Head-mounted display device, focal point position adjustment method, and computer-readable storage medium

Abstract

The application discloses a head-mounted display device, a focal point position adjusting method and a computer readable storage medium, and relates to the technical field of head-mounted devices. The head-mounted display device comprises a shell, a prescription lens and a display module. The prescription lens has opposite first and second surfaces. Ambient light received by the first surface can be emitted through the second surface. The display module emits light towards the second surface. The second surface can reflect light of the display module. The display module comprises a light source and an imaging lens which are distributed in the direction from upstream to downstream of the light path. At least one of the light source and the imaging lens is configured as a movable part relative to the shell, so that the focal point position of the virtual image corresponding to the display module can be adjusted. The technical scheme provided by the application aims to adjust the focal point position of the virtual image of the head-mounted display device according to the vision state of the user.

Description

Technical Field

[0001] This invention relates to the field of head-mounted device technology, and in particular to a head-mounted display device, a focus position adjustment method, and a computer-readable storage medium. Background Technology

[0002] When nearsighted or farsighted users wear AR glasses, the focal point of the virtual image deviates from their retina, resulting in a blurry image that fails to provide a clear visual experience. Summary of the Invention

[0003] The main objective of this invention is to provide a head-mounted display device, a focus position adjustment method, and a computer-readable storage medium, which enables the focus position of the virtual image of the head-mounted display device to be adjusted according to the user's visual state.

[0004] To achieve the above objectives, the head-mounted display device proposed in this invention includes:

[0005] case;

[0006] Prescription lenses, mounted in the housing, the prescription lenses having opposing first and second surfaces, wherein ambient light received on the first surface can be emitted through the second surface; and

[0007] A display module is mounted on the housing and emits light toward the second surface, which can reflect the light from the display module. The display module includes a light source and an imaging lens distributed sequentially in the direction from upstream to downstream of the light path. At least one of the light source and the imaging lens is configured as a movable member relative to the housing, so that the focal position of the virtual image corresponding to the display module is adjustable.

[0008] In one embodiment, the imaging lens is configured as a lens with optical power, and the lens, as the movable element, is movably disposed in the extension direction of its optical axis.

[0009] In one embodiment, a reflector is provided downstream of the optical path of the lens, and the reflected light from the reflector is projected onto the second surface. The reflector is movably disposed.

[0010] In one embodiment, the light source is configured as a point light source or a point light source-like light source, and the lens is used to diverge the emitted light rays from the light source.

[0011] In one embodiment, the lens is configured as a freeform lens.

[0012] In one embodiment, the head-mounted display device further includes a drive unit configured as at least one of an electric drive device and a manual drive unit, the electric drive device being drivenly connected to the movable member, and the manual drive unit being exposed outside the housing and drivenly connected to the movable member.

[0013] In one embodiment, the driving member is connected to the movable member via a gear and rack structure.

[0014] In one embodiment, the head-mounted display device further includes a controller configured to control the operation of the electric drive device after acquiring visual information, such that the focal position of the virtual image corresponding to the display module is adapted to the visual information.

[0015] In one embodiment, the head-mounted display device further includes at least one of a sensor, an input module, and a communication module electrically connected to the controller;

[0016] The sensor is used to detect the user's eyes or prescription lenses to obtain the vision information;

[0017] The input module is used to allow users to input the vision information;

[0018] The communication module is configured to communicate with an electronic terminal to receive the vision information input by the user from the electronic terminal.

[0019] In one embodiment, the sensor is configured as at least one of a wavefront sensor, an optical coherence tomography sensor, an automatic refractive measurement sensor, an eye-tracking sensor, a corneal reflection sensor, and an adaptive optics sensor.

[0020] In one embodiment, the controller includes an AI analysis unit.

[0021] In one embodiment, the head-mounted display device is configured as AR glasses, the housing including a frame and temples, at least one of the nose pad of the frame and the temples being fitted with the display module.

[0022] The present invention also proposes a focus position adjustment method, applied to a head-mounted display device, the head-mounted display device comprising:

[0023] case;

[0024] A prescription lens is mounted on the housing. The prescription lens has a first surface and a second surface opposite to each other. Ambient light received on the first surface can be emitted through the second surface.

[0025] A display module, mounted on the housing, emits light toward a second surface, the second surface being capable of reflecting the light from the display module. The display module includes a light source and an imaging lens sequentially distributed in a direction from upstream to downstream of the optical path. At least one of the light source and the imaging lens is configured as a movable member relative to the housing.

