CN108957749A - 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
- Publication number
- CN108957749A CN108957749A CN201810738112.5A CN201810738112A CN108957749A CN 108957749 A CN108957749 A CN 108957749A CN 201810738112 A CN201810738112 A CN 201810738112A CN 108957749 A CN108957749 A CN 108957749A
- Authority
- CN
- China
- Prior art keywords
- waveguide
- field
- image
- image generator
- display module
- 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
- 230000000007 visual effect Effects 0.000 title claims abstract description 7
- 210000000162 simple eye Anatomy 0.000 title abstract 4
- 239000005276 holographic polymer dispersed liquid crystals (HPDLCs) Substances 0.000 claims abstract description 32
- 239000013307 optical fiber Substances 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 16
- 230000008878 coupling Effects 0.000 claims description 15
- 238000010168 coupling process Methods 0.000 claims description 15
- 238000005859 coupling reaction Methods 0.000 claims description 15
- 230000005684 electric field Effects 0.000 claims description 14
- 239000000835 fiber Substances 0.000 claims description 11
- 239000010409 thin film Substances 0.000 claims description 10
- 230000001902 propagating effect Effects 0.000 claims description 7
- 239000004973 liquid crystal related substance Substances 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
- 239000011521 glass Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000003190 augmentative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 210000001747 pupil Anatomy 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
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
- G02B27/0101—Head-up displays 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
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0123—Head-up displays characterised by optical features comprising devices increasing the field of view
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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 nearly eye display module of the simple eye big visual field includes: a kind of nearly eye display module of simple eye big visual field, it is characterized in that, it include: the first image generator, second image generator, the first input coupler, the second input coupler, first wave guide, second waveguide reflects decoupling interface array, holographic polymer dispersed liquid crystal layer.
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 holographic liquid crystal display comprises a first image generator, a second image generator, a first input coupler, a second input coupler, a first waveguide, a second waveguide, a reflection coupling-out interface array and a holographic polymer dispersed liquid crystal layer; wherein,
the first image generator for generating a first sub-field-of-view image beam during a first time period; the second image generator is used for generating a second sub-field-of-view image beam in a second time period; 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 waveguide and the second waveguide are arranged in a stack;
the reflective coupling-out interface array is arranged in the first waveguide, and comprises at least two reflective interfaces which are arranged in parallel, and the reflective interfaces are used for coupling light beams propagating in the first waveguide out of the first waveguide to the second waveguide in a reflective mode towards a first field direction;
the holographic polymer dispersed liquid crystal layer is used for diffractively coupling the light beams propagating in the second waveguide out of the second waveguide in a second field direction in a second time period, and an electric field is applied to the holographic polymer dispersed liquid crystal layer in a first time period, so that the light beams coupled into the second waveguide through the reflective coupling-out interface array are transmitted through the holographic polymer dispersed liquid crystal layer and are coupled out of the second waveguide in the first field direction; the diffracted out-coupled light beams and the transmitted out-coupled light beams from the second waveguide are just spliced into the full field-of-view 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, a first sub-field image beam generated by a first image generator in a first time period is coupled into a first waveguide for total reflection propagation, then is coupled out of the first waveguide in a first field direction through a reflection coupling-out interface array and enters a second waveguide, and then is continuously transmitted out of the second waveguide in the first field direction through a holographic polymer dispersed liquid crystal layer applied with an electric field; the second image generator generates a second sub-field image beam in a second time period, the second sub-field image beam is coupled into the second waveguide for total reflection propagation, and the second sub-field image beam is diffracted out of the second waveguide in a second field direction through the holographic polymer dispersed liquid crystal layer without the electric field; the light beams transmitted from the second waveguide and the light beams diffracted from the second waveguide can be spliced into a complete field-of-view image, so that 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. 2 is a schematic diagram of the operation of a holographic polymer dispersed liquid crystal layer;
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 reflective-coupling-out interface array 141, a holographic polymer-dispersed liquid crystal layer 142; wherein,
a first image generator 111 for generating a first sub-field-of-view image beam for a first time period T1; a second image generator 112 for generating a second sub-field-of-view image beam for a second time period T2; 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; the first waveguide 131 and the second waveguide 132 are stacked;
the reflective coupling-out interface array 141 is disposed in the first waveguide 131, and the reflective coupling-out interface array 141 includes at least two reflective interfaces disposed in parallel, and the reflective interfaces are configured to reflectively couple the light beam propagating in the first waveguide 131 out of the first waveguide 131 into the second waveguide 132 toward the first field of view;
a holographic polymer dispersed liquid crystal layer 142 for diffractively coupling the light beam propagating in the second waveguide 132 out of the second waveguide 132 in the second field of view direction as a diffracted light beam S2 for a second period of time T2, the holographic polymer dispersed liquid crystal layer 142 being subjected to an electric field for a first period of time such that the light beam coupled into the second waveguide 132 via the reflective coupling-out interface array 141 is coupled out of the second waveguide 132 in the first field of view direction as a transmitted light beam S1 through the holographic polymer dispersed liquid crystal layer 142; the diffracted coupled-out light beam S2 and the transmitted coupled-out light beam S1 from the second waveguide 132 are just spliced into a full field-of-view image.
In the present application, the volume Holographic grating includes a fixed volume Holographic grating and a switchable volume Holographic grating, and the switchable volume Holographic grating may be prepared by using a Holographic Polymer Dispersed Liquid Crystal (HPDLC). HPDLC is a prepolymer composed of liquid crystal and polymer monomer, and is irradiated by two beams of coherent light to form periodic arrangement in which polymer-rich regions and liquid-rich regions corresponding to bright and dark fringes of interference fringes appear alternately by means of phase separation caused by photopolymerization. As shown in fig. 2, when no electric field is applied, the HPDLC has periodic refractive index modulation to form a Bragg grating, and incident light satisfying the Bragg diffraction condition is emitted in the first-order diffraction direction. When an electric field is applied, the liquid crystal molecules in the rich liquid crystal area are rearranged along the electric field, when the ordinary light refractive index of the liquid crystal molecules is matched with the basic refractive index of the polymer, the refractive index of the grating is uniform, the incident light is directly transmitted out, and the HPDLC becomes a transparent medium.
In the present application, one full field-of-view image is divided into two images of different fields-of-view, and the first image generator 111 generates the first sub-field-of-view image beam for a first period of time T1, and the second image generator 112 generates the second sub-field-of-view image beam for a second period of time T2. Alternatively, the time durations of T1 and T2 may be the same and both are 1/2f, where f is the refresh rate of the full field of view image seen by the human eye. For example, if the refresh rate f of the full field image is 60Hz, T1-T2-1/120 s, and the first image generator 111 and the second image generator 112 both use a refresh rate of at least 120 Hz.
The first sub-field-of-view image beam enters the first waveguide 131 through the first input coupler 121 and then is transmitted by total reflection, and then is reflected out of the first waveguide 131 and enters the second waveguide 132 through the reflection coupling-out interface array 141 in the first field-of-view direction, and since an electric field is applied to the holographic polymer dispersed liquid crystal layer 142 in the second waveguide 132 in a first time period, which is equivalent to a transparent medium, the first sub-field-of-view image beam continues to be transmitted out of the second waveguide 132 in the first field-of-view direction.
The second subfield image beam enters the second waveguide 132 through the second input coupler 122 and then is transmitted by total reflection, and since the holographic polymer dispersed liquid crystal layer 142 is not applied with an electric field in the second period of time, the second subfield image beam is diffracted out of the second waveguide 132 in the second field direction by the holographic polymer dispersed liquid crystal layer 142 in the second period of time.
The first image generator 111 and the second image generator 112 alternately generate image light beams in a first time period and a second time period respectively, and the first sub-field image light beams transmitted out of the second waveguide and the diffracted second sub-field image light beams are just spliced into a complete field image at the human eye, so that the field angle is enlarged.
As an alternative embodiment, the diffraction efficiency of the holographic polymer dispersed liquid crystal layer 142 increases from a first end, where the holographic polymer dispersed liquid crystal layer 142 is closer to the second input coupler 122, to a second end, where the holographic polymer dispersed liquid crystal layer 142 is farther from the second input coupler 122.
In the embodiment, the light intensity of the holographic polymer dispersed liquid crystal layer 142 is strongest at the side close to the second input coupler 122, and gradually weakens at the position far away from the second input coupler 122, so that higher diffraction efficiency is required to ensure the uniformity of the output light intensity in the whole pupil range. The diffraction efficiency of the holographic polymer dispersed liquid crystal layer 142 can be gradually increased from the end close to the second input coupler 122 to the end far away from the second input coupler 122 by designing the grating structure size or the grating constant of the holographic polymer dispersed liquid crystal layer 142.
In the present embodiment, the first image generator or the second 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 a second embodiment of the present application, a monocular large-view-field near-to-eye display module 300, the monocular large-view-field near-to-eye display module 300 is different from the monocular large-view-field near-to-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 the first and second image generators, 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 and the second waveguide in a reflective manner for total reflection propagation.
To reduce the size of the monocular large-field near-eye display module 300, the image generator does not take up much space in the AR glasses. 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 first incoupling reflective element 3212 is specifically configured to couple an image beam emitted by the first image generator parallel to the first waveguide into the first waveguide for total reflection propagation; the second incoupling reflective element 3222 is specifically configured to couple the image beam emitted by the second image generator in parallel to the second waveguide into the second waveguide 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 is different from the monocular large-field-of-view near-eye display module 100 shown in fig. 1 in that the first input coupler 421 includes: 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, 4221 for collimating the image beams generated by the first and second image generators, respectively; the first and second incoupling gratings 4212 and 4222 are used for total reflection propagation by diffracting the collimated image beam into the first and second waveguides, respectively.
To reduce the size of the monocular large-field near-eye display module 300, the image generator does not take up much space in the AR glasses. As shown in fig. 5, 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. Wherein, the big visual field near-to-eye display module assembly 400 of monocular still includes: a first reflective element 4213 and a second reflective element 4223; a first reflecting element 4213 for reflecting the image beam exiting the first image generator parallel to the first waveguide towards the first incoupling grating; a second reflecting element 4223 for reflecting the image beam exiting the second image generator parallel to the second waveguide towards the second incoupling grating.
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 609 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, a first sub-field image beam generated by a first image generator in a first time period is coupled into a first waveguide for total reflection propagation, then is coupled out of the first waveguide in a first field direction through a reflection coupling-out interface array and enters a second waveguide, and then is continuously transmitted out of the second waveguide in the first field direction through a holographic polymer dispersed liquid crystal layer applied with an electric field; the second image generator generates a second sub-field image beam in a second time period, the second sub-field image beam is coupled into the second waveguide for total reflection propagation, and the second sub-field image beam is diffracted out of the second waveguide in a second field direction through the holographic polymer dispersed liquid crystal layer without the electric field; the light beams transmitted from the second waveguide and the light beams diffracted from the second waveguide can be spliced into a complete field-of-view image, so that 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 holographic liquid crystal display comprises a first image generator, a second image generator, a first input coupler, a second input coupler, a first waveguide, a second waveguide, a reflection coupling-out interface array and a holographic polymer dispersed liquid crystal layer; wherein,
the first image generator for generating a first sub-field-of-view image beam during a first time period; the second image generator is used for generating a second sub-field-of-view image beam in a second time period; 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 waveguide and the second waveguide are arranged in a stack;
the reflective coupling-out interface array is arranged in the first waveguide, and comprises at least two reflective interfaces which are arranged in parallel, and the reflective interfaces are used for coupling light beams propagating in the first waveguide out of the first waveguide to the second waveguide in a reflective mode towards a first field direction;
the holographic polymer dispersed liquid crystal layer is used for diffractively coupling the light beams propagating in the second waveguide out of the second waveguide in a second field direction in a second time period, and an electric field is applied to the holographic polymer dispersed liquid crystal layer in a first time period, so that the light beams coupled into the second waveguide through the reflective coupling-out interface array are transmitted through the holographic polymer dispersed liquid crystal layer and are coupled out of the second waveguide in the first field direction; the diffracted out-coupled light beams and the transmitted out-coupled light beams from the second waveguide are just spliced into the full field-of-view 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-eye display module of any one of claims 1 to 4, wherein the refresh rate of the first image generator and the second image generator are the same, and the duration of each of the first time period and the second time period is equal to the inverse of the refresh rate of the first image generator.
6. The monocular large-field near-eye display module of any one of claims 1-4, wherein the first image generator or the second image generator comprises a microdisplay that is a DLP display, an LCOS display, an LCD display, an OLED display, a fiber-optic scanning display, or 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810738112.5A CN108957749A (en) | 2018-07-06 | 2018-07-06 | A kind of nearly eye display module of simple eye big visual field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810738112.5A CN108957749A (en) | 2018-07-06 | 2018-07-06 | A kind of nearly eye display module of simple eye big visual field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108957749A true CN108957749A (en) | 2018-12-07 |
Family
ID=64483306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810738112.5A Pending CN108957749A (en) | 2018-07-06 | 2018-07-06 | A kind of nearly eye display module of simple eye big visual field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108957749A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110515210A (en) * | 2019-09-03 | 2019-11-29 | 北京枭龙科技有限公司 | A kind of nearly eye is shown with grating waveguide device |
| CN110596807A (en) * | 2019-08-20 | 2019-12-20 | 深圳奥比中光科技有限公司 | Waveguide structure, display device, and electronic apparatus |
| CN111175976A (en) * | 2020-01-17 | 2020-05-19 | 歌尔股份有限公司 | Optical waveguide component, display system, augmented reality device and display method |
| CN111338077A (en) * | 2018-12-19 | 2020-06-26 | 成都理想境界科技有限公司 | Optical fiber scanner, optical fiber scanning system and driving method |
| WO2020135754A1 (en) * | 2018-12-29 | 2020-07-02 | 成都理想境界科技有限公司 | Scanning actuator, scanning driver and optical scanner |
| RU2740065C1 (en) * | 2020-04-07 | 2020-12-31 | Федеральное государственное бюджетное образовательное учреждение высшего образования «Московский государственный университет имени М.В.Ломоносова» (МГУ) | Augmented reality device based on holographic optical waveguide |
| CN112444970A (en) * | 2019-08-30 | 2021-03-05 | 成都理想境界科技有限公司 | Large-view-field AR waveguide |
| US20210278686A1 (en) * | 2018-09-28 | 2021-09-09 | Magic Leap, Inc. | Method and system for fiber scanning projector with angled eyepiece |
| CN114051594A (en) * | 2020-04-09 | 2022-02-15 | 辉达公司 | Wide-angle augmented reality display |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120218481A1 (en) * | 2009-10-27 | 2012-08-30 | Milan Momcilo Popovich | Compact holographic edge illuminated eyeglass display |
| CN103782223A (en) * | 2011-09-02 | 2014-05-07 | 奥林巴斯株式会社 | Optical scanning device and endoscope, microscope, projector equipped with the same |
| CN103823267A (en) * | 2012-11-16 | 2014-05-28 | 罗克韦尔柯林斯公司 | Transparent waveguide display |
| CN104040410A (en) * | 2011-08-29 | 2014-09-10 | 伊奎蒂公司 | Controllable waveguide for near-eye display applications |
| CN106950697A (en) * | 2017-04-21 | 2017-07-14 | 北京理工大学 | The multi-region angle of visual field expands and waveguide layering color display method and system |
| CN107024769A (en) * | 2016-01-29 | 2017-08-08 | 北京加你科技有限公司 | A kind of display system based on waveguide |
| CN107092093A (en) * | 2017-06-16 | 2017-08-25 | 北京灵犀微光科技有限公司 | Waveguide display device |
| CN107121824A (en) * | 2017-06-16 | 2017-09-01 | 北京灵犀微光科技有限公司 | Waveguide display device |
| CN206990919U (en) * | 2017-06-29 | 2018-02-09 | 成都理想境界科技有限公司 | A kind of light scanning apparatus |
| CN107966819A (en) * | 2017-12-27 | 2018-04-27 | 北京灵犀微光科技有限公司 | Waveguide display device |
-
2018
- 2018-07-06 CN CN201810738112.5A patent/CN108957749A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120218481A1 (en) * | 2009-10-27 | 2012-08-30 | Milan Momcilo Popovich | Compact holographic edge illuminated eyeglass display |
| CN104040410A (en) * | 2011-08-29 | 2014-09-10 | 伊奎蒂公司 | Controllable waveguide for near-eye display applications |
| CN103782223A (en) * | 2011-09-02 | 2014-05-07 | 奥林巴斯株式会社 | Optical scanning device and endoscope, microscope, projector equipped with the same |
| CN103823267A (en) * | 2012-11-16 | 2014-05-28 | 罗克韦尔柯林斯公司 | Transparent waveguide display |
| CN107024769A (en) * | 2016-01-29 | 2017-08-08 | 北京加你科技有限公司 | A kind of display system based on waveguide |
| CN106950697A (en) * | 2017-04-21 | 2017-07-14 | 北京理工大学 | The multi-region angle of visual field expands and waveguide layering color display method and system |
| CN107092093A (en) * | 2017-06-16 | 2017-08-25 | 北京灵犀微光科技有限公司 | Waveguide display device |
| CN107121824A (en) * | 2017-06-16 | 2017-09-01 | 北京灵犀微光科技有限公司 | Waveguide display device |
| CN206990919U (en) * | 2017-06-29 | 2018-02-09 | 成都理想境界科技有限公司 | A kind of light scanning apparatus |
| CN107966819A (en) * | 2017-12-27 | 2018-04-27 | 北京灵犀微光科技有限公司 | Waveguide display device |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210278686A1 (en) * | 2018-09-28 | 2021-09-09 | Magic Leap, Inc. | Method and system for fiber scanning projector with angled eyepiece |
| US12135435B2 (en) * | 2018-09-28 | 2024-11-05 | Magic Leap, Inc. | Method and system for fiber scanning projector with angled eyepiece |
| CN111338077A (en) * | 2018-12-19 | 2020-06-26 | 成都理想境界科技有限公司 | Optical fiber scanner, optical fiber scanning system and driving method |
| WO2020135754A1 (en) * | 2018-12-29 | 2020-07-02 | 成都理想境界科技有限公司 | Scanning actuator, scanning driver and optical scanner |
| CN110596807A (en) * | 2019-08-20 | 2019-12-20 | 深圳奥比中光科技有限公司 | Waveguide structure, display device, and electronic apparatus |
| CN112444970A (en) * | 2019-08-30 | 2021-03-05 | 成都理想境界科技有限公司 | Large-view-field AR waveguide |
| CN112444970B (en) * | 2019-08-30 | 2022-10-18 | 成都理想境界科技有限公司 | Large-view-field AR waveguide |
| CN110515210A (en) * | 2019-09-03 | 2019-11-29 | 北京枭龙科技有限公司 | A kind of nearly eye is shown with grating waveguide device |
| CN111175976A (en) * | 2020-01-17 | 2020-05-19 | 歌尔股份有限公司 | Optical waveguide component, display system, augmented reality device and display method |
| CN111175976B (en) * | 2020-01-17 | 2022-02-22 | 歌尔股份有限公司 | Optical waveguide component, display system, augmented reality device and display method |
| RU2740065C1 (en) * | 2020-04-07 | 2020-12-31 | Федеральное государственное бюджетное образовательное учреждение высшего образования «Московский государственный университет имени М.В.Ломоносова» (МГУ) | Augmented reality device based on holographic optical waveguide |
| CN114051594A (en) * | 2020-04-09 | 2022-02-15 | 辉达公司 | Wide-angle augmented reality display |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108957749A (en) | A kind of nearly eye display module of simple eye big visual field | |
| CN108919488A (en) | A kind of nearly eye display module of simple eye big visual field | |
| CN113167946B (en) | Projector integrated with scanning mirror | |
| US10551622B2 (en) | Field of view tiling in waveguide-based near-eye displays | |
| US11243450B2 (en) | Saw modulator having optical power component for extended angular redirection of light | |
| US8233204B1 (en) | Optical displays | |
| CN107015368B (en) | A near-eye binocular display device | |
| CN110764260A (en) | Augmented reality device | |
| US20100079865A1 (en) | Near-to-eye scanning display with exit-pupil expansion | |
| JP2010033026A (en) | Light propagation optical element, image display, and head mount display | |
| US20210063765A1 (en) | Waveguide-based augmented reality display apparatus | |
| WO2018140939A1 (en) | Electro-holographic light field generators and displays | |
| US10416468B2 (en) | Light field generator devices with series output couplers | |
| CN212111991U (en) | Waveguide AR display device with large field angle | |
| CN112444970A (en) | Large-view-field AR waveguide | |
| CN211928226U (en) | Optical waveguide lens and three-dimensional display device | |
| CN115145042B (en) | Diffractive waveguide device and near-to-eye display apparatus | |
| CN218350535U (en) | Diffractive optical waveguide | |
| CN109001907A (en) | A kind of high-resolution display module | |
| JP2010204397A (en) | Video display device and head-mounted display | |
| CN115542539A (en) | Wearable device and preparation method thereof | |
| CN118226565A (en) | Waveguide device for improving light efficiency, near-eye display system and near-eye display method | |
| CN116381948B (en) | Optical waveguide and display device | |
| CN112162447A (en) | Wavelength division multiplexing type dual-beam acousto-optic modulation system and method | |
| CN214846067U (en) | Grating waveguide element 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 | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181207 |
|
| WD01 | Invention patent application deemed withdrawn after publication |