CN103190883B - A head-mounted display device and image adjustment method - Google Patents

Abstract

Embodiments of the present invention provide a head-mounted display device and an image adjustment method. The device includes a vision detection module, an image adjustment module and a display module, wherein: the vision detection module is used to photograph the user's fundus imaging, and send an image adjustment command to the image adjustment module based on the captured fundus imaging state; In the process of dynamic adjustment, determine the optimal focus parameters of the user's fundus imaging; the image adjustment module is used to dynamically adjust the display properties of the display module according to the image adjustment command; the display module is used to receive image signals, and based on the best focus parameters The display properties at the time present the image signal to the user. The embodiment of the present invention can automatically identify the vision of the user, so that the user can clearly see the displayed image, which can improve convenience and ease of use, and users with different vision levels can use the embodiment of the present invention conveniently.

Description

A head-mounted display device and image adjustment method

technical field

The embodiments of the present invention relate to the technical field of information processing, and more specifically, to a head-mounted display device and an image adjustment method.

Background technique

In today's information age, various information devices have emerged as the times require: fixed telephones and mobile phones for voice transmission; servers and personal computers for information resource sharing and processing; various TV sets for video data display, etc. wait. These devices are produced to solve actual needs in specific fields. With the advent of the integration of electronic consumption, computer, and communication (3C), people are paying more and more attention to the research on the comprehensive utilization of information equipment in various fields, so as to make full use of existing resources and equipment to serve people. better service.

At present, head-mounted display devices are attracting more and more attention. However, when using a head-mounted display device, it is inevitable to face a problem, that is, people's myopia and hyperopia. The current head-mounted glasses display solution to the user's myopia problem mainly includes placing a lens holder in front of the glasses product, so that the user can place a vision correction lens suitable for his eyes, thereby achieving the purpose of vision correction. In addition, there is a mechanical device in the prior art that allows the user to manually adjust the relative position of a pair of wave-shaped lenses through a knob, so that the vision correction degree of the lenses can vary within a certain range, so that the user can manually adjust to a suitable degree.

However, various head-mounted display devices in the prior art can only solve the problem of vision correction within a certain range (such as 0~-0.5) through mechanical devices, and also need to rely on the user to manually adjust the operation, which is not convenient to use.

Contents of the invention

The embodiment of the present invention proposes a head-mounted display device, which can automatically identify a user's vision condition, so that the user can clearly see the displayed image of the head-mounted display.

The embodiment of the present invention also proposes an image adjustment method applied to a head-mounted display device, which can automatically identify the user's vision, so that the user can clearly see the displayed image of the head-mounted display.

The technical scheme of the embodiment of the present invention comprises:

A head-mounted display device, including a vision detection module, an image adjustment module and a display module, wherein:

The visual acuity detection module is used to capture the fundus imaging of the user, and send an image adjustment command to the image adjustment module based on the captured fundus imaging state; and determine the best focus parameters of the user's fundus imaging during the dynamic adjustment process of the display properties of the display module;

An image adjustment module, configured to dynamically adjust the display properties of the display module according to the image adjustment command;

A display module, configured to receive an image signal, and present the image signal to the user based on the display attribute at the best focus parameter.

The vision detection module includes a miniature fundus camera unit and an image microprocessing unit, wherein:

A miniature fundus camera unit, used to take images of the user's fundus;

The image micro-processing unit is used to analyze whether the user's fundus imaging is clear, and if not, send an image adjustment command to the image adjustment module; and determine the user's fundus imaging by means of automatic focusing during the dynamic adjustment process of the display properties of the display module best focus parameters.

The display module includes a variable lens;

An image adjustment module, configured to adjust the curvature of the variable lens according to the image adjustment command, and/or adjust the number of variable lenses in the display module.

It further includes an iris identification module; the iris identification module includes a miniature imaging unit and an operation processing unit;

A miniature imaging unit for photographing user's iris feature information;

The operation processing unit is used to save the iris features of the user, and perform matching calculation on the iris feature information captured by the micro-imaging unit and the saved iris features of the user, so as to identify the identity of the user.

The display module is further used to send the vision detection image signal to the vision detection module;

The vision detection module is used to capture the imaging of the vision detection image signal on the fundus of the user, and send an image adjustment command to the image adjustment module based on the imaging state of the vision detection image signal on the fundus of the user.

