WO2018040169A1 - Method and apparatus for adapting vr device for user vision, and vr device - Google Patents

Abstract

A method for adapting a VR device for user vision. An auxiliary display lens (3) is arranged in the VR device, and when a user needs to use the VR device, the vision condition of the user is acquired and imaging parameters of the auxiliary display lens (3) are adjusted according to the vision condition, so that the adjusted imaging parameters are adapted to the vision condition of the user, thereby guaranteeing that the user can normally watch a virtual scenario provided by the VR device. There is no need to provide dedicated space for the glasses of the user, thereby reducing the size of the VR device; moreover, the imaging parameters of the auxiliary display lens in the VR device can automatically be finely adjusted in a targeted manner according to the acquired vision condition, while the user does not need to carry out a manual rough adjustment according to his/her own current subjective feelings, and this not only improves the adaptability of the VR device to the user's vision, but also reduces manual operations of the user, and improves the user experience. Further disclosed are an apparatus for adapting a VR device for user vision, and a VR device.

Description

Vision method, device and VR device for VR device user vision

This application claims the priority of the Chinese patent application filed on August 31, 2016, the Chinese Patent Office, the application number is 201610797329.4, and the invention name is "a VR device user vision adaptation method, device and VR device". The content is incorporated herein by reference.

Technical field

The present invention relates to the field of VR (Virtual Reality), and in particular, to a method, a device, and a VR device for adapting a user's vision of a VR device.

Background technique

VR is a computer simulation system that can create and experience virtual worlds. It uses a computer-generated simulation environment, which is a multi-source information fusion, interactive 3D dynamic vision and system simulation of physical behavior, which can immerse users in In this environment. It is precisely because the environment simulated by the VR device is close to the real environment. Therefore, in the VR simulation environment, the scene has a distant and near view, and the field of view also has a size. For users with poor eyesight, VR devices must be experienced through some auxiliary means.

For example, on some VR products, space is reserved to place users' glasses, such as Sony PS VR. Although it is a good solution to reserve space for the user's glasses to let the user experience the VR device through the auxiliary tools adapted to their vision, since the future development trend of the VR device is light and compact, the glasses are reserved. The space will inevitably lead to an increase in the size of the VR device, resulting in inconvenient user experience. On the other hand, due to the variety of glasses patterns of users, when designing VR, it is necessary to reserve space according to the shape of most glasses. Therefore, some users' glasses can be placed in the reserved space, while others Personalized, unique or exaggerated glasses may not be placed in the same space, which makes it impossible for users wearing such glasses to experience the VR device.

In order to solve the above problems of the VR device, in other existing VR devices, the distance between the VR display and the user glasses can be adjusted to ensure that the user is watching the simulated environment, but the adjustment must be performed after the user wears the VR device. According to the situation of the user, the distance of the display screen of the VR device is manually adjusted. For example, in the Chinese patent publication No. 205103492U published on March 23, 2016, a scheme is described, as shown in FIG. :

The utility model relates to an adjustable virtual reality glasses between a screen and a lens, comprising an object distance adjustment system. The object distance adjustment system comprises a display screen 11 and a gear wheel 12. The display screen 11 is provided with a gear bar 13 , and the gear bar 13 is embedded with the gear wheel 12 . . The display screen 11 moves as the gear bar 13 moves. The display screen 11 and the gear bar 13 are perpendicular to each other. The user can toggle the gear 12 by his or her own vision to move the gear bar 13 back and forth, thereby moving the display screen 11 back and forth until the user sees it clearly. In this solution, when the user uses the VR device, it must take a period of time to manually adjust the distance of the display screen, and the adjustment is based on the user's subjective feeling, so the adjustment is only subjectively satisfied with the user's current The visual demand does not match the actual visual condition of the user. Especially when the user's eyes remain in a state for a long time, they will become tired. At this time, the user may need to spend more time to adjust the distance between the display and the eyes. . This multiple manual adjustment is not smart enough, which will increase the user's manual operation and reduce the user experience.

Summary of the invention

The invention provides a method, a device and a VR device for adapting a user's vision of a VR device. The solution for manually adjusting the distance between the display screen and the human eye in the prior art is not intelligent enough, and the manual operation process is required to reduce the user experience. The problem.

In order to solve the above technical problems, the present invention adopts the following technical solutions:

A method for adapting visual power of a VR device user includes:

Obtain the visual condition of the user;

And adjusting an imaging parameter of the auxiliary lens in the VR device based on the acquired visual condition, so that the adjusted lens is adapted to the visual condition of the user.

Further, obtaining the visual condition of the user includes:

The visual condition of the user is obtained by detecting at least one of the user's corneal curvature, lens curvature, and eye diopter.

Further, after the adjusting the imaging parameters of the display auxiliary lens in the VR device based on the acquired visual condition, the method further includes:

Obtaining feedback information of the user on the adjustment result, where the feedback information includes information indicating how satisfied the user is with the adjustment result;

Whether it is necessary to continue to adjust the imaging parameters of the display auxiliary lens according to the degree of satisfaction in the feedback information.

Further, the imaging parameter includes at least a refractive index of the display auxiliary lens.

Further, the imaging parameter further includes a distance between the display auxiliary lens and the user's eyes.

Further, the adjusting the imaging parameters of the display auxiliary lens in the VR device based on the acquired visual condition includes:

Determining a lens adjustment value for the vision condition according to a preset strategy;

The imaging parameters of the display auxiliary lens are adjusted according to the determined lens adjustment value.

Further, the preset strategy includes a first mapping relationship between the plurality of vision levels and the lens adjustment value, and determining, according to the preset strategy, the lens adjustment values for the vision condition includes:

Determining the acquired visual acuity level of the visual condition;

And selecting, according to the first mapping relationship, a lens adjustment value corresponding to the vision level as a lens adjustment value for the vision condition.