[0026] A controller and an electric drive unit, wherein the electric drive unit is driven and connected to the movable part, and the controller is electrically connected to the electric drive unit;

[0027] The focus position adjustment method includes:

[0028] Obtaining vision information; and

[0029] The electric drive device is controlled to operate based on the vision information, thereby driving the movable component to move, so that the focal position of the virtual image corresponding to the display module is adapted to the vision information.

[0030] In one embodiment, the head-mounted display device further includes at least one of a sensor, an input module, and a communication module electrically connected to the controller, and the step of acquiring vision information specifically includes:

[0031] Acquire visual information from the sensor's detection of the user's eyes or prescription lenses;

[0032] And / or, obtain the vision information input by the input module;

[0033] And / or, obtain vision information input from the electronic terminal through the communication module.

[0034] In one embodiment, the controller includes an AI analysis unit, and the specific steps for acquiring vision information obtained by the sensor from the user's eyes or prescription lenses are as follows:

[0035] The system acquires detection results from multiple sensors and analyzes these results using an AI analysis unit to generate vision information. The vision information includes the user's interpupillary distance and eye state. The sensors include at least one of a wavefront sensor, an optical coherence tomography sensor, an automatic refractive measurement sensor, an eye-tracking sensor, a corneal reflection sensor, and an adaptive optics sensor.

[0036] In one embodiment, the step of controlling the operation of the electric drive device based on the vision information specifically includes:

[0037] The target position of the movable component is obtained based on the visual information; and

[0038] The target adjustment displacement of the movable part is obtained based on the target object distance, and the electric drive device is controlled to operate based on the target adjustment displacement.

[0039] The present invention also proposes a computer-readable storage medium storing a focus position adjustment program, which, when executed by a processor, implements the steps of the aforementioned focus position adjustment method.

[0040] In this invention, the prescription lens is configured according to the user's vision. Ambient light enters from the first surface and exits from the second surface, forming a clear image on the user's retina, allowing the user to see a clear environmental picture. Light emitted from the display module is reflected by the second surface and enters the eye. By moving at least one of the light source and the imaging lens, the distance between them is adjusted, thereby adjusting the object distance and adjusting the focal position of the virtual image corresponding to the display module. This focal position is then positioned on the retina, allowing the eye to see a clear display. Thus, this invention can correct the blurred environmental picture caused by the user's vision problems through the prescription lens, and can also correct the blurred virtual image caused by the user's vision problems by adjusting the position of the moving parts, providing a clear and comfortable virtual reality experience. This allows the virtual display and the real environment to exhibit a clear visual effect in the same visual space. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of a structure of an embodiment of the head-mounted display device provided by the present invention;

[0043] Figure 2 A schematic flowchart of the focus position adjustment method provided by the present invention;

[0044] Figure 3 This is another schematic diagram of the focus position adjustment method provided by the present invention.

[0045] Explanation of icon numbers:

[0046] 100. Prescription lens; 110. First surface; 120. Second surface;

[0047] 200, Display module; 210, Light source; 220, Imaging lens; 221, Lens; 230, Reflector.

[0048] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0049] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0050] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0051] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0052] This invention proposes a head-mounted display device.

[0053] Please see Figure 1 In one embodiment of the present invention, the head-mounted display device includes:

[0054] Casing (not shown);

[0055] Prescription lens 100, mounted in the housing, the prescription lens 100 having opposing first surface 110 and second surface 120, wherein ambient light received on the first surface 110 can be emitted through the second surface 120; and

[0056] Display module 200 is mounted on the housing and emits light toward the second surface 120. The second surface 120 can reflect the light from the display module 200. The display module 200 includes a light source 210 and an imaging lens 220 distributed sequentially in the direction from upstream to downstream of the light path. At least one of the light source 210 and the imaging lens 220 is configured as a movable member relative to the housing, so that the focal position of the virtual image corresponding to the display module 200 is adjustable.

[0057] It should be noted that the second surface 120 of the prescription lens 100 has a related optical design, such as, but not limited to, a semi-transparent and semi-reflective film, so that ambient light can be transmitted through the second surface 120 and the emitted light from the display module 200 can be reflected by the second surface 120.

[0058] At least one of the light source 210 and the imaging lens 220 is configured as a movable component, that is, at least one of the light source 210 and the imaging lens 220 can be moved, making the distance between the light source 210 and the imaging lens 220 adjustable. This can be either the light source 210 or the imaging lens 220 being movable, or both the light source 210 and the imaging lens 220 being movable.

