Light-emitting device

Abstract

A light-emitting device. A supporting layer (1) of the light-emitting device comprises a first supporting portion (11) and a second supporting portion (12), wherein the second supporting portion (12) and the first supporting portion (11) enclose a polyhedral supporting structure (10) having a closed space therein. The supporting layer (1) is provided with an opening (14); a light-emitting panel (210) is arranged on the surface of the second supporting portion (12) away from the closed space; and one end of a flexible circuit board (220) is connected to the light-emitting panel (210), and the other end thereof passes through the opening (14) and is connected to a main circuit board (230) in the closed space. A plurality of light-emitting modules (2) are mounted on the same polyhedral supporting structure (10), such that the degree of integration of the light-emitting device is relatively high; and most of the flexible circuit board (220) is located in the closed space, and the part of the flexible circuit board (220) exposed to an outer surface of the polyhedral supporting structure (10) is relatively small, such that the flexible circuit board (220) can be protected, and thus the light-emitting device has high weather resistance and an attractive appearance.

Description

Light emitting device

[0001] Cross-reference to related applications

[0002] The present disclosure claims priority to Chinese Patent Application No. 202410643171.X entitled "Light emitting device" filed on May 22, 2024, the entire contents of which are incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of display, in particular to a light emitting device. BACKGROUND

[0004] Compared with LED light emitting modules, OLED light emitting modules with large area light emission have ultra-thin light weight and excellent brightness uniformity, can realize complex and fine light effects with high recognition, and effectively improve the design aesthetics and driving safety of the vehicle.

[0005] Most OLED light emitting devices are generally designed as two-dimensional planes. The three-dimensional light emitting effect can be achieved by assembling multiple two-dimensional plane OLED light emitting devices together, but the integration is poor, and the flexible circuit boards of each OLED light emitting device are difficult to shield, and the weather resistance and aesthetics are poor.

[0006] It should be noted that the information disclosed in the above BACKGROUND section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0007] The present application aims to overcome the problems of poor integration of multiple OLED light emitting modules assembled together, and poor aesthetics of the flexible circuit boards of each OLED light emitting module, and to provide a light emitting device.

[0008] According to one aspect of the present application, a light emitting device is provided, which comprises a support layer and a light emitting module. The support layer comprises a first support part and a second support part. The second support part comprises a plurality of sub-support parts, each of which is connected to the edge of the first support part. The plurality of sub-support parts and the first support part form a polyhedral support structure with a closed space. The support layer is provided with an opening. The light emitting module comprises a light emitting panel, a flexible circuit board and a main circuit board. The light emitting panel is arranged on the side of the second support part away from the closed space. The main circuit board is arranged on the side of the first support part close to the closed space. One end of the flexible circuit board is connected to the light emitting panel, and the other end is connected to the main circuit board through the opening.

[0009] In one embodiment of the present application, the opening is arranged at least at part of the sub-support parts or at the connection between at least part of the sub-support parts and the first support part.

[0010] In an embodiment of the present application, the connecting part of the first support part and the plurality of sub-support parts is provided with a bending area, and the opening is located in the bending area, and the bending area and the opening overlap the first support part and the sub-support parts.

[0011] In an embodiment of the present application, along the width direction of the opening, the center line of the opening and the center line of the bending area coincide with each other.

[0012] In an embodiment of the present application, the distance between the edge of the opening and the edge of the bending area is half of the width of the opening.

[0013] In an embodiment of the present application, the light emitting device further comprises a sealing glue, and along the width direction of the opening, the sealing glue covers at least the edge of the opening from the connecting part of the first support part and the plurality of sub-support parts.

[0014] In an embodiment of the present application, along the width direction of the opening, the sealing glue extends from the edge of the opening to both sides of the opening, covering the area of the bending area other than the opening.

[0015] In an embodiment of the present application, the sealing glue covers the opening and the area of the bending area located at the periphery of the opening.

[0016] In an embodiment of the present application, when there is a gap between the edge of the bending area and the light emitting panel, the sealing glue covers the gap and extends to the edge of the light emitting panel.

[0017] In an embodiment of the present application, the light emitting panel has a peripheral area, and the sealing glue extends to the side of the peripheral area away from the support layer.

[0018] In an embodiment of the present application, the light emitting device further comprises a decorative piece, and the decorative piece is located at the side of the sealing glue away from the support layer, and the decorative piece completely covers the opening.

[0019] In an embodiment of the present application, the polyhedral support structure satisfies the Euler formula: V-E+F=2.

[0020] Wherein, V represents the number of vertices of the polyhedral support structure, E represents the number of edges of the polyhedral support structure, and F represents the number of faces of the polyhedral support structure.

[0021] In an embodiment of the present application, the shapes of the first support part and the sub-support parts are equilateral triangles, and the plurality of sub-support parts and the first support part form a regular tetrahedral support structure with a closed space.

[0022] In an embodiment of the present application, the shapes of the first support part and the sub-support parts are squares, and the plurality of sub-support parts and the first support part form a cubic support structure with a closed space.

[0023] In one embodiment of the present application, each of the connection between the sub-supporting part and the first supporting part is provided with an opening, the light-emitting panel comprises a plurality of first light-emitting panels, and the flexible circuit board comprises a plurality of first flexible circuit boards, the plurality of first light-emitting panels are respectively arranged on the side of the sub-supporting part away from the closed space, one end of the first flexible circuit board is connected with the first light-emitting panel, and the other end of the first flexible circuit board passes through the opening and is connected with the main circuit board.

[0024] In one embodiment of the present application, the light-emitting panel comprises a plurality of first light-emitting panels and second light-emitting panels, the second light-emitting panels are flexible panels, the flexible circuit board comprises a plurality of first flexible circuit boards and at least one second flexible circuit board, the plurality of sub-supporting parts comprise first sub-supporting parts and second sub-supporting parts, the second sub-supporting parts are arranged on the top surface and at least one side surface of the cubic supporting structure, the first sub-supporting parts are arranged on the remaining side surfaces of the cubic supporting structure, the first light-emitting panels are arranged on the first sub-supporting parts, the second light-emitting panels are arranged on the second sub-supporting parts, the connection between the first sub-supporting parts and the first supporting part and the connection between the second sub-supporting parts and the first supporting part are respectively provided with an opening, one end of the first flexible circuit board and the second flexible circuit board passes through the opening and is connected with the main circuit board, the other end of the first flexible circuit board and the second flexible circuit board is respectively connected with the first light-emitting panel and the second light-emitting panel, the top surface of the cubic supporting structure is arranged opposite to the first supporting part and parallel to each other, and the side surfaces of the cubic supporting structure are perpendicular to the first supporting part and connected with each other.

