second data line, the sixth sub-connecting structure is electrically connected with the voltage signal line, and the seventh sub-connecting structure is electrically connected with the second connecting electrode;

and bonding the transfer substrate and the driving substrate in a mode that the fourth sub-connecting structure is aligned with the second scanning connecting wires, the fifth sub-connecting structure is aligned with the second data connecting wires, the sixth sub-connecting structure is aligned with the voltage connecting wires, and the seventh sub-connecting structure is aligned with the second connecting electrode wires to obtain the diode display panel.

It should be noted that the preparation method for the active driving type driving circuit in the transfer substrate is basically the same as the preparation method for the active driving type driving circuit in the driving substrate, and the difference is only that the active driving type driving circuit is specifically prepared on the transfer substrate or the driving substrate, and the connection trace corresponding to the second region needs to be connected through a punching process.

Based on the same inventive concept, an embodiment of the present invention further provides a display panel, which can be manufactured by any embodiment of the above manufacturing method, and therefore, the display panel provided by the embodiment of the present invention has the technical effect of the technical solution in any embodiment, and the explanation of the structure and the terminology which are the same as or corresponding to those in the embodiment of the above manufacturing method is not repeated herein.

Referring to fig. 3 and 4, the display panel includes a transfer substrate 100 and a driving substrate 200, and the transfer substrate 100 is connected to the driving substrate 200 in alignment; the transfer substrate 100 includes a transfer substrate 102 and a plurality of light emitting diodes 101 transferred onto the transfer substrate 102; the drive substrate 200 includes a drive substrate 201 and a drive circuit provided on the drive substrate 201 on the side facing the transfer substrate 100. According to the display panel provided by the embodiment of the invention, the large-size diode display panel is obtained by once aligning and bonding the transfer substrate and the driving substrate, and the transparent display of the large-size display panel is realized.

Optionally, in the display panel provided in the embodiment of the present invention, the connection electrodes and the connection electrode traces may be both located on the driving substrate, or the connection electrodes are located in the transfer substrate, and the connection electrode traces are located in the driving substrate; further, the driving method of the light emitting diode may be passive driving or active driving, and different structures of the display panel are described below.

First, the connection electrode and the connection electrode trace are both located on the driving substrate, and the driving manner of the light emitting diode is passively driven.

Referring to fig. 4 to 8, the light emitting diode 101 includes a light emitting structure 1011 and first and

second electrodes

1012 and 1013 disposed at one side of the light emitting structure 1011; the driving substrate 201 comprises a first area Q1 and a second area Q2, and the perpendicular projection of the transfer substrate 100 on the plane of the driving substrate 201 at least partially overlaps the first area Q1; the driving substrate 200 further includes a first connection electrode 202 and a second connection electrode 203 stacked on the first region Q1 of the driving substrate 201, a first connection electrode trace 204, a second connection electrode trace 205 and a binding terminal 206 disposed on the second region Q2 of the driving substrate 201; the first connection electrode wire 204 is electrically connected to the first connection electrode 202 and the binding terminal 206, respectively, and the second connection electrode wire 205 is electrically connected to the second connection electrode 203 and the binding terminal 206, respectively; the first electrode 1012 is connected to the first connection electrode 202 in alignment, and the second electrode 1013 is connected to the second connection electrode 203 in alignment.

Further, the first connection electrode 202 and the first connection electrode trace 204 are disposed on the same layer; the second connection electrode 203 and the second connection electrode trace 205 are arranged on the same layer; alternatively, the first connection electrode 202, the first connection electrode trace 204, and the second connection electrode trace 205 are disposed in the same layer; alternatively, the second connection electrode 203, the first connection electrode wire 204, and the second connection electrode wire 205 are disposed at the same layer. Therefore, the connecting electrodes and the connecting electrode wires are arranged on the driving substrate, part of the connecting electrodes and part of the connecting electrode wires can be arranged on the same layer, and masks are formed in the same process, so that the driving substrate is simple in structure, and the preparation process is simple.

Next, the connection electrode and the connection electrode trace are both located on the driving substrate, and the driving manner of the light emitting diode is actively driven.

