CN111624768A - Reflection folding waveguide display system - Google Patents
Reflection folding waveguide display system Download PDFInfo
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- CN111624768A CN111624768A CN201911061708.7A CN201911061708A CN111624768A CN 111624768 A CN111624768 A CN 111624768A CN 201911061708 A CN201911061708 A CN 201911061708A CN 111624768 A CN111624768 A CN 111624768A
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- 239000000758 substrate Substances 0.000 claims description 38
- 239000011521 glass Substances 0.000 abstract description 5
- 208000003464 asthenopia Diseases 0.000 abstract description 3
- 210000001747 pupil Anatomy 0.000 description 8
- 230000003287 optical effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000003190 augmentative effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B2027/0178—Eyeglass type
Abstract
The application provides a reflection folding waveguide display system, wherein, reflection folding waveguide display system is including showing image source, waveguide basement, waveguide internal reflection face and waveguide reflection exit surface, the waveguide basement is used for coming show the light beam reflection of image source extremely on the waveguide internal reflection face, waveguide internal reflection face be used for with the light beam reflection extremely on the waveguide reflection exit surface, waveguide reflection exit surface be used for with the light beam directly reflects to people's eye. According to the reflection folding waveguide display system, the human eyes can naturally focus to the focal planes with different distances, the large-depth-of-field and multi-focal-plane display is realized, the convergence conflict of the human eyes is solved, and the visual fatigue is relieved; in addition, the reflection folding waveguide display system has a compact structure and a small volume, can be used for realizing a compact glasses type display system, and can improve the light beam energy entering human eyes from the outside world in the display system.
Description
Technical Field
The present application relates to the field of optical technology, and more particularly, to a reflective folded waveguide display system.
Background
The display system may be used to make the desired image visible to the user, as an optical display system may be employed in a head-mounted device to transmit and display the desired image so as to be visible to the human eye. Prior art display systems are typically implemented using a Birdbath, freeform prism, or arrayed waveguide.
However, the above prior art scheme can only realize the display of one focal plane, and especially for the head-mounted device, because the display of one focal plane can only be realized and the head-mounted device cannot focus, if the head-mounted device is worn and watched for a long time, the eyes of the user easily generate a strong uncomfortable feeling, and the wearing experience is poor. In addition, based on the above prior art solutions, the increase of the viewing angle may cause the overall weight and volume of the optical display system to increase, and especially when the display system is applied to a head-mounted device, the increase of the weight and volume may also bring a poor wearing experience to a user.
Content of application
It is an object of the present application to provide a compact reflective folded waveguide display system with a large depth of field.
According to an aspect of the present application, there is provided a reflective folded waveguide display system, wherein the reflective folded waveguide display system includes a display image source, a waveguide substrate, a waveguide internal reflection surface, and a waveguide reflection exit surface, the waveguide substrate is configured to reflect a light beam from the display image source onto the waveguide internal reflection surface, the waveguide internal reflection surface is configured to reflect the light beam onto the waveguide reflection exit surface, and the waveguide reflection exit surface is configured to directly reflect the light beam to a human eye.
In some embodiments, the waveguide substrate surface is coated with a reflective film.
In some embodiments, the waveguide substrate is a planar or curved substrate.
In some embodiments, the shape of the internal reflecting surface of the waveguide is any one of: a plane; spherical surface; an aspherical surface; a free-form surface.
In some embodiments, the waveguide reflective exit face comprises at least one exit aperture.
In some embodiments, the projected maximum aperture diameter of the exit aperture to the human eye is less than 2 mm.
In some embodiments, the exit aperture is shaped as any one of: a circular shape; an ellipse; a polygon.
In some embodiments, the waveguide internal reflection surface and the waveguide reflection exit surface are total reflection surfaces or partial reflection surfaces.
In some embodiments, light from a display image source is reflected from the waveguide substrate onto the waveguide internal reflection surface, then reflected from the waveguide internal reflection surface onto the waveguide substrate, then reflected from the waveguide substrate onto the waveguide reflection exit surface, and then directly reflected from the waveguide reflection exit surface to a human eye.
In some embodiments, light beams from a display image source are reflected from the waveguide substrate onto the waveguide internal reflection surface, then reflected from the waveguide internal reflection surface directly onto the waveguide reflection exit surface, and then reflected from the waveguide reflection exit surface directly to a human eye.
In some embodiments, the reflective folded waveguide display system has a thickness of less than 10 mm.
Compared with the prior art, the method has the following advantages: according to the reflection folding waveguide display system, the human eyes can naturally focus to the focal planes with different distances, the large-depth-of-field and multi-focal-plane display is realized, the convergence conflict of the human eyes is solved, and the visual fatigue is relieved; in addition, the reflection folding waveguide display system has a compact structure and a small volume, can be used for realizing a compact glasses type display system, and can improve the light beam energy entering human eyes from the outside world in the display system.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 illustrates a schematic structural diagram of a reflective folded waveguide display system according to an example of the present application;
FIG. 2 illustrates a side view of a portion of the structure of the reflective folded waveguide display system of FIG. 1.
The same or similar reference numbers in the drawings identify the same or similar elements.
Detailed Description
The present application is described in further detail below with reference to the attached figures.
According to an aspect of the present application, there is provided a reflective folded waveguide display system, wherein the reflective folded waveguide display system includes a display image source, a waveguide substrate, a waveguide internal reflection surface, and a waveguide reflection exit surface, the waveguide substrate is configured to reflect a light beam from the display image source onto the waveguide internal reflection surface, the waveguide internal reflection surface is configured to reflect the light beam onto the waveguide reflection exit surface, and the waveguide reflection exit surface is configured to directly reflect the light beam to a human eye. Wherein the waveguide internal reflection surface and the waveguide reflection exit surface are located inside the waveguide substrate.
Wherein the display image source is used for emitting light beams for displaying images, and the display image source includes but is not limited to: LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), micro-OLED (micro Organic Light-Emitting Diode), micro-LED (micro Light-Emitting Diode), and LCoS (Liquid Crystal on silicon).
It should be noted that the above-mentioned various display image sources are only examples, and the present application does not limit the display image sources, and it can be understood by those skilled in the art that any element or structure for emitting light beams for displaying images is included in the scope of the display image sources described in the present application.
In some embodiments, the waveguide substrate is a planar substrate; in other embodiments, the waveguide substrate is a curved substrate. In some embodiments, the light beam is totally reflected at the waveguide substrate surface. In other embodiments, the waveguide substrate surface is coated with a reflective film to reflect the light beam through the reflective film.
Alternatively, the shape of the waveguide internal reflection surface may be any one of a plane, a spherical surface, an aspherical surface and a free-form surface, or may be other shapes that can be used to realize direct or indirect reflection of the light beam to the waveguide reflection exit surface.
In some embodiments, the waveguide internal reflecting surface may be a total reflecting surface (i.e., a 100% reflecting surface); in other embodiments, the waveguide internal reflecting surface is a partially reflecting surface (e.g., a 50% reflecting surface).
In some embodiments, the waveguide reflective exit face comprises at least one exit aperture. Optionally, a projected maximum aperture diameter of the exit hole to the human eye is smaller than a user pupil diameter to increase light beam energy entering the human eye in the real world, where the projected maximum aperture diameter of the exit hole to the human eye refers to a maximum aperture diameter of the exit hole projected into the human eye; optionally, the user pupil diameter may be a pupil diameter of a specific user determined for the specific user, or an average pupil aperture diameter or a minimum pupil aperture diameter of a specific population (e.g., populations of different ages, different sexes, and different regions) determined statistically, so that the reflective folded waveguide display system may be customized for the specific user or the specific population to meet personalized needs of the user. In some embodiments, the maximum aperture diameter of the projection from the exit hole to the human eye is smaller than 2mm, and the maximum aperture diameter of the projection from the exit hole to the human eye is limited to be within 2mm, so that the maximum aperture diameter of the projection from the exit hole to the human eye is smaller than or substantially smaller than the pupil diameter of the human eye of all people (the pupil diameter of the human eye is usually 2mm-6mm), thereby enabling the human eye to clearly image a focal plane with any depth for all people, realizing large depth of field and multi-focal plane display, and improving the light beam energy entering the human eye from the outside world.
In some embodiments, the shape of the exit aperture may be any of a circle, an ellipse, or a polygon (e.g., a regular hexagon); when one exit hole is polygonal in shape, the maximum aperture diameter of the exit hole is the maximum value of the distance between any two points on the polygon. It should be noted that the shape of the exit aperture may be other than circular or polygonal, and any exit aperture shape that can be used to constrain a light beam into a beamlet is intended to be included in the scope of the present application.
Optionally, when the waveguide reflective exit surface includes a plurality of exit holes, the maximum aperture diameters and shapes of the projections of the plurality of exit holes may be the same or partially the same or different from each other, and the distances between every two adjacent exit holes may be the same or different; the plurality of exit holes may be arranged in any feasible manner, such as in a specific arrangement (e.g., in a transverse arrangement at equal intervals) or in a combination of arrangements.
It should be noted that, the number of the exit holes, the maximum projection aperture diameter, the shape, the distance, and the arrangement mode provided on the waveguide reflection exit surface are not limited in the present application, and in practical applications, the number of the exit holes, the maximum projection aperture diameter, the shape, the distance, and the arrangement mode may be designed based on practical requirements of users or products.
In some embodiments, the waveguide reflective exit face may be a fully reflective face (i.e., a 100% reflective face); in other embodiments, the waveguide reflective exit surface is a partially reflective surface (e.g., a 50% reflective surface).
In some embodiments, light from a display image source is reflected from the waveguide substrate onto the waveguide internal reflection surface, then reflected from the waveguide internal reflection surface onto the waveguide substrate, then reflected from the waveguide substrate onto the waveguide reflection exit surface, and then directly reflected from the waveguide reflection exit surface to a human eye. Wherein light beams from a display image source are reflected to the waveguide internal reflection surface after being emitted on the waveguide substrate for one or more times. The light beam is reflected to the waveguide inner emission surface, then reflected to the waveguide substrate from the waveguide inner emission surface, and reflected to the waveguide reflection emergent surface after one or more times of reflection on the waveguide substrate.
In some embodiments, light beams from a display image source are reflected from the waveguide substrate onto the waveguide internal reflection surface, then reflected from the waveguide internal reflection surface directly onto the waveguide reflection exit surface, and then reflected from the waveguide reflection exit surface directly to a human eye. Wherein light beams from a display image source are reflected to the waveguide internal reflection surface after being emitted on the waveguide substrate for one or more times.
In some embodiments, the reflective folded waveguide display system has a thickness of less than 10 mm. It should be noted that the reflective folded waveguide can realize a glasses type display system due to its compact structure and small volume.
Optionally, the reflective folded waveguide display system may be used in a head-mounted device. Wherein the head-mounted device includes, but is not limited to, a VR (Virtual Reality) head-mounted device, an AR (Augmented Reality) head-mounted device, and an MR (Mixed Reality) head-mounted device.
According to the reflection folding waveguide display system, the human eyes can naturally focus to the focal planes with different distances, the large-depth-of-field and multi-focal-plane display is realized, the convergence conflict of the human eyes is solved, and the visual fatigue is relieved; in addition, the reflection folding waveguide display system has a compact structure and a small volume, can be used for realizing a compact glasses type display system, and can improve the light beam energy entering human eyes from the outside world in the display system.
Fig. 1 is a schematic diagram illustrating a structure of a reflective folded waveguide display system according to an example of the present application, and fig. 2 is a side view illustrating a partial structure of the reflective folded waveguide display system shown in fig. 1. As can be seen from fig. 1 and 2, the reflective folded waveguide display system includes a display image source 1, a waveguide substrate 2, a waveguide internal reflection surface 3, and a waveguide reflection exit surface 4, wherein the waveguide internal reflection surface 3 is spherical, the waveguide reflection exit surface 4 includes three exit holes arranged laterally, each exit hole is circular, the maximum aperture diameter of the projection to human eyes is smaller than 2mm, and the distances between the exit holes are equal. Light beams emitted from the display image source 1 are incident on the waveguide substrate 2, the waveguide substrate 2 reflects the light beams to the waveguide internal reflection surface 3, the waveguide internal reflection surface 3 reflects the light beams to the waveguide reflection emergent surface 4, and the waveguide reflection emergent surface 4 reflects the light beams to human eyes. If the reflection folding waveguide display system is applied to the AR display system, the maximum aperture diameter of the projection from each exit hole to human eyes is smaller than the pupil diameter of the human eyes, so that the human eyes can clearly image focal planes with any depth, large depth of field and multi-focal plane display are realized, the problem of convergence conflict of the focusing of the AR display human eyes can be solved, the compact glasses type AR display system is realized, and the light beam energy entering the human eyes from the external world in the AR display system is improved.
It is noted that although the subject matter of the present application has been described in language specific to structural features, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features described above. Rather, the specific features described above are disclosed as example forms of implementing the claims.
