CN111048568B

CN111048568B - Display panel and display device

Info

Publication number: CN111048568B
Application number: CN201911355523.7A
Authority: CN
Inventors: 戴文君; 邢亮; 吴天一
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2022-06-03
Anticipated expiration: 2039-12-25
Also published as: CN111048568A

Abstract

The invention discloses a display panel and a display device, which relate to the technical field of display, wherein the display panel comprises: a substrate; the light-emitting element is arranged on the substrate and comprises a first electrode and a second electrode, the first electrode and the second electrode are positioned on one side of the light-emitting element, which is far away from the substrate, and the light-emitting element emits light towards the substrate side; the first voltage end and the second voltage end are positioned on one sides of the first electrode and the first electrode facing the substrate; the first connecting electrode and the second connecting electrode are positioned on one sides of the first electrode and the second electrode, which are far away from the light-emitting element; the first connecting electrode is electrically connected with the first electrode and the first voltage end, and the second connecting electrode is electrically connected with the second electrode and the second voltage end. The light-emitting element emits light towards the substrate, the frameless design of the display panel is realized, the aperture opening ratio of the display panel and the display device is improved, and seamless splicing between the display panels is facilitated.

Description

Display panel and display device

Technical Field

The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.

Background

From the CRT (Cathode Ray Tube) era to the liquid crystal era and now to the OLED (Organic Light-Emitting Diode) era, the display industry has been developing over decades. The display industry is closely related to our lives, and display technologies cannot be separated from traditional mobile phones, flat panels, televisions and PCs, to current intelligent wearable devices and VRs.

With the development of science and technology, display panels have increasingly tended to narrow bezel designs in order to improve screen occupation ratio. The display panel in the prior art is usually provided with a frame area and a display area, the frame area of the display panel usually needs to be provided with components such as a driving chip or other peripheral components, and the existence of these components makes the frame of the display panel unable to be further narrowed, and more difficult to realize a frameless design.

Disclosure of Invention

In view of this, the present application provides a display panel and a display device, in which the light emitting element emits light toward the substrate, so that the frameless design of the display panel and the display device is realized, the aperture opening ratio of the display panel and the display device is greatly improved, and the seamless splicing of a plurality of display panels is facilitated.

The application has the following technical scheme:

in a first aspect, the present application provides a display panel comprising:

a substrate;

a light emitting element disposed on the substrate, the light emitting element including a first electrode and a second electrode, the first electrode and the second electrode being located on a side of the light emitting element facing away from the substrate, the light emitting element emitting light toward the substrate side;

a first voltage terminal and a second voltage terminal, the first voltage terminal and the second voltage terminal being located at a side of the first electrode and the first electrode facing the substrate;

a first connection electrode and a second connection electrode which are located on a side of the first electrode and the second electrode facing away from the light emitting element; wherein

The first connecting electrode is electrically connected with the first electrode and the first voltage end, and the second connecting electrode is electrically connected with the second electrode and the second voltage end.

In a second aspect, the present application further provides a display device including the display panel provided by the present application.

Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:

in the display panel and the display device provided by the application, the light emitting element emits light towards the substrate side, namely, the light emitting element adopts bottom light emitting arrangement. The first electrode and the second electrode which are used for providing a light-emitting power supply for the light-emitting element are arranged on one side of the light-emitting element, which is far away from the substrate, the first connecting electrode and the second connecting electrode are introduced on one side of the first electrode and the second electrode, the first connecting electrode is respectively electrically connected with the first electrode and the first voltage end, and the second connecting electrode is respectively electrically connected with the second electrode and the second voltage end. Because the light-emitting element adopts a bottom light-emitting structure, the first connecting electrode and the second connecting electrode are arranged on one side of the first electrode and the second electrode, which is deviated from the light-emitting element, so that the driving circuit board can also be arranged on one side of the light-emitting element, which is far away from the substrate, and a frame area does not need to be additionally arranged on the display panel, thereby realizing the frameless design of the display panel and the display device. In addition, when a plurality of display panels need to be spliced, seamless splicing effect can be achieved between the display panels with the frameless design.

Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a top view of a display panel provided in the prior art;

fig. 2 is a top view of a display panel according to an embodiment of the present disclosure;

FIG. 3 is an AA' cross-sectional view of the display panel of the embodiment of FIG. 2;

FIG. 4 is a schematic diagram of the connection of the first voltage terminal and the second voltage terminal to the substrate;

fig. 5 is a cross-sectional view of a light emitting device in a display panel according to an embodiment of the disclosure;

fig. 6 is a top view of a light emitting device in a display panel according to an embodiment of the present disclosure;

FIG. 7 is a BB' cross-sectional view of the light emitting device of FIG. 6;

FIG. 8 is a cross-sectional view of another BB' of the light emitting device of FIG. 6;

FIG. 9 is another BB' cross-sectional view of the light emitting device of FIG. 6;

fig. 10 is a top view of another light emitting device in a display panel according to an embodiment of the present disclosure;

FIG. 11 is a cross-sectional view of a CC' of the light emitting device of FIG. 10;

FIG. 12 is another cross-sectional view AA' of the display panel of the embodiment of FIG. 2;

FIG. 13 is a cross-sectional view of a display panel including bonding electrodes according to the present application;

fig. 14 is a schematic diagram illustrating a pixel circuit in a display panel according to an embodiment of the present disclosure;

fig. 15 is a top view of a display device according to an embodiment of the present disclosure.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.

Fig. 1 is a top view of a display panel 300 provided in the prior art, the display panel includes a display area 301 and a non-display area 302 surrounding the display area 301, the non-display area 302 is used for disposing a driving chip 303 or other peripheral components, and due to the existence of these components, it is difficult to further narrow a frame area of the display panel 300, and it is more difficult to implement a frameless design. When two or more display panels need to be spliced to form a larger display panel assembly, the frame between the adjacent display panels forms an obvious splicing seam to influence the whole display effect.

In view of this, the present application provides a display panel and a display device, in which the light emitting element emits light toward the substrate, so that the frameless design of the display panel and the display device is implemented, the aperture opening ratios of the display panel and the display device are greatly improved, and the seamless splicing of a plurality of display panels is facilitated.

Fig. 2 is a top view of a display panel provided in an embodiment of the present application, fig. 3 is an AA' cross-sectional view of the display panel provided in the embodiment of fig. 2, please refer to fig. 2 and fig. 3, a display panel 100 provided in the present application includes:

a substrate 10;

the light-emitting element 20, the light-emitting element 20 is disposed on the substrate 10, the light-emitting element 20 includes a first electrode 21 and a second electrode 22, the first electrode 21 and the second electrode 22 are located on a side of the light-emitting element 20 away from the substrate 10, and the light-emitting element 20 emits light toward the substrate 10; alternatively, the light emitting element 20 provided in the present application may be, for example, a Micro LED, or other feasible self-light emitting structures;

a first voltage terminal 31 and a second voltage terminal 32, the first voltage terminal 31 and the second voltage terminal 32 being located at a side of the first electrode 21 and the first electrode 21 facing the substrate 10;

a first connection electrode 41 and a second connection electrode 42, the first connection electrode 41 and the second connection electrode 42 being located on a side of the first electrode 21 and the second electrode 22 facing away from the light emitting element 20; wherein

The first connection electrode 41 electrically connects the first electrode 21 with the first voltage terminal 31, and the second connection electrode 42 electrically connects the second electrode 22 with the second voltage terminal 32.

Fig. 3 illustrates only a cross-sectional view of the display panel 100, which shows only a relative positional relationship among the substrate 10, the light emitting element 20, the first and

second voltage terminals

31 and 32, and the first and

second connection electrodes

41 and 42, and does not represent the actual number and size of the film layers. In fact, fig. 3 does not show the detailed film structure of the substrate 10, and thus does not represent the actual film structure of the substrate. Alternatively, the light emitting element 20 may be fixed to the substrate 10 by bonding, for example, by heat-resistant transparent optical adhesive.