The image micro-processing unit is used to determine the optimal focus parameter of the user's fundus imaging according to the pixel grayscale variation relationship of the user's fundus imaging during the dynamic adjustment process of the display properties of the display module, or to determine the optimal focus parameters of the user's fundus imaging according to the evaluation of the display properties of the display module The image data power spectrum of the user's fundus imaging is dynamically adjusted to determine the best focusing parameters of the user's fundus imaging.

The arithmetic processing unit is further used for associating and storing the display attribute of the display module when the optimal focus parameter is captured with the iris characteristic information of the user;

The iris identification module is further configured to send the display attribute of the display module corresponding to the user's best focus parameter to the image adjustment module after identifying the user's identity.

An image adjustment method applied to a head-mounted display device, the method comprising:

Taking the fundus imaging of the user, dynamically adjusting the display properties of the display module based on the captured fundus imaging state, and determining the best focus parameters of the user's fundus imaging during the dynamic adjustment process of the display properties of the display module;

Receive image signal;

The image signal is presented based on the display properties of the display module when the optimal focus parameter is used.

The dynamic adjustment of the display properties of the display module based on the photographed fundus imaging state, and determining the best focus parameters of the user's fundus imaging during the dynamic adjustment process of the display properties of the display module includes:

Analyze whether the user's fundus imaging is clear, and if not, dynamically adjust the display properties of the display module; and determine the best focus parameters of the user's fundus imaging by using an automatic focusing method during the adjustment process of the display properties of the display module.

The method further includes:

Capture the user's iris feature information;

Matching the captured iris feature information with the saved user iris feature information to identify the user's identity, and associating the display attributes of the display module when the optimal focus parameter is captured with the captured user iris feature information save.

The determination of the optimal focus parameters of the user's fundus imaging during the dynamic adjustment of the display properties of the display module includes:

Determine the optimal focus parameter of the user's fundus imaging according to the grayscale variation relationship between the pixels of the user's fundus imaging during the dynamic adjustment process of the display properties of the display module, or determine the user's fundus imaging during the dynamic adjustment process of the display properties of the display module according to the evaluation The power spectrum of the imaged image data is used to determine the best focusing parameters for the user's fundus imaging.

The display module sends the vision detection image signal in advance;

The photographing of the user's fundus imaging, and dynamically adjusting the display properties of the display module based on the photographed fundus imaging state include:

The imaging of the vision detection image signal on the user's fundus is captured, and the display properties of the display module are dynamically adjusted based on the imaging state of the vision detection image signal on the user's fundus.

It can be seen from the above technical solutions that in the embodiment of the present invention, the head-mounted display device includes a vision detection module, an image adjustment module, and a display module, wherein: the vision detection module is used to capture the user's fundus imaging, based on the captured The fundus imaging state sends an image adjustment command to the image adjustment module; and determines the best focus parameter of the user's fundus imaging during the dynamic adjustment process of the display properties of the display module; the image adjustment module is used to adjust the display module according to the image adjustment command The display property is dynamically adjusted; the display module is used to receive the image signal, and present the image signal to the user based on the display property of the optimal focus parameter. It can be seen that after applying the embodiment of the present invention, the user's vision condition can be automatically identified, so that the user can clearly see the display image of the head-mounted display, and an adaptive display for the user's vision condition is realized.

Moreover, the convenience and ease of use of the head-mounted display device can be significantly improved, so that users with different vision levels can conveniently use the embodiments of the present invention.

In addition, the embodiment of the present invention stores the user's system parameter setting information by means of iris matching and recognition, and performs system initialization according to the stored system parameter setting information, and when the user initially uses it, the display situation can be corrected according to the user's vision. The iris is matched to store system setting information, so that there is no need to correct the user's vision in subsequent use.

Description of drawings

FIG. 1 is a structural diagram of a head-mounted display device according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the operation of a head-mounted display device according to an embodiment of the present invention;

FIG. 3 is a flowchart of an image adjustment method applied to a head-mounted display device according to an embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

In an embodiment of the present invention, a solution for a head-mounted display that adapts to a user's vision is proposed. The solution will use fundus retinal photography technology and automatic focus technology adjustment technology to realize a head-mounted glasses product that adapts to the user's vision.

The present invention proposes a novel technical implementation scheme, which enables the user's head-mounted display to automatically recognize the user's vision condition, so that the user can clearly see the displayed image of the head-mounted display.

FIG. 1 is a structural diagram of a head-mounted display device according to an embodiment of the present invention.