[0059] In this invention, the prescription lens 100 is configured to address the user's vision. Ambient light enters from the first surface 110 and exits from the second surface 120, forming a clear image on the user's retina, allowing the user to see a clear environmental picture. Light emitted from the display module 200 is reflected by the second surface 120 and enters the eye. By moving at least one of the light source 210 and the imaging lens 220, the distance between them is adjusted, thereby adjusting the object distance and adjusting the focal position of the virtual image corresponding to the display module 200. This ensures the focal position is on the retina, allowing the eye to see a clear display. Thus, this invention can correct the blurred environmental image caused by the user's vision problems through the prescription lens 100, and can also correct the blurred virtual image caused by the user's vision problems by adjusting the position of the moving parts, providing a clear and comfortable virtual reality experience. This allows the virtual display and the real environment to exhibit a clear visual effect in the same visual space.

[0060] Without loss of generality, the head-mounted display device of the present invention is configured as AR (Augmented Reality) glasses, the housing of which includes a frame and temples, a prescription lens 100 is mounted on the frame, and the frame generally has a nose pad. The display module 200 can be mounted on the nose pad or the temples. Of course, in other embodiments, the head-mounted display device may also be an MR (Mixed Reality) display device or other devices.

[0061] In one embodiment, the imaging lens 220 is configured as a lens 221 with optical power, and the lens 221, as the movable element, is movably disposed in the direction extending along its optical axis. Thus, by moving the lens 221 along its optical axis, the distance between the light source 210 and the lens 221 can be adjusted. With a fixed focal length of the lens 221, changing the object distance alters the focal position of the virtual image, ensuring that the focal position of the virtual image is on the retina of the human eye, thereby guaranteeing a clear image. Of course, in other embodiments, the imaging lens 220 can also be a holographic element, a diffractive optical element, etc.

[0062] In one embodiment, the light source 210 is configured as a point light source 210 or a point-like light source 210, and the lens 221 is used to diverge the emitted light from the light source 210. That is, the light emitted by the light source 210 will be uniformly diffused in all directions, and the light intensity in each direction is similar, which is beneficial to ensuring the imaging quality of the displayed image. The light source 210 can be miniaturized, and the lens 221 diverges the emitted light from the light source 210 to magnify the image of the light source 210 and form a virtual image. One or more lenses 221 can be provided. When multiple lenses 221 are provided, they may include lenses 221 that focus the light, as long as the combination of multiple lenses 221 can diverge the light. Without loss of generality, the lens 221 is configured as a freeform surface lens 221, and its central axis of symmetry is equivalent to the optical axis. Of course, in other embodiments, the light source 210 can also be a surface light source 210, and the lens 221 can also be a concave lens 221.

[0063] In one embodiment, a reflector 230 is further provided downstream of the optical path of the lens 221. The reflected light from the reflector 230 is projected onto the second surface 120. The reflector 230 is movably disposed. That is, in the optical path of the display module 200, the reflector 230 is located between the lens 221 and the prescription lens 100. The reflector 230 reflects the light from the lens 221, and the reflected light is projected onto the second surface 120 of the prescription lens 100. In this way, the propagation direction of the optical path can be changed by the reflector 230, which facilitates the spatial layout of the optical elements of the display module 200. Furthermore, since the reflector 230 is movably disposed, the reflected light from the reflector 230 can be moved or rotated to ensure that it is projected onto the second surface 120 at a suitable position, avoiding distortion of the image and ensuring image quality. Of course, in other embodiments, the light emitted from the lens 221 can also be directly projected onto the prescription lens 100.

[0064] In one embodiment, the head-mounted display device further includes a drive component, which is configured as at least one of an electric drive device and a manual drive unit. The electric drive device is driven and connected to the movable component, and the manual drive unit is exposed outside the housing and is driveably connected to the movable component. It is understood that the electric drive device can drive the movable component to move via a motor, and the manual drive unit is for user operation and can be in the form of a knob or a sliding protrusion. The electric method is more labor-saving and easier to operate, while the manual drive unit has lower design costs and is less prone to failure. Both can be configured separately or in combination on the head-mounted display device.

[0065] Specifically, the driving component is connected to the movable component via a rack and pinion structure. Through the rack and pinion structure, the rotation of the output shaft of the electric drive device and the rotation of the manual drive unit (knob type) can be converted into movement of the movable component, thereby stably driving the movable component to move. Of course, in other embodiments, this motion conversion can also be achieved using a lead screw and slider structure.

[0066] Furthermore, a driving element can be configured to drive one moving element, or it can drive two moving elements simultaneously. Without loss of generality, an electric drive device can simultaneously drive the light source 210 and the lens 221. When the electric drive device operates, it can cause the light source 210 and the lens 221 to move towards each other or away from each other, thereby changing the distance between the light source 210 and the lens 221.

[0067] The electric drive unit can be automatically controlled by a controller or driven by the user through buttons or gestures.

[0068] In one embodiment, the head-mounted display device further includes a controller configured to control the operation of the electric drive device after acquiring visual information, so that the focal position of the virtual image corresponding to the display module 200 is adapted to the visual information. Thus, the controller can control the electric drive device to automatically adjust the object distance to a suitable position, thereby making it easier to adjust the focal position of the virtual image and ensuring clear imaging of the displayed image on the retina of the human eye.

[0069] In one embodiment, the head-mounted display device further includes at least one of a sensor, an input module, and a communication module electrically connected to the controller; the sensor is used to detect the user's eye or prescription lens 100 to obtain the vision information; the input module is used for the user to input the vision information; and the communication module is configured to be communicatively connected to an electronic terminal to receive the vision information input by the user from the electronic terminal.

[0070] The sensors equipped in the head-mounted display device can obtain the user's vision information by detecting the state of the user's eyes, so that the focal position of the virtual image matches the user's vision. They can also obtain the user's vision information by detecting the power of the prescription lens 100, so that the clarity of the virtual image corresponding to the display module 200 is consistent with that of the environmental image, so that the user has consistent visual clarity for both the environmental image and the displayed image.

[0071] The input module of the head-mounted display device allows users to input their vision information, including eye distance, visual acuity, and other refraction results. The input module can be a button, a touch screen, or a gesture recognition device.

[0072] The communication module equipped with the head-mounted display device enables communication between the head-mounted display device and the electronic terminal. The communication module can be a wireless communication module, which communicates with the electronic terminal through at least one wireless communication means such as Bluetooth, WIFI, infrared radio frequency, etc. The electronic terminal can be a mobile phone, computer, or control device that comes with the head-mounted display device, such as, but not limited to, a gamepad. Users can input their vision information on the relevant interface of the electronic terminal, and the electronic terminal can transmit the vision information to the head-mounted display device.

[0073] The head-mounted display device can acquire visual information through at least one of the above methods. The controller generates corresponding adjustment parameters based on the visual information to control the operation of the electric drive device, thereby adjusting the moving parts to a suitable position. Once adjusted, the display image can be clearly imaged on the retina of the human eye.

[0074] Specifically, the sensor is configured as at least one of a wavefront sensor, an optical coherence tomography sensor, an automatic refractive measurement sensor, an eye-tracking sensor, a corneal reflection sensor, and an adaptive optics sensor.

[0075] A wavefront sensor can measure the wavefront distortion caused by light passing through the eyeball using wavefront aberration detection technology, and then calculate the user's refractive status (including myopia, hyperopia, and astigmatism).

[0076] Optical coherence tomography (OCT) sensors can scan eye tissues (such as the cornea and lens) using near-infrared light, analyze the length and shape of the optical path, and indirectly calculate myopia.

[0077] An autorefractor sensor can project infrared light or laser light onto the retina and analyze the aberrations of the reflected light to determine the refractive state.

[0078] Eye-tracking sensors can record the position of a user's retina projection at different focal lengths and, combined with dynamic optical adjustment algorithms, calculate the degree of myopia.

[0079] A corneal reflection sensor can analyze corneal curvature using reflected light from the cornea to deduce the optical properties and refractive state of the eye.

[0080] An adaptive optics sensor uses adaptive optics elements to adjust the optical path in real time, measuring and compensating for optical defects in the eye to calculate refractive power. This approach utilizes a wavefront sensor as part of its system, enabling real-time dynamic parameter correction.

[0081] The head-mounted display device obtains the user's vision information by detecting the user's eyes using at least one of the aforementioned sensors. The head-mounted display device can be configured with only one sensor to acquire vision information, or it can be configured with multiple sensors. When multiple sensors are configured, the types of sensors can be the same or different. The controller obtains more accurate vision information by comprehensively analyzing the data from multiple sensors. Without loss of generality, the controller includes an AI analysis unit, which analyzes the data from multiple sensors to obtain the user's eye characteristics and deduce the degree of myopia, thus obtaining more accurate results.

