CN105573030A - Light source and laser projection apparatus - Google Patents
Light source and laser projection apparatus Download PDFInfo
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- CN105573030A CN105573030A CN201510948988.9A CN201510948988A CN105573030A CN 105573030 A CN105573030 A CN 105573030A CN 201510948988 A CN201510948988 A CN 201510948988A CN 105573030 A CN105573030 A CN 105573030A
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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)
- Projection Apparatus (AREA)
Abstract
The invention discloses a light source. The light source comprises a first color wheel and a second color wheel, wherein the first color wheel comprises a fluorescence area and a first transmission area; and the second color wheel comprises a color filter area and a second transmission area. Through arranging microstructures on the incident surface and the light-emitting surface of the first transmission area or the second transmission area, while laser beams are transmitted, diffusion speckle dissipation can also be performed on the laser beams, functions of the first color wheel or the second color wheel are diversified, application of individual speckle dissipation parts can also be omitted or reduced in light source configuration, and simplification of the light source configuration and compression of light source volume can be facilitated. The invention also provides a laser projection apparatus applying the light source provided by the technical scheme.
Description
Technical field
The present invention relates to projection display technique field, particularly relate to a kind of light source of Projection Display.
Background technology
LASER Light Source, as a kind of solid state light emitter, has highlighted, and efficiently, the life-span is normal, and the series of advantages such as colour gamut is good, environmental protection become the selection of emerging projection light source.
In the LASER Light Source used in current industry, the fluorescence of the first colour wheel generation except laser color can be used, and jointly form three primary colours with laser, and the purity of fluorescence is improved by the colour filter of the second colour wheel, the three primary colours that final timing output purity is higher, the picture lightness gone out in this, as light source projects improves, and colour gamut is good.In prior art, the structure of the first colour wheel is as Fig. 1 example, and comprise phosphor region 11 and transmission area 12, wherein phosphor region 11 is coated with at least one fluorescent powder, be such as green emitting phosphor and yellow fluorescent powder, Stimulated Light can irradiate the fluorescence exciting and produce corresponding color successively.Transmission area 12 is generally clear glass, for transmitting blue laser.The second colour wheel parts are entered after above-mentioned fluorescence and sharp actinic light.In prior art, a kind of second colour wheel parts as shown in Figure 2, are made up of multiple optical filters, comprise color filter regions 21,22 and transmission area 23.Color filter regions 21 can be green color filter, and color filter regions 22 can be ruddiness optical filter, thus can obtain the higher green glow of purity and ruddiness to green fluorescence and yellow fluorescence filtration respectively, and transmission area 23 is generally clear glass, for transmitting blue laser.First colour wheel 01 and the second colour wheel 02 keep synchronous rotary, the output three primary colours light of timing, the final projected picture forming bright colors.
Summary of the invention
The invention discloses a kind of light source, comprise laser instrument, first colour wheel and the second colour wheel, microstructure is provided with by the incidence surface in the laser-transmitting district at the first or second colour wheel and exiting surface, the effect of diffusion dissipation spot can be played the laser in this region of transmission, make the functional diversities of the first or second colour wheel.
The present invention seeks to be achieved through the following technical solutions:
A kind of light source, comprises laser instrument, sends the laser of at least one color; First colour wheel, comprises phosphor region and the first transmission area, and phosphor region is for receiving laser and irradiate and producing the fluorescence of at least one color, and the first transmission area is used for transmission laser; Second colour wheel, comprise color filter regions and the second transmission area, color filter regions is for receiving the fluorescence of at least one color and colour filter exports, and the second transmission area is used for the laser of transmission at least one color, wherein, the incidence surface of the first transmission area or the second transmission area and exiting surface are provided with microstructure;
Further, the incidence surface of the first transmission area and/or the microstructure of exiting surface closely to arrange to white-out along the circumferencial direction of the first colour wheel in by dredging; And/or,
The incidence surface of the second transmission area and/or the microstructure of exiting surface closely to arrange to white-out along the circumferencial direction of the second colour wheel in by dredging.
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, microstructure is formed by photoetching process.