It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. A plurality of units or means recited in the system claims may also be implemented by one unit or means in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.
Claims (11)
1. A reflective folded waveguide display system, wherein the reflective folded waveguide display system comprises a display image source, a waveguide substrate, a waveguide internal reflection surface and a waveguide reflective exit surface, the waveguide substrate is used for reflecting light beams from the display image source onto the waveguide internal reflection surface, the waveguide internal reflection surface is used for reflecting the light beams onto the waveguide reflective exit surface, and the waveguide reflective exit surface is used for directly reflecting the light beams to human eyes.
2. The reflective folded waveguide display system of claim 1, wherein the waveguide substrate surface is coated with a reflective film.
3. The reflective folded waveguide display system of claim 1, wherein the waveguide substrate is a planar or curved substrate.
4. The reflective folded waveguide display system of claim 1, wherein the waveguide internal reflection surface is shaped as any one of:
-a plane;
-a spherical surface;
-an aspherical surface;
-a free-form surface.
5. The reflective folded waveguide display system of any of claims 1 to 4, wherein the waveguide reflective exit face comprises at least one exit aperture.
6. The reflective folded waveguide display system of claim 5, wherein a projected maximum aperture diameter of the exit aperture to the human eye is less than 2 mm.
7. The reflective folded waveguide display system of claim 5, wherein the exit aperture is shaped as any one of:
-circular;
-an ellipse;
-a polygon.
8. The reflective folded waveguide display system of claim 1, wherein the waveguide internal reflecting surface and the waveguide reflective exit surface are fully reflecting surfaces or partially reflecting surfaces.
9. The reflective folded waveguide display system of claim 1, wherein light beams from a display image source are reflected from the waveguide substrate onto the waveguide internal reflection surface, from the waveguide internal reflection surface onto the waveguide substrate, from the waveguide substrate onto the waveguide reflective exit surface, and from the waveguide reflective exit surface directly onto a human eye.
10. The reflective folded waveguide display system of claim 1, wherein light beams from a display image source are reflected from the waveguide substrate onto the waveguide internal reflection surface, then reflected from the waveguide internal reflection surface directly onto the waveguide reflective exit surface, and then reflected from the waveguide reflective exit surface directly to the human eye.
11. The reflective folded waveguide display system of claim 1, wherein the reflective folded waveguide display system is less than 10mm thick.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911061708.7A CN111624768A (en) | 2019-11-01 | 2019-11-01 | Reflection folding waveguide display system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911061708.7A CN111624768A (en) | 2019-11-01 | 2019-11-01 | Reflection folding waveguide display system |
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| CN111624768A true CN111624768A (en) | 2020-09-04 |
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| CN201911061708.7A Pending CN111624768A (en) | 2019-11-01 | 2019-11-01 | Reflection folding waveguide display system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112130332A (en) * | 2020-10-28 | 2020-12-25 | 南京爱奇艺智能科技有限公司 | Augmented reality display structure and AR equipment applying same |
| CN112147786A (en) * | 2020-10-28 | 2020-12-29 | 南京爱奇艺智能科技有限公司 | Augmented reality display system |
| CN115185087A (en) * | 2022-07-19 | 2022-10-14 | 深圳禹润和显示科技有限公司 | Augmented reality device |
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| KR20180028339A (en) * | 2016-09-08 | 2018-03-16 | 주식회사 레티널 | Optical device |
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| US20150177519A1 (en) * | 2013-12-19 | 2015-06-25 | Google Inc. | See-through eyepiece for head wearable display |
| CN109076209A (en) * | 2016-03-18 | 2018-12-21 | 株式会社籁天那 | Augmented reality realization device with depth adjustment function |
| KR20180028339A (en) * | 2016-09-08 | 2018-03-16 | 주식회사 레티널 | Optical device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112130332A (en) * | 2020-10-28 | 2020-12-25 | 南京爱奇艺智能科技有限公司 | Augmented reality display structure and AR equipment applying same |
| CN112147786A (en) * | 2020-10-28 | 2020-12-29 | 南京爱奇艺智能科技有限公司 | Augmented reality display system |
| CN112147786B (en) * | 2020-10-28 | 2024-04-12 | 南京爱奇艺智能科技有限公司 | Augmented reality display system |
| CN115185087A (en) * | 2022-07-19 | 2022-10-14 | 深圳禹润和显示科技有限公司 | Augmented reality device |
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