CN113433622A - High light efficiency grating waveguide element - Google Patents
High light efficiency grating waveguide element Download PDFInfo
- Publication number
- CN113433622A CN113433622A CN202110704294.6A CN202110704294A CN113433622A CN 113433622 A CN113433622 A CN 113433622A CN 202110704294 A CN202110704294 A CN 202110704294A CN 113433622 A CN113433622 A CN 113433622A
- Authority
- CN
- China
- Prior art keywords
- grating
- incident
- rotary
- turning
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 48
- 239000000758 substrate Substances 0.000 claims abstract description 39
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000003190 augmentative effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- -1 carrier Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/34—Optical coupling means utilising prism or grating
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Integrated Circuits (AREA)
Abstract
The invention discloses a high light efficiency grating waveguide component, comprising: the optical grating comprises an optical substrate, a grating waveguide structure and an incident rotary grating; the grating waveguide structure and the incident rotary grating are respectively arranged on the surface of the optical substrate; the incident rotary grating is arranged at the outer side of the incident grating of the grating waveguide structure at intervals and forms an incident overflow diffraction light rotary light path together with the incident grating. The incident rotary grating is arranged on one side without other gratings outside the incident grating, so that the light efficiency of the whole device is improved, the influence of stray light on the performance of the device is avoided, the structure is relatively simple, the cost is low, the improvement effect is obvious, and the influence on the volume of the device is small.
Description
Technical Field
The invention relates to the field of grating waveguide elements, in particular to a high-light-efficiency grating waveguide element.
Background
The near-eye display device is a main device applied to virtual reality and augmented reality technologies, the display of the near-eye display device can be realized through a grating waveguide device, the grating waveguide device realizes the incidence, turning and emergence of light rays by using a diffraction grating, the light transmission is realized by using a total reflection principle, and an image of a micro display is transmitted to human eyes so as to see a virtual image. The grating waveguide display has many advantages of good perspective effect, light weight, thin weight, low mass production cost and the like, and is considered as the development direction of the AR near-eye display technology, and the existing grating waveguide device still has the problem that the light energy utilization efficiency needs to be improved.
The current grating waveguide device mainly comprises an optical substrate and a grating (see fig. 1) on the surface of the optical substrate, the optical substrate is usually a planar structure made of optical materials, such as an optical glass plate, an optical plastic plate, etc., the optical substrate generally has two surfaces parallel to each other as optical surfaces, the grating is disposed on one surface of the optical substrate, and the grating generally has three regions, i.e., an incident grating 112, a turning grating 114 and an exit grating 116. In the operation principle of the conventional grating waveguide device illustrated in fig. 2, a light ray 214 with image information from the projection system 210 is projected onto the incident grating 112, the incident grating 112 will diffract to generate two diffracted lights, a-1 st order diffracted light 216 and a +1 st order diffracted light 218, when the diffracted lights satisfy the total reflection condition of the optical substrate, i.e. the angle of the incident light to the optical surface of the optical substrate is greater than the critical angle of total reflection of the optical substrate, the light beam will be totally reflected and will be transmitted in the optical substrate almost without loss, the-1 st order diffracted light 216 will be transmitted toward the-y direction, i.e. the turning grating 114, when the light is incident to the area of the turning grating 114, due to the diffraction effect of the turning grating 114, a series of diffracted lights will be transmitted toward the exit grating 116 while continuing to be transmitted in the-y direction, and these lights are transmitted to the exit grating 116, after being diffracted by the exit grating 116, the exit diffracted light 222 enters the human eye 212 to be perceived, and the reverse diffracted light 220 no longer satisfies the total reflection condition of the optical substrate and is led out of the optical substrate to leak to the surrounding environment, the +1 st order diffracted light 218 generated by the incident grating 112 is transmitted toward the + y direction and cannot be transmitted to the turning grating 114 and the exit grating 116, so that the +1 st order diffracted light cannot be effectively utilized, and a part of the overflow diffracted light may also become stray light of the system, which affects the performance of the device.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a high-light-efficiency grating waveguide element, which can improve light efficiency by utilizing +1 st-order diffraction light generated by an incident grating and simultaneously prevent the part of diffraction light from becoming stray light to influence the performance of a device, thereby solving the technical problems in the prior art.