As shown in Figure 1, the device includes a vision detection module 101, an image adjustment module 102 and a display module 103, wherein:

The vision detection module 101 is used to capture the fundus imaging of the user, and send an image adjustment command to the image adjustment module based on the captured fundus imaging state; and determine the best focus parameter of the user's fundus imaging during the dynamic adjustment process of the display properties of the display module ;

An image adjustment module 102, configured to dynamically adjust the display properties of the display module according to the image adjustment command;

The display module 103 is configured to receive an image signal, and present the image signal to the user based on the display property of the optimal focus parameter.

The visual acuity detection module 101 detects the user's visual acuity state by photographing the fundus imaging of the user, and sends an image adjustment command to the image adjustment module 102 based on the photographed fundus imaging state.

The image adjustment module 102 adjusts the display image provided by the display module 103 by dynamically adjusting the display attributes of the display module 103 by receiving the image adjustment command provided by the user vision detection module 101, and the display module 103 uses the adjusted display image Displayed to the user, so that the user can clearly see the displayed content.

Specifically, the vision detection module 101 may include a miniature fundus camera unit and an image micro-processing unit.

A miniature fundus camera unit, used to take images of the user's fundus;

The image micro-processing unit is used to analyze whether the user's fundus imaging is clear, and if not, send an image adjustment command to the image adjustment module 102; Optimal focus parameters for fundus imaging.

At present, the realization of passive auto-focus technology in the camera field is to evaluate the clarity of the image through software analysis methods to control the focus adjustment operation of the camera. A typical autofocus sensor is a Charge-Coupled Device (CCD), which provides data for calculating the contrast of the actual picture elements. A CCD is usually a single pixel strip consisting of 100 or 200 pixels. As soon as light from the scene hits this strip of pixels, the microprocessor looks at the value of each pixel and looks at the difference in intensity between adjacent pixels. If the scene is out of focus, adjacent pixels have very similar intensities. The microprocessor moves the lens and looks again at the CCD's pixels to see if the difference in intensity between adjacent pixels is increasing or decreasing. The microprocessor then searches for the focus parameter with the greatest intensity difference between adjacent pixels, ie the best focus parameter.

Specifically, the display module 103 first presents the vision detection image signal to the user, and then the micro fundus camera unit in the vision detection module 101 captures the vision detection image signal and images it on the user's fundus.

The image micro-processing unit in the eyesight detection module 101 analyzes whether the image is clear in real time, and sends an image adjustment command to the image adjustment module 102 if it is unclear. The drive unit in the image adjustment module 102 adjusts the display properties of the display module 103 according to the image adjustment command, so as to realize the dynamic adjustment of the display image definition of the display module 103 .

During the process of dynamic adjustment of the display properties of the display module 103, the sharpness of the eyesight detection image signal on the user's fundus is also dynamically adjusted. When the image micro-processing unit uses the principle of auto-focus to search for the best focus parameters (that is, when the visual acuity detection image signal has the highest imaging definition on the user's fundus), the image adjustment module 102 will also display the display properties of the display module 103 Adjust to the best state suitable for the user to watch, thus realizing the head-mounted display that adapts to the user's vision.

The display module 103 is capable of receiving and displaying image display signals. The display module 103 may include a left-eye display unit and a right-eye display unit, respectively corresponding to the left and right eyes of the user. The display module 103 divides and processes the received image signal into a left-eye display signal and a right-eye display signal according to an agreed format, and respectively displays the left-eye display signal and the right-eye display signal through the left-eye display unit and the right-eye display unit respectively. For the user's left and right eyes.

In the embodiment of the present invention, by controlling the slight difference between the display signal for the left eye and the display signal for the right eye, the user can have the effect of viewing the three-dimensional stereoscopic interface, thereby realizing three-dimensional stereoscopic display.

The miniature fundus photography unit in the vision detection module 101 can be similar to a computer optometry system, by sending a beam of specific light signals to the retina of the human eye, passing through the cornea, lens, aqueous humor and other eye organs, and finally projecting to the retina of the eye, and then Reflected back to the corresponding optical system of the instrument, it is received by the CCD and converts the optical signal into an electrical signal. The vision detection module 101 can use various optometry methods to analyze whether the user's fundus imaging is clear. Optometry is to check the convergence of light after it enters the eyeball. It takes the emmetropic eye state as the standard to measure the degree of vergence difference between the tested eye and the emmetropic eye.

The image micro-processing unit in the vision detection module 101 analyzes the fundus image received on the CCD. The specific analysis method is similar to the autofocus principle in the field of photography. It evaluates whether the received fundus image is clear through software algorithms. The adjustment unit 102 drives the change of the optical structure of the display module 103 to perform feedback adjustment. A clear image has better image contrast than an image with a certain amount of blur. The algorithm can use the relationship between grayscale changes between pixels to analyze whether the image is in good focus. The power spectrum of the image data can also be evaluated. When an image presents a clear structure and edge, the top of the autocorrelation curve is narrow and high. If the image is blurred, the top of the autocorrelation curve is wide and low, so you can find the image autocorrelation curve The sharpest state is regarded as the best optical structure state of the system.

For example: when the fundus image received by the vision detection module 101 is evaluated as blurred, it can drive the display optical path structure to change slightly, then evaluate the fundus image, and compare the blurring degree of the two images before and after. If the degree of blur increases, drive in the opposite direction to display the change of the optical path structure until the optimal optical path structure is found, and record the relevant parameters of the optimal optical path structure.

The display module 103 preferably includes a variable lens;

The image adjustment module 102 is configured to adjust the curvature of the variable lens according to the image adjustment command, and/or adjust the number of variable lenses in the display module 103 .

Preferably, the device may further include an iris identification module.

The iris identification module includes a miniature imaging unit and an operation processing unit;

A miniature imaging unit for photographing user's iris feature information;

The operation processing unit is used to save the iris features of the user, and perform matching calculation on the iris feature information captured by the micro-imaging unit and the saved iris features of the user, so as to identify the identity of the user.

Iris recognition technology is a human biometric technology. The appearance of the human eye consists of three parts: sclera, iris, and pupil. The sclera is the white part of the eyeball, accounting for about 30% of the total area; the center of the eye is the pupil, accounting for about 5%; the iris is located between the sclera and the pupil, and contains the most abundant texture information, accounting for 65%. In appearance, it is composed of many glandular fossa, folds, pigmented spots, etc. It is one of the most unique structures in the human body. The formation of the iris is determined by genetics, and human gene expression determines the shape, physiology, color and general appearance of the iris. When a person develops to about eight months, the iris basically develops to a sufficient size and enters a relatively stable period. Except for rare abnormal conditions, major physical or mental trauma that may cause changes in the appearance of the iris, the shape of the iris can remain unchanged for decades. The iris, on the other hand, is externally visible but at the same time belongs to the internal tissue, located behind the cornea. Changing the appearance of the iris requires very delicate surgery and risks visual damage. The highly unique, stable and unchangeable characteristics of the iris are the material basis for the iris to be used for identification. Among all biometric technologies including fingerprints, iris recognition is the most convenient and accurate one for current applications.

Iris recognition technology is widely considered to be the most promising biometric authentication technology in the 21st century. Future applications in various fields such as security, national defense, and e-commerce will inevitably focus on iris recognition technology. This trend has gradually begun to appear in various applications around the world, and the market application prospect is very broad.

Foreign research institutions of iris recognition mainly include companies such as Iridian and Iriteck in the United States and Jiris in South Korea. Iridian company masters the core algorithm of iris recognition and is currently the world's largest provider of professional iris recognition technology and products. It cooperates with LG, Panasonic, OKI, NEC and other companies (such as BM-ET300, and other products), provide iris recognition core algorithms in an authorized manner, and support partners in producing iris recognition systems. Iridian's core technologies also include image processing protocols and data standards identification server Development tools and iris recognition cameras, etc.

Preferably, the arithmetic processing unit is further configured to associate and save the display attribute of the display module when the optimal focus parameter is captured with the iris characteristic information of the user;

The iris identification module is further configured to send the display attribute of the display module corresponding to the user's best focus parameter to the image adjustment module after identifying the user's identity.

FIG. 2 is a schematic diagram of the operation of a head-mounted display device according to an embodiment of the present invention.

As shown in Figure 2, the user puts on the head-mounted display device, turns on the power, and the iris identification module first starts to work, photographing the user's iris features and performing matching analysis to find out whether there is relevant setting information of the user.

Assuming that the user uses the head-mounted display device for the first time, the system will automatically create a new user parameter information, and start to guide the user to perform an adaptive vision display correction process. At this time, the user's vision detection module starts to work, and the micro-fundus camera unit starts to obtain fundus imaging information in real time and transmits it to the image micro-processing unit for analysis. The image micro-processing unit coordinates the drive module in the image adjustment module to perform image adjustment in real time. When the processing unit finds the best focus parameters (that is, the image is the clearest in the user's fundus) through the algorithm, the adjustment system stops, and records the state parameters of the system at this time and the iris feature information of the user as the setting parameters for this specific user to store. At this time, the user vision detection module and the image adjustment module stop working, and the display module starts to normally receive and display image signals.

When the user uses the head-mounted device next time, the iris identification module recognizes the user's iris information and calls out its exclusive system setting parameters, and initializes the system according to the parameters, and then starts to display clear information for the user. Image information, so that there is no need to correct the user's vision in subsequent use.

The head-mounted display device can work with a variety of image signal providing devices to realize browsing of video signals, and these devices can include but are not limited to: feature phones, smart phones, handheld computers, personal computers (PCs), tablet computers Or personal digital assistants (PDAs), cloud processors, and so on.

Although the specific examples of the image signal providing device are listed above in detail, those skilled in the art can realize that these lists are only for the purpose of illustration, and are not used to limit the protection scope of the embodiments of the present invention.

Based on the above detailed analysis, the embodiment of the present invention also proposes an image adjustment method applied to a head-mounted display device.

FIG. 3 is a flowchart of an image adjustment method applied to a head-mounted display device according to an embodiment of the present invention.

As shown in Figure 3, the method includes:

Step 301: Capture the user's fundus imaging, dynamically adjust the display properties of the display module based on the captured fundus imaging status, and determine the best focus parameters of the user's fundus imaging during the process of dynamically adjusting the display properties of the display module.

Here are the steps for the user's adaptive vision display correction. The user can receive the vision detection image signal from the display module, and then capture the imaging of the vision detection image signal on the user's fundus, and dynamically adjust the display properties of the display module based on the imaging state of the vision detection image signal on the user's fundus.

Here, it can be analyzed whether the fundus imaging of the user is clear, and if not, the display properties of the display module are dynamically adjusted. During the process of dynamic adjustment of the display properties of the display module, the sharpness of the eyesight detection image signal on the user's fundus is also dynamically adjusted. In the process of adjusting the display properties of the display module, the best focusing parameters of the user's fundus imaging can be determined by means of automatic focusing.

Specifically, the optimal focus parameter of the user's fundus imaging can be determined according to the relationship between gray scale changes between pixels of the user's fundus imaging during the dynamic adjustment process of the display properties of the display module, or dynamically adjusted according to the evaluation of the display properties of the display module. In the process, the image data power spectrum of the user's fundus imaging is used to determine the best focusing parameters of the user's fundus imaging (that is, the vision detection image signal has the highest resolution in the user's fundus imaging), and the display properties of the display module are adjusted to the appropriate In the best state of viewing by the user, a head-mounted display that adapts to the user's vision is realized.

Step 302: Receive an image signal.

Here, normal playback of an image signal (such as a video signal) to the user starts. The display module can receive image signals from various image signal sources.

Step 303: Present the image signal based on the display properties of the display module when the optimal focus parameter is used.

After the display module receives image signals from various image signal sources, it can render the image signals based on the display properties of the display module at optimal focus parameters.

The method further includes:

Capture the user's iris feature information;

Matching the captured iris feature information with the saved user iris feature information to identify the user's identity, and associating the display attributes of the display module when the optimal focus parameter is captured with the captured user iris feature information save.

In fact, the head-mounted display device proposed in the embodiments of the present invention can be implemented in various forms.

To sum up, in the embodiment of the present invention, the head-mounted display device includes a vision detection module, an image adjustment module and a display module, wherein: the vision detection module is used to capture the user's fundus imaging, based on the captured fundus imaging state Send an image adjustment command to the image adjustment module; and determine the best focus parameter of the user's fundus imaging during the dynamic adjustment process of the display attribute of the display module; the image adjustment module is used to perform the display attribute of the display module according to the image adjustment command Dynamic adjustment; a display module, configured to receive an image signal, and present the image signal to the user based on the display properties of the best focus parameters. It can be seen that after applying the embodiment of the present invention, the user's vision condition can be automatically identified, so that the user can clearly see the display image of the head-mounted display, and an adaptive display for the user's vision condition is realized.

Moreover, the convenience and ease of use of the head-mounted display device can be significantly improved, so that users with different vision levels can conveniently use the embodiments of the present invention.

