Eye-tracking modules and near-eye display devices

Abstract

This invention relates to an eye-tracking module and a near-eye display device, which can be adapted to optical modules of different shapes, enabling most near-eye display devices to have eye-tracking functionality. The eye-tracking module includes: an eye-tracking assembly comprising a flexible circuit board electrically connected to the near-eye display module, a plurality of light-emitting elements electrically connected to the flexible circuit board, and an imaging module electrically connected to the flexible circuit board; the flexible circuit board has a ring structure, and the plurality of light-emitting elements are circumferentially arranged on the flexible circuit board; and an eye-tracking clamping assembly comprising a pair of eye-tracking frames and a pair of spacing adjustment mechanisms; the two eye-tracking frames are arranged end-to-end at intervals and fixedly connected to the flexible circuit board; the two spacing adjustment mechanisms are respectively disposed between the ends of the two eye-tracking frames to adjust the end spacing between the two eye-tracking frames, thereby forming an adjustable clamping space between the two eye-tracking frames that is adapted to the optical module of the near-eye display module.

Description

Technical Field

[0001] This invention relates to the field of near-eye display technology, and in particular to an eye-tracking module and a near-eye display device. Background Technology

[0002] Near-eye display devices, such as augmented reality (AR) and virtual reality (VR), are wearable devices that provide near-eye visibility and are gradually gaining widespread market application. Currently, existing near-eye display devices typically involve head rotation or manual operation to observe or select different targets in a virtual scene during human-computer interaction. However, when faced with more complex scenes or when multiple scene selections are required, users need to rotate their heads or perform manual operations repeatedly, which can easily increase user fatigue and reduce the human-computer interaction experience.

[0003] Because eye muscles are immune to fatigue (moving the eyes doesn't cause tiredness), human-computer interaction through eye movements can reduce user fatigue. Furthermore, with the development of foveated rendering technology, by capturing the user's gaze point, image enhancement is applied to the gaze area to present a high-quality image, while the image of non-foveated areas is weakened. This improves data processing speed while reducing the hardware requirements of devices or applications.

[0004] However, existing smart glasses typically lack eye-tracking capabilities, failing to meet the demands of eye-tracking interaction. To enable eye-tracking in existing smart glasses, an eye-tracking device has emerged that can be detachably installed, allowing the application of eye-tracking technology. However, due to the significant differences in the form factors of existing smart glasses, and the fact that this eye-tracking device is only compatible with specific types of smart glasses, how to enable eye-tracking functionality across different types of smart glasses remains a pressing technical challenge. Summary of the Invention

[0005] One advantage of this invention is that it provides an eye-tracking module and a near-eye display device that can be adapted to optical modules of different shapes, enabling most near-eye display devices to have eye-tracking functionality.

[0006] Another advantage of the present invention is that it provides an eye-tracking module and a near-eye display device. In one embodiment of the present invention, the eye-tracking module can save and optimize the local rendering resources of the near-eye display device in human-computer interaction scenarios, thereby improving the product experience of the near-eye display device.

[0007] Another advantage of the present invention is that it provides an eye-tracking module and a near-eye display device. In one embodiment of the present invention, the eye-tracking module can be clamped to most near-eye display modules by means of guide rail and nut step tightening, which has strong applicability, simple structure and small size.

[0008] Another advantage of the present invention is that it provides an eye-tracking module and a near-eye display device. In one embodiment of the present invention, the near-eye display device can save space and reduce the risk of using the device through modular design, thus ensuring the comfort of data acquisition and use.

[0009] Another advantage of this invention is that it provides a near-eye display device in which, to achieve the aforementioned advantages, expensive materials or complex structures are not required. Therefore, this invention successfully and effectively provides a solution that not only offers a simple near-eye display device but also increases the practicality and reliability of said near-eye display device.

[0010] To achieve at least one of the above-mentioned advantages or other benefits and objectives of the present invention, the present invention provides an eye-tracking module for enabling a near-eye display module to have eye-tracking functionality, comprising:

[0011] An eye-tracking component includes a flexible circuit board electrically connectable to the near-eye display module, a plurality of light-emitting elements electrically connected to the flexible circuit board, and an imaging module electrically connected to the flexible circuit board; the flexible circuit board has a ring structure, and the plurality of light-emitting elements are circumferentially arranged on the flexible circuit board; and

[0012] An eye-tracking clamping assembly includes a pair of eye-tracking frames and a pair of spacing adjustment mechanisms; the two eye-tracking frames are arranged end-to-end and fixedly connected to the flexible circuit board; the two spacing adjustment mechanisms are respectively disposed between the ends of the two eye-tracking frames to adjust the end spacing between the two eye-tracking frames, thereby forming an adjustable clamping space between the two eye-tracking frames that is adapted to the optical module of the near-eye display module.

[0013] According to one embodiment of this application, the spacing adjustment mechanism includes a guide and an adjusting nut. The guide has a fixed end that is fixedly connected to the end of one of the eye-tracking frames and a sliding end that is slidably connected to the end of the other eye-tracking frame. The adjusting nut passes through the end of the other eye-tracking frame and is threadedly connected to the sliding end of the guide to limit the maximum end spacing between the two eye-tracking frames.

[0014] According to one embodiment of this application, the eye-tracking frame has a sliding groove that matches the sliding end of the guide member, the sliding end of the guide member being slidably inserted into the sliding groove of the eye-tracking frame; the adjusting nut is slidably inserted through the sliding groove and threadedly connected to the sliding end.

[0015] According to one embodiment of this application, the spacing adjustment mechanism further includes an elastic element disposed between the ends of the two eye-tracking frames; the elastic element is a spring housed within the sliding groove, the spring being fitted onto the adjusting nut; one end of the spring abuts against the guide member, and the other end of the spring abuts against the bottom of the sliding groove.

[0016] According to one embodiment of this application, the eye-tracking clamping assembly further includes a flexible pad and a locking ball, the flexible pad being fixed to the eye-tracking frame; the eye-tracking frame having a threaded hole matching the locking ball, the locking ball being threadedly connected to the eye-tracking frame to extend out of the threaded hole.

[0017] According to one embodiment of this application, the eye-tracking frame includes an arc-shaped frame for fixing the flexible circuit board, an adjustment end extending radially outward from the arc-shaped frame, and a clamping arm extending axially forward from the arc-shaped frame; a guide is fixedly connected to the adjustment end of one of the eye-tracking frames, and a sliding groove is formed at the adjustment end of the other eye-tracking frame; a flexible gasket is bonded to the inner surface of the clamping arm, and a threaded hole is formed in the clamping arm of the eye-tracking frame so that a locking ball threadedly connected to the threaded hole passes through the flexible gasket.

[0018] According to one embodiment of this application, the flexible circuit board includes an annular plate, a plurality of mounting plates extending forward at an incline from the inner edge of the annular plate, and a connecting plate extending forward from the outer edge of the annular plate; the light-emitting element and the imaging module are respectively electrically mounted on the rear side of the mounting plates; two eye-tracking frames are mounted on the front side of the annular plate at intervals; the eye-tracking frames further have positioning grooves formed in the arc-shaped frame, and the mounting plates are correspondingly embedded in the positioning grooves of the arc-shaped frame.

[0019] According to one embodiment of this application, the light-emitting element is an infrared light source; the imaging module is an infrared camera.

[0020] According to one embodiment of this application, the eye-tracking module further includes a pair of light-transmitting covers, each of which is correspondingly disposed on the eye-tracking frame to cover the eye-tracking component.

[0021] According to another aspect of this application, one embodiment of this application further provides a near-eye display device, comprising:

[0022] Near-eye display module, including a headgear and a pair of optical modules mounted on the headgear; and

[0023] The eye-tracking module described above correspondingly holds the optical module. Attached Figure Description

[0024] Figure 1 This is a perspective view of a near-eye display device according to an embodiment of the present invention;

[0025] Figure 2 An exploded view of a near-eye display device according to the above embodiment of the present invention is shown;

[0026] Figure 3 A three-dimensional schematic diagram of an eye-tracking module in a near-eye display device according to the above embodiments of the present invention is shown;

[0027] Figure 4 A three-dimensional schematic diagram of an eye-tracking module according to the above embodiment of the present invention is shown from another perspective;

[0028] Figure 5 An exploded view of an eye-tracking module according to the above embodiment of the present invention is shown;

[0029] Figure 6 A forward-looking schematic diagram of an eye-tracking module according to the above embodiment of the present invention is shown;

[0030] Figure 7 It shows Figure 6 The diagram shows a cross-sectional view of the eye-tracking module.

[0031] Figure 8 It shows Figure 6 The diagram shows a cross-sectional view of the BB in the eye-tracking module.

[0032] Key component symbols: 1. Eye-tracking module; 10. Eye-tracking assembly; 11. Flexible circuit board; 111. Ring-shaped board; 112. Mounting board; 113. Connecting board; 12. Light-emitting element; 120. Infrared light source; 13. Imaging module; 130. Infrared camera; 20. Eye-tracking clamping assembly; 200. Adjustable clamping space; 21. Eye-tracking frame; 2101. Sliding groove; 2102. Threaded hole; 2 103. Positioning groove; 211. Arc-shaped frame; 212. Adjustment end; 213. Clamping arm; 22. Spacing adjustment mechanism; 221. Guide component; 2211. Fixed end; 2212. Sliding end; 222. Adjusting nut; 223. Elastic component; 2230. Spring; 23. Flexible gasket; 24. Locking ball; 30. Light-transmitting cover plate; 5. Near-eye display module; 51. Headgear frame; 52. Optical module.

[0033] The above description of the main component symbols, together with the accompanying drawings and specific embodiments, provides a more detailed explanation of the present invention. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0036] In this invention, the term "a" in the claims and specification should be understood as "one or more," that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. Unless explicitly indicated in the disclosure of this invention that the number of the element is only one, the term "a" should not be construed as unique or single, and the term "a" should not be construed as a limitation on the quantity.

[0037] In the description of this invention, it should be understood that terms such as "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, terms such as "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through a medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] Given the significant differences in form factors among existing smart glasses, and the fact that current eye-tracking devices are only compatible with specific types of smart glasses, enabling eye-tracking functionality across different types of smart glasses is a pressing technical challenge. To address this issue, this application provides an eye-tracking module and a near-eye display device that can adapt to different optical module shapes, enabling most near-eye display devices to have eye-tracking capabilities.

[0041] Specifically, see the attached document. Figures 1 to 8As shown, one embodiment of the present invention provides a near-eye display device, which may include an eye-tracking module 1 and a near-eye display module 5. The eye-tracking module 1 is detachably mounted on the near-eye display module 5 to form a near-eye display device with eye-tracking function. This allows users wearing the near-eye display device to perform human-computer interaction simply by moving their eyeballs, without needing to turn their heads or perform manual human-computer interaction, which helps reduce user fatigue and improve the human-computer interaction experience. It is understood that, as Figure 2 As shown, the near-eye display module 5 of this application typically includes a headband 51 for wearing and a pair of optical modules 52 mounted on the headband 51. When a user wears the near-eye display module 5 through the headband 51, the two optical modules 52 are respectively located in front of the user's eyes to achieve near-eye display. In addition, the near-eye display module 5 of this application can be, but is not limited to, implemented as an XR wearable device such as AR glasses or VR glasses.

[0042] More specifically, such as Figures 2 to 5 As shown, the eye-tracking module 1 may include an eye-tracking component 10 and an eye-tracking clamping component 20. The eye-tracking component 10 includes a flexible circuit board 11 electrically connected to the near-eye display module 5, a plurality of light-emitting elements 12 electrically connected to the flexible circuit board 11, and an imaging module 13 electrically connected to the flexible circuit board 11; the flexible circuit board 11 has a ring structure, and the plurality of light-emitting elements 12 are arranged circumferentially on the flexible circuit board 11. The eye-tracking clamping component 20 includes a pair of eye-tracking frames 21 and a pair of spacing adjustment mechanisms 22; the two eye-tracking frames 21 are arranged end-to-end and fixedly connected to the flexible circuit board 11; the two spacing adjustment mechanisms 22 are respectively disposed between the ends of the two eye-tracking frames 21 to adjust the end spacing between the two eye-tracking frames 21, thereby forming an adjustable clamping space 200 between the two eye-tracking frames 21 that is adapted to the optical module 52 of the near-eye display module 5.

[0043] It is worth noting that, in order to achieve a thinner and lighter device, the optical module 52 usually adopts a folded optical path (pancake) for imaging display. Although different near-eye display modules 5 have significant differences in morphological features, the optical module 52 will protrude from the headgear frame 51. Therefore, the eye-tracking module 1 of this application can hold the optical module 52 of most near-eye display modules 5 by forming an adjustable clamping space 200 between the two eye-tracking frames 21 that is adapted to the optical module 52. It can not only be used to match most near-eye display modules 5 to realize eye-tracking function, but also save the space of the device, reduce the risk factor of device use, and ensure the comfort of data acquisition and use.

[0044] Furthermore, the near-eye display device of this application adopts a modular design: on the one hand, multiple light-emitting elements 12 and imaging modules 13 are integrated together to form a standard eye-tracking module 1; on the other hand, the installation size of the eye-tracking module 1 (i.e., adjustable clamping space 200) is adjusted by the eye-tracking clamping assembly 20, so that the eye-tracking module 1 can become a widely applicable standalone external eye-tracking module, so as to match different head-mounted devices at the structural design level, improve its practicality, realize the organic integration of a single module (eye-tracking module 1) and a head-mounted device (near-eye display module 5), and enable most near-eye display devices to have eye-tracking function.

[0045] For example, such as Figure 5 and Figure 7 As shown, the spacing adjustment mechanism 22 may include a guide 221 and an adjusting nut 222; the guide 221 has a fixed end 2211 fixedly connected to the end of one eye-tracking frame 21 and a sliding end 2212 slidably connected to the end of another eye-tracking frame 21; the adjusting nut 222 passes through the end of the other eye-tracking frame 21 and is threadedly connected to the sliding end 2212 of the guide 221 to limit the maximum end spacing between the two eye-tracking frames 21 so as to releasably clamp the optical module 52 of the near-eye display module 5. Thus, when the adjusting nut 222 is turned to reduce the maximum end distance between the two eye-tracking frames 21, the adjustable clamping space 200 between the two eye-tracking frames 21 is reduced to clamp the optical module 52 of the near-eye display module 5, realizing convenient clamping between the eye-tracking module 1 and the near-eye display module 5; when the adjusting nut 222 is turned in the opposite direction to increase the maximum end distance between the two eye-tracking frames 21, the adjustable clamping space 200 between the two eye-tracking frames 21 is expanded to release the optical module 52 of the near-eye display module 5, realizing convenient disassembly between the eye-tracking module 1 and the near-eye display module 5.

[0046] Optionally, the maximum end spacing between the two eye-tracking frames 21 can be adjusted between 0 mm and 10 mm to securely hold the optical module 52 of most near-eye display modules 5, thus having a wide range of applications.

[0047] Optionally, such as Figure 5 and Figure 7 As shown, the eye-tracking frame 21 has a sliding groove 2101 that matches the sliding end 2212 of the guide member 221. The sliding end 2212 of the guide member 221 is slidably inserted into the sliding groove 2101 of the eye-tracking frame 21 to guide the two eye-tracking frames 21 to move closer or further apart from each other along the extension direction of the guide member 221. The adjusting nut 222 is slidably inserted through the sliding groove 2101 and threadedly connected to the sliding end 2212 of the guide member 221, thereby effectively adjusting the end spacing between the two eye-tracking frames 21.

[0048] Optionally, such as Figure 5 and Figure 7 As shown, the spacing adjustment mechanism 22 further includes an elastic element 223, which is disposed between the ends of the two eye movement frames 21 so that the two eye movement frames 21 are kept at the maximum end spacing under the action of the elastic element 223, which is convenient to fit on the optical module 52 and facilitates subsequent tightening of the adjusting nut 222 to clamp the optical module 52.

[0049] It is worth noting that, such as Figure 5 and Figure 7 As shown, the elastic element 223 can be, but is not limited to, a spring 2230. One end of the spring 2230 abuts against a guide 221 fixedly connected to one eye-tracking frame 21, and the other end of the spring 2230 abuts against the bottom of a sliding groove 2101 formed in another eye-tracking frame 21, so as to apply an elastic force that moves the two eye-tracking frames 21 away from each other. It is understood that the guide 221 mentioned in this application can be, but is not limited to, a guide post extending from the end of one eye-tracking frame 21 toward the end of the other eye-tracking frame 21.

[0050] Optionally, such as Figure 7 As shown, the spring 2230 is housed within the sliding groove 2101 and is fitted onto the adjusting nut 222 to ensure that the spring 2230 extends and retracts along the extension direction of the guide member 221, which helps to improve the service life of the spring 2230.

[0051] Based on the above example of this application, such as Figures 4 to 6 As shown, the eye-tracking clamping assembly 20 may further include a flexible pad 23, which is fixed to the eye-tracking frame 21. When the eye-tracking clamping assembly 20 is clamped to the optical module 52, the flexible pad 23 is located between the eye-tracking frame 21 and the optical module 52, thereby increasing the contact friction between the eye-tracking frame 21 and the optical module 52 and improving the clamping firmness between the eye-tracking clamping assembly 20 and the optical module 52. It is understood that the flexible pad 23 mentioned in this application may, but is not limited to, be implemented as a pad made of materials such as rubber or silicone.

[0052] Optionally, such as Figures 4 to 8As shown, the eye-tracking clamping assembly 20 may further include a locking ball 24; the eye-tracking frame 21 has a threaded hole 2102 that matches the locking ball 24, and the locking ball 24 is threaded to the eye-tracking frame 21 to extend out of the threaded hole 2102, so that when the eye-tracking clamping assembly 20 is clamped to the optical module 52, it abuts against the outer peripheral surface of the optical module 52, thereby adjusting the locking ball 24 to compensate for the gap between the eye-tracking frame 21 and the optical module 52, which helps to further improve the clamping firmness between the eye-tracking clamping assembly 20 and the optical module 52.

[0053] Optionally, such as Figure 4 and Figure 5 As shown, the eye-tracking frame 21 includes an arc-shaped frame 211 for fixing the flexible circuit board 11, an adjustment end 212 extending radially outward from the arc-shaped frame 211, and a clamping arm 213 extending axially forward from the arc-shaped frame 211; the guide member 221 is fixedly connected to the adjustment end 212 of one eye-tracking frame 21, and the sliding groove 2101 is opened at the adjustment end 212 of the other eye-tracking frame 21; the flexible pad 23 is bonded to the inner surface of the clamping arm 213, and the threaded hole 2102 is opened in the clamping arm 213 of the eye-tracking frame 21, so that the locking ball 24 threadedly connected to the threaded hole 2102 can pass through the flexible pad 23 to tightly abut against the optical module 52, ensuring that the eye-tracking frame 21 is not easily dislodged from the optical module 52 when the near-eye display device is working. It is understood that "forward" as mentioned in this application refers to the direction from the user's eyes toward the optical module 52, that is, the optical module 52 is located in front of the user's eyes.

[0054] According to the above embodiments of this application, as Figure 5 As shown, the light-emitting element 12 in the eye-tracking component 10 can be, but is not limited to, an infrared light source 120; correspondingly, the imaging module 13 in the eye-tracking component 10 can be implemented as an infrared camera 130. Thus, when the eye-tracking module 1 is communicatively mounted on the near-eye display module 5, the infrared light source 120 can emit infrared light towards the user's eyes, and the infrared camera can collect the light information reflected by the eyes, thereby collecting and processing eye movement information, enabling preliminary eye-tracking interaction with the user.

[0055] Optionally, such as Figure 5As shown, the flexible circuit board 11 includes an annular plate 111, a plurality of mounting plates 112 extending forward at an angle from the inner edge of the annular plate 111, and a connecting plate 113 extending forward from the outer edge of the annular plate 111. The light-emitting element 12 and the imaging module 13 are electrically mounted on the rear side of the mounting plates 112, and the connecting plate 113 is used for communicatively electrical connection to the near-eye display module 5. Two eye-tracking frames 21 are mounted at intervals on the front side of the annular plate 111 to support the flexible circuit board 11. It is understood that the connecting plate 113 mentioned in this application may, but is not limited to, have a common interface such as a standard serial port, a Type-C interface, or a USB interface.

[0056] Optionally, such as Figure 5 and Figure 8 As shown, the eye-tracking frame 21 further has a positioning groove 2103 formed in the arc-shaped frame 211, and the mounting plate 112 is correspondingly embedded in the positioning groove 2103 of the arc-shaped frame 211 in order to position and support the infrared light source 120 and the infrared camera 130.

[0057] For example, such as Figure 5 As shown, the eye-tracking component 10 of this application can have eight infrared light sources 120 and one infrared camera 130. The eight infrared light sources 120 are axially symmetrically distributed on the flexible circuit board 11, and the infrared camera 130 is located between two infrared light sources 120, so that one infrared camera 130 can simultaneously adapt to eight infrared light sources 120, so that the eight infrared light sources 120 correspond to eight positions of the eye, which is beneficial for more accurate acquisition of eye movement information. It can be understood that since multiple infrared light sources 120 are arranged in a ring around the flexible circuit board 11, and the infrared beam emitted by each infrared light source 120 can directly illuminate the eye, multiple light spots will be formed on the eye. Therefore, when the eye moves to different positions, the infrared camera 130 will acquire images of different light spots to complete the capture of the eye, thereby achieving high eye-tracking efficiency and improving human-computer interaction efficiency.

[0058] According to the above embodiments of this application, as Figures 2 to 8 As shown, the eye-tracking module 1 may further include a pair of light-transmitting covers 30, each of which is correspondingly covered on the eye-tracking frame 21 to cover the eye-tracking component 10, so that the infrared light emitted by the infrared light source 120 in the eye-tracking component 10 first passes through the light-transmitting cover 30 and then propagates to the eye, and the infrared light reflected by the eye first passes through the light-transmitting cover 30 and is then received by the infrared camera 130, so as to play a decorative and protective role.

[0059] Optionally, such as Figures 3 to 5As shown, the light-transmitting cover 30 is snapped onto the eye-tracking frame 21 to achieve a stable connection between the two. It can be understood that the eye-tracking frame 21 of this application has a positioning hole, and the light-transmitting cover 30 has a positioning pin that matches the positioning hole. The positioning pin is inserted into the positioning hole to achieve a stable connection between the two.

[0060] It is worth noting that the optical modules 52 on the left and right sides of the near-eye display device of this application can each be fitted with an eye-tracking module 1 for tracking the eyes. That is, the user's left and right eyeballs are respectively illuminated by infrared light, and data is collected by an infrared camera. The data is then processed by an algorithm and used in human-computer interaction. In this way, the near-eye display device of this application can achieve the function of controlling virtual scenes through eye movement by tracking the eyeballs. It can not only implement different functions based on different eye movements to achieve more interactions, but also use the collected eye data to achieve local rendering of virtual scenes, reducing energy consumption generated by other interaction methods and improving the product experience of the near-eye display device.

[0061] It is understood that the principle of the eye-tracking interaction algorithm in the eye-tracking module 1 mentioned in this application may be implemented as follows: first, an eye map is captured using an infrared camera to obtain the pupil center position through image processing technology; then, the Pulcim spot formed by the reflection of the infrared light source on the cornea is used as the base point of the relative position of the camera and the eyeball, and the gaze vector coordinates are obtained by combining the pupil center position, thereby determining the gaze point position coordinates through the angle mapping relationship.

[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. An eye tracking module for equipping a near-eye display module with eye tracking functionality, characterized in that, include: An eye-tracking component includes a flexible circuit board for electrically connecting to the near-eye display module, a plurality of light-emitting elements electrically connected to the flexible circuit board, and an imaging module electrically connected to the flexible circuit board; the flexible circuit board has a ring structure, and the plurality of light-emitting elements are arranged circumferentially on the flexible circuit board. and An eye-tracking clamping assembly includes a pair of eye-tracking frames and a pair of spacing adjustment mechanisms; the two eye-tracking frames are arranged end-to-end and fixedly connected to the flexible circuit board; the two spacing adjustment mechanisms are respectively disposed between the ends of the two eye-tracking frames to adjust the end spacing between the two eye-tracking frames, thereby forming an adjustable clamping space between the two eye-tracking frames that is adapted to the optical module of the near-eye display module.

2. The eye-tracking module of claim 1, wherein, The spacing adjustment mechanism includes a guide and an adjusting nut. The guide has a fixed end that is fixedly connected to the end of one of the eye-tracking frames and a sliding end that is slidably connected to the end of the other eye-tracking frame. The adjusting nut passes through the end of the other eye-tracking frame and is threadedly connected to the sliding end of the guide to limit the maximum end spacing between the two eye-tracking frames.

3. The eye-tracking module of claim 2, wherein, The eye-tracking frame has a sliding groove that matches the sliding end of the guide member, and the sliding end of the guide member is slidably inserted into the sliding groove of the eye-tracking frame; the adjusting nut is slidably inserted through the sliding groove and threadedly connected to the sliding end.

4. The eye-tracking module of claim 3, wherein, The spacing adjustment mechanism further includes an elastic element disposed between the ends of the two eye-tracking frames; the elastic element is a spring housed within the sliding groove, and the spring is fitted onto the adjusting nut. One end of the spring abuts against the guide member, and the other end of the spring abuts against the bottom of the sliding groove.

5. The eye-tracking module according to claim 4, characterized in that, The eye-tracking clamping assembly further includes a flexible pad and a locking ball, the flexible pad being fixed to the eye-tracking frame; the eye-tracking frame has a threaded hole that matches the locking ball, and the locking ball is threadedly connected to the eye-tracking frame to extend out of the threaded hole.

6. The eye-tracking module according to claim 5, characterized in that, The eye-tracking frame includes an arc-shaped frame for fixing the flexible circuit board, an adjustment end extending radially outward from the arc-shaped frame, and a clamping arm extending axially forward from the arc-shaped frame; the guide is fixedly connected to the adjustment end of one eye-tracking frame, and the sliding groove is formed at the adjustment end of the other eye-tracking frame; the flexible gasket is bonded to the inner surface of the clamping arm, and the threaded hole is formed in the clamping arm of the eye-tracking frame so that the locking ball threadedly connected to the threaded hole passes through the flexible gasket.

7. The eye-tracking module according to claim 6, characterized in that, The flexible circuit board includes an annular plate, a plurality of mounting plates extending forward at an incline from the inner edge of the annular plate, and a connecting plate extending forward from the outer edge of the annular plate; the light-emitting element and the imaging module are respectively electrically mounted on the rear side of the mounting plates; two eye-tracking frames are mounted on the front side of the annular plate at intervals; the eye-tracking frames further have positioning grooves formed in the arc-shaped frame, and the mounting plates are correspondingly embedded in the positioning grooves of the arc-shaped frame.

8. The eye-tracking module according to any one of claims 1 to 7, characterized in that, The light-emitting element is an infrared light source; the imaging module is an infrared camera.

9. The eye-tracking module according to any one of claims 1 to 7, characterized in that, It also includes a pair of light-transmitting covers, each of which is correspondingly placed over the eye-tracking frame to cover the eye-tracking component.

10. A near-eye display device, characterized in that, include: A near-eye display module includes a headgear and a pair of optical modules mounted on the headgear; and The eye-tracking module as described in any one of claims 1 to 9, wherein the eye-tracking module correspondingly clamps the optical module.

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