CN108333780A - Near-eye display system - Google Patents
Near-eye display system Download PDFInfo
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- CN108333780A CN108333780A CN201810358548.1A CN201810358548A CN108333780A CN 108333780 A CN108333780 A CN 108333780A CN 201810358548 A CN201810358548 A CN 201810358548A CN 108333780 A CN108333780 A CN 108333780A
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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
Abstract
The present invention provides a kind of near-eye display system, including image display device, array image-forming device and liquid crystal optical switch.Array image-forming device includes at least two imaging minute surfaces, and each imaging lens face paste has can thoroughly can anti-film.Liquid crystal optical switch includes at least two sub- liquid crystal optical switches, and each imaging minute surface is corresponding with every sub- liquid crystal optical switch.Sub- liquid crystal shutter is in open state in a branch of subgraph light corresponding with the sub- liquid crystal shutter of image display device output, and the subgraph light corresponding with the sub- liquid crystal shutter for enabling that image display device exports is formed subgraph to be shown across sub- liquid crystal shutter after the convergence of imaging mirror-reflection in human eye.After image display device has exported all subgraph light of image to be displayed, image to be displayed can be visually spliced into user in the subgraph to be shown that human eye is formed.The near-eye display system has the characteristics that big visual field, high-resolution, and relative to the near-eye display system small volume with traditional visual system.
Description
Technical field
The present invention relates to augmented reality fields, in particular to a kind of near-eye display system.
Background technology
Augmented reality (AR, Augmented Reality) is to carry out reality to real scene using dummy object or information
The technology of enhancing is widely used in each field such as scientific research, military affairs, industry, game, video, education.At present mainstream be applied to increase
The near-eye display system of strong reality, generally uses miniature image display as image source, and coordinate traditional visual system
It realizes and enhancing is shown.It is limited to existing technology and technological level, the resolution ratio of miniature image display is difficult to improve.And
And the display visual field of traditional visual system and the volume of visual system are closely related.Increase and shows visual field, visual light
The volume of system can increase severely therewith.Therefore, the near-eye display system applied to augmented reality of mainstream has resolution ratio at present
Low and visual field is small or bulky problem.
Invention content
In view of this, the purpose of the present invention is to provide a kind of nearly eye of compact of large visual field high resolution display systems
System, to solve the above problems.
To achieve the above object, the present invention provides the following technical solutions：
Present pre-ferred embodiments provide a kind of near-eye display system, including image display device, array image-forming device and
Liquid crystal optical switch, the array image-forming device include at least two imaging minute surfaces, each imaging lens face paste have can thoroughly can anti-film, institute
It includes at least two sub- liquid crystal optical switches to state liquid crystal optical switch, and each imaging minute surface is corresponding with every sub- liquid crystal optical switch；
Described image display device is used to be sequentially output at least two beam subgraph light of image to be displayed, wherein every width
Image to be displayed includes at least two subgraphs to be shown, and every subgraph to be shown is corresponding with per beam subgraph light, per beam
Subgraph light is corresponding with every sub- liquid crystal shutter；
The imaging minute surface is used to carry out reflection convergence to incident subgraph light；
The sub- liquid crystal shutter is used in a branch of subgraph corresponding with the sub- liquid crystal shutter of described image display device output
It is in open state when as light, makes the subgraph light corresponding with the sub- liquid crystal shutter that described image display device exports by institute
Stating after imaging mirror-reflection is assembled passes through the sub- liquid crystal shutter that can form subgraph to be shown in human eye；
The sub- liquid crystal shutter is additionally operable to export in described image display device a branch of not corresponding with the sub- liquid crystal shutter
It is closed when subgraph light；
After described image display device has exported all subgraph light of image to be displayed, each sub- liquid is passed through
The subgraph to be shown that crystalline substance switch is formed in human eye can visually be spliced into the image to be displayed in user；
Real world light passes through the array image-forming device and liquid crystal optical switch to enter human eye and forms ambient image.
Optionally, described image display device includes light source module group and image-display units, and the light source module group includes shining
Mingguang City source and beam shaping bundling device, the beam shaping bundling device include collimator and extender shaping component and combined beam unit；
The lighting source, for providing multi beam illuminating ray；
The collimator and extender shaping component, for carrying out collimator and extender shaping to every beam illuminating ray；
The combined beam unit, for synthesizing the light beam after the collimator and extender shaping component collimator and extender Shape correction
Single beam；
Described image display unit, the energy of the single beam for being exported to the combined beam unit is modulated to be waited for being formed
Show the image light of information.