Further, the preset strategy includes a second mapping relationship between the vision condition and the lens adjustment value, and determining the lens adjustment value for the vision condition according to the preset policy includes:

A lens adjustment value corresponding to the vision condition is calculated according to the vision condition and the second mapping relationship.

An apparatus for adapting vision of a user of a VR device, comprising:

Obtaining a module, configured to obtain a visual condition of the user;

The adjustment module is configured to adjust an imaging parameter of the auxiliary lens displayed in the VR device based on the acquired visual condition, such that the adjusted lens is adapted to the visual condition of the user.

A VR device comprising an imaging aid adjustable display auxiliary lens and an adaptation device of the VR device user vision according to claim 9.

The VR device user vision adapting method, device and VR device provided by the invention provide a display auxiliary lens in the VR device. When the user needs to use the VR device, the user can obtain the visual condition of the user and assist the display according to the visual condition. The imaging parameters of the lens are adjusted such that the imaging parameters of the auxiliary lens after the adjustment are adapted to the visual condition of the user, so that the user can normally view the virtual scene provided by the VR device. In the adaptation scheme of the VR device user vision provided in the embodiment of the present invention, the display auxiliary lens is disposed in the VR device, and the special space of the user glasses is not needed, and the volume of the VR device can be reduced to a certain extent; Moreover, the visual condition of the user can be obtained, and the imaging parameters of the auxiliary lens displayed in the VR device can be automatically fine-tuned according to the acquired visual condition, and the user does not need to manually adjust the imaging according to his current subjective feeling. Not only improves the adaptability of the VR device to the user's vision, but also improves the user experience by reducing the manual operation of the user.

DRAWINGS

1 is a schematic structural diagram of a VR device in the prior art;

2 is a flowchart of a method for adapting a user's vision of a VR device according to Embodiment 1 of the present invention;

FIG. 3 is a schematic diagram showing a mode of displaying an auxiliary lens in a default state according to Embodiment 1 of the present invention; FIG.

FIG. 4 is a schematic diagram showing the state of the display auxiliary lens after being adjusted according to the first embodiment of the present invention; Figure

FIG. 5 is a schematic diagram of another embodiment of the display auxiliary lens after being adjusted according to Embodiment 1 of the present invention; FIG.

6 is a flow chart of adjusting imaging parameters of an auxiliary lens in a VR device according to Embodiment 1 of the present invention;

FIG. 7 is a schematic structural diagram of an apparatus for adapting a user's vision of a VR device according to Embodiment 2 of the present invention; FIG.

FIG. 8 is another schematic structural diagram of an apparatus for adapting a user's vision of a VR device according to Embodiment 2 of the present invention; FIG.

FIG. 9 is a schematic structural diagram of a VR device according to Embodiment 2 of the present invention;

FIG. 10 is a schematic structural diagram of another VR device according to Embodiment 2 of the present invention.

detailed description

Because the two solutions proposed by the user in the prior art to experience the VR device normally have their own defects and problems, the present invention provides an adaptation scheme of the VR device user vision to solve the problem. In the prior art, the user experience is low due to the user glasses not being adapted to the reserved space or the manual operation of the user is too large. In order to enable those skilled in the art to clearly understand the advantages and details of the adaptation scheme of the VR device user's vision provided by the present invention, the scheme will be described in detail below with reference to the accompanying drawings.

Embodiment 1:

In this embodiment, the method for adapting the visual power of the VR device is described. The method can be implemented by the VR device user vision adapting device. Please refer to FIG. 2 below. FIG. 2 is a VR according to the first embodiment of the present invention. A flow chart of the adaptation method of the device user's vision:

S202. The VR device user vision adapting device acquires a visual condition of the user.

The VR device user vision adaptation method provided in this embodiment is mainly applied to the most important application scenario before the user actively experiences the virtual reality scenario by using the VR device, because the user experiences Previously, the VR device was adjusted to a state compatible with the user's visual condition. When the user experienced the VR scene, the user would not be disturbed by the visual factors and the user experience could be improved.

In the VR device user vision adaptation method provided by the embodiment, the manner in which the VR device user vision adapting device acquires the user's visual condition includes the following methods:

The first type of visual acuity device by the VR device user automatically detects the visual condition of the user, which is similar to the computer optometry process performed before the purchase of the glasses. The automatic detection of the user's visual condition applies the Schneider principle, the power meter principle, and the retinoscopy principle. All three principles are to obtain a clear image on the retina of the eye to be inspected by a movable lens, and then calculate the degree or displacement of the desired lens by different methods to obtain the diopter of the eye to be inspected. In the actual process, a VR device user vision adapting device can emit a specific wavelength of infrared light through the eyeball, lens, aqueous humor and other eyeball organs of the user's eye, and finally project to the eyeball retina, and then reflect back to the corresponding optics of the instrument. The system then receives the CCD (Charge-coupled Device), converts the optical signal into an electrical signal, decomposes the spherical mirror, the cylindrical mirror, the axial position and other data, and finally obtains various parameters that characterize the user's vision through calculation. .

Because the human eye imaging system mainly includes cornea, aqueous humor, lens, and glass. If they are equivalent to a spherical refraction system, the focal length of this spherical refraction system depends on the combined radius of curvature and overall refractive index of all the above-mentioned tissues, of which the cornea and the lens are the most decisive. The cornea is a transparent, avascular tissue that is the most effective refractive surface in the optical system of the eye. To form a clear image on the retina, the cornea is required to have transparency and proper refractive power. The curvature of the lens is more important, which basically determines whether a user's vision is normal, nearsighted or farsighted. The curvature of the lens surface is variable and it is controlled by the suspensory ligament. When the human eye observes objects at different distances, the brain will produce an effort to observe the object clearly. The nervous system changes the tension of the suspensory ligament, thereby changing the tension of the suspensory ligament, thereby changing the radius of curvature of the lens to achieve clear imaging. purpose.

