CN109991746A - Image source mould group and near-eye display system - Google Patents
Image source mould group and near-eye display system Download PDFInfo
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- CN109991746A CN109991746A CN201910175322.2A CN201910175322A CN109991746A CN 109991746 A CN109991746 A CN 109991746A CN 201910175322 A CN201910175322 A CN 201910175322A CN 109991746 A CN109991746 A CN 109991746A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/103—Scanning systems having movable or deformable optical fibres, light guides or waveguides as scanning elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
Abstract
The embodiment of the present application discloses image source mould group and near-eye display system.Movable modulator changes the object distance between lens, so that image light after lens imaging adjustable and pixel quantity is constant, imaging definition is high, display effect is good, simultaneously, movable modulator can move on the direction perpendicular to optical path, to change the position of imaging, show the adjusting in scene to image size, position in nearly eye to realize.
Description
Technical field
This application involves laser scanning display technical fields, and in particular to image source mould group and near-eye display system.
Background technique
Nowadays, with augmented reality (Augmented Reality, AR), virtual reality (Virtual Reality,
The nearly eye of the fast development of display technologies such as VR), such as head-mounted display (Head-Mounted Display, HMD) etc. is shown
Equipment also becomes the hot spot of display industry.
Existing near-eye display device can realize that the image of larger field is shown, user can watch biggish image
Region, picture material abundant, to obtain good display effect.But in application scenes, it may be necessary to which nearly eye is aobvious
Show that equipment adjusts the size of shown image-region, to meet the needs of users.
Summary of the invention
The application's is designed to provide a kind of image source mould group and near-eye display system, for solving in nearly eye is shown
The problem of image adjustment.
The embodiment of the present application provides a kind of image source mould group, comprising: image data unit, movable modulator and lens,
Wherein,
The light source generates light output to the movable modulator；
Described image data cell is connected with the movable modulator, to provide to the movable modulator to aobvious
The image data of diagram picture；
The movable modulator is modulated the light of the light source output, obtains image according to described image data
Light is simultaneously exported to the lens, is input to external optical element through the lens；Also, the movable modulator is according to control
Signal is moved, and change is described, and movable modulator itself is at a distance from the lens and described image light action is described
The position of lens, to adjust image size and picture position corresponding after lens described in image light penetration.
Further, the lens are zoom lens；The external optical element includes: waveguide.
Further, when the movable modulator is mobile, described image light is corresponding after the zoom lens
Image planes position it is constant.
Further, the field angle for the picture that the movable modulator generates is less than or equal to the corresponding maximum of the waveguide
Field angle.
Further, the movable modulator includes modulator and the driving portion that is fixedly connected with the modulator,
The modulator moves under driving portion drive；
Wherein, the modulator includes: the modulator of reflective modulator or transmission-type.
Further, the driving portion is the arm-type driving structure of multi-jointed mechanical.
Into a ground, the arm-type driving structure of multi-jointed mechanical includes: rotary head, first mechanical arm, second mechanical arm,
Wherein, one end of the first mechanical arm is connected with the rotation section of the rotary head, the other end of the first mechanical arm with
Described second mechanical arm one end connects in a rotatable manner, and the end of the second mechanical arm is fixedly connected with the modulator；
Under the drive of the rotary head rotation section, the first mechanical arm and the second mechanical arm, the modulation
The position of device is adjustable.
Further, the modulator is reflective modulator, the end of mechanical arm in the multi-jointed mechanical arm driving structure
End is fixedly connected on the opposite one side of the modulator target surface.
Further, the modulator is transmission-type modulator, the end of mechanical arm in the multi-jointed mechanical arm driving structure
End is fixedly connected on the modulator perpendicular to the side by light direction.
Further, the driving portion is three-D displacement platform.
Further, the modulator is reflective modulator, the surface opposite with target surface on the reflective modulator
It is fixedly connected on the three-D displacement platform.
Further, the modulator is transmission-type modulator, vertical with by light direction on the reflective modulator
One surface is fixedly connected on the three-D displacement platform.
Further, when the modulator is reflective modulator, in the mould group of described image source further include: polarization spectro
Device deflects to the light of the light source output on the modulator, and the image light after the modulators modulate is transmitted through
In the lens.
Further, the target surface area of the reflective modulator is less than the target of the polarization beam-splitting unit incident image light
Face area.
Further, in described image source mould group further include: control unit generates control letter according to external control instruction
Number and be sent to the movable modulator.More specifically, driving portion hair of the control unit into the movable modulator
Send control signal.
The embodiment of the present application also provides another image source mould group, comprising: light source, image data unit, movable modulation
Device, the first lens, displacement platform and the second lens, wherein
The light source generates light output to the movable modulator；
Described image data cell is connected with the movable modulator, to provide to the movable modulator to aobvious
The image data of diagram picture；
The movable modulator is modulated the light of the light source output according to described image data, generates image
Light simultaneously exports, sequentially to penetrate first lens and the second lens；Also, the movable modulator according to control signal into
Row movement changes the movable modulator itself at a distance from first lens and described image light action is described the
The position of one lens；
The displacement platform drives the movable modulator and first lens mobile relative to second lens；
Second lens are set on the emitting light path of first lens, the image light warp being emitted from first lens
It crosses second lens and is input to external optical element.
The embodiment of the present application also provides a kind of image source mould group, comprising: image source, bundling device, movable fibre optic scanner
And zoom lens, wherein
Described image source generates multi beam image beam and exports to bundling device；
The multi beam image beam that the bundling device exports described image source close after beam by optical fiber output to it is described can position
Move scanner；
Image beam after the movable fibre optic scanner pairing beam carries out two-dimensional scanning output, scans the image of output
Light beam is input to external optical element through the zoom lens；Also, the movable fibre optic scanner according to control signal into
Row movement, change is described, and movable fibre optic scanner itself is at a distance from the zoom lens and described image light action is in institute
The position of zoom lens is stated, to adjust image size and picture position corresponding after zoom lens described in image light penetration.
The embodiment of the present application also provides another image source mould group, comprising: image source, bundling device, movable optical fiber scanning
Device, the first lens, displacement platform and the second lens, wherein
Described image source generates multi beam image beam and exports to bundling device；
The multi beam image beam that the bundling device exports described image source close after beam by optical fiber output to it is described can position
Shifting fiber scanner；
Image beam after the movable fibre optic scanner pairing beam carries out two-dimensional scanning output, scans the image of output
Beam sequence penetrates first lens and the second lens；Also, the movable fibre optic scanner is carried out according to control signal
Mobile, change is described, and movable fibre optic scanner itself is at a distance from first lens and described image light beam acts on institute
State the position of the first lens；
The displacement platform drives the movable fibre optic scanner and first lens to move relative to second lens
It is dynamic；
Second lens are set on the emitting light path of first lens, the image light warp being emitted from first lens
It crosses second lens and is input to external optical element.
For image source mould group above-mentioned, the embodiment of the present application provides a kind of control method of image source mould group, the side
Method includes:
Light source generates light output to removable image source；
Image data unit generates image data to be shown and exports to movable modulator；
Movable modulator is modulated according to light of the image data to light source output, is obtained image light and is exported to saturating
Mirror；Also, the movable modulator is moved according to the control signal received, changes the movable modulator itself
The image light of the object distance and the movable modulator output of light output surface and lens acts on the position of lens；
While distance changes between movable modulator and lens, the lens carry out zoom.
The embodiment of the present application also provides the control method of another image source mould group, which comprises
Light source generates light output to removable image source；
Image data unit generates image data to be shown and exports to movable image source；
Movable image source is modulated according to light of the image data to light source output, is obtained image light and is exported to first
Lens；The movable modulator is moved according to the control signal received, is changed movable modulator and itself is gone out light table
Face is at a distance from the first lens and image light acts on the position of the first lens；
While distance changes between movable modulator and the first lens, displacement platform drives movable modulation and first
Lens are moved relative to the second lens together, to change the distance between second lens.
The embodiment of the present application also provides a kind of near-eye display system, including waveguide and image source mould group above-mentioned, wherein
Described image source mould group generates the light output comprising image information to the waveguide, and image source mould group is exported
The field angle of light and imaging position are adjustable；
The waveguide exports after carrying out the extension in first direction and second direction to the light that described image source mould group inputs.
Further, the waveguide includes: and is set in the waveguide to be coupled into component, widening parts and decoupling component,
Wherein,
The component that is coupled into is set to the waveguide surface；The widening parts are set to the emergent light for being coupled into component
Road and extend along the direction of the emitting light path, the extension of the light directions of the widening parts perpendicular to the widening parts
Direction；The incident side of the decoupling component is parallel with the extending direction of the widening parts opposite, and the decoupling component is in institute
It states and extends on widening parts light direction, the decoupling component goes out light towards human eye side.
Following technical effect may be implemented using the technical solution in the embodiment of the present application:
In the scheme of the application, either fibre optic scanner or modulator can carry out the movement of three-dimensional, both
Can change the object distance between lens, also can change image light and act on the position on lens, by change with lens it
Between object distance, can be realized to imaging size adjusting；And the position on lens is acted on by changing image light, it can be realized
Change the position of imaging.To realize the adjusting to image shown by near-eye display device by this method.
Especially for the scheme using movable modulator, it is different from the size for changing effective modulation areas on modulator
The mode of image adjustment is carried out, above scheme can't reduce effective modulation areas on modulator in the application, once effectively
Modulation areas reduce, also mean that pixel corresponding to modulation image light is also accordingly reduced, it is clear that, will be into imaging
One step causes image sharpness lower, the poor defect of display effect.Therefore, in the application by movable image source change with
Object distance between lens so that image light imaging is reduced after lens and pixel quantity is constant, imaging definition is high, shows
Show that effect is good, meanwhile, movable image source can move on the direction perpendicular to optical path, thus change the position of imaging,
Nearly eye is shown in scene, changes the position of imaging, can be to avoid the sight for blocking user.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1 is a kind of schematic diagram of illustrative optical system provided by the embodiments of the present application；
Fig. 2 is a kind of schematic diagram of near-eye display system provided by the embodiments of the present application；
Fig. 3 is the structural schematic diagram of image source mould group in a kind of near-eye display system provided by the embodiments of the present application；
Fig. 4 is to increase the structural schematic diagram after control unit in a kind of image source mould group provided by the embodiments of the present application；
Fig. 5 is corresponding image planes position view after movable image source provided by the embodiments of the present application is mobile；
Fig. 6 a is the structural schematic diagram of the image source mould group provided by the embodiments of the present application using reflective modulator；
Fig. 6 b is the concrete structure schematic diagram of driving portion in movable modulator provided by the embodiments of the present application；
Fig. 7 is the structural schematic diagram of the image source mould group provided by the embodiments of the present application using transmission-type modulator；
Fig. 8 a is the schematic diagram of modulator target surface size and polarizing beam splitter size provided by the embodiments of the present application；
Fig. 8 b is the schematic diagram of distance and positional relationship between modulator and lens provided by the embodiments of the present application；
Fig. 8 c is the schematic diagram relative to Fig. 8 b imaging variation；
Fig. 9 a is the structural schematic diagram of another image source mould group provided by the embodiments of the present application；
Fig. 9 b is the schematic diagram of image planes position after element movement in the image source mould group of Fig. 9 a；
Figure 10 is a kind of control method flow chart based on image source mould group provided by the embodiments of the present application；
Figure 11 is another control method flow chart based on image source mould group provided by the embodiments of the present application.
