CN211577567U - Head-mounted display device - Google Patents

Abstract

Embodiments of the present specification provide a head-mounted display device. In the head-mounted display device, the optical imaging device includes an image source element, a light splitting element and a reflection element configured to be aligned with the optical path; the structure of the absorption element and the arrangement position in the optical imaging device are such that the absorption element absorbs the first At least part of the stray light in a light region and the real scene light passing through the second light region, the first light region is determined by the position of the eyeglass image and the two ends of the light splitting element, the first light region The two-ray area is determined by the position of the human eye, the viewing angle of the human eye, and the end of the light splitting element far from the image source element, wherein the viewing angle of the human eye includes 70°, and the image position of the human eye is the position of the human eye. The mirror symmetry point of the eye position with respect to the light splitting element can improve the user experience of wearing the head-mounted display device.

Description

Head mounted display device

technical field

The embodiments of this specification relate to the field of smart wearable electronic devices, and in particular, to a head-mounted display device.

Background technique

With the continuous development of science and technology, head-mounted display devices are widely used in people's daily life, entertainment and work. Through the head-mounted display device, an optical imaging system can be used to amplify the image on the ultra-fine display screen to convert the image. Projected on the retina, which presents a large-screen virtual image in the eyes of the viewer.

At present, when the head-mounted display device displays a virtual image, some undesired light (ie, stray light) will irradiate on the optical imaging device, so that the image information carried by the stray light will affect the virtual image seen by the user. Image quality, which degrades the user experience of the head-mounted display device.

For the above problems, there is currently no better solution in the industry.

Utility model content

In view of the above problems, embodiments of the present specification provide a head-mounted display device. Using the head-mounted display device, the stray light in the first light area will be absorbed by the absorbing element, thereby eliminating the stray light reflected to the human eye through the beam splitter, and the real scene light in the second light area will not be blocked , so that the user can see the external real scene while watching the high-quality imaging image, which improves the user experience of the head-mounted display device.

According to an aspect of the embodiments of the present specification, there is provided a head-mounted display device, comprising: an optical imaging device including an image source element, a light splitting element and a reflection element configured to be aligned with the optical path; an absorption element, The structure and the arrangement position in the optical imaging device are such that the absorbing element absorbs at least part of the stray light in the first light region and passes through the real scene light in the second light region, the first light region is produced by human glasses The image position and the two ends of the light splitting element are determined, the second light area is determined by the position of the human eye and the viewing angle of the human eye and the end of the light splitting element far away from the image source element, wherein the The viewing angle of the human eye includes 70°, and the image position of the human eye is the mirror symmetry point of the position of the human eye with respect to the light splitting element.

Optionally, in an example of the above aspect, the absorbing element may include a substrate and a plurality of absorbing structures, each of the absorbing structures is arranged in sequence and spaced apart, determined by the image position of the human eye and each of the absorbing structures. The area may cover at least a portion of the first ray area, and the area determined by the human eye position and at least one gap covers the real scene rays of the second ray area, wherein the gap is absorbed by the adjacent The space between the structures is formed; the arrangement position of the base can make the base pass through the light of the real scene.

Optionally, in an example of the above aspect, the plane on which the absorption element is located may pass through the position of the human eye and the end of the light splitting element away from the image source element, and is defined by the human eyeglasses. The area defined by the image position and both ends of the absorbing element may cover the first light area.

Optionally, in an example of the above aspect, the inclination angle of each absorption structure relative to the main optical axis of the optical imaging device may be within a line-of-sight angle range, and the minimum line-of-sight angle in the line-of-sight angle range. is determined by the position of the human eye and the end of the light splitting element far from the image source element, and the maximum line of sight angle in the range of sight angles is determined by the position of the human eye and the angle of view of the human eye to be sure.

Optionally, in an example of the above-mentioned aspect, the light-absorbing bonding area formed by the first end of the first absorption structure and the second end of the second absorption structure adjacent to each other in the respective absorption structures arranged at intervals in sequence passes through. In the eyeglass image position, the first end of the first absorbing structure and the second end of the second absorbing structure are close to each other, and the second end of the first absorbing structure and the second end of the second absorbing structure are close to each other. The first ends are spaced away from each other.

