Adjustment method of waveguide display system, waveguide display system and observation equipment

Abstract

The invention discloses an adjusting method of a waveguide display system, the waveguide display system and observation equipment, belongs to the technical field of optical display, and mainly aims at improving the binocular image combination effect, reducing the problems of ghosting, blurring and the like caused by mismatching of the optical center distance of the waveguide display system and the pupil distance of a user and improving the user experience. And a clear and stable visual picture is presented for a user. According to the main technical scheme, the adjustment method of the waveguide display system comprises the following steps: collecting pupil distance information of a user; comparing the user interpupillary distance information with optical center distance information of a waveguide display system, and generating an adjustment instruction according to a comparison result; and in response to the adjustment instruction, controlling the working state of the waveguide display system.

Description

Technical Field

[0001] This application belongs to the technical field of optical display, and particularly relates to an adjustment method for a waveguide display system, a waveguide display system, and an observation device. Background Art

[0002] With the rapid development of technology, waveguide display systems have been widely used in many fields, such as augmented reality (AR) devices, binocular night vision devices, etc. However, most existing waveguide display systems adopt a fixed optical center distance design and cannot be adaptively adjusted according to the interpupillary distance of different users, resulting in problems such as double images, blurring, and visual fatigue during user use, seriously affecting the user experience and even potentially damaging the user's eyesight. Summary of the Invention

[0003] In view of this, this application provides an adjustment method for a waveguide display system, a waveguide display system, and an observation device. The main purpose is to improve the binocular imaging effect, reduce problems such as double images and blurring caused by the mismatch between the optical center distance of the waveguide display system and the user's interpupillary distance, and present a clear and stable visual image for the user.

[0004] To achieve the above object, this application mainly provides the following technical solutions:

[0005] In the first aspect of this application, an adjustment method for a waveguide display system is provided, including:

[0006] Collect user interpupillary distance information;

[0007] Compare the user interpupillary distance information with the optical center distance information of the waveguide display system, and generate an adjustment instruction based on the comparison result;

[0008] Respond to the adjustment instruction and control the working state of the waveguide display system.

[0009] In the second aspect of this application, a waveguide display system is provided, including:

[0010] An image display module, where two image display modules are provided, and the two image display modules are respectively used to provide display images to the left and right eyes of the user;

[0011] A control module, which is connected to the two image display modules, and the control module is used to execute the above adjustment method to adjust the interval distance between the two image display modules.

[0012] Optionally, the control module includes:

[0013] An image acquisition device, which is used to collect the user interpupillary distance information;

[0014] An information processing center, which is used to compare the user's pupil distance information with the optical center distance information of the waveguide display system, and generate the adjustment instruction according to the comparison result;

[0015] A servo component, which is connected to the two image display modules. The servo component is used to adjust the spacing between the two image display modules in response to the adjustment instruction.

[0016] Optionally, the servo component includes:

[0017] A driving part, a transmission part and a connecting part;

[0018] The driving part is connected to the transmission part, and the driving part is used to drive the transmission part to move;

[0019] The transmission part is also connected to the two image display modules, and the transmission part is used to transmit the driving force of the driving part to the two image display modules;

[0020] The two image display modules are movably arranged on the connecting part, and the connecting part is used to provide support and guidance for the movement of the two image display modules.

[0021] Optionally, the transmission part includes:

[0022] A transmission block and a transmission link;

[0023] The driving end of the driving part is connected to the transmission block, and the transmission block is used to receive the driving force output by the driving part;

[0024] The transmission links are respectively hinged to both sides of the transmission block, and one end of each transmission link away from the transmission block is hinged to the corresponding image display module;

[0025] Wherein, when the driving part drives the transmission block to move in a preset direction in a straight line, the transmission block drives the two image display modules to move synchronously and in opposite directions on the connecting part through the transmission links on both sides.

[0026] Optionally, the driving part includes:

[0027] A driving motor, a driving shaft and a guiding shaft;

[0028] The output shaft of the driving motor is connected to the driving shaft, and the driving motor is used to provide rotational power for the driving shaft;

[0029] The driving shaft is provided with a threaded structure, and the transmission block is connected to the driving shaft through the threaded structure. When the driving shaft rotates, the transmission block moves in a straight line along the axial direction of the driving shaft;

[0030] The guiding shaft is parallel to the driving shaft. The transmission block is slidably sleeved on the guiding shaft, and the guiding shaft is used to guide the linear motion of the transmission block.

[0031] Optionally, the connecting portion includes:

[0032] A moving shaft and two relatively arranged sliding blocks;

[0033] The moving shaft extends along the moving direction of the two image display modules. The two sliding blocks are respectively fixedly connected to the two image display modules, and the two sliding blocks are both slidably sleeved on the moving shaft.

[0034] Optionally, the connecting portion further includes:

[0035] A compression spring;

[0036] The compression spring is sleeved on the moving shaft and is located between the two sliding blocks.