Further, microstructure is scattering particles coating formation.
Further, laser instrument sends blue laser, and the first transmission area comprises blue light transmission area, and the second transmission area is blue light transmission area.
Or further, laser instrument sends blue laser and red laser, the first transmission area comprises the first blue light transmission area and the first red transmission district, and the second transmission area comprises the second blue light transmission area and the second red transmission district.
Further, the incidence surface of the first transmission area and the microstructure of exiting surface are respectively along radial direction and the circumferencial direction arrangement of the first colour wheel; And/or,
The incidence surface of the second transmission area and the microstructure of exiting surface are respectively along radial direction and the circumferencial direction arrangement of the second colour wheel.
Further, diffusion sheet or frosted glass thickness are less than or equal to 0.7mm
And the invention allows for a kind of laser projection device, comprise light source, ray machine, camera lens and screen, wherein, light source adopts the light source of above-mentioned arbitrary technical scheme.
Embodiment of the present invention technical scheme, at least has following technique effect or advantage:
The light source that embodiment of the present invention technical scheme provides, comprise laser instrument, first colour wheel and the second colour wheel, wherein, incidence surface and the exiting surface in the laser-transmitting district on the first colour wheel or the second colour wheel are provided with microstructure, along with the first or second colour wheel Periodic Rotating, laser can be spread by the microstructure on this surface when incidence corresponding colour wheel transmission area incidence surface, laser beam is produced to the random phase spatially of some, the generation of random phase can destroy interference condition, the coherence of laser can be weakened, and when penetrating from the exiting surface of corresponding colour wheel transmission area, the microstructure that again can be arranged on exiting surface spreads, again cause the generation of random phase, weaken the coherence of laser further, multiple independently speckle pattern is formed in the picture finally making light source projects be formed, utilize the integral action of human eye, the speckle effect of picture can weaken greatly.Thus, laser can also carry out dissipation spot while exporting through the first colour wheel or the second colour wheel transmission, there is make the first colour wheel except wavelength convert effect, dissipation spot can also be carried out to laser, or the second colour wheel is except having color filtration, dissipation spot can also be carried out to laser, make the first colour wheel or the second colour wheel multifunction.
Meanwhile, because the first colour wheel of such scheme or the second colour wheel can carry out dissipation spot to laser, can save or reduce the use of independent dissipation spot parts in light source framework, be beneficial to the simplification of light source framework and the compression of light source volume.
The laser projection device that embodiment of the present invention technical scheme proposes, the light source of application technique scheme, timing can export three primary colours, also laser is preferably dissipated spot simultaneously, improve projected image quality, and, can save or reduce the use of dissipation spot parts independent in light source framework, be beneficial to the simplification of light source framework, the compression of light source volume, and the miniaturization being beneficial to projection arrangement.
Accompanying drawing explanation
Fig. 1 is the planar structure schematic diagram of a kind of first colour wheel in prior art;
Fig. 2 is the planar structure schematic diagram of a kind of second colour wheel in prior art;
Fig. 3 is the light source configuration diagram in the embodiment of the present invention one;
Fig. 4 A is the plane subregion schematic diagram of the second colour wheel in the embodiment of the present invention one;
Fig. 4 B is 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 microstructure 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 microstructure in the embodiment of the present invention five;
Figure 12 is the gaussian shaped profile schematic diagram of laser;
Figure 13 is the horizontal section structural representation 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 that one of laser projection device in the embodiment of the present invention six specifically implements structural representation.
Embodiment
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, and obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Below in conjunction with accompanying drawing, the technical scheme that the embodiment of the present invention provides is described in detail.
Embodiment one
The present invention aims to provide a kind of light source, as shown in Figure 3, comprise laser instrument 10, incident first colour wheel 20 of the laser that laser instrument 10 sends, along with the Periodic Rotating of the first colour wheel, first colour wheel 20 receiving unit laser irradiates and produces fluorescence and transmissive portion laser, incident second colour wheel 30 after the laser ECDC light parts 40 of fluorescence and transmission close light, after the second colour wheel 30 colour filter and transmission, the output three primary colours light of timing, and finally enter optical wand 50 and carry out homogenize, for x ray machine part provides illumination.
