CN105573031A - Light source and laser projection apparatus - Google Patents
Light source and laser projection apparatus Download PDFInfo
- Publication number
- CN105573031A CN105573031A CN201510948990.6A CN201510948990A CN105573031A CN 105573031 A CN105573031 A CN 105573031A CN 201510948990 A CN201510948990 A CN 201510948990A CN 105573031 A CN105573031 A CN 105573031A
- Authority
- CN
- China
- Prior art keywords
- laser
- light source
- transmission area
- microstructure
- color
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/208—Homogenising, shaping of the illumination light
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Optics & Photonics (AREA)
- Projection Apparatus (AREA)
- Optical Filters (AREA)
Abstract
The invention discloses a light source. The light source comprises a laser emitting laser beams in at least one color; a fluorescent wheel used for receiving laser irradiation and generating fluorescence in at least one color; and a color filter wheel which comprises a color filter area and a transmission area, wherein the color filter area is used for receiving, filtering and outputting the fluorescence in the at least one color, and the transmission area is used for transmitting the laser beams in the at least one color. Through arranging microstructures on the incident surface and the light-emitting surface of the transmission area, while the laser beams are transmitted, diffusion speckle dissipation can also be performed on the laser beams, functions of the color filter wheel part 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 Wavelength converter generation except laser color can be used, and jointly form three primary colours with laser.As Fig. 1 example, laser instrument 10 sends laser, be specially blue laser, Wavelength converter 20 is coated with fluorescent powder, be specially green emitting phosphor and yellow fluorescent powder, Wavelength converter 20 Periodic Rotating, thus laser facula gets to Wavelength converter surface successively, and excite different fluorescent powder to send the fluorescence of corresponding color.But the fluorescence spectra produced due to fluorescent material is wider, make the primary lights purity of respective color not enough, the colour gamut of light source is caused to be performed poor, and expect by filtering the light obtaining other colors, filter yellow fluorescence as by Red lightscreening plate and obtain red fluorescence, generally need to be filtered fluorescence by optical filter, the excitation of fluorescence can either be improved, also can obtain the color expected.Therefore achieve the above object by being provided with filter wheel 30 parts in the illuminator front end of the rear end of Wavelength converter 20, ray machine.Filter wheel parts comprise multiple optical filter composition that can filter different colours, and rotate with Wavelength converter 20 property synchronizing cycle.Filter wheel 30 and Wavelength converter 20 have the color subregion of corresponding center of circle angle, such as comprise green glow optical filter and ruddiness optical filter, and blue laser transmission area, along with the synchronous rotary of two colour wheels, can the output three primary colours light of timing, the optical wand 40 entering ray machine carries out homogenize, for ray machine provides illumination, and the final projected picture forming bright colors.
And, because the purity of laser own is higher, laser-transmitting region on filter wheel parts is no longer set to the optical filter of corresponding laser color usually, but clear glass, Fig. 2 shows the structural representation of a kind of filter wheel in prior art, comprise green color filter 31, Red lightscreening plate 32, and the blue laser transmission area 33 of clear glass material.
And; from aforementioned; due to the high coherence of laser; inevitably speckle effect can be formed when forming projected picture as light source; therefore in the light source framework shown in above-mentioned Fig. 1, usually also need additionally to add such as diffusion sheet, random phase device or multimode optical fiber to carry out dissipation spot, to alleviate the speckle effect that laser beam causes.This makes light source framework complicated, and parts are more, and volume is also relatively large.
