A display device and a method of adjusting a display device

Abstract

A display device (40) and a method for adjusting the display device (40). The display device (40) includes at least one display unit (240), which includes a first control circuit (41), a first light-emitting pixel (43), a polarization layer (44), a second control circuit (42), and a nano-antenna structure (45). The second control circuit (42) can be connected to the polarization layer (44). By applying a certain voltage to the polarization layer (44), the polarization direction of the second light beam emitted from the polarization layer (44) is changed, thereby changing the scattering angle of the third light beam emitted from the nano-antenna structure (45). When the second control circuit (42) is connected to the nano-antenna structure (45), the material properties of the nano-antenna structure (45) are utilized to change the scattering angle of the third light beam by applying a certain voltage to the nano-antenna structure (45). Both connection structures change the scattering angle of the third light beam, allowing it to switch between a wide angle and a narrow angle range, thereby achieving an anti-peeping effect.

Description

Technical Field

[0001] This application relates to the field of optics, and in particular to a display device and a method for adjusting the display device. Background Technology

[0002] With the widespread use of various electronic devices, displaying text, images, videos, and other content on screens has become a primary way for people to obtain information. Currently, the vast majority of electronic screens are set to a wide-angle viewing mode, such as... Figure 1A As shown. This means that not only the user (the primary viewer) can see the information on the screen, but also bystanders around them. However, in some scenarios, such as handling important documents in temporary spaces like meeting rooms, waiting areas, or cafes, or browsing personal information or checking subscriptions in confined environments like subways or elevators, users of electronic devices do not want unrelated bystanders to see the information on the screen. Therefore, electronic screens sometimes need to have anti-peeping features. This anti-peeping feature is generally achieved by narrowing the display angle of the electronic screen, such as... Figure 1B As shown.

[0003] In the industry, the simplest way to implement privacy protection is to attach a privacy screen protector to the screen. This protector contains an array of light-blocking elements that obstruct light emitted at specific angles, thus limiting the viewing angle. However, using such protectors has some inconveniences, such as requiring a certain level of application skill and difficulty in reusing them after application. Users desire better solutions that reduce the difficulty of use, increase flexibility, and even provide more innovative display functions. To meet these needs, integrated devices with dynamically adjustable viewing angles are gradually becoming part of electronic screens. Summary of the Invention

[0004] This application provides a display device and a method for adjusting the display device, used to provide different display modes. When the display mode is a viewing angle with a narrow scattering angle, it can achieve an anti-peeping effect. Specifically, this application discloses the following technical solutions:

[0005] In a first aspect, this application provides a display device comprising at least one display unit. Each display unit includes: a first control circuit, a light-emitting pixel, a polarization layer, a second control circuit, and a nanoantenna structure. The first control circuit is connected to the light-emitting pixel and applies a voltage to the light-emitting pixel, causing the light-emitting pixel to emit a first light beam toward the polarization layer. The polarization layer is disposed on the light-emitting side of the light-emitting pixel and can be used to control the polarization direction of a second light beam, which is the emitted light beam after the first light beam passes through the polarization layer. The nanoantenna structure is disposed on the side of the polarization layer away from the light-emitting pixel and is used to control the scattering angle of a third light beam, which is the emitted light beam after the second light beam passes through the nanoantenna structure. The second control circuit is connected to the polarization layer or the nanoantenna structure and is used to change the scattering angle of the third light beam.

[0006] The polarization layer includes liquid crystal molecules, which are used to regulate the polarization of the light emitted by the light-emitting pixels.

[0007] The technical solution provided in this aspect, when the second control circuit is connected to the polarization layer, the second control circuit applies a certain voltage to the polarization layer, so that the first light beam generated by the light-emitting pixel enters the polarization layer and changes the polarization direction of the second light beam. The second light beam is the light beam emitted by the first light beam after passing through the polarization layer. The second light beam then passes through the nano-antenna structure and emits a third light beam. When the scattering angle of the emitted third light beam is smaller than before the voltage is applied, the smaller scattering angle can prevent peeping by changing the front part of the scattering range. When the scattering angle of the third light beam changes to a narrow angle, that is, the minimum scattering angle, the scattering direction is the forward direction. At this time, the display device is in anti-peeping display mode, which can effectively prevent peeping.

[0008] In addition, when the second control circuit is connected to the nanoantenna structure, the second control circuit applies a certain voltage to the nanoantenna structure, thereby changing the scattering angle of the third beam emitted from the nanoantenna structure, so that the scattering angle of the third beam switches in different ranges. When the scattering angle of the emitted third beam is a narrow angle and the scattering direction is forward, the display device forms a narrow scattering angle viewing angle. At this time, the display device is in anti-peeping display mode, which can effectively prevent peeping.

[0009] It should be noted that the display device in this application embodiment is pre-set with different scattering angles before leaving the factory, and different scattering angles correspond to different display ranges. For example, the display device is configured with two scattering angles, namely scattering angle 1 and scattering angle 2. Among them, scattering angle 1 is greater than scattering angle 2. When the display device displays within the range of scattering angle 1, it is in normal display mode; when the display device displays within the range of scattering angle 2, it is in anti-peeping mode.

[0010] In conjunction with the first aspect, in one possible implementation of the first aspect, the second control circuit is connected to the polarization layer or the nanoantenna structure to change the scattering angle of the third beam, including: the second control circuit is connected to the polarization layer or the nanoantenna structure to switch the operating mode of the nanoantenna structure between satisfying the Kerker condition and not satisfying the Kerker condition.

[0011] When the operating mode of the nanoantenna structure satisfies the Kerker condition, the scattering angle of the third beam is a first angle, which is a narrow scattering angle; when the operating mode of the nanoantenna structure does not satisfy the Kerker condition, the scattering angle of the third beam is a second angle, which is a wide scattering angle, and the first angle is different from the second angle.

[0012] Specifically, when the operating mode of the nanoantenna structure meets the Kerker condition, the first angle displayed corresponds to the anti-peeping display mode; when the Kerker condition is not met, the second angle displayed corresponds to the normal display mode.

[0013] In conjunction with the first aspect, in another possible implementation of the first aspect, the second control circuit is connected to the polarization layer and is used to change the scattering angle of the third beam, including: the second control circuit is connected to the polarization layer, the second control circuit applies a voltage to the polarization layer to change the polarization direction of the second beam; when the polarization direction of the second beam changes, the scattering angle of the third beam changes.

[0014] The nanoantenna structure includes a nanoantenna, which includes at least one of the following: a cubic nanoantenna, a cylindrical nanoantenna, or a combination of nanoantennas.

[0015] In conjunction with the first aspect, in another possible implementation of the first aspect, changing the polarization direction of the second beam includes: changing the polarization direction of the second beam so that the polarization direction of the second beam is parallel to the side length of the bottom surface of the cubic nanoantenna or the combined nanoantenna; or, changing the polarization direction of the second beam so that the polarization direction of the second beam is parallel to the long axis of the bottom surface of the cylindrical nanoantenna.

[0016] In this implementation, a certain voltage is applied to the polarization layer using the second control circuit, which can change the polarization direction of the incident light (first beam) in the polarization layer. This makes the polarization direction of the second beam emitted from the polarization layer parallel to the side length of the bottom surface of the cubic nanoantenna or the combined nanoantenna, or makes the polarization direction of the second beam parallel to the long axis of the bottom surface of the cylindrical nanoantenna. This allows the working mode of the nanoantenna structure to satisfy the Kerker condition, forming a narrow scattering angle and achieving the effect of preventing eavesdropping.

[0017] In conjunction with the first aspect, in another possible implementation of the first aspect, the nanoantenna structure includes a tunable material.

[0018] The second control circuit is connected to the nanoantenna structure and is used to change the scattering angle of the third beam. This includes: the second control circuit is connected to the nanoantenna structure; the second control circuit applies a voltage to the tunable material to change the properties of the tunable material; when the properties of the tunable material change, the scattering angle of the third beam changes.

[0019] In conjunction with the first aspect, in another possible implementation of the first aspect, the second control circuit applies a voltage to the tunable material to change the properties of the tunable material, including: the second control circuit applies a voltage to the tunable material to change the tunable material from an amorphous state to a crystalline state.

[0020] In conjunction with the first aspect, in another possible implementation of the first aspect, the second control circuit applies a voltage to the tunable material to change the tunable material from an amorphous state to a crystalline state, comprising: the second control circuit applying a voltage to the tunable material to change the tunable material from an amorphous state to a crystalline state, thereby changing the dielectric constant of the tunable material.

[0021] Optionally, the adjustable material includes germanium-antimony-tellurium material.

[0022] In this implementation, the adjustable material is set to germanium-antimony-tellurium material. By adjusting the dielectric constant of the germanium-antimony-tellurium material, the state of the germanium-antimony-tellurium material can be switched between amorphous and crystalline states. When the germanium-antimony-tellurium material is in the crystalline state, the polar mode of the nano-antenna structure that satisfies the Kerker condition can be excited, thereby enabling the display device to form a narrow scattering angle viewing angle.

[0023] In conjunction with the first aspect, in another possible implementation of the first aspect, the second control circuit applies a voltage to the tunable material to change the properties of the tunable material, including: the second control circuit applies a voltage to the tunable material to change the tunable material from a metallic state to a dielectric state.

[0024] In conjunction with the first aspect, in another possible implementation of the first aspect, the second control circuit applies a voltage to the tunable material to change the tunable material from a metallic state to a dielectric state, comprising: the second control circuit applying a voltage to the tunable material to change the tunable material from a metallic state to a dielectric state, thereby changing the conductivity of the tunable material.

[0025] Optionally, the adjustable material includes vanadium oxide.

[0026] In this implementation, the adjustable material is set to vanadium oxide. By adjusting the conductivity of the vanadium oxide material, the state of the vanadium oxide material can be switched between amorphous and crystalline states. When the vanadium oxide material is in the crystalline state, the polar mode of the nano-antenna structure that satisfies the Kerker condition can be excited, thereby enabling the display device to form a narrow scattering angle viewing angle.

[0027] In conjunction with the first aspect, in another possible implementation of the first aspect, the adjustable material is a liquid crystal material.

[0028] The second control circuit applies a voltage to the tunable material to change the properties of the tunable material, including: the second control circuit applies a voltage to the tunable material to change the long axis direction of the liquid crystal molecules in the liquid crystal material to be parallel to the bottom surface of the nanoantenna.

[0029] In this implementation, the adjustable material is set to a liquid crystal material. By adjusting the long axis direction of the liquid crystal molecules in the liquid crystal material, the polar mode of the nano-antenna structure that satisfies the Kerker condition can be excited, thereby enabling the display device to form a viewing angle with a narrow scattering angle.

[0030] Secondly, this application also provides an adjustment method for a display device, the method being applied to a display device, the display device being the apparatus described in various implementations of the first aspect, the method comprising: acquiring a first instruction from a first target user, the first instruction instructing the display device to activate an anti-peeping display mode; sending a second instruction to the display device, the second instruction instructing a second control circuit of the display device to apply a voltage to a polarization layer or a nanoantenna structure to change the viewing angle of the display device to the first viewing angle, the first viewing angle being determined based on the position of the first target user.

[0031] In this method, based on the first viewing angle, the display range of at least one display unit in the display device is adjusted so that the first light beam generated by the light-emitting pixel passes through the polarization layer and emits a second light beam, and the second light beam passes through the nano-antenna structure and emits a third light beam. When the scattering angle of the emitted third light beam is a narrow angle and the scattering direction is forward, the Kerker condition is satisfied, forming a viewing angle with a narrow scattering angle. At this time, only users within the viewing angle range can view the display screen of the display device, while users outside the viewing angle cannot view the display screen, thereby achieving the beneficial effect of preventing peeping.

[0032] In conjunction with the second aspect, in one possible implementation of the second aspect, the location of the target user is a first location; the first viewing angle is determined based on the first location of the first target user.

[0033] The method further includes: obtaining a second location of the first target user, and sending a third instruction to the display device, the third instruction instructing the viewing angle of the display device to be changed from the first viewing angle to the second viewing angle; the second viewing angle is determined based on the second location of the first target user, and the second location is different from the first location.

[0034] This implementation method can track the target user's position when the target user's position changes, and adaptively adjust the viewing angle of the display device according to the target user's movement position, thereby achieving the beneficial effect of the display screen following the target user's position adjustment and improving the user experience.

[0035] In this embodiment, the display device is pre-configured with different scattering angles, such as scattering angle 1 and scattering angle 2, before leaving the factory. It also allows adjustment of the scattering direction by applying a certain voltage through a second control circuit. For example, when the second control circuit applies a first voltage, such as 10V, to the polarization layer or nanoantenna structure, the scattering angle of the third beam is changed to scattering angle 2, resulting in a narrow range of scattering angles and a forward scattering direction. When the first voltage is finely adjusted, such as by applying 10.1V to 10.5V, the scattering direction can be adjusted from the forward direction to a leftward direction. Alternatively, applying 9.9V to 9.5V can change the scattering direction from the forward direction to a rightward direction, so that the adjusted scattering direction of the third beam is directed towards the target user, thereby achieving the effect of tracking the target user. It should be noted that regardless of whether the adjusted scattering direction is forward, leftward, or rightward, the scattering angle remains scattering angle 2; that is, the scattering angle does not change with the scattering direction.

[0036] In conjunction with the second aspect, in another possible implementation of the second aspect, the display device includes a first display unit and a second display unit. Changing the viewing angle of the display device to the first viewing angle includes: changing the viewing angle of the first display unit of the display device to the first viewing angle, and changing the viewing angle of the second display unit of the display device to a third viewing angle, wherein the first viewing angle is determined based on the position of the first target user, and the third viewing angle is determined based on the position of the second target user.

[0037] This method can also adjust different display units of the display device to display different images, supporting the needs of multiple users to view different images on the same display screen. Furthermore, different display units display different viewing angles when subjected to different voltages, thereby achieving the beneficial effect of preventing interference between the content viewed by multiple users and preventing each other from being spied on.

[0038] Thirdly, embodiments of this application also provide a display adjustment device, which can be used to implement the methods in the aforementioned second aspect and various implementations of the second aspect.

[0039] The device includes an acquisition unit, a processing unit, and a display unit. Furthermore, the device may also include a transmission unit and a storage unit.

[0040] Fourthly, embodiments of this application also provide a display device, which includes a controller and a display device, wherein the controller and the display device can be connected via a circuit board, and the display device is the device described in the first aspect and various implementations thereof.

[0041] The controller includes at least one processor or processing unit.

[0042] Specifically, the controller is configured to acquire a first instruction from a first target user, the first instruction instructing the display device to activate an anti-peeping display mode; the controller is also configured to send a second instruction to the display device, the second instruction instructing a second control circuit of the display device to apply a voltage to the polarization layer or nanoantenna structure, changing the viewing angle of the display device to the first viewing angle. The first viewing angle is determined based on the position of the first target user.

[0043] In conjunction with the fourth aspect, in one possible implementation of the fourth aspect, when the target user's position is a first position, the controller is further configured to determine the first viewing angle based on the first position of the first target user.

[0044] The controller is further configured to acquire a second location of the first target user and send a third instruction to the display device, the third instruction instructing the viewing angle of the display device to be changed from the first viewing angle to the second viewing angle. The second viewing angle is determined based on the second location of the first target user, and the second location is different from the first location.

[0045] In conjunction with the fourth aspect, in another possible implementation of the fourth aspect, the display device includes a first display unit and a second display unit, and the controller is further configured to change the viewing angle of the first display unit of the display device to the first viewing angle, and to change the viewing angle of the second display unit of the display device to the third viewing angle, the third viewing angle being determined based on the position of the second target user.

[0046] In addition, the display device also includes a memory coupled to the controller.

[0047] The memory is used to store computer program instructions; when the controller is used to execute the program instructions, it implements the methods in the second aspect and various implementations of the second aspect.

[0048] Optionally, the memory may be located inside the controller, or it may be located outside the controller.

[0049] Optionally, the display device is a terminal device.

[0050] Optionally, the terminal device includes, but is not limited to, mobile phones, PCs, and tablet computers.

[0051] Fifthly, embodiments of this application also provide a computer-readable storage medium storing instructions that, when executed on a computer or processor, can be used to perform the methods described in the second aspect and various implementations thereof.

[0052] In addition, this application also provides a computer program product including computer instructions that, when executed by a computer or processor, can implement the methods in the second aspect and various implementations of the second aspect. Attached Figure Description

[0053] Figure 1A A schematic diagram of a wide-viewing-angle display mode for an electronic screen provided in this application;

[0054] Figure 1B A schematic diagram of a narrow viewing angle display mode for an electronic screen provided in this application;

[0055] Figure 2 A schematic diagram illustrating beam scattering under different pole modes provided in this application;

[0056] Figure 3 A schematic diagram illustrating the product form of a terminal device provided in this application;

[0057] Figure 4 A schematic diagram of the structure of a display device provided in this application;

[0058] Figure 5 A schematic diagram of the structure of a display unit provided in this application;

[0059] Figure 6 This is an enlarged schematic diagram of a nano-antenna structure provided in this application;

[0060] Figure 7A A schematic diagram of a nano-antenna structure provided in this application;

[0061] Figure 7B A schematic diagram of another nano-antenna structure provided in this application;

[0062] Figure 8 A schematic diagram of another display unit provided in this application;

[0063] Figure 9 A schematic diagram illustrating the propagation of a light beam in a display unit, as provided in this application;

[0064] Figure 10A A schematic diagram of a light source polarization irradiation cubic nanoantenna structure provided in this application;

[0065] Figure 10BA schematic diagram of another light source polarization irradiation cubic nanoantenna structure provided in this application;

[0066] Figure 10C A schematic diagram of a light source polarization irradiation assembly nanoantenna structure provided in this application;

[0067] Figure 10D A schematic diagram of another light source polarization irradiation combination nanoantenna structure provided in this application;

[0068] Figure 10E A schematic diagram of a cylindrical nanoantenna structure subjected to light source polarization irradiation provided in this application;

[0069] Figure 10F A schematic diagram of another light source polarization irradiation cylindrical nanoantenna structure provided in this application;

[0070] Figure 11A A schematic diagram illustrating a narrow scattering angle display range provided in this application;

[0071] Figure 11B A schematic diagram illustrating a wide scattering angle display range provided in this application;

[0072] Figure 12A A schematic diagram of a nanoantenna structure containing tunable material provided for this application;

[0073] Figure 12B A schematic diagram of another nanoantenna structure containing tunable material provided for this application;

[0074] Figure 12C A schematic diagram of yet another nanoantenna structure containing tunable material provided in this application;

[0075] Figure 12D A schematic diagram of a nanoantenna structure containing liquid crystal material provided in this application;

[0076] Figure 12E A schematic diagram of a nanoantenna structure comprising liquid crystal material and tunable material provided in this application;

[0077] Figure 13 A schematic diagram illustrating another type of light beam propagating in a display unit, as provided in this application;

[0078] Figure 14 A schematic diagram illustrating another type of light beam propagation in a display unit, provided in this application;

[0079] Figure 15A A schematic diagram of the state of liquid crystal molecules in an adjustable material before voltage is applied, provided in this application;

[0080] Figure 15BA schematic diagram illustrating the state of liquid crystal molecules in an adjustable material after applying voltage, as provided in this application;

[0081] Figure 16 A schematic diagram illustrating another type of light beam propagation in a display unit, provided in this application;

[0082] Figure 17 This application provides a scene diagram illustrating the adjustment of the viewing angle range;

[0083] Figure 18 This application provides a flowchart of a method for adjusting a display device;

[0084] Figure 19 This application provides an illustration of another usage scenario for adjusting the viewing angle range;

[0085] Figure 20A A flowchart of another adjustment method for a display device is provided for this application;

[0086] Figure 20B This application provides a schematic diagram showing User B moving from the first position to the second position;

[0087] Figure 21 This application provides a schematic diagram illustrating a scenario where different content is displayed on an in-vehicle terminal;

[0088] Figure 22 This application provides a schematic diagram of the structure of another display device;

[0089] Figure 23 A flowchart of another adjustment method for a display device is provided for this application;

[0090] Figure 24 This application provides a schematic diagram of the structure of another display device;

[0091] Figure 25 This application provides a schematic diagram of the structure of a display device. Detailed Implementation

[0092] To enable those skilled in the art to better understand the technical solutions in the embodiments of this application, the technical solutions in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0093] First, let's introduce the relevant technical terms and background of this embodiment.

[0094] 1. Constitutive parameters

[0095] In electromagnetic theory, constitutive parameters refer to parameters that describe the properties of tunable materials. They generally include three main parameters: dielectric constant, permeability, and conductivity.

[0096] 2. Polar mode

[0097] An electric dipole is a system consisting of two equal and opposite point charges. The characteristics of an electric dipole are described by its electric dipole moment p = ql, where l represents the distance between the two point charges, and the directions of l and p are defined as pointing from -q to +q. When an electric dipole is subjected to a torque in an external electric field, it rotates, causing its electric dipole moment to align with the direction of the external electric field.

[0098] Electric dipole mode: The field distribution is similar for a system of positive and negative charges with equal charges. Magnetic dipole mode: The field distribution is similar for a system of forward and reverse current loops with equal charges. Electric quadrupole mode: The simplest electric quadrupole consists of four equal charges placed at the four vertices of a square, with the two charges on each side having opposite signs. The resulting electromagnetic field mode is called an electric quadrupole mode. Magnetic quadrupole mode: The simplest electric quadrupole consists of four equal currents placed at the four vertices of a square, with the two currents on each side in opposite directions. The resulting electromagnetic field mode is called a magnetic quadrupole mode.

[0099] 3. Kerker Conditions for Nanoantennas

[0100] Generally speaking, a nanoantenna is a subwavelength-scale optical structure that can influence the propagation of light. Nanoantennas can be made from either metals or dielectrics. However, the working principle of metals differs from that of dielectrics. In metals, freely moving electrons can interact with light, thus affecting its propagation. In dielectrics, bound electrons often cannot move freely, but light can still generate displacement currents within the dielectric, thereby affecting its propagation.

[0101] As a scattering device, nanoantennas, when illuminated by a suitable light source (including the direction of illumination and polarization), can exhibit various polarization modes. These polarization modes can include electric dipole modes, magnetic dipole modes, electric quadrupole modes, magnetic quadrupole modes, and even higher-order electric and magnetic dipole modes. Furthermore, these polarization modes can coexist or not. When electric and magnetic polarization modes coexist and the Kerker condition is satisfied, forward unidirectional scattering occurs. This phenomenon is quite unique because under other conditions, scattering is often multi-directional. Specifically, the generalized definition of the Kerker condition is as follows:

[0102]

[0103] Where, α e α represents the scalar polarization of the nanoantenna itself, representing its electrical recombination. m α represents the magnetic recombination scalar polarizability. e and α mThe corresponding polarization modes are the electrode mode and the magnetic pole mode, respectively, and α e and α m It is affected by the shape of the nanoantenna and the dielectric constant or conductivity of the constituent materials. ε s μ represents the dielectric constant of the material surrounding the nanoantenna. s This represents the magnetic permeability of the material surrounding the nanoantenna.

[0104] The Kerker conditions for nanoantennas can be divided into the first Kerker condition and the second Kerker condition. The first Kerker condition refers to eliminating the backpropagating scattered field using electric and magnetic dipoles of equal intensity and phase, given a certain dielectric constant and permeability. The second Kerker condition refers to eliminating the forward propagating scattered field using electric and magnetic dipoles of equal intensity but opposite phase, given a certain dielectric constant and permeability.

[0105] In principle, nanoantennas can also provide higher-order pole modes, such as electric quadrupole and magnetic quadrupole modes. Therefore, the Kerker condition can be generalized to a "generalized Kerker condition," such as the generalized first Kerker condition and the generalized second Kerker condition. In the generalized first Kerker condition and the generalized second Kerker condition, light propagation in higher-order pole modes has better directionality, i.e., it produces forward-scattered or back-scattered beams. Furthermore, the directionality of light propagation in quadrupole mode is better than that in dipole mode. This better directionality can be understood as the main lobe of the scattered beam in quadrupole mode being narrower than that in dipole mode. Generally, the forward scattering angle range of higher-order pole modes is smaller than that of lower-order pole modes. For example, when the Kerker condition is satisfied, the forward scattering angle range of hexapole mode is smaller than that of quadrupole mode, and the forward scattering angle range of quadrupole mode is smaller than that of dipole mode. When multiple similar nanoantennas are arranged sequentially along the direction of light propagation, such as in a straight line, the angle of forward scattering of light can be further reduced.

[0106] From the Kerker condition in formula (1) above, it can be seen that the polarization direction under illumination by the light source and the polaron mode α of the nanoantenna itself are related. e and α m and the constitutive parameter ε of the material surrounding the nanoantenna s and μ s These factors together determine whether the Kerker condition holds. In other words, even if the polar mode of the nanoantenna itself remains unchanged, the Kerker condition can be affected by adjusting the constitutive parameters of the material surrounding the nanoantenna.

[0107] It should be understood that the above scheme only describes the different forward scattering angle ranges resulting from one type (quadrupole mode or hexapole mode). Furthermore, other situations may arise with nanoantennas, such as... Figure 2 As shown, there are combinations of electrodes of different orders, magnetic poles of different orders, or multiple electrodes of different orders and multiple magnetic poles of different orders existing simultaneously. These combinations can change the forward scattering angle range of the nanoantenna, forming different visible angle ranges.

[0108] In general, when the Kerker condition is not met, the nanoantenna can produce ordinary large-angle scattering; when the Kerker condition is met, the nanoantenna can produce forward small-angle scattering. When the Kerker condition is met, observers outside the small-angle scattering coverage area cannot receive light, or can only receive very weak light, and only observers within the small-angle scattering range can see the displayed image.

[0109] The application scenarios and system architecture of the technical solution in this application are described below.

[0110] This application can be applied to a display device that includes an electronic display screen. For example, Figure 3 As shown, the display device can be a terminal device. Further, the terminal device can be a smart terminal, mobile phone, laptop, tablet, personal computer (PC), personal digital assistant (PDA), foldable terminal, wearable device with wireless communication capabilities (e.g., smartwatch or bracelet), user device (UE), smart home device such as Vision, in-vehicle computer, game console, and augmented reality (AR) / virtual reality (VR) devices, etc. The embodiments of this application do not limit the specific device form of the terminal device. In addition, the various terminal devices mentioned above include, but are not limited to, those running Apple (iOS), Android, Microsoft, or other operating systems.

[0111] See Figure 4This application provides a schematic diagram of the structure of a display device. The display device 10 includes at least one controller 20, a circuit board 30, and a display unit 40. The controller 20 provides power to the circuit board 30, which is connected to the display unit 40. The display unit 40 includes at least one display unit, which may include a pixel light-emitting control circuit, a nano-antenna control circuit, light-emitting pixels, a nano-antenna structure, etc. A pixel array can be formed by multiple light-emitting pixels, nano-antenna structures, and control circuits. The circuit board 30 connects to at least one light-emitting pixel, nano-antenna structure, and control circuit, and controls these components via electrical signals.

[0112] The display device 40 has nanoantenna structures on at least some or all of its pixel units. These pixel units emit light of a specific color (i.e., a specific wavelength). Whether each pixel unit emits light and the intensity of that light emission are controlled by a pixel emission control circuit. The nanoantenna structure affects the scattering angle range of the light emitted from the pixel unit; for example, one type forms a wide scattering angle range, and another forms a narrow scattering angle range. The wide scattering angle range corresponds to the normal display mode of the display device, and the narrow scattering angle range corresponds to the privacy display mode of the display device.

[0113] This application primarily integrates a nano-antenna structure onto the light-emitting pixels of a display device, enabling the display device to display both a wide and narrow scattering viewing angle range. When the display device displays a narrow scattering viewing angle range, i.e., in anti-peeping display mode, it has an anti-peeping function. This display device is applicable to display devices including, but not limited to, light-emitting diodes (LEDs) and organic light-emitting diodes (OLEDs). Therefore, in the following embodiments, the polarization direction of the light source in the light-emitting pixels and the nano-antenna structure are mainly described.

[0114] This embodiment provides a display device, which can be the aforementioned... Figure 4 The display device 40 shown includes at least one display unit.

[0115] See Figure 5 This is a schematic diagram of the structure of a display unit provided in this embodiment. The display unit includes: a first control circuit 41, a second control circuit 42, a first light-emitting pixel 43, a polarization layer 44, and a nano-antenna structure 45.

[0116] In addition, the display unit may optionally include other structural components such as transparent media 47a and 47b, transparent electrodes 46a and 46b, and a reflective substrate 48.

[0117] One structural relationship is that the components are connected in the following order from bottom to top: reflective base plate 48, first control circuit 41, first light-emitting pixel 43, transparent electrode 46b, polarization layer 44, transparent electrode 46a, transparent medium 47b, nano-antenna structure 45, and transparent medium 47a.

[0118] Specifically, the first control circuit 41 is located between the reflective substrate 48 and the first light-emitting pixel 43. The first control circuit 41 is used to control the first light-emitting pixel 43 to emit a light beam, such as a first light beam, towards the polarization layer 44.

[0119] Optionally, the first control circuit 41 can be the aforementioned Figure 4 The pixel emission control circuit in the middle.

[0120] A polarization layer 44 covers the first light-emitting pixel 43, and a nano-antenna structure 45 covers the polarization layer 44.

[0121] The nanoantenna structure 45 may include at least one nanoantenna, and the structure of the at least one nanoantenna may be a geometric nanoantenna structure. For example Figure 6 As shown, the geometric nanoantenna structure can be any geometric structure. For example, it includes, but is not limited to, cubic nanoantennas, cylindrical nanoantennas, spherical nanoantennas, or combined nanoantennas formed by combinations of the above-mentioned nanoantennas.

[0122] Furthermore, the combined nanoantenna includes, but is not limited to, a combination of one or more cubic nanoantennas or cylindrical nanoantennas. One possible combined nanoantenna is as follows: Figure 6 As shown, the combined nanoantenna is composed of a cube and a cuboid.

[0123] Optionally, the nanoantenna structure 45 may further include tunable materials and / or transparent dielectrics. For example... Figure 7A As shown, the nanoantenna structure 45 includes a transparent medium 47c that covers at least one nanoantenna. Alternatively, as... Figure 7B As shown, the nanoantenna structure 45 also includes a tunable material, and the material characteristics of the tunable material, such as the constitutive parameters of the tunable material, are adjustable.

[0124] The polarization layer 44 is disposed on the light-emitting side of the first light-emitting pixel 43. The polarization layer 44 contains liquid crystal molecules and is used to control the polarization direction of the second light beam, so as to convert the first light beam into the second light beam and emit it.

[0125] The second control circuit 42 is connected to the polarization layer 44 or the nano-antenna structure 45, such as Figure 5 or Figure 8 As shown, the scattering angle of the third beam can be changed. The third beam is the output beam of the second beam after passing through the nano-antenna structure 45.

[0126] Specifically, when the second control circuit 42 is connected to the polarization layer 44 or the nanoantenna structure 45, it is used to switch the operating mode of the nanoantenna structure 45 between satisfying the Kerker condition and not satisfying the Kerker condition. When the operating mode of the nanoantenna structure 45 switches between satisfying the Kerker condition and not satisfying the Kerker condition, the scattering angle of the third beam changes.

[0127] First, an embodiment is introduced in which the second control circuit 42 is connected to the polarization layer 44 to control the nanoantenna structure 45 to switch between satisfying and not satisfying the Kerker condition.

[0128] One structural connection is that, under the condition that the nano-antenna structure 45 remains unchanged, the second control circuit 42 is connected to the polarization layer 44. The second control circuit 42 is used to apply voltage to the polarization layer 44 to change the polarization direction of the second beam, so that the scattering angle of the third beam emitted through the nano-antenna structure 45 is changed.

[0129] The conditions under which the nanoantenna structure 45 remains unchanged include: the polar mode of the nanoantenna itself and the material surrounding the nanoantenna are immutable, that is, the nanoantenna structure in the nanoantenna structure 45 is fixed, and the material properties of the material surrounding the nanoantenna remain unchanged.

[0130] like Figure 9 As shown, the first light-emitting pixel 43 emits light of a specific color (wavelength), such as a first beam, under the action of the first control circuit 41. This first beam is directed towards the polarization layer 44. The second control circuit 42 is connected to the polarization layer 44 through transparent electrodes 46a and 46b, and is used to apply a certain voltage to the polarization layer 44. Under the action of a certain voltage, the liquid crystal molecules in the polarization layer 44 change the long axis direction of the liquid crystal molecules, thereby controlling the polarization direction of the first beam emitted by the first light-emitting pixel 43, converting the first beam into a second beam, and then the second beam is emitted from the polarization layer 44 and illuminates the nanoantenna structure 45.

[0131] Because the polarization layer 44 contains liquid crystal molecules, the polarization direction of the second beam can be dynamically controlled. For example, the polarization direction of linearly polarized light can be changed, or the circularly polarized light can be changed between left-handed and right-handed polarization, thereby changing the scattering angle of the third beam, which is the output beam of the second beam after passing through the nano-antenna structure 45.

[0132] When the second control circuit 42 applies a first voltage to the polarization layer 44, the polarization direction of the second beam can be controlled to be parallel to the bottom side length of the geometric nanoantenna through the polarization layer 44, so that the working mode of the nanoantenna structure 45 satisfies the Kerker condition, thereby changing the scattering angle of the third beam and forming a narrow scattering angle range, which is the anti-peeping display mode.

[0133] Optionally, when the operating mode of the nano-antenna structure 45 satisfies the Kerker condition, the scattering angle of the third beam is a first angle; when the operating mode of the nano-antenna structure 45 does not satisfy the Kerker condition, the scattering angle of the third beam is a second angle. The first angle is different from the second angle, and the first angle is smaller than the second angle.

[0134] The first voltage is a preset voltage, which is a preset value or any value within a preset range. The first voltage can be applied or turned off by the second control circuit 42. This embodiment does not restrict the setting process of the first voltage.

[0135] In one example, when the geometric nanoantenna is a cubic nanoantenna, such as Figure 10A As shown, the bottom surface of the cubic nanoantenna is bounded by side lengths a and b, where a > b. Therefore, the polarization direction of the second beam is controlled to be parallel to side length a of the bottom surface of the cubic nanoantenna, i.e., polarized along the x-axis. The z-axis is perpendicular to the bottom surface and points upwards, while the y-axis is perpendicular to both the x-axis and z-axis and points inwards, conforming to the right-hand rule. In this embodiment, the y-axis is... Figure 10A The cubic nanoantenna structure shown is not illustrated.

[0136] Optionally, in another example, when the geometric nanoantenna is a composite nanoantenna, such as... Figure 10C As shown, the combined nanoantenna structure consists of a cube and a cuboid, with the cube structure positioned on the cuboid structure. The bottom surface of the combined nanoantenna is one side surface of the cuboid, with the longer side length of this side surface being L1. The second control circuit 42 controls the polarization direction of the second beam to make it parallel to the direction of the bottom side length L1. At this time, the operating mode of the nanoantenna structure 45 satisfies the Kerker condition, forming a narrow scattering range with a visible angle.

[0137] Optionally, in yet another example, when the geometric nanoantenna is a cylindrical nanoantenna, such as Figure 10EAs shown, the bottom surface of the cylindrical nanoantenna is elliptical. Assume the center of the ellipse is O1, the major axis is AB, and the minor axis is CD. The length of the major axis AB is L1, and AB is parallel to the x-axis. When the polarization direction of the second beam is controlled to be parallel to the major axis AB of the bottom surface of the cylindrical nanoantenna, the operating mode of the nanoantenna structure 45 satisfies the Kerker condition, forming a narrow scattering range with a visible angle.

[0138] Furthermore, when the second control circuit 42 stops applying the first voltage to the polarization layer 44, or when the applied voltage is greater than or less than the first voltage, the first beam becomes the second beam after polarization adjustment by the polarization layer 44. The second beam is directed toward the nano-antenna structure 45, and the third beam emitted after passing through the nano-antenna structure 45 does not satisfy the Kerker condition, thus forming a wide scattering angle range.

[0139] Specifically, in the example where the nanoantenna structure is a cubic nanoantenna, such as Figure 10B As shown, or in an example where the nanoantenna structure is a composite nanoantenna, such as Figure 10D As shown, when the polarization direction of the second beam controlled by the polarization layer 44 is not parallel to the bottom side length a, for example, the polarization direction is along the diagonal direction of the bottom side length a and side length b, the scattering angle of the third beam emitted after passing through the nano-antenna structure 45 diverges outward, which does not satisfy the Kerker condition, and a wide scattering range of visible angle is formed.

[0140] In this example, by applying a certain voltage to adjust the polarization direction of the light source, the polarization direction of the incident light (i.e., the second beam) is made parallel to the side length of the bottom surface of the cubic nanoantenna. This makes the length of light passing through the cubic nanoantenna equal to the side length of the bottom surface of the cubic nanoantenna. Combined with the structure of the nanoantenna, a polar mode that satisfies the Kerker condition can be excited, resulting in a narrow scattering range of visible angle.

[0141] Similarly, in the example where the nanoantenna structure is a cylindrical nanoantenna, such as Figure 10F As shown, when the polarization direction of the second beam controlled by the polarization layer 44 is not parallel to the major axis AB, for example, when the polarization direction is along the minor axis CD, or along other directions besides the major axis AB, the scattering angle of the third beam emitted after passing through the nano-antenna structure 45 diverges outward, which does not satisfy the Kerker condition.

[0142] It should be understood that the bottom surface of the aforementioned cubic nanoantenna or combined nanoantenna can be either rectangular or square; the bottom surface of the cylindrical nanoantenna can be either elliptical or circular, and this embodiment does not impose any restrictions on this.

[0143] In this embodiment, a second control circuit is connected to the polarization layer. When the second control circuit applies a certain voltage to the polarization layer, the first beam generated by the light-emitting pixel changes its polarization direction after passing through the polarization layer, emitting a second beam. The polarization direction of the second beam after passing through the nanoantenna structure is parallel to the side length of the bottom surface of the nanoantenna structure. At this time, the electric quadrupole mode and the magnetic quadrupole mode satisfying the Kerker condition are excited. The scattering angle of the emitted third beam is narrow, and the scattering direction is forward, realizing the anti-peeping display mode, such as... Figure 11A As shown, this effectively prevents people outside the narrow scattering angle range from peeping.

[0144] When the second control circuit does not apply a certain voltage to the polarization layer, or the applied voltage is not a preset voltage, the scattering angle of the third beam emitted after passing through the polarization layer and the nanoantenna structure diverges. At this time, the polarization direction of the incident light (i.e., the first beam) and the nanoantenna structure cannot excite a polaron mode that satisfies the Kerker condition. The scattering angle of the emitted light (i.e., the third beam) is wide, and the scattering direction is forward. Figure 11B As shown, the normal display mode can be achieved.

[0145] Optionally, in another embodiment, the polarization direction of the first beam remains unchanged while the incident light is kept constant. The scattering angle of the third beam emitted from the nanoantenna structure is changed by adjusting the nanoantenna structure, thereby switching the operating mode of the nanoantenna structure between satisfying and not satisfying the Kerker condition.

[0146] Specifically, structural connections, such as Figure 8 As shown, the second control circuit 42 is connected to the nano-antenna structure 45 and is used to change the scattering angle of the third beam.

[0147] The nano-antenna structure 45 includes a tunable material whose properties can be changed. When the second control circuit 42 controls the properties of the tunable material to change, the scattering angle of the third beam also changes accordingly.

[0148] See Figure 12A The image shown is a cross-sectional view of a nanoantenna structure containing tunable materials. The nanoantenna consists of two parts: one part is the nanoantenna containing tunable materials, such as... Figure 12A The gray area in the image; the other part consists only of nano-antennas, such as... Figure 12A The white area is shown in the image. Within the gray area, both the nanoantenna and the tunable material are contained. Furthermore, the tunable material is also referred to as the material surrounding the nanoantenna.

[0149] Furthermore, the two components of the aforementioned nanoantenna, the gray and white regions, can also be other structures. For example... Figure 12BAs shown, nanoantennas containing tunable materials (gray area) and nanoantennas (white area) are arranged side by side. Alternatively, as... Figure 12C As shown, a nanoantenna containing tunable material (gray area) surrounds a nanoantenna (white area), wherein both the nanoantenna and the nanoantenna containing tunable material are spherical or cylindrical structures. This embodiment does not limit the structural and connection relationships between the two components of the nanoantenna.

[0150] Among the two components of the nanoantenna, the structure of the nanoantenna can be any of the geometric nanoantennas in the aforementioned embodiments, such as a cubic nanoantenna, a cylindrical nanoantenna, or a combined nanoantenna.

[0151] Optionally, the nanoantenna structure 45 further includes a transparent dielectric 47c, which is located between the transparent electrodes 46a and 46b, such as... Figure 13 As shown, it is used to fix the nanoantenna structure.

[0152] In the foregoing Figures 12A to 12C In any of the nanoantenna structures 45, the constitutive parameters of the tunable material in the nanoantenna containing the tunable material are adjustable. The constitutive parameter is a variable parameter in the tunable material used to describe its properties. When the second control circuit 42 applies a voltage to the tunable material, it can change the constitutive parameters of the tunable material, thereby changing the state of the tunable material.

[0153] The constitutive parameters include dielectric constant, magnetic permeability, and electrical conductivity. The tunable material includes, but is not limited to, germanium-antimony-tellurium, vanadium oxide, and may also be antimony telluride, bismuth ferrite, etc.

[0154] For example, when the adjustable material is germanium-antimony-tellurium material, it is a sulfide ternary alloy. The three most commonly used stoichiometric ratios of this ternary alloy are Ge1Sb4Te7, Ge1Sb2Te4, and Ge2Sb2Te5. Under a certain voltage control, the germanium-antimony-tellurium material can switch between crystalline and amorphous states. Specifically, under the voltage applied by the second control circuit, changing the ratio of antimony metal content to germanium metal content increases the crystallization rate and decreases the crystallization temperature; while increasing the germanium content increases the crystallization time and raises the crystallization temperature.

[0155] When germanium-antimony-tellurium materials change between crystalline and amorphous states, their dielectric constant undergoes a significant change, thereby affecting the α-coefficient in the nanoantenna structure. e and α m Changes. Wherein, α e α represents the scalar polarization of the nanoantenna itself, representing its electrical recombination. m α represents the magnetic recombination scalar polarizability. e and αm The corresponding polarization modes are the electrode mode and the magnetic pole mode, respectively. When designing nanoantennas, the Kerker condition can be satisfied by designing nanoantenna structures containing tunable materials based on the dielectric constant of the crystalline state, thus forming a visible angle with a narrow scattering range.

[0156] When the voltage applied to the germanium-antimony-tellurium material by the second control circuit changes the dielectric constant, causing the germanium-antimony-tellurium material to change from a crystalline state to an amorphous state, it cannot excite the polar mode that satisfies the Kerker condition, thus forming a normal wide scattering range of visible angle.

[0157] For example, when the tunable material is vanadium oxide, the second control circuit 42 applies a voltage to the vanadium oxide material, which can change the conductivity of the vanadium oxide material, causing the state of the vanadium oxide phase change material to switch between a dielectric state and a metallic state. When the vanadium oxide material is in a dielectric state, it can excite a polar mode that satisfies the Kerker condition, changing the scattering angle of the third beam and emitting a forward beam with a narrow scattering angle. When the vanadium oxide material changes from a dielectric state to a metallic state, it changes the scattering angle of the third beam, emitting a beam with a wide scattering angle, at which point the Kerker condition is not satisfied.

[0158] For example, when the adjustable material contains both germanium-antimony-tellurium material and vanadium oxide material, the second control circuit 42 applies a control to the adjustable material, simultaneously changing the dielectric constant in the germanium-antimony-tellurium material and the conductivity in the vanadium oxide material, so that the germanium-antimony-tellurium material is in a crystalline state and the vanadium oxide material is in a dielectric state.

[0159] In another possible implementation, the tunable material is a liquid crystal material. For example... Figure 12D As shown, the liquid crystal material comprises liquid crystal molecules. For ease of description, this embodiment assumes that the structure of the liquid crystal molecules is an ellipsoid or ellipsoidal shape, and that the liquid crystal molecules are filled in a transparent medium 47c, meaning that the transparent medium 47c contains liquid crystal material. The long axis direction of at least some or all of the liquid crystal molecules can be adjusted by the voltage applied by the control circuit. In this case, the nanoantenna is a pure dielectric and does not contain any tunable material.

[0160] In another possible implementation, the tunable material includes both liquid crystal materials and materials such as germanium-antimony-tellurium and vanadium oxide, for example... Figure 12E As shown. Figure 12A and Figure 12D Combining these two properties yields a tunable material containing two adjustable characteristics. One is adjustable... Figure 12E The constitutive parameters of the adjustable material in the gray area are one type; another type is adjustable. Figure 12EThe long axis direction of the liquid crystal molecules allows these two parts to be adjusted under a certain voltage to excite the polar mode of the nanoantenna structure that satisfies the Kerker condition.

[0161] The following describes the switching process between satisfying and not satisfying the Kerker condition when the various nanoantenna structures containing tunable materials are excited under a certain voltage.

[0162] like Figure 13 As shown, this includes the aforementioned Figure 12A A schematic diagram of a display device showing a nanoantenna structure made of tunable material. The second control circuit 42 is connected to the nanoantenna structure 45 via transparent electrodes 46a and 46b.

[0163] The first light-emitting pixel 43 emits a first beam of light towards the polarization layer 44 under the action of the first control circuit 41. After passing through the polarization layer 44, the first beam of light becomes a second beam of light. The polarization direction of the first beam of light does not change during the process of passing through the polarization layer 44. When the second beam of light is directed toward the nanoantenna structure 45, it passes through the nanoantenna (white area) and the nanoantenna containing tunable material (gray area) in sequence. The second control circuit 42 applies a certain voltage to the nanoantenna structure 45 to adjust the constitutive parameters in the tunable material, such as changing the dielectric constant in the germanium-antimony-tellurium material, so that the tunable material changes from an amorphous state to a crystalline state. When the germanium-antimony-tellurium material has a specific dielectric constant, it can excite the working mode of the nanoantenna structure 45 to satisfy the Kerker condition and emit a third beam of light outward. The scattering angle of the third beam of light is within a narrow angle range and the scattering direction is forward.

[0164] When the second control circuit 42 changes the dielectric constant of the germanium-antimony-tellurium material, causing the germanium-antimony-tellurium material to change from a crystalline state to an amorphous state, the third beam emitted after the second beam passes through the nano-antenna structure 45 does not satisfy the Kerker condition at this time. The scattering angle of the third beam is a wide range, and the scattering direction is forward.

[0165] Similarly, for Figure 12B or Figure 12C In the nanoantenna structure shown, the second control circuit 42 applies a voltage to the nanoantenna structure 45 to change the constitutive parameters of the tunable material in the nanoantenna structure 45, thereby changing the scattering angle of the third beam and generating a forward beam with a narrow scattering angle. The specific process is the same as described above. Figure 13 The embodiments shown are the same, and will not be described again here.

[0166] In this embodiment, the nanoantenna structure is configured to contain a portion of metal, i.e., the tunable material is germanium-antimony-tellurium material or vanadium oxide material, thereby tunably adjusting the constitutive parameters of the material surrounding the nanoantenna to achieve the beneficial effect of changing the scattering angle of the third beam.

[0167] Furthermore, in this embodiment, the polarization direction of the light beam in the polarization layer is kept unchanged, and a nano-antenna structure containing tunable material is set. A certain voltage is applied by the control circuit to change the constitutive parameters in the nanomaterial, thereby changing the state of the tunable material, such as from amorphous to crystalline, or from metallic to dielectric. This makes the outgoing light beam (i.e., the third light beam) after passing through the nano-antenna structure form a forward light beam with a narrow scattering angle, thus achieving privacy display.

[0168] In another implementation, such as Figure 14 As shown, the nano-antenna structure 45 is as follows Figure 12D The structure shown indicates that the adjustable material is a liquid crystal material, which comprises liquid crystal molecules that fill the transparent medium 47c. The specific adjustment process includes:

[0169] When the first beam passes through the polarization layer 44, a second beam is generated. The polarization direction of the second beam in the polarization layer 44 remains unchanged. When the second beam is directed toward the nanoantenna structure 45, the second control circuit 42 applies a certain voltage to the nanoantenna structure 45 through the transparent electrodes 46a and 46b. Under the action of the voltage, the long axis direction of the liquid crystal molecules in the nanoantenna structure 45 will change. Figure 15A As shown, before the second control circuit 42 applies voltage, the long axis direction of the liquid crystal molecules in the liquid crystal material is freely distributed, for example, the long axis direction is perpendicular to the bottom surface of the nanoantenna. The bottom surface of the nanoantenna is parallel to the transparent electrode 46b, and the bottom surface of the nanoantenna is... Figure 15A As not shown in the diagram, at this time, the scattering angle of the third beam emitted after the second beam passes through the nano-antenna structure 45 is relatively large.

[0170] When the second control circuit 42 applies a certain voltage, the long axis direction of the liquid crystal molecules in the liquid crystal material changes, shifting to a direction parallel to the bottom surface of the nanoantenna, such as... Figure 15B As shown, when the applied voltage reaches a preset value, the long axis direction of most or all liquid crystal molecules is instantaneously parallel to the bottom surface of the nanoantenna. At this time, the second beam passing through the nanoantenna structure 45 is changed, and a third beam is emitted outward. The third beam forms a forward beam with a narrow scattering angle, and the working mode of the nanoantenna structure satisfies the Kerker condition.

[0171] It should be understood that Figure 15BThe example only illustrates that when a single beam of light passes through the polarization layer 44 and is directed toward the nanoantenna structure 45, the long axis direction of the liquid crystal molecules can also include two or more beams of light. After passing through the nanoantenna structure 45, the long axis direction of the liquid crystal molecules is also parallel to the bottom surface of the nanoantenna.

[0172] In this embodiment, the nanoantenna structure includes liquid crystal material, so that when a certain voltage is applied, the liquid crystal molecules in the liquid crystal material can change the direction of their long axis, making most or all of their long axis parallel to the bottom surface of the nanoantenna. This can excite the nanoantenna structure to satisfy the Kerker condition in the polar mode, making the outward emitted third beam a forward beam with a narrow scattering angle, thereby achieving the anti-peeping effect.

[0173] In another implementation, such as Figure 16 As shown, the nano-antenna structure 45 can also be as follows: Figure 12E The structure shown, namely the nanoantenna structure 45, contains both liquid crystal materials and materials such as germanium, antimony, tellurium, and vanadium oxide.

[0174] exist Figure 16 In the nanoantenna structure shown, by adjusting the matching degree of the two tunable materials, the pole mode of the nanoantenna structure satisfies the Kerker condition, thereby achieving the switching between the normal display mode and the anti-peeping display mode. The propagation direction of the light beam in the nanoantenna structure 45 is similar to that described above. Figure 13 and Figure 14 As shown.

[0175] Specifically, the second control circuit 42 applies a certain voltage to the nanoantenna structure 45 through transparent electrodes 46a and 46b. Under the action of this voltage, on the one hand, it changes the constitutive parameters of the germanium-antimony-tellurium material or vanadium oxide material in the nanoantenna (gray area) containing the tunable material, such as dielectric constant and conductivity, so that the tunable material is in a crystalline or dielectric state; on the other hand, it changes the long axis direction of the liquid crystal molecules in the transparent medium 47c, so that the long axis direction of most or all liquid crystal molecules is parallel to the bottom surface direction of the nanoantenna, satisfying the Kerker condition, thereby making the scattering angle of the third beam narrow and the scattering direction forward. For the specific adjustment process, please refer to the foregoing. Figure 13 and Figure 14 The explanation will not be repeated here.

[0176] In this embodiment, the nanoantenna structure includes two adjustable materials: a metallic adjustable material, such as germanium-antimony-tellurium or vanadium oxide, and a liquid crystal material. This allows for adjustment from multiple angles, further enhancing design flexibility and enabling better matching of real-world applications.

[0177] In addition, this embodiment provides a method for joint adjustment of multiple pixel arrays in different anti-peeping display screens, which can be applied to any of the aforementioned display devices.

[0178] The nanoantenna structure in the display device has the characteristic of light wave modulation. One of its main characteristics is that it can concentrate electromagnetic wave energy to radiate in a specific direction, which can be understood as directionality. The foregoing embodiments illustrate that when a light beam emitted from a single light-emitting pixel (such as the first light-emitting pixel 43) passes through a polarization layer or nanoantenna structure, the polarization direction of the incident light or the material properties in the nanoantenna structure change, thereby altering the scattering angle range of the emitted third light beam. This allows the operating mode of the nanoantenna structure to switch between satisfying and not satisfying the Kerker condition.

[0179] In theory, when there are multiple light-emitting pixels and multiple nano-antenna structures, by applying voltage through the control circuit, multiple directions of emitted light beams can be adjusted and obtained to form different scattering ranges. Based on the aforementioned display device embodiments, this embodiment describes the case where multiple light-emitting pixels are jointly adjustable, enabling the display device to achieve multiple anti-peeping angle adjustment schemes.

[0180] Referring to the above Figure 4 The display device structure is described in this embodiment. The main function of the controller 20 is introduced. The anti-peeping display function of the display device can be realized in different scenarios through the adjustment function of the controller 20.

[0181] In an indoor application scenario, such as Figure 17 As shown, this scene includes a display device, which is as follows: Figure 4 The device shown includes a controller 20 and a display device 40. The controller 20 is connected to the display 40 via a circuit board 30. The display device 40 is the display device described in any of the foregoing embodiments.

[0182] Additionally, this scenario also includes users viewing the display device. In this embodiment, it is assumed that there are three users viewing the display device: users A, B, and C. The target user is the user the display device actually needs to show, while the other users (excluding the target user) are those whose privacy needs to be protected. In this example, user B is assumed to be the target user, and users A and C are the users whose privacy needs to be protected.

[0183] To achieve anti-peeping display for users other than the target user, this embodiment provides a method for adjusting the display device, such as... Figure 18 As shown, the method includes:

[0184] 101: Obtain a first instruction from the first target user, the first instruction being used to instruct the display device to activate the anti-peeping display mode.

[0185] The first instruction can be manually triggered by the first target user, or it can be configured by default as an anti-spy display mode when the display device is started. For example, one way is for user B to trigger the first instruction via a remote control, touch screen, or keyboard shortcut. Alternatively, another way is for the first instruction to be triggered by activating the default configuration function when the camera locates the first target user. After receiving the first instruction, the controller of the display device activates the anti-spy display mode of the display device.

[0186] Optionally, the triggering method can be implemented by displaying the user interface (UI) of the device, issuing voice commands, etc., and this embodiment does not limit this.

[0187] 102: Send a second instruction to the display device, the second instruction instructing the second control circuit of the display device to apply a voltage to the polarization layer or nanoantenna structure, thereby changing the viewing angle of the display device to a first viewing angle.

[0188] The first viewing angle is the narrow scattering angle formed when the nano-antenna structure of the display device operates under the Kerker condition, and the scattering direction is the forward beam.

[0189] The first viewing angle is determined based on the location of the first target user. Specifically, one implementation is that when the controller receives a first command sent by the first target user via a remote control, it determines the location of the first target user based on the location of the remote control. Assuming that the location of the first target user (user B) is the same as the location of the remote control, the controller can obtain the location of user B by locating the location of the remote control.

[0190] In this embodiment, assuming that the location where user B triggers the first instruction is the first position, the first viewing angle is determined based on the first position.

[0191] Optionally, the display device can also use a camera in conjunction with facial recognition technology to determine the first location. For example, the camera can be used to acquire the facial features of users A, B, and C respectively, and facial recognition can be performed based on the facial features of each user to determine the identity of each user, the location of each user, the location of the target user, the location of the user to be prevented from being spied on, and the relative position between the target user and the user to be prevented from being spied on.

[0192] Optionally, if no object that needs to be prevented from being spied on is detected near the first target user B, such as only user B and no users A and C, the display device can select the default viewing angle range.

[0193] Before step 102, the first viewing angle is determined based on the first position, including: obtaining the line connecting the optical axis center of the display device and the first position of the first target user, and taking the field of view angle formed within a range of ±15° with the line as the center line as the first viewing angle, and then the first viewing angle is a 30° viewing range.

[0194] The 15° angle range can also be other angles, such as 30° or a range of 15° to 30°. This embodiment does not limit this.

[0195] It should be noted that the range of the first viewing angle must not exceed the display range of the narrow scattering angle formed by the working mode of the nanoantenna structure under the Kerker condition.

[0196] Step 102 specifically includes: the controller generates a second instruction and sends the second instruction to the display device, so that the display device adjusts the display range of at least one of the display units according to the second instruction, so that the scattering direction of the third beam emitted after the first light beam generated by the light-emitting pixel passes through the polarization layer and the nano-antenna structure is forward and the scattering angle is narrow, satisfying the Kerker condition and forming a first viewing angle, so that only the target user B located within the first viewing angle range can see the display screen of the display device, while users A and C located outside the first viewing angle cannot see the display screen, thereby achieving the beneficial effect of preventing peeping.

[0197] Furthermore, the process by which the controller controls the control circuit in the display device can be referred to the aforementioned embodiment of the display device. In this embodiment, the process by which the controller adjusts the emission angle of the light beam in the display device will not be described in detail.

[0198] This method provides a technical solution for preventing peeping to target users in indoor scenarios, which improves the security of target users when viewing the display screen, and also increases the flexibility of solution design.

[0199] Furthermore, the method in this embodiment can also track the location of the target user and adjust the viewing angle of the display device according to changes in the target user's location.

[0200] For example Figure 19 , Figure 20A and Figure 20B As shown, when the first target user B moves from the first location to the second location, the method further includes:

[0201] 103: Obtain the second location of the first target user, where the second location is different from the first location.

[0202] The second location is obtained in the same way as the first location, or the second location can be obtained by tracking and locating the first target user using a camera or other sensors.

[0203] Alternatively, it can be obtained based on signals sent by the target user at the second location. For example, when user B is at the second location, he / she sends a signal or instruction to the display device via a remote control, which is used to instruct user B to activate the anti-peeping display mode.

[0204] 104: Send a third instruction to the display device, the third instruction instructing the viewing angle of the display device to be changed from the first viewing angle to the second viewing angle. The second viewing angle is determined based on the second position of the first target user.

[0205] Specifically, the third instruction is generated by the controller and sent to the display device. The display device controls the second control circuit to apply voltage to the polarization layer or nano-antenna structure according to the third instruction, thereby changing the viewing angle from the first viewing angle to the second viewing angle.

[0206] Furthermore, the second viewing angle is a narrow angle within which the scattering angle of the light beam emitted from the display device is narrow, and the scattering direction is biased towards the second position. For example... Figure 20B As shown, the beam of light emitted by the display device is scattered to the right, toward the second position where user B is located, so that user B can see the display screen on the display device.

[0207] Specifically, the process of determining the second viewing angle is the same as the process of determining the first viewing angle. For example, the second viewing angle is the field of view formed within a range of ±15° with the second position where user B is located and the optical axis center of the display device as the center line.

[0208] This method enables flexible adjustment of the viewing angle of display devices based on nano-antenna structures, thereby improving the user experience.

[0209] Optionally, the above-mentioned display device can also be applied to other application scenarios, such as Figure 21 As shown, the display device includes a large-screen display device, which includes at least one display unit, and different images can be displayed on different display units, so as to meet the viewing needs of two or more target users at the same time, and the content viewed by different target users does not affect each other.

[0210] Among these, the display device including the large screen can be a terminal device, such as an in-vehicle terminal, etc. Figure 21 As shown, the large-screen display device is a tablet computer, in-vehicle display screen, etc., used to provide different video feeds for the driver and the passenger, and the content viewed by the driver and the passenger does not affect each other, that is, mutual anti-peeping display.

[0211] It should be understood that the large-screen display device proposed in this embodiment can also be a small-screen device, such as a mobile phone.

[0212] Among them, such as Figure 22 As shown, the display device includes two or more display units, and the structure of each display unit is as described above. Figure 5 , Figure 8 , Figure 9 , Figure 13 , Figure 14 and Figure 16 Any of the structures in them is the same. See also Figure 22 For example, consider a display device comprising two display units. The two display units are a first display unit and a second display unit, and the first display unit and the second display unit are different.

[0213] The first display unit includes a light-emitting pixel 1, a control circuit, a nano-antenna 1, and a nano-antenna 2, etc., while the second display unit includes a light-emitting pixel 2, a control circuit, a nano-antenna 6, and a nano-antenna 7, etc. Light-emitting pixel 1 and light-emitting pixel 2 are two different light-emitting pixel units that can emit different light beams, and the phase adjustment range of both light-emitting pixel 1 and light-emitting pixel 2 is 0° to 360°.

[0214] Specifically, as the phase of light-emitting pixel 1 can be adjusted from 0° to 360°, the phase of light-emitting pixel 2 needs to be adjusted from 360° to 0° to match the phases of the two light-emitting pixels. Other more specific antenna structures are the same as those in the aforementioned display device embodiments, and will not be described again here.

[0215] Assuming that in steps 101 to 102 above, the display unit at the first viewing angle is the first display unit, then as follows Figure 23 As shown, step 102 above, changing the viewing angle of the display device to the first viewing angle, includes:

[0216] 1021: The viewing angle of the first display unit of the display device is changed to the first viewing angle. And, the viewing angle of the second display unit of the display device is changed to the third viewing angle. The first viewing angle is determined based on the position of the first target user, and the third viewing angle is determined based on the position of the second target user.

[0217] For example, the first target user is the main driver, and the second target user is the passenger. The content displayed at the first viewing angle is presented from the main driver's perspective, while the content displayed at the third viewing angle is presented from the passenger's perspective. For instance, if the main driver needs to view navigation and maps, while the passenger needs to watch a movie or browse the web, the first display unit displays navigation and maps, and the second display unit displays the movie or webpage. By applying different voltages to the first and second display units through a control circuit, the light beams in the two display units, under the influence of the tunable material properties in the polarization layer and nanoantenna structure, generate different viewing angle ranges. This satisfies the need for different users to share a single display device while displaying different content, and simultaneously achieves privacy protection between users. The displayed content is isolated from each other; that is, the main driver can only view the content displayed at the first viewing angle and cannot view the content displayed at the third viewing angle; similarly, the passenger can only view the content displayed at the third viewing angle and cannot view the content displayed at the first viewing angle.

[0218] In addition, choosing a large-screen display device can present users with clearer picture quality and improve display clarity because the number of pixels on a large screen is greater.

[0219] Specifically, the process by which the second display unit acquires and presents the third viewing angle is the same as step 102 described above, as can be found in the description in the aforementioned embodiments, and will not be repeated in detail here.

[0220] Optionally, in step 101 above, the first instruction may also include user information that needs to be displayed to prevent peeping, such as the number of users to be displayed to prevent peeping and the location of the display.

[0221] The number of people and / or their positions displayed to prevent peeping can be set by the target user or based on the default configuration of the controller for the current scenario. For example, in the automotive and autonomous driving fields, the default position is the driver's seat (…). Figure 21 Position 1 shown) and the front passenger position ( Figure 21 Position 2) shown is the visible display position. Other positions, such as the rear seats, are for privacy screens, and other personnel besides the driver and front passenger are for privacy screens.

[0222] This embodiment provides a method for adjusting a display device, which can achieve a narrow range of viewing angles based on the same display unit, thereby achieving a display effect that prevents peeping at the target user.

[0223] At the same time, when the target user's position changes, the device can track the target user's position and adaptively adjust the viewing angle of the display device according to the target user's movement, thereby achieving the beneficial effect of the display screen adjusting with the target user's position and improving the user experience.

[0224] In addition, this method can also adjust different display units of the display device to display different images, supporting the needs of multiple users to view different images on the same display screen. Furthermore, different display units display different viewing angles when subjected to different voltages, thereby achieving the beneficial effect of preventing interference between the content viewed by multiple users and preventing each other from being spied on.

[0225] The following describes apparatus embodiments corresponding to the method embodiments described above in this application.

[0226] Figure 24 This is a schematic diagram of a controller provided in an embodiment of this application. The controller is used to implement the adjustment method of the display device in the foregoing embodiments, wherein the controller may include: an acquisition unit 210, a processing unit 220, a sending unit 230, and a display unit 240.

[0227] In addition, the controller may include more or fewer units and modules such as a storage unit; this embodiment does not limit the structure of the device.

[0228] The acquisition unit 210 is used to receive a first instruction from a first target user, which instructs the display device to activate an anti-peeping display mode; the processing unit 220 is used to generate a second instruction based on the first instruction, which instructs the second control circuit of the display device to apply a voltage to the polarization layer or nanoantenna structure; and the sending unit 230 is used to send the second instruction to the display device, causing the second control circuit of the display device to apply a voltage to the polarization layer or nanoantenna structure, thereby changing the viewing angle of the display device to the first viewing angle.

[0229] The first viewing angle is the narrow scattering angle formed by the working mode of the nano-antenna structure of the display device under the Kerker condition, and the scattering direction is the forward direction of the light beam.

[0230] The display unit 240 is used to present the display screen to the first target user according to the first viewing angle range.

[0231] Optionally, in some embodiments, the location of the first target user is a first location, and the first viewing angle is determined based on the first location of the first target user.

[0232] The processing unit 220 is further configured to acquire the second position of the first target user and generate a third instruction; the sending unit 230 is further configured to send the third instruction to the display device, the third instruction instructing the viewing angle of the display device to be changed from the first viewing angle to the second viewing angle; the second viewing angle is determined based on the second position of the first target user, the second position is different from the first position, the scattering angle of the light beam at the second viewing angle is a narrow angle, and the scattering direction is towards the second position.

[0233] The display unit 240 is also used to present the display screen to the first target user at the second viewing angle.

[0234] Optionally, in other embodiments, the display device includes a first display unit and a second display unit, and the processing unit 220 is further configured to change the viewing angle of the first display unit of the display device to the first viewing angle; and change the viewing angle of the second display unit of the display device to the third viewing angle.

[0235] The first viewing angle is determined based on the position of the first target user, and the third viewing angle is determined based on the position of the second target user. The first target user can be the primary driver in the vehicle, and the second target user can be the front passenger.

[0236] The display unit 240 is further configured to present a first display image to a first target user within the first viewing angle range, and to present a second display image to a second target user within the third viewing angle range. The first display image corresponds to the content displayed by the first display unit, and the second display image corresponds to the content displayed by the second display unit.

[0237] In the hardware implementation, embodiments of this application also provide a display device. The structure of this display device can be similar to the aforementioned... Figure 4 The display device 10 shown has the same structure. For example, Figure 4 As shown, the display device 10 includes at least one controller 20, a circuit board 30, and a display device 40.

[0238] The controller 20 is connected to the display device 40 via a circuit board 30. The display device 40 includes at least one display unit, which is the display unit described in any of the foregoing embodiments.

[0239] The at least one controller 20 is used to control the display device to change the scattering direction of the third beam, execute the adjustment method of the display device in the foregoing embodiment, and realize the switching of the viewing angle of the display device from the first viewing angle to the third viewing angle range.

[0240] In addition, the at least one controller 20 may also include a memory for storing computer program instructions, which, when invoked by the controller, can execute the adjustment method of the display device in the foregoing embodiments.

[0241] Optionally, the above-mentioned display device can be a terminal device. When the display device is a terminal device, its structure is described below. Figure 25 As shown, it includes at least one processor 110, memory 120, universal serial bus (USB) interface 130, communication module 140, at least one display screen 150, at least one camera 160, audio module 170, sensor module 180, buttons 190, and power management module 200, etc.

[0242] At least one processor 110 may include one or more processing units, such as an application processor (AP), a modem processor, a digital signal processor (DSP), a baseband processor, and / or a neural network processing unit (NPU). These different processing units may be independent devices or integrated into one or more processors, such as within a system-on-a-chip (SoC).

[0243] In some embodiments, processor 110 may include one or more interfaces. Interfaces may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a subscriber identity module (SIM) interface, and / or a USB interface 130, etc.

[0244] The at least one processor 110 may be as described above. Figure 4 At least one controller 20 is shown.

[0245] The memory 120 can be used to store executable program code, including instructions. The memory 120 may include a program storage area and a data storage area. The program storage area may store the operating system, applications required for at least one function, etc. The data storage area may store data created during the use of the terminal device. Furthermore, the memory 120 may include one or more storage units, such as volatile memory (e.g., dynamic access memory, RAM), and non-volatile memory (e.g., read-only memory, ROM), flash memory, etc. The at least one processor 110 executes various functional applications and methods of the terminal device by running program instructions stored in the memory 120 and / or program instructions stored in memory disposed within the processor.

[0246] The communication module 140 includes components or modules such as a mobile communication module, a wireless communication module, a radio frequency circuit, antenna 1 and antenna 2, and is used to realize communication transmission between the terminal device and external devices, such as receiving the first instruction.

[0247] Furthermore, the mobile communication module can provide solutions for wireless communication applications including 2G / 3G / 4G / 5G. The mobile communication module may include at least one filter, switch, power amplifier, low-noise amplifier (LNA), etc. In some embodiments, at least some functional modules of the mobile communication module may be housed in the processor 110. In other embodiments, at least some functional modules of the mobile communication module and at least some modules of the processor 110 may be housed in the same device.

[0248] The wireless communication module may include a wireless fidelity (WiFi) module, a Bluetooth (BT) module, a GNSS module, a near-field communication (NFC) module, an infrared (IR) module, etc. The wireless communication module may be one or more devices integrating at least one of the above modules. The wireless communication module receives electromagnetic waves via antenna 1 or antenna 2, performs frequency modulation and filtering of the electromagnetic wave signal, and sends the processed signal to processor 110. The wireless communication module can also receive signals to be transmitted from processor 110, perform frequency modulation and amplification on them, and convert them into electromagnetic waves for radiation via antenna 1 or antenna 2.

[0249] In addition, the wireless communication functions of the terminal device include, but are not limited to: Global System for Mobile Communications (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Time-Division Code Division Multiple Access (TD-SCDMA), Long Term Evolution (LTE), 5th Generation Mobile Networks New Radio (5G NR), BT, GNSS, WLAN, NFC, FM, and / or IR. GNSS may include Global Positioning System (GPS), Global Navigation Satellite System (GLONASS), BeiDou Navigation Satellite System (BDS), Quasi-Zenith Satellite System (QZSS), and / or Satellite Based Augmentation Systems (SBAS).

[0250] The display screen 150 is used to display at least one viewing angle. The display screen 150 can be a display device or monitor as described in the foregoing embodiments. The display device or monitor can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a MiniLED, a MicroLED, a Micro-OLED, a quantum dot light-emitting diode (QLED), etc. In some embodiments, the terminal device may include one or N displays, where N > 1 and is a positive integer.

[0251] Camera 160 is used to capture images of the user, such as facial features. Camera 160 includes a lens and a photosensitive element; an object is projected onto the photosensitive element through the lens to generate an optical image. The photosensitive element can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor. In some embodiments, the terminal device may include one or N cameras, where N > 1 and is a positive integer.

[0252] NPU stands for Neural Network (NN) Computing Processor. By borrowing the structure of biological neural networks, such as the transmission patterns between neurons in the human brain, it can rapidly process input information. NPUs enable intelligent cognitive applications in terminal devices, such as image recognition, facial recognition, and speech recognition.

[0253] The audio module 170 is coupled to the processor 110, enabling communication between the processor 110 and the audio module 170. In some embodiments, the audio module 170 can transmit audio signals to the communication module 140 via an I2S interface, enabling the function of answering phone calls through a Bluetooth headset. Alternatively, the audio module 170 and the communication module 140 can be coupled via a PCM bus interface. In some embodiments, the audio module 170 can also transmit audio signals to the communication module 140 via a PCM interface, enabling the function of answering phone calls through a Bluetooth headset. Both the I2S interface and the PCM interface can be used for audio communication.

[0254] The sensor module 180 includes a touch sensor 1801 and a pressure sensor 1802. The touch sensor 1801, also known as a "touch device," can be located on the display screen 150. The touch sensor 1801 and the display screen 150 together form a touchscreen, also known as a "touchscreen." The touch sensor 1801 detects touch operations applied to or near it. The touch sensor transmits the detected touch operation to a processor to determine the type of touch event. Visual output related to the touch operation can be provided through the display screen 150. In some embodiments, the touch sensor 1801 may also be located on the surface of the terminal device, in a different position than the display screen 150. The pressure sensor 1802 measures the pressure value applied by the user touching the screen. Additionally, other sensors may be included, such as a gyroscope sensor, an accelerometer, and a temperature sensor.

[0255] Button 190 includes a power button, volume buttons, etc. Button 190 can be a mechanical button or a touch button. The terminal device can receive button input and generate signal inputs related to user settings and function control of the terminal device. For example, the target user inputs a first command through button 190.

[0256] The power management module 200 is used to connect a battery and at least one processor 110. The power management module 200 receives power from the battery and supplies power to at least one processor 110, memory 120, communication module 140, display screen 150, camera 160, etc. In some other embodiments, the power management module 200 may also be located within the processor 110.

[0257] It is understood that the structures illustrated in the embodiments of this application do not constitute a specific limitation on the terminal device. In other embodiments of this application, the terminal device may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0258] When implemented using software, it can be implemented entirely or partially as a computer program product. For example, in the aforementioned... Figure 24 In the device shown, the acquisition unit 210 can be implemented by the communication module 140 and the antenna, the functions of the processing unit 220 and the transmission unit 230 can be implemented by at least one processor 110, the display unit 240 can be implemented by at least one processor 110 and the display screen 150, and the function of the storage unit can be implemented by the memory 120.

[0259] This application also provides a computer program product, which includes one or more computer program instructions. The computer program product can be stored in a memory, and when a computer loads and executes the computer program instructions, it generates, in whole or in part, the program according to the above description. Figure 18 Figure 20 and Figure 23 The process or function described herein. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.

[0260] The computer program instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one network node, computer, server, or data center to another node via wired or wireless means.

[0261] Furthermore, in the description of this application, unless otherwise stated, "at least one" means one or more. Additionally, to facilitate a clear description of the technical solutions of the embodiments of this application, the terms "first," "second," and "third," etc., are used in the embodiments of this application to distinguish identical or similar items with substantially the same function and effect. Those skilled in the art will understand that the terms "first," "second," and "third," etc., do not limit the quantity or execution order.

[0262] The embodiments described above do not constitute a limitation on the scope of protection of this application.

Claims

1. A display device, characterized in that, The display device includes at least one display unit, and each display unit includes: a first control circuit, a light-emitting pixel, a polarization layer, a nano-antenna structure, and a second control circuit, wherein... The first control circuit is connected to the light-emitting pixel, and the first control circuit applies a voltage to the light-emitting pixel, causing the light-emitting pixel to emit a first light beam toward the polarization layer; The polarization layer is disposed on the light-emitting side of the light-emitting pixel and is used to control the polarization direction of the second beam, which is the emitted beam after the first beam passes through the polarization layer. The nano-antenna structure is disposed on the side of the polarization layer away from the light-emitting pixel, and is used to control the scattering angle of the third beam, which is the output beam of the second beam after passing through the nano-antenna structure. The second control circuit is connected to the polarization layer or the nanoantenna structure and is used to switch the operating mode of the nanoantenna structure between satisfying the Kerker condition and not satisfying the Kerker condition. When the operating mode of the nanoantenna structure satisfies the Kerker condition, the scattering angle of the third beam is a first angle. When the operating mode of the nanoantenna structure does not satisfy the Kerker condition, the scattering angle of the third beam is a second angle. The first angle is different from the second angle to change the scattering angle of the third beam.

2. The display device according to claim 1, characterized in that, The second control circuit is connected to the polarization layer and is used to change the scattering angle of the third beam, including: The second control circuit is connected to the polarization layer, and the second control circuit applies a voltage to the polarization layer to change the polarization direction of the second beam. When the polarization direction of the second beam changes, the scattering angle of the third beam changes.

3. The display device according to claim 2, characterized in that, The nanoantenna structure includes a nanoantenna, which includes at least one of the following: Cube nanoantennas, cylindrical nanoantennas, or combined nanoantennas.

4. The display device according to claim 3, characterized in that, Changing the polarization direction of the second beam includes: The polarization direction of the second beam is changed so that it is parallel to the side length of the base of the cubic nanoantenna or the combined nanoantenna; or, The polarization direction of the second beam is changed so that it is parallel to the long axis of the bottom surface of the cylindrical nanoantenna.

5. The display device according to claim 1, characterized in that, The nanoantenna structure includes tunable materials; The second control circuit is connected to the nanoantenna structure and is used to change the scattering angle of the third beam, including: The second control circuit is connected to the nanoantenna structure, and the second control circuit applies a voltage to the tunable material to change the properties of the tunable material; When the properties of the tunable material change, the scattering angle of the third beam changes.

6. The display device according to claim 5, characterized in that, The second control circuit applies a voltage to the adjustable material to change the properties of the adjustable material, including: The second control circuit applies a voltage to the adjustable material, causing the adjustable material to change from an amorphous state to a crystalline state.

7. The display device according to claim 6, characterized in that, The second control circuit applies a voltage to the tunable material, causing the tunable material to change from an amorphous state to a crystalline state, including: The second control circuit applies a voltage to the tunable material, changing the dielectric constant of the tunable material and causing the tunable material to change from an amorphous state to a crystalline state.

8. The display device according to claim 6 or 7, characterized in that, The adjustable material includes germanium-antimony-tellurium material.

9. The display device according to claim 5, characterized in that, The second control circuit applies a voltage to the adjustable material to change the properties of the adjustable material, including: The second control circuit applies a voltage to the adjustable material, causing the adjustable material to change from a metallic state to a dielectric state.

10. The display device according to claim 9, characterized in that, The second control circuit applies a voltage to the tunable material, causing the tunable material to change from a metallic state to a dielectric state, including: The second control circuit applies a voltage to the tunable material, changing the conductivity of the tunable material, so that the tunable material changes from a metallic state to a dielectric state.

11. The display device according to claim 9 or 10, characterized in that, The adjustable material includes vanadium oxide.

12. The display device according to claim 5, characterized in that, The adjustable material is a liquid crystal material; The second control circuit applies a voltage to the adjustable material to change the properties of the adjustable material, including: The second control circuit applies a voltage to the liquid crystal material, changing the long axis direction of the liquid crystal molecules in the liquid crystal material to be parallel to the bottom surface of the nanoantenna.

13. A method for adjusting a display device, characterized in that, The display device is the device as described in any one of claims 1 to 12, and the method includes: Obtain a first instruction from the first target user, the first instruction instructing the display device to activate the anti-peeping display mode; A second instruction is sent to the display device, which instructs the second control circuit of the display device to apply a voltage to the polarization layer or nanoantenna structure to change the viewing angle of the display device to a first viewing angle.

14. The method according to claim 13, characterized in that, The first viewing angle is determined based on the first position of the first target user, and the method further includes: Obtain the second location of the first target user; A third instruction is sent to the display device, the third instruction instructing the viewing angle of the display device to be changed from the first viewing angle to a second viewing angle, the second viewing angle being determined based on a second position, which is different from the first position.

15. The method according to claim 13, characterized in that, The display device includes a first display unit and a second display unit. Changing the viewing angle of the display device to a first viewing angle includes: The viewing angle of the first display unit of the display device is changed to the first viewing angle, and the viewing angle of the second display unit of the display device is changed to the third viewing angle, wherein the first viewing angle is determined based on the position of the first target user, and the third viewing angle is determined based on the position of the second target user.

16. A display device, characterized in that, Includes a controller, memory, and display device. The display device is the device as described in any one of claims 1 to 12; The memory is used to store computer program instructions; The controller is configured to execute the computer program instructions to implement the method as described in any one of claims 13 to 15.

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