In addition, the role of the eye to refract light is called refraction, and the power of refractive power to express refraction is called diopter. The eye does not use the refractive state of the adjustment, called static refraction, the standard eye static refraction Power +58.64D. The refractive state of the human eye when using adjustment is called dynamic refraction, and its power is stronger than the power of static refraction. The stronger the power, the shorter the focal length.

Based on the above description, it should be understood by those skilled in the art that the visual condition in this embodiment can be characterized by at least parameters such as corneal curvature, lens curvature, and eye diopter. In this embodiment, when the VR device user vision adapting device acquires the visual state of the user, at least one of the user's corneal curvature, lens curvature, and eye diopter can be detected to obtain the visual state of the user, in order to make the obtained detection result more Accurate, so that the VR device can be adapted to the user's needs according to the user's vision condition. In an example of the embodiment, the VR device user vision adapting device can simultaneously perform the three dimensions on the user's eyes. Detection.

In addition to the above-described manner of automatically detecting the visual condition of the user, another example of the present embodiment provides a way of acquiring the visual condition of the user - input by the user. Many users will be exposed to professional optometry in their daily lives. For example, there will be professional eye examinations in the physical examination program, and users who change glasses frequently will also undergo optometry from time to time. Regardless of the way, as long as the user can obtain his or her vision status, the relevant parameters can be input into the VR device user vision adapting device, so that the VR device user visual acuity device obtains the user's vision through the user's input. situation. The relevant parameters input by the user may also be at least one of corneal curvature, lens curvature, and spectacles diopter.

It can be understood that the two methods for obtaining the visual condition of the user have advantages. For example, the first automatic detection method is to detect the visual state of the user when the user needs to use the VR device, and the detection result is real-time. It can reflect the current visual condition of the user. Compared with the second scheme of inputting the visual condition by the user, the visual condition obtained by the solution is more accurate and closer to the real-time situation of the user, and can provide the subsequent adjustment and adaptation process. More accurate reference. The automatic detection scheme requires the VR device user vision adapting device to have the ability to detect vision conditions, which requires setting up more visual acuity detection devices in the VR device user vision adapting device, which may result in VR device users. The increase in the volumetric weight of the vision-adaptive device, on the other hand, also increases the cost of the vision-adaptive device of the VR device user. VR device user vision adapter device as VR An auxiliary device of the device, whether it is increased in volume or increased in cost, will cause inconvenience to consumers. In the second scheme, in practical applications, only one input interface is needed to obtain various parameters representing the user's vision from the user, although the acquired parameters are relatively low in real time, but because of the cost of setting the input interface. The cost of setting up various vision detecting devices is much lower, so for the user, the second way to obtain vision conditions is still relatively high.

In some examples of the embodiment, the two schemes for acquiring the visual condition of the user may be integrated. When the user has learned the more accurate vision condition, the visual condition can be directly input to the VR device user vision through input. In the adaptation device, if the user does not temporarily obtain the vision condition, the VR device user vision adaptation device can directly control the automatic detection.

S204. The VR device user vision adapting device adjusts an imaging parameter of the auxiliary lens displayed in the VR device based on the acquired vision condition.

After the VR device user vision adapting device acquires the visual condition of the user, the VR device user visual acuity adapting device can adjust the imaging parameters of the auxiliary lens displayed in the VR device according to the visual condition of the user. The imaging parameters that display the auxiliary lens after the adjustment are adapted to the actual visual condition of the user, and can truly assist the user in viewing the experience of the virtual reality scene.

In this embodiment, displaying the imaging parameters of the auxiliary lens includes at least displaying the refractive index of the auxiliary lens. The refractive index of a medium refers to the ratio of the speed at which light travels in a vacuum to the speed at which light travels in the medium. Obviously, the refractive index has a great relationship with the material of the medium, but in the present embodiment, the display auxiliary lens in the VR device has been set up, and if the material is temporarily changed, it is unlikely to be realized, and the temporary replacement of another material is different. The lens as a display auxiliary lens also has more difficulties in the process of implementation. However, since the display auxiliary lens is essentially a lens, the refractive index of a lens is not only related to the material forming the lens, but also related to the shape of the lens. For example, two lenses having the same material and the same center thickness have thinner edges. The refractive index of the lens will be higher. Therefore, in the present embodiment, the refractive index can be changed by temporarily changing the form of the display auxiliary lens.

In an example of the embodiment, the auxiliary lens is displayed as a liquid lens, as shown in FIG. The auxiliary lens 3 is flat, and has no convergence effect on the light, and has no divergence. When the visual adaptor of the VR device detects that the visual condition of the user is myopia, the auxiliary lens 3 can be displayed according to the degree of myopia of the user. Adjusted to the concave lens 3', as shown in Fig. 4, the concave lens 3' can have different divergence effects on the light depending on its own curvature, so that the image originally falling before the retina is moved back to the retina. If it is determined that the user belongs to the far vision according to the acquired vision condition, the VR device user vision adapting device can adjust the shape of the auxiliary lens 3 shown in FIG. 3 to form the convex lens 3" in FIG. 5, which will be concentrated after the retina The light is focused so that the focused light is imaged on the retina.