[0082] This invention also proposes a focus position adjustment method, applied to head-mounted display devices; please refer to [reference needed]. Figure 1 The head-mounted display device includes:

[0083] Casing (not shown);

[0084] A prescription lens 100 is mounted on the housing. The prescription lens 100 has a first surface 110 and a second surface 120 opposite to each other. Ambient light received by the first surface 110 can be emitted through the second surface 120.

[0085] A display module 200 is mounted on the housing and emits light toward the second surface 120, which reflects the light from the display module 200. The display module 200 includes a light source 210 and an imaging lens 220 sequentially distributed in a direction from upstream to downstream of the light path. At least one of the light source 210 and the imaging lens 220 is configured as a movable member relative to the housing.

[0086] A controller and an electric drive unit, wherein the electric drive unit is driven and connected to the movable part, and the controller is electrically connected to the electric drive unit;

[0087] Please refer to Figure 2 The focus position adjustment method includes:

[0088] S100, Obtaining vision information; and

[0089] S200. Control the operation of the electric drive device according to the vision information to drive the moving part to move, so that the focal position of the virtual image corresponding to the display module is adapted to the vision information.

[0090] It should be noted that the second surface 120 of the prescription lens 100 has a related optical design, such as, but not limited to, a semi-transparent and semi-reflective film, so that ambient light can be transmitted through the second surface 120 and the emitted light from the display module 200 can be reflected by the second surface 120.

[0091] At least one of the light source 210 and the imaging lens 220 is configured as a movable component, that is, at least one of the light source 210 and the imaging lens 220 can be moved, making the distance between the light source 210 and the imaging lens 220 adjustable. This can be either the light source 210 or the imaging lens 220 being movable, or both the light source 210 and the imaging lens 220 being movable.

[0092] In the technical solution of this invention, the prescription lens 100 is configured according to the user's vision. Ambient light enters from the first surface 110 and exits from the second surface 120, forming a clear image on the user's retina, thus enabling the user to see a clear environmental picture. The light emitted by the display module 200 enters the human eye after being reflected by the second surface 120. By driving at least one of the light source 210 and the imaging lens 220 to move, the distance (i.e., object distance) between the light source 210 and the imaging lens 220 is adjusted, thereby adjusting the focal position of the virtual image corresponding to the display module 200, so that the focal position of the virtual image can match the user's vision, so that the focal position can be located on the retina of the human eye, and the human eye can see a clear display picture. Thus, the present invention can correct the problem of blurred environmental images caused by the user's vision problems by using prescription lenses 100, and can also correct the problem of blurred virtual images caused by the user's vision problems by adjusting the position of the moving parts, providing a clear and comfortable virtual reality experience, thereby enabling the virtual display screen and the real environment screen to exhibit a clear visual effect in the same visual space.

[0093] Specifically, the electric drive unit is connected to the moving part via a rack and pinion structure. Through the rack and pinion structure, the rotation of the output shaft of the electric drive unit can be converted into movement of the moving part, thereby stably driving the moving part. Of course, in other embodiments, this motion conversion can also be achieved using a lead screw and slider structure.

[0094] The controller is electrically connected to the drive unit. After acquiring the user's visual information, the controller can control the drive unit to move, thereby moving the moving parts to the appropriate position. In this way, the object distance can be automatically adjusted, making it easier to adjust the focal position of the virtual image, so that the displayed image is clearly imaged on the retina of the human eye.

[0095] In this configuration, an electric drive device can be configured to drive one movable component, or it can be a single drive device that simultaneously drives two movable components. Without loss of generality, an electric drive device can simultaneously drive the light source 210 and the lens 221. When this electric drive device operates, it can cause the light source 210 and the lens 221 to move towards each other or away from each other, thereby changing the distance between the light source 210 and the lens 221.

[0096] Without loss of generality, the head-mounted display device of the present invention is configured as AR (Augmented Reality) glasses, the housing of which includes a frame and temples, a prescription lens 100 is mounted on the frame, and the frame generally has a nose pad. The display module 200 can be mounted on the nose pad or the temples. Of course, in other embodiments, the head-mounted display device may also be an MR (Mixed Reality) display device or other devices.