In addition, the embodiment of the present invention stores the user's system parameter setting information by means of iris matching and recognition, and performs system initialization according to the stored system parameter setting information, and when the user initially uses it, the display situation can be corrected according to the user's vision. The iris is matched to store system setting information, so that there is no need to correct the user's vision in subsequent use.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (4)

1. A head-mounted display device, characterized in that it includes a vision detection module, an image adjustment module and a display module, wherein: The visual acuity detection module is used to capture the fundus imaging of the user, and send an image adjustment command to the image adjustment module based on the captured fundus imaging state; and determine the best focus parameters of the user's fundus imaging during the dynamic adjustment process of the display properties of the display module; An image adjustment module, configured to dynamically adjust the display properties of the display module according to the image adjustment command; a display module, configured to receive an image signal, and present the image signal to the user based on the display attribute at the best focus parameter; It further includes an iris identification module; the iris identification module includes a miniature imaging unit and an operation processing unit; A miniature imaging unit for photographing user's iris feature information; The computing processing unit is used to save the user's iris features, and perform matching calculation on the iris feature information captured by the micro-imaging unit and the saved user's iris features, so as to identify the user's identity; The arithmetic processing unit is further used for associating and saving the display attribute of the display module when the optimal focus parameter is captured with the iris characteristic information of the user; The vision detection module includes a miniature fundus camera unit and an image microprocessing unit, wherein: A miniature fundus camera unit, used to take images of the user's fundus; The image micro-processing unit is used to analyze whether the user's fundus imaging is clear, and if not, send an image adjustment command to the image adjustment module; and determine the user's fundus imaging by means of automatic focusing during the dynamic adjustment process of the display properties of the display module The best focus parameters of ; The display module includes a variable lens; An image adjustment module, configured to adjust the curvature of the variable lens according to the image adjustment command, and/or adjust the number of variable lenses in the display module; The image micro-processing unit is used to determine the optimal focus parameter of the user's fundus imaging according to the pixel grayscale variation relationship of the user's fundus imaging during the dynamic adjustment process of the display properties of the display module, or to determine the optimal focus parameters of the user's fundus imaging according to the evaluation of the display properties of the display module The image data power spectrum of the user's fundus imaging is dynamically adjusted to determine the best focusing parameters of the user's fundus imaging. 2. The head-mounted display device according to claim 1, wherein: The display module is further used to send the vision detection image signal to the vision detection module; The vision detection module is used to capture the imaging of the vision detection image signal on the fundus of the user, and send an image adjustment command to the image adjustment module based on the imaging state of the vision detection image signal on the fundus of the user. 3. An image adjustment method applied to a head-mounted display device, characterized in that the method comprises: Taking the fundus imaging of the user, dynamically adjusting the display properties of the display module based on the captured fundus imaging state, and determining the best focus parameters of the user's fundus imaging during the dynamic adjustment process of the display properties of the display module; Receive image signal; presenting the image signal based on the display properties of the display module when the best focus parameter is used; The method further includes: Capture the user's iris feature information; Matching the captured iris feature information with the saved user iris feature information to identify the user's identity, and associating the display attributes of the display module when the optimal focus parameter is captured with the captured user iris feature information save; The dynamic adjustment of the display properties of the display module based on the photographed fundus imaging state, and determining the best focus parameters of the user's fundus imaging during the dynamic adjustment process of the display properties of the display module includes: Analyze whether the user's fundus imaging is clear, and if not, dynamically adjust the display properties of the display module; and determine the best focus parameters of the user's fundus imaging by using an automatic focus method during the adjustment process of the display properties of the display module; The determination of the optimal focus parameters of the user's fundus imaging during the dynamic adjustment of the display properties of the display module includes: Determine the optimal focus parameter of the user's fundus imaging according to the grayscale variation relationship between the pixels of the user's fundus imaging during the dynamic adjustment process of the display properties of the display module, or determine the user's fundus imaging during the dynamic adjustment process of the display properties of the display module according to the evaluation The power spectrum of the imaged image data is used to determine the best focusing parameters for the user's fundus imaging. 4. The image adjustment method applied to a head-mounted display device according to claim 3, wherein the display module sends the vision detection image signal in advance; The photographing of the user's fundus imaging, and dynamically adjusting the display properties of the display module based on the photographed fundus imaging state include: The imaging of the vision detection image signal on the user's fundus is captured, and the display properties of the display module are dynamically adjusted based on the imaging state of the vision detection image signal on the user's fundus.