CN108803020B - Near-to-eye display system and head-mounted display equipment - Google Patents
Near-to-eye display system and head-mounted display equipment Download PDFInfo
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Abstract
The invention discloses a near-to-eye display system and a head-mounted display device, comprising: the light source comprises a plurality of sub light sources, and when the image to be projected is projected, the light rays emitted by the current sub light sources are uniformly distributed on the display module; the display module is used for displaying an image to be projected and emitting light rays corresponding to the image to be projected to the eyepiece lens group; the eyepiece lens group is used for emitting the light rays corresponding to the image to be projected to the lens corresponding to the current sub-light source in the lens array; the lens is used for projecting the light rays corresponding to the image to be projected to the corresponding waveguide coupling device; the waveguide coupling device is used for coupling the light rays corresponding to the images to be projected into the corresponding near-eye display panel waveguide; the near-eye display panel waveguide is used for guiding light rays corresponding to the image to be projected into human eyes.
Description
Technical Field
The invention relates to the field of virtual reality and augmented reality, in particular to a near-to-eye display system and a head-mounted display device.
Background
Virtual Reality (VR) is a computer simulation system that can create and experience a Virtual world, and uses a computer to generate a simulated environment, and immerses a user in the environment through interactive system simulation of three-dimensional dynamic views and entity behaviors, thereby bringing a sensory experience beyond a real living environment to the user. In terms of vision, virtual reality technology utilizes a computer device to generate an image of a virtual scene and transmits the image light to human eyes through an optical device, so that a user can fully perceive the virtual scene visually.
Augmented Reality (AR) is a technology for Augmented Reality of a real scene using virtual objects or information. The augmented reality technology is generally based on a real physical environment image obtained by an image acquisition device such as a camera, and through identification, analysis and query retrieval of a computer system, a virtual image generated virtually by text content, image content or an image model and the like associated with the real physical environment image is displayed in the real physical environment image, so that a user can obtain related extended information such as a label and a description of a real object in the real physical environment of the user, or experience a stereoscopic and highlighted augmented visual effect of the real object in the real physical environment.
The existing virtual reality and augmented reality technologies mostly adopt binocular parallax to realize depth display and perception of 3D images, conflict of visual radiation adjustment and perception depth can exist, wherein the visual radiation adjustment means that two eyes of a person have self-adjusting capacity to influence distance, but the capacity is not very quick conversion, due to the fact that coordination capacity of the two eyes is limited, when the two eyes focus on a screen, the self-adjusting capacity of the two eyes is far from as fast as image switching speed, therefore, the situation that a user is dizzy and nausea occurs due to long-time watching, even eyes of the user are damaged, and therefore the existing augmented display and virtual reality technologies are difficult to meet the needs of market consumers.
Disclosure of Invention
The invention aims to provide a near-eye display system and a head-mounted display device, which are used for solving the technical problem that the conflict between visual radiation regulation and depth perception exists when the depth display and the perception of a 3D image are realized by adopting binocular parallax in the prior art.
To achieve the above object, a first aspect of an embodiment of the present invention provides a near-eye display system, including: the light source comprises a plurality of sub light sources, the illumination angle of light rays emitted by each sub light source on the display module is different, the imaging focal lengths of a plurality of lenses in the lens array are different, the plurality of sub light sources correspond to the plurality of lenses one by one, the plurality of waveguide coupling devices correspond to the plurality of lenses one by one, and the plurality of near-eye display panel waveguides correspond to the plurality of waveguide coupling devices one by one;
when a to-be-projected image is projected, light rays emitted by the current sub light source corresponding to the depth information of the to-be-projected image in the plurality of sub light sources are uniformly distributed on the display module;
the display module is used for displaying a to-be-projected image and emitting light rays corresponding to the to-be-projected image to the eyepiece lens group after receiving light rays emitted by the current sub-light source;
the eyepiece lens group is used for receiving light rays corresponding to the image to be projected and emitting the light rays corresponding to the image to be projected to a lens corresponding to the current sub-light source in the lens array;
the lens is used for projecting the light rays corresponding to the image to be projected to the corresponding waveguide coupling device;
the waveguide coupling device is used for coupling the light rays corresponding to the images to be projected into the corresponding near-eye display panel waveguide;
the near-eye display panel waveguide is used for guiding light rays corresponding to the image to be projected into human eyes.
Optionally, the light source includes an illumination light source and a light source lens group;
the light source lens group is located on an emergent light path of the illumination light source and used for uniformly distributing light rays emitted by the illumination light source on the display module.
Optionally, the illumination light source is an array light source or a scanning light source.
Optionally, the array light source is a laser array or an optical fiber illumination light source array;
the scanning light source is an optical fiber scanning light source or a micro-electro-mechanical system MEMS scanning mirror light source.
Optionally, the display module is located on an exit pupil surface of the light source lens group.
Optionally, the display module is a liquid crystal silicon-attached LCOS display module or a digital multifunctional spliced DMD display module.
Optionally, the LCOS display module includes an LCOS display and a polarization beam splitter PBS prism;
the DMD display module comprises a DMD display and a Total Internal Reflection (TIR) prism.
Optionally, the lens array is located on an exit pupil surface of the eyepiece lens group.
A second aspect of embodiments of the present invention provides a head mounted display device comprising a near-eye display system of the first aspect mounted on a head-mounted part and positioned to direct a light beam to a wearer's eye, and a head-mounted part for wearing on a user's head.
Optionally, the head-mounted display device includes two sets of near-eye display systems, where light emitted from the first set of near-eye display systems enters a left eye of the wearer, and light emitted from the second set of near-eye display systems enters a right eye of the wearer.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
in the scheme of the embodiment of the invention, because the light source of the near-eye display system comprises a plurality of sub-light sources, the illumination angles of the light rays emitted by the plurality of sub-light sources on the display module are different, so that a plurality of groups of light rays emitted by the plurality of sub-light sources are projected to different waveguide coupling devices by different lenses in a lens array after passing through the display module, the projection distances of the plurality of groups of light rays are different due to different imaging focal lengths of different lenses, the images to be projected with different projection distances can be projected into human eyes by projecting the plurality of groups of light rays corresponding to the images with different depths to different waveguide coupling devices and then guiding the light rays into the human eyes by different near-eye display panel waveguides, thereby realizing the image observation with different depths, avoiding realizing the 3D image display by binocular parallax in the prior art, further solving the problems existing in the prior art that the depth display and perception of the 3D image are, the technical problem of conflict between visual radiation adjustment and depth perception exists, and a new depth display mode is provided.
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 the drawings without inventive exercise:
fig. 1 is a schematic structural diagram of a near-eye display system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a possible implementation manner of a light source provided in an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an optical fiber scanning light source according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a MEMS scanning mirror light source according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a possible implementation manner of a near-eye display system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a near-eye display system according to an embodiment of the present invention, where the near-eye display system includes a light source 10, a display module 20, an eyepiece lens group 30, a lens array 40, a plurality of waveguide coupling devices 50, and a plurality of near-eye display slab waveguides 60, where the light source 10 includes a plurality of sub-light sources, illumination angles of light rays emitted by each sub-light source on the display module 20 are different, imaging focal lengths of a plurality of lenses in the lens array 40 are different from each other, the plurality of sub-light sources correspond to the plurality of lenses one to one, the plurality of waveguide coupling devices 50 correspond to the plurality of lenses one to one, and the plurality of near-eye display slab waveguides 60 correspond to the plurality of waveguide coupling devices 50 one to one.
In the embodiment of the present invention, when the image to be projected is projected, the emitted light is uniformly distributed on the display module 20 by the current sub-light source corresponding to the depth information of the image to be projected; the display module 20 is configured to display an image to be projected, and after receiving light emitted by a current sub-light source, the display module 20 emits light corresponding to the image to be projected to the eyepiece lens group 30, where the eyepiece lens group 30 is configured to receive light corresponding to the image to be projected and emit light corresponding to the image to be projected to a lens corresponding to the current sub-light source in the lens array 40, and then the lens is configured to project light corresponding to the image to be projected to a corresponding waveguide coupling device 50; finally, the waveguide coupling device 50 couples the light corresponding to the image to be projected into the corresponding near-eye display slab waveguide 60, and then the near-eye display slab waveguide 60 guides the multiple groups of light into human eyes.
In the above scheme, because the imaging focal lengths of different lenses in the lens array 40 are different, when light sources emitted by different sub-light sources are emitted to corresponding lenses, the projection distances of light rays emitted by different sub-light sources are different, and then the light rays with different projection distances are guided into human eyes through different near-to-eye display panel waveguides 60, so that the light rays corresponding to images to be projected with different projection distances can be projected into the human eyes, and thus, image observation with different depths is realized.
In the embodiment of the present invention, the light source 10 will be described first.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a possible implementation manner of a light source according to an embodiment of the present invention, in which a light source 10 includes an illumination light source 101 and a light source lens group 102, the light source lens group 102 is located on an emergent light path of the illumination light source 101, and the light source lens group 102 is used for uniformly distributing light emitted by the illumination light source 101 on a display module 20.
Further, in order to realize different projection distances, the illumination angle of each sub-light source on the display module 20 is different. For example, as shown in fig. 2, if the near-eye display system includes three sub-light sources, if the included angle between the optical axis of each sub-light source and the plane (shown by the dotted line in fig. 2) where the display module 20 is located is different, the illumination angles of the light projected by the three sub-light sources 10 onto the pixel point a are different for any pixel point a on the display module 20 (not shown in the figure).
In a specific implementation, the illumination light source 101 may be an array light source, such as: laser array, optical fiber illumination light source array. Specifically, as shown in fig. 2, assuming that the light source 10 includes 3 sub light sources, 3 independent optical fiber illumination light sources may be included in the optical fiber illumination light source array.
In another possible embodiment, the illumination light source 101 may also be a scanning light source, such as: an optical fiber scanning light source or a Micro-Electro-Mechanical System (MEMS) scanning mirror light source, as shown in fig. 3 and 4, fig. 3 is a schematic structural diagram of the optical fiber scanning light source provided in the embodiment of the present invention, and fig. 4 is a schematic structural diagram of the MEMS scanning mirror light source provided in the embodiment of the present invention. For the scanning light source, a plurality of sub light sources can be generated by modulating a scanning light source, as shown in fig. 3, when the scanning optical fiber vibrates to different positions, the optical fiber scanning light source generates 3 sub light sources by modulating the light source, and when the scanning optical fiber vibrates to different positions, the lighting angles of the light rays emitted by the generated sub light sources on the display module 20 are different. In a specific implementation process, 5 or more sub-light sources may be generated by light source modulation, which is not limited by the present invention.
In the above scheme, when the number of the sub light sources included in the light source 10 is large, the scanning light source may be adopted to reduce the volume of the light source 10, so as to reduce the volume of the near-eye display system.
In the embodiment of the present invention, the display module 20 is configured to display an image to be projected, the display module 20 does not emit light, the display module 20 is located on the exit pupil surface of the light source lens group 102, light emitted by the plurality of sub light sources irradiates the display module 20, and the display module 20 can output light corresponding to the image to be projected by controlling the transmittance or reflectance of the light, so that the image displayed on the display module 20 can be seen by human eyes.
In the embodiment of the present invention, the display module 20 may be a reflective display module, for example: the display module 20 may be a transmissive display module, such as an LCOS (Liquid Crystal on Silicon; chinese name: Liquid Crystal on Silicon or Liquid Crystal on Silicon) display module: DMD (Digital multi-function display; Chinese name: Digital multi-function mosaic) display module. The LCOS display module comprises an LCOS display and a Polarization Beam Splitter (PBS) prism; the DMD display module comprises a DMD display and a Total Internal Reflection (TIR) prism.
In the embodiment of the present invention, the display module 20 is taken as an example of a reflective LCOS display module. Referring to fig. 5, fig. 5 is a schematic structural diagram of a possible implementation manner of a near-eye display system according to an embodiment of the present invention. Light emitted by the illumination light source 101 passes through the light source lens group 102 and the PBS prism 202 and is uniformly distributed on the LCOS display 201, then the light reflected by the LCOS display 201 and corresponding to an image to be projected is reflected to the eyepiece lens group 30 by the PBS prism 202, the eyepiece lens group 30 is used for magnifying the image to be projected, and then the magnified light corresponding to the image to be projected is emitted to the lens array 40.
In the embodiment of the present invention, the lens array 40 is located on the exit pupil surface of the eyepiece lens group 30, the lens array 40 may include a plurality of lenses with different imaging focal lengths, the number of the lenses is the same as the number of the sub light sources included in the light source 10, and the plurality of sub light sources and the plurality of lenses in the lens array 40 are in one-to-one correspondence. For example, assuming that the near-eye display system includes 3 sub-light sources, the lens array 40 includes 3 lenses, for example: assuming that the near-eye display system includes 5 sub-light sources, correspondingly, 5 lenses are included in the lens array 40. Because the imaging focal length of each lens is different, the light rays emitted by different sub-light sources can be projected to different projection distances by different lenses, and because the light rays emitted by each sub-light source are uniformly distributed on the LCOS display 201, the light rays emitted to each lens correspond to a complete image to be projected, so that human eyes can see images at different depths.
Then, the light rays emitted from different lenses are projected to different waveguide coupling devices 50, coupled into different near-eye display panel waveguides 60 through different waveguide coupling devices 50, and guided into human eyes through different near-eye display panel waveguides 60, thereby realizing image display at different depths.
In the embodiment of the invention, when the image to be projected is projected, the near-eye display system can select the corresponding sub-light source according to the depth information of the image to be projected, so that the imaging focal length of the lens corresponding to the sub-light source is matched with the depth information of the image to be projected.
In the embodiment of the present invention, the number of the sub-light sources and the number of the lenses in the lens array 40 may be determined by the order of the projection depth of the near-eye display system. For example, in the space, 13m (meter) -infinity is a first order, 8 m-13 m is a first order, 5 m-8 m is a first order, 3-5 m is a first order, and 0.5 m-3 m is a first order, the near-to-eye display system may include 5 sub-light sources and 5 lenses with different imaging focal lengths, thereby realizing image display with different depths of the 5 orders. Another example is: the distance from 10m to infinity in the space is the first order, the distance from 5m to 10m is the first order, and the distance from 0.5m to 5m is the first order, so that the near-eye display system can comprise 3 sub-light sources and 3 lenses with different imaging focal lengths, thereby realizing the image display of the 3 orders with different depths.
Specifically, when selecting a sub-light source corresponding to an image to be projected, the following two ways are possible. In one possible embodiment, the image to be projected includes depth information in addition to the gray scale and color information, so that the near-eye display system may directly select the corresponding sub-light source according to the depth information of the image to be projected itself, so as to project the image to be projected to the projection distance corresponding to the depth information through the corresponding lens in the lens array 40, thereby implementing depth display.
In another possible embodiment, the head-mounted display device including the near-eye display system may obtain the focal point of the human eye in real time to obtain the projection distance that the near-eye display system needs to achieve, and then select the corresponding sub-light source according to the focal point of the human eye to project the image to be projected to the projection distance through the corresponding lens in the lens array 40, so as to achieve depth display. In a specific implementation process, other manners may also be adopted to select the sub-light source corresponding to the image to be projected, which is not limited in the present invention.
Based on the same inventive concept, embodiments of the present invention further provide a head-mounted display apparatus, including the near-eye display system in the above embodiments and a head-mounted part for being worn on the head of a user, the near-eye display system being mounted on the head-mounted part and positioned to direct a light beam to the eyes of the wearer. Various changes and specific examples of the near-eye display system in the embodiments corresponding to fig. 1 to fig. 5 are also applicable to the head-mounted display device in the embodiment, and a person skilled in the art can clearly know the implementation of the head-mounted display device in the embodiment through the foregoing detailed description of the near-eye display system, so that the detailed description is omitted here for the sake of brevity of the description.
In one possible implementation, the head-mounted display device may include a set of near-eye display systems, and direct light emitted by the near-eye display systems to the left or right eye of the person. In another possible implementation, the head-mounted display device may include two sets of near-eye display systems, where light emitted from the first set of near-eye display systems enters the left eye of the person, and light emitted from the second set of near-eye display systems enters the right eye of the person, so as to implement virtual reality display or augmented reality display.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
in the scheme of the embodiment of the invention, because the light source of the near-eye display system comprises a plurality of sub-light sources, the illumination angles of the light rays emitted by the plurality of sub-light sources on the display module are different, so that a plurality of groups of light rays emitted by the plurality of sub-light sources are projected to different waveguide coupling devices by different lenses in a lens array after passing through the display module, the projection distances of the plurality of groups of light rays are different due to different imaging focal lengths of different lenses, the images to be projected with different projection distances can be projected into human eyes by projecting the plurality of groups of light rays corresponding to the images with different depths to different waveguide coupling devices and then guiding the light rays into the human eyes by different near-eye display panel waveguides, thereby realizing the image observation with different depths, avoiding realizing the 3D image display by binocular parallax in the prior art, further solving the problems existing in the prior art that the depth display and perception of the 3D image are, the technical problem of conflict between visual radiation adjustment and depth perception exists, and a new depth display mode is provided.
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (10)
1. A near-eye display system, comprising: the light source comprises a plurality of sub light sources, the illumination angle of light rays emitted by each sub light source on the display module is different, the imaging focal lengths of a plurality of lenses in the lens array are different, the plurality of sub light sources correspond to the plurality of lenses one by one, the plurality of waveguide coupling devices correspond to the plurality of lenses one by one, and the plurality of near-eye display panel waveguides correspond to the plurality of waveguide coupling devices one by one;
when a to-be-projected image is projected, light rays emitted by the current sub light source corresponding to the depth information of the to-be-projected image in the plurality of sub light sources are uniformly distributed on the display module;
the display module is used for displaying a to-be-projected image and emitting light rays corresponding to the to-be-projected image to the eyepiece lens group after receiving light rays emitted by the current sub-light source;
the eyepiece lens group is used for receiving light rays corresponding to the image to be projected and emitting the light rays corresponding to the image to be projected to a lens corresponding to the current sub-light source in the lens array;
the lens is used for projecting the light rays corresponding to the image to be projected to the corresponding waveguide coupling device;
the waveguide coupling device is used for coupling the light rays corresponding to the images to be projected into the corresponding near-eye display panel waveguide;
the near-eye display panel waveguide is used for guiding light rays corresponding to the image to be projected into human eyes.
2. The near-eye display system of claim 1 wherein the light source comprises an illumination source and a light source lens group;
the light source lens group is located on an emergent light path of the illumination light source and used for uniformly distributing light rays emitted by the illumination light source on the display module.
3. The near-eye display system of claim 2 wherein the illumination source is an array light source or a scanning light source.
4. The near-eye display system of claim 3 wherein the array light source is a laser array or an array of fiber optic illumination light sources;
the scanning light source is an optical fiber scanning light source or a micro-electro-mechanical system MEMS scanning mirror light source.
5. The near-eye display system of claim 2, wherein the display module is located on an exit pupil surface of the light source lens group.
6. The near-to-eye display system of claim 1 wherein the display module is a Liquid Crystal On Silicon (LCOS) display module or a digital multi-function tiled Digital Micromirror Device (DMD) display module.
7. The near-eye display system of claim 6 wherein the LCOS display module comprises an LCOS display and a polarizing beam splitting PBS prism;
the DMD display module comprises a DMD display and a Total Internal Reflection (TIR) prism.
8. The near-eye display system of any one of claims 1-7 wherein the array of lenses is located on an exit pupil surface of the set of eyepiece lenses.
9. A head-mounted display device comprising the near-eye display system of any one of claims 1-8 and a head-mounted component for wearing on a user's head, the near-eye display system mounted on the head-mounted component and positioned to direct light beams to a wearer's eye.
10. The head-mounted display device of claim 9, wherein the head-mounted display device comprises two sets of the near-eye display systems, wherein light exiting the first set of near-eye display systems enters a left eye of the wearer and light exiting the second set of near-eye display systems enters a right eye of the wearer.
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| EP3733139A1 (en) * | 2019-05-02 | 2020-11-04 | Gensight Biologics | Viewing apparatus and method for projecting a light signal |
| CN110456508A (en) * | 2019-07-30 | 2019-11-15 | 成都理想境界科技有限公司 | A kind of near-eye display system and intelligent glasses |
| CN110824699B (en) * | 2019-12-25 | 2020-12-04 | 歌尔光学科技有限公司 | Eyeball tracking system of near-to-eye display equipment and near-to-eye display equipment |
| CN111796425A (en) * | 2020-07-15 | 2020-10-20 | 上海慧希电子科技有限公司 | Optical system |
| CN112346252A (en) * | 2020-11-09 | 2021-02-09 | 京东方科技集团股份有限公司 | Near-to-eye display device |
| CN114252998B (en) * | 2022-03-02 | 2022-07-12 | 北京灵犀微光科技有限公司 | Near-to-eye display device |
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| JP6410094B2 (en) * | 2014-11-14 | 2018-10-24 | 日本精機株式会社 | Head-up display |
| CN106371222A (en) * | 2016-11-30 | 2017-02-01 | 苏州苏大维格光电科技股份有限公司 | Waveguide lens of nanometer optical lens and multi-field-depth 3D display device |
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