CN108919488A - A kind of nearly eye display module of simple eye big visual field - Google Patents
A kind of nearly eye display module of simple eye big visual field Download PDFInfo
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- CN108919488A CN108919488A CN201810739228.0A CN201810739228A CN108919488A CN 108919488 A CN108919488 A CN 108919488A CN 201810739228 A CN201810739228 A CN 201810739228A CN 108919488 A CN108919488 A CN 108919488A
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- 210000000162 simple eye Anatomy 0.000 title abstract 2
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- 238000010168 coupling process Methods 0.000 claims description 18
- 238000005859 coupling reaction Methods 0.000 claims description 18
- 230000008878 coupling Effects 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 16
- 239000000835 fiber Substances 0.000 claims description 11
- 230000001902 propagating effect Effects 0.000 claims description 10
- 239000010409 thin film Substances 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 10
- 239000000919 ceramic Substances 0.000 description 4
- 239000010408 film Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 210000001747 pupil Anatomy 0.000 description 4
- 238000000465 moulding Methods 0.000 description 3
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- 238000010586 diagram Methods 0.000 description 2
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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
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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
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0123—Head-up displays characterised by optical features comprising devices increasing the field of view
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Abstract
This application discloses a kind of nearly eye display modules of simple eye big visual field, for solving the lesser technical problem of field angle in the nearly eye display module of the existing AR based on waveguide.The mould group includes：First image generator and the second image generator are respectively used to generate the image beam of the first sub- visual field and the second sub- visual field；First sub- view field image and the second sub- view field image splicing can form a complete field of view image；First input coupler, the image beam for generating the first image generator collimate and are coupled into first wave guide；Second input coupler, the image beam for generating the second image generator collimate and are coupled into second waveguide；First decoupling grating, light beam for will propagate in first wave guide is to the first visual field direction diffraction decoupling first wave guide, second decoupling grating, light beam for will propagate in second waveguide is to the second visual field direction diffraction decoupling second waveguide, so that the light beam of diffraction decoupling is just spliced into complete field of view image.
Description
Technical Field
The application relates to the technical field of augmented reality display, in particular to a monocular large-view-field near-to-eye display module.
Background
Augmented reality AR display devices enable a user to view the surrounding environment through a transparent or translucent display of the device and also see the image generated by the display overlaid on the surrounding environment. Such devices are typically Head Mounted Display (HMD) glasses or other wearable display devices. Existing waveguide-based AR near-eye display modules generally include an image source, an eyepiece optical element, an input-coupled grating, a waveguide, and an output-coupled grating. Light emitted by an image source is collimated by an eyepiece optical element, and is coupled into a waveguide for total reflection propagation through an input coupling grating at a certain diffraction angle, and the light propagated in the waveguide is coupled out to human eyes through an output coupling grating arranged in the waveguide corresponding to the exit pupil position.
However, the grating is a very incident angle sensitive element, and for the input coupling grating, the light incident on the input coupling grating at different angles has different diffraction efficiency and angle, and has maximum diffraction efficiency at a specific incident angle, and when the incident angle deviates from the specific incident angle, the diffraction efficiency will rapidly decrease, so that the light energy effectively propagating in the coupled waveguide will rapidly decrease, and the current situation that the field angle observed by the user is small is caused.
Disclosure of Invention
The utility model aims at providing a near-to-eye display module assembly of big visual field of monocular solves the less technical problem of field angle among the current near-to-eye display module assembly of AR based on waveguide.
In a first aspect, an embodiment of the present application provides a monocular large-field near-to-eye display module, including: the optical waveguide coupling device comprises a first image generator, a second image generator, a first input coupler, a second input coupler, a first waveguide, a second waveguide, a first coupling-out grating and a second coupling-out grating;
wherein the first image generator is configured to generate a first sub-field-of-view image beam; the second image generator is used for generating a second sub-field-of-view image beam; the first sub-view field image and the second sub-view field image are spliced to form a complete view field image;
the first input coupler is used for collimating and coupling the image light beam generated by the first image generator into the first waveguide; the second input coupler is used for collimating and coupling the image light beam generated by the second image generator into a second waveguide;
the first outcoupling grating is configured to diffract the light beam propagating in the first waveguide out of the first waveguide in the first field direction, and the second outcoupling grating is configured to diffract the light beam propagating in the second waveguide out of the second waveguide in the second field direction, so that the diffracted and coupled light beams are just spliced into the complete field image.
Optionally, the first image generator or the second image generator comprises a microdisplay, which is a DLP display, LCOS display, LCD display, OLED display, fiber scanning display, or MEMS scanning image display system.
Optionally, the optical fiber scanner includes a scan driver and an optical fiber, the optical fiber is fixedly connected to the scan driver, and a front end of the optical fiber extends beyond the scan driver to form an optical fiber cantilever, and the scan driver includes: integrated into one piece and along the first actuating portion that connects gradually from the back to the front direction, isolation part and second actuating portion, the inside of scanning driver is provided with the interior electrode hole that runs through the scanning driver along the fore-and-aft direction, first actuating portion and second actuating portion all include the piezoelectric material body, the piezoelectric material body of first actuating portion has two first lateral surfaces that are parallel to each other and perpendicular to the primary shaft, every first lateral surface all is provided with a first outer electrode, the piezoelectric material body of second actuating portion has two second lateral surfaces that are parallel to each other and perpendicular to the secondary shaft, every second lateral surface all is provided with a second outer electrode, primary shaft and secondary shaft all are perpendicular to fore-and-aft direction and mutually perpendicular, the inner wall in interior electrode hole be provided with first outer electrode and second outer electrode matched with inner electrode.
Optionally, the natural frequency of the body of piezoelectric material of the second actuation portion is greater than the natural frequency of the piezoelectric material of the first actuation portion.
Optionally, the inner electrode hole is a circular hole or a square hole, when the inner electrode hole is the square hole, the hole wall of the square hole includes two first planes parallel to the first outer side surface and two second planes parallel to the second outer side surface, and the inner electrode is disposed on the first planes and the second planes.
Optionally, the first external electrode is connected with a first film conductive layer, and the first film conductive layer is applied to the surface of the first actuating part in an insulating manner; the second external electrode is connected with a second thin film conducting layer, and the second thin film conducting layer is attached to the outer surfaces of the first actuating part and the isolating part in an insulating mode.
One or more technical solutions in the embodiments of the present application have at least the following technical effects or advantages:
in the embodiment of the application, each image generator is used for displaying a certain field image, and the light beams of each field image are transmitted through respective waveguides and then spliced and output through the coupled optical gratings, so that a complete field image formed by splicing single field images can be presented to human eyes, and the field angle is enlarged.
Drawings
Fig. 1 is a schematic structural view of a monocular large-field near-eye display module according to a first embodiment of the present application;
fig. 2A is a schematic structural view of another monocular large-field near-eye display module disclosed in the first embodiment of the present application;
fig. 2B is a schematic front view of the monocular large-field near-eye display module shown in fig. 2A of the present application;
fig. 3 is a schematic structural view of a monocular large-field near-eye display module according to a second embodiment of the present application;
fig. 4 is a schematic structural view of a monocular large-field near-eye display module according to a third embodiment of the present application;
fig. 5 is a schematic structural view of another monocular large-field near-eye display module disclosed in the third embodiment of the present application;
FIG. 6 is a schematic diagram of a scan driver according to the present invention;
fig. 7 is a sectional view showing a structure of a scan driver according to the present invention.
Detailed Description
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 of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 1, fig. 1 is a schematic structural view of a monocular large-field near-eye display module disclosed in a first embodiment of the present application. The monocular large-field near-to-eye display module 100 includes: a first image generator 111, a second image generator 112, a first input coupler 121, a second input coupler 122, a first waveguide 131, a second waveguide 132, a first outcoupling grating 141, a second outcoupling grating 142; wherein,
a first image generator 111 for generating a first sub-field-of-view image beam; a second image generator 112 for generating a second sub-field-of-view image beam; the first sub-field image and the second sub-field image are spliced to form a complete field image;
a first input coupler 121 for collimating and coupling the image beam generated by the first image generator 111 into the first waveguide 131; a second input coupler 122 for collimating and coupling the image beam generated by the second image generator 112 into a second waveguide 132;
a first outcoupling grating 141 for diffracting the light beams propagating in the first waveguide 131 out of the first waveguide 131 towards the first field of view direction S1, and a second outcoupling grating 142 for diffracting the light beams propagating in the second waveguide 132 out of the second waveguide 132 towards the second field of view direction S2, so that the diffracted and outcoupled light beams are just spliced into the complete field of view image.
In the present embodiment, the first image generator or the first image generator may include: and the micro display is a DLP display, an LCOS display, an LCD display, an OLED display, an optical fiber scanning display or an MEMS scanning image display system.
In this embodiment, the first input coupler 121 and the second input coupler 122 may be an input coupling mirror or an input coupling grating, which couples the image beam generated by the image generator into the first waveguide or the second waveguide at a specific angle for total reflection propagation by reflection or diffraction, respectively.
In this embodiment, the first coupling-out grating 141 or the second coupling-out grating 142 diffracts the light beams propagating in the waveguide to the human eyes in the corresponding field directions respectively in a diffraction manner, and here, the grating constant and the coupling-out angle of the coupling-out grating need to be set, so that the coupled-out light beams can be just spliced into the complete field image, and thus, the human eyes can see an image with a relatively large viewing angle.
As an alternative implementation, as shown in fig. 2A and 2B, fig. 2A is a schematic structural diagram of another monocular large-field near-to-eye display module disclosed in the first embodiment of the present application; fig. 2B is a schematic front view of the monocular large-field near-eye display module shown in fig. 2A. The monocular large-view-field near-to-eye display module 100 further includes: a first relay grating 151 and a second relay grating 152; a first relay grating 151 for expanding the exit pupil of the light beam propagating in the first waveguide 131 and guiding the expanded light beam to the first outcoupling grating 141; the second relay grating 152 expands the exit pupil of the light beam propagating in the second waveguide 132, and guides the expanded light beam to the second outcoupling grating 142.
In this embodiment, the light beam coupled into the first waveguide 131 through the first input coupler 121 is totally reflected in the first waveguide 131 and propagates to the first relay grating 151, so as to expand the beam in the X direction, and the expanded light beam continues to be totally reflected and propagates to the first coupling grating 141 in the first waveguide 131, and the first coupling grating 141 couples the light beam out of the first waveguide on one hand and expands the beam in the Z direction on the other hand.
In this embodiment, the light beam coupled into the second waveguide 132 through the second input coupler 122 is totally reflected in the second waveguide 132 and propagates to the second relay grating 152, so that beam expansion in the X direction is realized, the expanded light beam continues to be totally reflected and propagates to the second coupling-out grating 142 in the second waveguide 132, and the second coupling-out grating 142 couples the light beam out of the second waveguide on one hand and expands the light beam in the Z direction on the other hand.
As an alternative embodiment, the diffraction efficiency of the first outcoupling grating 141 gradually increases from the end near the first input-coupler 121 to the end far from the first input-coupler 121; the diffraction efficiency of the second outcoupling grating 142 gradually increases from the end near the second input coupler 122 to the end away from the second input coupler 122.
In this embodiment, the intensity of light on the side of the out-coupling grating 141/142 near the input coupler 121/122 is the strongest, and the intensity of light at a position far from the input coupler 121/122 is gradually reduced, so that higher diffraction efficiency is required to ensure uniformity of output intensity across the pupil. The present application can gradually increase the diffraction efficiency of the outcoupled grating 141/142 from the end near the input coupler 121/122 to the end far from the input coupler 121/122 by designing the structural size of the grating or the grating constant.
As shown in fig. 3, fig. 3 is a schematic structural view of a monocular large-field near-eye display module disclosed in the second embodiment of the present application. The monocular large-field-of-view near-eye display module 300 is different from the monocular large-field-of-view near-eye display module 100 shown in fig. 1 in that the first input coupler 321 includes: a first eyepiece optics 3211 and a first incoupling reflective element 3212; a second input coupler 322 comprising: a second eyepiece optics 3221 and a second incoupling reflective element 3222; first and second eyepiece optics 3211 and 3221 for collimating the image beams generated by first and second image generators 311 and 312, respectively; the first incoupling reflective element 3212 and the second incoupling reflective element 3222 are respectively configured to couple the collimated image light beam into the first waveguide 331 and the second waveguide 332 by reflection for total reflection propagation.
In order to reduce the size of the monocular large-field-of-view near-eye display module 300 and make the display module closer to the AR product itself, the first incoupling reflective element 3212 is specifically configured to couple the image beam emitted by the first image generator 311 in parallel with the first waveguide 331 into the first waveguide 331 for total reflection propagation; the second incoupling reflective element 3222 is specifically configured to couple the image beam emitted from the second image generator 312 parallel to the second waveguide 332 into the second waveguide 332 for total reflection propagation.
As shown in fig. 4, fig. 4 is a schematic structural view of a monocular large-field near-eye display module disclosed in a third embodiment of the present application. The monocular large-field-of-view near-eye display module 400 differs from the monocular large-field-of-view near-eye display module 100 shown in figure 1 in that,
a first input coupler 421 comprising: a first eyepiece optics 4211 and a first incoupling grating 4212;
a second input coupler 422, comprising: a second eyepiece optics 4221 and a second incoupling grating 4222;
first and second eyepiece optics 4211 and 4221 for collimating the image beams generated by the first and second image generators 411 and 412, respectively;
the first and second incoupling gratings 4212, 4222 are used for diffractively coupling the collimated image beam into the first and second waveguides 431, 432, respectively.
As shown in fig. 5, in order to reduce the size of the monocular large-view-field near-to-eye display module 400, the display module is made to be closer to the AR product itself, and the monocular large-view-field near-to-eye display module 400 further includes: a first reflective element 4213 and a second reflective element 4223;
a first reflecting element 4213 for reflecting the image beam emitted from the first image generator 411 in parallel with the first waveguide 431 toward the first incoupling grating 4212;
a second reflecting element 4223 for reflecting the image beam exiting the second image generator 412 parallel to the second waveguide 432 towards a second incoupling grating 4222.
When the monocular large-view-field near-eye display module is applied to a near-eye display device such as a VR/AR, the consistency and the integrity of the whole structure are particularly important, which can bring many benefits to the near-eye display device, such as: the structure is cleaner and tidier, the space utilization rate is improved, the reliability is improved, the assembling difficulty is reduced, and the like. Therefore, the scan driver of the present invention is preferably an integrally formed scan driver.
The fiber scanner structure adopted by the present invention is described in detail below with reference to fig. 6 and 7, the fiber scanner includes a scan driver and an optical fiber 604, the optical fiber 604 is fixedly connected with the scan driver, and the front end of the optical fiber exceeds the scan driver to form a fiber cantilever, the scan driver includes: a first actuating part 601, a separating part 607 and a second actuating part 606 which are integrally formed and sequentially connected along the back-to-front direction, an inner electrode hole 609 penetrating the scanning driver along the front-to-back direction is arranged in the scanning driver, the optical fiber 604 is fixed in an inner electrode hole 609, the first actuating portion 601 and the second actuating portion 606 both comprise piezoelectric material bodies, the piezoelectric material body of the first actuating portion 601 is provided with two first outer side faces which are parallel to each other and perpendicular to a first shaft, each first outer side face is provided with a first outer electrode 608, the piezoelectric material body of the second actuating portion 606 is provided with two second outer side faces which are parallel to each other and perpendicular to a second shaft, each second outer side face is provided with a second outer electrode 603, the first shaft and the second shaft are perpendicular to the front-back direction and perpendicular to each other, and the inner wall of the inner electrode hole 609 is provided with an inner electrode 605 matched with the first outer electrode 608 and the second outer electrode 603.
First actuating portion 601 drive optic fibre cantilever along the vibration of primary shaft direction, second actuating portion 606 drive optic fibre cantilever along the vibration of secondary shaft direction, integrated into one piece's two-way driver can reduce part quantity, makes the scanning process more stable, and the connecting portion between first actuating portion 601 and the second actuating portion 606 can not appear the not hard up that long-time operation leads to, has the volume production of being convenient for, makes fast, the error is little, repeatability is high, advantages such as yields.
Compare in adopting fixed modes such as gluing or buckle, screw among the prior art between first actuating portion 601 and the second actuating portion 606, the mode of gluing or buckle can lead to connecting not hard up because of long-time high-frequency vibration, directly influences the vibration performance of scanner, and the fixed mode of screw is then the volume slightly bigger, and the structure shows slightly complicacy to current fixed mode technology degree of difficulty is big, the preparation is consuming time, the repeatability is poor, the yields is low.
The second actuating part 606 and the first actuating part 601 in the fiber scanner are small in size and have a thickness of about several millimeters, so that the two parts are easily damaged when a connecting piece is adopted in the process of connecting the two parts with each other; and utilize mould integrated into one piece, avoided a series of processes such as follow-up scanner equipment, alignment, debugging, reduce the complexity, promote preparation efficiency, consequently adopt integrated into one piece can greatly reduced the degree of difficulty in the manufacturing process and promote the device reliability, can prevent dismantling, prevent the disintegration simultaneously, increase whole reliability and durability.
The first actuating part 601 and the second actuating part 606 control the optical fiber 604 to generate vibration in the synthetic direction of the vibration in the first axis direction and the vibration in the second axis direction according to the driving signal sent by the control component, the natural frequency of the second actuating part 606 is far greater than that of the first actuating part 601, so that the optical fiber cantilever is further driven to swing, and the emergent end of the tail end of the cantilever section performs grid scanning in a three-dimensional space to emit laser with modulation information so as to display an image.
In order to make the fiber scanner in the present invention drive the fiber cantilever to realize grid-type scanning, the natural frequencies of the first actuating part 601 and the second actuating part 606 must be different, i.e. both can be regarded as a kind of filter, and only the driving signal with the frequency corresponding to the natural frequencies of both can drive both to stably vibrate.
The integral molding of the first actuating portion 601, the isolating portion 607 and the second actuating portion 606 means that the integral member including the first actuating portion 601, the isolating portion 607 and the second actuating portion 606 is integrally manufactured and molded by adopting an integral molding process. For example, each of the first actuator 601, the spacer 607, and the second actuator 606 includes a main body made of a piezoelectric ceramic powder material, an integral member including the first actuator 601, the spacer 607, and the second actuator 606 is obtained by loading piezoelectric ceramic powder into a mold, press-molding the piezoelectric ceramic powder, and baking the piezoelectric ceramic powder, and then polarizing the first actuator 601 and the second actuator 606 as needed, and adding driving electrodes to the first actuator 601 and the second actuator 606.
In the application field of the micro structure of the optical fiber scanner, the first actuating portion 601 and the second actuating portion 606 after being integrally formed are significant in improvement of the quality of the scanned emergent image, and are mainly reflected by the following factors: in the optical fiber scanner, the first actuating part 601 and the second actuating part 606 vibrate at high frequency, in the process of integrally forming the first actuating part 601 and the second actuating part 606, the scanner is compact enough to realize high-efficiency performance due to pressure of tens of megapascals, and meanwhile, the rigidity is extremely high and cannot be compared with that of the scanner by using an adhesive mode, so that the problem that the interconnection part is loosened due to high-frequency vibration is avoided by integrally forming.