Summary of the invention
The invention discloses a kind of light source, comprise laser instrument, fluorescent wheel and filter wheel, be provided with microstructure by the incidence surface in filter wheel transmission area and exiting surface, the effect of diffusion dissipation spot can be played the laser in this region of transmission, make the functional diversities of filter 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; Fluorescent wheel, irradiates and the fluorescence producing at least one color for receiving laser; Filter wheel, comprises color filter regions and transmission area, and wherein, color filter regions is for receiving the fluorescence of at least one color and filtering output, and transmission area is used for the laser of transmission at least one color, and wherein, incidence surface and the exiting surface of transmission area are provided with microstructure;
Further, the incidence surface of transmission area and/or the microstructure of exiting surface closely to arrange to white-out along the circumferencial direction of filter wheel in by dredging;
Further, transmission area is 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 transmission area comprises blue light transmission area;
Further, laser instrument sends blue laser and red laser, and transmission area comprises blue light transmission area and red transmission district;
Further, the incidence surface of transmission area and the microstructure of exiting surface are respectively along radial direction and the circumferencial direction arrangement of filter 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, fluorescent wheel and filter wheel, wherein filter wheel is carried except highly purified effect except the fluorescence produced fluorescent wheel has colour filter, incidence surface also in transmission area and exiting surface are provided with microstructure, along with filter wheel Periodic Rotating, laser can be spread by the microstructure on this surface when incident transmission district 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, 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 colour wheel transmission after filtration exports, and makes the functional diversities of filter wheel parts.
Meanwhile, because filter 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.
The laser projection device that embodiment of the present invention technical scheme proposes, the light source of application technique scheme, filter wheel parts timing can either 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 configuration diagram of a kind of light source in prior art;
Fig. 2 is the structural representation of a kind of filter 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 partitioned organization schematic diagram of filter wheel in the embodiment of the present invention one;
Fig. 4 B is the another plane partitioned organization schematic diagram of filter wheel in the embodiment of the present invention one;
Fig. 5 A, 5B are respectively the cross sectional shape schematic diagram of a kind of microstructure of the embodiment of the present invention;
Fig. 6 is the light source configuration diagram in the embodiment of the present invention two;
Fig. 7 is the plane partitioned organization schematic diagram of filter wheel in the embodiment of the present invention two;
Fig. 8 is the light source configuration diagram in the embodiment of the present invention three;
Fig. 9 A, 9B are respectively the orientation schematic diagram of the embodiment of the present invention three kinds of microstructures;
Figure 10 is the gaussian shaped profile schematic diagram of laser;
Figure 11 is the horizontal section structural representation of filter wheel in the embodiment of the present invention three;
Figure 12 is laser projection device configuration diagram in the embodiment of the present invention four;
Figure 13 is that one of laser projection device in the embodiment of the present invention four 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, the laser incident fluorescence wheel 20 that laser instrument 10 sends, along with the Periodic Rotating of fluorescent wheel, fluorescent wheel 20 receiving unit laser irradiates and produces fluorescence and transmissive portion laser, incident filter wheel 30 after the laser ECDC light parts 40 of fluorescence and transmission close light, after filtration after 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, fluorescent wheel 20 comprises phosphor region and transmission area, wherein phosphor region comprises green emitting phosphor and yellow fluorescent powder, phosphor region and transmission area all distribute along the excircle of fluorescent 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 transmissive region.In specifically implementing one, fluorescent wheel 20 is reflective fluorescent wheel, and the fluorescence of being excited to produce, by the aluminium base mirror-reflection of fluorescent wheel, penetrates 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 fluorescent wheel 20 again, also assembles 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 filter wheel 30, as previously mentioned, filter 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 transmission area of filter wheel are provided with microstructure, can carry out diffusion dissipation spot while to blue laser transmission.
Particularly, as shown in Figure 4 A, filter wheel 30 comprises green glow optical filter 31 for filtering green fluorescence, Red lightscreening plate 32 obtains red fluorescence for filtering yellow fluorescence, and transmission area 33, transmission area 33 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, filter wheel 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 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 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 transmission area or the microstructure of exiting surface or two-sided microstructure is arranged as follows: along filter wheel circumferencial direction or along filter wheel rotate direction in by dredge close to white-out row, as shown in Figure 4 B.Thus when laser facula exposes to 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 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 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 transmission area by filter 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 transmission district 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 at least one face, laser-transmitting district be set to along the circumferencial direction of filter wheel or closely arrange to white-out in by dredging along the direction that filter 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 colour wheel transmission after filtration exports, and makes the functional diversities of filter wheel parts.
Meanwhile, because filter 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
The embodiment of the present invention two proposes a kind of light source, as shown in Figure 6, 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 fluorescent wheel 20, accordingly, fluorescent wheel 20 comprises phosphor region and transmission area (not shown), wherein phosphor region 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.The transmission area of fluorescent wheel 20 specifically comprises blue laser transmission area and red laser transmission area.Sequential is lighted according to blue laser and red laser, and the position that fluorescent wheel 20 rotates, blue laser and red laser are incident to the zones of different on fluorescent 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, fluorescent wheel 20 is transmission-type fluorescent 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 fluorescent wheel back side, penetrate along the direction consistent with laser incident direction.And according to the change of fluorescent wheel position of rotation, a part of blue laser, through the blue laser transmission area of fluorescent wheel 20, penetrates from fluorescent wheel 20 back side.When red laser is lighted, fluorescent wheel 20 rotates to position, red laser transmission area, and red laser passes this region, transmission area and penetrates from the fluorescent wheel back side.Thus red laser, blue laser and green fluorescence penetrate from fluorescent wheel 20 back side successively.
Filter wheel 30 is entered successively again from three coloured light of fluorescent wheel 20 back side outgoing, particularly, as shown in Figure 7, filter wheel 30 comprises green filter district 31, blue laser transmission area 32 and red laser transmission area 33, wherein, incidence surface and the exiting surface of blue laser transmission area 32 and red laser transmission area 33 are provided with microstructure, the shape of the microstructure in concrete each laser-transmitting district, arrangement rule can see explanation in the embodiment of the present invention one.
The double-side micro structure of blue laser transmission area 32 can be uniformly distributed, and 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 red laser transmission area 33, 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, red laser transmission area 33 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.The microstructure arrangement of multiple sub-transmission area can along filter wheel circumferencial direction in close to thin arrangement mode by dredging, the dispersion angle of sub-transmission area to red laser being positioned at zone line in multiple sub-transmission area be greater than be positioned at two side areas sub-transmission area to the dispersion angle of red laser, and the area of sub-transmission area being positioned at zone line in multiple sub-transmission area is greater than the area of the sub-transmission area being positioned at two side areas, 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 blue laser transmission area also can be arranged with reference to the rule that arranges of red laser transmission area, does not limit at this.
The light source provided in the embodiment of the present invention two is two-color laser light source, accordingly, fluorescent wheel and filter wheel are provided with two-color laser transmission area, particularly, filter wheel is arranged respectively blue laser transmission area and red laser transmission area, and the dispersion angle of red laser transmission area to red laser is greater than the dispersion angle of blue laser transmission area to blue laser, the eliminating coherence effect to red laser can be improved, thus 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 two technical scheme is the remodeling to embodiment one scheme, equally also has the beneficial effect in embodiment one, and the part identical with embodiment one does not repeat them here.
Embodiment three
The embodiment of the present invention three proposes a kind of light source, as shown in Figure 8, with in enforcement two unlike, the light source that the embodiment of the present invention three provides, the red laser that red laser 12 sends is directive fluorescent 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 three, fluorescent wheel 20 need arrange a blue laser transmission area, outgoing blue laser and green fluorescence successively from its back side, and reach and close light parts 40.Red laser is also incident after focusing on closes light parts 40, three coloured light are incident filter wheel 30 after closing light, in the embodiment of the present invention three, the setting of filter wheel 30 can see the subregion of filter wheel in embodiment two, also blue laser transmission area and red laser transmission area is comprised, wherein with embodiment two in unlike, the incidence surface of blue laser transmission area or red laser transmission area or two transmission areas and the microstructure setting direction of exiting surface are at an angle.
Particularly, for blue laser transmission area, the microstructure of the such as incidence surface of blue laser 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 filter wheel or sense of rotation arrangement, direction 2 as shown in Figure 9 B, as filter 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 filter wheel, arrange by its radial direction, direction 1 as shown in Figure 9 A, carry out section as carried out along filter wheel perpendicular to filter wheel radial direction, then obtain figure shape as indicated at 11.
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 of red laser transmission area 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.
The light source provided in the embodiment of the present invention three, also be a kind of two-color laser light source, due on embodiment two basis, 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 different, 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 passing through the incidence surface of the transmission area of filter wheel and exiting surface all to arrange microstructure in the transmission area of filter wheel, thus this region, transmission 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 microstructure at least one face, laser-transmitting district be set to along the circumferencial direction of filter wheel or closely arrange to white-out in by dredging along the direction that filter 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.
And, by distribution in the filter 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 colour wheel transmission after filtration exports, and makes the functional diversities of filter wheel parts.
Meanwhile, because filter 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 four
The embodiment of the present invention four 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, and 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, and 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, forms projected picture, watches for user.
In one is specifically implemented, as shown in figure 13, light source in Application Example 3, three primary colours light through filter 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, filter 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 filter 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.
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; Fluorescent wheel, irradiates and the fluorescence producing at least one color for receiving described laser; Filter wheel, comprises color filter regions and transmission area, and wherein, described color filter regions is for receiving the fluorescence of described at least one color and filtering output, and described 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 transmission area are provided with microstructure.
2. light source according to claim 1, is characterized in that, the incidence surface of described transmission area and/or the microstructure of exiting surface closely to arrange to white-out along the circumferencial direction of described filter wheel in by dredging.
3. light source according to claim 1 and 2, is characterized in that, described transmission area is 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 transmission area comprises blue light transmission area.
8. light source according to claim 1, is characterized in that, described laser instrument sends blue laser and red laser, and described transmission area comprises blue light transmission area and red transmission district.
9. light source according to claim 1, is characterized in that, the incidence surface of described transmission area and the microstructure of exiting surface are respectively along radial direction and the circumferencial direction arrangement of described filter 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 (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510948990.6A CN105573031B (en) | 2015-12-18 | 2015-12-18 | A kind of light source and laser projection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510948990.6A CN105573031B (en) | 2015-12-18 | 2015-12-18 | A kind of light source and laser projection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105573031A true CN105573031A (en) | 2016-05-11 |