[0037] Optionally, the waveguide display system further includes:

[0038] A follower block;

[0039] The follower block is rotatably arranged on the image display module. An arc-shaped groove is provided on the follower block. One end of the transmission link away from the transmission block is arranged in the arc-shaped groove and can move along the extending direction of the arc-shaped groove;

[0040] Wherein, the center of the arc-shaped groove is located on the axis of the moving shaft to form a kinematic pair structure capable of adjusting the posture of the image display module.

[0041] In a third aspect of the present application, an observation device is provided, including the waveguide display system according to any one of the above.

[0042] By means of the above technical solutions, the present application has at least the following beneficial effects:

[0043] In the embodiments of the present application, the adjustment method of the waveguide display system, the waveguide display system, and the observation device collect user pupil distance information, compare it with the optical center distance information of the waveguide display system, and generate an adjustment instruction based on the result to control the working state of the waveguide display system. This enables the waveguide display system to adaptively adjust according to the pupil distances of different users, effectively solving the problems of double images and blurriness caused by the existing waveguide display system with a fixed optical center distance design, thereby significantly improving the visual effect of users. Further, the optical center distance of the waveguide display system matches the user's pupil distance, improving the binocular imaging effect, reducing visual fatigue caused by visual discomfort, reducing the risk of damage to the user's eyesight, enhancing the comfort and safety of user use, and enabling the user to use the observation device for a longer time and more comfortably. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a flowchart of the adjustment method of the waveguide display system according to an optional embodiment of the present application;

[0045] Figure 2 is a schematic structural diagram of one perspective of the waveguide display system according to an optional embodiment of the present application;

[0046] Figure 3 is a schematic structural diagram of another perspective of the waveguide display system according to an optional embodiment of the present application;

[0047] Figure 4 is a schematic structural diagram of yet another perspective of the waveguide display system according to an optional embodiment of the present application.

[0048] The reference numerals are shown as:

[0049] 1. Image display module; 2. Control module; 21. Image acquisition device; 22. Information processing center; 23. Servo component; 231. Driving part; 2311. Driving motor; 2312. Driving shaft; 2313. Guide shaft; 232. Transmission part; 2321. Transmission block; 2322. Transmission link; 233. Connection part; 2331. Moving shaft; 2332. Sliding block; 2333. Compression spring; 3. Follow-up block; 31. Arc-shaped groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0050] The present application will be described in detail below with reference to the drawings and in conjunction with embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0051] In this embodiment, an adjustment method of a waveguide display system is provided. Referring to Figure 1 as shown, the method includes:

[0052] Step S101: Collect the user's interpupillary distance information.

[0053] Among them, the user's interpupillary distance information refers to the distance value between the centers of the two pupils of the user. Here, image recognition technology based on a camera can be used to capture the user's facial image, and through algorithm analysis, the positions of the two pupils are determined, and then the distance value between the centers of the two pupils is calculated; or an interpupillary distance measuring instrument can be used to directly measure the distance value between the centers of the two pupils of the user.

[0054] Specifically, when using image recognition technology based on a camera to collect the user's interpupillary distance information, first collect an image containing the user's two eyes, and then input the collected image into a trained image processing algorithm model. The image processing algorithm model is constructed based on deep learning technology, can identify the positions of the two pupils in the image, and calculate the distance value between the centers of the two pupils according to the identified positions of the two pupils, so as to obtain the user's interpupillary distance information.

[0055] Step S201: Compare the user's interpupillary distance information with the optical center distance information of the waveguide display system, and generate an adjustment instruction based on the comparison result.

[0056] Among them, the optical center distance information of the waveguide display system refers to the center distance value set by the optical elements in the waveguide display system. Here, the collected user's interpupillary distance information is compared with the optical center distance information of the waveguide display system. If the user's interpupillary distance does not match the optical center distance, corresponding adjustment instructions need to be generated according to the difference between the two. For example, if the user's interpupillary distance is greater than the optical center distance, it may be necessary to adjust the position of the optical element to increase the spacing between the images; conversely, if the user's interpupillary distance is less than the optical center distance, the image spacing needs to be reduced. The adjustment instruction can be specific numerical parameters, such as the displacement amount to be adjusted, or a control signal including the adjustment direction and approximate amplitude.

[0057] Step S301: Control the working state of the waveguide display system in response to the adjustment instruction.

[0058] Among them, after the waveguide display system receives the adjustment instruction, it will change its own working state according to the instruction. Here, it may involve adjustments in multiple aspects. For example, controlling the mechanical structure of the optical element to move or rotate to change the propagation path of light so that the position of the displayed image meets the requirements of the user's interpupillary distance; or adjusting the output parameters of the display chip, such as changing the resolution and refresh rate of the image, to optimize the image quality and ensure that the user can see a clear and comfortable image.

[0059] Specifically, by applying the technical solution of this embodiment, the user's pupil distance information is collected and compared with the optical center distance information of the waveguide display system, and an adjustment instruction is generated based on the result to control the working state of the waveguide display system. This enables the waveguide display system to adaptively adjust according to the pupil distances of different users, effectively solving the problems of double images and blurriness caused by the existing waveguide display system with a fixed optical center distance design, thereby significantly improving the user's visual effect. In addition, when the optical center distance of the waveguide display system matches the user's pupil distance, it can also improve the binocular imaging effect, reduce visual fatigue caused by visual discomfort, lower the risk of damage to the user's eyesight, enhance the comfort and safety of user use, and enable the user to use the observation device for a longer time and more comfortably.

[0060] Further, as a specific implementation of the above adjustment method for the waveguide display system, an embodiment of the present application provides a waveguide display system. Refer to Figure 2 、 Figure 3 and Figure 4 As shown, the system includes: an image display module 1. Two image display modules 1 are provided. The two image display modules 1 are respectively used to provide display images to the left and right eyes of the user; a control module 2. The control module 2 is connected to the two image display modules 1. The control module 2 is used to execute the above adjustment method to adjust the interval distance between the two image display modules 1.

[0061] Among them, the image display module 1 includes a micro OLED display and a waveguide display module. The micro OLED display has the characteristic of self-luminescence and can present image content with high contrast, wide color gamut, and fast response, laying a high-quality image foundation for the user's visual experience. The waveguide display module is a component that realizes efficient image transmission and presentation. The waveguide display module uses the principle of optical waveguide to guide the image information output by the micro OLED display to the user's eyes in a low-loss and high-fidelity manner through the internal optical structure. The waveguide display module includes multiple layers of optical thin films, which can accurately control the propagation path of light and ensure the clarity and stability of the image during transmission.

[0062] Specifically, in this embodiment, a single micro OLED display is fixedly connected to a single waveguide display module relatively, jointly constituting a complete image display module 1.

[0063] Among them, based on the principle of human binocular vision, the waveguide display system is provided with two image display modules 1 to provide independent display images for the left and right eyes respectively, creating a three-dimensional and immersive visual effect. For example, in virtual reality (VR) or augmented reality (AR) application scenarios, the left and right eyes of the user receive images from different perspectives, and the brain fuses these images to generate a realistic three-dimensional visual experience.

[0064] Specifically, the central distance value between the two image display modules 1 is the optical center distance information of the waveguide display system. In this embodiment, in order to enable the waveguide display system to adaptively adjust according to the interpupillary distance of different users, the waveguide display system is further provided with a control module 2, and the control module 2 is respectively connected to the two image display modules 1. In an actual application scenario, the control module 2 is used to execute step S101, step S201, and step S301 to adjust the interval distance between the two image display modules 1. For example, if the user's interpupillary distance is greater than the optical center distance, the control module 2 will generate an adjustment instruction to increase the interval distance between the image display modules 1. The specific implementation method may be to control mechanical devices such as motors to accurately move the positions of the image display modules 1, so as to achieve the purpose of adjusting the image interval distance. On the contrary, if the user's interpupillary distance is less than the optical center distance, the control module 2 will take corresponding measures to reduce the interval distance between the image display modules 1. In this way, the control module 2 can dynamically adjust the waveguide display system according to the interpupillary distance of different users, providing users with a clear and comfortable visual experience, and effectively solving the problems of ghosting, blurring, etc. that are prone to occur in the traditional waveguide display system with a fixed optical center distance design.

[0065] In some possible embodiments disclosed in the present application, as shown in Figure 2 The control module 2 includes: an image acquisition device 21 for acquiring user interpupillary distance information; an information processing center 22 for comparing the user interpupillary distance information with the optical center distance information of the waveguide display system and generating an adjustment instruction based on the comparison result; and a servo component 23 connected to the two image display modules 1, where the servo component 23 is used to adjust the interval distance between the two image display modules 1 in response to the adjustment instruction.

[0066] In this embodiment, the user's interpupillary distance information is collected by the image acquisition device 21. The distance value between the centers of the two pupils of the user can be accurately obtained by using the image recognition technology based on the camera, providing a reliable data basis for subsequent adjustments, ensuring that the adjustment of the waveguide display system is based on accurate individual user data, and improving the pertinence and accuracy of the adjustment. The information processing center 22 compares the collected user's interpupillary distance information with the optical center distance information of the waveguide display system, and generates an adjustment instruction based on the comparison result, realizing intelligent analysis and decision-making. It can automatically determine an appropriate adjustment strategy according to the difference between the interpupillary distance of different users and the optical center distance of the system, avoiding the cumbersome manual intervention and possible errors. By connecting the servo component 23 to the two image display modules 1, it can respond to the adjustment instruction and flexibly adjust the spacing between the two image display modules 1. Whether increasing or decreasing the spacing, the servo component 23 can be achieved by controlling mechanical devices such as motors, enabling the waveguide display system to adaptively adjust according to the interpupillary distance of different users, effectively solving the problems such as double image and blurring that are prone to occur in the waveguide display system with the traditional fixed optical center distance design, and providing a clear and comfortable visual experience for users.

[0067] Among them, the image acquisition device 21 can be a digital video camera. In the actual application scenario, the detection end of the image acquisition device 21 is set facing the user's eyes, used to capture the facial image containing the user's eyes, and identify the positions of the pupils of the two eyes in the facial image, so as to calculate the distance value between the centers of the two pupils according to the identified positions, and obtain the user's interpupillary distance information in this way.

[0068] Among them, the information processing center 22 can be composed of hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), or a field programmable gate array (FPGA), and runs a dedicated software or algorithm program. In the actual application scenario, the information processing center 22 is connected to the image acquisition device 21. The information processing center 22 is used to receive the user's interpupillary distance information transmitted by the image acquisition device 21, and then compare the user's interpupillary distance information with the optical center distance information of the waveguide display system, and generate an adjustment instruction based on the comparison result. For example, when the user's interpupillary distance is greater than the optical center distance, it may be necessary to increase the spacing between the images, and the information processing center 22 will generate a corresponding instruction; on the contrary, when the user's interpupillary distance is less than the optical center distance, an instruction to reduce the image spacing will be generated. It can be understood that the adjustment instruction can be a specific numerical parameter, such as the displacement amount to be adjusted, or a control signal including the adjustment direction and approximate amplitude.

[0069] Among them, the servo assembly 23 can be composed of a servo driver, a servo motor, and related mechanical transmission structures. In an actual application scenario, the servo driver of the servo assembly 23 is used to receive the adjustment instructions transmitted from the information processing center 22, decode and process them, and convert them into signals that can be understood and executed by the servo motor. The servo motor, as a power source, operates according to the signals sent by the servo driver and outputs precise power. The mechanical transmission structure transmits the power output by the servo motor to the image display module 1, thereby realizing the position movement of the image display module 1.

[0070] Specifically, when the servo assembly 23 moves the position of the image display module 1, a lead screw can be driven by the servo motor to rotate. The rotation of the lead screw will drive the slider connected thereto to move on the guide rail, and the image display module 1 is connected to the slider through a mechanical transmission structure. Thus, the movement of the slider can drive the movement of the image display module 1, thereby adjusting the spacing distance.

[0071] In some possible embodiments disclosed in the present application, as shown in Figure 2 the servo assembly 23 includes: a driving part 231, a transmission part 232, and a connecting part 233; the driving part 231 is connected to the transmission part 232, and the driving part 231 is used to drive the transmission part 232 to move; the transmission part 232 is also connected to two image display modules 1, and the transmission part 232 is used to transmit the driving force of the driving part 231 to the two image display modules 1; the two image display modules 1 are movably arranged on the connecting part 233, and the connecting part 233 is used to provide support and guidance for the movement of the two image display modules 1.

[0072] Among them, when the waveguide display system is applied to an observation device, the servo assembly 23 is arranged inside the housing of the observation device.

[0073] Specifically, the servo component 23 includes a connecting portion 233. The connecting portion 233 is fixedly arranged within the housing of the observation device, providing stable support and precise guidance for the two movable image display modules 1, ensuring that during the process of the servo component 23 adjusting the distance between the image display modules 1, all components can work in coordination to maintain the stability and accuracy of the system operation. The servo component 23 further includes a driving portion 231. The driving portion 231 is also fixedly arranged within the housing of the observation device, enabling the driving portion 231 to remain stable during operation and avoiding affecting the power output due to vibration or displacement. In an actual application scenario, the driving portion 231 is connected to the transmission portion 232. When the information processing center 22 issues an adjustment instruction, the driving portion 231 responds quickly according to the instruction, converting electrical energy or other forms of energy into mechanical energy, and providing continuous and precise driving force for the transmission portion 232. For example, if the driving portion 231 is a servo motor, it can accurately control the rotation speed and direction according to the received signal, providing reliable power support for the movement of the transmission portion 232. The transmission portion 232, under the drive of the driving portion 231, efficiently and stably transmits the driving force to the two image display modules 1, driving the two image display modules 1 to move on the connecting portion 233, thereby achieving the purpose of adjusting the distance between the two image display modules 1.

[0074] In the above embodiment, refer to Figure 2 and Figure 3 As shown, the transmission portion 232 includes: a transmission block 2321 and transmission connecting rods 2322; the driving end of the driving portion 231 is connected to the transmission block 2321, and the transmission block 2321 is used to receive the driving force output by the driving portion 231; both sides of the transmission block 2321 are hinged with transmission connecting rods 2322, and one end of each transmission connecting rod 2322 away from the transmission block 2321 is hinged to the corresponding image display module 1; wherein, when the driving portion 231 drives the transmission block 2321 to move linearly along a preset direction, the transmission block 2321 drives the two image display modules 1 to move synchronously and in opposite directions on the connecting portion 233 through the transmission connecting rods 2322 on both sides.

[0075] Among them, the transmission portion 232 is arranged on one side of the connecting portion 233 and is located between the connecting portion 233 and the driving portion 231. The image acquisition device 21 and the information processing center 22 are fixedly arranged on the driving portion 231.

[0076] Among them, the transmission portion 232 includes a transmission block 2321. The transmission block 2321 is connected to the driving end of the driving portion 231, and the power generated by the driving portion 231 (such as a servo motor converting electrical energy into mechanical energy) will be transmitted to the transmission block 2321. The transmission block 2321 serves as a key component in the power transmission process to receive the driving force.

[0077] Among them, the transmission part 232 further includes a transmission link 2322. Both sides of the transmission block 2321 are respectively connected to the transmission link 2322 by means of hinged joints. A hinged joint is a movable connection method that allows a certain degree of rotational freedom between the connected components. At the same time, the other end of each transmission link 2322 is also hinged to the corresponding image display module 1, thereby establishing a connection relationship among the transmission block 2321, the transmission link 2322, and the image display module 1, enabling power to be transmitted from the transmission block 2321 to the image display module 1 through the transmission link 2322.

[0078] Specifically, when the driving part 231 drives the transmission block 2321 to move linearly along a pre-set direction (such as the horizontal direction perpendicular to the connecting part 233) according to the adjustment instruction issued by the information processing center 22, since the transmission links 2322 hinged to both sides of the transmission block 2321 are also hinged to the image display module 1, when the transmission block 2321 moves linearly, it drives the two image display modules 1 to move on the connecting part 233 through the transmission links 2322. Moreover, the movements of the two image display modules 1 are synchronous (i.e., they start moving and stop moving at the same time, and their moving speeds are also the same within the same time) and opposite (one moves to the left and the other moves to the right). Thus, it is possible to flexibly adjust the distance between the two image display modules 1 according to the difference between the user's interpupillary distance and the optical center distance of the waveguide display system, so as to achieve the purpose of adaptive adjustment and solve problems such as double vision and blurring existing in the waveguide display system with a traditional fixed optical center distance design.

[0079] In the above embodiment, refer to Figure 3 As shown, the driving part 231 includes: a driving motor 2311, a driving shaft 2312, and a guiding shaft 2313; the output shaft of the driving motor 2311 is connected to the driving shaft 2312, and the driving motor 2311 is used to provide rotational power for the driving shaft 2312; a threaded structure is provided on the driving shaft 2312, and the transmission block 2321 is connected to the driving shaft 2312 through the threaded structure. When the driving shaft 2312 rotates, the transmission block 2321 moves linearly along the axial direction of the driving shaft 2312; the guiding shaft 2313 is parallel to the driving shaft 2312, and the transmission block 2321 is slidably sleeved on the guiding shaft 2313, and the guiding shaft 2313 is used to guide the linear movement of the transmission block 2321.

[0080] Among them, the driving motor 2311 is the power source of the driving part 231. Specifically, it can be a servo motor, and its output shaft is connected to the driving shaft 2312. When the driving motor 2311 is started, electrical energy is converted into mechanical energy to provide rotational power for the driving shaft 2312, and the driving shaft 2312 rotates under the drive of the driving motor 2311.

[0081] Among them, a threaded structure is provided on the drive shaft 2312, and the transmission block 2321 is connected to the drive shaft 2312 through the threaded structure. When the drive shaft 2312 rotates, due to the effect of the thread, the transmission block 2321 will move linearly along the axial direction of the drive shaft 2312. This realizes the conversion of the rotational motion of the drive shaft 2312 into the linear motion of the transmission block 2321, thereby providing a linear driving force for the transmission part 232.

[0082] Among them, the guide shaft 2313 is parallel to the drive shaft 2312, and the transmission block 2321 is slidably sleeved on the guide shaft 2313. The main function of the guide shaft 2313 is to guide the linear motion of the transmission block 2321, ensuring that the transmission block 2321 can move stably along a predetermined direction during the movement, avoiding deviation or shaking, thereby ensuring the accuracy and stability of the entire transmission process.

[0083] Specifically, the output shaft of the drive motor 2311 faces the connection part 233, and both the guide shaft 2313 and the drive shaft 2312 extend along the horizontal direction perpendicular to the connection part 233. Thus, it can be ensured that the movement trajectory of the transmission block 2321 always remains in the horizontal direction perpendicular to the connection part 233, ensuring that the image display module 1 connected to the transmission block 2321 through the transmission link 2322 can move synchronously and reversely on the connection part 233 in a stable and precise manner, thereby realizing the precise regulation of the interval distance of the image display module 1.

[0084] In the above embodiment, as shown in Figure 2 The connection part 233 includes: a moving shaft 2331 and two sliding blocks 2332 arranged oppositely; the moving shaft 2331 extends along the moving direction of the two image display modules 1, and the two sliding blocks 2332 are respectively fixedly connected to the two image display modules 1, and both the two sliding blocks 2332 are slidably sleeved on the moving shaft 2331.

[0085] Among them, the connection part 233 is fixedly arranged in the housing of the observation device, specifically, the moving shaft 2331 is fixedly arranged in the housing of the observation device, thereby laying a foundation for the stable movement of the image display module 1.

[0086] Specifically, the moving shaft 2331 extends along the moving direction of the image display module 1, and two sliding blocks 2332 are slidably arranged on the moving shaft 2331. The two sliding blocks 2332 are respectively relatively fixed to the two image display modules 1, so that the image display module 1 can slide on the moving shaft 2331 through the sliding blocks 2332.

[0087] In the above embodiment, as shown in Figure 2As shown, the connecting portion 233 further includes: a compression spring 2333; the compression spring 2333 is sleeved on the moving shaft 2331 and is located between the two sliding blocks 2332.

[0088] Wherein, the compression spring 2333 located between the two sliding blocks 2332 is used to apply a force to the sliding blocks 2332 in the direction opposite to the moving direction of the image display module 1, which can eliminate the moving gap during the movement of the image display module 1, stabilize the image display module 1, and reduce the displacement deviation of the image display module 1.

[0089] Specifically, when the waveguide display system is in the initial state, that is, when the two image display modules 1 have not started to move, the compression spring 2333 is in a compressed state. At this time, the compression spring 2333 applies a pre-tightening force to the two sliding blocks 2332. At the same time, the two sliding blocks 2332 are in a relatively static state under the pulling force of the transmission link 2322 on the moving shaft 2331, and maintain fixed positions with the image display modules 1 they are respectively connected to. When the image display module 1 starts to move, for example, when the image display module 1 moves along the direction of the moving shaft 2331 under the action of the pulling force applied by the transmission link 2322, the connected sliding block 2332 will also move accordingly. During this process, the compression spring 2333 is sleeved on the moving shaft 2331 and is located between the two sliding blocks 2332. The movement of the sliding block 2332 will continuously compress the compression spring 2333, causing the compression spring 2333 to undergo elastic deformation. According to Hooke's law, the compression spring 2333 will generate an elastic force in the direction opposite to the deformation direction. This elastic force acts on the sliding block 2332 and attempts to prevent the sliding block 2332 from moving. As the sliding block 2332 continues to move, the compression amount of the compression spring 2333 continuously increases, and the generated reverse elastic force also continues to increase. This reverse elastic force can not only offset the shaking of the sliding block 2332 caused by the pulling force fluctuation of the transmission link 2322 and the inaccuracy of the mechanical structure itself, but also correct the displacement deviation of the image display module 1 in real time. When the image display module 1 moves to the specified position and stops, the compression spring 2333 still remains in the compressed state and continuously applies a reverse elastic force to the sliding block 2332. This continuous acting force can tightly restrain the sliding block 2332, so that it will not displace on the moving shaft 2331 due to slight vibrations, bumps or other interference forces from the outside. Thus, the moving gap of the entire system in the stationary state is effectively eliminated, the stability of the waveguide display system is further improved, and it is ensured that the image display module 1 can be accurately positioned at the target position, presenting a clear and stable image display effect for the user.

[0090] In some possible implementation embodiments disclosed in the present application, refer to Figure 2 and Figure 4As shown in the figure, the waveguide display system further includes: a follower block 3; the follower block 3 is rotatably arranged on the image display module 1, and an arc-shaped groove 31 is arranged on the follower block 3. One end of the transmission link 2322 away from the transmission block 2321 is arranged in the arc-shaped groove 31 and can move along the extension direction of the arc-shaped groove 31; wherein, the center of the arc-shaped groove 31 is located on the axis of the moving shaft 2331 to form a kinematic pair structure capable of adjusting the posture of the image display module 1.

[0091] In this embodiment, by rotatably arranging the follower block 3 on the image display module 1, opening the arc-shaped groove 31 on the follower block 3, and at the same time placing one end of the transmission link 2322 away from the transmission block 2321 in the arc-shaped groove 31 and allowing it to move along its extension direction, and the center of the arc-shaped groove 31 is located on the axis of the moving shaft 2331 to form a specific kinematic pair structure. During the process of the image display module 1 moving with the transmission link 2322 to adjust the spacing distance, by using the cooperation between the arc-shaped groove 31 and the transmission link 2322, the image display module 1 can rotate around the axis of the moving shaft 2331. Thus, according to the pupil distance and binocular position of different users, the posture of the image display module 1 can be accurately adjusted to make it precisely parallel to the user's binoculars, ensuring that the images received by the user's binoculars are at the best visual angle when using the waveguide display system, effectively reducing the visual deviation caused by the non-parallelism between the image display module 1 and the binoculars, greatly improving the user's visual experience, enhancing the adaptability of the waveguide display system to different user individual differences, solving the visual discomfort problem caused by the improper posture of the display module, and enhancing the practicability and reliability of the system.

[0092] Among them, the follower block 3 is rotatably connected to the image display module 1, and the transmission link 2322 is also connected to the follower block 3, enabling the transmission link 2322 to be indirectly hinged to the image display module 1. Thus, when the transmission link 2322 moves, it can drive the follower block 3 to rotate, and then drive the image display module 1 to produce corresponding motion changes. For example, when the transmission link 2322 is forced to move, the force can be transmitted to the image display module 1 through the follower block 3, and due to the hinged relationship, the image display module 1 is allowed to adjust its own position.

[0093] Specifically, in the waveguide display system, there are two image display modules 1 connected by the transmission link 2322. When the transmission link 2322 moves, it can simultaneously push or pull the two image display modules 1, causing the two image display modules 1 to move synchronously and in opposite directions, so as to achieve the purpose of adjusting the spacing distance between the two image display modules 1.

[0094] Among them, in the actual application scenario of the waveguide display system, the adjustment of the parallel state between the image display module 1 and the user's binoculars can be achieved through manual operation.

[0095] Specifically, the observation device applied in the waveguide display system can be provided with two outer casings, namely a first outer casing and a second outer casing. The driving unit 231, the transmission unit 232, and the connecting unit 233 are arranged inside the first outer casing. The image display module 1 is arranged inside the second outer casing. The second outer casing is rotatably connected to the first outer casing, and the rotation connection point is the axis of the moving shaft 2331. When the user needs to manually adjust the image display module 1 to be parallel to their own eyes, the operation method is simple and direct, and the user only needs to hold the second outer casing. Due to the rotational connection characteristics between the second outer casing and the first outer casing, the user can slowly rotate the second outer casing according to the actual position of their own eyes and the visual perception. During this manual adjustment process, the internal structure of the system operates in coordination. The follower block 3 is a key component among them, and an arc-shaped groove 31 is arranged thereon, and the center of the arc-shaped groove 31 coincides with the axis of the moving shaft 2331, so that the connection point position between the follower block 3 and the transmission link 2322 can be flexibly adjusted. Moreover, since the rotation connection point is the axis of the moving shaft 2331, when the second outer casing drives the image display module 1 to rotate, the connection point between the follower block 3 and the transmission link 2322 is exactly located on the rotation path of the image display module 1. This means that during the process of the user rotating the second outer casing to adjust the posture of the image display module 1, the change in the connection point position between the follower block 3 and the transmission link 2322 will occur synchronously with the rotation of the image display module 1, thereby coordinating with the rotation of the second outer casing to more accurately and efficiently achieve the adjustment of the posture of the image display module 1, and finally enabling the image display module 1 to be accurately parallel to the user's eyes, providing a high-quality and comfortable visual experience for the user.

[0096] Furthermore, as a specific application of the above waveguide display system, an embodiment of the present application provides an observation device.

[0097] Among them, the observation device can be a head-mounted observation device, such as a night vision device, etc.

[0098] Specifically, the housing of the observation device is provided with an image acquisition window for aligning with the user's binoculars, ensuring that when the user wears the observation device normally, the internally mounted image acquisition device 21, such as a high-resolution camera, can clearly capture the image information of the user's binoculars through this window. The image acquisition device 21 quickly transmits the captured images to the information processing center 22. The information processing center 22 uses image processing algorithms to identify the positions of the binocular pupils and calculates the user's interpupillary distance information accordingly. Subsequently, the information processing center 22 compares the user's interpupillary distance information with the optical center distance information of the waveguide display system. If there is a difference between the two, the information processing center 22 will quickly generate corresponding adjustment instructions according to the pre-set rules. This adjustment instruction will be immediately sent to the servo assembly 23. The driving part 231 in the servo assembly 23 responds first, and the driving motor 2311 starts to operate according to the instruction, and the driving shaft 2312 rotates accordingly. Since the threaded structure on the driving shaft 2312 cooperates with the transmission block 2321, the transmission block 2321 moves linearly along the direction specified by the guide shaft 2313 under the drive of the driving shaft 2312. The linear motion of the transmission block 2321 is transmitted to the two image display modules 1 through the transmission link 2322. One end of the transmission link 2322 is hinged to the transmission block 2321, and the other end is connected to the image display module 1 through the follower block 3. When the transmission block 2321 moves, the transmission link 2322 drives the image display module 1 to move synchronously and reversely on the connecting part 233. The moving shaft 2331 in the connecting part 233 provides stable support and accurate guidance for the movement of the image display module 1, and the sliding block 2332 slides smoothly on the moving shaft 2331 to ensure that the image display module 1 can accurately move to the specified position. During this process, the compression spring 2333 plays an important role. The compression spring 2333 always applies a force opposite to the moving direction of the image display module 1 to the sliding block 2332, effectively eliminating the moving gap and ensuring the stability and accuracy of the image display module 1 during movement. At the same time, if the user feels that there is a deviation in the parallelism between the image display module 1 and the binoculars during use, the second housing of the observation device can be manually adjusted. Since the second housing and the first housing are rotationally connected with the axis of the moving shaft 2331 as the connection point, when the user rotates the second housing, the image display module 1 rotates accordingly. The center of the arc-shaped groove 31 on the follower block 3 coincides with the axis of the moving shaft 2331, so that the position of the transmission link 2322 in the arc-shaped groove 31 can be flexibly adjusted with the rotation of the image display module 1, thereby precisely changing the posture of the image display module 1 until it is parallel to the user's binoculars, presenting the best visual effect for the user.

[0099] Those skilled in the art can easily understand that, on the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0100] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present application, several improvements and variations can also be made, and these improvements and variations should also be regarded as within the protection scope of the present application.

Claims

1. A method for adjusting a waveguide display system, characterized in that Comprising: Collecting the user's interpupillary distance information; Comparing the user's interpupillary distance information with the optical center distance information of the waveguide display system, and generating an adjustment instruction according to the comparison result; Controlling the working state of the waveguide display system in response to the adjustment instruction.

2. A waveguide display system, characterized in that, Comprising: An image display module (1), two of the image display modules (1) are provided, and the two image display modules (1) are respectively used to provide display images to the user's left eye and right eye; A control module (2), the control module (2) is connected to the two image display modules (1), and the control module (2) is used to execute the adjustment method as described in claim 1 to adjust the spacing between the two image display modules (1).

3. The waveguide display system according to claim 2, wherein, The control module (2) includes: An image acquisition device (21), the image acquisition device (21) is used to acquire the user's interpupillary distance information; An information processing center (22), the information processing center (22) is used to compare the user's interpupillary distance information with the optical center distance information of the waveguide display system, and generate the adjustment instruction according to the comparison result; A servo component (23), the servo component (23) is connected to the two image display modules (1), and the servo component (23) is used to adjust the spacing between the two image display modules (1) in response to the adjustment instruction.

4. The waveguide display system according to claim 3, wherein The servo component (23) includes: A driving part (231), a transmission part (232) and a connecting part (233); The driving part (231) is connected to the transmission part (232), and the driving part (231) is used to drive the transmission part (232) to move; The transmission part (232) is also connected to the two image display modules (1), and the transmission part (232) is used to transmit the driving force of the driving part (231) to the two image display modules (1); The two image display modules (1) are movably arranged on the connecting part (233), and the connecting part (233) is used to provide support and guidance for the movement of the two image display modules (1).

5. The waveguide display system according to claim 4, characterized in that, The transmission part (232) includes: A transmission block (2321) and a transmission connecting rod (2322); The driving end of the driving part (231) is connected to the transmission block (2321), and the transmission block (2321) is used to receive the driving force output by the driving part (231); The transmission connecting rods (2322) are respectively hinged on both sides of the transmission block (2321), and one end of each transmission connecting rod (2322) away from the transmission block (2321) is hinged to the corresponding image display module (1); Wherein, when the driving part (231) drives the transmission block (2321) to move linearly in a preset direction, the transmission block (2321) drives the two image display modules (1) to move synchronously and in opposite directions on the connecting part (233) through the transmission connecting rods (2322) on both sides.

6. The waveguide display system according to claim 5, wherein, The driving part (231) includes: A driving motor (2311), a driving shaft (2312) and a guiding shaft (2313); The output shaft of the driving motor (2311) is connected to the driving shaft (2312), and the driving motor (2311) is used to provide rotational power for the driving shaft (2312); A threaded structure is provided on the driving shaft (2312), and the transmission block (2321) is connected to the driving shaft (2312) through the threaded structure. When the driving shaft (2312) rotates, the transmission block (2321) moves linearly along the axial direction of the driving shaft (2312); The guide shaft (2313) is parallel to the driving shaft (2312), the transmission block (2321) is slidably sleeved on the guide shaft (2313), and the guide shaft (2313) is used to guide the linear motion of the transmission block (2321).

7. The waveguide display system according to claim 5, wherein The connecting portion (233) includes: A moving shaft (2331) and two relatively arranged sliding blocks (2332); The moving shaft (2331) extends along the moving direction of the two image display modules (1), the two sliding blocks (2332) are respectively fixedly connected to the two image display modules (1), and the two sliding blocks (2332) are both slidably sleeved on the moving shaft (2331).

8. The waveguide display system according to claim 7, wherein The connecting portion (233) further includes: A compression spring (2333); The compression spring (2333) is sleeved on the moving shaft (2331) and is located between the two sliding blocks (2332).

9. The waveguide display system according to claim 8, wherein, It further includes: A follower block (3); The follower block (3) is rotatably arranged on the image display module (1), an arc-shaped groove (31) is provided on the follower block (3), and one end of the transmission link (2322) away from the transmission block (2321) is arranged in the arc-shaped groove (31) and can move along the extending direction of the arc-shaped groove (31); Wherein, the center of the arc-shaped groove (31) is located on the axis of the moving shaft (2331) to form a kinematic pair structure capable of adjusting the posture of the image display module (1).

10. An observation device, characterized in that, It includes the waveguide display system according to any one of claims 2-9.

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