CN107121824A - Waveguide display device - Google Patents
Waveguide display device Download PDFInfo
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- CN107121824A CN107121824A CN201710458524.9A CN201710458524A CN107121824A CN 107121824 A CN107121824 A CN 107121824A CN 201710458524 A CN201710458524 A CN 201710458524A CN 107121824 A CN107121824 A CN 107121824A
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- waveguide
- light
- hpdlc
- display device
- layers
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
- G02F1/13342—Holographic polymer dispersed liquid crystals
-
- 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
- G02B27/0103—Head-up displays characterised by optical features comprising holographic elements
Abstract
The invention discloses a kind of waveguide display device, it is related to optical technical field.Including image source, relay optical system, input coupler, waveguide, output coupler, controller, wherein, image source is used for display image, and relay optical system is used for the image directive input coupler for showing image source, and input coupler is used to the outgoing of relay optical system being optically coupled into waveguide, output coupler is used to the optocoupler propagated in waveguide, wherein, output coupler includes waveguide decoupling grating, and waveguide decoupling grating includes multiple monochromatic gratings corresponding with the light of different wave length.In the present invention, in the case of with larger field angle and use small-sized image source, it is possible to achieve full-color EL display.
Description
Technical field
The present invention relates to optical technical field, more particularly to waveguide display device.
Background technology
With the development of science and technology, augmented reality display device is increasingly valued by people.In the prior art, it is general
All over using monochromatic waveguide Display Technique.
However, colored waveguide Display Technique can provide more complete information displaying, and user can greatly be lifted
Experience, this is that prior art can not be provided.
The content of the invention
The embodiments of the invention provide a kind of waveguide display device.Aiming to solve the problem that in augmented reality display device to be carried out
The problem of colour display.There is a basic understanding for some aspects of the embodiment to disclosure, shown below is simple
Summarize.The summarized section is not extensive overview, nor to determine key/critical component or describe the guarantor of these embodiments
Protect scope.Its sole purpose is that some concepts are presented with simple form, in this, as the preamble of following detailed description.
According to embodiments of the present invention there is provided a kind of waveguide display device, including image source, relay optical system, input
Coupler, waveguide, output coupler, controller, wherein,
Image source, for display image；
Relay optical system, for the image directive input coupler for showing image source；
Input coupler, for the outgoing of relay optical system to be optically coupled into waveguide；
Output coupler, for the optocoupler propagated in waveguide to be gone out, wherein, output coupler includes waveguide decoupling grating,
Waveguide decoupling grating includes multiple monochromatic gratings corresponding with the light of different wave length.
Optionally, waveguide decoupling grating is HPDLC layers of holographic polymer dispersed liquid crystal, and HPDLC layers include and different wave length
The corresponding multiple sublayers of light.
Optionally, output coupler include being stacked the first HPDLC layer and the 2nd HPDLC layers, the first HPDLC layers with
2nd HPDLC layers diffraction light it is in opposite direction；
Waveguide display device also includes controller, for controlling to the first HPDLC layers and the 2nd HPDLC layers of application electric field.
Optionally, the first HPDLC layers and the 2nd HPDLC layers respectively include 3 sons corresponding with feux rouges, green glow and blue light
Layer.
Optionally, controller is additionally operable to,
In first time period, to the first HPDLC layers of application electric field；
In second time period, to the 2nd HPDLC layers of application electric field.
Optionally, input coupler is coupled into grating including waveguide, and waveguide is coupled into grating including corresponding with the light of different wave length
Multiple monochromatic gratings；
Wherein, multiple monochromatic grating phases that multiple monochromatic gratings that waveguide is coupled into grating and included include with waveguide decoupling grating
Correspondence.
Optionally, it is HPDLC layers that waveguide, which is coupled into grating, and HPDLC layers include multiple sublayers corresponding with the light of different wave length.
Optionally, HPDLC layers include 3 sublayers corresponding with feux rouges, green glow and blue light.
Optionally, waveguide includes multiple ducting layers, multiple monochromes that multiple ducting layers include with waveguide decoupling grating respectively
Grating is corresponding.
Optionally, multiple monochromatic gratings that waveguide decoupling grating includes are located in multiple ducting layers respectively.
Waveguide display device disclosed in the embodiment of the present invention, in the feelings with larger field angle and use small-sized image source
Under condition, it is possible to achieve full-color EL display, simultaneously as the incident ray angle of visual field of relay optical system reduces, so as to reduce
The difficulty and complexity of relay optical system design.
It should be appreciated that the general description of the above and detailed description hereinafter are only exemplary and explanatory, not
Can the limitation present invention.
Brief description of the drawings
Accompanying drawing herein is merged in specification and constitutes the part of this specification, shows the implementation for meeting the present invention
Example, and for explaining principle of the invention together with specification.
Fig. 1 is schematic diagram a kind of HPDLC layers disclosed in the embodiment of the present invention；
Fig. 2 is a kind of schematic diagram of waveguide display device disclosed in the embodiment of the present invention；
Fig. 3 is the schematic diagram of another waveguide display device disclosed in the embodiment of the present invention；
Fig. 4 is the schematic diagram of another waveguide display device disclosed in the embodiment of the present invention；
Fig. 5 is the close-up schematic view of another waveguide display device disclosed in the embodiment of the present invention；
Fig. 6 is the schematic diagram of another waveguide display device disclosed in the embodiment of the present invention；
Fig. 7 is a kind of schematic diagram of controller disclosed in the embodiment of the present invention；
Fig. 8 is a kind of schematic diagram of input coupler disclosed in the embodiment of the present invention；
Fig. 9 is the schematic diagram of another waveguide display device disclosed in the embodiment of the present invention.
Embodiment
The following description and drawings fully show specific embodiments of the present invention, to enable those skilled in the art to
Put into practice them.Embodiment only represents possible change.Unless explicitly requested, otherwise single components and functionality is optional, and
And the order of operation can change.The part of some embodiments and feature can be included in or replace other embodiments
Part and feature.The scope of embodiment of the present invention includes the gamut of claims, and claims institute
There is obtainable equivalent.Herein, each embodiment can individually or generally be represented that this is only with term " invention "
It is merely for convenience, and if in fact disclosing the invention more than one, it is not meant to automatically limit the scope of the application
For any single invention or inventive concept.Herein, such as first and second or the like relational terms are used only for one
Entity or operation make a distinction with another entity or operation, exist without requiring or implying between these entities or operation
Any actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant be intended to it is non-exclusive
Property include so that process, method or equipment including a series of key elements not only include those key elements, but also including
Other key elements being not expressly set out.Each embodiment herein is described by the way of progressive, and each embodiment is stressed
Be all between difference with other embodiment, each embodiment identical similar portion mutually referring to.For implementing
For example disclosed structure, product etc., because it is corresponding with part disclosed in embodiment, so fairly simple, the phase of description
Part is closed referring to method part illustration.
Volume holographic grating includes fixed volume holographic grating and switchable type volume holographic grating, switchable type volume holographic grating
Holographic polymer dispersed liquid crystal (English full name can be used：Holographic polymer dispersed liquid
Crystal, english abbreviation：HPDLC) prepare.The prepolymer that HPDLC is made up of liquid crystal, polymer monomer, it is relevant in two beams
Under light irradiation, the phase separation triggered using photo polymerization, formed the rich polymers area corresponding with the bright dark fringe of interference fringe and
The periodic arrangement that rich solution crystalline region is alternately present.As shown in figure 1, there is periodic refractive index tune when being not added with electric field, in HPDLC
System, forms Bragg grating, meets the incident light of Bragg diffraction conditions and is projected with first-order diffraction direction.When applying electric field, rich solution
Crystalline region liquid crystal molecule will be rearranged along electric field, when its ordinary refraction index matches with the basic refractive index of polymer, grating
Refractive index will become uniformity, incident light will be transmitted away directly, and HPDLC turns into one piece of transparent medium.
The embodiment of the invention discloses a kind of waveguide display device 10, including image source 101, relay optical system 102 is defeated
Enter coupler 103, waveguide 104, output coupler 105, wherein, input coupler 103 can be coupled into grating including waveguide.Fig. 2
Two kinds of optional structures of waveguide display device 10 are respectively illustrated with Fig. 3, Fig. 2 is that waveguide is coupled into knot of the grating inside waveguide
Structure, Fig. 3 is that waveguide is coupled into the structure that grating is located at waveguide external.Specifically,
Image source 101, for display image；
Relay optical system 102, for the image directive input coupler 103 for showing image source 101；
Input coupler 103, for the outgoing of relay optical system 102 to be optically coupled into waveguide 104；
Output coupler 105, for the optocoupler propagated in waveguide 104 to be gone out；Wherein, output coupler 105 includes waveguide
Decoupling grating, waveguide decoupling grating includes multiple monochromatic gratings corresponding with the light of different wave length.
Optionally, image source 101 can be flat-faced screen or camber display screen, and further alternative, image source 101 can
Think LCDs (English full name：Liquid Crystal Display, english abbreviation：LCD), (English is complete for liquid crystal on silicon
Claim：Liquid Crystal on Silicon, english abbreviation：LCOS) (English is complete for reflection type projection display screen, light emitting diode
Claim：Light Emitting Diode, English abbreviation：LED) display screen etc..
The image that image source 101 is shown is imaged to infinite point via relay optical system 102.Optionally, relay optical
System 102 can be a lens group, eyeglass can use aspherical lens or free surface lens, for correct each aberration and
Aberration, it would however also be possible to employ diffraction optical element carrys out further optimal imaging quality.
Optionally, waveguide decoupling grating can be HPDLC layers, and HPDLC layers including corresponding with the light of different wave length multiple
Sublayer, wherein, HPDLC layers include multiple sublayers corresponding with the light of different wave length, can be used for the effect for realizing monochromatic grating.
Further alternative, waveguide display device 10 can also include controller 106, for controlling to apply to HPDLC layers
Electric field.
As shown in figure 4, the HPDLC layers that output coupler 105 includes, include many height corresponding with the light of different wave length
Layer, exemplary, the HPDLC layers that output coupler 105 includes can include and feux rouges (R light), green glow (G light) and blue light (B
Light) corresponding 3 sublayers, respectively R gratings, G gratings and B gratings.Fig. 5 is the HPDLC layers that output coupler 105 includes
Close-up schematic view, specifically, the part that the part of amplification is irised out for dotted line in Fig. 4.
Optionally, output coupler 105 can include the first HPDLC layers 201 and the 2nd HPDLC layers 202 being stacked,
As shown in Figure 6.Further alternative, the diffraction light of the first HPDLC layers 201 and the 2nd HPDLC layers 202 is in opposite direction.
When 203 pair of the first HPDLC layer 201 of controller applies electric field, when not applying electric field to the 2nd HPDLC layers 202, emergent pupil
Light such as Fig. 6 in it is shown in solid；
When 203 pair of the first HPDLC layer 201 of controller does not apply electric field, and electric field is applied to the 2nd HPDLC layers 202, emergent pupil
Light as shown in the dotted line in Fig. 6.
Wherein, the first HPDLC layers 201 and the 2nd HPDLC layers 202 can include corresponding with the light of different wave length respectively
3 sublayers, exemplary, the first HPDLC layers 201 and the 2nd HPDLC layers 202 include and feux rouges (R light), green glow (G light) respectively
3 corresponding sublayers with blue light (B light).Each sublayer has higher diffraction efficiency to the light of respective color.
Waveguide display device 10 disclosed in the embodiment of the present invention, with larger field angle and is using small-sized image source
In the case of, it is possible to achieve full-color EL display, moreover, because the incident ray angle of visual field of relay optical system reduces, so that
Reduce the difficulty and complexity of relay optical system design.
Optionally, as shown in fig. 7, controller 203 can be also used for, in first time period T1, to the first HPDLC layers
201 apply electric field；
In second time period T2, electric field is applied to the 2nd HPDLC layers 202.
Further alternative, T1 and T2 duration can be with identical, and is 1/2f, and wherein f is image refresh rate.It is exemplary
, such as image refresh rate f is 60Hz, then T1=T2=1/120s, and the display screen that now image source is used should at least have 120Hz
Refresh rate.
Those skilled in the art can also flexibly determine the quantity of period and continuing for each period according to actual needs
Duration.
Optionally, image source 101 be can be also used for, and the first view field image is generated in T1, and the second visual field is generated in T2
Image, wherein, the first view field image and the second view field image collectively form complete visual field, for expanding the angle of visual field.It is exemplary
, as shown in fig. 6, the visual field in X+ directions is the first visual field, the visual field in X- directions is the second visual field.When the first view field image and
Two view field images are switched fast, exemplary, when refresh rate is more than 120Hz, are corresponding to complete field of view image refresh rate
60Hz, now it is considered that the complete field of view image observed is continuous, and the angle of visual field is larger.
Those skilled in the art are, it should be understood that the image that image source 101 is generated, quantity that can be according to the period, each period
Duration and the angle of visual field that is actually needed be determined.
Optionally, as shown in figure 8, the waveguide that input coupler 103 includes be coupled into grating can include respectively with feux rouges (R
Light), green glow (G light) and the monochromatic gratings of blue light (B light) corresponding 3, exemplary, respectively R gratings, G gratings and B light
Grid, each monochrome grating has higher diffraction efficiency to the light of respective color.Those skilled in the art are, it should be understood that waveguide is coupled into
Multiple monochromatic gratings that grating includes, the multiple monochromatic gratings that can include with waveguide decoupling grating are corresponding, exemplary, ripple
Leading decoupling grating includes the monochromatic grating of 3 corresponding with R light, G light and B light, then waveguide, which is coupled into grating, also includes 3 correspondence ripples
Long monochromatic grating.
Further alternative, it can be HPDLC layers that waveguide, which is coupled into grating, wherein, HPDLC layers include the light with different wave length
Corresponding multiple sublayers, exemplary, HPDLC layers include 3 sublayers corresponding with R light, G light and B light.
After the full-color image that image source 101 is shown, repeated optical system 102, panchromatic light enters input coupler
103.The B light compositions that panchromatic light can be introduced into the corresponding grating of R light, panchromatic light are coupled into waveguide, then can be with
G light and B are optically coupled into waveguide by the G light grating corresponding with R light respectively.
Example is above are only, those skilled in the art can also be combined into more in the case where not paying creative make great efforts
Many optional embodiments.
Further alternative, as shown in figure 9, waveguide 104 can include multiple ducting layers, exemplary, waveguide 104 can be with
Including first layer waveguide 1041, second layer waveguide 1042 and third layer waveguide 1043, panchromatic light enters after input coupler 103,
The B light compositions that can be introduced into the corresponding grating of B light, panchromatic light are coupled into first layer waveguide 1041, then, panchromatic
G light composition in light is coupled into second layer waveguide 1042 through the corresponding grating of G light, finally, the R light in panchromatic light into
The corresponding grating of lease making R light, is coupled into third layer waveguide 1043.Those skilled in the art are, it should be understood that what waveguide 104 included
Multiple ducting layers, the multiple monochromatic gratings that can include with waveguide decoupling grating are corresponding, exemplary, waveguide decoupling grating bag
The monochromatic grating of 3 corresponding with R light, G light and B light is included, then waveguide also includes 3 corresponding ducting layers.
Further alternative, multiple monochromatic gratings that waveguide decoupling grating includes can be located in multiple ducting layers respectively.
Exemplary, the sublayer corresponding with B light that the first HPDLC layers 201 include can be located at first layer waveguide 1041
In, for the B optocouplers propagated in first layer waveguide 1041 to be gone out.Similar, it is corresponding with G light that the first HPDLC layers 201 include
Sublayer can be located in second layer waveguide 1042, the sublayer corresponding with R light can be located in third layer waveguide 1043, respectively
For G light and R optocouplers to be gone out.
Likewise, the sublayer corresponding with B light that the 2nd HPDLC layers 202 include can be located in first layer waveguide 1041,
The sublayer corresponding with G light can be located in second layer waveguide 1042, and the sublayer corresponding with R light can be located at third layer waveguide
In 1043.
Waveguide display device disclosed in the embodiment of the present invention, in the case of with larger field angle, can use small chi
Very little image source, and corresponding can reduce to the volume of the miscellaneous part such as drive circuit that image source matches, simultaneously as in
The incident ray angle of visual field after optical system reduces, so that the difficulty and complexity of relay optical system design are reduced, and
And the number of lenses that relay optical system includes can be reduced, and then the volume of relay optical system can be reduced.
It should be appreciated that the invention is not limited in the flow and structure for being described above and being shown in the drawings,
And various modifications and changes can be being carried out without departing from the scope.The scope of the present invention is only limited by appended claim
System.
Claims (10)
1. a kind of waveguide display device, including image source, relay optical system, input coupler, waveguide, output coupler, control
Device processed, wherein,
Described image source, for display image；
The relay optical system, for input coupler described in the described image directive that shows described image source；
The input coupler, for the outgoing of the relay optical system to be optically coupled into the waveguide；
The output coupler, for the optocoupler propagated in the waveguide to be gone out, wherein, the output coupler includes waveguide coupling
Go out grating, the waveguide decoupling grating includes multiple monochromatic gratings corresponding with the light of different wave length.
2. waveguide display device according to claim 1, it is characterised in that the waveguide decoupling grating is holographic polymer
HPDLC layers of dispersed liquid crystal, described HPDLC layers includes multiple sublayers corresponding with the light of the different wave length.
3. waveguide display device according to claim 2, it is characterised in that the output coupler includes what is be stacked
First HPDLC layers and the 2nd HPDLC layer, the described first HPDLC layers with the described 2nd HPDLC layers diffraction light it is in opposite direction；
The waveguide display device also include controller, for control to the described first HPDLC layer with the described 2nd HPDLC layers apply
Added electric field.
4. waveguide display device according to claim 3, it is characterised in that the described first HPDLC layers and described second
HPDLC layers include 3 sublayers corresponding with feux rouges, green glow and blue light respectively.
5. waveguide display device according to claim 3, it is characterised in that the controller is additionally operable to,
In first time period, to the described first HPDLC layers of application electric field；
In second time period, to the described 2nd HPDLC layers of application electric field.
6. waveguide display device according to claim 1, it is characterised in that the input coupler is coupled into light including waveguide
Grid, the waveguide, which is coupled into grating, includes multiple monochromatic gratings corresponding with the light of different wave length；
Wherein, the waveguide is coupled into multiple monochromatic light that multiple monochromatic gratings that grating includes include with the waveguide decoupling grating
Grid are corresponding.
7. waveguide display device according to claim 6, it is characterised in that it is HPDLC layers, institute that the waveguide, which is coupled into grating,
Stating HPDLC layers includes multiple sublayers corresponding with the light of the different wave length.
8. waveguide display device according to claim 7, it is characterised in that described HPDLC layers include with feux rouges, green glow and
3 corresponding sublayers of blue light.
9. waveguide display device according to claim 6, it is characterised in that the waveguide includes multiple ducting layers, described
Multiple ducting layers are corresponding with multiple monochromatic gratings that the waveguide decoupling grating includes respectively.
10. waveguide display device according to claim 9, it is characterised in that it is multiple that the waveguide decoupling grating includes
Monochromatic grating is located in the multiple ducting layer respectively.
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| CN201710458524.9A CN107121824A (en) | 2017-06-16 | 2017-06-16 | Waveguide display device |
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| CN201710458524.9A CN107121824A (en) | 2017-06-16 | 2017-06-16 | Waveguide display device |
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