Specifically, with continued reference to fig. 2 and 3, the present application provides a display panel 100 in which the light emitting elements 20 emit light toward the substrate 10 side, i.e., the light emitting elements 20 are in a bottom emission arrangement. The first electrode 21 and the second electrode 22 of the light emitting element 20 for supplying the light emitting power thereto are disposed on the side of the light emitting element 20 facing away from the substrate 10, a first connection electrode 41 and a second connection electrode 42 are introduced on the sides of the first electrode 21 and the second electrode 22 facing away from the light emitting element 20, the first connection electrode 41 being electrically connected to the first electrode 21 and the first voltage terminal 31, respectively, the second connection electrode 42 being electrically connected to the second electrode 22 and the second voltage terminal 32, respectively, thus, the voltage signal provided by the first voltage terminal 31 can be transmitted to the first electrode 21 through the first connecting electrode 41, the voltage signal provided by the second voltage terminal 32 can be transmitted to the second electrode 22 through the second connecting electrode 42, thereby, the first voltage terminal 31 and the second voltage terminal 32 supply the first electrode 21 and the second electrode 22 of the light emitting element 20 so that the light emitting element 20 emits light. Since the light emitting element 20 adopts a bottom emission structure, the first connection electrode 41 and the second connection electrode 42 are disposed on the sides of the first electrode 21 and the second electrode 22 away from the light emitting element 20, so that the driving circuit board can also be disposed on the side of the light emitting element 20 away from the substrate without additionally disposing a frame region on the display panel 100, thereby realizing the frameless design of the display panel 100. In addition, when a plurality of display panels 100 need to be spliced, seamless splicing effect can be achieved between the display panels 100 with the frameless design.

In an alternative embodiment of the present invention, fig. 4 is a schematic diagram illustrating the connection between the first voltage terminal 31 and the second voltage terminal 32 and the substrate 10.

Specifically, with continued reference to fig. 4, the present application provides a display panel 100 in which the first voltage terminal 31 and the second voltage terminal 32 are located on the side of the first electrode 21 and the second electrode 22 facing the substrate 10. The substrate includes an array layer, the array layer is provided with a switch transistor T1 and a driving transistor T2, the voltage signals of the first voltage terminal 31 and the second voltage terminal 32 are provided by the array layer in the substrate 10, when the first voltage terminal 31 and the second voltage terminal 32 are provided at the side of the first electrode 21 and the second electrode 22 facing the substrate 10, so that the first voltage terminal 31/the second voltage terminal 32 is positioned between the array layer and the first electrode 21/the second electrode 22 in a direction perpendicular to the substrate, facilitates both the electrical connection of the first voltage terminal 31/the second voltage terminal 32 with the first connection electrode 41/the second connection electrode 42 and the electrical connection of the first voltage terminal 31/the second voltage terminal 32 with the array layer, while reliable electrical signal transmission is achieved, it is also beneficial to simplify the film connection relationship of the display panel 100.

In an alternative embodiment of the present invention, referring to fig. 3 and 4, the display panel 100 further includes a planarization layer 50, the planarization layer 50 is disposed between the film layers of the first voltage terminal 31 and the second voltage terminal 32 and the film layers of the first connection electrode 41 and the second connection electrode 42, and the planarization layer 50 covers the light emitting element 20.