Optionally, in an example of the above aspect, the plane on which the respective absorbing structures are located may pass through the position of the human eye.

Optionally, in an example of the above aspect, the planes on which the respective absorbing structures are located may be parallel to each other.

Optionally, in an example of the above aspect, the head-mounted display device may further include an optical path correction element, the structure of the optical path correction element and the arrangement position in the optical imaging device enable the optical path correction element The light transmitted through the gap is transmitted to the position of the human eye.

Optionally, in one example of the above aspect, the respective absorbent structures may be attached to the surface of the substrate.

Optionally, in one example of the above aspect, the respective absorbent structures may be embedded in the substrate.

Optionally, in one example of the above aspect, the respective absorbing structures may be formed as a microstructure array distribution.

Optionally, in an example of the above aspect, the absorbing element may be formed as a planar structure or a recessed structure.

Optionally, in an example of the above aspect, the absorbing structure may comprise a light absorbing coating.

Optionally, in an example of the above aspect, the absorption band of the light-absorbing coating may include the entire visible light band.

Optionally, in an example of the above aspect, one end of the absorbing element may be attached to the end of the spectroscopic element remote from the image source element and/or to the end of the reflective element remote from the image source element. one end.

Optionally, in an example of the above aspect, the image source element includes an aberration corrector.

Description of drawings

A further understanding of the nature and advantages of the content of the embodiments of this specification may be realized by reference to the following drawings. In the drawings, similar components or features may have the same reference numerals. The accompanying drawings are used to provide a further understanding of the embodiments of the present invention, and constitute a part of the specification, and together with the following detailed description, are used to explain the embodiments of the present specification, but do not constitute a limitation to the embodiments of the present specification. In the attached image:

FIG. 1 shows a schematic structural diagram of an example of an optical imaging device according to an embodiment of the present specification;

FIG. 2 shows a structural block diagram of an example of a head-mounted display device according to an embodiment of the present specification;

3 shows a schematic diagram of an example of background stray light absorbed by an absorbing element according to an embodiment of the present specification;

4A shows a schematic diagram of an example of a first light region in an optical imaging device according to an embodiment of the present specification;

4B shows a schematic diagram of an example of a second light region in an optical imaging device according to an embodiment of the present specification;

5 shows a schematic diagram of the angle distribution of an example of the included angle between the first light region and the second light region with respect to the main optical axis according to an embodiment of the present specification;

FIG. 6 shows a schematic structural diagram of an example of a head-mounted display device according to an embodiment of the present specification;

FIG. 7 shows a schematic structural diagram of an example of a head-mounted display device according to an embodiment of the present specification;

FIG. 8 shows a schematic structural diagram of an example of an absorbing element according to an embodiment of the present specification;

FIG. 9 shows a schematic structural diagram of an example of an absorbing element according to an embodiment of the present specification;

FIG. 10A shows a schematic structural diagram of an example of an absorbing element according to an embodiment of the present specification;

FIG. 10B shows a schematic structural diagram of an example of an absorbing element according to an embodiment of the present specification;

FIG. 10C shows a schematic structural diagram of an example of an absorbing element according to an embodiment of the present specification;

Figure 10D shows a schematic structural diagram of an example of an absorbent element according to an embodiment of the present specification; and

FIG. 11 shows a schematic structural diagram of an example of a head-mounted display device according to an embodiment of the present specification.

Detailed ways

The subject matter described herein will be discussed below with reference to example embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and not to limit the scope of protection, applicability, or examples set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the scope of the embodiment content of this specification. Various examples may omit, substitute, or add various procedures or components as desired. Additionally, features described with respect to some examples may also be combined in other examples.

As used herein, the term "including" and variations thereof represent open-ended terms meaning "including but not limited to". The term "based on" means "based at least in part on". The terms "one embodiment" and "an embodiment" mean "at least one embodiment." The term "another embodiment" means "at least one other embodiment." The terms "first", "second", etc. may refer to different or the same objects. Other definitions, whether explicit or implicit, may be included below. The definition of a term is consistent throughout the specification unless the context clearly dictates otherwise.

The term "ray area" refers to an area in which visible light is present such that objects or objects in the light area are visible to the human eye. The term "stray light" refers to undesired light that deviates from the imaging light path.

