CN110879469A - Head-mounted display equipment - Google Patents
Head-mounted display equipment Download PDFInfo
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- CN110879469A CN110879469A CN201911063134.7A CN201911063134A CN110879469A CN 110879469 A CN110879469 A CN 110879469A CN 201911063134 A CN201911063134 A CN 201911063134A CN 110879469 A CN110879469 A CN 110879469A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0176—Head mounted characterised by mechanical features
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0179—Display position adjusting means not related to the information to be displayed
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0179—Display position adjusting means not related to the information to be displayed
- G02B2027/0187—Display position adjusting means not related to the information to be displayed slaved to motion of at least a part of the body of the user, e.g. head, eye
Abstract
The application provides a head-mounted display device to the realization is according to the position of the effective display area of user's pupil's position adjustment display module assembly, and improves and adjusts the convenience. Head-mounted display device includes the frame and sets up in two display module assemblies of frame, and two display module assemblies correspond two eyes settings of user respectively, and every display module assembly includes display screen, free-form surface lens and adjustment mechanism, wherein: the display screen is assembled on the frame in a sliding mode along a first direction; the free-form surface lens at least comprises a first optical surface arranged corresponding to eyes of a user, and the free-form surface lens is used for guiding and projecting light rays emitted by the display screen to the first optical surface so as to form an effective display area on the first optical surface; the adjusting mechanism is connected with the display screen and used for driving the display screen to slide so as to adjust the position of the effective display area on the first optical surface; wherein, first direction is the direction of arranging of the free-form surface lens of two display module assemblies.
Description
Technical Field
The application relates to the technical field of augmented reality, in particular to a head-mounted display device.
Background
Augmented Reality (AR) is a technology which calculates the position and angle of a camera in real time, adds a corresponding image technology, sleeves a virtual world on a screen in the real world and interacts with the real world, overlaps entity information which is difficult to experience in a certain time space range of the real world originally, and uses scientific technologies such as computers and the like to simulate and then superimpose the entity information, applies virtual information to the real world and is perceived by human senses, thereby achieving the sense experience beyond reality.
At present, free-form surface display technology has more applications in the field of AR head-mounted display equipment, and the problem of limited view field of the display equipment can be improved to a certain extent by utilizing a free-form surface lens, and the optical performance of an optical system of the display equipment is optimized. The volume and the mass of the free-form surface lens directly influence the whole volume and the mass of the equipment, and in order to ensure the wearing comfort of the equipment, the volume and the mass of the free-form surface lens are relatively small as much as possible, so that the thickness of the free-form surface lens cannot be overlarge. Due to the positive correlation characteristic of the size of the exit pupil area and the thickness of the free-form surface lens, the exit pupil area of the existing display equipment applying the free-form surface lens is relatively small, and the difficulty in adjusting the exit pupil area according to the pupil distance of a user is high during design, so that the display equipment is not suitable for the wearing requirements of user groups with different pupil distances; even for the same user, because the user can rotate the eyes in the process of using the display device, the pupil position or the pupil distance can also be changed, and the existing display device is difficult to ensure that the pupils of the user always fall in the exit pupil area.
Disclosure of Invention
The application provides a head-mounted display device for the position of the effective display area of the position adjustment display module assembly according to the pupil of the user is realized, and the convenience of adjustment is improved.
In a first aspect, the application provides a head-mounted display device, this head-mounted display device includes frame and two display module assemblies, and two display module assemblies set up on the frame, and two display module assemblies correspond two eyes settings of user respectively to make when the user wears this wearable display device, two display module assemblies can throw the vision picture to two eyes of user respectively. When the display module is specifically arranged, the display module comprises a display screen, free-form surface lenses and an adjusting mechanism, wherein the display screen is assembled on the frame in a sliding mode along a first direction and can be used for outputting visual pictures, and the first direction is the arrangement direction of the free-form surface lenses of the two display modules; the free-form surface lens at least comprises a first optical surface, the first optical surface is arranged corresponding to eyes of a user, the free-form surface lens can be used for converging and reflecting image light rays emitted by the display screen and projecting the image light rays to the first optical surface so as to form an effective display area on the first optical surface, and the effective display area is an area of an exit pupil area in the projection of the first optical surface, so that when the user wears the head-mounted display equipment, the pupil of the user is in the exit pupil area, and the projection projected to the effective display area can be clearly observed; the adjusting mechanism is connected with the display screen and used for driving the display screen to slide along the first direction, so that the position of the effective display area on the first optical surface is adjusted, and the position of the effective display area can be matched with the position of the pupil of the user all the time.
Use the head mounted display device that this application embodiment provided, when the position of user's pupil changes, the position of effective display area on can adjusting first optical surface through the position of adjustment display screen makes the user can clearly observe the projection of effective display area all the time, and the regulation mode is comparatively simple convenient.
In a specific embodiment, the display module further includes a detection device, and the detection device can be used to detect the pupil position information of the user; the head-mounted display device may further include a processor, and the processor may be connected to the detection device and the adjustment mechanism, respectively, and configured to acquire position information of the user's pupil, determine a target position of the effective display area on the first optical surface according to the position information of the user's pupil, and then control the adjustment mechanism to adjust the position of the display screen according to the target position of the effective display area, so as to adjust the effective display area to its target position, so as to ensure that a clear picture can be observed even if the position of the user's pupil changes.
In a specific embodiment, the processor may be further configured to determine a displacement of the pupil of the user according to the position information of the pupil of the user, and when the displacement value of the pupil of the user is greater than a set threshold, perform the step of determining the target position effectively displayed on the first optical surface; and when the displacement value of the pupil of the user is not larger than the set threshold, the adjusting mechanism is controlled not to act.
Specifically, the displacement of the user pupil is determined according to the position information of the user pupil, and the specific determination method may be that the currently acquired position information of the user pupil is compared with the last acquired position information of the user pupil to determine a moving direction and a moving distance of the user pupil, where the moving direction and the moving distance are the displacement of the user pupil.
In order to accurately adjust the effective display area on the first optical surface to its target position, the processor is specifically configured to determine a target position of the display screen based on the target position of the effective display area on the first optical surface, and then control the adjustment mechanism to adjust the display screen to its target position.
Specifically, in determining the target position of the display screen, the processor may be configured to obtain a mapping relationship between the position of the effective display area on the first optical surface and the position of the display screen, and then determine the target position of the display screen according to the mapping relationship and the target position of the effective display area.
In a particular embodiment, the detection device may be an eye tracker. In particular, when the head-mounted display device is worn by a user, the number of the eye trackers may be two in order to more accurately track the positions of the pupils of the user, and the two eye trackers may be configured to be respectively positioned in front of the left and right of the eyes of the user.
The adjusting mechanism can adopt various driving modes, such as electromagnetic driving or electric driving.
In a specific embodiment, the adjusting mechanism is an electromagnetic driving mechanism, and includes an electromagnetic element and a magnetic element, wherein the electromagnetic element is disposed on the frame, and the magnetic element is fixed on the display screen.
In another specific embodiment, the adjusting mechanism is an electric driving mechanism, and comprises a driving element and a lead screw, wherein the lead screw of the lead screw is in transmission connection with the driving element, and a nut of the lead screw is fixedly connected with the display screen, so that the rotary motion output by the driving element can be converted into linear motion capable of driving the display screen to move.
In a specific embodiment, the first optical surface may further be coated with a semi-reflective and semi-transparent film, so that the first optical surface reflects light emitted from the display screen into eyes of a user and simultaneously transmits external ambient light to the eyes of the user, thereby fusing a virtual image and a real environment together to achieve an augmented reality display effect.
Drawings
Fig. 1 is a schematic structural diagram of a head-mounted display device according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a display module according to an embodiment of the present application;
FIG. 3 is a schematic structural diagram of an adjustment mechanism according to an embodiment of the present application;
FIG. 4 is a schematic view of the position of the detecting device according to the embodiment of the present application;
FIG. 5 is a schematic structural diagram of a display module according to another embodiment of the present application;
FIG. 6 is a schematic diagram of an exit pupil area of a display module according to an embodiment of the present disclosure;
FIG. 7 is a schematic diagram illustrating the relationship between the position change of the pupil of the user and the change of the effective display area;
FIG. 8 is an adjustment schematic diagram of the head mounted display device when the position of the user's pupil changes with the rule shown in FIG. 7;
FIG. 9 is a schematic diagram illustrating the relationship between the position change of the pupil of the user and the change of the effective display area;
FIG. 10 is an adjustment schematic diagram of the head mounted display device when the position of the user's pupil changes with the rule shown in FIG. 9;
FIG. 11 is a schematic diagram illustrating the relationship between the position change of the pupil of the user and the change of the effective display area;
FIG. 12 is an adjustment schematic diagram of the head mounted display device when the position of the user's pupil changes at the regular rate shown in FIG. 11;
FIG. 13 is a schematic diagram illustrating the relationship between the position change of the pupil of the user and the change of the effective display area;
fig. 14 is an adjustment schematic diagram of the head-mounted display device when the positions of the pupils of the user are changed at the regular intervals shown in fig. 13.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail with reference to the accompanying drawings.
