CN217467351U - Near-to-eye display optical system and head-mounted display equipment - Google Patents
Near-to-eye display optical system and head-mounted display equipment Download PDFInfo
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- CN217467351U CN217467351U CN202221339569.7U CN202221339569U CN217467351U CN 217467351 U CN217467351 U CN 217467351U CN 202221339569 U CN202221339569 U CN 202221339569U CN 217467351 U CN217467351 U CN 217467351U
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Abstract
The utility model provides a near-to-eye display optical system and head-mounted display device, wherein, this near-to-eye display optical system includes: a display and an optical element; the optical element includes: the edge super lens array is arranged around the central super lens and is connected with the central super lens; the central super lens is opposite to the central area of the display and is used for forming an enlarged virtual image of the central area on the side, far away from the optical element, of the display; the edge super lens array is opposite to the edge area of the display and is used for enabling the image of the edge area to form an enlarged virtual image of the edge area on the side, far away from the optical element, of the display. Through the embodiment of the utility model provides a near-to-eye display optical system and head-mounted display device need not consider the super lens in central authorities and the super lens array's in edge alignment encapsulation problem, have possessed the advantage that the quality is light, whole thickness is thin, the system is simple, the price is lower and the productivity is high.
Description
Technical Field
The utility model relates to a super surface application technology field particularly, relates to a nearly eye shows optical system and head-mounted display device.
Background
Virtual Reality (VR) technology has a wide application value in many fields such as military, medical treatment, entertainment, and education by creating a three-dimensional simulation environment with experience. A simple near-to-eye display optical system based on binocular vision mainly comprises: an optical element and a display; in the case where a single lens is used as the optical element, the optical element serving as the magnifying lens needs to have a long optical path in order to achieve the effect of a large angle of view. Such a structure results in a bulky near-eye display optical system, which is not compact enough between devices.
At present, a structure combining a central lens and an edge microlens can be adopted, so that an image of an edge region of the display (such as an image of the edge region which cannot be projected by the central lens) can be projected by the edge microlens, and the purpose of auxiliary expansion of a field angle can be achieved; however, when the central lens and the edge microlens are packaged together, alignment needs to be considered, which is difficult to process and thick.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, an object of the embodiments of the present invention is to provide a near-eye display optical system and a head-mounted display device.
In a first aspect, embodiments of the present invention provide a near-eye display optical system, a display and an optical element, where the optical element is disposed on a side of the display where the display can display an image; the optical element includes: the edge super lens array is arranged around the central super lens and is connected with the central super lens; the edge superlens array comprises a plurality of edge superlenses; the central super lens is opposite to a central area of the display and is used for forming an image of the central area into an enlarged virtual image of the central area on the side, far away from the optical element, of the display; the edge super lens array is opposite to the edge area of the display and used for enabling the image of the edge area to form an enlarged virtual image of the edge area on the side, far away from the optical element, of the display.
Optionally, the edge superlens is a ring structure.
Optionally, the edge superlens array is a close-packed structure.
Optionally, the size of the central superlens is larger than the size of the edge superlens.
Optionally, the focal length of the central superlens is the same as the focal length of the edge superlens.
Optionally, the display comprises: a light emitting diode display, an organic light emitting diode display, a silicon based liquid crystal display, a digital micromirror device, or a mems based laser beam scanning display.
Optionally, the central superlens and the edge superlens share a same substrate.
Optionally, the central superlens and the edge superlens each comprise: the super-surface nano structure comprises a super-surface nano structure and a filling material filled around the super-surface nano structure, wherein the filling material is a transparent or semitransparent material in an operating waveband, and the absolute value of the difference between the refractive index of the filling material and the refractive index of the super-surface nano structure is greater than or equal to 0.5.
In a second aspect, the present invention further provides a head-mounted display apparatus, including any one of the above near-eye display optical systems and the support housing; the near-eye display optical system is arranged inside the support shell, and the support shell is used for fixing the near-eye display optical system.
Optionally, the head-mounted display device further comprises: a securing strap for connection with the support housing and forming an annular structure that enables a user to wear on the head.
