Light-emitting panel and light-emitting device

Abstract

The embodiment of the invention provides a light-emitting panel and a light-emitting device, relates to the technical field of illumination, and is used for enabling the light-emitting panel to have high connection reliability while achieving a color temperature adjustable function. The light-emitting panel comprises a substrate, a first electrode layer, a first light-emitting layer, a second electrode layer, a second light-emitting layer and a third electrode layer. The first electrode layer comprises an electrode layer body and a plurality of connecting parts arranged around the electrode layer body, the plurality of connecting parts comprise a first connecting part, a second connecting part and a third connecting part, and the first connecting part, the second connecting part and the third connecting part are arranged at intervals; the number of at least one of the first connecting parts, the second connecting parts and the third connecting parts is at least two; the electrode layer body, the first light-emitting layer, the second electrode layer, the second light-emitting layer and the third electrode layer are overlapped; the second electrode layer is in lap joint with the second connecting part, and the third electrode layer is in lap joint with the third connecting part. The light-emitting panel is used for emitting light.

Description

Technical Field

[0001] The present disclosure relates to the field of lighting technology, and in particular to a light-emitting panel and a light-emitting device. Background Art

[0002] In recent years, organic light-emitting diodes (OLEDs) have become a research hotspot in the fields of full-color display, backlight source and lighting due to their excellent performances such as soft light, close to natural light, wide viewing angle, fast response speed, light weight, high brightness, high efficiency and active light emission. However, most OLED lighting products currently have only one constant color temperature, which cannot meet the higher demand for lighting products. Summary of the invention

[0003] The purpose of the embodiments of the present disclosure is to provide a light-emitting panel and a light-emitting device, so that the light-emitting panel can achieve the function of adjustable color temperature while taking into account high connection reliability.

[0004] To achieve the above objectives, the embodiments of the present disclosure provide the following technical solutions:

[0005] On the one hand, a light-emitting panel is provided. The light-emitting panel includes a substrate, a first electrode layer, a first light-emitting layer, a second electrode layer, a second light-emitting layer and a third electrode layer. The first electrode layer is arranged on one side of the substrate, the first electrode layer includes an electrode layer body, and a plurality of connection parts arranged around the electrode layer body, the plurality of connection parts include a first connection part, a second connection part and a third connection part, the first connection part, the second connection part and the third connection part are arranged at intervals from each other, the electrode layer body is connected to the first connection part, and the second connection part and the third connection part are both arranged at intervals from the electrode layer body; the number of at least one of the first connection part, the second connection part and the third connection part is at least two; the first light-emitting layer, the second electrode layer, the second light-emitting layer and the third electrode layer are sequentially stacked in a direction away from the substrate on one side of the first electrode layer away from the substrate, the electrode layer body, the first light-emitting layer, the second electrode layer, the second light-emitting layer and the third electrode layer overlap; the second electrode layer overlaps the second connection part, and the third electrode layer overlaps the third connection part.

[0006] In the above-mentioned light-emitting panel, on the one hand, since the light-emitting panel includes a first light-emitting layer, a second electrode layer, a second light-emitting layer and a third electrode layer which are sequentially stacked in a direction away from the substrate on the side of the first electrode layer away from the substrate, wherein the electrode layer body in the first electrode layer is connected to the first connection portion, the second electrode layer is overlapped with the second connection portion, and the third electrode layer is overlapped with the third connection portion. Therefore, the electrode layer body and the second electrode layer can provide the voltage required for the first light-emitting layer to emit light, the second electrode layer and the third electrode layer can provide the voltage required for the second light-emitting layer to emit light, and the first light-emitting layer and the second light-emitting layer can emit light separately or simultaneously. When the first light-emitting layer and the second light-emitting layer emit light separately, and the colors of the light emitted by the first light-emitting layer and the second light-emitting layer are different, the same light-emitting panel can emit light of the color corresponding to the first light-emitting layer or the second light-emitting layer. When the first light-emitting layer and the second light-emitting layer emit light simultaneously, and the colors of the light emitted by the first light-emitting layer and the second light-emitting layer are different, by adjusting the magnitude of the voltage applied to the first light-emitting layer and / or the magnitude of the voltage applied to the second light-emitting layer, the ratio of the light-emitting color and the light-emitting brightness of the first light-emitting layer and the second light-emitting layer can be adjusted, and the light-emitting panel can realize the function of adjustable color temperature.

[0007] On the other hand, among the multiple connection parts, the number of at least one of the first connection part, the second connection part and the third connection part is at least two; therefore, there are at least two connection terminals between the electrode layer body, at least one of the second electrode layer and the third electrode layer and the external power supply, which can improve the reliability of the electrical connection between the electrode layer body, at least one of the second electrode layer and the third electrode layer and the external power supply.

[0008] In summary, the light-emitting panel can achieve the function of adjustable color temperature while taking into account high connection reliability.

[0009] In some embodiments, the number of first connection portions is at least two, and at least two first connection portions are not adjacent to each other along the circumference of the electrode layer body, and / or; the number of second connection portions is at least two, and at least two second connection portions are not adjacent to each other along the circumference of the electrode layer body, and / or; the number of third connection portions is at least two, and at least two third connection portions are not adjacent to each other along the circumference of the electrode layer body.

[0010] In some embodiments, the first electrode layer includes at least one first connection portion pair, and the two first connection portions included in each first connection portion pair are arranged on opposite sides of the electrode layer body; and / or, the first electrode layer includes at least one second connection portion pair, and the two second connection portions included in each second connection portion pair are arranged on opposite sides of the electrode layer body; and / or, the first electrode layer includes at least one third connection portion pair, and the two third connection portions included in each third connection portion pair are arranged on opposite sides of the electrode layer body.

[0011] In some embodiments, a line connecting the centers of the two first connection parts included in the first connection part pair passes through the center of the electrode layer body; and / or, a line connecting the centers of the two second connection parts included in the second connection part pair passes through the center of the electrode layer body; and / or, a line connecting the centers of the two third connection parts included in the third connection part pair passes through the center of the electrode layer body.

[0012] In some embodiments, the electrode layer body is an axisymmetric figure having at least two axes of symmetry; the two first connection parts included in the first connection part pair are symmetrical with respect to an axis of symmetry of the electrode layer body; and / or, the two second connection parts included in the second connection part pair are symmetrical with respect to an axis of symmetry of the electrode layer body; and / or, the two third connection parts included in the third connection part pair are symmetrical with respect to an axis of symmetry of the electrode layer body.

[0013] In some embodiments, the number of the first connection parts, the second connection parts and the third connection parts are at least two, and the first connection parts, the second connection parts and the third connection parts are periodically arranged along the circumference of the electrode layer body.

[0014] In some embodiments, the materials of the electrode layer body, the first connecting part, the second connecting part and the third connecting part are the same; among the electrode layer body, the second electrode layer and the third electrode layer, for any two of them with unequal square resistance, the area of ​​the connecting part connected to the one with relatively larger square resistance is larger than the area of ​​the connecting part connected to the one with smaller square resistance.

[0015] In some embodiments, the square resistance of the electrode layer body is greater than the square resistance of the second electrode layer, and the area of ​​the first connecting portion is greater than the area of ​​the second connecting portion; and / or, the square resistance of the electrode layer body is greater than the square resistance of the third electrode layer, and the area of ​​the first connecting portion is greater than the area of ​​the third connecting portion; and / or, the square resistance of the second electrode layer is greater than the square resistance of the third electrode layer, and the area of ​​the second connecting portion is greater than the area of ​​the third connecting portion.

[0016] In some embodiments, the edges of the electrode layer body and the connecting portion that are close to each other are parallel to each other.

[0017] In some embodiments, the electrode layer body is in the shape of a rectangle; at least two of the first connection part, the second connection part and the third connection part are arranged on one side of each long side of the electrode layer body; at least one of the first connection part, the second connection part and the third connection part is arranged on one side of each short side of the electrode layer body; and the number of connection parts arranged on one side of each long side of the electrode layer body is greater than the number of connection parts arranged on one side of each short side of the electrode layer body.

[0018] In some embodiments, the electrode layer body has a first symmetry axis parallel to the length direction of the electrode layer body, and a second symmetry axis parallel to the width direction of the electrode layer body; the first connecting portion, the second connecting portion and the third connecting portion are all symmetrically arranged relative to the first symmetry axis or the second symmetry axis.

[0019] In some embodiments, a line connecting the centers of the first connection portions located on opposite sides of the electrode layer body, a line connecting the centers of the second connection portions located on opposite sides of the electrode layer body, and a line connecting the centers of the third connection portions located on opposite sides of the electrode layer body all pass through the center of the electrode layer body.

[0020] In some embodiments, the shape of the electrode layer body is a regular N-gon, N is an even number and N is greater than or equal to 4; a connecting portion is provided on one side of each edge of the electrode layer body; the first connecting portion, the second connecting portion and the third connecting portion are all symmetrically arranged relative to a symmetry axis of the electrode layer body.

[0021] In some embodiments, the shape of the electrode layer body is circular or annular; an even number of first connection parts, an even number of second connection parts and an even number of third connection parts are arranged outside the circular boundary or outside the outer boundary of the annular ring; the first connection parts, the second connection parts and the third connection parts are all symmetrically arranged relative to a symmetry axis of the electrode layer body.

[0022] In some embodiments, the electrode layer body is in the shape of a ring; at least two of the first connection part, the second connection part and the third connection part are arranged on the outside of the outer boundary of the electrode layer body; at least one of the first connection part, the second connection part and the third connection part is arranged on the inside of the inner boundary of the electrode layer body; and the first connection part, the second connection part and the third connection part located at the outer boundary or the inner boundary are symmetrically arranged relative to a symmetry axis of the electrode layer body.

[0023] In some embodiments, along the radial direction of the electrode layer body, the first connection portion located at the outer boundary overlaps with the first connection portion located at the inner boundary; the second connection portion located at the outer boundary overlaps with the second connection portion located at the inner boundary; the third connection portion located at the outer boundary overlaps with the third connection portion located at the inner boundary; or, along the radial direction of the electrode layer body, the first connection portion located at the outer boundary overlaps with the second connection portion and the third connection portion located at the inner boundary; the second connection portion located at the outer boundary overlaps with the first connection portion and the third connection portion located at the inner boundary; the third connection portion located at the outer boundary overlaps with the first connection portion and the second connection portion located at the inner boundary.

[0024] In some embodiments, the number of connecting parts is m, the number of electrode layers is n, and the relationship between the number of connecting parts and the number of electrode layers satisfies m=kn, where k is an integer greater than or equal to 2.

[0025] In some embodiments, the first light-emitting layer and the second light-emitting layer emit light of different colors.

[0026] In some embodiments, the first electrode layer also includes a fourth connecting portion arranged around the electrode layer body, and the fourth connecting portion and the electrode layer body, the first connecting portion, the second connecting portion and the third connecting portion are all spaced apart from each other; the light-emitting panel also includes: a third light-emitting layer and a fourth electrode layer arranged on the side of the third electrode layer away from the substrate, the third light-emitting layer is closer to the substrate than the fourth electrode layer, and the electrode layer body, the first light-emitting layer, the second electrode layer, the second light-emitting layer, the third electrode layer, the third light-emitting layer and the fourth electrode layer overlap; the fourth electrode layer is overlapped with the fourth connecting portion.

[0027] In some embodiments, the number of the fourth connection portions is at least two, and along the circumference of the electrode layer body, the fourth connection portions are not adjacent to each other.

[0028] In another aspect, a light emitting device is provided, comprising: a light emitting panel according to any one of the above embodiments and a controller, wherein the controller is connected to a plurality of connection parts of the light emitting panel.

[0029] The above-mentioned light-emitting device has the same structure and beneficial technical effects as the light-emitting panels provided in some of the above-mentioned embodiments, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the present disclosure, the following briefly introduces the drawings required to be used in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can also be obtained based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams, and are not limitations on the actual size of the product involved in the embodiments of the present disclosure, the actual process of the method, the actual timing of the signal, etc.

[0031] Figure 1 A top view of a light emitting panel according to some embodiments;

[0032] Figure 2 for Figure 1 A structural diagram of a first electrode layer in a light-emitting panel;

[0033] Figure 3 for Figure 1 A cross-sectional view of the light emitting panel along section line AA;

[0034] Figure 4 A top view of another light emitting panel provided according to some embodiments;

[0035] Figure 5 for Figure 4A structural diagram of a first electrode layer in a light-emitting panel;

[0036] Figure 6 for Figure 4 A cross-sectional view of the light emitting panel along section line AA;

[0037] Figure 7 for Figure 4 A cross-sectional view of the light emitting panel along section line BB;

[0038] Figure 8 for Figure 4 A cross-sectional view of the light emitting panel along section line CC;

[0039] Fig. 9 A top view of another light emitting panel provided according to some embodiments;

[0040] Fig.10 A top view of another light emitting panel provided according to some embodiments;

[0041] Fig.11 for Fig.10 A structural diagram of a first electrode layer in a light-emitting panel;

[0042] Fig.12 for Fig.10 A cross-sectional view of the light emitting panel along section line DD;

[0043] Fig.13 for Fig.10 A cross-sectional view of the light emitting panel along section line EE;

[0044] Fig.14 for Fig.10 A cross-sectional view of the light emitting panel along section line FF;

[0045] Fig.15 is a structural diagram of a first electrode layer provided according to some embodiments;

[0046] Fig.16 is a structural diagram of a first electrode layer provided according to some embodiments;

[0047] Fig.17 is a structural diagram of a first electrode layer provided according to some embodiments;

[0048] Fig.18 is a structural diagram of a first electrode layer provided according to some embodiments;

[0049] Fig.19 is a structural diagram of a first electrode layer provided according to some embodiments;

[0050] Fig. 20 is a structural diagram of a first electrode layer provided according to some embodiments;

[0051] Fig.21 is a structural diagram of a first electrode layer provided according to some embodiments;

[0052] Fig. 22 is a structural diagram of a first electrode layer provided according to some embodiments;

[0053] Fig.23 is a structural diagram of a light emitting device provided according to some embodiments;

[0054] Fig.24 is a structural diagram of yet another light-emitting device provided according to some embodiments. DETAILED DESCRIPTION

[0055] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present disclosure.

[0056] Unless the context requires otherwise, throughout the specification and claims, the term "including" is to be interpreted as an open, inclusive meaning, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples" or "some examples" and the like are intended to indicate that specific features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms do not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics described may be included in any one or more embodiments or examples in any appropriate manner.

[0057] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0058] When describing some embodiments, the expression "connection" and its derivatives may be used. The term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0059] “At least one of A, B, and C” has the same meaning as “at least one of A, B, or C” and both include the following combinations of A, B, and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B, and C.

[0060] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0061] The use of "adapted to" or "configured to" herein is meant to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0062] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0063] As used herein, "parallel", "perpendicular", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within the acceptable deviation range, wherein the acceptable deviation range is determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism may be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity may also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality may be, for example, the difference between the two equalities is less than or equal to 5% of either one.

[0064] It will be understood that when a layer or an element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present between the layer or element and the other layer or substrate.

[0065] Exemplary embodiments are described herein with reference to cross-sectional views and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of the layers and the area of ​​the regions are exaggerated for clarity. Therefore, variations in the shapes relative to the drawings due to, for example, manufacturing techniques and / or tolerances are conceivable. Therefore, the exemplary embodiments should not be interpreted as being limited to the shapes of the regions shown herein, but include shape deviations due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shapes of the regions of the device, and are not intended to limit the scope of the exemplary embodiments.

[0066] The embodiment of the present disclosure provides a light emitting panel 1000, Figure 1 , Figure 2 and Figure 3 The light emitting panel 1000 includes a substrate 100, a first electrode layer 201, a light emitting layer EL and a second electrode layer 202 which are stacked.

[0067] The material of the substrate 100 is a transparent material. For example, the substrate 100 can be a transparent flexible substrate, and the flexible substrate can include, for example, a polyethylene terephthalate (PET) substrate, a polyethylene naphthalate dicarboxylic acid glycol ester (PEN) substrate, or a colorless polyimide (CPI) substrate. In this case, the light-emitting panel 1000 can be a flexible light-emitting panel. Alternatively, a transparent rigid substrate can be used, and the rigid substrate can include, for example, a glass substrate, an ultra-thin glass (UTG), a polymethylmethacrylate (PMMA) substrate, a silicon substrate, etc. In this case, the light-emitting panel 1000 can be a rigid light-emitting panel.

[0068] In some embodiments, continue to refer to Figure 3 A buffer layer 101 may be further provided between the substrate 100 and the first electrode layer 201 to reduce stress generated between the first electrode layer 201 and the substrate 100 when the first electrode layer 201 is formed.

[0069] Continue to refer Figure 2 The first electrode layer 201 includes an electrode layer body 20 and a first connection portion L1 and a second connection portion L2 arranged around the electrode layer body 20. The first connection portion L1 and the second connection portion L2 are spaced apart from each other. The electrode layer body 20 is connected to the first connection portion L1, and the second connection portion L2 is spaced apart from the electrode layer body 20.

[0070] In the above-mentioned light-emitting panel 1000, the electrode layer body 20, the light-emitting layer EL and the second electrode layer 202 overlap; the second electrode layer 202 overlaps the second connection portion L2. Since the electrode layer body 20 is connected to the first connection portion L1, and the second electrode layer 202 overlaps the second connection portion L2, the first connection portion L1 and the second connection portion L2 are arranged at intervals from each other, which can avoid a short circuit between the electrode layer body 20 and the second electrode layer 202, thereby preventing the light-emitting panel 1000 from being damaged. In this way, the voltage signal of the electrode layer body 20 is input through the first connection portion L1, and the voltage signal of the second electrode layer 202 is input through the second connection portion L2. A voltage difference is formed between the electrode layer body 20 and the second electrode layer 202, which can provide the voltage required for the light-emitting layer EL to emit light, thereby causing the light-emitting layer EL to emit light.

[0071] The light-emitting layer EL includes an organic light-emitting layer, and the light-emitting layer EL may also include at least one of a hole injection layer, a hole transport layer, an electron blocking layer, a hole blocking layer, an electron transport layer, and an electron injection layer. The color of the light emitted by the light-emitting layer EL may be any one of red, blue, green, or white, and the color of the light emitted by the light-emitting layer EL is set according to the lighting scene of the actual application. For example, when the light-emitting panel 1000 is applied to a taillight, the light-emitting layer EL may emit red light.

[0072] In the light-emitting panel 1000 of this embodiment, the electrode layer body 20, the light-emitting layer EL and the second electrode layer 202 can constitute an OLED light-emitting device. Among them, the electrode layer body 20 can be configured as the anode of the OLED light-emitting device, and the second electrode layer 202 can be configured as the cathode of the OLED light-emitting device. If a relatively high potential is applied to the electrode layer body 20 and a relatively low potential is applied to the second electrode layer 202, holes are injected from the electrode layer body 20 to the organic light-emitting layer through the hole transport layer, and electrons are injected from the second electrode layer 202 to the organic light-emitting layer through the electron transport layer, so that the holes from the electrode layer body 20 and the electrons from the second electrode layer 202 are recombined in the organic light-emitting layer, and the light-emitting layer EL is excited to emit light through the energy generated at this time. In other embodiments, the electrode layer body 20 can be configured as the cathode of the OLED light-emitting device, and correspondingly, the second electrode layer 202 is configured as the anode of the OLED light-emitting device.

[0073] In this embodiment, the electrode layer body 20 can transmit light, the second electrode layer 202 can reflect light, and the light emitted by the light emitting layer EL is emitted through the substrate 100 .

[0074] In other embodiments, the electrode layer body 20 can reflect light, the second electrode layer 202 can transmit light, and the light emitted by the light-emitting layer EL is emitted in a direction away from the substrate 100 .

[0075] The above-mentioned light-emitting panel 1000 has only one light-emitting layer EL, and therefore can only emit light of a single color and a constant color temperature, and cannot achieve color temperature adjustment to meet higher demands for lighting products.

[0076] In order to solve the above technical problems, the embodiment of the present disclosure provides a light emitting panel 1000, Figure 4 , Figure 5 and Figure 6 The light emitting panel 1000 includes: a substrate 100 , a first electrode layer 201 , a first light emitting layer EL1 , a second electrode layer 202 , a second light emitting layer EL2 and a third electrode layer 203 .

[0077] The first electrode layer 201 is disposed on one side of the substrate 100. Figure 5 The first electrode layer 201 includes an electrode layer body 20 and a plurality of connection parts arranged around the electrode layer body 20, the plurality of connection parts include a first connection part L1, a second connection part L2 and a third connection part L3, the first connection part L1, the second connection part L2 and the third connection part L3 are spaced apart from each other, the electrode layer body 20 is connected to the first connection part L1, and the second connection part L2 and the third connection part L3 are spaced apart from the electrode layer body 20.

[0078] Combined with reference Figure 6 , Figure 7 and Figure 8 The first light-emitting layer EL1, the second electrode layer 202, the second light-emitting layer EL2 and the third electrode layer 203 are stacked in sequence on the side of the first electrode layer 201 away from the substrate 100 in the direction away from the substrate 100, and the electrode layer body 20, the first light-emitting layer EL1, the second electrode layer 202, the second light-emitting layer EL2 and the third electrode layer 203 overlap; the second electrode layer 202 overlaps the second connecting portion L2, and the third electrode layer 203 overlaps the third connecting portion L3.

[0079] refer to Figure 6 , the electrode layer body 20 is connected to the first connection portion L1, refer to Figure 7 , the second electrode layer 202 overlaps the second connection portion L2, referring to Figure 8 , the third electrode layer 203 overlaps the third connection portion L3, so the first connection portion L1, the second connection portion L2 and the third connection portion L3 are arranged at intervals, which can prevent any two of the electrode layer body 20, the second electrode layer 202 and the third electrode layer 203 from short-circuiting and damaging the light-emitting panel 1000. In this way, the voltage signal of the electrode layer body 20 can be input through the first connection portion L1, the voltage signal of the second electrode layer 202 can be input through the second connection portion L2, and the voltage signal of the third electrode layer 203 can be input through the third connection portion L3.

[0080] The light-emitting panel 1000 in this embodiment includes a first light-emitting layer EL1, a second electrode layer 202, a second light-emitting layer EL2, and a third electrode layer 203 which are sequentially stacked on a side of the first electrode layer 201 away from the substrate 100 in a direction away from the substrate 100. Among them, the electrode layer body 20 in the first electrode layer 201 is connected to the first connection portion L1, the second electrode layer 202 is overlapped with the second connection portion L2, and the third electrode layer 203 is overlapped with the third connection portion L3. Therefore, the electrode layer body 20 and the second electrode layer 202 can provide the voltage required for the first light-emitting layer EL1 to emit light, and the second electrode layer 202 and the third electrode layer 203 can provide the voltage required for the second light-emitting layer EL2 to emit light, and the first light-emitting layer EL1 and the second light-emitting layer EL2 can emit light separately or simultaneously. When the first light-emitting layer EL1 and the second light-emitting layer EL2 emit light separately, and the colors of the light emitted by the first light-emitting layer EL1 and the second light-emitting layer EL2 are different, the same light-emitting panel 1000 can emit light of the color corresponding to the first light-emitting layer EL1 or the second light-emitting layer EL2. When the first light-emitting layer EL1 and the second light-emitting layer EL2 emit light at the same time and the colors of the light emitted by the first light-emitting layer EL1 and the second light-emitting layer EL2 are different, the ratio of the light-emitting color and the light-emitting brightness of the first light-emitting layer EL1 and the second light-emitting layer EL2 can be adjusted by adjusting the magnitude of the voltage applied to the first light-emitting layer EL1 and / or the magnitude of the voltage applied to the second light-emitting layer EL2, so that the light-emitting panel 1000 can realize the function of adjustable color temperature.

[0081] In the above-mentioned light-emitting panel 1000, the electrode layer body 20, the first light-emitting layer EL1 and the second electrode layer 202 can constitute a first OLED light-emitting device, and the second electrode layer 202, the second light-emitting layer EL2 and the third electrode layer 203 can constitute a second OLED light-emitting device. That is, the second electrode layer 202 can be an electrode in the first OLED light-emitting device or an electrode in the second OLED light-emitting device. For example, a relatively high potential is applied to the electrode layer body 20, and a relatively low potential is applied to the second electrode layer 202, so that the electrode layer body 20 can be used as the anode of the first OLED light-emitting device, and the second electrode layer 202 can be used as the cathode of the first OLED light-emitting device. On this basis, a potential lower than the second electrode layer 202 is applied to the third electrode layer 203, so that the second electrode layer 202 can be used as the anode of the second OLED light-emitting device, and the third electrode layer 203 can be used as the cathode of the second OLED light-emitting device. By applying corresponding potentials to the electrode layer body 20, the second electrode layer 202 and the third electrode layer 203, the first OLED light-emitting device and the second OLED light-emitting device can be made to emit light separately or simultaneously.

[0082] In the above-mentioned light-emitting panel 1000, the first light-emitting layer EL1 includes: an organic light-emitting layer, and may also include at least one of a hole injection layer, a hole transport layer, and an electron blocking layer arranged between the electrode layer body 20 and the organic light-emitting layer, and at least one of an electron injection layer, an electron transport layer, and a hole blocking layer arranged between the second electrode layer 202 and the organic light-emitting layer. The specific arrangement is based on actual needs, and this embodiment does not impose any limitation on this.

[0083] The second light-emitting layer EL2 may include: an organic light-emitting layer, and may also include at least one of a hole injection layer, a hole transport layer, and an electron blocking layer arranged between the second electrode layer 202 and the organic light-emitting layer, and at least one of an electron injection layer, an electron transport layer, and a hole blocking layer arranged between the third electrode layer 203 and the organic light-emitting layer. The specific arrangement is based on actual needs, and this embodiment does not impose any limitation on this.

[0084] In some embodiments, the electrode layer body 20 and the second electrode layer 202 can transmit light, and the third electrode layer 203 can reflect light. In this case, the light emitted by the first light-emitting layer EL1 and the second light-emitting layer EL2 is emitted through the substrate 100. In other embodiments, the second electrode layer 202 and the third electrode layer 203 can transmit light, and the electrode layer body 20 can reflect light. In this case, the light emitted by the first light-emitting layer EL1 and the second light-emitting layer EL2 is emitted in a direction away from the substrate 100.

[0085] In some embodiments, the first light emitting layer EL1 and the second light emitting layer EL2 emit light of different colors.

[0086] For example, when the color of the light emitted by the first light-emitting layer EL1 is red, the color of the light emitted by the second light-emitting layer EL2 may be any one of blue, green and white. When the color of the light emitted by the first light-emitting layer EL1 is blue, the color of the light emitted by the second light-emitting layer EL2 may be any one of red, green and white. When the color of the light emitted by the first light-emitting layer EL1 is green, the color of the light emitted by the second light-emitting layer EL2 may be any one of red, blue and white. When the color of the light emitted by the first light-emitting layer EL1 is white, the color of the light emitted by the second light-emitting layer EL2 may be any one of red, blue and green. In this way, the color of the light emitted by the light-emitting panel 1000 is the light after the superposition of two different lights emitted by the first light-emitting layer EL1 and the second light-emitting layer EL2, and by adjusting the magnitude of the voltage applied to the first light-emitting layer EL1 and / or the magnitude of the voltage applied to the second light-emitting layer EL2, the ratio of the light-emitting color and the light-emitting brightness of the first light-emitting layer EL1 and the second light-emitting layer EL2 can be adjusted, so that the light-emitting panel 1000 can realize the function of adjustable color temperature. The colors of the light emitted by the first light-emitting layer EL1 and the second light-emitting layer EL2 can be set according to the needs of the actual application scenario.

[0087] refer to Fig. 9 The light emitting panel 1000 further includes: an encapsulation structure 102 , which is located on a side of the third electrode layer 203 away from the substrate 100 and covers a side wall of the third electrode layer 203 , a portion of the second light emitting layer EL2 , and a portion of the side wall of the second electrode layer 202 .

[0088] The encapsulation structure 102 is used to encapsulate the third electrode layer 203, the second light-emitting layer EL2 and the second electrode layer 202, which can prevent the third electrode layer 203 from leaking electricity, and can also protect the third electrode layer 203, the second light-emitting layer EL2 and the second electrode layer 202, and prevent external water and oxygen from corroding the first light-emitting layer EL1 and the second light-emitting layer EL2.

[0089] For example, the material of the package structure 102 may include silicon nitride (SiN x ), silicon oxide (SiO x ), silicon oxynitride (SiO x N y ) or a combination of one or more thereof.

[0090] Continue to refer Fig. 9The light-emitting panel 1000 further includes: an encapsulation layer 103 and a cover plate 104. The encapsulation layer 103 is located between the encapsulation structure 102 and the cover plate 104. The encapsulation layer 103 also covers the side wall of the encapsulation structure 102. The cover plate 104 is bonded to the side of the encapsulation layer 103 away from the substrate 100 through the encapsulation layer 103. The encapsulation layer 103 and the cover plate 104 realize encapsulation protection of the first light-emitting layer EL1, the second electrode layer 202, the third light-emitting layer EL2 and the third electrode layer 203.

[0091] The cover plate 104 may be made of tempered glass, strengthened glass, etc.

[0092] The first connection part L1, the second connection part L2 and the third connection part 23 in the above-mentioned light-emitting panel 1000 extend to the outside of the packaging structure 102 and the packaging glue layer 103 and are connected to the external circuit, so that the external circuit can input the signal required for the first light-emitting layer EL1 to emit light through the first connection part L1 and the second connection part L2, and input the signal required for the second light-emitting layer EL2 to emit light through the second connection part L2 and the third connection part L3.

[0093] In some embodiments, in conjunction with reference Fig.10 and Fig.11 , the first electrode layer 201 further includes a fourth connection portion L4 disposed around the electrode layer body 20, the fourth connection portion L4 and the electrode layer body 20, the first connection portion L1, the second connection portion L2 and the third connection portion L3 are all spaced apart from each other; Fig.12 The light-emitting panel 1000 also includes: a third light-emitting layer EL3 and a fourth electrode layer 204 arranged on a side of the third electrode layer 203 away from the substrate 100, the third light-emitting layer EL3 is closer to the substrate 100 than the fourth electrode 204, and the electrode layer body 20, the first light-emitting layer EL1, the second electrode layer 202, the second light-emitting layer EL2, the third electrode layer 203, the third light-emitting layer EL3 and the fourth electrode layer 204 overlap; the fourth electrode layer 204 is overlapped with the fourth connecting portion L4.

[0094] In the light emitting panel 1000 provided in the above embodiment, reference Fig.12 , the second electrode layer 202 overlaps the second connection portion L2, referring to Fig.13 , the third electrode layer 203 overlaps the third connection portion L3, referring to Fig.14, the fourth electrode layer 204 overlaps the fourth connection portion L4. Therefore, the electrode layer body 20 and the second electrode layer 202 can provide the voltage required for the first light-emitting layer EL1 to emit light, the second electrode layer 202 and the third electrode layer 203 can provide the voltage required for the second light-emitting layer EL2 to emit light, the third electrode layer 203 and the fourth electrode layer 204 can provide the voltage required for the third light-emitting layer EL3 to emit light, and the first light-emitting layer EL1, the second light-emitting layer EL2 and the third light-emitting layer EL3 can emit light separately or simultaneously. When the first light-emitting layer EL1, the second light-emitting layer EL2 and the third light-emitting layer EL3 emit light separately, and the colors of the light emitted by the first light-emitting layer EL1, the second light-emitting layer EL2 and the third light-emitting layer EL3 are different, the same light-emitting panel 1000 can emit light of the color corresponding to the first light-emitting layer EL1, the second light-emitting layer EL2 or the third light-emitting layer EL3. When the first light-emitting layer EL1, the second light-emitting layer EL2 and the third light-emitting layer EL3 emit light at the same time, and the colors of the light emitted by the first light-emitting layer EL1, the second light-emitting layer EL2 and the third light-emitting layer EL3 are different, by adjusting the magnitude of the voltage applied to the first light-emitting layer EL1, and / or the magnitude of the voltage applied to the second light-emitting layer EL2, and / or the magnitude of the voltage applied to the third light-emitting layer EL3, the ratio of the light-emitting color and the light-emitting brightness of the first light-emitting layer EL1, the second light-emitting layer EL2 and the third light-emitting layer EL3 can be adjusted, so that the light-emitting panel 1000 can realize the function of adjustable color temperature.

[0095] When the light-emitting panel 1000 further includes a third light-emitting layer EL3 and a fourth electrode layer 204, the electrode layer body 20, the second electrode layer 202 and the third electrode layer 203 can transmit light, and the fourth electrode layer 204 can reflect light. Among them, the electrode layer body 20, the first light-emitting layer EL1 and the second electrode layer 202 can constitute a first OLED light-emitting device, the second electrode layer 202, the second light-emitting layer EL2 and the third electrode layer 203 can constitute a second OLED light-emitting device, and the third electrode layer 203, the third light-emitting layer EL3 and the fourth electrode layer 204 can constitute a third OLED light-emitting device. That is, the second electrode layer 202 can be an electrode in the first OLED light-emitting device or an electrode in the second OLED light-emitting device, and the third electrode layer 202 can be an electrode in the second OLED light-emitting device or an electrode in the third OLED light-emitting device.

[0096] In the above-mentioned light-emitting panel 1000, the third light-emitting layer EL3 includes: an organic light-emitting layer, and may also include at least one of a hole injection layer, a hole transport layer, and an electron blocking layer arranged between the third electrode layer 203 and the organic light-emitting layer, and at least one of an electron injection layer, an electron transport layer, and a hole blocking layer arranged between the fourth electrode layer 204 and the organic light-emitting layer. The specific arrangement is based on actual needs, and this embodiment does not impose any limitation on this.

[0097] In some embodiments, the first light-emitting layer EL1 , the second light-emitting layer EL2 , and the third light-emitting layer EL3 emit lights of different colors.

[0098] Exemplarily, the color of the light emitted by the first light-emitting layer EL1 includes any one of red, blue, green and white, the color of the light emitted by the second light-emitting layer EL2 includes any one of red, blue, green and white, and the color of the light emitted by the third light-emitting layer EL3 includes any one of red, blue, green and white, as long as the colors of the light emitted by the first light-emitting layer EL1, the second light-emitting layer EL2 and the third light-emitting layer EL3 are different. In this way, the color of the light emitted by the light-emitting panel 1000 is the light after the superposition of three different lights emitted by the first light-emitting layer EL1, the second light-emitting layer EL2 and the third light-emitting layer EL3, and by adjusting the magnitude of the voltage applied to the first light-emitting layer EL1, and / or the magnitude of the voltage applied to the second light-emitting layer EL2, and / or the magnitude of the voltage applied to the third light-emitting layer EL3, the ratio of the light-emitting color and the light-emitting brightness of the first light-emitting layer EL1, the second light-emitting layer EL2 and the third light-emitting layer EL3 can be adjusted, so that the light-emitting panel can realize the function of adjustable color temperature. The colors of the light emitted by the first light-emitting layer EL1, the second light-emitting layer EL2 and the third light-emitting layer EL3 can be set according to the needs of the actual application scenario.

[0099] For example, the color of the light emitted by the first light-emitting layer EL1 may be red, the color of the light emitted by the second light-emitting layer EL2 may be blue, and the color of the light emitted by the third light-emitting layer EL3 may be green. Alternatively, the color of the light emitted by the first light-emitting layer EL1 may be blue, the color of the light emitted by the second light-emitting layer EL2 may be red, and the color of the light emitted by the third light-emitting layer EL3 may be green. Alternatively, the color of the light emitted by the first light-emitting layer EL1 may be green, the color of the light emitted by the second light-emitting layer EL2 may be red, and the color of the light emitted by the third light-emitting layer EL3 may be blue. Alternatively, the color of the light emitted by the first light-emitting layer EL1 may be green, the color of the light emitted by the second light-emitting layer EL2 may be red, and the color of the light emitted by the third light-emitting layer EL3 may be white. These are not listed here one by one, as long as the colors of the light emitted by the first light-emitting layer EL1, the second light-emitting layer EL2, and the third light-emitting layer EL3 are different.

[0100] In some embodiments, the light-emitting panel 1000 may further include more light-emitting layers, such as a fourth light-emitting layer, a fifth light-emitting layer, and a sixth light-emitting layer, so that the light-emitting panel 1000 can realize various color temperature adjustable functions according to the needs of actual application scenarios, so as to meet more lighting requirements of the light-emitting panel 1000. In the case where the light-emitting panel 1000 includes more light-emitting layers, the light-emitting panel 1000 also needs to be provided with corresponding electrode layers, so that each light-emitting layer is sandwiched between two adjacent electrode layers, so that the two adjacent electrode layers input the voltage signal required for light emission to the light-emitting layer sandwiched in the middle.

[0101] Under the condition that the light-emitting panel 1000 can realize the function of adjustable color temperature, the number of electrode layers also increases. If there is a break or poor connection between a certain electrode layer and an external power supply, the light-emitting layer adjacent to the electrode layer will not be able to emit light normally, which will affect the function of adjustable color temperature of the light-emitting panel 1000.

[0102] In order to solve the above technical problems, this embodiment provides a light emitting panel 1000, which can be further referred to as Figure 5 In the case where the light-emitting panel 1000 includes the substrate 100, the first electrode layer 201, the first light-emitting layer EL1, the second electrode layer 202, the second light-emitting layer EL2 and the third electrode layer 203, the first electrode layer 201 includes a plurality of connection parts L, the plurality of connection parts L include a first connection part L1, a second connection part L2 and a third connection part L3, and the number of at least one of the first connection part L1, the second connection part L2 and the third connection part L3 is at least two, so that at least one of the electrode layer body 20, the second electrode layer 202 and the third electrode layer 203 and the external power supply has at least two connection terminals, thereby improving the reliability of the electrical connection between the electrode layer body 20, the second electrode layer 202 and the third electrode layer 203 and the external power supply. Furthermore, the light-emitting panel 1000 can realize the function of adjustable color temperature while taking into account high connection reliability.

[0103] In some embodiments, the number of connection parts is m, the number of electrode layers is n, and the relationship between the number of connection parts and the number of electrode layers satisfies m=kn, where k is an integer greater than or equal to 2. For example, the number of connection parts connected to each electrode layer can be k, and k is an integer greater than or equal to 2, where k can be 2, 3, 4 or 6, or other integers, so that there are k connection terminals between each electrode layer and the external power supply, thereby improving the reliability of the electrical connection between each electrode layer and the external power supply.

[0104] In some embodiments, reference may be made to Figure 5, the edges of the electrode layer body 20 and the connection portion L that are close to each other are parallel to each other. In this way, the distance between the electrode layer body 20 and the connection portion L can be shortened, thereby reducing the occupied area of ​​the first electrode layer 201, which is conducive to reducing the volume of the light-emitting panel 1000.

[0105] In some embodiments, the number of the first connection parts L1 is at least two, and at least two first connection parts L1 are not adjacent along the circumference of the electrode layer body 20. In this way, while ensuring the reliability of the electrical connection of the light-emitting panel 1000, the voltage signal provided by the external power supply can be connected to the electrode layer body 20 from different positions, which can avoid the voltage drop problem caused by connecting the voltage signal from a single position, and can avoid the uneven voltage drop in various parts of the electrode layer body 20, which leads to excessive local current when the light-emitting panel 1000 emits light, thereby causing the light-emitting panel 1000 to emit light too brightly locally, resulting in uneven brightness display of the light-emitting panel 1000. Therefore, at least two first connection parts L1 are not adjacent, which can improve the uniformity of the voltage on the electrode layer body 20, thereby improving the uniformity of the light-emitting brightness of the light-emitting panel 1000.

[0106] In some embodiments, the number of the second connection parts L2 is at least two, and at least two second connection parts L2 are not adjacent to each other along the circumference of the electrode layer body 20. In this way, the uniformity of the light emitting brightness of the light emitting panel 1000 can be improved.

[0107] In some embodiments, the number of the third connection portions L3 is at least two, and at least two third connection portions L3 are not adjacent to each other along the circumference of the electrode layer body 20. This can improve the uniformity of the light emitting brightness of the light emitting panel 1000.

[0108] In some embodiments, at least two first connection parts L1 are not adjacent, and at least two second connection parts L2 are not adjacent. Alternatively, at least two first connection parts L1 are not adjacent, and at least two third connection parts L3 are not adjacent. Alternatively, at least two second connection parts L2 are not adjacent, and at least two third connection parts L3 are not adjacent. Alternatively, at least two first connection parts L1 are not adjacent, and at least two second connection parts L2 are not adjacent, and at least two third connection parts L3 are not adjacent. All of these can improve the uniformity of the luminous brightness of the light-emitting panel 1000.

[0109] For example, continue to refer to Figure 5 The number of the first connection parts L1 is four, and along the circumference of the electrode layer body 20, the four first connection parts L1 are not adjacent; and the number of the second connection parts L2 is two, and along the circumference of the electrode layer body 20, the two second connection parts L2 are not adjacent; and the number of the third connection parts L3 is two, and along the circumference of the electrode layer body 20, the two third connection parts L3 are not adjacent.

[0110] Exemplary, reference Fig.15The number of the first connection parts L1 is two, and along the circumference of the electrode layer body 20, the two first connection parts L1 are not adjacent to each other; and the number of the second connection parts L2 is four, and along the circumference of the electrode layer body 20, the four second connection parts L2 are not adjacent to each other; and the number of the third connection parts L3 is four, and along the circumference of the electrode layer body 20, the four third connection parts L3 are not adjacent to each other.

[0111] In some embodiments, the first electrode layer 201 includes at least one first connection portion pair D1, and the two first connection portions L1 included in each first connection portion pair D1 are arranged on opposite sides of the electrode layer body 20. Due to the presence of resistance on the electrode layer body 20, a voltage drop will occur in the transmission process of the voltage signal. If the voltage signal is input from only one side of the electrode layer body 20, it is easy to present an obvious voltage drop on the electrode layer body 20, resulting in an obvious brightness difference on both sides of the first light-emitting layer EL1, which will make the light-emitting brightness of the entire light-emitting panel 1000 uneven, with one end bright and the other end dark. Therefore, the two first connection portions L1 included in each first connection portion pair D1 are arranged on opposite sides of the electrode layer body 20, which can avoid the voltage signal from causing excessive impedance and generating a voltage drop during the transmission process, which is conducive to the synchronous transmission of the same signal by the voltage signal from the opposite sides of the electrode layer body 20, which helps to reduce the impact of the voltage drop, and further helps to improve the uniformity of the light-emitting brightness of the light-emitting panel.

[0112] In some embodiments, the first electrode layer 201 includes at least one second connection portion pair D2, and each second connection portion pair D2 includes two second connection portions L2 disposed on opposite sides of the electrode layer body 20. This can improve the uniformity of the light emitting brightness of the light emitting panel 1000.

[0113] In some embodiments, the first electrode layer 201 includes at least one third connection portion pair D3, and each third connection portion pair D3 includes two third connection portions L3 disposed on opposite sides of the electrode layer body 20. This can improve the uniformity of the light emitting brightness of the light emitting panel 1000.

[0114] In some embodiments, the first electrode layer 201 includes at least one first connection portion pair D1 and at least one second connection portion pair D2; wherein the two first connection portions L1 included in each first connection portion pair D1 are disposed on opposite sides of the electrode layer body 20, and the two second connection portions L2 included in each second connection portion pair D2 are disposed on opposite sides of the electrode layer body 20. Alternatively, the first electrode layer 201 includes at least one first connection portion pair D1 and at least one third connection portion pair D3; wherein the two first connection portions L1 included in each first connection portion pair D1 are disposed on opposite sides of the electrode layer body 20, and the two third connection portions L3 included in each third connection portion pair D3 are disposed on opposite sides of the electrode layer body 20. Alternatively, the first electrode layer 201 includes at least one second connection portion pair D2 and at least one third connection portion pair D3; wherein the two second connection portions L2 included in each second connection portion pair D2 are disposed on opposite sides of the electrode layer body 20, and the two third connection portions L3 included in each third connection portion pair D3 are disposed on opposite sides of the electrode layer body 20. Alternatively, the first electrode layer 201 includes at least one second connection portion pair D2, at least one third connection portion pair D3, and at least one third connection portion pair D3; wherein, the two first connection portions L1 included in each first connection portion pair D1 are arranged on opposite sides of the electrode layer body 20, the two second connection portions L2 included in each second connection portion pair D2 are arranged on opposite sides of the electrode layer body 20, and the two third connection portions L3 included in each third connection portion pair D3 are arranged on opposite sides of the electrode layer body 20. Both can improve the uniformity of the light emitting brightness of the light emitting panel 1000.

[0115] For example, continue to refer to Figure 5 The first electrode layer 201 includes two first connection part pairs D1, one second connection part pair D2 and one third connection part pair D3. The two first connection parts L1 included in each first connection part pair D1 are arranged on opposite sides of the electrode layer body 20; the two second connection parts L2 included in a second connection part pair D2 are arranged on opposite sides of the electrode layer body 20; and the two third connection parts L3 included in a third connection part pair D3 are arranged on opposite sides of the electrode layer body 20.

[0116] In some embodiments, reference Fig.15 , the line connecting the centers O1 of the two first connection parts L1 included in the first connection part pair D1 passes through the center O of the electrode layer body 20. This can avoid the voltage signal from generating a voltage drop due to excessive impedance during transmission, which is beneficial for the voltage signal to synchronously transmit the same signal from the opposite sides of the electrode layer body 20, helps to reduce the impact of the voltage drop, and further helps to improve the uniformity of the light emitting brightness of the light emitting panel.

[0117] In some embodiments, a line connecting the centers O2 of two second connection parts L2 included in the second connection part pair D2 passes through the center O of the electrode layer body 20. In this way, the uniformity of the light emitting brightness of the light emitting panel 1000 can be improved.

[0118] In some embodiments, a line connecting centers O3 of two third connection parts L3 included in the third connection part pair D3 passes through the center O of the electrode layer body 20. In this way, the uniformity of the light emitting brightness of the light emitting panel 1000 can be improved.

[0119] In some embodiments, the line connecting the centers O1 of the two first connection parts L1 included in the first connection part pair D1 passes through the center O of the electrode layer body 20, and the line connecting the centers O2 of the two second connection parts L2 included in the second connection part pair D2 passes through the center O of the electrode layer body 20. Alternatively, the line connecting the centers O2 of the two second connection parts L2 included in the second connection part pair D2 passes through the center O of the electrode layer body 20, and the line connecting the centers O3 of the two third connection parts L3 included in the third connection part pair D3 passes through the center O of the electrode layer body 20. Alternatively, the line connecting the centers O1 of the two first connection parts L1 included in the first connection part pair D1 passes through the center O of the electrode layer body 20, and the line connecting the centers of the two third connection parts L3 included in the third connection part pair D3 passes through the center O of the electrode layer body 20. Alternatively, the line connecting the centers O1 of the two first connection parts L1 included in the first connection part pair D1 passes through the center O of the electrode layer body 20, and the line connecting the centers O2 of the two second connection parts L2 included in the second connection part pair D2 passes through the center O of the electrode layer body 20, and the line connecting the centers O3 of the two third connection parts L3 included in the third connection part pair D3 passes through the center O of the electrode layer body 20. In this way, the uniformity of the light emitting brightness of the light emitting panel 1000 can be improved.

[0120] Exemplary, reference Fig.15 , a line connecting the centers O1 of the two first connection parts L1 included in the first connection part pair D1 passes through the center O of the electrode layer body 20; and a line connecting the centers O2 of the two second connection parts L2 included in the second connection part pair D2 passes through the center O of the electrode layer body 20; and a line connecting the centers O3 of the two third connection parts L3 included in the third connection part pair D3 passes through the center O of the electrode layer body 20.

[0121] In some embodiments, reference may be made to Figure 5The electrode layer body 20 is an axisymmetric figure, and the axisymmetric figure has at least two symmetry axes; the two first connection parts L1 included in the first connection part pair D1 are symmetrical with respect to one symmetry axis of the electrode layer body 20. In this way, it is possible to avoid excessive impedance and voltage drop caused by the voltage signal during transmission, which is conducive to synchronous transmission of the same signal from the opposite sides of the electrode layer body 20, helping to reduce the impact of the voltage drop, and further facilitating the improvement of the uniformity of the light emitting brightness of the light emitting panel 1000.

[0122] In some embodiments, the electrode layer body 20 is an axisymmetric figure having at least two axes of symmetry; the two second connection portions L2 included in the second connection portion pair D2 are symmetrical with respect to one axis of symmetry of the electrode layer body 20 .

[0123] In some embodiments, the electrode layer body 20 is an axisymmetric figure having at least two axes of symmetry; the two third connection portions L3 included in the third connection portion pair D3 are symmetrical with respect to one axis of symmetry of the electrode layer body 20 .

[0124] In some embodiments, the electrode layer body 20 is an axisymmetric figure, and the axisymmetric figure has at least two axes of symmetry; wherein the two first connection parts L1 included in the first connection part pair D1 are symmetrical with respect to one axis of symmetry of the electrode layer body 20, and the two second connection parts L2 included in the second connection part pair D2 are symmetrical with respect to one axis of symmetry of the electrode layer body 20. Alternatively, the two first connection parts L1 included in the first connection part pair D1 are symmetrical with respect to one axis of symmetry of the electrode layer body 20, and the two third connection parts L3 included in the third connection part pair D3 are symmetrical with respect to one axis of symmetry of the electrode layer body 20. Alternatively, the two second connection parts L2 included in the second connection part pair D2 are symmetrical with respect to one axis of symmetry of the electrode layer body 20, and the two third connection parts L3 included in the third connection part pair D3 are symmetrical with respect to one axis of symmetry of the electrode layer body 20. Alternatively, the two first connection portions L1 included in the first connection portion pair D1 are symmetrical with respect to a symmetric axis of the electrode layer body 20, and the two second connection portions L2 included in the second connection portion pair D2 are symmetrical with respect to a symmetric axis of the electrode layer body 20, and the two third connection portions L3 included in the third connection portion pair D3 are symmetrical with respect to a symmetric axis of the electrode layer body 20. Both can improve the uniformity of the light emitting brightness of the light emitting panel 1000.

[0125] Among them, the axially symmetrical figures can include rectangles, squares, regular hexagons, regular octagons or circles, etc. The axially symmetrical figures can also be ring-shaped, such as a rectangular ring, a square ring, a regular hexagonal ring, a regular octagonal ring or a circular ring, etc.

[0126] Exemplary, reference Figure 5The electrode layer body 20 is rectangular and has two symmetry axes, namely the first symmetry axis X1 and the second symmetry axis X2. The two first connection parts L1 included in the first connection part pair D1 are symmetric with respect to the first symmetry axis X1 of the electrode layer body 20; and the two second connection parts L2 included in the second connection part pair D2 are symmetric with respect to the first symmetry axis X1 of the electrode layer body 20; and the two third connection parts L3 included in the third connection part pair D3 are symmetric with respect to the second symmetry axis X2 of the electrode layer body 20.

[0127] Exemplary, reference Fig.16 The electrode layer body 20 is a regular hexagon with at least three symmetry axes, namely, a first symmetry axis Y1, a second symmetry axis Y2, and a third symmetry axis Y3. The two first connection portions L1 included in the first connection portion pair D1 are symmetric with respect to the first symmetry axis Y1 of the electrode layer body 20; the two second connection portions L2 included in the second connection portion pair D2 are symmetric with respect to the second symmetry axis Y2 of the electrode layer body 20; and the two third connection portions L3 included in the third connection portion pair D3 are symmetric with respect to the first symmetry axis Y1 of the electrode layer body 20.

[0128] In some embodiments, the number of the first connection portion L1, the second connection portion L2 and the third connection portion L3 are at least two, and the first connection portion L1, the second connection portion L2 and the third connection portion L3 are periodically arranged along the circumference of the electrode layer body 20. In this way, while ensuring the reliability of the electrical connection of the light-emitting panel 1000, it is also possible to avoid the problem that the voltage drop at various parts of the electrode layer body 20 is uneven, which causes the light-emitting panel 1000 to emit excessive local current when emitting light, thereby causing the light-emitting panel 1000 to emit excessive light locally, resulting in uneven brightness display of the light-emitting panel 1000. Therefore, the first connection portion L1, the second connection portion L2 and the third connection portion L3 are periodically arranged along the circumference of the electrode layer body 20, which can improve the uniformity of the light-emitting brightness of the light-emitting panel 1000.

[0129] The above-mentioned “the first connection part L1, the second connection part L2 and the third connection part L3 are periodically arranged along the circumference of the electrode layer body 20” may mean that along the circumference of the electrode layer body 20, at least two first connection parts L1, at least two second connection parts L2 and at least two third connection parts L3 are arranged in sequence in the order of: first connection part L1, second connection part L2, third connection part L3, first connection part L1, second connection part L2, third connection part L3…

[0130] Exemplary, reference Fig.16 , the electrode layer body 20 is a regular hexagon; Fig.17 , the electrode layer body 20 is circular; or refer to Fig.18The electrode layer body 20 is in a circular shape. The number of the first connection portion L1, the second connection portion L2 and the third connection portion L3 are both two, and the first connection portion L1, the second connection portion L2 and the third connection portion L3 are periodically arranged along the circumference of the electrode layer body 20.

[0131] In some embodiments, the electrode layer body 20, the first connection portion L1, the second connection portion L2 and the third connection portion L3 are made of the same material; among the electrode layer body 20, the second electrode layer 202 and the third electrode layer 203, the area of ​​the connection portion connected to any two of the electrode layer body 20, the second electrode layer 202 and the third electrode layer 203 with unequal square resistances is greater than the area of ​​the connection portion connected to the electrode layer with a relatively larger square resistance. Since the area of ​​the region where the connection portion is arranged along the circumference of the electrode layer body 20 is constant when the shape of the electrode layer body 20 is constant, when the area of ​​the connection portion connected to the electrode layer with a relatively larger square resistance is greater than the area of ​​the connection portion connected to the electrode layer with a relatively smaller square resistance, it is beneficial to reduce the resistance between the electrode layer with a relatively larger square resistance and the connection portion connected thereto, which is beneficial to improve the overall voltage drop of the entire light-emitting panel 1000.

[0132] It should be noted that square resistance refers to the resistance of a film material with a certain film thickness, the same length and width, also known as sheet resistivity or area resistivity.

[0133] In some embodiments, the square resistance of the electrode layer body 20 is greater than the square resistance of the second electrode layer 202, and the area of ​​the first connection portion L is greater than the area of ​​the second connection portion L2. This is beneficial to improving the overall voltage drop of the entire light-emitting panel 1000.

[0134] In some embodiments, the square resistance of the electrode layer body 20 is greater than the square resistance of the third electrode layer 203, and the area of ​​the first connection portion L1 is greater than the area of ​​the third connection portion L3. This is beneficial to improve the overall voltage drop of the entire light emitting panel 1000.

[0135] In some embodiments, the square resistance of the second electrode layer 202 is greater than the square resistance of the third electrode layer 203, and the area of ​​the second connection portion L2 is greater than the area of ​​the third connection portion L3. This is beneficial to improving the overall voltage drop of the entire light-emitting panel 1000.

[0136] In some embodiments, the square resistance of the electrode layer body 20 is greater than the square resistance of the second electrode layer 202, the area of ​​the first connection portion L is greater than the area of ​​the second connection portion L2, and the square resistance of the electrode layer body 20 is greater than the square resistance of the third electrode layer 203, and the area of ​​the first connection portion L1 is greater than the area of ​​the third connection portion L3. Alternatively, the square resistance of the electrode layer body 20 is greater than the square resistance of the second electrode layer 202, the area of ​​the first connection portion L is greater than the area of ​​the second connection portion L2, and the square resistance of the second electrode layer 202 is greater than the square resistance of the third electrode layer 203, and the area of ​​the second connection portion L2 is greater than the area of ​​the second connection portion L3. Alternatively, the square resistance of the electrode layer body 20 is greater than the square resistance of the third electrode layer 203, the area of ​​the first connection portion L1 is greater than the area of ​​the third connection portion L3, and the square resistance of the second electrode layer 203 is greater than the square resistance of the third electrode layer 202, and the area of ​​the second connection portion L2 is greater than the area of ​​the third connection portion L3. Alternatively, the square resistance of the electrode layer body 20 is greater than the square resistance of the second electrode layer 202, and the area of ​​the first connection portion L is greater than the area of ​​the second connection portion L2; and the square resistance of the electrode layer body 20 is greater than the square resistance of the third electrode layer 203, and the area of ​​the first connection portion L1 is greater than the area of ​​the third connection portion L3; and the square resistance of the second electrode layer 202 is greater than the square resistance of the third electrode layer 203, and the area of ​​the second connection portion L2 is greater than the area of ​​the third connection portion L3. This is conducive to improving the overall voltage drop of the entire light-emitting panel 1000.

[0137] For example, the materials of the electrode layer body 20, the first connection portion L1, the second connection portion L2 and the third connection portion L3 are all indium tin oxide (ITO), and the sheet resistance of the electrode layer body 20 is 22.5. The material of the second electrode layer 202 is magnesium silver alloy (MgAg), and the sheet resistance of the second electrode layer 202 is 5. The material of the third electrode layer 203 is aluminum, and the sheet resistance of the third electrode layer 203 is 0.06.

[0138] In this case, refer to Figure 5 The square resistance of the electrode layer body 20 is greater than the square resistance of the second electrode layer 202, and the area of ​​the first connection part L is greater than the area of ​​the second connection part L2; the square resistance of the electrode layer body 20 is greater than the square resistance of the third electrode layer 203, and the area of ​​the first connection part L1 is greater than the area of ​​the third connection part L3; the square resistance of the second electrode layer 202 is greater than the square resistance of the third electrode layer 203, and the area of ​​the second connection part L2 is greater than the area of ​​the third connection part L3.

[0139] In some embodiments, the electrode layer body 20 is in a rectangular shape; at least two of the first connection portion L1, the second connection portion L2, and the third connection portion L3 are disposed on one side of each long side of the electrode layer body 20; at least one of the first connection portion L1, the second connection portion L2, and the third connection portion L3 is disposed on one side of each short side of the electrode layer body 20; and the number of connection portions disposed on one side of each long side of the electrode layer body 20 is greater than the number of connection portions disposed on one side of each short side of the electrode layer body 20. This is conducive to improving the overall voltage drop of the entire light-emitting panel 1000.

[0140] Exemplary, reference Fig.15 The shape of the electrode layer body 20 is a rectangle; a first connection part L1 and a second connection part L2 are arranged on one side of each long side of the electrode layer body 20; a second connection part L2 and a third connection part L3 are arranged on one side of each short side of the electrode layer body 20; and, the number of connection parts arranged on one side of each long side of the electrode layer body 20 is 3, and the number of connection parts arranged on one side of each short side of the electrode layer body 20 is 2.

[0141] In some embodiments, continue to refer to Figure 5 The electrode layer body 20 has a first symmetric axis X1 parallel to the length direction of the electrode layer body 20, and a second symmetric axis X2 parallel to the width direction of the electrode layer body 20; the first connection portion L1, the second connection portion L2 and the third connection portion L3 are all symmetrically arranged relative to the first symmetric axis X1 or the second symmetric axis X2. In this way, the voltage signal can be prevented from generating a voltage drop due to excessive impedance during transmission, which is conducive to synchronously transmitting the same signal from the opposite sides of the light-emitting panel 1000, helping to reduce the impact of the voltage drop, and further facilitating the improvement of the uniformity of the light-emitting brightness of the light-emitting panel 1000.

[0142] In some embodiments, reference may be made to Fig.15 The connecting line of the center O1 of the first connection part L1 located at the opposite sides of the electrode layer body 20, the connecting line of the center O2 of the second connection part L2 located at the opposite sides of the electrode layer body 20, and the connecting line of the center O3 of the third connection part L3 located at the opposite sides of the electrode layer body 20 all pass through the center O of the electrode layer body 20. This is conducive to improving the uniformity of the light emitting brightness of the light emitting panel 1000.

[0143] In some embodiments, the shape of the electrode layer body 20 is a regular N-gon, N is an even number and N is greater than or equal to 4; a connection portion is provided on one side of each side of the electrode layer body 20; the first connection portion L1, the second connection portion L2 and the third connection portion L3 are all symmetrically arranged relative to a symmetry axis of the electrode layer body 20. This is conducive to synchronously transmitting the same signal from the opposite sides of the light-emitting panel 1000, helping to reduce the impact of the voltage drop, and further facilitating the improvement of the uniformity of the light-emitting brightness of the light-emitting panel 1000.

[0144] Exemplary, reference Figure 5 The electrode layer body 20 is in a rectangular shape. The first connection portion L1 , the second connection portion L2 , and the third connection portion L3 are all symmetrically arranged relative to a symmetry axis of the electrode layer body 20 .

[0145] Exemplary, reference Fig.16 The shape of the electrode layer body 20 is a regular hexagon. The first connection portion L1, the second connection portion L2 and the third connection portion L3 are all symmetrically arranged relative to a symmetry axis of the electrode layer body 20.

[0146] Exemplary, reference Fig.17 The electrode layer body 20 is circular in shape. The first connection portion L1 , the second connection portion L2 and the third connection portion L3 are all symmetrically arranged relative to a symmetry axis of the electrode layer body 20 .

[0147] Exemplary, reference Fig.18 The electrode layer body 20 is annular. The first connection portion L1 , the second connection portion L2 and the third connection portion L3 are all symmetrically arranged relative to a symmetry axis of the electrode layer body 20 .

[0148] Exemplary, reference Fig.19 The electrode layer body 20 is a regular octagon. The first connection portion L1, the second connection portion L2 and the third connection portion L3 are all symmetrically arranged relative to a symmetry axis of the electrode layer body 20.

[0149] In some embodiments, the shape of the electrode layer body 20 is circular or annular; an even number of first connection parts L1, an even number of second connection parts L2, and an even number of third connection parts L3 are arranged outside the circular boundary or the outer boundary of the annular shape; the first connection parts L1, the second connection parts L2, and the third connection parts L3 are all symmetrically arranged relative to a symmetry axis of the electrode layer body 20. This is conducive to synchronously transmitting the same signal from the opposite sides of the light-emitting panel 1000, helping to reduce the impact of the voltage drop, and thus helping to improve the uniformity of the light-emitting brightness of the light-emitting panel 1000.

[0150] Exemplary, reference Fig.17The shape of the electrode layer body 20 is circular; two first connection parts L1, two second connection parts L2 and two third connection parts L3 are arranged outside the boundary of the circle; the first connection part L1, the second connection part L2 and the third connection part L3 are all symmetrically arranged relative to a symmetry axis Z of the electrode layer body 20.

[0151] Exemplary, reference Fig.18 The electrode layer body 20 is in the shape of a ring; two first connection parts L1, two second connection parts L2 and two third connection parts L3 are arranged outside the outer boundary of the ring; the first connection part L1, the second connection part L2 and the third connection part L3 are all symmetrically arranged relative to a symmetry axis Z of the electrode layer body 20.

[0152] In some embodiments, the electrode layer body 20 is in the shape of a ring; at least two of the first connection part L1, the second connection part L2 and the third connection part L3 are arranged on the outside of the outer boundary of the electrode layer body 20; at least one of the first connection part L1, the second connection part L2 and the third connection part L3 is arranged on the inside of the inner boundary of the electrode layer body 20; and the first connection part L1, the second connection part L2 and the third connection part L3 located at the outer boundary or the inner boundary are symmetrically arranged relative to a symmetry axis of the electrode layer body 20.

[0153] Exemplary, reference Fig. 20 The electrode layer body 20 is in the shape of a ring; a first connection portion L1 and a third connection portion L3 are arranged on the outside of the outer boundary of the electrode layer body 20; a second connection portion L2 is arranged on the inside of the inner boundary of the electrode layer body 20; and the first connection portion L1 and the third connection portion L3 located at the outer boundary or the inner boundary are symmetrically arranged relative to a symmetry axis Z of the electrode layer body 20.

[0154] Exemplary, reference Fig.21 The electrode layer body 20 is in the shape of a ring; the first connection part L1, the second connection part L2 and the third connection part L3 are arranged on the outside of the outer boundary of the electrode layer body 20; the first connection part L1, the second connection part L2 and the third connection part L3 are arranged on the inside of the inner boundary of the electrode layer body 20; and the first connection part L1, the second connection part L2 and the third connection part L3 located at the outer boundary or the inner boundary are symmetrically arranged relative to a symmetry axis Z of the electrode layer body 20.

[0155] In some embodiments, reference Fig.21 Along the radial direction of the electrode layer body 20, the first connection portion L1 located at the outer boundary overlaps with the first connection portion L1 located at the inner boundary; the second connection portion L2 located at the outer boundary overlaps with the second connection portion L2 located at the inner boundary; the third connection portion L3 located at the outer boundary overlaps with the third connection portion L3 located at the inner boundary.

[0156] In some embodiments, reference Fig. 22 Along the radial direction of the electrode layer body 20, the first connection portion L1 located at the outer boundary overlaps with the second connection portion L2 and the third connection portion L3 located at the inner boundary; the second connection portion L2 located at the outer boundary overlaps with the first connection portion L1 and the third connection portion L3 located at the inner boundary; the third connection portion L3 located at the outer boundary overlaps with the first connection portion L1 and the second connection portion L2 located at the inner boundary.

[0157] Combined with reference Fig.10 , Fig.11 , Fig.12 and Fig.13 In the case where the light-emitting panel 1000 includes a substrate 100, a first electrode layer 201, a first light-emitting layer EL1, a second electrode layer 202, a second light-emitting layer EL2, a third electrode layer 203, a third light-emitting layer EL3 and a fourth electrode layer 204, the number of fourth connection portions L4 overlapping the fourth electrode layer 204 is at least two, and the fourth connection portions L4 are not adjacent to each other along the circumference of the electrode layer body 20. In this way, on the one hand, there are at least two connection terminals between the fourth electrode layer 204 and the external power supply, thereby improving the reliability of the electrical connection between the fourth electrode layer 204 and the external power supply, and further, the light-emitting panel 1000 can achieve the function of adjustable color temperature while taking into account high connection reliability. On the other hand, since the fourth connection portions L4 are not adjacent to each other along the circumference of the electrode layer body 20, the uniformity of the light-emitting brightness of the light-emitting panel 1000 can be improved.

[0158] The embodiment of the present disclosure also provides a light emitting device M, referring to Fig.23 The light-emitting device M includes: a light-emitting panel 1000 and a controller Q as described in any of the above embodiments, and the controller Q is connected to multiple connection parts L of the light-emitting panel 1000. For example, when the light-emitting panel 1000 includes a substrate, a first electrode layer, a first light-emitting layer, a second electrode layer, a second light-emitting layer and a third electrode layer, the controller Q is connected to the first connection part L1, the second connection part L2 and the third connection part L3, thereby realizing signal transmission between the controller Q and the electrode layer body 20, the second electrode layer 202 and the third electrode layer 203.

[0159] In the case where the light emitting panel 1000 further includes a third connection portion L3 and a fourth electrode layer 204, Fig.24 The controller Q is also connected to the fourth connection portion L4, thereby realizing signal transmission between the controller Q and the fourth electrode layer 204.

[0160] The light-emitting device M provided in the embodiment of the present invention can be applied to eye protection desk lamps, medical beauty lighting or other light-emitting devices used for lighting.

[0161] In some embodiments, the controller Q may include a flexible printed circuit (FPC), wherein the first connection part L1, the second connection part L2, the third connection part L3 and the fourth connection part L4 are all connected to the flexible printed circuit, and the flexible printed circuit inputs signals to the first connection part L1, the second connection part L2, the third connection part L3 and the fourth connection part L4 respectively to control the light-emitting panel 1000 to emit light.

[0162] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions that can be thought of by any person skilled in the art within the technical scope disclosed in the present disclosure should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A light-emitting panel, characterized in that: include: substrate; a first electrode layer disposed on one side of the substrate, the first electrode layer comprising an electrode layer body, and a plurality of connection parts disposed around the electrode layer body, the plurality of connection parts comprising a first connection part, a second connection part and a third connection part, the first connection part, the second connection part and the third connection part are disposed at intervals from each other, the electrode layer body is connected to the first connection part, and the second connection part and the third connection part are both disposed at intervals from the electrode layer body; the number of at least one of the first connection part, the second connection part and the third connection part is at least two; A first light-emitting layer, a second electrode layer, a second light-emitting layer and a third electrode layer are sequentially stacked on a side of the first electrode layer away from the substrate in a direction away from the substrate, wherein the electrode layer body, the first light-emitting layer, the second electrode layer, the second light-emitting layer and the third electrode layer overlap; the second electrode layer overlaps the second connecting portion, and the third electrode layer overlaps the third connecting portion.

2. The light emitting panel according to claim 1, characterized in that: The number of the first connection parts is at least two, and along the circumference of the electrode layer body, at least two of the first connection parts are not adjacent, and / or; The number of the second connection parts is at least two, and along the circumference of the electrode layer body, at least two of the second connection parts are not adjacent, and / or; The number of the third connection parts is at least two, and along the circumference of the electrode layer body, at least two of the third connection parts are not adjacent.

3. The light emitting panel according to claim 1 or 2, characterized in that: The first electrode layer comprises at least one first connection portion pair, and the two first connection portions included in each first connection portion pair are arranged on opposite sides of the electrode layer body; and / or, The first electrode layer comprises at least one second connection portion pair, and each second connection portion pair comprises two second connection portions disposed on opposite sides of the electrode layer body; and / or, The first electrode layer includes at least one third connection portion pair, and each third connection portion pair includes two third connection portions that are disposed on opposite sides of the electrode layer body.

4. The light emitting panel according to claim 3, characterized in that: A line connecting the centers of two first connection parts of the first connection part pair passes through the center of the electrode layer body; and / or, A line connecting the centers of two second connection portions included in the second connection portion pair passes through the center of the electrode layer body; and / or, A line connecting centers of two third connection portions included in the third connection portion pair passes through the center of the electrode layer body.

5. The light emitting panel according to claim 3, characterized in that: The electrode layer body is an axisymmetric figure, and the axisymmetric figure has at least two symmetry axes; The two first connection portions included in the first connection portion pair are symmetrical with respect to a symmetry axis of the electrode layer body; and / or, The two second connection portions included in the second connection portion pair are symmetrical with respect to a symmetry axis of the electrode layer body; and / or, The two third connection portions included in the third connection portion pair are symmetrical with respect to a symmetry axis of the electrode layer body.

6. The light emitting panel according to any one of claims 1 to 5, characterized in that: The number of the first connection portion, the second connection portion and the third connection portion are all at least two, and the first connection portion, the second connection portion and the third connection portion are periodically arranged along the circumferential direction of the electrode layer body.

7. The light emitting panel according to any one of claims 1 to 6, characterized in that: The electrode layer body, the first connecting portion, the second connecting portion and the third connecting portion are made of the same material; Among the electrode layer body, the second electrode layer and the third electrode layer, for any two of the electrode layers with unequal square resistances, the area of ​​the connection portion connected to the one with relatively larger square resistance is larger than the area of ​​the connection portion connected to the one with smaller square resistance.

8. The light emitting panel according to claim 7, characterized in that: The sheet resistance of the electrode layer body is greater than the sheet resistance of the second electrode layer, and the area of ​​the first connecting portion is greater than the area of ​​the second connecting portion; and / or, The sheet resistance of the electrode layer body is greater than the sheet resistance of the third electrode layer, and the area of ​​the first connecting portion is greater than the area of ​​the third connecting portion; and / or, The sheet resistance of the second electrode layer is greater than the sheet resistance of the third electrode layer, and the area of ​​the second connecting portion is greater than the area of ​​the third connecting portion.

9. The light emitting panel according to any one of claims 1 to 8, characterized in that: The edges of the electrode layer body and the connecting portion that are close to each other are parallel to each other.

10. The light emitting panel according to claim 9, characterized in that: The shape of the electrode layer body is a rectangle; At least two of the first connection portion, the second connection portion and the third connection portion are provided on one side of each long side of the electrode layer body; At least one of the first connection portion, the second connection portion and the third connection portion is disposed on one side of each short side of the electrode layer body; and, The number of the connection parts arranged on one side of each long side of the electrode layer body is greater than the number of the connection parts arranged on one side of each short side of the electrode layer body.

11. The light emitting panel according to claim 10, characterized in that: The electrode layer body has a first symmetry axis parallel to the length direction of the electrode layer body, and a second symmetry axis parallel to the width direction of the electrode layer body; The first connection portion, the second connection portion and the third connection portion are all symmetrically arranged relative to the first symmetry axis or the second symmetry axis.

12. The light emitting panel according to claim 10, characterized in that: A line connecting the centers of the first connecting parts located on opposite sides of the electrode layer body, a line connecting the centers of the second connecting parts located on opposite sides of the electrode layer body, and a line connecting the centers of the third connecting parts located on opposite sides of the electrode layer body all pass through the center of the electrode layer body.

13. The light emitting panel according to any one of claims 1 to 8, characterized in that: The shape of the electrode layer body is a regular N-gon, where N is an even number and N is greater than or equal to 4; A connecting portion is provided on one side of each edge of the electrode layer body; The first connection portion, the second connection portion and the third connection portion are all symmetrically arranged relative to a symmetry axis of the electrode layer body.

14. The light emitting panel according to any one of claims 1 to 5, characterized in that: The shape of the electrode layer body is circular or annular; An even number of the first connection parts, an even number of the second connection parts, and an even number of the third connection parts are arranged outside the circular boundary or outside the annular outer boundary; The first connection portion, the second connection portion and the third connection portion are all symmetrically arranged relative to a symmetry axis of the electrode layer body.

15. The light emitting panel according to any one of claims 1 to 5, characterized in that: The electrode layer body is in the shape of a ring; At least two of the first connection portion, the second connection portion and the third connection portion are disposed outside the outer boundary of the electrode layer body; At least one of the first connection portion, the second connection portion and the third connection portion is disposed inside the inner boundary of the electrode layer body; and The first connection portion, the second connection portion and the third connection portion located at the outer boundary or the inner boundary are all symmetrically arranged relative to a symmetry axis of the electrode layer body.

16. The light emitting panel according to claim 15, characterized in that: Along the radial direction of the electrode layer body, the first connection portion located at the outer boundary overlaps with the first connection portion located at the inner boundary; the second connection portion located at the outer boundary overlaps with the second connection portion located at the inner boundary; the third connection portion located at the outer boundary overlaps with the third connection portion located at the inner boundary; or, Along the radial direction of the electrode layer body, the first connection portion located at the outer boundary overlaps with the second connection portion and the third connection portion located at the inner boundary; the second connection portion located at the outer boundary overlaps with the first connection portion and the third connection portion located at the inner boundary; the third connection portion located at the outer boundary overlaps with the first connection portion and the second connection portion located at the inner boundary.

17. The light emitting panel according to any one of claims 1 to 16, characterized in that: The number of the connecting parts is m, the number of the electrode layers is n, and the relationship between the number of the connecting parts and the number of the electrode layers satisfies m=kn, where k is an integer greater than or equal to 2.

18. The light emitting panel according to any one of claims 1 to 17, characterized in that: The first light-emitting layer and the second light-emitting layer emit light of different colors.

19. The light emitting panel according to any one of claims 1 to 18, characterized in that: The first electrode layer further includes a fourth connection portion disposed around the electrode layer body, wherein the fourth connection portion and the electrode layer body, the first connection portion, the second connection portion and the third connection portion are all spaced apart from each other; The light emitting panel further comprises: a third light-emitting layer and a fourth electrode layer disposed on a side of the third electrode layer away from the substrate, the third light-emitting layer being closer to the substrate than the fourth electrode layer, and the electrode layer body, the first light-emitting layer, the second electrode layer, the second light-emitting layer, the third electrode layer, the third light-emitting layer and the fourth electrode layer overlapping; The fourth electrode layer overlaps the fourth connecting portion.

20. The light emitting panel according to claim 19, characterized in that: The number of the fourth connection parts is at least two, and the fourth connection parts are not adjacent to each other along the circumference of the electrode layer body.

21. A light emitting device, characterized in that: include: The light-emitting panel according to any one of claims 1 to 20; The controller is connected to the plurality of connection parts of the light emitting panel.

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