For the convenience of understanding the head-mounted display device provided in the embodiments of the present application, an application scenario thereof is first described below. The head-mounted display device provided by the embodiment of the application can be an AR (augmented reality) head-mounted display device, wherein AR is a technology for increasing the perception of a user to the real world through information provided by a computer system, virtual information is applied to the real world, and a virtual object and a scene generated by a computer are superposed to a real scene, so that the reality is enhanced. The head-mounted display device generally includes a display module disposed corresponding to human eyes, and when the user wears the head-mounted display device, the display module may be at least partially fixed in front of the eyes of the user, so that the display module can reflect the projection of the visual picture to the eyes of the user. In order to enable a user to observe a clear and correct image, the pupil of the user needs to fall within the exit pupil area of the display module, and for some display modules with relatively small exit pupil areas, when the interpupillary distance of the user changes, the pupil of the user may deviate from the exit pupil area, so that the user cannot receive a correct image. In order to solve the problem, a scheme of the prior art is to adjust the position of the exit pupil area by adjusting the position of the whole display module, so that the head-mounted display device can adapt to the wearing requirements of user groups with different interpupillary distances, but the structure of the head-mounted display device is complex due to the scheme, the implementation difficulty and the cost are relatively high, and based on this, the embodiment of the application provides the head-mounted display device. The following detailed description is made with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, fig. 1 shows a schematic structural diagram of a head mounted display device according to an embodiment of the present application. The head-mounted display device provided in the embodiment of the application may include a frame 10 and a display module 20, where the frame 10 may specifically be a wearable head-mounted frame, such as a helmet, an eyeglass frame, or a headband, and the application is not limited thereto; display module assembly 20 sets up on the frame, and during concrete setting, display module assembly 20 is two, and two display module assembly 20 correspond two eyes settings of user respectively to make when the user wears this wearable display device, two display module assembly 20 can reflect the projection of vision picture to two eyes of user respectively.
Referring to fig. 2, fig. 2 is a schematic partial structure diagram of a display module 20 according to an embodiment of the present disclosure. The display module 20 may include a display screen 21 and a free-form surface lens 22, where the display screen 21 may be configured to receive a display signal from the outside and output the display signal from a light emitting surface thereof in the form of a visual image, and specifically, the visual image may be a static image including contents such as a photograph, a picture or a static image, or may be a dynamic image including contents such as a video or a changing image. In the embodiment of the present application, the display screen 21 may specifically be a micro display screen with a small volume, which is helpful for controlling the overall size of the head-mounted display device and improving the wearing comfort of the head-mounted display device.
It should be noted that the visual images displayed by the display screens 21 of the two display modules 20 may be the same or different, and when the visual images displayed by the two display screens 21 are completely the same or different, or only one of the display screens 21 displays a visual image, the head-mounted display device may present a 2D display effect; when the pictures displayed by the two display screens 21 are slightly different, the head-mounted display device can present a 3D display effect.
In the embodiment of the present application, the free-form surface lens 22 is specifically used for reflecting the projection of the visual picture of the display screen 21 to the eyes of the user. When the head-mounted display device is specifically arranged, the free-form surface lens 22 may at least include a first optical surface 23 corresponding to the eyes of the user, the free-form surface lens 22 may converge and reflect the image light emitted from the display screen 21, and finally project the image light onto the first optical surface 23, and an effective display area 24 is formed on the first optical surface 23, where the effective display area 24 is an area coinciding with the projection of the exit pupil area on the first optical surface 23, or an area within the projection of the exit pupil area on the first optical surface 23, so that when the head-mounted display device is worn by the user, the projection projected onto the effective display area 24 can be clearly observed by the pupil of the user within the exit pupil area.
