CN214151260U - Near-to-eye display system and augmented reality equipment - Google Patents
Near-to-eye display system and augmented reality equipment Download PDFInfo
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- CN214151260U CN214151260U CN202121808472.1U CN202121808472U CN214151260U CN 214151260 U CN214151260 U CN 214151260U CN 202121808472 U CN202121808472 U CN 202121808472U CN 214151260 U CN214151260 U CN 214151260U
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Abstract
The present disclosure relates to a near-eye display system and an augmented reality device. Wherein, near-to-eye display system includes: the grating-based optical fiber coupling device comprises a substrate, a protective cover plate, a coupling input grating, a coupling output grating and a refraction type curved lens, wherein the coupling input grating and the coupling output grating are arranged between the substrate and the protective cover plate, the refraction type curved lens is arranged on one side, far away from the coupling output grating, of the protective cover plate, and the convex surface of the refraction type curved lens faces or backs to the coupling output grating. The optical fiber is modulated by the coupling input grating and the coupling output grating, and diopter correction is performed by the refraction type curved lens while the display visual field is enlarged, so that the user experience is enhanced. The integral shape and volume can meet the requirements of lightness, thinness and easy wearing.
Description
Technical Field
The present disclosure relates to the field of near-eye display technologies, and in particular, to a near-eye display system and an augmented reality device.
Background
Augmented Reality (AR) equipment superimposes generated virtual Augmented information to a real scene based on a near-eye display technology, seamless fusion of the real scene and the virtual scene is achieved, human eyes can see the external real scene and the virtual scene generated by a computer, and the AR equipment is widely applied to the fields of industry, navigation, education, medical treatment and the like. However, how to better improve the user experience of the near-eye display system-based augmented reality device is still a problem to be solved urgently in the industry.
SUMMERY OF THE UTILITY MODEL
The present disclosure provides a near-eye display system and an augmented reality device to enhance user experience. The technical scheme of the disclosure is as follows:
according to a first aspect of embodiments of the present disclosure, there is provided a near-eye display system comprising: the device comprises a substrate, a protective cover plate, a coupling input grating, a coupling output grating and a refraction type curved lens; wherein, the coupling input grating with the coupling output grating set up in the basement with between the protection apron, refraction type curved lens set up in the protection apron is kept away from one side of coupling output grating, the convex surface orientation of refraction type curved lens or dorsad the coupling output grating.
In an embodiment of the present disclosure, a convex surface of the curved refractive lens faces the coupling-out grating, and the convex surface of the curved refractive lens diverges incident light to a human eye.
In an embodiment of the present disclosure, a convex surface of the refractive curved lens faces away from the coupling-out grating, and a concave surface of the refractive curved lens converges incident light to a human eye.
In one embodiment of the present disclosure, the refractive curved lens includes any one of: spherical lens, aspherical lens, free-form surface lens, photorefractive material lens, microlens array lens and holographic lens.
In one embodiment of the present disclosure, the coupling-in grating is a volume holographic grating or a surface relief grating; the coupling output grating is a volume holographic grating or a surface relief grating.
In one embodiment of the present disclosure, the near-eye display system includes an image source for emitting a light beam having a fixed angle and carrying image information; and the converging unit is used for converging the light beam which has a fixed angle and carries image information into a parallel light beam, and the parallel light beam is incident to the coupling-in grating.
In one embodiment of the present disclosure, the condensing unit is a polarization splitting prism.
In one embodiment of the present disclosure, the image source is disposed at one side of the polarization splitting prism, and a light source, a half-wave plate and a reflector are sequentially disposed at the other side of the polarization splitting prism; the light emitted by the light source passes through the polarization beam splitter prism and the half-wave plate and is reflected by the reflector, and the reflector enables the reflected light to be incident to the image source.
In one embodiment of the present disclosure, the light source is a light emitting diode.
According to a second aspect of the embodiments of the present disclosure, there is provided an augmented reality device, including: the near-eye display system of the first aspect of the present disclosure.
The technical scheme provided by the embodiment of the disclosure at least brings the following beneficial effects: the near-to-eye display system is constructed by adopting a substrate, a protective cover plate, a coupling input grating, a coupling output grating and a refraction type curved lens, the coupling input grating and the coupling output grating are arranged between the substrate and the protective cover plate, the refraction type curved lens is arranged on one side, far away from the coupling output grating, of the protective cover plate, and the convex surface of the refraction type curved lens faces or faces back to the coupling output grating. Therefore, a larger display visual field is provided, diopter correction can be performed according to the user, and user experience is enhanced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the disclosure and are not to be construed as limiting the disclosure.
Fig. 1 is a schematic diagram illustrating a near-eye display system according to an exemplary embodiment.
FIG. 2 illustrates a diagram of modulation of different directional light rays by an in-coupling grating in a near-eye display system, according to an exemplary embodiment.
Fig. 3 illustrates a schematic diagram of the modulation of different directions of light by the out-coupling grating in a near-eye display system according to an exemplary embodiment.
FIG. 4 illustrates a schematic diagram of the modulation of light by a refractive curved lens in a near-eye display system according to an exemplary embodiment.