| CN105573031B CN105573031B (en) | 2018-09-21 |
Family
ID=55883327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510948990.6A Active CN105573031B (en) | 2015-12-18 | 2015-12-18 | A kind of light source and laser projection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105573031B (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106647127A (en) * | 2016-12-29 | 2017-05-10 | 海信集团有限公司 | Laser projection system |
| CN106707671A (en) * | 2016-12-29 | 2017-05-24 | 海信集团有限公司 | Laser projection system |
| CN106707672A (en) * | 2016-12-30 | 2017-05-24 | 中国华录集团有限公司 | Projector with multi-angle atomization diffusion sheet optical structure |
| CN106773485A (en) * | 2016-12-29 | 2017-05-31 | 海信集团有限公司 | A kind of laser projection system |
| CN106873293A (en) * | 2016-12-30 | 2017-06-20 | 中国华录集团有限公司 | A kind of laser projection system for reducing speckle |
| CN107797372A (en) * | 2017-11-17 | 2018-03-13 | 四川长虹电器股份有限公司 | A kind of two-color laser light source optical automotive engine system |
| CN107885021A (en) * | 2016-09-30 | 2018-04-06 | 海信集团有限公司 | A kind of LASER Light Source and laser projection device |
| CN108398804A (en) * | 2018-03-28 | 2018-08-14 | 四川长虹电器股份有限公司 | A kind of laser dissipation spot light path and laser projection light-source system |
| CN109254415A (en) * | 2018-10-31 | 2019-01-22 | 四川长虹电器股份有限公司 | The laser of engraving external diffusion disappears speckle device in a kind of multidimensional |
| CN109358467A (en) * | 2018-11-16 | 2019-02-19 | 青岛海信激光显示股份有限公司 | A kind of laser light source, light source mode switching method and laser projection device |
| WO2019037327A1 (en) * | 2017-08-21 | 2019-02-28 | 深圳光峰科技股份有限公司 | Light source system and projection device |
| CN109870873A (en) * | 2017-12-05 | 2019-06-11 | 青岛海信激光显示股份有限公司 | A kind of Wavelength converter, light supply apparatus and optical projection system |
| CN109991802A (en) * | 2018-01-03 | 2019-07-09 | 深圳光峰科技股份有限公司 | Light-source system and projection device |
| US11867930B2 (en) | 2020-07-30 | 2024-01-09 | Coretronic Corporation | Filter module and projection apparatus |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520569A (en) * | 2011-12-02 | 2012-06-27 | 深圳市光峰光电技术有限公司 | Light source device and projection device using same |
| US20120242912A1 (en) * | 2011-03-23 | 2012-09-27 | Panasonic Corporation | Light source apparatus and image display apparatus using the same |
| CN103186021A (en) * | 2011-12-27 | 2013-07-03 | 台达电子工业股份有限公司 | Illumination system and wavelength-transforming device thereof |
| CN103777447A (en) * | 2012-10-17 | 2014-05-07 | 深圳市绎立锐光科技开发有限公司 | Light source system, wavelength conversion device and relevant projection system |
| US20140211169A1 (en) * | 2013-01-28 | 2014-07-31 | Panasonic Corporation | Lighting device and image display device |
| CN104880896A (en) * | 2012-03-19 | 2015-09-02 | 深圳市光峰光电技术有限公司 | Lighting device and projection device |
| CN105093794A (en) * | 2015-06-03 | 2015-11-25 | 海信集团有限公司 | Double-color laser light source |
| CN105116675A (en) * | 2015-06-03 | 2015-12-02 | 海信集团有限公司 | Laser source and projection display device |
-
2015
- 2015-12-18 CN CN201510948990.6A patent/CN105573031B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120242912A1 (en) * | 2011-03-23 | 2012-09-27 | Panasonic Corporation | Light source apparatus and image display apparatus using the same |
| CN102520569A (en) * | 2011-12-02 | 2012-06-27 | 深圳市光峰光电技术有限公司 | Light source device and projection device using same |
| CN103186021A (en) * | 2011-12-27 | 2013-07-03 | 台达电子工业股份有限公司 | Illumination system and wavelength-transforming device thereof |
| CN104880896A (en) * | 2012-03-19 | 2015-09-02 | 深圳市光峰光电技术有限公司 | Lighting device and projection device |
| CN103777447A (en) * | 2012-10-17 | 2014-05-07 | 深圳市绎立锐光科技开发有限公司 | Light source system, wavelength conversion device and relevant projection system |
| US20140211169A1 (en) * | 2013-01-28 | 2014-07-31 | Panasonic Corporation | Lighting device and image display device |
| CN105093794A (en) * | 2015-06-03 | 2015-11-25 | 海信集团有限公司 | Double-color laser light source |
| CN105116675A (en) * | 2015-06-03 | 2015-12-02 | 海信集团有限公司 | Laser source and projection display device |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107885021A (en) * | 2016-09-30 | 2018-04-06 | 海信集团有限公司 | A kind of LASER Light Source and laser projection device |
| CN106707671A (en) * | 2016-12-29 | 2017-05-24 | 海信集团有限公司 | Laser projection system |
| CN109884851A (en) * | 2016-12-29 | 2019-06-14 | 海信集团有限公司 | A kind of laser projection system |
| CN106773485A (en) * | 2016-12-29 | 2017-05-31 | 海信集团有限公司 | A kind of laser projection system |
| CN106647127A (en) * | 2016-12-29 | 2017-05-10 | 海信集团有限公司 | Laser projection system |
| CN106873293A (en) * | 2016-12-30 | 2017-06-20 | 中国华录集团有限公司 | A kind of laser projection system for reducing speckle |
| CN106707672A (en) * | 2016-12-30 | 2017-05-24 | 中国华录集团有限公司 | Projector with multi-angle atomization diffusion sheet optical structure |
| WO2019037327A1 (en) * | 2017-08-21 | 2019-02-28 | 深圳光峰科技股份有限公司 | Light source system and projection device |
| CN107797372A (en) * | 2017-11-17 | 2018-03-13 | 四川长虹电器股份有限公司 | A kind of two-color laser light source optical automotive engine system |
| CN109870873A (en) * | 2017-12-05 | 2019-06-11 | 青岛海信激光显示股份有限公司 | A kind of Wavelength converter, light supply apparatus and optical projection system |
| CN109991802A (en) * | 2018-01-03 | 2019-07-09 | 深圳光峰科技股份有限公司 | Light-source system and projection device |
| CN108398804A (en) * | 2018-03-28 | 2018-08-14 | 四川长虹电器股份有限公司 | A kind of laser dissipation spot light path and laser projection light-source system |
| CN109254415A (en) * | 2018-10-31 | 2019-01-22 | 四川长虹电器股份有限公司 | The laser of engraving external diffusion disappears speckle device in a kind of multidimensional |
| CN109358467A (en) * | 2018-11-16 | 2019-02-19 | 青岛海信激光显示股份有限公司 | A kind of laser light source, light source mode switching method and laser projection device |
| CN109358467B (en) * | 2018-11-16 | 2023-01-10 | 青岛海信激光显示股份有限公司 | Laser light source, light source mode switching method and laser projection equipment |
| US11867930B2 (en) | 2020-07-30 | 2024-01-09 | Coretronic Corporation | Filter module and projection apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105573031B (en) | 2018-09-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105573031A (en) | Light source and laser projection apparatus | |
| CN105573030A (en) | Light source and laser projection apparatus | |
| EP3306391B1 (en) | Laser light source and projection display device | |
| CN105093794B (en) | Double-color laser light source | |
| CN208752383U (en) | Lighting system and projection arrangement | |
| CN105093795B (en) | A kind of two-color laser light source | |
| JP6812196B2 (en) | Lighting system and projection device | |
| CN106569378B (en) | A kind of laser dissipation spot light path and two-color laser light source, three color laser light sources | |
| CN106597785A (en) | Fluorescent wheel and two-color laser source | |
| CN105353581A (en) | Color wheel and laser light source | |
| CN107861178A (en) | Compound eye lens group and apply its projection arrangement | |
| CN208537894U (en) | Lighting system and projection arrangement | |
| CN109521633A (en) | Lighting system and projection arrangement | |
| CN108303839B (en) | A kind of laser projection lighting source and its optical projection system | |
| CN101263421A (en) | Image forming device | |
| CN109976075A (en) | Wavelength converter | |
| CN102508401B (en) | Light source device and projector using same | |
| CN104870887A (en) | Light source device | |
| CN109407451B (en) | Two-color laser light source and laser projector | |
| US10281809B2 (en) | Projection apparatus and illumination system | |
| CN104808273A (en) | Light source system and light wavelength converter suitable for system | |
| CN208903065U (en) | Lighting system and projection arrangement | |
| CN109634036A (en) | Projection arrangement and its lighting system | |
| CN107145029B (en) | Light supply apparatus | |
| CN209962080U (en) | Speckle-dispelling mixed light source |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |