CN109212871A - Projection display equipment - Google Patents
Projection display equipment Download PDFInfo
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- CN109212871A CN109212871A CN201811343006.3A CN201811343006A CN109212871A CN 109212871 A CN109212871 A CN 109212871A CN 201811343006 A CN201811343006 A CN 201811343006A CN 109212871 A CN109212871 A CN 109212871A
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- 239000000835 fiber Substances 0.000 claims description 12
- 238000013507 mapping Methods 0.000 claims description 4
- 230000000007 visual effect Effects 0.000 abstract description 5
- 230000002688 persistence Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 15
- 230000003287 optical effect Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 10
- 230000004888 barrier function Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/005—Projectors using an electronic spatial light modulator but not peculiar thereto
- G03B21/008—Projectors using an electronic spatial light modulator but not peculiar thereto using micromirror devices
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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
- G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
- G02B26/0833—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD
-
- 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
-
- 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
- G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/206—Control of light source other than position or intensity
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2066—Reflectors in illumination beam
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/208—Homogenising, shaping of the illumination light
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B35/00—Stereoscopic photography
- G03B35/18—Stereoscopic photography by simultaneous viewing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Abstract
The present invention relates to a kind of projection display equipments.The projection display equipment includes array of source mould group, diffraction beam splitting element arrays mould group, micro- vibrating mirror array, light reflecting board, regulation mould group and light-modulation panel, by the light coupling that issues array of source mould group into micro- vibrating mirror array, and multiple virtual object point projection light pencils of micro- vibrating mirror array into space are controlled, so that the multi beam light pencil projected on each virtual object point forms transmitting light beam.When user is when the light beam intersection for receiving micro- vibrating mirror array projection is seen in specific observation area, it is visually equivalent to from virtual object point to human eye and emits light beam, if the virtual object point high-velocity scanning light beam of difference into space, due to the visual persistence phenomenon of human eye, the light beam of high-velocity scanning can be identified as continuous light beam by human eye.Therefore, when multiple virtual object point high-velocity scanning light beams in from projection display equipment to space, it appears that as by virtual scene display in real space, to realize naked eye 3D display.
Description
Technical field
The present invention relates to three-dimensional stereo display technique fields, in particular to a kind of projection display equipment.
Background technique
The method that conventional three-dimensional Projection Display uses mainly has disparity barrier method, cylindrical lenses method and directive property Light Source Method.
Disparity barrier method is to be known as longitudinal paliform optical barrier of disparity barrier in screen surface setting to control light going direction,
It allows left and right two to receive different images generation parallax and reaches stereo display effect；Disparity barrier Later development is liquid crystal film, is led to
The Push And Release of light is realized in the overturning for crossing the liquid crystal molecule of liquid crystal film, is reached the identical realization effect of paliform optical barrier, is lacked
Point is that part direction light is blocked, and brightness is low, and viewing angle requires strictly, and resolution loss is serious.Cylindrical lenses method be
One elongated semicylindrical lens array is set before display screen, and the light of display pixel is by the refractions of cylindrical lens, by anaglyph
It is projected to right and left eyes respectively, the stereoscopic fusion through visual centre obtains three-dimensional sense, the disadvantage is that viewing angle is stringent, resolution loss
Seriously.Directive property Light Source Method be provided backlighting for after the pixel of LCD using the minimum linear light source of width side by side so that
The image transmission path of parity column pixel separates, so that right and left eyes see corresponding picture, the disadvantage is that viewing angle requires
Strictly.Three kinds of above-mentioned traditional three-dimensional projection display technologies are all based on binocular solid parallax principle, to the left and right by difference
Eye conveying has the 2D anaglyph of slight difference, melts picture in the brain, to generate sense of stereoscopic vision, therefore causes vision influx
Conflict, and then lead to the generation of the symptoms such as headache, dizziness, while the missing of motion parallax will lead to the lofty of vision conversion, from
And reduce the validity of visual experience.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of projection display equipment, to solve the above problems.
To achieve the above object, the invention provides the following technical scheme:
A kind of projection display equipment, comprising:
Micro- vibrating mirror array is made of multiple micro- galvanometer units；
Array of source mould group provides array in the input path of micro- vibrating mirror array for micro- vibrating mirror array
Light pencil；
Diffraction beam splitting element arrays mould group, including multiple diffraction beam splitting elements, positioned at the outgoing of the array of source mould group
In optical path, the diffraction beam splitting element there is at least two-stage effectively to spread out every beam light pencil that the array of source mould group exports
Penetrate function；
Light reflecting board is located at micro- vibrating mirror array far from the light source for the plate for being integrated with multiple micro- reflector elements
The side of array mould group, every beam light pencil for exporting the diffraction beam splitting element arrays mould group imported into micro- galvanometer
The micro- galvanometer unit of each of array；
Regulate and control mould group, for according to the spatial positional informations of the corresponding multiple virtual object points of the virtual scene to be shown and
The mapping relations of scanning information control the multiple virtual object point projection light pencils of the micro- vibrating mirror array into space, so that
Project the transmitting cone of beam that the multi beam light pencil on each virtual object point constitutes virtual object point；
Wherein, the spatial positional information include the virtual object point relative to micro- vibrating mirror array azimuth information and
Depth information, the scanning information include at least multiple micro- vibrations corresponding with each virtual object point in micro- vibrating mirror array
The scanning moment of mirror unit and scan angle；
Light-modulation panel is Pixel-level high speed spatial light modulator, is located at the light reflecting board far from micro- galvanometer battle array
The side of column, for modulating the beam energy of micro- vibrating mirror array output.
Optionally, micro- reflector element is microreflection plane mirror, and the microreflection plane mirror is embedded in the light
Reflecting plate, and there is non-zero angle between its normal direction and the normal direction of the light reflecting board or be parallel to each other.
Optionally, micro- reflector element can also be a kind of diffraction pattern, and the diffraction pattern is in the light reflecting board
Working face on.
Optionally, micro- reflector element is the holographic plate with diffraction function, and the holographic plate is in the light reflecting board
On working face.
Optionally, the diffraction beam splitting element has two-stage effective every beam light pencil that the array of source mould group exports
Diffraction function.
Optionally, the diffraction beam splitting element has three-level effective every beam light pencil that the array of source mould group exports
Diffraction function.
Optionally, the diffraction beam splitting element has level Four effective every beam light pencil that the array of source mould group exports
Diffraction function.
Optionally, the array of source mould group is made of multiple light sources unit, each light source unit include lighting source and
Light collimates combined beam unit；
The quantity for the light source unit that the array of source mould group includes and the diffraction beam splitting element arrays mould group include
The quantity of diffraction beam splitting element is equal.
Optionally, the array of source mould group includes fiber coupling light source and light beam splitting modulation unit, the fiber coupling
Light source includes the coupling collimator of the first output optical fibre of light source unit and band, and the light source unit includes lighting source and light collimation
Combined beam unit；
The light source unit output light collimates combined beam light beam, is coupled into institute by the coupling collimator with first output optical fibre
State light beam splitting modulation unit；
The output end of the smooth beam splitting modulation unit is coupled with the second output optical fibre, for the fiber coupling light source is defeated
Light beam out is divided into numerically equal with the quantity of diffraction beam splitting element that the diffraction beam splitting element arrays mould group includes
Multi beam light pencil.
Optionally, the light-modulation panel is transmission-type LCOS spatial light modulator or LCD spatial light modulator.
Projection display equipment provided by the invention includes array of source mould group, diffraction beam splitting element arrays mould group, micro- galvanometer
Array, light reflecting board, regulation mould group and light-modulation panel pass through diffraction beam splitting element arrays mould group, light reflecting board and regulation mould
The light coupling that group issues array of source mould group is into micro- vibrating mirror array, and it is multiple virtual into space to control micro- vibrating mirror array
Object point projects light pencil, so that the multi beam light pencil projected on each virtual object point forms transmitting light beam.When user is specific
Observation area when seeing the light beam intersection for receiving the projection of micro- vibrating mirror array, be visually equivalent to from virtual object point to human eye and emit light
Beam, if the virtual object point high-velocity scanning light beam of difference into space, due to the visual persistence phenomenon of human eye, human eye can be by high speed
The light beam of scanning is identified as continuous light beam.Therefore, multiple virtual object point high-velocity scanning light in projection display equipment into space
Shu Shi, it appears that as by virtual scene display in real space.To which the present invention provides a kind of new can be realized naked eye
The projection display equipment of 3D display.It is shown it is clear that 2D also may be implemented in the projection display equipment.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described.It should be appreciated that the following drawings illustrates only certain embodiments of the present invention, therefore it is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is a kind of structural schematic diagram of projection display equipment provided in an embodiment of the present invention.
Fig. 2 is a kind of structural schematic diagram of light source unit provided in an embodiment of the present invention.
Fig. 3 is a kind of structural schematic diagram of array of source mould group provided in an embodiment of the present invention.
Fig. 4 is the structural schematic diagram of one of Fig. 3 light beam splitting modulation unit.
Fig. 5 is the structural schematic diagram of another light beam splitting modulation unit in Fig. 3.
Fig. 6 is the structural schematic diagram of another projection display equipment provided in an embodiment of the present invention.
Fig. 7 is the structural schematic diagram of another projection display equipment provided in an embodiment of the present invention.
Fig. 8 is the structural schematic diagram of another projection display equipment provided in an embodiment of the present invention.
Fig. 9 is the structural schematic diagram of another projection display equipment provided in an embodiment of the present invention.
Figure 10 is the schematic illustration of space projection imaging.
Icon: 1- projection display equipment；10- array of source mould group；20- diffraction beam splitting element arrays mould group；The micro- galvanometer of 30-
Array；50- light reflecting board；70- regulates and controls mould group；90- light-modulation panel；111- lighting source；113- light collimates combined beam unit；
115- fiber coupling light source；117- light beam splitting modulation unit；1153- couples collimator；The first output optical fibre of 11531-；1171-
Second output optical fibre；11- first light source unit；12- second light source unit；21- the first diffraction beam splitting element；The second diffraction of 22-
Beam splitting element；The micro- reflector element of 51- first；The micro- reflector element of 52- second；The micro- reflector element of 53- third；The micro- reflection of 54- the 4th
Unit；The micro- reflector element of 55- the 5th；The micro- reflector element of 56- the 6th；The micro- reflector element of 57- the 7th；The micro- reflector element of 58- the 8th；
The micro- galvanometer unit of 31- first；The micro- galvanometer unit of 32- second；The micro- galvanometer unit of 33- third；The micro- galvanometer unit of 34- the 4th；35-
Five micro- galvanometer units；The micro- galvanometer unit of 36- the 6th；The micro- galvanometer unit of 37- the 7th；The micro- galvanometer unit of 38- the 8th.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.Obviously, described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.It is logical
The component for the embodiment of the present invention being often described and illustrated herein in the accompanying drawings can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.In description of the invention
In, term " first ", " second ", " third ", " the 4th " etc. are only used for distinguishing description, and should not be understood as only or imply opposite
Importance.
Fig. 1 shows a kind of structural schematic diagram of projection display equipment 1 of present pre-ferred embodiments offer.Such as Fig. 1 institute
Show, the projection display equipment 1 is anti-including array of source mould group 10, diffraction beam splitting element arrays mould group 20, micro- vibrating mirror array 30, light
Penetrate plate 50, regulation mould group 70 and light-modulation panel 90.Preferably clearly to illustrate to the embodiment of the present invention, definition and light reflecting board
50 parallel planes are XOY plane, define perpendicular to XOY plane and are from the direction that micro- vibrating mirror array 30 is directed toward light reflecting board 50
Z-direction, definition are Y-direction perpendicular to paper outwardly direction.
Array of source mould group 10 is located in the input path of micro- vibrating mirror array 30, provides for micro- vibrating mirror array 30
Array light pencil.As shown in Figure 1, array of source mould group 10 can be and be made of multiple light sources unit.As shown in Fig. 2, each light
Source unit includes that lighting source 111 and light collimation combined beam unit 113 form.Lighting source 111 can be monochromatic or polychrome sharp
Light LD light emitting device, is also possible to LED light source.Lighting source 111 is the laser LD for including tri- kinds of wavelength of R, G, B in the present embodiment
Light emitting device.Light collimation combined beam unit 113 can be realized using the collimation lens set in routine techniques with space optical coupling device
The conjunction beam of light beam after the collimation of light beam and the collimation of three kinds of wavelength that are issued to laser LD light emitting device, herein with no restrictions.
As shown in figure 3, array of source mould group 10 includes fiber coupling light source 115 in the mode of alternatively possible realization
With light beam splitting modulation unit 117.Fiber coupling light source 115 can be to be exported by a light source unit and band first shown in Fig. 2
The coupling collimator 1153 of optical fiber 11531 is constituted.The light that light source unit exports tri- kinds of wavelength of R, G, B collimates combined beam light beam, by band
The coupling collimator 1153 of first output optical fibre 11531 is coupled into light beam splitting modulation unit 117.Light beam splitting modulation unit 117 it is defeated
Outlet is coupled with the second output optical fibre 1171, and the light beam for exporting fiber coupling light source 115 is divided into N light beams, and each
The output energy of light beams can be with independent control.
As shown in figure 4, light beam splitting modulation unit 117 can be is integrated with a 1-1*N type PLC plane wave on a silicon substrate
Lead splitter (in figure shown in A1), N number of M-Z type optical modulator (in figure shown in A2) and the second output optical fibre of N beam 1171 (A3 in figure
It is shown) device.1 beam can be inputted homogenizer and be divided into N beam output beam by 1-1*N type PLC slab guide splitter
Optical device.M-Z type optical modulator is a kind of electrooptic modulator, inputs light wave quilt at a Y-branch after one section of optical path
It is divided into two equal beams, is transmitted respectively two optical waveguides made of electrooptical material, its refractive index of this electrooptical material is with additional
The size of voltage and change, two-beam wave can be made to reach at the 2nd Y-branch generation phase difference.If the optical path difference of two-beam is
The integral multiple of wavelength, two-beam coherent enhancement；If the optical path difference of two-beam is the 1/2 of wavelength, two-beam is relevant to be offset, modulator
Very little is exported, therefore light wave can be modulated by controlling voltage.In specific implementation process, the light beam of light source unit output
Light beam splitting modulation unit 117, the 1-1* of light beam splitting modulation unit 117 are coupled by conventional 1153 device of fiber coupling collimator
The light beam being coupled into is divided into the grayscale information point after N beam light according to virtual scene to be shown by N-type PLC slab guide splitter
Energy modulation is not carried out by M-Z type optical modulator, modulated N light beams are exported by the second output optical fibre 1171.Second is defeated
The output end of optical fiber 1171 can have self-focus lens out with welding, or physically be connected with beam collimation lenticule, so that the
Light beam after the output of two output optical fibres 1171 is that collimated light beam or the second output optical fibre 1171 itself have extremely small numerical value
Aperture NA value, output beam approximation collimated light beam.
As shown in figure 5, light beam splitting modulation unit 117 includes 1 1-1*m type PLC in the mode of alternatively possible realization
1-1*n type PLC slab guide splitter (the A5 institute in figure of slab guide splitter (in figure shown in E), m with decoupling optical fiber
Show), m*n M-Z type optical modulator (in figure shown in A6) and the second output optical fibre of m*n beam 1171 (in figure shown in A7), m*n is in number
The quantity for the micro- reflective diffractive element for being included with light reflecting board 50 in value is consistent, i.e., is equal to N in the present embodiment.Light
The light beam of source unit output is coupled into light beam splitting modulation unit 117, light beam splitting modulation unit 117 by conventional fiber coupler
In 1-1*m type PLC slab guide splitter the light beam being coupled into is divided into m light beams, every light beam of m light beams is again
Secondary be coupled into after 1-1*n type PLC slab guide splitter is divided into the output of n light beams, and m light beams are divided into m*n light beams altogether, according to
Energy modulation is carried out by m*n M-Z type optical modulator respectively according to the grayscale information m*n beam light of virtual scene to be shown, after modulation
Light beam by light beam splitting modulation unit 117 carry the second output optical fibre 1171 export.
With continued reference to FIG. 1, diffraction beam splitting element arrays mould group 20 includes multiple diffraction beam splitting elements, it is set to the light
On the emitting light path of source array mould group 10, every beam light pencil that the diffraction beam splitting element exports the array of source mould group 10
Has the function of at least effective diffraction of two-stage.For example, as shown in Figure 1, the diffraction beam splitting element is to the array of source mould group
Every beam light pencil of 10 outputs has the function of the effective diffraction of two-stage.In another example as shown in fig. 6, the diffraction beam splitting element pair
Every beam light pencil that the array of source mould group 10 exports has the function of the effective diffraction of three-level.It should be noted that for letter
Change and draw, array of source mould group 10 is only with multiple light sources unit example in Fig. 6 and in following description.In another example such as Fig. 7 institute
Show, the diffraction beam splitting element has the effective diffraction function of level Four to every beam light pencil that the array of source mould group 10 exports
Energy.Array of source mould group 10 provide array light pencil number of beams numerically with 20 institute of diffraction beam splitting element arrays mould group
The quantity for the diffraction beam splitting element for including is consistent.
Please continue to refer to Fig. 1 or Fig. 6 or Fig. 7, it is separate that light reflecting board 50 is located at the diffraction beam splitting element arrays mould group 20
The side of the array of source mould group 10, every beam light pencil for exporting the diffraction beam splitting element arrays mould group 20 import
To micro- vibrating mirror array 30.Light reflecting board 50 is the plate for being integrated with multiple micro- reflector elements.Micro- reflector element can be with
It is microreflection plane mirror, the microreflection plane mirror is embedded in the light reflecting board 50, and its normal direction and the light
There is non-zero angle between the normal direction of reflecting plate 50 or be parallel to each other.Micro- reflector element can also be a kind of diffraction pattern
Case, the diffraction pattern is on the working face of the light reflecting board 50.Micro- reflector element can also be there is diffraction
Holographic plate, the holographic plate can be on 50 working face of light reflecting board.
Please continue to refer to Fig. 1 or Fig. 6 or Fig. 7, micro- vibrating mirror array 30 includes multiple micro- galvanometer units.Preferably, Mei Gewei
Galvanometer unit is a kind of two-dimentional micro electromechanical scanning device that can be achieved accurately to control.It is clear that each micro- galvanometer unit can also
To be two micro electronmechanical one-dimensional scanning devices, compared to micro electronmechanical two-dimensional scanning device, identical function can be realized, but tie
Structure can be complicated.The quantity of micro- galvanometer unit is R times of the 10 output beam quantity of array of source mould group, and R is greater than 1
Integer.For example, the diffraction beam splitting element has two-stage effective every beam light pencil that the array of source mould group 10 exports
When diffraction function, R=2, as shown in Figure 1.The thin light of every beam that the diffraction beam splitting element exports the array of source mould group 10
When beam has the function of three-level effective diffraction, R=3, as shown in Figure 6.The diffraction beam splitting element is to the array of source mould group
When every beam light pencils of 10 outputs have the function of level Four effective diffraction, R=4, as shown in Figure 7.It is clear that the numerical value of R with
The effective diffraction function that each unit light beam that the diffraction beam splitting element exports the array of source mould group 10 has
Series is related.It for ease of description, include that multiple light sources unit is denoted as first light source unit 11, second by array of source mould group 10
Light source unit 12 ....Multiple diffraction beam splitting elements that diffraction beam splitting element arrays mould group 20 includes are denoted as the first diffraction beam splitting
Element 21, the second diffraction beam splitting element 22 ....It include that multiple micro- reflector elements are denoted as first micro- reflection list by light reflecting board 50
First 51, second micro- reflector element 52, the micro- reflector element 53 of third, the 4th micro- reflector element 54, the 5th micro- reflector element the 55, the 6th
Micro- reflector element 56, the 7th micro- reflector element 57, the 8th micro- reflector element 58 ....It include multiple micro- vibrations by micro- vibrating mirror array 30
Mirror unit is denoted as first micro- galvanometer unit 31, second micro- galvanometer unit 32, the micro- galvanometer unit 33 of third, the 4th micro- galvanometer unit
34, the 5th micro- galvanometer unit 35, the 6th micro- galvanometer unit 36, the 7th micro- galvanometer unit 37, the 8th micro- galvanometer unit 38 ....
1 working principle of projection display equipment shown in FIG. 1 is as follows: the beam Propagation that first light source unit 11 exports to first
Diffraction beam splitting element 21, the first diffraction beam splitting element 21 carry out two-stage diffraction to light beam and export respectively to first micro- reflector element
51 and the second micro- reflector element 52, first micro- reflector element 51 and second micro- reflector element 52 are respectively by first diffraction beam splitting
The two beam light pencils that element 21 exports imported into first micro- galvanometer unit 31 and second micro- galvanometer unit 32, first micro- galvanometer unit
31 and second micro- galvanometer unit 32 angle scanning carried out to incident light beam respectively by the scanning motion of galvanometer.Second light source list
First 12 beam Propagations exported to the second diffraction beam splitting element 22, the second diffraction beam splitting element 22 carry out two-stage diffraction simultaneously to light beam
It is exported respectively to the micro- reflector element 53 of third and the 4th micro- reflector element 54, the micro- reflector element 53 of third and the 4th micro- reflector element
54 that the two beam light pencils that the first diffraction beam splitting element 21 exports are imported into the micro- galvanometer unit 33 and the 4th of third respectively is micro-
Galvanometer unit 34, the micro- galvanometer unit 33 of third and the 4th micro- galvanometer unit 34 are by the scanning motion of galvanometer respectively to incident light
Shu Jinhang angle scanning.The rest may be inferred ... ....
1 working principle of projection display equipment shown in fig. 6 is as follows: the beam Propagation that first light source unit 11 exports to first
Diffraction beam splitting element 21, the first diffraction beam splitting element 21 carry out three-level diffraction to light beam and export respectively to first micro- reflector element
51, second micro- reflector element 52 and the micro- reflector element 53 of third, first micro- reflector element 51, second micro- reflector element 52 and third
The three beams light pencil that the first diffraction beam splitting element 21 exports is imported into first micro- galvanometer unit respectively by micro- reflector element 53
31, second micro- galvanometer unit 32 and the micro- galvanometer unit 33 of third, first micro- galvanometer unit 31, second micro- galvanometer unit 32 and third
Micro- galvanometer unit 33 carries out angle scanning to incident light beam respectively by the scanning motion of galvanometer.Second light source unit 12 exports
Beam Propagation to the second diffraction beam splitting element 22, the second diffraction beam splitting element 22 carries out three-level diffraction to light beam and exports respectively
To the 4th micro- reflector element 54, the 5th micro- reflector element 55 and the 6th micro- reflector element 56, the 4th micro- reflector element the 54, the 5th is micro-
The three beams light pencil that reflector element 55 and the 6th micro- reflector element 56 respectively export the second diffraction beam splitting element 22 imports
To the 4th micro- galvanometer unit 34, the 5th micro- galvanometer unit 35 and the 6th micro- galvanometer unit 36, the 4th micro- galvanometer unit the 34, the 5th is micro-
The scanning motion that galvanometer unit 35 and the 6th micro- galvanometer unit 36 pass through galvanometer carries out angle scanning to incident light beam respectively.According to
This analogizes ... ....
1 working principle of projection display equipment shown in Fig. 7 is as follows: the beam Propagation that first light source unit 11 exports to first
Diffraction beam splitting element 21, the first diffraction beam splitting element 21 carry out level Four diffraction to light beam and export respectively to first micro- reflector element
51, the micro- reflector element 53 of second micro- reflector element 52, third and the 4th micro- reflector element 54, first micro- reflector element 51, second
The micro- reflector element 53 of micro- reflector element 52, third and the 4th micro- reflector element 54 are defeated by the first diffraction beam splitting element 21 respectively
Four beam light pencils out imported into first micro- galvanometer unit 31, second micro- galvanometer unit 32, the micro- galvanometer unit 33 and the 4th of third
Micro- galvanometer unit 34, first micro- galvanometer unit 31, second micro- galvanometer unit 32, the micro- galvanometer unit 33 of third and the 4th micro- galvanometer list
Member 34 carries out angle scanning to incident light beam respectively by the scanning motion of galvanometer.The light beam that second light source unit 12 exports passes
It is defeated to the second diffraction beam splitting element 22, the second diffraction beam splitting element 22 carries out level Four diffraction to light beam and is exported respectively to the 5th micro-
Reflector element 55, the 6th micro- reflector element 56, the 7th micro- reflector element 57 and the 8th micro- reflector element 58, the 5th micro- reflector element
55, the 6th micro- reflector element 56, the 7th micro- reflector element 57 and the 8th micro- reflector element 58 are respectively by second diffraction beam splitting
The four beam light pencils that element 22 exports imported into the 5th micro- galvanometer unit 35, the 6th micro- galvanometer unit 36, the 7th micro- galvanometer unit
37 and the 8th micro- galvanometer unit 38, the 5th micro- galvanometer unit 35, the 6th micro- galvanometer unit 36, the 7th micro- galvanometer unit 37 and the 8th
Micro- galvanometer unit 38 carries out angle scanning to incident light beam respectively by the scanning motion of galvanometer.The rest may be inferred ... ....
Optionally, multiple micro- galvanometer units can be all disposed in same plane, for example, such as Fig. 1, Fig. 3, Fig. 6 and Fig. 7 institute
Show.Multiple micro- galvanometer units can also be arranged in the Different Plane being parallel to each other, for example, as shown in Figure 8 and Figure 9.It is clear that
Multiple micro- galvanometer units can also be respectively distributed in the plane that four or more are parallel to each other, and this will not be repeated here.When more
It, can be by the spacing between setting Different Plane, so that being located at when a micro- galvanometer unit is arranged in the Different Plane being parallel to each other
Micro- galvanometer unit of plane far from the array of source mould group 10 will not be to the plane close to the array of source mould group 10
The scanning ray of micro- galvanometer unit causes to block.
Regulate and control mould group 70, for the spatial positional information according to the corresponding multiple virtual object points of the virtual scene to be shown
The multiple virtual object point projection light pencils of the micro- vibrating mirror array 30 into space are controlled with the mapping relations of scanning information,
So as to project the transmitting cone of beam that the multi beam light pencil on each virtual object point constitutes virtual object point.Wherein, the sky
Between location information include azimuth information and depth information of the virtual object point relative to micro- vibrating mirror array 30, the scanning
When information includes at least the scanning of multiple micro- galvanometer units corresponding with each virtual object point in micro- vibrating mirror array 30
Quarter and scan angle.
Light-modulation panel 90 is Pixel-level high speed spatial light modulator, is placed in the light reflecting board 50 far from micro- vibration
The side of lens array 30, the beam energy exported for modulating micro- vibrating mirror array 30.The light-modulation panel 90 can be
Transmission-type LCOS spatial light modulator, is also possible to LCD spatial light modulator.
As shown in Figure 10, the principle of space projection imaging will be simply introduced below.Why human eye is it can be seen that object, sheet
It is reception of the human eye to the light beam after the reflection or refraction or scattering process of the light wave generation light being irradiated on object, human eye in matter
Characteristic make it possible to be converted to corresponding image information and estimate this object relative to people itself light that thus object issues
Position.Rendered according to the light field of Levoy theoretical, any light human eye of intensity and directional information is carried in space therefore can be with
Pass through reconstruct.The light radiation function of anisotropy light all in space is academicly generally referred to light field, be in space simultaneously
The parametrization of four-dimensional light radiation field comprising position and direction information indicates.The side that the characteristic of human eye makes it only need to have light
The spatial positional information for obtaining image can be converted by the information of brain to information and energy information.Virtual 3D scene can be with
It is considered to be made of the virtual object point of limited not necessary being, can be had by reconstructing each virtual object point of sampling
Radiation direction information and energy information reconstruct three-dimensional scenic.The embodiment of the present invention is by controlling micro- vibrating mirror array 30 with difference
Angle scans projection multi beam and formed with the light beam of specific light energy at the same position E into space have space point light source point
The virtual object point of cloth characteristic, when user is when specific observation area is watched, visually these light beams are all outside by virtual object point E
The cone of beam of sending.According to the spatial positional information and each micro- galvanometer of the corresponding limited sampling virtual point of virtual scene to be shown
The mapping relations of the scanning information of unit control micro- vibrating mirror array 30 to space high-velocity scanning projecting beam, thus in space
Limited limited virtual luminous point with particular beam characteristic and spatial relation is formed, due to the persistence of vision of human eye
Phenomenon, after human eye receives, visually like virtual scene display is in real space.
In specific implementation process, each micro- galvanometer unit can project light beam in each predetermined time, each
Virtual object point to be shown provides corresponding divergent beams by least two micro- galvanometer units and bores, and multiple micro- galvanometer units exist
The light beam projected in preset time constitutes the cone of beam for the virtual object point that must be shown in this preset time, as shown in Figure 10,
Three micro- galvanometer units are respectively that virtual object point E and virtual object point F respectively provide light beam, constitute virtual object point E and virtual object
The part divergent beams of point F are bored, and user is at a certain position in observation area, after receiving virtual object point E and virtual object point F, depending on
Think that there are virtual object point E and virtual object point F in the area to be shown for observing position certain distance away from it in feel.
Projection display equipment 1 provided by the invention includes array of source mould group 10, diffraction beam splitting element arrays mould group 20, micro-
Vibrating mirror array 30, light reflecting board 50, regulation mould group 70 and light-modulation panel 90, pass through diffraction beam splitting element arrays mould group 20, light
The light coupling that reflecting plate 50 and regulation mould group 70 issue array of source mould group 10 controls micro- galvanometer into micro- vibrating mirror array 30
Multiple virtual object points of the array 30 into space project light pencil, so as to project the multi beam light pencil shape on each virtual object point
At transmitting light beam.It is visually equivalent when light beam intersection of the user in the micro- projection of vibrating mirror array 30 of specific observation area sight reception
In emitting light beam from virtual object point to human eye, if the virtual object point high-velocity scanning light beam of the difference into space, due to human eye
The light beam of high-velocity scanning can be identified as continuous light beam by visual persistence phenomenon, human eye.Therefore, in projection display equipment 1 to space
In multiple virtual object point high-velocity scanning light beams when, it appears that as by virtual scene display in real space.To the present invention
Provide a kind of new projection display equipment 1 that can be realized naked eye 3D display.It is clear that the projection display equipment 1 can also
To realize that 2D is shown.
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification (including any accessory claim, abstract and attached drawing), except non-specifically chatting
It states, can be replaced by other alternative features that are equivalent or have similar purpose.That is, unless specifically stated, each feature is only
It is an example in a series of equivalent or similar characteristics.In the description of the present invention, it is also necessary to explanation, term
The orientation or positional relationship of the instructions such as "upper", "lower", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, or
The invention product using when the orientation or positional relationship usually put, be merely for convenience of description of the present invention and simplification of the description,
Rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, because
This is not considered as limiting the invention.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of projection display equipment characterized by comprising
Micro- vibrating mirror array is made of multiple micro- galvanometer units；
Array of source mould group provides array thin light in the input path of micro- vibrating mirror array for micro- vibrating mirror array
Beam；
Diffraction beam splitting element arrays mould group, including multiple diffraction beam splitting elements, positioned at the emitting light path of the array of source mould group
On, the diffraction beam splitting element has at least effective diffraction function of two-stage to every beam light pencil that the array of source mould group exports
Energy；
Light reflecting board is located at micro- vibrating mirror array far from the array of source for the plate for being integrated with multiple micro- reflector elements
The side of mould group, every beam light pencil for exporting the diffraction beam splitting element arrays mould group imported into micro- vibrating mirror array
Each of micro- galvanometer unit；
Regulate and control mould group, for the spatial positional information and scanning information according to the corresponding multiple virtual object points of virtual scene to be shown
Mapping relations control the multiple virtual object points projection light pencils of the micro- vibrating mirror array into space, so as to project every
Multi beam light pencil on a virtual object point constitutes the transmitting cone of beam of virtual object point；
Wherein, the spatial positional information includes azimuth information and depth of the virtual object point relative to micro- vibrating mirror array
Information, the scanning information include at least multiple micro- galvanometer lists corresponding with each virtual object point in micro- vibrating mirror array
The scanning moment of member and scan angle；
Light-modulation panel is Pixel-level high speed spatial light modulator, positioned at the light reflecting board far from micro- vibrating mirror array
Side, for modulating the beam energy of micro- vibrating mirror array output.
2. projection display equipment according to claim 1, which is characterized in that micro- reflector element is microreflection plane
Mirror, the microreflection plane mirror are embedded in the light reflecting board, and the normal direction of its normal direction and the light reflecting board
Between have and non-zero angle or be parallel to each other.
3. projection display equipment according to claim 1, which is characterized in that micro- reflector element can also be that one kind is spread out
Pattern is penetrated, the diffraction pattern is on the working face of the light reflecting board.
4. projection display equipment according to claim 1, which is characterized in that micro- reflector element is that have the function of diffraction
Holographic plate, the holographic plate is on the light reflecting board working face.
5. projection display equipment according to claim 1, which is characterized in that the diffraction beam splitting element is to the light source battle array
Every beam light pencil of column mould group output has the function of the effective diffraction of two-stage.
6. projection display equipment according to claim 1, which is characterized in that the diffraction beam splitting element is to the light source battle array
Every beam light pencil of column mould group output has the function of the effective diffraction of three-level.
7. projection display equipment according to claim 1, which is characterized in that the diffraction beam splitting element is to the light source battle array
Every beam light pencil of column mould group output has the function of the effective diffraction of level Four.
8. projection display equipment according to claim 1, which is characterized in that the array of source mould group is by multiple light sources list
Member is constituted, and each light source unit includes lighting source and light collimation combined beam unit；
The diffraction that the quantity for the light source unit that the array of source mould group includes and the diffraction beam splitting element arrays mould group include
The quantity of beam splitting element is equal.
9. projection display equipment according to claim 1, which is characterized in that the array of source mould group includes fiber coupling
Light source and light beam splitting modulation unit, the fiber coupling light source include the coupling collimation of the first output optical fibre of light source unit and band
Device, the light source unit include lighting source and light collimation combined beam unit；
The light source unit output light collimates combined beam light beam, is coupled into the light by the coupling collimator with first output optical fibre
Beam splitting modulation unit；
The output end of the smooth beam splitting modulation unit is coupled with the second output optical fibre, for by the fiber coupling light source output
Light beam is divided into multi beam numerically equal with the quantity of diffraction beam splitting element that the diffraction beam splitting element arrays mould group includes
Light pencil.
10. projection display equipment according to claim 1, which is characterized in that the light-modulation panel is transmission-type LCOS
Spatial light modulator or LCD spatial light modulator.
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| CN201811343006.3A CN109212871B (en) | 2018-11-13 | 2018-11-13 | projection display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811343006.3A CN109212871B (en) | 2018-11-13 | 2018-11-13 | projection display device |
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| CN109212871B CN109212871B (en) | 2023-11-28 |
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| CN109212871B (en) | 2023-11-28 |
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