Particularly, laser instrument 10 can be one group, also can be many groups, and can be such as two groups of homeotropic alignment, and synthesize a branch of outgoing by light combination mirror sheet, in the present embodiment, laser instrument 10 sends blue laser.
The beam area sent due to laser instrument is comparatively large, needs to become through beam shaping the hot spot meeting fluorescence excitation requirement, and as shown in Figure 3, laser beam also carries out contracting bundle through telescopic system 11, and the facula area of laser is diminished.
In the present embodiment, first colour wheel 20 comprises phosphor region and the first transmission area, wherein phosphor region comprises green emitting phosphor and yellow fluorescent powder, phosphor region and the first transmission area all distribute along the excircle of the first colour wheel 20, blue laser hot spot irradiates this outer circumferential area successively, corresponding phosphor area can be excited successively to produce green fluorescence and yellow fluorescence, and go out from the first transmissive region.In specifically implementing one, first colour wheel 20 is reflective fluorescent wheel, the fluorescence of being excited to produce is by the aluminium base mirror-reflection of the first colour wheel, penetrate along the direction contrary with laser incident direction, and arrive conjunction light parts 40, the relaying loop become through multiple lens set after blue laser transmission is back to the front of the first colour wheel 20 again, also assemble to closing light parts 40, particularly, closing light parts 40 can be dichroic sheet, by plated film, allow blue laser reflection, and allow green fluorescence and yellow fluorescence transmission.
And, three coloured light after ECDC light reach the second colour wheel 30, as previously mentioned, second colour wheel comprises optical filter, colour filter can be carried out to fluorescence, improve the purity of fluorescence, in embodiments of the present invention simultaneously, incidence surface and the exiting surface of the second transmission area of the second colour wheel are provided with microstructure, can carry out diffusion dissipation spot while to blue laser transmission.
Particularly, as shown in Figure 4 A, second colour wheel 30 comprises green glow optical filter 31 for filtering green fluorescence, Red lightscreening plate 32 obtains red fluorescence for filtering yellow fluorescence, and second transmission area 33, transmission area 33, second can be diffusion sheet material, also can be frosted glass, the thickness of diffusion sheet or frosted glass is less than or equal to 0.7mm, namely adopts the diffusion sheet under existing process conditions or frosted glass to be processed to form.
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 sheet, but dissipation spot effect is slightly poorer than diffraction type diffusion sheet.
Be provided with microstructure at the incidence surface of diffusion sheet or frosted glass and exiting surface, wherein, granular micro-structure degree is less than or equal to 10um, is less than the granularity of about the 40 ~ 50um of common diffusion sheet.Microstructure can be formed by photoetching process, also for being coated in the scattering particles layer of transmission area region surface, can its objective is that the both side surface in transmission area forms non-polished surface, can form diffusion to laser.
As Fig. 5 A, the second colour wheel second transmission area cross-section structure enlarged diagram shown in Fig. 5 B, microstructure can be multiple sawtooth projection, or circular protrusions, or other irregular figures, to be not specifically limited at this, the effect of above-mentioned microstructure can produce scattering to the laser of incidence, because reflecting surface is on-plane surface, thus makes the angle and direction that the laser beam after reflection spreads have diversity, be beneficial to and form multiple random space phase, to weaken the coherence of laser beam.
The incidence surface of the second transmission area can be identical with the microstructure aspects of exiting surface, also can be different.
Above-mentioned microstructure can show to be evenly distributed in the second region, transmission area, also can be non-uniform Distribution.Consider the gaussian shaped profile feature of laser, as shown in Figure 10, the light intensity be positioned near optical axis is larger, coherence is also the strongest, therefore in the embodiment of the present invention, the arrangement of the microstructure of the incidence surface of the second transmission area or the microstructure of exiting surface or two-sided microstructure is arranged as follows: along the second colour wheel circumferencial direction or along second colour wheel rotate direction in by dredge close to white-out row, as shown in Figure 4 B.Thus when laser facula exposes to the second transmission area micro-structure surface, relatively intensive microstructure area can be larger to the energy proportion near the optical axis of laser facula beam section carry out the diffusion of stronger degree, improve the efficiency of eliminating coherence, relatively sparse microstructure area can to laser facula there is certain dispersion angle and energy accounts for the diffusion that smaller beam section is also carried out to a certain degree, thus whole laser beam is reached to the effect of the relative homogenize of diffusion effect, weaken the coherence of laser beam.
In embodiments of the present invention, because the incidence surface of the second transmission area and exiting surface are all provided with microstructure, thus laser has carried out twice diffusion when this region of transmission, wherein suppose after the diffusion of incidence surface, degree of divergence is a, after the diffusion of exiting surface, degree of divergence is b, so after passing whole transmission area microstructure, the degree of divergence of laser beam is c, and three is approximate to be met:
.
The incidence surface of the second transmission area can be identical with the microstructure arrangement density degree of exiting surface, also can be different.
In embodiments of the present invention, by the incidence surface of the second transmission area by the second colour wheel and exiting surface, all microstructure is set, thus this region, transmission area is equivalent to the diffusion sheet of a slice motion, laser can be spread by the microstructure on this surface when incident second transmission area incidence surface, laser beam is produced to the random phase spatially of some, the generation of random phase can destroy interference condition, the coherence of laser can be weakened, and when penetrating from the exiting surface of transmission area, the microstructure that again can be arranged on exiting surface spreads, again cause the generation of random phase, weaken the coherence of laser further, thus through parts, twice diffusion can be carried out, compared to diffusion sheet structure independent in prior art, the diffusion of light beam and eliminating coherence effect are all obtained and optimizes and improve.
And, by for gaussian laser type characteristic distributions, the microstructure in second at least one face, transmission area be set to along the circumferencial direction of the second colour wheel or closely arrange to white-out in by dredging along the direction that the second colour wheel rotates, can near laser beam axis, comparatively strong and energy proportion the is larger beam section of coherence carries out the diffusion of stronger degree, improves the efficiency of eliminating coherence.
Through technique scheme, form multiple independently speckle pattern, utilize the integral action of human eye in the picture finally making light source projects be formed, the speckle effect of picture can weaken greatly.Thus laser can also carry out dissipation spot while exporting through the second colour wheel transmission, makes the functional diversities of the second colour wheel parts.
Meanwhile, because the second colour wheel can carry out dissipation spot to laser, the use of independent dissipation spot parts be can save or reduce in light source framework, the simplification of light source framework and the compression of light source volume are beneficial to.
Embodiment two
In the embodiment of the present invention two and embodiment one unlike, in embodiments of the present invention, as shown in Figure 6, the first transmission area 22 of the first colour wheel 20 incidence surface and exiting surface be provided with microstructure, diffusion dissipation spot can be carried out while to blue laser transmission.
Wherein, first transmission area of the first colour wheel and the second transmission area of the second colour wheel are all for transmission laser, two transmission areas are synchronous with the rotation maintenance of two colour wheels, namely relative position is constant, area size is also identical, just in the first colour wheel, first transmission area is arranged on the outer circumferential area of colour wheel usually, in second colour wheel, the second transmission area is set to sector region usually, two transmission areas are comparatively similar on vibrational power flow, therefore for the set-up mode of the microstructure of the first transmission area 22 in the first colour wheel, see particular content in embodiment one, can not repeat them here.Thus the first colour wheel, while can carrying out wavelength convert, can also carry out dissipation spot to the laser of transmission, thus makes the first colour wheel multifunction, and be beneficial in omission or minimizing system the use of the spot parts that dissipate, be 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 Figure 7, in the present embodiment, laser instrument sends the laser of two kinds of colors, be that blue laser 11 sends blue laser respectively, red laser 12 sends red laser, and two kinds of laser enter conjunction light parts 40 and carry out conjunction bundle after focusing on contracting bundle, closing light parts 40 can be dichroic sheet, can transmitting blue laser reflection Red laser.
Blue laser after conjunction bundle and red laser are all incident to the first colour wheel 20, accordingly, as shown in Figure 8, first colour wheel 20 comprises phosphor region 21 and the first blue light transmission area 22, first red transmission district 23(is made up of sub-transmission area 231,232,233), wherein phosphor region 21 comprises green emitting phosphor, because the wavelength of blue laser is shorter, use blue laser as laser pumping light, excite green emitting phosphor to send green fluorescence.Sequential is lighted according to blue laser and red laser, and the position that the first colour wheel 20 rotates, blue laser and red laser are incident to the zones of different on the first colour wheel 20 surface respectively.Particularly, when blue laser is lighted, a blue laser part exposes to green emitting phosphor region, excite generation green fluorescence, in the present embodiment, the first colour wheel 20 is transmission-type first colour wheel, also reflectance coating is provided with at green emitting phosphor area surfaces, the fluorescence on this surface incident can be reflected, make fluorescence be back to the first colour wheel back side, penetrate along the direction consistent with laser incident direction.And according to the change of the first colour wheel position of rotation, a part of blue laser, through the blue laser transmission area of the first colour wheel 20, penetrates from first colour wheel 20 back side.When red laser is lighted, the first colour wheel 20 rotates to position, red laser transmission area, and red laser is through this region, transmission area and from the first colour wheel back side injection.Thus red laser, blue laser and green fluorescence are successively from the first colour wheel 20 back side injection.Enter the second colour wheel 30 more successively from three coloured light of the first colour wheel 20 back side outgoing, through colour filter and the transmission of the second colour wheel 30, timing exports three primary colours.
In the embodiment of the present invention three, incidence surface and the exiting surface of the first red transmission district 23, blue light transmission area 22, first are provided with microstructure, the shape of the microstructure in concrete each laser-transmitting district, arrangement rule can arrange explanation see microstructure in the embodiment of the present invention one.
And the double-side micro structure in the first blue transmission district 22 can be uniformly distributed, also can be that one side is uniformly distributed, another side non-uniform Distribution, such as according to the density arrangement mode described in embodiment one.
For the first red transmission district 23, consider that the speckle sensitivity of human eye to red laser is higher, therefore, be set to dispersion angle at the microstructured ar-rangement of red laser transmission area and be greater than blue laser transmission area, so that the speckle degree of balanced two kinds of color laser.
Particularly, in embodiments of the present invention, the first red transmission district 23 can comprise multiple sub-transmission area, and multiple sub-transmission area can be fan-shaped, also can be multiple arc sections of laser facula process.Shown in Figure 8, sub-transmission area 231 can be comprised, 232, 233, wherein the microstructure arrangement of multiple sub-transmission area can along the first colour wheel circumferencial direction in close to thin arrangement mode by dredging, the dispersion angle being positioned at the 232 pairs of red lasers in sub-transmission area of zone line in multiple sub-transmission area is greater than the sub-transmission area 231 being positioned at two side areas, the dispersion angle of 233 pairs of red lasers, and the area of the sub-transmission area 232 being positioned at zone line in multiple sub-transmission area is greater than the sub-transmission area 231 being positioned at two side areas, the area of 233, can disperse largely the light beam near optical axis for red laser gaussian shaped profile feature, improve degree and the efficiency of eliminating coherence.
And the microstructure in two faces of the first blue light transmission area 22 also can be arranged with reference to the rule that arranges in the first red transmission district 23, does not limit at this.
The light source provided in the embodiment of the present invention three is two-color laser light source, accordingly, first colour wheel and the second colour wheel are provided with two-color laser transmission area, particularly, first colour wheel is arranged respectively blue light transmission area and red transmission district, and the dispersion angle of red transmission district to red laser is greater than the dispersion angle of blue light transmission area to blue laser, the eliminating coherence effect to red laser can be improved, and, according to gaussian laser characteristic distributions, multiple sub-transmission area is divided into the first red transmission, the microstructure density arrangement of each sub-transmission area closely to arrange to thin according to by dredging, specific aim improves the eliminating coherence effect of the stronger beam component of red laser coherence, above measure can alleviate the speckle effect of red laser, according to the difference of human eye to red laser speckle and blue laser speckle susceptibility, reach the effect that the laser speckle degree of two kinds of colors is consistent, thus embodiment of the present invention scheme is while can improving laser dissipation spot effect, the consistance of two kinds of color laser speckle degree can also be taken into account, image picture quality is stablized, improve user and watch impression value.
The embodiment of the present invention three is based on embodiment one, and the part identical with embodiment one does not repeat them here.
Embodiment four
In the embodiment of the present invention four and embodiment three unlike, as shown in Figure 9, second colour wheel 30 can specifically comprise green filter district 31, second blue light transmission area 32 and the second red transmission district 33, wherein, incidence surface and the exiting surface in the second blue light transmission area 32 and the second red transmission district 33 are provided with microstructure, the wherein set-up mode of microstructure in the second blue light transmission area 32, the set-up mode of the microstructure in the second red transmission district 33 can see the first blue light transmission area 22 in embodiment three, the set-up mode in the first red transmission district 23, similar in its process and action effect and embodiment three, do not repeat them here.
Embodiment five
The embodiment of the present invention five proposes a kind of light source, as shown in Figure 10, with in enforcement two unlike, the light source that the embodiment of the present invention five provides, the red laser that red laser 12 sends is directive first colour wheel 20 no longer, but be arranged in parallel with the blue laser light path that blue laser 11 sends, accordingly, in the embodiment of the present invention five, first colour wheel 20 need arrange the first blue light transmission area, outgoing blue laser and green fluorescence successively from its back side, and reach conjunction light parts 40, wherein the incidence surface of the first blue light transmission area and exiting surface all arrange microstructure, particularly, the set-up mode of microstructure can see described in embodiment one or embodiment three.
Red laser is also incident after focusing on closes light parts 40, three coloured light are 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 see the subregion of the second colour wheel in embodiment four, also the second blue light transmission area and the second red transmission district is comprised, wherein with embodiment four in unlike, the incidence surface of the second blue light transmission area or the second red transmission district or two transmission areas and the microstructure setting direction of exiting surface are all at an angle.
Particularly, for the second blue light transmission area, the microstructure of the such as incidence surface of the second blue light transmission area and the microstructure of exiting surface are all as shown in Figure 4 A, xsect is triangle or V-arrangement, can by the microstructure of incidence surface along the circumferencial direction of the second colour wheel or sense of rotation arrangement, direction 2 as shown in Figure 11 B, as the second colour wheel is carried out longitudinal profile, then obtains shape as shown in Figure 4 A.And, be the center of circle by the microstructure of exiting surface along the rotation center of the second colour wheel, arrange by its radial direction, direction 1 as shown in Figure 11 A, as carried out carrying out section perpendicular to the second colour wheel radial direction along the second colour wheel, then obtain figure shape as shown at 13.
From such scheme, due to the microstructure of incidence surface and exiting surface setting direction at an angle, such as vertical or near normal, so the coplanar laser illumination of microstructure or reflecting surface are also correspondingly at an angle, such as vertical or near normal, like this, the microstructure in two faces easily presents diversity to the dispersal direction of laser and dispersion angle, for laser beam, be diffused the probability just reduction that the space phase of formation is identical for twice, thus the quantity of random phase pattern will increase, be beneficial to the eliminating coherence of laser, the picture speckle that light source is formed thus can weaken within the human eye integration response time in homogenize, reach the effect of dissipation spot.
In like manner, the microstructure in the second red transmission district also can with reference to setting.
And transmission area incidence surface is identical with the microstructure aspects of exiting surface in above-mentioned example, in another is specifically implemented, also can be different.
Setting direction scheme at an angle for above-mentioned laser-transmitting district incidence surface and exiting surface microstructure is applicable to the first blue light transmission area of the first colour wheel too.
The light source provided in the embodiment of the present invention five, also be a kind of two-color laser light source, it is different due to blue laser transmission area or the incidence surface of red laser transmission area or these two transmission areas and the microstructure of exiting surface are set to orientation, thus the diversity of laser dispersal direction and angle can be increased, produce multiple random phase pattern, be beneficial to the eliminating coherence of laser further, make the dissipation spot effect promoting of light source.
In the above-mentioned one or more embodiment of the present invention, by in the laser-transmitting district of the first colour wheel or the second colour wheel, the incidence surface in laser-transmitting district and exiting surface are all arranged microstructure, thus this laser-transmitting area is equivalent to the diffusion sheet of a slice motion, laser can be arranged on surface microstructure when incident transmission district incidence surface and exiting surface spreads, thus through parts, twice diffusion can be carried out, compared to diffusion sheet structure independent in prior art, the diffusion of light beam and eliminating coherence effect are all obtained and optimizes and improve.
And, by for gaussian laser type characteristic distributions, the direction microstructure at least one face, laser-transmitting district be set to along the circumferencial direction of the first or second colour wheel or rotation closely to arrange to white-out in by dredging, can near laser beam axis, comparatively strong and energy proportion the is larger beam section of coherence carries out the diffusion of stronger degree, improves the efficiency of eliminating coherence.
And, by distribution in the first or second colour wheel structure of two-color laser light source, blue laser transmission area and red laser transmission area are set, and the dispersion angle of red laser transmission area to red laser is set is greater than the dispersion angle of blue laser transmission area to blue laser, the eliminating coherence effect to red laser can be improved, reach the effect that the laser speckle degree of two kinds of colors is consistent.
And, by the orientation of the microstructure to laser-transmitting district incidence surface and exiting surface, difference is set, angle such as in approximate right angle, the dispersal direction of laser and the diversity of angle can be increased, produce multiple random phase pattern, be beneficial to the eliminating coherence of laser further, make the dissipation spot effect promoting of light source.
Thus through technique scheme, form multiple independently speckle pattern in the picture finally making light source projects be formed, utilize the integral action of human eye, the speckle effect of picture can weaken greatly.Thus laser can also carry out dissipation spot while exporting through the first colour wheel or the second colour wheel transmission, makes the functional diversities of the second colour wheel parts.
Meanwhile, because the first colour wheel or the second colour wheel can carry out dissipation spot to laser, can save or reduce the use of independent dissipation spot parts in light source framework, be beneficial to the simplification of light source framework and the compression of light source volume.
Embodiment six
The embodiment of the present invention six provides a kind of laser projection device, as shown in figure 12, comprise light source 1, ray machine 2, camera lens 3 and screen 4, specifically, light source 1 can light source in above-mentioned enforcement one or embodiment two or embodiment three or embodiment four or embodiment five, light source 1 provides illumination for ray machine 2, the core component of ray machine 2 is DMD, DMD modulates rear incident camera lens 3 to light, 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 projects image onto on screen 4 after imaging, form projected picture, for user's viewing.
In one is specifically implemented, as shown in figure 13, light source in Application Example five, three primary colours light through the second colour wheel 30 export laggard enter optical wand 50, optical wand 50 sends into the illuminator (not shown) of ray machine 2 after light beam being carried out homogenize as even smooth parts, illuminator by beam projection on dmd chip 60, through overdriving, light beam after modulation is exported to ultrashort zoom lens 70 and is carried out imaging by DMD60, finally projects picture projection screen (not shown) or other media being formed ornamental.
Laser projection device provided by the invention, the second colour wheel parts wherein timing can either export three primary colours, also by incidence surface in transmission area and exiting surface, all microstructure is set simultaneously, laser is preferably dissipated spot, improves projected image quality, and, due to the multifunction of the second colour wheel, can save or reduce the use of dissipation spot parts independent in light source framework, be beneficial to the simplification of light source framework, the compression of light source volume, and the miniaturization being beneficial to laser projection device.
In like manner, laser projection device provided by the invention also can be applied as the light source in embodiment two or embodiment four, thus the first colour wheel parts are while carrying out wavelength convert, also dissipation spot can be carried out to the laser of transmission, make the first colour wheel multifunction, also can save or reduce the use of dissipation spot parts independent in light source framework, be beneficial to the simplification of light source framework, the compression of light source volume, and the miniaturization being beneficial to laser projection device.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (11)
1. a light source, comprises laser instrument, sends the laser of at least one color; First colour wheel, comprises phosphor region and the first transmission area, and described phosphor region is irradiated and the fluorescence producing at least one color for receiving described laser, and described first transmission area is used for laser described in transmission; Second colour wheel, comprises color filter regions and the second transmission area, and described color filter regions is for receiving the fluorescence of described at least one color and colour filter exports, and described second transmission area is used for the laser of at least one color described in transmission, it is characterized in that:
Incidence surface and the exiting surface of described first transmission area or the second transmission area are provided with microstructure.
2. light source according to claim 1, is characterized in that, the described incidence surface of the first transmission area and/or the microstructure of exiting surface closely to arrange to white-out along the circumferencial direction of described first colour wheel in by dredging; And/or,
The described incidence surface of the second transmission area and/or the microstructure of exiting surface closely to arrange to white-out along the circumferencial direction of described second colour wheel in by dredging.
3. light source according to claim 1 and 2, is characterized in that, described first transmission area or the second transmission area are diffusion sheet or frosted glass material.
4. light source according to claim 1 and 2, is characterized in that, described granular micro-structure degree is less than or equal to 10 μm.
5. light source according to claim 3, is characterized in that, described microstructure is formed by photoetching process.
6. light source according to claim 3, is characterized in that, described microstructure is scattering particles coating formation.
7. light source according to claim 1, is characterized in that, described laser instrument sends blue laser, and described first transmission area comprises blue light transmission area, and described second transmission area is blue light transmission area.
8. light source according to claim 1, it is characterized in that, described laser instrument sends blue laser and red laser, and described first transmission area comprises the first blue light transmission area and the first red transmission district, and described second transmission area comprises the second blue light transmission area and the second red transmission district.
9. light source according to claim 1, is characterized in that, the incidence surface of described first transmission area and the microstructure of exiting surface are respectively along radial direction and the circumferencial direction arrangement of described first colour wheel; And/or,
The incidence surface of described second transmission area and the microstructure of exiting surface are respectively along radial direction and the circumferencial direction arrangement of described second colour wheel.
10. light source according to claim 3, is characterized in that, described diffusion sheet or frosted glass thickness are less than or equal to 0.7mm.
11. 1 kinds of laser projection devices, comprise light source, ray machine, camera lens and screen, is characterized in that, described light source is the arbitrary described light source of above-mentioned power 1-10, described light source provides illumination for described ray machine, and through described ray machine modulation enter described lens imaging and projection on the screen.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810016474.3A CN108287449B (en) | 2015-12-18 | 2015-12-18 | Color wheel |
| CN201510948988.9A CN105573030B (en) | 2015-12-18 | 2015-12-18 | A kind of light source and laser projection device |
| CN201810015436.6A CN108153093B (en) | 2015-12-18 | 2015-12-18 | Color wheel |
| CN201810016464.XA CN108255006B (en) | 2015-12-18 | 2015-12-18 | Diffusion sheet |
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| CN201510948988.9A CN105573030B (en) | 2015-12-18 | 2015-12-18 | A kind of light source and laser projection device |
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| CN201810015436.6A Division CN108153093B (en) | 2015-12-18 | 2015-12-18 | Color wheel |
| 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 |
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| CN105573030B CN105573030B (en) | 2017-12-19 |
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| 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 |
| CN201810016464.XA Active CN108255006B (en) | 2015-12-18 | 2015-12-18 | Diffusion sheet |
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| 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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Also Published As
| Publication number | Publication date |
|---|---|
| CN108287449B (en) | 2020-03-24 |
| CN105573030B (en) | 2017-12-19 |
| CN108287449A (en) | 2018-07-17 |
| CN108153093A (en) | 2018-06-12 |
| CN108153093B (en) | 2020-03-20 |
| CN108255006B (en) | 2020-03-24 |
| CN108255006A (en) | 2018-07-06 |
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