By default, the liquid display auxiliary lens can be maintained in the state shown in Figure 3, i.e., the display auxiliary lens is maintained in a state in which there is no convergence or divergence to the light. It will be apparent to those skilled in the art that the various aspects of the display auxiliary lens shown in Figures 3-5 are merely for making it easier and more clear to those skilled in the art to understand the present embodiment. As an example, the curvature of the auxiliary lens shown in each figure should not be construed as limiting the scope of the embodiment.

On the basis of adjusting the refractive index of the display auxiliary lens, it is also possible to assist in adjusting the distance between the display auxiliary lens and the user glasses, because the distance between the display auxiliary lens and the user glasses can also greatly affect the user's view. The clarity of the object.

Based on the above description, it should be understood that when the imaging parameters of the display auxiliary lens are adjusted according to the visual condition, the refractive index of the auxiliary lens may be separately adjusted, or the distance between the auxiliary lens and the user's eyes may be separately adjusted, but The size of the VR device is limited. Therefore, the range in which the auxiliary lens can be moved in the VR device is limited. For a user with a nearsightedness or a farsightedness, it is difficult to completely adjust the distance between the auxiliary lens and the user's eyes. It is ensured that the user experiences the VR device normally. Therefore, in the present embodiment, it is a common practice to simultaneously adjust the refractive index of the auxiliary lens and its distance from the user's eyes.

For the process of adjusting the auxiliary display lens imaging parameters according to the vision condition, the embodiment provides an implementation manner. Please refer to FIG. 6 below:

S602. Determine a lens adjustment value for a vision condition according to a preset policy.

According to the preset strategy and the acquired vision condition, the lens adjustment value for the current user can be obtained. This embodiment provides two ways of obtaining the lens adjustment value:

First, after acquiring the visual condition of the user, it may determine, according to a predetermined division rule, which visual power level the visual condition belongs to, for example, a visual state in which the curvature of the lens is in the range of x1 to x2 belongs to the first visual power level, and the lens The visual condition in which the curvature is in the range of x2 to x3 belongs to the second level of vision, and the visual condition in which the curvature is in the range of x3 to x4 belongs to the third level of vision. At the same time, the first mapping relationship between each vision level and the lens adjustment value is included in the preset strategy. For example, in the first mapping relationship, the first vision level corresponds to the lens adjustment value a1, and the second vision level and the first The three vision levels correspond to the lens adjustment values a2 and a3, respectively. When the value of the curvature of the lens in the acquired visual condition of a user is between x2-x3, it is determined that the visual acuity of the user belongs to the second visual acuity level, and the lens for the visual state of the user can be determined according to the first mapping relationship. The adjustment value is a2.

In the first determination mode, the finally obtained lens adjustment value is not completely adapted to the user's vision condition, and the degree of adaptation depends on the fineness of the division of the vision level in the preset strategy, and the finer the division of the vision level, The final matching lens adjustment value is more suitable for the actual visual condition of the user, and the closer to the actual needs of the user. Conversely, the coarser the division of the visual acuity, the greater the deviation between the final matching lens adjustment value and the actual actual demand of the user. Another way to determine the lens adjustment value is presented below.

Secondly, the second mapping relationship between the vision condition and the lens adjustment value is included in the preset strategy, that is, different vision conditions are corresponding to the corresponding lens adjustment values through the second mapping relationship, in this determination. In the mode, the second mapping relationship may be a formula for calculating a lens adjustment value by a vision condition, and the lens adjustment value directly calculated by the formula is a lens adjustment value that is closest to the user's vision state in the second mapping relationship, and therefore, the determination The adjustment of the mode is more precise. Compared with the first determination mode, the visual condition should be roughly divided into an eyesight level, and then the corresponding lens adjustment parameter can be determined. This lens adjustment is directly determined according to the second mapping relationship. Reference The number is more in line with the actual needs of users.

S604. Adjust imaging parameters of the display auxiliary lens according to the determined lens adjustment value.

After the lens adjustment value is obtained by the matching or the calculation process, the imaging parameters such as the refractive index of the auxiliary lens or the distance between the user's eyes can be adjusted.

Since the lens adjustment value can refer to the current user's vision condition, it is required to display the state that the imaging parameters of the auxiliary lens can be adjusted after adjustment, and it can also be the adjustment range that needs to be adjusted. Taking the refractive index adjustment of the auxiliary lens as an example, it is assumed that the refractive index of the lens adapted to the current visual state of the user is X1, and the current refractive index of the auxiliary lens is displayed as X2, if the lens adjustment value is indicative of the adjustment should be achieved. The parameter, then the lens adjustment value is X1, that is, the characterization needs to adjust the refractive index of the display auxiliary lens to X1. If the lens adjustment value characterizes the adjustment amplitude of the adjustment, then the lens adjustment value is X1-X2, and the lens adjustment value characterizes the need to display the current refractive index of the auxiliary lens by X1-X2 to achieve the final desired refractive index. X1.

Finally, after the adjustment is completed, the feedback information of the user on the adjustment may be acquired, and the satisfaction degree of the user is obtained according to the feedback information, and whether the imaging parameter of the auxiliary display lens needs to be further adjusted according to the satisfaction degree of the user. If necessary, you can regain the user's vision status. In order to facilitate user feedback, after the adjustment of the display auxiliary lens is completed, the user may be sent an inquiry message to prompt the user to feed back the satisfaction information, and the inquiry information may be displayed in a selected manner, for example, including a limited number of options, different options. To characterize the different satisfactions of users, the simplest query information directly includes two options of “satisfaction” and “unsatisfactory”. When the user selects "satisfactory", the entire adjustment process is ended, and if the user selects "unsatisfactory", a new round of adjustment is required. In order to facilitate the adaptation of the VR device user's vision, the device can be more quickly and more targeted in the process of continuing the adjustment. The information fed back by the user may also include an adjustment instruction issued by the user according to his subjective feeling, and the adjustment instruction is the user's expectation. The adjustment action made by the adaptation device of the VR device user's vision.