By arranging the first outer side face and the second outer side face, the arrangement positions of the first outer electrode 608 and the second outer electrode 603 are accurate, and during processing, as long as the included angle between the first outer side face and the second outer side face is ensured, when the electrodes are arranged, the included angle between the vibration direction of the first actuating portion 601 and the vibration direction of the second actuating portion 606 can be ensured only by arranging the outer electrodes on the first outer side face and the second outer side face.
The first actuator 601 has its front end portion vibrated along the first axis by the alternating electric field formed between the first outer electrode 608 and the first inner electrode, and the second actuator 606 has its front end portion vibrated along the second axis by the alternating electric field formed between the second outer electrode 603 and the second inner electrode. Specifically, a portion of the piezoelectric material body of the first actuation portion 601 between the first outer electrode 608 and the first inner electrode is polarized in a direction perpendicular to the first outer side face, and a portion of the piezoelectric material body of the second actuation portion 606 between the second outer electrode 603 and the second inner electrode is polarized in a direction perpendicular to the second outer side face.
The inner electrode hole 609 is a circular hole or a square hole, when the inner electrode hole 609 is a square hole, the hole wall of the square hole comprises two first planes parallel to the first outer side surface and two second planes parallel to the second outer side surface, and the inner electrode 605 is arranged on the first planes and the second planes. It can also be: when the inner electrode hole 609 is circular, the inner electrode 605 is a tubular whole, and the first actuating portion 601 and the second actuating portion 606 share one inner electrode 605.
The first external electrode 608 is connected to a first thin film conductive layer 611, and the first thin film conductive layer 611 is attached to the surface of the first actuator 601 in an insulating manner. The second external electrode 603 is connected with a second thin film conductive layer 602, and the second thin film conductive layer 602 is adhered to the outer surfaces of the first actuating part 601 and the isolating part 607 in an insulating way; therefore, each external electrode is connected with an external driving device or detection device through the corresponding film conductive layer. In the vibration process of the optical fiber scanner, the film is bent and deformed along with the optical fiber scanner, and compared with wire connection, the influence on the displacement of the optical fiber scanner caused by the dead weight of the wire can be well overcome.
One or more technical solutions in the embodiments of the present application have at least the following technical effects or advantages:
in the embodiment of the application, each image generator is used for displaying a certain field image, and the light beams of each field image are transmitted through respective waveguides and then spliced and output through the coupled optical gratings, so that a complete field image formed by splicing single field images can be presented to human eyes, and the field angle is enlarged.
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
The present application is not limited to the foregoing embodiments. The application extends to any novel feature or any novel combination of features disclosed in this specification and to any novel method or process steps or any novel combination of features disclosed.
Claims (10)
1. The utility model provides a near-to-eye display module assembly of big visual field of monocular which characterized in that includes: the optical waveguide coupling device comprises a first image generator, a second image generator, a first input coupler, a second input coupler, a first waveguide, a second waveguide, a first coupling-out grating and a second coupling-out grating; wherein,
the first image generator is used for generating a first sub-field-of-view image beam; the second image generator is used for generating a second sub-field-of-view image beam; the first sub-field-of-view image and the second sub-field-of-view image are spliced to form a complete field-of-view image;
the first input coupler is used for collimating and coupling the image light beam generated by the first image generator into the first waveguide; the second input coupler is used for collimating and coupling the image light beam generated by the second image generator into a second waveguide;
the first outcoupling grating is configured to diffract the light beam propagating in the first waveguide out of the first waveguide in the first field direction, and the second outcoupling grating is configured to diffract the light beam propagating in the second waveguide out of the second waveguide in the second field direction, so that the diffracted and coupled light beams are just spliced into the complete field image.
2. The monocular large-field near-eye display module of claim 1,
the first input coupler comprising: a first eyepiece optics and a first incoupling reflective element;
the second input coupler comprising: a second eyepiece optics and a second incoupling reflective element;
the first eyepiece optics and the second eyepiece optics are used for collimating the image beams generated by the first image generator and the second image generator respectively;
the first incoupling reflective element and the second incoupling reflective element are respectively used for incoupling the collimated image light beams into the first waveguide and the second waveguide in a reflection mode for total reflection propagation.
3. The monocular large-field near-eye display module of claim 2,
the first incoupling reflecting element is specifically used for incoupling the image light beam emitted by the first image generator in parallel to the first waveguide into the first waveguide for total reflection propagation;
the second incoupling reflecting element is specifically configured to incouple the image beam emitted by the second image generator in parallel to the second waveguide into the second waveguide for total reflection propagation.
4. The monocular large-field near-eye display module of claim 1,
the first input coupler comprising: a first eyepiece optics and a first incoupling grating;
the second input coupler comprising: a second eyepiece optics and a second incoupling grating;
the first eyepiece optics and the second eyepiece optics are used for collimating the image beams generated by the first image generator and the second image generator respectively;
the first incoupling grating and the second incoupling grating are respectively used for incoupling the collimated image light beams into the first waveguide and the second waveguide in a diffraction mode to carry out total reflection propagation.
5. The monocular large-field near-to-eye display module of claim 4, further comprising: a first reflective element and a second reflective element;
the first reflecting element is used for reflecting the image light beams emitted by the first image generator in parallel to the first waveguide to the first incoupling grating;
the second reflecting element is used for reflecting the image light beams emitted by the second image generator in parallel with the second waveguide to the second incoupling grating.
6. The monocular large-field near-eye display module of any one of claims 1-5, wherein the first image generator or the second image generator comprises a microdisplay, the microdisplay being one of a DLP display, an LCOS display, an LCD display, an OLED display, a fiber-optic scanning display, a MEMS scanning image display system.
7. The monocular large-field near-eye display module of claim 6, wherein the fiber scanner comprises a scan driver and an optical fiber, the optical fiber is fixedly connected to the scan driver, and a front end of the optical fiber extends beyond the scan driver to form a fiber cantilever, the scan driver comprises: integrated into one piece and along the first actuating portion that connects gradually from the back to the front direction, isolation part and second actuating portion, the inside of scanning driver is provided with the interior electrode hole that runs through the scanning driver along the fore-and-aft direction, first actuating portion and second actuating portion all include the piezoelectric material body, the piezoelectric material body of first actuating portion has two first lateral surfaces that are parallel to each other and perpendicular to the primary shaft, every first lateral surface all is provided with a first outer electrode, the piezoelectric material body of second actuating portion has two second lateral surfaces that are parallel to each other and perpendicular to the secondary shaft, every second lateral surface all is provided with a second outer electrode, primary shaft and secondary shaft all are perpendicular to fore-and-aft direction and mutually perpendicular, the inner wall in interior electrode hole be provided with first outer electrode and second outer electrode matched with inner electrode.
8. The monocular large-field near-eye display module of claim 7, wherein the natural frequency of the body of piezoelectric material of the second actuator is greater than the natural frequency of the piezoelectric material of the first actuator.
9. The monocular large-field-of-view near-eye display module of claim 7 or 8, wherein the inner electrode hole is a circular hole or a square hole, when the inner electrode hole is a square hole, two first planes parallel to the first outer side surface and two second planes parallel to the second outer side surface are included in a hole wall of the square hole, and the inner electrode is disposed on the first plane and the second plane.
10. The monocular large-field near-eye display module of claim 9, wherein the first external electrode is connected to a first thin film conductive layer, and the first thin film conductive layer is applied to a surface of the first actuator in an insulating manner; the second external electrode is connected with a second thin film conducting layer, and the second thin film conducting layer is attached to the outer surfaces of the first actuating part and the isolating part in an insulating mode.
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