[0025] In one embodiment of the present application, the second sub-supporting parts are arranged on the top surface and at least two opposite side surfaces of the cubic supporting structure.

[0026] In one embodiment of the present application, each of the sub-supporting parts protrudes away from the closed space, and the plurality of first light-emitting panels are respectively attached to the side of the sub-supporting part away from the closed space.

[0027] In one embodiment of the present application, the light-emitting device further comprises a protective glue and a waterproof glue, the protective glue is arranged on the side of the flexible circuit board away from the supporting layer, and the waterproof glue is arranged on the side of the protective glue away from the supporting layer.

[0028] In one embodiment of the present application, the light-emitting panel comprises an encapsulation layer and a light-emitting substrate, the encapsulation layer is connected with the side of the second supporting part away from the closed space through a first adhesive layer, and the light-emitting substrate is arranged on the side of the encapsulation layer away from the second supporting part.

[0029] In one embodiment of the present application, the light-emitting panel further comprises a second adhesive layer, a light filter, a third adhesive layer and a protective film, the second adhesive layer is arranged on the side of the light-emitting substrate away from the second supporting part, the light filter is arranged on the side of the second adhesive layer away from the second supporting part, the third adhesive layer is arranged on the side of the light filter away from the second supporting part, and the protective film is arranged on the side of the third adhesive layer away from the second supporting part.

[0030] The support layer of the light emitting device comprises a first support part and a second support part, the second support part and the first support part form a polyhedral support structure with a closed space, the support layer is provided with an opening, the light emitting panel is arranged on a side of the second support part away from the closed space, one end of the flexible circuit board is connected with the light emitting panel, and the other end passes through the opening and is connected with the main circuit board in the closed space. A plurality of light emitting modules are installed on the same polyhedral support structure, the integration degree of the light emitting device is high, most of the flexible circuit board is located in the closed space, and less of the flexible circuit board leaks out of the outer surface of the polyhedral support structure, so that the flexible circuit board can be protected, and the weather resistance and the appearance of the light emitting device are strong.

[0031] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0032] The drawings incorporated into the specification and forming part of the specification, show embodiments consistent with the present application, and together with the specification, serve to explain the principles of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained from these drawings without creative labor for those skilled in the art.

[0033] Fig. 1 is a structural schematic diagram of a first support part and a sub support part forming a regular tetrahedral support structure according to an embodiment of the present application.

[0034] Fig. 2 is a plan schematic diagram of a regular tetrahedral support structure in an unfolded state according to an embodiment of the present application.

[0035] Fig. 3 is a structural schematic diagram of a first support part and a sub support part forming a cubic support structure according to an embodiment of the present application.

[0036] Fig. 4 is a plan schematic diagram of a cubic support structure in an unfolded state according to an embodiment of the present application.

[0037] Fig. 5 is a cross-sectional schematic diagram of a side of a second support part away from a closed space being provided with a light emitting panel when the polyhedral support structure is a regular tetrahedral support structure according to an embodiment of the present application.

[0038] Fig. 6 is a cross-sectional schematic diagram of a side of a second support part away from a closed space being provided with a light emitting panel when the polyhedral support structure is a cubic support structure according to an embodiment of the present application.

[0039] Fig. 7 is a schematic diagram of a display panel stack according to an embodiment of the present application.

[0040] Fig. 8 is a cross-sectional schematic diagram of a light emitting substrate of a bottom emission structure according to an embodiment of the present application.

[0041] Figure 9 is a cross-sectional view of a light-emitting substrate of a top-emitting structure according to an embodiment of the present application.

[0042] Figure 10 is a schematic view of the connection of a light-emitting panel, a flexible circuit board and a main circuit board according to an embodiment of the present application when the polyhedral support structure is a regular tetrahedron support structure.

[0043] Figure 11 is a schematic view of the connection of a light-emitting panel, a flexible circuit board and a main circuit board according to an embodiment of the present application when the polyhedral support structure is a cube support structure.

[0044] Figure 12 is a plan view of a support layer according to an embodiment of the present application when the sealant covers the edge of the opening along the width direction of the opening from the connection between the first support portion and the plurality of sub-support portions.

[0045] Figure 13 is a plan view of a support layer according to an embodiment of the present application when the sealant extends from the edge of the opening to both sides of the opening, covering the area of the bending region other than the opening.

[0046] Figure 14 is a plan view of a support layer according to an embodiment of the present application when the sealant covers the edge of the bending region and the light-emitting panel, and extends to the edge of the light-emitting panel.

[0047] Figure 15 is a plan view of a support layer according to an embodiment of the present application when the sealant extends to the side of the peripheral region away from the support layer.

[0048] Figure 16 is a plan view of a support layer according to an embodiment of the present application when the sealant covers the opening and the area of the bending region located at the periphery of the opening.

[0049] Figure 17 is a plan view of a support layer according to an embodiment of the present application when the second sub-support portion is disposed on the top surface and one side surface of the cube support structure.

[0050] Figure 18 is a cross-sectional view of a light-emitting device according to an embodiment of the present application when the second sub-support portion is disposed on the top surface and one side surface of the cube support structure, and the second light-emitting panel is disposed on the second sub-support portion.

[0051] Figure 19 is a plan view of a support layer according to an embodiment of the present application when the second sub-support portion is disposed on the top surface and two side surfaces of the cube support structure.

[0052] Figure 20 is a cross-sectional view of a light-emitting device according to an embodiment of the present application when the second sub-support portion is disposed on the top surface and two side surfaces of the cube support structure, and the second light-emitting panel is disposed on the second sub-support portion.

[0053] Figure 21 is a cross-sectional view of a regular tetrahedron support structure according to an embodiment of the present application when the decorative member is disposed on the side of the sealant away from the support layer.

[0054] Fig. 22 is a cross-sectional view of a tetrahedron support structure according to an embodiment of the present application, when the decorative piece is disposed on the side of the sealant away from the support layer.

