CN208156307U - Near-eye display system - Google Patents
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- CN208156307U CN208156307U CN201820579923.0U CN201820579923U CN208156307U CN 208156307 U CN208156307 U CN 208156307U CN 201820579923 U CN201820579923 U CN 201820579923U CN 208156307 U CN208156307 U CN 208156307U
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Abstract
The utility model provides a kind of near-eye display system, including image display device, beam deflecting device and array image-forming device.Array image-forming device includes at least two diffraction planes.Beam deflecting device makes modulated subgraph light be incident on the incidence angle of diffraction plane corresponding with the subgraph light in the angle of diffraction bandwidth of the corresponding diffraction plane, and modulated subgraph light is made to be incident on the incidence angle of diffraction plane not corresponding with the subgraph light outside the angle of diffraction bandwidth of the not corresponding diffraction plane.Diffraction plane carries out reflection to subgraph light of the incidence angle in angle of diffraction bandwidth and is focused at human eye and forms subgraph to be shown.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 big visual field, high resolution features, and relative to the near-eye display system small volume with traditional visual system.
Description
Technical field
The utility model relates to augmented reality fields, in particular to a kind of near-eye display system.
Background technique
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, generallys use miniature image display as image source, and cooperate 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 display 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.
Utility model content
In view of this, the nearly eye the purpose of this utility model is to provide a kind of compact of large visual field high resolution is shown
System, to solve the above problems.
To achieve the above object, the utility model provides the following technical solutions：
The utility model preferred embodiment provides a kind of near-eye display system, including image display device, light beam deflection dress
It sets and includes at least two diffraction planes with array image-forming device, the array image-forming device；
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 every beam subgraph light, every beam
Subgraph light is corresponding with each diffraction plane；
The beam deflecting device makes modulated for carrying out phase-modulation to incident subgraph light as needed
Subgraph light is incident on diffraction of the incidence angle in the corresponding diffraction plane of diffraction plane corresponding with the subgraph light
In the bandwidth of angle, and the incidence angle for making modulated subgraph light be incident on diffraction plane not corresponding with the subgraph light exists
Outside the angle of diffraction bandwidth of the not corresponding diffraction plane；
The diffraction plane is used to carry out subgraph light of the incidence angle in the angle of diffraction bandwidth reflection to be focused at human eye
Subgraph to be shown is formed, the subgraph light to incidence angle outside angle of diffraction bandwidth is also used to and penetrates；
After described image display device has exported all subgraph light of image to be displayed, in human eye formation to aobvious
Show that subgraph can visually be spliced into the image to be displayed in user；
Real world light passes through the beam deflecting device and array image-forming device enters human eye and forms environment map
Picture.
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 be modulated with formed to
Show the image light of information.
Optionally, described image display device includes light source module group, polarization spectro component and image-display units, the light
Source mould group 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 polarisation passes through completely, and S polarisation is 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 through the modulated light beam of described image display unit, P polarization light beam is again passed through polarization spectro
Enter in beam deflecting 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, 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, the near-eye display system further includes controllable back layer.
Optionally, the beam deflecting device is liquid crystal optical phased array or liquid crystal polarization gratings.
Optionally, the array image-forming device includes two or three diffraction planes.
Optionally, the angle of diffraction bandwidth of the diffraction plane is 5 °~10 °.
Near-eye display system provided by the embodiment of the utility model passes through to image display device, beam deflecting device and battle array
The ingenious integrated and design of column imaging device, is sequentially output at least two beam subgraph light of an image to be displayed, by each
Diffraction plane reflection is focused at human eye and forms subgraph to be shown corresponding with every beam subgraph light, is imitated using persistence of vision
It answers, the subgraph to be shown formed in human eye is enable visually to be spliced into image to be displayed in user.Therefore, which shows
The field angle of system is equal to the sum of the field angle for all diffraction planes that array image-forming device includes.Also, every son to be shown
The resolution ratio of image can resolution ratio that is identical and being equal to image to be displayed.Therefore the near-eye display system has big view field image
There is high-resolution while display, and shown relative to the nearly eye applied to augmented reality with traditional visual system
System bulk is smaller.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described.It should be appreciated that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is a kind of block diagram of near-eye display system provided by the embodiment of the utility model.
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 system；10- image display device；20- beam deflecting device；30- array image-forming device；
31- diffraction plane；11- light source module group；13- image-display units；111- lighting source；113- beam shaping bundling device；1111-
Red LED light source；1112- green LED light source；1113- blue led light source；1131- collimator and extender shaping component；1133- closes beam
Unit；11311- the first collimator and extender shaping unit；11312- the second collimator and extender shaping unit；11313- third collimator and extender
Shaping unit；The first diffraction plane of 311-；The second diffraction plane of 312-；313- third diffraction plane；The controllable back layer of 40-；15-
Light orientation element；16- polarization spectro component；17- scanning means；18- collimation lens.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe.Obviously, described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.The component of the utility model embodiment being usually described and illustrated herein in the accompanying drawings can be matched with a variety of different
It sets to arrange and design.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Reality based on the utility model
Apply example, those skilled in the art's every other embodiment obtained without making creative work belongs to
The range of the utility model protection.
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 in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.In the utility model
In description, term " first ", " second ", " third ", " the 4th " etc. are only used for distinguishing description, and should not be understood as only or imply
Relative importance.
Near-eye display system 1 provided by the embodiment of the utility model, can be applied to HMD (Head Mount Display,
Wear-type visual device), the augmented realities equipment such as intelligent glasses, herein with no restrictions.
Referring to FIG. 1, Fig. 1 is a kind of block diagram of near-eye display system 1 provided by the embodiment of the utility model.It should
Near-eye display system 1 includes image display device 10, beam deflecting device 20 and array image-forming device 30.The array image-forming dress
Setting 30 includes at least two diffraction planes 31.
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 every beam subgraph light.Often
Beam subgraph light is corresponding with each diffraction plane 31.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 beam deflecting device 20 is for carrying out phase-modulation to incident subgraph light as needed, after making modulation
Subgraph light be incident on the incidence angle of diffraction plane 31 corresponding with the subgraph light in the corresponding diffraction plane 31
Angle of diffraction bandwidth in, and modulated subgraph light is made to be incident on diffraction plane 31 not corresponding with the subgraph light
Incidence angle is outside the angle of diffraction bandwidth of the not corresponding diffraction plane 31.
The diffraction plane 31 is used to carry out subgraph light of the incidence angle in the angle of diffraction bandwidth reflection to be focused at people
Eye-shaped is at subgraph to be shown.The diffraction plane 31 is also used to the progress of the subgraph light to incidence angle outside angle of diffraction bandwidth
Through, and assembled without reflection, to avoid subgraph light not corresponding with the diffraction plane 31 by the diffraction plane
31 reflections enter human eye after assembling, and interfere.The diffraction plane 31 has the function of converting plane wave to spherical wave.
After described image display device 10 has exported all subgraph light of image to be displayed, human eye formed to
Display subgraph can visually be spliced into the image to be displayed in user.When it is implemented, can be by adjusting the figure
The frequency of every beam subgraph light and the time interval of the every width image to be displayed of output are exported as display device 10, and cooperate tune
The working condition of whole beam deflecting device 20, utilizes persistence of vision principle, so that it may so that the subgraph to be shown formed in human eye
The image to be displayed can be visually spliced into user.
Real world light passes through the beam deflecting device 20 and array image-forming device 30 enters human eye and forms ring
Border image.
Near-eye display system 1 provided by the embodiment of the utility model passes through to image display device 10, beam deflecting device
20 and array image-forming device 30 ingenious integrated and design, be sequentially output at least two beam subgraph light of an image to be displayed,
Human eye is focused at by the reflection of each diffraction plane 31 and forms subgraph to be shown corresponding with every beam subgraph light, utilizes view
Feel residual effect, the subgraph to be shown formed in human eye is enable visually to be spliced into image to be displayed in user.Therefore, should
The field angle of near-eye display system 1 is equal to the sum of the field angle for all diffraction planes 31 that array image-forming device 30 includes.Also,
The resolution ratio of every subgraph to be shown can resolution ratio that is identical and being equal to image to be displayed.Therefore the near-eye display system 1 has
There is high-resolution, and relative to the existing applied to enhancing of traditional visual system while having the display of big view field image
Real near-eye display system small volume.
Since image display device 10, the structure of beam deflecting device 20 and array image-forming device 30 and set-up mode can be with
There are many kinds of.Therefore, conceived based on above-mentioned utility model, the specific structure of near-eye display system 1 may be, but not limited to, such as figure
2, shown in Fig. 3, 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 nearly eye shown in Fig. 10 are aobvious
Show that system 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 knot shown in Fig. 10
Structure releases 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 mould group 11, image-display units 13.Light source module group 11 includes lighting source 111 and beam shaping bundling device 113.
Lighting source 111 can be using laser light source, LED light source etc..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, herein with no restrictions.
Beam shaping bundling device 113 is set in the optical path of lighting source 111, the light for issuing to lighting source 111
Beam processing is closed in the shaping of Shu Jinhang collimator and extender.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
The light beam that shaping unit 11311 is used to issue red LED light source 1111 carries out collimator and extender Shape correction.Second collimator and extender
The light beam that shaping unit 11312 is used to issue green LED light source 1112 carries out collimator and extender Shape correction.Third collimator and extender
The light beam that shaping unit 11313 is used to issue blue led light source 1113 carries out collimator and extender Shape correction.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 prism.
Image-display units 13 form the figure of information to be displayed for the energy of the light of the offer of modulated light source mould group 11
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.
The beam deflecting device 20 is set between image-display units 13 and array image-forming device 30, for according to need
Phase-modulation is carried out to incident subgraph light, subgraph light is made to deflect.Optionally, in the present embodiment,
Beam deflecting device 20 is liquid crystal optical phased array.Liquid crystal optical phased array is based on liquid crystal electrically controlled birefringence and balzed grating,
The programmable optical beam deflecting device of principle, basic principle are to control liquid crystal molecule pointing vector by external electric field to change liquid crystal layer
Birefringent characteristic, so that phase-modulation is carried out to light wave wavefront, when liquid crystal layer is in periodically-varied to the phase-modulation of light beam
When, liquid crystal layer is equivalent to balzed grating, realizes the glittering of diffraction light particular level, macroscopically shows as light beam deflection.
Array image-forming device 30 includes at least two diffraction planes 31.The diffraction plane 31, which has, converts plane wave to
The function of spherical wave.Each diffraction plane 31 has narrow angle of diffraction bandwidth, such as 5 °~10 °.Diffraction plane 31 can be to incidence angle
Subgraph light in angle of diffraction bandwidth carries out reflection convergence, carries out to subgraph light of the incidence angle outside angle of diffraction bandwidth
Through.It is clear that diffraction plane 31 can be the plane with diffraction function of tilting prisms, multiple tilting prisms gluing shapes
At array image-forming device 30, as shown in Figure 2.Diffraction plane 31 or diffraction plane mirror, multiple diffraction plane 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 diffraction planes 31, point
It is not denoted as the first diffraction plane 311, the second diffraction plane 312 and third diffraction plane 313.
By taking near-eye display system 1 shown in Fig. 2 as an example, which carries out the mistake that a virtual image is shown
Journey can be：One width image to be displayed is divided into three subgraphs to be shown in the horizontal direction, is denoted as the first son to be shown respectively
Image, the second subgraph to be shown and third subgraph to be shown.Firstly, referring to Fig. 4, image display device 10 is according to first
Subgraph to be shown exports a branch of subgraph light, which is denoted as the first subgraph light.Enable the first subgraph
Light is corresponding with the first diffraction plane 311, and the incidence angle that the first subgraph light is incident on the second diffraction plane 312 is spread out second
It penetrates outside the angle of diffraction bandwidth of plane 312, the first subgraph light is incident on the incidence angle of third diffraction plane 313 in third diffraction
Outside the angle of diffraction bandwidth of plane 313.Then, the first subgraph light is transmitted to beam deflecting device 20, can make light beam deflection dress
It sets 20 not work, the first subgraph light continues to transmit along original optical path.When the first subgraph light is transmitted to the first diffraction plane
The first subgraph to be shown is formed in human eye after being assembled when 311 by the reflection of the first diffraction plane 311.Due to the first subgraph light
The incidence angle of the second diffraction plane 312 is incident on outside the angle of diffraction bandwidth of the second diffraction plane 312, the first subgraph light enters
The incidence angle of third diffraction plane 313 is mapped to outside the angle of diffraction bandwidth of third diffraction plane 313, then the first subgraph light enters
It is penetrated when being mapped to the second diffraction plane 312 and third diffraction plane 313, and is assembled without reflection, to avoid
Interference.Also, in actual design, can improve as far as possible the first diffraction plane 311 reflection diffraction efficiency (up to 95% with
On), energy loss is not only reduced, but also reduce the light for being incident on the second diffraction plane 312 and third diffraction plane 313,
It can further avoid interfering.Secondly, referring to Fig. 5, image display device 10 is a branch of according to the second subgraph output to be shown