[0097] Without loss of generality, the imaging lens 220 is configured as a lens 221 with optical power, and the lens 221, as the movable element, is movably disposed along the extension direction of its optical axis. Thus, by moving the lens 221 along its optical axis, the distance between the light source 210 and the lens 221 can be adjusted. With a fixed focal length of the lens 221, changing the object distance alters the focal position of the virtual image, ensuring that the focal position of the virtual image is on the retina of the human eye, thereby guaranteeing a clear image. Of course, in other embodiments, the imaging lens 220 can also be a holographic element, a diffractive optical element, etc.

[0098] Without loss of generality, the light source 210 is configured as a point light source 210 or a point-like light source 210, and the lens 221 is used to diverge the emitted light from the light source 210. That is, the light emitted by the light source 210 will be uniformly diffused in all directions, and the light intensity in each direction is similar, which is beneficial to ensuring the imaging quality of the displayed image. The light source 210 can be miniaturized, and the lens 221 diverges the emitted light from the light source 210 to magnify the image of the light source 210 and form a virtual image. One or more lenses 221 can be provided. When multiple lenses 221 are provided, they may include lenses 221 that focus the light, as long as the combination of multiple lenses 221 can diverge the light. Without loss of generality, the lens 221 is configured as a freeform surface lens 221, and its central axis of symmetry is equivalent to the optical axis. Of course, in other embodiments, the light source 210 can also be a surface light source 210, and the lens 221 can also be a concave lens 221.

[0099] In one embodiment, a reflector 230 is further provided downstream of the optical path of the lens 221. The reflected light from the reflector 230 is projected onto the second surface 120. The reflector 230 is movably disposed. That is, in the optical path of the display module 200, the reflector 230 is located between the lens 221 and the prescription lens 100. The reflector 230 reflects the light from the lens 221, and the reflected light is projected onto the second surface 120 of the prescription lens 100. In this way, the propagation direction of the optical path can be changed by the reflector 230, which facilitates the spatial layout of the optical elements of the display module 200. Furthermore, since the reflector 230 is movably disposed, the reflected light from the reflector 230 can be moved or rotated to ensure that it is projected onto the second surface 120 at a suitable position, avoiding distortion of the image and ensuring image quality. Of course, in other embodiments, the light emitted from the lens 221 can also be directly projected onto the prescription lens 100.

[0100] In one embodiment, the head-mounted display device further includes at least one of a sensor, an input module, and a communication module electrically connected to the controller, and step S100 specifically comprises:

[0101] S110. Acquire visual information obtained by the sensor from the user's eye or prescription lenses; and / or

[0102] S120. Obtain the vision information input from the input module; and / or

[0103] S130. Obtain vision information input from the electronic terminal through the communication module.

[0104] In this invention, the user's visual information can be obtained through at least one of steps S110, S120 and S130. That is, a single method of obtaining visual information can be set, or multiple methods of obtaining visual information can be set. After obtaining visual information in one of the methods, the adjustment of the focal position of the virtual image begins.

[0105] The sensors equipped in the head-mounted display device can obtain the user's vision information by detecting the state of the user's eyes, so that the focal position of the virtual image matches the user's vision. They can also obtain the user's vision information by detecting the power of the prescription lens 100, so that the clarity of the virtual image corresponding to the display module 200 is consistent with that of the environmental image, so that the user has consistent visual clarity for both the environmental image and the displayed image.

[0106] The input module of the head-mounted display device allows users to input their vision information, including eye distance, visual acuity, and other refraction results. The input module can be a button, a touch screen, or a gesture recognition device.

[0107] The communication module equipped with the head-mounted display device enables communication between the head-mounted display device and the electronic terminal. The communication module can be a wireless communication module, which communicates with the electronic terminal through at least one wireless communication means such as Bluetooth, WIFI, infrared radio frequency, etc. The electronic terminal can be a mobile phone, computer, or control device that comes with the head-mounted display device, such as, but not limited to, a gamepad. Users can input their vision information on the relevant interface of the electronic terminal, and the electronic terminal can transmit the vision information to the head-mounted display device.

[0108] The head-mounted display device can acquire visual information through at least one of the above methods. The controller generates corresponding adjustment parameters based on the visual information to control the operation of the electric drive device, thereby adjusting the moving parts to a suitable position. Once adjusted, the display image can be clearly imaged on the retina of the human eye.

