head-mounted device

Abstract

To provide a head-mounted device that maintains overlap between a virtual image and a line of sight by rotating a lens.SOLUTION: In a head-mounted device 100, a main body frame 1 is used to be mounted on a head 201 of a user 200, and a lens holder 2 is rotatably provided on the main body frame, and a lens 3 is provided thereon. The lens is used to display a virtual image 31. A monitor 4 is installed on the main body frame 1 or the lens holder 2, and monitors a state of a head of the user. The lens holder also changes an angle of the lens relative to eyes 202 of the user, and is rotated so as to move the lens to adjust a position of the virtual image within an observation range, and maintain the virtual image overlapped with a line of sight 2022 of the user.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This application relates to the technical field of virtual video devices, and more particularly to head-mounted devices. [Background technology]

[0002] A virtual image device can provide a virtual image. A user can view the virtual image provided by the virtual image device through the lens of the virtual image device. When the eyes observe the outside world, they can rotate to have a larger viewing range. However, since the virtual image screen is smaller than the viewing range, the eyes can view the entire virtual image. At the same time, the image not covered by the virtual image appears within the viewing range. On the other hand, in some head positions, the eyes may rotate and the eyes may look into areas not covered by the virtual image, making the virtual image screen invisible. Summary of the Invention [Problem to be solved by the invention]

[0003] Therefore, the present application provides a head-mounted device that can maintain the overlap between the virtual image and the line of sight of the eyes by rotating the lenses. [Means for solving the problem]

[0004] One embodiment of the present application provides a head-mounted device. The head-mounted device includes a body frame, a lens holder, a lens, and a monitor. The body frame is used to be attached to a user's head. The lens holder is rotatably attached to the body frame. The lens is attached to the lens holder. The lens is used to display a virtual image. The virtual image is smaller than an observation range. The observation range is a range that the user's eyes can see by rotating. The monitor is attached to the body frame or the lens holder. The monitor is used to monitor the state of the user's head. The lens holder can be rotated to change the angle of the lens relative to the user's eye and move and shift the lens to adjust the position of the virtual image within the observation range.

[0005] In the above embodiment, the user's eyes view the virtual image through the lenses. The viewing range of the eyes is larger than the virtual image due to the rotation of the eyes. The main frame is fixed to the head, and the lens holder rotates relative to the main frame, thereby rotating relative to the head. This changes the angle of the lens relative to the eyes, thereby moving the lenses to change the position of the virtual image relative to the eyes. Because the lenses are located between the virtual image and the eyes, small adjustments to the lenses can significantly change the position of the virtual image. At the same time, the monitor monitors the status information of the head, and determines the relative position of the eyes' line of sight within the viewing range. This is compared with the relative position of the virtual image within the viewing range, and the angle of the lens relative to the eyes is adjusted to quickly achieve overlap between the virtual image and the eyes' line of sight.

[0006] In some embodiments of the present application, the state of the user's head includes a gaze position of the user's eyes, and the monitor includes an eye tracker provided in the lens holder for tracking the gaze position of the user's eyes; When the eye tracker tracks that the line of sight of the user's eye falls to a position within the observation range that is not covered by the virtual image, the lens holder rotates to change the position of the virtual image within the observation range; When the eye tracker tracks the user's eye gaze to fall on a position covered by the virtual image within the observation range, the lens holder is fixed relative to the body frame so that the position of the virtual image within the observation range is fixed.

[0007] In the above-described embodiment, the eye gaze position is one of the head states, and the eye tracker is mounted on the lens holder facing the eye to monitor the eye gaze position. By monitoring the eye gaze position, the relative position of the eye gaze within the observation range can be obtained by directly comparing it with the observation range. This allows the lens angle to be adjusted so that the virtual image moves to the gaze position when the virtual image does not overlap with the gaze position, or the lens angle to be fixed so that the virtual image remains aligned with the gaze position when the virtual image and the gaze position overlap.

[0008] In some embodiments of the present application, the head-mounted device further includes an analysis control module and a driving module, the analysis control module and the driving module being mounted on the body frame or the lens holder; the analysis and control module is electrically connected to the eye tracker and the driving module, and receives and analyzes gaze position signals of the user's eyes monitored by the eye tracker; When the analysis and control module determines that the line of sight of the user's eyes falls on a position within the observation range that is not covered by the virtual image, the analysis and control module controls the drive module to rotate the lens holder relative to the body frame; When the analysis and control module determines that the line of sight of the user's eyes falls on a position covered by the virtual image within the observation range, it controls the drive module to keep the lens holder fixed relative to the body frame.