The method for adapting the visual power of the VR device provided by the embodiment provides the visual state of the user, and displays the presentation parameters of the auxiliary lens in the VR device based on the acquired visual state of the user. Automatic adjustment of the line avoids the problem that the user experience is low in the prior art, which can only be manually adjusted by the user according to his subjective feeling after the VR device is worn; and in the prior art In the scheme of separately adjusting the distance between the display screen and the user's eyes, because of the limitation of the volume of the VR device, the range in which the display screen can be moved is limited, which causes the VR device to not be able to serve the user with deep myopia or deep vision. In this embodiment, the refractive index of the display auxiliary lens in the VR device can be adjusted, and the user can normally experience the normal use of the VR device by adjusting the distance when the distance between the display screen and the user's eyes is constant. VR device.

Embodiment 2:

The embodiment of the present invention provides a VR device user vision adapting device, and the VR device user visual acuity adapting device can perform the VR device user visual acuity adaptation method provided in the first embodiment. Specifically, the VR device user vision adapting device is shown in Figure 7:

The VR device user vision adaptation device 70 includes an acquisition module 702 and an adjustment module 704. The obtaining module 702 is configured to acquire a visual condition of the user. The adjustment module 704 is configured to adjust the imaging parameters of the auxiliary lens displayed in the VR device based on the visual condition acquired by the acquisition module 702.

In the VR device user vision adapting device 70 provided in this embodiment, the manner in which the obtaining module 702 obtains the visual state of the user includes the following methods:

The first type is automatically detected by the acquisition module 702 by the user's vision condition, which is similar to the computer optometry process performed prior to the purchase of the glasses. The automatic detection of the user's visual condition applies the Schneider principle, the power meter principle, and the retinoscopy principle. All three principles are to obtain a clear image on the retina of the eye to be inspected by a movable lens, and then calculate the degree or displacement of the desired lens by different methods to obtain the diopter of the eye to be inspected. In the actual process, the infrared light of a specific wavelength can be transmitted through the acquisition module 702 through the eyeballs of the user's cornea, lens, aqueous humor, etc., and finally projected onto the retina of the eyeball, and then reflected back to the corresponding optical system of the instrument and then CCD (Charge-coupled Device) receives and converts the optical signal into an electrical signal, which decomposes the spherical mirror and the column The data of the mirror, the axial position and the like, and finally the acquisition module 702 obtains various parameters that characterize the user's vision through calculation.

Because the human eye imaging system mainly includes cornea, aqueous humor, lens, and glass. If they are equivalent to a spherical refraction system, the focal length of this spherical refraction system depends on the combined radius of curvature and overall refractive index of all the above-mentioned tissues, of which the cornea and the lens are the most decisive. The cornea is a transparent, avascular tissue that is the most effective refractive surface in the optical system of the eye. To form a clear image on the retina, the cornea is required to have transparency and proper refractive power. The curvature of the lens is more important, which basically determines whether a user's vision is normal, nearsighted or farsighted. The curvature of the lens surface is variable and it is controlled by the suspensory ligament. When the human eye observes objects at different distances, the brain will produce an effort to observe the object clearly. The nervous system changes the tension of the suspensory ligament, thereby changing the tension of the suspensory ligament, thereby changing the radius of curvature of the lens to achieve clear imaging. purpose.

In addition, the role of the eye to refract light is called refraction, and the power of refractive power to express refraction is called diopter. The eye does not use the refractive state of the adjustment, called static refraction, the power of the standard eye static refraction +58.64D. The refractive state of the human eye when using adjustment is called dynamic refraction, and its power is stronger than the power of static refraction. The stronger the power, the shorter the focal length.

Based on the above description, it should be understood by those skilled in the art that the visual condition in this embodiment can be characterized by at least parameters such as corneal curvature, lens curvature, and eye diopter. In the embodiment, when the acquiring module 702 acquires the visual state of the user, at least one of the corneal curvature, the lens curvature, and the eye diopter may be detected to obtain the visual condition of the user, so that the acquired detection result is more accurate, so as to be followed. According to the visual condition of the user, the VR device is adapted to be closer to the user's needs. In an example of the embodiment, the obtaining module 702 can perform the detection of the three dimensions on the user's eyes at the same time.

In addition to the above-described manner of automatically detecting the visual condition of the user, another example of the present embodiment provides a way of acquiring the visual condition of the user - input by the user. Many users will be exposed to professional optometry in their daily lives. For example, there will be professional eye examinations in the physical examination program, and users who change glasses frequently will also undergo optometry from time to time. No matter how it is, as long as the user can To obtain the visual condition of the user, the relevant parameter can be input into the obtaining module 702, and the obtaining module 702 can obtain the visual condition of the user through the input of the user. The relevant parameters input by the user may also be at least one of corneal curvature, lens curvature, and spectacles diopter.

It can be understood that the two methods for obtaining the visual state of the user by the obtaining module 702 have advantages. For example, the first automatic detection method is to detect the visual state of the user when the user needs to use the VR device, and the detection result is It has real-time performance and can reflect the current visual condition of the user. Compared with the second scheme of inputting vision status by the user, the visual status obtained by the program is more accurate and closer to the user's real-time situation, which can be adjusted for subsequent adjustment. The matching process provides a more accurate reference. The automatic detection scheme requires the acquisition module 702 to have the ability to detect vision conditions, which requires setting more visual detection devices in the VR device user vision adaptation device 70, which may result in visual adaptation of the VR device user. The increased volumetric weight of the device 70, on the other hand, also increases the cost of the VR device user vision adapter device 70. The VR device user vision adapting device 70 is an auxiliary device of the VR device, which causes inconvenience to the consumer regardless of the increase in volume and weight or the increase in cost. In the second solution, in practical applications, only one input interface is needed to obtain various parameters representing the user's vision from the user, although the parameters obtained by the acquisition module 702 are relatively low in real time, but because the input is set. The cost of the interface is much lower than the cost of setting various vision detecting devices, so for the user, the second mode of obtaining the visual condition of the obtaining module 702 is relatively high.

In some examples of the embodiment, the obtaining module 702 can simultaneously have the capability of using the above two solutions. When the user has obtained a relatively accurate vision condition, the obtaining module 702 can obtain the visual state of the user by receiving the input of the user. If the user does not obtain his or her vision condition temporarily, the obtaining module 702 can directly perform automatic detection.

After the acquisition module 702 obtains the visual condition of the user, the adjustment module 704 can adjust the imaging parameters of the auxiliary lens displayed in the VR device according to the visual condition of the user. The imaging parameters that display the auxiliary lens after the adjustment are adapted to the actual visual condition of the user, and can truly assist the user in viewing the experience of the virtual reality scene.

In this embodiment, displaying the imaging parameters of the auxiliary lens includes at least displaying the refractive index of the auxiliary lens. The refractive index of a medium refers to the ratio of the speed at which light travels in a vacuum to the speed at which light travels in the medium. Obviously, the refractive index has a great relationship with the material of the medium, but in the present embodiment, the display auxiliary lens in the VR device has been set up, and if the material is temporarily changed, it is unlikely to be realized, and the temporary replacement of another material is different. The lens as a display auxiliary lens also has more difficulties in the process of implementation. However, since the display auxiliary lens is essentially a lens, the refractive index of a lens is not only related to the material forming the lens, but also related to the shape of the lens. For example, two lenses having the same material and the same center thickness have thinner edges. The refractive index of the lens will be higher. Therefore, in the present embodiment, the refractive index can be changed by temporarily changing the form of the display auxiliary lens.

In an example of the embodiment, the auxiliary lens is displayed as a liquid lens. As shown in FIG. 3, the auxiliary lens 3 is shown to be planar, and has no convergence effect on light, and has no divergence. When the acquisition module 702 detects the user. After the vision condition is nearsighted, the adjustment module 704 can adjust the display auxiliary lens 3 to the concave lens 3' according to the degree of myopia of the user. As shown in FIG. 4, the concave lens 3' can produce different light according to its own curvature. The divergence causes the image that originally landed on the retina to move back to the retina. If it is determined that the user belongs to the far vision according to the visual condition acquired by the obtaining module 702, the adjustment module 704 can adjust the form of the auxiliary lens 3 shown in FIG. 3 to form the convex lens 3" in FIG. 5, which will be concentrated after the retina The light is focused so that the focused light is imaged on the retina. By default, the liquid display auxiliary lens can be maintained in the state shown in Figure 3, ie, the display auxiliary lens remains in a non-convergence effect on the light. In the state of divergence.

The adjustment module 704 can also adjust the distance between the display auxiliary lens and the user glasses on the basis of adjusting the refractive index of the display auxiliary lens, because the distance between the display auxiliary lens and the user glasses can also be largely Affect the clarity of the user's view.

Based on the above description, it should be understood that when the imaging parameters of the auxiliary lens are adjusted according to the visual condition, the adjustment module 704 can separately adjust the refractive index of the auxiliary lens, and can separately adjust the distance between the auxiliary lens and the user's eyes. But due to the limited size of VR devices, Therefore, the range in which the auxiliary lens can be moved in the VR device is limited. For a user with a nearsightedness or a farsightedness, it is difficult to completely adjust the distance between the auxiliary lens and the user's eyes to ensure that the user experiences the VR device normally. Therefore, in the present embodiment, it is more common to adjust the module 704 to simultaneously adjust the refractive index of the auxiliary lens and its distance from the user's eyes.

When the adjustment module 704 adjusts the auxiliary display lens imaging parameters according to the vision condition, the lens adjustment value for the vision condition may be first determined according to the preset strategy, and the imaging parameters of the display auxiliary lens are adjusted according to the determined lens adjustment value.

When the adjustment module 704 determines the lens adjustment value for the vision condition, the lens adjustment value for the current user may be acquired according to the preset strategy and the acquired vision condition. The embodiment provides two ways of obtaining the lens adjustment value:

First, after the acquisition module 702 obtains the visual condition of the user, the adjustment module 704 can determine, according to a predetermined division rule, which visual power level the visual condition belongs to, for example, the visual condition in which the curvature of the lens is in the range of x1 to x2 is predetermined. The first vision level, the vision condition in which the lens curvature is in the x2 to x3 category belongs to the second vision level, and the visual condition in the x3 to x4 category belongs to the third vision level. At the same time, the first mapping relationship between each vision level and the lens adjustment value is included in the preset strategy. For example, in the first mapping relationship, the first vision level corresponds to the lens adjustment value a1, and the second vision level and the first The three vision levels correspond to the lens adjustment values a2 and a3, respectively. When the value of the curvature of the lens in the visual state of the user acquired by the acquisition module 702 is between x2-x3, the adjustment module 704 determines that the visual acuity of the user belongs to the second visual acuity level, and the adjustment module 704 is configured according to the first mapping relationship. The lens adjustment value for the visual condition of the user can be determined to be a2.

In the first determination mode, the lens adjustment value finally obtained by the adjustment module 704 is not completely adapted to the visual condition of the user, and the degree of adaptation depends on the degree of fineness of the division of the vision level in the preset strategy, and the degree of the divided vision level is more Fine, the final matching lens adjustment value is more suitable for the actual visual condition of the user, and the closer to the actual needs of the user. Conversely, the more roughly the grade of vision is divided, then The final matching lens adjustment value is more deviated from the actual actual demand of the user. Another way to determine the lens adjustment value is presented below.

Secondly, the second mapping relationship between the vision condition and the lens adjustment value is included in the preset strategy, that is, different vision conditions are corresponding to the corresponding lens adjustment values through the second mapping relationship, in this determination. In the mode, the second mapping relationship may be a formula for calculating a lens adjustment value by using a vision condition, and the lens adjustment value directly calculated by the adjustment module 704 by using the formula is a lens adjustment value that is closest to the user's vision state in the second mapping relationship. The adjustment of the determination mode is more elaborate. Compared with the first determination mode, the visual condition should be roughly divided into an eyesight level, and then the corresponding lens adjustment parameter can be determined, which is directly determined according to the second mapping relationship. The lens adjustment parameters are more in line with the actual needs of the user.

After the adjustment module 704 obtains the lens adjustment value through the matching or the calculation process, the imaging parameters such as the refractive index of the auxiliary lens or the distance between the user's eyes can be adjusted.

Since the lens adjustment value can refer to the current user's vision condition, it is required to display the state that the imaging parameters of the auxiliary lens can be adjusted after adjustment, and it can also be the adjustment range that needs to be adjusted. Taking the refractive index adjustment of the auxiliary lens as an example, it is assumed that the refractive index of the lens adapted to the current visual state of the user is X1, and the current refractive index of the auxiliary lens is displayed as X2, if the lens adjustment value is indicative of the adjustment should be achieved. The parameter, then the lens adjustment value is X1, that is, the characterization needs to adjust the refractive index of the display auxiliary lens to X1. If the lens adjustment value characterizes the adjustment amplitude of the adjustment, then the lens adjustment value is X1-X2, and the lens adjustment value characterizes the need to display the current refractive index of the auxiliary lens by X1-X2 to achieve the final desired refractive index. X1.

In another VR device user vision adaptation device 70 provided by this embodiment, as shown in FIG. 8, the VR device user vision adaptation device 70 includes an acquisition module 702, an adjustment module 704, and a feedback receiving module 706. The feedback receiving module 706 is configured to obtain the feedback information of the user after the adjustment of the adjustment module 704, obtain the satisfaction degree of the user from the feedback information, and finally determine whether the auxiliary display lens needs to be imaged according to the satisfaction degree of the user. The parameters are further adjusted. If necessary, the notification acquisition module 702 reacquires the visual condition of the user, by adjusting the mode Block 704 continues with the adjustment. In order to facilitate user feedback, the feedback receiving module 706 may send an inquiry message to the user after the one adjustment of the display auxiliary lens is completed, prompting the user to feedback the satisfaction information, and the inquiry information may be displayed in a selected manner, for example, including a limited number of options. Different options represent different satisfactions of users. The simplest query information directly includes two options of “satisfaction” and “unsatisfactory”. When the user selects "satisfactory", the entire adjustment process is ended, and if the user selects "unsatisfactory", a new round of adjustment is required. In order to facilitate the adaptation of the VR device user's vision, the device can be more quickly and more targeted in the process of continuing the adjustment. The information fed back by the user may also include an adjustment instruction issued by the user according to his subjective feeling, and the adjustment instruction is the user's expectation. The adjustment action made by the adaptation device of the VR device user's vision. After receiving the feedback information of the type, the feedback receiving module 706 can directly send the feedback information to the adjustment module 704, and the adjustment module 704 further adjusts according to the adjustment action in the feedback information.

Finally, the embodiment further provides a VR device. As shown in FIG. 9, in the VR device 9, the VR device user vision adapting device 70 shown in FIG. 7 or FIG. 8 is deployed, and the VR device user vision adapts. The acquisition module 702, the adjustment module 704, and the feedback receiving module 706 in the device 70 may be implemented by an integrated circuit disposed in the VR device 9, in an example of the embodiment, the VR device user vision adapting device 70 is disposed through The SoC (System on Chip) in the VR device 9 is implemented. If the acquisition module 702 directly obtains the user's visual condition by acquiring user input, the function of the acquisition module 702 can be implemented through the input interface of the SoC. The module 702 needs to automatically detect the user's vision condition, and the function of the acquisition module 702 can be implemented by the responsive functional circuit and the SoC's microcontroller. The function of the adjustment module 704 can be implemented by the SoC's microcontroller and the input and output bus bridge. Finally, the feedback receiving module 706 can be implemented by the SoC's input and output interface and the bus bridge.

The VR device user vision adapting device and the VR device provided by the embodiment automatically obtain the visual condition of the user, and automatically adjust the presentation parameters of the auxiliary lens displayed in the VR device based on the acquired visual state of the user, thereby avoiding the existing In the technology, the user can only manually adjust the display screen in the VR device according to his subjective feeling after wearing the VR device. Experience low problems; and in the prior art, the scheme of separately adjusting the distance between the display screen and the user's eyes, because of the limitation of the size of the VR device, the display screen can be moved in a limited range, resulting in the VR device not being good for myopia. Or the problem of user service with a deeper degree of farsightedness, and in this embodiment, by adjusting the refractive index of the display auxiliary lens in the VR device, it is possible to ensure the original passage by adjusting the refractive index under a certain distance between the display screen and the user's eyes. Adjusting the distance does not work properly. Users of VR devices use VR devices normally.