The purpose of the invention is realized by the following technical scheme:
an embodiment of the present invention provides a high light efficiency grating waveguide device, including:
the optical grating comprises an optical substrate, a grating waveguide structure and an incident rotary grating; wherein,
the grating waveguide structure and the incident rotary grating are respectively arranged on the surface of the optical substrate;
the incident rotary grating is arranged at the outer side of the incident grating of the grating waveguide structure at intervals and forms an incident overflow diffraction light rotary light path together with the incident grating.
Compared with the prior art, the high-light-efficiency grating waveguide element provided by the invention at least has the following beneficial effects:
the incident rotary grating is arranged on one side of the incident grating, so that diffracted light which is transmitted into and out of the incident grating and cannot be transmitted to the exit grating is diffracted back again and transmitted to the exit grating, diffracted light towards the human eye direction is generated, the energy utilization rate is improved, and meanwhile, the influence of stray light caused by the part of light on the device performance is avoided; in addition, because the incident rotary grating is arranged on one side of the incident grating, the grating waveguide element with the structure has simpler structure and manufacturing process compared with the existing scheme of improving the energy utilization rate by using a complex incident grating structure.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a grating waveguide device provided in the prior art;
FIG. 2 is a schematic diagram of the operation of a prior art grating waveguide device;
FIG. 3 is a schematic structural diagram of a high-light-efficiency grating waveguide device according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating the operation of a high-light-efficiency grating waveguide device according to an embodiment of the present invention;
FIG. 5 is a schematic plan view of an embodiment of a high optical efficiency grating waveguide device according to the present invention;
FIG. 6 is a schematic diagram of a high-light-efficiency grating waveguide device according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a high light efficiency grating waveguide device according to an embodiment of the present invention.
Detailed Description
The technical scheme in the embodiment of the invention is clearly and completely described below by combining the attached drawings in the embodiment of the invention; it is to be understood that the described embodiments are merely exemplary of the invention, and are not intended to limit the invention to the particular forms disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The terms that may be used herein are first described as follows:
the term "and/or" means that either or both can be achieved, for example, X and/or Y means that both cases include "X" or "Y" as well as three cases including "X and Y".
The terms "comprising," "including," "containing," "having," or other similar terms of meaning should be construed as non-exclusive inclusions. For example: including a feature (e.g., material, component, ingredient, carrier, formulation, material, dimension, part, component, mechanism, device, process, procedure, method, reaction condition, processing condition, parameter, algorithm, signal, data, product, or article of manufacture), is to be construed as including not only the particular feature explicitly listed but also other features not explicitly listed as such which are known in the art.
The term "consisting of … …" is meant to exclude any technical feature elements not explicitly listed. If used in a claim, the term shall render the claim closed except for the inclusion of the technical features that are expressly listed except for the conventional impurities associated therewith. If the term occurs in only one clause of the claims, it is defined only to the elements explicitly recited in that clause, and elements recited in other clauses are not excluded from the overall claims.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured," etc., are to be construed broadly, as for example: can be fixedly connected, can also be 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 herein can be understood by those of ordinary skill in the art as appropriate.
The terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in an orientation or positional relationship that is indicated based on the orientation or positional relationship shown in the drawings for ease of description and simplicity of description only, and are not intended to imply or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting herein.
The high light efficiency grating waveguide device provided by the present invention is described in detail below. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art. Those not specifically mentioned in the examples of the present invention were carried out according to the conventional conditions in the art or conditions suggested by the manufacturer. The reagents or instruments used in the examples of the present invention are not specified by manufacturers, and are all conventional products available by commercial purchase.