FIG. 1 shows a schematic structural diagram of an example of an optical imaging device according to an embodiment of the present specification.

The optical imaging device 100 shown in FIG. 1 includes an image source element 110, a beam splitter element 120 and a reflection element 130, and the image source element 110, the beam splitter element 120 and the reflection element 130 are optically aligned. In this way, the image light projected by the image source element 110 (represented by a solid line in the figure) is amplified by the spectroscopic element 120 and the light-reflecting element 130, so that the virtual image can be seen at the position E of the human eye, thereby achieving a pair of optical paths. accurate target. Specifically, the light-splitting element 120 and the light-reflecting element 130 may be coated with a transflective film or a polarizing film. In addition, the light-splitting element 120 and the light-reflecting element 130 in the optical imaging device 100 have visibility, so that the virtual image scene can also be viewed while viewing the external real scene (represented by a dotted line in the figure), thereby realizing AR (Augmented Reality, augmented reality) display function. In addition, when the head-mounted display device is equipped with the optical imaging device, the head-mounted display device is an AR device.

It should be noted that the components in the optical imaging device 100 may also be adjusted to realize different display functions. For example, the reflective element 130 is adjusted to be a non-see-through optical component, so that the optical imaging device 100 can realize a VR (Virtual Reality, virtual reality) display function. In addition, when the head-mounted display device is equipped with the optical imaging device, the head-mounted display device is an AR device.

FIG. 2 shows a structural block diagram of an example of a head-mounted display device according to an embodiment of the present specification.

As shown in FIG. 2 , the head-mounted display device 200 includes an optical imaging device 100 and an absorbing element 210 , and the absorbing element 210 can absorb and eliminate visible light. Here, the absorption element 210 can eliminate part of the stray light entering the optical imaging device 100 , especially the background stray light Z reflected to the position E of the human eye through the light splitting element 120 . It should be understood that the human eye position E may represent the position where the user's human eyes are when wearing the head-mounted display device.

3 shows a schematic diagram of an example of background stray light absorbed by an absorbing element according to an embodiment of the present specification.

As shown in FIG. 3 , the ambient light below the optical imaging device 100 illuminates the light splitting element 120 and is reflected to the position E of the human eye. At this time, the human eye can not only see the virtual image scene and the real image scene, but also Background image information (eg, ground, clothes, etc.) carried by background stray light appears, which interferes with image imaging quality.

In the embodiment of the present specification, by applying the absorption element 210, at least a part (eg, part or all) of the background stray light Z can be absorbed and eliminated, thereby improving the image display quality.

In some application scenarios, when the user wears the head-mounted display device, although the user does not want to see the background image information carried by the background stray light in the imaging image, the user also needs to be able to see the outside directly or through the naked eye. Real scene lighting in the environment (for example, below the device). Therefore, the structure and arrangement position of the absorbing element 210 in the optical imaging device cannot be arbitrarily set to ensure that at least part of the background stray light can be absorbed while still not blocking the real scene light hitting the position E of the human eye.

Specifically, the structure of the absorption element 210 and the arrangement position in the optical imaging device 100 are such that the absorption element at least absorbs at least part of the stray light in the first light region and passes through the real scene light in the second light region. Here, the stray light may mainly include background stray light.

FIG. 4A shows a schematic diagram of an example of a first light region in an optical imaging device according to an embodiment of the present specification.

As shown in FIG. 4A , the optical imaging device 400 includes an image source element 410 , a light splitting element 420 and a reflection element 430 aligned with the optical path. In the example of this specification, one end of the light splitting element 420 is attached to the end of the reflective element 430 remote from the image source element 410 . The human eye image position E' is the mirror symmetry point of the human eye position E with respect to the light splitting element 420. Here, the first light area is determined by the image position E' of the human eyeglass and the two ends A1 and A2 of the light splitting element, for example, the area formed by the two light beams at the A1 end and the A2 end reaching the E' position respectively. In this paper, the main optical axis of the optical imaging device 400 can be represented by R, for example, the beam splitting element 420 can form an angle of 45 degrees with the main optical axis, and the angles between different light directions and the main optical axis R can be represented by α to represent. In this way, the straight line E'A1 can represent the maximum background stray light angle 401, and the straight line E'A2 can represent the minimum background stray light angle 402, and the light area Q1 corresponding to the background stray light angle range can be used to represent the first light area.