[0009] In the above embodiment, the eye tracker monitors the gaze position of the eye, converts it into a signal, and transmits it to the analysis and control module. The analysis and control module can analyze the signal to determine the position of the gaze within the observation range. In this way, the deviation between the gaze position of the eye and the virtual image and the deviation position can be obtained. Then, the analysis and control module controls what driving operation the driving module performs on the lens holder, and rotates the lens holder or keeps the lens holder fixed, automatically completing the superposition calibration between the virtual image and the gaze of the eye.

[0010] In some embodiments of the present application, the state of the user's head includes a rotation angle of the user's head, the monitor includes an inertial measurement unit; the inertial measurement unit is provided on the body frame and is used to monitor a rotation angle of the user's head; when the inertial measurement unit monitors that the user's head has rotated beyond a predetermined angle from an initial position of the head, the lens holder rotates to change the position of the virtual image within the observation field; When the inertial measurement unit monitors that the user's head has not rotated more than a predetermined angle from the initial position of the head, the lens holder is fixed relative to the main body frame and the position of the virtual image within the observation range is fixed.

[0011] In the above embodiment, the rotation angle of the head is one of the head states. The inertial measurement unit is mounted on the main frame 1, which is fixed relative to the head. The inertial measurement unit measures the three-axis attitude angle and acceleration of the head, and can further obtain the rotation angle of the head. Meanwhile, since the eyes rotate along with the head when it rotates, the gaze position of the eyes can be determined by monitoring the rotation angle of the head. The relative position of the gaze of the eyes within the observation range can be obtained by indirectly comparing it with the observation range. This allows the lens angle to be adjusted so that the virtual image moves to the gaze position when the virtual image and the gaze position do not overlap. Alternatively, when the virtual image and the gaze position overlap, the lens angle can be fixed to maintain the overlap between the virtual image and the gaze position.

[0012] In some embodiments of the present application, the head-mounted device further includes an analysis control module and a driving module, the analysis control module and the driving module being mounted on the body frame or the lens holder; the analysis and control module is electrically connected to the eye tracker and the driving module, respectively, and receives and analyzes the rotation angle signal of the user's head monitored by the eye tracker; When the analysis and control module determines that the rotation angle of the user's head exceeds the predetermined angle, the analysis and control module controls the drive module to rotate the lens holder relative to the body frame; When the analysis and control module determines that the rotation angle of the user's head does not exceed the predetermined angle, it controls the drive module to maintain the lens holder fixed to the body frame.

[0013] In the above embodiment, the inertial measurement unit monitors the rotation angle of the head, converts it into a signal, and transmits it to the analysis and control module. The analysis and control module analyzes the signal to analyze the rotation angle of the eye according to the magnitude of the rotation angle of the head, thereby obtaining the gaze position of the eye, and determining the gaze position within the observation range, and further obtaining whether the gaze position of the eye is misaligned with the virtual image and the position of the misalignment. Then, the analysis and control module controls what driving operation the driving module performs on the lens holder, and rotates the lens holder or keeps the lens holder fixed, thereby automatically completing the superposition calibration between the virtual image and the gaze of the eye.

[0014] In some embodiments of the present application, the head-mounted device further includes a rotation shaft, and the lens holder is rotatably connected to the main body frame via the rotation shaft; The lens holder rotates relative to the body frame to change the angle of the lens relative to the user's eye.

[0015] In the above embodiment, the lens holder is rotatable around a rotation axis, and therefore rotatable relative to the main frame. When the lens is fixed to the lens holder, the lens holder moves the lens and rotates it relative to the main frame. Meanwhile, the position of the main frame relative to the eye is fixed. This allows the angle of the lens relative to the eye to be changed, adjusting the position of the virtual image within the observation range so that the virtual image overlaps with the line of sight of the eye.

[0016] In some embodiments of the present application, the number of the lens holder is one, and the lens holder is provided with two of the lenses, and the two lenses are used to display the virtual image to two eyes of the user, respectively; When the lens holder rotates, the angles of the two lenses are equal to the angles that the corresponding user's eyes change.

[0017] In the above embodiment, the rotation direction and angle of the user's two eyes are the same. By simultaneously moving and moving the two lenses through one lens holder, and synchronously changing the angles between the two lenses and the corresponding eyes while maintaining the same angles between the two lenses and the corresponding eyes, the gaze positions of the two eyes can be simultaneously superimposed on the virtual image, avoiding a situation where one eye can see the virtual image screen but the other eye cannot.

[0018] In some embodiments of the present application, the head-mounted device further includes a slide rail and a slider, wherein one of the main body frame and the lens holder has a first arc surface and the other has the slider, the slide rail is arranged along the first arc surface, and the slider is slidably arranged on the slide rail, thereby allowing the lens holder to slide relative to the main body frame to change the angle of the lens relative to the user's eye.

[0019] In the above embodiment, the slider and slide rail cooperate to allow the lens holder to slide relative to the main frame, and the sliding direction of the lens holder is the extension direction of the slide rail. The slide rail extends along a first arc surface of the main frame. Therefore, the lens holder can slide and rotate relative to the main frame, but the lens is fixed relative to the lens holder, and the position of the main frame relative to the eye is fixed. This allows the angle of the lens relative to the eye to be changed, adjusting the position of the virtual image within the observation range so that it overlaps with the line of sight of the eye.

[0020] In some embodiments of the present application, the body frame includes a head ring that is attached to a user's head in a ring shape, and the lens holder is rotatable relative to the head ring.

[0021] In the above embodiment, the head ring is attached to the head and is stopped by the head in multiple directions to prevent movement. By fixing the position of the head ring relative to the head, the lens holder can be rotated relative to the head ring, allowing the lens holder to rotate relative to the head. This allows the lens to be moved to change its angle relative to the eye, so that the virtual image and the line of sight of the eye overlap.

[0022] In some embodiments of the present application, the main body frame further includes a fixing pad provided on the head ring, the fixing pad having a second arc surface that is attached to the user's forehead to fix the head ring to the user's head, and the lens holder is rotatably provided on the fixing pad.

[0023] In the above embodiment, the head ring is provided with a fixing pad, and the head ring is attached to the head, and the second arc surface of the fixing pad abuts against the user's forehead, thereby strengthening the stability of the relative positions of the head ring, the fixing pad, and the head. As a result, when the lens holder rotates relative to the fixing pad to move the lens and change the angle relative to the eye, the angle between the lens and the eye is not affected by the movement of the head ring and the fixing pad relative to the head, and the lens holder moves the lens to stably change the angle relative to the eye, so that the position of the virtual image and the line of sight of the eye can be stably matched. [Brief explanation of the drawings]

[0024] In order to more clearly explain the technical aspects of the embodiments of the present application, the drawings in the embodiments are briefly described below, but it should be understood that the following drawings only show some embodiments of the present application and should not be considered as limiting the scope. [Figure 1] 1 is a structural schematic diagram of a head-mounted device when the monitor according to an embodiment of the present application is an eye tracker and is attached to a user's head; [Figure 2]10 is a flowchart showing how the head-mounted device of FIG. 1 controls the rotation of the lens. [Figure 3] 1 is a structural schematic diagram of a head-mounted device in which a monitor according to an embodiment of the present application is an inertial measurement unit, when the head-mounted device is attached to a user's head. [Figure 4] 4 is a flowchart when the head-mounted device of FIG. 3 controls the rotation of the lens. DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, technical aspects of the embodiments of the present application will be described in conjunction with the drawings of the embodiments of the present application, but obviously, the described embodiments are only some of the embodiments of the present application, and not all of the embodiments.

[0026] In the description of this application, the orientations or positional relationships indicated by terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are orientations or positional relationships based on the drawings, and are intended merely to facilitate and simplify the description of this application. They do not indicate or imply that a specified device or element has a particular orientation or is constructed and operated in a particular orientation, and should not be understood as a limitation on this application.

[0027] It should be noted that when a component is referred to as being "attached" to another component, it may be directly attached to the other component or may be attached to the other component through an intermediary. When a component is referred to as being "connected" to another component, it may be directly connected to the other component, or there may be intermediary media involved. When a component is referred to as being "mounted" to another component, it may be directly mounted to the other component, or there may be intermediary media involved.

[0028] 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. The terms used in the specification of this application are for the purpose of describing particular embodiments only and are not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0029] A head-mounted device according to an embodiment of the present application includes a body frame, a lens holder, a lens, and a monitor. The body frame is used to be attached to a user's head. The lens holder is rotatably attached to the body frame. The lens is attached to the lens holder. The lens is used to display a virtual image. The virtual image is smaller than the observation range. The observation range is the range that the user's eyes can see by rotating. The monitor is attached to the body frame or the lens holder. The monitor is used to monitor the state of the user's head. The lens holder can be rotated to move the lens in order to change the angle of the lens relative to the user's eye and adjust the position of the virtual image within the observation range.

[0030] The user's eyes view the virtual image through the lens. The viewing range of the eyes is larger than the virtual image as the eyes rotate. The main frame is fixed to the head, and the lens holder rotates relative to the main frame, thereby rotating relative to the head. This changes the angle of the lens relative to the eye, thereby moving the lens and changing the position of the virtual image relative to the eye. Because the lens is located between the virtual image and the eye, small adjustments to the lens can significantly change the position of the virtual image. At the same time, the monitor monitors the status information of the head, determining the relative position of the eye's line of sight within the viewing range. This is compared with the relative position of the virtual image within the viewing range, and the angle of the lens relative to the eye is adjusted to quickly achieve overlap between the virtual image and the eye's line of sight.