Referring to the driving circuit shown in fig. 9, alternatively, the light emitting diode 101 includes a light emitting structure 1011 and a first electrode 1012 and a second electrode 1013 disposed on one side of the light emitting structure 1011; the driving substrate 201 comprises a first area Q1 and a second area Q2, and the perpendicular projection of the transfer substrate 100 on the plane of the driving substrate 201 at least partially overlaps the first area Q1; the first region Q1 of the driving substrate 201 is provided with a plurality of first scan lines G1, a plurality of first data lines S1, a plurality of first transistors T1, and a plurality of second connection electrodes 203, a control terminal of the first transistor T1 is electrically connected to the first scan line G1 corresponding thereto, and an input terminal of the first transistor T1 is electrically connected to the first data line S1 corresponding thereto; a second region Q2 of the driving substrate 201 is provided with a plurality of first scanning connection lines, a plurality of first data connection lines, a plurality of second connection electrode lines and binding terminals; the first scanning connection wire is respectively and electrically connected with the first scanning line and the binding terminal, the first data connection wire is respectively and electrically connected with the first data line and the binding terminal, and the second connection electrode wire is respectively and electrically connected with the second connection electrode and the binding terminal 206; the first electrode 1012 is connected to the output terminal of the first transistor T1 in alignment, and the second electrode 1013 is connected to the second connection electrode 203 in alignment.

Referring to fig. 3 and 13 to 15, alternatively, the light emitting diode 101 includes a light emitting structure 1011 and first and second electrodes 1012 and 1013 disposed at one side of the light emitting structure 1011; the driving substrate 201 comprises a first area Q1 and a second area Q2, and the perpendicular projection of the transfer substrate 100 on the plane of the driving substrate 201 at least partially overlaps the first area Q1; the first region Q1 of the driving substrate 201 is provided with a plurality of second scanning lines G2, a plurality of second data lines S2, a plurality of voltage signal lines PVDD, a plurality of second transistors T2, a plurality of third transistors T3, a plurality of storage capacitors C, and a plurality of second connection electrodes 203, the control terminal 211 of the second transistor T2 is electrically connected to the second scanning line G2 corresponding thereto, the input terminal 222 of the second transistor T2 is electrically connected to the second data line S2 corresponding thereto, the output terminal 223 of the second transistor T2 is electrically connected to the control terminal 231 of the third transistor T3 and the first plate 241 of the storage capacitor C, and the input terminal 232 of the third transistor T3 is electrically connected to the voltage signal line PVDD corresponding thereto; the second region Q2 of the driving substrate 201 is provided with a plurality of second scanning connection lines, a plurality of second data connection lines, a plurality of voltage connection lines, a plurality of second connection electrode lines and binding terminals; the second scanning connecting wire is respectively and electrically connected with the second scanning line G2 and the binding terminal, the second data connecting wire is respectively and electrically connected with the second data line S2 and the binding terminal, the voltage connecting wire is respectively and electrically connected with the voltage signal line PVDD and the binding terminal, and the second connecting electrode wire (PVEE signal line) is respectively and electrically connected with the second connecting electrode 203 and the binding terminal; the first electrode 1012 is connected to the output terminal 233 of the third transistor T3 in a position-aligned manner, and the second electrode 1013 is connected to the second connection electrode 203 in a position-aligned manner.

The above embodiments are two possible active driving manners to illustrate the specific structure of the display panel, which are respectively the "1T" active driving structure and the "2T1C" active driving structure. The driving mode of the light emitting diode in the display panel provided by the embodiment of the invention can be passive driving or active driving, and the driving mode is various and is suitable for different driving conditions.

On the basis of the above-described embodiments, specific structures of the transfer substrate will be described below in two possible cases.

Referring to fig. 18 to 19, optionally, the transfer substrate 100 further includes a plurality of first through holes 1021 in the transfer substrate 102 and electrode terminals located in the first through holes 1021, the electrode terminals including a first electrode terminal 103 and a second electrode terminal 105; the first electrode 1012 is aligned with the first electrode terminal 103, and the second electrode 1013 is aligned with the second electrode terminal 105.

Referring to fig. 22 to 23, the transfer substrate 100 further includes an adhesive layer 104 on a surface of one side of the transfer substrate 102, and the light emitting diode 101 is adhesively disposed on the side of the transfer substrate 102 with the light emitting structure 1011 facing the adhesive layer 104.

In the display panel provided in the embodiment of the present invention, the transfer substrate may include different structures, and the specific structure of the transfer substrate is not limited in the embodiment of the present invention.

Next, the connection electrode is disposed on the transfer substrate, and the connection electrode trace is disposed on the driving substrate.