Optionally, described image display device includes light source module group and scanning means；
The light source module group, for providing collimation light pencil；
The scanning means, the light for being emitted to the light source module group carry out high speed deflection to form image light.
Optionally, the scanning means is MEMS scanning means.
Optionally, described image display device includes light source module group, polarization spectro component and image-display units, the light
Source module includes lighting source and collimator and extender shaping component；
The lighting source, for providing illuminating ray；
The collimator and extender shaping component, for carrying out collimator and extender shaping to the illuminating ray；
The polarization spectro component, it is vertical that non-polarized light for collimator and extender shaping component outgoing is divided into two beams
Line polarisation, wherein P polarisations pass through completely, and S polarisations are reflected with 45 degree of angles；
Described image display unit, for carrying out light energy to S-polarization light beam according to the gray scale of subgraph to be shown at this time
Modulation, is converted to P polarization light beam, P polarization light beam is again passed through polarization spectro through the modulated light beam of described image display unit
Enter in array image-forming device after component.
Optionally, described image display device further includes light orientation element, and the light orientation element is arranged in the collimation
The emitting light path for expanding shaping component, for choosing special angle light beam.
Optionally, the near-eye display system further includes controllable back layer.
Optionally, the imaging minute surface is diffraction plane or continuous curved surface.
Optionally, the energy of the subgraph linear light line corresponding with each sub- liquid crystal shutter of described image display device output with
Its corresponding sub- liquid crystal shutter increases away from image display device distance and is increased.
Optionally, the reflectivity of the imaging minute surface increases along the direction far from image display device.
Near-eye display system provided by the invention passes through to image display device, array image-forming device and liquid crystal optical switch
Ingenious integrated and design, is sequentially output at least two beam subgraph light of an image to be displayed, passes through each imaging mirror-reflection
Being focused at human eye formation subgraph to be shown corresponding with per beam subgraph light is made using persistence of vision effect in human eye shape
At subgraph to be shown can visually be spliced into image to be displayed in user.Therefore, the field angle of the near-eye display system
Equal to the sum of the field angle for all imaging minute surfaces that array image-forming device includes.Also, the resolution ratio of every subgraph to be shown
It can identical and equal to image to be displayed resolution ratio.Therefore the near-eye display system have big view field image show while have
Have a high-resolution, and relative to the near-eye display system volume applied to augmented reality with traditional visual system compared with
It is small.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described.It should be appreciated that the following drawings illustrates only certain embodiments of the present invention, therefore it is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is a kind of block diagram of near-eye display system provided in an embodiment of the present invention.
Fig. 2 is the structural schematic diagram of near-eye display system in an embodiment.
Fig. 3 is the structural schematic diagram of near-eye display system in another embodiment.
Fig. 4 is the light path schematic diagram that near-eye display system shown in Fig. 2 shows the first subgraph to be shown.
Fig. 5 is the light path schematic diagram that near-eye display system shown in Fig. 2 shows the second subgraph to be shown.
Fig. 6 is the light path schematic diagram that near-eye display system shown in Fig. 2 shows third subgraph to be shown.
Fig. 7 is the light path schematic diagram that near-eye display system shown in Fig. 2 shows image to be displayed.
Fig. 8 is the structural schematic diagram of near-eye display system in another embodiment.
Fig. 9 is the structural schematic diagram of near-eye display system in another embodiment.
Figure 10 is the structural schematic diagram of near-eye display system in another embodiment.
Icon:1- near-eye display systems；10- image display devices；30- array image-forming devices；50- liquid crystal optical switches；31-
It is imaged minute surface；51- liquid crystal optical switches；11- light source module groups；13- image-display units；111- lighting sources；113- light beams are whole
Shape bundling device；1111- red LED light sources；1112- green LED light sources；1113- blue led light sources；1131- collimator and extender shapings
Component；1133- combined beam units；11311- the first collimator and extender shaping units；11312- the second collimator and extender shaping units；
11313- third collimator and extender shaping units；311- first is imaged minute surface；312- second is imaged minute surface；313- third imaging lens
Face；The first sub- liquid crystal optical switches of 511-；The second sub- liquid crystal optical switches of 512-；The sub- liquid crystal optical switch of 513- thirds；15- scanning dresses
It sets；17- collimation lenses；18- light orientation elements；19- polarization spectro components；The controllable back layers of 70-.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes.Obviously, described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.It is logical
The component for the embodiment of the present invention being often described and illustrated herein in the accompanying drawings can be arranged and be designed with a variety of different configurations.
Therefore, below the detailed description of the embodiment of the present invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiment of the present invention, people in the art
The every other embodiment that member is obtained without making creative work, shall fall within the protection scope of the present invention.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.In description of the invention
In, term " first ", " second ", " third ", " the 4th " etc. are only used for distinguishing description, and should not be understood as only or imply opposite
Importance.
Near-eye display system 1 provided in an embodiment of the present invention, can be applied to HMD, (Head Mount Display, wear
Formula visual device), the augmented realities equipment such as intelligent glasses, be not limited herein.
Referring to FIG. 1, Fig. 1 is a kind of block diagram of near-eye display system 1 provided in an embodiment of the present invention.The nearly eye
Display system 1 includes image display device 10, array image-forming device 30 and liquid crystal optical switch 50.The array image-forming device 30 wraps
Include at least two imaging minute surfaces 31, it is each be imaged minute surface 31 post can thoroughly can anti-film, the liquid crystal optical switch 50 includes at least two
A sub- liquid crystal optical switch 51, each imaging minute surface 31 are corresponding with every sub- liquid crystal optical switch 51.
Described image display device 10 is used to be sequentially output at least two beam subgraph light of image to be displayed.Wherein, often
Width image to be displayed includes at least two subgraphs to be shown, and every subgraph to be shown is corresponding with per beam subgraph light.Often
Beam subgraph light is corresponding with every sub- liquid crystal shutter.Pair image to be displayed is the virtual image that near-eye display system 1 is shown, i.e.,
The virtual display of the artificial additional information of real world.In order to improve display effect, the resolution of every subgraph to be shown
Rate can be identical.And the size of every subgraph to be shown can be the same or different.
The imaging minute surface 31 is used to carry out reflection convergence to incident subgraph light.Since each imaging minute surface 31 pastes
Have can thoroughly can anti-film, therefore the imaging minute surface 31 be additionally operable to incident subgraph light carry out across, can continue to
Next imaging minute surface 31 transmits.
The sub- liquid crystal shutter is used to export a branch of son corresponding with the sub- liquid crystal shutter in described image display device 10
Open state is in when image light, the subgraph light corresponding with the sub- liquid crystal shutter for making described image display device 10 export
Pass through the sub- liquid crystal shutter that can form subgraph to be shown in human eye after being assembled by the imaging minute surface 31 reflection.The sub- liquid
Crystalline substance switch be additionally operable to described image display device 10 export it is a branch of with the sub- liquid crystal shutter not corresponding subgraph light when at
In closed state, the subgraph light not corresponding with the sub- liquid crystal shutter exported to avoid described image display device 10 is by institute
It states and enters human eye across the sub- liquid crystal shutter after the imaging reflection of minute surface 31 is assembled.Wherein, the sub- liquid crystal shutter can be liquid
A part for crystal light shutter 50 can also be an independent small size liquid crystal optical switch 50.With the development of technology, when electroluminescent
When the switching rate of electro-chromic switch reaches liquid crystal optical switch 50, can also use electrochromism switch in place liquid crystal optical switch 50 and/
Or sub- liquid crystal optical switch 51.
After described image display device 10 has exported all subgraph light of image to be displayed, each son is passed through
The subgraph to be shown that liquid crystal shutter is formed in human eye can visually be spliced into the image to be displayed in user.Specific implementation
When, every figure to be shown of frequency and output of every beam subgraph light can be exported by adjusting described image display device 10
The time interval of picture, and coordinate the on off state for adjusting every sub- liquid crystal shutter, utilize persistence of vision principle, so that it may so as to pass through
The subgraph to be shown that each sub- liquid crystal shutter is formed in human eye can visually be spliced into the figure to be shown in user
Picture.
Real world light passes through the array image-forming device 30 and liquid crystal optical switch 50 to enter human eye and forms environment
Image.
Near-eye display system 1 provided in an embodiment of the present invention passes through to image display device 10,30 and of array image-forming device
The ingenious integrated and design of liquid crystal optical switch 50, is sequentially output at least two beam subgraph light of an image to be displayed, by every
A reflection of imaging minute surface 31 is focused at human eye and forms subgraph to be shown corresponding with per beam subgraph light, utilizes persistence of vision
Effect enables the subgraph to be shown formed in human eye to be visually spliced into image to be displayed in user.Therefore, the nearly eye is aobvious
Show that the field angle of system 1 is equal to the sum of the field angle for all imaging minute surfaces 31 that array image-forming device 30 includes.Also, every width waits for
Show that the resolution ratio of subgraph can identical and equal to image to be displayed resolution ratio.Therefore the near-eye display system 1 have regard greatly
There is high-resolution while field picture is shown, and be applied to the close of augmented reality relative to traditional visual system
Eye display system small volume.
Since image display device 10, the structure of array image-forming device 30 and liquid crystal optical switch 50 and set-up mode can have
It is a variety of.Therefore, foregoing invention is based on to conceive, the concrete structure of near-eye display system 1 may be, but not limited to, as Fig. 2, Fig. 3,
Shown in Fig. 8, Fig. 9 and Figure 10.It should be understood that for ease of description, Fig. 2, Fig. 3, Fig. 8, Fig. 9 and near-eye display system shown in Fig. 10
1 is presented in the form of monocular.Those skilled in the art can according to fig. 2, Fig. 3, Fig. 8, Fig. 9 and structure shown in Fig. 10 release
Structure when near-eye display system 1 is binocular.
As shown in Fig. 2, Fig. 2 is the structure chart of near-eye display system 1 in an embodiment.Image display device 10 includes light
Source module 11 and image-display units 13.Light source module group 11 includes lighting source 111 and beam shaping bundling device 113.
Laser light source, LED light source etc. may be used in lighting source 111.Optionally, in the present embodiment, the illumination light
Source 111 is LED light source, which may include red LED light source 1111, green LED light source 1112 and blue led light source
1113.In another embodiment, the color of each LED can be configured according to actual needs in LED light source, to meet reality
The needs of border situation, are not limited herein.
Beam shaping bundling device 113 is set in the light path of lighting source 111, the light for being sent out to lighting source 111
Beam processing is closed in the shaping of Shu Jinhang collimator and extenders.Optionally, in the present embodiment, beam shaping bundling device 113 includes that collimation expands
Beam shaping component 1131 and combined beam unit 1133.Collimator and extender shaping component 1131 includes the first collimator and extender shaping unit
11311, the second collimator and extender shaping unit 11312 and third collimator and extender shaping unit 11313.Wherein, the first collimator and extender
Shaping unit 11311 is used to carry out collimator and extender Shape correction to the light beam that red LED light source 1111 is sent out.Second collimator and extender
Shaping unit 11312 is used to carry out collimator and extender Shape correction to the light beam that green LED light source 1112 is sent out.Third collimator and extender
Shaping unit 11313 is used to carry out collimator and extender Shape correction to the light beam that blue led light source 1113 is sent out.Under normal conditions,
First collimator and extender shaping unit 11311, the second collimator and extender shaping unit 11312 and third collimator and extender shaping unit
11313 alignment precision may be required in several milliradians.Combined beam unit 1133 will be for that will pass through the first collimator and extender shaping list
First 11311, second collimator and extender shaping unit 11312 and 11313 collimator and extender Shape correction of third collimator and extender shaping unit
Light beam afterwards synthesizes single beam.Optionally, combined beam unit 1133 is x-cube type light-combining prisms.
The energy for the light that image-display units 13 are provided for modulated light source module 11 is to form the figure of information to be displayed
As light.Image-display units 13 can be reflective, or transmission-type.Optionally, in the present embodiment, scheme
As display unit 13 is transmission-type.For example, image-display units 13 are transmission-type LOCS (Liquid Crystal on
Silicon, liquid crystal on silicon) display source.
Array image-forming device 30 includes at least two imaging minute surfaces 31, it is each be imaged that minute surface 31 posts can thoroughly can anti-film.Institute
Imaging minute surface 31 is stated to be used to carry out reflection convergence to incident subgraph light.The imaging minute surface 31, which has, converts plane wave
For the function of spherical wave.It can be continuous curved surface or diffraction plane to be imaged minute surface 31.Optionally, in the present embodiment, at
As minute surface 31 is continuous curved surface.It is clear that imaging minute surface 31 can be the continuous curved surface of optical body, multiple optics are real
Body gluing forms array image-forming device 30, as shown in Figure 2.It is imaged minute surface 31 or curved mirror, multiple curved mirrors arrange shape
At array image-forming device 30, as shown in Figure 3.
Referring to Fig. 2 or Fig. 3, in the present embodiment, array image-forming device 30 includes three imaging minute surfaces 31, point
It is not denoted as the first imaging minute surface 311, second imaging minute surface 312 and third imaging minute surface 313.Correspondingly, liquid crystal optical switch 50 wraps
Three sub- liquid crystal optical switches 51 are included, are denoted as the first sub- liquid crystal optical switch 511, the second sub- liquid crystal optical switch 512 and third respectively
Liquid crystal optical switch 513.
It is as follows that the near-eye display system 1 that present embodiment provides carries out the process that a virtual image is shown：One width is waited for
Display image is divided into three subgraphs to be shown in the horizontal direction, is denoted as the first subgraph to be shown, the second son to be shown respectively
Image and third subgraph to be shown.First, referring to Fig. 4, image display device 10 is exported according to the first subgraph to be shown
A branch of subgraph light, the first sub- liquid crystal shutter are in open state, and the second sub- liquid crystal shutter and the sub- liquid crystal shutter of third, which are in, to close
Closed state.After the beam subgraph light is assembled by the first imaging reflection of minute surface 311, formed in human eye across the first sub- liquid crystal shutter
First subgraph to be shown.Since the second sub- liquid crystal shutter and the sub- liquid crystal shutter of third are closed, then first is being formed
When subgraph to be shown, the light after the reflection of minute surface 312 is assembled is imaged by second and across first across the first imaging minute surface 311
Human eye will not be entered by being imaged the light after the imaging minute surface 312 of minute surface 311 and second is assembled by the third imaging reflection of minute surface 313, be made
At interference.Secondly, referring to Fig. 5, image display device 10 exports a branch of subgraph light according to the second subgraph to be shown, the
Two sub- liquid crystal shutters are in open state, and the first sub- liquid crystal shutter and the sub- liquid crystal shutter of third are closed.The beam subgraph
A light part is transmitted after being assembled by the first imaging reflection of minute surface 311 to the first sub- liquid crystal shutter, and another part passes through the first one-tenth
As minute surface 311.A subgraph light part across the first imaging minute surface 311 is worn after the second imaging reflection convergence of minute surface 312
It crosses the second sub- liquid crystal shutter and forms the second subgraph to be shown in human eye, another part passes through the second imaging minute surface 312 to third
Minute surface 313 is imaged to transmit.The subgraph light part transmitted to third imaging minute surface 313 is reflected by third imaging minute surface 313
It assembles to the sub- liquid crystal shutter transmission of third, another part passes through third to be imaged minute surface 313.Similarly, due to the first sub- liquid crystal shutter
It is closed with the sub- liquid crystal shutter of third, therefore when forming the second subgraph to be shown, by the first imaging 311 He of minute surface
Third, which is imaged the light after the reflection of minute surface 313 is assembled, will not enter human eye, interfere.Finally, referring to Fig. 6, image is shown
Device 10 exports a branch of subgraph light according to third subgraph to be shown, and the sub- liquid crystal shutter of third is in open state, the first son
Liquid crystal shutter and the second sub- liquid crystal shutter are closed.Similarly, a part of of the beam subgraph light can pass through first
It is imaged minute surface 311 and second and is imaged minute surface 312 by after the third imaging reflection convergence of minute surface 313, exist across the sub- liquid crystal shutter of third
Human eye forms third subgraph to be shown.Since the first sub- liquid crystal shutter and the second sub- liquid crystal shutter are closed,
In formation third subgraph to be shown, the light after the reflection of minute surface 312 is assembled is imaged not by the first imaging minute surface 311 and second
Human eye can be entered, interfered.
In above process, can be exported by adjusting described image display device 10 frequency of every beam subgraph light with
And the time interval of the every width image to be displayed of output, and coordinate the on off state for adjusting every sub- liquid crystal shutter, it is residual using vision
Stay principle, so that it may so that the first subgraph to be shown formed in human eye across each sub- liquid crystal shutter, second to be shown
Subgraph and third subgraph to be shown can visually be spliced into the image to be displayed in user, as shown in Figure 7.
From the above process as can be seen that image display device 10 export subgraph light across imaging minute surface 31 to next
When a imaging minute surface 31 transmits, energy can decay.Therefore, in order to avoid the first subgraph to be shown, the second subgraph to be shown
It is different with third subgraph energy to be shown, it is imaged minute surface 312 in the first imaging minute surface 311, second and third is imaged minute surface 313
Reflectivity it is identical when, image display device 10 can be made according to the energy of the subgraph light of the first subgraph to be shown output
The energy of the subgraph light measure, exported according to the second subgraph to be shown, the subgraph exported according to third subgraph to be shown
As the energy of light is sequentially increased.Or in image display device 10 according to the subgraph light of the first subgraph output to be shown
Energy, according to the energy of the subgraph light of the second subgraph to be shown output and according to third subgraph output to be shown
When the energy of subgraph light is equal, the first imaging minute surface 311, second imaging minute surface 312 and third is made to be imaged the anti-of minute surface 313
The rate of penetrating is sequentially increased, in order to avoid the first subgraph, the second subgraph to be shown and third subgraph energy difference to be shown to be shown.
That is, the energy of each subgraph to be shown to avoid image to be displayed is different, image display device 10 can be made defeated
The energy of the subgraph light beam corresponding with each sub- liquid crystal shutter gone out, which is shown with corresponding sub- liquid crystal shutter away from image, to be filled
10 distances are set to increase and increase or the reflectivity of the imaging minute surface 31 is made along the direction far from image display device 10 to increase.
As shown in figure 8, Fig. 8 is the structure chart of near-eye display system 1 in another embodiment.It is similar with Fig. 2, it is different
It is：Image display device 10 does not use image-display units 13, and uses scanning means 15.Accordingly, image display device 10
The optical parameter and structure of middle light source module group 11 are slightly different with Fig. 2.
Optionally, light source module group 11 includes lighting source 111 and beam shaping bundling device 113.Beam shaping bundling device 113
Including collimator and extender shaping component 1131 and combined beam unit 1133.Laser light may be used in lighting source 111 in light source module group 11
Source, LED light source etc..Collimator and extender shaping component 1131 is for exporting collimation light pencil.Optionally, collimator and extender shaping component
1131 can be made of focal length collimating mirror, short focus focus lamp, aperture and short focus collimating mirror.The light that lighting source 111 exports
Beam is converged to hot spot again after focal length collimating mirror and short focus focus lamp, and aperture takes center to the hot spot after convergence
Domain filters out spot side-lobe, obtains the small light spot that energy is concentrated, and last small light spot is again Energy distribution by short focus collimating mirror collimation
Uniform collimation light pencil.When lighting source 111 exports polychromatic light, beam shaping bundling device 113 further includes combined beam unit
1133.Combined beam unit 1133 can be arranged on the emitting light path of collimator and extender shaping component 1131, be expanded for collimation whole
The light beam that shape component 1131 exports carries out conjunction beam；Or be arranged on the emitting light path of lighting source 111, for lighting unit
The light beam of output carries out conjunction Shu Houzai and exports to collimator and extender shaping component 1131.
Scanning means 15 is arranged on the emitting light path of light source module group 11, and the light for being emitted to light source module group 11 carries out
High speed deflection is to form image light.Scanning means 15 can select the device with scanning function in known technology.For example,
The scanning means 15 can be MEMS scanning means, piezoelectric ceramics fibre-optic scanner, Controlled Crystal scanning means etc..It is optional
Ground, in the present embodiment, scanning means 15 are MEMS scanning means.MEMS scanning means can be by a two dimension MEMS scannings
Galvanometer forms or two one-dimensional MEMS scanning galvanometers compositions.Light source module group 11 (is sent to user's eye according to image to be sent
Virtual image in eyeball) color and gray scale require be modulated after light be input to MEMS scanning means.MEMS scanning dresses
Set can according to drive signal into horizontal deflection, namely by scan this process realize output image light purpose.
Optionally, described image display device 10 further includes collimation lens 17.The collimation lens 17 is set to scanning dress
It sets on 15 emitting light path, carries out collimation processing for the emergent ray to scanning means 15, enable light after treatment
It is entered in a manner of approximately parallel in subsequent array image-forming device 30.
Similarly, array image-forming device 30 can also use array image-forming in Fig. 3 other than using structure as shown in Figure 8
The structure of device 30 is imaged minute surface 31 or curved mirror, multiple curved mirror arrangement form array image-forming devices 30.
As shown in figure 9, Fig. 9 is the structure chart of near-eye display system 1 in another embodiment.It is similar with Fig. 2, it is different
It is：
Lighting source 111 is monochromatic source, such as the LED light source of green.Thus, beam shaping bundling device 113 does not include
Combined beam unit 1133 only includes collimator and extender shaping component 1131.Collimator and extender shaping component 1131 is used for green LED light source
1112 light beams sent out carry out collimator and extender Shape correction.Under normal conditions, since LED light source belongs to the face with certain size
Light source (be usually 1mm), according to law of conservation of energy, by collimator and extender shaping component 1131, treated that light beam is not exhausted
To collimated light beam.It, can be in collimator and extender shaping component for the display resolution of the raising near-eye display system 1 of higher degree
One light orientation element 18 is set on 1131 emitting light path.In present embodiment, light orientation element 18 can be that angular-sensitive is spread out
Penetrate element or holographic element.
Image-display units 13 are reflective, and for example, reflective LOCS shows source.Described image display device 10 is also
Including polarization spectro component 19.Spectrum groupware of shaking is can incident non-polarized light to be divided into the vertical line polarisation of two beams, wherein P
Polarisation passes through completely, and a kind of optical element that S polarisations are reflected with 45 degree of angles.In present embodiment, polarization spectro component 19
Can be PBS prisms (polarization beam splitter, polarization splitting prism).
When it is implemented, the light beam that lighting source 111 exports passes through the 1131 collimator and extender shaping of collimator and extender shaping component
And after light orientation element 18 is handled, into polarization spectro component 19, S-polarization light beam reflexes to image by polarization spectro component 19 and shows
Show that unit 13, image-display units 13 carry out light energy modulation, warp according to the gray scale of subgraph to be shown at this time to S-polarization light beam
13 modulated light beam of image-display units is converted to P polarization light beam, and it is laggard that P polarization light beam is again passed through polarization spectro component 19
Enter in array image-forming device 30.
In other embodiments, above-mentioned polarization spectrum groupware can also with it is inclined can thoroughly can antiplane mirror replace.
But use it is inclined can thoroughly can antiplane mirror can decay to beam energy.
Optionally, in the present embodiment, imaging minute surface 31 is diffraction plane.Specifically, imaging minute surface 31 can be flat
Face base type binary diffraction mirror surface, the binary diffraction mirror surface can convert plane wave to spherical wave.It is clear that
It is imaged the diffraction plane that minute surface 31 can be tilting prisms, multiple tilting prisms gluings form array image-forming device 30, such as Fig. 9 institutes
Show.It is imaged minute surface 31 or diffraction plane mirror, multiple diffraction plane mirror arrangement form array image-forming devices 30 such as Figure 10 institutes
Show.It should be noted that in present embodiment, the first imaging minute surface 311, second is imaged minute surface 312 and third is imaged minute surface 313
Angle of inclination may be the same or different.Correspondingly, the first imaging minute surface 311, second be imaged minute surface 312 and third at
As the binary diffraction pattern of minute surface 313 may be the same or different.
Referring to Fig. 9, optionally, near-eye display system 1 further includes controllable back layer 70.The controllable back layer 70
Opacity can be become dark or opaque from clear, it is (to be shown with the virtual image for improving the display of near-eye display system 1
Image) contrast.In specific implementation process, controllable back layer 70 can be electrochromic layer.Electrochromic layer can be close to
Array image-forming device 30 can also be spaced an air gap or optical material with array image-forming device 30.
From the above it can be seen that image display device 10 and array image-forming device 30 in Fig. 2, Fig. 3, Fig. 8, Fig. 9 and Figure 10
It can be combined with each other.For example, the image display device 10 in image display device 10 and Fig. 8 in Fig. 2 is exchanged new to constitute
Two kinds of near-eye display systems 1.In another example the controllable back layer 70 in Fig. 9 is respectively applied in Fig. 2, Fig. 3, Fig. 8 and Figure 10
To constitute two kinds of new near-eye display systems 1.And Fig. 2, Fig. 3, Fig. 8, Fig. 9 and near-eye display system shown in Fig. 10 1 are only
Schematically.For example, increasing or decreasing the number of the imaging minute surface 31 in Fig. 2, Fig. 3, Fig. 8, Fig. 9 and Figure 10 just to constitute newly
Near-eye display system 1.In another example increase or decrease the number of the lighting source 111 in Fig. 2, Fig. 3, Fig. 8, Fig. 9 and Figure 10 just with
Constitute new near-eye display system 1.
Near-eye display system 1 provided in an embodiment of the present invention passes through to image display device 10,30 and of array image-forming device
The ingenious integrated and design of liquid crystal optical switch 50, is sequentially output at least two beam subgraph light of an image to be displayed, by every
A reflection of imaging minute surface 31 is focused at human eye and forms subgraph to be shown corresponding with per beam subgraph light, utilizes persistence of vision
Effect enables the subgraph to be shown formed in human eye to be visually spliced into image to be displayed in user.Therefore, the nearly eye is aobvious
Show that the field angle of system 1 is equal to the sum of the field angle for all imaging minute surfaces 31 that array image-forming device 30 includes.Also, every width waits for
Show that the resolution ratio of subgraph can identical and equal to image to be displayed resolution ratio.Therefore the near-eye display system 1 have regard greatly
There is high-resolution while field picture is shown, and be applied to the close of augmented reality relative to traditional visual system
Eye display system small volume.
Any feature disclosed in this specification (including any accessory claim, abstract and attached drawing), except non-specifically chatting
It states, can be replaced by other alternative features that are equivalent or have similar purpose.That is, unless specifically stated, each feature is only
It is an example in a series of equivalent or similar characteristics.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of near-eye display system, which is characterized in that including image display device, array image-forming device and liquid crystal optical switch,
The array image-forming device includes at least two imaging minute surfaces, each imaging lens face paste have can thoroughly can anti-film, the liquid crystal light opens
Pass includes at least two sub- liquid crystal optical switches, and each imaging minute surface is corresponding with every sub- liquid crystal optical switch；
Described image display device is used to be sequentially output at least two beam subgraph light of image to be displayed, wherein every width waits showing
Diagram picture includes at least two subgraphs to be shown, and every subgraph to be shown is corresponding with per beam subgraph light, per Shu Zitu
As light is corresponding with every sub- liquid crystal shutter；
The imaging minute surface is used to carry out reflection convergence to incident subgraph light；
The sub- liquid crystal shutter is used in a branch of subgraph light corresponding with the sub- liquid crystal shutter of described image display device output
Open state is in when line, make the subgraph light corresponding with the sub- liquid crystal shutter that described image display device exports by it is described at
Pass through the sub- liquid crystal shutter that can form subgraph to be shown in human eye after being assembled as mirror-reflection；
The sub- liquid crystal shutter is additionally operable to export a branch of subgraph not corresponding with the sub- liquid crystal shutter in described image display device
As being closed when light；
After described image display device has exported all subgraph light of image to be displayed, opened across each sub- liquid crystal
The image to be displayed can be visually spliced into user by closing the subgraph to be shown formed in human eye；
Real world light passes through the array image-forming device and liquid crystal optical switch to enter human eye and forms ambient image.
2. near-eye display system according to claim 1, which is characterized in that described image display device includes light source module group
And image-display units, the light source module group include lighting source and beam shaping bundling device, the beam shaping bundling device packet
Include collimator and extender shaping component and combined beam unit；
The lighting source, for providing multi beam illuminating ray；
The collimator and extender shaping component, for carrying out collimator and extender shaping to every beam illuminating ray；
The combined beam unit, for the light beam after the collimator and extender shaping component collimator and extender Shape correction to be synthesized monochromatic light
Beam；
Described image display unit, the energy of the single beam for being exported to the combined beam unit are modulated to be shown to be formed
The image light of information.
3. near-eye display system according to claim 1, which is characterized in that described image display device includes light source module group
And scanning means；
The light source module group, for providing collimation light pencil；
The scanning means, the light for being emitted to the light source module group carry out high speed deflection to form image light.
4. near-eye display system according to claim 3, which is characterized in that the scanning means is MEMS scanning means.
5. near-eye display system according to claim 1, which is characterized in that described image display device includes light source die
Group, polarization spectro component and image-display units, the light source module group include lighting source and collimator and extender shaping component；
The lighting source, for providing illuminating ray；
The collimator and extender shaping component, for carrying out collimator and extender shaping to the illuminating ray；
The polarization spectro component, it is inclined that the non-polarized light for collimator and extender shaping component outgoing is divided into the vertical line of two beams
Light, wherein P polarisations pass through completely, and S polarisations are reflected with 45 degree of angles；
Described image display unit, for carrying out light energy modulation to S-polarization light beam according to the gray scale of subgraph to be shown at this time,
P polarization light beam is converted to through the modulated light beam of described image display unit, after P polarization light beam is again passed through polarization spectro component
Into in array image-forming device.
6. near-eye display system according to claim 5, which is characterized in that described image display device further includes light orientation
Element, the emitting light path in the collimator and extender shaping component is arranged in the light orientation element, for choosing special angle light beam.
7. according to claim 1-6 any one of them near-eye display systems, which is characterized in that the near-eye display system also wraps
Include controllable back layer.
8. according to claim 1-6 any one of them near-eye display systems, which is characterized in that the imaging minute surface is flat for diffraction
Face or continuous curved surface.
9. according to claim 1-6 any one of them near-eye display systems, which is characterized in that described image display device exports
Subgraph light corresponding with each sub- liquid crystal shutter energy with corresponding sub- liquid crystal shutter away from image display device away from
Increase from increase.
10. according to claim 1-6 any one of them near-eye display systems, which is characterized in that the reflection of the imaging minute surface
Rate increases along the direction far from image display device.
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| CN201810358548.1A CN108333780A (en) | 2018-04-20 | 2018-04-20 | Near-eye display system |
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