FIG. 10 is a schematic structural diagram of another VR device according to Embodiment 2 of the present invention. The VR device 9 in the embodiment of the present invention includes at least one processor 90, such as a CPU, and at least one memory 94. The memory 94 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory.

The processor 90 can execute the operating system of the VR device 9 and various installed applications, program codes, and the like. For example, each module described above includes the acquiring module 702, the adjusting module 704, and the like.

Program code is stored in the memory 94, and the processor 90 can invoke program code stored in the memory 94 to perform related functions. For example, the various modules (eg, the acquisition module 702, the adjustment module 704, etc.) described in FIGS. 7 and 8 are program code stored in the memory 94 and executed by the processor 90. Thereby implementing the functions of the respective modules.

In one embodiment of the invention, the memory 94 stores a plurality of instructions that are executed by the processor 90 to implement an adaptation method of VR device user vision. Specifically, performing, by the processor 90, the plurality of instructions includes: acquiring a visual condition of the user; and adjusting an imaging parameter of the auxiliary lens displayed in the VR device based on the acquired visual condition, so that the adjustment The rear lens is adapted to the visual condition of the user.

In a further embodiment, obtaining the visual condition of the user comprises acquiring the visual condition of the user by detecting at least one of a corneal curvature, a lens curvature, and an eye diopter of the user.

In a further embodiment, after the adjusting the imaging parameters of the display auxiliary lens in the VR device based on the acquired visual condition, the method further comprises: acquiring a user's adjustment result The feedback information includes information indicating that the user is satisfied with the adjustment result; and determining whether it is necessary to continue to adjust the imaging parameter of the display auxiliary lens according to the satisfaction degree in the feedback information.

In a further embodiment, the imaging parameter includes at least a refractive index of the display auxiliary lens.

In a further embodiment, the imaging parameter further comprises a distance between the display assist lens and the user's eye.

In a further embodiment, the adjusting the imaging parameters of the display auxiliary lens in the VR device based on the acquired visual condition comprises: determining a lens adjustment value for the visual condition according to a preset strategy; The imaging parameters of the display auxiliary lens are adjusted according to the determined lens adjustment value.

In a further embodiment, the preset strategy includes a first mapping relationship between the plurality of vision levels and the lens adjustment value, and determining, according to the preset strategy, the lens adjustment value for the vision condition comprises: determining to obtain The visual acuity level in which the visual acuity condition is located; the lens adjustment value corresponding to the visual acuity level is selected as the lens adjustment value for the visual acuity condition according to the first mapping relationship.

In a further embodiment, the preset strategy includes a second mapping relationship between the vision condition and the lens adjustment value, and determining, according to the preset strategy, the lens adjustment value for the vision condition comprises: according to the vision condition A lens adjustment value corresponding to the vision condition is calculated from the second mapping relationship.

For details, refer to the description of the related steps in the corresponding embodiment in FIG. 2 and FIG. 6 for the specific implementation of the above-mentioned instructions by the processor 90, and details are not described herein.

The above is a further detailed description of the present invention in connection with the specific embodiments, and the specific embodiments of the present invention are not limited to the description. It will be apparent to those skilled in the art that the present invention may be made without departing from the spirit and scope of the invention.

Claims (10)

A method for adapting visual power of a VR device user includes: Obtain the visual condition of the user; And adjusting an imaging parameter of the auxiliary lens in the VR device based on the acquired visual condition, so that the adjusted lens is adapted to the visual condition of the user. The method for adapting a user's vision of a VR device according to claim 1, wherein acquiring the visual condition of the user comprises: The visual condition of the user is obtained by detecting at least one of the user's corneal curvature, lens curvature, and eye diopter. The VR device user vision adapting method according to claim 1, wherein the adjusting the imaging parameters of the display auxiliary lens in the VR device based on the acquired visual condition further comprises: Obtaining feedback information of the user on the adjustment result, where the feedback information includes information indicating how satisfied the user is with the adjustment result; Whether it is necessary to continue to adjust the imaging parameters of the display auxiliary lens according to the degree of satisfaction in the feedback information. The method for adapting a user's vision of a VR device according to claim 1, wherein the imaging parameter comprises at least a refractive index of the display auxiliary lens. The method for adapting a user's vision of a VR device according to claim 4, wherein the imaging parameter further comprises a distance between the display auxiliary lens and the user's eyes. The method for adapting the visual acuity of the VR device according to any one of claims 1 to 5, wherein the adjusting the imaging parameter of the auxiliary lens in the VR device based on the acquired visual condition include: Determining a lens adjustment value for the vision condition according to a preset strategy; The imaging parameters of the display auxiliary lens are adjusted according to the determined lens adjustment value. The VR device user vision adapting method according to claim 6, wherein the preset strategy includes a first mapping relationship between a plurality of visual power levels and a lens adjustment value, and determining, according to the preset policy, The lens adjustment values of the vision condition include: Determining the acquired visual acuity level of the visual condition; And selecting, according to the first mapping relationship, a lens adjustment value corresponding to the vision level as a lens adjustment value for the vision condition. The VR device user vision adapting method according to claim 6, wherein the preset policy includes a second mapping relationship between the vision condition and the lens adjustment value, and determining, according to the preset policy, the Lens adjustment values for vision conditions include: A lens adjustment value corresponding to the vision condition is calculated according to the vision condition and the second mapping relationship. An apparatus for adapting a user's vision of a VR device, comprising: Obtaining a module, configured to obtain a visual condition of the user; The adjustment module is configured to adjust an imaging parameter of the auxiliary lens displayed in the VR device based on the acquired visual condition, such that the adjusted lens is adapted to the visual condition of the user. A VR device characterized by comprising an auxiliary lens for adjusting an imaging parameter and an adapting device for a user's vision of the VR device according to claim 9.

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