CN107065420B - A kind of optical projection system - Google Patents
A kind of optical projection system Download PDFInfo
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- CN107065420B CN107065420B CN201710369268.6A CN201710369268A CN107065420B CN 107065420 B CN107065420 B CN 107065420B CN 201710369268 A CN201710369268 A CN 201710369268A CN 107065420 B CN107065420 B CN 107065420B
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- stimulated emission
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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
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
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- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
The invention discloses a kind of optical projection systems, including：Monochromatic source, display chip, galvanometer, projection lens and projection screen；Display chip, the outgoing beam for receiving monochromatic source, and it is incident on galvanometer after being modulated to the light beam received；Galvanometer is incident on the position of projection lens for changing light beam, passes through the position that projection lens is incident on projection screen to change light beam；Projection screen is formed by least three kinds of stimulated emission units according to setting is regularly arranged, the light of each stimulated emission unit stimulated emission particular color after the illumination by monochromatic source.Since the stimulated emission unit that projection screen includes can send out the light of particular color after by illumination, therefore above-mentioned projection screen provided in an embodiment of the present invention only needs the light for sending out the certain strength of particular color in each location of pixels that can show clear picture, the curvature of field is not present under big visual field, projection lens only needs to be imaged for monochromatic light, greatly reduces the setting difficulty of camera lens.
Description
Technical field
The present invention relates to projection art, espespecially a kind of optical projection system.
Background technology
Optical projection system is when performing image display, it is only necessary to will generate analog signal input projection system by vision cable
System, you can to show image projection on the screen.Due to its convenience in display field using very extensive.Laser is
A kind of high brightness, high directivity, the light source with polarization properties are gradually used as light in recent years due to the plurality of advantages of laser
Source is applied to field of projection display.
A kind of more common laser projection system includes projection light source, ray machine lighting system, light valve component, projection at present
Camera lens and these parts of projection screen.Wherein, laser is can usually include in projection light source, in ninsolid color three-color light source,
It is additionally provided with fluorescent powder wheel, fluorescence occurs for being excited so that laser and fluorescence form three primary colours light, then pass through filter wheel colour filter
Ray machine lighting system is carried out after output.Ray machine lighting system exports light beam to light valve component, such as in digital light processing
In (Digital Light Procession, abbreviation DLP) framework, light valve component can be digital micro-mirror chip (Digital
Micromirror Device, abbreviation DMD), dmd chip receives the driving of picture signal, and three primary colours light light beam is modulated
After export to projection lens, projected light beams upon by projection lens and be supplied to viewer to watch on projection screen.
Since the light that in practical application, off-axis point is sent out is being curved surface by the image planes after optical system, that is, exist
The curvature of field, the curvature of field are the intrinsic properties of spherical optics system.And it is being regarded greatly applied to the laser scanning system in laser projection system
The curvature of field can become larger in the case of, and with the increase at visual angle, the distance of the imaging point of camera lens apart from projection screen is remoter, to nothing
Method makes image planes be overlapped with projection screen, then the imaging watched in projection screen is unsharp.In order to solve this problem,
Just need the scanning lens in scanning system with larger operating distance or with smaller projection screen, it is big to reduce
The image planes curvature of field caused by visual angle.However in the case where the operating distance of camera lens is larger, the volume of optical projection system can be made to become larger,
And laser spot can be made directly to get to projection screen if when the operation elements such as scanning rotary device damage during the work time
On, the normal uses of the equipment such as safety and projection screen to user all there is pole hidden danger.
Invention content
The embodiment of the present invention provides a kind of optical projection system, curvature of field aberration caused by eliminate projection lens.
The embodiment of the present invention provides a kind of optical projection system, including：Monochromatic source, display chip, galvanometer, projection lens and
Projection screen；Wherein,
The display chip, the outgoing beam for receiving the monochromatic source, and the light beam received is modulated
After be incident on the galvanometer；
The galvanometer is incident on the position of the projection lens for changing light beam, passes through the projection to change light beam
Camera lens is incident on the position on the projection screen；
The projection screen by least three kinds of stimulated emission units according to set it is regularly arranged form, be stimulated described in each
Penetrate unit the stimulated emission particular color after the illumination of the monochromatic source light.
In one possible implementation, in above-mentioned optical projection system provided in an embodiment of the present invention, the projection lens
Head is ultra-short focus projection lens.
In one possible implementation, in above-mentioned optical projection system provided in an embodiment of the present invention, the projection screen
Curtain include：Red stimulated emission unit, green stimulated emission unit and blue stimulated emission unit.
In one possible implementation, each described to be excited in above-mentioned optical projection system provided in an embodiment of the present invention
Transmitter unit is the bar shaped of size shape all same；The red stimulated emission unit, green stimulated emission unit and blue
Stimulated emission unit is parallel to be arranged side by side, and is arranged repeatedly with fixed color sequences.
In one possible implementation, each described to be excited in above-mentioned optical projection system provided in an embodiment of the present invention
Transmitter unit is the rectangular of size shape all same；One red stimulated emission unit, a blue stimulated emission
Unit and two green stimulated emission units form a rectangular color group, and the stimulated emission unit of each color is in institute
The position stated in color group is fixed；The red stimulated emission unit and the blue stimulated emission unit are located at the color
On one diagonal line of group, two green stimulated luminescence units are located on another diagonal line of the color group；
Multiple color groups constitute the projection screen by matrix arrangement.
In one possible implementation, in above-mentioned optical projection system provided in an embodiment of the present invention, the projection screen
Curtain is preceding throwing screen, include the protective layer set gradually on the galvanometer direction along the projection lens, by it is each it is described by
Swash stimulated emission layer and the reflecting layer of transmitter unit composition.
In one possible implementation, in above-mentioned optical projection system provided in an embodiment of the present invention, the projection screen
Curtain is rear projection screen, includes stopping the dichroic layer set gradually away from the galvanometer direction along the projection lens, by each described
The stimulated emission layer and protective layer of stimulated emission unit composition.
In one possible implementation, described to be stimulated in above-mentioned optical projection system provided in an embodiment of the present invention
It is quantum dot element or unit and fluorescence unit to penetrate unit.
In one possible implementation, in above-mentioned optical projection system provided in an embodiment of the present invention, the quantum dot
The material of unit is the compound of zinc, cadmium, selenium, element sulphur.
In one possible implementation, in above-mentioned optical projection system provided in an embodiment of the present invention, the monochromatic light
Source is blue light source, purple light light source or ultraviolet source.
In one possible implementation, in above-mentioned optical projection system provided in an embodiment of the present invention, further include：It is located at
The shaping lens of monochromatic source light extraction side.
In one possible implementation, in above-mentioned optical projection system provided in an embodiment of the present invention, further include：Setting
Optical collector between the monochromatic source and the display chip.
The present invention has the beneficial effect that：
Optical projection system provided in an embodiment of the present invention, including：Monochromatic source, display chip, galvanometer, projection lens and throwing
Shadow screen；Display chip, the outgoing beam for receiving monochromatic source, and be incident on and shake after being modulated to the light beam received
Mirror；Galvanometer is incident on the position of projection lens for changing light beam, and projection screen is incident on by projection lens to change light beam
On position；Projection screen is formed by least three kinds of stimulated emission units according to setting is regularly arranged, each stimulated emission unit
The light of stimulated emission particular color after the illumination by monochromatic source.Since the stimulated emission unit that projection screen includes can
The light of particular color is sent out after by illumination, therefore above-mentioned projection screen provided in an embodiment of the present invention is only needed in each pixel
The light that position sends out the certain strength of particular color can show clear picture, and no longer be connect projection screen as receiving screen
The imaging for receiving projection lens shows image, and from the field curvature problems as caused by projection lens may be not present, projection lens only needs needle
Monochromatic light is imaged, the setting difficulty of camera lens is greatly reduced.
Description of the drawings
Fig. 1 is one of the structural schematic diagram of optical projection system provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of upper projection screen provided in an embodiment of the present invention；
Fig. 3 a are the arrangement architecture schematic diagram for the stimulated emission unit that one embodiment of the invention provides；
Fig. 3 b are the vibration position schematic diagram for the galvanometer that one embodiment of the invention provides；
Fig. 3 c are the arrangement architecture schematic diagram for the emitting red light point that one embodiment of the invention provides；
Fig. 3 d are the arrangement architecture schematic diagram for the green emitting point that one embodiment of the invention provides；
Fig. 3 e are the arrangement architecture schematic diagram for the blue-light-emitting point that one embodiment of the invention provides；
Fig. 3 f are the arrangement architecture schematic diagram for each colour light emitting point that one embodiment of the invention provides；
Fig. 4 a are the arrangement architecture schematic diagram for the stimulated emission unit that another embodiment of the present invention provides；
Fig. 4 b are the vibration position schematic diagram for the galvanometer that another embodiment of the present invention provides；
Fig. 4 c are the arrangement architecture schematic diagram for the emitting red light point that another embodiment of the present invention provides；
Fig. 4 d are the arrangement architecture schematic diagram for the blue-light-emitting point that another embodiment of the present invention provides；
Fig. 4 e are one of the arrangement architecture schematic diagram for the green emitting point that another embodiment of the present invention provides；
Fig. 4 f are the two of the arrangement architecture schematic diagram for the green emitting point that another embodiment of the present invention provides；
Fig. 4 g are the arrangement architecture schematic diagram for each colour light emitting point that another embodiment of the present invention provides；
Fig. 5 a are one of the structural schematic diagram of projection screen provided in an embodiment of the present invention；
Fig. 5 b are the second structural representation of projection screen provided in an embodiment of the present invention；
Fig. 6 is the second structural representation of optical projection system provided in an embodiment of the present invention.
Specific implementation mode
The embodiment of the present invention provides a kind of optical projection system, curvature of field aberration caused by eliminate projection lens.
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
The optical projection system of specific embodiment of the invention offer is provided below in conjunction with the accompanying drawings.
As shown in Figure 1, optical projection system provided in an embodiment of the present invention, including：Monochromatic source 11, display chip 12, galvanometer
13, projection lens 14 and projection screen 15.
Wherein, display chip 12, the outgoing beam for receiving monochromatic source 11, and the light beam received is modulated
After be incident on galvanometer 13；
Galvanometer 13 is incident on the position of projection lens 14 for changing light beam, is entered by projection lens 14 with changing light beam
It is mapped to the position on projection screen 15.
Further, as shown in Fig. 2, above-mentioned projection screen 15 provided in an embodiment of the present invention is by least three kinds of stimulated emissions
Unit 151 is formed according to setting is regularly arranged, each stimulated emission after the illumination by monochromatic source of stimulated emission unit 151
The light of particular color.
As shown in Fig. 2, in above-mentioned optical projection system provided in an embodiment of the present invention, projection screen is by a variety of stimulated emissions
What unit 151 formed, these stimulated emission units 151 can be arranged according to certain rule, and queueing discipline distinguishes galvanometer
Revolving property have certain otherness.But no matter use which kind of queueing discipline, will make stimulated emission unit 151 by
The light of each color emitted after the illumination of monochromatic source has the characteristic that pixel unit shines, so that in pixel unit
Each color lump complete display picture can be presented when being lighted with the brightness with Signal Matching.Exactly because the embodiment of the present invention provides
Above-mentioned optical projection system use this picture display process, projection lens 14 will pass through modulated light beam of light source difference deviation both
Fixed angle is to be incident on the designated position of projection screen 15, as long as then in above-mentioned specified location setting and modulation light
The stimulated emission unit that signal matches can launch the light of the particular color of certain luminance at this location.In projection screen
On each pixel unit position by that can show that whole picture shows picture after above-mentioned processing, and use this hair
When the above-mentioned projection screen that bright embodiment provides is shown, be light stimulated emission unit and shine to be shown, rather than with
Projection screen carrys out the imaging of display projecting lens as a receiving screen, therefore will not be again by the curvature of field caused by projection lens
The influence of aberration, to which projection lens can select the different types of camera lenses such as focal length, short focus or ultrashort coke according to actual requirement.
Can be with the volume of reduced projection system when selecting short-focus lens, safety problem when avoiding using.
Further, since above-mentioned projection screen provided in an embodiment of the present invention uses the shape of stimulated emission unit combination
Formula, therefore the light source of optical projection system no longer needs that colour filter wheel component is arranged only with monochromatic source, and in optical projection system, directly
It connects and intensification modulation is carried out to the light beam of monochromatic source, thus, it is possible to the volume of optical projection system is further decreased, it also can be one
Determine the complexity of simplified signal modulation in degree.In addition, by the energy level principle of stimulated emission it is found that stimulated emission unit 151
The light of absorption high-energy, which is stimulated, projects the light of long low energy, therefore the wave band of monochromatic source transmitting light should be less than stimulated emission list
Member 151 emits the wave band of light.
In a particular application, in order to reduce the volume of optical projection system, shorten the distance between projection device and projection screen,
Ultra-short focus projection lens may be used as above-mentioned projection lens 14.
Further, stimulated emission unit 151 typically at least should include being stimulated to project display three primary colours light used
Type.For example, as shown in Fig. 2, above-mentioned projection screen provided in an embodiment of the present invention may include：It is red stimulated emission unit R, green
Color stimulated emission unit G and blue stimulated emission unit B.Wherein, red stimulated emission unit R is after the energy for absorbing light source
Red light can be launched, green stimulated emission unit G can launch green light, blue stimulated emission after the energy for absorbing light source
Unit B can launch blue light after the energy for absorbing light source.Stimulated emission unit 151 according to mode as shown in Figure 2 into
When row arrangement, the quantity of red stimulated emission unit R, green stimulated emission unit G and blue stimulated emission unit B is equal,
And with a red stimulated emission unit R, a green stimulated emission unit G and the blue stimulated emission unit in a line
B may be constructed a pixel unit.At this moment the scan mode of optical projection system can be the mode of field scan, you can so that monochromatic source
Light beam can be incident on the stimulated emission unit 151 of same color in each pixel unit every time, it is each to excite every time
The light of same color in pixel unit, then can change the incoming position of light beam by changing the rotation angle of galvanometer 13,
So that exciting red light, green light and the blue light in each pixel unit respectively at a terrific speed.Not due to human eye
The color switching that can identify above-mentioned speed, the delay of each color, which can be formed, in human eye completely shows picture.
In another enforceable scheme, as shown in Figure 3a, in above-mentioned projection screen provided in an embodiment of the present invention,
Each stimulated emission unit 151 is the bar shaped of size shape all same.
Wherein, red stimulated emission unit R, green stimulated emission unit G and blue stimulated emission unit B are parallel side by side
Arrangement, and arranged repeatedly with fixed color sequences.
By taking queueing discipline shown in Fig. 3 a as an example, red stimulated emission unit R, green stimulated emission unit G and blue
Stimulated emission unit B is the identical strip structure of size, and each stimulated emission unit is according to the color sequences of RGB along first party
To being arranged side by side.In practical applications, the scan mode of optical projection system can be field scan mode, the outgoing beam of monochromatic source 11
Light beam identical with pixel unit number can be being formed after display chip 12, using can be incident after the reflection of galvanometer 13
To the different location of projection lens 14, to be incident at the different location of projection screen 15.
Specifically, in embodiments of the present invention, as shown in Figure 3b, galvanometer 13 can be rotated along axis PP ', with the speed being exceedingly fast
Degree is vibrated in tri- positions A, B, C respectively.Display chip 12 can be dmd chip, and the emergent light of monochromatic source 11 is passing through DMD cores
Light beam of the multi beam through ovennodulation is emitted after piece to be incident on galvanometer 13, since galvanometer 13 is in tri- position sustained vibrations of A, B, C, because
This light beam with different luminance signals can be incident on throwing after the galvanometer under three kinds of different conditions with different intensity
On the different location of shadow screen 15.For example, as shown in the upper figure of Fig. 3 c, when the state of galvanometer 13 is in location A, multiple beam is rigid
It is incident on the position where red stimulated emission unit R in projection screen 15 well, therefore red stimulated emission unit R is by light
According to stimulated emission red light later, projection screen is displayed in red bright spot as bottom illustration in figure 3 c, works as galvanometer in the present embodiment
13 be in location A when, projection screen can array of display arrangement emitting red light point r.Similarly, as shown in Figure 3d, when galvanometer 13
State when being in B location, light beam is incident on the position where 15 Green stimulated emission unit G of projection screen, projection screen
Can array of display arrangement green emitting point g；As shown in Figure 3 e, when the state of galvanometer 13 is in location of C, light beam is incident on throwing
Position in shadow screen 15 where blue stimulated emission unit B, projection screen can array of display arrangement blue-light-emitting point b.When
Galvanometer 13 with the speed of human eye None- identified in tri- position sustained vibrations of A, B, C, since human eye acts on the delay of image,
The watched figure of human eye as illustrated in figure 3f, with an emitting red light point r, a green emitting point g and the blue of every row
When luminous point b is as pixel unit (Pixel), when the luminous point of the different colours in each pixel unit has its right
When the brightness answered, you can display surface is watched to draw.
In another enforceable scheme, as shown in fig. 4 a, in above-mentioned projection screen provided in an embodiment of the present invention,
Each stimulated emission unit 151 is the rectangular of size shape all same；One red stimulated emission unit R, a blue are stimulated
It penetrates unit B and two green stimulated emission unit G forms a rectangular color group P, and the stimulated emission unit of each color exists
Position in color group P is fixed；Red stimulated emission unit R and blue stimulated emission unit B be located at color group P one are right
On linea angulata, two green stimulated luminescence unit G are located on another diagonal line of color group P；Multiple color groups are arranged by matrix
Constitute projection screen.
By taking queueing discipline shown in Fig. 4 a as an example, above-mentioned practical position for having corresponded to a pixel unit color group P
It sets, in practical applications, the scan mode of optical projection system can be field scan mode, and the outgoing beam of monochromatic source 11 is by aobvious
Light beam identical with pixel unit number can be formed after showing chip 12, projection lens can be incident on after the reflection of galvanometer 13
First 14 different location, to be incident at the different location of projection screen 15.
Specifically, in embodiments of the present invention, as shown in Figure 4 b, galvanometer 13 can be respectively with its two diagonal line X1And X2
It is rotated for axis, is vibrated respectively in tetra- positions A, B, C, D at a terrific speed.Since galvanometer 13 is in tri- positions A, B, C
Sustained vibration, therefore the light beam with different luminance signals, after the galvanometer under three kinds of different conditions, meeting is with different
Intensity is incident on the different location of projection screen 15.In galvanometer 13 with diagonal line X1When being rotated for axis, vibration position
For A and B；In galvanometer 13 with diagonal line X2When being rotated for axis, vibration position is C and D.Galvanometer 13 is in A, B, C, D tetra-
Position sustained vibration, the light beam with different luminance signals is after the galvanometer under four kinds of different conditions, and meeting is with different
Intensity is incident on the different location of projection screen 15.For example, as shown in Figure 4 b, as the diagonally X of galvanometer 131For axis and state
When in location A, multiple beam is just incident on the position where red stimulated emission unit R in projection screen 15, therefore red
Stimulated emission unit R stimulated emission red light after by illumination, the bright red spot r of projection screen array of display arrangement, such as
Shown in Fig. 4 c；Similarly, when the state of galvanometer 13 is in B location, multiple beam be just incident in projection screen 15 blue by
The position where unit B, therefore blue stimulated emission unit B stimulated emission blue light after by illumination, projection are penetrated in excitation
The blue bright spot b of screen display array arrangement, as shown in figure 4d；As the diagonally X of galvanometer 132It is in location of C for axis and state
When, multiple beam is just incident on the position where 15 Green stimulated emission unit G of projection screen, therefore green stimulated emission list
First G stimulated emission green lights after by illumination, the green bright spot g of projection screen array of display arrangement, as shown in fig 4e；When
When the state of galvanometer 13 is in the positions D, multiple beam is just incident on the position where 15 Green stimulated emission unit G of projection screen
It sets, therefore green stimulated emission unit G stimulated emission green lights after by illumination, projection screen array of display is arranged green
Color bright spot g, as shown in fig. 4f.When galvanometer 13 with the speed of human eye None- identified in tetra- position sustained vibrations of A, B, C, D when, by
The delay of image is acted in human eye, the watched figure of human eye as shown in figure 4g, with an emitting red light point in dotted line frame
R, when two green emitting point g and a blue-light-emitting point b are as pixel unit (Pixel), when in each pixel unit
Different colours luminous point all have its corresponding brightness when, you can watch display surface to draw.
Compared to more above-mentioned embodiment as illustrated in figs. 3 a-f and embodiment as shown in figs 4 a-4g, the latter is based on real
Border is maximum using the brightness output of Green, therefore two green emitting point g are used in a pixel unit, improves display
Brightness.In addition, the luminous point of the former same color differs the distance of two luminous points in two neighboring pixel unit, and the latter
The distance of a luminous point is differed only by, therefore relative to the former aperture opening ratio higher, display effect is preferable.And the former is making projection
Obviously it is easy to the latter when screen, therefore in practical applications, suitable projection screen form can be selected according to actual demand.With
On embodiment be for example, the projection screen of other other queueing disciplines designed using present inventive concept is belonged to
Protection scope of the present invention.
Further, in the specific implementation, above-mentioned projection screen provided in an embodiment of the present invention, can not only be used for front projection system
Preceding throwing screen in system, also can be used as the rear projection screen in back projecting system.
Above-mentioned projection screen be preceding throwings screen when, as shown in Figure 5 a, including along projection lens deviate from galvanometer direction on according to
The protective layer 152 of secondary setting, the stimulated emission layer 150 being made of each stimulated emission unit and reflecting layer 153.Preceding throwing is shielded
For curtain, viewer and projection device are located at the same side, by the light incidence in system screen forward of projection lens, are stimulated
It penetrates layer 150 and absorbs incident laser energy stimulated emission at least three kinds of primary lights, a part of exciting light directly emits to viewer side,
A part of exciting light emits to reflecting layer 153, is emitted again to viewer side after the reflection in reflecting layer 153.
When above-mentioned projection screen is rear projection screen, as shown in Figure 5 b, including along projection lens on the galvanometer direction according to
The dichroic layer 154 of secondary setting, the stimulated emission layer 150 being made of each stimulated emission unit and protective layer 152.By projection
The light beam of camera lens first passes through dichroic layer 154 and exposes to stimulated emission layer 150, and stimulated emission layer 150 absorbs incident laser energy
Stimulated emission at least three kinds of primary lights, then be emitted to 152 side of protective layer, finally it is incident to human eye.The effect of dichroic layer 154
For by the light of monochromatic source, and the exciting light of stimulated emission layer 150 is reflected, it is possible thereby to which the display for improving projection screen is bright
Degree promotes display effect.
In practical applications, the above-mentioned stimulated emission layer usually fluorescence transition material with stimulated emission property is made.With
Existing Fresnel optical screen is compared, and since above-mentioned projection screen provided in an embodiment of the present invention is luminescent screen, and is used
Fluorescence transition material light emitting angle range it is larger, thus visible angle range is compared to existing optical screen bigger, display
Effect is good.Plated film may be used in reflecting layer 153 or the mode of coating reflectorized material is made, and does not limit herein.
Embodiment as one preferred, stimulated emission unit are quantum dot element, the i.e. material of stimulated emission unit
Quanta point material can be used.
Further, the material of quantum dot element is the compound of zinc, cadmium, selenium, element sulphur, is a kind of semi-conducting material,
The nano-particle for being about 2-10nm for diameter.The luminosity of quantum dot can be regulated and controled by changing the size of quantum dot.It is logical
Crossing the size for changing quanta point material and chemical composition can make its fluorescence emission wavelengths cover entire visible region.Normal conditions
Under, quantum dot is smaller, sends out light indigo plant more partially, otherwise quantum dot is bigger, and the light sent out the partially red.
When monochromatic source is blue laser light source, the blue quanta point material satisfaction being arranged on projection screen can be excited
Emit blue light, green quanta point material meet can stimulated emission green light, red quantum dot material meet can stimulated emission it is red
Light.
Wherein, the fluorescence spectrum absorption region of blue light quantum point is 350-400nm.The core being made of cadmium sulfide and zinc sulphide
Shell structure can launch blue light, and identical quanta point material, with the reduction of size, blue shift occurs for fluorescent absorption spectrum.First
Aqueous solution is received in vulcanization two to mix with sodium diethylhexyl solution, has then been mixed with out vulcanization with caddy precursor solution
Cadmium quanta point material.Zinc dichloride solution is injected into cadmiumsulfide quantum dot solution again and prepares zinc sulphide shell structure.In purple
Under the excitation of outer light, visible wavelength that cadmium sulfide/zinc sulphide nucleocapsid is launched is by quantum dot size and shell thickness
It influences.
The fluorescence spectrum absorption region of green light quantum point is 450-550nm.Cadmium oxide is dissolved in ten under the high temperature conditions
In tetraalkyl phosphoric acid, selenium powder is dissolved in tri octyl phosphine and is injected into oxidation cadmium solution, reacts and prepares under 190-210 DEG C of environment
Go out CdSe quantum dots material.After testing, the luminous efficiency of this quantum-dot structure is more preferable, mainly due to being made under hot conditions
Forbidden band potential barrier for the CdSe quantum dots structure gone out broadens so that the energy of the photon of quantum dot stimulated emission becomes larger.
In addition to this, above-mentioned monochromatic source 11 provided in an embodiment of the present invention can also be purple light light source in addition to blue light source
Or ultraviolet source.The luminescence unit of fluorescent material can also be used in stimulated emission unit 151, does not limit herein, as long as using this
Inventive concept and the other applicable monochromatic sources and stimulated emission material replaced each fall within protection scope of the present invention.
In the specific implementation, in above-mentioned optical projection system provided in an embodiment of the present invention, as shown in fig. 6, further including：It is located at
The shaping lens 16 of 11 light extraction side of monochromatic source, and the optical collector that is arranged between monochromatic source 11 and display chip 12
17.Monochromatic source generally use mono-colour laser in practical application, and there is the laser of laser emitting asymmetry, astigmatism etc. to lack
It falls into, it is therefore desirable to shaping lens 16 are then set in the light extraction of laser, shaping is carried out to shoot laser.And optical collector 17 can incite somebody to action
Laser after shaping is effectively collected on display chip so that display chip carries out signal modulation to incident light beam.
Optical projection system provided in an embodiment of the present invention, including：Monochromatic source, display chip, galvanometer, projection lens and throwing
Shadow screen；Display chip, the outgoing beam for receiving monochromatic source, and be incident on and shake after being modulated to the light beam received
Mirror；Galvanometer is incident on the position of projection lens for changing light beam, and projection screen is incident on by projection lens to change light beam
On position；Projection screen is formed by least three kinds of stimulated emission units according to setting is regularly arranged, each stimulated emission unit
The light of stimulated emission particular color after the illumination by monochromatic source.Since the stimulated emission unit that projection screen includes can
The light of particular color is sent out after by illumination, therefore above-mentioned projection screen provided in an embodiment of the present invention is only needed in each pixel
The light that position sends out the certain strength of particular color can show clear picture, and no longer be connect projection screen as receiving screen
The imaging for receiving projection lens shows image, and from the field curvature problems as caused by projection lens may be not present, projection lens only needs needle
Monochromatic light is imaged, the setting difficulty of camera lens is greatly reduced.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications can be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (12)
1. a kind of optical projection system, which is characterized in that including：Monochromatic source, display chip, galvanometer, projection lens and projection screen
Curtain；Wherein,
The display chip, the outgoing beam for receiving the monochromatic source, and enter after being modulated to the light beam received
It is mapped to the galvanometer；
The galvanometer is incident on the position of the projection lens for changing light beam, passes through the projection lens to change light beam
It is incident on the position on the projection screen；
The projection screen is formed by least three kinds of stimulated emission units according to setting is regularly arranged, each described stimulated emission list
Light of the member in the stimulated emission particular color after the illumination of the monochromatic source；It is same to be once incident on the projection screen
Light excites the light of same color.
2. optical projection system as described in claim 1, which is characterized in that the projection lens is ultra-short focus projection lens.
3. optical projection system as described in claim 1, which is characterized in that the projection screen includes：Red stimulated emission unit,
Green stimulated emission unit and blue stimulated emission unit.
4. optical projection system as claimed in claim 3, which is characterized in that each stimulated emission unit is size shape all same
Bar shaped；The red stimulated emission unit, green stimulated emission unit and blue stimulated emission unit is parallel is arranged side by side,
And it is arranged repeatedly with fixed color sequences.
5. optical projection system as claimed in claim 3, which is characterized in that each stimulated emission unit is size shape all same
It is rectangular；One red stimulated emission unit, a blue stimulated emission unit and two greens are excited
Transmitter unit forms a rectangular color group, and position of the stimulated emission unit of each color in the color group is fixed；Institute
It states red stimulated emission unit and the blue stimulated emission unit is located on a diagonal line of the color group, two institutes
Green stimulated luminescence unit is stated to be located on another diagonal line of the color group；
Multiple color groups constitute the projection screen by matrix arrangement.
6. optical projection system as described in claim 1, which is characterized in that the projection screen is preceding throwing screen, including along described
Projection lens deviates from the protective layer set gradually on the galvanometer direction, the stimulated emission being made of each stimulated emission unit
Layer and reflecting layer.
7. optical projection system as described in claim 1, which is characterized in that the projection screen is rear projection screen, including along described
Projection lens deviates from the dichroic layer set gradually on the galvanometer direction, is excited by what each stimulated emission unit formed
Emission layer and protective layer.
8. such as claim 1-7 any one of them optical projection systems, which is characterized in that the stimulated emission unit is quantum dot list
Member or unit and fluorescence unit.
9. optical projection system as claimed in claim 8, which is characterized in that the material of the quantum dot element is zinc, cadmium, selenium, sulphur
The compound of element.
10. such as claim 1-7 any one of them optical projection systems, which is characterized in that the monochromatic source is blue light source, purple
Radiant or ultraviolet source.
11. such as claim 1-7 any one of them optical projection systems, which is characterized in that further include：Go out positioned at the monochromatic source
The shaping lens of light side.
12. such as claim 1-7 any one of them optical projection systems, which is characterized in that further include：It is arranged in the monochromatic source
With the optical collector between the display chip.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2020228595A1 (en) * | 2019-05-14 | 2020-11-19 | 青岛海信激光显示股份有限公司 | Projection lens and laser projection device |
| CN110602470B (en) * | 2019-09-20 | 2022-02-08 | 青岛海信激光显示股份有限公司 | Projection display system and control method thereof |
| CN111508383B (en) * | 2020-04-23 | 2022-03-25 | 歌尔光学科技有限公司 | Imaging method, imaging apparatus, and computer-readable storage medium |
| CN111929890A (en) * | 2020-09-25 | 2020-11-13 | 歌尔股份有限公司 | Display device, display method, and computer-readable storage medium |
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Effective date of registration: 20200813 Address after: 266000, No. 218, Bay Road, Qingdao economic and Technological Development Zone, Shandong Patentee after: Qingdao Hisense Laser Display Co.,Ltd. Address before: Donghai West Road 266071 Shandong city of Qingdao province No. 17 Patentee before: HISENSE Co.,Ltd. |