CN107290852B - Nearly eye display device - Google Patents
Nearly eye display device Download PDFInfo
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- CN107290852B CN107290852B CN201610226930.8A CN201610226930A CN107290852B CN 107290852 B CN107290852 B CN 107290852B CN 201610226930 A CN201610226930 A CN 201610226930A CN 107290852 B CN107290852 B CN 107290852B
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- eye display
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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
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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
- G02B2027/0118—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility
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- Optics & Photonics (AREA)
Abstract
A kind of nearly eye display device includes an at least optical projection system.Optical projection system is to by image projecting to target position, wherein optical projection system includes image output module, objective lens, aperture coding module and eyepiece group.Image output module is to provide image.Light of the objective lens to receive the image, wherein objective lens include the first lens group and the second lens group.Aperture coding module is to receive the light of the image from the first lens group and the light of the image is sent to the second lens group, multiple coding patterns are wherein provided to aperture coding module timing, so that image timing is converted to multiple relaying pictures by objective lens.Eyepiece group will be will relay as being sent to target position.
Description
Technical field
The present invention relates to a kind of nearly eye display devices.
Background technique
We live in the three-dimensional world, however the two dimension that traditional display technology is provided solely for lacking depth information is aobvious
Show.Two dimension display greatly limits the information content that people obtain cognition to the rich and varied world.Electronic technology, optical technology and light
The fast development of electronic technology etc. promotes dimension display technologies development.Dimension display technologies provide the depth letter of display object
Breath, agrees with modern for the demand of acquisition of information.So 3-D technology is received extensive attention in academia and business circles.
The nearly eye display technology of light field is to realize a kind of the simplest method of Three-dimensional Display.Light is introduced in nearly eye is shown
Reconstruct concept, pupil is entered for any three-dimensionalreconstruction point at least two light, thus human eye can be convenient to not
Image with depth carries out free focusing so that watch be more nearly it is true and natural.The nearly eye display technology of existing light field is adopted
With spatial multiplexing (spatial-multiplex) method, the image at multiple visual angles is generated using lens array to reach light
Field effect, but the method also reduces the resolution ratio of image.
Summary of the invention
Multiple embodiments of the invention provide a kind of nearly eye display device, using time multitask (time-
Multiplex) method and multiple aperture coding modules with different reflection graphic patterns, and reach light-field effects.Aperture encodes mould
Block has multiple codings, and code aperture forms different reflection graphic patterns according to timing, and forms multiple corresponding reflection graphic patterns according to timing
Image, and then promoted the depth of field.In part embodiment, it is independent of one another to design reflection graphic patterns, by all independent views
Angle information adds up and constitutes light field.Alternatively, in part embodiment, it is interdependent each other and encode to design reflection graphic patterns, will
All interdependent Viewing-angle informations add up and constitute light field, and further promote image brilliance.
An aspect of the invention provides a kind of nearly eye display device, includes an at least optical projection system.Optical projection system is to incite somebody to action
Image projecting is to target position, and wherein optical projection system includes image output module, objective lens, aperture coding module and eyepiece
Group.Image output module is to provide image.Light of the objective lens to receive the image, wherein objective lens include the first lens
Group and the second lens group.Aperture coding module is to receive the light of the image from the first lens group and by the light of the image
Line is sent to the second lens group, wherein provides to aperture coding module timing multiple coding patterns, so that objective lens are by image
Be converted to timing multiple relaying pictures.Eyepiece group will be will relay as being sent to target position.
In one or more embodiments of the invention, optical projection system includes the first inner total reflection mirror.First inner total reflection
Mirror is to be sent to aperture coding module for the light from the first lens group and by the reflection light from aperture coding module
It is sent to the second lens group.
In one or more embodiments of the invention, image output module includes solid state light emitter array and micro display list
Member.Micro display unit generates image to receive the light from solid state light emitter array.
In one or more embodiments of the invention, image output module further includes the second inner total reflection mirror.In second
Total reflection mirror is to be sent to micro display unit for the light from solid state light emitter array and by the reflection from micro display unit
Light is sent to objective lens.
In one or more embodiments of the invention, micro display unit and aperture coding module are all digital micro reflection
Mirror element (Digital Micromirror Device；DMD).
In one or more embodiments of the invention, each coding pattern is a reflection graphic patterns.
In one or more embodiments of the invention, the retroreflective regions of coding pattern are not on same position.
In one or more embodiments of the invention, at least part retroreflective regions of coding pattern are on same position.
In one or more embodiments of the invention, image output module includes at least one solid state light emitter, and image is defeated
The quantity of the type of the solid state light emitter of module is A out, and the transmission quantity per second of image output module is B, and the quantity of coding pattern is small
In B/A/60.
In one or more embodiments of the invention, optical projection system further includes reflecting mirror, comes from objective lens to receive
Light and the light is reflexed into the eyepiece group.
In one or more embodiments of the invention, the quantity of optical projection system is two.
In one or more embodiments of the invention, aperture coding module includes multiple code aperture (coded
Aperture those coding patterns) with timing are provided, code aperture is located at the different location of aperture coding module.
In one or more embodiments of the invention, code aperture is with two-dimensional array.
Detailed description of the invention
Fig. 1 is the floor map of the nearly eye display device of some embodiments of the invention.
Fig. 2 is the plan view of the aperture coding module of the nearly eye display device of Fig. 1.
Fig. 3 is the operation chart of the aperture coding module of Fig. 2.
Fig. 4 is the operation chart of the multiple element of the nearly eye display device of Fig. 1.
Fig. 5 is operation chart of the aperture coding module of part embodiment of the invention in another embodiment.
Fig. 6 is the floor map of the nearly eye display device of another embodiment of the present invention.
Wherein, appended drawing reference:
100: optical projection system
110: image output module
112: solid state light emitter array
114: micro display unit
116: the second inner total reflection mirrors
120: objective lens
122: the first lens groups
124: the second lens groups
130: aperture coding module
130a~130i: reflection graphic patterns
131~136: code aperture
140: eyepiece group
150: the first inner total reflection mirrors
170: reflecting mirror
P1: target position
RM: relaying picture
NED: nearly eye display device
Specific embodiment
Multiple embodiments of the invention will be disclosed with schema below, as clearly stated, the details in many practices
It will be explained in the following description.It should be appreciated, however, that the details in these practices is not applied to limit the present invention.Also
It is to say, in some embodiments of the present invention, the details in these practices is non-essential.In addition, for the sake of simplifying schema, one
A little known usual structures and element in the drawings by a manner of simply illustrating for it.
Fig. 1 is the floor map of the nearly eye display device NED of some embodiments of the invention.Nearly eye display device
NED includes an at least optical projection system 100.Optical projection system 100 is to by image projecting to target position P1 (such as the view of user
On film).Optical projection system 100 includes image output module 110, objective lens 120, aperture coding module 130 and eyepiece group 140.
Image output module 110 is to provide image.Objective lens 120 are to receive image, and wherein objective lens 120 include the first lens group
122 and second lens group 124.Aperture coding module 130 is to receive the light from the first lens group 122 and pass the light
It send between the second lens group 124, wherein 130 timing of aperture coding module multiple coding patterns is provided, so that objective lens
120 are converted to image timing on multiple relayings as RM.Eyepiece group 140 is relaying these as RM is sent to target position
P1, to constitute light field.
In multiple embodiments of the invention, design aperture coding module 130 has multiple and different code patterns according to timing
Case, different coding patterns determine different Viewing-angle informations.For example, in multiple embodiments of the invention, aperture coding
Module 130 can be digital minitype reflector element (Digital Micromirror Device；DMD), aperture coding module 130
Coding pattern be reflection graphic patterns.Digital minitype reflector element is the matrix being made of many small reflecting optics,
Each eyeglass represents a pixel.Each eyeglass has independent driving, can be by each micro mirror point by control element
The state of on or off is not set, decides whether to inject light into predetermined position (such as objective lens 120).In this way, can
There are multiple and different reflection graphic patterns according to timing Design aperture coding module 130.In other embodiments, aperture encodes mould
Block 130 can be liquid crystal on silicon (Liquid Crystal On Silicon；LCOS).It will be understood that in part embodiment,
Aperture coding module 130 can be the coding pattern penetrated, should not limit this with the reflection graphic patterns described in following implementation
The range of invention.
The depth of field of imaging system and the size of its aperture are related.In this, the coding pattern of aperture coding module 130 is designed
The range that size can be distributed less than script light, and the aperture as nearly eye display device NED, and then promote nearly eye display dress
Set the depth of field of NED.In addition, image corresponding to multiple and different coding patterns by combination aperture coding module 130, it can be with
Constitute a complete light field.In this way, which user can experience the stereoscopic vision with the depth of field in the light field.
The specific framework of the optical projection system 100 of present embodiment is first discussed in detail below, aperture coding module 130 is described in detail again later
Mode of operation.
Referring to Fig.1, in one or more embodiments of the invention, optical projection system 100 also includes the first inner total reflection mirror
(Total Internal Reflection Prism；TIR Prism)150.First inner total reflection mirror 150 will be will come from
The light of one lens group 122 is sent to aperture coding module 130 and is sent to the reflection light from aperture coding module 130
Second lens group 124.The operation light of the first lens group 122 and the second lens group 124 can be coupled by the first inner total reflection mirror 150
Thread path.
In this, use the first inner total reflection mirror 150 with will the light from the first lens group 122 by aperture coding module
130 are sent to the second lens group 124, although it is understood that should not be limited the scope of the invention with this.It, can in other embodiments
To use other common modes of the field to distinguish incident with reflection from the opticpath of aperture coding module 130,
For example, when light be polarised light when, such as aperture coding module 130 be liquid crystal on silicon when, polarization spectroscope can be used
With the configuration of quarter wavelength plate, and replace the first inner total reflection mirror.
In one or more embodiments of the invention, image output module 110 includes solid state light emitter array 112, micro- aobvious
Show unit 114, the second inner total reflection mirror 116.Solid state light emitter array 112 may include at least one solid state light emitter, such as feux rouges
Light source, green-light source or blue light source can be made of light emitting diode or Organic Light Emitting Diode.Second inner total reflection
Mirror 116 is to be sent to micro display unit 114 for the light from solid state light emitter array 112 and will come from micro display unit 114
Reflection light be sent to objective lens 120.Micro display unit 114 is to receive the light from solid state light emitter array 112.As
Aperture coding module 130, micro display unit 114 also can be digital minitype reflector element.Micro display unit 114 can corresponding selection
Property ground reflection light, to form scheduled image.In other embodiments, micro display unit 114 can be liquid crystal on silicon.
Similarly, in present embodiment, using the second inner total reflection mirror 116 by the light from solid state light emitter array 112
Objective lens 120 are sent to after the adjustment of micro display unit 114, although it is understood that should not limit the scope of the invention with this.In
In other embodiments, other common modes of the field can be used with the light by incident and reflection from micro display unit 114
Thread path distinguishes, for example, can matching using polarization spectroscope and quarter wavelength plate when light is polarised light
It sets, and replaces the second inner total reflection mirror.
It can also be configured in other optical elements, such as figure between solid state light emitter array 112 and the second inner total reflection mirror 116
It is painted lens and reflecting mirror, lens can be by each unit of light-ray condensing to aperture coding module 130, the compressible light of reflecting mirror
Space occupied by road, and then the volume of reduced projection system 100.
In some embodiments of the invention, although micro display unit 114 can all be several with aperture coding module 130
Word microreflection mirror element, but effect provided by the two is not identical.Micro display unit 114 is to selectively reflected light
Line, to form scheduled image.Aperture coding module 130 is to provide coding pattern as aperture.The technical field has logical
Normal skill can have effects that the setting that identical element replaces present embodiment with other.
In one or more embodiments of the invention, optical projection system 100 further includes reflecting mirror 170, comes to receive
Light is simultaneously reflexed to eyepiece group 140 by the light of objective lens 120, with the volume of reduced projection system 100.In addition, eyepiece group 140
It is made of, will relay as RM reduces and is sent to target position P1, to form light field in target position P1 multiple lens.
Fig. 2 is the plan view of the aperture coding module 130 of the nearly eye display device NED of Fig. 1.The aperture that Fig. 3 is Fig. 2 encodes
The operation chart of module 130.Referring concurrently to Fig. 1 to Fig. 3, in one or more embodiments of the invention, aperture encodes mould
Block 130 includes multiple code apertures 131~135 (coded aperture), and code aperture 131~135 is located at 130 apertures coding
The different location of module can independently drive respectively and reflect or not reflection light.By code aperture 131~135, aperture
Coding module 130 can provide multiple coding patterns (herein means reflection graphic patterns 130a~130e) according to timing, by image according to timing
Multiple relayings are converted to as RM.It relays on the retina for imaging in user after eyepiece group 140 as RM, multiple relayings are as RM
It combines and is formed with high-resolution image.
Specifically, it can sequentially be opened with the code aperture 131~135 of aperture coding module 130 in design drawing, and make hole
There are five different reflection graphic patterns 130a~130e according to timing tool for diameter coding module 130, i.e. code aperture 131~135 is sequentially
The retroreflective regions of these reflection graphic patterns 130a~130e, and the retroreflective regions of these reflection graphic patterns 130a~130e are not in same position
It sets, i.e. these reflection graphic patterns 130a~130e is independent each other.Reflection graphic patterns 130a~130e of aperture coding module 130
Multiple relayings are sequentially generated as RM, these relayings image on retina as RM passes through eyepiece group 140, and make on retina sequentially
With different Viewing-angle informations.In this, thus the retroreflective regions of these reflection graphic patterns are independent each other, the visual angle on retina
Information is also substantially independent mutually, and complete field information can be presented after combination.
The depth of field can be improved by above-mentioned aperture coding module 110 in multiple embodiments of the invention.Please refer to scape
Deep calculation formula: D2b/ (A ± bD), wherein b is to allow fuzzy loop diameter, and A is the aperture of aperture, i.e. aperture coding module
The width of the retroreflective regions of 130 reflection graphic patterns, D are the focal lengths of lens.Due to reducing in multiple embodiments of the invention
The aperture (i.e. A) of aperture coding module 130, therefore the depth of field can be improved.For example, code aperture is sequentially opened in this
131~135, according to reflection graphic patterns 130a~130e of the aperture coding module 130 of the 3rd figure, retroreflective regions are about aperture
The half of the complete area of coding module 130, can be improved twice of the depth of field.
Although it is understood that should not be limited the scope of the invention with this, in part embodiment, reflection graphic patterns each other can be with
It is not independent mutually, it can have coding appropriate, the embodiment of subsequent figure 5 can be referred to.
Fig. 4 is the operation chart of the multiple element of the nearly eye display device NED of Fig. 1.Referring concurrently to Fig. 1, Fig. 3 and figure
4.It include three kinds of solid state light emitters with image output module 110 in this, for red-light source, green-light source and blue light source, figure
The operation of red-light source, green-light source and blue light source is respectively indicated in 4 with R, G and B.As shown, in the 4th figure sequentially
Red-light source, green-light source and blue light source are opened, to reach preferable resolution ratio.
In order to make human eye it is observed that dynamic continuous image, the image per second that 60 dynamic changes are presented in design.Have
Quantity in view of reflection graphic patterns 130a~130e of aperture coding module 130 in present embodiment is five, in order to make every shadow
Information as can all form each visual angle by reflection graphic patterns 130a~130e, and in order to promote whole resolution ratio using timing
Property output different colours image, then the transmission quantity per second of image output module 110 should at least be designed as 900 (5 multiply multiplied by 3
With 60).
It changes for a mode, in one or more embodiments of the invention, the quantity of reflection graphic patterns should be according to image
The type of the solid state light emitter of output module 110 and the transmission quantity per second of image output module 110 and design.Specifically, if
It is intended to the rate of 60 video imagings per second on retina, and the quantity of the type of the solid state light emitter of image output module 110
Transmission quantity per second for A, image output module 110 is B, then the quantity for encoding the reflection graphic patterns of bore can be designed less than B/A/
60。
Fig. 5 is operation signal of the aperture coding module 130 of part embodiment of the invention in another embodiment
Figure.Present embodiment is similar to the embodiment of the 5th figure, the difference is that: the aperture coding module 130 of present embodiment is according to timing
With different reflection graphic patterns 130f~130i, and these reflection graphic patterns 130f~130i not independent (or referred to as phase mutually
According to).More particularly, at least part retroreflective regions of part reflection graphic patterns 130f~130i are on same position.In this, these
Independent reflection graphic patterns 130f~130i can not make letter of the same reflection pattern with multiple visual angles by coding mutually
Breath.The information at these visual angles in being overlapped on retina, and generates complete field information by eyepiece 140.In addition, by these
Interdependent Viewing-angle information can reduce the quantity of reflection graphic patterns 130f~130i, and then promote the brightness and resolution ratio of light field.
In present embodiment, the code aperture 136 of aperture coding module 130 is to be rectangular, and with two-dimensional array
And sequentially form reflection graphic patterns 130f~130i.Certainly it should not be limited the scope of the invention with this, code aperture 136 can also be
It is arranged in a manner of one-dimensional array or concentric annular.The other details of present embodiment generally as previously mentioned, do not repeating herein.
Fig. 6 is the floor map of the nearly eye display device NED of another embodiment of the present invention.Present embodiment and figure
1 embodiment is similar, the difference is that: the nearly eye display device NED of present embodiment includes two optical projection systems 100.In this,
The image output module 110 of two optical projection systems 100 can provide left eye the image information different from right eye respectively, left eye and the right side
The image information of eye combines in the brain of user, and then generates the effect of stereopsis.
As previously mentioned, optical projection system 100 by aperture coding module 130 to be encoded to image, when different
Sequence generates multiple and different relayings as RM.These relayings are sent to target position P1, P2 as RM by eyepiece group 140, to constitute light
?.
In present embodiment, the image output module 110 of optical projection system 100 is only simply schematically shown as directlying adopt and can provide
The display module of image.It will be understood that image output module 110 can use the configuration mode of the 1st figure.Present embodiment its
His details is generally as described in the embodiment of the 1st figure, and details are not described herein.
Multiple embodiments of the invention provide a kind of nearly eye display device, using time multitask (time-
Multiplex) method and multiple aperture coding modules with different reflection graphic patterns, and reach light-field effects.Aperture encodes mould
Block has multiple codings, and code aperture forms different reflection graphic patterns according to timing, and forms multiple corresponding reflection graphic patterns according to timing
Image, and then promoted the depth of field.In part embodiment, it is independent of one another to design reflection graphic patterns, by all independent views
Angle information adds up and constitutes light field.Alternatively, in part embodiment, it is interdependent each other and encode to design reflection graphic patterns, will
All interdependent Viewing-angle informations add up and constitute light field, and further promote image brilliance.
Although the present invention is disclosed above with numerous embodiments, however, it is not to limit the invention, any to be familiar with this
Those skilled in the art, without departing from the spirit and scope of the present invention, when can be used for a variety of modifications and variations, but these are changed and retouched
The protection scope of appended claims of the present invention should be contained in.
Claims (12)
1. a kind of nearly eye display device, which is characterized in that include an at least optical projection system, to by an image projecting a to target
Position, wherein the optical projection system include:
One image output module, to provide the image；
One objective lens, to receive the light of the image, wherein the objective lens include one first lens group and one second lens group；
One aperture coding module, to receive the light of the image from first lens group and transmit the light of the image
To second lens group, multiple coding patterns the aperture coding module timing wherein are provided, so that the objective lens are by the shadow
Multiple relaying pictures as timing are converted to, which includes that multiple code apertures with timing provide those volumes
Code pattern, those code apertures are located at the different location of the aperture coding module；And
One eyepiece group, those relaying pictures are sent to the target position.
2. nearly eye display device as described in claim 1, which is characterized in that the optical projection system includes:
One first inner total reflection mirror, the light from first lens group is sent to the aperture coding module and will be come from
The reflection light of the aperture coding module is sent to second lens group.
3. nearly eye display device as described in claim 1, which is characterized in that the image output module includes:
One solid state light emitter array；And
One micro display unit to receive the light from the solid state light emitter array, and generates the image.
4. nearly eye display device as claimed in claim 3, which is characterized in that the image output module further includes:
One second inner total reflection mirror, the light from the solid state light emitter array is sent to the micro display unit and will be come from
The reflection light of the micro display unit is sent to the objective lens.
5. nearly eye display device as claimed in claim 3, which is characterized in that the micro display unit and the aperture coding module are all
For digital minitype reflector element.
6. nearly eye display device as described in claim 1, which is characterized in that each of coding pattern is a reflection graphic patterns.
7. nearly eye display device as claimed in claim 6, which is characterized in that the retroreflective regions of those coding patterns are not same
On position.
8. nearly eye display device as claimed in claim 6, which is characterized in that at least part retroreflective regions of those coding patterns
On same position.
9. nearly eye display device as described in claim 1, which is characterized in that the image output module includes at least one solid-state
Light source, the quantity of the type of the solid state light emitter of the image output module are A, and the transmission quantity per second of the image output module is B,
The quantity of those coding patterns is less than B/A/60.
10. nearly eye display device as described in claim 1, which is characterized in that the optical projection system further includes:
One reflecting mirror, to receive the light from the objective lens and the light is reflexed to the eyepiece group.
11. nearly eye display device as described in claim 1, which is characterized in that the quantity of the optical projection system is two.
12. nearly eye display device as described in claim 1, which is characterized in that those code apertures are with two-dimensional array.
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| CN201610226930.8A CN107290852B (en) | 2016-04-13 | 2016-04-13 | Nearly eye display device |
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| CN201610226930.8A CN107290852B (en) | 2016-04-13 | 2016-04-13 | Nearly eye display device |
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| CN107290852B true CN107290852B (en) | 2019-07-12 |
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| CN104714303A (en) * | 2015-03-12 | 2015-06-17 | 深圳市安华光电技术有限公司 | Single-image-source binocular near-to-eye display device |
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| GB2434937A (en) * | 2006-02-06 | 2007-08-08 | Qinetiq Ltd | Coded aperture imaging apparatus performing image enhancement |
| JP2009229752A (en) * | 2008-03-21 | 2009-10-08 | Toshiba Corp | Display device, display method and headup display |
| US20160048019A1 (en) * | 2014-08-12 | 2016-02-18 | Osterhout Group, Inc. | Content presentation in head worn computing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5124821A (en) * | 1987-03-31 | 1992-06-23 | Thomson Csf | Large-field holographic binocular helmet visor |
| US6005722A (en) * | 1998-09-04 | 1999-12-21 | Hewlett-Packard Company | Optical display system including a light valve |
| CN104714303A (en) * | 2015-03-12 | 2015-06-17 | 深圳市安华光电技术有限公司 | Single-image-source binocular near-to-eye display device |
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