In the embodiment of the present specification, the absorbing element can absorb at least part of the stray light in the first light region Q1. Therefore, the absorbing element can absorb the reflected light emitted by the light splitting element to the position of the human eye, thereby eliminating the background image information in the imaging image and improving the imaging quality.

FIG. 4B shows a schematic diagram of an example of a second light region in an optical imaging device according to an embodiment of the present specification.

As shown in FIG. 4B , the second light area is determined by the position E of the human eye and the viewing angle of the human eye and the end A2 of the light splitting element 420 that is far away from the image source element 410. Here, the viewing angle of the human eye may represent the determined maximum viewing angle of the human eye, for example, the viewing angle of the human eye is usually 70°. Further, the maximum line of sight direction 403 is determined by the position E of the human eye and the angle of view of the human eye, and the straight line EA2 can represent the minimum line of sight direction 404, and the line of sight range Q2 of the human eye between the maximum line of sight direction and the minimum line of sight direction can be used to represent the second ray area.

In the embodiment of this specification, the absorption element passes through the real scene light of the second light region Q2. Therefore, the absorbing element will not block the human eyes from viewing the real scene of the external environment, which can improve the viewing experience of the user of the head-mounted display device.

FIG. 5 shows a schematic diagram of the angle distribution of an example of the included angle between the first light region and the second light region with respect to the main optical axis according to an embodiment of the present specification.

As shown in FIG. 5 , the included angle interval 510 may represent the second light ray area Q2 (ie, the line of sight angle range) between 403 and 404 , and the included angle interval 520 may represent the first light ray between 401 and 402 area (ie, stray light angle range). It is not difficult to see that there are overlapping angular intervals between the stray light angle ranges and the line-of-sight angle ranges. Therefore, in order to absorb at least part of the stray light in the first light region and not block the real scene light in the second light region, the structure of the absorption element and its arrangement position in the optical imaging device are particularly important.

FIG. 6 shows a schematic structural diagram of an example of a head-mounted display device according to an embodiment of the present specification.

As shown in FIG. 6 , the head-mounted display device 600 includes an optical imaging device and an absorbing element 640, and the optical imaging device includes an image source element 610, a light splitting element 620 and a reflecting element 630 aligned with the optical path. In an example of this specification, the plane where the absorption element 640 is located passes through the position E of the human eye and the end (ie, the A2 end) of the light splitting element 620 away from the image source element 610 . That is to say, the absorbing element 640 is coincident with the minimum line of sight direction, so that the light absorbing element 640 will not block the real scene light within the visual field of the human eye. In addition, the area defined by the eyeglass image position E' and the two ends of the absorbing element covers the first ray area. Referring to the example in FIG. 6 , the area Q3 defined by the image position E' of the human eye and the two ends of the absorbing element includes Q1, so that all background stray light in the stray light range can be absorbed. It should be noted that when the length of the absorption element 640 is changed, the range of Q3 will also change accordingly, but Q3 can be at least greater than or equal to Q1, so that the background stray light can be completely covered and the imaging quality is guaranteed.

In the example of FIG. 6 , one end of the absorbing element 640 is attached to the end (ie, the A2 end) of the beam splitting element 620 away from the image source element 610 , and the A2 end is attached to the end of the reflective element 630 away from the image source element 610 . . It should be noted that the optical imaging device may also use other combination manners to arrange the reflection element 630 and the image source element 610 . 1 , one end of the reflective element 130 is not attached to one end of the light splitting element 120, for example, a non-light-transmitting bracket may be provided between the reflecting element 130 and the light splitting element 120 to connect. At this time, one end of the absorption element may also be attached to the end of the light splitting element away from the image source element or the end of the reflection element away from the image source element, which is not limited herein. However, no matter what arrangement is adopted, the absorbing element 640 should be able to absorb the stray light in the first light region and pass through the real scene light in the second light region.

In addition, the thickness of the absorbing element 640 can also be adjusted according to the needs of the scene. In one example of this specification, the thickness of the absorbing element 640 is 0.5 mm to 5 mm.

FIG. 7 shows a schematic structural diagram of an example of a head-mounted display device according to an embodiment of the present specification.

As shown in FIG. 7 , the head-mounted display device 700 includes an optical imaging device and an absorbing element 740, and the optical imaging device includes an image source element 710, a light splitting element 720 and a reflecting element 730 aligned with the optical path. In one example of the present specification, the absorbing element 740 includes a substrate 741 and a plurality of absorbing structures 742, each absorbing structure 742 is arranged at intervals in sequence, and the substrate can be transparent, and is covered by the area determined by the image position of the human eye and each absorbing structure At least a part of the first ray area, and the area determined by the human eye position E and at least one gap covers the real scene ray of the second ray area, where the gap is formed by the interval between adjacent absorbing structures. Further, the arrangement position of the substrate 741 is such that the substrate 741 transmits the light of the real scene.

FIG. 8 shows a schematic structural diagram of an example of an absorbing element according to an embodiment of the present specification.

As shown in FIG. 8 , the base 741 of the absorption element 740 is a plane structure, and the base plane may have an included angle γ with the main optical axis. In FIG. 7 , the base 741 of the absorption element may also be parallel to the main optical axis. This can be unlimited. In addition, each absorption structure 742 in the absorption element 740 has an included angle β with the main optical axis, and by arranging or adjusting the included angle β and the gap size of each absorption structure 742, stray light in the first light region can be absorbed, and Real scene ray passing through the second ray zone.

Specifically, each absorption structure 742 is used for absorbing light, and each absorption structure can form a light-shielding area for the image position E' of the human eye, and the light-shielding area corresponding to the adjacent absorption structures 742 is partially overlapped or just joined , and the light-shielding regions corresponding to the respective absorption structures 742 are combined to cover the first light region. Referring to the example in FIG. 8 , determined by the first ends (eg, ends) of the adjacent first absorbent structures and the second ends (eg, head ends) of the second absorbent structures in the sequentially spaced absorbent structures The light-absorbing bonding region 810 passes through the image position of the human eye, so that the light-shielding regions corresponding to the respective absorbing structures can cover (or just cover) the first light region after being combined. Here, the first end of the first absorbent structure and the second end of the second absorbent structure are close to each other, and the second end of the first absorbent structure and the first end of the second absorbent structure are far away from each other.

In addition, each gap between adjacent absorbing structures 742 can each form a light-transmitting region for the position E of the human eye, and the light-transmitting regions corresponding to the adjacent gaps are partially overlapped or just joined, and the corresponding light-transmitting regions of each gap The light-transmitting area is combined to cover the second light-transmitting area. Referring to the example in FIG. 8 , the plane on which each absorbing structure 742 is located passes through the position E of the human eye, so that the plane on which each absorbing structure 742 is located just coincides with the direction of the line of sight of the human eye without blocking the user’s field of vision, and each gap corresponds to the position E of the human eye. Each light-transmitting area can just cover the second light area after being combined.

In an example of this specification, the inclination angle of each absorption structure relative to the main optical axis of the optical imaging device is within the line-of-sight angle range. Referring to the example in FIG. 8 , the β corresponding to each absorption structure is within the line-of-sight angle range inside. As described above, the minimum line-of-sight angle in the line-of-sight angle range is determined by the position of the human eye and the end of the beam splitter element away from the image source element (eg, 404 in FIG. 4B ), the maximum line-of-sight angle in the line-of-sight angle range is determined by the position of the human eye and the viewing angle of the human eye (eg, 403 in Figure 4B). Therefore, it can be ensured that the light radiated from each gap is the light in the direction of the line of sight of the human eye.

It should be noted that, the thickness d and the length L of the substrate 741 in the embodiments of the present specification may vary with different application scenarios. In one example of the present specification, the thickness d of the base 741 may be between 0.1 mm and 10 mm, and the length L of the base 741 may be between 2 mm and 40 mm.

FIG. 9 shows a schematic structural diagram of an example of an absorbing element according to an embodiment of the present specification.

As shown in FIG. 9 , each of the included angles β between the planes where the absorption structures 742 are located in the absorption element 740 and the main optical axis R are equal to each other, that is, the planes where the absorption structures are located are parallel to each other. It should be noted that, in order to transmit the real scene light in the second light region while absorbing the stray light in the first light region, the separation distance between the absorption structures 742 in the absorption element 740 can be diversified. Alternatively, for example, the connecting line between the two ends of the adjacent absorbing structures that are close to each other may pass through the image position of the human eye. In addition, the substrate of the absorbing element 740 can also be selected in other non-planar shapes (for example, a curved or concave substrate can be used), so that the real scene in the second light region can be seen through the position of the human eye.

In one example of the present specification, the head-mounted display device further includes an optical path correction element (not shown), and the optical path correction element may be configured by at least one lens assembly and/or reflection assembly. Furthermore, the structure of the optical path correction element and the arrangement position in the optical imaging device enable the optical path correction element to propagate the light rays passing through each gap (eg, parallel transmission) to the position of the human eye. It should be understood that when the parameters such as the arrangement angle, size and spacing of each absorption structure change, the structure and arrangement position of the optical path correction element may also need to be adjusted accordingly, and the optical path correction element can also be configured to have multiple The optical path correction structure arranged in sequence, therefore, may not limit the specific structure and arrangement position of the optical path correction element.

As examples of absorbent elements as described in Figures 7-9, the various absorbent structures may be embedded in the substrate. Alternatively, each absorbent structure 742 in the absorbent element 740 may also be attached to the surface of the substrate 741.

10A-10D respectively show schematic structural diagrams of different examples of absorbing elements according to embodiments of the present specification.

As shown in FIG. 10A, the respective absorbent structures 742 are attached to the upper surface of the substrate 741, and the respective absorbent structures are parallel to each other. As shown in FIG. 10B, the respective absorbent structures 742 are attached to the lower surface of the substrate 741, and the respective absorbent structures are parallel to each other. As shown in FIG. 10C, each absorbent structure 742 is attached to the upper surface of the substrate 741, and the absorbent structures 842 are not parallel, eg, can pass the position of the human eye. As shown in FIG. 10D, the respective absorbent structures 742 are attached to the lower surface of the substrate 741, and the absorbent structures 742 are not parallel. Here, the various absorbent structures may take various heights, and in one example, the height of the absorbent structure may be between 0.2mm and 20mm, the thickness of the absorbent structure may be between 0.01mm and 5mm, and the thickness of the substrate may be between 0.1mm and 20mm. 10mm.

In addition, each absorption structure may also use a light absorption coating (not shown) to achieve a light absorption function, for example, the light absorption coating is attached to the absorption structure 742 . In an example of the present specification, a line connecting two ends of adjacent light-absorbing coatings that are close to each other passes through the image position of the human eye, and the extension of each light-absorbing coating passes through the position of the human eye. Here, the absorption band of the light-absorbing coating may include the entire visible light band to absorb visible light.

In some embodiments, each of the absorption structures 742 in FIGS. 7-10D is also formed as a microstructure array distribution, and the absorption elements may employ holographic optical elements or surface relief gratings, or the like.

FIG. 11 shows a schematic structural diagram of an example of a head-mounted display device according to an embodiment of the present specification.

As shown in FIG. 11 , the head-mounted display device 1100 includes an optical imaging device and an absorption element 1140 , and the optical imaging device includes an image source element 1110 , a light splitting element 1120 and a reflection element 1130 aligned with the optical path. Here, the absorption member 1140 is formed in a recessed structure, and may not be limited to a planar structure.

It should be noted that the elements and the structures and arrangements of the elements in the optical imaging device shown in the above figures are only used as examples, and more other elements or structures not listed here can also be used to supplement. In an example of this specification, the image source element may further include an aberration corrector (not shown), so as to correct the aberration in the optical imaging device together with the spectroscopic element and the reflection element, which is more helpful to improve the imaging quality. Specifically, the aberration corrector can use a lens component to reduce the light emission angle of the pixels on the image source element, which is more conducive to blocking stray light under the head-mounted display device, and improves the user's experience when wearing it.

In addition, the optical path design methods described above in conjunction with the accompanying drawings can also be adjusted, for example, the optical path design methods such as Birdbath and free-form surface prisms can be used, which should not be limited here.

It should be understood by those skilled in the art that various variations and modifications can be made to the various embodiments described above without departing from the essence of the present invention. Therefore, the protection scope of the present invention should be defined by the appended claims.

The detailed description set forth above in connection with the accompanying drawings describes exemplary embodiments and does not represent all embodiments that may be implemented or fall within the scope of the claims. The term "exemplary" as used throughout this specification means "serving as an example, instance, or illustration" and does not mean "preferred" or "advantage" over other embodiments. The detailed description includes specific details for the purpose of providing an understanding of the described technology. However, these techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described embodiments.

The above description of the present disclosure is provided to enable any person of ordinary skill in the art to make or use the present disclosure. Various modifications to this disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of this disclosure . Thus, the present disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (16)

1. A head-mounted display device, comprising: an optical imaging device, comprising an image source element, a beam splitter element, and a reflective element configured for optical path alignment; The absorption element, the structure of the absorption element and the arrangement position in the optical imaging device make the absorption element absorb at least part of the stray light in the first light region, and pass the real scene light in the second light region, so The first light region is determined by the image position of the human eye and the two ends of the light splitting element, and the second light region is determined by the position of the human eye and the viewing angle of the human eye and the distance of the light splitting element away from the image source element. The angle of view of the human eye includes 70°, and the image position of the human eye is the mirror symmetry point of the position of the human eye with respect to the light splitting element. 2. The head-mounted display device of claim 1, wherein the absorbing element comprises a substrate and a plurality of absorbing structures, each of the absorbing structures being arranged in a sequence spaced apart, The area defined by the eye position and each of the absorbing structures covers at least a part of the first light area, and the area defined by the eye position and at least one gap covers the second light area , where the gap is formed by the spacing between adjacent absorbing structures; The substrate is arranged so that the substrate transmits the real scene light. 3. The head-mounted display device according to claim 1, wherein the plane on which the absorption element is located passes through the position of the human eye and the end of the light splitting element remote from the image source element, and The area determined by the image position of the human eye and the two ends of the absorbing element covers the first light area. 4. The head-mounted display device according to claim 2, wherein the inclination angle of each absorption structure relative to the main optical axis of the optical imaging device is within a line of sight angle range, The minimum line-of-sight angle in the line-of-sight angle range is determined by the position of the human eye and the end of the light splitting element away from the image source element, and the maximum line-of-sight angle in the line-of-sight angle range is determined by the The position of the human eye and the viewing angle of the human eye are determined. 5 . The head-mounted display device according to claim 2 , wherein the first end of the first absorbing structure and the second end of the second absorbing structure are adjacent to each other of the respective absorbing structures arranged at intervals in sequence. 6 . The determined light absorbing bonding area passes through the eyeglass image position, the first end of the first absorbing structure and the second end of the second absorbing structure are close to each other, and the second end of the first absorbing structure is close to each other. The first ends of the second absorbent structure are spaced away from each other. 6 . The head-mounted display device of claim 2 , wherein the plane on which the respective absorbing structures are located passes through the position of the human eye. 7 . 7. The head-mounted display device according to claim 2, wherein the planes on which the respective absorbing structures are located are parallel to each other. 8. The head-mounted display device according to claim 2 or 7, further comprising an optical path correction element, the structure of the optical path correction element and the arrangement position in the optical imaging device make the optical path correction element The light transmitted through each of the gaps propagates to the position of the human eye. 9. The head mounted display device of claim 2, wherein the respective absorbent structures are attached to a surface of the substrate. 10. The head mounted display device of claim 2, wherein the respective absorbent structures are embedded in the substrate. 11. The head mounted display device of claim 2, wherein the respective absorbing structures are formed as a microstructure array distribution. 12. The head mounted display device of claim 2, wherein the absorbing element is formed as a planar structure or a recessed structure. 13. The head mounted display device of claim 2 or 12, wherein the absorbing structure comprises a light absorbing coating. 14. The head-mounted display device of claim 13, wherein the absorption band of the light-absorbing coating includes the entire visible light band. 15. The head mounted display device of claim 1, wherein one end of the absorption element is attached to an end of the light splitting element away from the image source element and/or an end of the reflective element away from all reflective elements. one end of the image source element. 16. The head mounted display device of claim 1, wherein the image source element comprises an aberration corrector.

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