In the above embodiment, the first optical surface 23 may further be plated with a semi-reflective and semi-transparent film, so that the first optical surface 23 can reflect light emitted from the display screen into eyes of a user and simultaneously transmit external ambient light to the eyes of the user, thereby fusing a virtual image and a real environment together to achieve an augmented reality display effect.
It is understood that the free-form surface lens 22 may further include a second optical surface 25 disposed corresponding to the light-emitting surface of the display screen 21, and at least one intermediate reflective optical surface (not shown), wherein the second optical surface 25 is configured to receive the image light emitted from the display screen 21, magnify the projection of the image light on the second optical surface 25, reflect the magnified projection light to the intermediate reflective optical surface, and project the magnified projection light to the first optical surface 23 after being reflected by one or more intermediate reflective optical surfaces.
In order to adapt the head-mounted display device to the use requirements of user groups with different interpupillary distances, in the embodiment of the present application, the position of the effective display area 24 formed on the first optical surface 23 can be adjusted according to the position of the user's pupil, so that the user can always clearly observe the projection in the effective display area 24. The position of the effective display area 24 may be specifically determined by the position of the display screen 21 and the structure of the free-form surface lens 22, and when the structure of the free-form surface lens 22 is determined in the design stage, the position of the effective display area may be adjusted by adjusting the position of the display screen 21.
During specific setting, the display screen 21 is assembled on the frame in a sliding manner along a first direction (i.e., the x direction), which is specifically the arrangement direction of the free-form surface lenses 22 of the two display modules 20, or can be understood as a direction parallel to the line connecting the two eyes of the user after the user wears the head-mounted display device. Accordingly, a guide rail extending in the first direction may be provided on the frame, so that the display screen 21 can be slidably mounted on the guide rail, thereby improving stability when the display screen 21 moves. When the display screen 21 slides along the first direction, the effective display area 24 also translates on the first optical surface 23, so that the position of the effective display area 24 can always match the position of the pupil of the user by adjusting the position of the display screen 21, where matching means that the effective display area 24 can fall within the projection of the exit pupil area on the first optical surface 23.
Referring to fig. 3, in an embodiment of the present application, the display module may further include an adjusting mechanism 26, where the adjusting mechanism 26 is connected to the display screen 21 and is used for driving the display screen 21 to slide along a first direction, so as to adjust the position of the effective display area 24 on the first optical surface.
The adjusting mechanism can adopt various driving modes, such as electromagnetic driving or electric driving, and when the electromagnetic driving is adopted, an electromagnetic element, such as an electromagnet, can be arranged on the frame, and a magnetic element, such as a magnet, can be arranged on the display screen, so that the electromagnetic element can generate repulsive force or attractive force on the magnetic element by applying currents in different directions to the electromagnetic element, and the magnetic element drives the display screen to move; when the electric drive is adopted, the adjusting mechanism may specifically include a driving element and a transmission member, wherein the transmission member is configured to transmit the driving force of the driving element to the display screen to drive the display screen to move.
In the above embodiment, the transmission component may be a lead screw, and the lead screw includes a lead screw 261 and a nut 262 assembled on the lead screw 261, where the lead screw 261 is connected to an output end of the driving element, and the nut 262 is fixedly connected to the display screen 21, so that the rotational motion output by the driving element can be converted into a linear motion capable of driving the display screen 21 to move.
In other embodiments of the present application, the transmission component may further include a gear and a rack that are engaged with each other, wherein the gear is connected to the output end of the driving element, and the rack is fixedly connected to the display screen.
Referring to fig. 4, in the embodiment of the present application, the display module may further include a detection device 27 for detecting the position information of the pupil of the user, and the detection device 27 may specifically be an eye tracker, and when the detection device is specifically configured, the number of the eye trackers may be two, and when the user wears the head-mounted display device, the two eye trackers may be respectively located at the front left and the front right of the eye to more accurately track the position of the pupil of the user.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a head-mounted display device according to an embodiment of the present application. The head-mounted display device further comprises a processor 30, wherein the processor 30 is respectively connected to the detecting device 27 and the adjusting mechanism 26, and is configured to obtain the position information of the user's pupil, determine the target position of the effective display area 24 on the first optical surface 23 according to the position information of the user's pupil, and then control the adjusting mechanism 26 to adjust the position of the display screen 21 according to the target position of the effective display area 24. In this embodiment, through the position information of the user's pupil, the projection of the exit pupil area on the first optical surface 23, which is the target position of the effective display area 24, may be determined, and then the position of the display screen 21 is adjusted according to the determined target position of the effective display area 24, so as to adjust the effective display area 24 to the target position.
It should be noted that in order to ensure that the user can observe the complete projection picture, the effective display area 24 or the target position of the effective display area 24 should always be within the area of the first optical surface 23, that is, in the embodiment of the present application, the adjustable area of the effective display area 24 is within the area of the first optical surface.
In the embodiment, the processor can acquire the position information of the pupils of the user in real time so as to adjust the position of the effective display area in time; or, the time interval t for acquiring information can be determined according to the motion frequency of human eyes, and then the position information of the pupils of the user is acquired every time t; still alternatively, a corresponding control button may be set on the head-mounted display device, and the control button is connected to the processor, and when the user initially wears the head-mounted display device, or after each rotation of the user's eyes, an instruction may be issued to the processor by pressing the control button, so that the processor acquires the position information of the user's pupils.
In this embodiment of the application, the processor may be further configured to determine the displacement of the user pupil according to the position information of the user pupil, and the specific determination method may be that the position information acquired this time is compared with the position information acquired last time, so that the moving direction and the moving distance of the user pupil may be determined, where the moving direction and the moving distance are the displacement information of the user pupil. After determining the displacement of the pupil of the user, judging the magnitude of the displacement value, and when the displacement value is larger than a set threshold value, executing the step of determining the target position of the effective display area on the first optical surface; and when the displacement value is not larger than the set threshold value, the regulating mechanism is controlled not to act.
Generally, referring to fig. 6, for a head-mounted display device applying a free-form surface lens, the size of a rectangular area 41 at one end of an exit pupil area 40 at the bottom of a human eye is about 8mm × 8mm, while the diameter of a human pupil is about 4mm, when the displacement of the user's pupil is relatively small, the moved pupil may still be in the exit pupil area 40 before moving, and then the user can still clearly observe the projection in the effective display area without adjusting the position of the effective display area; when the displacement of the pupil of the user is relatively large, the moved pupil may deviate from the exit pupil area 40 before the movement, and at this time, the target position of the effective display area needs to be determined according to the moved pupil position information, so as to adjust the position of the effective display area.
The specific value of the set threshold may be determined according to related parameters of the head-mounted display device, which is not limited in this application, and in an optional embodiment, the set threshold may be set to a value between 1 mm and 2mm, for example, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, and the like.
In order to precisely adjust the effective display area on the first optical surface to its target position, in an embodiment of the present application, the processor is specifically configured to: and determining the target position of the display screen according to the target position of the effective display area on the first optical surface, and then controlling the adjusting mechanism to adjust the display screen to the target position of the display screen. Specifically, in determining the target position of the display screen, the processor may be configured to obtain a mapping relationship between the position of the effective display area on the first optical surface and the position of the display screen, and then determine the target position of the display screen according to the mapping relationship and the target position of the effective display area.
The mapping relationship between the position of the effective display area on the first optical surface and the position of the display screen can be a functional relationship pre-stored in the processor or a mapping relationship based on a database, and the position of the display screen corresponding to the target position of the effective display area can be accurately and quickly determined according to the mapping relationship. The mapping relationship may be determined according to experimental data, or may be calculated according to the structure of the free-form surface lens and the propagation path of the light ray in the free-form surface lens, which is not described herein again.
The following describes in detail the working process of the head-mounted display device provided in the embodiments of the present application in several different scenarios. For convenience of description, the two display modules are respectively referred to as a first display module and a second display module, wherein the first display module is disposed corresponding to a left eye of a user, and the second display module is disposed corresponding to a right eye of the user.
Referring to fig. 7 and 8, fig. 7 is a schematic diagram illustrating a relationship between a change in the position of a pupil of a user and a change in an effective display area, and fig. 8 is a schematic diagram illustrating an adjustment principle of the head-mounted display device when the position of the pupil of the user changes according to the rule shown in fig. 7. In this embodiment, the interpupillary distance of the user is smaller than the applicable interpupillary distance of the head-mounted display device in the initial state, and therefore, the effective display area 24 of the first display module 221 needs to move to the right side, and the effective display area 24 of the second display module 222 needs to move to the left side. In specific implementation, the processor may determine the target position of the effective display area 24 of the first display module 221 according to the position information of the left pupil of the user, further determine the target position of the display screen 21 of the first display module 221, and control the adjusting mechanism of the first display module 221 to drive the display screen 21 to move to the target position towards the right side; and the processor determines the target position of the effective display area 24 of the second display module 222 according to the position information of the right pupil of the user, further determines the target position of the display screen 21 of the second display module 222, and controls the adjusting mechanism of the second display module 222 to drive the display screen 21 to move to the target position towards the left side. Through the adjusting process, the distance between the effective display areas 24 of the two display modules can be reduced, and the head-mounted display equipment can adapt to the use requirements of the current user.
It can be understood that, in the process of using the head-mounted display device by the user, according to the change of the display content of the display screen, the convergence of the user may change, and when the convergence of the user becomes smaller, the interpupillary distance also becomes smaller, and at this time, the adjustment principle of the head-mounted display device is similar to that of the embodiment shown in fig. 7, and is not repeated here.
Referring to fig. 9 and 10, fig. 9 is a schematic diagram illustrating a relationship between a change in the position of a pupil of a user and a change in an effective display area, and fig. 10 is a schematic diagram illustrating an adjustment principle of the head-mounted display device when the position of the pupil of the user changes according to the rule shown in fig. 9. In this embodiment, the interpupillary distance of the user is greater than the applicable interpupillary distance of the head-mounted display device in the initial state, and therefore, the effective display area 24 of the first display module 221 needs to move to the left side, and the effective display area 24 of the second display module 222 needs to move to the right side. In specific implementation, the processor may determine the target position 28 of the effective display area of the first display module 221 according to the position information of the left pupil of the user, further determine the target position of the display screen 21 of the first display module 221, and control the adjusting mechanism of the first display module 221 to drive the display screen 21 to move to the left side to the target position; and the processor determines the target position of the effective display area 24 of the second display module 222 according to the position information of the right pupil of the user, further determines the target position of the display screen 21 of the second display module 222, and controls the adjusting mechanism of the second display module 222 to drive the display screen 21 to move to the target position towards the right side. Through above adjustment process, can make the distance increase between two display module assembly's effective display area 24, make head mounted display device can adapt to current user's user demand.
It can be understood that, in the process of using the head-mounted display device by the user, when the convergence of the user becomes larger, the interpupillary distance also becomes larger, and at this time, the adjustment principle of the head-mounted display device is similar to the embodiment shown in fig. 8, and is not repeated here.
Referring to fig. 11 and 12, fig. 11 is a schematic diagram illustrating a relationship between a change in the position of a pupil of a user and a change in an effective display area, and fig. 12 is a schematic diagram illustrating an adjustment principle of the head-mounted display device when the position of the pupil of the user changes according to the rule shown in fig. 11. In the process that the user used this head mounted display device, according to the change of the display content of display screen, user's eyes can take place to rotate, and when user's eyes rotated to the left side, both sides pupil moved to the left simultaneously, consequently, the effective display area 24 of first display module assembly 221 need move to the left side, and the effective display area 24 of second display module assembly 222 also need move to the left side. For a specific adjustment process, reference may be made to the description in the above embodiments, which is not repeated herein. Effective display area 24 that can make two display module assemblies moves to the left in the lump through adjusting, and user demand when making head mounted display device can adapt to the coaxial left shift of user's both eyes.
Referring to fig. 13 and 14, fig. 13 is a schematic diagram illustrating a relationship between a change in the position of the pupil of the user and a change in the effective display area, and fig. 14 is a schematic diagram illustrating an adjustment principle of the head-mounted display device when the position of the pupil of the user changes according to the rule shown in fig. 13. In the process of using the head-mounted display device by the user, according to the change of the display content of the display screen, when the eyes of the user rotate to the right side, the pupils at the two sides move to the right at the same time, so the effective display area 24 of the first display module 221 needs to move to the right side, and the effective display area 24 of the second display module 222 also needs to move to the right side. For a specific adjustment process, reference may be made to the description in the above embodiments, which is not repeated herein. Can make two display module assembly's effective display area 24 move to the right side in the lump through adjusting, make wear-type display device can adapt to the user demand when user's eyes are coaxial to move to the right.
It is thus clear that the head mounted display equipment that this application embodiment provided not only can be applicable to the user demand that has the user group of different interpupillary distances, and to same user, also can carry out real-time dynamic detection to user's both sides pupil position in this user's use to the user demand when adapting to the convergence change of user's eyes and the coaxial rotation of eyes makes the user observe clear picture throughout in whole use.
To sum up, use the head mounted display device that this application embodiment provided, when the position of user's pupil changes, the position of effective display area on can adjusting first optical surface through the position of adjustment display screen makes the user can observe the projection of effective display area clearly all the time, and the regulation mode is comparatively simple convenient.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a head-mounted display device, its characterized in that, including the frame and set up in two display module assembly of frame, two display module assembly corresponds two eyes settings of user respectively, every display module assembly includes display screen, free-form surface lens and adjustment mechanism, wherein:
the display screen is assembled on the frame in a sliding mode along a first direction;
the free-form surface lens at least comprises a first optical surface arranged corresponding to eyes of a user, and the free-form surface lens is used for guiding and projecting light rays emitted by the display screen to the first optical surface so as to form an effective display area on the first optical surface;
the adjusting mechanism is connected with the display screen and used for driving the display screen to slide so as to adjust the position of the effective display area on the first optical surface;
the first direction is the arrangement direction of the free-form surface lenses of the two display modules.
2. The head-mounted display device of claim 1, wherein the display module further comprises a detection device for detecting position information of a pupil of the user;
the head-mounted display equipment further comprises a processor, wherein the processor is respectively connected with the detection device and the adjusting mechanism and is used for acquiring the position information of the pupils of the user; determining a target position of an effective display area on the first optical surface according to the position information of the pupil of the user; and controlling the adjusting mechanism to adjust the position of the display screen according to the target position of the effective display area on the first optical surface.
3. The head-mounted display device of claim 2, wherein the processor is further to:
determining the displacement of the user pupil according to the position information of the user pupil;
and when the displacement of the pupil of the user is larger than a set threshold value, executing the step of determining the target position of the effective display area on the first optical surface.
4. The head-mounted display device of claim 3, wherein the processor is further to:
and when the displacement of the pupil of the user is not larger than the set threshold, controlling the adjusting mechanism not to act.
5. The head-mounted display device of claim 2, wherein the processor is specifically to:
and determining the target position of the display screen according to the target position of the effective display area on the first optical surface, and controlling the adjusting mechanism to adjust the display screen to the target position of the display screen.
6. The head-mounted display device of claim 5, wherein the processor is specifically to:
acquiring a mapping relation between the position of an effective display area on the first optical surface and the position of the display screen;
and determining the target position of the display screen according to the mapping relation and the target position of the effective display area on the first optical surface.
7. A head-mounted display device as claimed in any one of claims 2 to 6, wherein the detection means is an eye tracker.
8. The head-mounted display device of claim 7, wherein each display module comprises at least one eye tracker.
9. The head-mounted display device of any one of claims 1-8, wherein the adjustment mechanism comprises a driving element and a lead screw, wherein the lead screw of the lead screw is in transmission connection with the driving element, and a nut of the lead screw is fixedly connected with the display screen.
10. A head-mounted display device as recited in any of claims 1-9, wherein the first optical surface is coated with a transflective film.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911063134.7A CN110879469A (en) | 2019-10-31 | 2019-10-31 | Head-mounted display equipment |
| PCT/CN2020/116223 WO2021082798A1 (en) | 2019-10-31 | 2020-09-18 | Head-mounted display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911063134.7A CN110879469A (en) | 2019-10-31 | 2019-10-31 | Head-mounted display equipment |
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| CN110879469A true CN110879469A (en) | 2020-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911063134.7A Pending CN110879469A (en) | 2019-10-31 | 2019-10-31 | Head-mounted display equipment |
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| WO (1) | WO2021082798A1 (en) |
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Application publication date: 20200313 |