Light emitting device

Abstract

The application discloses a light-emitting device, comprising: a back plate; a plurality of pairs of back plate electrodes are arranged on the surface of the back plate, each pair of back plate electrodes comprising a first electrode and a second electrode; a light-emitting unit is arranged between each pair of back plate electrodes, two electrodes of the light-emitting unit are electrically connected with the first electrode and the second electrode respectively; an electro-deformation structure is arranged between the back plate electrode and the light-emitting unit, the electro-deformation structure is electrically connected with the first electrode and the second electrode respectively; the electro-deformation structure is used for deforming when the first electrode and the second electrode are powered on, and is used for pressing the back plate electrode and / or the light-emitting unit, so that the light-emitting unit is stably connected with the back plate electrode. The application can improve the stability of the combination of the light-emitting unit and the back plate.

Description

Technical Field

[0001] This invention relates to the field of light-emitting technology, and more particularly to a light-emitting device. Background Technology

[0002] Micro light-emitting diodes (Micro LEDs) are light-emitting diodes with dimensions on the micrometer scale. Due to their small size, Micro LEDs can be used as pixels on display panels, and display panels made using Micro LEDs are called Micro LED display panels. Compared to Organic Light-Emitting Diode (OLED) display panels, Micro LED display panels have better lifespan and viewing angles, making Micro LED display technology a current research focus in the field of display technology.

[0003] However, after fabrication, Micro LEDs need to be transferred to a backplane before they can be driven to emit light. But in existing light-emitting devices, the bond between the transferred Micro LEDs and the backplane is not strong, and there is a risk of them falling off. Summary of the Invention

[0004] The present invention provides a light-emitting device to improve the stability of the bonding between the light-emitting unit and the back plate.

[0005] According to one aspect of the present invention, a light-emitting device is provided, comprising:

[0006] Backplate; the backplate surface is provided with multiple pairs of backplate electrodes, each pair of backplate electrodes including a first electrode and a second electrode; a light-emitting unit is provided between each pair of backplate electrodes, and the two electrodes of the light-emitting unit are electrically connected to the first electrode and the second electrode respectively.

[0007] An electro-deformable structure is provided between the back plate electrode and the light-emitting unit. The electro-deformable structure is electrically connected to the first electrode and the second electrode respectively. The electro-deformable structure is used to deform when the first electrode and the second electrode are energized, squeezing the back plate electrode and / or the light-emitting unit, so that the light-emitting unit is stably connected to the back plate electrode.

[0008] Optionally, the electro-deformable structure is fixedly connected to the light-emitting unit, and the electro-deformable structure squeezes the back plate electrode when it deforms; or, the electro-deformable structure is fixedly connected to the back plate electrode, and the electro-deformable structure squeezes the light-emitting unit when it deforms; or, the electro-deformable structure is reused as the back plate electrode, and the electro-deformable structure squeezes the light-emitting unit when it deforms.

[0009] Optionally, the electro-deformable structure is fixedly electrically connected to the light-emitting unit, and there is a gap between the electro-deformable structure and the back plate electrode. The longitudinal section of the gap is an inverted triangle, and when the electro-deformable structure does not deform, a portion of the area adjacent to the back plate is in contact with the back plate electrode.

[0010] Alternatively, the electro-deformable structure is fixedly electrically connected to the back plate electrode, and there is a gap between the electro-deformable structure and the light-emitting unit. The longitudinal section of the gap is an inverted triangle, wherein a portion of the electro-deformable structure adjacent to the back plate is in contact with the light-emitting unit when the electro-deformable structure is not deformed.

[0011] The longitudinal section is perpendicular to the surface of the back plate adjacent to the light-emitting unit and the surface of the back plate electrode facing the light-emitting unit.

[0012] Optionally, when the electro-deformation structure is fixedly connected to the light-emitting unit, a plurality of first grooves are provided on the surface of the back plate electrode facing the light-emitting unit, and the first grooves are used to accommodate part of the electro-deformation structure when deformation occurs.

[0013] When the electro-deformation structure is fixedly connected to the back plate electrode, the surface of the light-emitting unit facing the back plate electrode is provided with a plurality of second grooves, which are used to accommodate part of the electro-deformation structure when deformation occurs.

[0014] Optionally, when the electrodeformation structure is fixedly connected to the back plate electrode, the surface of the light-emitting unit facing the back plate electrode is the light-emitting unit electrode, and the surface of the light-emitting unit electrode facing the back plate electrode has a plurality of second grooves; or, the surface of the light-emitting unit facing the back plate electrode has a protective layer, and the surface of the protective layer facing the back plate electrode has a plurality of second grooves.

[0015] Optionally, when the surface of the light-emitting unit facing the back plate electrode has a protective layer, a conductive structure is provided on the surface of the protective layer and / or in the second groove, and the conductive structure is electrically connected to the electrode of the light-emitting unit;

[0016] The conductive structure is used for electrical connection with the electrodeformation structure.

[0017] Optionally, a shape memory layer is provided inside or on the surface of the electro-deformable structure, the shape memory layer being used to maintain the deformation after the electro-deformable structure undergoes deformation.

[0018] Optionally, the electrodeformation structure may be made of at least one of the following materials: polyethylene glycol, polyvinyl diol, barium lead zirconate titanate, and potassium sodium silicate.

[0019] Optionally, the longitudinal section of the first groove is rectangular, trapezoidal, semi-elliptical, or circular.

[0020] The longitudinal cross-section of the second groove is rectangular, trapezoidal, semi-elliptical, or circular.

[0021] The longitudinal section is perpendicular to the surface of the back plate adjacent to the light-emitting unit and the surface of the back plate electrode facing the light-emitting unit.

[0022] Optionally, the light-emitting unit includes a Micro LED or a mini LED.

[0023] The back plate surface of the light-emitting device in this embodiment of the invention is provided with multiple pairs of back plate electrodes, and a light-emitting unit is provided between each pair of back plate electrodes. An electro-deformation structure is provided between the back plate electrodes and the light-emitting unit. The electro-deformation structure is electrically connected to the first electrode and the second electrode respectively. When the first electrode and the second electrode are energized, the electro-deformation structure deforms, squeezing the back plate electrodes and / or the light-emitting unit, so that the light-emitting unit is stably connected to the back plate electrodes, thereby improving the stability of the connection between the light-emitting unit and the back plate.

[0024] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of a light-emitting device provided in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention;

[0031] Figure 6This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention;

[0034] Figure 9 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention;

[0035] Figure 10 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention;

[0036] Figure 11 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention;

[0037] Figure 12 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention;

[0038] Figure 13 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention. Detailed Implementation

[0039] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0040] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0041] This invention provides a light-emitting device. Figure 1This is a schematic diagram of a light-emitting device provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention, with reference to... Figure 1 and Figure 2 The light-emitting device includes:

[0042] Back plate 10; multiple pairs of back plate electrodes 20 are provided on the surface of the back plate 10, each pair of back plate electrodes 20 includes a first electrode 21 and a second electrode 22; a light-emitting unit 30 is provided between each pair of back plate electrodes 20, and the two electrodes of the light-emitting unit 30 are electrically connected to the first electrode 21 and the second electrode 22 respectively.

[0043] An electro-deformable structure 40 is provided between the back plate electrode 20 and the light-emitting unit 30. The electro-deformable structure 40 is electrically connected to the first electrode 21 and the second electrode 22 respectively. The electro-deformable structure 40 is used to deform when the first electrode 21 and the second electrode 22 are energized, squeezing the back plate electrode 20 and / or the light-emitting unit 40, so that the light-emitting unit 30 is stably connected to the back plate electrode 20.

[0044] The backplate 10 may include a substrate, a driving circuit, and an insulating layer covering the driving circuit. The driving circuit is electrically connected to the backplate electrode 20 and is used to transmit a driving signal to the light-emitting unit 20 through the backplate electrode 20, causing the light-emitting unit 20 to emit light. The light-emitting unit 20 can be a MicroLED or a miniLED, or other types of light-emitting units; this invention does not impose specific limitations. The electrodeformable structure 40 can be made of an electrodeformable material, which is a material that deforms under the action of an applied electric field. The deformation effect of the electrodeformable material is caused by the rearrangement of the electric dipole moments inside the material under the action of an applied electric field. Under the action of an applied electric field, the positive and negative charges inside the material will change, resulting in the generation of electric dipole moments. These electric dipole moments will interact with the applied electric field, causing the material to deform.

[0045] An electrodeformation structure 40 can be provided between each backplate electrode 20 and the light-emitting unit 30, or an electrodeformation structure 40 can be provided between one electrode of a pair of backplate electrodes 20 and the light-emitting unit 30. (Reference) Figure 1 and Figure 2The electro-deformable structure 40 can be fabricated on the back plate 10 and directly fixedly connected to it. Alternatively, the electro-deformable structure 40 can be fixedly disposed on the surface of the light-emitting unit 30 and transferred to the back plate 10 together with the light-emitting unit 30. When the electro-deformable structure 40 is fixedly disposed on the back plate 10, it deforms after being energized, compressing the light-emitting unit 30 and increasing the friction between the light-emitting unit 30 and the back plate 10, thereby improving the stability of the connection between the light-emitting unit 30 and the back plate 10. When the electro-deformable structure 40 is fixedly connected to the light-emitting unit 30, it deforms after being energized, compressing the back plate electrode 20 and increasing the friction between the light-emitting unit 30 and the back plate 10, thereby improving the stability of the connection between the light-emitting unit 30 and the back plate 10.

[0046] Furthermore, the backplate electrode 20 can be electrically connected to the light-emitting unit 30 via an electrodeformation structure 40. For example, the first electrode 21, the electrodeformation structure 40, the light-emitting unit 30, another electrodeformation structure 40, and the second electrode 22 are connected in series to form a circuit. The light-emitting unit 30 can also be directly electrically connected to the first electrode 21 and the second electrode 22. By providing leads or pads on the backplate 10, the two electrodes of the light-emitting unit 30 can be electrically connected to the first electrode 21 and the second electrode 22, respectively.

[0047] In this embodiment of the invention, the back plate 10 of the light-emitting device is provided with multiple pairs of back plate electrodes 20. A light-emitting unit 30 is provided between each pair of back plate electrodes 20. An electro-deformation structure 40 is provided between the back plate electrodes 20 and the light-emitting unit 30. The electro-deformation structure 40 is electrically connected to the first electrode 21 and the second electrode 22 respectively. When the first electrode 21 and the second electrode 22 are energized, the electro-deformation structure 40 deforms, squeezing the back plate electrodes 20 and / or the light-emitting unit 30, so that the light-emitting unit 30 is stably connected to the back plate electrodes 20, thereby improving the stability of the connection between the light-emitting unit 30 and the back plate 10.

[0048] It should be noted that, Figure 1 The illustration shows only one light-emitting unit as an example and is not intended to limit the invention.

[0049] Optional, see reference Figure 1 The electro-deformable structure 40 is fixedly connected to the light-emitting unit 30, and when the electro-deformable structure 40 deforms, it presses against the back plate electrode 20; or, refer to Figure 2 The electro-deformable structure 40 is fixedly connected to the back plate electrode 20. When the electro-deformable structure 40 deforms, it squeezes the light-emitting unit 30, or... Figure 3 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention, with reference to... Figure 3 The electro-deformable structure 40 is reused as the back electrode 20. When the electro-deformable structure 40 is deformed, it squeezes the light-emitting unit 30.

[0050] For details, please refer to Figure 1 The electro-deformable structure 40 can be fixed to the surface of the light-emitting unit 30. For example, it can be welded to the light-emitting unit 30, or it can be mechanically connected to it. For example, it can be snapped together using a slot or clip. The electro-deformable structure 40 is fixedly connected to the light-emitting unit 30 and transferred to the back plate 10 together with the light-emitting unit 30. After the electro-deformable structure 40 deforms, it presses against the back plate electrode 20, increasing the friction between the light-emitting unit 20 and the back plate 10, and improving the connection stability between the light-emitting unit 30 and the back plate 10.

[0051] refer to Figure 2 When the electro-deformable structure 40 is fixedly connected to the back plate electrode 20, the electro-deformable structure 40 can be fabricated on the surface of the back plate 10, and can be welded to the back plate electrode 20 or fixedly connected by a mechanical structure. After the electro-deformable structure 20 deforms, it squeezes the light-emitting unit 30, increasing the friction between the light-emitting unit 20 and the back plate 10, and improving the connection stability between the light-emitting unit 30 and the back plate 10.

[0052] refer to Figure 3 The electro-deformable structure 40 is reused as the back electrode 20, that is, the electro-deformable structure 40 is used as both an electro-deformable structure 40 and a back electrode 20. When the back electrode 20 is energized, it deforms and squeezes the light-emitting unit 30, increasing the friction between the light-emitting unit 20 and the back plate 10, and improving the connection stability between the light-emitting unit 30 and the back plate 10.

[0053] Specifically, leads or other wires can be provided on the back plate 10 to connect the electrodes of the light-emitting unit 30 to the back plate electrodes 20. Figure 4 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention, with reference to... Figure 4 Alternatively, a gap can be provided between the back plate electrode 20 and the light-emitting unit 30. The longitudinal section of the gap is an inverted triangle. When the back plate electrode 20 is not deformed, a part of the area adjacent to the back plate 10 contacts the light-emitting unit 30, thereby realizing the electrical connection between the back plate electrode 20 and the light-emitting unit 30 when no deformation occurs. Figure 5 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention. Figure 6 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention. Optional, see reference. Figure 5 The electro-deformable structure 40 is fixedly electrically connected to the light-emitting unit 30. A gap exists between the electro-deformable structure 40 and the backplate electrode 20, with the gap having an inverted triangular longitudinal section. When the electro-deformable structure 40 is not deformed, a portion of the area adjacent to the backplate 10 is in contact with the backplate electrode 20; or...

[0054] refer to Figure 6The electro-deformable structure 40 is fixedly electrically connected to the back plate electrode 20. There is a gap between the electro-deformable structure 40 and the light-emitting unit 30. The longitudinal section of the gap is an inverted triangle. When the electro-deformable structure is not deformed, a part of the area adjacent to the back plate is in contact with the light-emitting unit 30. The longitudinal section is perpendicular to the surface of the back plate 10 adjacent to the light-emitting unit 30 and the surface of the back plate electrode 20 facing the light-emitting unit 30.

[0055] For details, please refer to Figure 5 A gap is provided between the electro-deformable structure 40 and the back plate electrode 20, and the longitudinal section of the gap is an inverted triangle. This allows the light-emitting unit 20 to fall into the corresponding back plate electrode 20 when it is transferred. When the electro-deformable structure 40 is not deformed, a part of the area adjacent to the back plate 10 is in contact with the back plate electrode 20, so that the back plate electrode 20 can be electrically connected to the light-emitting unit 30 through the electro-deformable structure 40. An electrical connection path can be formed between the back plate electrode 20, the electro-deformable structure 40, and the light-emitting unit 30, so that the back plate electrode 20 can energize the electro-deformable structure 40 and the light-emitting unit 30.

[0056] refer to Figure 6 A gap is provided between the electro-deformable structure 40 and the light-emitting unit 30, so that when the light-emitting unit 30 is transferred to the back plate 10, it can easily fall into the corresponding electro-deformable structure 40. Furthermore, when the electro-deformable structure 40 is not deformed, a portion of the area adjacent to the back plate is in contact with the light-emitting unit 30, allowing the back plate electrode 20 to be electrically connected to the light-emitting unit 30 through the electro-deformable structure 40. An electrical connection path can be formed between the back plate electrode 20, the electro-deformable structure 40, and the light-emitting unit 30, enabling the back plate electrode 20 to energize the electro-deformable structure 40 and the light-emitting unit 30.

[0057] It should be noted that the longitudinal section of the gap can be made into an inverted triangle by tilting the surface of the electro-deformation structure 40 or tilting the surface of the back electrode 20.

[0058] In addition, refer to Figure 1 and Figure 2 The longitudinal section of the gap between the electro-deformable structure 40 and the back plate electrode 20 or the gap between the electro-deformable structure 40 and the light-emitting unit 30 can also be rectangular. In this case, a pad can be provided on the surface of the back plate 10 below the electro-deformable structure 40, and the electro-deformable structure 40 can be electrically connected to the back plate electrode 20 through the pad. This allows the back plate electrode 20 to energize the electro-deformable structure 40, so that after the electro-deformable structure 40 is deformed, it can make contact and electrical connection with the back plate electrode 20 or with the light-emitting unit 30, thereby realizing the electrical connection between the back plate electrode 20, the electro-deformable structure 40 and the light-emitting unit 20.

[0059] Figure 7This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention. Figure 8 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention. Optional, see reference. Figure 7 When the electro-deformable structure 40 is fixedly connected to the light-emitting unit 30, the back plate electrode 20 is provided with a plurality of first grooves 201 on the surface facing the light-emitting unit 30. The first grooves 201 are used to accommodate part of the electro-deformable structure 40 when deformation occurs.

[0060] refer to Figure 8 When the electro-deformable structure 40 is fixedly connected to the back plate electrode 20, the surface of the light-emitting unit 30 facing the back plate electrode 20 is provided with a plurality of second grooves 301, which are used to accommodate part of the electro-deformable structure 40 when deformation occurs.

[0061] For details, please refer to Figure 7 When the electro-deformable structure 40 deforms, part of it enters the first groove 201, which makes the friction between the electro-deformable structure 40 and the back plate electrode 20 greater and the connection more stable, making the connection between the light-emitting unit 30 and the back plate 10 more stable.

[0062] refer to Figure 8 When the electro-deformable structure 40 deforms, part of it enters the second groove 301, which makes the friction between the electro-deformable structure 40 and the light-emitting unit 30 greater and the connection more stable, making the connection between the light-emitting unit 30 and the back plate 10 more stable.

[0063] Figure 9 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention. Figure 10 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention. Optional, see reference. Figure 9 When the electrodeformation structure 40 is fixedly connected to the back plate electrode 20, the surface of the light-emitting unit 30 facing the back plate electrode 20 is the light-emitting unit electrode 31. The surface of the light-emitting unit electrode 31 facing the back plate electrode 20 has a plurality of second grooves 301, or, refer to Figure 10 The surface of the light-emitting unit 30 facing the back plate electrode 20 has a protective layer 32, and the surface of the protective layer 32 facing the back plate electrode 20 has a plurality of second grooves 301.

[0064] For details, please refer to Figure 9 The light-emitting unit electrode 31 can be disposed on the surface of the light-emitting unit 30 facing the back plate electrode 20. By providing a second groove 301 on the light-emitting unit electrode 31, the electro-deformation structure 40 can have a large contact area with the light-emitting unit electrode 31. The back plate electrode 20 can be electrically connected to the light-emitting unit electrode 31 through the electro-deformation structure 40. The electro-deformation structure 40 can transmit signals to the light-emitting unit electrode 31 in a more stable manner, ensuring that the light-emitting unit 30 emits light normally.

[0065] refer to Figure 10 By setting a protective layer 32, the light-emitting unit 30 can be prevented from being damaged after the electro-deformation structure 40 is deformed.

[0066] Optional, see reference Figure 10 When the surface of the light-emitting unit 30 facing the back plate electrode 20 has a protective layer 32, a conductive structure 302 is provided on the surface of the protective layer 32 and / or in the second groove 301, and the conductive structure 302 is electrically connected to the light-emitting unit electrode 31.

[0067] The conductive structure 302 is used for electrical connection with the electrodeformation structure 40.

[0068] Specifically, the conductive structure 302 may include a conductive film or wire disposed on the surface of the protective layer 32 or the surface of the second groove 301, or it may be a conductive protrusion or wire disposed in the second groove 301. By providing the conductive structure 302, the electrodeformation structure 40 is electrically connected to the conductive structure 302 after deformation, so that the back plate electrode 20 can directly supply power to the light-emitting unit 30 through the electrodeformation structure 40 and the conductive structure 302.

[0069] Figure 11 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention. Optional, see reference. Figure 11 A shape memory layer 50 is provided inside or on the surface of the electro-deformable structure 40, and the shape memory layer 50 is used to maintain the deformation after the electro-deformable structure 40 is deformed.

[0070] Specifically, the shape memory layer 50 can be made of shape memory material. By setting the shape memory layer 50, the electro-deformation structure 40 can maintain its deformation even after the back electrode 20 stops supplying power to it, thereby further improving the connection stability between the light-emitting unit 30 and the back plate 10.

[0071] Optionally, the electrodeformable structure may be made of at least one of the following materials: polyethylene glycol, polyvinyl alcohol, barium lead zirconate titanate, and potassium sodium silicate.

[0072] The above materials are all relatively easy to manufacture and can undergo significant deformation when energized. Using the above materials in the electro-deformation structure can reduce the difficulty of the manufacturing process and improve the connection stability between the light-emitting unit 30 and the back plate 10.

[0073] Figure 12 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention. Figure 13 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention. Optional, see reference. Figures 11-13 The longitudinal section of the second groove 301 is rectangular, trapezoidal, semi-elliptical, or circular.

[0074] Specifically, rectangular, trapezoidal, semi-elliptical, and circular grooves are relatively easy to manufacture. Setting the second groove 301 with the above shapes can reduce the difficulty of the process.

[0075] Optionally, the shape of the vertical projection of the first groove onto the back plate surface can be rectangular, trapezoidal, semi-elliptical, or circular, which can reduce the difficulty of the process.

[0076] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0077] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A light-emitting device, characterized in that, include: Backplate; the backplate surface is provided with multiple pairs of backplate electrodes, each pair of backplate electrodes including a first electrode and a second electrode; a light-emitting unit is provided between each pair of backplate electrodes, and the two electrodes of the light-emitting unit are electrically connected to the first electrode and the second electrode respectively. An electro-deformable structure is provided between the backplate electrode and the light-emitting unit, and the electro-deformable structure is electrically connected to the first electrode and the second electrode respectively; or, the backplate electrode is reused as an electro-deformable structure. The electro-deformable structure is used to deform when the first electrode and the second electrode are energized, squeezing the back plate electrode and / or the light-emitting unit, so that the light-emitting unit is stably connected to the back plate electrode.

2. The light-emitting device according to claim 1, characterized in that: The electro-deformable structure is fixedly connected to the light-emitting unit, and when the electro-deformable structure deforms, it squeezes the back plate electrode; or, the electro-deformable structure is fixedly connected to the back plate electrode, and when the electro-deformable structure deforms, it squeezes the light-emitting unit.

3. The light-emitting device according to claim 1, characterized in that: The electro-deformable structure is fixedly electrically connected to the light-emitting unit. There is a gap between the electro-deformable structure and the back plate electrode. The longitudinal section of the gap is an inverted triangle. When the electro-deformable structure does not deform, a part of the area adjacent to the back plate is in contact with the back plate electrode. Alternatively, the electro-deformable structure is fixedly electrically connected to the back plate electrode, and there is a gap between the electro-deformable structure and the light-emitting unit. The longitudinal section of the gap is an inverted triangle, wherein a portion of the electro-deformable structure adjacent to the back plate is in contact with the light-emitting unit when the electro-deformable structure is not deformed. The longitudinal section of the gap is perpendicular to the surface of the back plate adjacent to the light-emitting unit and the surface of the back plate electrode facing the light-emitting unit.

4. The light-emitting device according to any one of claims 1-3, characterized in that: When the electro-deformable structure is fixedly connected to the light-emitting unit, the surface of the back plate electrode facing the light-emitting unit is provided with a plurality of first grooves, the first grooves being used to accommodate part of the electro-deformable structure when deformation occurs. When the electro-deformation structure is fixedly connected to the back plate electrode, the surface of the light-emitting unit facing the back plate electrode is provided with a plurality of second grooves, which are used to accommodate part of the electro-deformation structure when deformation occurs.

5. The light-emitting device according to claim 4, characterized in that: When the electro-deformation structure is fixedly connected to the back plate electrode, the surface of the light-emitting unit facing the back plate electrode is the light-emitting unit electrode, and the surface of the light-emitting unit electrode facing the back plate electrode has a plurality of second grooves; or, the surface of the light-emitting unit facing the back plate electrode has a protective layer, and the surface of the protective layer facing the back plate electrode has a plurality of second grooves.

6. The light-emitting device according to claim 5, characterized in that: When the surface of the light-emitting unit facing the back plate electrode has a protective layer, a conductive structure is provided on the surface of the protective layer and / or in the second groove, and the conductive structure is electrically connected to the electrode of the light-emitting unit. The conductive structure is used for electrical connection with the electrodeformation structure.

7. The light-emitting device according to claim 1, characterized in that: A shape memory layer is provided inside or on the surface of the electro-deformable structure, and the shape memory layer is used to maintain the deformation after the electro-deformable structure undergoes deformation.

8. The light-emitting device according to claim 1, characterized in that: The electrodeformation structure uses at least one of the following materials: polyethylene glycol, barium lead zirconate titanate, and potassium sodium silicate.

9. The light-emitting device according to claim 4, characterized in that: The longitudinal cross-section of the first groove is rectangular, trapezoidal, semi-elliptical, or circular. The longitudinal cross-section of the second groove is rectangular, trapezoidal, semi-elliptical, or circular. The longitudinal sections of the first groove and the second groove are perpendicular to the surface of the back plate adjacent to the light-emitting unit and the surface of the back plate electrode facing the light-emitting unit.

10. The light-emitting device according to claim 1, characterized in that: The light-emitting unit includes Micro LED or mini LED.

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