[0055] Fig. 23 is a perspective view of a tetrahedron support structure according to an embodiment of the present application, when the decorative piece is disposed on the side of the sealant away from the support layer.

[0056] In the figures: 1 - support layer, 10 - support structure, 11 - first support part, 12 - second support part, 121 - sub support part, 1211 - first sub support part, 1212 - second sub support part, 13 - bending area, 14 - opening, 2 - light emitting module, 210 - light emitting panel, 2101 - first light emitting panel, 2102 - second light emitting panel, 2103 - display area, 2104 - peripheral area, 220 - flexible circuit board, 2201 - first flexible circuit board, 2202 - second flexible circuit board, 230 - main circuit board, 240 - component, 21 - first adhesive layer, 22 - encapsulation layer, 23 - light emitting substrate, 231 - substrate, 232 - drive circuit layer, 2321 - gate layer, 2322 - gate insulating layer, 2323 - active layer, 2324 - interlayer dielectric layer, 2325 - source-drain metal layer, 2326 - planarization layer, 233 - light emitting layer, 2331 - pixel electrode, 2332 - light emitting material layer, 2333 - common electrode, 24 - second adhesive layer, 25 - filter film, 26 - third adhesive layer, 27 - protective film, 3 - sealant, 4 - decorative piece. DETAILED DESCRIPTION

[0057] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example implementations to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and descriptions of the same elements will be omitted from descriptions of subsequent figures. In addition, the drawings are only schematic and are non-limiting.

[0058] Although relative terms such as "upper", "lower", etc. are used herein to describe one component's relationship to another component of the icon, these terms are used herein for convenience only and are not intended to be limiting. It is to be understood that if the icon is turned over, the component described as being "upper" would then be "lower". When a structure is "on" another structure, it can mean that the structure is formed integrally with the other structure or that the structure is "directly" on the other structure or that the structure is "indirectly" on the other structure via another structure.

[0059] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0060] OLED taillight technology represents a significant innovation in automotive lighting, achieving remarkable technological advancements and market applications in recent years. OLED taillights are favored for their ultra-thin, lightweight design and excellent brightness uniformity. Compared to traditional LED light-emitting modules, large-area OLED modules can achieve complex, intricate, and highly recognizable lighting effects, significantly enhancing the aesthetics of automotive design and driving safety. As shown in the figure, current mainstream OLED taillights in the automotive lighting field generally employ two-dimensional planar OLED light-emitting devices, which to some extent limits the full potential of OLED taillights to realize their unique advantages. While assembling multiple two-dimensional planar OLED light-emitting devices together can achieve a three-dimensional lighting effect, the integration is poor, and the flexible circuit boards of each OLED device are difficult to shield, resulting in poor weather resistance and aesthetics.

[0061] Based on this, the present invention provides a display panel. As shown in Figures 1 to 23, the light-emitting device includes a support layer 1 and a light-emitting module 2. The support layer 1 includes a first support portion 11 and a second support portion 12. The second support portion 12 includes a plurality of sub-support portions 121, which are respectively connected to the edge of the first support portion 11. The plurality of sub-support portions 121 and the first support portion 11 form a polyhedral support structure 10 with a closed space. An opening 14 is provided on the support layer 1. The light-emitting module 2 includes a light-emitting panel 210, a flexible circuit board 220, and a main circuit board 230. The light-emitting panel 210 is disposed on the side of the second support portion 12 away from the closed space, and the main circuit board 230 is disposed on the side of the first support portion 11 close to the closed space. One end of the flexible circuit board 220 is connected to the light-emitting panel 210, and the other end passes through the opening 14 and is connected to the main circuit board 230.

[0062] The second support part 12 and the first support part 11 form a polyhedral support structure 10 with a closed space, the support layer 1 is provided with an opening 14, the light-emitting panel 210 is arranged on a side of the second support part 12 away from the closed space, one end of the flexible circuit board 220 is connected with the light-emitting panel 210, and the other end passes through the opening 14 and is connected with the main circuit board 230 in the closed space. A plurality of light-emitting modules 2 are installed on the same polyhedral support structure 10, the integration degree of the light-emitting device is high, most of the flexible circuit board 220 is located in the closed space, and less leaks out of the outer surface of the polyhedral support structure 10, and the weather resistance and aesthetics of the light-emitting device are strong.

[0063] The light-emitting device related to the embodiments of the present application will be described in detail below in combination with specific examples.

[0064] As shown in FIGS. 1-6, the light-emitting device can include a first support part 11 and a second support part 12, the second support part 12 includes a plurality of sub-support parts 121, the plurality of sub-support parts 121 are respectively connected with edges of the first support part 11, the first support part 11 is provided with a bending area 13 at the connection with the plurality of sub-support parts 121, and the bending area 13 overlaps with the first support part 11 and the sub-support parts 121. The plurality of sub-support parts 121 and the first support part 11 are bent at the bending area 13 to form a polyhedral support structure 10 with a closed space. The light-emitting device further includes a light-emitting module 2, the light-emitting module 2 can include a light-emitting panel 210, and the light-emitting panel 210 is arranged on a side of the second support part 12 away from the closed space.

[0065] The light-emitting device is closely attached to the overall structure of the vehicle through the first support part 11. A double-sided adhesive with high strength performance is used to ensure firm connection and stability between the two, and the adhesive process is designed to provide durable and reliable interface adhesion and adapt to dynamic stress changes under various driving environments.

[0066] The second support part 12 not only bears the physical support of the light-emitting panel 210, but also performs the actual attachment and assembly of the light-emitting panel 210 through the first adhesive layer 21 to ensure efficient energy transfer and mechanical coupling between the light-emitting panel 210 and the second support part 12. It should be noted that the first adhesive layer 21 can use double-sided adhesive or thermal conductive adhesive. The bending area 13 needs to provide an effective mechanical cushioning and protection mechanism to ensure that the structural integrity and long-term use reliability of the light-emitting device are maintained under frequent or extreme bending operations.

[0067] Therefore, the selection of the material of the support layer 1 is crucial, and the material used by the support layer 1 includes but is not limited to a series of high-performance alloys, such as stainless steel with excellent corrosion resistance, lightweight and high-strength aluminum alloy, and titanium alloy with excellent strength-to-weight ratio. In addition, carbon fiber composites can also be incorporated into the alloy to optimize the overall structural performance of the support layer 1 by taking advantage of their excellent stiffness and fatigue resistance.

[0068] The material of the support layer 1 has high thermal conductivity, which can effectively transfer the heat generated by the main circuit board 230 during operation to the support layer 1 and further diffuse outward, thereby achieving efficient heat dissipation and effectively preventing overheating, ensuring the working stability and reliability of the entire light emitting device and prolonging the service life of the light emitting device.

[0069] As shown in FIGS. 5 to 7, the light emitting panel 210 includes an encapsulation layer 22, a light emitting substrate 23, a second adhesive layer 24, a filter film 25, a third adhesive layer 26, and a protective film 27, the encapsulation layer 22 is connected to the side of the second support portion 12 away from the closed space through the first adhesive layer 21, the light emitting substrate 23 is arranged on the side of the encapsulation layer 22 away from the second support portion 12, the second adhesive layer 24 is arranged on the side of the light emitting substrate 23 away from the second support portion 12, the filter film 25 is arranged on the side of the second adhesive layer 24 away from the second support portion 12, the third adhesive layer 26 is arranged on the side of the filter film 25 away from the second support portion 12, and the protective film 27 is arranged on the side of the third adhesive layer 26 away from the second support portion 12.

[0070] As shown in FIGS. 8 and 9, the light emitting substrate 23 can include a substrate 231 and a driving circuit layer 232, the driving circuit layer 232 includes a gate layer 2321, a gate insulating layer 2322, an active layer 2323, an interlayer dielectric layer 2324, a source-drain metal layer 2325, and a planarization layer 2326, the light emitting layer 233 includes a pixel electrode 2331, a light emitting material layer 2332, and a common electrode 2333, the gate insulating layer 2322 is arranged on the side of the gate layer 2321 away from the substrate 231, the active layer 2323 is arranged on the side of the gate insulating layer 2322 away from the substrate 231, the interlayer dielectric layer 2324 is arranged on the side of the active layer 2323 away from the substrate 231, the source-drain metal layer 2325 is arranged on the side of the interlayer dielectric layer 2324 away from the substrate 231, and the planarization layer 2326 is arranged on the side of the source-drain metal layer 2325 away from the substrate 231.

[0071] The light-emitting substrate 23 can further include a light-emitting layer 233 including a pixel electrode 2331, a light-emitting material layer 2332, and a common electrode 2333. The pixel electrode 2331 is disposed on the side of the planarization layer 2326 away from the substrate substrate 231 and is connected to the source-drain metal layer 2325 through a via. The light-emitting material layer 2332 is disposed on the side of the pixel electrode 2331 away from the substrate substrate 231. The common electrode 2333 is disposed on the side of the light-emitting material layer 2332 away from the substrate substrate 231. It should be noted that the light-emitting layer 233 is made of an organic light-emitting diode (OLED), and organic materials are used as the light-emitting material layer 2332. When powered on, these organic materials inject, transport, and recombine carriers (electrons and holes) in the light-emitting material layer 2332 to form excitons and release energy in the form of light.

[0072] The light-emitting substrate 23 can adopt a bottom emission structure as shown in FIG. 8. In this case, the pixel electrode 2331 can be a transparent electrode, and the common electrode 2333 can be a metal electrode. The common electrode 2333 can reflect the light generated by the light-emitting material layer 2332 to the pixel electrode 2331 and pass through the pixel electrode 2331 to exit from the drive circuit layer 232. The light-emitting panel 210 can adopt a top emission structure as shown in FIG. 9. In this case, the pixel electrode 2331 can be a metal electrode, and the common electrode 2333 can be a transparent electrode. The pixel electrode 2331 can reflect the light generated by the light-emitting material layer 2332 to the common electrode 2333 and pass through the common electrode 2333 to exit. Generally, the light-emitting panel 210 can adopt a bottom emission structure because the light-emitting panel 210 has relatively low requirements for pixel density, so there is sufficient space to place the thin film transistor of the drive circuit layer 232, even if part of the light is prevented from shining, it can still meet the requirements.

[0073] The light filtering film 25 can precisely filter out specific wavelengths of light, so that the light emitting device emits red, yellow, orange and other color lights that meet regulatory requirements and have high recognition, so that the light emitting device can ensure driving safety when used as a tail light. For tail lights with different functions such as brake lights, turn signals and reverse lights, the light filtering film 25 can ensure that each light signal is clear and distinguishable, reducing the risk of traffic accidents caused by light confusion. The light filtering film 25 can also control the brightness of the light emitting device by absorbing or reflecting part of the unwanted spectrum, avoiding the problem of too bright or too dark. The light filtering film 25 helps to improve the uniformity of the light source, reducing hot spots and dark areas. The light filtering film 25 also has certain weather resistance and impact resistance, which can prevent the aging and discoloration of the tail light caused by ultraviolet radiation when the light emitting device is used as a tail light, as well as scratches, wear and other damage that may occur during use. Using a light filtering film 25 with special colors or patterns can also increase the visual appeal of the tail light.

[0074] As shown in FIGS. 10 and 11, the display module further comprises a flexible circuit board 220 and a main circuit board 230, and the main circuit board 230 is arranged on the side of the first support part 11 close to the enclosed space. The bending area 13 is provided with an opening 14, and the flexible circuit board 220 passes through the opening 14, one end of the flexible circuit board 220 is connected with the light emitting panel 210, and the other end is connected with the main circuit board 230. The opening 14 is for the flexible printed circuit (FPC) to pass through, so that the flexible circuit board 220 and the main circuit board 230 (PCB) establish electrical connection, and the electrical connection between the flexible printed circuit and the main circuit board 230 is realized more conveniently and efficiently. The main circuit board 230 (PCB), most of the flexible printed circuit, and the connection between the main circuit board 230 (PCB) and the flexible printed circuit are all located inside the enclosed space, which can protect the circuit structure of the light emitting device, and ensure that the electrical signal can be stably and completely transmitted, thereby constructing a stable and efficient electrical connection system.

[0075] As shown in FIGS. 12-16, the size of the opening 14 needs to be strictly controlled to be smaller than the corresponding bending area 13, so the opening 14 is usually arranged in the bending area 13, so as to meet the functional requirements and maximize the overall rigidity and structural stability of the support layer 1, and prevent the local strength from being weakened due to the opening 14 being too large. In the embodiment, the bending area 13, the opening 14, the first support part 11 and the sub-support part 121 overlap. Along the width direction of the opening 14, the center line of the opening 14 and the center line of the bending area 13 coincide with each other, and the center line of the opening 14 and the center line of the bending area 13 can coincide with the intersection line of the first support part 11 and the plurality of sub-support parts 121. In other embodiments, the opening 14 can also be arranged on the sub-support part 121, that is, the opening 14 only overlaps the sub-support part 121, and arranging the opening 14 in the plane can reduce the processing difficulty.

[0076] The flexible circuit board 220 and the light-emitting panel 210 are bound by anisotropic conductive film (ACF), which ensures that the flexible circuit board 220 and the light-emitting panel 210 achieve accurate and efficient electrical signal transmission at designated contact points while maintaining good mechanical stability. Anisotropic conductive film is a special film-shaped conductive adhesive with anisotropic conductive properties, that is, it only conducts in the vertical direction, but not in the plane direction. When appropriate pressure is applied, the conductive particles in the film will just contact and conduct the two electrodes to be connected, and in the non-conductive direction, the particles remain separated and do not cause short circuits.

[0077] To further enhance the protection performance and sealing performance of the flexible circuit board 220, after the flexible circuit board 220 and the light-emitting panel 210 are bound, the outer surface can be coated. First, a protective glue is coated on the side of the flexible circuit board 220 away from the support layer 1, which can provide necessary structural reinforcement for the flexible circuit board 220 and help prevent short circuits or potential damage caused by environmental factors. The protective glue can be ultraviolet curing adhesive, which is a high-molecular material that can be quickly cured by ultraviolet irradiation. Second, for waterproofing needs, waterproof glue is provided on the side of the protective glue away from the support layer 1, forming an effective waterproof barrier to ensure that moisture cannot penetrate to the internal circuit, thereby greatly improving the working reliability and service life of the light-emitting device in humid or extreme environments.

[0078] The protective glue can adopt a modified cyanoacrylate (MCL) type ultraviolet curing adhesive. This type of glue combines the properties of cyanoacrylate and ultraviolet curing. After being applied in normal state, it first relies on the rapid chemical reaction between the cyanoacrylate component and the contact surface to preliminarily position and bond, and then realizes deep curing and final high-strength bonding effect through ultraviolet irradiation, which has both the rapid positioning ability of cyanoacrylate glue and the deep curing and durability advantages of ultraviolet curing glue.

[0079] The waterproof glue has excellent sealing performance, can form an effective sealing barrier on the flexible circuit board 220 to prevent moisture from penetrating into the inside of the flexible circuit board 220 and the light-emitting panel 210. The waterproof glue has strong electrical insulation performance, not only prevents moisture from entering, but also provides good electrical insulation effect to ensure the safe isolation between the components 240 and the circuit. The waterproof glue has low viscosity, can easily fill the tiny gaps between the components 240 and the circuit of the flexible circuit board 220, and will not cause stress or deformation to the components 240 after curing. The waterproof glue has strong weather resistance: it has anti-ultraviolet, high-temperature resistance, low-temperature resistance and aging resistance, and can stably play a protective role for a long time under various climate conditions. In summary, the waterproof glue can protect the flexible circuit board 220 from moisture, humidity and other environmental pollutants, and ensure that it can maintain normal working state in harsh environments.

[0080] As shown in FIGS. 10 and 11, since the support layer 1 can have a certain rebounding tendency after being bent, the structure of the polyhedral support structure 10 formed by folding is not always particularly stable. In order to ensure the structural stability of the polyhedral support structure 10, a sealing glue 3 is arranged at the connection between the sub-support part 121 and the first support part 11. As shown in FIG. 12, along the width direction of the opening 14, the sealing glue 3 covers at least the edge of the opening 14 from the connection between the first support part 11 and the plurality of sub-support parts 121. In the case that the strength of the sealing glue 3 is sufficient, the structural stability of the polyhedral support structure 10 can be ensured. It should be noted that the width direction of the opening 14 is the x direction in FIG. 12.

[0081] As shown in FIG. 13, the width direction of the opening 14, the sealant 3 extends from the edge of the opening 14 to both sides of the opening 14, covering the area of the bending area 13 except the opening 14, avoiding any physical interference or impact of the sealant 3 on the flexible circuit board 220. As the coating area of the sealant 3 increases, the stability of the polyhedral support structure 10 can be further enhanced, and the flexible circuit board 220 can also be covered, which can further enhance the waterproof and dustproof performance of the light emitting device in complex environmental conditions, and the main circuit board 230 and the flexible circuit board 220 can be cooled through the opening 14. As shown in FIG. 14, there is usually a gap between the edge of the bending area 13 and the light emitting panel 210, the sealant 3 covers the gap and extends to the edge of the light emitting panel 210, which can further increase the coating area of the sealant 3, and further enhance the waterproof and dustproof performance of the light emitting device in complex environmental conditions.

[0082] As shown in FIG. 15, the light emitting panel 210 has a light emitting area and a peripheral area 2104 located at the periphery of the light emitting area, and the sealant 3 extends to the side of the peripheral area 2104 away from the support layer 1. The sealant 3 can cover the binding part of the light emitting panel 210 and the flexible circuit board 220, further enhancing the waterproof and dustproof performance of the light emitting device in complex environmental conditions. As shown in FIG. 16, the material of the support layer 1 usually has good heat conduction performance, so the sealant 3 can also be used to seal the opening 14 by avoiding the key conductive area of the flexible circuit board 220, that is, the sealant 3 covers the opening 14 and the area of the bending area 13 located at the periphery of the opening 14, which can prevent dust and water vapor from entering the closed space, and optimize the waterproof and dustproof performance of the light emitting device in complex environmental conditions.

[0083] The polyhedral support structure 10 satisfies the Euler formula: V-E+F=2; wherein V represents the number of vertices of the polyhedral support structure 10, E represents the number of edges of the polyhedral support structure 10, and F represents the number of faces of the polyhedral support structure 10. The polyhedral support structure 10 can be a tetrahedral support structure 10, which has 4 vertices, 6 edges and 4 faces. The polyhedral support structure 10 can also be a cubic support structure 10, which has 8 vertices, 12 edges and 6 faces. The polyhedral support structure 10 can also be an octahedral support structure, which has 6 vertices, 12 edges and 8 faces. The polyhedral support structure 10 can also be a dodecahedral support structure, which has 20 vertices, 30 edges and 12 faces.

[0084] Referring to FIG. 1 again, the first support part 11 and the sub support part 121 are regular triangles of the same size, the number of the first support part 11 can be one, and the number of the sub support part 121 can be three, so there are four triangles in total, each regular triangle shares an edge and a vertex with the other two regular triangles, and the four regular triangles form a regular tetrahedral support structure 10 after being spliced. The vertices of the four regular triangles must include four non-intersecting line segments as the four edges of the regular tetrahedral support structure 10, and together form a closed space.

[0085] The surface of the regular tetrahedral support structure 10 is smooth and continuous, that is, there is no recess in the first support part 11 and the sub support part 121, and there is no mutual intersection between the sub support part 121 and the first support part 11, which avoids the problem that the connection between the sub support part 121 and the first support part 11 is weakened after the sealant 3 is attached, so that the first light-emitting panel 2101 or the first light-emitting panel 2101 and the second light-emitting panel 2102 are misaligned, collide or interfere with each other in a long-term vibration state. Since the flexible circuit board 220 and the main circuit board 230 are both arranged in the sealed space, there should be no overlapping part or gap between the four regular triangles, that is, the four regular triangles should be completely spliced together to form a complete three-dimensional surface, so that the sealant 3 can be prevented from leaking to the connection position of the flexible circuit board 220 and the main circuit board 230 during coating.

[0086] It should be noted that the shapes of the first support part 11 and the sub support part 121 can also be four non-regular triangles of different sizes, but the sizes of the non-regular triangles need to be adapted so that they can form an irregular tetrahedral support structure 10 after being spliced. The shapes of the first support part 11 and the sub support part 121 can also be rectangles of different sizes, so that they can form a hexahedral support structure 10 after being spliced, and the shapes and sizes of the rectangles located on opposite sides of the hexahedral support structure 10 are equal.

[0087] Referring to FIG. 2 again, the value of a is the length of the edge of the first support part 11, and the value of b is the length of the opening 14, wherein the value of b is less than the value of a. The value of c is 1 / 2 of the width of the bending area 13, the distance between the edge of the opening 14 and the edge of the bending area 13 is the value of d, and the value of d is half the width of the opening 14. Since the opening 14 is arranged in the bending area 13, the value of c is greater than or equal to the value of d. In this embodiment, 2d is less than or equal to 1 mm, and 2c is less than or equal to 5 mm. Specifically, 2d can be 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm or 1 mm, and 2c can be 1 mm, 2 mm, 3 mm, 4 mm or 5 mm. If the shapes of the first support part 11 and the sub support part 121 are non-regular triangles, the lengths of the edges of the first support part 11 are a1, a2 and a3 respectively, and the lengths of the openings 14 corresponding to the first support part 11 are b1, b2 and b3 respectively, wherein b1 is less than a1, b2 is less than a2, and b3 is less than a3 (not shown in the figure).

[0088] Referring to FIG. 3 again, the first support part 11 and the sub support part 121 can have the same size square shape, the number of the first support part 11 can be one, and the number of the sub support part 121 can be five, so that a total of six squares are included, and the six squares form a cubic support structure 10 having a closed space. In the cubic support structure 10, each square has another square adjacent thereto and having the same size, and the two squares should be adjacent in an unfolded view, and each square has another square opposite thereto and having the same size, and the two squares cannot be adjacent in the unfolded view.

[0089] Referring to FIG. 4 again, the cubic support structure 10 can have the same a value, b value, c value, and d value as the tetrahedral support structure 10, and thus a detailed description thereof will not be repeated. When the first support part 11 and the sub support part 121 have a rectangular shape, the side length of the first support part 11 is a1, a2, a1, and a2, respectively, and the length of the corresponding opening 14 is b1, b2, b1, and b2, respectively, b1 is less than a1, and b2 is less than a2 (not shown in the drawing).

[0090] Referring to FIG. 10 again, when the support layer 1 forms the tetrahedral support structure 10, the light emitting panel 210 can include four first light emitting panels 2101 having a triangular shape, and each sub support part 121 has one first light emitting panel 2101 disposed on a side thereof away from the closed space. The flexible circuit board 220 includes four first flexible circuit boards 2201, one end of each of the four first flexible circuit boards 2201 is connected to the first light emitting panel 2101, and the other end of each of the four first flexible circuit boards 2201 passes through the four openings 14 and is connected to the main circuit board 230.

[0091] Referring to FIG. 11 again, the above-described structure is also applicable to the cubic support structure 10. When the support layer 1 forms the tetrahedral support structure 10, the light emitting panel 210 can include six first light emitting panels 2101 having a square shape, and the flexible circuit board 220 includes six first flexible circuit boards 2201, one end of each of the six first flexible circuit boards 2201 is connected to the first light emitting panel 2101, and the other end of each of the six first flexible circuit boards 2201 passes through the opening 14 and is connected to the main circuit board 230. It can be seen that the distance between the binding area of one of the first light emitting panels 2101 and the main circuit board 230 is relatively far, and thus the first flexible circuit board 2201 of the first light emitting panel 2101 is relatively long. Therefore, the length of the first flexible circuit board 2201 is shortened to simplify the circuit structure of the light emitting device.

[0092] As shown in FIG. 17 and FIG. 18, the light-emitting panel 210 includes a plurality of first light-emitting panels 2101 and second light-emitting panels 2102, the second light-emitting panels 2102 are flexible panels, the flexible circuit board 220 includes a plurality of first flexible circuit boards 2201 and second flexible circuit boards 2202, the second sub-supporting part 1212 is arranged on the top surface and one side surface of the cubic supporting structure 10, the first sub-supporting part 1211 is arranged on the remaining side surfaces of the cubic supporting structure 10, the plurality of sub-supporting parts 121 include the first sub-supporting part 1211 and the second sub-supporting part 1212, the first light-emitting panel 2101 is arranged on the first sub-supporting part 1211, and the second light-emitting panel 2102 is arranged on the second sub-supporting part 1212. The top surface of the cubic supporting structure 10 is arranged opposite to the first supporting part 11 and parallel to each other, and the side surfaces of the cubic supporting structure 10 are perpendicular to the first supporting part 11 and connected to each other.

[0093] The connection part of the first sub-supporting part 1211 and the second sub-supporting part 1212 with the first supporting part 11 is provided with an opening 14, one end of the first flexible circuit board 2201 and the second flexible circuit board 2202 passes through the opening 14 and is connected with the main circuit board 230, and the other end is connected with the first light-emitting panel 2101 and the second light-emitting panel 2102 respectively, the top surface of the cubic supporting structure 10 is arranged opposite to the first supporting part 11 and parallel to each other, and the side surfaces of the cubic supporting structure 10 are perpendicular to the first supporting part 11 and connected to each other.

[0094] It can be understood that the second sub-supporting part 1212 is composed of the first sub-supporting part 1211 on the top surface and the first sub-supporting part 1211 on the side surface, and the second light-emitting panel 2102 is bent at the common edge of the first sub-supporting part 1211 on the top surface and the first sub-supporting part 1211 on one side surface of the cubic supporting structure 10, and is bound with the main circuit board 230 through the opening 14 at the connection part of the first sub-supporting part 1211 on the side surface and the first supporting part 11.

[0095] The cubic supporting structure 10 eliminates the opening 14 at the connection part of the first sub-supporting part 1211 on the top surface and the first sub-supporting part 1211 on the side surface, and the distance between the binding area of the second light-emitting panel 2102 and the main circuit board 230 is greatly shortened compared with the distance between the binding area of the first light-emitting panel 2101 on the top surface and the main circuit board 230, and one flexible circuit board 220 is eliminated, the number of flexible circuit boards 220 is reduced, and the circuit structure of the light-emitting device is greatly simplified.

[0096] As shown in FIG. 19 and FIG. 20, in order to further reduce the number of flexible circuit boards 220, the second sub-supporting part 1212 is arranged on the top surface and the opposite two side surfaces of the cubic supporting structure 10. The second sub-supporting part 1212 is composed of the first sub-supporting part 1211 on the top surface and the first sub-supporting part 1211 on the opposite two side surfaces, and the second light-emitting panel 2102 is bent at the common edge of the first sub-supporting part 1211 on the top surface and the first sub-supporting part 1211 on the opposite two side surfaces of the cubic supporting structure 10, and is bound with the main circuit board 230 through the opening 14 at the connection between the first sub-supporting part 1211 on one side surface and the first supporting part 11. The cubic supporting structure 10 eliminates the opening 14 at the connection between the first sub-supporting part 1211 on the top surface and the first sub-supporting part 1211 on the opposite two side surfaces, and eliminates two flexible circuit boards 220, further reducing the number of flexible circuit boards 220, and better simplifying the circuit structure of the light-emitting device.

[0097] When the first light-emitting panel 2101 does not need to be bent, it can be a rigid OLED light-emitting panel 210, and the second light-emitting panel 2102 needs to be folded, so it can be a flexible OLED light-emitting panel 210. The rigid OLED light-emitting panel 210 usually uses a rigid material such as glass as a substrate and does not have bending or folding characteristics. The flexible OLED light-emitting panel 210 uses a flexible material such as polyimide as a substrate. Compared with the rigid OLED light-emitting panel 210, it has the ability to bend, fold, and even curl.

[0098] In order to further improve the three-dimensional effect of the light-emitting device, each sub-supporting part 121 can be arranged to protrude away from the enclosed space, and a plurality of first light-emitting panels 2101 can be respectively attached to one side of the sub-supporting part 121 away from the enclosed space. In this case, the first light-emitting panel 2101 will also be bent, and at this time the first light-emitting panel 2101 needs to be arranged as a flexible OLED light-emitting panel 210.

[0099] As shown in FIG. 21 to FIG. 23, the light-emitting device further comprises a decorative piece 4 arranged on the side of the sealing glue 3 away from the supporting layer 1, which can further fix the angle between the sub-supporting part 121 and the first supporting part 11 and the angle between adjacent sub-supporting parts 121, that is, further fix the bending angle of the supporting layer 1, thereby enhancing the structural stability of the polyhedral supporting structure 10, and also can strengthen the packaging effect, prevent potential damage to sensitive elements in the enclosed space by environmental factors, and at the same time the decorative piece 4 has a certain decorative effect, which can improve the aesthetic properties of the light-emitting device. In this embodiment, the decorative piece 4 completely covers the sealing glue 3, which can prevent the sealing glue 3 from being exposed and avoid affecting the aesthetic properties of the light-emitting device, and can further improve the strength of the light-emitting device. It should be noted that the decorative piece 4 can be a prism.

[0100] It is worth noting that the decorative piece 4 can increase the shielding range and improve the protection effect while shielding the covered area of the sealant 3. For example, when the sealant 3 is covered from the edge of the opening 14 to the connection between the first support part 11 and the plurality of sub-support parts 121, the decorative piece 4 can also completely shield the opening 14 and shield the area between the edge of the opening 14 and the edge of the bending area 13, which can prevent the circuit part in the enclosed space from being exposed and can play a certain waterproof and dustproof role.

[0101] Whether the sealant 3 covers the opening 14 or not, when the covered range of the sealant 3 extends from the edge of the opening 14 to both sides of the opening 14 along the width direction of the opening 14, the waterproof and dustproof performance of the light emitting device has been guaranteed to a certain extent, and then the decorative piece 4 can be extended to the edge of the light emitting panel 210 to shield the inevitable exposed part of the flexible circuit board 220, so that the inevitable exposed part of the flexible circuit board 220 is appropriately hidden under the decorative piece 4, which not only avoids the visual interference caused by the exposure of the flexible circuit board 220, but also greatly improves the overall appearance of the light emitting device.

[0102] It should be noted that the same or equal mentioned above means the same or equal within a certain tolerance range.

[0103] It should be noted that the light emitting device described above can be used for automobile tail lights, and of course can also be used for other purposes of lighting, which is not limited here.

[0104] It should be noted that the above embodiments are mutually communicable and can be combined to form other schemes, and the schemes of the present application are not limited to the schemes described in the above embodiments. Other embodiments of the present application will be easily conceived by those skilled in the art after considering the specification and practicing the disclosure of the present application. The present application is intended to cover any variations, uses or adaptations of the present application that follow the general principles of the present application and include known or customary technical means in the art that are not disclosed by the present application. The specification and examples are only considered as exemplary, and the true scope and spirit of the present application are indicated by the appended claims.