[0031] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, several embodiments of the present application will be described in detail with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other if not inconsistent.

[0032] As shown in FIGS. 1 and 3 , a head-mounted device 100 according to an embodiment of the present application includes a main body frame 1, a lens holder 2, a lens 3, and a monitor 4. The main body frame 1 is to be attached to a head 201 of a user 200. The lens holder 2 is rotatably provided on the main body frame 1. The lens 3 is provided on the lens holder 2. The lens 3 is used to display a virtual image 31. The virtual image 31 is smaller than an observation range 2021. The observation range 2021 is a range that can be seen by rotating the eyes 202 of the user 200. The monitor 4 is provided on the main body frame 1 or the lens holder 2. The monitor 4 is used to monitor the state of the head 201 of the user 200. The state of the head 201 of the user 200 is monitored by the monitor 4. The lens holder 2 can be rotated to move and displace the lens 3 so as to change the angle of the lens 3 relative to the eye 202 of the user 200 and adjust the position of the virtual image 31 within the viewing field 2021 .

[0033] The eye 202 of the user 200 views the virtual image 31 through the lens 3. The observation range 2021 that can be seen by the eye 202 as it rotates is larger than the virtual image 31. The main body frame 1 is fixed to the head 201. The lens holder 2 is rotatable relative to the head 201 by rotating relative to the main body frame 1. The lens holder 2 moves and displaces the lens 3 so that the angle of the lens 3 relative to the eye 202 changes, thereby changing the position of the virtual image 31 relative to the eye 202. Because the lens 3 is located between the virtual image 31 and the eye 202, the position of the virtual image 31 can be changed significantly by adjusting the lens 3 slightly. At the same time, based on the status information of the head 201 monitored by the monitor 4, the relative position of the line of sight 2022 of the eye 202 in the observation range 2021 is determined, and compared with the relative position of the virtual image 31 within the observation range 2021, the angle of the lens 3 relative to the eye 202 is adjusted, and the virtual image 31 and the line of sight 2022 of the eye 202 are quickly brought into overlap with each other.

[0034] In some embodiments, the virtual image 31 includes, but is not limited to, an AR virtual image 31, a VR virtual image 31, and an MR virtual image 31. In some embodiments, the virtual image 31 displayed by the lens 3 has a fixed angle relative to the lens 3.

[0035] In some embodiments, the eye 202 can rotate to view an area outside the range of the lens 3. The observation range 2021 is larger than the portion of the viewable area of ​​the eye 202 through the lens 3. At the same time, the area of ​​the viewable area of ​​the eye 202 through the lens 3 is larger than the virtual image 31. That is, when the eye 202 looks through the lens 3, some area is not yet covered by the virtual image 31. The lens holder 2 rotates to change the angle of the lens 3 relative to the eye 202 to adjust the position of the virtual image 31 within the observation range 2021. Note that in some embodiments, the eye 202 can rotate to view an area outside the range of the lens 3. The observation range 2021 is larger than the portion of the viewable area of ​​the eye 202 through the lens 3. At the same time, the virtual image 31 can cover the entire viewable area of ​​the viewable area of ​​the eye 202 through the lens 3. Similarly, by rotating the lens holder 2, the lens 3 changes its angle relative to the eye 202 to adjust the position of the virtual image 31 within the observation range 2021.

[0036] As shown in FIGS. 1 and 3 , in some embodiments, the head-mounted device 100 further includes a rotation axis 5. The lens holder 2 is rotatably connected to the main body frame 1 via the rotation axis 5. The lens holder 2 rotates relative to the main body frame 1 to change the angle of the lens 3 relative to the eye 202 of the user 200. The lens holder 2 is rotatable around the rotation axis 5 and is therefore rotatable relative to the main body frame 1. When the lens 3 is fixed to the lens holder 2, the lens holder 2 moves and rotates the lens 3 relative to the main body frame 1. Meanwhile, the position of the main body frame 1 relative to the eye 202 is fixed. This changes the angle of the lens 3 relative to the eye 202, adjusting the position of the virtual image 31 within the observation range 2021 so that the virtual image 31 overlaps with the line of sight 2022 of the eye 202.

[0037] In some embodiments, the lens holder 2 is fixedly connected to the rotation shaft 5, and the driving module drives and rotates the rotation shaft 5 to rotate the lens holder 2. The rotation shaft 5 is an electric rotation shaft 5.

[0038] As shown in FIGS. 1 and 2 , in some embodiments, the state of the head 201 of the user 200 includes the position of the line of sight 2022 of the eye 202 of the user 200. The monitor 4 includes an eye tracker 41. The eye tracker 41 is provided in the lens holder 2. The eye tracker 41 is used to track the position of the line of sight 2022 of the eye 202 of the user 200. When the eye tracker 41 tracks that the line of sight 2022 of the eye 202 of the user 200 falls into a position within the observation range 2021 that is not covered by the virtual image 31, the lens holder 2 rotates to change the position of the virtual image 31 within the observation range 2021. When the eye tracker 41 tracks that the line of sight 2022 of the eye 202 of the user 200 falls into a position within the observation range 2021 that is covered by the virtual image 31, the lens holder 2 is fixed relative to the body frame 1, and the position of the virtual image 31 within the observation range 2021 is fixed. The position of the line of sight 2022 of the eye 202 is one of the states of the head 201, and the eye movement tracker 41 is mounted on the lens holder 2 so as to face the eye 202 and monitors the position of the line of sight 2022 of the eye 202. By monitoring the position of the line of sight 2022 of the eye 202, the relative position of the line of sight 2022 of the eye 202 within the observation range 2021 can be obtained by directly comparing it with the observation range 2021. This makes it possible to adjust the angle of the lens 3 so that the virtual image 31 moves to the position of the line of sight 2022 when the position of the virtual image 31 does not overlap with the position of the line of sight 2022, or to fix the angle of the lens 3 to maintain the virtual image 31 aligned with the position of the line of sight 2022 when the positions of the virtual image 31 and the line of sight 2022 overlap. In some embodiments, the eye movement tracker 41 further includes a camera mounted on the lens holder 2 and facing the eye 202. This camera can track the line of sight 2022 of the eye 202 based on changes in the characteristics of the eyeball and its surroundings, or can track the line of sight 2022 of the eye 202 based on changes in the angle of the iris, and can also track the line of sight 2022 of the eye 2022 by actively projecting a beam of light such as infrared light onto the iris to extract features.

[0039] As shown in FIGS. 1 and 2 , in some embodiments, the virtual image 31 has an uncovered position between the observation range 2021 and the lower limit of the observation range 2021. When the eye movement tracker 41 tracks that the line of sight 2022 of the user's 200 eye 202 is deflected downward to a certain angle, it determines that the line of sight 2022 of the user's 200 eye 202 falls within the lower region of the virtual image 31 within the observation range 2021, and the lens holder 2 rotates so that the lower edge of the lens 3 is closer to the eye 202 than the upper edge, thereby changing the angle of the lens 3 relative to the eye 202 and re-overlapping the virtual image 31 with the line of sight 2022 of the eye 202. Typically, the user 200 looks at something close, especially at a position that is deflected downward from direct vision. The user 200 tends to rotate the eye 202 to view the screen rather than lowering their head. On the other hand, the user 200 tends to rotate their head to view the screen when looking to the left, right, or upward.

[0040] As shown in FIGS. 1 and 2 , in some embodiments, the head-mounted device 100 further includes an analysis control module (not shown) and a drive module (not shown). The analysis control module and the drive module are provided on the body frame 1 or the lens holder 2. The analysis control module is electrically connected to the eye movement tracker 41 and the drive module, respectively. The analysis control module can receive and analyze a position signal of the line of sight 2022 of the eye 202 of the user 200 monitored by the eye movement tracker 41. When the analysis control module determines that the line of sight 2022 of the eye 202 of the user 200 has fallen into a position not covered by the virtual image 31 within the observation range 2021, it controls the drive module to rotate the lens holder 2 relative to the body frame 1. When the analysis control module determines that the line of sight 2022 of the eye 202 of the user 200 has fallen into a position covered by the virtual image 31 within the observation range 2021, it controls the drive module to maintain the lens holder 2 fixed relative to the body frame 1. The eye movement tracker 41 monitors the position of the line of sight 2022 of the eye 202, converts it into a signal, and transmits it to the analysis and control module. The analysis and control module can analyze the signal to determine the position of the line of sight 2022 within the observation range 2021. In this way, the deviation between the position of the line of sight 2022 of the eye 202 and the virtual image 31 and the deviation position can be obtained. Then, the analysis and control module controls what driving operation the driving module performs on the lens holder 2, and rotates the lens holder 2 or keeps the lens holder 2 fixed, thereby automatically completing the superposition calibration of the virtual image 31 and the line of sight 2022 of the eye 202. It is understood that in some embodiments, the electrical communication connection may be an electrical connection or a signal connection, as long as it can realize the transmission of a signal.

[0041] In some embodiments, the analysis control module includes, but is not limited to, an SoC chip.

[0042] As shown in FIGS. 3 and 4 , in some embodiments, the state of the head 201 of the user 200 includes a rotation angle of the head 201 of the user 200. The monitor 4 includes an inertial measurement unit 42. The inertial measurement unit 42 is provided on the body frame 1. The inertial measurement unit 42 is used to monitor the rotation angle of the head 201 of the user 200. When the inertial measurement unit 42 monitors that the head 201 of the user 200 has rotated beyond a predetermined angle from the initial position of the head 201, the lens holder 2 rotates to change the position of the virtual image 31 within the observation range 2021. When the inertial measurement unit 42 monitors that the rotation angle of the head 201 of the user 200 has not exceeded a predetermined angle from the initial position of the head 201, the lens holder 2 is fixed relative to the body frame 1, and the position of the virtual image 31 within the observation range 2021 is fixed. The rotation angle of the head 201 is one of the states of the head 201. The inertial measurement unit 42 is mounted on the main frame 1, which is fixed relative to the head 201. The inertial measurement unit 42 measures the three-axis attitude angle and acceleration of the head 201, and can further obtain the rotation angle of the head 201. Meanwhile, when the head 201 rotates, the eye 202 also rotates accordingly. Therefore, by monitoring the rotation angle of the head 201, the position of the line of sight 2022 of the eye 202 can be determined, and by indirectly comparing it with the observation range 2021, the relative position of the line of sight 2022 of the eye 202 within the observation range 2021 can be obtained. This allows the angle of the lens 3 to be adjusted so that the virtual image 31 moves to the position of the line of sight 2022 when the positions of the virtual image 31 and the line of sight 2022 do not overlap. Alternatively, when the positions of the virtual image 31 and the line of sight 2022 overlap, the angle of the lens 3 can be fixed to maintain the overlap between the positions of the virtual image 31 and the line of sight 2022. In some embodiments, the inertial measurement unit 42 is an IMU, which includes three single-axis accelerometers and three single-axis gyroscopes to measure the angular velocity and acceleration of the head 201 in three-dimensional space and thereby calculate the rotation angle of the head 201.

[0043] As shown in FIGS. 3 and 4 , in some embodiments, the virtual image 31 has an uncovered portion between the observation range 2021 and the lower limit of the observation range 2021. After monitoring the head 201 to rotate downward to a certain angle, the inertial measurement unit 42 determines that the line of sight 2022 of the user's 200 eye 202 falls into the area below the virtual image 31 within the observation range 2021. The lens holder 2 then rotates the lower edge of the lens 3 closer to the eye 202 than the upper edge, thereby changing the angle of the lens 3 relative to the eye 202 and causing the virtual image 31 to again overlap with the line of sight 2022 of the eye 202. Typically, when the user 200 looks to the left, right, up, or down, the rotation of the head 201 aligns with the rotation of the eye 202 to view the target position. For example, when the user lowers their head to look at the ground, the eye 202 is tilted downward by approximately 15°. In this case, by moving the lens 3 via the lens holder 2, the virtual image 31 is downshifted, thereby eliminating a downward tilt deviation of about 15° of the eyes 202 when the head is lowered. Also, when the user 200 looks straight ahead, the eyes 202 have a downward tilt of about 5°, and by moving the lens 3 via the lens holder 2 and downshifting the virtual image 31, the downward tilt deviation of about 5° of the eyes 202 when looking straight ahead can be eliminated.

[0044] 3 and 4, in some embodiments, the analysis and control module is electrically connected to the inertial measurement unit 42 and the driving module, respectively. The analysis and control module can receive and analyze the rotation angle signal of the head 201 of the user 200 monitored by the inertial measurement unit 42. If the analysis and control module determines that the rotation angle of the head 201 of the user 200 exceeds a predetermined angle, it controls the driving module to rotate the lens holder 2 relative to the body frame 1. If the analysis and control module determines that the rotation angle of the head 201 of the user 200 does not exceed the predetermined angle, it controls the driving module to maintain the lens holder 2 fixed relative to the body frame 1. The inertial measurement unit 42 monitors the rotation angle of the head 201, converts it into a signal, and transmits it to the analysis and control module. The analysis control module analyzes this signal and analyzes the rotation angle of the eye 202 based on the magnitude of the rotation angle of the head 201, thereby obtaining the position of the line of sight 2022 of the eye 202 and determining the position of the line of sight 2022 within the observation range 2021, and further obtaining whether the position of the line of sight 2022 of the eye 2022 deviates from the virtual image 31 and the position of the deviation. Thereafter, the analysis control module controls what driving operation the driving module performs on the lens holder 2, and rotates the lens holder 2 or keeps the lens holder 2 fixed, thereby automatically completing the superposition calibration of the virtual image 31 and the line of sight 2022 of the eye 202.

[0045] In other embodiments, the state of the head 201 may also include sounds heard by the ears. After hearing the sound, the user 200 rotates the eyes 202 to look at the location where the sound is coming from. Therefore, the lens holder 2 rotates and moves the lens 3 to change the angle of the lens 3 relative to the eyes 202 of the user 200, thereby adjusting the position of the virtual image 31 within the observation range 2021.

[0046] As shown in FIGS. 1 and 3 , in some embodiments, the number of lens holders 2 is one, and the lens holder 2 includes two lenses 3, which are used to display a virtual image 31 to two eyes 202 of a user 200, respectively. When the lens holder 2 rotates, the angles of the two lenses 3 are equal to the angles of the corresponding eyes 202 of the user 200. The rotation direction and magnitude of the angles of the two eyes 202 of the user 200 are the same. By simultaneously moving the two lenses 3 via one lens holder 2, synchronously changing the angles between the two lenses 3 and the corresponding eyes 202, and maintaining the angles between the two lenses 3 and the corresponding eyes 202 equal, the positions of the lines of sight 2022 of the two eyes 202 can be simultaneously superimposed on the virtual image 31, thereby avoiding a situation where one eye 202 can see the screen of the virtual image 31 but the other eye 202 cannot see the screen of the virtual image 31. In some embodiments, when user 200 is standing upright and looking straight ahead, and wearing head-mounted device 100 , axis of rotation 5 is vertically higher than eyes 202 and lenses 3 .

[0047] In some embodiments, the head-mounted device 100 further includes a slide rail (not shown) and a slider (not shown). A first arcuate surface 121 is provided on one of the main body frame 1 and the lens holder 2, and a slider is provided on the other. The slide rail is provided along the first arcuate surface 121, and the slider is slidably provided on the slide rail. This allows the lens holder 2 to slide relative to the main body frame 1 and change the angle of the lens 3 relative to the eye 202 of the user 200. Cooperation between the slider and the slide rail allows the lens holder 2 to slide relative to the main body frame 1, and the sliding direction of the lens holder 2 is the extension direction of the slide rail. The slide rail extends along the first arcuate surface 121 of the main body frame 1. Therefore, the lens holder 2 can slide and rotate relative to the main body frame 1 at the same time, but the lens 3 is fixed relative to the lens holder 2, and the position of the main body frame 1 relative to the eye 202 is fixed. This allows the angle of the lens 3 relative to the eye 202 to be changed, and the position of the virtual image 31 within the observation range 2021 to be adjusted so that the virtual image 31 and the line of sight 2022 of the eye 202 overlap.

[0048] 1 and 3 , in some embodiments, the main body frame 1 includes a head ring 11 that is attached in a ring shape to the head 201 of the user 200. The lens holder 2 is rotatable relative to the head ring 11. The head ring 11 is attached to the head 201 and is stopped by the head 201 in multiple directions so that it cannot move. When the position of the head ring 11 is fixed relative to the head 201 in this way, the lens holder 2 can be rotated relative to the head ring 11, thereby allowing the lens holder 2 to rotate relative to the head 201. This moves the lens 3 to change the angle relative to the eye 202, so that the virtual image 31 and the line of sight 2022 of the eye 202 overlap each other.

[0049] 1 and 3, in some embodiments, the body frame 1 further includes a fixing pad 12 provided on the head ring 11. The fixing pad 12 has a second arc surface 122 that is attached to the forehead of the user 200 to fix the head ring 11 to the head 201 of the user 200. The lens holder 2 is rotatably provided on the fixing pad 12. The head ring 11 is provided with the fixing pad 12, and the head ring 11 is attached to the head 201. The second arc surface 122 of the fixing pad 12 abuts against the forehead of the user 200, thereby enhancing the stability of the relative positions of the head ring 11, the fixing pad 12, and the head 201. As a result, when the lens holder 2 rotates relative to the fixed pad 12 to move the lens 3 and change the angle relative to the eye 202, the angle between the lens 3 and the eye 202 is not affected by the movement of the head ring 11 and the fixed pad 12 relative to the head 201, and the lens holder 2 moves the lens 3 to stably change the angle relative to the eye 202, so that the positions of the virtual image 31 and the line of sight 2022 of the eye 202 can be stably matched.

[0050] In the present application, the eye 202 of the user 200 views the virtual image 31 through the lens 3, and the observation range 2021 visible by the eye 202 as it rotates is larger than the virtual image 31. The main frame 1 is fixed to the head 201, and the lens holder 2 rotates relative to the main frame 1, thereby allowing it to rotate relative to the head 201. By moving the lens 3 so that the angle of the lens 3 relative to the eye 202 changes, the position of the virtual image 31 relative to the eye 202 can be changed. Because the lens 3 is located between the virtual image 31 and the eye 202, the position of the virtual image 31 can be changed significantly by small adjustments of the lens 3. At the same time, based on status information of the head 201 monitored by the monitor 4, the relative position of the line of sight 2022 of the eye 202 within the observation range 2021 is determined, and compared with the relative position of the virtual image 31 within the observation range 2021, the angle of the lens 3 relative to the eye 202 is adjusted to quickly achieve overlap between the virtual image 31 and the line of sight 2022 of the eye 202.

[0051] The above embodiments are only used to describe the technical aspects of the present application, and do not limit the present invention. Although the present application has been described in detail with reference to the above preferred embodiments, those skilled in the art will recognize that any modifications or equivalent replacements to the technical aspects of the present application will fall within the spirit and scope of the present invention.

[0052] The information disclosed in the Background section of this application is intended only to facilitate understanding of the overall background of this application and is not an admission or in any way suggestion that such information constitutes prior art known to those skilled in the art. [Explanation of symbols]

[0053] 100 Head-mounted device 1 Main frame 11 Head Ring 12 Fixation Pads 121 First Arc 122 Second Arc 2 Lens holder 3 Lenses 31 Virtual Image 4 monitors 41 Eye movement tracker 42 Inertial Measurement Unit 5 Rotation Axis 200 users 201 head 202 eyes 2021 Observation Range 2022 Gaze

Claims

1. A main frame to be attached to the user's head, a lens holder rotatably provided on the main body frame; a lens provided in the lens holder and used to display a virtual image; a monitor provided on the main body frame or the lens holder for monitoring the state of the user's head, The virtual image is smaller than the observation range, and the observation range is a range that can be seen by rotating the user's eyes, According to the state of the user's head monitored by the monitor, the lens holder rotates to change the angle of the lens relative to the user's eye, thereby adjusting the position of the virtual image within the observation range; the state of the user's head includes a rotation angle of the user's head; the monitor includes an inertial measurement unit; the inertial measurement unit is provided on the body frame and is used to monitor a rotation angle of the user's head; when the inertial measurement unit monitors that the user's head has rotated beyond a predetermined angle from an initial position of the head, the lens holder rotates to change the position of the virtual image within the observation field; When the inertial measurement unit monitors that the rotation angle of the user's head does not exceed a predetermined angle from the initial position of the head, the lens holder is fixed to the body frame, and the position of the virtual image within the observation range is fixed. A head-mounted device characterized by:

2. the head-mounted device further includes an analysis control module and a driving module, the analysis control module and the driving module being provided on the body frame or the lens holder; the analysis and control module is electrically connected to the inertial measurement unit and the driving module, respectively, and receives and analyzes a rotation angle signal of the user's head monitored by the inertial measurement unit; When the analysis and control module determines that the rotation angle of the user's head exceeds the predetermined angle, the analysis and control module controls the drive module to rotate the lens holder relative to the body frame; When the analysis and control module determines that the rotation angle of the user's head does not exceed the predetermined angle, the analysis and control module controls the drive module to maintain the lens holder fixed to the body frame.

2. The head-mounted device according to claim 1.

3. the head-mounted device further includes a rotation shaft, the lens holder is rotatably connected to the main body frame via the rotation shaft, The lens holder rotates relative to the body frame to change the angle of the lens relative to the user's eye.

3. The head-mounted device according to claim 1 or 2.

4. the number of the lens holder is one, and two of the lenses are provided in the lens holder, and the two lenses are used to display the virtual image to two eyes of the user, respectively; When the lens holder rotates, the angles of the two lenses are equal to the angles of the corresponding user's eyes.

4. The head-mounted device according to claim 3.

5. The head-mounted device further includes a slide rail and a slider, wherein a first arc surface is provided on one of the main body frame and the lens holder, and the slider is provided on the other, the slide rail is provided along the first arc surface, and the slider is slidably provided on the slide rail, whereby the lens holder slides relative to the main body frame to change the angle of the lens relative to the user's eye.

3. The head-mounted device according to claim 1 or 2.

6. The main body frame includes a head ring that is attached to a user's head in a ring shape, and the lens holder is rotatable relative to the head ring.

3. The head-mounted device according to claim 1 or 2.

7. The main body frame further includes a fixing pad provided on the head ring, the fixing pad having a second arc surface, the second arc surface being attached to a user's forehead to fix the head ring to the user's head, and the lens holder being rotatably provided on the fixing pad.

7. The head-mounted device according to claim 6.

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