A head-mounted display device

Abstract

The embodiment of the present application discloses a head-mounted display device, including: a display device body, which is used to display first image information to a wearer and generate second image information based on the first image information; and a first projection component, which is located in the display device body and electrically connected to the display device body to obtain second image information, and the first projection component is configured to project the second image information to the side of the display device body away from the wearer when the display device body displays the first image information to the wearer. The head-mounted display device of the embodiment of the present application is provided with a first projection component that can project image information to the side of the display device body away from the wearer, so that other people in the wearer's environment can see the image information and make judgments based on the image information, thereby understanding the wearer's behavior and actions and being able to actively avoid the wearer to avoid collision.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a head-mounted display device. Background Art

[0002] With the continuous development of science and technology, head-mounted display devices have gradually entered people's lives. The head-mounted display device can have an independent operating system, can install programs, and complete functions such as schedule reminders, navigation, taking pictures, and video calls by receiving user operation instructions. In addition, the head-mounted display device can also realize near-eye display scenarios such as augmented reality, virtual reality, and mixed reality, and the application prospects are relatively broad. However, in the related art, the image information of the head-mounted display device can only be displayed to the wearer, but not to others. If the wearer is too immersed in the displayed scene and certain behaviors occur when using the head-mounted display device, other people in the wearer's environment may think that the wearer's behavior is weird, which may cause misunderstandings to the wearer. At the same time, the wearer may collide with other people if he is too immersed in the displayed scene. Summary of the invention

[0003] The embodiment of the present application provides a head-mounted display device that can project image information to the side of the display device body away from the wearer, so that other people in the wearer's environment can see the image information projected by the display device body and make judgments based on the image information, thereby understanding the wearer's behavior and actively avoiding the wearer to avoid collision. The technical solution is as follows;

[0004] The present application provides a head mounted display device, comprising:

[0005] A display device body, used to display first image information to the wearer and generate second image information based on the first image information; and

[0006] The first projection component is located in the display device body and electrically connected to the display device body to obtain second image information. The first projection component is configured to project the second image information to the side of the display device body away from the wearer when the display device body displays the first image information to the wearer.

[0007] The beneficial effect of the embodiment of the present application is that the head-mounted display device of the embodiment of the present application is added with a first projection component that can project image information to the side of the display device body away from the wearer, so that other people in the wearer's environment can see the image information and make judgments based on the image information, thereby understanding the wearer's behavior and actions and being able to actively avoid the wearer to avoid collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] To more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0009] Figure 1 It is a schematic structural diagram of a head-mounted display device provided by an embodiment of the present application;

[0010] Figure 2 It is a schematic structural diagram of a first projection component in the head-mounted display device provided by an embodiment of the present application;

[0011] Figure 3 It is another schematic structural diagram of the first projection component in the head-mounted display device provided by an embodiment of the present application;

[0012] Figure 4 It is yet another schematic structural diagram of the first projection component in the head-mounted display device provided by an embodiment of the present application;

[0013] Figure 5 It is still another schematic structural diagram of the first projection component in the head-mounted display device provided by an embodiment of the present application;

[0014] Figure 6 It is another schematic structural diagram of the head-mounted display device provided by an embodiment of the present application;

[0015] Figure 7 It is a schematic structural diagram of the first projection component, the first telescopic component, and the first rotating component in the head-mounted display device provided by an embodiment of the present application;

[0016] Figure 8 It is a schematic diagram of a state of a first rotating component in the head-mounted display device provided by an embodiment of the present application;

[0017] Figure 9 It is another schematic diagram of a state of a first rotating component in the head-mounted display device provided by an embodiment of the present application;

[0018] Figure 10 It is a schematic diagram of a state of another first rotating component in the head-mounted display device provided by an embodiment of the present application;

[0019] Figure 11 It is another schematic diagram of a state of another first rotating component in the head-mounted display device provided by an embodiment of the present application. Detailed implementation manners

[0020] In order to make the objectives, technical solutions and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0021] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0022] See also Figure 1 The embodiment of the present application provides a head mounted display device 100. The head mounted display device 100 may include a display device body 110 and a first projection assembly 120.

[0023] In the related art, the image information of the head-mounted display device 100 can only be displayed to the wearer, but cannot be displayed to others. If the wearer is too immersed in the displayed scene and performs certain behaviors when using the head-mounted display device 100, other people in the wearer's environment may think that the wearer's behavior is strange, which causes trouble to the wearer. At the same time, the wearer may collide with other people if he is too immersed in the displayed scene. To solve the above problems, the head-mounted display device 100 of the embodiment of the present application is provided with a first projection component 120 that can project image information to the side of the display device body 110 away from the wearer. The side of the display device body 110 away from the wearer can be any area other than the inner surface of the display device body 110. Among them, the inner surface of the display device body 110 is the surface of the display device body 110 facing the wearer when worn. Specifically, the side of the display device body 110 away from the wearer can be the outer surface of the display device body 110, or it can be the external environment where the wearer is located. The image information can include images and / or videos.

[0024] In order to distinguish the image information displayed by the display device body 110 and the image information projected by the first projection assembly 120, the image information displayed by the display device body 110 can be defined as the first image information, and the image information projected by the first projection assembly 120 can be defined as the second image information. That is, the display device body 110 is used to display the first image information to the wearer; the first projection assembly 120 is used to project the second image information to the side of the display device body 110 away from the wearer.

[0025] The first image information can be displayed on the display device body 110 by projection for the wearer to view. Specifically, the first image information can be displayed on the side of the display device body 110 facing the wearer. When the first image information is displayed on the side of the display device body 110 facing the wearer by projection, the head-mounted display device 100 can originally include a second projection component for projecting the first image information onto the display device body 110. To simplify the structure of the head-mounted display device 100 and reduce costs, the first projection component 120 can be obtained by improving the second projection component.

[0026] The improvement to the second projection component can include: adding a second rotation component between the second projection component and the display device body 110, and the second rotation component is configured to enable the second projection component to rotate relative to the display device body 110 so that the second projection component can switch between a third projection state and a fourth projection state. Among them, in the third projection state, the second projection component projects the first image information onto the side of the display device body 110 facing the wearer, and in the fourth projection state, the second projection component projects the second image information onto the side of the display device body 110 facing away from the wearer. That is, at this time, the first projection component 120 includes the second projection component and the second rotation component.

[0027] The improvement to the second projection component can also include: adding a second telescopic component between the second projection component and the display device body 110, and the second telescopic component is configured to enable the second projection component to move relative to the display device body 110 along a second direction. The second direction is to switch the second projection component from the side of the display device body 110 facing the wearer to the side of the display device body 110 facing away from the wearer. That is, at this time, the first projection component 120 includes the second projection component and the second telescopic component.

[0028] After adding the second rotation component or the second telescopic component between the second projection component and the display device body 110 as described above, both the first image information and the second image information need to be projected by the second projection component. In this way, the projection of the first projection information and the second projection information cannot be carried out together, and the projection of the second image information needs to be completed before and / or during the projection of the first image information. However, when the projection of the second image information is completed before the projection of the first image information, due to the fact that other people in the environment where the wearer is located may change at any time, the prompting effect on other people will be relatively weak. When the projection of the second image information is completed during the projection of the first image information, it will also make the projection of the first image information intermittent, which will reduce the wearer's experience. To solve the above problems, the first projection component 120 can also be a projection component newly added directly to the head-mounted display device in the related art, so that both the first projection component 120 and the second projection component can work independently.

[0029] When the first projection assembly 120 is the one including the second projection assembly and the second rotating assembly, or the one including the second projection assembly and the second telescopic assembly as described above, the display device body 110 in the embodiment of the present application can be understood as the part of the head-mounted display device of the related art after the second projection assembly is removed. When the first projection assembly 120 is a projection assembly newly added to the head-mounted display device of the related art as described above, in order to facilitate the distinction between the head-mounted display device of the embodiment of the present application that can project the second image information to the side of the display device body away from the wearer and the head-mounted display device of the related art, the head-mounted display device of the related art can be defined as the display device body 110.

[0030] The head mounted display device 100 may be any device capable of displaying image information to a wearer, for example, the head mounted display device 100 may be VR glasses, AR glasses, MR glasses, etc.

[0031] The second image information may be image information generated by the display device body 110 according to the first image information. The first projection assembly 120 is located at the display device body 110 and is electrically connected to the display device body 110 to obtain the second image information generated by the display device body 110. The first projection assembly 120 is configured to project the second image information to a side of the display device body 110 away from the wearer when the display device body 110 displays the first image information to the wearer.

[0032] The second image information may be different from the first image information. When the second image information is different from the first image information, the second image information may be pre-stored image information of the display device body 110. In order to facilitate the second image information to have a prompt effect on others, the pre-stored image information may be information with a prompt effect. Specifically, the pre-stored image information may be information containing a reminder text and / or information containing a reminder screen.

[0033] Both the first image information and the pre-stored image information may include multiple types, and there may be a corresponding relationship between the first image information and the pre-stored image information, so that when the display device body 110 displays the first image information to the wearer, the pre-stored image information corresponding to the first image information can be used as the second image information. The corresponding relationship between the first image information and the pre-stored image information can be a system default or set in advance by the wearer. Of course, there may be no corresponding relationship between the first image information and the pre-stored image information, so that when the display device body 110 displays the first image information to the wearer, a pre-stored image information can be randomly selected as the second image information.

[0034] For others to know the feelings of the wearer, the second image information generated by the display device body 110 can also be the same as the first image information. The second image information being the same as the first image information can be: the information source of the second image information is the same as that of the first image information, but the display time axes are not synchronized. The second image information being the same as the first image information can also be: the information source of the second image information is the same as the information source of the first image information, and the display time axes are synchronized. Here, the information source of the first image information can be the image information pre-stored in the display device body 110 for display to the wearer.

[0035] When the head-mounted display device 100 is an AR glasses, the AR glasses mainly superimpose virtual elements on the external environment, enabling the wearer to see both virtual elements and the external real environment. The working principle of the AR glasses can be: when the display panel 111 for displaying the first image information in the AR glasses is made of a light-transmitting material, the first image information on the display panel 111 can only be virtual elements, and the external environment is directly viewed by the wearer through the display panel 111. That is, when the display panel 111 of the AR glasses is made of a light-transmitting material, the first image information only includes virtual elements. In this way, even if the second image information is the same as the first image information, others can only perceive the virtual elements felt by the wearer, and cannot reasonably combine the virtual elements with the external environment to fully perceive the wearer's feelings. To enable others to have an immersive feeling, when the display panel 111 of the AR glasses is made of a light-transmitting material, the AR glasses can also include a second environmental vision unit for acquiring three-dimensional information of the external environment. The AR glasses combine the three-dimensional information of the external environment acquired by the second environmental vision unit with the virtual elements to generate second image information projected to the side of the display device body 110 away from the wearer. At this time, the second image information is the same as the image information seen by the wearer. When the head-mounted display device 100 is an MR glasses, its working principle is similar to that of the AR glasses, so the same processing method can be adopted to make the second image information the same as the image information seen by the wearer, which will not be elaborated here.

[0036] The second environmental vision unit can include a depth camera capable of acquiring the phase and amplitude information of an image, so that the second environmental vision unit can generate three-dimensional information corresponding to the external environment.

[0037] Of course, to make the projection of the head-mounted display device 100 more diversified, the head-mounted display device 100 may further include a mode conversion component, so that the first projection component 120 can be switched between multiple projection modes. Here, taking the case where the first projection component 120 is switched between two projection modes as an example for detailed description, the mode conversion component is used to enable the first projection component 120 to be switched between a first projection mode and a second projection mode; wherein, in the first projection mode, the second image information is the same as the first image information, and in the second projection mode, the second image information is different from the first image information.

[0038] The first projection component 120 can project the second image information to the side of the display device body 110 away from the wearer in any form. For example, the first projection component 120 can project the second image information to the side of the display device body 110 away from the wearer in a two-dimensional form, or can project the second image information to the side of the display device body 110 away from the wearer in a three-dimensional form.

[0039] When the first projection component 120 projects the second image information to the side of the display device body 110 away from the wearer in a two-dimensional form, see Figure 2 , the first projection component 120 may include a light source 121a, a Fresnel lens 122, a liquid crystal screen 123, a reflector 124, and a projection lens 125a. The liquid crystal screen 123 can be electrically connected to the display device body 110 to obtain the second image information. The working principle of the first projection component 120 may be: first, the light source 121a emits a light beam, and then the light beam is collimated and focused by the Fresnel lens 122 to become a parallel light beam and reach the liquid crystal screen 123, and then the light beam passes through the liquid crystal screen 123 and the reflector 124 and is output by the projection lens 125a.

[0040] When the first projection component 120 projects the second image information to the side of the display device body 110 away from the wearer in a three-dimensional form, the method for the first projection component 120 to perform three-dimensional projection may be chromatic aberration type or shutter type. Among them, the chromatic aberration type uses a red-blue filter film to make the transmitted light different, so that others' left and right eyes can see different diffracted images, so as to achieve three-dimensional projection. The shutter type uses the different times for the left and right eyes to receive images to achieve three-dimensional projection. Of course, in order to enable others to see more natural image information, the method for the first projection component 120 to perform three-dimensional projection may also be polarization type. The following details the structure of the first projection component 120 projecting the second image information by using the polarization type three-dimensional projection method:

[0041] The first projection component 120 is used to output the second image information as a first polarized image and a second polarized image, and project the first polarized image and the second polarized image to the side of the display device body 110 away from the wearer; the polarization state of the first polarized image is perpendicular to the polarization state of the second polarized image.

[0042] When the first projection component 120 projects the second image information through only one projector, refer to Figure 5 , the first projection component 120 may include a light source 121d, a polarization beam splitter 127d, a chipset, and a projection lens 125d. The light source may be an LED light source or a laser source. The working principle of one projector may be as follows: First, the light source 121d emits a light beam, and then the light beam is split into a first sub-beam with a first polarization state and a second sub-beam with a second polarization state after passing through the polarization beam splitter 127d arranged on its transmission path. The chipset is electrically connected to the display device body 110 to obtain the second image information. The chipset includes a first chip 128d1 arranged on the transmission path of the first sub-beam and a second chip 128d2 arranged on the transmission path of the second sub-beam. The first sub-beam with the first polarization state will pass through the polarization beam splitter 127d and reach the first chip 128d1, and the second sub-beam with the second polarization state will be reflected by the splitting surface of the polarization beam splitter 127d and reach the second chip 128d2. The first chip 128d1 will modulate the first sub-beam with the first polarization state into a third sub-beam with a second polarization state and reflect the third sub-beam to the polarization beam splitter 127d. When the third sub-beam with the second polarization state passes through the polarization beam splitter 127d, it will be reflected by the splitting surface and reach the projection lens 125d arranged on its transmission path. The projection lens 125d can project the second polarization image by using the third sub-beam. The second chip 128d2 will modulate the second sub-beam with the second polarization state into a fourth sub-beam with a first polarization state and reflect the fourth sub-beam to the polarization beam splitter 127d. When the fourth sub-beam with the first polarization state passes through the polarization beam splitter 127d, it will directly pass through and reach the projection lens 125d arranged on its transmission path. The projection lens 125d can project the first polarization image by using the fourth sub-beam. The first polarization state is perpendicular to the second polarization state. The light beam with the first polarization state may be P light, and the light beam with the second polarization state may be S light. In the embodiments of the present application, the chipset may be an LCOS (Liquid Crystal on Silicon) chipset, and the first chip and the second chip may be an LCOS chip respectively.

[0043] In this way, the projection lens 125d outputs both the first polarization image and the second polarization image. After others wear the corresponding polarization glasses, one eye can receive the first polarization image, and the other eye can receive the second polarization image. Then, after being superimposed by the brain, a three-dimensional display effect is formed. At the same time, by using the same light source 121d and the same projection lens 125d, the utilization rate of light energy can be improved, and the consistency of the optical path can be ensured, and the projection effect is better.

[0044] In addition, the first projection component 120 can also project the second image information through two projectors. For the convenience of description, in the embodiments of the present application, the two projectors are respectively defined as the first projector and the second projector. That is, the first projection component 120 can include the first projector and the second projector. The first projector is electrically connected to the display device body 110 to obtain the second image information, and when the display device body 110 displays the first image information to the wearer, the second image information is output as a first polarized image. The second projector is electrically connected to the display device body 110 to obtain the second image information, and when the display device body 110 displays the first image information to the wearer, the second image information is output as a second polarized image. The polarization state of the first polarized image is perpendicular to the polarization state of the second polarized image.

[0045] When the first projection component 120 projects the second image information through two projectors, except that the number of chips is the same as that of a single projector, which is two, after setting two projectors, the number of light sources, the number of polarization beam splitters, and the number of projection lenses will also be two, so that each projector includes a light source, a polarization beam splitter, a projection lens, and a chip. When the first projection component 120 projects the second image information through two projectors, each projector is only used to output one type of polarized image. Therefore, a polarizer can be added between the light source and the polarization beam splitter of each projector, so that the light beam has a first polarization state or a second polarization state when it reaches the polarization beam splitter. To enable the two projectors to output the first polarized image and the second polarized image respectively, a polarization converter can be added to one of the projectors.

[0046] Specifically, referring to Figure 3 , the first projector can include a light source 121b, a polarizer 126b, a polarization beam splitter 127b, a chip 128b, and a projection lens 125b. Referring to Figure 4 , the second projector can include a light source 121c, a polarizer 126c, a polarization beam splitter 127c, a chip 128c, a polarization converter 129c, and a projection lens 125c. The light source can be an LED light source or a laser source.

[0047] The working principle of the first projector is as follows: First, the light source 121b emits a light beam. Then, the light beam is converted into a first light beam with a second polarization state after passing through the polarizer 126b arranged on its transmission path. After the first light beam with the second polarization state is reflected by the splitting surface of the polarization beam splitter 127b arranged on its transmission path, it reaches the chip 128b. The chip 128b is electrically connected to the display device body 110 to obtain the second image information. The chip 128b will modulate the first light beam with the second polarization state into a second light beam with a first polarization state, and reflect the second light beam to the polarization beam splitter 127b. When the second light beam with the first polarization state passes through the polarization beam splitter 127b, it will directly pass through and reach the projection lens 125b arranged on its transmission path. The projection lens 125b can project the second light beam to output a first polarized image. The first polarization state is perpendicular to the second polarization state. The light beam with the first polarization state can be P light, and the light beam with the second polarization state can be S light.

[0048] The working principle of the second projector is similar to that of the first projector. The difference is that the second projector is additionally provided with a polarization converter 129c, which can convert the second light beam with the first polarization state emitted by the polarization beam splitter 127c into a third light beam with the second polarization state, so that the projection lens 125c can project using the third light beam and output a second polarized image. The first projector outputs a first polarized image, and the second projector outputs a second polarized image. After others wear the corresponding polarized glasses, one eye can receive the first polarized image, and the other eye can receive the second polarized image. Then, through the superposition of the brain, a three-dimensional display effect can be formed.

[0049] For the above-described three-dimensional projection methods, others can only see the three-dimensional effect after wearing specific glasses. If others directly view with naked eyes without wearing specific glasses, what they see will be a two-dimensional effect. To facilitate others to see the three-dimensional effect with naked eyes, the three-dimensional projection method of the first projection component 120 can also be holographic projection.

[0050] The first projection component 120 can project second image information onto the external environment. When the first projection component 120 projects second image information onto the external environment, to ensure the projection effect, the first projection component 120 can project onto a planar area in the external environment. The planar area can be a whiteboard, a wall surface, a book, etc. To enable the second image information to be accurately projected onto the planar area, the position of the wearer can be restricted so that the position of the wearer satisfies the condition that the second image information projected by the first projection component 120 is within the planar area. Of course, to enhance the wearer's experience and make the usage process more casual and free, in order to enable the second image information to be accurately projected onto the planar area, the head-mounted display device 100 can further include a first environmental vision unit for acquiring three-dimensional information of the external environment. The first environmental vision unit can include a depth camera. The first environmental vision unit can be electrically connected to the first projection component 120 to transmit the acquired three-dimensional information of the external environment to the first projection component 120. The first projection component 120 can further include a processor for extracting the planar area from the three-dimensional information of the external environment. After the processor extracts the planar area from the three-dimensional information, it can adjust the orientation and field of view angle of the projector in the first projection component 120 so that the second image information can be accurately projected onto the planar area.

[0051] To ensure that the second image information can still be accurately projected onto the planar area in the external environment after the wearer changes the position, the first environmental vision unit can acquire the three-dimensional information of the external environment in real time to extract in real time the planar area in the external environment that can be projected. The processor of the first projection component 120 can match the prefabricated coordinate system with the world coordinate system in real time in combination with the three-dimensional information, so as to adjust the orientation and field of view angle of the projector of the first projection component 120 in real time to ensure the smoothness and coherence of the projection of the second image information on different planar areas.

[0052] To ensure the clarity of the second image information, the processor can also adjust the intensity of the projection light according to the distance between the planar area and the head-mounted display device 100.

[0053] When the head-mounted display device 100 is a VR glasses, an AR glasses or an MR glasses, the first environmental vision unit can be a newly added unit on the head-mounted display device 100. Of course, when the AR glasses are the above-mentioned display panel 111 made of a light-transmitting material and the AR glasses include a second environmental vision unit, to simplify the structure of the head-mounted display device 100, the first environmental vision unit and the second environmental vision unit can be the same.

[0054] In addition to the above description, the working principle of the AR glasses can also be as follows: When the display panel 111 for displaying the first image information in the AR glasses is made of a light-impermeable material, in order for the wearer to perceive the external environment, the AR glasses may further include a third environmental vision unit capable of acquiring the three-dimensional information of the external environment in real time. The AR glasses need to combine the three-dimensional information of the external environment acquired by the third environmental vision unit with virtual elements to form the first image information, and display the first image information on the light-impermeable display panel 111. That is, when the display panel 111 of the AR glasses is made of a light-impermeable material, the AR glasses include an environmental vision unit. At this time, to simplify the structure of the head-mounted display device 100, the first environmental vision unit and the third environmental vision unit can be the same one.

[0055] The first projection component 120 can also project the second image information onto the outer surface of the display device body 110. Refer to Figure 1 or Figure 6 The second image information projected by the first projection component 120 onto the outer surface of the display device body 110 can be: The first projection component 120 projects the second image information onto the back surface 1111 of the display panel 111 opposite to the display surface for displaying the first image information. The display panel 111 can be a component of the display device body 110 for displaying the first image information. Specifically, the display panel 111 can be a component of the display device body 110 located directly in front of the wearer's line of sight during use. Hereinafter, the case where the first projection component 120 projects the second image information onto the back surface 1111 of the display panel 111 will be taken as an example for detailed description.

[0056] In order for the first projection component 120 to successfully project the second image information onto the back surface 1111, the first projection component 120 can be located on the side where the back surface 1111 of the display panel 111 is located, and there is a certain interval between it and the back surface 1111.

[0057] When the first projection component 120 is the one including the second projection component and the second rotation component as described above, both the first projection information and the second projection information need to be projected by the second projection component. The second projection component is generally located on the side of the display device body 110 facing the wearer. In order for the second projection component to also be located on the side where the back surface 1111 of the display panel 111 is located, it can be achieved by adding a telescopic component between the second projection component and the display device body 110, and combining with the second rotation component to realize the direction switching of the second projection component from projecting towards the side of the display device body 110 facing the wearer to projecting towards the back surface 1111.

[0058] When the first projection component 120 is the one including the second projection component and the second telescopic component as described above, both the first projection information and the second projection information need to be projected by the second projection component. Generally, the second projection component is located on the side of the display device body 110 facing the wearer. To enable the second projection component to also be located on the side where the back surface 1111 of the display panel 111 is located, it can be achieved by the second telescopic component. Of course, to enable the second projection component to project towards the back surface 1111 after being located on the side where the back surface 1111 of the display panel 111 is located, it can be achieved by adding a rotating component between the second projection component and the display device body 110.

[0059] In summary, when the first projection component 120 is obtained by improving the second projection component, to enable the second projection component to switch from the direction of projecting towards the side of the display device body 110 facing the wearer to the direction of projecting towards the back surface 1111, the improvement to the second projection component can include adding both a rotating component and a telescopic component between the second projection component and the display device body 110.

[0060] For the case where the first projection component 120 is a newly added projection component on the head-mounted display device 100, the structure of the head-mounted display device 100 will be described in detail below with specific embodiments:

[0061] When the first projection component 120 is a newly added projection component on the head-mounted display device 100, the first projection component 120 can be located at the edge of the display panel 111. For example, the first projection component 120 can be located at the temple of the display device body 110. However, since the space at the temple is relatively limited and the space at the nose bridge bracket 112 in the middle of the display panel 111 of the display device body 110 is relatively large, the first projection component 120 can also be located on the side of the nose bridge bracket 112 facing away from the display surface of the display panel 111.

[0062] Since there will be a gap between the first projection component 120 and the back surface 1111, at this time, to achieve the integrity of the head-mounted display device 100, the head-mounted display device 100 can further include a connection component for mounting the first projection component 120 on the display device body 110. The connection component can be a component without a telescopic function. Of course, for the convenience of transporting the head-mounted display device 100, the connection component can be a telescopic component with a telescopic function, so that there is no gap or a small gap between the first projection component 120 and the display device body 110 during the transportation of the head-mounted display device 100, and the gap between the first projection component 120 and the display device body 110 can be enlarged by the telescopic component during use. That is, see Figure 7, the head-mounted display device 100 may include a first telescopic component 150. One end of the first telescopic component 150 is connected to the display device body 110, and the other end is connected to the first projection component 120; the first telescopic component 150 is configured to be able to move the first projection component 120 relative to the display device body 110 along the first direction p; the first direction p is the direction in which the back surface 1111 is away from the display surface. The first projection component 120 and the first telescopic component 150 may be directly connected or indirectly connected.

[0063] Of course, for the convenience of adjusting the distance between the first telescopic component 150 and the display device body 110 back to a smaller state after use, the first telescopic component 150 may also be configured to be able to move the first projection component 120 relative to the display device body 110 in the opposite direction of the first direction p. The first telescopic component 150 may be any component with a telescopic function. For example, the telescopic component may be an electric push rod, a cylinder, a hydraulic cylinder or a scissor telescopic mechanism.

[0064] To make the head-mounted display device 100 more compact when idle, the display device body 110 may also have a mounting groove so that the first telescopic component 150 and the first projection component 120 can be stored in the mounting groove when idle.

[0065] The head-mounted display device 100 can also project the second image information to both the external environment and the back surface 1111. The wearer can switch the first projection component 120 between projecting to the external environment and projecting to the back surface 1111 according to needs. For this purpose, see Figure 7 , the first projection component 120 and the first telescopic component 150 may also be connected through a first rotating component 160. That is, the head-mounted display device 100 may also include a first rotating component 160. The first rotating component 160 is configured to be switchable between a first projection state and a second projection state. Among them, in the first projection state, the first projection component 120 projects the second image information to the back surface 1111, and in the second projection state, the first projection component 120 projects the second image information to the external environment.

[0066] The first projection component 120 has a first part 1211 and a second part 1212 that are spaced apart. See Figure 8 and Figure 9, the first rotating assembly 160 may include a first telescopic rod 161 and a second telescopic rod 162. One end of the first telescopic rod 161 is connected to the first telescopic assembly 150, and the other end is rotatably connected to the first part 1211; the second telescopic rod 162 is parallel to the first telescopic rod 161. One end of the second telescopic rod 162 is connected to the first telescopic assembly 10, and the other end is rotatably connected to the second part 1212. The first telescopic rod 161 and the second telescopic rod 162 are configured to drive the first projection assembly 120 to rotate relative to the first telescopic assembly 150 by changing the relative telescopic length. Specifically, when it is necessary to switch the first projection assembly 120 from projecting to the external environment to projecting to the back surface 1111, the first telescopic rod 161 can be controlled to contract and the second telescopic rod 162 can be controlled to extend.

[0067] The positions of the first part 1211 and the second part 1212 on the first projection assembly 120 can be arbitrary, as long as it is satisfied that the first rotating assembly 160 can be switched between the first projection state and the second projection state. Of course, in order to make the adjustment of the first rotating assembly 160 smoother, the first part 1211 and the second part 1212 are preferably away from the projection lens of the first projection assembly 120, and the first part 1211 and the second part 1212 can be symmetric about the central axis of the projection lens of the first projection assembly 120.

[0068] Of course, when two telescopic rods are used to control the rotation of the first projection assembly 120, the rotation angle range of the first projection assembly 120 is limited. To increase the rotation angle range of the first projection assembly 120, see Figure 10 and Figure 11 , the first rotating assembly 160 may further include a first connecting rod 163, a second connecting rod 164, a third telescopic rod 165 and a fourth telescopic rod 166. One end of the first connecting rod 163 is connected to the first telescopic assembly 150, and the other end is rotatably connected to one end of the second connecting rod 164. The other end of the second connecting rod 164 is rotatably connected to the first part 1211. One end of the third telescopic rod 165 is connected to the first telescopic assembly 150, and the other end is rotatably connected to one end of the fourth telescopic rod 166. The other end of the fourth telescopic rod 166 is rotatably connected to the second part 1212. When it is necessary to switch the first projection assembly 120 from the state of projecting to the external environment to the state of projecting to the back surface 1111, the third telescopic rod 165 and the fourth telescopic rod 166 can be controlled to extend, so that the second connecting rod 164 can rotate relative to the first connecting rod 163 and the fourth telescopic rod 166 can rotate relative to the third telescopic rod 165. Of course, the first connecting rod 163 and the second connecting rod 164 can also be telescopic rods to further expand the rotation angle range of the first projection assembly 120. Specifically, when the third telescopic rod 165 and the fourth telescopic rod 166 extend, the first connecting rod 163 and the second connecting rod 164 can contract.

[0069] The telescopic rod in the embodiments of the present application can be any device with a telescopic function. For example, the telescopic rod can be an electric push rod, a cylinder, a hydraulic cylinder, or a scissor-type telescopic mechanism. The rotatable connection in the embodiments of the present application can be a hinge connection.

[0070] See Figure 7 , the plane where the central axis k of the first telescopic component 150 is located is the first plane m, and the rotation direction of the first projection component 120 relative to the first telescopic component 150 can be located in the first plane m. The rotation direction of the first projection component 120 relative to the first telescopic component 150 being located in the first plane m can be understood as the rotation trajectory of the first projection component 120 being located in the first plane m. Of course, to expand the rotation adjustment range of the first projection component 120, the first rotation component 160 can further include a rotating platform 167 for rotating the first projection component 120 in the second plane n. The second plane n is a plane perpendicular to the central axis k of the first telescopic component 150. The rotation of the first projection component 120 in the second plane n can be understood as the rotation trajectory of the first projection component 120 being located in the second plane n. The rotating platform 167 can be directly driven by a motor to rotate.

[0071] The number of the first projection components 120 can be arbitrary. For example, see Figure 1 , the number of the first projection components 120 can be one. See Figure 6 , the number of the first projection components 120 can also be two. When the number of the first projection components 120 is two, among the two first projection components 120, one first projection component 120 can project the second image information onto the back surface 1111, and the other first projection component 120 can project the second image information onto the external environment. The image information projected by the two first projection components 120 can be the same or different.

[0072] To ensure that the second image information projected onto the back surface 1111 does not affect the wearer's experience, the display panel 111 can be made of a light-impermeable material. The second image information can be directly projected onto the back surface 1111. Of course, to make the second image information on the back surface 1111 display clearly, the display device body 110 can further include a projection film attached to the back surface 1111.

[0073] In the description of the present application, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In addition, in the description of the present application, unless otherwise specified, "a plurality of" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0074] The above-disclosed are only the preferred embodiments of the present application. Of course, the scope of rights of the present application cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. A head-mounted display device, characterized in that, include: A display device body, used to display first image information to a wearer and generate second image information based on the first image information, wherein the display device body includes a display panel having a display surface for displaying the first image information and a back surface opposite to the display surface; and a first projection component, located in the display device body and electrically connected to the display device body to obtain the second image information, and the first projection component is configured to project the second image information to a side of the display device body away from the wearer when the display device body displays the first image information to the wearer, the first projection component is located on one side of the back side of the display panel, and the first projection component is configured to project the second image information to the back side; a first telescopic assembly, one end of which is connected to the display device body and the other end of which is connected to the first projection assembly, wherein the first telescopic assembly is configured to enable the first projection assembly to move relative to the display device body along a first direction; the first direction is a direction from the back surface away from the display surface; a first rotating assembly, one end of which is connected to the end of the first telescopic assembly away from the display device body, and the other end of which is connected to the first projection assembly, wherein the first rotating assembly is configured to enable the first projection assembly to rotate relative to the first telescopic assembly, so that the first projection assembly can be switched between a first projection state and a second projection state, wherein in the first projection state, the first projection assembly projects the second image information to the rear surface, and in the second projection state, the first projection assembly projects the second image information to the external environment; The first projection assembly has a first portion and a second portion that are spaced apart from each other, and the first rotating assembly includes: A first telescopic rod, one end of which is connected to the first telescopic assembly and the other end of which is rotatably connected to the first portion; and A second telescopic rod is parallel to the first telescopic rod, and one end of the second telescopic rod is connected to the first telescopic assembly, and the other end of the second telescopic rod is rotatably connected to the second part; The first telescopic rod and the second telescopic rod are configured to drive the first projection assembly to rotate relative to the first telescopic assembly by changing a relative telescopic length.

2. The head-mounted display device according to claim 1, wherein The first projection component comprises: A light source for emitting a light beam; a polarization beam splitter, arranged on a transmission path of the light beam, for splitting the light beam into a first sub-beam with a first polarization state and a second sub-beam with a second polarization state; the first polarization state is perpendicular to the second polarization state; A chipset, electrically connected to the display device body to obtain the second image information. The chipset includes a first chip disposed on the transmission path of the first sub-beam and a second chip disposed on the transmission path of the second sub-beam. The first chip is configured to modulate the first sub-beam into a third sub-beam having the second polarization state and reflect the third sub-beam to the polarization beam splitter; the second chip is configured to modulate the second sub-beam into a fourth sub-beam having the first polarization state and reflect the fourth sub-beam to the polarization beam splitter; A projection lens, disposed on the transmission paths of the third sub-beam and the fourth sub-beam exiting from the polarization beam splitter, and configured to project using the third sub-beam to output a second polarized image and project using the fourth sub-beam to output a first polarized image.

3. The head-mounted display device according to claim 1, characterized in that, The first projection assembly includes: A first projector, electrically connected to the display device body to obtain the second image information, and configured to output the second image information as a first polarized image when the display device body displays the first image information to the wearer; and A second projector, electrically connected to the display device body to obtain the second image information, and configured to output the second image information as a second polarized image when the display device body displays the first image information to the wearer; the polarization state of the second polarized image is perpendicular to the polarization state of the first polarized image.

4. The head-mounted display device according to claim 3, wherein, The display device body further includes: A nose bridge, located in the middle of the display panel, and the first projection assembly is located on the side of the nose bridge away from the display surface.

5. The head-mounted display device according to claim 1, wherein Both the first part and the second part face away from the projection lens of the first projection assembly, and the first part and the second part are symmetric about the central axis of the projection lens.

6. The head-mounted display device according to claim 1, wherein, The first telescopic assembly is an electric push rod, a cylinder, a hydraulic cylinder or a scissor telescopic mechanism.

7. The head-mounted display device according to claim 4, wherein The number of the first projection assemblies is two. Among the two first projection assemblies, one first projection assembly projects the second image information to the back, and the other first projection assembly projects the second image information to the external environment.

8. The head-mounted display device according to claim 1, wherein The display device body further includes: A projection film, attached to the back.

9. The head-mounted display device according to claim 1, wherein, The second image information is the same as the first image information.

10. The head-mounted display device according to claim 1, wherein It further includes: A mode conversion component, configured to enable the first projection assembly to switch between a first projection mode and a second projection mode; In the first projection mode, the second image information is the same as the first image information, and in the second projection mode, the second image information is different from the first image information.

Images