Head-mounted display device

Abstract

The utility model relates to the technical field of projection display, and specifically discloses a head-mounted display device. The head-mounted display device is imaged on the retina of a user and comprises an image acquisition module, a display module and a control module, the image acquisition module is configured to acquire an external entity scene and generate image data; the display module comprises a pupil expanding assembly, a light scanning assembly and a light source assembly, the light source assembly is configured to generate combined laser, the light scanning assembly is configured to scan and reflect the combined laser, the pupil expanding assembly is configured to perform beam shaping on the combined laser, and the combined laser is incident to the light scanning assembly at an included angle; the light scanning assembly deflects and scans the combined laser into the pupil expanding assembly, and the combined laser emitted by the pupil expanding assembly enters the retina; the control module is configured to receive the image data from the image acquisition module and control the display module according to the image data. According to the equipment, through structural improvement, direct imaging on the retina is achieved, and the use experience of a user with visual impairment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of projection display, in particular to a head-mounted display device. Background Art

[0002] In recent years, the commercialization of AR (Augmented Reality) and VR (Virtual Reality) technologies has developed rapidly, but the current AR / VR display devices are mostly used in pan-entertainment scenarios. For example, VR devices are mostly immersive display experiences, that is, users wear VR glasses, which can produce virtual scenes in front of the user's eyes; AR devices are perspective display experiences, which enable human-computer interaction by adding specific virtual interfaces (images) to real scenes. Most of these devices form images (virtual or real images) in front of the user's eyes, which is not friendly to some user groups with visual impairments (such as high myopia, hyperopia, glaucoma or corneal detachment).

[0003] Moreover, most existing display devices are convenient to use for users with normal vision, but inconvenient to use for users with visual impairments (such as myopia or hyperopia). Visually impaired people often need to wear glasses when using display devices, which further reduces the user experience of myopic or hyperopic users. Utility Model Content

[0004] The purpose of the utility model is to provide a head-mounted display device, which improves the user experience of visually impaired users by directly imaging on the retina.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A head-mounted display device, which forms an image on the user's retina, comprises an image acquisition module, a display module and a control module; the image acquisition module is configured to acquire external physical scenes and generate image data; the display module comprises a pupil expansion component, a light scanning component and a light source component, the light source component is configured to generate a combined laser beam, the light scanning component is configured to scan and reflect the combined laser beam, the pupil expansion component is configured to perform beam shaping on the combined laser beam, the combined laser beam is incident on the light scanning component at an angle, the light scanning component deflects and scans the combined laser beam into the pupil expansion component, and the combined laser beam emitted through the pupil expansion component enters the retina; the control module is configured to receive the image data from the image acquisition module and control the display module according to the image data.

[0007] As an optional technical solution for the head-mounted display device, the light source assembly includes a laser beam combiner and multiple lasers, all of the lasers are mounted on the laser beam combiner, and the laser beam combiner is used to combine the lasers generated by all of the lasers into the combined laser beam and then emit it.

[0008] As an optional technical solution for the head-mounted display device, the laser beam combiner includes a planar optical waveguide and an adapter, all of the lasers are attached to the planar optical waveguide, and the adapter is fixed to one end of the planar optical waveguide.

[0009] As an optional technical solution for a head-mounted display device, the planar optical waveguide has a waveguide surface and a mounting surface, the waveguide surface is provided with an optical wave path, the number of the optical wave paths is the same as the number of the lasers, one end of the optical wave path is provided with a laser incident port, and all the laser incident ports are arranged separately, and the other ends of all the optical wave paths are merged to form a laser exit port; the lasers are attached to the mounting surface, and each of the lasers corresponds to one of the laser incident ports, the laser generated by the laser enters the optical wave path from the laser incident port and is emitted from the laser exit port.

[0010] As an optional technical solution for a head-mounted display device, the planar optical waveguide has a waveguide surface and a mounting surface, the waveguide surface is provided with an optical wave path, the number of the optical wave paths is the same as the number of the lasers, one end of the optical wave path is provided with a laser incident port, and all the laser incident ports are arranged separately, the other end of the optical wave path is provided with a laser exit port, and all the laser incident ports are arranged separately, and the spacing between two adjacent laser exit ports is 5 microns-15 microns; the laser is attached to the mounting surface, and each of the lasers corresponds to one of the laser incident ports, the laser generated by the laser enters the optical wave path from the laser incident port, and is emitted from the corresponding laser exit port.

[0011] As an optional technical solution for the head-mounted display device, the laser beam combiner also includes a substrate and a cover plate, the cover plate is covered on the waveguide surface, and the substrate is attached to a side of the planar optical waveguide away from the waveguide surface.

[0012] As an optional technical solution for a head-mounted display device, the adapter is provided with a light hole, the light hole having a light inlet and a light outlet, a collimating lens is arranged in the light hole, the laser outlet is aligned with the light inlet, and after the laser generated by the laser enters the light hole, the light beam is collimated by the collimating lens and emitted from the light outlet.

[0013] As an optional technical solution for the head-mounted display device, the optical scanning component includes a dual-axis MEMS micromirror module, and the dual-axis MEMS micromirror module includes a micromirror. When the combined laser beam is irradiated onto the micromirror, the micromirror can deflect and scan the combined laser beam.

[0014] As an optional technical solution for a head-mounted display device, the pupil expansion component includes a front lens group, a turning reflector and a rear lens group. The combined laser beam deflected and reflected by the light scanning component is transmitted through the front lens group, and then changes direction through the turning reflector to enter the rear lens group. The combined laser beam emitted from the rear lens group forms an image corresponding to the physical scene on the retina.

[0015] As an optional technical solution for a head-mounted display device, the front lens group includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens, and the combined laser beam passes through the first lens, the second lens, the third lens, the fourth lens and the fifth lens in sequence; the first lens is a concave-convex lens, the concave surface is the light incident surface, and the convex surface is the light exiting surface; the second lens is a concave-convex lens, the concave surface is the light incident surface, and the convex surface is the light exiting surface; the third lens is a plano-convex lens, the flat surface is the light incident surface, and the convex surface is the light exiting surface; the fourth lens is a biconvex lens; the fifth lens is a concave-convex lens, the concave surface is the light incident surface, and the convex surface is the light exiting surface.

[0016] As an optional technical solution for a head-mounted display device, the head-mounted display device also includes two frames and two support bodies, the ends of the two frames that are close to each other are fixedly connected via a nose bridge, and the ends of the two frames that are away from each other are fixedly connected to one of the support bodies, and the support bodies are used to hook the ears of the user. Each of the frames and the corresponding support body form a accommodating cavity, and the image acquisition module, the display module and the control module are arranged in the accommodating cavity.

[0017] Beneficial effects of the utility model:

[0018] The head-mounted display device first obtains the physical scene of the outside world through the image acquisition module, and then uses the display module to image the combined laser beam on the user's retina. The control module is used to control the generation of the combined laser beam at the light source component, the scanning reflection of the combined laser beam at the light scanning component, and the beam shaping of the combined laser beam at the pupil expansion component, so as to achieve fine adjustment of the combined laser beam entering the retina, optimize the imaging effect, and thus adapt to different users. The above structure adopts the method of direct imaging on the retina, which improves the user experience of users with partial lesions in the eye structure but normal retina and optic nerve (such as high myopia, hyperopia, glaucoma and corneal detachment, etc.), allowing users to see clear real scenes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a head mounted display device provided by an embodiment of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure of a head mounted display device and a retina provided in an embodiment of the utility model;

[0021] Figure 3 It is a structural schematic diagram of a light source assembly, a light scanning assembly, a pupil expansion assembly, a control module, an image acquisition module and a retina provided in an embodiment of the utility model;

[0022] Figure 4 It is a schematic diagram of the structure of a laser, a planar optical waveguide and an adapter provided by an embodiment of the utility model;

[0023] Figure 5 It is a structural schematic diagram of a light source assembly provided by an embodiment of the utility model;

[0024] Figure 6 It is a schematic diagram of the structure of a micro-reflector, a pupil expansion component and a retina provided in an embodiment of the utility model.

[0025] In the figure:

[0026] 1. Frame; 2. Support body; 3. Light source assembly; 31. Laser; 32. Laser beam combiner; 321. Planar optical waveguide; 3210. Light wave path; 3211. Waveguide surface; 3212. Mounting surface; 322. Adapter; 323. Substrate; 324. Cover plate; 4. Light scanning assembly; 41. Micro-reflector; 5. Pupil expansion assembly; 501. Entrance pupil position; 502. Exit pupil position; 51. Front lens group; 511. First lens; 512. Second lens; 513. Third lens; 514. Fourth lens; 515. Fifth lens; 52. Turning reflector; 53. Rear convex-planar lens; 6. Control module; 7. Image acquisition module; 8. Retina; 9. Nose bridge. DETAILED DESCRIPTION

[0027] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] like Figures 1 to 4 As shown, Figure 2The frame 1 and the support body 2 in the embodiment are perspectively displayed. The present embodiment provides a head-mounted display device, which is imaged on the user's retina 8. The head-mounted display device includes an image acquisition module 7, a display module and a control module 6; the image acquisition module 7 is configured to acquire a physical scene of the outside world and generate image data; the display module includes a pupil expansion component 5, an optical scanning component 4 and a light source component 3, the light source component 3 is configured to generate a combined laser beam, the optical scanning component 4 is configured to scan and reflect the combined laser beam, the pupil expansion component 5 is configured to perform beam shaping on the combined laser beam, the combined laser beam is incident on the optical scanning component 4 at an angle, the optical scanning component 4 deflects and scans the combined laser beam into the pupil expansion component 5, and the combined laser beam emitted by the pupil expansion component 5 enters the retina 8; the control module 6 is configured to receive image data from the image acquisition module 7 and control the display module according to the image data.

[0032] The head-mounted display device first obtains the physical scene of the outside world through the image acquisition module 7, and then uses the display module to image the combined laser beam on the user's retina 8. The control module 6 is used to control the generation of the combined laser beam at the light source component 3, and the scanning reflection of the combined laser beam at the light scanning component 4 is then shaped by the pupil expansion component 5 to achieve fine adjustment of the combined laser beam entering the retina 8, optimize the imaging effect, and thus adapt to different users. The above structure adopts the method of direct imaging on the retina 8, which improves the user experience of users with partial lesions in the eye structure but normal retina 8 and optic nerve (such as high myopia, hyperopia, glaucoma and corneal detachment, etc.), allowing users to see clear real scenes.

[0033] In this embodiment, the light source assembly 3 , the light scanning assembly 4 and the image acquisition module 7 are electrically connected to the control module 6 respectively.

[0034] In this embodiment, the light source assembly 3 includes a laser beam combiner 32 and multiple lasers 31. All lasers 31 are mounted on the laser beam combiner 32. The laser beam combiner 32 is used to combine the lasers generated by all lasers 31 into a combined laser beam and then emit it.

[0035] Furthermore, if Figure 3 and Figure 4 As shown, the laser beam combiner 32 includes a planar optical waveguide 321 and an adapter 322. All lasers 31 are attached to the planar optical waveguide 321, and the adapter 322 is fixed to one end of the planar optical waveguide 321. Specifically, the adapter 322 is disposed in a bayonet on one side of the planar optical waveguide 321.

[0036] The planar optical waveguide 321 is used to combine the laser beams, and the specific structure of the laser beam combiner 32 is improved. Compared with the traditional prism or reflector beam combining structure, the above improvement reduces the size of the light source assembly 3, helps to realize the miniaturization design of the overall optical path, and significantly reduces the volume of the head-mounted display device, making it more convenient for users to wear.

[0037] In one implementation of the present embodiment, the planar optical waveguide 321 has a waveguide surface 3211 and a mounting surface 3212, the waveguide surface 3211 is provided with lightwave paths 3210, the number of lightwave paths 3210 is the same as that of lasers 31, one end of the lightwave paths 3210 is provided with a laser incident port, and all the laser incident ports are arranged separately, and the other ends of all the lightwave paths 3210 are merged to form a laser exit port; the lasers 31 are attached to the mounting surface 3212, and each laser 31 corresponds to a laser incident port, the laser generated by the laser 31 enters the lightwave path 3210 from the laser incident port, and is emitted from the laser exit port.

[0038] By adopting the above structural definition, the laser path emitted by each laser 31 is planned, ensuring that all lasers can be combined smoothly, thereby ensuring that the adapter 322 can combine all lasers. The above planar optical waveguide 321 has a simple and reliable structure, high working stability and small space occupation.

[0039] Specifically, the laser 31 includes at least one red laser, at least one green laser and at least one blue laser. The red laser is used to generate red laser, the green laser is used to generate green laser, and the blue laser is used to generate blue laser.

[0040] This embodiment does not limit the number of lasers 31. For example, the red laser, the green laser, and the blue laser can all be set to one; or two red lasers can be set, and the green laser and the blue laser can all be set to one. Different numbers can be set according to different color and brightness requirements, as long as the light wave path 3210 is the same as the number of lasers 31 and corresponds one to one.

[0041] In another implementation of this embodiment, a laser input port is provided at one end of the light wave path 3210, and a laser output port is provided at the other end, and all the laser input ports are arranged separately, and the spacing between two adjacent laser output ports is 5 microns to 15 microns. Specifically, the spacing between two adjacent laser output ports is 10 microns.

[0042] By improving the structural layout at the laser outlet, different design ideas are provided for the structural design of the planar optical waveguide 321. Under the premise of ensuring the laser focusing capability of the planar optical waveguide 321, different design schemes are helpful to improve the specific structure of the planar optical waveguide 321, reduce the design cost of the planar optical waveguide 321, and optimize the application scenarios of the planar optical waveguide 321.

[0043] like Figure 4 and Figure 5 As shown, in this embodiment, Figure 5 The cover plate 324 on the light source assembly 3 in FIG. 3 is shown in perspective. The laser beam combiner 32 further includes a substrate 323 and a cover plate 324. The cover plate 324 is covered on the waveguide surface 3211. The substrate 323 is attached to a side of the planar optical waveguide 321 away from the waveguide surface 3211. The planar optical waveguide 321 is made of glass and is protected by the substrate 323 and the cover plate 324. The cover plate 324 can also protect the optical wave path 3210.

[0044] Exemplarily, the adapter 322 is provided with a light hole having a light inlet and a light outlet. A collimating lens is arranged in the light hole, and the laser outlet is aligned with the light inlet. After the laser generated by the laser 31 enters the light hole, the light beam is collimated by the collimating lens and emitted from the light outlet.

[0045] By adopting the arrangement of the light hole and the collimating lens, the structural definition of the adapter 322 is achieved, and the working principle of the component is clarified, thereby ensuring the light beam collimation capability of the adapter 322 and improving the working effect of the laser beam combiner 32.

[0046] In this embodiment, the optical scanning component 4 includes a dual-axis MEMS (Micro-Electro-Mechanical System) micromirror module, and the dual-axis MEMS micromirror module includes a micro-reflector 41. When the combined laser beam is irradiated onto the micro-reflector 41, the micro-reflector 41 can deflect and scan the combined laser beam. Specifically, the control module 6 can fine-tune the position of the micro-reflector 41 to achieve the adjustment of the scanning reflection of the combined laser beam.

[0047] like Figure 1 , Figure 2 and Figure 6 As shown, exemplarily, the pupil expansion component 5 includes a front lens group 51, a turning reflector 52 and a rear lens group. The combined laser beam deflected and reflected by the optical scanning component 4 is transmitted through the front lens group 51, and then changes direction through the turning reflector 52 to enter the rear lens group. The combined laser beam emitted from the rear lens group forms an image corresponding to the physical scene on the retina 8.

[0048] Through the structural layout of the front lens group 51, the turning reflector 52 and the rear lens group, the pupil expansion component 5 plays the role of imaging and light collection, so that the field of view angles of the light scanning component 4, the pupil expansion component 5 and the retina 8 can be matched and set, and through the coordination of the optical focal length of all lenses in the pupil expansion component 5, the field of view of the pupil expansion component 5 is expanded, and the aberration and distortion at the display module are avoided, so that the pupil expansion component 5 can meet the high-resolution requirements in the full field of view, which is convenient for meeting the high-quality imaging requirements of the head-mounted display device and helps to achieve a lightweight design.

[0049] In this embodiment, the micro-reflector 41 is located at the entrance pupil position 501 of the pupil expansion component 5, and the exit pupil position 502 of the pupil expansion component 5 is located on the surface of the user's eye. Specifically, the pupil expansion ratio of the pupil expansion component 5 (i.e., the ratio of the exit pupil spot size to the entrance pupil spot size) is between 1.3 and 1.5, the spot size at the entrance pupil is about 0.7 mm, and the spot size at the exit pupil is about 1.0 mm. At this time, the pupil expansion ratio is about 1.4.

[0050] The optical path length before the deflection reflector 52 is 75 mm to 85 mm, and the pupil distance from the rear lens group to the user's eye is 18 mm to 22 mm.

[0051] Furthermore, the front lens group 51 includes a first lens 511, a second lens 512, a third lens 513, a fourth lens 514 and a fifth lens 515, and the combined laser beam passes through the first lens 511, the second lens 512, the third lens 513, the fourth lens 514 and the fifth lens 515 in sequence; the first lens 511 is a concave-convex lens, the concave surface is the light incident surface, and the convex surface is the light emitting surface; the second lens 512 is a concave-convex lens, the concave surface is the light incident surface, and the convex surface is the light emitting surface; the third lens 513 is a plano-convex lens, the flat surface is the light incident surface, and the convex surface is the light emitting surface; the fourth lens 514 is a biconvex lens; the fifth lens 515 is a concave-convex lens, the concave surface is the light incident surface, and the convex surface is the light emitting surface.

[0052] The combined laser beam passes through the first lens 511, the second lens 512, the third lens 513, the fourth lens 514 and the fifth lens 515 in sequence, and then enters the deflection reflector 52. The combined laser beam passes through the front lens group 51, and the front lens group 51 forms an image of the light beam through five lenses and enters the deflection reflector 52 and then passes through the rear lens group to form an image on the retina 8 after pupil expansion.

[0053] Specifically, the first lens 511 is abutted against the second lens 512, and the fourth lens 514 is abutted against the fifth lens 515; the rear lens group includes a rear convex-plano lens 53, the convex surface of the rear convex-plano lens 53 is the light incident surface, and the flat surface is the light emitting surface.

[0054] In this embodiment, the specific configuration of the front lens group 51 and the rear lens group is not limited, so as to ensure that the pupil expansion ratio is between 1.3 and 1.5. All lenses are spherical lenses, which have the advantage of low manufacturing cost.

[0055] In this embodiment, the head-mounted display device also includes two frames 1 and two support bodies 2. The ends of the two frames 1 that are close to each other are fixedly connected through a nose bridge 9, and the ends of the two frames 1 that are away from each other are fixedly connected to a support body 2, and the support body 2 is used to hook the user's ears. Each frame 1 and the corresponding support body 2 form a receiving cavity, and an image acquisition module 7, a display module and a control module 6 are provided in the receiving cavity.

[0056] The support body 2 is used to hook the user's ears so that the head-mounted display device is worn on the user's head, and the frame body 1 is roughly located in front of the user's eyes, so as to ensure that the display module is accurately facing the user's eyes. The above improvements ensure the accuracy of the head-mounted display device being worn on the user's head, improve the convenience of the user's wearing, and improve the user's experience. In other implementations of this embodiment, the support body 2 is supported around the user's head.

[0057] The arrangement of the accommodating cavity provides accommodation space for the image acquisition module 7, the display module and the control module 6, reduces the risk of damage to the above components and improves the overall aesthetics of the head-mounted display device.

[0058] Specifically, the light source assembly 3 and the control module 6 are arranged in the area surrounded by the support body 2 , the pupil expansion assembly 5 is arranged in the area surrounded by the frame body 1 , and the light scanning assembly 4 is located in the area surrounded by both the support body 2 and the frame body 1 .

[0059] At the same time, a shooting hole connecting the accommodating cavity and the outside is opened on the frame 1, and the image acquisition module 7 acquires the physical scene of the outside from the shooting hole, and the image acquisition module 7 is directly opposite to the shooting hole or partially passes through the shooting hole. Specifically, the image acquisition module 7 is arranged on the side of the frame 1 away from the user's eyes to acquire the physical scene in front of the user.

[0060] Moreover, according to the design of arranging the components on both sides of the nose bridge 9 in pairs, two different systems can be configured to achieve independent imaging of the patient's two eyes. The above improvements make it possible for the images displayed by the head-mounted display device at the user's two eyes to not affect each other, avoiding the situation where the head-mounted display device as a whole cannot operate due to local failures, and also reducing the difficulty and cost of maintenance.

[0061] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A head mounted display device, imaging on the user's retina (8), characterized in that: The head mounted display device comprises: An image acquisition module (7) is configured to acquire external physical scenes and generate image data; The display module comprises a pupil expansion component (5), a light scanning component (4) and a light source component (3), wherein the light source component (3) is configured to generate a combined laser beam, the light scanning component (4) is configured to scan and reflect the combined laser beam, the pupil expansion component (5) is configured to perform beam shaping on the combined laser beam, the combined laser beam is incident on the light scanning component (4) at an angle, the light scanning component (4) deflects and scans the combined laser beam into the pupil expansion component (5), and the combined laser beam emitted from the pupil expansion component (5) enters the retina (8); The control module (6) is configured to receive the image data from the image acquisition module (7) and control the display module according to the image data.

2. The head mounted display device according to claim 1, characterized in that: The light source assembly (3) comprises a laser beam combiner (32) and a plurality of lasers (31), all of the lasers (31) are mounted on the laser beam combiner (32), and the laser beam combiner (32) is used to combine the lasers generated by all of the lasers (31) into the combined laser beam and then emit it.

3. The head mounted display device according to claim 2, characterized in that: The laser beam combiner (32) comprises a planar optical waveguide (321) and an adapter (322), all of the lasers (31) are attached to the planar optical waveguide (321), and the adapter (322) is fixed to one end of the planar optical waveguide (321).

4. The head mounted display device according to claim 3, characterized in that: The planar optical waveguide (321) comprises a waveguide surface (3211) and a mounting surface (3212); a light wave path (3210) is arranged on the waveguide surface (3211); the number of the light wave paths (3210) is the same as that of the lasers (31); a laser incident port is arranged at one end of the light wave path (3210); all the laser incident ports are arranged separately; the other ends of all the light wave paths (3210) are combined to form a laser exit port; the lasers (31) are attached to the mounting surface (3212); each of the lasers (31) corresponds to one of the laser incident ports; laser light generated by the lasers (31) enters the light wave path (3210) from the laser incident port and is emitted from the laser exit port.

5. The head mounted display device according to claim 3, characterized in that: The planar optical waveguide (321) comprises a waveguide surface (3211) and a mounting surface (3212); a light wave path (3210) is arranged on the waveguide surface (3211); the number of the light wave paths (3210) is the same as that of the lasers (31); a laser input port is arranged at one end of the light wave path (3210), and all the laser input ports are arranged separately; a laser output port is arranged at the other end of the light wave path (3210), and all the laser input ports are arranged separately, and the spacing between two adjacent laser output ports is 5 micrometers to 15 micrometers; the lasers (31) are attached to the mounting surface (3212), and each of the lasers (31) corresponds to one of the laser input ports; laser light generated by the lasers (31) enters the light wave path (3210) from the laser input port and is emitted from the corresponding laser output port.

6. The head mounted display device according to claim 4 or 5, characterized in that: The laser beam combiner (32) further comprises a substrate (323) and a cover plate (324), wherein the cover plate (324) is arranged on the waveguide surface (3211), and the substrate (323) is attached to a side of the planar optical waveguide (321) away from the waveguide surface (3211).

7. The head mounted display device according to claim 4 or 5, characterized in that: The adapter (322) is provided with a light hole, the light hole having a light inlet and a light outlet, a collimating lens is arranged in the light hole, the laser outlet is aligned with the light inlet, and after the laser generated by the laser (31) enters the light hole, the light beam is collimated by the collimating lens and emitted from the light outlet.

8. The head mounted display device according to claim 1, characterized in that: The optical scanning component (4) comprises a dual-axis MEMS micromirror module, and the dual-axis MEMS micromirror module comprises a micro-reflector (41). When the combined laser beam is irradiated onto the micro-reflector (41), the micro-reflector (41) can deflect and scan the combined laser beam.

9. The head mounted display device according to claim 1, characterized in that: The pupil expansion component (5) comprises a front lens group (51), a deflection reflector (52) and a rear lens group. The combined laser beam deflected and reflected by the optical scanning component (4) is transmitted through the front lens group (51), and then changes direction through the deflection reflector (52) to enter the rear lens group. The combined laser beam emitted from the rear lens group forms an image corresponding to the physical scene on the retina (8).

10. The head mounted display device according to claim 9, characterized in that: The front lens group comprises a first lens (511), a second lens (512), a third lens (513), a fourth lens (514) and a fifth lens (515); the combined laser beam passes through the first lens (511), the second lens (512), the third lens (513), the fourth lens (514) and the fifth lens (515) in sequence; the first lens (511) is a concave-convex lens, the concave surface is the light incident surface, and the convex surface is the light emitting surface; the second lens (512) is a concave-convex lens, the concave surface is the light incident surface, and the convex surface is the light emitting surface; the third lens (513) is a plano-convex lens, the plane surface is the light incident surface, and the convex surface is the light emitting surface; the fourth lens (514) is a biconvex lens; the fifth lens (515) is a concave-convex lens, the concave surface is the light incident surface, and the convex surface is the light emitting surface.

11. The head mounted display device according to claim 1, characterized in that: The head-mounted display device further comprises two frames (1) and two support bodies (2), the ends of the two frames (1) close to each other are fixedly connected via a nose bridge (9), and the ends of the two frames (1) facing away from each other are fixedly connected to one support body (2), the support body (2) is used to hook the ears of the user, and each frame (1) and the corresponding support body (2) form a receiving cavity, wherein the image acquisition module (7), a display module and a control module (6) are arranged in the receiving cavity.

Images