Referring to fig. 25, alternatively, the light emitting diode 101 includes a light emitting structure 1011 and first and second electrodes 1012 and 1013 disposed at one side of the light emitting structure 1011; the driving substrate 401 includes a first area Q1 and a second area Q2, and a perpendicular projection of the transfer substrate 100 on a plane where the driving substrate 401 is located at least partially overlaps with the first area Q1; the transfer substrate 100 includes a transfer substrate 301, and a first connection electrode 302 and a second connection electrode 303 which are stacked on one side of the transfer substrate 301; the first electrode 1012 is connected to the first connection electrode 302 in alignment, and the second electrode 1013 is connected to the second connection electrode 303 in alignment; the driving substrate 200 includes a driving substrate 401, and a first connection electrode trace 402, a second connection electrode trace 403 and a binding terminal 404 disposed in a second region Q2 of the driving substrate 401, wherein a driving chip is bound in the binding terminal 404; the transfer substrate 100 further includes a plurality of second through holes in the transfer substrate 301 and connection electrode terminals located within the second through holes; the connection electrode terminals include a first connection electrode terminal 305 and a second connection electrode terminal 306, the first connection electrode terminal 305 being electrically connected with the first connection electrode 302, the second connection electrode terminal 306 being electrically connected with the second connection electrode 303; the first connecting electrode terminal 305 is connected to the first connecting electrode trace 402 in alignment, and the second connecting electrode terminal 306 is connected to the second connecting electrode trace 403 in alignment.

The above embodiment only exemplifies the specific structure of the display panel when the connection electrode is located on the transfer substrate by the passive driving method. The structure of the display panel when the led is actively driven will be briefly described below.

First, a configuration corresponding to the active drive method of the "1T" configuration will be described.

the transfer substrate comprises a transfer substrate, a plurality of first scanning lines, a plurality of first data lines, a plurality of first transistors and a plurality of second connecting electrodes, the plurality of first scanning lines, the plurality of first data lines, the plurality of first transistors and the plurality of second connecting electrodes are arranged on one side of the transfer substrate, the control ends of the first transistors are electrically connected with the corresponding first scanning lines, and the input ends of the first transistors are electrically connected with the corresponding first data lines;

the first electrode is connected with the output end of the first transistor in an antiposition mode, and the second electrode is connected with the second connecting electrode in an antiposition mode;

the driving circuit comprises a plurality of first scanning connecting wires, a plurality of first data connecting wires, a plurality of second connecting electrode wires and binding terminals, wherein the first scanning connecting wires, the first data connecting wires, the second connecting electrode wires and the binding terminals are positioned in a second area of the driving substrate; the binding terminals are respectively and electrically connected with the first scanning connecting wire, the first data connecting wire and the second connecting electrode wire;

a plurality of third through holes are formed in the transfer substrate; a first connecting structure is formed in the third through hole and comprises a first sub-connecting structure, a second sub-connecting structure and a third sub-connecting structure, the first sub-connecting structure is electrically connected with the first scanning line, the second sub-connecting structure is electrically connected with the first data line, and the third sub-connecting structure is electrically connected with the second connecting electrode;

the first sub-connection structure is connected with the first scanning connection wiring in an alignment mode, the second sub-connection structure is connected with the first data connection wiring in an alignment mode, and the third sub-connection structure is connected with the second connection electrode wiring in an alignment mode.

Next, a configuration corresponding to the active drive method of the "2T1C" configuration will be described.

the transfer substrate comprises a transfer substrate, a plurality of second scanning lines, a plurality of second data lines, a plurality of voltage signal lines, a plurality of second transistors, a plurality of third transistors, a plurality of storage capacitors, a plurality of second connecting electrodes and a plurality of control ends of the second transistors are electrically connected with the corresponding second scanning lines, input ends of the second transistors are electrically connected with the corresponding second data lines, output ends of the second transistors are electrically connected with control ends of the third transistors and first electrode plates of the storage capacitors, and input ends of the third transistors are electrically connected with the corresponding voltage signal lines;

the first electrode is connected with the output end of the third transistor and the second plate of the storage capacitor in an alignment way, and the second connecting electrode is connected with the second electrode in an alignment way;

the driving circuit comprises a plurality of second scanning connecting wires, a plurality of second data connecting wires, a plurality of voltage connecting wires, a plurality of second connecting electrode wires and binding terminals, wherein the second scanning connecting wires, the second data connecting wires, the voltage connecting wires, the second connecting electrode wires and the binding terminals are positioned in a second area of the driving substrate; the binding terminal is respectively and electrically connected with the second scanning connection wire, the second data connection wire, the voltage connection wire and the second connection electrode wire;

a plurality of fourth through holes are formed in the transfer substrate; a second connection structure is arranged in the fourth through hole and comprises a fourth sub-connection structure, a fifth sub-connection structure, a sixth sub-connection structure and a seventh sub-connection structure, the fourth sub-connection structure is electrically connected with the second scanning line, the fifth sub-connection structure is electrically connected with the second data line, the sixth sub-connection structure is electrically connected with the voltage signal line, and the seventh sub-connection structure is electrically connected with the second connection electrode;

the fourth sub-connection structure is connected with the second scanning connection wiring in an alignment mode, the fifth sub-connection structure is connected with the second data connection wiring in an alignment mode, the sixth sub-connection structure is connected with the voltage connection wiring in an alignment mode, and the seventh sub-connection structure is connected with the second connection electrode wiring in an alignment mode.

It should be noted that the structure of the active driving type driving circuit in the transfer substrate is substantially the same as the structure of the active driving type driving circuit in the driving substrate, and the differences only include whether the active driving type driving circuit is specifically disposed on the transfer substrate or the driving substrate, and the specific connection relationship between the connection traces corresponding to the second region and the connection electrodes, which are not described herein again, and reference may be made to the structure of the active driving type driving circuit disposed in the driving substrate.

Optionally, the first connection electrode 202 and the second connection electrode 203 are both transparent electrodes; the first connection electrode trace 204 and the second connection electrode trace 205 are both transparent traces to achieve a good transparent display effect.

Referring to fig. 20, optionally, the driving substrate 200 further includes a bonding metal 211 on a surface of the first and

second connection electrodes

202 and 203 away from the driving substrate 201, and the first and

second electrodes

1012 and 1013 are respectively aligned with the bonding metal 211, so that the first and second electrodes are electrically connected to the first and second connection electrodes more firmly.

Based on the same inventive concept, an embodiment of the present invention further provides a display device, for example, fig. 30 is a schematic structural diagram of the display device provided in the embodiment of the present invention, and referring to fig. 30, the display device 20 includes the display panel 10 according to any embodiment of the present invention, so that the display device provided in the embodiment of the present invention has the technical effects of the technical solutions in any embodiment described above, and the explanations of the structures and terms that are the same as or corresponding to the embodiments described above are not repeated herein. The display device provided in the embodiment of the present invention may be a vehicle-mounted display as shown in fig. 20, or may be any electronic product having a large-area transparent display function, which is not limited in the embodiment of the present invention.

With continued reference to fig. 30, the display device 20 further includes a first transparent substrate 500 and a second lens substrate 600, and the transfer substrate 100 and the driving substrate 200 are disposed between the first transparent substrate 500 and the second transparent substrate 600.

Illustratively, the first transparent substrate 500 and the second transparent substrate 600 may be two-layer glass substrates of a vehicle window, and a transparent display may be implemented on the vehicle window by disposing the transfer substrate 100 and the driving substrate 200 bonded in alignment between the first transparent substrate 500 and the second transparent substrate 600.

Fig. 31 is a schematic structural diagram of a display device according to still another embodiment of the present invention, and referring to fig. 31, the display device 20 further includes a transparent encapsulating adhesive 700 disposed between the first transparent substrate 500 and the second transparent substrate 600, and the transparent encapsulating adhesive is used to fill a gap between the transfer substrate 100 and the driving substrate 200 and the first transparent substrate 500 and/or the second transparent substrate 600.

In this embodiment, through setting up transparent encapsulation glue 700, improved the stability of transporting base plate 100 and drive base plate 200, avoid leading to transporting base plate 100 and drive base plate 200 to become flexible because of there being the hole.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that the features of the various embodiments of the invention may be partially or fully coupled or combined with each other and may be coordinated with each other and technically driven in various ways. Numerous variations, rearrangements, combinations, and substitutions will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, comprising:

a first substrate, a driving electrode disposed at one side of the first substrate;

a second substrate disposed opposite to the first substrate, the second substrate having a plurality of through holes, and a plurality of electrode terminals filled in the through holes, the plurality of electrode terminals including a first electrode terminal and a second electrode terminal;

the light emitting diode is arranged on one side of the second substrate and comprises a light emitting structure, a first electrode and a second electrode, wherein the first electrode and the second electrode are arranged on one side of the light emitting structure;

the first electrode is electrically connected to the first electrode terminal, and the second electrode is electrically connected to the second electrode terminal.

2. The display panel according to claim 1, wherein the first substrate includes a first region and a second region, the first region is provided with a first connection electrode and a second connection electrode, the second region is provided with a first connection electrode wire, a second connection electrode wire and a binding terminal, the first connection electrode wire is electrically connected to the first connection electrode and the binding terminal, the second connection electrode wire is electrically connected to the second connection electrode and the binding terminal, the first electrode is electrically connected to the first connection electrode, and the second electrode is electrically connected to the second connection electrode.

3. The display panel according to claim 2, wherein the first connection electrodes are disposed in the same layer as the first connection electrode traces; the second connecting electrode and the second connecting electrode are arranged in the same layer;

or the first connecting electrode, the first connecting electrode wire and the second connecting electrode wire are arranged in the same layer;

or the second connection electrode, the first connection electrode wire and the second connection electrode wire are arranged on the same layer.

4. The display panel according to claim 1, wherein the first substrate includes a first region and a second region;

a plurality of first scanning lines, a plurality of first data lines, a plurality of first transistors and a plurality of second connecting electrodes are arranged in the first area, the control end of each first transistor is electrically connected with the corresponding first scanning line, and the input end of each first transistor is electrically connected with the corresponding first data line;

arranging a plurality of first scanning connecting wires, a plurality of first data connecting wires, a plurality of second connecting electrode wires and binding terminals in the second area; the first scanning connection wire is electrically connected with the first scanning line and the binding terminal respectively, the first data connection wire is electrically connected with the first data line and the binding terminal respectively, and the second connection electrode wire is electrically connected with the second connection electrode and the binding terminal respectively;

the first electrode is connected with the output end of the first transistor, and the second electrode is connected with the second connecting electrode.

5. The display panel according to claim 1, wherein the first substrate includes a first region and a second region;

providing a plurality of second scan lines, a plurality of second data lines, a plurality of voltage signal lines, a plurality of second transistors, a plurality of third transistors, a plurality of storage capacitors, and a plurality of second connection electrodes in the first region, wherein control terminals of the second transistors are electrically connected to the second scan lines corresponding thereto, input terminals of the second transistors are electrically connected to the second data lines corresponding thereto, output terminals of the second transistors are electrically connected to control terminals of the third transistors and first plates of the storage capacitors, and input terminals of the third transistors are electrically connected to the voltage signal lines corresponding thereto;

arranging a plurality of second scanning connecting wires, a plurality of second data connecting wires, a plurality of voltage connecting wires, a plurality of second connecting electrode wires and binding terminals in the second area; the second scanning connection wire is electrically connected with the second scanning line and the binding terminal respectively, the second data connection wire is electrically connected with the second data line and the binding terminal respectively, the voltage connection wire is electrically connected with the voltage signal line and the binding terminal respectively, and the second connection electrode wire is electrically connected with the second connection electrode and the binding terminal respectively;

the first electrode is connected to an output terminal of the third transistor in an aligned manner, and the second electrode is connected to the second connection electrode in an aligned manner.

6. The display panel according to claim 2, wherein the first connection electrode and the second connection electrode are both transparent electrodes.

7. The display panel according to claim 6, wherein the first connection electrode trace and the second connection electrode trace are both transparent traces.

8. The display panel according to claim 7, wherein the first substrate further comprises a bonding metal on a surface of the first connection electrode and the second connection electrode on a side away from the first substrate, and the first electrode and the second electrode are respectively connected to the bonding metal in a position-to-position manner.

9. The display panel according to claim 1, wherein the first electrode terminal and the second electrode terminal overlap with the light emitting diode, and wherein the light emitting diode overlaps with the through via.

10. The display panel according to claim 2, wherein the first connection electrode is connected to the first electrode terminal, the second connection electrode is connected to the second electrode terminal, and the first connection electrode and the second connection electrode respectively overlap the corresponding through via.

11. The display panel according to claim 10, wherein the first substrate and the second substrate have an overlapping region, and the through via is located in the overlapping region.

12. The display panel according to claim 1, further comprising a driving chip disposed in a region of the first substrate beyond the second substrate.

13. A display device characterized by comprising the display panel according to any one of claims 1 to 12.

14. The display device according to claim 13, further comprising a first transparent substrate and a second transparent substrate;

the first substrate and the second substrate are disposed between the first transparent substrate and the second transparent substrate.

15. The display device according to claim 14, further comprising a transparent encapsulation adhesive disposed between the first transparent substrate and the second transparent substrate, the transparent encapsulation adhesive being configured to fill a gap between the transfer substrate and the driving substrate and the first transparent substrate and/or the second transparent substrate.