CN111458880B - Waveguide light field display device and head-mounted augmented reality glasses - Google Patents
Waveguide light field display device and head-mounted augmented reality glasses Download PDFInfo
- Publication number
- CN111458880B CN111458880B CN202010385116.7A CN202010385116A CN111458880B CN 111458880 B CN111458880 B CN 111458880B CN 202010385116 A CN202010385116 A CN 202010385116A CN 111458880 B CN111458880 B CN 111458880B
- Authority
- CN
- China
- Prior art keywords
- coupling
- waveguide lens
- waveguide
- units
- display device
- 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.)
- Active
Links
- 230000003190 augmentative effect Effects 0.000 title claims abstract description 15
- 239000011521 glass Substances 0.000 title claims abstract description 13
- 230000003287 optical effect Effects 0.000 claims abstract description 79
- 239000004973 liquid crystal related substance Substances 0.000 claims description 17
- 238000010168 coupling process Methods 0.000 claims description 14
- 238000005859 coupling reaction Methods 0.000 claims description 14
- 230000008878 coupling Effects 0.000 claims description 2
- 230000000875 corresponding effect Effects 0.000 description 13
- 210000001747 pupil Anatomy 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 208000002173 dizziness Diseases 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 210000001525 retina Anatomy 0.000 description 3
- 230000002596 correlated effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000005276 holographic polymer dispersed liquid crystals (HPDLCs) Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
The application provides a waveguide light field display device and wear-type augmented reality glasses, wherein, this waveguide light field display device includes: the device comprises a waveguide lens, a plurality of coupling-in units, a coupling-out unit and a plurality of optical machines, wherein the number of the coupling-in units is equal to that of the optical machines; the waveguide lens is in a curved surface shape, and the focal point of the curved surface is positioned on the same side of the waveguide lens; the coupling-out unit is positioned at one side of the waveguide lens; the plurality of coupling-in units are positioned on one side of the waveguide lens, orthographic projections of the plurality of coupling-in units on the waveguide lens are uniformly distributed along the circumference, and the orthographic projections of the coupling-out units on the waveguide lens are surrounded by a circle formed by the orthographic projections of the plurality of coupling-in units on the waveguide lens; the coupling-in unit corresponds to the optical machine, parallel light beams emitted by the optical machine can enter the waveguide lens through the corresponding coupling-in unit, and the refraction angle of the parallel light beams emitted by the optical machine when the parallel light beams enter the waveguide lens is larger than the total reflection critical angle of the waveguide lens.
Description
Technical Field
The application relates to the technical field of image display, in particular to a waveguide light field display device and head-mounted augmented reality glasses.
Background
The waveguide optical field display device can realize an augmented reality technology, the waveguide optical field display device comprises a waveguide lens, in the working process of the waveguide optical field display device, light rays transmitted inside the waveguide lens can be guided out of the waveguide lens, and the guided light rays can be imaged on retinas of human eyes, so that a user can observe a three-dimensional virtual image.
The waveguide lens in the existing waveguide optical field display device is a flat waveguide lens, and light guided out from the waveguide lens is perpendicular to the waveguide lens, so that the waveguide lens is oversized under the condition of a large field angle, and is not beneficial to being worn by a user.
Disclosure of Invention
In view of this, embodiments of the present application provide a waveguide light field display device and head-mounted augmented reality glasses, which are used to improve the situation that the size of a waveguide lens is too large when the field angle is large.
In a first aspect, an embodiment of the present application provides a waveguide light field display device, including:
the optical-mechanical coupling device comprises a waveguide lens, a plurality of coupling-in units, a coupling-out unit and a plurality of optical machines, wherein the number of the coupling-in units is equal to that of the optical machines;
the waveguide lens is in a curved surface shape, and the focal points of the curved surface are positioned on the same side of the waveguide lens;
the coupling-out unit is positioned at one side of the waveguide lens;
the plurality of the coupling-in units are positioned on one side of the waveguide lens, orthographic projections of the plurality of the coupling-in units on the waveguide lens are uniformly distributed along the circumference, and the orthographic projections of the coupling-out units on the waveguide lens are surrounded by a circle formed by the orthographic projections of the plurality of the coupling-in units on the waveguide lens;
one coupling-in unit corresponds to one optical machine, parallel light beams emitted by the optical machine can enter the waveguide lens through the corresponding coupling-in unit, and the refraction angle of the parallel light beams emitted by the optical machine when entering the waveguide lens is larger than the total reflection critical angle of the waveguide lens.