Specific embodiment
The application is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining related invention, rather than the restriction to the invention.It also should be noted that in order to
Convenient for description, part relevant to related invention is illustrated only in attached drawing.
Illustrative optical system
In order to make it easy to understand, the brief description for now providing a kind of illustrative optical system specifically can refer to Fig. 1, this is said
It is main in bright property optical system can include: image data unit 100, light source 110, modulation unit 120, waveguide 130.
When showing imaging, the light that light source 110 issues is input to modulation unit 120, meanwhile, image data unit 100 will
The data of image to display are input to modulation unit 120, and modulation unit 120 accordingly carries out the light inputted by light source 110
Modulation obtains image light, and image light is just provided with corresponding image information (e.g., resolution ratio, color, picture material etc.), image light
It is further input to waveguide 130, then expands pupil output through waveguide 130 and eventually enters into human eye, so that human eye be made to watch corresponding figure
As content.
In practical application, be also possible that in illustrative optical system shown in Fig. 1 such as bundling device, collimating mirror and/
Or the optical modules such as diaphragm, and may include the functional units such as image data receiving unit, data encoding unit, it will specifically regard real
Depending on the needs of border application, just no longer excessively repeat here.Certainly, optics is only briefly illustrated in content shown in Fig. 1
The basic structure of system in order to understand the technical solution in the embodiment of the present application, and should not be used as the restriction to the application.It is logical
For often, the illustrative optical system in Fig. 1 is regarded as being applied in near-eye display device (such as: AR equipment or VR equipment)
Basic optical system.
It should be noted that in general, by the effect of waveguide extension in above-mentioned optical system, can show larger field
Image, but in the case where certain nearly eyes show scene, user may need lesser image display area, such as: when user is using
When AR equipment, excessive picture material may interfere with the actual environment that user checks surrounding in some cases, ought especially use
Family needs to keep the good visual field to observe actual environment when walking, driving, if at this point, AR equipment is still with biggish view
Field display image, then picture material can block the sight of user, so as to lead to the appearance of security risk.
A kind of near-eye display system
For this purpose, the embodiment of the present application provides a kind of near-eye display system, as shown in Figure 2.The near-eye display system includes: figure
Image source mould group 20 and waveguide 30, wherein
Image source mould group 20 generates the image light comprising image information and is input to waveguide 30, the figure that image source mould group 20 exports
The position of the image as corresponding to light and adjustable section, the image light after overregulating are input to waveguide 30.30 pairs of waveguide figures
As the extension in light progress first direction and second direction, the image light after extension is exported from waveguide 30.With image source
The image light of 20 pairs of mould group outputs is adjusted, and phase also occurs for the position of shown image and size after extending via waveguide 30
The change answered, to realize the adjusting of image size and display area shown by near-eye display system.
It should be noted that in practical application, image source mould group 20 can carry out individual packages, thus formation and waveguide
30 mutually independent optical modules, and can be contained in near-eye display device.
As shown in Fig. 2, first direction and second direction characterize the propagation of light beam depth and lengthwise in waveguide 30 respectively
Direction, when user actually uses near-eye display device corresponding to above-mentioned near-eye display system, first direction is considered as
Vertical direction in the plane of the human eye visual field, and second direction is considered as the horizontal direction in the plane of the human eye visual field, therefore, first
Direction and second direction, and can be described as: both vertically and horizontally.Be readily appreciated that, " first " and " second " here be for
Difference, is not construed as restriction sequentially.
It should be understood that image source mould group 20 and the size of waveguide 30 shown in Fig. 2 are only a kind of examples, and it is not considered that
It is the limitation to the application, in practical applications, image source mould group 20 generallys use bigger volume, certainly, will specifically regard real
Depending on the needs of border application, here and without excessively limiting.
To further understand the application, the technical solution in the application is described in detail with different embodiments below.
Image source mould group
It is the specific structure of one of the embodiment of the present application image source mould group 20, wherein mainly with reference to Fig. 3 can include:
Image data unit 201, light source 202, movable modulator 203 and lens 204.
Image data unit 201, which is configured that, provides picture material to be shown.Image data unit 201 can will with to
The associated video of the picture material of display, picture or text information are converted to the image for being adapted for 3D, 2.5D or 2D projection
Data.Such as: when carrying out 3D Projection Display, for shown image, parts of images content therein may need
It is shown in specific depth plane, and the picture material of another part may need to be shown in another depth plane, with reality
Existing 3D display effect, then, image data unit 201 just needs to be handled for image to be shown, so that after processing
The format of image be adapted for 3D Projection Display.
May include in image data unit 201 memory, graphics processor (Graphics Processing Unit,
GPU), chip needed for central processing unit (Central Processing Unit, CPU) or other progress image procossings or
Circuit, here and without specifically limiting.
Light source 202 generates light output to the movable modulator 203.Single light emitting source, e.g., LED can be used in light source 202
Or laser, the light of capable of emitting particular color after setting.In another embodiment, light source 202 may include it is multiple spatially
Isolated sub-light source, sub-light source equally can be LED or laser, and the color of multiple sub-light sources can be the same or different,
It specifically will be depending on the needs of practical application.In certain application scenarios, light source 202 can also be via optical fiber (not in Fig. 3
Show) output light is specific here and to be not limited depending on practical application needs as which kind of mode of use.
It include modulator 2031 and driving portion 2032 in movable modulator 203, modulator 2031 is fixed on driving portion
On 2032, driving portion 2032 can carry out the movement of three-dimensional under control signal function accordingly, and then drive modulator
2031 is mobile.
In general, modulator 2031 and image data unit 201 have connection relationship, modulator 2031 can be according to image data
Unit 201 generate to the virtual content that is shown to user, processing is modulated to the light from light source 202.
In some embodiments, modulator 2031 can be used spatial light modulator (Spatial Light Modulators,
It SLM), specifically can be reflective, such as: digital light processing (Digital Light Processing, DLP) digital micro-mirror is set
Standby (Digital Micromirror Device, DMD), MEMS (Micro Electro Mechanical
System, MEMS) galvanometer or liquid crystal on silicon (Liquid Crystal On Silicon, LCOS) etc.；It is also possible to transmit
Formula, such as: LCD；It can also be emission-type, such as: OLED.
And in further embodiments, modulator 2031 may be replaced by fibre optic scanner, and correspondingly, light source 202 can
To use internal modulation light source (that is, the light from the output of light source 202 is the image light for having already passed through modulation), also, in image source mould
In group, bundling device will be increased, the multiple laser for exporting light source 202 carries out conjunction beam, passes through optical fiber output to optical fiber scanning
Device, then output is scanned by fibre optic scanner.Certainly, using which kind of structure specifically will according to the needs of practical application depending on,
Here it does not restrict.
Driving portion 2032 can be using the driving structure (subsequent to will be described in more detail) of three-D displacement platform or mechanical arm type.
Lens 204 can use zoom lens, certainly, may also use fix-focus lens in other embodiments, subsequent to incite somebody to action
It is described in detail.
In the present embodiment, aforementioned components can be packaged within shell 205, so that image source mould group 20 is only as one
Vertical optical device.Certainly, the positional relationship between each element shown in Fig. 3 is only a kind of example, is not construed as
Restriction to the application.
It should be noted that waveguide 30 is input to after lens 204 by the modulated image light of modulator 2031,
In, the change of the distance (object distance) of modulator 2031 to lens 204 will affect the imaging size after image light penetration lens 204.
In the embodiment of the present application, if lens 204 be convex lens, when object distance be greater than focal length when, object distance increase, image distance reduce, institute at
Picture reduce therewith；Object distance reduces, and image distance increases, and imaging increases with it.Therefore, movable modulator in the present embodiment
203 can realize the adjusting to imaging size by changing the distance between lens 204.Also, movable modulator 203
It can also arbitrarily be moved in the plane perpendicular to optical path, to can also change the imaging position of image light.
In practical applications, when modulator 2031 is using modulator, the mode of certain adjustment image sizes is by changing
The size for becoming effectively modulation areas on modulator further changes the size of imaging, but such mode is due to reducing on modulator
Effective modulation areas, cause generate image light corresponding to pixel also accordingly reduce, imaging when, image sharpness compared with
Low, display effect is poor.And image size is adjusted by the way of changing object distance in the application, it is ensured that modulator
Upper effective modulation areas is not reduced, that is to say, that and the pixel quantity of image will not be reduced, even if the size of image reduces,
Its clarity is also unaffected, therefore can guarantee to clearly indicate effect.
Further include control unit 206 in image source mould group 20 in one embodiment with reference to Fig. 4, control unit 206 with
Driving portion 2032 in movable modulator 203 has connection relationship, so as to according to external control instruction (usually by user
Issue) corresponding driving signal is issued to driving portion 2032, it is moved with controlling driving portion 2032.
It may include CPU and/or corresponding circuit in control unit 206, in order to installation settings in near-eye display device
In, control unit 206 can use the form of chip.In one embodiment, eye movement tracking is additionally provided in near-eye display device
Unit, then control unit 206 can also be connect with eye movement tracing unit, to control under the signal function of eye movement tracing unit
The adjusting to the size, display position of the picture material of display automatically is realized in the position of movable modulator 203.In another kind
In embodiment, near-eye display device provides picture and adjusts function, and user can actively trigger the function, for this situation, control
Unit 206 can receive the image adjustment instruction for being triggered and being generated by user, control the position of movable modulator 203, thus
Realize the adjusting of the size, display position to the picture material of display.
Control unit 206 is other than controllable said elements, and in another embodiment, control unit 206 can also be with
Also there is connection relationship between light source 202, thus control unit 206 can switch state, output light intensity to light source 202 etc. into
Row control.
In image source modular structure above-mentioned, movable modulator 203 changes the distance between lens by mobile,
The size of image can be further changed, still, as shown in figure 5, movable modulator 203 moves (Fig. 5 along the direction of light propagation
Middle dotted line frame) to will cause light beam mobile (in Fig. 5 empty also along the direction of light propagation through the position of the image planes 700 after lens 204
Line), for this situation, if be applied in near-eye display device, the image for causing user to be watched is thickened,
Also need to be implemented focus operation, it is clear that this will lead to poor usage experience.
Therefore in the present embodiment, lens 204 use zoom lens in image source mould group, as a kind of feasible mode, thoroughly
Mirror 204 equally has connection relationship with control unit 206, when the distance between movable modulator 203 and lens 204 change
When, the control signal issued by control unit 206 controls, and lens 204 accordingly change focal length, to guarantee light beam through lens
The position of image planes 700 after 204 is constant.
In addition, movable modulator 203 exports when the image source mould group in the present embodiment is applied to near-eye display system
Light beam be less than or equal to maximum field of view angle corresponding to waveguide 30 in system through the field angle of picture caused by lens 204.
With reference to Fig. 6 a, in a kind of more specifically embodiment, also comprising collimating mirror 210, polarization in image source mould group 20
Piece 220, polarizing beam splitter 230, modulator 2031 in movable modulator 203 concretely reflective modulator.In Fig. 6 a
Shown in image source mould group 20, after collimated 210 collimation of the mirror processing of the light being emitted from light source 202, pass through 220 turns of polarizing film
It is changed to the light (assuming that into S polarized light after converting) of unified polarization state, light enters polarizing beam splitter 230 later, it is assumed that polarization
The polarization selection face setting of optical splitter 230 are as follows: reflection S polarized light, and transmit the P-polarized light vertical with S polarized light.To partially
Vibration optical splitter 230 can reflex to light on (that is, on modulator) modulator 2031 of movable modulator 203.Through ovennodulation
The modulation treatment of device obtains image light (in modulated process, modulator can convert light into P-polarized light simultaneously), image light
It is input in lens 204 through polarizing beam splitter 230, and is further input to waveguide 30.
In the embodiment shown in Fig. 6 a, the driving portion 2032 in movable modulator 203 is using mechanical arm configuration, specifically
Ground, with reference to Fig. 6 b, the another side on modulator relative to light target surface is fixed in the distal end of mechanical arm 500, to realize three-dimensional side
To movement, mechanical arm 500 further includes first mechanical arm 510 and second mechanical arm 520, wherein first mechanical arm 510 1
End is fixed on the rotation section of rotary head 530, and the rotation section of rotary head 530 can drive first mechanical arm 510 to rotate.First
510 other end of mechanical arm is connect in a rotatable manner with 520 one end of second mechanical arm, distal end and the modulation of second mechanical arm 520
Device is fixedly connected.
Under the drive of rotary head 530, first mechanical arm 510 and second mechanical arm 520, modulator 2031 can be carried out
The movement of three-dimensional.
With reference to Fig. 7, in another more specifically embodiment, modulator 2031 uses transmission-type modulator, light source 202
For the light of sending as illumination after the target surface of modulator, the another side of modulator generates image light after ovennodulation.
In order not to block optical path, therefore in the embodiment shown in fig. 7, driving portion 2032 is set on modulator to hang down with the light direction of propagation
Straight side.
In above-mentioned embodiment as shown in figs. 6 and 7, the mode being fixedly connected between modulator 2031 and driving portion 2032 is equal
Can be used be adhesively fixed, the fixed forms such as buckle structure is fixed, riveting is fixed, here and be not limited.
Other than above-mentioned driving structure, in another embodiment of the application, three-D displacement platform can also be used
Structure, modulator 2031 can be fixed on the table top of three-D displacement platform, can be in three-dimensional side under the drive of three-D displacement platform
It is moved upwards.Certainly, the specific structure of three-D displacement platform belongs to the prior art, just no longer excessively repeats here.
What needs to be explained here is that when modulator 2031 is using the case where reflective modulator, it is contemplated that need to adjust
The position of imaging, modulator needs move on the direction perpendicular to optical path, but just as shown in Figure 6 a, polarizing beam splitter 230 will
The light that light source 202 exports reflexes to the target surface of modulator, if the emittance area of the target surface area of modulator and polarizing beam splitter 230
It is close, then, once modulator moves on the direction of vertical optical path, then modulator is by part beyond polarizing beam splitter 230
Light-emitting surface causes a part of modulator to be unable to light and be modulated, further such that the image light content generated after modulation
It is imperfect.
Therefore, in the embodiment of the present application, Fig. 8 a is specifically referred to, the area of the light target surface of modulator is less than polarization point
The area of the deflection light-emitting surface of light device 230, then, when modulator moves in a certain range, polarization spectro can't be exceeded
Device 230 deflection output illumination range, this guarantees modulator target surface can abundant light, so that modulator can be with maximum
Pixel density is modulated irradiation light, generates image light.Wherein, in Fig. 8 a, dotted line frame indicates that modulator is moved to a certain position
It sets.
In one embodiment, under default conditions, user can watch the figure of larger field using near-eye display device
Picture, it is assumed that the distance between movable modulator 203 and lens 204 (middle abbreviation being described below are as follows: distance) are d at this time, and root
According to actual needs, by the indication range of downscaled images, then control unit 206 can send corresponding control to movable modulator 203
Signal processed, suspension control signal act on, and the driving portion 2032 in movable modulator 203 drives modulator 2031 to far from lens
204 direction is mobile, so that the distance between modulator 2031 and lens 204 change into D, wherein D > d.According to lens at
As principle, image light will reduce by 204 imaging of lens at this time.Within the scope of a certain distance, the ratio of reduction is imaged
It is inversely proportional with distance.Certainly, the specific value of distance also with the relating to parameters such as the type of lens 204, size, here and without
Concrete restriction.
As previously mentioned, modulator 2031 may use reflective modulator, it correspondingly, will setting in image source mould group 20
Polarizing beam splitter 230, polarizing beam splitter 230 are set between movable modulator 203 and lens 204, then, in this situation
Under, movable modulator 203 carries out three-dimensional mobile, object distance and image light between change and lens 204 according to control signal
The process in the region on lens 204 is acted on, concretely: the driving portion 2032 in movable modulator 203 drives modulator
2031 is mobile to the direction far from polarizing beam splitter 230, increases by 2031 target surface of modulator and polarizing beam splitter 230 deflects light-emitting surface
The distance between, to further increase the distance between modulator 2031 and lens 204.
The schematic diagram of imaging variation specifically can be as shown in Fig. 8 b and 8c.In figure 8b, it is assumed that modulator 2031 is from position L1
(dotted line frame in Fig. 8 b) is moved to position L2, at this point, modulator 2031 increases relative to the object distance of lens 204 compared to position L1
Add, and the position change that image light is acted on, thus, with reference to Fig. 8 c, imaging i1 is changed into as i2, wherein as i2 is small
In as i1.
Image source mould group in other embodiments
Different from image source mould group above-mentioned, in other embodiments, zoom lens can not be used, in this regard, providing one
Kind image source mould group 90, with reference to Fig. 9 a, which includes: image data unit 901, light source 902, movable image
Source 903, the first lens 904, displacement platform 905, the second lens 906, encapsulating shell 907 and control unit 908.Wherein, institute in Fig. 9 a
There is connection relationship between the connecting line representation element shown, be used for transmission data, instruction etc., be merely for convenience of understanding side
Case, specific connection type, wire structures etc. will according to the needs of practical application depending on, be not construed as here to the application
Restriction.
It can about image data unit 901, light source 902, the structure of movable image source 903, connection relationship and function etc.
With reference to foregoing teachings, no longer excessively repeat herein.
First lens 904 use fix-focus lens, are set on the emitting light path of movable image source 903, movable image
Source 903 can be moved on three-dimensional, wherein movable image source 903 is changed between the first lens 904 by mobile
Distance, it can be achieved that adjusting to image size；By the mobile projected position changed between the first lens 904, it can be achieved that
Adjusting to picture position.
It but is not zoom lens by the first lens 904 in this present embodiment, from the foregoing, it will be seen that working as movable image source
903 and first the distance between lens 904 change after, position of the light beam by image planes corresponding to the first lens 904 also will hair
Raw movement, the appearance of such situation will affect the display effect of near-eye display device.
For this purpose, in the present embodiment, being additionally arranged displacement platform 905 and the second lens 906.Wherein, movable image above-mentioned
Source 903 and the first lens 904 are installed on displacement platform 905, also, movable image source 903 can carry out three on displacement platform 905
Dimension movement.Displacement platform 905 can drive movable image source 903 and the first lens 904 to be moved integrally.And the second lens 906
Non- zoom lens can be used.
With reference to Fig. 9 b, when movable image source 903 is mobile relative to the first lens 904, light beam penetrates the first lens 904
The position of generated image planes 800 can also change, at this point, displacement platform 905 drives movable image source 903 and the first lens
904 are moved integrally, so that the object distance relative to the second lens 906 remains unchanged, thus when light beam penetrates the second lens 906
Afterwards, the position of corresponding image planes 900 is constant.
Three-D displacement platform or multi-jointed mechanical arm configuration can also be used certainly using rail structure in displacement platform 905, have
Body will be depending on practical application needs.
In practical application, the image source mould group 90 in the present embodiment can be integrally packaged, and in some cases, figure
As data cell 901, light source 902, movable image source 903 and lens 904 can be packaged, and it is mounted as a whole on displacement platform
On 905, then it is packaged with the second lens 906.Certainly, it is not construed as the limitation to the application here.
Above embodiments primarily illustrate the situation of movable modulator, in practical applications, for using optical fiber scanning
The image source mould group of device, may be equally applied to the scheme in the application, can specifically refer to foregoing teachings, just no longer excessive here
It repeats.
Picture adjustment methods
For in image source mould group including the embodiment of zoom lens, corresponding picture adjustment methods can be such as Figure 10
It is shown, the method specifically includes the following steps:
Step S1001: light source generates light beam and exports to removable image source.
Step S1003: image data unit generates image information to be shown and exports to movable image source.
Step S1005: movable image source is modulated according to light beam of the image information to light source output, generates image light
And it exports to lens；When image adjustment function is triggered, movable image source is controlled by control signal and is moved, is changed
The object distance and image light of movable image source light output surface and lens act on the position of lens.
Step S1007: while distance changes between movable image source and lens, lens are controlled by control signal
Carry out zoom.
And in image source mould group include non-zoom lens (that is, including the first lens and the second lens) embodiment and
Speech, corresponding picture adjustment methods can be as shown in figure 11, the method specifically includes the following steps:
Step S1101: light source generates light beam and exports to removable image source.
Step S1103: image data unit generates image information to be shown and exports to movable image source.
Step S1105: movable image source is modulated according to light beam of the image information to light source output, generates image light
And it exports to the first lens；When image adjustment function is triggered, movable image source is controlled by control signal and is moved,
Change movable image source light output surface at a distance from the first lens and image light acts on the position of the first lens.
Step S1107: while distance changes between movable image source and the first lens, pass through control signal control
Displacement platform drives movable image source to be moved with the first lens, changes the distance relative to the second lens.
The adjusting to imaging size, imaging position may be implemented in above method, meanwhile, it also may make from described image source
The image planes position of the light beam imaging of mould group output is fixed.
Application scenarios
In some actual scenes, corresponding regulating key can be set in near-eye display device, user presses adjusting
Key, then (usually picture reduces and moves to user's field range the corresponding change of the generation of image shown by near-eye display device
Neighboring area, to avoid generate the user visual field is blocked), when user presses the regulating key again, then image restoring is
Size before adjusting.Certainly, this is only a kind of citing of simple application mode.In fact, the function that image is adjusted is also
It may be disposed in the operating system of near-eye display device, realized as a kind of software function, user can preparatory self-defining figure
As the ratio of scaling, the location of after image down, brightness, transparency after image down etc., after the completion of user setting,
If needing to reduce image (or reduction amplification) in practical applications, near-eye display device operating system can be triggered
In regulatory function (such as: car driving mode, walking mode), thus realize to image size shown by near-eye display device
It adjusts.
In practical applications, near-eye display system provided by the embodiment of the present application can be applied to such as AR equipment or VR
In the near-eye display devices such as equipment.Specifically, the near-eye display device in the embodiment of the present application includes at least a set of aforementioned interior
At least one of hold the near-eye display system and foregoing teachings can be used control mode to be controlled.
Various embodiments are described in a progressive manner in the application, same and similar part between each embodiment
It may refer to each other, each embodiment focuses on the differences from other embodiments.Especially for device, set
For standby and medium class embodiment, since it is substantially similar to the method embodiment, so being described relatively simple, related place ginseng
The part explanation for seeing embodiment of the method, just no longer repeats one by one here.
So far, the specific embodiment of this theme is described.Other embodiments are in the appended claims
In range.In some cases, the movement recorded in detail in the claims can execute and still in a different order
Desired result may be implemented.In addition, process depicted in the drawing not necessarily requires the particular order shown or continuous suitable
Sequence, to realize desired result.In some embodiments, multitasking and parallel processing can be advantageous.
Statement " first ", " second " used in various embodiments of the present disclosure, " first " or " described the
Two " can modify various parts and unrelated with sequence and/or importance, but these statements do not limit corresponding component.The above statement
It is only configured to the purpose for distinguishing element and other elements.For example, the first user equipment and second user equipment indicate different
User equipment, although being both user equipment.For example, first element can under the premise of without departing substantially from the scope of the present disclosure
Referred to as second element, similarly, second element can be referred to as first element.
When an element (for example, first element) referred to as " (operationally or can with another element (for example, second element)
Communicatedly) connection " or " (operationally or communicably) being attached to " another element (for example, second element) or " being connected to " are another
When one element (for example, second element), it is thus understood that an element is connected directly to another element or an element
Another element is indirectly connected to via another element (for example, third element).On the contrary, it is appreciated that when element (for example,
First element) it referred to as " is directly connected to " or when " directly connection " to another element (second element), then without element (for example, the
Three elements) it is inserted between the two.
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art
Member is it should be appreciated that invention scope involved in the application, however it is not limited to technology made of the specific combination of above-mentioned technical characteristic
Scheme, while should also cover in the case where not departing from foregoing invention design, it is carried out by above-mentioned technical characteristic or its equivalent feature
Any combination and the other technical solutions formed.Such as features described above has similar function with (but being not limited to) disclosed herein
Can technical characteristic replaced mutually and the technical solution that is formed.
Claims (15)
1. a kind of image source mould group characterized by comprising light source, image data unit, movable modulator and lens,
In,
The light source generates light output to the movable modulator；
Described image data cell is connected with the movable modulator, to provide figure to be shown to the movable modulator
The image data of picture；
The movable modulator is modulated the light of the light source output according to described image data, obtains image light simultaneously
Output is input to external optical element through the lens to the lens；Also, the movable modulator is according to control signal
It is moved, change is described, and movable modulator itself is at a distance from the lens and described image light action is in the lens
Position, to adjust image size and picture position corresponding after lens described in image light penetration.
2. image source mould group as described in claim 1, which is characterized in that the lens are zoom lens；
The external optical element includes: waveguide.
3. image source mould group as claimed in claim 2, which is characterized in that when the movable modulator is mobile, the figure
As the position of light image planes corresponding after the zoom lens is constant.
4. image source mould group as claimed in claim 3, which is characterized in that the field angle for the picture that the movable modulator generates
Maximum field of view angle corresponding less than or equal to the waveguide.
5. image source mould group as claimed in claim 2, which is characterized in that the movable modulator include modulator and with
The driving portion that the modulator is fixedly connected, the modulator move under driving portion drive；
Wherein, the modulator includes: the modulator of reflective modulator or transmission-type.
6. image source mould group as claimed in claim 5, which is characterized in that the driving portion is the arm-type driving knot of multi-jointed mechanical
Structure.
7. image source mould group as claimed in claim 6, which is characterized in that when the modulator is reflective modulator,
The end of mechanical arm is fixedly connected on the opposite one side of the modulator target surface in the multi-jointed mechanical arm driving structure；
The end of mechanical arm is fixed when the modulator is the modulator of transmission-type, in the multi-jointed mechanical arm driving structure connects
It is connected on the modulator perpendicular to the side by light direction.
8. image source mould group as claimed in claim 5, which is characterized in that the driving portion is three-D displacement platform.
9. image source mould group as claimed in claim 8, which is characterized in that when the modulator is reflective modulator,
The surface opposite with target surface is fixedly connected on the three-D displacement platform on the reflective modulator；
It is fixed when on the modulator that the modulator is transmission-type, the transmission-type modulator with by the vertical surface of light direction
It is connected on the three-D displacement platform.
10. the image source mould group as described in claim 7 or 9, which is characterized in that when the modulator is reflective modulator
When, in the mould group of described image source further include: the light of the light source output is deflected to the modulator target surface by polarizing beam splitter
On, and the image light by the modulators modulate and after reflecting is transmitted through in the lens；
The target surface area of the reflective modulator is less than the target surface area of the polarization beam-splitting unit incident image light.
11. image source mould group as described in claim 1, which is characterized in that in the mould group of described image source further include: control is single
Member generates control signal and is sent to the movable modulator according to external control instruction.
12. a kind of image source mould group characterized by comprising light source, image data unit, movable modulator, first are thoroughly
Mirror, displacement platform and the second lens, wherein
The light source generates light output to the movable modulator；
Described image data cell is connected with the movable modulator, to provide figure to be shown to the movable modulator
The image data of picture；
The movable modulator is modulated the light of the light source output according to described image data, and it is defeated to generate image light
Out, first lens and the second lens are sequentially penetrated；Also, the movable modulator is moved according to control signal,
Change the movable modulator itself at a distance from first lens and described image light action is in first lens
Position；
The displacement platform drives the movable modulator and first lens mobile relative to second lens；
Second lens are set on the emitting light path of first lens, and the image light being emitted from first lens passes through institute
It states the second lens and is input to external optical element.
13. a kind of image source mould group characterized by comprising image source, bundling device, movable fibre optic scanner and zoom are saturating
Mirror, wherein
Described image source generates multi beam image beam and exports to bundling device；
Multi beam image beam that described image source exports is closed and movable is swept by optical fiber output to described after beam by the bundling device
Retouch device；
Image beam after the movable fibre optic scanner pairing beam carries out two-dimensional scanning output, scans the image beam of output
External optical element is input to through the zoom lens；Also, the movable fibre optic scanner is moved according to control signal
Dynamic, change is described, and movable fibre optic scanner itself is at a distance from the zoom lens and described image light action is in the change
The position of focus lens, to adjust image size and picture position corresponding after zoom lens described in image light penetration.
14. a kind of image source mould group characterized by comprising image source, bundling device, movable fibre optic scanner, first are thoroughly
Mirror, displacement platform and the second lens, wherein
Described image source generates multi beam image beam and exports to bundling device；
The multi beam image beam that the bundling device exports described image source passes through optical fiber output to the movable light after closing beam
Fine scanner；
Image beam after the movable fibre optic scanner pairing beam carries out two-dimensional scanning output, scans the image beam of output
Sequence penetrates first lens and the second lens；Also, the movable fibre optic scanner is moved according to control signal,
Change the movable fibre optic scanner itself at a distance from first lens and described image light beam acts on described
The position of one lens；
The displacement platform drives the movable fibre optic scanner and first lens mobile relative to second lens；
Second lens are set on the emitting light path of first lens, and the image light being emitted from first lens passes through institute
It states the second lens and is input to external optical element.
15. a kind of near-eye display system, which is characterized in that the near-eye display system includes: waveguide and preceding claims 1
To image source mould group described in claim any in 14.
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| CN201910175322.2A CN109991746A (en) | 2019-03-08 | 2019-03-08 | Image source mould group and near-eye display system |
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| CN201910175322.2A CN109991746A (en) | 2019-03-08 | 2019-03-08 | Image source mould group and near-eye display system |
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Application publication date: 20190709 |