CN109725428A - A kind of light field display methods and light field display engine - Google Patents
A kind of light field display methods and light field display engine Download PDFInfo
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- CN109725428A CN109725428A CN201910139676.1A CN201910139676A CN109725428A CN 109725428 A CN109725428 A CN 109725428A CN 201910139676 A CN201910139676 A CN 201910139676A CN 109725428 A CN109725428 A CN 109725428A
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- galvanometer
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- dimensional image
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Abstract
The present invention relates to display fields, more particularly to a kind of light field display methods and light field display engine, projector successively projects the two-dimensional image information sequence within the scope of specified view angle according to timing, the two-dimensional image information sequence is projected in the space of corresponding angular field of view by vibration mirror reflected and scanning, the reflection angle of the galvanometer and the visual angle of two dimensional image correspond, when vibration mirror scanning is to specified angle position, projector is synchronous to project two-dimensional image information corresponding with the angled-view；Controller control galvanometer scans back and forth in the angle of setting, while coordinating the timing of projector, the two-dimensional image information of angular field of view is corresponded to according to the angle synchronized projection of vibration mirror scanning, to form 3-D image in space.Light field display methods of the invention can get high-resolution, the big depth of field, big visual angle 3-D image, and safety coefficient is high, and system bulk is small, and calibration is convenient.
Description
Technical field
The present invention relates to display fields, and in particular to a kind of light field display methods and light field display engine.
Background technique
It is different from three-dimensional film and stereo TV technique currently on the market, light field display technology can reconstruct in space
The three-dimensional information of object can provide close to natural stereo-picture, apparent visual fatigue problem is not present, and be one kind true three
Tie up display technology.Relative to holography, auxiliary calculation amount required for light field is shown is small, and shines without coherent light
It is bright, so being considered as a kind of dimension display technologies of great prospect.Current light field display technology mainly includes stacking light field
Display, projected array light field is shown, integration imaging light field is shown and dynamic light field is shown.These light field display technologies have respectively
Advantage, but there is also deficiencies.So all not can enter mainstream market.
Stacking light field is shown based on four-dimensional light field principle, using the spatial light field of multiple display layer building three-dimensional scenics, is led to
The pixel crossed on multiple display planes determines the direction of light and colouring information in scene.Pixel in each plane
Luminance information is optimized by iterative method according to the brightness and spatial information of three-dimensional scenic and is obtained.This display technology
3-D effect by display the number of plies restriction.Show that the more three-dimensional depth of field of the number of plies and resolution ratio are higher, but with display layer
Increase, brightness of image will also decline to a great extent rapid decay, picture contrast.
Projected array light field display technology is projected the light field image of different angle by diffuser screen using array of rear-projectors
On the large screen of composition, light field image information is exported using lens array from the angle of setting then, forms three in space
Tie up image.The three-dimensional information of larger area, high-resolution can be obtained using this technology, but this system structure is huge
Greatly, the calibration between array is complicated, is unfavorable for integrating.
Integration imaging light field display technology replaces the light field figure of array of rear-projectors display different angle using flat-panel monitor
Then light field image information is exported using lens array from the angle of setting, forms 3-D image in space by picture.This skill
The structure of art is simply easily integrated, but its resolution ratio, visual angle and the depth of field by flat-panel monitor resolution ratio and lens array at
The limitation of image quality amount.
Dynamic light field display technology projects the field information of different directions using high speed projector and the optical screen of rotation,
By visual persistence effect, observer is allowed to see a three-dimensional space picture near screen.The three-dimensional figure of this system
As being shown on high-speed rotating optical screen, 3-D image can not be probeed into, and be unfavorable for interacting, and system is huge, and structure is not
Stablize, there is also certain risk for the large screen of high-speed motion.
Summary of the invention
In view of this, the purpose of the present invention is overcoming the disadvantage in background technique, a kind of high safety factor, high-resolution are provided
Rate, the light field display methods of the big depth of field and light field display engine.
The purpose of the present invention is what is be achieved through the following technical solutions: a kind of light field display methods, this method comprises: projection
Instrument successively projects the two-dimensional image information sequence within the scope of specified view angle according to timing, and the two-dimensional image information sequence passes through vibration
Mirror reflection and scanning project in the space of corresponding angular field of view, and the visual angle of the reflection angle of the galvanometer and two dimensional image is one by one
It is corresponding, when vibration mirror scanning arrives specified angle position, the synchronous projection of projector two-dimensional image information corresponding with the angled-view；
Controller control galvanometer scans back and forth in the angle of setting, while coordinating the timing of projector, according to the angle of vibration mirror scanning
Position synchronized projection corresponds to the two-dimensional image information of angular field of view, to form 3-D image in space.
A kind of light field display engine, the system include: projector, galvanometer and controller, and the controller connects projector
With the control circuit of galvanometer；Projector successively projects two-dimensional image information sequence to galvanometer according to timing, and galvanometer will by scanning
Two-dimensional image information sequence is reflected into the space of specified view angle range, and the two-dimensional image sequence coding has specified view angle range
The perspective information of interior 3-D image, the reflection angle of the galvanometer and the visual angle of two dimensional image correspond, and work as vibration mirror scanning
When to specified angle position, projector is synchronous to project two-dimensional image information corresponding with the angled-view；The controller control
Galvanometer scans back and forth in the angular range of setting, while coordinating the projection timing of projector, synchronous according to vibration mirror scanning angle
Two-dimensional image information is projected, to form 3-D image in space.
Further, the 3-D image of the light field display engine output can be received with screen, can also not have to screen
Stereo-picture is directly formed in three dimensions.
Further, the two dimensional image of the projector projects is kept clear in the depth of field that 3-D image occupies.
As a preferred embodiment, the galvanometer is 2-D vibration mirror, is scanned in the two orthogonal directions X and Y.
Specifically, the 2-D vibration mirror is to be composed of the independent galvanometer galvanometer of bidimensional or the vibration of two-dimentional MEMS
Mirror.
As another preferred embodiment, the galvanometer is one-dimensional galvanometer, is scanned in one direction.
Preferably, three-dimensional figure is preferably received by scattering screen in the field information that one-dimensional galvanometer scans formation in one direction
Picture.
It is further preferable that the scattering screen is asymmetric scattering screen.
The beneficial effects of the present invention are:
(1) a kind of new light field display methods is proposed, is made with effectively preventing high speed rotation screen using vibration mirror scanning
With improving the safety of display system, and greatly reduce the volume of system, simplify light field display methods.
(2) a kind of new light field display system is proposed, avoids field information complicated in conventional light field display system fixed
Mark and correcting process.
(3) a kind of new light field display system is proposed, breaches lens array and display screen etc. using scanning galvanometer
The limitation of optical device, realize high-resolution, the big depth of field, big visual angle 3-D image.
Detailed description of the invention
Fig. 1 is the light field display engine structural schematic diagram of embodiment 1；
Fig. 2 is the light field display engine structural schematic diagram of embodiment 2；
Fig. 3 is the light field display engine structural schematic diagram of embodiment 3；
Fig. 4 is that the light of Fig. 3 penetrates the partial structural diagram of screen.
Wherein, 1, projector；2, galvanometer；2-1, X-axis galvanometer；2-2, Y-axis galvanometer；3- controller；4- 3-D image；5- pairs
Claim scattering screen；The asymmetric scattering screen of 6-.
Specific embodiment
Embodiment 1
The present embodiment provides a kind of light field display methods and light field display engine,
As shown in Figure 1.A kind of light field display engine, including projector 1, galvanometer 2 and controller 3, the controller 3 connect
The control circuit of projector 1 and galvanometer 2.The galvanometer 2 is two-dimentional MEMS (MEMS) galvanometer, can be along such as Fig. 1 institute
The two orthogonal directions X and Y shown scan back and forth.The reflection light of the projector 1 can separately exist around X and Y-axis
Continuous scanning within the scope of angle, θ and Φ.The projector 1 successively projects two-dimensional image information sequence, institute to galvanometer 2 according to timing
The perspective information that two-dimensional image sequence coding has the 3-D image within the scope of specified view angle is stated, galvanometer 2 passes through two-dimensional scanning for two
Dimension image information sequence is reflected into the space of specified view angle range, reflection angle and the record two dimensional image of the galvanometer 2
Visual angle corresponds, when specified angle position is arrived in the scanning of galvanometer 2, the synchronous projection corresponding with the angled-view two of projector 1
Tie up image information.The controller 3 controls galvanometer 2 and scans back and forth in the angle of setting, while when coordinating the projection of projector 1
Sequence, according to the scanning angle synchronized projection two-dimensional image information sequence of galvanometer 2, to form 3-D image 4 in space.
Light field display methods shows that display methods is explained in the above light field display engine by above-mentioned light field display engine
It states, details are not described herein.
Embodiment 2
The present embodiment provides a kind of light field display methods and light field display engine, as shown in Figure 2.A kind of light field, which is shown, draws
It holds up, including projector 1, galvanometer 2, controller 3, symmetrical scattering screen 5；The galvanometer 2 is by the independent galvanometer galvanometer group of bidimensional
It closes, the galvanometer galvanometer of one of dimension is scanned around X-axis, and as X-axis galvanometer 2-1, scanning angle will be θ；It is another
Dimension galvanometer galvanometer is around Y axis scanning, as Y-axis galvanometer 2-2, scanning angle Φ.The controller 3 connects projector 1
With the control circuit of galvanometer 2.The projector 1 successively projects two-dimensional image information sequence, the two dimension to galvanometer 2 according to timing
Image information sequential coding has the perspective information of the 3-D image within the scope of specified view angle, and galvanometer 2 will be two-dimentional by two-dimensional scanning
Image information sequence is reflected into the space of specified view angle range, the reflection angle of the galvanometer 2 and the view of record two dimensional image
Angle corresponds, and when specified angle position is arrived in the scanning of galvanometer 2, projector 1 is synchronous to project the two of visual angle corresponding with the angle
Tie up image information.The controller 3 controls galvanometer 2 and scans back and forth in the angle of setting, while coordinating the timing of projector, root
According to 2 scanning angle synchronized projection two-dimensional image information sequence of galvanometer, to form three in the space near symmetrically scattering screen 5
Tie up image 4.
Embodiment 3
The present embodiment provides a kind of light field display methods and light field display engine, as shown in Figure 3, Figure 4.A kind of light field is shown
Engine, including projector 1, one-dimensional galvanometer, controller 3 and asymmetric scattering screen 6.The one-dimensional galvanometer is around Y axis scanning
One-dimensional galvanometer galvanometer, i.e. Y-axis galvanometer 2-2, scanning angle Φ.The controller 3 connects projector 1 and Y-axis galvanometer 2-2
Control circuit.Specifically, in this implementation, the asymmetric scattering screen 6 has asymmetric scattering properties, as shown in figure 4, thoroughly
Cross it is asymmetric scattering screen 6 light 7 along it is asymmetric scattering screen 6 y-axis direction occur angle spread, and along
Low-angle diffusion occurs for the x-axis direction of asymmetric scattering screen 6, forms light diffusion zone 8.The projector 1 is according to timing
Two-dimensional image information sequence is successively projected to Y-axis galvanometer 2-2, the two-dimensional image sequence coding there are three within the scope of specified view angle
The perspective information of image is tieed up, two-dimensional image information sequence is reflected into specified view angle range by one-dimensional scanning by Y-axis galvanometer 2-2
In space, the reflection angle of the Y-axis galvanometer 2-2 and the visual angle of record two dimensional image are corresponded, when Y-axis galvanometer 2-2 is scanned
When to specified angle position, projector 1 is synchronous to project two-dimensional image information corresponding with the angle.The controller 3 controls Y-axis
Galvanometer 2-2 is scanned back and forth in the angle of setting, while coordinating the timing of projector 1, same according to Y-axis galvanometer 2-2 scanning angle
Step projection two-dimensional image information sequence forms 3-D image 4 in the space near asymmetric scattering screen 6.
Claims (10)
1. a kind of light field display methods, which is characterized in that projector successively projects the two dimension within the scope of specified view angle according to timing
Image information sequence, the two-dimensional image information sequence project the space of corresponding angular field of view by vibration mirror reflected and scanning
In, the visual angle of the reflection angle of the galvanometer and two dimensional image corresponds, and when vibration mirror scanning arrives specified angle position, projects
Instrument is synchronous to project two-dimensional image information corresponding with the angled-view；Controller control galvanometer carrys out flyback in the angle of setting
It retouches, while coordinating the timing of projector, the two dimensional image of angular field of view is corresponded to according to the angle position synchronized projection of vibration mirror scanning
Information, to form 3-D image in space.
2. a kind of light field display methods according to claim 1, which is characterized in that the galvanometer is 2-D vibration mirror, in X and
The two orthogonal directions Y are scanned.
3. a kind of light field display methods according to claim 1, which is characterized in that the galvanometer is one-dimensional galvanometer, one
A direction is scanned, and corresponds to the two-dimensional image information of angular field of view in scattering according to the angle position synchronized projection of vibration mirror scanning
On screen, to form 3-D image in the space near scattering screen.
4. a kind of light field display engine characterized by comprising projector, galvanometer and controller, the controller connection projection
The control circuit of instrument and galvanometer；Projector successively projects two-dimensional image information sequence to galvanometer according to timing, and galvanometer passes through scanning
Two-dimensional image information sequence is reflected into the space of specified view angle range, the two-dimensional image sequence coding has specified view angle model
The perspective information of 3-D image in enclosing, the reflection angle of the galvanometer and the visual angle of two dimensional image correspond, when galvanometer is swept
When retouching specified angle position, projector is synchronous to project two-dimensional image information corresponding with the angled-view；The controller control
Damping mirror scans back and forth in the angular range of setting, while coordinating the projection timing of projector, according to vibration mirror scanning angle
Position synchronized projection corresponds to the two-dimensional image information of angular field of view, to form 3-D image in space.
5. a kind of light field display engine according to claim 4, which is characterized in that the three of the light field display engine output
Dimension image is received with screen or the 3-D image of light field display engine output directly forms 3-D image in three dimensions.
6. a kind of light field display engine according to claim 4 or 5, which is characterized in that the galvanometer is 2-D vibration mirror,
The two orthogonal directions X and Y are scanned.
7. a kind of light field display engine according to claim 6, which is characterized in that the 2-D vibration mirror is by bidimensional independence
Galvanometer galvanometer be composed or two-dimentional MEMS galvanometer.
8. a kind of light field display engine according to claim 4, which is characterized in that the galvanometer is one-dimensional galvanometer, one
A direction is scanned.
9. a kind of light field display engine according to claim 8, which is characterized in that the one-dimensional galvanometer is swept in one direction
It retouches, the two-dimensional image information of synchronized projection is received by scattering screen, and forms 3-D image in the space scattered near screen.
10. a kind of light field display engine according to claim 9, which is characterized in that the scattering screen is asymmetric dissipates
Penetrate screen.
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Cited By (1)
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| CN110109260A (en) * | 2019-05-30 | 2019-08-09 | 京东方科技集团股份有限公司 | Light field display system and light field display methods |
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