Optionally, the orthographic projection of the coupling-out unit on the waveguide lens is circular.
Optionally, the coupling-out unit includes a plurality of sub-coupling-out units, an orthographic projection of each sub-coupling-out unit on the waveguide lens is a circle, and the orthographic projections of the plurality of sub-coupling-out units on the waveguide lens are distributed in concentric circles.
Optionally, the density of concentric circles formed by orthographic projections of the sub-coupling-out units on the waveguide lens is uniformly distributed.
Optionally, the density of concentric circles formed by orthographic projections of the sub-coupling-out units on the waveguide lens is gradually reduced along a direction away from the center of the circle.
Optionally, the pixel point corresponding to the coupling-out unit includes an open state and a closed state, the optical machine is in a normally open state, and the intensity of the parallel light beam emitted by the optical machine is a variable parallel light beam.
Optionally, a polarizing filter is disposed on one side of the coupling-out unit close to the focus, a liquid crystal light valve is disposed between the coupling-out unit and the polarizing filter, each pixel point corresponding to the coupling-out unit corresponds to one liquid crystal light valve, the optical machine is in a normally open state, and the intensity of the parallel light beams emitted by the optical machine is unchanged.
Optionally, a liquid crystal light valve is disposed on one side of the coupling-out unit close to the focus, a polarizing filter is disposed between the optical machine and the coupling-in unit, the optical machine is in a normally open state, and the intensity of the parallel light beams emitted by the optical machine is unchanged.
Optionally, the coupling-out unit is located on one side of the waveguide lens close to the focal point, and the plurality of coupling-in units and the coupling-out unit are located on the same side of the waveguide lens.
In a second aspect, embodiments of the present application provide head-mounted augmented reality glasses, including the waveguide light field display device according to any one of the first aspect.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
in the present application, a waveguide light field display device includes: waveguide lens, a plurality of coupling-in units, coupling-out unit and a plurality of ray apparatus, wherein, the shape of waveguide lens is the curved surface, and the focus of this curved surface lies in the same side of waveguide lens, promptly: the waveguide lens is designed in a single-curved-surface shape, and under the condition that the field angles are equal, the waveguide lens in the application is relatively small in size relative to a flat waveguide lens and is beneficial to wearing of a user, in order to match the design of the curved-surface waveguide lens, orthographic projections of a plurality of coupling-in units on the waveguide lens are uniformly distributed along the circumference, the orthographic projections of the coupling-out units on the waveguide lens are surrounded by circles formed by the orthographic projections of the coupling-in units on the waveguide lens, one coupling-in unit corresponds to one optical machine, parallel light beams emitted by the optical machine can enter the waveguide lens through the corresponding coupling-in unit, the refraction angle of the parallel light beams emitted by the optical machine when entering the waveguide lens is larger than the total reflection critical angle of the waveguide lens, after the design is adopted, the light emitted by the optical machine can be conducted in the waveguide lens, and the curved-surface waveguide lens can focus the light emitted by the coupling-out unit, for the flat waveguide lens, the problem of the inconsistency of convergence and focusing states in stereoscopic vision is favorably alleviated, the use comfort of a user is favorably improved, and the probability of dizziness caused by the inconsistency of the convergence and focusing states in the stereoscopic vision is reduced.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic front view of a waveguide optical field display device according to an embodiment of the present disclosure;
fig. 2 is a schematic front view of another waveguide optical field display device according to an embodiment of the present disclosure;
FIG. 3 is a schematic top view of a waveguide light field display device according to an embodiment of the present disclosure;
FIG. 4 is a schematic partial cross-sectional view taken along direction AA' of FIG. 2;
FIG. 5 is a schematic front view of another waveguide light field display device provided in the first embodiment of the present application;
FIG. 6 is a graph showing the light output density along the direction BB' in FIG. 5;
FIG. 7 is another partial cross-sectional view taken along direction AA' of FIG. 2;
FIG. 8 is another partial cross-sectional view taken along direction AA' of FIG. 2;
fig. 9 is a pair of head-mounted augmented reality glasses according to the second embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
The augmented reality technology is a technology for skillfully fusing virtual information and a real world, and a plurality of technical means such as multimedia, three-dimensional modeling, real-time tracking and registration, intelligent interaction, sensing and the like are widely applied to simulate and simulate virtual information such as characters, images, three-dimensional models, music, videos and the like generated by a computer and then image, thereby realizing the 'enhancement' of the real world.
The imaging device in the augmented reality technology comprises a waveguide light field display device, wherein the waveguide light field display device generally comprises an optical machine, a waveguide lens, an in-coupling unit and an out-coupling unit, wherein the optical machine can emit parallel light of all angles, and the in-coupling unit diffracts the parallel light of all angles to a specific angle so as to meet the condition of total reflection in the waveguide lens and enable the light to be transmitted in the waveguide lens according to the total reflection principle. The waveguide lens is provided with a coupling-out unit corresponding to the exit pupil position (light-emitting position) to couple light transmitted in the waveguide lens out of the waveguide lens and realize exit pupil expansion, i.e. expand a smaller entrance pupil into a larger exit pupil, thereby facilitating observation by a user. The parallel light output from the outcoupling unit enters the throat of a person and is imaged on the retina through the focusing of the human eyes, thereby allowing the user to observe a virtual image.
In the prior art, the waveguide lens in the waveguide optical field display device is a flat waveguide lens, and light guided out from the waveguide lens is perpendicular to the waveguide lens, so that under the condition of a large field angle, the waveguide lens is oversized, and the flat waveguide lens is not convenient for a user to wear.
In order to solve the above problem, the embodiments of the present application provide a waveguide optical field display device and head-mounted augmented reality glasses, so as to improve the situation that the size of a waveguide lens is too large when the field angle is large, and reduce the probability of causing a user to generate dizziness.
Example one
Fig. 1 is a schematic front view of a waveguide optical field display device according to a first embodiment of the present disclosure (illustrating that the coupling-out unit is a whole-surface structure), fig. 2 is a schematic front view of another waveguide optical field display device according to a first embodiment of the present disclosure (illustrating that the coupling-out unit is a concentric circle structure with uniform density distribution), fig. 3 is a schematic top view of a waveguide optical field display device according to a first embodiment of the present disclosure (only illustrating a shape of a waveguide lens and an emitting direction of light rays, the emitting direction of light rays being shown by arrows in fig. 3), as shown in fig. 1, fig. 2 and fig. 3, the waveguide lens, a plurality of coupling-in units, the coupling-out unit, and a plurality of optical machines (not shown), the number of the coupling-in units being equal to the number of the optical machines; the waveguide lens is in a curved surface shape, and the focal point (positioned at the human eye side shown in fig. 3) of the curved surface is positioned at the same side of the waveguide lens; the coupling-out unit is positioned at one side of the waveguide lens; the plurality of the coupling-in units are positioned on one side of the waveguide lens, orthographic projections of the plurality of the coupling-in units on the waveguide lens are uniformly distributed along the circumference, and the orthographic projections of the coupling-out units on the waveguide lens are surrounded by a circle formed by the orthographic projections of the plurality of the coupling-in units on the waveguide lens; one coupling-in unit corresponds to one optical machine, parallel light beams emitted by the optical machine can enter the waveguide lens through the corresponding coupling-in unit, and the refraction angle of the parallel light beams emitted by the optical machine when entering the waveguide lens is larger than the total reflection critical angle of the waveguide lens.
Specifically, as shown in fig. 1, 2 and 3, the waveguide optical field display device includes: waveguide lens, a plurality of coupling-in units, coupling-out unit and a plurality of ray apparatus, wherein, the shape of waveguide lens is the curved surface, and the focus of this curved surface lies in the same side of waveguide lens, promptly: the waveguide lens is designed in a single-curved-surface shape, and under the condition that the field angles are equal, the waveguide lens in the application is relatively small in size relative to a flat waveguide lens and is beneficial to wearing of a user, in order to match the design of the curved-surface waveguide lens, orthographic projections of a plurality of coupling-in units on the waveguide lens are uniformly distributed along the circumference, the orthographic projections of the coupling-out units on the waveguide lens are surrounded by circles formed by the orthographic projections of the coupling-in units on the waveguide lens, one coupling-in unit corresponds to one optical machine, parallel light beams emitted by the optical machine can enter the waveguide lens through the corresponding coupling-in unit, the refraction angle of the parallel light beams emitted by the optical machine when entering the waveguide lens is larger than the total reflection critical angle of the waveguide lens, after the design is adopted, the light emitted by the optical machine can be conducted in the waveguide lens, and the curved-surface waveguide lens can focus the light emitted by the coupling-out unit, for the flat waveguide lens, the problem of the inconsistency of convergence and focusing states in stereoscopic vision is favorably alleviated, the use comfort of a user is favorably improved, and the probability of dizziness caused by the inconsistency of the convergence and focusing states in the stereoscopic vision is reduced.
As shown in fig. 3, the waveguide lens includes a side close to the focal point and a side far from the focal point, and the coupling-out unit and the coupling-in unit can be located on the same side of the waveguide lens, or on different sides of the waveguide lens, for example: the coupling-out unit and the coupling-in unit can be both located on one side of the waveguide lens close to the focal point, or both the coupling-out unit and the coupling-in unit are located on one side of the waveguide lens far away from the focal point, or the coupling-out unit is located on one side of the waveguide lens close to the focal point, and the coupling-in unit is located on one side of the waveguide lens close to the focal point, and the coupling-out unit is located on one side of the waveguide lens far away from the focal point.
It should be noted that the specific position of the optical engine may be set according to actual needs, and is not specifically limited herein, the optical engine is a part of a display system, and the main functions of the display system include controlling the output image, modulating the light emitted by each optical engine, and the like, and of course, a feedback system (e.g., a pupil tracking device, and the like) may also be included. The optical machine comprises a light source (including display elements such as a laser light source or a diode light source and the like and necessary light beam adjusting light source elements such as a lens or a prism and the like), generates a fine parallel light beam when having main functions, is modulated by a display system, and can generate a red, green and blue full-color light beam or a monochromatic light beam.
It should be noted that the waveguide lens may be made of glass or resin material, and the material of the waveguide lens is not particularly limited herein.
Fig. 4 is a schematic partial cross-sectional view along the AA' direction in fig. 2 (illustrating that the coupling-out unit and the coupling-in unit are both located on the side of the waveguide lens close to the focal point), as shown in fig. 4, the coupling-in unit and the coupling-out unit may be directly processed on the side of the waveguide lens close to the focal point by etching in micro-nano processing, or may be separately processed and attached to the side of the waveguide lens close to the focal point. Parallel light beams (shown by arrows in fig. 4) emitted from the optical engine are coupled into the waveguide lens by the coupling-in unit, the parallel light beams can be incident perpendicularly to the waveguide lens or at a certain angle, the specific incident angle depends on the design, and in order to ensure that the light can be propagated in the waveguide lens in a total reflection manner, the light needs to enter the waveguide lens through the coupling-in unitAngle theta between the light of the sheet and the waveguide lens1Greater than the critical angle theta of total reflection of the waveguide lens2Namely:
θ1≥θ2＝asin(n1/n2)；
wherein n is1The refractive index of the ambient medium in which the waveguide lens is located, typically air, is 1, n2The refractive index of the waveguide lens is 1-3 according to different waveguide lens materials, when light propagates in the waveguide lens, each time the light meets the coupling-out unit on the side of the waveguide lens close to the focus (i.e. close to a person), the coupling-out unit can couple part of energy out of the waveguide lens, and the coupled-out light faces the pupil of the person. Since the incident angle of each time light is incident on the outcoupling unit is uniform, the outcoupling angles of different outcoupling units are different. Finally, the coupled-out light rays of the plurality of coupling-out units are converged at the center of the pupil of the human eye and are imaged on the retina through the human eye, so that the user observes a virtual image.
In a possible embodiment, as shown in fig. 1, the orthographic projection of the coupling-out unit on the waveguide lens is circular.
Specifically, as shown in fig. 1, the coupling-out unit is a circular whole-surface structure, and the design shown in fig. 1 is favorable for improving the pixel density of the waveguide light field display device, so as to improve the definition of an imaging picture.
In a possible embodiment, as shown in fig. 2, the coupling-out unit includes a plurality of sub-coupling-out units, an orthographic projection of each sub-coupling-out unit on the waveguide lens is a circle, and the orthographic projections of the sub-coupling-out units on the waveguide lens are distributed in concentric circles.
Specifically, when the number of the optical machines is fixed, the number of the sub-coupling-out units is positively correlated with the resolution of the waveguide optical field display device, and therefore, the number and the arrangement mode of the sub-coupling-out units shown in fig. 2 can be adjusted according to the resolution requirement of the waveguide optical field display device and the resolution requirement of human eyes, and therefore, after the arrangement mode shown in fig. 2 is adopted by the sub-coupling-out units, the number and the arrangement mode of the sub-coupling-out units can be adjusted through a process, and the purpose of fine adjustment of the resolution of the waveguide optical field display device is achieved.
It should be noted that, the number of the sub-coupling-out units and the specific arrangement of the sub-coupling-out units may be set according to actual needs, and fig. 2 is only a schematic illustration of the first embodiment of the present application, and does not limit the first embodiment of the present application.
In one possible embodiment, as shown in fig. 2 and 4, the density of concentric circles formed by orthographic projections of a plurality of the sub-outcoupling units on the waveguide lens is uniformly distributed.
Specifically, as shown in fig. 2, the difference between the radii of any two adjacent sub-outcoupling units is equal, that is: as shown in fig. 4, the distance between any two adjacent sub-coupling-out units is equal, after the above design method is adopted, the angular resolution of the field angle can be made uniform on the circumference, and the density of the sub-coupling-out units can be adjusted according to the required resolution, and the adjustment method is relatively simple, and is beneficial to reducing the manufacturing process of the coupling-out units.
It should be noted that the resolution of the waveguide optical field display device is positively correlated with the density of the out-coupling cells such as cells and in-coupling cells, that is: when the densities of the coupling-out units and the coupling-in units are relatively high, the resolution of the waveguide optical field display device is relatively high, and when the densities of the coupling-out units and the coupling-in units are relatively low, the resolution of the waveguide optical field display device is relatively low, and the densities of the coupling-out units and the coupling-in units can be set according to the actually required resolution, which is not specifically limited herein.
In a possible embodiment, fig. 5 is a schematic front view of another waveguide optical field display device provided in the first embodiment of the present application (illustrating that the coupling-out units are concentric circles with non-uniform density distribution), fig. 6 is a schematic diagram of a light ray emission density along the BB' direction in fig. 5, and as shown in fig. 5 and fig. 6, the density of concentric circles formed by orthographic projections of a plurality of sub-coupling-out units on the waveguide lens gradually decreases along a direction away from the center of the circle.
Specifically, since the resolution of the fovea in the center of the human eye is high and the resolution of the peripheral field of view is low, the distribution of the outcoupling units can be designed into the shape shown in fig. 5, that is: by adopting the arrangement mode of gradual resolution, as shown in fig. 5, the density of the concentric circles is gradually reduced along the direction far away from the center of the circle, after the design shown in fig. 5 is adopted, the light ray emission density in the direction BB' in fig. 5 is shown in fig. 6, each light ray in fig. 6 corresponds to one sub-coupling unit, the density of the sub-coupling units in fig. 5 can be reflected according to the light emission density in fig. 6, as shown in fig. 6, among the concentric circles shown in fig. 5, the density of first concentric circles having a radius smaller than a first radius is equal, the density of second concentric circles having a radius larger than the first radius and smaller than a second radius is equal, the density of third concentric circles having a radius larger than the second radius and smaller than a third radius is equal, the density of the first concentric circles is greater than that of the second concentric circles, and the density of the second concentric circles is greater than that of the third concentric circles, so that the pattern with gradually changing density of the concentric circles as shown in fig. 5 is finally formed. After the design mode is adopted, the human eye imaging principle is met, and the comfort level of a user is improved.
In a possible embodiment, as shown in fig. 2 and fig. 5, the pixel points corresponding to the coupling-out unit include an open state and a closed state, the optical machine is in the open state, and the intensity of the parallel light beams emitted by the optical machine is variable.
Specifically, as shown in fig. 2 and fig. 5, in order to realize the display of the light rays corresponding to each field angle one by one, each sub-coupling unit needs to be controlled individually, that is: and independently controlling the pixel points corresponding to the sub-coupling units, for example: each sub-coupling unit can be a holographic polymer dispersed liquid crystal, a liquid crystal grating or other light modulators, and the sub-coupling units realize the control of the opening and closing of pixel points under the control of electric signals, such as: when the control signal is at high level, a grating structure is generated (the pixel point is at the opening state), the light transmitted in the waveguide lens is coupled out of the waveguide lens, and when the control signal is at low level, the sub-coupling-out unit does not act (the pixel point is at the closing state at the moment), and is at a non-functional state, and the light transmitted in the waveguide is not influenced. Then the emergent light intensity of the light machine is controlled to realize brightness modulation at different view fields, namely: the control of the pixel points is achieved by duty cycle modulation of the control signal.
It should be noted that the above embodiments are only examples of a plurality of sub-coupling units distributed in concentric circles, and do not limit the present application.
In a possible embodiment, fig. 7 is another partial schematic cross-sectional view along the direction AA' in fig. 2, as shown in fig. 7, a polarizing filter is disposed on one side of the coupling-out unit close to the focus, a liquid crystal light valve is disposed between the coupling-out unit and the polarizing filter, each pixel point corresponding to the coupling-out unit corresponds to one liquid crystal light valve, the optical engine is in a normally open state, and the intensity of the parallel light beam emitted by the optical engine is unchanged.
Specifically, as shown in fig. 7, the coupling-out unit may be a passive grating structure, a polarizing filter is disposed on a side of the coupling-out unit close to the human eye, a liquid crystal light valve is disposed between the coupling-out unit and the polarizing filter, the intensity of the emergent light of each field angle is controlled by controlling a switch of the liquid crystal light valve, and the polarizing filter controls the opening and closing of the pixel points.
It should be noted that the above embodiments are only described by taking a plurality of sub-outcoupling units distributed in concentric circles as an example, and the present application is not limited thereto, and the distribution of the liquid crystal light valves may be set according to the requirement of resolution for the outcoupling units of the entire structure, that is: the resolution corresponding to the coupling-out unit of the whole surface structure can be controlled by adjusting the density of the liquid crystal light valve.
In a possible embodiment, fig. 8 is another partial schematic cross-sectional view along the direction AA' in fig. 2, as shown in fig. 8, a liquid crystal light valve is disposed on a side of the coupling-out unit close to the focus, a polarizing filter is disposed between the optical engine and the coupling-in unit, the optical engine is in a normally open state, and the intensity of the parallel light beam emitted by the optical engine is unchanged.
Specifically, as shown in fig. 8, the parallel light beams emitted by the optical engine pass through the polarizing filter and then enter the coupling-in unit, and then the coupling-in unit couples the parallel light beams into the waveguide lens, the intensity of the emergent light at each field angle is controlled by controlling the on/off of the liquid crystal light valve, and the absence of light transmission in the waveguide lens is controlled by the polarizing filter.
It should be noted that the above embodiments are only described by taking a plurality of sub-outcoupling units distributed in concentric circles as an example, and the present application is not limited thereto, and the distribution of the liquid crystal light valves may be set according to the requirement of resolution for the outcoupling units of the entire structure, that is: the resolution corresponding to the coupling-out unit of the whole surface structure can be controlled by adjusting the density of the liquid crystal light valve.
In one possible embodiment, as shown in fig. 4, the coupling-out unit is located on one side of the waveguide lens close to the focal point, and the plurality of coupling-in units and the coupling-out units are located on the same side of the waveguide lens.
In particular, as shown in fig. 4, the above design is advantageous for reducing the probability of scratching the coupling-in unit and the coupling-out unit.
Example two
Fig. 9 is a pair of head-mounted augmented reality glasses according to a second embodiment of the present disclosure, and as shown in fig. 9, the head-mounted augmented reality glasses include the waveguide light field display device 6 according to the first embodiment, the waveguide light field display device 6 includes an optical engine 61, the head-mounted augmented reality glasses further include a frame 7 and a temple 8, and a setting position of the optical engine is as shown in fig. 9.
For the structure of the waveguide light field display device in the second embodiment, reference is made to the related description of the first embodiment, and the detailed description is omitted here.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, and are used for illustrating the technical solutions of the present application, but not limiting the same, and the scope of the present application is not limited thereto, and although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope disclosed in the present application; such modifications, changes or substitutions do not depart from the spirit and scope of the present disclosure, which should be construed in light of the above teachings. Are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. A waveguide light field display device, comprising:
the optical-mechanical coupling device comprises a waveguide lens, a plurality of coupling-in units, a coupling-out unit and a plurality of optical machines, wherein the number of the coupling-in units is equal to that of the optical machines;
the waveguide lens is in a curved surface shape, and the focal points of the curved surface are positioned on the same side of the waveguide lens;
the coupling-out unit is positioned at one side of the waveguide lens;
the plurality of the coupling-in units are positioned on one side of the waveguide lens, orthographic projections of the plurality of the coupling-in units on the waveguide lens are uniformly distributed along the circumference, and the orthographic projections of the coupling-out units on the waveguide lens are surrounded by a circle formed by the orthographic projections of the plurality of the coupling-in units on the waveguide lens;
the coupling-out unit comprises a plurality of sub coupling-out units, the orthographic projection of each sub coupling-out unit on the waveguide lens is a circle, and the orthographic projections of the sub coupling-out units on the waveguide lens are distributed in concentric circles;
the density of concentric circles formed by orthographic projection of the sub-coupling-out units on the waveguide lens is gradually reduced along the direction far away from the center of the circle;
one coupling-in unit corresponds to one optical machine, parallel light beams emitted by the optical machine can enter the waveguide lens through the corresponding coupling-in unit, and the refraction angle of the parallel light beams emitted by the optical machine when entering the waveguide lens is larger than the total reflection critical angle of the waveguide lens.
2. The waveguide light field display device according to claim 1, wherein an orthographic projection of the coupling-out unit on the waveguide lens is circular.
3. The waveguide light field display device according to claim 1, wherein the density of concentric circles formed by orthographic projection of a plurality of said sub-outcoupling units on said waveguide lens is uniformly distributed.
4. The waveguide light field display device according to claim 1, wherein the pixel points corresponding to the coupling-out unit include an open state and a closed state, the optical engine is in a normally open state, and the intensity of the parallel light beams emitted by the optical engine is variable.
5. The waveguide light field display device according to claim 1, wherein a polarizing filter is disposed on a side of the coupling-out unit close to the focus, a liquid crystal light valve is disposed between the coupling-out unit and the polarizing filter, each pixel point corresponding to the coupling-out unit corresponds to one liquid crystal light valve, the optical machine is in a normally open state, and an intensity of a parallel light beam emitted by the optical machine is unchanged.
6. The waveguide light field display device according to claim 1, wherein a liquid crystal light valve is disposed on a side of the coupling-out unit close to the focus, a polarizing filter is disposed between the optical engine and the coupling-in unit, the optical engine is in a normally open state, and an intensity of the parallel light beams emitted by the optical engine is unchanged.
7. The waveguide light field display device according to claim 1, wherein the coupling-out unit is located on a side of the waveguide lens near the focal point, and a plurality of the coupling-in units and the coupling-out units are located on a same side of the waveguide lens.
8. Head-mounted augmented reality glasses comprising the waveguide light field display device of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010385116.7A CN111458880B (en) | 2020-05-09 | 2020-05-09 | Waveguide light field display device and head-mounted augmented reality glasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010385116.7A CN111458880B (en) | 2020-05-09 | 2020-05-09 | Waveguide light field display device and head-mounted augmented reality glasses |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111458880A CN111458880A (en) | 2020-07-28 |
| CN111458880B true CN111458880B (en) | 2022-04-22 |
Family
ID=71683883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010385116.7A Active CN111458880B (en) | 2020-05-09 | 2020-05-09 | Waveguide light field display device and head-mounted augmented reality glasses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111458880B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110806645A (en) * | 2019-11-20 | 2020-02-18 | 深圳惠牛科技有限公司 | Grating waveguide for augmented reality |
| CN111965826B (en) * | 2020-08-27 | 2022-11-15 | Oppo广东移动通信有限公司 | Control method and device of intelligent glasses, storage medium and intelligent glasses |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10132872A1 (en) * | 2001-07-06 | 2003-01-16 | Volkswagen Ag | Head-mounted display with image deflector fits adjuster to frame to continuously adjust position or optical element in plane parallel to users line of sight |
| CN103454704A (en) * | 2010-03-17 | 2013-12-18 | 株式会社东芝 | Display method |
| CN104898283A (en) * | 2015-05-25 | 2015-09-09 | 青岛歌尔声学科技有限公司 | Ocular lens system and head-mounted display |
| CN105022168A (en) * | 2015-07-15 | 2015-11-04 | 惠州市华阳多媒体电子有限公司 | HUD image height adjusting device |
| CN105487170A (en) * | 2016-01-19 | 2016-04-13 | 东南大学 | Holographic optical waveguide and holographic optical waveguide display device |
| CN108369339A (en) * | 2015-10-16 | 2018-08-03 | 奥斯坦多科技公司 | Double mode enhancing/virtual reality（AR/VR）Nearly eye wearable display |
| CN110806645A (en) * | 2019-11-20 | 2020-02-18 | 深圳惠牛科技有限公司 | Grating waveguide for augmented reality |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009010537B4 (en) * | 2009-02-25 | 2018-03-01 | Carl Zeiss Smart Optics Gmbh | Beam combiner and use of such in a display device |
| US9128281B2 (en) * | 2010-09-14 | 2015-09-08 | Microsoft Technology Licensing, Llc | Eyepiece with uniformly illuminated reflective display |
| CN105068246B (en) * | 2015-07-15 | 2017-09-22 | 惠州市华阳多媒体电子有限公司 | The quick open method of HUD and the HUD being quickly flipped open |
| EP3420396B1 (en) * | 2016-06-20 | 2022-07-20 | Akonia Holographics, LLC | Waveguide with a reflection-type volume hologram grating |
| EP3301501B1 (en) * | 2016-09-30 | 2022-11-09 | Nokia Technologies Oy | Augmented reality apparatus |
| CN110520763B (en) * | 2017-01-27 | 2021-10-26 | 奇跃公司 | Diffraction gratings formed from supersurfaces with differently oriented nanobeams |
| CN109828368B (en) * | 2017-02-08 | 2021-11-19 | 浙江舜宇光学有限公司 | Eyepiece and display device including the same |
| WO2019238889A1 (en) * | 2018-06-15 | 2019-12-19 | Continental Automotive Gmbh | Apparatus for generating a virtual image having a variable projection distance |
| CN110058464B (en) * | 2019-05-29 | 2022-01-07 | 京东方科技集团股份有限公司 | Liquid crystal photon sieve structure and near-to-eye display device |
| CN110275303A (en) * | 2019-06-13 | 2019-09-24 | 句容福芯电子有限公司 | Near-eye display based on holographic waveguide |
| CN110764265A (en) * | 2019-11-13 | 2020-02-07 | 京东方科技集团股份有限公司 | Near-to-eye light guide assembly and display device |
| CN110989172B (en) * | 2019-12-24 | 2021-08-06 | 平行现实（杭州）科技有限公司 | Waveguide display device with ultra-large field angle |
| CN111103655A (en) * | 2020-01-10 | 2020-05-05 | 深圳珑璟光电技术有限公司 | Hexagonal columnar structure for diffraction optical waveguide |
-
2020
- 2020-05-09 CN CN202010385116.7A patent/CN111458880B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10132872A1 (en) * | 2001-07-06 | 2003-01-16 | Volkswagen Ag | Head-mounted display with image deflector fits adjuster to frame to continuously adjust position or optical element in plane parallel to users line of sight |
| CN103454704A (en) * | 2010-03-17 | 2013-12-18 | 株式会社东芝 | Display method |
| CN104898283A (en) * | 2015-05-25 | 2015-09-09 | 青岛歌尔声学科技有限公司 | Ocular lens system and head-mounted display |
| CN105022168A (en) * | 2015-07-15 | 2015-11-04 | 惠州市华阳多媒体电子有限公司 | HUD image height adjusting device |
| CN108369339A (en) * | 2015-10-16 | 2018-08-03 | 奥斯坦多科技公司 | Double mode enhancing/virtual reality（AR/VR）Nearly eye wearable display |
| CN105487170A (en) * | 2016-01-19 | 2016-04-13 | 东南大学 | Holographic optical waveguide and holographic optical waveguide display device |
| CN110806645A (en) * | 2019-11-20 | 2020-02-18 | 深圳惠牛科技有限公司 | Grating waveguide for augmented reality |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111458880A (en) | 2020-07-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109407313B (en) | Diffraction waveguide display device | |
| US8582206B2 (en) | Laser-scanning virtual image display | |
| TW201835636A (en) | Augmented reality imaging system | |
| JP6823817B2 (en) | Head-up display device | |
| CN109804296B (en) | Image projection apparatus | |
| CN111458880B (en) | Waveguide light field display device and head-mounted augmented reality glasses | |
| CN113655615A (en) | Large exit pupil optical display device, near-to-eye display device and image projection method | |
| CN114355613A (en) | Optical device for diffraction waveguide type augmented reality glasses and application | |
| CN115616752B (en) | Operating microscope and microscope | |
| US20220276489A1 (en) | Optical system and mixed reality device | |
| CN113534478A (en) | Optical assembly, display system and manufacturing method | |
| KR20210042746A (en) | See-through type display device and glasses type augmented reality apparatus including the same | |
| WO2023123920A1 (en) | Optical transmission structure and head-mounted display device | |
| US20190094444A1 (en) | Optical coupling of waveguide and dlp light engine | |
| CN214151260U (en) | Near-to-eye display system and augmented reality equipment | |
| CN214846067U (en) | Grating waveguide element and near-to-eye display equipment | |
| CN114280776A (en) | Optical assembly, near-to-eye display device and manufacturing method | |
| CN113534477A (en) | Optical assembly, display system and manufacturing method | |
| CN113534476B (en) | Optical assembly, display system and manufacturing method | |
| CN220961914U (en) | Optical waveguide and head-up display system | |
| CN116699751B (en) | Optical waveguide and near-to-eye display device | |
| EP4063937A1 (en) | Display apparatus including combiner having asymmetric magnification | |
| WO2021027677A1 (en) | Waveguide-type optical assembly, near-eye display device, image projection method, optical element manufacturing method, and light beam combiner manufacturing method | |
| CN117148594B (en) | Display assembly and AR equipment | |
| CN218481707U (en) | Micro optical machine system and near-to-eye display equipment |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |