CN105573030B - A kind of light source and laser projection device - Google Patents
A kind of light source and laser projection device Download PDFInfo
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- CN105573030B CN105573030B CN201510948988.9A CN201510948988A CN105573030B CN 105573030 B CN105573030 B CN 105573030B CN 201510948988 A CN201510948988 A CN 201510948988A CN 105573030 B CN105573030 B CN 105573030B
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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
- G03B21/14—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
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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
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/208—Homogenising, shaping of the illumination light
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
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- Optics & Photonics (AREA)
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Abstract
The invention discloses a kind of light source, including the first colour wheel and the second colour wheel, the first colour wheel includes phosphor region and the first transmission area；Second colour wheel, including color filter regions and the second transmission area, micro-structural is provided with by the incidence surface and exiting surface in the first transmission area or the second transmission area, dissipation spot can also be diffused to laser while being transmitted to laser, make the functional diversities of the firstth or second colour wheel part, and the use of single dissipation spot part can be saved or reduced in light source framework, the compression of simplification and light source volume beneficial to light source framework.Present invention also offers a kind of laser projection device, 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 source of Projection Display.
Background technology
LASER Light Source has and highlighted, efficiently, the life-span 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 at present in industry, the first colour wheel can be used to produce the fluorescence in addition to laser color, and
Be collectively forming three primary colours with laser, and the colour filter for passing through the second colour wheel improves the purity of fluorescence, final timing output purity compared with
High three primary colours, improved in this, as the picture lightness that light source projects go out, colour gamut is good.In the prior art, a kind of first colour wheel
Structure such as Fig. 1 examples, including phosphor region 11 and transmission area 12, wherein phosphor region 11 be coated with least one fluorescent material, such as
For green emitting phosphor and yellow fluorescent powder, light irradiation can be excited successively and excites the fluorescence for producing corresponding color.Transmission area 12 is logical
Often it is clear glass, for transmitting blue laser.Enter the second colour wheel part after above-mentioned fluorescence and laser closing light.Prior art
In, a kind of second colour wheel part multiple optical filters as shown in Fig. 2 be made up of, including color filter regions 21,22 and transmission area 23.Colour filter
Area 21 can be green color filter, and color filter regions 22 can be feux rouges optical filter, so as to glimmering to green fluorescence and yellow respectively
Light is filtrated to get the higher green glow and feux rouges of purity, 23 generally transparent glass of transmission area, for transmitting blue laser.First color
The colour wheel 02 of wheel 01 and second keeps synchronous rotary, the output three primary colours light of timing, ultimately forms the projected pictures of bright colors.
The content of the invention
The invention discloses a kind of light source, including laser, the first colour wheel and the second colour wheel, by the first or second color
The incidence surface and exiting surface of the laser transmission area of wheel are provided with micro-structural, can play diffusion to the laser for transmiting the region and disappear
The effect of speckle so that the functional diversities of the first or second colour wheel.
The present invention seeks to what is be achieved through the following technical solutions：
A kind of light source, including laser, send the laser of at least one color；First colour wheel, including phosphor region and first
Transmission area, phosphor region are used to receive the fluorescence that laser irradiates and produces at least one color, and the first transmission area is used for transmission laser；
Second colour wheel, including color filter regions and the second transmission area, color filter regions are used for the fluorescence for receiving at least one color and colour filter output, the
Two transmission areas are used for the laser for transmiting at least one color, wherein, the incidence surface and light extraction of the first transmission area or the second transmission area
Face is provided with micro-structural；
Further, the circumferencial direction of the incidence surface of the first transmission area and/or the micro-structural of exiting surface along the first colour wheel is in
It is close to white-out row by dredging；And/or
The circumferencial direction of the incidence surface of second transmission area and/or the micro-structural of exiting surface along the second colour wheel be in by dredge it is close to
White-out arranges.
Further, the first transmission area or the second transmission area are diffusion sheet or frosted glass material.
Further, granular micro-structure degree is less than or equal to 10 μm.
Further, micro-structural is formed by photoetching process.
Further, micro-structural is that scattering particles coating is formed.
Further, laser sends blue laser, and the first transmission area includes blue light transmission area, and the second transmission area is indigo plant
Transmitance region.
Or further, laser sends blue laser and red laser, the first transmission area transmits including the first blue light
Area and the first red transmission area, and the second transmission area includes the second blue light transmission area and the second red transmission area.
Further, the micro-structural of the incidence surface of the first transmission area and exiting surface respectively along the first colour wheel radial direction and
Circumferencial direction arranges；And/or
The incidence surface of second transmission area and the micro-structural of exiting surface are respectively along the radial direction and circumferencial direction of the second colour wheel
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 scheme.
Technical scheme of the embodiment of the present invention, at least has the following technical effect that or advantage：
The light source that technical scheme of the embodiment of the present invention provides, including laser, the first colour wheel and the second colour wheel, wherein, the
The incidence surface and exiting surface of laser transmission area in color wheel or the second colour wheel are provided with micro-structural, with first or second
Colour wheel Periodic Rotating, laser can be diffused in the corresponding colour wheel transmission area incidence surface of incidence by the micro-structural on the surface,
A number of random phase spatially is produced to laser beam, the generation of random phase can destroy interference condition, can be with
Weaken the coherence of laser, and from during the exiting surface injection of corresponding colour wheel transmission area, exiting surface can be arranged on again
Micro-structural be diffused, again result in the generation of random phase, further weaken laser coherence, finally throw light source
Penetrate in the picture to be formed and form multiple independent speckle patterns, using the integral action of human eye, the speckle effect of picture can be significantly
Weaken.So as to which laser while the first colour wheel or the transmission output of the second colour wheel by that can also carry out dissipation spot so that first
Colour wheel with wavelength convert in addition to being acted on, additionally it is possible to dissipation spot, or the second colour wheel are carried out to laser except making with colour filter
With outer, additionally it is possible to carry out dissipation spot to laser so that the first colour wheel or the second colour wheel multifunction.
Simultaneously as the first colour wheel or the second colour wheel of such scheme can carry out dissipation spot to laser, in light source shelf
The use of single dissipation spot part can be saved or reduced in structure, the pressure of simplification and light source volume beneficial to light source framework
Contracting.
The laser projection device that technical scheme of the embodiment of the present invention proposes, using the light source of above-mentioned technical proposal, Neng Goushi
Sequence exports three primary colours, while also carries out preferable dissipation spot to laser, improves projected image quality, and, can save or
The individually use of dissipation spot part in light source framework is reduced, beneficial to the simplification of light source framework, the compression of light source volume, and is beneficial to
The miniaturization of projection arrangement.
Brief description of the drawings
Fig. 1 is a kind of planar structure schematic diagram of first colour wheel in the prior art；
Fig. 2 is a kind of planar structure schematic diagram of second colour 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 subregion schematic diagram of the second colour wheel in the embodiment of the present invention one；
Fig. 4 B are the another plane partitioned organization schematic diagram of the second colour wheel in the embodiment of the present invention one；
Fig. 5 A, 5B are respectively the cross sectional shape schematic diagram of micro-structural in the embodiment of the present invention one；
Fig. 6 is the plane subregion schematic diagram of the first colour wheel in the embodiment of the present invention two；
Light source configuration diagram in Fig. 7 embodiment of the present invention three；
Fig. 8 is the plane subregion schematic diagram of the first colour wheel in the embodiment of the present invention three；
Fig. 9 is the plane subregion schematic diagram of the second colour wheel in the embodiment of the present invention four；
Figure 10 is the light source configuration diagram in the embodiment of the present invention five；
Figure 11 A, 11B are respectively the orientation schematic diagram of micro-structural in the embodiment of the present invention five；
Figure 12 is the Gaussian shaped profile schematic diagram of laser；
Figure 13 is the horizontal cross-section structure diagram of the second colour wheel in the embodiment of the present invention five；
Figure 14 is laser projection device configuration diagram in the embodiment of the present invention six；
Figure 15 is a specific implementation structural representation of laser projection device in the embodiment of the present invention six.
Embodiment
In order that the object, technical solutions and advantages of the present invention are clearer, the present invention is made below in conjunction with accompanying drawing into
One step it is described in detail, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole implementation
Example.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made
All other embodiment, belongs to the scope of protection of the invention.
Below in conjunction with accompanying drawing, technical scheme 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, the laser light incident sent including laser 10, laser 10
First colour wheel 20, with the Periodic Rotating of the first colour wheel, the receiving portion laser of the first colour wheel 20 irradiate and produce fluorescence and
The laser of transmissive portion laser, fluorescence and transmission incident second colour wheel 30 after the closing light of closing light part 40, by the second colour wheel 30
After colour filter and transmission, the output three primary colours light of timing, and eventually enter into optical wand 50 and homogenized, provide photograph for x ray machine part
It is bright.
Specifically, laser 10 can be one group, or it is multigroup, for example can be two groups of vertical arrangement, and lead to
Cross light combination mirror piece and synthesize a branch of outgoing, in the present embodiment, laser 10 sends blue laser.
Because the beam area that laser is sent is larger, it is necessary to become the light for meeting fluorescence excitation requirement by beam shaping
Spot, as shown in figure 3, laser beam also carries out shrink beam by telescopic system 11 so that the facula area of laser diminishes.
In the present embodiment, the first colour wheel 20 includes phosphor region and the first transmission area, and wherein phosphor region includes green fluorescence
Powder and yellow fluorescent powder, phosphor region and the first transmission area each along the first colour wheel 20 excircle be distributed, blue laser hot spot according to
Secondary irradiation outer circumferential area, can excite corresponding phosphor area to produce green fluorescence and yellow fluorescence, Yi Jicong successively
First transmissive region is gone out.In a specific implementation, the first colour wheel 20 be reflective fluorescent wheel, is excited caused fluorescence by the
The aluminium base mirror-reflection of color wheel, projected along with laser light incident direction in opposite direction, and reach closing light part 40, blueness swashs
After light transmission by multiple lens sets into relaying loop return again to the front of the first colour wheel 20, also converge to closing light part
40, specifically, closing light part 40 can be dichroic piece, pass through plated film, it is allowed to blue laser reflect, and allow green fluorescence and
Yellow fluorescence transmits.
And the three coloured light after closing light reaches the second colour wheel 30, as it was previously stated, the second colour wheel includes optical filter, can
Colour filter is carried out to fluorescence, improves the purity of fluorescence, while in embodiments of the present invention, the second transmission area of the second colour wheel enters light
Face and exiting surface are provided with micro-structural, and dissipation spot can be diffused while being transmitted to blue laser.
Specifically, as shown in Figure 4 A, the second colour wheel 30 includes green glow optical filter 31 for filtering green fluorescence, red filter
Piece 32 obtains red fluorescence, and the second transmission area 33 for filtering yellow fluorescence, and the second transmission area 33 can be diffusion sheet material
Matter, or the thickness of frosted glass, diffusion sheet or frosted glass is less than or equal to 0.7mm, i.e., using existing process under the conditions of
Diffusion sheet or frosted 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.
Micro-structural is provided with the incidence surface and exiting surface of diffusion sheet or frosted glass, wherein, granular micro-structure degree is less than
Equal to 10um, less than 40 ~ 50um of common diffusion sheet or so granularity.Micro-structural 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 surface in transmission area to form non-polished surface,
Diffusion can be formed to laser.
Such as Fig. 5 A, second colour wheel the second transmission area cross-section structure enlarged diagram shown in Fig. 5 B, micro-structural can be more
Individual sawtooth projection, either circular protrusions or other irregular figures, herein and are not specifically limited, above-mentioned micro-structural
Effect is can to produce scattering to the laser of incidence, because reflecting surface is on-plane surface, so that the laser beam diffusion after reflection
Angle and direction there is diversity, beneficial to multiple random space phases are formed, to weaken the coherence of laser beam.
The incidence surface of second transmission area and the microstructure aspects of exiting surface can be with identical, can also be different.
Above-mentioned micro-structural can show to be evenly distributed in the second transmission region or non-uniform Distribution.Consider
To the Gaussian shaped profile feature of laser, as shown in Figure 10, the luminous intensity near optical axis is larger, and coherence is also most strong, therefore
In the embodiment of the present invention, by the micro-structural of the incidence surface of the second transmission area either micro-structural of exiting surface or two-sided micro-structural
Arrangement set it is as follows：Along the circumferencial direction of the second colour wheel or along the direction of the second colour wheel rotation in close to white-out by dredging
Row, as shown in Figure 4 B.So that when laser facula exposes to the second transmission area micro-structure surface, relatively intensive microstructure area
The diffusion of the stronger degree of beam section progress that can be larger to the energy proportion near the optical axis of laser facula, improves eliminating coherence
Efficiency, relatively sparse microstructure area can have certain dispersion angle and the less light of energy accounting to laser facula
Beam part also carries out a certain degree of diffusion, so as to reach the relatively homogenized effect of diffusion effect to whole laser beam, weakens
The coherence of laser beam.
In embodiments of the present invention, because the incidence surface and exiting surface of the second transmission area are provided with micro-structural, so as to swash
Light is spread twice when transmiting the region, wherein it is assumed that after the diffusion of incidence surface, degree of divergence a, by going out
After the diffusion of smooth surface, degree of divergence b, then after through whole transmission area micro-structural, the degree of divergence of laser beam is c,
Three is approximate to be met：。
The incidence surface of second transmission area and the micro-structural arrangement density degree of exiting surface can be with identical, can also be different.
In embodiments of the present invention, by the way that the incidence surface of the second transmission area of the second colour wheel and exiting surface are respectively provided with into micro- knot
Structure, so as to diffusion sheet of the transmission region equivalent to a piece of motion, laser can be by incident second transmission area incidence surface
The micro-structural on the surface is diffused, and a number of random phase spatially, the production of random phase are produced to laser beam
Life can destroy interference condition, can weaken the coherence of laser, and from the exiting surface of transmission area project when, can be again
The micro-structural for being arranged on exiting surface is diffused, and again results in the generation of random phase, further weakens the relevant spy of laser
Property, so as to pass through a part, it can be spread twice, compared to chip architecture is individually spread in the prior art, to light beam
Diffusion and eliminating coherence effect optimized and improved.
And by the way that for gaussian laser type characteristic distributions, the micro-structural at least one face of the second transmission area is arranged to
Along the second colour wheel circumferencial direction or along the second colour wheel rotation direction be in by dredge it is close to white-out row, can be to laser light
Axle nearby, coherence the diffusion of stronger degree is carried out compared with strong and beam section larger energy proportion, improve 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
With the integral action of human eye, the speckle effect of picture can weaken significantly.So as to which laser is by the same of the second colour wheel transmission output
When can also carry out dissipation spot, make the functional diversities of the second colour wheel part.
Simultaneously as the second colour wheel can carry out dissipation spot to laser, list can be saved or reduced in light source framework
The use of only dissipation spot part, the compression of simplification and light source volume beneficial to light source framework.
Embodiment two
The embodiment of the present invention two from embodiment one unlike, in embodiments of the present invention, as shown in fig. 6, the first color
The incidence surface and exiting surface of first transmission area 22 of wheel 20 are provided with micro-structural, can be while being transmitted to blue laser
It is diffused dissipation spot.
Wherein, the second transmission area of the first transmission area of the first colour wheel and the second colour wheel is to be used for transmission laser, two
Transmission area keeps synchronous with the rotation of two colour wheels, i.e., relative position is constant, and area size is also identical, simply in the first colour wheel,
First transmission area is generally arranged at the outer circumferential area of colour wheel, and the second transmission area is usually arranged as sector region in the second colour wheel,
Two transmission areas are more similar in structure setting, therefore for the set-up mode of the micro-structural of the first transmission area 22 in the first colour wheel,
Reference can be made to particular content in embodiment one, will not be repeated here.So as to which, the first colour wheel is while can carry out wavelength convert,
Dissipation spot can also be carried out to the laser of transmission, so that the first colour wheel multifunction, and beneficial to omission or reduce system
The use of middle dissipation spot part, beneficial to the reduction of light source framework volume.
Embodiment three
The embodiment of the present invention three proposes a kind of light source, as shown in fig. 7, in the present embodiment, laser sends two kinds of face
The laser of color, it is that blue laser 11 sends blue laser respectively, red laser 12 sends red laser, and two kinds of laser pass through
Conjunction beam is carried out into closing light part 40 after focusing shrink beam, closing light part 40 can be dichroic piece, be transmissive to blue laser simultaneously
Reflect red laser.
Close the blue laser after beam and red laser is incident to the first colour wheel 20, accordingly, as shown in figure 8, the first color
Wheel 20 includes the blue light transmission area 22 of phosphor region 21 and first, the first red transmission area 23（By sub- 231,232,233 groups of transmission area
Into）, wherein phosphor region 21 is included green emitting phosphor, because the wavelength of blue laser is shorter, swashed using blue laser as laser
Light is encouraged, excites green emitting phosphor to send green fluorescence.Sequential, and first are lighted according to blue laser and red laser
The position that colour wheel 20 rotates, blue laser and red laser are incident to the different zones on the surface of the first colour wheel 20 respectively.Specifically,
When blue laser is lighted, a blue laser part exposes to green emitting phosphor region, generation green fluorescence is excited, in this reality
Apply in example, the first colour wheel 20 is the colour wheel of transmission-type first, and reflectance coating is additionally provided with green emitting phosphor area surfaces, can be anti-
The fluorescence on the surface is penetrated, fluorescence is back to the first colour wheel back side, is projected along the direction consistent with laser light incident direction.With
And the change according to the first colour wheel rotation position, a part of blue laser pass through the blue laser transmission area of the first colour wheel 20, from
Project at the back side of first colour wheel 20.When red laser is lighted, the first colour wheel 20, which is rotated to red laser, transmits zone position, red
Laser projects through the transmission region and from the first colour wheel back side.So as to which red laser, blue laser and green fluorescence are successively
Projected from the back side of the first colour wheel 20.The second colour wheel 30 is sequentially entered again from the three coloured light of the back side of the first colour wheel 20 outgoing, by the
The colour filter and transmission of two colour wheels 30, timing output three primary colours.
In the embodiment of the present invention three, the first blue light transmission area 22, the incidence surface and exiting surface in the first red transmission area 23
Micro-structural is provided with, the shape of the micro-structural of specific each laser transmission area, arrangement rule can be found in the embodiment of the present invention one
Middle micro-structural sets explanation.
And first blue transmission area 22 double-side micro structure can be uniformly distributed or one side be uniformly distributed,
Another side non-uniform Distribution, such as according to the density arrangement mode described in embodiment one.
For the first red transmission area 23, 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 arranged to 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, the first red transmission area 23 can include more sub- transmission areas, and more height are saturating
It can be multiple arc sections that fan-shaped or laser facula passes through to penetrate area.It is shown in Figure 8, sub- transmission area can be included
231,232,233, the micro-structural arrangement of plurality of sub- transmission area can be in close to thin by dredging along the first colour wheel circumferencial direction
Arrangement mode, the sub- transmission area 232 in more sub- transmission areas positioned at intermediate region is more than position to the dispersion angle of red laser
It is located at middle area in the dispersion angle of 231,233 pairs of red lasers of sub- transmission area of two side areas, and more sub- transmission areas
The area of the sub- transmission area 232 in domain is more than the area of the sub- transmission area 231,233 positioned at two side areas, can be directed to red laser
Gaussian shaped profile feature is largely dissipated the light beam near optical axis, improves the degree and efficiency of eliminating coherence.
And first the micro-structural in two faces of blue light transmission area 22 can also be with reference to the setting in the first red transmission area 23
Rule is configured, and is not limited herein.
The light source provided in the embodiment of the present invention three is two-color laser light source, and accordingly, the first colour wheel and the second colour wheel are equal
Two-color laser transmission area is provided with, specifically, blue light transmission area and red transmission area be set respectively on the first colour wheel, and by feux rouges
Transmission area is more than dispersion angle of the blue light transmission area to blue laser to the dispersion angle of red laser, it is possible to increase red is swashed
The eliminating coherence effect of light；And according to gaussian laser characteristic distributions, more sub- transmission areas are divided into the first red transmission, respectively
Sub- transmission area micro-structural density arrangement according to by dredge it is close to dredge arranged, specific aim raising red laser coherence it is stronger
Beam component eliminating coherence effect, above measure can mitigate the speckle effect of red laser, according to human eye to red laser
The difference of speckle and blue laser speckle susceptibility, reach the consistent effect of the laser speckle degree of two kinds of colors, so as to this
Inventive embodiments scheme is while can improve laser dissipation spot effect, additionally it is possible to take into account two kinds of color laser speckle degree
Uniformity, make image picture quality stable, improve user and watch impression value.
The embodiment of the present invention three is based on identical part in embodiment one, with embodiment one and will not be repeated here.
Example IV
The embodiment of the present invention four from embodiment three unlike, as shown in figure 9, the second colour wheel 30 may particularly include green
Filter area 31, the second blue light transmission area 32 and the second red transmission area 33, wherein, the second blue light transmission area 32 and second is red saturating
The incidence surface and exiting surface for penetrating area 33 are provided with micro-structural, wherein in the second blue light transmission area 32 micro-structural set-up mode,
The set-up mode of the micro-structural in the second red transmission area 33 can be found in the first blue light transmission area 22 in embodiment three, and the first feux rouges is saturating
The set-up mode in area 23 is penetrated, its process and action effect are similar with embodiment three, will not be repeated here.
Embodiment five
The embodiment of the present invention five proposes a kind of light source, and as shown in Figure 10, unlike implementation two, the present invention is implemented
The light source that example five provides, the red laser that red laser 12 is sent no longer the first colour wheel of directive 20, but and blue laser
The 11 blue laser light paths sent be arranged in parallel, and accordingly, in the embodiment of the present invention five, the first colour wheel 20 need to set first
Blue light transmission area, blue laser and green fluorescence are emitted successively from its back side, and reach closing light part 40, wherein the first blue light is saturating
Penetrate the incidence surface in area and exiting surface is respectively provided with micro-structural, specifically, the set-up mode of micro-structural can be found in embodiment one or implement
Described in example three.
Red laser also incident closing light part 40 after over-focusing, three coloured light incident second colour wheel 30 after closing light,
In the embodiment of the present invention five, the setting of the second colour wheel 30 can be found in the subregion of the second colour wheel in example IV, also blue including second
Transmitance region and the second red transmission area, wherein from example IV unlike, the second blue light transmission area or the second feux rouges are saturating
Penetrate area or two transmission areas incidence surface and exiting surface micro-structural setting direction at an angle.
Specifically, by taking the second blue light transmission area as an example, such as the micro-structural and light extraction of the incidence surface of the second blue light transmission area
As shown in Figure 4 A, cross section is triangle or V-arrangement to the micro-structural in face, can be by the micro-structural of incidence surface along the second colour wheel
Circumferencial direction or direction of rotation arrangement, direction 2 as shown in Figure 11 B, such as by the second colour wheel progress longitudinal profile, then obtain as
Shape shown in Fig. 4 A.And by pivot of the micro-structural of exiting surface along the second colour wheel be the center of circle, carried out by its radial direction
Arrangement, direction 1 as shown in Figure 11 A, such as carry out carrying out section perpendicular to the second colour wheel radial direction along the second colour wheel, then obtain
The shape of figure as shown at 13.