FIG. 5 is a diagram illustrating modulation of light by a refractive curved lens in a near-eye display system, according to another exemplary embodiment.
FIG. 6 is a diagram illustrating a refractive curved lens and an output grating in a near-eye display system according to an exemplary embodiment.
Fig. 7 is a schematic diagram illustrating a near-eye display system according to another exemplary embodiment.
Fig. 8 is a block diagram illustrating an augmented reality device according to an example embodiment.
Fig. 9 is a schematic diagram of augmented reality glasses according to an embodiment of the present disclosure.
Fig. 10 is a schematic diagram of a heads-up display device according to an embodiment of the disclosure.
Detailed Description
In order to make the technical solutions of the present disclosure better understood by those of ordinary skill in the art, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings.
It should be noted that the terms "first," "second," and the like in the description and claims of the present disclosure and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the disclosure described herein are capable of operation in sequences other than those illustrated or otherwise described herein. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
Fig. 1 is a schematic structural diagram of a near-eye display system according to an exemplary embodiment, and as shown in fig. 1, the near-eye display system according to the embodiment of the present disclosure may specifically include: a substrate 101, a protective cover plate 102, an in-coupling grating 103, an out-coupling grating 104 and a refractive curved lens 105, wherein:
a coupling-in grating 103 and a coupling-out grating 104 are disposed between the substrate 101 and the protective cover 102, wherein the coupling-in grating 103 may specifically include, but is not limited to, a volume holographic grating, a surface relief grating, and the like, and the coupling-out grating 104 may specifically include, but is not limited to, a volume holographic grating or a surface relief grating, and the like.
In the embodiment of the present disclosure, according to the strict coupled wave theory, the coupling-in grating 103 has a certain angle selectivity as a diffraction grating, and can modulate incident light rays in a certain angle range as shown in fig. 2. The coupling-out grating 104 can obtain the emergent light by utilizing interference recording of plane waves and divergent spherical waves, as shown in fig. 3, the light in different directions is modulated by the coupling-out grating 104, the brightness of the emergent light has the characteristic similar to lambertian radiation, the brightness uniformity of the light in different directions is ensured, and the capability of a system for displaying a view field is expanded based on the flexibility of the diffraction angle of the coupling-out grating 104.
The curved refractive lens 105 is disposed on a side of the protective cover 102 away from the coupling-out grating 104, and a convex surface 1051 of the curved refractive lens 105 faces or faces away from the coupling-out grating 104 (the convex surface 1051 faces away from the coupling-out grating 104 in fig. 1 is illustrated as an example). The refractive curved lens 105 may specifically include, but is not limited to, any one of the following: spherical lens, aspherical lens, free-form lens, photorefractive material lens, microlens array lens, holographic lens, and the like.
In the embodiment of the present disclosure, the refractive curved lens 105 may expand the display field of view, and simultaneously, the requirement of the myopic or hyperopic people is met by correcting the external environment and the virtual image transmitted by the waveguide, as shown in fig. 4, the convex surface 1051 of the refractive curved lens 105 faces away from the coupling-out grating 104, when the coupling-out grating 104 outputs the modulated scattered light to the concave surface 1052 of the refractive curved lens 105, the concave surface 1052 serves as a refractive surface, the incident light, that is, the modulated scattered light output by the coupling-out grating 104, is converged to the human eye, and the light entering the human eye is most or all of the converged light, so as to adapt to the hyperopic people. As shown in fig. 5, the convex surface 1051 of the curved refractive lens 105 faces the coupling-out grating 104, when the coupling-out grating 104 outputs the modulated scattered light to the convex surface 1051 of the curved refractive lens 105, the convex surface 1051 serves as a refractive surface, the divergent incident light, i.e., the modulated scattered light output by the coupling-out grating 104, is transmitted to human eyes, and the light entering the human eyes is a small portion of the divergent light, so as to adapt to the people with myopia.
Therefore, the light rays converged or diverged by the refractive type curved lens 105 are transmitted to the position of the human eye, thereby achieving diopter correction.
Alternatively, the exit pupil distance may be determined by the shape of the curved refractive lens 105, the position of the curved refractive lens 105 relative to the cou-pling-out grating 104, the divergence angle of the cou-pling-out grating 104 and the size of the cou-pling-out grating 104, so that the position of the curved refractive lens 105 relative to the cou-pling-out grating 104 may be determined according to the exit pupil distance required to meet the needs of the near-sighted or far-sighted person. For example, taking the convex surface 1051 of the curved refractive lens 105 facing away from the coupling-out grating 104 as an example, as shown in fig. 6, A, B, C are points at two edges and a middle position of the coupling-out grating 104, θ is a divergence angle of the coupling-out grating 104 with respect to light rays, L represents a vertical distance between the curved refractive lens 105 and the coupling-out grating 104, and L is set such that the light rays diverged directionally at the points a and B of the coupling-out grating 104 converge through the concave surface 1052 of the curved refractive lens 105 to meet the requirements of the far-sighted people, that is, the exit pupil distance meets the requirements of the far-sighted people.
On the basis of the above embodiments, as shown in fig. 7, the near-eye display system according to the embodiment of the present disclosure may specifically include:
an image source 701 for emitting a light beam having a fixed angle and carrying image information.
A converging unit 702 for converging a light beam having a fixed angle and carrying image information into a parallel light beam, which is incident to the coupling-in grating 103.
In some embodiments, image source 701 may specifically include, but is not limited to, any of the following: liquid Crystal On Silicon (LCOS) displays, Digital Light Processing (DLP) displays, Micro-LED (Micro-LED) displays, and the like.
In some embodiments, the converging unit 702 may include, but is not limited to, a Polarizing Beam Splitter (PBS) 7021. As a possible implementation, the image source 701 is disposed on one side of the polarization beam splitter 7021, and a light source 703, a Half-Wave plate (Half-Wave plate) 704 and a Mirror (Mirror) 705 may be sequentially disposed on the other side of the polarization beam splitter 7021.
In an implementation, the light source may include, but is not limited to, a Light Emitting Diode (LED), and optionally, one possible modulation of the light before entering the coupling-in grating 103 is as follows: light emitted by the light source 703 passes through the polarization beam splitter prism 7021 and the half-wave plate 704, and is reflected by the mirror 705, and the light reflected by the mirror 705 is incident on the image source 701. Based on the incident light, the image source 701 emits a light beam with a fixed angle and carrying image information, and the light beam with the fixed angle and carrying the image information is converged into a parallel light beam by the polarization beam splitter 7021 in the converging unit 702 and enters the coupling-in grating 103.
The near-to-eye display system provided by the embodiment of the disclosure is constructed by adopting a substrate, a protective cover plate, a coupling input grating, a coupling output grating and a refraction type curved lens, wherein the coupling input grating and the coupling output grating are arranged between the substrate and the protective cover plate, the refraction type curved lens is arranged on one side of the protective cover plate far away from the coupling output grating, and the convex surface of the refraction type curved lens faces or faces back to the coupling output grating. According to the embodiment of the disclosure, the light is modulated by the coupling input grating and the coupling output grating, and the diopter correction is performed while the display visual field is enlarged by the refraction type curved lens, so that the user experience is enhanced. The integral shape and volume can meet the requirements of lightness, thinness and easy wearing.
To implement the foregoing embodiments, the present disclosure further provides an augmented reality device, and fig. 8 is a block diagram of an augmented reality device according to an exemplary embodiment. As shown in fig. 8, an augmented reality device 800 according to an embodiment of the present disclosure includes: the near-eye display system 801 shown in the above embodiments.
As a possible implementation, the augmented reality device 800 may be augmented reality glasses 900 as shown in fig. 9.
As a possible implementation, the augmented reality device 800 may be a head-up display device 1000 as shown in fig. 10.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (10)
1. A near-eye display system, comprising: the device comprises a substrate, a protective cover plate, a coupling input grating, a coupling output grating and a refraction type curved lens;
wherein, the coupling input grating with the coupling output grating set up in the basement with between the protection apron, refraction type curved lens set up in the protection apron is kept away from one side of coupling output grating, the convex surface orientation of refraction type curved lens or dorsad the coupling output grating.
2. The near-to-eye display system of claim 1 wherein the convex surface of the curved refractive lens faces the grating, and wherein the convex surface of the curved refractive lens diverges incident light rays to the human eye.
3. The near-to-eye display system of claim 1 wherein the convex surface of the curved refractive lens faces away from the coupled-out grating and the concave surface of the curved refractive lens converges incident light rays to a human eye.
4. The near-to-eye display system of claim 1 wherein the refractive curved lens comprises any one of:
spherical lens, aspherical lens, free-form surface lens, photorefractive material lens, microlens array lens and holographic lens.
5. The near-to-eye display system of claim 1 wherein the coupling-in grating is a volume holographic grating or a surface relief grating; the coupling output grating is a volume holographic grating or a surface relief grating.
6. The near-eye display system of claim 1, comprising:
the image source is used for emitting light beams with fixed angles and carrying image information;
and the converging unit is used for converging the light beam which has a fixed angle and carries image information into a parallel light beam, and the parallel light beam is incident to the coupling-in grating.
7. The near-to-eye display system of claim 6 wherein the converging unit is a polarizing beam splitting prism.
8. The near-eye display system of claim 7 wherein the image source is disposed on one side of the polarization splitting prism, and a light source, a half-wave plate, and a mirror are disposed on the other side of the polarization splitting prism in sequence;
the light emitted by the light source passes through the polarization beam splitter prism and the half-wave plate and is reflected by the reflector, and the reflector enables the reflected light to be incident to the image source.
9. The near-to-eye display system of claim 8 wherein the light source is a light emitting diode.
10. An augmented reality device, comprising: the near-eye display system of any one of claims 1-9.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023241253A1 (en) * | 2022-06-17 | 2023-12-21 | 京东方科技集团股份有限公司 | Optical waveguide lens and packaging method therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023241253A1 (en) * | 2022-06-17 | 2023-12-21 | 京东方科技集团股份有限公司 | Optical waveguide lens and packaging method therefor |
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