Vision matching display method and device of intelligent head-mounted equipment and intelligent head-mounted equipment

Abstract

The embodiment of the invention provides a diopter matching display method and device of intelligent head-mounted equipment and the intelligent head-mounted equipment. The intelligent head-mounted device comprises a zoom lens group. The zoom lens group comprises a first lens and a second lens. The diopter matching display method comprises the following steps: acquiring diopter information of a wearer; according to the diopter information of the wearer, at least one of the first lens and the second lens is controlled to slide in the direction perpendicular to the optical axis, and under the condition that the sliding distance is located at the set distance, the virtual image distance corresponding to the current sliding distance serves as the virtual image distance matched with the diopter information of the wearer.

Description

Technical Field

[0001] This application relates to the field of optical display technology, and more specifically, to a method for displaying a viewing angle of a smart head-mounted device, a device for displaying a viewing angle of a smart head-mounted device, a smart head-mounted device, and a computer-readable storage medium. Background Technology

[0002] With the rapid development of virtual reality (VR) technology, VR smart headsets are being used more and more widely. However, due to the different degrees of myopia / hyperopia in each person's eyes, traditional VR smart headsets struggle to provide accurate visual adaptation, affecting the user's wearing experience and comfort.

[0003] Currently, mainstream VR smart head-mounted devices on the market mainly match people with different vision by adding lenses with specific diopter or custom lenses. This method not only increases costs, but also makes it difficult to achieve accurate vision matching. Summary of the Invention

[0004] The purpose of this application is to provide a new technical solution for a vision matching display method for smart head-mounted devices.

[0005] Another objective of this application is to provide a vision-matching display device for a smart head-mounted device.

[0006] Another objective of this application is to provide a smart head-mounted device.

[0007] Another object of this application is to provide a computer-readable storage medium.

[0008] In a first aspect, embodiments of this application provide a method for viewing angle matching display of a smart head-mounted device, the smart head-mounted device including a zoom lens group, the zoom lens group including a first lens and a second lens;

[0009] The viewpoint matching display method includes:

[0010] Obtain the wearer's visual acuity information;

[0011] Based on the wearer's diopter information, at least one of the first lens and the second lens is controlled to slide in a direction perpendicular to the optical axis. When the sliding distance is within a set distance, the virtual image distance corresponding to the current sliding distance is taken as the virtual image distance that matches the wearer's diopter information.

[0012] Optionally, the zoom lens group is an Alvarez lens group.

[0013] Optionally, the first lens is located on the side away from the human eye, and the second lens is located on the side closer to the human eye;

[0014] The viewpoint matching display method includes:

[0015] Based on the wearer's vision information, the first lens is controlled to slide relative to the second lens in a direction perpendicular to the optical axis, and the movement range of the first lens is L1, 0≤L1≤12mm.

[0016] Optionally, the first lens is located on the side away from the human eye, and the second lens is located on the side closer to the human eye;

[0017] The viewpoint matching display method includes:

[0018] Based on the wearer's vision information, the first lens and the second lens are controlled to slide relative to each other in a direction perpendicular to the optical axis. The range of movement for both the first lens and the second lens is L0, where 0 ≤ L0 ≤ 6 mm.

[0019] Optionally, the zoom range of the Alvarez lens group is at least 6D.

[0020] Optionally, both the first lens and the second lens are freeform surface lenses;

[0021] or,

[0022] The first lens and the second lens are liquid crystal flat panels with different refractive indices.

[0023] Optionally, the smart head-mounted device includes an eye-tracking component;

[0024] The viewpoint matching display method further includes:

[0025] When the sliding distance is within a set distance, the eye movement information of the wearer tracked in real time by the eye-tracking component is obtained;

[0026] The eye movement drives at least one of the first and second lenses to slide in a direction perpendicular to the optical axis to adjust the focal length of the smart head-mounted device in real time.

[0027] Optionally, the smart head-mounted device includes a display component and an eye-tracking component;

[0028] The acquisition of the wearer's visual acuity includes:

[0029] The display component displays a vision test image; wherein the vision test image includes a first identifier or a second identifier of different sizes; wherein the first identifier has a different magnification.

[0030] When the wearer's eyes fixate on a clearly identifiable sign and the fixation time reaches a preset duration, the eye-tracking component tracks the position of the wearer's gaze point.

[0031] Identify the marker corresponding to the gaze point position of the wearer's eyes;

[0032] Based on the identified identifier and preset mapping data, the wearer's visual acuity information is determined; wherein, the mapping data reflects the correspondence between the visual acuity information and the identifier.

[0033] Optionally, the preset duration is T, where T ≥ 2s.

[0034] Optionally, the eye-tracking component includes an infrared light source and an infrared camera;

[0035] When the wearer's eyes fixate on a clearly identifiable marker for a preset duration, the eye-tracking component tracks the wearer's gaze point position, including:

[0036] When the wearer's eyes fixate on a clearly identifiable mark for a preset duration, infrared light is emitted into the wearer's eyes via the infrared light source.

[0037] The wearer's gaze point is determined by capturing the infrared light reflected from the wearer's eyes using the infrared camera.

[0038] Secondly, embodiments of this application provide a diopter matching display device for a smart head-mounted device, the smart head-mounted device including a zoom lens group, the zoom lens group including a first lens and a second lens;

[0039] The viewpoint matching display device includes:

[0040] The acquisition module is used to acquire the wearer's vision information;

[0041] The control module is used to control at least one of the first lens and the second lens to slide in a direction perpendicular to the optical axis according to the wearer's diopter information, and when the sliding distance is within a set distance, the virtual image distance corresponding to the current sliding distance is used as the virtual image distance that matches the diopter information.

[0042] Thirdly, embodiments of this application provide a smart head-mounted device, the smart head-mounted device comprising:

[0043] Memory is used to store executable computer instructions;

[0044] A processor, configured to execute the viewpoint matching display method according to the first aspect under the control of the executable computer instructions.

[0045] Fourthly, embodiments of this application provide a computer-readable storage medium having computer instructions stored thereon, which, when executed by a processor, perform the viewpoint matching display method as described in the first aspect.