As shown in fig. 3 to 5, an embodiment of the present invention provides a high light efficiency grating waveguide device, including:
the optical grating comprises an optical substrate, a grating waveguide structure and an incident rotary grating; wherein,
the grating waveguide structure and the incident rotary grating are respectively arranged on the surface of the optical substrate;
the incident rotary grating is arranged at the outer side of the incident grating of the grating waveguide structure at intervals and forms an incident overflow diffraction light rotary light path together with the incident grating.
In the grating waveguide element, the grating period of the incident rotary grating is half of the grating period of the incident grating;
the groove direction of the incident rotary grating is parallel to the groove direction of the incident grating.
The incident rotary grating with the structure enables the directions of the rotary diffraction light 420 and the-1 st order diffraction light 416 diffracted by the incident rotary grating to be the same, so that the directions of the second emergent diffraction light 430 and the first emergent diffraction light 426 are also the same, and the directions of the third reverse diffraction light 428 and the first reverse diffraction light 424 are also the same, thereby realizing the effective utilization of the +1 st order diffraction light 418 at the incident end, improving the light efficiency of the whole element, and avoiding the influence of stray light on the device performance.
Referring to fig. 3, in the above-mentioned grating waveguide component, the grating waveguide structure includes:
the incident grating, the turning grating and the emergent grating; wherein,
the incident grating, the turning grating and the emergent grating are arranged on the same surface or different surfaces of the optical substrate;
the incident grating is arranged on one side of the turning grating at intervals;
the emergent grating is arranged on the side surface of the turning grating at intervals.
In the grating waveguide component, the incident grating, the turning grating and the exit grating are arranged on the same surface or different surfaces of the optical substrate in an L shape or a reverse L shape (see fig. 3);
alternatively, the incident grating, the turning grating and the exit grating are arranged on the same surface or different surfaces of the optical substrate in a straight line (see fig. 6).
In the grating waveguide element, the incident rotary grating is located at the opposite side of the turning grating, and the incident rotary grating and the turning grating sandwich the incident grating.
Referring to fig. 7, in the above-mentioned grating waveguide component, the grating waveguide structure includes:
an incident grating and a two-dimensional exit grating; wherein,
the incident grating and the two-dimensional emergent grating are arranged on the same surface or different surfaces of the optical substrate at intervals.
In the grating waveguide element, the incident rotary grating is located at the opposite side of the two-dimensional exit grating, and the incident grating and the two-dimensional exit grating sandwich the incident grating.
In the grating waveguide element, the incident rotary grating is any one of a rectangular grating, a trapezoidal grating, an inclined grating and a blazed grating.
In the grating waveguide element, the incident rotary grating and the grating waveguide structure are located on the same surface or different surfaces of the optical substrate.
In order to more clearly show the technical solutions and the technical effects provided by the present invention, the method for forming a high-light-efficiency grating waveguide device according to the embodiments of the present invention is described in detail with specific embodiments below.
Example 1
As shown in fig. 3, the high light efficiency grating waveguide device provided by the embodiment of the present invention mainly includes an optical substrate and a grating located on a surface of the optical substrate; wherein the grating is divided into four regions: an incident grating 312, an incident return grating 314, a return grating 316, and an exit grating 318; as shown in fig. 4 and 5, the incident grating 312 is used to guide the virtual image beam 414 emitted from the projection system 410 into the grating waveguide component 300, the incident grating 312 diffracts the incident beam 414 toward two approximately opposite directions, and a portion of the incident beam is transmitted toward the region of the turning grating 316 (-1 st order diffraction beam 416) and is diffracted by the turning grating 316 to generate a diffracted beam transmitted toward the exit grating 318; the diffracted beam is transmitted to the exit grating 318, and after being diffracted by the exit grating 318, the first exit diffracted light 426 is generated to enter the human eyes 412 to be perceived, and the first reverse diffracted light 424 is guided out of the optical substrate without meeting the total reflection condition of the optical substrate and leaks to the surrounding environment; the incident grating 312 transmits another part of the diffracted light (+1 st order diffracted light 418) to the incident rotary grating 314 area, and is diffracted by the incident rotary grating 314 to generate rotary diffracted light 420 transmitted to the-y direction; the rotary diffraction light 420 is transmitted along the-y direction, transmitted to the incident grating 312, diffracted by the incident grating 312 to generate second reverse diffraction light 422, and the second reverse diffraction light 422 no longer meets the total reflection condition of the optical substrate, is guided out of the optical substrate and leaks to the surrounding environment; the generated rotary diffracted light 420 is continuously transmitted along the-y direction, transmitted to the turning grating 316, diffracted by the turning grating 316, and generates a diffracted light beam transmitted towards the exit grating 318, the diffracted light beam is transmitted to the exit grating 318, and after being diffracted by the exit grating 318, a second exit diffracted light 430 is generated and enters the human eye 412 to be perceived, and a third reverse diffracted light 428 no longer satisfies the total reflection condition of the optical substrate and is led out of the optical substrate to be leaked to the surrounding environment.
In the grating waveguide element, the-1 st order diffracted light 416 is obtained by the incident light beam 414 being diffracted by the incident grating 312, and the polar angle θ thereof416And azimuth angle phi416Given by the grating equation:
nwis the refractive index of the optical substrate, nsIs the refractive index of the surrounding environment, λ is the wavelength of the incident light, dIIs the grating period, θ, of the incident grating 312414And phi414Is the polar and azimuthal angles of the incident beam 414.
The rotary diffraction light 420 is obtained by the incident beam 414 diffracted by the incident grating 312 and the incident rotary grating 314, and the incident beam 414 diffracted by the incident grating 312 has the polar angle theta of the +1 st order diffraction light 418418And azimuth angle phi418Comprises the following steps:
the +1 st order diffracted light 418 is diffracted by the incident rotary grating 314 to generate a polar angle theta of the rotary diffracted light 420420And azimuth angle phi420Comprises the following steps:
dRis the grating period of the incident rotating grating 314.
From formula (1), formula (3) and formula (5):
from formula (2), formula (4) and formula (6):
when d isI＝2dRWhen, equation (7) becomes:
in this case, the formula (8) and the formula (9) are obtained simultaneously, and θ420＝θ416，
Therefore, when the grating period of the incident rotated grating 314 is half of the grating period of the incident grating 312, the directions of the rotated diffracted light 420 and the-1 st order diffracted light 416 will be the same. Thus, the direction of the second emitted diffracted light 430 will be the same as the direction of the first emitted diffracted light 426, and the direction of the third oppositely diffracted light 428 will be the same as the direction of the first oppositely diffracted light 424. In this structure, the directions of the rotary diffraction light 420 and the-1 st order diffraction light 416 are the same, so that the plus or minus 1 st order diffraction light generated by the incident grating can be effectively utilized, the effects of generating stray light, image ghosting and the like are avoided, and the optical performance of the grating waveguide element is ensured.
In the grating waveguide element structure of the present invention, the incident rotary grating is provided on the incident grating side, so that diffracted light which is transmitted into and out of the incident grating and cannot be transmitted to the exit grating is diffracted back again and transmitted to the exit grating, thereby generating diffracted light in the direction of the human eye and improving the light utilization rate. And because the incident rotary grating is arranged on one side of the incident grating to improve the energy utilization rate, compared with the existing scheme of improving the energy utilization rate by using a complex incident grating structure, the structure and the manufacturing process are simpler.
The types of the gratings in the waveguide are not limited, and the incident grating, the incident rotary grating, the turning grating and the emergent grating can adopt grating structures such as a rectangular grating, a trapezoidal grating, an inclined grating, a blazed grating and the like. The grating period and grating area shape, size and size of the incident grating, the turning grating and the emergent grating can be optimized according to the requirement.
The specific number and distribution of the incident grating, the turning grating, and the exit grating may be arbitrary, such as the grating waveguide element of fig. 6 (in fig. 6, 600 is the grating waveguide element, 612 is the incident grating, 614 is the incident turning grating, 616 is the turning grating, 618 is the exit grating, each grating is arranged in a straight line) and the two-dimensional grating waveguide element of fig. 7 (in fig. 7, 712 is the incident grating, 714 is the incident turning grating, and 716 is the two-dimensional exit grating), as long as there is no other grating structure on one side where light is transmitted out of the incident grating, the incident turning grating may be set to improve the light utilization rate.
The shape, size and size of the grating area of the incident rotary grating can be optimized according to requirements, the grating period of the incident rotary grating is half of that of the incident grating, and the direction of the grating line groove is parallel to that of the incident grating.
The incident rotary grating and the incident grating may be located on the same surface or different surfaces of the waveguide substrate, and the incident rotary grating and the incident grating may operate in a transmission mode or a reflection mode simultaneously, or in a transmission mode and a reflection mode respectively.
In summary, the grating waveguide element in the embodiment of the present invention improves the light efficiency of the entire device by disposing the incident rotary grating on the side without other gratings outside the incident grating, and also avoids the stray light from affecting the device performance.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Claims (9)
1. A high light efficiency grating waveguide element comprising:
the optical grating comprises an optical substrate, a grating waveguide structure and an incident rotary grating; wherein,
the grating waveguide structure and the incident rotary grating are respectively arranged on the surface of the optical substrate;
the incident rotary grating is arranged at the outer side of the incident grating of the grating waveguide structure at intervals and forms an incident overflow diffraction light rotary light path together with the incident grating.
2. The high light efficiency grating waveguide element of claim 1 wherein the grating period of the incident rotating grating is half of the grating period of the incident grating;
the groove direction of the incident rotary grating is parallel to the groove direction of the incident grating.
3. A high light efficiency grating waveguide element as claimed in claim 1 or 2, wherein the grating waveguide structure comprises:
the incident grating, the turning grating and the emergent grating; wherein,
the incident grating, the turning grating and the emergent grating are arranged on the same surface or different surfaces of the optical substrate;
the incident grating is arranged on one side of the turning grating at intervals;
the emergent grating is arranged on the side surface of the turning grating at intervals.
4. The high light efficiency grating waveguide element of claim 3, wherein the incident grating, the turning grating and the exit grating are arranged in a straight line on the same surface or different surfaces of the optical substrate;
or the incident grating, the turning grating and the exit grating are arranged on the same surface or different surfaces of the optical substrate in an L shape or a reverse L shape.
5. The high light efficiency grating waveguide element of claim 3, wherein the incident return grating is on an opposite side of the turning grating, the incident return grating and the turning grating sandwiching the incident grating.
6. A high light efficiency grating waveguide element as claimed in claim 1 or 2, wherein the grating waveguide structure comprises:
an incident grating and a two-dimensional exit grating; wherein,
the incident grating and the two-dimensional emergent grating are arranged on the same surface or different surfaces of the optical substrate at intervals.
7. The high light efficiency grating waveguide element of claim 6 wherein the entrance turning grating is on an opposite side of the two dimensional exit grating, the entrance turning grating and the two dimensional exit grating sandwiching the entrance grating.
8. The high light efficiency grating waveguide element of claim 1 or 2, wherein the incident rotary grating employs any one of a rectangular grating, a trapezoidal grating, an inclined grating, and a blazed grating.
9. The high light efficiency grating waveguide element of claim 1 or 2, wherein the incident turning grating and grating waveguide structure are on the same surface or different surfaces of the optical substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110704294.6A CN113433622A (en) | 2021-06-24 | 2021-06-24 | High light efficiency grating waveguide element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110704294.6A CN113433622A (en) | 2021-06-24 | 2021-06-24 | High light efficiency grating waveguide element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113433622A true CN113433622A (en) | 2021-09-24 |
Family
ID=77753926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110704294.6A Pending CN113433622A (en) | 2021-06-24 | 2021-06-24 | High light efficiency grating waveguide element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113433622A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114137650A (en) * | 2021-11-12 | 2022-03-04 | 江西凤凰光学科技有限公司 | Diffraction optical waveguide device with zero-order light recycling function |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180210205A1 (en) * | 2014-08-03 | 2018-07-26 | Wave Optics Ltd | Exit pupil expanding diffractive optical waveguiding device |
| CN109313339A (en) * | 2016-06-13 | 2019-02-05 | 微软技术许可有限责任公司 | By reduce nearly eye show in spatial coherence avoid interference with |
| CN111323920A (en) * | 2020-03-12 | 2020-06-23 | 深圳市光舟半导体技术有限公司 | Novel diffraction light waveguide for AR display |
| CN212433446U (en) * | 2020-07-14 | 2021-01-29 | 深圳珑璟光电科技有限公司 | Optical waveguide and near-to-eye display system |
| CN112987180A (en) * | 2021-03-30 | 2021-06-18 | 维沃移动通信有限公司 | Diffraction waveguide and electronic device |
-
2021
- 2021-06-24 CN CN202110704294.6A patent/CN113433622A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180210205A1 (en) * | 2014-08-03 | 2018-07-26 | Wave Optics Ltd | Exit pupil expanding diffractive optical waveguiding device |
| CN109313339A (en) * | 2016-06-13 | 2019-02-05 | 微软技术许可有限责任公司 | By reduce nearly eye show in spatial coherence avoid interference with |
| CN111323920A (en) * | 2020-03-12 | 2020-06-23 | 深圳市光舟半导体技术有限公司 | Novel diffraction light waveguide for AR display |
| CN212433446U (en) * | 2020-07-14 | 2021-01-29 | 深圳珑璟光电科技有限公司 | Optical waveguide and near-to-eye display system |
| CN112987180A (en) * | 2021-03-30 | 2021-06-18 | 维沃移动通信有限公司 | Diffraction waveguide and electronic device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114137650A (en) * | 2021-11-12 | 2022-03-04 | 江西凤凰光学科技有限公司 | Diffraction optical waveguide device with zero-order light recycling function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11474394B2 (en) | Electronic device with pattern detection function | |
| US7453612B2 (en) | Optical device, and virtual image display | |
| JP5718765B2 (en) | Optical device using a two-groove diffraction grating. | |
| CN109799568B (en) | Backlight module and display device | |
| CN113075793B (en) | Display device and method of operating the same | |
| US20110051041A1 (en) | Backlight unit and liquid crystal display device | |
| CN215678840U (en) | Grating waveguide element capable of improving light-emitting uniformity | |
| CN215813552U (en) | Optical waveguide system and display device | |
| CN112987164B (en) | Optical waveguide assembly and head-mounted display device | |
| JP2006351485A (en) | Lighting system and display device | |
| CN215494216U (en) | Waveguide structure and augmented reality display device | |
| CN112965167A (en) | High-efficiency grating waveguide optical element | |
| CN113325505A (en) | Optical waveguide lens and three-dimensional display device | |
| CN211928226U (en) | Optical waveguide lens and three-dimensional display device | |
| CN113433622A (en) | High light efficiency grating waveguide element | |
| CN110286494A (en) | Optical waveguide unit, array and flat-plate lens | |
| KR20220054876A (en) | Two-dimensional optical waveguides, virtual and real optical wave combiners, and AR devices | |
| KR102601442B1 (en) | Holographic Waveguide | |
| CN218567743U (en) | Optical device and near-to-eye display apparatus | |
| US20240159964A1 (en) | Display structure and display device | |
| CN216248597U (en) | Diffraction grating waveguide element | |
| CN113433621A (en) | High-efficiency grating waveguide element | |
| CN114415376A (en) | Display device and virtual reality display equipment | |
| CN115509006A (en) | Optical device and electronic device | |
| JP6084797B2 (en) | Surface light source device and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210924 |
|
| RJ01 | Rejection of invention patent application after publication |