CN107664844A - A kind of optical waveguide display device for folding extension - Google Patents
A kind of optical waveguide display device for folding extension Download PDFInfo
- Publication number
- CN107664844A CN107664844A CN201710989755.2A CN201710989755A CN107664844A CN 107664844 A CN107664844 A CN 107664844A CN 201710989755 A CN201710989755 A CN 201710989755A CN 107664844 A CN107664844 A CN 107664844A
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- China
- Prior art keywords
- light wave
- coupling
- substrate
- light
- face
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Classifications
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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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/34—Optical coupling means utilising prism or grating
-
- 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 invention provides a kind of optical waveguide display device for folding extension, including light wave coupling-in face, light wave extension transferring substrate, light wave coupling-out face and light wave expansion module.Wherein, the direction that light wave coupling-in face is used to change external optical signals is made it into substrate, the light wave that light wave extension transferring substrate then inputs to coupling carries out reflection propagation can be transferred to up to outgoing position without loss, light wave coupling-out face is used to make light wave coupling output substrate, light wave expansion module expands the light wave to coupling output, so as to expand visual field.The present invention has the characteristics of visual field is big, compact-sized, can be used not only for wearable display, it may also be used for spread illumination, auto navigation are shown and the field such as bore hole 3D display.
Description
Technical field
The present invention relates to a kind of optical waveguide device, particularly a kind of optical waveguide display device for folding extension.
Background technology
At present, wearable display device and the compact FPD of other structures, notebook display system etc. be generally all
It is the image information of preview required for transmitting and show by optics.Such as display system can by using optical lens
At a certain distance from picture virtually to be included in front of human eye, walk roadside so as to side and browse in the electronic information of correlation
Hold.Generally, the core optical component of such display system is mainly made up of three parts：Light wave coupling input module, light
Ripple transferring substrate and light wave coupling output display component.The high-resolution of other light structure, compact, big visual field and image
The pursuit of always such optical system, wherein big visual field is particularly important.Although traditional imaging mode can obtain big regard
, but as the increase of visual field, the overall weight and volume of optical system can also increase therewith.Therefore light structure, compact
The design of optical system become the trend of such image device.
In order to solve the problems, such as traditional wearable device because optical imaging system weight and volume causes, present invention design
It is a kind of new to be used for a kind of optical waveguide display device for folding extension.
The content of the invention
In order to solve the above problems, the invention provides a kind of optical waveguide display device for folding extension.
In order to achieve the above object, present invention employs following technical scheme：
A kind of optical waveguide display device for folding extension, it is characterised in that：Include successively：Light wave coupling-in face, for changing
Become the direction of extraneous optical signal, make it into substrate；Light wave extends transferring substrate, and the light wave of coupling input is reflected
Propagation can be transferred to up to outgoing position without loss；Light wave coupling-out face, for making light wave coupling output substrate；Light
Wave spread component, the light wave of coupling output is expanded, so as to expand visual field.Wherein, light wave coupling-in face and light wave coupling
Close output face to connect with light wave extension transferring substrate respectively, positioned at the both ends of transferring substrate, light wave expansion module couples with light wave
The lower surface of output substrate is connected, and the opening position of output is coupled in substrate.It is of the invention mainly to utilize principles of internal reflection, regard
What angle amplification and prism-coupled light wave principle were realized.Image light waves after collimation lens collimates, it is coupled input face coupling
Conjunction is entered in glass substrate, and the glass substrate is can to carry out being totally reflected propagation inside it according to the light wave being coupled into
Come what is designed, such light wave can be transferred on required outgoing position structure without loss, defeated using the coupling of prism structure
Appear, make light wave coupling output substrate, light wave the expanding by extension light beam component of output, so as to reach increase observation visual field
Effect.
The present invention is used for a kind of optical waveguide display device for folding extension, also has the feature that：Light wave expansion group
Part is made up of a series of prism unit, and the surface of these prism units carries out transpassivation processing.
Compared with existing imaging guides system, the significant beneficial effect of the present invention is：Visual field is greatly and compact-sized.These
Advantage causes the present invention to be reduced compared to traditional imaging system, volume and weight, and under identical volume, visual field is more
Greatly, structure is also more compact, light and handy.Optical system of the present invention can be used not only for wearable display, it may also be used for spread illumination, automobile
The field such as navigation display and bore hole 3D display.
Brief description of the drawings
Fig. 1 is that the present invention is used for a kind of schematic diagram for the optical waveguide display device for folding extension；
Fig. 2 is the schematic diagram that the present invention is used for that light wave to transmit in the substrate in a kind of optical waveguide display device for folding extension；
Fig. 3 is the signal that the present invention is used for that light wave to transmit in expansion module in a kind of optical waveguide display device for folding extension
Figure；
Fig. 4 is that the present invention is used for a kind of a kind of application example for the optical waveguide display device for folding extension.
Embodiment
The specific work process of the present invention is described below in conjunction with accompanying drawing.
Fig. 1 is that the present invention is used for a kind of schematic diagram for the optical waveguide display device for folding extension.As shown in figure 1, this hair
Bright system composition includes：Light wave coupling-in face 10, light wave extension transferring substrate 11, light wave coupling-out face 12, light wave exhibition
Open component 13.Lightwave signal after collimation is incided on coupling-in face 10, changes light wave using the principle of prism erecting
Transmission direction, it is coupled into substrate, recycle the extension transferring substrate 11 of special construction, make light wave in the substrate
Lossless transmission is carried out in the form of total reflection and reaches light wave coupling-out face 12, light wave is destroyed in substrate using prismatic reflection face
The total reflection condition of middle transmission, light wave is coupled out substrate, reach light wave expansion module 13, the light wave of coupling output is entered
Row expands, so as to realize increase visual field.
The present invention is used for a kind of optical waveguide display device for folding extension and is made up of four parts, can for specific application
The part of waveguide device of the present invention is extended accordingly, so as to the application potential of further lifting system.Pin below
Respective explanations explanation is given in specific tetrameric effect to the present invention：
The light wave coupling-in face 10 that the present invention folds expansion optical waveguide device is mainly used in coupling the collimated light waves in the external world
Into substrate.Coupling for optical signal, input face 10 can be replaced by modes such as prisms, and these components can meet need
The light wave wanted is coupled in substrate.
The light wave extension transferring substrate 11 that the present invention folds expansion optical waveguide device is mainly used in will be coupled into lining
The visual field of light wave in bottom is enlarged, and in order to ensure that light wave can transmit without loss, light wave should be made to transmit in the substrate
When, meet the condition being totally reflected.In addition.Due to the presence of light wave extension transferring substrate, in the certain extended corner of the opposite side of substrate
Image information can be observed at different direction of observations in degree, so as to expand the visual field of observer.
The present invention fold expansion optical waveguide device light wave coupling-out face 12 be mainly used in coupling lightwave signal it is defeated
Go out substrate.When being transmitted in the substrate due to light wave meet total reflection condition, in order to make light wave coupling output substrate, it is necessary to
Light wave is set to be less than the cirtical angle of total reflection of substrate in the incidence angle of substrate surface, so coupling-out face 12 is exactly according to this condition
It is designed.
The light wave expansion module 13 of present invention folding expansion optical waveguide device is mainly used in the light to coupling output substrate
Ripple is expanded, so as to expand observation visual field.The light of coupling output substrate 11, has been resulted in directly because its angle of divergence is larger
Visual field when observing output image is too small, therefore needs introducing to expand component and the light wave of coupling output is deployed, so as to expand
Observe visual field.The light wave expansion module 13 of the present invention is made up of prism unit, and the light wave for coupling output is extended by prism group,
Each prism is set individually to export a part for optical signal, its effect is equal to mirror imaging, is regarded so as to expand observation on the whole
.
The job step and exemplary application of optical waveguide device of the present invention：
Fig. 2 is the schematic diagram that the present invention is used for that light wave to transmit in the substrate in a kind of optical waveguide display device for folding extension.
As shown in Fig. 2 the light 20,21 from the same light wave of light source is impinged perpendicularly on coupling-in face, by the reflection of input face
Light wave is coupled into extension transferring substrate, is propagated in the form of total reflection, reaches coupling-out face, and then anti-
Project outside substrate.In order that light wave disclosure satisfy that the condition of total reflection in the substrate, substrate should by it is a series of can be to light
The folding and expanding component that the direction of propagation is accurately positioned is formed., on the one hand can be to light by the propagation of the process light wave
The direction of propagation be extended, play a part of field expander, on the other hand can be effectively prevented from due to the light direction of propagation
The ghost effect brought of change.
Fig. 3 is that the present invention is transmitted for light wave in a kind of optical waveguide display device for folding extension in expansion module
Schematic diagram.As shown in Figure 3A, the vertical output substrate after the reflection of coupling-out face of light 30 enters light wave extension element
In.It is first because the light wave extension element is made up of a series of prism beam expander unit, therefore after light 30 enters extension element
First collided with prism unit surface 32, in order to reach the purpose of extended field of view, light should be all saturating as much as possible after reaching face 32
It is shot out, so on the one hand can avoids that, due to ghost image caused by the change of the light direction of propagation, expansion on the other hand can also be made
The brightness for opening up each surface of prism keeps homogeneous.Fig. 3 B are that light 31 enters light wave by the reflection rear-inclined of coupling-out face
In extension element, when Ray obliquity incides prism unit surface 32, in order to extend light wave and avoid because reflecting surface is to entering
The ghost image that the zone of reflections of light comes is penetrated, so as to do prism surface specific processing, makes there is the light for inciding its surface
Passivation, so as to so that incident ray unhinderedly passes through reflecting surface, so as to be extended to incident light wave.
Fig. 4 is that the present invention is used for a kind of a kind of application example for the optical waveguide display device for folding extension.Due to this hair
Bright folding expansion optical waveguide device can be used for illuminating, be imaged and 3D projections etc., with reference to specific application example
To explain the being further described property of operation principle of the present invention：The light 47,48 of same light wave from light source 40 passes through
The collimation of collimation lens 41 is crossed, incides coupling-in face 42, can be with because light 47,48 is by the collimation of collimation lens
Coupling-in face is entered well.By the reflection of coupling-in face 12, light 47,48, which is coupled, is input to extension transmission
In substrate 43, while when should ensure that light 47,48 is propagated in the substrate, it have to be larger than with the angle of substrate upper and lower surface normal
The cirtical angle of total reflection of material, the significantly loss of energy can be caused due to reflecting when otherwise light transmits in the substrate,
It is too small to ultimately result in the energy of coupling output substrate, reduces the brightness of image.The light for being coupled into substrate passes through the biography of substrate
Defeated to eventually arrive on coupling-out face 44, now the angle of light and output surface normal has been less than the cirtical angle of total reflection of material,
So as to break the total reflection condition of light wave, light wave is set to incide in extension prism assemblies.Prism assemblies to light due to can have
There is selective penetrated property, in the case where keeping radiation direction constant, each prism can be individually imaged, so that light wave is in rib
It is uniformly distributed in mirror assembly.Transmitted by extension of the prism assemblies to light, final light is entered in human eye 46.Due to people
Eye pupil bore dia is about 2-8mm, therefore human eye is able to observe that the image of whole light source.For different applications, prism is extended
The quantity of component can do corresponding design, but allow for the image of display light source being fully deployed, and otherwise will lose visual field
The effect of extension.
The effect of the present embodiment and effect
What the present embodiment provided is used in a kind of optical waveguide display device for folding extension as a result of extension transferring substrate,
On the one hand the direction of propagation of light can be extended, plays a part of field expander, on the other hand can be effectively prevented from
The ghost effect brought due to the change of the light direction of propagation.Additionally, due to the presence of light wave expansion module so that expansion module
In each prism unit can individually be imaged so that light wave can be uniformly distributed, improve the brightness uniformity of image
Property, and prism assemblies can be extended transmission to light, so as to further expand visual field.
Claims (2)
1. a kind of optical waveguide display device for folding extension, includes successively：
Light wave coupling-in face, for changing the direction of external optical signals, make it into substrate；
Light wave extends transferring substrate, and the light wave of coupling input reflect propagation and can be transferred to without loss reaching output
Position；
Light wave coupling-out face, for making light wave coupling output substrate；
Light wave expansion module, the light wave of coupling output is expanded, so as to expand visual field,
Wherein, light wave coupling-in face connects with light wave extension transferring substrate respectively with light wave coupling-out face, is served as a contrast positioned at transmission
The both ends at bottom, the lower surface that light wave expansion module couples output substrate with light wave are connected, and the position of output is coupled in substrate
Put place.
2. optics according to claim 1, it is characterised in that：Light wave expansion module is by a series of prism unit group
Into the surface of these prism units carries out transpassivation processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710989755.2A CN107664844A (en) | 2017-10-23 | 2017-10-23 | A kind of optical waveguide display device for folding extension |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710989755.2A CN107664844A (en) | 2017-10-23 | 2017-10-23 | A kind of optical waveguide display device for folding extension |
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| Publication Number | Publication Date |
|---|---|
| CN107664844A true CN107664844A (en) | 2018-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710989755.2A Pending CN107664844A (en) | 2017-10-23 | 2017-10-23 | A kind of optical waveguide display device for folding extension |
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| CN (1) | CN107664844A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113785557A (en) * | 2019-05-03 | 2021-12-10 | 奥迪股份公司 | Camera arrangement for generating an image of a surrounding environment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104536137A (en) * | 2015-01-25 | 2015-04-22 | 上海理湃光晶技术有限公司 | Folding expanding optical waveguide device for image display |
-
2017
- 2017-10-23 CN CN201710989755.2A patent/CN107664844A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104536137A (en) * | 2015-01-25 | 2015-04-22 | 上海理湃光晶技术有限公司 | Folding expanding optical waveguide device for image display |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113785557A (en) * | 2019-05-03 | 2021-12-10 | 奥迪股份公司 | Camera arrangement for generating an image of a surrounding environment |
| CN113785557B (en) * | 2019-05-03 | 2023-08-01 | 奥迪股份公司 | Camera device for generating an image of an ambient environment |
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Application publication date: 20180206 |