[0046] The beneficial effects of this application are as follows:

[0047] According to embodiments of this application, a method for viewing angle matching display in a smart head-mounted device is provided. This method integrates the viewing angle adjustment characteristics of a zoom lens group, enabling the smart head-mounted device to achieve automatic viewing angle matching. This not only effectively reduces the high cost of traditional custom lens manufacturing but also ensures that every user can enjoy a clear and comfortable visual experience. Furthermore, the introduction of this method further enhances the intelligence level and human-computer interaction capabilities of the smart head-mounted device.

[0048] Other features and advantages of this specification will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0049] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of this specification and, together with their description, serve to explain the principles of this specification.

[0050] Figure 1 This is a schematic diagram of the hardware configuration of the smart head-mounted device according to an embodiment of this application;

[0051] Figure 2 This is a flowchart of the viewpoint matching display method for a smart head-mounted device according to an embodiment of this application;

[0052] Figure 3 This is a structural diagram and optical path diagram of an optical display system according to an embodiment of this application;

[0053] Figure 4 This is a schematic diagram of different working states of the Alvarez lens group according to an embodiment of this application;

[0054] Figure 5 This is a schematic block diagram of the vision matching display device of the smart head-mounted device according to an embodiment of this application;

[0055] Figure 6 This is a schematic block diagram of a smart head-mounted device according to an embodiment of this application.

[0056] Explanation of reference numerals in the attached figures:

[0057] 1. Display component; 2. Imaging component; 21. Convex lens; 22. Reflective polarizer; 23. Phase retarder; 24. Beam splitter; 3. Zoom lens group; 31. First lens; 32. Second lens; 4. Eye-tracking component; 41. Infrared light source; 42. Infrared camera; 01. Human eye;

[0058] 501. Acquisition module; 502. Control module;

[0059] 601. Memory; 602. Processor. Detailed Implementation

[0060] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0061] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0062] Technologies and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such technologies and equipment should be considered part of the specification.

[0063] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0064] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0065] The following description, in conjunction with the accompanying drawings, details the vision matching display method, apparatus, smart head-mounted device, and computer-readable storage medium for intelligent head-mounted devices provided in the embodiments of this application.

[0066] <Hardware Configuration>

[0067] Figure 1 This is a block diagram of the hardware configuration of a smart head-mounted device 1000 according to an embodiment of this application.

[0068] like Figure 1As shown, the smart head-mounted device 1000 can be a VR device, an AR (Augmented Reality) device, or an MR (Mixed Reality) device, etc. For example, the smart head-mounted device 1000 can be a VR head-mounted display or a smart glasses, etc. This application embodiment does not limit it in this way.

[0069] In one embodiment, such as Figure 1 As shown, the smart head-mounted device 1000 may include a processor 1100, a memory 1200, an interface device 1300, a communication device 1400, a display device 1500, an input device 1600, a microphone array 1700, and a speaker 1800. The processor 1100 may include, but is not limited to, a central processing unit (CPU) or a microprocessor (MCU). The memory 1200 may include, for example, ROM (Read-Only Memory), RAM (Random Access Memory), or non-volatile memory such as a hard disk. The interface device 1300 may include, for example, various bus interfaces, such as serial bus interfaces (including USB interfaces) and parallel bus interfaces. The communication device 1400 may be capable of wired or wireless communication. The display device 1500 may be, for example, a liquid crystal display (LCD), an LED display, or a touch screen. The input device 1600 may include, for example, a touchscreen, a keyboard, or a gamepad. The microphone array 1700 can be used to input voice information. The speaker 1800 can be used to output voice information.

[0070] In this embodiment, the memory 1200 of the smart head-mounted device 1000 is used to store instructions that control the processor 1100 to operate in order to implement or support the implementation of a control method for the smart head-mounted device according to any embodiment. Those skilled in the art can design instructions based on the schemes disclosed in this specification. How the instructions control the processor to operate is well known in the art and will not be described in detail here.

[0071] Those skilled in the art should understand that, although in Figure 1 The present specification shows a number of devices for a smart head-mounted device 1000. However, the smart head-mounted device 1000 of the embodiments described herein may involve only some of the devices, or may include other devices, which is not limited herein.

[0072] Figure 1 The smart head-mounted device 1000 shown is for illustrative purposes only and is by no means intended to limit this specification, its application, or its use.

[0073] In another embodiment, the smart head-mounted device 1000 includes at least one optical display system, see [link to documentation]. Figure 3Each optical display system includes a display component 1, an imaging component 2, and a zoom lens group 3 arranged sequentially along the same optical axis, and also includes an eye-tracking component 4, which is positioned on the side of the zoom lens group 3 closest to the human eye 01. The display component 1 is used to display an image; the imaging component 2 is used to form a virtual image from the image; the eye-tracking component 4, in conjunction with the display component 1, is used to acquire the wearer's visual acuity; the zoom lens group 3 includes a first lens 31 and a second lens 32 arranged adjacent to each other and spaced apart, and at least one of the first lens 31 and the second lens 32 can slide relative to each other in a direction perpendicular to the optical axis to adjust the virtual image distance of the optical display system, thereby adapting to the wearer's visual acuity.

[0074] It should be noted that, see Figure 3 In actual assembly, the second lens 32, which is closer to the human eye 01, can be fixed and placed on a lens holder, while the first lens 31, which is farther from the human eye 01, can be designed as a movable lens. This way, it is only necessary to control the first lens 31 to move up and down relative to the second lens 32 in a direction perpendicular to the optical axis. This implementation method is relatively simple and enables the smart head-mounted device to have a diopter matching function.

[0075] This embodiment does not limit the specific structure of the smart head-mounted device.

[0076] Hereinafter, various embodiments and examples according to this application will be described with reference to the accompanying drawings.

[0077] <Method Implementation>

[0078] Figure 2 This application illustrates a viewpoint matching display method for a smart head-mounted device according to an embodiment of the present application. This viewpoint matching display method for the smart head-mounted device can be, for example, by... Figure 1 The illustrated smart head-mounted device 1000 can be a VR head-mounted display, smart glasses, AR head-mounted display, etc.

[0079] The vision matching display method for a smart head-mounted device provided in this embodiment may include the following steps S2100 and S2200, see [link to previous section]. Figure 2 and Figure 3 .

[0080] Step 2100: Obtain the wearer's visual acuity information;

[0081] Step 2200: Based on the wearer's diopter information, control at least one of the first lens 31 and the second lens 32 to slide in a direction perpendicular to the optical axis. When the sliding distance is within a set distance, use the virtual image distance corresponding to the current sliding distance as the virtual image distance that matches the wearer's diopter information.

[0082] The vision matching display method for smart head-mounted devices provided in this application aims to improve the adaptability of smart head-mounted devices to users with different vision and the comfort of wearing them.

[0083] The vision matching display method for smart head-mounted devices provided in this application embodiment involves the smart head-mounted device initiating a vision detection process after the wearer puts on the device, thereby obtaining the wearer's vision information.

[0084] The core purpose of step 2200 above is to provide a virtual image distance that matches the wearer's visual acuity by adjusting the relative positions of the two lenses in the zoom lens group 3, based on the wearer's visual acuity information such as myopia or hyperopia.

[0085] In step 2200 above, at least one lens in the zoom lens group 3 is controlled to slide. Specifically, based on the wearer's diopter information obtained in step 2100, at least one of the first lens 31 and the second lens 32 is controlled to slide up and down in a direction perpendicular to the optical axis, thereby changing the distance (or relative position) between the two lenses. This sliding can be achieved by a mechanical device such as a motor or a manual adjustment mechanism.

[0086] In a specific example, to precisely and efficiently adjust the focal length of the zoom lens group 3 to match the visual acuity of different wearers' eyes, a high-speed linear motor can be used, that is, a high-speed linear motor can be used to control the relative movement of the first lens 31 and the second lens 32. Specifically, the selected high-speed linear motor should have the following characteristics:

[0087] (1) High-speed performance: The motor runs at a speed of at least 1m / s, which ensures a rapid response during the focus adjustment process, allowing the wearer to experience a clear visual experience in a short time.

[0088] (2) High-precision positioning: The total stroke range of the motor is designed to be, for example, 12mm, which precisely corresponds to the adjustment range of the zoom lens group 3 diopter.

[0089] In addition, the high-speed linear motor should be accurate to 0.1mm, which means that for every tiny distance moved, the visual acuity can be precisely changed by 0.05D, thus realizing the fine-tuning function and ensuring that each wearer can obtain the most suitable visual clarity.

[0090] In addition to speed and accuracy, the motor's response time needs to be on the order of milliseconds. This ensures that the optical display system can make instantaneous adjustments when it detects changes in the wearer's eye movement or diopter, providing lag-free visual feedback.

[0091] The diopter matching display method provided in this application can continuously monitor the sliding distance of the two lenses during the sliding process of the first lens 31 and the second lens 32, so as to ensure that the sliding distance reaches or approaches the set distance.

[0092] According to step 2200, when the sliding distance reaches or is at a set distance, the virtual image distance corresponding to that sliding distance is considered as the virtual image distance that matches the wearer's visual acuity information. This virtual image distance is the position where the wearer can clearly see the image.

[0093] Regarding the zoom lens group 3 in this embodiment, at least one lens can slide in a direction perpendicular to the optical axis, thereby changing the relative position of the two lenses. This changes the focal point of the light passing through the zoom lens group 3, thus achieving a change in focal length. This change in focal length is continuous, and the virtual image distance can be finely adjusted by precisely controlling the sliding distance of the lenses in the zoom lens group 3 to adapt to the visual acuity needs of different wearers.

[0094] Therefore, step 2200 of this application is a key step designed to adapt the lens position to the wearer's individual visual needs by dynamically adjusting the lens position. This step achieves automatic adjustment and matching of diopter.

[0095] According to an embodiment of this application, a method for viewing angle matching display in a smart head-mounted device is provided. This method integrates the viewing angle adjustment characteristics of the zoom lens group 3, enabling the smart head-mounted device to achieve automatic viewing angle matching. This not only effectively reduces the high cost of traditional lens customization but also ensures that every user can enjoy a clear and comfortable visual experience. Furthermore, the introduction of this method further enhances the intelligence level and human-computer interaction capabilities of the smart head-mounted device.

[0096] In some examples of this application, the zoom lens group 3 is an Alvarez lens group.

[0097] See Figure 3 The Alvarez lens group can achieve a wide range of zoom by sliding the first lens 31 (located on the side away from the human eye 01) and the second lens 32 (located on the side closer to the human eye 01) in a direction perpendicular to the optical axis. This zoom capability significantly improves the universality and user experience of smart head-mounted devices.

[0098] The Alvarez lens group in this application can dynamically adjust the virtual image distance by controlling the lens sliding distance based on the wearer's diopter information, thereby matching the wearer's diopter. This dynamic adjustment capability ensures that the wearer can obtain a clear and comfortable visual experience under different visual needs.

[0099] Compared to traditional custom lens methods, the Alvarez lens group achieves diopter matching through dynamic adjustment rather than static customization, which greatly reduces production costs.

[0100] See some examples in this application. Figure 3 The first lens 31 is located on the side away from the human eye 01, and the second lens 32 is located on the side closer to the human eye 01;

[0101] The vision matching display method includes: controlling the first lens 31 to slide relative to the second lens 32 in a direction perpendicular to the optical axis according to the wearer's vision information, wherein the movement range of the first lens 31 is L1, 0≤L1≤12mm.

[0102] In this example of the application, the first lens 31 (located on the side furthest from the human eye 01) is designed to slide relative to the second lens 32 (located on the side closer to the human eye 01) in a direction perpendicular to the optical axis. The vertical movement range of the first lens 31 is L1, and L1 is designed to be 0 ≤ L1 ≤ 12 mm. It should be noted that the 12 mm movement range here actually refers to the maximum distance that the movable lens, i.e., the first lens 31, can move vertically in a direction perpendicular to the optical axis. However, since the first lens 31 moves symmetrically, the actual effective distance for adjusting the focal length is 6 mm vertically and horizontally relative to the optical axis. The movement range design in this example of the application ensures that the zoom lens group 3 has a large zoom range to accommodate the visual acuity needs of most wearers.

[0103] By controlling the movement of the first lens 31 within the aforementioned example design range, the smart head-mounted device can dynamically adjust the focal length based on the wearer's diopter information, thereby achieving a virtual image distance that matches the wearer's eye diopter. This dynamic adaptation not only improves wearing comfort but also ensures clear image presentation under different diopters.

[0104] Compared to traditional custom-made lenses, the method of achieving diopter matching through the dynamic adjustment of the zoom lens group 3 significantly reduces production costs. Manufacturers no longer need to customize lenses for each user; instead, they can meet the diopter needs of different users with a single universal zoom lens group, thereby improving production efficiency and reducing maintenance costs.

[0105] It should be noted that designing the zoom lens group 3 to adjust the focal length solely by moving the first lens 31 helps to keep the structure of the smart head-mounted device simple. This design reduces the need for additional mechanical parts, making the entire head-mounted device lighter and easier to wear.

[0106] See some examples in this application. Figure 3 The first lens 31 is located on the side away from the human eye 01, and the second lens 32 is located on the side closer to the human eye 01;

[0107] The vision matching display method includes: controlling the first lens 31 and the second lens 32 to slide relative to each other in a direction perpendicular to the optical axis according to the wearer's vision information, wherein the movement range of the first lens 31 and the second lens 32 is L0, 0≤L0≤6mm.

[0108] According to this example of the present application, the zoom lens group 3 employs a dual-lens cooperative movement adjustment scheme. Each lens in the zoom lens group 3 has a movement range of L0, and L0 is set to 0 ≤ L0 ≤ 6 mm. This means that each of the two lenses has an adjustment space of 6 mm in the direction perpendicular to the optical axis. Furthermore, each lens can move vertically by 3 mm.

[0109] In the zoom lens group 3, by simultaneously controlling the movement of two lenses, the smart head-mounted device can respond more quickly to changes in the wearer's diopter and adjust the focal length more accurately to match the wearer's diopter. This dynamic adaptability ensures that the wearer can obtain a clear and comfortable visual experience in different usage scenarios.

[0110] In some examples of this application, the zoom range of the Alvarez lens group is at least 6D.

[0111] See Figure 3 The zoom lens group 3 is an Alvarez lens group, which includes a first lens 31 and a second lens 32 arranged along the same optical axis. By controlling the first lens 31 and / or the second lens 32 to slide relative to each other in a direction perpendicular to the optical axis, the zoom range of the zoom lens group 3 is at least 6D, which corresponds to the sliding distance of the movable lens in the two examples above.

[0112] In this example of the application, the statement about the zoom range covering at least 6D can be interpreted as: it can achieve zoom from -6D to 0D or zoom from -3D to 3D, etc.

[0113] By driving the two lenses to slide relative to each other in a direction perpendicular to the optical axis, the Alvarez lens group can achieve a zoom range of at least 6D. This wide zoom range enables smart head-mounted devices to be suitable for a wide range of users, from high myopia to low hyperopia, greatly improving the universality and user experience of smart head-mounted devices.

[0114] The focusing principle of the zoom lens group 3 is explained in detail below:

[0115] The zoom lens group 3 achieves focal length variation by moving two lenses, namely the first lens 31 and the second lens 32, relative to each other in a direction perpendicular to the optical axis. During the sliding process, these two lenses change the refraction path of light passing through the lens group, thereby changing the virtual image distance of the smart head-mounted device.

[0116] See Figure 4 , Figure 4 The image shows three figures (a), (b), and (c). Figure (a) shows the original state of the two lenses in the zoom lens group 3, which are arranged adjacent to each other along the same optical axis without any slippage between them. Figure 4 Figures (b) and (c) show that the focal length of the zoom lens group 3 changes accordingly when the relative positions of the two lenses change. Figure (b) shows that the focal length of the zoom lens group 3 shortens, causing the image position to shift forward (i.e., the virtual image distance to shorten), corresponding to a positive focal length, which is suitable for people with myopia. Figure (c) shows that the focal length of the zoom lens group 3 lengthens, causing the image position to shift backward (i.e., the virtual image distance to lengthen), corresponding to a negative focal length, which is suitable for people with hyperopia.

[0117] It should be noted that the vision matching display method provided in this application embodiment can not only adjust myopia, but also adjust hyperopia, and is applicable to a wider range of people.

[0118] In some examples of this application, the first lens 31 and the second lens 32 are both freeform lenses; or, the first lens 31 and the second lens 32 are liquid crystal flat panels with different refractive indices.

[0119] According to this example of the present application, the two lenses included in the zoom lens group 3 can both be freeform lenses. Compared with traditional spherical or aspherical lenses, freeform lenses have a higher degree of design freedom and can achieve more complex optical performance. Specifically, the surface shape of a freeform lens is no longer a simple sphere or a rotationally symmetric aspherical surface, but a complex curved surface that can be freely designed according to specific needs. This design gives freeform lenses significant advantages in correcting aberrations, expanding the field of view, and improving image quality.

[0120] In this example of the application, using a freeform lens as the lens element of the zoom lens group 3 offers several advantages. For instance, the complex curved shape of the freeform lens can better correct various aberrations during the imaging process, thereby improving image quality. Because freeform lenses offer greater design freedom, zoom lens group 3 with a wider zoom range can be designed to meet the broader visual acuity needs of different wearers. In summary, freeform lenses provide greater flexibility in adjusting the virtual image distance, better adapting to the eye parameters and visual conditions of different wearers. This adaptability contributes to improved wearing comfort and visual experience.

[0121] In this example of the application, the zoom lens group 3 can also be designed to include two liquid crystal panels with different refractive indices as a first lens 31 and a second lens 32. Because the two liquid crystal panels have different refractive indices, diopter adjustment can be achieved during their relative movement.

[0122] Among them, LCD flat panels have a significant advantage in thickness, which helps to achieve a more compact and lighter optical display system design.

[0123] According to the example provided in this application, the zoom lens group 3 uses a thin and light liquid crystal panel, which makes the design of the zoom lens group 3 more compact. This helps to reduce the overall size and weight of the entire optical display module and the virtual reality smart head-mounted device that uses the optical display module, thereby improving wearing comfort.

[0124] In another scenario, the zoom lens group 3 can be an electrically controlled liquid crystal lens for adjusting diopter. In this case, by applying voltage to control the arrangement of liquid crystal molecules, the refraction path of light can be changed, thereby adjusting the focal length and thus regulating the diopter of the wearer's eyes.

[0125] In some examples of this application, the smart head-mounted device includes an eye-tracking component 4;

[0126] The viewpoint matching display method further includes the following steps 2300 and 2400:

[0127] Step 2300: When the sliding distance is at a set distance, the wearer's eye movement information is obtained in real time by the eye-tracking component 4.

[0128] Step 2400: Drive at least one of the first lens 31 and the second lens 32 to slide in a direction perpendicular to the optical axis according to the eye movement, so as to adjust the focal length of the smart head-mounted device in real time.

[0129] In this example of the application, the eye-tracking component 4 participates in real-time tracking of the wearer's eye movements. This functionality is crucial for enabling real-time focus adjustment, as it provides immediate feedback on the wearer's current visual focus.

[0130] After the virtual image distance of the smart head-mounted device is adjusted to match the visual acuity of the wearer's eyes, the eye-tracking component 4 can track the wearer's eye movement information in real time.

[0131] Specifically, when the wearer's eye movement changes (for example, from observing a near object to a distant object), the eye-tracking component captures this change and feeds back the real-time eye movement information to the control component. At this time, the control component quickly calculates the new focal length requirement based on the real-time eye movement information and controls the driving component to drive the two lenses in the Alvarez lens group to make fine adjustments, so as to adjust the focal length of the optical display system in real time and ensure that the wearer can always see a clear image.

[0132] It should be noted that VAC (Vergence-Accommodation Conflict) is a significant issue in the fields of virtual reality (VR) and augmented reality (AR). It primarily refers to the visual discomfort and dizziness experienced by users when wearing VR / AR devices due to a mismatch between their vergence and accommodation mechanisms. The example provided in this application effectively addresses the VAC problem, ensuring the accuracy and reliability of smart head-mounted devices in real-time tracking of the wearer's eye movements and dynamic focus adjustment.

[0133] In some examples of this application, the smart head-mounted device includes a display component 1 and an eye-tracking component 4; step 2100, i.e., the method for obtaining the wearer's visual acuity, may include the following steps 100 to 400:

[0134] Step 100: Display a vision test image through the display component 1; wherein the vision test image includes a first identifier or a second identifier of different sizes; wherein the first identifier has a different magnification.

[0135] Step 200: When the wearer's eyes fixate on a clearly identifiable sign and the fixation time reaches a preset duration, the eye-tracking component 4 tracks the fixation point position of the wearer's eyes.

[0136] Step 300: Identify the marker corresponding to the gaze point position of the wearer's eyes;

[0137] Step 400: Determine the wearer's visual acuity information based on the identified identifier and preset mapping data; wherein the mapping data reflects the correspondence between the visual acuity information and the identifier.

[0138] It should be noted that the vision measurement conditions for the wearer's eyes are as follows: when measuring the wearer's left eye vision, the right eye sees, for example, a black image, meaning the right eye is not measured. Conversely, when measuring the wearer's right eye vision, the left eye sees, for example, a black image, meaning the left eye is not measured. In other words, only one eye of the wearer is measured at a time, and the vision of both eyes is obtained after both eyes have been measured.

[0139] According to step 100 above, a vision test image can be displayed on the display component 1. The vision test image may contain, for example, second symbols of different sizes (such as letters E of different sizes), where each symbol corresponds to a specific degree of visual acuity (i.e., different sizes of symbols correspond to different degrees of visual acuity). This design allows users to select symbols that they can clearly recognize based on their own vision, and determine their degree of visual acuity, such as myopia, or possibly hyperopia, based on the size of the symbol.

[0140] Of course, the marker on the vision test image can also be a marker with adjustable magnification, i.e., a first marker. In this case, different magnifications represent different degrees of visual acuity. Thus, the user's visual acuity information can also be obtained by detecting the size of a clearly identifiable marker.

[0141] Step 100 of this application is designed to guide users in performing vision self-tests in a visual manner, simplifying the complex process of traditional vision testing. Specifically, by utilizing markers of different sizes in the vision test image to correspond to different degrees of visual acuity, visual acuity can be quickly determined, laying the foundation for subsequent precise adjustment of the virtual image distance of the smart head-mounted device.

[0142] According to steps 200 and 300 above: the eye-tracking component 4 is used to obtain the gaze point position of the wearer's eyes, thereby enabling accurate identification of the symbol being gazed at. This step is a key bridge connecting user selection and the response of the smart head-mounted device.

[0143] The eye-tracking technology provides high-precision eye position tracking, ensuring the accuracy of the wearer's (i.e., user's) gaze point identification. This allows the smart head-mounted device to instantly acquire the wearer's gaze behavior, providing data support for subsequent vision calculation and adjustment.

[0144] In a specific example, the display on the display component 1 of the smart head-mounted device can guide the wearer to gaze and select a clearly identifiable marker of a specific size within the vision test image. At this time, the eye-tracking component 4 can acquire the wearer's gaze point position and identify the clearly identifiable marker selected. This process automates the detection of myopia / hyperopia, providing crucial data for subsequent adjustments to the virtual image distance of the smart head-mounted device.

[0145] According to step 400 above, the wearer's visual acuity information is determined based on the identified identifier and preset mapping data; wherein, the mapping data reflects the correspondence between visual acuity information and the identifier. Specifically, the smart head-mounted device can automatically find and determine the visual acuity corresponding to the identifier identified in step 300. This step is crucial for converting the user's selection into a specific visual acuity value.

[0146] In a specific example, by using preset mapping data, the smart head-mounted device can automatically convert visual symbols into visual acuity values. This preset mapping data can be set within the processing or computing module of the smart head-mounted device.

[0147] In some examples of this application, the preset duration is T, where T≥2s.

[0148] Choosing 2 seconds as the minimum preset duration is primarily to ensure that the eye-tracking component 4 can stably and accurately capture the wearer's gaze point position. Shorter gaze durations may lead to misjudgments due to minor eye movements or accidental operations by the user, while gaze durations of 2 seconds or more can effectively improve detection accuracy.

[0149] From the wearer's perspective, a 2-second gaze time will not cause the wearer too much burden or discomfort, while also giving the wearer enough time to clearly identify and select the mark that they can see clearly.

[0150] Although the minimum duration is set to 2 seconds, this value can be adjusted according to specific needs in practical applications. For example, to further improve detection accuracy, the preset duration can be extended to 3 seconds or longer. However, an excessively long preset duration may degrade the user experience, so a balance needs to be found between accuracy and user experience.

[0151] In some examples of this application, the eye-tracking component 4 includes an infrared light source 41 and an infrared camera 42;

[0152] When the wearer's eyes fixate on a clearly identifiable marker for a preset duration, the eye-tracking component tracks the wearer's gaze point position, including:

[0153] When the wearer's eyes fixate on a clearly identifiable mark and the fixation time reaches the preset duration, infrared light is emitted into the wearer's eyes through the infrared light source 41;

[0154] The infrared light reflected from the wearer's eyes, captured by the infrared camera 42, determines the position of the wearer's gaze point.

[0155] The composition and function of the eye-tracking component 4 are described in this example of the application.

[0156] When the wearer's eyes fixate on a clearly identifiable marker for a preset duration (e.g., T≥2s), the infrared light source 41 can be controlled to emit infrared light towards the wearer's eyes. This step aims to utilize the characteristics of infrared light to enhance the accuracy and stability of eye tracking. Infrared light is less susceptible to ambient light interference, allowing for a clearer reflection of the wearer's eye movements. Furthermore, infrared light is less easily perceived by the human eye, thus minimizing its impact on the user's visual experience.

[0157] The infrared camera 42 then captures infrared light reflected from the wearer's eyes. Using image processing techniques, for example, the infrared camera 42 can analyze the distribution and changes in these reflected rays to determine the wearer's gaze point. Simultaneously, the smart head-mounted device identifies which marker on the vision test image the wearer is looking at based on the gaze point location.

[0158] In this application, using an infrared light source 41 (e.g., an infrared LED) and an infrared camera 42 for eye tracking can effectively reduce the interference of ambient light on the tracking process and improve the accuracy and stability of tracking. The characteristics of infrared light enable it to more clearly reflect the minute movements of the eyeball, thereby improving the accuracy of visual acuity detection.

[0159] It should be noted that eye-tracking technology is not only applicable to the automatic vision matching display system in virtual reality smart head-mounted devices, but can also be extended to other fields that require high-precision eye tracking, such as automatic IPD adjustment and human-computer interaction.

[0160] The following is a detailed description of the process for testing the wearer's vision using a specific example.

[0161] First, the wearer is asked to select a sign that they can clearly recognize from the vision test image (such as the smallest letter E that they can see) and keep looking at the sign; this step is an active process for the wearer to participate in, reflecting their vision status by looking at a specific sign.

[0162] Next, the gaze point position is tracked: when the wearer selects and continuously gazes at the selected icon for more than 2 seconds, the gaze point position of the wearer's eyes is tracked by the eye-tracking component 4; this step utilizes eye-tracking technology, which can accurately capture the wearer's gaze direction.

[0163] After the eye-tracking component 4 tracks the gaze point, the smart head-mounted device further identifies the marker the wearer is looking at. This step accurately determines which marker the wearer is looking at.

[0164] This application utilizes eye-tracking technology to identify the markers the wearer is looking at, accurately determining the wearer's visual acuity and adjusting the focal length of the zoom lens group 3 accordingly, thereby adjusting the virtual image distance of the optical display system. This automatic matching method is more precise and efficient than traditional manual adjustment or custom-made lenses.

[0165] The technical solution provided in this application can be applied to, for example, virtual reality smart head-mounted devices, to adapt to users with different degrees of myopia / hyperopia by automatically adjusting the diopter. This not only improves the adaptability of the device but also maintains its portability, meeting consumers' high demands for virtual reality smart head-mounted devices.

[0166] Compared to traditional methods of attaching specific prescription lenses for myopia / hyperopia or using custom-made lenses, the technical solution of this application reduces costs by automatically matching the prescription. This is because there is no need to prepare individual lenses for each user; instead, an adjustable lens system can meet the needs of different users.

[0167] This application combines eye-tracking technology and Alvarez zoom lenses to achieve automatic matching and adjustment of myopia / hyperopia in virtual reality smart head-mounted devices, which has significant technical effects such as improving user experience, accurately matching vision, enhancing adaptability and portability, and reducing costs.

[0168] See Figure 3 The intelligent head-mounted device further includes an imaging component 2. The display component 1, the imaging component 2, and the zoom lens group 3 are arranged sequentially along the same optical axis, and the eye-tracking component 4 is located on the side of the zoom lens group 3 away from the display component 1. When the virtual image distance of the intelligent head-mounted device matches the wearer's visual acuity, the display component 1 displays the image and emits imaging light rays. These imaging light rays pass through the imaging component 2 and the zoom lens group 3 and enter the human eye to form an image. This is the specific imaging process.

[0169] The imaging light entering the human eye 01 after passing through the imaging component 3 and the zoom lens group 3 will have higher imaging quality, providing users with a clear visual experience.

[0170] Because the eye-tracking component 4 is positioned near the eye on the zoom lens group 3, it can more accurately obtain the wearer's gaze point. This high-precision eye-tracking capability enables the optical display system to quickly respond to the wearer's visual needs and adjust the diopter accordingly. Simultaneously, due to the optimization of the entire optical path and component layout, users will experience a smoother and more natural visual experience.

[0171] In the smart head-mounted device, the imaging component 2 can be a folded optical path lens module or a Fresnel lens group.

[0172] In one specific example of this application, in the smart head-mounted device, the zoom lens group 3 is paired with the folded optical path lens module (imaging component 2).

[0173] The zoom lens group 3 can be used in combination with a single aspherical folded optical path lens module, see [link / reference]. Figure 3 .

[0174] Of course, in addition to a single-piece design, the folded optical path lens module can also be a combination of two or three aspherical lenses, which is beneficial to improving image quality.

[0175] In addition, to achieve better optical performance, the lens group in the folded optical path lens module can also adopt a multi-lens cemented design, which can be used to improve image quality, eliminate color, and reduce light energy loss.