Specifically, with continued reference to fig. 3 and 4, in the present application, a flat layer 50 is introduced between the film layers where the first voltage terminal 31 and the second voltage terminal 32 are located and the film layers where the first connection electrode 41 and the second connection electrode 42 are located, the flat layer 50 covers the light emitting element 20, the flat layer 50 can reliably fix the light emitting element 20, effectively prevent the light emitting element 20 from loosening and even falling off, and simultaneously protect the light emitting element 20. In addition, the arrangement of the planarization layer 50 in the present application can further encapsulate the first voltage terminal 31 and the second voltage terminal 32 inside the planarization layer 50, so that the planarization layer 50 can protect the first voltage terminal 31 and the second voltage terminal 32, thereby facilitating to improve the reliability and stability of the voltage signals transmitted from the first voltage terminal 31 and the second voltage terminal 32 to the light emitting element 20.

In an alternative embodiment of the present invention, fig. 5 is a cross-sectional view of a light emitting element 20 in a display panel 100 provided in an embodiment of the present application, which shows a relative position relationship between a single light emitting element 20 and other film structures.

Specifically, with continued reference to fig. 5, the first connection electrode 41 is connected to the first electrode 21 through a first via hole 51, and the second connection electrode 42 is connected to the second electrode 22 through a second via hole 52. Because the first connection electrode 41 and the second connection electrode 42 are located on the sides of the first electrode 21 and the second electrode 22 away from the substrate, the first connection electrode 41 and the second connection electrode 42 are isolated from the first electrode 21 and the second electrode 22 by the flat layer 50, and the first via hole 51 and the second via hole 52 are formed on the flat layer 50, the electrical connection between the first connection electrode 41 and the first electrode 21 and the electrical connection between the second connection electrode 42 and the second electrode 22 can be respectively realized, and the electrical connection reliability between the first connection electrode 41 and the first electrode 21 and the electrical connection reliability between the second connection electrode 42 and the second electrode 22 can be improved by adopting a via hole connection mode.

In an alternative embodiment of the present invention, with continued reference to fig. 5, the first connection electrode 41 is connected to the first voltage terminal 31 through a third via 53, and the second connection electrode 42 is connected to the second voltage terminal 32 through a fourth via 54.

Specifically, with continued reference to fig. 5, since the planarization layer 50 is disposed between the film layers where the first voltage terminal 31 and the second voltage terminal 32 are located and the film layers where the first connection electrode 41 and the second connection electrode 42 are located, when the third via hole 53 and the fourth via hole 54 are formed on the planarization layer 50, the first connection electrode 41 can be electrically connected to the first voltage terminal 31 through the third via hole 53, and the second connection electrode 42 can be electrically connected to the second voltage terminal 32 through the fourth via hole 54, the reliability of electrical connection between the first connection electrode 41 and the first voltage terminal 31 can be improved by using the via connection, and the reliability of electrical connection between the second connection electrode 42 and the second voltage terminal 32 can be improved, so that the first voltage terminal 31 and the second voltage terminal 32 can reliably transmit voltage signals to the first connection electrode 41 and the second connection electrode 42, so that the light emitting element 20 reliably emits light.

In an alternative embodiment of the present invention, fig. 6 is a top view of a light emitting element 20 in the display panel 100 provided in the embodiment of the present application, fig. 7 is a BB' cross-sectional view of the light emitting element 20 in fig. 6, and fig. 6 and 7 show a case where the first groove 70 is provided at a peripheral edge of the light emitting element 20.

Specifically, referring to fig. 6 and 7, the planarization layer 50 is provided with a first groove 70 at the periphery of the light emitting element 20, and a first reflective layer 81 is disposed on a sidewall of the first groove 70 facing the light emitting element 20. Because the first groove 70 is located at the periphery of the light emitting element 20, and the first reflective layer 81 is disposed on the sidewall of the first groove 70 facing the light emitting element 20, when the light emitting element 20 emits light, some light will inevitably emit to the periphery of the light emitting element 20 due to the scattering property of the light source, and in the present application, when the first reflective layer 81 is disposed at the periphery of the light emitting element 20, the first reflective layer 81 can reflect the light emitted from the light emitting element 20 to the periphery thereof, so that the light is emitted towards the light emitting surface of the display panel 100 as much as possible, thereby facilitating to improve the utilization rate of the light source of the light emitting element 20, and also facilitating to improve the brightness of the display panel 100.

It should be noted that fig. 6 and fig. 7 only show that the first groove 70 and the first reflective layer 81 are disposed on the periphery of one light emitting element 20, and in a specific application, the first groove 70 and the first reflective layer 81 can be correspondingly disposed on the periphery of each light emitting element 20 in the display panel 100, so as to facilitate improvement of the light utilization rate of each light emitting element 20, and further facilitate improvement of the overall brightness of the display panel 100.

Alternatively, the first recess 70 provided at the periphery of the light emitting element 20 of the present application is circular, oval, or rectangular. Fig. 6 illustrates a case where the first groove 70 located at the periphery of the light emitting element 20 is circular, and in some other embodiments of the present application, the first groove 70 may also be embodied in an oval shape or a rectangular shape, or other irregular shapes, which is not particularly limited in the present application.

In an alternative embodiment of the present invention, fig. 8 shows another BB' cross-sectional view of the light emitting element 20 of fig. 6, which shows a relative positional relationship of the first recess 70 and the third and

fourth vias

53 and 54.

In particular, with continued reference to fig. 8, the first groove 70, which is located at the periphery of the light emitting element 20, is located at a side of the third via 53 and the fourth via 54 remote from the light emitting element 20. When the light emitting element 20 emits light, due to the scattering property of the light source, a part of the light may be blocked by the third via hole 53 and the fourth via hole 54, and a part of the light may be emitted to the periphery of the light emitting element 20, in the present application, the first groove 70 is disposed on one side of the third via hole 53 and the fourth via hole 54 away from the light emitting element 20, and the first reflective layer 81 is disposed on one side of the first groove 70 facing the light emitting element 20, and the first reflective layer 81 can reflect the light scattered by the light emitting element 20 to the light emitting surface of the display panel 100 as much as possible, so as to facilitate increasing the light utilization rate of the light emitting element 20, and simultaneously facilitate increasing the brightness of the display panel 100. It should be noted that, when the first groove 70 is located on one side of the third via hole 53 and the fourth via hole 54 away from the light emitting element 20, the first groove 70 may be configured as a complete annular structure, and correspondingly, the first reflective layer 81 is also configured as a complete annular structure, and entirely surrounds the light emitting element 20 and the third via hole 53 and the fourth via hole 54, at this time, no matter the light scattered by the light emitting element 20 is scattered to any position on the periphery of the light emitting element 20, the first reflective layer 81 can reflect the light on the periphery, which is more favorable for improving the light utilization rate of the light emitting element 20, and is more favorable for improving the brightness of the display panel 100.

In an alternative embodiment of the present invention, fig. 9 is another BB' cross-sectional view of the light emitting element 20 of fig. 6, which shows another relative positional relationship of the first recess 70 and the third and

fourth vias

53 and 54.

In particular, with continued reference to fig. 9, the first recess 70 is located between the third and

fourth vias

53, 54 and the light emitting element 20. When the first groove 70 is disposed between the third via hole 53 and the fourth via hole 54 and the light emitting element 20, the distance between the first groove 70 and the light emitting element 20 is relatively small, and when the light emitting element 20 emits light scattered to the periphery of the light emitting element, the light is reflected by the first reflective layer 81 located on the sidewall of the first groove 70 and emitted to the light emitting surface of the display panel 100, so that the amount of light emitted from the light emitting element 20 to the light emitting surface of the display panel 100 is increased, which is not only beneficial to improving the light utilization rate of the light emitting element 20, but also beneficial to improving the brightness of the display panel 100. It should be noted that, when the first groove 70 and the first reflective layer 81 are disposed between the third via hole 53 and the fourth via hole 54 and the light emitting element 20, in order to avoid the short circuit phenomenon of the third via hole 53 and the fourth via hole 54, the first reflective layer 81 is selected as an insulating reflective material.

In an alternative embodiment of the present invention, fig. 10 is another top view of a light emitting element 20 in a display panel 100 provided in an embodiment of the present application, fig. 11 is a CC' sectional view of the light emitting element 20 in fig. 10, and fig. 10 and 11 illustrate a case where the first groove 70 includes two sub-grooves.

With continued reference to fig. 10 and 11, the first recess 70 includes a first sub-recess 71 and a second sub-recess 72, the first sub-recess 71 is disposed around one side of the light emitting element 20, the second sub-recess 72 is disposed around the other side of the light emitting element 20, and the first sub-recess 71 and the second sub-recess 72 are disconnected from each other.

Specifically, the present application introduces a first sub-groove 71 and a second sub-groove 72 opposite to the first sub-groove 71, and in the viewing angles shown in fig. 10 and 11, the first sub-groove 71 surrounds the left half portion of the light emitting element 20, the second sub-groove 72 surrounds the right half portion of the light emitting element 20, and the first sub-groove 71 and the second sub-groove 72 are independent from each other and are not connected to each other. When part of the light is scattered to the periphery of the light emitting element 20 in the process of emitting light by the light emitting element 20, the first sub-groove 71 and the second sub-groove 72 located at the periphery of the light emitting element 20 can reflect the light scattered by the light emitting element 20 to the light emitting surface of the display panel 100 as much as possible, which is also beneficial to improving the light utilization rate of the light emitting element 20 and the brightness of the display panel 100.

Optionally, with continued reference to fig. 11, the first sub-groove 71 is multiplexed as a third via 53 and the second sub-groove 72 is multiplexed as a fourth via 54. When the first sub-groove 71 is reused as the third via hole 53 and the second sub-groove 72 is reused as the fourth via hole 54, it is not necessary to provide a separate groove structure on the display panel 100 to provide the first reflective layer 81, and the existing film structure on the display panel 100 is fully utilized, so that the utilization rate of the light emitting element 20 is improved, meanwhile, the production process of the display panel 100 is saved, and the production efficiency of the display panel 100 is improved.

Optionally, with continued reference to fig. 11, when the first sub-groove 71 is reused as the third via 53 and the second sub-groove 72 is reused as the fourth via 54, the first reflective layer 81 is made of a conductive material, the first reflective layer 81 is filled in the third via 53 and the fourth via 54, the first reflective layer 81 in the third via 53 is electrically connected to the first electrode 21 and the first connection electrode 41, and the first reflective layer 81 in the fourth via 54 is electrically connected to the second electrode 22 and the second connection electrode 42.

Specifically, when the first reflective layer 81 is set as the conductive material, when the first reflective layer 81 is filled in the third via hole 53 and the fourth via hole 54, the first reflective layer 81 can be used to reflect the light scattered from the light emitting element 20 to the periphery thereof, thereby improving the light utilization rate of the light reflecting element, and further realizing the electrical connection between the first connecting electrode 41 and the first voltage terminal 31 and the electrical connection between the second connecting electrode 42 and the second voltage terminal 32, and the conductive material in the third via hole 53 and the fourth via hole 54 can realize the reflective function and the electrical connection function, thereby greatly simplifying the film layer setting of the display panel 100, facilitating the simplification of the manufacturing process of the display panel 100, and improving the production efficiency of the display panel 100. As the conductive material, a metal material having a high reflection property such as silver or aluminum may be used, and it is needless to say that other conductive materials having a reflection property may be used in addition to silver and aluminum, and the present application is not limited thereto.

In an alternative embodiment of the invention, fig. 12 is an alternative AA' cross-sectional view of the display panel 100 of the embodiment of fig. 2, which illustrates the display panel 100 including the passivation layer 90 and the second reflective layer 82.