Claims

1. A light emitting device, comprising: The light emitting device comprises: a support layer comprising a first support part and a second support part, the second support part comprising a plurality of sub-support parts, each of the plurality of sub-support parts being connected to an edge of the first support part, the plurality of sub-support parts and the first support part forming a polyhedral support structure having a closed space, the support layer being provided with an opening; a light emitting module comprising a light emitting panel, a flexible circuit board and a main circuit board, the light emitting panel being arranged on a side of the second support part away from the closed space, the main circuit board being arranged on a side of the first support part close to the closed space, one end of the flexible circuit board being connected to the light emitting panel and the other end of the flexible circuit board being connected to the main circuit board through the opening.

2. The light emitting device of claim 1, wherein, The opening is arranged at at least part of the sub-support parts or at least part of the connection between the sub-support parts and the first support part.

3. The light emitting device of claim 2, wherein, The connection between the first support part and the plurality of sub-support parts is provided with a bending area, the opening being located in the bending area, the bending area, the opening, the first support part and the sub-support parts all overlapping each other.

4. The light emitting device of claim 3, wherein, Along the width direction of the opening, the center line of the opening and the center line of the bending area coincide with each other.

5. The light emitting device of claim 4, wherein, The distance between the edge of the opening and the edge of the bending area is half of the width of the opening.

6. The light emitting device of claim 3, wherein The light emitting device further comprises a sealing glue, along the width direction of the opening, the sealing glue is covered at least to the edge of the opening from the connection between the first support part and the plurality of sub-support parts.

7. The light emitting device of claim 6, wherein, Along the width direction of the opening, the sealing glue extends from the edge of the opening to both sides of the opening until covering the area of the bending area other than the opening.

8. The light emitting device of claim 6, wherein, The sealing glue covers the opening and the area of the bending area located outside the periphery of the opening.

9. The light emitting device according to claim 7 or 8, wherein When there is a gap between the edge of the bending area and the light emitting panel, the sealing glue covers the gap and extends to the edge of the light emitting panel.

10. The light emitting device of claim 9, wherein, The light emitting panel has a peripheral area, and the sealing glue extends to one side of the peripheral area away from the support layer.

11. The light emitting device of claim 6, wherein, The light emitting device further comprises a decorative piece, the decorative piece being arranged on the side of the sealing glue away from the support layer, and the decorative piece completely covers the opening.

12. The light emitting device according to claim 1, wherein The polyhedral support structure satisfies Euler's formula: V-E+F=2; wherein, V represents the number of vertices of the polyhedral support structure, E represents the number of edges of the polyhedral support structure, and F represents the number of faces of the polyhedral support structure.

13. The light emitting device of claim 12, wherein, The first support part and the sub-support parts are in the shape of equilateral triangles of the same size, and the plurality of sub-support parts and the first support part form a regular tetrahedral support structure having a closed space.

14. The light emitting device of claim 12, wherein, The first support part and the sub-support parts are in the shape of squares of the same size, and the plurality of sub-support parts and the first support part form a cubic support structure having a closed space.

15. The light emitting device according to claim 1, wherein, An opening is arranged at the connection between each of the sub-supporting parts and the first supporting part, the light-emitting panel comprises a plurality of first light-emitting panels, and the flexible circuit board comprises a plurality of first flexible circuit boards, the first light-emitting panels are respectively arranged on the side of the sub-supporting parts away from the closed space, one end of the first flexible circuit boards is connected with the first light-emitting panels, and the other end of the first flexible circuit boards passes through the opening and is connected with the main circuit board.

16. The light emitting device of claim 14, wherein, The light-emitting panel comprises a plurality of first light-emitting panels and at least one second light-emitting panel, the second light-emitting panel is a flexible panel, the flexible circuit board comprises a plurality of first flexible circuit boards and a second flexible circuit board, the plurality of sub-supporting parts comprises first sub-supporting parts and second sub-supporting parts, the second sub-supporting parts are arranged on the top surface and at least one side surface of the cubic supporting structure, the first sub-supporting parts are arranged on the remaining side surfaces of the cubic supporting structure, the first light-emitting panels are arranged on the first sub-supporting parts, the second light-emitting panels are arranged on the second sub-supporting parts, openings are arranged at the connections between the first sub-supporting parts and the first supporting part and the connections between the second sub-supporting parts and the first supporting part, one end of any one of the first flexible circuit boards and the second flexible circuit board passes through the opening and is connected with the main circuit board, the other end of the first flexible circuit board is connected with the first light-emitting panel, and the other end of the second flexible circuit board is connected with the second light-emitting panel, the top surface of the cubic supporting structure is arranged opposite to the first supporting part and parallel to each other, and the side surfaces of the cubic supporting structure are perpendicular to the first supporting part and connected with each other.

17. The light emitting device of claim 16, wherein, The second sub-supporting parts are arranged on the top surface and at least two opposite side surfaces of the cubic supporting structure.

18. The light emitting device according to claim 15 or 16, wherein, Each of the sub-supporting parts protrudes in the direction away from the closed space, and a plurality of first light-emitting panels are respectively attached to the side of the sub-supporting parts away from the closed space.

19. The light emitting device of claim 1, wherein, The light-emitting device further comprises a protective glue and a waterproof glue, the protective glue is arranged on the side of the flexible circuit board away from the supporting layer, and the waterproof glue is arranged on the side of the protective glue away from the supporting layer.

20. The light emitting device of claim 1, wherein, The light-emitting panel comprises an encapsulating layer and a light-emitting substrate, the encapsulating layer is connected with the side of the second supporting part away from the closed space through a first adhesive layer, and the light-emitting substrate is arranged on the side of the encapsulating layer away from the second supporting part.

21. The light emitting device of claim 20, wherein, The light-emitting panel further comprises a second adhesive layer, a light-filtering film, a third adhesive layer and a protective film, the second adhesive layer is arranged on the side of the light-emitting substrate away from the second supporting part, the light-filtering film is arranged on the side of the second adhesive layer away from the second supporting part, the third adhesive layer is arranged on the side of the light-filtering film away from the second supporting part, and the protective film is arranged on the side of the third adhesive layer away from the second supporting part.

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