[0176] When the imaging component 2 is a folded optical path lens module, see [link / reference]. Figure 3 The imaging assembly 2 includes not only a lens, but also a reflective polarizer 22, a phase retarder 23, and a beam splitter 24. The arrangement of these elements is specifically designed so that the phase retarder 23 is located between the reflective polarizer 22 and the beam splitter 24. The main function of this design is to form a folded optical path.

[0177] By employing a folded optical path design, image quality can be maintained while reducing the size of the smart head-mounted device. This is especially important for smart head-mounted devices that require controlled size and weight. A lighter and more compact smart head-mounted device improves comfort during extended wear.

[0178] See a specific example in this application. Figure 3 The imaging component 2 includes a convex lens 21; the reflective polarizer 22 is a polarizing reflective film, and the reflective polarizer 22 is disposed on the surface of the convex lens 21 away from the display component 1; the phase delay 23 is a quarter wave plate, and the beam splitter 24 is a semi-transparent and semi-reflective film. The phase delay 23 and the beam splitter 24 are stacked and disposed together on the surface of the convex lens 21 close to the display component 1.

[0179] The convex lens 21 serves as the main body of the imaging component 2, and is responsible for converging and magnifying the image light from the display component 1.

[0180] Among them, the reflective polarizer 22, such as the polarizing reflective film, can be directly attached to the surface of the convex lens 21 away from the display component 1, and can selectively reflect light with a specific polarization direction.

[0181] The phase delayer 23, such as a quarter-wave plate, and the beam splitter 24, such as a semi-transparent and semi-reflective film, are stacked on the surface of the convex lens 21 near the display assembly 1. The quarter-wave plate, by introducing a phase difference of π / 2, converts linearly polarized light into circularly polarized light, or vice versa. This helps reduce light loss during interface reflection and improves image clarity. The semi-transparent and semi-reflective film can transmit a portion of light while simultaneously reflecting a portion. Combined with the quarter-wave plate and the aforementioned polarizing reflective film, it can form a folded optical path, allowing light to be refracted multiple times within the convex lens 21.

[0182] In one specific example of this application, the zoom lens group 3 can also be combined with the Fresnel lens group (imaging component 2) in the smart head-mounted device.

[0183] Fresnel lens groups support a large field of view (FOV), which is crucial for VR visual experiences. A larger FOV allows users to experience a more immersive virtual environment, enhancing the overall entertainment and interactive experience.

[0184] <Device Embodiment>

[0185] Figure 5 This is a structural schematic diagram of a vision matching display device for a smart head-mounted device according to one embodiment.

[0186] See Figure 3 The smart head-mounted device includes a zoom lens group 3, which comprises a first lens 31 and a second lens 32. (See also...) Figure 5 The vision matching display device of the smart head-mounted device includes an acquisition module 501 and a control module 502.

[0187] The acquisition module 501 is used to acquire the wearer's vision information;

[0188] The control module 502 is used to control at least one of the first lens 31 and the second lens 32 to slide in a direction perpendicular to the optical axis according to the wearer's diopter information. When the sliding distance is within a set distance, the virtual image distance corresponding to the current sliding distance is used as the virtual image distance that matches the diopter information.

[0189] According to an embodiment of this application, a diopter matching display device for a smart head-mounted device is provided. This device integrates the diopter adjustment characteristics of a zoom lens group, enabling the smart head-mounted device to achieve automatic diopter matching. This not only effectively reduces the high cost of traditional lens customization but also ensures that every user can enjoy a clear and comfortable visual experience. Furthermore, the introduction of this device further enhances the intelligence level and human-computer interaction capabilities of the smart head-mounted device.

[0190] <Equipment Example>

[0191] Figure 6 This is a schematic diagram of the hardware structure of a smart head-mounted device according to one embodiment. Figure 6 As shown, the smart head-mounted device includes a memory 601 and a processor 602.

[0192] The memory 601 can be used to store executable computer instructions.

[0193] The processor 602 can be used to execute the vision matching display method for a smart head-mounted device according to the method embodiments of this application, under the control of the executable computer instructions.

[0194] The smart head-mounted device can be as follows: Figure 1 The smart head-mounted device 1000 shown can also be a device with other hardware structures, which are not limited here.

[0195] The smart head-mounted device may be, for example, a VR device, an AR device, or a MR device, and this application does not limit it to any particular type.

[0196] In another embodiment, the smart head-mounted device may include the vision-matching display device of the above-described smart head-mounted device.

[0197] In one embodiment, each module of the vision matching display device of the above-mentioned smart head-mounted device can be implemented by the processor 602 running computer instructions stored in the memory 601.

[0198] The smart head-mounted device provided in the embodiments of this application integrates the diopter adjustment characteristics of a zoom lens group, enabling the smart head-mounted device to achieve the function of automatic diopter matching. This not only effectively reduces the high cost of traditional lens customization, but also ensures that every user can enjoy a clear and comfortable visual experience.

[0199] Computer-readable storage media

[0200] This application also provides a computer-readable storage medium storing computer instructions thereon, which, when executed by a processor, perform the vision matching display method for a smart head-mounted device provided in this application.

[0201] This application may be a system, method, and / or computer program product. A computer program product may include a computer-readable storage medium having computer-readable program instructions loaded thereon for causing a processor to implement various aspects of this application.

[0202] A computer-readable storage medium can be a tangible device capable of holding and storing instructions used by an instruction execution device. For example, a computer-readable storage medium can be... ―― But not limited to ―― Electrical storage devices, magnetic storage devices, optical storage devices, electromagnetic storage devices, semiconductor storage devices, or any suitable combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static random access memory (SRAM), portable compact disc read-only memory (CD-ROM), digital multifunction disc (DVD), memory sticks, floppy disks, mechanical encoding devices, such as punch cards or recessed protrusions storing instructions thereon, and any suitable combination thereof. The computer-readable storage media as used herein is not to be construed as transient signals themselves, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (e.g., light pulses through fiber optic cables), or electrical signals transmitted through wires.

[0203] The computer-readable program instructions described herein can be downloaded from computer-readable storage media to various computing / processing devices, or downloaded via a network, such as the Internet, local area network, wide area network, and / or wireless network, to an external computer or external storage device. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and / or edge servers. A network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards them to the computer-readable storage media in the respective computing / processing device.

[0204] The computer program instructions used to perform the operations of this application may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, etc., and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The computer-readable program instructions may be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or may be connected to an external computer (e.g., via the Internet using an Internet service provider). In some embodiments, electronic circuits, such as programmable logic circuits, field-programmable gate arrays (FPGAs), or programmable logic arrays (PLAs), are personalized by utilizing state information from the computer-readable program instructions. These electronic circuits can execute the computer-readable program instructions to implement various aspects of this application.

[0205] Various aspects of this application are described herein with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer-readable program instructions.

[0206] These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that, when executed by the processor of the computer or other programmable data processing apparatus, they create means for implementing the functions / actions specified in one or more blocks of the flowchart and / or block diagram. These computer-readable program instructions can also be stored in a computer-readable storage medium that causes a computer, programmable data processing apparatus, and / or other device to operate in a particular manner; thus, the computer-readable medium storing the instructions comprises an article of manufacture that includes instructions for implementing aspects of the functions / actions specified in one or more blocks of the flowchart and / or block diagram.

[0207] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device to cause a series of operational steps to be performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the instructions executed on the computer, other programmable data processing apparatus, or other device to perform the functions / actions specified in one or more boxes of a flowchart and / or block diagram.

[0208] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of an instruction containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions. It will be well known to those skilled in the art that implementation in hardware, implementation in software, and implementation using a combination of software and hardware are equivalent.

[0209] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technological improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this application is defined by the appended claims.

Claims

1. A method for viewing angle matching display in a smart head-mounted device, characterized in that, The smart head-mounted device includes a zoom lens group (3), which includes a first lens (31) and a second lens (32); The viewpoint matching display method includes: Obtain the wearer's visual acuity information; Based on the wearer's diopter information, at least one of the first lens (31) and the second lens (32) is controlled to slide in a direction perpendicular to the optical axis. When the sliding distance is within a set distance, the virtual image distance corresponding to the current sliding distance is taken as the virtual image distance that matches the wearer's diopter information.

2. The viewing angle matching display method according to claim 1, characterized in that, The zoom lens group (3) is the Alvarez lens group.

3. The viewing angle matching display method according to claim 2, characterized in that, The first lens (31) is located on the side away from the human eye (01), and the second lens (32) is located on the side closer to the human eye (01); The viewpoint matching display method includes: Based on the wearer's vision information, the first lens (31) is controlled to slide relative to the second lens (32) in a direction perpendicular to the optical axis, and the movement range of the first lens (31) is L1, 0≤L1≤12mm.

4. The viewing angle matching display method according to claim 2, characterized in that, The first lens (31) is located on the side away from the human eye (01), and the second lens (32) is located on the side closer to the human eye (01); The viewpoint matching display method includes: Based on the wearer's vision information, the first lens (31) and the second lens (32) are controlled to slide relative to each other in a direction perpendicular to the optical axis. The movement range of the first lens (31) and the second lens (32) is L0, where 0≤L0≤6mm.

5. The viewing angle matching display method according to claim 3 or 4, characterized in that, The zoom range of the Alvarez lens group is at least 6D.

6. The viewing angle matching display method according to claim 2, characterized in that, Both the first lens (31) and the second lens (32) are freeform surface lenses; or, The first lens (31) and the second lens (32) are liquid crystal flat panels with different refractive indices.

7. The viewing angle matching display method according to claim 1, characterized in that, The smart head-mounted device includes an eye-tracking component (4); The viewpoint matching display method further includes: When the sliding distance is within a set distance, the eye movement information of the wearer tracked in real time by the eye tracking component (4) is obtained; The eye movement drives at least one of the first lens (31) and the second lens (32) to slide in a direction perpendicular to the optical axis to adjust the focal length of the smart head-mounted device in real time.

8. The viewing angle matching display method according to claim 1, characterized in that, The smart head-mounted device includes a display component (1) and an eye-tracking component (4); The acquisition of the wearer's visual acuity includes: The visual acuity test image is displayed by the display component (1); wherein the visual acuity test image includes a first identifier or a second identifier of different sizes; wherein the first identifier has a different magnification. When the wearer's eyes fixate on a clearly identifiable sign and the fixation time reaches a preset duration, the eye-tracking component (4) tracks the fixation point of the wearer's eyes. Identify the marker corresponding to the gaze point position of the wearer's eyes; Based on the identified identifier and preset mapping data, the wearer's visual acuity information is determined; wherein, the mapping data reflects the correspondence between the visual acuity information and the identifier.

9. The viewing angle matching display method according to claim 8, characterized in that, The preset duration is T, where T ≥ 2s.

10. The viewing angle matching display method according to claim 8, characterized in that, The eye-tracking component (4) includes an infrared light source (41) and an infrared camera (42); When the wearer's eyes fixate on a clearly identifiable marker for a preset duration, the eye-tracking component tracks the wearer's gaze point position, including: When the wearer's eyes fixate on a clearly identifiable sign and the fixation time reaches the preset duration, infrared light is emitted into the wearer's eyes through the infrared light source (41); The position of the wearer's gaze point is determined by the infrared light reflected from the wearer's eyes captured by the infrared camera (42).

11. A vision-matching display device for a smart head-mounted device, characterized in that, The smart head-mounted device includes a zoom lens group (3), which includes a first lens (31) and a second lens (32); The viewpoint matching display device includes: The acquisition module (501) is used to acquire the wearer's vision information; The control module (502) is used to control at least one of the first lens (31) and the second lens (32) to slide in a direction perpendicular to the optical axis according to the wearer's diopter information, and when the sliding distance is within a set distance, the virtual image distance corresponding to the current sliding distance is used as the virtual image distance that matches the diopter information.

12. A smart head-mounted device, characterized in that, include: Memory (601) for storing executable computer instructions; A processor (602) is configured to execute the viewpoint matching display method according to any one of claims 1-10, under the control of the executable computer instructions.

13. A computer-readable storage medium, characterized in that, It stores computer instructions, which, when executed by a processor, perform the viewpoint matching display method according to any one of claims 1-10.

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