Light-emitting device, electronic device, control device, and light-emitting control method

Abstract

An embodiment of the present application provides a light-emitting device, an electronic device, a control device, and a light-emitting control method, which relate to the field of display technology and can improve the problem of low luminous efficiency of the light-emitting device. The light-emitting device includes a first electrode layer, an electroluminescent layer, and a nanoantenna layer arranged in sequence; wherein, the first electrode layer is used to enable the electroluminescent layer to generate photons; the nanoantenna layer is used to generate surface plasmon polaritons on the surface of the nanoantenna layer close to the electroluminescent layer when the photons generated by the electroluminescent layer exit to the surface of the nanoantenna layer.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a light-emitting device, an electronic device, a control device, and a light-emitting control method. Background Art

[0002] With the rapid development of display technologies, currently, light-emitting devices can be applied to display panels as self-emitting display panels for display. Compared with liquid crystal display panels, self-emitting display panels have been widely used because they do not require a backlight source.

[0003] As Figure 1 shown, taking an organic light-emitting diode (OLED) display panel as an example, the self-emitting display panel includes a substrate 10, a plurality of pixel driving circuits 20, a planarization layer 30, a plurality of light-emitting devices 40, and a pixel defining layer 50 disposed on the substrate 10. One pixel driving circuit 20 is electrically connected to one light-emitting device 40 (the connection relationship between the pixel driving circuit 20 and the light-emitting device 40 is not shown in the attached Figure 1 figure) and is used to drive the light-emitting device 40 to emit light. The pixel defining layer 50 includes a plurality of opening areas, and one light-emitting device 40 is disposed in one opening area. The self-emitting display panel further includes a packaging film 60 disposed on the light-emitting device 40. Among them, the light-emitting device 40 includes a relatively disposed first electrode layer 401 and a third electrode layer 406, and an electroluminescent layer 403 disposed between the first electrode layer 401 and the third electrode layer 406. When a voltage is applied to the first electrode layer 401 and the third electrode layer 406, under the action of the electric field generated between the first electrode layer 401 and the third electrode layer 406, the photons generated by the electroluminescent layer 403 are emitted through spontaneous emission, realizing light emission.

[0004] However, since only a small amount of the photons generated by the electroluminescent layer 403 are emitted through spontaneous emission, a large number of photons will remain in the electroluminescent layer 403 and be converted into heat and lost, resulting in a very low light-emitting efficiency of the light-emitting device 40. Summary of the Invention

[0005] Embodiments of this application provide a light-emitting device, an electronic device, a control device, and a light-emitting control method, which can improve the problem of low light-emitting efficiency of the light-emitting device.

[0006] To achieve the above object, this application adopts the following technical solutions:

[0007] First aspect, a light-emitting device is provided. The light-emitting device includes a first electrode layer, an electroluminescent layer, and a nanoantenna layer arranged in sequence; the first electrode layer is used to enable the electroluminescent layer to generate photons; the nanoantenna layer is used to generate surface plasmons on the surface of the nanoantenna layer close to the electroluminescent layer when the photons generated by the electroluminescent layer exit to the surface of the nanoantenna layer close to the electroluminescent layer. Compared with the prior art, the photons generated by the electroluminescent layer can only be emitted through spontaneous emission with a certain probability, and a large number of photons will remain in the electroluminescent layer and be converted into heat and lost, resulting in a very low luminous efficiency of the electroluminescent layer. In the embodiment of the present application, a nanoantenna layer is provided on one side of the electroluminescent layer. Since the nanoantenna layer is used to generate surface plasmons on the surface of the nanoantenna layer close to the electroluminescent layer when the photons generated by the electroluminescent layer exit to the surface of the nanoantenna layer close to the electroluminescent layer, and the surface plasmons will conduct along the nanoantenna layer and radiate outward on the surface of the nanoantenna layer, the photons that were originally difficult to radiate outward in the electroluminescent layer can be more easily radiated outward, thus greatly improving the luminous efficiency of the light-emitting device.

[0008] In a possible implementation manner, the nanoantenna layer includes a plurality of nanoantenna units arranged in sequence; two adjacent nanoantenna units are in contact; the plurality of nanoantenna units include tunable nanoantenna units; the light-emitting device further includes a second electrode layer provided on the side of the tunable nanoantenna unit away from the electroluminescent layer; the tunable nanoantenna unit is used to switch between an insulating state and a metallic state under the action of the electric fields generated by the first electrode layer and the second electrode layer. Since the tunable nanoantenna unit can switch between the metallic state and the insulating state, the length of the effective part in the nanoantenna layer can be adjusted by adjusting the switching of the tunable nanoantenna unit between the metallic state and the insulating state. And the band range of the surface plasmons radiated outward from the nanoantenna layer is related to the length of the effective part (i.e., the part that can enable the photons generated by the electroluminescent layer to radiate outward, that is, the part of the nanoantenna layer in the metallic state) in the nanoantenna layer. Therefore, the band range of the surface plasmons radiated outward from the nanoantenna layer can be adjusted by adjusting the length of the effective part in the nanoantenna layer. In this way, a light-emitting device can emit light of multiple colors.

[0009] In a possible implementation manner, the tunable nanoantenna unit is used to switch to the metallic state when the electric field intensity of the electric fields generated by the first electrode layer and the second electrode layer is greater than the electric field threshold; or, switch to the insulating state when the electric field intensity of the electric fields generated by the first electrode layer and the second electrode layer is less than or equal to the electric field threshold. By adjusting the electric field intensity of the electric fields generated by the first electrode layer and the second electrode layer, the switching of the tunable nanoantenna unit between the metallic state and the insulating state is adjusted.

[0010] In a possible implementation, the first electrode layer is used to enable the electroluminescent layer to generate photons, which includes: the first electrode layer is used to generate an electric field with the nanoantenna layer, so as to enable the electroluminescent layer to generate photons under the action of the electric field. By applying a voltage to the first electrode layer and the nanoantenna layer, the electroluminescent layer can generate photons under the action of the electric field generated by the first electrode layer and the nanoantenna layer.

[0011] In a possible implementation, the light-emitting device further includes a third electrode layer disposed on the side of the electroluminescent layer away from the first electrode layer; the first electrode layer is used to enable the electroluminescent layer to generate photons, which includes: the first electrode layer is used to generate an electric field with the third electrode layer, so as to enable the electroluminescent layer to generate photons under the action of the electric field. By applying a voltage to the first electrode layer and the third electrode layer, the electroluminescent layer can generate photons under the action of the electric field generated by the first electrode layer and the third electrode layer.

[0012] In a possible implementation, the plurality of nanoantenna units further includes non-tunable nanoantenna units; one side of the non-tunable nanoantenna unit is provided with tunable nanoantenna units along a first direction, and the other side of the non-tunable nanoantenna unit is provided with tunable nanoantenna units along a second direction; the non-tunable nanoantenna unit is in a metallic state; the first direction intersects with the second direction. At this time, when the non-tunable nanoantenna unit disposed along the first direction is in a metallic state and the non-tunable nanoantenna unit disposed along the second direction is in an insulating state, the light-emitting device can emit polarized light with a polarization direction parallel to the first direction; when the non-tunable nanoantenna unit disposed along the second direction is in a metallic state and the non-tunable nanoantenna unit disposed along the first direction is in an insulating state, the light-emitting device can emit polarized light with a polarization direction parallel to the second direction; when the non-tunable nanoantenna units disposed along the first direction and the second direction are both in a metallic state, the light emitted by the light-emitting device has no polarization state.

[0013] In a possible implementation, the first direction and the second direction are perpendicular to each other. This can avoid the mutual influence between the polarized light with a polarization direction of the first direction and the polarized light with a polarization direction of the second direction.

[0014] In a possible implementation, the light-emitting device further includes an insulating layer disposed between the tunable nanoantenna unit and the second electrode layer. This insulating layer can physically isolate the second electrode layer from the tunable nanoantenna unit, thereby avoiding the second electrode layer from affecting the radiation performance of the nanoantenna layer, and can also avoid generating an excessive electric field between the second electrode layer and the first electrode layer.

[0015] In a possible implementation, the material of the tunable nanoantenna unit includes at least one of vanadium dioxide and germanium antimony telluride compounds.

[0016] In a possible implementation, the light-emitting device further includes a third electrode layer disposed on a side of the electroluminescent layer away from the first electrode layer; the third electrode layer and the non-adjustable nanoantenna unit are respectively disposed on the electroluminescent layer. Since the light-emitting device includes the third electrode layer, the electroluminescent layer can be made to emit light by applying voltages to the first electrode layer and the third electrode layer.

[0017] In a possible implementation, the light-emitting device further includes a third electrode layer disposed on a side of the non-adjustable nanoantenna unit away from the electroluminescent layer, and the third electrode layer is in contact with the non-adjustable nanoantenna unit. Since the light-emitting device includes the third electrode layer, the electroluminescent layer can be made to emit light by applying voltages to the first electrode layer and the third electrode layer.

[0018] In a possible implementation, the third electrode layer and the non-adjustable nanoantenna unit are made of the same material. In this way, the third electrode layer and the non-adjustable nanoantenna unit can be fabricated simultaneously, thereby simplifying the manufacturing process of the light-emitting device.

[0019] In a possible implementation, the third electrode layer and the non-adjustable nanoantenna unit are respectively disposed on the electroluminescent layer, and the third electrode layer is in contact with the non-adjustable nanoantenna unit. When the third electrode layer is in contact with the non-adjustable nanoantenna unit, during the patterning process of the conductive thin film, there is no need to etch away the conductive thin film between the third electrode layer and the non-adjustable nanoantenna unit, thus further simplifying the manufacturing process of the light-emitting device.

[0020] In a possible implementation, along a direction perpendicular to the arrangement direction of the plurality of nanoantenna units, the third electrode layer is located on one side of the non-adjustable nanoantenna unit. In this way, it is possible to prevent the third electrode layer from affecting the length of the effective part in the nanoantenna layer, thereby affecting the wavelength range of the light radiated from the nanoantenna layer.

[0021] In a second aspect, an electronic device is provided. The electronic device includes a plurality of the above-described light-emitting devices. The electronic device has the same technical effects as those in the foregoing embodiments and will not be elaborated herein.

[0022] In a possible implementation, the plurality of first electrode layers in the light-emitting devices located in the same column are electrically connected together; the plurality of second electrode layers in the light-emitting devices located in the same row are electrically connected together. In this way, the first electrode layers in the same column can be energized simultaneously, and the second electrode layers electrically connected together in the same row can be energized simultaneously, which can not only simplify the manufacturing process of the electronic device but also simplify the control process of the first electrode layer and the second electrode layer.

[0023] In a possible implementation, multiple first electrode layers in the light-emitting devices located in the same column are electrically connected together, and multiple third electrode layers in the light-emitting devices located in the same row are electrically connected together. In this way, the first electrode layers in the same column can be powered on simultaneously, and the third electrode layers in the same row can be powered on simultaneously, which can not only simplify the manufacturing process of the electronic device but also simplify the control process of the first electrode layer and the third electrode layer.

[0024] In a possible implementation, multiple light-emitting devices include a first light-emitting device and a second light-emitting device; the wavelength range of the surface plasmons of the nanoantenna layer in the first light-emitting device is different from the wavelength range of the surface plasmons of the nanoantenna layer in the second light-emitting device. In this way, the first light-emitting device and the second light-emitting device can emit light of different colors, and the electronic device can achieve color display.

[0025] In a possible implementation, multiple light-emitting devices include a first light-emitting device and a second light-emitting device; the shape of the nanoantenna layer is strip-shaped; the length of the nanoantenna layer in the first light-emitting device is different from the length of the nanoantenna layer in the second light-emitting device. In this way, the first light-emitting device and the second light-emitting device can emit light of different colors, and the electronic device can achieve color display.

[0026] In a possible implementation, multiple light-emitting devices include a first light-emitting device and a second light-emitting device; the material of the nanoantenna layer in the first light-emitting device is different from the material of the nanoantenna layer in the second light-emitting device. In this way, the first light-emitting device and the second light-emitting device can emit light of different colors, and the electronic device can achieve color display.

[0027] In a possible implementation, the electronic device further includes a driving circuit; the driving circuit is used to apply a voltage to the first electrode layer in the light-emitting device.

[0028] In a possible implementation, the electronic device further includes a first processor; the first processor is used to control the driving circuit to apply a voltage to the first electrode layer in the light-emitting device.

[0029] In a third aspect, a control method for the above-mentioned light-emitting device is provided. The control method includes: applying a voltage to the first electrode layer in the light-emitting device.

[0030] In a possible implementation, the above control method further includes: applying a voltage to the second electrode layer to cause the tunable nanoantenna unit located between the first electrode layer and the second electrode layer to be converted from an insulating state to a metallic state under the action of the electric field generated by the first electrode layer and the second electrode layer. By controlling the conversion of the tunable nanoantenna unit between the insulating state and the metallic state, the length of the effective part in the nanoantenna layer can be adjusted, and further the band range of the light radiated from the nanoantenna layer can be adjusted.

[0031] In a possible implementation, the above control method further includes: applying a voltage to the third electrode layer to cause the electroluminescent layer located between the first electrode layer and the third electrode layer to generate photons under the action of the electric field generated by the first electrode layer and the third electrode layer. By controlling the voltage applied to the first electrode layer and the third electrode layer, the light emission of the electroluminescent layer can be controlled.

[0032] Fourthly, a control method for the above electronic device is provided. The control method includes: applying a voltage to the first electrode layer of the light-emitting device.

[0033] In a possible implementation, the electronic device includes a plurality of pixels, and each pixel includes a light-emitting device. The control method for the electronic device further includes: applying a voltage to the first group of second electrode layers during a first predetermined time period within the display period, and applying a voltage to the second group of second electrode layers during a second predetermined time period within the display period, so that the tunable nanoantenna unit located between the first electrode layer and the second electrode layer is converted from an insulating state to a metallic state under the action of the electric field generated by the first electrode layer and the second electrode layer; wherein, the number of the first group of second electrode layers is different from the number of the second group of second electrode layers. Since the color of the light emitted during the first predetermined time period can be adjusted by adjusting the number of the first group of second electrode layers, the color of the light emitted during the second predetermined time period can be adjusted by adjusting the number of the second group of second electrode layers, the intensity of the light emitted during the first predetermined time period can be controlled by controlling the duration of the first predetermined time period, and the intensity of the light emitted during the second predetermined time period can be controlled by controlling the duration of the second predetermined time period, and by controlling the color and intensity of the light emitted by the light-emitting device during the first predetermined time period and the second predetermined time period, the color of the light emitted by the light-emitting device within one display period can be controlled, so that the electronic device can achieve color display.

[0034] In a possible implementation, the control method for the electronic device further includes: applying a voltage to the second electrode layers of a plurality of light-emitting devices in the pixel, so that the tunable nanoantenna unit located between the first electrode layer and the second electrode layer is converted from an insulating state to a metallic state under the action of the electric field generated by the first electrode layer and the second electrode layer; wherein, the number of the second electrode layers to which the plurality of light-emitting devices in the pixel are applied with voltage is different. Since the number of the second electrode layers to which the plurality of light-emitting devices in the pixel are applied with voltage is different, the colors of the light emitted by the plurality of light-emitting devices in the pixel are different, so that the electronic device can achieve color display.

[0035] In a possible implementation manner, the control method further includes: applying a voltage to the third electrode layer of the light-emitting device, so that the electroluminescent layer located between the first electrode layer and the third electrode layer generates photons under the action of the electric field generated by the first electrode layer and the third electrode layer. By controlling the voltages applied to the first electrode layer and the third electrode layer, the light emission of the electroluminescent layer can be controlled.

[0036] In a fifth aspect, a control device is provided. The control device includes a second processor and a first memory; program codes are stored in the first memory, and when the program codes are executed by the second processor, the control method of the above-mentioned light-emitting device is implemented; or, the control method of the above-mentioned electronic device is implemented. The control device has the same technical effects as the foregoing embodiments and will not be elaborated herein. Description of the Drawings

[0037] Figure 1 A schematic structural diagram of an OLED display panel provided by the prior art;

[0038] Figure 2 A schematic hardware structure diagram of an electronic device provided by an embodiment of the present application;

[0039] Figure 3 A schematic structural diagram of an electronic device provided by an embodiment of the present application;

[0040] Figure 4 A schematic structural diagram of a display module of an electronic device provided by an embodiment of the present application;

[0041] Figure 5 A schematic structural diagram of a light-emitting device provided by an embodiment of the present application;

[0042] Figure 6a A schematic structural diagram of a light-emitting device provided by another embodiment of the present application;

[0043] Figure 6b A schematic structural diagram of a light-emitting device provided by still another embodiment of the present application;

[0044] Figure 6c A schematic structural diagram of a light-emitting device provided by yet another embodiment of the present application;

[0045] Figure 7a A schematic structural diagram of a light-emitting device provided by another embodiment of the present application;

[0046] Figure 7b A schematic structural diagram of a light-emitting device provided by still another embodiment of the present application;

[0047] Figure 8 A schematic structural diagram of a nanoantenna layer provided by an embodiment of the present application;

[0048] Figure 9 Schematic diagram of a structure of a light-emitting device provided for another embodiment of the present application;

[0049] Figure 10a Schematic diagram of a structure of a light-emitting device provided for another embodiment of the present application;

[0050] Figure 10b Schematic diagram of a structure of a light-emitting device provided for yet another embodiment of the present application;

[0051] Figure 11 Schematic diagram of a structure of a light-emitting device provided for another embodiment of the present application;

[0052] Figure 12a Schematic diagram of a structure of a light-emitting device provided for another embodiment of the present application;

[0053] Figure 12b Schematic diagram of a structure of a nano-antenna layer and a third electrode layer provided for an embodiment of the present application;

[0054] Figure 13 Schematic diagram of a structure of a display panel provided for an embodiment of the present application;

[0055] Figure 14 Schematic diagram of a structure of a display panel provided for another embodiment of the present application.

[0056] Reference numerals:

[0057] 01 - Electronic device; 10 - Substrate; 11 - First processor; 12 - Radio frequency circuit; 13 - Power supply; 14 - Second memory; 15 - Input unit; 16 - Display module; 17 - Audio circuit; 18 - Middle frame; 19 - Housing; 20 - Pixel driving circuit; 30 - Flat layer; 40 - Light-emitting device; 50 - Pixel defining layer; 60 - Encapsulation film; 100 - Display area; 101 - Non-display area; 151 - Touch screen; 152 - Other input devices; 160 - Display panel; 161 - Driving circuit; 171 - Speaker; 172 - Microphone; 401 - First electrode layer; 402 - Second electrode layer; 403 - Electroluminescent layer; 404 - Nano-antenna layer; 405 - Insulating layer; 406 - Third electrode layer; 4041 - Tunable nano-antenna unit; 4042 - Non-tunable nano-antenna unit. Detailed implementation manners

[0058] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0059] Hereinafter, the terms "first", "second", etc. are only for convenience of description and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0060] In addition, in the embodiments of the present application, "upper", "lower", "left", and "right" are not limited to being defined by the orientation of the components in the relative drawings. It should be understood that these directional terms can be relative concepts, which are used for relative description and clarification and can change accordingly with the change of the orientation of the components in the drawings.

[0061] In the present application, unless otherwise clearly specified and defined, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or integrated; it can be directly connected or indirectly connected through an intermediate medium. In addition, the term "electrical connection" can be a direct electrical connection or an indirect electrical connection through an intermediate medium.

[0062] The embodiments of the present application provide an electronic device with a display panel. The electronic device with a display panel can be a mobile phone, a tablet computer, a laptop computer, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), a wearable device (such as a smart watch), a virtual reality (VR) display device, an augmented reality (AR) display device, and a vehicle-mounted mobile electronic device, etc. The embodiments of the present application do not impose special restrictions on the specific forms of the above electronic devices.

[0063] Figure 2 It is a schematic diagram of the architecture of an exemplary electronic device provided by the embodiments of the present application. As Figure 2 shown, the electronic device 01 includes: a first processor 11, a radio frequency (RF) circuit 12, a power supply 13, a second memory 14, an input unit 15, a display module 16, an audio circuit 17, and other components. Those skilled in the art can understand that Figure 2 the structure of the electronic device shown in Figure 2 does not constitute a limitation on the electronic device 01. The electronic device 01 may include more or fewer components than those shown in Figure 2 shown, or may combine some of the components shown in Figure 2The component arrangements shown are different.

[0064] The first processor 11 is the control center of the electronic device 01, connecting various parts of the entire electronic device 01 through various interfaces and circuits. By running or executing software programs and / or modules stored in the second memory 14, and by calling data stored in the second memory 14, it performs various functions of the electronic device and processes data, thereby monitoring the electronic device as a whole. Optionally, the first processor 11 may include one or more processing units. For example, the first processor 11 may include an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a flight controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU), etc. Among them, different processing units may be independent devices or integrated in one or more processors. Preferably, the first processor 11 may integrate an application processor and a modem processor, where the application processor mainly processes the operating system, user interface, and application programs, etc., and the modem processor mainly processes wireless communication. It can be understood that the above-mentioned modem processor may not be integrated into the first processor 11 either.

[0065] The RF circuit 12 is used for receiving and transmitting information or signals during communication. Specifically, it receives the downlink information from the base station and processes it with the first processor 11. Additionally, it transmits the uplink data to the base station. Generally, the RF circuit 12 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier (LNA), a duplexer, etc. In addition, the RF circuit 12 can also communicate with the network and other devices via wireless communication. The wireless communication can use any communication standard or protocol, including but not limited to the global system of mobile communication (GSM), general packet radio service (GPRS), code division multiple access (CDMA), wideband code division multiple access (WCDMA), long term evolution (LTE), email, short messaging service (SMS), etc.

[0066] The power supply 13 (such as a battery) is used to supply power to each component in the electronic device 01. Optionally, the power supply 13 can be logically connected to the first processor 11 through a power management system, so as to realize functions such as management of charging, discharging, and power consumption management through the power management system.

[0067] The second memory 14 is used to store software programs and modules. The first processor 11 executes various functional applications and data processing of the electronic device by running the software programs and modules stored in the second memory 14. The second memory 14 mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system, application programs required for at least one function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created according to the use of the mobile phone (such as audio data, image data, phone book, etc.). In addition, the second memory 14 can include high-speed random access memory, and can also include non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0068] The input unit 15 is used to receive the input digital or character information, and generate key signal inputs related to the user settings and function controls of the electronic device. Specifically, the input unit 15 may include a touch screen 151 and other input devices 152. The touch screen 151, also known as a touch panel, can collect the touch operations of the user on or near the touch screen (such as the operations of the user using a finger, a stylus, or any suitable object or accessory on or near the touch screen 151), and drive the corresponding connection device according to a preset program. Optionally, the touch screen 151 may include two parts: a touch detection device and a touch controller. Among them, the touch detection device detects the touch position of the user and detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and then sends it to the first processor 11, and can receive and execute the commands sent by the first processor 11. In addition, the touch screen 151 can be implemented in multiple types such as resistive, capacitive, infrared, and surface acoustic wave. The other input devices 152 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, power switch keys, etc.), a trackball, a mouse, a joystick, etc.

[0069] The display module 16 is used to display the information input by the user or the information provided to the user, as well as various menus of the electronic device. The display module 16 includes a display panel 160. In this application, an OLED display panel can be used to configure the display panel 160. Further, the touch screen 151 can cover the display panel 160. When the touch screen 151 detects a touch operation on or near the touch screen 151, it is transmitted to the first processor 11 to determine the type of the touch event. Subsequently, the first processor 11 provides a corresponding visual output on the display panel 160 according to the type of the touch event. Although in Figure 2 the touch screen 151 and the display panel 160 are implemented as two independent components to realize the input and output functions of the electronic device, in some embodiments, the touch screen 151 and the display panel 160 can be integrated to realize the input and output functions of the electronic device.

[0070] The audio circuit 17, the speaker 171, and the microphone 172 are used to provide an audio interface between the user and the electronic device. The audio circuit 17 can transmit the electrical signal converted from the received audio data to the speaker 171, and the speaker 171 converts it into a sound signal for output; on the other hand, the microphone 172 converts the collected sound signal into an electrical signal, which is received by the audio circuit 17 and then converted into audio data, and then the audio data is output to the RF circuit 12 to be sent to another electronic device, for example, or the audio data is output to the second memory 14 for further processing.

[0071] Optionally, as Figure 2The electronic device shown may also include various sensors. For example, a gyroscope sensor, a hygrometer sensor, an infrared sensor, a magnetometer sensor, etc., which will not be elaborated here. Optionally, as Figure 2 the electronic device shown may also include a wireless fidelity (WiFi) module, a Bluetooth module, etc., which will not be elaborated here.

[0072] It can be understood that in the embodiments of the present application, the electronic device (such as the Figure 2 electronic device shown) can execute some or all of the steps in the embodiments of the present application. These steps or operations are only examples, and the embodiments of the present application can also execute other operations or various deformations of the operations. In addition, each step can be executed in a different order presented in the embodiments of the present application, and it is possible not to execute all the operations in the embodiments of the present application. The embodiments of the present application can be implemented separately or in any combination, and the present application does not limit this.

[0073] For the convenience of description below, the electronic device 01 is taken as an example of a mobile phone. The above-mentioned electronic device 01, as Figure 3 shown, may also include a middle frame 18 and a housing 19. The display module 16 and the housing 19 are respectively located on both sides of the middle frame 18, and the display module 16 and the middle frame 18 are disposed within the housing 19. The above-mentioned power supply 13 can be disposed on the middle frame 18.

[0074] As Figure 4 shown, the above-mentioned display module 16 includes a display panel 160. The display panel 160 includes an active area (AA) 100 and a non-display area 101 located around the AA area 100. The AA area 100 includes a plurality of sub-pixels arranged in a matrix form. The AA area is also called a sub-pixel area, and each sub-pixel includes a light-emitting device 40.

[0075] As Figure 4 shown, the display module 16 further includes a driving circuit 161 disposed in the non-display area 101 of the display panel 160. The driving circuit 161 can be, for example, a display driver integrated circuit (DDIC). In this case, the light-emitting devices 40 in the same column of sub-pixels are coupled to the DDIC through the same signal line.

[0076] As Figure 3 and Figure 4As shown, the above-mentioned electronic device 01 further includes a printed circuit board (PCB) (or a drive system board), and an application processor (such as a CPU) and a power management chip (power IC) mounted on the PCB. As Figure 3 shown, the printed circuit board can be arranged on the above-mentioned middle frame 18. Figure 4 The DDIC in is coupled to the AP through a flexible printed circuit (FPC).

[0077] In this way, the AP provides display data for the DDIC and the display panel 160 to display actual image information; the power IC provides operating voltage for the DDIC and the display panel 160. The FPC provides a signal transmission connection path between the PCB and the display module 16. The FPC is connected to the PCB through a connector, and the other end of the FPC is bonded to the display module 16 through an anisotropic conductive film. The DDIC is used to receive the signal transmitted by the PCB and control the signal to be delivered to the display panel 160 according to a specific timing. For example, after the display data output by the AP passes through the DDIC, it is converted into a data voltage Vdata and transmitted to the light-emitting devices 40 coupled to each signal line to drive the light-emitting devices 40 to emit light.

[0078] An embodiment of the present application provides an electronic device, which may be the above-mentioned display panel 160, display module 16 or electronic device 01.

[0079] An embodiment of the present application further provides a light-emitting device 40, which can be applied to the above-mentioned display panel 160. As Figure 5 shown, the light-emitting device 40 includes: a first electrode layer 401, an electroluminescent layer 403 and a nanoantenna layer 404 arranged in sequence; wherein, the first electrode layer 401 is used to enable the electroluminescent layer 403 to generate photons; the nanoantenna layer 404 is used to generate surface plasmons (SP) on the surface close to the electroluminescent layer 403 when the photons generated by the electroluminescent layer 403 exit to the surface of the nanoantenna layer 404.

[0080] It should be noted that surface plasmons are electromagnetic oscillations formed by the interaction of free electrons and photons in the metal surface region. When light waves (electromagnetic waves) are incident on the metal-dielectric interface, the free electrons on the metal surface undergo collective oscillations, and a near-field electromagnetic wave that propagates along the metal surface is formed by the coupling of the electromagnetic wave and the free electrons on the metal surface. If the oscillation frequency of the electrons is consistent with the frequency of the incident light wave, resonance will occur. In the resonance state, the energy of the electromagnetic field is effectively converted into the collective vibration energy of the free electrons on the metal surface. At this time, a special electromagnetic mode is formed: the electromagnetic field is confined within a very small range on the metal surface and is enhanced. This phenomenon is called the surface plasmon phenomenon.

[0081] It should be understood that the first electrode layer 401 and the electroluminescent layer 403 may be in direct contact, or other film layers may be provided therebetween. The electroluminescent layer 403 and the nanoantenna layer 404 may be in direct contact, or other film layers may be provided therebetween.

[0082] In some embodiments, as Figure 5 shown, the light-emitting device 40 may be disposed on the substrate 10.

[0083] Here, when the electroluminescent layer 403 is an organic electroluminescent layer or a quantum dot electroluminescent layer, in some embodiments, the light-emitting device 40 may further include one or more layers such as an electron transporting layer (ETL), an electron injection layer (EIL), a hole transporting layer (HTL), and a hole injection layer (HIL). Among them, the electron transporting layer, the electron injection layer, the hole transporting layer, the hole injection layer, etc. can all be stacked with the electroluminescent layer 403. When the first electrode layer 401 is used as the anode, the hole injection layer and the hole transporting layer are located between the first electrode layer 401 and the electroluminescent layer 403, and the electron transporting layer and the electron injection layer are located between the electroluminescent layer 403 and the nanoantenna layer 404. When the first electrode layer 401 is used as the cathode, the electron transporting layer and the electron injection layer are located between the first electrode layer 401 and the electroluminescent layer 403, and the hole injection layer and the hole transporting layer are located between the electroluminescent layer 403 and the nanoantenna layer 404. When the electroluminescent layer 403 is an organic electroluminescent layer, the light-emitting device 40 can also be called an OLED at this time. When the electroluminescent layer 403 is a quantum dot electroluminescent layer, the light-emitting device 40 can also be called a quantum dot light emitting diode (QLED) at this time.

[0084] When the electroluminescent layer 403 is an inorganic electroluminescent layer, in some embodiments, the light-emitting device 40 may further include a P-type semiconductor layer and an N-type semiconductor layer located on both sides of the electroluminescent layer 403. When the electroluminescent layer 403 is an inorganic electroluminescent layer, the light-emitting device 40 may also be referred to as a micro light emitting diode (micro-LED) at this time.

[0085] It should be understood that the first electrode layer 401 is used to enable the electroluminescent layer 403 to generate photons. In some embodiments, the above-mentioned nanoantenna layer 404 can be multiplexed as an electrode. The first electrode layer 401 is used to enable the electroluminescent layer 403 to generate photons, including: the first electrode layer 401 is used to generate an electric field with the nanoantenna layer 404, so as to enable the electroluminescent layer 403 to generate photons under the action of the electric field. By applying a voltage to the first electrode layer 401 and the nanoantenna layer 404, an electric field will be generated between the first electrode layer 401 and the nanoantenna layer 404. In other embodiments, the light-emitting device 40 further includes a third electrode layer disposed on the side of the electroluminescent layer 403 away from the first electrode layer 401. The first electrode layer 401 is used to enable the electroluminescent layer 403 to generate photons, including: the first electrode layer 401 is used to generate an electric field with the third electrode layer, so as to enable the electroluminescent layer 403 to generate photons under the action of the electric field. By applying a voltage to the first electrode layer 401 and the third electrode layer, an electric field can be generated between the first electrode layer 401 and the third electrode layer. Here, a voltage can be applied to the first electrode layer 401, the nanoantenna layer 404, and the third electrode layer in the light-emitting device 40 through the driving circuit 161.

[0086] An embodiment of the present application provides a light-emitting device 40, including a first electrode layer 401, an electroluminescent layer 403, and a nanoantenna layer 404 arranged in sequence, and the first electrode layer 401 is used to enable the electroluminescent layer 403 to generate photons. Compared with the prior art, the photons generated by the electroluminescent layer 403 can only be emitted through spontaneous emission with a certain probability, and a large number of photons will remain in the electroluminescent layer 403 and be converted into heat and lost, resulting in a very low luminous efficiency of the electroluminescent layer 403. In the embodiment of the present application, a nanoantenna layer 404 is provided on one side of the electroluminescent layer 403. Since the nanoantenna layer 404 is used to generate surface plasmons on the surface of the nanoantenna layer 404 close to the electroluminescent layer 403 when the photons generated by the electroluminescent layer 403 exit to the surface of the nanoantenna layer 404 close to the electroluminescent layer 403, and the surface plasmons will conduct along the nanoantenna layer 404 and radiate outward on the surface of the nanoantenna layer 404, it can make the photons that are originally difficult to radiate outward in the electroluminescent layer 403 radiate outward more easily, thereby greatly improving the luminous efficiency of the light-emitting device 40.

[0087] It should be noted that the luminous efficiency of the light-emitting device 40 includes the external quantum efficiency and the internal quantum efficiency. The internal quantum efficiency refers to the efficiency of converting electricity into light. The external quantum efficiency refers to the product of the efficiency of converting electricity into light and the efficiency of light radiation. Based on the above, the external quantum efficiency of the light-emitting device 40 is improved in the embodiments of the present application.

[0088] In some embodiments, such as Figure 6a and Figure 6b shown, the nanoantenna layer 404 includes a plurality of nanoantenna units arranged in sequence; two adjacent nanoantenna units are in contact; the plurality of nanoantenna units includes an adjustable nanoantenna unit 4041; the light-emitting device 40 further includes a second electrode layer 402 disposed on a side of the adjustable nanoantenna unit 4041 away from the electroluminescent layer 403; a positive projection of the second electrode layer 402 on the substrate 10 and a positive projection of the adjustable nanoantenna unit 4041 on the substrate 10 have an overlapping area; wherein, the adjustable nanoantenna unit 4041 is configured to convert between an insulating state (which can also be referred to as a dielectric state) and a metallic state under the action of an electric field generated by the first electrode layer 401 and the second electrode layer 402.

[0089] The above-mentioned plurality of nanoantenna units may include one adjustable nanoantenna unit 4041, or may include two or more adjustable nanoantenna units 4041.

[0090] Here, in some examples, such as Figure 6a shown, all the nanoantenna units included in the nanoantenna layer 404 are adjustable nanoantenna units 4041. Attached Figure 6a Taking the nanoantenna layer 404 including two adjustable nanoantenna units 4041 as an example for illustration. In some other examples, such as Figure 6b shown, the nanoantenna layer 404 includes an adjustable nanoantenna unit 4041 and a non-adjustable nanoantenna unit 4042, wherein the non-adjustable nanoantenna unit 4042 is in a metallic state. Attached Figure 6b Taking the nanoantenna layer 404 including one adjustable nanoantenna unit 4041 and one non-adjustable nanoantenna unit 4042 as an example for illustration. In the case where the nanoantenna layer 404 includes a plurality of adjustable nanoantenna units 4041, the lengths L of the plurality of adjustable nanoantenna units 4041 may be the same or different.

[0091] It should be noted that the nanoantenna layer 404 includes three-dimensional dimensions, and the largest dimension among the three-dimensional dimensions is considered as the length of the nanoantenna layer 404. Similarly, the largest dimension among the three-dimensional dimensions of the adjustable nanoantenna unit 4041 is considered as the length L of the adjustable nanoantenna unit 4041, and the largest dimension among the three-dimensional dimensions of the non-adjustable nanoantenna unit 4042 is considered as the length of the non-adjustable nanoantenna unit 4042.

[0092] It should be understood that when photons generated from the electroluminescent layer 403 exit to the surface of the nanoantenna layer 404 close to the electroluminescent layer 403, only the part in the metallic state in the nanoantenna layer 404 can generate surface plasmons and radiate outward along the part in the metallic state in the nanoantenna layer 404. Therefore, the effective part in the nanoantenna layer 404, that is, the part that can make the photons generated by the electroluminescent layer 403 radiate outward is the part in the metallic state in the nanoantenna layer 404. Based on this, the length of the effective part in the nanoantenna layer 404 can be controlled by adjusting whether the tunable nanoantenna unit 4041 is in the metallic state or the insulating state.

[0093] In some embodiments, the tunable nanoantenna unit 4041 is configured to convert to the metallic state when the electric field strength generated by the first electrode layer 401 and the second electrode layer 402 is greater than the electric field threshold; or, convert to the insulating state when the electric field strength generated by the first electrode layer 401 and the second electrode layer 402 is less than or equal to the electric field threshold.

[0094] Here, the electric field threshold can be set according to the material of the tunable nanoantenna unit 4041. In some examples, the electric field threshold is 0. In this case, the tunable nanoantenna unit 4041 is configured to convert to the metallic state when a voltage is applied to the first electrode layer 401 and the second electrode layer 402; and convert to the insulating state when no voltage is applied to the first electrode layer 401 and the second electrode layer 402. That is, when the first electrode layer 401 and the second electrode layer 402 are powered on, the tunable nanoantenna unit 4041 is in the metallic state, and when the first electrode layer 401 and the second electrode layer 402 are powered off, the tunable nanoantenna unit 4041 is in the insulating state.

[0095] Taking the light-emitting device 40 as the structure as shown in Figure 6b and Figure 6c as an example, as shown in Figure 6b when a voltage is applied to the first electrode layer 401 and the second electrode layer 402, and the electric field strength generated by the first electrode layer 401 and the second electrode layer 402 is greater than the electric field threshold, under the action of the electric field generated by the first electrode layer 401 and the second electrode layer 402, the tunable nanoantenna unit 4041 converts to the metallic state, and the tunable nanoantenna unit 4041 is connected to the non-tunable nanoantenna unit 4042 (the non-tunable nanoantenna unit 4042 is in the metallic state) on its left. At this time, the length of the effective part of the nanoantenna layer 404 is the sum of the length of the non-tunable nanoantenna unit 4042 and the length of the tunable nanoantenna unit 4041. As shown in Figure 6cAs shown, when the electric field strength of the electric field generated between the first electrode layer 401 and the second electrode layer 402 is less than or equal to the electric field threshold, for example, when no voltage is applied, that is, when the power is off, the adjustable nano-antenna unit 4041 is converted to an insulating state. At this time, the length of the effective part of the nano-antenna layer 404 is the length of the unadjusted nano-antenna unit 4042. Based on the above, it can be known that by controlling the electric field strength of the electric field generated between the first electrode layer 401 and the second electrode layer 402, the adjustable nano-antenna unit 4041 can be controlled to convert between the insulating state and the metallic state, and then the length of the effective part of the nano-antenna layer 404, that is, the length of the part of the nano-antenna layer 404 that can cause the photons generated by the electroluminescent layer 403 to radiate outwards, can be controlled.

[0096] The material of the above-mentioned adjustable nano-antenna unit 4041 is a phase change material. A phase change material is a material that can be converted between a metallic state and an insulating state, and the change of the material state is triggered by temperature change, electric field excitation, light excitation, etc. The phase change material in the embodiment of the present application can be converted from an insulating state to a metallic state under the electric field excitation generated by the first electrode layer 401 and the second electrode layer 402. Since the adjustable nano-antenna unit 4041 is nano-sized, the speed of the material state conversion of the adjustable nano-antenna unit 4041 can be quite fast, sufficient to meet the response rate requirements of electronic products.

[0097] For example, the material of the adjustable nano-antenna unit 4041 includes at least one of vanadium dioxide (VO2) and germanium antimony tellurium (GeSbTe) compounds.

[0098] For example, the material of the non-adjustable nano-antenna unit 4042 includes metal or other conductive materials. The metal may be, for example, silver (Ag), aluminum (Al), copper (Cu), platinum (Pt) or one or more of their alloys.

[0099] It should be noted that the photons enhanced and radiated by the nanoantenna layer 404 depend on the resonant band of the nanoantenna layer 404. Only the light radiation in the resonant band is enhanced, and the light radiation in the remaining parts is very weak. Therefore, the resonant band of the nanoantenna layer 404 can be designed to radiate light of a specific band from the nanoantenna layer 404, that is, light of a specific color is emitted from the nanoantenna layer 404. The resonant band of the nanoantenna layer 404 is related to the length of the part in the nanoantenna layer 404 that can radiate the photons generated by the electroluminescent layer 403 outward. Therefore, there is a proportional relationship between the length of the part in the nanoantenna layer 404 that can radiate the photons generated by the electroluminescent layer 403 outward and the light band it acts on. That is, the band range of the surface plasmon radiated from the nanoantenna layer 404 is related to the length of the part in the nanoantenna layer 404 that can radiate the photons generated by the electroluminescent layer 403 outward. When the length of the part in the nanoantenna layer 404 that can radiate the photons generated by the electroluminescent layer 403 outward changes, the band range of the surface plasmon radiated from the nanoantenna layer 404 will also change accordingly. The nanoantenna layer 404 in the embodiment of the present application is similar to the antenna in wireless communication, but the difference is that the nanoantenna layer 404 in the embodiment of the present application has a surface plasmon effect in the light band corresponding to its effective length. In addition, for light of the same color, since the surface plasmon wavelength is usually only 1 / 6 - 1 / 2 of the wavelength in air, only a relatively short nanoantenna layer 404 is needed to resonate with light of a specific wavelength. For example, if blue light with a band around 400 nm is to be radiated from the nanoantenna layer 404, the length of the effective part in the nanoantenna layer 404 may be 100 nm, or less than 100 nm. When the light-emitting device 40 is applied to a display panel, since the visible light band during display is in the range of 380 nm - 750 nm, when visible light with a band in the range of 380 nm - 750 nm is to be radiated from the nanoantenna layer 404, the length of the effective part in the nanoantenna layer 404 is usually in the range of 20 nm - 200 nm. It can be understood that when the material of the nanoantenna layer 404 changes, the length range of the effective part in the nanoantenna layer 404 may also change.

[0100] Based on the above, if the spectral width of the light emitted by the electroluminescent layer 403 is relatively wide, the length of the effective part in the nanoantenna layer 404 can be adjusted to emit light of a corresponding band (light of a corresponding color).

[0101] When the nanoantenna layer 404 in the light-emitting device 40 includes a plurality of tunable nanoantenna units 4041, light of multiple colors can be emitted from the light-emitting device 40 through specific design.

[0102] For example, as Figure 7aAs shown, the nanoantenna layer 404 includes three nanoantenna units arranged in sequence. One of them is a non-tunable nanoantenna unit 4042, and the other two are tunable nanoantenna units 4041a and 4041b. The two tunable nanoantenna units 4041a and 4041b are located on the same side of the non-tunable nanoantenna unit 4042. The non-tunable nanoantenna unit 4042 determines the shortest wavelength of the light emitted by the light-emitting device 40, for example, 400 nm. When the first tunable nanoantenna unit 4041a on the left is converted into a metallic state under the action of an electric field, the length of the effective part in the nanoantenna layer 404 is the sum of the length of the non-tunable nanoantenna unit 4042 and the length of the first tunable nanoantenna unit 4041a. At this time, the wavelength of the light emitted by the light-emitting device 40 is 500 nm. When both tunable nanoantenna units 4041a and 4041b are converted into metallic states under the action of an electric field, the length of the effective part in the nanoantenna layer 404 is the sum of the length of the non-tunable nanoantenna unit 4042 and the lengths of the two tunable nanoantenna units 4041a and 4041b. At this time, the wavelength of the light emitted by the light-emitting device 40 is 600 nm.

[0103] For another example, as Figure 7bAs shown, the nano - antenna layer 404 includes three nano - antenna units arranged in sequence. One is a non - tunable nano - antenna unit 4042, and the other two are tunable nano - antenna units 4041a and 4041b. The two tunable nano - antenna units 4041a and 4041b are located on both sides of the non - tunable nano - antenna unit 4042 respectively. When no electric field is applied to the two tunable nano - antenna units 4041a and 4041b on the left and right, the length of the effective part in the nano - antenna layer 404 is the length of the non - tunable nano - antenna unit 4042. At this time, the wavelength of the light emitted by the light - emitting device 40 is 400 nm. When only the left - hand tunable nano - antenna unit 4041a is converted to the metallic state under the action of an electric field, the length of the effective part in the nano - antenna layer 404 is the sum of the length of the non - tunable nano - antenna unit 4042 and the length of the left - hand tunable nano - antenna unit 4041a. At this time, the wavelength of the light emitted by the light - emitting device 40 is 500 nm. When only the right - hand tunable nano - antenna unit 4041b is converted to the metallic state under the action of an electric field, the length of the effective part in the nano - antenna layer 404 is the sum of the length of the non - tunable nano - antenna unit 4042 and the length of the right - hand tunable nano - antenna unit 4041b. At this time, the wavelength of the light emitted by the light - emitting device 40 is 600 nm. When both the left - hand tunable nano - antenna unit 4041a and the right - hand tunable nano - antenna unit 4041b are converted to the metallic state under the action of an electric field, the length of the effective part in the nano - antenna layer 404 is the sum of the length of the non - tunable nano - antenna unit 4042 and the lengths of the left - hand tunable nano - antenna unit 4041a and the right - hand tunable nano - antenna unit 4041b. At this time, the wavelength of the light emitted by the light - emitting device 40 is 700 nm. Based on this, it can be seen that the light - emitting device 40 can emit light of four colors.

[0104] Based on the above, the nano - antenna layer 404 can also include a larger number of tunable nano - antenna units 4041, so as to support the light - emitting device 40 to emit more kinds of colored light.

[0105] In the embodiments of the present application, the nano - antenna layer 404 includes a plurality of nano - antenna units arranged in sequence. The plurality of nano - antenna units include tunable nano - antenna units 4041, and the tunable nano - antenna units 4041 are used to switch between an insulating state and a metallic state under the action of the electric field generated by the first electrode layer 401 and the second electrode layer 402. Since the tunable nano - antenna units 4041 can switch between the metallic state and the insulating state, the length of the effective part in the nano - antenna layer 404 can be adjusted by adjusting the switching of the tunable nano - antenna units 4041 between the metallic state and the insulating state. The band range of the surface plasmon radiated from the nano - antenna layer 404 is related to the length of the effective part in the nano - antenna layer 404. Therefore, the band range of the surface plasmon radiated from the nano - antenna layer 404 can be adjusted by adjusting the length of the effective part in the nano - antenna layer 404. In this way, a light - emitting device 40 can emit light of multiple colors.

[0106] In some embodiments, as Figure 8 shown, the above - mentioned plurality of nano - antenna units further include non - tunable nano - antenna units 4042; on one side of the non - tunable nano - antenna unit 4042, tunable nano - antenna units 4041 are arranged along a first direction, and on the other side of the non - tunable nano - antenna unit 4042, tunable nano - antenna units 4041 are arranged along a second direction; wherein, the non - tunable nano - antenna unit 4042 is in a metallic state; the first direction and the second direction intersect, that is, the first direction and the second direction are not parallel.

[0107] Here, the number of tunable nano - antenna units 4041 arranged along the first direction on one side of the non - tunable nano - antenna unit 4042 and the number of tunable nano - antenna units 4041 arranged along the second direction on the other side of the non - tunable nano - antenna unit 4042 can be one or multiple.

[0108] It should be noted that for the effective part in the nano - antenna layer 404, the dimensions in three dimensions are different, and when the dimension in one of the dimensions is relatively large, the maximum dimension among the three - dimensional dimensions of the effective part in the nano - antenna layer 404 is regarded as the length of the effective part in the nano - antenna layer 404. The direction of the length of the effective part in the nano - antenna layer 404 is called the polarization direction (or polarization direction) of the nano - antenna layer 404. For the nano - antenna layer 404 with a polarization direction, the nano - antenna layer 404 has polarization - light selectivity. Since the effective part in the nano - antenna layer 404 has a strong enhancing effect on the radiation of light with a polarization direction the same as the polarization direction of the nano - antenna layer 404, the light radiated from the nano - antenna layer 404 is polarized light, and the polarization direction of the polarized light is the same as the polarization direction of the nano - antenna layer 404, that is, the radiation of polarized light can be realized through the nano - antenna layer 404.

[0109] It should be understood that in addition to color (i.e., wavelength), the properties of light also include polarization characteristics. Refer to Figure 8 , when the tunable nanoantenna unit 4041a arranged on one side of the non-tunable nanoantenna unit 4042 along the first direction is converted into a metallic state under the action of an electric field, and the tunable nanoantenna unit 4041b arranged on the other side of the non-tunable nanoantenna unit 4042 along the second direction is in an insulating state, at this time, the polarization direction of the effective part in the nanoantenna layer 404 is parallel to the first direction, that is, Figure 8 the lower left and upper right directions shown by the double arrow A in Figure 8 . The light emitted by the electroluminescent layer 403 exits from the non-tunable nanoantenna unit 4042 and the tunable nanoantenna unit 4041a. At this time, the emitted polarized light oscillates in the direction parallel to the first direction (i.e.,

[0110] the lower left and upper right directions shown by the double arrow A in Figure 8 ). That is to say, the polarization direction of the emitted light is parallel to the first direction. In this case, the wavelength of the emitted polarized light is related to the length of the non-tunable nanoantenna unit 4042 along the first direction and the length of the tunable nanoantenna unit 4041a in the metallic state. Figure 8 When the tunable nanoantenna unit 4041b arranged on the other side of the non-tunable nanoantenna unit 4042 along the second direction is converted into a metallic state under the action of an electric field, and the tunable nanoantenna unit 4041a arranged on one side of the non-tunable nanoantenna unit 4042 along the first direction is in an insulating state, at this time, the polarization direction of the effective part in the nanoantenna layer 404 is parallel to the second direction, that is,

[0111] In the embodiments of the present application, since the above-mentioned multiple nanoantenna units include non-tunable nanoantenna units 4042; on one side of the non-tunable nanoantenna unit 4042, tunable nanoantenna units 4041 are arranged along a first direction, and on the other side of the non-tunable nanoantenna unit 4042, tunable nanoantenna units 4041 are arranged along a second direction, and the first direction and the second direction intersect. Therefore, when the non-tunable nanoantenna unit 4042 arranged along the first direction is in a metallic state and the non-tunable nanoantenna unit 4042 arranged along the second direction is in an insulating state, the light-emitting device 40 can emit polarized light with a polarization direction parallel to the first direction; when the non-tunable nanoantenna unit 4042 arranged along the second direction is in a metallic state and the non-tunable nanoantenna unit 4042 arranged along the first direction is in an insulating state, the light-emitting device 40 can emit polarized light with a polarization direction parallel to the second direction; when the non-tunable nanoantenna units 4042 arranged along the first direction and the second direction are both in a metallic state, the light emitted by the light-emitting device 40 has no polarization state.

[0112] Based on the above, since the light-emitting device 40 can emit polarized light with a polarization direction parallel to the first direction and polarized light with a polarization direction parallel to the second direction at different times, the light-emitting device 40 can be applied to the display panel 160 to achieve 3D (3 dimensions) display. Specifically, by wearing glasses with polarization selectivity or setting components with adjustable light-emitting directions, the polarized light with a polarization direction parallel to the first direction can be made to irradiate the left eye of the viewer, and the polarized light with a polarization direction parallel to the second direction can be made to irradiate the right eye of the viewer to achieve 3D display. Or, the light-emitting device 40 is applied to the display panel 160 to achieve the display panel 160 displaying two different images. Specifically, the polarized light with a polarization direction of the first direction is used to form the first image, and the polarized light with a polarization direction of the second direction is used to form the second image. By setting components with adjustable light-emitting directions, the polarized light with a polarization direction of the first direction is made to irradiate to the left, and the polarized light with a polarization direction of the second direction is made to irradiate to the right, so that the viewer on the left can view the first image and the viewer on the right can view the second image. When the light-emitting device 40 can emit polarized light in two polarization directions at different times, the light-emitting device 40 can be applied to the above two situations but is not limited thereto.

[0113] In order to avoid the mutual influence between the polarized light with a polarization direction of the first direction and the polarized light with a polarization direction of the second direction, in some embodiments, the first direction and the second direction are perpendicular to each other.

[0114] Since the first direction and the second direction are perpendicular to each other, two kinds of polarized light with orthogonal polarization directions can be emitted from the nano - antenna layer 404. Generally, light with various polarization directions can be constructed by two orthogonally polarized lights. Specifically, within the time limit of the persistence of vision, a light - emitting period T can be determined. The light - emitting period T is divided into two light - emitting times T1 and T2. During the light - emitting time T1, by applying an electric field, the tunable nano - antenna unit 4041 arranged on one side of the non - tunable nano - antenna unit 4042 along the first direction is in the metallic state, and all the tunable nano - antenna units 4041 arranged on one side of the non - tunable nano - antenna unit 4042 along the second direction are in the insulating state. At this time, only the polarized light with the polarization direction parallel to the first direction is emitted. During the light - emitting time T2, by applying an electric field, the tunable nano - antenna unit 4041 arranged on one side of the non - tunable nano - antenna unit 4042 along the second direction is in the metallic state, and all the tunable nano - antenna units 4041 arranged on one side of the non - tunable nano - antenna unit 4042 along the first direction are in the insulating state. At this time, only the polarized light with the polarization direction parallel to the second direction is emitted. If T1 or T2 is 0, the light emitted by the display panel 160 seen by the viewer is polarized light, and the polarization direction is parallel to the first direction or the second direction. If T1 = T2, the light emitted by the display panel 160 seen by the viewer is non - polarized light. If T1 ≠ T2 and both T1 and T2 are non - zero, the light emitted by the display panel 160 seen by the viewer is polarized light, and the polarization direction is related to the magnitudes of T1 and T2.

[0115] In some embodiments, as Figure 9 shown, the light - emitting device 40 further includes an insulating layer 405 disposed between the tunable nano - antenna unit 4041 and the second electrode layer 402.

[0116] Exemplarily, the material of the insulating layer 405 can be at least one of silicon nitride (SiNx), silicon oxide (SiOx), or silicon oxynitride (SiOxNy).

[0117] Here, the insulating layer 405 can also be disposed above the non - tunable nano - antenna unit 4042.

[0118] Since the light - emitting device 40 further includes an insulating layer 405 disposed between the tunable nano - antenna unit 4041 and the second electrode layer 402, this insulating layer 405 can physically isolate the second electrode layer 402 from the tunable nano - antenna unit 4041, thereby preventing the second electrode layer 402 from affecting the radiation performance of the nano - antenna layer 404 and also preventing an excessive electric field from being generated between the second electrode layer 402 and the first electrode layer 401.

[0119] It should be noted that when the light-emitting device 40 is applied to a display panel, the light-emitting device 40 is a microscopic structure. Therefore, even if the voltage difference between the first electrode layer 401 and the second electrode layer 402 is relatively small, for example, about 0.5V, due to the very short distance between the first electrode layer 401 and the second electrode layer 402, for example, 0.5μm, the electric field formed by the first electrode layer 401 and the second electrode layer 402 will be very large, up to 10 6 V / m. Usually, the operating environment of the light-emitting device 40 does not have such a high electric field. Therefore, accidental external electric field interference has no effect on the light emission of the light-emitting device 40.

[0120] In some embodiments, as Figure 10a and Figure 10b shown, the light-emitting device 40 further includes a third electrode layer 406 disposed on a side of the electroluminescent layer 403 away from the first electrode layer 401. In some examples, as Figure 10a shown, the third electrode layer 406 and the non-adjustable nanoantenna unit 4042 are respectively disposed on the electroluminescent layer 403. In other examples, as Figure 10b shown, the third electrode layer 406 is located on a side of the non-adjustable nanoantenna unit 4042 away from the electroluminescent layer 403, and the third electrode layer 406 is in contact with the non-adjustable nanoantenna unit 4042.

[0121] It should be understood that the third electrode layer 406 and the non-adjustable nanoantenna unit 4042 are respectively disposed on the electroluminescent layer 403, that is, there is no stacking relationship between the third electrode layer 406 and the non-adjustable nanoantenna unit 4042. For example, the third electrode layer 406 and the non-adjustable nanoantenna unit 4042 can both be in contact with the electroluminescent layer 403.

[0122] Here, a voltage can be applied to the first electrode layer 401 and the third electrode layer 406 to cause the electroluminescent layer 403 to emit light, and a voltage can be applied to the first electrode layer 401 and the second electrode layer 402 to cause the adjustable nanoantenna unit 4041 to convert from an insulating state to a metallic state. Here, a voltage can be applied to the first electrode layer 401, the second electrode layer 402, and the third electrode layer 406 in the light-emitting device 40 through the driving circuit 161.

[0123] In some embodiments, the third electrode layer 406 and the non-tunable nanoantenna unit 4042 are made of the same material. In other embodiments, the third electrode layer 406 and the non-tunable nanoantenna unit 4042 are made of different materials. When the third electrode layer 406 and the non-tunable nanoantenna unit 4042 are made of the same material, the third electrode layer 406 and the non-tunable nanoantenna unit 4042 can be fabricated simultaneously, thereby simplifying the manufacturing process of the light-emitting device 40. The specific manufacturing process is as follows: a conductive thin film is formed, and the conductive thin film is patterned to simultaneously form the third electrode layer 406 and the non-tunable nanoantenna unit 4042.

[0124] In the case where the third electrode layer 406 and the non-tunable nanoantenna unit 4042 are respectively disposed on the electroluminescent layer 403, in some embodiments, as Figure 10a shown, the third electrode layer 406 and the non-tunable nanoantenna unit 4042 do not contact each other. In other embodiments, as Figure 11 shown, the third electrode layer 406 and the non-tunable nanoantenna unit 4042 are in contact. Based on the above process of simultaneously fabricating the third electrode layer 406 and the non-tunable nanoantenna unit 4042, when the third electrode layer 406 and the non-tunable nanoantenna unit 4042 are in contact and the third electrode layer 406 and the non-tunable nanoantenna unit 4042 are made of the same material, during the patterning of the conductive thin film, there is no need to etch away the conductive thin film between the third electrode layer 406 and the non-tunable nanoantenna unit 4042, thus further simplifying the manufacturing process of the light-emitting device 40.

[0125] In the case where the third electrode layer 406 and the non-tunable nanoantenna unit 4042 are in contact, considering that both the third electrode layer 406 and the non-tunable nanoantenna unit 4042 are made of conductive materials, when an electric current is applied to the third electrode layer 406, if as Figure 11 shown, the third electrode layer 406 is disposed in the arrangement direction of the plurality of nanoantenna units in the nanoantenna layer 404, then the third electrode layer 406 will affect the length of the effective part in the nanoantenna layer 404, and in this way, the wavelength band of the light radiated from the nanoantenna layer 404 will change. Based on this, in some embodiments, the third electrode layer 406 and the non-tunable nanoantenna unit 4042 are respectively disposed on the electroluminescent layer 403, as Figure 12a and Figure 12b shown, along a direction perpendicular to the arrangement direction of the plurality of nanoantenna units, the third electrode layer 406 is located on one side of the non-tunable nanoantenna unit 4042.

[0126] Att Figure 12b ached is a top view, Figure 12b and the direction indicated by the double arrow in

[0127] Since the third electrode layer 406 is located on one side of the non-adjustable nanoantenna unit 4042 along the direction perpendicular to the arrangement direction of the plurality of nanoantenna units, the influence of the third electrode layer 406 on the length of the effective part in the nanoantenna layer 404 can be avoided.

[0128] The embodiment of the present application further provides a control method for a light-emitting device 40, which can be used to control the light emission of the above-mentioned light-emitting device 40. The control method includes: applying a voltage to the first electrode layer 401 in the light-emitting device 40.

[0129] It should be noted that the first electrode layer 401 is used to enable the electroluminescent layer 403 to generate photons. In order to enable the electroluminescent layer 403 to emit light, in some embodiments, the nanoantenna layer 404 in the light-emitting device 40 can be reused as an electrode, and the above control method further includes: applying a voltage to the nanoantenna layer 404. By applying voltages to the first electrode layer 401 and the nanoantenna layer 404, the electroluminescent layer 403 can generate photons under the action of the electric fields generated by the first electrode layer 401 and the nanoantenna layer 404.

[0130] In other embodiments, the light-emitting device 40 further includes the above-mentioned third electrode layer 406, and the above control method further includes: applying a voltage to the third electrode layer 406. By applying voltages to the first electrode layer 401 and the third electrode layer 406, the electroluminescent layer 403 located between the first electrode layer 401 and the third electrode layer 406 can generate photons under the action of the electric fields generated by the first electrode layer 401 and the third electrode layer 406.

[0131] In some embodiments, the light-emitting device 40 includes the above-mentioned second electrode layer 402, and the above control method further includes: applying a voltage to the second electrode layer 402 to cause the adjustable nanoantenna unit 4041 located between the first electrode layer 401 and the second electrode layer 402 to be converted from an insulating state to a metallic state under the action of the electric fields generated by the first electrode layer 401 and the second electrode layer 402.

[0132] Based on the above, the first processor 11 can control the driving circuit 161 to apply voltages to the first electrode layer 401, the second electrode layer 402, and the third electrode layer 406 in the light-emitting device 40.

[0133] On this basis, the light emission intensity of the light-emitting device 40 can be controlled by controlling the light emission duration of the light-emitting device 40.

[0134] When the light-emitting device 40 is applied to the display panel 160, as Figure 13As shown, the display panel 160 includes a plurality of light-emitting devices 40. In some embodiments, the electroluminescent layer 403 in the light-emitting device 40 is an organic electroluminescent layer, and at this time, the display panel 160 is an OLED display panel; alternatively, the electroluminescent layer 403 in the light-emitting device 40 is a quantum electroluminescent layer, and at this time, the display panel 160 is a QLED display panel. In this case, a plurality of light-emitting devices 40 can be fabricated on the substrate 10 simultaneously. To avoid the mutual influence of the light emitted by adjacent light-emitting devices 40, in some embodiments, the above-mentioned display panel 160 further includes a pixel definition layer 50 disposed on the substrate 10. The pixel definition layer 50 includes a plurality of opening regions, and one light-emitting device 40 is located in one opening region.

[0135] In some other embodiments, the electroluminescent layer 403 in the light-emitting device 40 is an inorganic electroluminescent layer, and at this time, the display panel 160 is a micro-LED display panel. In this case, a plurality of light-emitting devices 40 can be formed on the donor substrate first, and then the plurality of light-emitting devices 40 are peeled off from the donor substrate and transferred onto the substrate 10 to form the display panel 160.

[0136] Since the display panel 160 includes the light-emitting device 40, and the light-emitting device 40 includes a nanoantenna layer 404, when the photons generated by the electroluminescent layer 403 exit to the surface of the nanoantenna layer 404 close to the electroluminescent layer 403, surface plasmons will be generated on the surface of the nanoantenna layer 404 close to the electroluminescent layer 403, and the surface plasmons will conduct along the nanoantenna layer 404 and radiate outward on the surface of the nanoantenna layer 404. Therefore, the photons that were originally difficult to radiate outward in the electroluminescent layer 403 can be more easily radiated outward, thereby greatly improving the luminous efficiency of the light-emitting device 40, and thus improving the luminous efficiency of the display panel 160.

[0137] It should be understood that the display panel 160 is usually composed of a large number of pixels, and one pixel includes, for example, three sub-pixels. Currently, the size of the pixels in the display panel 160 is set to be smaller and smaller. On the one hand, since the smaller the size of the display panel 160, the smaller the size of the pixels in the display panel 160. For example, the pixel size of the display panel 160 in a mobile phone is smaller than that of the display panel 160 in a television. For the display panel in a VR display device or an AR display device, the pixel size is even smaller. And now the size of the display panel is gradually decreasing, resulting in the gradual decrease of the pixel size. On the other hand, in order to increase the contrast of the display panel 160, the size of the pixels in some large-size display panels 160 is also set to be smaller and smaller. The decrease in the pixel size not only makes the process complex, but also leads to an increase in the proportion of sidewall damage of the electroluminescent layer 403 in the light-emitting device 40. Specifically, refer to Figure 1For an OLED display panel, when the electroluminescent layer 403 is fabricated, the sidewalls of the electroluminescent layer 403 in each light-emitting device 40 will be damaged. The smaller the size of the pixel, the more sub-pixels are included in the display panel of the same area, and the proportion of the sidewall damage of the electroluminescent layer 403 becomes larger, resulting in a rapid decrease in the luminous efficiency as the number of pixels increases, and the luminous efficiency of the display panel 160 is too low.

[0138] In the embodiments of the present application, in addition to the nano-antenna layer 404 provided in the light-emitting device 40, the luminous efficiency of the display panel 160 can be improved. Based on the above, when the nano-antenna layer 404 in the light-emitting device 40 includes a plurality of nano-antenna units arranged in sequence, and the plurality of nano-antenna units include tunable nano-antenna units 4041, the light-emitting device 40 can emit light of multiple colors. Therefore, one light-emitting device 40 in the present application is equivalent to multiple sub-pixels in the prior art, that is, equivalent to one pixel in the prior art. In this way, the size of the light-emitting device 40 does not need to be set small to reduce the pixel size. Compared with the prior art, the manufacturing process of the display panel 160 is simplified. In addition, in the embodiments of the present application, the size of the light-emitting device 40 can be set larger than that of the light-emitting device 40 in the prior art. In this way, the proportion of the sidewall damage of the electroluminescent layer 403 is reduced, and thus the luminous efficiency of the display panel 160 can also be improved.

[0139] When the light-emitting device 40 is applied to the display panel 160, in order to ensure that the display panel 160 can achieve color display, the following five specific implementation manners are provided.

[0140] The first one: The display panel 160 includes a plurality of pixels, each pixel includes one light-emitting device 40, the nano-antenna layer 404 in the light-emitting device 40 includes a plurality of nano-antenna units arranged in sequence, the plurality of nano-antenna units include tunable nano-antenna units 4041, and the light-emitting device 40 further includes a second electrode layer 402 disposed on the side of the tunable nano-antenna unit 4041 away from the electroluminescent layer 403.

[0141] Based on the above, when the nano-antenna layer 404 in the light-emitting device 40 includes a plurality of nano-antenna units arranged in sequence, and the plurality of nano-antenna units include tunable nano-antenna units 4041, the light-emitting device 40 can emit light of multiple colors.

[0142] The control method of the display panel 160 includes: applying a voltage to the first electrode layer 401 of the light-emitting device 40; applying a voltage to the first group of second electrode layers 402 during a first predetermined time period within the display period T, and applying a voltage to the second group of second electrode layers 402 during a second predetermined time period within the display period T, so that the adjustable nanoantenna unit 4041 located between the first electrode layer 401 and the second electrode layer 402 is converted from an insulating state to a metallic state under the action of the electric field generated by the first electrode layer 401 and the second electrode layer 402; wherein, the number of the first group of second electrode layers 402 is different from the number of the second group of second electrode layers 402.

[0143] Here, T should satisfy the limitation of the human eye's persistence of vision effect, for example, T = 1 ms.

[0144] It should be noted that since the number of the first group of second electrode layers 402 is different from the number of the second group of second electrode layers 402, the length of the effective part in the nanoantenna layer 404 during the first predetermined time period is different from the length of the effective part in the nanoantenna layer 404 during the second predetermined time period. Therefore, the color of the light emitted by the light-emitting device 40 during the first predetermined time period is different from the color of the light emitted by the light-emitting device 40 during the second predetermined time period. Based on this, the color of the light emitted during the first predetermined time period can be adjusted by adjusting the number of the first group of second electrode layers 402, and the color of the light emitted during the second predetermined time period can be adjusted by adjusting the number of the second group of second electrode layers 402.

[0145] On this basis, since the equivalent luminous intensity can be controlled by controlling the light-emitting duration of the light-emitting device 40, the intensity of the light emitted during the first predetermined time period can be controlled by controlling the duration of the first predetermined time period, and the intensity of the light emitted during the second predetermined time period can be controlled by controlling the duration of the second predetermined time period.

[0146] Based on the above, by controlling the color and intensity of the light emitted by the light-emitting device 40 during the first predetermined time period and the second predetermined time period, the color of the light emitted by the light-emitting device 40 within a display period T can be controlled, so that the display panel 160 can achieve color display.

[0147] In addition, it should be understood that the above display period T can be divided into multiple predetermined time periods as needed, including but not limited to the above first predetermined time period and second predetermined time period.

[0148] Specifically, during display, each light-emitting device 40 can emit light of different colors by means of time-division multiplexing. It should be understood that when the light-emitting device 40 emits light of a specific color within a display period T, it can be formed by mixing multiple primary colors. Assuming that each light-emitting device 40 includes n primary colors, and the light-emitting intensity of the i-th primary color is Pi, where i = 1, 2,..., n, the equivalent light-emitting intensity can be controlled by the light-emitting duration. That is, a display period T is divided into n time periods, and each time period displays one color. The display duration of the i-th color is Ti, and the relationship between the display durations of the n colors and the light-emitting intensities is T1:T2:...:Tn = P1:P2:...:Pn, and T1 + T2 +... + Tn = T. Based on this, by controlling the emission of the i primary colors by the light-emitting device 40 and the light-emitting durations of the i primary colors, the light-emitting device 40 can be controlled to emit light of a specific color within a display period T. It should be understood that when the light-emitting device 40 emits light of the i-th color, in addition to controlling the electroluminescent layer 403 to emit light, the length of the effective part in the nanoantenna layer 404 should also be controlled by controlling the energization or power-off of the second electrode layer 402, so as to emit light of the corresponding primary color from the nanoantenna layer 404.

[0149] The second type: The display panel 160 includes a plurality of pixels, each pixel includes a plurality of light-emitting devices 40, and the nanoantenna layer 404 in the light-emitting device 40 includes a plurality of nanoantenna units arranged in sequence. The plurality of nanoantenna units include adjustable nanoantenna units 4041, and the light-emitting device 40 further includes a second electrode layer 402 disposed on the side of the adjustable nanoantenna unit 4041 away from the electroluminescent layer 403.

[0150] The control method of the above display panel 160 further includes: applying a voltage to the first electrode layer 401 of the light-emitting device 40; applying a voltage to the second electrode layers 402 of the plurality of light-emitting devices in the pixel, so that the adjustable nanoantenna unit 4041 located between the first electrode layer 401 and the second electrode layer 402 is converted from an insulating state to a metallic state under the action of the electric field generated by the first electrode layer 401 and the second electrode layer 402; wherein, the number of the second electrode layers 402 to which the plurality of light-emitting devices 40 in the pixel are applied with voltage is different.

[0151] Here, since the length of the effective part in the nanoantenna layer 404 is related to the number of the second electrode layers 402 to which the light-emitting device 40 is applied with voltage, and the length of the effective part in the nanoantenna layer 404 determines the color of the light emitted by the light-emitting device 40, the number of the second electrode layers 402 to which the light-emitting device 40 is applied with voltage determines the color of the light emitted by the light-emitting device 40. Based on this, since the number of the second electrode layers 402 to which the plurality of light-emitting devices 40 in the pixel are applied with voltage is different, the colors of the light emitted by the plurality of light-emitting devices 40 in the pixel are different, so that the display panel 160 can achieve color display.

[0152] The third type: The display panel 160 includes a plurality of pixels, and each pixel includes a first light-emitting device and a second light-emitting device; wherein, the wavelength range of the surface plasmons of the nanoantenna layer 404 in the first light-emitting device is different from the wavelength range of the surface plasmons of the nanoantenna layer 404 in the second light-emitting device.

[0153] The fourth type: The display panel 160 includes a plurality of pixels, and each pixel includes a first light-emitting device and a second light-emitting device; the shape of the nanoantenna layer 404 is strip-shaped; the length of the nanoantenna layer 404 in the first light-emitting device is different from the length of the nanoantenna layer 404 in the second light-emitting device.

[0154] The fifth type: The display panel 160 includes a plurality of pixels, and each pixel includes a first light-emitting device and a second light-emitting device; the material of the nanoantenna layer 404 in the first light-emitting device is different from the material of the nanoantenna layer 404 in the second light-emitting device.

[0155] Since the wavelength of the light radiated from the nanoantenna layer 404 is related to the wavelength range of the surface plasmons of the nanoantenna layer 404, the length of the nanoantenna layer 404, and the material of the nanoantenna layer 404, etc., when the wavelength range of the surface plasmons of the nanoantenna layer 404 in the first light-emitting device is different from the wavelength range of the surface plasmons of the nanoantenna layer 404 in the second light-emitting device, or, the length of the nanoantenna layer 404 in the first light-emitting device is different from the length of the nanoantenna layer 404 in the second light-emitting device, or, the material of the nanoantenna layer 404 in the first light-emitting device is different from the material of the nanoantenna layer 404 in the second light-emitting device, the color of the light emitted from the first light-emitting device is different from the color of the light emitted from the second light-emitting device, so that the display panel 160 can achieve color display.

[0156] The control methods of the third, fourth, and fifth display panels 160 provided above are similar to the control method of the above-mentioned light-emitting device 40. Specifically, reference can be made to the control method of the above-mentioned light-emitting device 40, which will not be elaborated here.

[0157] In the case where the light-emitting device 40 includes the third electrode layer 406, in some embodiments, as Figure 14 shown, a plurality of first electrode layers 401 in the light-emitting devices 40 located in the same column in the display panel 160 are electrically connected together, and a plurality of third electrode layers 406 in the light-emitting devices 40 located in the same row are electrically connected together.

[0158] Here, a plurality of light-emitting devices 40 are arranged in rows and columns, and the rows and rows or columns and columns can also be aligned with each other or not aligned. In addition, the above-mentioned "rows" and "columns" can be exchanged.

[0159] During display, the multiple third electrode layers 406 in the light-emitting devices 40 in the same row are energized row by row, and whether the light-emitting devices 40 in the currently energized row emit light is controlled by energizing or de-energizing the multiple first electrode layers 401 in the light-emitting devices 40 in each column. Specifically, when the multiple third electrode layers 406 in the light-emitting devices 40 in the current row are energized, if the multiple first electrode layers 401 in the light-emitting devices 40 in a certain column are energized, the electroluminescent layer 403 in the light-emitting devices 40 in the current row where the light-emitting devices 40 in this column are located emits photons under the action of the electric field generated by the first electrode layer 401 and the third electrode layer 406. It should be noted that although only one row is displayed each time, the speed of energizing row by row is very fast, and the light-emitting speed of the light-emitting devices 40 is also very fast. Therefore, what the human eye sees is still a complete image.

[0160] When the multiple first electrode layers 401 in the light-emitting devices 40 in the same column are electrically connected together and the multiple third electrode layers 406 in the light-emitting devices 40 in the same row are electrically connected together, there is no need to energize each first electrode layer 401 and third electrode layer 406 separately. Thus, the manufacturing process of the display panel 160 can be simplified, and the control process of the first electrode layer 401 and the third electrode layer 406 can be simplified.

[0161] In some other embodiments, the multiple first electrode layers 401 in the display panel 160 are independent of each other, and the multiple third electrode layers 406 are independent of each other. When a certain light-emitting device 40 needs to emit light, the first electrode layer 401 and the third electrode layer 406 in this light-emitting device 40 are energized, and then the electroluminescent layer 403 in this light-emitting device 40 can emit light under the action of the electric field generated by the first electrode layer 401 and the third electrode layer 406.

[0162] Alternatively, the multiple first electrode layers 401 in the display panel 160 are electrically connected together, and the multiple third electrode layers 406 are independent of each other. The multiple first electrode layers 401 that are electrically connected together are energized. When a certain light-emitting device 40 needs to emit light, the third electrode layer 406 in this light-emitting device 40 is energized, and then the electroluminescent layer 403 in this light-emitting device 40 can emit light under the action of the electric field generated by the first electrode layer 401 and the third electrode layer 406.

[0163] When the multiple first electrode layers 401 are independent of each other, or the multiple third electrode layers 406 are independent of each other, each light-emitting device 40 can be controlled separately. Thus, the control process is more flexible, and the refresh speed of the display panel 160 is faster.

[0164] In the case where the light-emitting device 40 includes a second electrode layer 402, in some embodiments, such as Figure 14As shown, a plurality of first electrode layers 401 in the light-emitting devices 40 in the same column in the display panel 160 are electrically connected together; a plurality of second electrode layers 402 in the light-emitting devices 40 in the same row are electrically connected together.

[0165] Here, a plurality of second electrode layers 402 in the light-emitting devices 40 in the same row are electrically connected together, including: for the light-emitting devices 40 in the same row, one or more second electrode layers 402 in any one light-emitting device 40 are electrically connected to one or more second electrode layers 402 in other light-emitting devices 40.

[0166] In some examples, for the light-emitting devices 40 in the same row, each second electrode layer 402 in the light-emitting device 40 is electrically connected to one second electrode layer 402 in other light-emitting devices 40.

[0167] Appendix Figure 14 Taking the light-emitting device 40 including two second electrode layers 402, namely the second electrode layer 402a and the second electrode layer 402b, as an example for illustration. Among them, for the light-emitting devices 40 in the same row, the second electrode layers 402a in each light-emitting device 40 are electrically connected together, and the second electrode layers 402b in each light-emitting device 40 are electrically connected together.

[0168] When displaying, power is supplied to the plurality of second electrode layers 402 in the light-emitting devices 40 in the same row row by row, and the color of the light emitted by the light-emitting devices 40 in the current row being powered is controlled by supplying power to or cutting off power from the plurality of first electrode layers 401 in the light-emitting devices 40 in each column. Specifically, when the plurality of second electrode layers 402 in the light-emitting devices 40 in the current row are powered on, if the plurality of first electrode layers 401 in the light-emitting devices 40 in a certain column are powered on, the tunable nanoantenna units 4041 in the light-emitting devices 40 in the current row where the light-emitting devices 40 in this column are located are converted into a metallic state under the action of the electric field generated by the first electrode layer 401 and the second electrode layer 402, thereby adjusting the length of the effective part in the nanoantenna layer 404, and further adjusting the color of the light radiated from the nanoantenna layer 404.

[0169] When a plurality of first electrode layers 401 in the light-emitting devices 40 in the same column in the display panel 160 are electrically connected together and a plurality of second electrode layers 402 in the light-emitting devices 40 in the same row are electrically connected together, there is no need to supply power to each first electrode layer 401 and second electrode layer 402 separately, so the manufacturing process of the display panel 160 can be simplified, and the control process of the first electrode layer 401 and the second electrode layer 402 can be simplified.

[0170] In some other embodiments, multiple first electrode layers 401 in the display panel 160 are independent of each other, and multiple second electrode layers 402 are independent of each other. Alternatively, multiple first electrode layers 401 in the display panel 160 are electrically connected together, and multiple second electrode layers 402 are independent of each other. When a certain light-emitting device 40 emits light, the color of the light emitted by the light-emitting device 40 can be controlled by energizing the second electrode layer 402 in the light-emitting device 40.

[0171] When multiple second electrode layers 402 are independent of each other, the color of the light emitted by each light-emitting device 40 can be controlled individually, so the control process is more flexible.

[0172] It should be understood that the above-mentioned display panel 160 includes but is not limited to the first light-emitting device and the second light-emitting device. In order to achieve full-color display, the display panel 160 may further include a third light-emitting device, and the color of the light emitted by the third light-emitting device is different from the colors of the light emitted by the first light-emitting device and the second light-emitting device.

[0173] It should be noted that the above-mentioned light-emitting device 40 can be applied not only in the display panel 160 for display, but also in other light-emitting devices for lighting and the like.

[0174] The embodiment of the present application further provides a control device, which includes a second processor and a first memory; program codes are stored in the first memory, and when the program codes are executed by the second processor, the control method of the above-mentioned light-emitting device 40 is implemented; or, the control method of the above-mentioned display panel 160 is implemented.

[0175] Here, the control device can be, for example, an FPGA (Field Programmable Gate Array).

[0176] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present application, and all should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A light-emitting device, characterized in that, Comprising: A first electrode layer, an electroluminescent layer, and a nanoantenna layer arranged in sequence; Wherein, the first electrode layer is used to enable the electroluminescent layer to generate photons; The nanoantenna layer is used to generate surface plasmons on the surface when the photons exit to the surface of the nanoantenna layer close to the electroluminescent layer; the nanoantenna layer includes a plurality of nanoantenna units arranged in sequence; two adjacent nanoantenna units are in contact; the plurality of nanoantenna units include tunable nanoantenna units; The light-emitting device further includes a second electrode layer disposed on the side of the tunable nanoantenna unit away from the electroluminescent layer; Wherein, the tunable nanoantenna unit is used to convert between an insulating state and a metallic state under the action of the electric fields generated by the first electrode layer and the second electrode layer.

2. The light-emitting device according to claim 1, wherein, The tunable nanoantenna unit is used to convert to a metallic state when the electric field intensity of the electric fields generated by the first electrode layer and the second electrode layer is greater than an electric field threshold; or, convert to an insulating state when the electric field intensity of the electric fields generated by the first electrode layer and the second electrode layer is less than or equal to the electric field threshold.

3. The light-emitting device according to claim 1 or 2, characterized in that, The first electrode layer is used to enable the electroluminescent layer to generate photons includes: the first electrode layer is used to generate an electric field with the nanoantenna layer, so as to enable the electroluminescent layer to generate photons under the action of the electric field.

4. The light-emitting device according to claim 1 or 2, characterized in that, The light-emitting device further includes a third electrode layer disposed on the side of the electroluminescent layer away from the first electrode layer; The first electrode layer is used to enable the electroluminescent layer to generate photons includes: the first electrode layer is used to generate an electric field with the third electrode layer, so as to enable the electroluminescent layer to generate photons under the action of the electric field.

5. The light-emitting device according to claim 1, wherein The plurality of nanoantenna units further include non-tunable nanoantenna units; One side of the non-tunable nanoantenna unit is provided with the tunable nanoantenna unit along a first direction, and the other side of the non-tunable nanoantenna unit is provided with the tunable nanoantenna unit along a second direction; Wherein, the non-tunable nanoantenna unit is in a metallic state, and the first direction and the second direction intersect.

6. The light-emitting device according to claim 5, characterized in that, The first direction and the second direction are perpendicular to each other.

7. The light-emitting device according to claim 1, characterized in that, The light-emitting device further includes an insulating layer disposed between the tunable nanoantenna unit and the second electrode layer.

8. The light-emitting device according to claim 1, wherein, The material of the tunable nanoantenna unit includes at least one of vanadium dioxide and germanium antimony telluride compounds.

9. The light-emitting device according to claim 5, wherein The light-emitting device further includes a third electrode layer disposed on the side of the electroluminescent layer away from the first electrode layer; The third electrode layer and the non-tunable nanoantenna unit are respectively disposed on the electroluminescent layer.

10. The light-emitting device according to claim 5, wherein The light-emitting device further includes a third electrode layer; The third electrode layer is disposed on the side of the non-tunable nanoantenna unit away from the electroluminescent layer, and the third electrode layer is in contact with the non-tunable nanoantenna unit.

11. The light-emitting device according to claim 9 or 10, characterized in that, The third electrode layer and the non-tunable nanoantenna unit have the same material.

12. The light-emitting device according to claim 9, wherein The third electrode layer is in contact with the non-tunable nanoantenna unit.

13. The light-emitting device according to claim 9 or 12, characterized in that, Along the direction perpendicular to the arrangement direction of the plurality of nanoantenna units, the third electrode layer is located on one side of the non-tunable nanoantenna unit.

14. An electronic device, characterized in that, Comprising a plurality of light-emitting devices as described in any one of claims 1-13.

15. The electronic device according to claim 14, wherein A plurality of the first electrode layers in the light-emitting devices located in the same column are electrically connected together; a plurality of the second electrode layers in the light-emitting devices located in the same row are electrically connected together.

16. The electronic device according to claim 14, characterized in that, The electronic device comprises a plurality of light-emitting devices as described in claim 4, 9 or 10; A plurality of the first electrode layers in the light-emitting devices located in the same column are electrically connected together, and a plurality of the third electrode layers in the light-emitting devices located in the same row are electrically connected together.

17. The electronic device according to any one of claims 14-16, characterized in that, The plurality of light-emitting devices include a first light-emitting device and a second light-emitting device; Wherein, the wavelength range of the surface plasmon of the nanoantenna layer in the first light-emitting device is different from the wavelength range of the surface plasmon of the nanoantenna layer in the second light-emitting device.

18. The electronic device according to any one of claims 14-16, characterized in that, The plurality of light-emitting devices include a first light-emitting device and a second light-emitting device; the shape of the nanoantenna layer is strip-shaped; The length of the nanoantenna layer in the first light-emitting device is different from the length of the nanoantenna layer in the second light-emitting device.

19. The electronic device according to any one of claims 14-16, characterized in that, The plurality of light-emitting devices include a first light-emitting device and a second light-emitting device; The material of the nanoantenna layer in the first light-emitting device is different from the material of the nanoantenna layer in the second light-emitting device.

20. The electronic device according to any one of claims 14-16, characterized in that, The electronic device further includes a driving circuit; The driving circuit is configured to apply a voltage to the first electrode layer in the light-emitting device.

21. The electronic device according to claim 20, characterized in that, The electronic device further includes a first processor; the first processor is configured to control the driving circuit to apply a voltage to the first electrode layer in the light-emitting device.

22. A method for controlling a light-emitting device according to any one of claims 1 to 13, characterized in that, The method includes: applying a voltage to the first electrode layer in the light-emitting device.

23. The method according to claim 22, wherein The method further includes: Applying a voltage to the second electrode layer to cause the tunable nanoantenna unit located between the first electrode layer and the second electrode layer to be converted from an insulating state to a metallic state under the action of the electric field generated by the first electrode layer and the second electrode layer.

24. The method according to claim 22 or 23, characterized in that, The method is used to control the light-emitting device as described in claim 4, 9 or 10; The method further includes: Applying a voltage to the third electrode layer to cause the electroluminescent layer located between the first electrode layer and the third electrode layer to generate photons under the action of the electric field generated by the first electrode layer and the third electrode layer.

25. A method for controlling an electronic device according to any one of claims 14 - 21, characterized in that, The method includes: Applying a voltage to the first electrode layer of the light-emitting device.

26. The method according to claim 25, characterized in that, The electronic device includes a plurality of pixels, and each pixel includes one of the light-emitting devices; The method further includes: Applying a voltage to a first group of the second electrode layers during a first predetermined time period within a display period, and applying a voltage to a second group of the second electrode layers during a second predetermined time period within the display period, so that the tunable nanoantenna unit located between the first electrode layer and the second electrode layer is converted from an insulating state to a metallic state under the action of the electric field generated by the first electrode layer and the second electrode layer; Wherein, the number of the first group of the second electrode layers is different from the number of the second group of the second electrode layers.

27. A control device, characterized in that, Comprising a second processor and a first memory; program code is stored in the first memory, and when the program code is executed by the second processor, the method according to any one of claims 22-24 is implemented; or, the method according to claim 25 or 26 is implemented.

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