In particular, with continued reference to fig. 12, the display panel 100 further includes a passivation layer 90 and a second reflection layer 82, the passivation layer 90 being located on a side of the first and

second connection electrodes

41 and 42 facing away from the substrate 10, the second reflection layer 82 being located on the passivation layer 90. The passivation layer 90 is disposed on the side of the first connection electrode 41 and the second connection electrode 42 facing away from the substrate 10, and the passivation layer 90 can protect each of the first connection electrode 41 and the second connection electrode 42 in the display panel 100. When the light emitting element 20 emits light, a part of the light may be emitted to a side of the light emitting element 20 departing from the substrate 10, and when the passivation layer 90 is disposed on a side of the passivation layer 90 departing from the substrate 10, the second reflective layer 82 can reflect the part of the light, and reflect the part of the light to the light emitting surface of the display panel 100 to the maximum extent, so as to further improve the light utilization rate of the light emitting element 20, and further improve the brightness of the display panel 100.

Alternatively, the orthographic projection of the second reflective layer 82 on the substrate 10 covers the light emitting element 20. Thus, the light scattered to the side of the light emitting element 20 departing from the substrate 10 in the light emitting process of each light emitting element 20 can be reflected by the second reflective layer 82, and the light utilization rate of each light emitting element 20 is improved to a great extent, so that the overall brightness of the display panel 100 is improved. Alternatively, the second reflective layer 82 may be made of a material having reflective properties, such as aluminum foil or white glue.

In an alternative embodiment of the present invention, fig. 13 is a cross-sectional view of the display panel 100 including the binding electrode 43, and this embodiment shows a case where the display panel 100 includes the third voltage terminal 33 and the binding electrode 43.

Specifically, with continued reference to fig. 13, the display panel 100 further includes a binding electrode 43 and a third voltage terminal 33, the third voltage terminal 33 is disposed on the same layer as the first voltage terminal 31 and the second voltage terminal 32, the binding electrode 43 is disposed on the same layer as the first connection electrode 41 and the second connection electrode 42, and the binding electrode 43 is used for binding the driving circuit board 101. The bonding electrode 43 for bonding the driving circuit board 101 is arranged on the side, away from the substrate 10, of the light-emitting element 20, and obviously, the light-emitting element 20 is of a bottom light-emitting structure, so that the driving circuit board 101 can be bonded at the position, corresponding to the display area, of the side, away from the substrate 10, of the light-emitting element 20, and therefore a frame area does not need to be arranged for the display panel 100, and therefore the frame-free design in the true sense is achieved. In addition, when the bonding electrode 43 is disposed on the same layer as the first connection electrode 41 and the second connection electrode 42, a new electrode film layer does not need to be separately disposed, and the bonding electrode 43 can be manufactured while the first connection electrode 41 and the second connection electrode 42 are manufactured, which is not only beneficial to simplifying the manufacturing process of the display panel 100, but also beneficial to simplifying the film layer structure of the display panel 100. In addition, the third voltage terminal 33, the first voltage terminal 31 and the second voltage terminal 32 are fabricated in the same layer, and a new film structure does not need to be separately introduced into the third voltage terminal 33, which is also beneficial to simplifying the fabrication process of the display panel 100 and simplifying the film structure of the display panel 100.

In an alternative embodiment of the invention, fig. 14 is a schematic diagram of a pixel circuit in the display panel 100 according to the embodiment of the present application, the display panel 100 further includes the pixel circuit, the pixel circuit provides a first voltage signal to the first voltage terminal 31 and provides a second voltage signal to the second voltage terminal 32, and the light emitting element 20 emits light under the driving action of the first voltage signal and the second voltage signal.

Specifically, the two poles of the light emitting element 20 are connected to a first voltage terminal 31 and a second voltage terminal 32, respectively, and the first voltage terminal 31 and the second voltage terminal 32 supply a positive voltage signal and a negative voltage signal to the two poles of the light emitting element 20, respectively, thereby driving the light emitting element 20 to emit light. The pixel circuit comprises a switch transistor T1 and a drive transistor T2, a scanning line S sends a scanning signal to a switch transistor T1 to enable a switch transistor T1 to be conducted; when the switching transistor T1 is turned on, the data line D transmits a data signal to the gate of the driving transistor T2 through the switching transistor T1, so that the driving transistor T2 generates a driving voltage to transmit to the light emitting element 20, thereby allowing the light emitting element 20 to emit light.

Based on the same inventive concept, the present application further provides a display device, and fig. 15 is a top view of the display device 200 provided in the embodiments of the present application, where the display device 200 includes a display panel 100, and the display panel 100 is any one of the display panels provided in the embodiments of the present application. For an embodiment of the display device provided in the embodiment of the present application, reference may be made to the embodiment of the display panel 100, and repeated descriptions are omitted. The display device provided by the application can be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. In particular, the display device provided by the present application can also be a large-size display device formed by splicing a plurality of display panels in the present application.

As can be seen from the above embodiments, the display panel and the display device provided by the present invention at least achieve the following advantages:

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A display panel, comprising:

a substrate;

The first connecting electrode is electrically connected with the first electrode and the first voltage end, and the second connecting electrode is electrically connected with the second electrode and the second voltage end;

the display panel further comprises a binding electrode and a third voltage end, the third voltage end and the first voltage end and the second voltage end are arranged on the same layer, the binding electrode and the first connecting electrode and the second connecting electrode are arranged on the same layer, and the binding electrode is used for binding the driving circuit board.

2. The display panel according to claim 1, wherein the first voltage terminal and the second voltage terminal are located on a side of the first electrode and the second electrode facing the substrate.

3. The display panel according to claim 1, further comprising a planarization layer between the film layers where the first and second voltage terminals are located and the film layers where the first and second connection electrodes are located, and covering the light-emitting elements.

4. The display panel according to claim 3, wherein the first connection electrode is connected to the first electrode through a first via hole, and wherein the second connection electrode is connected to the second electrode through a second via hole.

5. The display panel according to claim 4, wherein the first connection electrode is connected to the first voltage terminal through a third via hole, and the second connection electrode is connected to the second voltage terminal through a fourth via hole.

6. The display panel according to claim 5, wherein the planarization layer has a first groove formed at a periphery of the light emitting element, and a first reflective layer is formed on a sidewall of the first groove facing the light emitting element.

7. The display panel according to claim 6, wherein the first groove is circular, elliptical, or rectangular.

8. The display panel according to claim 6, wherein the first groove is located on a side of the third via and the fourth via away from the light emitting element.

9. The display panel according to claim 6, wherein the first groove is located between the third and fourth vias and the light emitting element.

10. The display panel according to claim 6, wherein the first groove comprises a first sub-groove and a second sub-groove, the first sub-groove is disposed around one side of the light emitting element, the second sub-groove is disposed around the other side of the light emitting element, and the first sub-groove and the second sub-groove are disconnected from each other.

11. The display panel of claim 10, wherein the first sub-groove is multiplexed as the third via and the second sub-groove is multiplexed as the fourth via.

12. The display panel according to claim 11, wherein the first reflective layer is a conductive material, the third via hole and the fourth via hole are filled with the first reflective layer, the first reflective layer in the third via hole electrically connects the first electrode and the first connection electrode, and the first reflective layer in the fourth via hole electrically connects the second electrode and the second connection electrode.

13. The display panel according to claim 1, further comprising a passivation layer on a side of the first and second connection electrodes facing away from the substrate, and a second reflective layer on the passivation layer.

14. The display panel according to claim 13, wherein an orthogonal projection of the second reflective layer on the substrate covers the light-emitting element.

15. The display panel according to claim 1, wherein the display panel further comprises a pixel circuit, the pixel circuit provides a first voltage signal to the first voltage terminal and provides a second voltage signal to the second voltage terminal, and the light emitting element emits light under driving of the first voltage signal and the second voltage signal.

16. A display device characterized by comprising the display panel according to any one of claims 1 to 15.