The subgraph light is denoted as the second subgraph light by subgraph light.Enable the second subgraph light and the second diffraction plane 312
It is corresponding.When second subgraph light is transmitted to beam deflecting device 20, beam deflecting device 20 carries out the second subgraph light
Phase-modulation makes one angle of the second subgraph light deflection, and the second subgraph light after deflection is incident on the first diffraction
For the incidence angle of plane 311 outside the angle of diffraction bandwidth of the first diffraction plane 311, the second subgraph light after deflection is incident on
The incidence angle of three diffraction planes 313 is outside the angle of diffraction bandwidth of third diffraction plane 313.Then, the second subgraph after deflection
When light is transmitted to the first diffraction plane 311, continue to transmit to the second diffraction plane 312 through the first diffraction plane 311, by the
The second subgraph to be shown is formed in human eye after the reflection convergence of two diffraction planes 312.Since the second subgraph light is incident on
For the incidence angle of one diffraction plane 311 outside the angle of diffraction bandwidth of the first diffraction plane 311, the second subgraph light is incident on third
The incidence angle of diffraction plane 313 is outside the angle of diffraction bandwidth of third diffraction plane 313, then the second subgraph light is incident on first
It is penetrated when diffraction plane 311 and third diffraction plane 313, and is assembled without reflection, to avoid interfering.And
And in actual design, the reflection diffraction efficiency (up to 95% or more) that can improve the second diffraction plane 312 as far as possible not only subtracts
Few energy loss, and reduce the light for being incident on third diffraction plane 313, it can further avoid interfering.Finally, please join
Fig. 6 is read, image display device 10 exports a branch of subgraph light according to third subgraph to be shown, which is denoted as
Third subgraph light.Enable third subgraph light corresponding with third diffraction plane 313.Third subgraph light is transmitted to light beam
When arrangement for deflecting 20, beam deflecting device 20 carries out phase-modulation to third subgraph light, makes third subgraph light deflection
One angle, and the third subgraph light after deflection is incident on the incidence angle of the first diffraction plane 311 in the first diffraction plane
Outside 311 angle of diffraction bandwidth, the incidence angle that the third subgraph light after deflection is incident on the second diffraction plane 312 is spread out second
It penetrates outside the angle of diffraction bandwidth of plane 312.Then, third subgraph light after deflection is transmitted to the first diffraction plane 311 and
When two diffraction planes 312, continue to pass to third diffraction plane 313 through the first diffraction plane 311 and the second diffraction plane 312
It is defeated, third subgraph to be shown is formed in human eye after being assembled by the reflection of third diffraction plane 313.Since third subgraph light enters
The incidence angle of the first diffraction plane 311 is mapped to outside the angle of diffraction bandwidth of the first diffraction plane 311, third subgraph light is incident
To the second diffraction plane 312 incidence angle outside the angle of diffraction bandwidth of the second diffraction plane 312, then third subgraph light is incident
It is penetrated when to the first diffraction plane 311 and the second diffraction plane 312, and is assembled without reflection, to avoid doing
It disturbs.Also, in actual design, can also improve as far as possible third diffraction plane 313 reflection diffraction efficiency (up to 95% with
On), to reduce energy loss.
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 cooperate the working condition of adjustment beam deflecting device 20, it is residual using vision
Stay principle, so that it may so that the first subgraph, the second subgraph to be shown and the third subgraph to be shown to be shown formed in human eye
As can visually be spliced into the image to be displayed in user, as shown in Figure 7.
Optionally, referring to Fig. 8, near-eye display system 1 further includes controllable back layer 40.The controllable back layer 40 can
By opacity from clearly becoming dark or opaque, to improve the virtual image (figure to be shown of the display of near-eye display system 1
Picture) contrast.In specific implementation process, controllable back layer 40 can be electrochromic layer.Electrochromic layer can be close to battle array
Column imaging device 30 can also be spaced an air gap or optical material with array image-forming device 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 issued carry out collimator and extender Shape correction.Under normal conditions, since LED light source belongs to the face with certain size
Light source (usually 1mm), according to law of conservation of energy, by collimator and extender shaping component 1131, treated that light beam is not exhausted
Pair 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 15 is set on 1131 emitting light path.In present embodiment, light orientation element 15 can be angular-sensitive and spread out
Penetrate element or holographic element.
Image-display units 13 be it is reflective, for example, reflective LOCS shows source.Described image display device 10 is also
Including polarization spectro component 16.Vibration spectrum groupware is incident non-polarized light can be divided into the vertical line polarisation of two beams, wherein P
Polarisation passes through completely, and a kind of optical element that S polarisation is reflected with 45 degree of angles.In present embodiment, polarization spectro component 16
It can be PBS prism (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 15 is handled, into polarization spectro component 16, S-polarization light beam reflexes to image by polarization spectro component 16 and shows
Show that unit 13, image-display units 13 carry out light energy modulation, warp to S-polarization light beam according to the gray scale of subgraph to be shown at this time
The modulated light beam of image-display units 13 is converted to P polarization light beam, and it is laggard that P polarization light beam is again passed through polarization spectro component 16
Enter in beam deflecting device 20.
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.
As shown in Figure 10, Figure 10 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 17.Accordingly, image display device 10
It is slightly different in the optical parameter and structure and Fig. 2 of middle light source module group 11.
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.Lighting source 111 can use laser light 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 set on the emitting light path of collimator and extender shaping component 1131, expand 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 17 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 17 can select the device with scanning function in well-known technique.For example,
The scanning means 17 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 17 are MEMS scanning means.MEMS scanning means can be scanned by a two dimension MEMS
Galvanometer composition or two one-dimensional MEMS scanning galvanometer 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 dress
Setting can be deflected according to driving signal, namely realize the purpose of output image light by scanning this process.
Optionally, described image display device 10 further includes collimation lens 18.The collimation lens 18 is set to scanning dress
It sets on 17 emitting light path, carries out collimation processing for the emergent ray to scanning means 17, enable light after treatment
It is entered in a manner of approximately parallel in subsequent array image-forming device 30.
The beam deflecting device 20 can be identical as beam deflecting device 20 shown in Fig. 2, that is, uses liquid crystal optics phase
Control battle array.The beam deflecting device 20 can also be different from beam deflecting device 20 shown in Fig. 2, for example, by using liquid-crystal polarized-light
Grid.The basic principle of liquid crystal polarization gratings is to apply periodic electric field in special liquid crystal cell, to make the folding of liquid crystal layer
The change of rate generating period is penetrated, the phase difference of transmission diffraction light can be changed, the modulation to light, liquid-crystal polarized-light may be implemented
Grid base, can be inclined by integrating quick electric light half-wave by circular deflection optical diffraction to+1 grade or -1 grade in the handedness of control incident light
Delayer shake to control the handedness of polarization, fast LC polarization grating light beam deflection module can be createed.
Optionally, in the present embodiment, array image-forming device 30 includes two diffraction planes 31, is also denoted as the first diffraction
Plane 311 and the second diffraction plane 312.Near-eye display system 1, which carries out the process that a virtual image is shown, can be：By a width
Image to be displayed is divided into two subgraphs to be shown in the horizontal direction, is denoted as the first subgraph to be shown and the second subgraph to be shown
Picture；When image display device 10 exports a branch of subgraph light according to the first subgraph to be shown, the not work of beam deflecting device 20
Make, which continues to be transmitted to the first diffraction plane 311 along original optical path, after being assembled by the reflection of the first diffraction plane 311
The first subgraph to be shown is formed in human eye；Image display device 10 exports a branch of subgraph light according to the second subgraph to be shown
Line, beam deflecting device 20 work, and make one angle of subgraph light deflection, and the subgraph light after deflection penetrates the first diffraction
Plane 311, which is reflected to assemble by the second diffraction plane 312, forms the second subgraph to be shown.It is defeated to adjust described image display device 10
The frequency of every beam subgraph light and the time interval of the every width image to be displayed of output out, and cooperate adjustment beam deflecting device
20 working condition utilizes persistence of vision principle, so that it may so that in the first subgraph to be shown of human eye formation and second to aobvious
Show that subgraph can visually be spliced into the image to be displayed in user.Due to the above process and similar above, only letter herein
It describes.
From the above it can be seen that image display device 10 can change mutually to constitute in Fig. 2, Fig. 3, Fig. 8, Fig. 9 and Figure 10
New near-eye display system 1.Controllable back layer 40 in Fig. 8 is respectively applied in Fig. 2, Fig. 3, Fig. 9 and Figure 10 new to constitute
Near-eye display system 1.And Fig. 2, Fig. 3, Fig. 8, Fig. 9 and near-eye display system shown in Fig. 10 1 are only illustrative.Example
Such as, the number of the diffraction plane 31 and/or lighting source 111 in Fig. 2, Fig. 3, Fig. 8, Fig. 9 and Figure 10 is increased or decreased just with structure
The near-eye display system 1 of Cheng Xin.
Near-eye display system 1 provided by the embodiment of the utility model passes through to image display device 10, beam deflecting device
20 and array image-forming device 30 ingenious integrated and design, be sequentially output at least two beam subgraph light of an image to be displayed,
Human eye is focused at by the reflection of each diffraction plane 31 and forms subgraph to be shown corresponding with every beam subgraph light, utilizes view
Feel residual effect, the subgraph to be shown formed in human eye is enable visually to be spliced into image to be displayed in user.Therefore, should
The field angle of near-eye display system 1 is equal to the sum of the field angle for all diffraction planes 31 that array image-forming device 30 includes.Also,
The resolution ratio of every subgraph to be shown can resolution ratio that is identical and being equal to image to be displayed.Therefore the near-eye display system 1 has
There is high-resolution, and relative to the existing applied to enhancing of traditional visual system while having the display of big view field image
Real near-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 above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of near-eye display system, which is characterized in that filled including image display device, beam deflecting device and array image-forming
It sets, the array image-forming device includes at least two diffraction planes；
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 every beam subgraph light, every Shu Zitu
As light is corresponding with each diffraction plane；
The beam deflecting device makes modulated subgraph for carrying out phase-modulation to incident subgraph light as needed
As light is incident on angle of diffraction band of the incidence angle in the corresponding diffraction plane of diffraction plane corresponding with the subgraph light
In width, and make modulated subgraph light be incident on the incidence angle of diffraction plane not corresponding with the subgraph light this not
Outside the angle of diffraction bandwidth of corresponding diffraction plane；
The diffraction plane is used to carry out subgraph light of the incidence angle in the angle of diffraction bandwidth reflection to be focused at human eye and be formed
Subgraph to be shown is also used to the subgraph light to incidence angle outside angle of diffraction bandwidth and penetrates；
After described image display device has exported all subgraph light of image to be displayed, in the son to be shown that human eye is formed
Image can visually be spliced into the image to be displayed in user；
Real world light passes through the beam deflecting device and array image-forming device enters 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 exporting 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 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 polarisation passes through completely, and S polarisation is 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 beam deflecting device.
4. near-eye display system according to claim 3, which is characterized in that described image display device further includes light orientation
Element, the emitting light path of the collimator and extender shaping component is arranged in the light orientation element, for choosing special angle light beam.
5. 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.
6. near-eye display system according to claim 5, which is characterized in that the scanning means is MEMS scanning means.
7. near-eye display system according to claim 1-6, which is characterized in that the near-eye display system also wraps
Include controllable back layer.
8. near-eye display system according to claim 1-6, which is characterized in that the beam deflecting device is liquid
Brilliant optical phased array or liquid crystal polarization gratings.
9. near-eye display system according to claim 1-6, which is characterized in that the array image-forming device includes
Two or three diffraction planes.
10. near-eye display system according to claim 1-6, which is characterized in that the diffraction of the diffraction plane
Angle bandwidth is 5 °~10 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820579923.0U CN208156307U (en) | 2018-04-20 | 2018-04-20 | Near-eye display system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820579923.0U CN208156307U (en) | 2018-04-20 | 2018-04-20 | Near-eye display system |
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| Publication Number | Publication Date |
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| CN208156307U true CN208156307U (en) | 2018-11-27 |
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ID=64380234
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108333781A (en) * | 2018-04-20 | 2018-07-27 | 深圳创维新世界科技有限公司 | Near-eye display system |
| CN109298542A (en) * | 2018-12-12 | 2019-02-01 | 深圳创维新世界科技有限公司 | Timing three-dimensional projection display system |
-
2018
- 2018-04-20 CN CN201820579923.0U patent/CN208156307U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108333781A (en) * | 2018-04-20 | 2018-07-27 | 深圳创维新世界科技有限公司 | Near-eye display system |
| CN108333781B (en) * | 2018-04-20 | 2023-10-27 | 深圳创维新世界科技有限公司 | Near-to-eye display system |
| CN109298542A (en) * | 2018-12-12 | 2019-02-01 | 深圳创维新世界科技有限公司 | Timing three-dimensional projection display system |
| CN109298542B (en) * | 2018-12-12 | 2023-12-29 | 深圳创维新世界科技有限公司 | Time sequence three-dimensional projection display system |
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