CN213544964U - Head-mounted display device - Google Patents
Head-mounted display device Download PDFInfo
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- CN213544964U CN213544964U CN202022921023.XU CN202022921023U CN213544964U CN 213544964 U CN213544964 U CN 213544964U CN 202022921023 U CN202022921023 U CN 202022921023U CN 213544964 U CN213544964 U CN 213544964U
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Abstract
The utility model discloses a head-mounted display device, which comprises a display screen and a light angle adjusting structure, wherein the light angle adjusting structure is used for limiting the angle of emergent light of the display screen; the light angle adjusting structure includes: the transparent substrate layer, the light absorption component and the transparent protective layer are sequentially arranged along the direction far away from the display screen; the light absorption component comprises a plurality of light absorption pieces, the light absorption pieces are arranged between the transparent substrate layer and the transparent protective layer, and the light absorption pieces are arranged at intervals to absorb part of light emitted by the display screen. The technical scheme of the utility model can reduce the exit angle of light, reduce stray light's appearance.
Description
Technical Field
The utility model relates to an optics product technical field especially relates to a wear display device.
Background
A Head Mounted Display (Head Mounted Display) is an electronic product capable of providing a user with an immersive experience, wherein Display principles include Virtual Reality (visual Reality) technology, Augmented Reality (Augmented Reality) technology, and Mixed Reality (Mixed Reality) technology.
LCD, OLED or micro OLED are the most common choices in near eye display (ned) or head mounted display (hmd) optical systems based on display screens, and these display screens are usually selected from display screens with conventional viewing angle characteristics, such as LCD, whose viewing angle is usually greater than 60 ° or even up to 80 °, and OLED has a larger viewing angle range due to the absence of polarization light leakage of LCD.
When these large-viewing-angle display screens are applied to a head-mounted display device, due to the limitation of the optical expansion of the system, large-viewing-angle light often cannot enter the system and finally reaches human eyes. In particular, these rays typically affect imaging quality in the form of stray light. At present, common stray light inhibiting means such as ink coating and the like can bring certain improvement, however, the part which finally reaches human eyes through the refraction and reflection of the lens cannot be effectively inhibited, and the stray light influences the watching effect of a user.
SUMMERY OF THE UTILITY MODEL
Therefore, the emergent angle of the light rays of the display screen is large, and partial light rays often cannot enter the head-mounted display device to finally reach human eyes, but reach the human eyes through the reflection of the lens to form stray light to influence the watching effect of a user.
In order to achieve the above object, the present invention provides a head-mounted display device, which includes a display screen and a light angle adjusting structure, wherein the light angle adjusting structure is used for limiting the angle of the emergent light of the display screen;
the light angle adjusting structure includes: the transparent substrate layer, the light absorption component and the transparent protective layer are sequentially arranged along the direction far away from the display screen;
the light absorption component comprises a plurality of light absorption pieces, the light absorption pieces are arranged between the transparent substrate layer and the transparent protective layer, and the light absorption pieces are arranged at intervals to absorb part of light emitted by the display screen.
Optionally, a plurality of the light absorbing members are arranged at equal intervals.
Optionally, the light absorbing component includes a transparent medium layer, and the transparent medium layer is disposed between the light absorbing members.
Optionally, a plurality of the light absorbing elements include a trench structure, and the trench structure is filled with a light absorbing material.
Optionally, the light absorbing member extends from the transparent substrate layer to the transparent protective layer, an extending depth of the light absorbing member is defined as H, and a spacing width between two adjacent light absorbing members is defined as W, and then a ratio of the extending depth to the spacing width is determined according to a light exit angle of the light angle adjusting structure, an air refractive index, a cross-sectional shape of the light absorbing member, and a refractive index of a light absorbing material filled in the light absorbing member.
Optionally, the cross-sectional shape of the light absorbing member includes a symmetrical shape and an asymmetrical shape.
Optionally, the cross-sectional shape of the light absorbing member is rectangular, trapezoidal, triangular or a symmetrical shape with a conic section at the top end.
Optionally, the light absorbing member has a rectangular cross-sectional shape, and the extension depth H and the interval width W satisfy:
Optionally, when the cross-sectional shape of the light absorbing member is asymmetric, an included angle between a light ray emitted from the transparent substrate layer to the transparent protective layer and an interface normal includes a first included angle and a second included angle, and the first included angle is defined as θ1The second included angle is theta2Then satisfy theta1≠θ2。
Optionally, the structures of a plurality of the light absorbing members are the same.
The utility model provides an among the technical scheme, display screen sends light, and light directive light angular adjustment structure, light are jeted into by transparent stratum basale, jet out at transparent protective layer. A plurality of light absorbing pieces are arranged between the transparent substrate layer and the transparent protective layer, and when light rays pass through the light absorbing pieces, part of the light rays are absorbed by the light absorbing pieces and cannot be continuously diffused. That is to say, the light can only pass through along the interval position between the light-absorbing pieces, and the propagation visual angle cannot be enlarged, thereby forming a smaller light emergent angle. Therefore, the picture observed by the user is formed by the light rays passing through the light absorbing component, and the light rays in the part are limited by the light absorbing component and have a small divergence angle. Therefore, the light angle is limited by the light angle adjusting structure, the phenomenon that the large-angle divergent light penetrates through the lens to be reflected or scattered by the structural member to generate stray light is avoided, and the picture watching effect of a user is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural view of an embodiment of a light angle adjusting structure according to the present invention;
FIG. 2 is a schematic structural diagram of a first embodiment of a light absorbing assembly according to the present invention;
FIG. 3 is a schematic structural diagram of a second embodiment of a light absorbing assembly according to the present invention;
fig. 4 is a schematic structural diagram of a third embodiment of the light absorbing assembly of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | |
310 | Light absorbing member |
| 20 | Transparent |
40 | |
| 30 | Light absorbing component |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.
When a user uses the head-mounted display device, human eyes are close to the head-mounted display device, and a display picture inside the head-mounted display device is watched through the lens. However, since the range of motion of human eyes is limited, a part of light cannot enter human eyes in a wide range of viewing angles, thereby causing a lack of images on a display screen viewed by a user.
In order to solve the above problem, it is shown with reference to fig. 1 that the utility model provides a wear display device, wear display device includes display screen and light angular adjustment structure, display screen emission, and light angular adjustment structure is used for restricting the angle of display screen outgoing light, and wear display device's demonstration principle includes one of virtual reality technique, augmented reality technique and mixed reality technique. The light angle adjusting structure includes: a transparent substrate layer 10, a light absorbing member 30 and a transparent protective layer 20 arranged in that order in a direction away from the display screen. The light absorbing component 30 is arranged between the transparent substrate layer 10 and the transparent protective layer 20.
Wherein, the display screen is a conventional display screen with a large viewing angle, such as an LCD, an OLED or a microOLED. The light angle adjusting structure is used for being installed inside the head-mounted display device, and the light angle adjusting structure is installed in the light emitting direction of the display screen. For example, the transparent base layer 10 may be an eyepiece of a head mounted display device.
The transparent substrate layer 10 has an incident surface and an emergent surface opposite to the incident surface, and the light ray 40 enters through the incident surface of the transparent substrate layer 10 and exits through the emergent surface of the transparent substrate layer 10. The transparent protective layer 20 is arranged on one side of the light-emitting surface of the transparent substrate layer 10; light rays 40 that pass through transparent base layer 10 continue to travel forward and through transparent protective layer 20. The transparent substrate layer 10 and the transparent protection layer 20 may be made of optical glass or resin materials, such as PC, PMMA, TAC, and COP. The optical glass can obtain better optical transmittance, and the resin optical device can reduce the production cost and is easy to process.
The light absorbing assembly 30 includes a plurality of light absorbing members 310, the light absorbing members 310 are disposed between the transparent substrate layer 10 and the transparent protective layer 20, and the light absorbing members 310 are spaced apart from each other to absorb a portion of light emitted from the display screen. It will be appreciated that the transparent substrate layer 10 and the transparent protective layer 20 provide an installation space for installing the light absorbing member 30, and the light absorbing member 30 can be effectively protected by the transparent substrate layer 10 and the transparent protective layer 20. The light rays 40 are absorbed by the light absorbing member 30, whereby the light rays 40 can only propagate through the spaced passages between the light absorbing members 310, thereby obtaining a narrow light exit angle. Through light-absorbing member 310, can absorb the light that can not get into people's eye to thereby avoid this part light to pass through the lens and roll over and reflect and arouse the ghost phenomenon, consequently through light angle adjustment structure, can effectively eliminate the ghost phenomenon of wearing display device, promote image display quality.
In the technical solution proposed in this embodiment, the light 40 is incident from the transparent substrate layer 10 and exits from the transparent protective layer 20. A plurality of light absorbing pieces 310 are arranged between the transparent substrate layer 10 and the transparent protective layer 20, when the light 40 passes through the channel between the light absorbing pieces 310, after the light 40 meets the light absorbing pieces 310, part of the light 40 is absorbed and cannot be diffused continuously. That is, the light 40 can only pass through the channels between the light absorbing members 310, and the propagation viewing angle cannot be enlarged, thereby forming a smaller exit angle of the light 40. Therefore, the picture observed by the user is formed by the light rays 40 passing through the channel of the light absorbing member 310, and the light rays 40 of the part are limited by the light absorbing member 310, so that the light absorbing member has a smaller divergence angle, the phenomenon that the wide-angle divergent light rays are refracted through the lens or scattered by the structural member to generate stray light is avoided, and the picture watching effect of the user is improved.
In one embodiment of the present application, the light-absorbing members 310 are spaced at equal intervals to ensure uniformity of the light 40. That is to say, the width of the channels is the same, and thus the number of the light beams 40 passing through the channels is the same, so as to reduce the situation that the number of the partial light beams 40 is large and the number of the partial light beams 40 is small, and further avoid the local position of the whole display screen from being too bright or too dim.
In one embodiment of the present application, the light absorbing member 30 includes transparent dielectric layers disposed between the light absorbing members 310. Since the light absorbing members 310 are provided with a plurality of light absorbing members 310, that is, the channels formed between the light absorbing members 310 also include a plurality of light absorbing members, and transparent medium layers can be arranged in the plurality of light absorbing members, so that the light 40 can be transmitted smoothly. The transparent medium layers in each channel are made of the same material, so that the consistency of the transmission effect of the light 40 is ensured. The transparent medium layer may be air.
Furthermore, the transparent medium layer can also be a real object with a certain fixed thickness shape, and the light-absorbing pieces 310 can be effectively isolated through the transparent medium layer, so that a sufficient distance is kept between the light-absorbing pieces 310.
In one embodiment of the present application, the light absorbers 310 include a trench structure filled with a light absorbing material. The light absorbing material is capable of absorbing the light 40 and reducing the reflection of the light 40. The exit angle of the light ray 40 is reduced by the light absorption action of the light absorbing member 310. For example, the light absorbing material includes carbon black. In addition, the light absorption material absorbs the light 40, so that the light 40 is prevented from being mixed with each other to influence the viewing effect.
In one embodiment of the present application, the light absorbing member 310 extends from the transparent substrate layer 10 to the transparent protective layer 20, the extending distance of the light absorbing member 310 is defined as H, and the distance between two adjacent light absorbing members 310 is defined as W, and then the ratio of the extending depth to the interval width is determined according to the light exit angle of the light angle adjusting structure, the air refractive index, the cross-sectional shape of the light absorbing member, and the refractive index of the light absorbing material filled in the light absorbing member.
In one embodiment of the present application, the cross-sectional shape of the light absorbing member includes a symmetrical shape and an asymmetrical shape. The cross section of the light absorbing member means a section formed along a light propagation distance. The symmetrical shape enables the angle at which the light absorbing member emits light to remain consistent.
The cross section of the light absorbing piece can be asymmetrical, the light absorbing piece is asymmetrical, and the light emitting position is more flexible, so that a user can conveniently adjust the light absorbing piece according to the design requirement. Such as a cross-sectional shape of a rectangle, trapezoid, triangle, or a symmetrical shape with a conic section at the tip. The shape of the light-absorbing piece can be selected in various ways, the symmetrical shape is convenient to process, the shape selection of the light-absorbing piece is not limited to the limitation, and the symmetrical shape can ensure that the emergent angles of the light rays are the same and is within the protection scope of the application.
When the cross section of the light absorbing part is rectangular, the extension depth H and the interval width W satisfy:
It should be noted that the cross-sectional shape of the light absorbing member can be other symmetrical shapes, for example, as shown in fig. 2, in another embodiment of the present application, the cross-sectional area of the light absorbing member 310 is gradually decreased from the transparent substrate layer 10 to the transparent protective layer 20.
When the cross-sectional shape of the light absorbing member is asymmetric, for example, referring to fig. 3, in one embodiment of the present application, the angle between the light 40 emitted from the transparent substrate layer 10 to the transparent protective layer 20 and the normal of the interface includes a first angle and a second angle, and the first angle is defined as θ1The second included angle is theta2Then satisfy theta1≠θ2. It can be said that the adjacent two light absorbing members 310 are asymmetrically disposed, thereby formingThe first included angle and the second included angle that angle numerical value is different through this kind of design, can adjust the emergent angle of light 40 in a flexible way.
In the above embodiment, in order to ensure the consistency of the shielding effect and avoid the display screen at a part of the display screen from being too bright, the external structures of the light absorbing members 310 are the same. The light absorbing members 310 have the same shape and structure, and are convenient to manufacture and process. For example, referring to FIG. 4, the light absorbing members 310 have equal cross-sectional areas in a direction from the transparent substrate layer 10 toward the transparent protective layer 20. To facilitate the fabrication of the light absorbing members 310, each light absorbing member 310 may be sized and shaped to provide a uniform structure. For example, the light absorbing member 310 is designed to be a cylindrical structure, so that the light absorbing member 310 has a simple shape and structure and is easy to process.
The above is only the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all of which are in the utility model discloses a conceive, utilize the equivalent structure transform that the content of the specification and the attached drawings did, or directly/indirectly use all to include in other relevant technical fields the patent protection scope of the present invention.
Claims (10)
1. A head-mounted display device is characterized by comprising a display screen and a light ray angle adjusting structure, wherein the light ray angle adjusting structure is used for limiting the angle of emergent light rays of the display screen;
the light angle adjusting structure includes: the transparent substrate layer, the light absorption component and the transparent protective layer are sequentially arranged along the direction far away from the display screen;
the light absorption component comprises a plurality of light absorption pieces, the light absorption pieces are arranged between the transparent substrate layer and the transparent protective layer, and the light absorption pieces are arranged at intervals to absorb part of light emitted by the display screen.
2. The head-mounted display device of claim 1, wherein the light-absorbing members are equally spaced apart.
3. The head-mounted display device of claim 1, wherein the light absorbing component comprises a transparent dielectric layer disposed between the light absorbing members.
4. A head-mounted display device as recited in any of claims 1 through 3, wherein the light absorbing elements comprise a trench structure filled with a light absorbing material.
5. The head-mounted display device according to claim 4, wherein the light-absorbing member extends from the transparent substrate layer to the transparent protection layer, an extending depth of the light-absorbing member is defined as H, a space width between two adjacent light-absorbing members is defined as W, and a ratio of the extending depth to the space width is determined according to a light exit angle of the light angle adjusting structure, an air refractive index, a cross-sectional shape of the light-absorbing member, and a refractive index of a light-absorbing material filled in the light-absorbing member.
6. The head-mounted display device of claim 5, wherein the cross-sectional shape of the light-absorbing member comprises a symmetric shape and an asymmetric shape.
7. The head-mounted display device of claim 6, wherein the light-absorbing member has a cross-sectional shape of a rectangle, a trapezoid, a triangle, or a symmetrical shape having a conic section at its apex.
8. The head-mounted display device according to claim 7, wherein the light absorbing member has a rectangular cross-sectional shape, and the extended depth H and the space width W satisfy:
9. The head-mounted display device of claim 6, wherein when the cross-sectional shape of the light absorbing member is asymmetric, the included angle between the light emitted from the transparent substrate layer to the transparent protective layer and the normal of the interface comprises a first included angle and a second included angle, and the first included angle is defined as θ1The second included angle is theta2Then satisfy theta1≠θ2。
10. A head-mounted display device as claimed in any one of claims 1 to 3, wherein a plurality of the light-absorbing members are identical in structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022921023.XU CN213544964U (en) | 2020-12-08 | 2020-12-08 | Head-mounted display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022921023.XU CN213544964U (en) | 2020-12-08 | 2020-12-08 | Head-mounted display device |
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| CN213544964U true CN213544964U (en) | 2021-06-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115359732A (en) * | 2022-08-26 | 2022-11-18 | 深圳康佳电子科技有限公司 | Micro LED protection film, micro LED structure, display device and electronic equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115359732A (en) * | 2022-08-26 | 2022-11-18 | 深圳康佳电子科技有限公司 | Micro LED protection film, micro LED structure, display device and electronic equipment |
| CN115359732B (en) * | 2022-08-26 | 2024-03-12 | 深圳康佳电子科技有限公司 | Micro LED protection film, micro LED structure, display device and electronic equipment |
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