Display apparatus and variable viewing angle control method

Abstract

The invention discloses a display device and a variable visual angle control method, and relates to the technical field of display, the device comprises a light emitting adjustment module, a flexible light path layer arranged in an effective display area of the display device, and a human eye positioning module arranged in a non-display area of the display device; the non-display area is arranged on the periphery of the effective display area in a surrounding mode, and the human eye positioning module is arranged to determine a pupil center positioning point according to an eye gray scale image of a user and determine a light-emitting deflection angle of the display equipment according to a sight line deflection angle of the pupil center positioning point and a vertical distance from the pupil center positioning point to the effective display area; the light-emitting adjusting module is arranged on the light-emitting side of the flexible light path layer, the light-emitting adjusting module is connected with the human eye positioning module, and the light-emitting adjusting module is arranged to adjust the light-emitting direction angle of the flexible light path layer to be a light-emitting deflection angle. The invention aims to realize intelligent dynamic adjustment of the light-emitting visual angle of the display equipment so as to improve the viewing experience of a user.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display device and a variable viewing angle control method. Background Technology

[0002] In display device applications, the installation location inside a vehicle in a semi-outdoor environment places extremely high demands on display performance. It needs to meet high brightness (typical value above 1000 nits) to cope with strong ambient light interference and support multi-angle viewing to adapt to differences in user height, sitting posture and position.

[0003] Currently, most display devices use fixed-viewing-angle display technology. However, due to the fixed light emission direction and narrow viewing angle, existing fixed-viewing-angle display technology not only causes viewers who are off-center from the screen's normal viewing angle to experience severe brightness attenuation and color distortion, but also, because it cannot dynamically adjust according to the user's real-time position, the fixed light field distribution continuously causes glare interference, seriously affecting the user's viewing experience.

[0004] Therefore, how to achieve intelligent dynamic adjustment of the viewing angle of display devices to improve the user's viewing experience is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] The main purpose of this application is to provide a display device and a variable viewing angle control method, which aims to achieve intelligent dynamic adjustment of the display device's luminous viewing angle to improve the user's viewing experience.

[0006] To achieve the above objectives, this application provides a display device, the display device comprising: A flexible optical path layer is disposed in the effective display area of ​​the display device; The human eye positioning module is disposed in the non-display area of ​​the display device, which surrounds the effective display area. The human eye positioning module is configured to determine the pupil center positioning point based on the user's eye grayscale image, and to determine the light emission deflection angle of the display device based on the line of sight deflection angle of the pupil center positioning point and the vertical distance from the pupil center positioning point to the effective display area. A light emission adjustment module is disposed on the light emission side of the flexible optical path layer. The light emission adjustment module is connected to the human eye positioning module. The light emission adjustment module is configured to adjust the light emission direction angle of the flexible optical path layer to the light emission deflection angle.

[0007] In one embodiment, the light emission adjustment module is an electrorheological fluid control system, which includes a transparent conductive film and an electrorheological fluid layer. The transparent conductive film is fixedly disposed on the light-emitting side of the flexible optical path layer, and the electrorheological fluid layer is fixedly disposed on the side of the transparent conductive film away from the flexible optical path layer.

[0008] In one embodiment, the light emission adjustment module is a thermistor electronic control system, the thermistor electronic control system comprising: A thermal misalignment layer is fixedly disposed on the light-emitting side of the flexible optical path layer; A thermally actuated unit is disposed at both ends of the thermally sensitive misalignment layer. The thermally actuated unit includes a thermally sensitive layer and a thermally resistive layer. The thermally resistive layer is fixedly disposed on the light-emitting side of the flexible optical path layer, and the thermally sensitive layer is fixedly disposed on the side of the thermally resistive layer away from the flexible optical path layer. A fixing layer is fixedly disposed on the side of the thermal actuation unit away from the thermally sensitive misalignment layer.

[0009] In one embodiment, the light-emitting adjustment module is a hydraulic transmission system, which includes a hydraulic misalignment layer and a misalignment pushing mechanism; The hydraulic misalignment layer is fixedly disposed on the light-emitting side of the flexible optical path layer, and one side of the hydraulic misalignment layer is mechanically connected to the misalignment pushing mechanism.

[0010] In one embodiment, the flexible optical path layer includes: Backlight source layer; An optical path layer is disposed on the light-emitting side of the backlight source layer, and the optical path layer is provided with multiple conical optical structures formed by an exposure and development process; The liquid crystal layer has its lower surface fixedly disposed on the side of the optical path layer away from the backlight source layer, and its upper surface forms the light-emitting side of the flexible optical path layer. The liquid crystal layer is provided with pixel units corresponding to each of the conical optical structures.

[0011] Furthermore, to achieve the above objectives, this application also provides a variable viewing angle control method, which is applied to the display device described in any of the above claims, and the variable viewing angle control method includes: The user's eye grayscale image is obtained through the human eye positioning module. The pupil center positioning point is determined based on the eye grayscale image. The light emission deflection angle of the display device is determined based on the line of sight deflection angle of the pupil center positioning point and the vertical distance from the pupil center positioning point to the effective display area. The light emission adjustment module adjusts the light emission direction angle of the flexible optical path layer to the light emission deflection angle.

[0012] In one embodiment, the step of determining the pupil center location point based on the eye grayscale image includes: A binarized edge image is constructed based on the edge features of the grayscale image of the eye. Using a preset search radius, traverse each pixel on the binarized edge image and perform a circular region delineation operation to obtain the circular search region corresponding to each pixel; The center coordinates of the circular search area that intersects with the other circular search areas the most are determined as the pupil center location point.

[0013] In one embodiment, when the light emission adjustment module is an electrorheological fluid control system, the step of driving the light emission adjustment module to adjust the light emission direction angle of the flexible optical path layer to the light emission deflection angle includes: Obtain the driving current signal corresponding to the light emission deflection angle, and apply the driving current signal to the electrorheological fluid layer in the electrorheological fluid control system to obtain the current dielectric constant of the electrorheological fluid layer; The target refractive index of the electrorheological fluid layer is determined based on the square root value of the current dielectric constant. Based on the target refractive index, the light propagation path of the flexible optical path layer through the electrorheological liquid layer is adjusted so that the light emission direction angle of the flexible optical path layer is consistent with the light emission deflection angle.

[0014] In one embodiment, when the light emission adjustment module is a thermistor electronic control system, the step of driving the light emission adjustment module to adjust the light emission direction angle of the flexible optical path layer to the light emission deflection angle includes: Obtain the heating drive current corresponding to the light emission deflection angle, and apply the heating drive current to the thermal resistance layer in the thermistor control system; The thermal field energy is generated by the Joule heating effect of the thermal resistance layer, causing the thermal sensitive layer, which is fixedly connected to the thermal resistance layer, to deform and displace. The deformation displacement causes the thermal misalignment layer, which is fixedly connected to the thermal layer, to move by the deformation displacement, so as to adjust the light emission direction angle of the flexible optical path layer through the thermal misalignment layer to be consistent with the light emission deflection angle.

[0015] In one embodiment, when the light emission adjustment module is a hydraulic transmission system, the hydraulic transmission system includes a hydraulic misalignment layer and a misalignment pushing mechanism, the misalignment pushing mechanism being mechanically connected to the hydraulic misalignment layer, and the step of driving the light emission adjustment module to adjust the light emission direction angle of the flexible optical path layer to the light emission deflection angle includes: Obtain the hydraulic drive signal corresponding to the light emission deflection angle; In response to the hydraulic drive signal, the misalignment pushing mechanism is driven to move the hydraulic misalignment layer laterally, so as to adjust the light emission direction angle of the flexible optical path layer through the hydraulic misalignment layer to be consistent with the light emission deflection angle.

[0016] In addition, to achieve the above objectives, this application also provides an electronic device, which includes the above-described display device; Alternatively, a memory, a processor, and a variable-view control program stored in the memory and executable on the processor, wherein the processor, when executing the variable-view control program, implements the steps of the variable-view control method described above.

[0017] The display device of this application achieves intelligent dynamic adjustment of the display device's light emission angle through the coordinated control of a flexible optical path layer, a human eye positioning module, and a light emission adjustment module. Specifically, this application involves setting a flexible optical path layer in the effective display area of ​​a display device and configuring an eye positioning module in the non-display area surrounding the effective display area. This allows the eye positioning module to capture the user's eye grayscale image in real time, and accurately determine the pupil center positioning point based on the eye grayscale image. Next, based on the viewing angle of the pupil center positioning point and the vertical distance from the pupil center positioning point to the effective display area, the light emission deflection angle adapted to the user's viewing state is accurately calculated. Finally, through a light emission adjustment module located on the light-emitting side of the flexible optical path layer and connected to the eye positioning module, the light emission direction angle of the flexible optical path layer is adjusted in real time to match the light emission deflection angle. This intelligent dynamic adjustment of the light emission angle allows the display light from the display device to be continuously and accurately projected onto the user's eyes. This not only effectively overcomes the orientation deviation and field of view limitations of fixed-viewpoint displays, significantly improving visual clarity and color consistency under strong ambient light, but also fundamentally suppresses glare interference caused by light scattering. This ensures that users in any seat and any sitting posture can obtain a bright and color-accurate frontal viewing experience, thereby significantly improving the user's viewing experience. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural block diagram of the first embodiment of the display device of this application; Figure 2 This is a schematic diagram of the flexible optical path layer structure involved in the embodiments of this application; Figure 3This is a schematic diagram of the electrorheological fluid control system involved in the embodiments of this application; Figure 4 This is a schematic diagram of the thermal electronic control system involved in the embodiments of this application; Figure 5 This is a schematic diagram of the hydraulic transmission system involved in the embodiments of this application; Figure 6 This is a schematic diagram of the pixel arrangement involved in the embodiments of this application; Figure 7 This is a schematic diagram of the pupil positioning process involved in the embodiments of this application; Figure 8 This is a schematic diagram of the variable viewing angle adjustment of the thermal electronic control system involved in the embodiments of this application; Figure 9 This is a schematic diagram of the variable viewing angle adjustment of the hydraulic transmission system involved in the embodiments of this application; Figure 10 This is a schematic diagram of the structure of the display device involved in the embodiments of this application.

[0021] Explanation of icon numbers: 10. Flexible optical path layer; 11. Backlight source layer; 12. Optical path layer; 13. Liquid crystal layer; 20. Human eye positioning module; 30. Light emission adjustment module; AA1. Effective display area; NAA1. Non-display area; 31. Electrorheological fluid control system; 311. Transparent conductive film; 312. Electrorheological fluid layer; 32. Thermosensitive electronic control system; 321. Thermosensitive misalignment layer; 322. Thermal actuation unit; T0. Thermosensitive layer; R0. Thermal resistance layer; 323. Fixing layer; 33. Hydraulic transmission system; 331. Hydraulic misalignment layer; 332. Misalignment pushing mechanism.

[0022] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0024] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0025] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0026] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.

[0027] When display devices are used in automobiles as in-vehicle displays, the installation location in a semi-outdoor environment places extremely high demands on display performance. It is necessary to meet high brightness (typical value above 1000 nits) to cope with strong ambient light interference, and support multi-angle viewing to adapt to differences in user height, sitting posture and position.

[0028] Currently, most display devices use fixed-viewing-angle display technology. However, due to the fixed light emission direction and narrow viewing angle, existing fixed-viewing-angle display technology not only causes viewers who are off-center from the screen's normal viewing angle to experience severe brightness attenuation and color distortion, but also, because it cannot dynamically adjust according to the user's real-time position, the fixed light field distribution continuously causes glare interference, seriously affecting the user's viewing experience.

[0029] Therefore, how to achieve intelligent dynamic adjustment of the viewing angle of display devices is a technical problem that urgently needs to be solved.

[0030] Therefore, in order to achieve intelligent dynamic adjustment of the viewing angle of the display device to improve the user's viewing experience, this application provides a display device and a variable viewing angle control method.

[0031] This application provides a display device, referring to... Figure 1 As shown, Figure 1 This is a structural block diagram of the first embodiment of the display device of this application. The display device provided in this application includes: A flexible optical path layer 10 is disposed in the effective display area AA1 of the display device.

[0032] In this embodiment, the flexible optical path layer 10 is fixedly disposed on the effective display area AA1 of the display device. Since the effective display area AA1 is the direct presentation carrier of the display content, that is, the effective display area AA1 is the core area for viewing by the occupants of the vehicle, only by covering the effective display area AA1 with the flexible optical path layer 10 can the light transmission path cover all display pixels of the display device and ensure the complete presentation of the displayed image.

[0033] It should be noted that the flexible optical path layer 10 contains a backlight source layer 11, an optical path layer 12, and a liquid crystal layer 13 stacked in sequence.

[0034] For example, the backlight source layer 11 emits uniform white light as the basic light source of the display device. Next, the optical path layer 12 uses multiple conical optical structures formed by the exposure and development process to precisely guide the backlight light to the pixel units in the liquid crystal layer 13 corresponding to each conical optical structure, avoiding the backlight light from scattering to adjacent pixel units. This significantly improves the light flux of the backlight light through the conical optical structure to the corresponding pixel unit, thereby achieving brightness enhancement of the display device.

[0035] The human eye positioning module 20 is disposed in the non-display area NAA1 of the display device. The non-display area NAA1 is disposed around the periphery of the effective display area AA1. The human eye positioning module 20 is configured to determine the pupil center positioning point based on the grayscale image of the user's eye, and determine the light emission deflection angle of the display device based on the line of sight deflection angle of the pupil center positioning point and the vertical distance from the pupil center positioning point to the effective display area AA1.

[0036] In this embodiment, the human eye positioning module 20 is positioned in the non-display area NAA1 surrounding the effective display area AA1. Since the non-display area NAA1 does not affect the display content, it will not cause visual interference to the user's viewing experience. Furthermore, the non-display area NAA1 also has reserved wiring space to facilitate the circuit connection between the human eye positioning module 20 and the subsequent light emission adjustment module 30. The human eye positioning module 20 responds to the display device's power-on command by acquiring a grayscale image of the user's eyes in real time, and accurately obtains the pupil center positioning point based on this image. Next, based on the viewing angle of the pupil center positioning point and the vertical distance from the pupil center positioning point to the effective display area AA1, it accurately calculates the light emission deflection angle adapted to the user's viewing state, avoiding the limitations of a fixed viewing angle.

[0037] It should be noted that the human eye positioning module 20 can be an image acquisition sensor, a miniature camera, or an infrared probe, etc. Only one human eye positioning module 20 can be set, or multiple human eye positioning modules 20 can be set in the non-display area NAA1 according to user needs to realize multi-angle eye grayscale image acquisition and avoid pupil positioning failure caused by hand blocking or hair blocking at a single angle.

[0038] The light emission adjustment module 30 is disposed on the light emission side of the flexible optical path layer 10. The light emission adjustment module 30 is connected to the human eye positioning module 20. The light emission adjustment module 30 is configured to adjust the light emission direction angle of the flexible optical path layer 10 to the light emission deflection angle.

[0039] In this embodiment, a light emission adjustment module 30 is provided on the light-emitting side of the flexible optical path layer 10. After receiving the light emission deflection angle sent by the human eye positioning module 20, the light emission adjustment module 30 changes the light refraction path by adjusting its own structural changes (such as changes in the refractive index of electrorheological fluid, thermosensitive deformation, and hydraulic actuation). This makes the light emission direction angle of the light emitted from the flexible optical path layer 10 consistent with the light emission deflection angle. Thus, the display light of the display device can be continuously and accurately projected to the user's eyes through intelligent dynamic adjustment of the light emission angle. This not only effectively overcomes the orientation deviation and field of view limitations of fixed viewing angle display, but also significantly improves the visual clarity and color consistency under strong ambient light. Furthermore, it fundamentally suppresses glare interference caused by light scattering, ensuring that users in any seat and any sitting posture can obtain a bright and true-color frontal viewing experience, thereby significantly improving the user's viewing experience.

[0040] Furthermore, in some other feasible embodiments, reference is made to... Figure 2 The flexible optical path layer 10 includes: a backlight layer; an optical path layer 12 disposed on the light-emitting side of the backlight source layer 11, the optical path layer 12 having a plurality of conical optical structures formed by an exposure and development process; and a liquid crystal layer 13, the lower surface of the liquid crystal layer 13 being fixedly disposed on the side of the optical path layer 12 away from the backlight source layer 11, the upper surface of the liquid crystal layer 13 constituting the light-emitting side of the flexible optical path layer 10, and the liquid crystal layer 13 having pixel units corresponding to each of the conical optical structures.

[0041] In this embodiment, the present invention uses a flexible optical path layer 10 that integrates a backlight source layer 11, an optical path layer 12 and a liquid crystal layer 13, thereby achieving a significant improvement in the brightness of the display device and precise control of the light effect. Specifically, the backlight source layer 11 provides uniform and stable white light as the basic light source for the display device, ensuring the uniformity of the backlight display. Subsequently, the optical path layer 12 is disposed between the backlight source layer 11 and the liquid crystal layer 13. Multiple conical optical structures formed in the optical path layer 12 through a high-precision exposure and development process are used to achieve directional control of the backlight light. This efficiently and accurately couples the backlight light to the pixel units in the liquid crystal layer 13 corresponding to each conical optical structure, greatly reducing the scattering and crosstalk of the backlight light during transmission. This effectively prevents backlight leakage to adjacent pixel areas and significantly improves the luminous flux of the backlight light passing through the conical optical structures to the corresponding pixel units, achieving a substantial increase in display brightness. This is especially suitable for the visibility requirements under high ambient light in automotive environments. At the same time, it also helps to reduce the overall power consumption of the display device, improve contrast and image clarity, and enhance the reliability and visual experience of the display device.

[0042] It should be noted that a pixel unit can be understood as a color resist film made of resin-based flexible material, and the pixel structure of this color resist film can be... Figure 6 The long rectangular structure shown in (a) can also be Figure 6 The dotted structure shown in (b) is... Figures 3 to 6 The label R in the text represents a red pixel unit, i.e., a red color resist. Figures 3 to 6 The label G in the text represents a green pixel unit, i.e., a green color resist. Figures 3 to 6 The label B in the image represents a blue pixel unit, i.e., a blue color resist.

[0043] In a specific embodiment, in order to improve light energy utilization and optimize display performance, this application will Figure 6 The elongated pixel arrangement shown in (a) is changed to Figure 6 The dot arrangement shown in (b) achieves a total internal reflection light path design, effectively suppressing light leakage and scattering, allowing more light to efficiently penetrate the liquid crystal layer 13, reducing light brightness loss, which not only improves the overall screen brightness of the display device, but also improves the problems of viewing angle-dependent color shift and contrast reduction, and helps to maintain more stable image quality and optical performance during variable viewing angle display.

[0044] Furthermore, in some feasible embodiments, reference is made to Figure 3 The light emission adjustment module 30 is an electrorheological fluid control system 31, which includes a transparent conductive film 311 and an electrorheological fluid layer 312. The transparent conductive film 311 is fixedly disposed on the light-emitting side of the flexible optical path layer 10, and the electrorheological liquid layer 312 is fixedly disposed on the side of the transparent conductive film 311 away from the flexible optical path layer 10.

[0045] In this embodiment, refer to Figure 3 When the light emission adjustment module 30 is an electrorheological fluid control system 31, the electrorheological fluid control system 31 includes at least a transparent conductive film 311 and an electrorheological fluid layer 312. In this application, the transparent conductive film 311 is disposed between the flexible optical path layer 10 and the electrorheological fluid layer 312. Specifically, the transparent conductive film 311 is deposited on the surface of the flexible optical path layer 10 facing the light emission direction, and the electrorheological fluid layer 312 is attached to the transparent conductive film 311. After the electrorheological fluid control system 31 receives the light emission deflection angle sent by the human eye positioning module 20, it obtains the corresponding light emission angle. The driving current signal corresponding to the light emission deflection angle is transmitted through the wire to the transparent conductive film 311, so that the transparent conductive film 311 uniformly conducts the driving current signal to the electrorheological liquid layer 312 fixedly connected to it. Then, the electrorheological liquid layer 312 realizes the corresponding optical refractive index change according to the driving current signal, so as to precisely adjust the light emission direction angle of the flexible optical path layer 10 until the light emission direction angle is consistent with the light emission deflection angle. Thus, the intelligent dynamic adjustment of the light emission angle of the display device is realized through the electrorheological liquid control system 31.

[0046] It should be noted that the transparent conductive film 311 can be understood as a thin film with high light transmittance and conductivity, used to apply a driving current signal to the electrorheological fluid layer 312 while allowing light to pass through. This transparent conductive film 311 can be an ITO (Indium Tin Oxide) film or a graphene film.

[0047] The electrorheological fluid material in the electrorheological fluid layer 312 can be an ER (Electrorheological) fluid, which is composed of solid particles with high dielectric constant uniformly dispersed in an insulating oil (i.e., base fluid) with low dielectric constant. The solid particles are composed of common inorganic materials such as silica gel, aluminosilicates, composite metal oxides or composite metal hydroxides, as well as polymer materials; the insulating oil can be silicone oil or mineral oil, etc.

[0048] Furthermore, in some other feasible embodiments, reference is made to... Figure 4The light emission adjustment module 30 is a thermal electronic control system 32, which includes: a thermal misalignment layer 321, which is fixedly disposed on the light-emitting side of the flexible optical path layer 10; a thermal actuation unit 322, which is disposed at both ends of the thermal misalignment layer 321, and includes a thermally sensitive layer T0 and a thermally resistive layer R0, wherein the thermally resistive layer R0 is fixedly disposed on the light-emitting side of the flexible optical path layer 10, and the thermally sensitive layer T0 is fixedly disposed on the side of the thermally resistive layer R0 away from the flexible optical path layer 10; and a fixing layer 323, which is fixedly disposed on the side of the thermally actuation unit 322 away from the thermally sensitive misalignment layer 321.

[0049] In this embodiment, refer to Figure 4 In this application, a thermal control system 32 is stacked on the light-emitting side of the flexible optical path layer 10. The thermal control system 32 integrates a thermal misalignment layer 321, a thermal actuation unit 322, and a fixing layer 323. When the thermal control system 32 receives the light emission deflection angle sent by the human eye positioning module 20, it applies a heating drive current corresponding to the light emission deflection angle to the thermal resistance layer R0 in the thermal actuation unit 322. The heating drive current is efficiently converted into localized thermal field energy by utilizing the Joule heating effect of the thermal resistance layer R0. This causes the thermal layer T0, which is fixedly connected to the thermal resistance layer R0, to undergo linear deformation under the action of the thermal field energy. This mechanically drives the misalignment layer to undergo lateral displacement. Thus, the light reflection path of the flexible optical path layer 10 can be adjusted in real time by the thermal misalignment layer 321 that sends the lateral displacement, until the light emission direction angle of the flexible optical path layer 10 is adjusted to be consistent with the light emission deflection angle through the thermal misalignment layer 321. This achieves intelligent dynamic adjustment of the light emission angle of the display device.

[0050] It should be noted that the thermal misalignment layer 321 is a grating structure with precise period and shape fabricated on a thin sheet made of a transparent flexible material using micro-nano processing techniques (such as photolithography and nanoimprinting). This transparent flexible material can be polyimide. The thermal misalignment layer 321 is mechanically coupled to the thermal layer T0. When the thermal layer T0 undergoes linear deformation (expansion or contraction) due to heat, the resulting mechanical driving force is directly transmitted to the thermal misalignment layer 321, driving it to produce lateral displacement or micro-angle deflection. This causes a change in the incident angle of the initial light emitted from the flexible optical path layer 10 into the grating structure. Furthermore, through the refraction and diffraction of the grating structure, the light emission direction angle of the flexible optical path layer 10 is deflected by the grating structure to match the light emission deflection angle, thereby ensuring the accuracy of the display device's light emission viewing angle adjustment.

[0051] The thermally actuated unit 322 includes a thermistor layer T0 and a thermal resistance layer R0. This thermal actuation unit can be understood as a unit that drives the thermistor misalignment layer 321 to move laterally by mechanical driving force generated by the principle of thermal expansion and contraction. For example, in this application, the thermally actuated unit 322 is disposed at both ends of the thermistor misalignment layer 321. The two ends of the thermistor misalignment layer 321 can be understood as the left and right sides of the thermistor misalignment layer 321, and the thermistor layers T0 in the left and right thermally actuated units 322 have opposite thermal response designs, that is, when the thermistor layer T0 on one side is designed to expand when heated, the thermistor layer T0 on the other side is designed to contract when cooled. For example, when the left thermistor layer T0 expands under the Joule heating effect of the thermal resistance layer R0, the right thermistor layer T0 actively cools and contracts under current control; conversely, when the right thermistor layer T0 expands under the Joule heating effect of the thermal resistance layer R0, the left thermistor layer T0 actively cools and contracts under current control. That is, the lateral leftward or rightward shift of the thermistor misalignment layer 321 is achieved through the differentiated linear deformation of the left and right thermal actuation units 322. For example, the expansion of the left thermal actuation unit 322 and the contraction of the right thermal actuation unit 322 generate a mechanical driving force carrying a linear deformation displacement to the right, driving the thermistor misalignment layer 321 to shift laterally to the right by this linear deformation displacement; conversely, the contraction of the left thermal actuation unit 322 and the expansion of the right thermal actuation unit 322 generate a mechanical driving force carrying a linear deformation displacement to the left, driving the thermistor misalignment layer 321 to shift laterally to the left by this linear deformation displacement.

[0052] The fixing layer 323 is a support layer made of rigid material (such as aluminum alloy) or high-strength flexible material (such as carbon fiber composite material). The fixing layer 323 is located on the left and right sides of the thermal actuation unit 322 away from the thermally sensitive misalignment layer 321 to provide a mechanical anchoring point for the thermal actuation unit 322, ensuring that the mechanical driving force generated by the thermal actuation unit 322 can be effectively transmitted to the movable thermally sensitive misalignment layer 321, rather than the thermal actuation unit 322 itself undergoing useless overall displacement.

[0053] Furthermore, in some feasible embodiments, reference is made to Figure 5 The light emission adjustment module 30 is a hydraulic transmission system 33, which includes a hydraulic misalignment layer 331 and a misalignment pushing mechanism 332. The hydraulic misalignment layer 331 is fixedly disposed on the light-emitting side of the flexible optical path layer 10, and one side of the hydraulic misalignment layer 331 is mechanically connected to the misalignment pushing mechanism 332.

[0054] In this embodiment, refer to Figure 5When the light emission adjustment module 30 is a hydraulic transmission system 33 integrating a hydraulic misalignment layer 331 and a misalignment pushing mechanism 332, after the hydraulic control system receives the light emission deflection angle sent by the human eye positioning module 20, it applies a hydraulic drive signal corresponding to the light emission deflection angle to the misalignment pushing mechanism 332. The misalignment pushing mechanism 332 responds to the hydraulic drive signal and drives the mechanically connected misalignment pushing mechanism 332 to move laterally, so that the light emission direction angle of the flexible optical path layer 10 via the hydraulic misalignment layer 331 is adjusted to be consistent with the light emission deflection angle, thereby realizing the intelligent dynamic adjustment of the light emission angle of the display device.

[0055] It should be noted that the hydraulic misalignment layer 331 is the same as the thermal misalignment layer 321. That is, the hydraulic misalignment layer 331 is also a grating structure with precise period and shape prepared on a thin sheet made of transparent flexible material (i.e., polyimide) using micro-nano processing technology.

[0056] In summary, the display device of this application achieves intelligent dynamic adjustment of the light emission angle through the coordinated control of the flexible optical path layer 10, the human eye positioning module 20, and the light emission adjustment module 30. Specifically, this application sets a flexible optical path layer 10 in the effective display area AA1 of the display device, and configures a human eye positioning module 20 in the non-display area NAA1 surrounding the effective display area AA1. This allows the human eye positioning module 20 to capture the grayscale image of the user's eye in real time, and accurately obtain the pupil center positioning point based on the eye grayscale image. Next, based on the viewing angle of the pupil center positioning point and the vertical distance from the pupil center positioning point to the effective display area AA1, the light emission deflection angle adapted to the user's viewing state is accurately calculated. Finally, by setting the light-emitting side of the flexible optical path layer 10 and the human eye positioning module 30, the light emission angle is adjusted accordingly. The light emission adjustment module 30 connected to module 20 adjusts the light emission direction angle of the flexible optical path layer 10 in real time to match the light emission deflection angle. This allows the display light from the display device to be continuously and accurately projected onto the user's eyes through intelligent dynamic adjustment of the light emission angle. This not only effectively overcomes the orientation deviation and field of view limitations of fixed-viewpoint displays, but also significantly improves visual clarity and color consistency under strong ambient light. Furthermore, it fundamentally suppresses glare interference caused by light scattering, ensuring that users in any seat and any sitting posture can obtain a bright and true-to-life frontal viewing experience, thereby significantly improving the user's viewing experience.

[0057] Furthermore, based on the first embodiment of the display device of this application, a second embodiment of the variable viewing angle control method of this application is proposed.

[0058] The variable viewing angle control method of this application is applied to any of the above-mentioned display devices. The variable viewing angle control method of this application is executed by the display device applied to the display device. The variable viewing angle control method of this application includes the following implementation steps S10 to S20.

[0059] Step S10: Obtain the grayscale image of the user's eye through the human eye positioning module 20, determine the pupil center positioning point based on the eye grayscale image, and determine the light emission deflection angle of the display device based on the line of sight deflection angle of the pupil center positioning point and the vertical distance from the pupil center positioning point to the effective display area AA1.

[0060] In this embodiment, the human eye positioning module 20 responds to the display device's power-on command by acquiring the user's eye grayscale image in real time. Next, it constructs a binarized edge image based on the edge features of the eye grayscale image. Using a preset search radius, it traverses each pixel on the binarized edge image and performs a circular region delineation operation to obtain the circular search region corresponding to each pixel. Subsequently, the center coordinates of the circular search region with the most intersections with other circular search regions are determined as the pupil center positioning point. This effectively overcomes interference caused by changes in ambient light inside the vehicle and minor head movements, providing a stable input basis for subsequent accurate calculation of the light emission deflection angle. Next, after determining the pupil center positioning point, the human eye positioning module 20 acquires the vertical distance from the pupil center positioning point to the effective display area AA1, as well as the viewing angle of the pupil center positioning point. Then, based on this vertical distance and viewing angle, the light emission deflection angle of the display device can be accurately calculated, providing stable and reliable input parameters for the subsequent light path control of the light emission adjustment module 30. This ensures that the displayed content is always accurately aligned with the user's viewing angle, avoiding the limitations of a fixed viewing angle.

[0061] In a specific embodiment, refer to Figure 7 The above step S10, which determines the light emission deflection angle of the display device based on the line of sight deflection angle of the pupil center positioning point and the vertical distance from the pupil center positioning point to the effective display area AA1, may also include the following implementation steps S1 to S3.

[0062] Step S1: Collect the distance L from the pupil center positioning point to the human eye positioning module 20 itself through the human eye positioning module 20; and take the angle ∠A between the line distance I of the human eye (i.e., the pupil center positioning point) looking at the human eye positioning module 20 and the plane line distance c of the effective display area AA1 as the line deflection angle of the pupil center positioning point. Step S2: Calculate the vertical distance H from the pupil center positioning point to the effective display area AA1 using the algorithm H=sinA*I, and then... The distance between the pupil center and the line of sight to the effective display area AA1 was calculated. ; Step S3: Calculate the light emission deflection angle of the display device based on the algorithm ∠B=arcsin(H / d).

[0063] Step S20: Drive the light emission adjustment module 30 to adjust the light emission direction angle of the flexible optical path layer 10 to the light emission deflection angle.

[0064] In this embodiment, the human eye positioning module 20 is positioned in the non-display area NAA1 surrounding the effective display area AA1. Since the non-display area NAA1 does not affect the display content, it will not cause visual interference to the user's viewing experience. Furthermore, the non-display area NAA1 also has reserved wiring space to facilitate the circuit connection between the human eye positioning module 20 and the subsequent light emission adjustment module 30. The human eye positioning module 20 responds to the display device's power-on command by acquiring a grayscale image of the user's eyes in real time, and accurately obtains the pupil center positioning point based on this image. Next, based on the viewing angle of the pupil center positioning point and the vertical distance from the pupil center positioning point to the effective display area AA1, it accurately calculates the light emission deflection angle adapted to the user's viewing state, avoiding the limitations of a fixed viewing angle.

[0065] Furthermore, in some other feasible embodiments, the above step S10: determining the pupil center positioning point based on the eye grayscale image may also include the following implementation steps S101 to S103.

[0066] Step S101: Construct a binarized edge image based on the edge features of the grayscale image of the eye.

[0067] In this embodiment, the grayscale image of the eye is preprocessed. Specifically, the grayscale image of the eye is filtered and denoised to reduce environmental noise and acquisition interference. Contrast stretching or histogram equalization can be performed to enhance the salience of edge regions in the grayscale image of the eye. Next, the edge features of the preprocessed grayscale image of the eye are extracted by the human eye localization module 20. These edge features include the edge contours of structures such as the pupil, iris, and eyelid. Subsequently, a grayscale edge image is constructed based on these edge features, and each pixel in the grayscale edge image is binarized according to a preset edge grayscale threshold. For example, in the grayscale edge image, pixels with a grayscale value greater than or equal to the edge grayscale threshold are set to a high brightness value (e.g., 255), while pixels with a grayscale value less than the edge grayscale threshold are set to a low brightness value (e.g., 0). Finally, a binarized edge image that retains only significant edge structures is generated to provide clear and stable feature input for subsequent pupil localization.

[0068] Step S102: Using a preset search radius, traverse each pixel on the binarized edge image and perform a circular region delineation operation to obtain the circular search region corresponding to each pixel.

[0069] In this embodiment, each pixel in the binarized edge image is traversed by a preset search radius, and a circular search area is defined with each pixel as the center. Each circular search area covers the distribution of edge pixels within a specific radius around it, thereby generating a corresponding candidate area for each pixel. This candidate area is used for subsequent statistical analysis of its spatial correlation with the surrounding edges, providing a geometric feature basis for pupil center localization.

[0070] Step S103: Determine the center coordinates of the circular search area that intersects with the other circular search areas the most, and use it as the pupil center positioning point.

[0071] In this embodiment, based on all the circular search areas generated in step S102, the number of intersections between each circular search area and all other circular areas is calculated, and the circular area with the most intersections is determined as the area that best represents the consistency of the pupil outline. The center coordinates of the circular search area with the most intersections are finally determined as the pupil center positioning point, thereby achieving highly robust pupil positioning and providing a stable and reliable input benchmark for subsequent viewing angle calculation.

[0072] It should be noted that the expression for the circular search region with the largest number of intersections is:

[0073] In other words, a set of optimal parameters is obtained based on the above expression. The circular search region that maximizes the absolute value term in the formula is the circular search region with the largest number of intersections, where... The radius of the circular search area to be detected is the search radius. Indicates the coordinates of the center of the circle to be detected; It is a Gaussian filter used to smooth noise; Indicates about the search radius Find the partial derivatives; This indicates the corresponding coordinate position on the binarized edge image. The pixel grayscale value of the pixel.

[0074] In a specific embodiment, all possible circular search regions are searched in the binarized edge image, and the edge matching score of each circular search region is calculated based on the absolute value term. The center coordinates of the circular search region with the highest score are then determined. As the center point of the pupil.

[0075] Furthermore, in some feasible embodiments, when the light emission adjustment module 30 is an electrorheological fluid control system 31, the above step S20: driving the light emission adjustment module 30 to adjust the light emission direction angle of the flexible optical path layer 10 to the light emission deflection angle may also include the following implementation steps S201 to S203.

[0076] Step S201: Obtain the driving current signal corresponding to the light emission deflection angle, and apply the driving current signal to the electrorheological fluid layer 312 in the electrorheological fluid control system 31 to obtain the current dielectric constant of the electrorheological fluid layer 312.

[0077] In this embodiment, refer to Figure 3 as well as Figure 8 Based on the calculated emission deflection angle, the corresponding driving current signal ΔI is obtained through a preset current-refractive index mapping table, and this driving current signal ΔI is applied to the electrorheological fluid layer 312 (ER fluid) covering the ITO transparent conductive film 311. The driving current signal ΔI generates a corresponding control electric field E between the ITO electrodes. The intensity of the control electric field E is positively correlated with the driving current signal ΔI, i.e., E∝ΔI. Under the action of the control electric field E, the solid particles in the ER fluid are polarized and rearranged along the direction of the electric field, resulting in an increase in the overall dielectric constant of the ER fluid. The change occurs, and the functional relationship is satisfied. ,in The polarizability related to the controlled electric field E, This indicates the current dielectric constant of the ER fluid under the influence of the controlled electric field E, providing an accurate data basis for subsequent accurate calculation of the refractive index.

[0078] Step S202: Determine the target refractive index of the electrorheological liquid layer 312 based on the square root value of the current dielectric constant.

[0079] In this embodiment, refer to Figure 3 as well as Figure 8 The change in the dielectric constant of the current-rheological liquid layer 312 will further cause a change in the refractive index of the current-rheological liquid layer 312. This can be achieved by real-time acquisition of the current dielectric constant. and in Figure 8 The embedded optical system shown is based on the algorithm and the current dielectric constant The target refractive index n can be calculated accurately, ensuring the speed and accuracy of the target refractive index n calculation.

[0080] Step S203: Based on the target refractive index, adjust the light propagation path of the flexible optical path layer 10 through the electrorheological liquid layer 312 so that the light emission direction angle of the flexible optical path layer 10 is consistent with the light emission deflection angle.

[0081] In this embodiment, refer to Figure 3 as well as Figure 8 After determining the target refractive index n, through Figure 8 The optical sensor shown collects the actual incident angle ∠i of light entering the electrorheological fluid layer 312 from the flexible optical path layer 10 in real time, and calculates the exit direction angle ∠r of the light passing through the electrorheological fluid layer 312 according to Snell's law n=sin i / sin r. If there is a deviation between the exit direction angle ∠r and the light emission deflection angle ∠B, the deviation result is fed back to the electrorheological fluid control system 31, which dynamically adjusts the signal duty cycle of the driving current signal applied to the ITO transparent conductive film 311 to fine-tune the target refractive index of the electrorheological fluid layer 312 until the exit direction angle ∠r is consistent with the light emission deflection angle ∠B, thereby realizing the intelligent dynamic adjustment of the light emission angle of the display device.

[0082] Furthermore, in some other feasible embodiments, when the light emission adjustment module 30 is a thermal electronic control system 32, the above step S20: driving the light emission adjustment module 30 to adjust the light emission direction angle of the flexible optical path layer 10 to the light emission deflection angle may also include the following implementation steps A10 to A30.

[0083] Step A10: Obtain the heating drive current corresponding to the light emission deflection angle, and apply the heating drive current to the thermal resistance layer R0 in the thermistor control system 32.

[0084] In this embodiment, refer to Figure 4 The heating current corresponding to the light emission deflection angle is obtained by looking up the preset heating current-angle mapping table based on the light emission deflection angle; and the heating current is applied to the thermal resistance layer R0 through the driving circuit integrated in the edge of the effective display area AA1.

[0085] It should be noted that the thermal resistance layer R0 is made of a material with a high temperature coefficient of resistance. This thermal resistance layer R0 can be a thermistor patch, and the resistance value of the thermistor patch changes with temperature.

[0086] Step A20: The thermal field energy is generated by the Joule heating effect of the thermal resistance layer R0, causing the thermal sensitive layer T0, which is fixedly connected to the thermal resistance layer R0, to deform and displace.

[0087] In this embodiment, refer to Figure 4 The thermal resistance layer R0 after energization is based on the Joule heating effect P=I 2 R(T) converts the heating driving current I flowing through the thermal resistance layer R0 into thermal field energy P, where R(T) represents the resistance R of the thermal resistance layer R0 as a function of temperature T; at this time, it is fixedly set at... Figure 4 The thermally sensitive layer T0 on the surface undergoes deformation and displacement under the influence of thermal field energy. This deformation and displacement is calculated according to the formula... To perform precise calculations, among which, This represents the coefficient of linear expansion of the thermosensitive layer T0. This represents the initial length of the thermal layer T0. This represents the temperature change of the thermistor layer T0 under the influence of thermal field energy.

[0088] It should be noted that the thermosensitive material used in the thermosensitive layer T0 is an organic polymer material, such as polyimide or polyphenylene amine. This thermosensitive material has a high coefficient of linear thermal expansion (16~20ppm / ℃).

[0089] Step A30: The deformation displacement drives the thermal misalignment layer 321, which is fixedly connected to the thermal layer T0, to move the deformation displacement, so as to adjust the light emission direction angle of the flexible optical path layer 10 through the thermal misalignment layer 321 to be consistent with the light emission deflection angle.

[0090] In this embodiment, the deformation displacement generated by the thermal layer T0 The thermally sensitive misalignment layer 321, which is fixedly connected to it, is directly pushed to move laterally. Since the thermally sensitive misalignment layer 321 is made of a soft grating material (such as polyimide), the displacement of the thermally sensitive misalignment layer 321 changes the relative position of adjacent grating structures, thereby modulating the light transmission path; at the same time, Figure 4 The color resist sheet attached to the thermal misalignment layer 321 in the flexible optical path layer 10 moves with the movement of the thermal misalignment layer 321 to change the light transmission path until the light emission direction angle of the flexible optical path layer 10 through the thermal misalignment layer 321 is consistent with the light emission deflection angle, thereby realizing the intelligent dynamic adjustment of the light emission angle of the display device.

[0091] Furthermore, in some feasible embodiments, when the light emission adjustment module 30 is a hydraulic transmission system 33, the hydraulic transmission system 33 includes a hydraulic misalignment layer 331 and a misalignment pushing mechanism 332, the misalignment pushing mechanism 332 is mechanically connected to the hydraulic misalignment layer 331, and the above step S20: driving the light emission adjustment module 30 to adjust the light emission direction angle of the flexible optical path layer 10 to the light emission deflection angle may also include the following implementation steps B10 to B20.

[0092] Step B10: Obtain the hydraulic drive signal corresponding to the light emission deflection angle; Step B20: In response to the hydraulic drive signal, drive the misalignment pushing mechanism 332 to move the hydraulic misalignment layer 331 laterally, so as to adjust the light emission direction angle of the flexible optical path layer 10 through the hydraulic misalignment layer 331 to be consistent with the light emission deflection angle.

[0093] In this embodiment, refer to Figure 4 as well as Figure 8The misaligned promotion mechanism 332 includes at least the following: Figure 8 The hydraulic transmission system 33, as shown, receives the light deflection angle sent by the human eye positioning module 20 after receiving the light. The hydraulic transmission system 33 calculates the target lateral displacement required by the hydraulic misalignment layer 331 through its built-in controller and transmits the hydraulic drive signal corresponding to the target lateral displacement to the control valve group, which integrates a directional valve, a relief valve, and a flow valve. By adjusting the valve core opening and direction of the control valve group, the flow direction, flow rate, and pressure of the pressurized oil are precisely controlled. At this time, the hydraulic pump draws oil from the oil tank and pressurizes it. The generated pressurized oil drives the hydraulic motor in the actuator through the control valve group. The hydraulic motor outputs the pressurized oil as a linear or rotational mechanical motion (e.g., the linear displacement of the push rod or the angular displacement of the rotating shaft), thereby causing the hydraulic misalignment layer 331, which is mechanically connected to it, to move laterally. The displacement of the hydraulic misalignment layer 331 causes the color resist sheet in the flexible optical path layer 10 attached thereto to move in coordination, so as to change the relative optical position between the color resist sheet and the backlight source layer 11, thereby modulating the light path propagation direction, and finally realizing that the light emission direction angle of the flexible optical path layer 10 via the hydraulic misalignment layer 331 is consistent with the light emission deflection angle, thereby realizing the intelligent dynamic adjustment of the light emission angle of the display device.

[0094] In summary, the display device of this application achieves intelligent dynamic adjustment of the light emission angle through the coordinated control of the flexible optical path layer 10, the human eye positioning module 20, and the light emission adjustment module 30. Specifically, this application sets a flexible optical path layer 10 in the effective display area AA1 of the display device, and configures a human eye positioning module 20 in the non-display area NAA1 surrounding the effective display area AA1. This allows the human eye positioning module 20 to capture the grayscale image of the user's eye in real time, and accurately obtain the pupil center positioning point based on the eye grayscale image. Next, based on the viewing angle of the pupil center positioning point and the vertical distance from the pupil center positioning point to the effective display area AA1, the light emission deflection angle adapted to the user's viewing state is accurately calculated. Finally, by setting the light-emitting side of the flexible optical path layer 10 and the human eye positioning module 30, the light emission angle is adjusted accordingly. The light emission adjustment module 30 connected to module 20 adjusts the light emission direction angle of the flexible optical path layer 10 in real time to match the light emission deflection angle. This allows the display light from the display device to be continuously and accurately projected onto the user's eyes through intelligent dynamic adjustment of the light emission angle. This not only effectively overcomes the orientation deviation and field of view limitations of fixed-viewpoint displays, but also significantly improves visual clarity and color consistency under strong ambient light. Furthermore, it fundamentally suppresses glare interference caused by light scattering, ensuring that users in any seat and any sitting posture can obtain a bright and true-to-life frontal viewing experience, thereby significantly improving the user's viewing experience.

[0095] In addition, this application also provides an electronic device. Please refer to... Figure 10 , Figure 10 This is a schematic diagram of the electronic device involved in the embodiments of this application. Specifically, the electronic device in the embodiments of this application may be a device that locally runs a variable viewing angle control method.

[0096] like Figure 10 As shown, the electronic device in this embodiment may include: a display panel; or a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen, an input unit such as a keyboard, and optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface).

[0097] The memory 1005 is disposed on the main body of the electronic device. The memory 1005 stores a program that, when executed by the processor 1001, performs corresponding operations. The memory 1005 is also used to store parameters for use by the electronic device. The memory 1005 can be a high-speed RAM or a stable, non-volatile memory, such as a disk drive. Optionally, the memory 1005 can also be a storage device independent of the aforementioned processor 1001.

[0098] Those skilled in the art will understand that Figure 10 The electronic device structure shown does not constitute a limitation on the electronic device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0099] like Figure 10 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and a variable view control program.

[0100] exist Figure 10 In the electronic device shown, the processor 1001 can be used to call the variable viewing angle control program stored in the memory 1005 and execute the steps of the variable viewing angle control method as described above.

[0101] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0102] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0103] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a display device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0104] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A display device, characterized in that, The display device includes: A flexible optical path layer is disposed in the effective display area of ​​the display device; The human eye positioning module is disposed in the non-display area of ​​the display device, which surrounds the effective display area. The human eye positioning module is configured to determine the pupil center positioning point based on the user's eye grayscale image, and to determine the light emission deflection angle of the display device based on the line of sight deflection angle of the pupil center positioning point and the vertical distance from the pupil center positioning point to the effective display area. A light emission adjustment module is disposed on the light emission side of the flexible optical path layer. The light emission adjustment module is communicatively connected to the human eye positioning module. The light emission adjustment module is configured to adjust the light emission direction angle of the flexible optical path layer to the light emission deflection angle.

2. The display device as described in claim 1, characterized in that, The light emission adjustment module is an electrorheological fluid control system, which includes a transparent conductive film and an electrorheological fluid layer. The transparent conductive film is fixedly disposed on the light-emitting side of the flexible optical path layer, and the electrorheological fluid layer is fixedly disposed on the side of the transparent conductive film away from the flexible optical path layer.

3. The display device as described in claim 1, characterized in that, The light emission adjustment module is a thermal electronic control system, which includes: A thermal misalignment layer is fixedly disposed on the light-emitting side of the flexible optical path layer; A thermally actuated unit is disposed on both sides of the thermally sensitive misalignment layer. The thermally actuated unit includes a thermally sensitive layer and a thermally resistive layer. The thermally resistive layer is fixedly disposed on the light-emitting side of the flexible optical path layer, and the thermally sensitive layer is fixedly disposed on the side of the thermally resistive layer away from the flexible optical path layer. A fixing layer is fixedly disposed on the side of the thermal actuation unit away from the thermally sensitive misalignment layer.

4. The display device as claimed in claim 1, characterized in that, The light-emitting adjustment module is a hydraulic transmission system, which includes a hydraulic misalignment layer and a misalignment pushing mechanism. The hydraulic misalignment layer is fixedly disposed on the light-emitting side of the flexible optical path layer, and one side of the hydraulic misalignment layer is mechanically connected to the misalignment pushing mechanism.

5. The display device as described in any one of claims 1 to 4, characterized in that, The flexible optical path layer includes: Backlight source layer; An optical path layer is disposed on the light-emitting side of the backlight source layer, and the optical path layer is provided with multiple conical optical structures formed by an exposure and development process; The liquid crystal layer has its lower surface fixedly disposed on the side of the optical path layer away from the backlight source layer, and its upper surface forms the light-emitting side of the flexible optical path layer. The liquid crystal layer is provided with pixel units corresponding to each of the conical optical structures.

6. A variable viewing angle control method, characterized in that, The variable viewing angle control method is applied to the display device according to any one of claims 1 to 5, and the variable viewing angle control method includes: The user's eye grayscale image is obtained through the human eye positioning module. The pupil center positioning point is determined based on the eye grayscale image. The light emission deflection angle of the display device is determined based on the line of sight deflection angle of the pupil center positioning point and the vertical distance from the pupil center positioning point to the effective display area. The light emission adjustment module adjusts the light emission direction angle of the flexible optical path layer to the light emission deflection angle.

7. The variable viewing angle control method as described in claim 6, characterized in that, The step of determining the pupil center location point based on the grayscale image of the eye includes: A binarized edge image is constructed based on the edge features of the grayscale image of the eye. Using a preset search radius, traverse each pixel on the binarized edge image and perform a circular region delineation operation to obtain the circular search region corresponding to each pixel; The center coordinates of the circular search area that intersects with the other circular search areas the most are determined as the pupil center location point.

8. The variable viewing angle control method as described in claim 6, characterized in that, When the light emission adjustment module is an electrorheological fluid control system, the step of driving the light emission adjustment module to adjust the light emission direction angle of the flexible optical path layer to the light emission deflection angle includes: Obtain the driving current signal corresponding to the light emission deflection angle, and apply the driving current signal to the electrorheological fluid layer in the electrorheological fluid control system to obtain the current dielectric constant of the electrorheological fluid layer; The target refractive index of the electrorheological fluid layer is determined based on the square root value of the current dielectric constant. Based on the target refractive index, the light propagation path of the flexible optical path layer through the electrorheological liquid layer is adjusted so that the light emission direction angle of the flexible optical path layer is consistent with the light emission deflection angle.

9. The variable viewing angle control method as described in claim 6, characterized in that, When the light emission adjustment module is a thermistor electronic control system, the step of driving the light emission adjustment module to adjust the light emission direction angle of the flexible optical path layer to the light emission deflection angle includes: Obtain the heating drive current corresponding to the light emission deflection angle, and apply the heating drive current to the thermal resistance layer in the thermistor control system; The thermal field energy is generated by the Joule heating effect of the thermal resistance layer, causing the thermal sensitive layer, which is fixedly connected to the thermal resistance layer, to deform and displace. The deformation displacement causes the thermal misalignment layer, which is fixedly connected to the thermal layer, to move by the deformation displacement, so as to adjust the light emission direction angle of the flexible optical path layer through the thermal misalignment layer to be consistent with the light emission deflection angle.

10. The variable viewing angle control method as described in claim 6, characterized in that, When the light emission adjustment module is a hydraulic transmission system, the hydraulic transmission system includes a hydraulic misalignment layer and a misalignment pushing mechanism. The misalignment pushing mechanism is mechanically connected to the hydraulic misalignment layer. The step of driving the light emission adjustment module to adjust the light emission direction angle of the flexible optical path layer to the light emission deflection angle includes: Obtain the hydraulic drive signal corresponding to the light emission deflection angle; In response to the hydraulic drive signal, the misalignment pushing mechanism is driven to move the hydraulic misalignment layer laterally, so as to adjust the light emission direction angle of the flexible optical path layer through the hydraulic misalignment layer to be consistent with the light emission deflection angle.

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