[0109] Specifically, after the user inputs their vision information, a sensor can be used to detect the user's eyes or prescription lenses 100 to verify the input vision information. If the two do not match, the user is prompted to confirm. Alternatively, based on the user's input vision information, the focal position of the virtual image is pre-adjusted, and then finely adjusted using sensor detection. This ensures that the user's initial visual experience of the displayed image is not too poor, avoiding a significant difference in clarity between the displayed image and the surrounding environment, which could cause dizziness or nausea.

[0110] In one embodiment, the controller includes an AI analysis unit, and the specific steps for acquiring vision information detected by the sensor on the user's eye or prescription lens 100 are as follows:

[0111] The system acquires detection results from multiple sensors and analyzes these results using an AI analysis unit to generate vision information. The vision information includes the user's interpupillary distance and eye state. The sensors include at least one of a wavefront sensor, an optical coherence tomography sensor, an automatic refractive measurement sensor, an eye-tracking sensor, a corneal reflection sensor, and an adaptive optics sensor.

[0112] A wavefront sensor can measure the wavefront distortion caused by light passing through the eyeball using wavefront aberration detection technology, and then calculate the user's refractive status (including myopia, hyperopia, and astigmatism).

[0113] Optical coherence tomography (OCT) sensors can scan eye tissues (such as the cornea and lens) using near-infrared light, analyze the length and shape of the optical path, and indirectly calculate myopia.

[0114] An autorefractor sensor can project infrared light or laser light onto the retina and analyze the aberrations of the reflected light to determine the refractive state.

[0115] Eye-tracking sensors can record the position of a user's retina projection at different focal lengths and, combined with dynamic optical adjustment algorithms, calculate the degree of myopia.

[0116] A corneal reflection sensor can analyze corneal curvature using reflected light from the cornea to deduce the optical properties and refractive state of the eye.

[0117] An adaptive optics sensor uses adaptive optics elements to adjust the optical path in real time, measuring and compensating for optical defects in the eye to calculate refractive power. This approach utilizes a wavefront sensor as part of its system, enabling real-time dynamic parameter correction.

[0118] The head-mounted display device obtains the user's vision information by detecting the user's eyes using at least one of the aforementioned sensors. The head-mounted display device can be configured with only one sensor to acquire vision information, or it can be configured with multiple sensors. When multiple sensors are configured, the types of sensors can be the same or different. The controller obtains more accurate vision information by comprehensively analyzing the data from multiple sensors. Without loss of generality, the controller includes an AI analysis unit. The controller analyzes the data from multiple sensors through the AI ​​analysis unit to obtain the user's interpupillary distance and eye state (e.g., but not limited to refractive error), and derives the degree of myopia, thus obtaining more accurate results.

[0119] In one implementation, please refer to Figure 3 The step S200, which involves controlling the operation of the electric drive device based on the vision information, specifically includes:

[0120] S210. Obtain the target position of the movable component based on the visual information; and

[0121] S220. Obtain the target adjustment displacement of the movable part according to the target object distance, and control the electric drive device to operate according to the target adjustment displacement.

[0122] Specifically, based on the user's visual acuity, the target position corresponding to the movable component is determined so that the focal position of the virtual image is on the retina of the human eye. Then, based on the target position of the movable component and the current object distance, the target adjustment displacement of the movable component is obtained, that is, the direction and distance that the movable component needs to move. The electric drive device is then controlled to rotate forward or backward, and the amount of rotation is controlled accordingly. Of course, in other embodiments, it is also possible to determine the target object distance corresponding to the display module 200 so that the focal position of the virtual image is on the retina of the human eye, and then obtain the target adjustment displacement of the movable component based on the target object distance and the current object distance.

[0123] The present invention also proposes a computer-readable storage medium storing a focus position adjustment program, which, when executed by a processor, implements the steps of the aforementioned focus position adjustment method. This computer-readable storage medium employs all the technical solutions of all the above embodiments of the focus position adjustment method, and therefore possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0124] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A head-mounted display device, characterized in that, include: case; A prescription lens is mounted on the housing. The prescription lens has a first surface and a second surface opposite to each other. Ambient light received on the first surface can be emitted through the second surface. as well as A display module is mounted on the housing and emits light toward the second surface, which can reflect the light from the display module. The display module includes a light source and an imaging lens distributed sequentially in the direction from upstream to downstream of the light path. At least one of the light source and the imaging lens is configured as a movable member relative to the housing, so that the focal position of the virtual image corresponding to the display module is adjustable.

2. The head-mounted display device as claimed in claim 1, characterized in that, The imaging lens is configured as a lens with optical power, and the lens, as the movable element, is movably disposed in the extension direction of its optical axis.

3. The head-mounted display device as described in claim 2, characterized in that, A reflector is also provided downstream of the optical path of the lens, and the reflected light from the reflector is projected onto the second surface. The reflector is movably disposed. And / or, the light source is configured as a point light source or a point light source-like light source, and the lens is used to diverge the emitted light rays from the light source; And / or, the lens is configured as a freeform lens.

4. The head-mounted display device as described in any one of claims 1 to 3, characterized in that, The head-mounted display device further includes a driving component, which is configured as at least one of an electric driving device and a manual driving unit. The electric driving device is driven and connected to the movable component, and the manual driving unit is exposed outside the housing and is driven and connected to the movable component.

5. The head-mounted display device as described in claim 4, characterized in that, The driving component is connected to the moving component via a gear and rack structure.

6. The head-mounted display device as claimed in claim 4, characterized in that, The head-mounted display device also includes a controller configured to control the operation of the electric drive device after acquiring visual information, so that the focal position of the virtual image corresponding to the display module is adapted to the visual information.

7. The head-mounted display device as claimed in claim 6, characterized in that, The head-mounted display device further includes at least one of a sensor, an input module, and a communication module electrically connected to the controller; The sensor is used to detect the user's eyes or prescription lenses to obtain the vision information; The input module is used to allow users to input the vision information; The communication module is configured to communicate with an electronic terminal to receive the vision information input by the user from the electronic terminal.

8. The head-mounted display device as claimed in claim 7, characterized in that, The sensor is configured to be at least one of a wavefront sensor, an optical coherence tomography sensor, an automatic refractive measurement sensor, an eye-tracking sensor, a corneal reflection sensor, and an adaptive optics sensor. And / or, the controller includes an AI analysis unit.

9. The head-mounted display device as claimed in claim 1, characterized in that, The head-mounted display device is configured as AR glasses, and the housing includes a frame and temples, with the display module mounted on at least one of the nose pad of the frame and the temples.

10. A focus position adjustment method, applied to a head-mounted display device, characterized in that, The head-mounted display device includes: case; A prescription lens is mounted on the housing. The prescription lens has a first surface and a second surface opposite to each other. Ambient light received on the first surface can be emitted through the second surface. A display module, mounted on the housing, emits light toward a second surface, the second surface being capable of reflecting the light from the display module. The display module includes a light source and an imaging lens sequentially distributed in a direction from upstream to downstream of the optical path. At least one of the light source and the imaging lens is configured as a movable member relative to the housing. A controller and an electric drive unit, wherein the electric drive unit is driven and connected to the movable part, and the controller is electrically connected to the electric drive unit; The focus position adjustment method includes: Obtaining vision information; and The electric drive device is controlled to operate based on the vision information, thereby driving the movable component to move, so that the focal position of the virtual image corresponding to the display module is adapted to the vision information.

11. The focus position adjustment method as described in claim 10, characterized in that, The head-mounted display device further includes at least one of a sensor, an input module, and a communication module electrically connected to the controller, and the step of acquiring vision information specifically includes: Acquire visual information from the sensor's detection of the user's eyes or prescription lenses; And / or, obtain the vision information input by the input module; And / or, obtain vision information input from the electronic terminal through the communication module.

12. The focal position adjustment method as described in claim 11, characterized in that, The controller includes an AI analysis unit, and the specific steps for acquiring vision information obtained by the sensor from the user's eyes or prescription lenses are as follows: The system acquires detection results from multiple sensors and analyzes these results using an AI analysis unit to generate vision information. The vision information includes the user's interpupillary distance and eye state. The sensors include at least one of a wavefront sensor, an optical coherence tomography sensor, an automatic refractive measurement sensor, an eye-tracking sensor, a corneal reflection sensor, and an adaptive optics sensor.

13. The focus position adjustment method as described in claim 10, characterized in that, The specific steps of controlling the operation of the electric drive device based on the vision information are as follows: The target position of the movable component is obtained based on the visual information; and The target adjustment displacement of the movable part is obtained based on the target object distance, and the electric drive device is controlled to operate based on the target adjustment displacement.

14. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a focus position adjustment program, which, when executed by a processor, implements the steps of the focus position adjustment method according to any one of claims 10 to 13.

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