The embodiment of the utility model provides an in the above-mentioned scheme that the first aspect provided, adopt the super lens in central authorities and the super lens array in edge structure that is connected as optical element, can directly adopt semiconductor lithography technology single exposure to accomplish in the course of working, need not consider the super lens in central authorities and the super lens array in edge's alignment and encapsulation problem, and for the microlens array, this near-to-eye display optical system has still possessed the advantage that the quality is light, whole thickness is thin, the system is simple, the price is lower and the productivity is high.
The embodiment of the utility model provides an in the scheme that above-mentioned second aspect provided, adopt more slender near-to-eye display optical system, can make whole head-mounted display device's structure more frivolous compact, it is higher to wear the comfort level.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 these drawings without creative efforts.
Fig. 1 illustrates a side view of a near-eye display optical system provided by an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating the size of the corresponding field angle in the near-eye display optical system provided by the embodiment of the present invention, in the case of only including a central superlens;
fig. 3 is a schematic diagram illustrating the sizes of the corresponding viewing angles in the near-eye display optical system provided by the embodiment of the present invention in the case of including the central superlens and the edge superlens array;
fig. 4 is a schematic diagram illustrating an edge superlens array in a ring structure in a near-eye display optical system according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating an edge superlens array in a plurality of annular structures in a near-eye display optical system according to an embodiment of the present invention;
fig. 6 is a schematic diagram illustrating an edge superlens array formed by a plurality of regular hexagonal edge superlenses in a near-eye display optical system according to an embodiment of the present invention;
fig. 7 is a schematic diagram illustrating an edge superlens array formed by a plurality of square edge superlenses in a near-eye display optical system according to an embodiment of the present invention;
fig. 8 shows a schematic structural diagram of a head-mounted display device provided by an embodiment of the present invention.
Icon:
1-near-to-eye display optics, 2-support housing, 3-fixation band, 11-display, 12-optics, 121-central superlens, 122-edge superlens array, 1222-edge superlens.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The embodiment of the utility model provides a near-to-eye display optical system, it is shown with reference to fig. 1, fig. 1 is this near-to-eye display optical system's side view, and this near-to-eye display optical system includes: a display 11 and an optical element 12, the optical element 12 being arranged on a side of the display 11 where an image can be displayed, the optical element 12 being located on a lower side of the display 11 as shown in fig. 1. The optical element 12 includes: a central super lens 121 and an edge super lens array 122 arranged in a coplanar manner, wherein the edge super lens array 122 is arranged around the central super lens 121 and connected with the central super lens 121; the edge superlens array 122 includes a plurality of edge superlenses 1222; the central superlens 121 is opposite to the central region of the display 11, and is used for forming an image of the central region into an enlarged virtual image of the central region on the side of the display 11 far away from the optical element 12; the edge superlens array 122 is opposite to the edge region of the display 11, and is used for forming an enlarged virtual image of the edge region on the side of the display 11 far away from the optical element 12.
In the near-to-eye display optical system provided by the embodiment of the present invention, the display 11 is used for displaying an image, and the displayed image is a real image, i.e. a real image; optionally, the display 11 comprises: a light emitting diode display, an organic light emitting diode display, a silicon-based liquid crystal display, a digital micromirror device, or a mems-based laser beam scanning display; the whole structure of the displays is small, the displays belong to micro-displays and are more suitable for the near-eye display optical system. In the embodiment of the present invention, the image displayed by the display 11 can be enlarged into a virtual image, i.e. a virtual image, on the side of the display 11 away from the optical element 12 (e.g. the side failing to display the image) by the modulation of the optical element 12. Wherein the optical element 12 comprises a central superlens 121 and an edge superlens array 122; the central superlens 121 is located at the center of the edge superlens array 122, and is surrounded by the edge superlens array 122, and the central superlens 121 and the edge superlens array 122 are arranged in a plane, wherein the edge superlens array 122 includes a plurality of edge superlenses 1222 arranged in a coplanar connection manner.
In the embodiment of the present invention, the central super-lens 121 and the edge super-lens array 122 correspond to the central area and the edge area of the display 11, respectively, the central area of the display 11 may be a circular area using the center of the display 11 as a circular dot, or a rectangle using the center of the display 11 as an intersection of central lines in two directions perpendicular to each other, and may be determined according to the shape of the central super-lens 121; accordingly, the other regions except the central region may be used as the edge regions of the display 11 and correspond to the edge super lens array 122. The central super lens 121 is capable of magnifying an image displayed in a corresponding central area of the display 11 to a virtual image of the central area on a side of the display 11 away from the optical element 12; accordingly, the edge super lens array 122 can enlarge the image displayed in the edge area corresponding to the edge super lens array in the display 11 into a virtual image of the edge area on the side of the display 11 away from the optical element 12. The embodiment of the utility model provides a through surpassing lens array 122 at the edge of coplane arrangement around lens 121 in the middle of, can enlarge this nearly eye display optical system's angle of vision. For example, as shown in fig. 2, in a case where the near-eye display optical system includes only the central superlens 121, the field angle FOV of the near-eye display optical system is small, and the field angle FOV satisfies the formula FOV of 2arctan (D/2 e). Where D represents the size of the central superlens 121, for example, in the case of the embodiment of the present invention for the angle of view in the horizontal direction, the size of the central superlens 121 may be its horizontal length (e.g., in the case of the central superlens 121 being circular, its horizontal length may be represented by a diameter); e is the exit pupil distance (i.e. the vertical distance between the superlens 121 and the human eye), and the exit pupil distance is smaller than the focal length of the superlens 121, i.e. e < f; in the case where the near-eye display optical system includes the central superlens 121 and the edge superlens array 122 is connected around the central superlens 121 in a coplanar manner, as shown in fig. 3, the field angle FOV (e.g., horizontal field angle) of the near-eye display optical system becomes large; for example, when the edge super lens array 122 is distributed around the center super lens 121, if N edge super lenses are present in the radial direction of the center super lens 121, the field angle FOV of the near-eye display optical system satisfies the formula FOV of 2arctan ((D + Nd)/2 e); wherein D represents the size of the central superlens 121, e.g., the horizontal length of the central superlens 121; e is the exit pupil distance (i.e. the vertical distance between the superlens 121 and the human eye), and the exit pupil distance is smaller than the focal length of the superlens 121, i.e. e < f; each edge superlens has a dimension d. Therefore, in the case that the edge super lens array 122 is coplanar connected around the central super lens 121, an image of the edge area of the display 11 (for example, an image of the edge area that cannot be projected by the central super lens 121) can be projected by the edge super lens array 122, so as to achieve the purpose of auxiliary expanding of the field angle, and further, images of different areas in the display 11 can be enlarged into virtual images and presented to human eyes.
Optionally, the size of the central superlens 121 is larger than the size of the edge superlens 1222. The sizes of the center superlens 121 and the edge superlens 1222 can be measured by respective diameters (e.g., corresponding diameters of the center superlens 121 and the edge superlens 1222 in case the center superlens 121 is circular and the edge superlens 1222 is circular), and can be a diagonal length or an area, etc., which can be determined according to the actual direction of the field angle to be enlarged. In the embodiment of the present invention, the size D of the central super lens 121 is larger than the size D of the edge super lens 1222, so that the characteristic that the viewing field difference of the central area of the display 11 is small can be utilized, and only one central super lens 121 needs to be aligned to the central area of the display 11, so as to amplify and present the image corresponding to the central area as a virtual image with high resolution, and at the same time, the number of the edge super lenses 1222 can be reduced, thereby reducing the design complexity of the optical element 2.
The embodiment of the utility model provides a near-to-eye display optical system adopts the super lens 121 of central authorities and the super lens array 122 structure that is connected of edge as optical element 2, can directly adopt semiconductor lithography process single exposure to accomplish in the course of working, need not consider the super lens 121 of central authorities and the super lens array 122's of edge alignment and encapsulation problem, and for microlens array, this near-to-eye display optical system has still possessed the quality light, whole thickness is thin, the system is simple, the price is lower and the advantage that the productivity is high.
Optionally, the edge superlens 1222 is a circular ring structure. In the embodiment of the present invention, the edge super lens 1222 of a ring structure may form the edge super lens array 122, as shown in fig. 4, fig. 4 is a front view of the edge super lens array 122 including the edge super lens 1222 of a ring structure; alternatively, the edge superlens array 122 may also include a plurality of edge superlenses 1222 of different sizes in a circular ring structure, and the edge superlens 1222 with the smallest radius may surround and connect the central superlens 121; referring to fig. 5, the edge super lenses 1222 in a circular ring structure are connected to form an edge super lens array 122 at the periphery of the central super lens 121 in a manner of surrounding and encircling each other from small to large. The embodiment of the utility model provides an adopt the edge super lens 1222 of ring structure, can cooperate for the central super lens 121 of circular structure with the design better to realize better encapsulation and the enlargeing to the angle of vision.
Optionally, the edge superlens array 122 is a close-packed structure. The edge super lenses 1222 included in the edge super lens array 122 may be various super lenses such as regular hexagon, square, or regular triangle, which can be connected to each other to form a close-packed structure, and the central super lens 121 may be tightly packed around the peripheral super lenses along the same plane regardless of the shape. As shown in fig. 6, fig. 6 shows an edge super lens array 122 having a close-packed structure of a plurality of regular hexagonal edge super lenses 1222; alternatively, as shown in FIG. 7, the edge superlens array 122 of the close-packed structure includes a plurality of square edge superlenses 1222. The embodiment of the utility model provides a only need make this edge super lens array 122 satisfy close-packed structure to coplane links to each other around the super lens 121 (like the rectangle) of central authorities of arbitrary shape, can assist and enlarge the angle of vision, makes optional edge super lens 1222 and central super lens 121's structure more abundant many, can adapt to actual demand and select specific central super lens 121 and edge super lens 1222, thereby reduces the encapsulation degree of difficulty.
Optionally, the focal length of the central superlens 121 is the same as the focal length of the edge superlens 1222. In order to enlarge and display a virtual image on the side of the display 11 away from the optical element 2, for example, a virtual image corresponding to the central region enlarged and formed by the central super lens 121 and a virtual image corresponding to the edge region enlarged and formed by the edge super lens 1222 can be in the same plane to form a complete enlarged virtual image of the display 11, the focal length of the central super lens 121 can be made to coincide with the focal length of the edge super lens 1222, that is, the distance (for example, the vertical distance) between the enlarged virtual image corresponding to the central region and the display 11 can be made to be the same, and the distance between the enlarged virtual image corresponding to the edge region and the display 11 can be made to be the same.
Optionally, the central superlens 121 and the edge superlens 1222 share the same substrate. In the near-eye display optical system provided by the embodiment of the present invention, the optical element 2 may be a unitary structure, for example, the central superlens 121 and the edge superlens 1222 included in the optical element 2 share the same substrate, and the central superlens 121 and the edge superlens 1222 are generated in corresponding regions of the substrate. Such a configuration can simplify the overall structure of the optical element 2 and avoid technical difficulties in splicing the central superlens 121 and the edge superlens 1222 of different substrates, such as alignment and packaging problems therebetween.
Optionally, the central superlens 121 and the edge superlens 1222 each include: the super-surface nano structure comprises a super-surface nano structure and a filling material filled around the super-surface nano structure, wherein the filling material is a transparent or semitransparent material in an operating waveband, and the absolute value of the difference between the refractive index of the filling material and the refractive index of the super-surface nano structure is greater than or equal to 0.5.
In the embodiment of the present invention, at the operating band of the near-to-eye display optical system, such as the visible light band, the central super lens 121 and the edge super lens 1222 are transparent, i.e. have high transmittance for the light of the operating band. The central superlens 121 and the edge superlens 1222 each include a super-surface nanostructure and a filling material filled around the super-surface nanostructure, and the filling material filled around the super-surface nanostructure is also a transparent or semitransparent material in the working wavelength band, i.e. the filling material has high transmittance or transmittance between 40% and 60% for light (such as visible light) in the working wavelength band, so as to protect the nano-scale super-surface nanostructure. The absolute value of the difference between the refractive index of the filling material and the refractive index of the super-surface nano structure is greater than or equal to 0.5, so that the filling material is prevented from influencing the light modulation effect.
The embodiment of the utility model provides a still provide a head-mounted display device, it is shown with reference to fig. 8, include: the above-described any one of the near-eye display optical system 1 and the support case 2; the near-eye display optical system 1 is provided inside a support case 2, and the support case 2 is used to fix the near-eye display optical system 1.
The embodiment of the utility model provides an among the head mounted display device, support casing 2 is used for showing optical system 1 encapsulation near the eye inside it, can fix and protect this near the eye and show optical system 1. The near-eye display optical system 1 can be centrally disposed inside the support housing 2, so that when a user wears the head-mounted display device on the head, both eyes of the user can adaptively correspond to the near-eye display optical system 1, thereby implementing a function of displaying a large field angle picture to human eyes. The embodiment of the utility model provides a wear-type display device adopts more slender near-to-eye display optical system 1, can make whole wear-type display device's structure more frivolous compact, and it is higher to wear the comfort level.
Optionally, referring to fig. 8, the head-mounted display device further includes: and the fixing belt 3 is used for being connected with the supporting shell 2 and forming a ring-shaped structure which can be worn on the head of a user. Wherein, fixed band 3 forms loop configuration after linking to each other with support housing 2, makes the user when wearing this head mounted display device, can laminate the head profile more, promotes the comfort level of wearing.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the technical solutions of the changes or replacements within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A near-eye display optical system, comprising: a display (11) and an optical element (12), the optical element (12) being arranged on a side of the display (11) where an image can be displayed; the optical element (12) comprises: a central super lens (121) and an edge super lens array (122) which are arranged in a coplanar manner, wherein the edge super lens array (122) is arranged around the central super lens (121) and is connected with the central super lens (121); the edge superlens array (122) comprises a plurality of edge superlenses (1222);
the central superlens (121) is opposite to a central area of the display (11) and is used for forming an image of the central area into an enlarged virtual image of the central area on the side, away from the optical element (12), of the display (11);
the edge super lens array (122) is opposite to the edge area of the display (11) and is used for enabling the image of the edge area to form a magnified virtual image of the edge area on the side, far away from the optical element (12), of the display (11).
2. The near-to-eye display optical system of claim 1, wherein the edge superlens (1222) is a circular ring structure.
3. The near-to-eye display optical system of claim 1, wherein the edge superlens array (122) is a close-packed structure.
4. The near-to-eye display optical system of claim 1, wherein a size of the central superlens (121) is larger than a size of the edge superlens (1222).
5. The near-to-eye display optical system of claim 1, wherein a focal length of the central superlens (121) is the same as a focal length of the edge superlens (1222).
6. A near-eye display optical system according to claim 1, wherein the display (11) comprises: a light emitting diode display, an organic light emitting diode display, a silicon based liquid crystal display, a digital micromirror device, or a mems based laser beam scanning display.
7. The near-to-eye display optical system of claim 1, wherein the central superlens (121) and the edge superlens (1222) share a same substrate.
8. The near-eye display optical system according to claim 7, wherein the central superlens (121) and the edge superlens (1222) each comprise: the super-surface nano structure comprises a super-surface nano structure and a filling material filled around the super-surface nano structure, wherein the filling material is a transparent or semitransparent material in an operating waveband, and the absolute value of the difference between the refractive index of the filling material and the refractive index of the super-surface nano structure is greater than or equal to 0.5.
9. A head-mounted display device, comprising: the near-to-eye display optical system (1) and the support housing (2) of any one of claims 1-8;
the near-eye display optical system (1) is arranged inside the support shell (2), and the support shell (2) is used for fixing the near-eye display optical system (1).
10. The head-mounted display device of claim 9, further comprising: the fixing band (3) is used for being connected with the supporting shell (2) and forming an annular structure which can be worn on the head of a user.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11927769B2 (en) | 2022-03-31 | 2024-03-12 | Metalenz, Inc. | Polarization sorting metasurface microlens array device |
| US11978752B2 (en) | 2019-07-26 | 2024-05-07 | Metalenz, Inc. | Aperture-metasurface and hybrid refractive-metasurface imaging systems |
| US11988844B2 (en) | 2017-08-31 | 2024-05-21 | Metalenz, Inc. | Transmissive metasurface lens integration |
-
2022
- 2022-05-31 CN CN202221339569.7U patent/CN217467351U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11988844B2 (en) | 2017-08-31 | 2024-05-21 | Metalenz, Inc. | Transmissive metasurface lens integration |
| US11978752B2 (en) | 2019-07-26 | 2024-05-07 | Metalenz, Inc. | Aperture-metasurface and hybrid refractive-metasurface imaging systems |
| US11927769B2 (en) | 2022-03-31 | 2024-03-12 | Metalenz, Inc. | Polarization sorting metasurface microlens array device |
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