CN105573031B - A kind of light source and laser projection device - Google Patents
A kind of light source and laser projection device Download PDFInfo
- Publication number
- CN105573031B CN105573031B CN201510948990.6A CN201510948990A CN105573031B CN 105573031 B CN105573031 B CN 105573031B CN 201510948990 A CN201510948990 A CN 201510948990A CN 105573031 B CN105573031 B CN 105573031B
- Authority
- CN
- China
- Prior art keywords
- laser
- light source
- transmission area
- light
- micro
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Optics & Photonics (AREA)
- Projection Apparatus (AREA)
- Optical Filters (AREA)
Abstract
The invention discloses a kind of light sources, including laser, send out the laser of at least one color；Fluorescent wheel, for receiving laser irradiation and generating the fluorescence of at least one color；Filter wheel, including color filter regions and transmission area, wherein, color filter regions are used to receive the fluorescence of at least one color and filter output, transmission area is used to transmit the laser of at least one color, wherein, the incidence surface and light-emitting surface of transmission area are both provided with micro-structure, dissipation spot can also be diffused to laser while being transmitted to laser, make the functional diversities of colour filter wheel component, and the use of individual dissipation spot component can be saved or reduced in light source framework, it is conducive to the compression of the simplification and light source volume of light source framework.The present invention also provides a kind of laser projection devices, using the light source of above-mentioned technical proposal.
Description
Technical field
The present invention relates to projection display technique field more particularly to a kind of light sources of Projection Display.
Background technology
Laser light source has and highlights, efficiently, the service life is normal, and colour gamut is good, the series of advantages such as environmental protection as a kind of solid state light emitter
As the selection of emerging projection light source.
In the laser light source used in industry at present, Wavelength converter can be used to generate glimmering in addition to laser color
Light, and three primary colours are collectively formed with laser.Such as Fig. 1 examples, laser 10 sends out laser, specially blue laser, wavelength convert
Device 20 is coated with fluorescent powder, specially green emitting phosphor and yellow fluorescent powder, 20 Periodic Rotating of Wavelength converter, to
Laser facula gets to Wavelength converter surface successively, and different fluorescent powders is excited to send out the fluorescence of corresponding color.But due to
Fluorescence spectra caused by fluorescent material is wider, keeps the primary colours optical purity of corresponding color insufficient, leads to the colour gamut table of light source
It is existing bad, and it is expected that by the light that other colors are obtained by filtration, for example yellow fluorescence is filtered to obtain by Red lightscreening plate
Red fluorescence is generally required and is filtered to fluorescence by optical filter, can either improve the excitation purity of fluorescence, can also be obtained and be expired
The color of prestige.Therefore by being provided with 30 component of filter wheel in the lighting system front end of the rear end of Wavelength converter 20, ray machine
To reach above-mentioned purpose.Colour filter wheel component includes multiple filter sets that can filter different colours at and being filled with wavelength convert
Set the rotation of 20 property synchronizing cycle.Filter wheel 30 and Wavelength converter 20 have the color subregion of corresponding center of circle angle, such as
It being capable of timing with the synchronous rotary of two colour wheels including green light optical filter and feux rouges optical filter and blue laser transmission area
Output three primary colours light, the optical wand 40 into ray machine homogenized, and provides illumination for ray machine, and ultimately form the throwing of bright colors
Shadow picture.
And since laser purity itself is higher, the laser regional transmission on colour filter wheel component is usually no longer set as pair
Stress light color optical filter, but transparent glass, Fig. 2 shows a kind of structural schematic diagram of filter wheel in the prior art, packets
Include the blue laser transmission area 33 of green color filter 31, Red lightscreening plate 32 and transparent glass material.
Also, from the foregoing it will be appreciated that due to the high coherence of laser, when forming projected picture as light source, meeting is inevitable
Ground forms speckle effect, therefore usually also needs in above-mentioned light source framework shown in FIG. 1 additionally to be added such as diffusion sheet, at random
Phaser or multimode fibre carry out dissipation spot, speckle effect caused by mitigate laser beam.This so that light source framework is multiple
Miscellaneous, component is more, and volume is also relatively large.
Invention content
The invention discloses a kind of light source, including laser, fluorescent wheel and filter wheel pass through entering in filter wheel transmission area
Smooth surface and light-emitting surface are both provided with micro-structure, can play the role of spreading dissipation spot to the laser for transmiting the region so that filter
The functional diversities of colour wheel.
What the object of the invention was achieved through the following technical solutions：
A kind of light source, including laser send out the laser of at least one color；Fluorescent wheel, for receiving laser irradiation simultaneously
Generate the fluorescence of at least one color；Filter wheel, including color filter regions and transmission area, wherein color filter regions are for receiving at least one
The fluorescence of color simultaneously filters output, and transmission area is used to transmit the laser of at least one color, wherein the incidence surface of transmission area and
Light-emitting surface is both provided with micro-structure；
Further, the micro-structure of the incidence surface of transmission area and/or light-emitting surface is in by dredging along the circumferencial direction of filter wheel
It is close to be arranged to white-out；
Further, transmission area is diffusion sheet or frosted glass material；
Further, granular micro-structure degree is less than or equal to 10 μm；
Further, micro-structure is formed by photoetching process；
Further, micro-structure is that scattering particles coating is formed；
Further, laser sends out blue laser, and transmission area includes blue light transmission area；
Further, laser sends out blue laser and red laser, and transmission area includes blue light transmission area and red transmission
Area；
Further, the micro-structure of the incidence surface of transmission area and light-emitting surface is respectively along the radial direction of filter wheel and circumference side
To arrangement；
Further, diffusion sheet or frosted glass thickness are less than or equal to 0.7mm；
And the invention also provides a kind of laser projection device, including light source, ray machine, camera lens and screen, wherein
Light source uses the light source of any of the above-described technical solution.
Technical solution of the embodiment of the present invention, at least has the following technical effect that or advantage：
The light source that technical solution of the embodiment of the present invention provides, including laser, fluorescent wheel and filter wheel, wherein filter wheel remove
Have the function of other than colour filter raising purity to the fluorescence that fluorescent wheel generates, is also all provided in the incidence surface of transmission area and light-emitting surface
It is equipped with micro-structure, with filter wheel Periodic Rotating, laser can be by the micro-structure on the surface in incident transmission area incidence surface
It is diffused, a certain number of random phases spatially is generated to laser beam, the generation of random phase can destroy interference
Condition can weaken the coherence of laser, and when being projected from the light-emitting surface of transmission area, can be arranged on light-emitting surface again
Micro-structure be diffused, again result in the generation of random phase, further weaken laser coherence, finally light source is made to throw
It penetrates in the picture to be formed and forms multiple independent speckle patterns, using the integral action of human eye, the speckle effect of picture can be significantly
Weaken.To which laser can also carry out dissipation spot while by filter wheel transmission output, keep the function of colour filter wheel component more
Sample.
Simultaneously as filter wheel can carry out dissipation spot to laser, it can save or reduce in light source framework individually
Dissipation spot component use, be conducive to light source framework simplification and light source volume compression.
The laser projection device that technical solution of the embodiment of the present invention proposes, using the light source of above-mentioned technical proposal, filter wheel
Component can either timing export three primary colours, while preferable dissipation spot also is carried out to laser, improves projected image quality, with
And the use of spot component of individually dissipating in light source framework can be saved or reduce, it is conducive to the simplification of light source framework, light source volume
Compression, and conducive to projection arrangement miniaturization.
Description of the drawings
Fig. 1 is a kind of configuration diagram of light source in the prior art；
Fig. 2 is a kind of structural schematic diagram of filter wheel in the prior art；
Fig. 3 is the light source configuration diagram in the embodiment of the present invention one；
Fig. 4 A are the plane partitioned organization schematic diagram of filter wheel in the embodiment of the present invention one；
Fig. 4 B are the another plane partitioned organization schematic diagram of filter wheel in the embodiment of the present invention one；
Fig. 5 A, 5B are respectively a kind of cross sectional shape schematic diagram of micro-structure of the embodiment of the present invention；
Fig. 6 is the light source configuration diagram in the embodiment of the present invention two；
Fig. 7 is the plane partitioned organization schematic diagram of filter wheel in the embodiment of the present invention two；
Fig. 8 is the light source configuration diagram in the embodiment of the present invention three；
Fig. 9 A, 9B are respectively the orientation schematic diagram of three kinds of micro-structures of the embodiment of the present invention；
Figure 10 is the Gaussian shaped profile schematic diagram of laser；
Figure 11 is the horizontal cross-section structure diagram of filter wheel in the embodiment of the present invention three；
Figure 12 is laser projection device configuration diagram in the embodiment of the present invention four；
Figure 13 is a specific implementation structural schematic diagram of laser projection device in the embodiment of the present invention four.
Specific implementation mode
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.
Below in conjunction with attached drawing, technical solution provided in an embodiment of the present invention is described in detail.
Embodiment one
The present invention is intended to provide a kind of light source, as shown in figure 3, including laser 10, the laser light incident that laser 10 is sent out
Fluorescent wheel 20, with the Periodic Rotating of fluorescent wheel, 20 receiving portion laser irradiation of fluorescent wheel simultaneously generates fluorescence and transmissive portions
The laser of shunt excitation light, fluorescence and transmission incident filter wheel 30 after 40 closing light of closing light component, by 30 colour filter of filter wheel and transmission
Afterwards, the output three primary colours light of timing, and eventually enter into optical wand 50 and homogenized, provide illumination for x ray machine part.
Specifically, laser 10 can be one group, or it is multigroup, for example can be two groups be arranged vertically, and lead to
It crosses light combination mirror piece and synthesizes a branch of outgoing, in the present embodiment, laser 10 sends out blue laser.
Since the beam area that laser is sent out is larger, need to become the light for meeting fluorescence excitation requirement by beam shaping
Spot, as shown in figure 3, laser beam, which also passes through telescopic system 11, carries out shrink beam so that the facula area of laser becomes smaller.
In the present embodiment, fluorescent wheel 20 includes phosphor region and transmission area, and wherein phosphor region includes green emitting phosphor and Huang
Color fluorescent powder, phosphor region and transmission area are distributed each along the excircle of fluorescent wheel 20, and blue laser hot spot irradiates the outer circle successively
All regions can excite corresponding phosphor area to generate green fluorescence and yellow fluorescence, and go out from transmissive region successively
It goes.In a specific implementation, fluorescent wheel 20 is reflective fluorescent wheel, and it is anti-by the aluminum substrate minute surface of fluorescent wheel to be excited the fluorescence generated
It penetrates, edge is projected in the opposite direction with laser light incident side, and reaches closing light component 40, by multiple eyeglasses after blue laser transmission
The relaying circuit of composition returns again to the front of fluorescent wheel 20, also converges to closing light component 40, and specifically, closing light component 40 can
Think dichroic piece, by plated film, blue laser is allowed to reflect, and green fluorescence and yellow fluorescence is allowed to transmit.
And the three coloured light after closing light reaches filter wheel 30, as previously mentioned, filter wheel includes optical filter, it can be to glimmering
Light carries out colour filter, improves the purity of fluorescence, while in embodiments of the present invention, the incidence surface and light-emitting surface of the transmission area of filter wheel
It is both provided with micro-structure, dissipation spot can be diffused while being transmitted to blue laser.
Specifically, as shown in Figure 4 A, filter wheel 30 includes green light optical filter 31 for filtering green fluorescence, Red lightscreening plate
32 obtain red fluorescence and transmission area 33 for filtering yellow fluorescence, and transmission area 33 can be diffusion sheet material, or
The thickness of frosted glass, diffusion sheet or frosted glass is less than or equal to 0.7mm, i.e., using the diffusion sheet or hair glass under the conditions of prior art
Glass can be processed to be formed.
Diffusion sheet is scatter-type diffusion sheet or diffractive diffusion sheet, and the transmitance of scatter-type diffusion sheet is due to diffraction type diffusion
Piece, but dissipation spot effect is slightly poorer than diffraction type diffusion sheet.
It is both provided with micro-structure in the incidence surface and light-emitting surface of diffusion sheet or frosted glass, wherein granular micro-structure degree is less than
Equal to 10um, it is less than the granularity of 40 ~ 50um of common diffusion sheet or so.Micro-structure can be formed by photoetching process, also may be used
Think the scattering particles layer coated in transmission area region surface, the purpose is to the both side surfaces in transmission area to form non-polished surface,
Diffusion can be formed to laser.
Such as Fig. 5 A, filter wheel transmission area cross-section structure enlarged diagram shown in Fig. 5 B, micro-structure can be multiple sawtooth
Shape raised either circular protrusions or other irregular figures, herein and are not specifically limited, the effect of above-mentioned micro-structure is
Scattering can be generated to incident laser, since reflecting surface is on-plane surface, to the angle for making the laser beam after reflection spread
There is diversity with direction, conducive to multiple random space phases are formed, to weaken the coherence of laser beam.
The incidence surface of transmission area and the microstructure aspects of light-emitting surface may be the same or different.
Above-mentioned micro-structure can show to be evenly distributed in transmission region, can also be non-uniform Distribution.In view of swashing
The Gaussian shaped profile feature of light, as shown in Figure 10, the luminous intensity being located near optical axis are larger, and coherence is also most strong, therefore this hair
In bright embodiment, the arrangement of the micro-structure of the incidence surface of the transmission area either micro-structure of light-emitting surface or two-sided micro-structure is set
It sets as follows：Circumferencial direction along filter wheel or the direction along filter wheel rotation are in close to white-out row by dredging, such as Fig. 4 B institutes
Show.To which when laser facula exposes to transmission area micro-structure surface, relatively intensive microstructure area can be to laser facula
Optical axis near the larger beam section of energy proportion carry out the diffusion of stronger degree, improve the efficiency of eliminating coherence, it is relatively dilute
Thin microstructure area can have certain dispersion angle and energy to account for smaller beam section and also carry out laser facula
A degree of diffusion weakens the phase of laser beam to reach the relatively homogenized effect of diffusion effect to entire laser beam
Dryness.
In embodiments of the present invention, since the incidence surface of transmission area and light-emitting surface are provided with micro-structure, to which laser exists
It is spread twice when transmiting the region, wherein it is assumed that after the diffusion of incidence surface, degree of divergence a, by light-emitting surface
Diffusion after, degree of divergence b, then after across entire transmission area micro-structure, the degree of divergence of laser beam is c, three
Approximation meets：。
The incidence surface of transmission area and the micro-structure arrangement density degree of light-emitting surface may be the same or different.
In embodiments of the present invention, by the way that the incidence surface of the transmission area of filter wheel and light-emitting surface are respectively provided with micro-structure, from
And the transmission region is equivalent to the diffusion sheet of a piece of movement, laser can be by the micro- of the surface in incident transmission area incidence surface
Structure is diffused, and generates a certain number of random phases spatially to laser beam, the generation of random phase can destroy
Interference condition can weaken the coherence of laser, and when being projected from the light-emitting surface of transmission area, can be arranged on out again
The micro-structure of smooth surface is diffused, and again results in the generation of random phase, further weakens the coherence of laser, to pass through
One component, can be spread twice, compared with the prior art in individually spread chip architecture, to the diffusion of light beam and
Eliminating coherence effect is optimized and is improved.
And by being directed to gaussian laser type characteristic distributions, set the micro-structure at least one face of laser transmission area to
Along filter wheel circumferencial direction or along filter wheel rotation direction be in by dredge it is close to white-out row, can be attached to laser beam axis
Closely, coherence carries out the diffusion of stronger degree compared with strong and larger energy proportion beam section, improves the efficiency of eliminating coherence.
By above-mentioned technical proposal, finally make to form multiple independent speckle patterns in the picture of light source projects formation, profit
It can be weakened significantly with the speckle effect of the integral action of human eye, picture.To which laser is while by filter wheel transmission output
Dissipation spot can also be carried out, the functional diversities of colour filter wheel component are made.
Simultaneously as filter wheel can carry out dissipation spot to laser, it can save or reduce in light source framework individually
Dissipation spot component use, be conducive to light source framework simplification and light source volume compression.
Embodiment two
The embodiment of the present invention two proposes a kind of light source, as shown in fig. 6, in the present embodiment, laser sends out two kinds of face
The laser of color is that blue laser 11 sends out blue laser respectively, and red laser 12 sends out red laser, and two kinds of laser pass through
Conjunction beam is carried out into closing light component 40 after focusing shrink beam, closing light component 40 can be dichroic piece, be transmissive to blue laser simultaneously
Reflect red laser.
It closes blue laser and red laser after beam and is incident to fluorescent wheel 20, accordingly, fluorescent wheel 20 includes phosphor region
And transmission area（It is not shown in figure）, wherein phosphor region includes green emitting phosphor, since the wavelength of blue laser is shorter, uses blue
Laser sends out green fluorescence as laser pumping light, excitation green emitting phosphor.The transmission area of fluorescent wheel 20 specifically includes blue and swashs
Transmitance region and red laser transmission area.According to blue laser and red laser light sequential and fluorescent wheel 20 revolves
The position turned, blue laser and red laser are incident to the different zones on 20 surface of fluorescent wheel respectively.Specifically, work as blue laser
When device is lighted, a blue laser part exposes to green emitting phosphor region, and excitation generates green fluorescence, in the present embodiment, glimmering
Halo 20 is transmission-type fluorescent wheel, and reflectance coating is additionally provided in green emitting phosphor area surfaces, can reflect the incident surface
Fluorescence, so that fluorescence is back to the fluorescent wheel back side, projected along the direction consistent with laser light incident direction.And according to fluorescent wheel
The change of rotation position, a part of blue laser pass through the blue laser transmission area of fluorescent wheel 20, are projected from 20 back side of fluorescent wheel.
When red laser is lighted, the rotation of fluorescent wheel 20 to red laser transmits zone position, and red laser passes through the transmission region
And it is projected from the fluorescent wheel back side.To which red laser, blue laser and green fluorescence are projected from 20 back side of fluorescent wheel successively.