From such scheme, due to the setting direction of incidence surface and the micro-structural of exiting surface at an angle, for example hang down
Straight or near normal, then the coplanar laser illumination or reflecting surface of micro-structural also correspondingly at an angle, such as it is vertical or
Diversity is easily presented to the dispersal direction and dispersion angle of laser in person's near normal, so, the micro-structural in two faces, for laser
For light beam, the space phase identical probability diffuseed to form twice just reduces, will so as to the quantity of random phase pattern
Increase, beneficial 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-structural in the second red transmission area can also be with reference to setting.
And transmission area incidence surface is identical with the microstructure aspects of exiting surface in above-mentioned example, in another specific implementation,
Can also be different.
It is also same for the scheme of the setting direction of above-mentioned laser transmission area incidence surface and exiting surface micro-structural at an angle
Sample is applied to the first blue light transmission area of the first colour wheel.
The light source provided in the embodiment of the present invention five, also it is a kind of two-color laser light source, due to by blue laser transmission area
Or the micro-structural of the incidence surface of red laser transmission area or the two transmission areas and exiting surface is arranged to orientation difference, from
And the diversity of laser dispersal direction and angle can be increased, multiple random phase patterns are produced, further disappearing beneficial to laser
It is relevant so that the dissipation spot effect promoting of light source.
In said one of the present invention or multiple embodiments, pass through the laser transmission area in the first colour wheel or the second colour wheel
In, the incidence surface of laser transmission area and exiting surface are respectively provided with micro-structural, so as to which the laser transmits region equivalent to a piece of fortune
Dynamic diffusion sheet, the micro-structural that laser can be arranged on surface in incident transmission area incidence surface and exiting surface are diffused,
So as to pass through a part, can be spread twice, compared to single diffusion chip architecture in the prior art, the expansion to light beam
The degree of dissipating and eliminating coherence effect are optimized and improved.
And by the way that for gaussian laser type characteristic distributions, the micro-structural at least one face of laser transmission area is arranged to
Along the first or second colour wheel circumferencial direction or 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 the first or second colour wheel structure of two-color laser light source be distributed set blue laser transmission area and
Red laser transmission area, and set red laser transmission area to be more than blue laser transmission area to indigo plant to the dispersion angle of red laser
The dispersion angle of color laser, it is possible to increase to the eliminating coherence effect of red laser, reach the laser speckle degree phase of two kinds of colors
Consistent effect.
And difference is set by the orientation to laser transmission area incidence surface and the micro-structural of exiting surface, for example be in
The angle of approximate right angle, by increasing capacitance it is possible to increase the dispersal direction of laser and the diversity of angle, produce multiple random phase patterns, enter one
Eliminating coherence of the step beneficial to laser so that the dissipation spot effect promoting of light source.
So as 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.So as to which laser is passing through the first colour wheel or second
Dissipation spot can also be carried out while colour wheel transmission output, makes the functional diversities of the second colour wheel part.
Simultaneously as the first colour wheel or the second colour wheel can carry out dissipation spot to laser, can be saved in light source framework
Or reduce the use of single dissipation spot part, the compression of simplification and light source volume beneficial to light source framework.
Embodiment six
The embodiment of the present invention six 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, light source 1 can be with above-mentioned implementation one or embodiment two or embodiment three or example IV or embodiment five
Light source, light source 1 be ray machine 2 provide illumination, the core component of ray machine 2 is DMD, and DMD is modulated rear incident camera lens to light
3, in embodiments of the present invention, laser projection device is ultrashort burnt laser projection tv, then camera lens 3 is ultrashort zoom lens, camera lens 3
Projected image onto after imaging on screen 4, form projected picture, watched for user.
In one kind is embodied, as shown in figure 13, the light source in Application Example five, three primary colours light is through the second colour wheel 30
Enter optical wand 50 after output, optical wand 50 is sent into the illuminator of ray machine 2 after light beam is homogenized as even smooth part（In figure not
Show）, illuminator is projected light beams upon on dmd chip 60, and through overdriving, DMD60 exports the light beam after modulation to ultrashort
Zoom lens 70 are imaged, and are finally projected to projection screen（Not shown in figure）Or the picture of ornamental is formed on other media
Face.
Laser projection device provided by the invention, the second colour wheel part therein can either timing output three primary colours, together
When micro-structural is also respectively provided with by the incidence surface and exiting surface in transmission area, preferable dissipation spot is carried out to laser, improves throwing
Shadow picture quality, and, due to the multifunction of the second colour wheel, it can save or reduce single dissipation spot portion in light source framework
The use of part, beneficial to the simplification of light source framework, the compression of light source volume, and it is beneficial to the miniaturization of laser projection device.
Similarly, laser projection device provided by the invention can also apply the light source in such as embodiment two or example IV,
So as to which the first colour wheel part is while wavelength convert is carried out, can also dissipation spot be carried out to the laser of transmission so that the first colour wheel
Multifunction, the use of single dissipation spot part in light source framework also can be saved or reduce, beneficial to the letter of light source framework
Change, the compression of light source volume, and beneficial to the miniaturization of laser projection device.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (11)
1. a kind of light source, including laser, send the laser of at least one color；First colour wheel, including phosphor region and first saturating
Area is penetrated, the phosphor region is used to receive the fluorescence that the laser irradiates and produces at least one color, and first transmission area is used
In the transmission laser；Second colour wheel, including color filter regions and the second transmission area, the color filter regions are used to receive at least one
The fluorescence of color and colour filter output, second transmission area are used for the laser for transmiting at least one color, it is characterised in that：
The incidence surface and exiting surface of first transmission area are provided with micro-structural；And/or
The incidence surface and exiting surface of second transmission area are provided with micro-structural；
And the degree of divergence c of laser beam meets after first transmission area or the second transmission area：, its
In, a, b are respectively the incidence surface and accordingly first transmission area or the by first transmission area or the second transmission area
The degree of divergence of the laser beam of the exiting surface of two transmission areas.
2. light source according to claim 1, it is characterised in that the incidence surface of first transmission area and/or exiting surface
Circumferencial direction of the micro-structural along first colour wheel is in close to white-out row by dredging；And/or
The circumferencial direction of the incidence surface of second transmission area and/or the micro-structural of exiting surface along second colour wheel is in by dredging
It is close to be arranged to white-out.
3. light source according to claim 1 or 2, it is characterised in that first transmission area or the second transmission area are diffusion
Piece or frosted glass material.
4. light source according to claim 1 or 2, it is characterised in that the granular micro-structure degree is less than or equal to 10 μm.
5. light source according to claim 3, it is characterised in that the micro-structural is formed by photoetching process.
6. light source according to claim 3, it is characterised in that the micro-structural is that scattering particles coating is formed.
7. light source according to claim 1, it is characterised in that the laser sends blue laser, first transmission
Area includes blue light transmission area, and second transmission area is blue light transmission area.
8. light source according to claim 1, it is characterised in that the laser sends blue laser and red laser, institute
Stating the first transmission area includes the first blue light transmission area and the first red transmission area, and second transmission area is saturating including the second blue light
Penetrate area and the second red transmission area.
9. light source according to claim 1, it is characterised in that the incidence surface of first transmission area and micro- knot of exiting surface
Structure arranges along the radial direction and circumferencial direction of first colour wheel respectively；And/or
The incidence surface of second transmission area and the micro-structural of exiting surface are respectively along the radial direction and circumference of second colour wheel
Direction arranges.
10. light source according to claim 3, it is characterised in that diffusion sheet or the frosted glass thickness is less than or equal to
0.7mm。
11. a kind of laser projection device, including light source, ray machine, camera lens and screen, it is characterised in that the light source is above-mentioned
Any described 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 (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510948988.9A CN105573030B (en) | 2015-12-18 | 2015-12-18 | A kind of light source and laser projection device |
| CN201810016464.XA CN108255006B (en) | 2015-12-18 | 2015-12-18 | Diffusion sheet |
| CN201810015436.6A CN108153093B (en) | 2015-12-18 | 2015-12-18 | Color wheel |
| CN201810016474.3A CN108287449B (en) | 2015-12-18 | 2015-12-18 | Color wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510948988.9A CN105573030B (en) | 2015-12-18 | 2015-12-18 | A kind of light source and laser projection device |
Related Child Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810016474.3A Division CN108287449B (en) | 2015-12-18 | 2015-12-18 | Color wheel |
| CN201810016464.XA Division CN108255006B (en) | 2015-12-18 | 2015-12-18 | Diffusion sheet |
| CN201810015436.6A Division CN108153093B (en) | 2015-12-18 | 2015-12-18 | Color wheel |
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| Publication Number | Publication Date |
|---|---|
| CN105573030A CN105573030A (en) | 2016-05-11 |
| CN105573030B true CN105573030B (en) | 2017-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810016464.XA Active CN108255006B (en) | 2015-12-18 | 2015-12-18 | Diffusion sheet |
| CN201810015436.6A Active CN108153093B (en) | 2015-12-18 | 2015-12-18 | Color wheel |
| CN201810016474.3A Active CN108287449B (en) | 2015-12-18 | 2015-12-18 | Color wheel |
| CN201510948988.9A Active CN105573030B (en) | 2015-12-18 | 2015-12-18 | A kind of light source and laser projection device |
Family Applications Before (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810016464.XA Active CN108255006B (en) | 2015-12-18 | 2015-12-18 | Diffusion sheet |
| CN201810015436.6A Active CN108153093B (en) | 2015-12-18 | 2015-12-18 | Color wheel |
| CN201810016474.3A Active CN108287449B (en) | 2015-12-18 | 2015-12-18 | Color wheel |
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| CN (4) | CN108255006B (en) |
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| CN107340679A (en) * | 2017-01-24 | 2017-11-10 | 深圳晗竣雅科技有限公司 | The method for improving projection image resolution ratio is repeatedly imaged by mirror tilt |
| TWI632421B (en) * | 2017-05-19 | 2018-08-11 | 台灣彩光科技股份有限公司 | Optical wheel |
| CN112147838B (en) * | 2017-08-18 | 2021-11-05 | 青岛海信激光显示股份有限公司 | Two-color laser light source and laser projector |
| CN112099295B (en) * | 2017-08-18 | 2021-11-05 | 青岛海信激光显示股份有限公司 | Two-color laser light source and laser projector |
| 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 |
| CN110389487A (en) * | 2018-04-17 | 2019-10-29 | 深圳光峰科技股份有限公司 | Light supply apparatus and display equipment |
| JP7240590B2 (en) | 2018-10-02 | 2023-03-16 | カシオ計算機株式会社 | Optical wheel, light source device and projection device |
| WO2020125070A1 (en) * | 2018-12-19 | 2020-06-25 | 青岛海信激光显示股份有限公司 | Laser light source and laser projector |
| CN111338166A (en) * | 2018-12-19 | 2020-06-26 | 青岛海信激光显示股份有限公司 | Laser light source and laser projector |
| CN111665579A (en) * | 2019-03-08 | 2020-09-15 | 台湾彩光科技股份有限公司 | Diffusion color wheel with different haze and illumination module of projection device |
| CN111983879A (en) * | 2019-05-24 | 2020-11-24 | 中强光电股份有限公司 | Optical element and projection device |
| EP4031924A4 (en) * | 2019-09-16 | 2023-06-07 | Materion Precision Optics (Shanghai) Limited | Reflective diffuser for reducing laser speckle and reflective luminescent wheel including same |
| CN114063372A (en) | 2020-07-30 | 2022-02-18 | 中强光电股份有限公司 | Filter module and projection device |
| CN113093398B (en) * | 2021-04-09 | 2023-01-06 | 青岛海信激光显示股份有限公司 | Speckle eliminating assembly, light source device and control method of light source device |
| CN114415387A (en) * | 2021-12-31 | 2022-04-29 | 中国科学院微电子研究所 | Device and method for improving laser uniformity |
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| CN101135738A (en) * | 2006-08-31 | 2008-03-05 | 财团法人工业技术研究院 | Optical pervasion module |
| 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 |
| CN104991407B (en) * | 2011-11-10 | 2017-02-01 | 深圳市光峰光电技术有限公司 | Light source system, lighting device and projection device |
| 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 |
| US8632197B2 (en) * | 2011-12-27 | 2014-01-21 | Delta Electronics, Inc. | Illumination system and wavelength-transforming device thereof |
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| CN103777447B (en) * | 2012-10-17 | 2016-03-16 | 深圳市绎立锐光科技开发有限公司 | A kind of light-source system, Wavelength converter and relevant projecting system |
| JP2014160227A (en) * | 2013-01-28 | 2014-09-04 | Panasonic Corp | Illumination device and video display apparatus |
| CN105116675B (en) * | 2015-06-03 | 2017-03-01 | 海信集团有限公司 | A kind of LASER Light Source and projection display apparatus |
| CN105093794B (en) * | 2015-06-03 | 2017-02-01 | 海信集团有限公司 | Double-color laser light source |
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2015
- 2015-12-18 CN CN201810016464.XA patent/CN108255006B/en active Active
- 2015-12-18 CN CN201810015436.6A patent/CN108153093B/en active Active
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- 2015-12-18 CN CN201510948988.9A patent/CN105573030B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108255006B (en) | 2020-03-24 |
| CN108153093A (en) | 2018-06-12 |
| CN108255006A (en) | 2018-07-06 |
| CN108287449B (en) | 2020-03-24 |
| CN105573030A (en) | 2016-05-11 |
| CN108153093B (en) | 2020-03-20 |
| CN108287449A (en) | 2018-07-17 |
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