The three coloured light being emitted from 20 back side of fluorescent wheel sequentially enters filter wheel 30 again, specifically, as shown in fig. 7, filter wheel
30 include green filter area 31, blue laser transmission area 32 and red laser transmission area 33, wherein 32 He of blue laser transmission area
The incidence surface and light-emitting surface of red laser transmission area 33 are both provided with micro-structure, the micro-structure of specific each laser transmission area
Shape, arrangement rule can be found in be illustrated in the embodiment of the present invention one.
The double-side micro structure of blue laser transmission area 32 can be uniformly distributed, and can also be to be uniformly distributed on one side, another
Face non-uniform Distribution, such as according to the density arrangement mode described in embodiment one.
For red laser transmission area 33, it is contemplated that human eye is higher to the speckle sensitivity of red laser, therefore, red
The microstructured ar-rangement of color laser transmission area is set as dispersion angle and is more than blue laser transmission area, so as to balanced two kinds of color laser
Speckle degree.
Specifically, in embodiments of the present invention, red laser transmission area 33 may include multiple sub- transmission areas, and multiple sons are thoroughly
It can be sector to penetrate area, can also be multiple arc sections that laser facula passes through.The micro-structure arrangement of multiple sub- transmission areas can be with
It is in close to thin arrangement mode by dredging along filter wheel circumferencial direction, positioned at the sub- transmission area of intermediate region in multiple sub- transmission areas
Dispersion angle and multiple son of the sub- transmission area for being located at two side areas to red laser are more than to the dispersion angle of red laser
It is more than the area of the sub- transmission area positioned at two side areas in transmission area positioned at the area of the sub- transmission area of intermediate region, can be directed to
Red laser Gaussian shaped profile feature largely dissipates the light beam near optical axis, improves the degree and effect of eliminating coherence
Rate.
And the micro-structure in two faces of blue laser transmission area can also be with reference to the setting rule of red laser transmission area
It is configured, does not limit herein.
The light source provided in the embodiment of the present invention two is two-color laser light source, and accordingly, fluorescent wheel and filter wheel are respectively provided with
There is two-color laser transmission area, blue laser transmission area and red laser transmission area specifically, on filter wheel is respectively set, and will be red
Color laser transmission area is more than blue laser transmission area to the dispersion angle of blue laser, Neng Gouti to the dispersion angle of red laser
Height is to the eliminating coherence effect of red laser, to mitigate the speckle effect of red laser, according to human eye to red laser speckle and
The difference of blue laser speckle susceptibility achievees the effect that the laser speckle degree of two kinds of colors is consistent, to which the present invention is real
A scheme is applied while can improve laser dissipation spot effect, additionally it is possible to take into account the consistent of two kinds of color laser speckle degree
Property, so that image picture quality is stablized, improves user and watch impression value.
Two technical solution of the embodiment of the present invention is the remodeling to one scheme of embodiment, equally also with having in embodiment one
Details are not described herein for identical part in beneficial effect, with embodiment one.
Embodiment three
The embodiment of the present invention three proposes a kind of light source, as shown in figure 8, from implement two in unlike, the present invention implementation
Example three provide light source, the red laser that red laser 12 is sent out no longer directive fluorescent wheel 20, but with blue laser 11
The blue laser light path sent out is arranged in parallel, and accordingly, in the embodiment of the present invention three, a blue need to be arranged in fluorescent wheel 20
Laser transmission area is emitted blue laser and green fluorescence from its back side, and reaches closing light component 40 successively.Red laser is by poly-
Defocused also incident closing light component 40, three coloured light incident filter wheel 30 after closing light, in the embodiment of the present invention three, filter wheel 30
Setting can be found in embodiment two in filter wheel subregion, also include blue laser transmission area and red laser transmission area, wherein
Unlike embodiment two, blue laser transmission area or the incidence surface of red laser transmission area or two transmission areas and go out
The micro-structure setting direction of smooth surface is at an angle.
Specifically, by taking blue laser transmission area as an example, for example, the incidence surface of blue laser transmission area micro-structure and light extraction
The micro-structure in face is as shown in Figure 4 A, cross section be triangle or V-arrangement, can be by the micro-structure of incidence surface along the circle of filter wheel
Circumferential direction or direction of rotation arrangement, filter wheel is such as carried out longitudinal profile, then obtained such as Fig. 4 A by direction 2 as shown in Figure 9 B
Shown shape.And by the micro-structure of light-emitting surface along filter wheel rotation center be the center of circle, arranged by its radial direction,
Direction 1 as shown in Figure 9 A such as carries out carrying out section perpendicular to filter wheel radial direction along filter wheel, then obtains figure as indicated at 11
Shape.
By said program it is found that due to incidence surface and light-emitting surface micro-structure setting direction at an angle, such as hang down
Straight or near normal, then the coplanar laser illumination or reflecting surface of micro-structure are also correspondingly at an angle, such as it is vertical or
Person's near normal, in this way, diversity is easily presented to the dispersal direction and dispersion angle of laser in the micro-structure in two faces, for laser
For light beam, the identical probability of space phase diffuseed to form twice just reduces, will to the quantity of random phase pattern
Increase, be conducive to the eliminating coherence of laser, the picture speckle that thus light source is formed can homogenize decrease within the human eye integration response time, reach
To the effect of dissipation spot.
Similarly, the micro-structure of red laser transmission area can also be with reference to setting.
And transmission area incidence surface is identical with the microstructure aspects of light-emitting surface in above-mentioned example, in another specific implementation,
It can also be different.
The light source provided in the embodiment of the present invention three is also a kind of two-color laser light source, due on the basis of embodiment two,
The micro-structure of blue laser transmission area or the incidence surface and light-emitting surface of red laser transmission area or the two transmission areas is arranged
For orientation difference, so as to increase the diversity of laser dispersal direction and angle, multiple random phase patterns are generated, into
One step is conducive to the eliminating coherence of laser so that the dissipation spot effect promoting of light source.
In said one of the present invention or multiple embodiments, by the transmission area in filter wheel by by the transmission area of filter wheel
Incidence surface and light-emitting surface be respectively provided with micro-structure, to which the transmission region is equivalent to the diffusion sheet of a piece of movement, laser is entering
The micro-structure that surface can be arranged on when penetrating transmission area incidence surface and light-emitting surface is diffused, to pass through a component, energy
Enough spread twice, compared with the prior art in individually spread chip architecture, the diffusion to light beam and eliminating coherence effect
Optimized and is improved.
And by being directed to gaussian laser type characteristic distributions, set the micro-structure at least one face of laser transmission area to
Along filter wheel circumferencial direction or along filter wheel rotation direction be in by dredge it is close to white-out row, can be attached to laser beam axis
Closely, coherence carries out the diffusion of stronger degree compared with strong and larger energy proportion beam section, improves the efficiency of eliminating coherence.
And by being distributed setting blue laser transmission area and red laser in the colour filter wheel construction of two-color laser light source
Transmission area, and red laser transmission area is set, blue laser transmission area is more than to blue laser to the dispersion angle of red laser
Dispersion angle can improve the eliminating coherence effect to red laser, reach the consistent effect of the laser speckle degree of two kinds of colors
Fruit.
And it is different by the way that the orientation of laser transmission area incidence surface and the micro-structure of light-emitting surface is arranged, for example be in
The angle of approximate right angle can increase the dispersal direction of laser and the diversity of angle, multiple random phase patterns be generated, into one
Step is conducive to the eliminating coherence of laser so that the dissipation spot effect promoting of light source.
To pass through above-mentioned technical proposal, finally make to form multiple independent speckle patterns in the picture of light source projects formation
Sample, using the integral action of human eye, the speckle effect of picture can weaken significantly.To which laser is by filter wheel transmission output
While can also carry out dissipation spot, make the functional diversities of colour filter wheel component.
Simultaneously as filter wheel can carry out dissipation spot to laser, it can save or reduce in light source framework individually
Dissipation spot component use, be conducive to light source framework simplification and light source volume compression.
Example IV
The embodiment of the present invention four provides a kind of laser projection device, as shown in figure 12, including light source 1, ray machine 2, camera lens 3
And screen 4, specifically, the light source that light source 1 can be in above-mentioned implementation one or embodiment two or embodiment three, light source 1 is that ray machine 2 carries
For illumination, the core component of ray machine 2 is DMD, and DMD incident camera lenses 3 after being modulated to light swash in embodiments of the present invention
Optical projection device is ultrashort burnt laser projection tv, then camera lens 3 is ultrashort zoom lens, and camera lens 3 projects image after imaging
Onto screen 4, projected picture is formed, is watched for user.
In a kind of specific implementation, as shown in figure 13, the light source in Application Example 3, the filtered wheel of three primary colours light is 30 defeated
Enter optical wand 50 after going out, optical wand 50 is sent into the lighting system of ray machine 2 after light beam being homogenized as even smooth component（Do not show in figure
Go out）, lighting system projects light beams upon on dmd chip 60, and through overdriving, DMD60 exports modulated light beam to ultrashort coke
Camera lens 70 is imaged, and projection screen is finally projected to（It is not shown in figure）Or the picture of ornamental is formed on other media.
Laser projection device provided by the invention, colour filter wheel component therein can either timing export three primary colours, simultaneously
Micro-structure is also respectively provided with by the incidence surface and light-emitting surface in transmission area, preferable dissipation spot is carried out to laser, improves projection
Picture quality, and, due to the multifunction of filter wheel, it can save or reduce the spot component that individually dissipates in light source framework
It uses, is conducive to the simplification of light source framework, the compression of light source volume, and be conducive to the miniaturization of laser projection device.
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 (11)
1. a kind of light source, including laser send out the laser of at least one color；Fluorescent wheel, for receiving the laser irradiation
And generate the fluorescence of at least one color；Filter wheel, including color filter regions and transmission area, wherein the color filter regions are for receiving institute
It states the fluorescence of at least one color and filters output, the transmission area is used to transmit the laser of at least one color, special
Sign is：
The incidence surface and light-emitting surface of the transmission area are both provided with micro-structure；
The setting direction of the micro-structure of the incidence surface and light-emitting surface is vertical.
2. light source according to claim 1, which is characterized in that the incidence surface of the transmission area or the micro-structure edge of light-emitting surface
The circumferencial direction of the filter wheel is in close to white-out row by dredging.
3. light source according to claim 1 or 2, which is characterized in that the transmission area is diffusion sheet or frosted glass material.
4. light source according to claim 1 or 2, which is characterized in that the granular micro-structure degree is less than or equal to 10 μm.
5. light source according to claim 3, which is characterized in that the micro-structure is formed by photoetching process.
6. light source according to claim 3, which is characterized in that the micro-structure is that scattering particles coating is formed.
7. light source according to claim 1, which is characterized in that the laser sends out blue laser, the transmission area packet
Include blue light transmission area.
8. light source according to claim 1, which is characterized in that the laser sends out blue laser and red laser, institute
It includes blue light transmission area and red transmission area to state transmission area.
9. light source according to claim 1, which is characterized in that the incidence surface of the transmission area and the micro-structure of light-emitting surface point
It is not arranged along the radial direction and circumferencial direction of the filter wheel.
10. light source according to claim 3, which is characterized in that the diffusion sheet or frosted glass thickness are less than or equal to
0.7mm。
11. a kind of laser projection device, including light source, ray machine, camera lens and screen, which is characterized in that the light source is above-mentioned
Any light sources of 1-10 are weighed, the light source provides illumination for the ray machine, and is modulated through the ray machine and enter the camera lens
It is imaged and projects on the screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510948990.6A CN105573031B (en) | 2015-12-18 | 2015-12-18 | A kind of light source and laser projection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510948990.6A CN105573031B (en) | 2015-12-18 | 2015-12-18 | A kind of light source and laser projection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105573031A CN105573031A (en) | 2016-05-11 |
| CN105573031B true CN105573031B (en) | 2018-09-21 |
Family
ID=55883327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510948990.6A Active CN105573031B (en) | 2015-12-18 | 2015-12-18 | A kind of light source and laser projection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105573031B (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107885021A (en) * | 2016-09-30 | 2018-04-06 | 海信集团有限公司 | A kind of LASER Light Source and laser projection device |
| CN106773485A (en) * | 2016-12-29 | 2017-05-31 | 海信集团有限公司 | A kind of laser projection system |
| CN106647127A (en) * | 2016-12-29 | 2017-05-10 | 海信集团有限公司 | Laser projection system |
| CN106707671A (en) * | 2016-12-29 | 2017-05-24 | 海信集团有限公司 | Laser projection system |
| CN106873293A (en) * | 2016-12-30 | 2017-06-20 | 中国华录集团有限公司 | A kind of laser projection system for reducing speckle |
| CN106707672A (en) * | 2016-12-30 | 2017-05-24 | 中国华录集团有限公司 | Projector with multi-angle atomization diffusion sheet optical structure |
| CN109426051A (en) * | 2017-08-21 | 2019-03-05 | 深圳光峰科技股份有限公司 | Light-source system and projection arrangement |
| CN107797372A (en) * | 2017-11-17 | 2018-03-13 | 四川长虹电器股份有限公司 | A kind of two-color laser light source optical automotive engine system |
| CN109870873B (en) * | 2017-12-05 | 2022-04-22 | 青岛海信激光显示股份有限公司 | Wavelength conversion device, light source device and projection system |
| CN109991802A (en) * | 2018-01-03 | 2019-07-09 | 深圳光峰科技股份有限公司 | Light-source system and projection device |
| CN108398804B (en) * | 2018-03-28 | 2023-07-25 | 四川长虹电器股份有限公司 | Laser speckle eliminating light path and laser projection light source system |
| CN109254415B (en) * | 2018-10-31 | 2020-07-28 | 四川长虹电器股份有限公司 | Laser speckle eliminating device for multi-dimensional inner engraving and outer diffusion |
| CN109358467B (en) * | 2018-11-16 | 2023-01-10 | 青岛海信激光显示股份有限公司 | Laser light source, light source mode switching method and laser projection equipment |
| CN114063372A (en) | 2020-07-30 | 2022-02-18 | 中强光电股份有限公司 | Filter module and projection device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520569A (en) * | 2011-12-02 | 2012-06-27 | 深圳市光峰光电技术有限公司 | Light source device and projection device using same |
| CN103186021A (en) * | 2011-12-27 | 2013-07-03 | 台达电子工业股份有限公司 | Illumination system and wavelength-transforming device thereof |
| CN103777447A (en) * | 2012-10-17 | 2014-05-07 | 深圳市绎立锐光科技开发有限公司 | Light source system, wavelength conversion device and relevant projection system |
| CN104880896A (en) * | 2012-03-19 | 2015-09-02 | 深圳市光峰光电技术有限公司 | Lighting device and projection device |
| CN105093794A (en) * | 2015-06-03 | 2015-11-25 | 海信集团有限公司 | Double-color laser light source |
| CN105116675A (en) * | 2015-06-03 | 2015-12-02 | 海信集团有限公司 | Laser source and projection display device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5842162B2 (en) * | 2011-03-23 | 2016-01-13 | パナソニックＩｐマネジメント株式会社 | Light source device and image display device using the same |
| JP2014160227A (en) * | 2013-01-28 | 2014-09-04 | Panasonic Corp | Illumination device and video display apparatus |
-
2015
- 2015-12-18 CN CN201510948990.6A patent/CN105573031B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520569A (en) * | 2011-12-02 | 2012-06-27 | 深圳市光峰光电技术有限公司 | Light source device and projection device using same |
| CN103186021A (en) * | 2011-12-27 | 2013-07-03 | 台达电子工业股份有限公司 | Illumination system and wavelength-transforming device thereof |
| CN104880896A (en) * | 2012-03-19 | 2015-09-02 | 深圳市光峰光电技术有限公司 | Lighting device and projection device |
| CN103777447A (en) * | 2012-10-17 | 2014-05-07 | 深圳市绎立锐光科技开发有限公司 | Light source system, wavelength conversion device and relevant projection system |
| CN105093794A (en) * | 2015-06-03 | 2015-11-25 | 海信集团有限公司 | Double-color laser light source |
| CN105116675A (en) * | 2015-06-03 | 2015-12-02 | 海信集团有限公司 | Laser source and projection display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105573031A (en) | 2016-05-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105573031B (en) | A kind of light source and laser projection device | |
| CN105573030B (en) | A kind of light source and laser projection device | |
| CN105093794B (en) | Double-color laser light source | |
| CN105116675B (en) | A kind of LASER Light Source and projection display apparatus | |
| CN105093795B (en) | A kind of two-color laser light source | |
| CN105190432B (en) | Light supply apparatus and projection-type image display device | |
| US8562146B2 (en) | Light source device and image display apparatus | |
| CN102566233B (en) | Light supply apparatus and projection-type image display device | |
| CN106597785B (en) | A kind of fluorescent wheel and two-color laser light source | |
| CN208752383U (en) | Lighting system and projection arrangement | |
| CN101682789B (en) | Method for image projection, image projection apparatus and image projection screen | |
| CN106569379B (en) | A kind of laser dissipation spot light path and two-color laser light source, three color laser light sources | |
| CN109521633A (en) | Lighting system and projection arrangement | |
| CN108303839B (en) | A kind of laser projection lighting source and its optical projection system | |
| CN104656354A (en) | Illumination system and projection apparatus | |
| CN102508401B (en) | Light source device and projector using same | |
| CN108646510A (en) | A kind of compact projection light source | |
| CN104870887A (en) | Light source device | |
| CN206671744U (en) | A kind of projection arrangement | |
| CN107193177A (en) | A kind of light-source system and its projection arrangement | |
| CN209373341U (en) | Filtration module and projection arrangement | |
| CN109407451A (en) | Two-color laser light source and laser projection | |
| CN106773490A (en) | Optical texture, optical system and optical means for eliminating laser projection speckle | |
| CN104570381A (en) | Projection display light source and projection display system | |
| CN108445700A (en) | Laser projection light source and laser projection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |