CN102620244B - Fluorescent wheel system, projector and light collimation and convergence method - Google Patents
Fluorescent wheel system, projector and light collimation and convergence method Download PDFInfo
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- CN102620244B CN102620244B CN201210062256.6A CN201210062256A CN102620244B CN 102620244 B CN102620244 B CN 102620244B CN 201210062256 A CN201210062256 A CN 201210062256A CN 102620244 B CN102620244 B CN 102620244B
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- 230000003287 optical effect Effects 0.000 claims abstract description 134
- 239000000843 powder Substances 0.000 claims abstract description 48
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 47
- 239000000758 substrate Substances 0.000 claims description 36
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Abstract
The embodiment of the invention discloses a fluorescent wheel system, a projector and a light collimation and convergence method, which relates to the field of the projectors and can effectively improve the brightness of a light source. The fluorescent wheel system disclosed by the embodiment of the invention comprises a fluorescent wheel, an optical lens and at least one optical collimation part, wherein the optical lens is assembled in front of the fluorescent wheel, the fluorescent wheel comprises a baseplate and a fluorescent powder layer which is annularly coated on the baseplate, the optical lens is used for converging light generated by the fluorescent powder layer after the light is excited, and the optical collimation part is used for collimating the light which is converged and passes through the optical lens.
Description
Technical field
The present invention relates to field of projector, relate in particular to a kind of method that fluorescent wheel system, the projector that uses this fluorescent wheel system and light collimation are assembled.
Background technology
Along with the development of technology, the future development that Projection Display product is more and more less towards volume, brightness is more and more higher in the market.Because New Solid light source projector adopts the light source of light-emitting phosphor mostly, be about to the annulus that fluorescent material is coated in round metal substrate, when projector works, LD (Laser Diode, semiconductor laser) light beam irradiates of sending on the fluorescent material of fluorescent wheel of rotation, the light of fluorescent material stimulated emission corresponding color.Because fluorescent material is the outgoing of near space 360 degree, so the collection of luminous energy has larger difficulty, the low luminance shortage that finally causes the light source of projector of utilization rate of luminous energy.
In order to improve the brightness of light source, the output that can increase exciting light, but need to use excitation source that amount of power consumption is larger or increase the quantity of excitation source, obviously above two kinds of methods are difficult to be applied to become in recent years in the electrical equipment of miniaturization.The brightness that how to improve light source under the prerequisite of volume that does not increase projector becomes a difficult problem being badly in need of solution.
The technical scheme adopting is at present set of lenses and the fluorescent wheel independent assembling respectively of shaping light beam, but the distance between the eyeglass of set of lenses and fluorescent wheel is difficult to accurately control and distance conventionally will be more than 1mm.Therefore in optical design, through overconvergence, excite hot spot larger, increased the optical extend of stimulated light emission, for follow-up optical design has brought great difficulty, simultaneously because fluorescent material is space all directions bright dipping, so spacing more than 1mm causes only having part luminous energy to receive, and the distance that cannot accurately control causes receiving efficiency also unstable.
Summary of the invention
A kind of method that provides fluorescent wheel system, projector and light collimation to assemble is provided embodiments of the invention technical problem to be solved, can obviously improve brightness and the utilization rate of light source, reduces the volume of projector.
For solving the problems of the technologies described above, embodiments of the invention adopt following technical scheme:
A kind of fluorescent wheel system, it is characterized in that, optical mirror slip and at least one optical alignment parts of comprising fluorescent wheel and being assemblied in described fluorescent wheel the place ahead, described fluorescent wheel comprises that substrate and annular are coated on the phosphor powder layer on described substrate, described optical mirror slip is for assembling the light that described phosphor powder layer is excited rear generation, and described optical alignment parts assemble for collimating the light that sees through described optical mirror slip.
Described optical mirror slip is convex lens structures or month dental mirror structure or aspherical mirror, or the microlens array structure being comprised of miniature convex lens or miniature month odontoscope.
Described optical alignment parts are specially convex lens structures or month dental mirror structure or aspherical mirror.
Described substrate is provided with Baltimore groove, and in order to assemble the light that sees through phosphor powder layer, described phosphor powder layer is positioned at described Baltimore groove.
The degree of depth of described Baltimore groove lower than or equal the thickness of described phosphor powder layer, described optical mirror slip is sealed in described phosphor powder layer in described Baltimore groove completely.
Described Baltimore groove intermediate reach is equipped with the sub-optical mirror slip of several parabolic shape, and described sub-optical mirror slip is microlens array structure.
Described substrate is reflection-type substrate.
The focal length of the lens set that described optical alignment parts and described optical mirror slip form is less than 1 millimeter, and the distance between described optical mirror slip and described optical alignment parts is less than 1.5 millimeters.
A projector, comprises the fluorescent wheel system described in above-mentioned any one.
The method that light collimation is assembled, comprising:
Optical alignment parts and optical mirror slip be the exciting light of converging parallel incident successively, form incident light source, described optical mirror slip is assemblied in the place ahead of described fluorescent wheel, and between described optical alignment parts and described phosphor powder layer, the focus of the lens set that described optical alignment parts and described optical mirror slip form is positioned on phosphor powder layer;
Optical mirror slip is assembled the light producing after described incident light source excites described phosphor powder layer;
Optical alignment parts receive the light that sees through described optical mirror slip, and the described light that sees through described optical mirror slip is converted to parallel emergent ray.
The method that the fluorescent wheel system of the embodiment of the present invention, projector and light collimation are assembled, by assembling optical mirror slip in fluorescent wheel the place ahead and at least one optical alignment parts being set, with the light of assembling, collimation produces after described phosphor powder layer excites, effectively improved the brightness of light source, reduce manufacture difficulty, reduced the volume of projector.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the side view of fluorescent wheel system and beam shaping system in the embodiment of the present invention;
Fig. 2 is the schematic perspective view of fluorescent wheel in the embodiment of the present invention;
Fig. 3 is the schematic diagram of the fluorescent wheel that in the embodiment of the present invention, optical mirror slip is micro lens array;
Fig. 4 has the schematic diagram of the fluorescent wheel of Baltimore groove in the embodiment of the present invention;
Fig. 5 has the schematic diagram of the fluorescent wheel of sub-optical mirror slip in the embodiment of the present invention;
Fig. 6 is that in the embodiment of the present invention, optical mirror slip is the schematic diagram of month dental mirror structure and non-spherical structure;
Fig. 7 is the schematic diagram that in the embodiment of the present invention, optics design is lens set;
Fig. 8 is that in the embodiment of the present invention, substrate is the fluorescent wheel system schematic of transmission-type substrate;
Fig. 9 is the schematic flow sheet of the method that in the embodiment of the present invention, light collimation is assembled.
The specific embodiment
A kind of method that the embodiment of the present invention provides fluorescent wheel system, projector and light collimation to assemble, the brightness that has effectively improved light source.
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail.
The present embodiment provides a kind of fluorescent wheel system, as depicted in figs. 1 and 2, comprise fluorescent wheel 1, optical mirror slip 2 and at least one optical alignment parts 3, optical mirror slip 2 is assemblied in the place ahead of fluorescent wheel, described fluorescent wheel 1 comprises that substrate 11 and annular are coated on the phosphor powder layer 12 on substrate 11, the light that optical mirror slip 2 is excited rear generation for assembling phosphor powder layer 12, optical alignment parts 3 assemble for collimating the light that sees through optical mirror slip 2.
The present embodiment is by fluorescent wheel the place ahead assembling optical mirror slip 2 and optical alignment parts 3 are set reduce the optical extend of optical system and increase brightness and export.After system works, fluorescent wheel 1 is along axle center quick rotation, and excitation source is opened simultaneously.In the present embodiment, the distance between optical alignment parts 3 and fluorescent wheel 1 can be designed as ultrashort operating distance, such as being 0.05mm.Due to the optical alignment parts 3 for having the same focal length, the diameter of eyeglass is less, and the thickness of eyeglass is also thinner, and therefore fluorescent wheel system of the present invention, when improving the brightness of light source, can also reduce the volume of projector.In addition,, because the distance between optical mirror slip 2 and fluorescent wheel 1 can accurately be controlled by pad being set between optical mirror slip 2 and fluorescent wheel 1, therefore can greatly reduce assembly difficulty.
Light as shown in dotted portion in Fig. 1, the exciting light of parallel incident is first through the convergence of optical alignment parts 3, pass through again the convergence of optical mirror slip 2, the lens set that optical alignment parts 3 and optical mirror slip 2 form can be converged to directional light a very little hot spot point, the exciting light that is about to parallel incident is focused at the focal position of the lens set of optical alignment parts 3 and optical mirror slip 2 compositions, form incident light source, wherein, focus is just positioned on phosphor powder layer, the exciting light of parallel like this incident is through twice convergence, finally on phosphor powder layer 12, be converged to a small light spot.After projector starts working, along with the rotation of fluorescent wheel 1, the position of relatively static incident light source fluorescence excitation bisque 12 is in continuous variation.The light producing after phosphor powder layer 12 in incident light source hot spot point is stimulated is to all directions outgoing.As one embodiment of the present invention, substrate 11 is reflection-type substrate, and therefore, with the reflex change direction of exciting light emergent light in the same way due to substrate 11, the Integral luminous angle that makes fluorescent material is space 180 degree.Obviously, for the optical mirror slip 2 of same diameter, nearer apart from fluorescent wheel 1, the luminous energy of convergence is just more, because the present invention has directly been assemblied in optical mirror slip 2 on fluorescent wheel 1, so most emergent lights has obtained collection, has improved collection efficiency.Light as shown in solid line part in Fig. 1, optical alignment parts 3 receive the light that sees through optical mirror slip again, and the light that sees through optical mirror slip 2 is converted to parallel emergent ray, have realized the collimation of light.
Optical glass is to mix by special formulation with the oxide of high purity silicon, boron, sodium, potassium, zinc, lead, magnesium, calcium, barium etc., high temperature melt in platinum crucible, stirs with ultrasonic wave, and bubble degass, then through long-time cooling lentamente, form, avoided producing in glass blocks internal stress.Cooled glass blocks, also will measure through optical instrument, and checks purity, transparency, the uniformity, refractive index and dispersive power whether to close specification, and optical glass has the advantages such as processability is good, the life-span is long, can also coordinate plated film to use.Therefore the optical mirror slip 2 that, uses optical glass to produce has stable in properties, is difficult for oxidized feature.
Preferably, the optical alignment parts 3 of the present embodiment are less than 1 millimeter with the focal length of the lens set that described optical mirror slip forms, and the distance between optical mirror slip 2 and optical alignment parts 3 is less than 1.5 millimeters.Concrete, optical alignment parts 3 can be convex lens structures, can be also month dental mirror structure or concavees lens structure or aspherical mirror structure, preferably convex lens structures.
Optical mirror slip 2 in the present embodiment can be specially convex lens structures or month dental mirror structure or concavees lens structure or aspherical mirror structure, and Fig. 6 is that optical mirror slip is the schematic diagram of month dental mirror structure and non-spherical structure.Further, be better converging ray, optical alignment parts 3 can arrange more than two or two, as shown in Figure 7, optical alignment parts 3 are provided with two, preferably comprise at least one aspherical mirror, are convenient to dispersion angle and the light-emitting area of optimization irradiating light beam.
As one embodiment of the present invention, optical mirror slip 2 may further be planoconvex spotlight, and planar section contacts with phosphor powder layer 12, has further completely cut off contacting of fluorescent material and air, prevent that phosphor powder layer 12 is contaminated and be oxidized, extending the service life of fluorescent wheel.Because fluorescent material is when being subject to excitation beam effect, itself has also produced a large amount of heats, than original technology, mainly lean on substrate 11 heat conduction, in the present invention, eyeglass has also played the effect of conduction fluorescent material heat, reduced the operating temperature of fluorescent material, increase substantially the life-span of fluorescent wheel 1, and then extended the life-span of projector.In addition, optical mirror slip 2 also can and fluorescent wheel 1 between retain certain gap.
The microlens array structure that optical mirror slip 2 in the present embodiment can also be comprised of convex lens structures or month dental mirror structure or concavees lens structure or aspherical mirror structure, as shown in Figure 3.Than traditional lens arrangement, microlens array can design less aberration, thinner thickness under same equivalent focal length, so microlens array is for compression light beam dispersion angle, reduces eyeglass volume and cost and all has very great help.
Further, the substrate 11 of the present embodiment is provided with Baltimore groove, and phosphor powder layer 12 is positioned at Baltimore groove, therefore, through the exciting light of phosphor powder layer 12, when arriving substrate 11, be subject to Baltimore groove curved surface effect and assemble.Substrate 11 in the present embodiment can be selected reflection-type substrate, and metal substrate for example, with better converging ray.In addition, Baltimore groove can be the above Baltimore groove with one heart of two rings or two rings.
Preferably, as shown in Figure 4, the thickness of the degree of depth of Baltimore groove and phosphor powder layer 12 is identical or lower than the thickness of phosphor powder layer 12, like this, optical mirror slip 2 just can be sealed in phosphor powder layer 12 in Baltimore groove completely, avoids phosphor powder layer 12 oxidation occurs and polluted because contacting with air.Baltimore groove and lens play the effect of converging ray jointly.
Further, as shown in Figure 5, for better assembling the light through phosphor powder layer 12, the present embodiment is equipped with the sub-optical mirror slip 13 of several parabolic shape at Baltimore groove intermediate reach.Preferably, sub-optical mirror slip 13 is microlens array structure.
Further, for reaching better spotlight effect, phosphor powder layer 12 is positioned at the focus place of the curved surface of Baltimore groove.
Further, the substrate 11 in the present embodiment can be transmission-type substrate, as shown in Figure 8.First first optical alignment parts are converged to the exciting light of parallel incident a little hot spot point with first optical mirror slip and are irradiated on phosphor powder layer 12.The light producing after optical mirror slip 2 can gather phosphor powder layer 12 again and is stimulated, and then by second optical alignment parts 3, the light that sees through optical mirror slip 2 is converted to parallel emergent ray.The principle that collimation is assembled, with above-mentioned reflection-type substrate, does not repeat them here.In addition, optical mirror slip 2 and at least one optical alignment parts 3, also can be designed to the structure of the lens set that can independently install.
Further, be better optically focused and printing opacity, optical mirror slip 2 and substrate 11 all can plate one deck highly reflecting films and anti-reflection film.
The present embodiment also provides a kind of projector, comprises above-described fluorescent wheel system.Above-mentioned fluorescent wheel system can be applied in the projector of various different frameworks, belongs to technology as well known to those skilled in the art, does not repeat them here.
The present embodiment also provides a kind of light method that collimation is assembled, and it should be noted that, the method for the present embodiment adopts above-mentioned fluorescent wheel system, and take that substrate 11 describes as reflection-type substrate as example, as shown in Fig. 1 and Fig. 9.
Step 101, optical alignment parts and optical mirror slip be the exciting light of converging parallel incident successively, form incident light source, described optical mirror slip is assemblied in the place ahead of described fluorescent wheel, and between described optical alignment parts and described phosphor powder layer, the focus of the lens set that described optical alignment parts and described optical mirror slip form is positioned on phosphor powder layer;
Step 102, optical mirror slip are assembled the light producing after described incident light source excites described phosphor powder layer;
Step 103, optical alignment parts receive the light that sees through described optical mirror slip, and the described light that sees through described optical mirror slip is converted to parallel emergent ray.
Light as shown in dotted portion in Fig. 1, the exciting light of parallel incident is first through the convergence of optical alignment parts 3, pass through again the convergence of optical mirror slip 2, the lens set that optical alignment parts 3 and optical mirror slip 2 form can be converged to directional light a very little hot spot point, the exciting light that is about to parallel incident is focused at the focal position of the lens set of optical alignment parts 3 and optical mirror slip 2 compositions, form incident light source, wherein, focus is just positioned on phosphor powder layer, the exciting light of parallel like this incident is through twice convergence, finally on phosphor powder layer 12, be converged to a small light spot.After projector starts working, along with the rotation of fluorescent wheel, the position of relatively static incident light source fluorescence excitation bisque is in continuous variation.The light producing after phosphor powder layer in excitation light spot is stimulated is to all directions outgoing.As one embodiment of the present invention, substrate is reflection-type substrate, and therefore, with the reflex change direction of exciting light emergent light in the same way due to substrate, the Integral luminous angle that makes fluorescent material is space 180 degree.Obviously, for the optical mirror slip of same diameter, nearer apart from fluorescent wheel, the luminous energy of convergence is just more, because the present invention has directly been assemblied in optical mirror slip on fluorescent wheel, so most emergent lights has obtained collection, has improved collection efficiency.Light as shown in solid line part in Fig. 1, optical alignment parts receive the light through optical mirror slip again, and the light that sees through optical mirror slip is converted to parallel emergent ray, have realized the collimation of light.
Further, the focal length of the lens set that optical alignment parts and optical mirror slip form is less than 1 millimeter, and the distance between described optical mirror slip and described optical alignment parts is less than 1.5 millimeters.
In the present embodiment, the operation principle of optical mirror slip and optical alignment parts, with above-mentioned fluorescent wheel system, does not repeat them here.In addition, for substrate, be the situation of transmission-type substrate, the method for the present embodiment is applicable too.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (8)
1. a fluorescent wheel system, it is characterized in that, comprise fluorescent wheel, optical mirror slip and at least one optical alignment parts, described optical mirror slip is assemblied on described fluorescent wheel, described fluorescent wheel comprises that substrate and annular are coated on the phosphor powder layer on described substrate, described optical mirror slip is for assembling the light that described phosphor powder layer is excited rear generation, and described optical alignment parts assemble for collimating the light that sees through described optical mirror slip;
Described substrate is provided with Baltimore groove, and in order to assemble the light that sees through phosphor powder layer, described phosphor powder layer is positioned at described Baltimore groove;
The degree of depth of described Baltimore groove lower than or equal the thickness of described phosphor powder layer, described optical mirror slip is sealed in described phosphor powder layer in described Baltimore groove completely.
2. fluorescent wheel system according to claim 1, is characterized in that, described optical mirror slip is convex lens structures or month dental mirror structure or aspherical mirror, or the microlens array structure being comprised of miniature convex lens or miniature month odontoscope.
3. fluorescent wheel system according to claim 1, is characterized in that, described optical alignment parts are specially convex lens structures or month dental mirror structure or aspherical mirror.
4. fluorescent wheel system according to claim 1, is characterized in that, described Baltimore groove intermediate reach is equipped with the sub-optical mirror slip of several parabolic shape, and described sub-optical mirror slip is microlens array structure.
5. fluorescent wheel system according to claim 1, is characterized in that, described substrate is reflection-type substrate.
6. according to the fluorescent wheel system described in right 1, it is characterized in that, the focal length of the lens set that described optical alignment parts and described optical mirror slip form is less than 1 millimeter, and the distance between described optical mirror slip and described optical alignment parts is less than 1.5 millimeters.
7.Yi Zhong projector, is characterized in that, comprises the fluorescent wheel system described in claim 1-6 any one.
8. the method that light collimation is assembled, is characterized in that, comprising:
Optical alignment parts and optical mirror slip be the exciting light of converging parallel incident successively, form incident light source, described optical mirror slip is assemblied on fluorescent wheel, and between described optical alignment parts and phosphor powder layer, the focus of the lens set that described optical alignment parts and described optical mirror slip form is positioned on phosphor powder layer; The substrate of described fluorescent wheel is provided with Baltimore groove, in order to assemble the light that sees through described phosphor powder layer, described phosphor powder layer is positioned at described Baltimore groove, the degree of depth of described Baltimore groove lower than or equal the thickness of described phosphor powder layer, described optical mirror slip is sealed in described phosphor powder layer in described Baltimore groove completely;
Optical mirror slip is assembled the light producing after described incident light source excites described phosphor powder layer;
Optical alignment parts receive the light that sees through described optical mirror slip, and the described light that sees through described optical mirror slip is converted to parallel emergent ray.
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| CN201210062256.6A CN102620244B (en) | 2012-03-09 | 2012-03-09 | Fluorescent wheel system, projector and light collimation and convergence method |
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| CN201210062256.6A CN102620244B (en) | 2012-03-09 | 2012-03-09 | Fluorescent wheel system, projector and light collimation and convergence method |
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| JP6394076B2 (en) * | 2014-06-04 | 2018-09-26 | セイコーエプソン株式会社 | Light source device and projector |
| CN105698070A (en) * | 2016-03-25 | 2016-06-22 | 苏州科医世凯半导体技术有限责任公司 | Long-distance projection lamp based on fluorescence excitation |
| CN107166179A (en) * | 2017-06-14 | 2017-09-15 | 杨毅 | Light fixture |
| CN109375462A (en) * | 2018-10-15 | 2019-02-22 | 电子科技大学 | A kind of New Projection Display light-source structure of small size |
| CN115248527A (en) * | 2021-04-26 | 2022-10-28 | 成都极米科技股份有限公司 | Light source device and projection equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101639195A (en) * | 2008-07-29 | 2010-02-03 | 红蝶科技(深圳)有限公司 | Light-emitting diode light source device and liquid crystal projecting device using same |
| CN101936505A (en) * | 2009-06-30 | 2011-01-05 | 卡西欧计算机株式会社 | Fluorescence wheel and light supply apparatus, projecting apparatus |
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| CN1916485A (en) * | 2005-08-16 | 2007-02-21 | 株式会社东芝 | Illuminator, led illuminator, and imaging device with illuminator |
| JP5370764B2 (en) * | 2009-09-15 | 2013-12-18 | カシオ計算機株式会社 | Light source device and projector |
| JP5500341B2 (en) * | 2009-10-28 | 2014-05-21 | カシオ計算機株式会社 | Light source unit and projector |
| CN201984274U (en) * | 2011-03-18 | 2011-09-21 | 红蝶科技(深圳)有限公司 | Phosphor-based multi-pump light source and projecting optical engine adopting multi-pump light source |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101639195A (en) * | 2008-07-29 | 2010-02-03 | 红蝶科技(深圳)有限公司 | Light-emitting diode light source device and liquid crystal projecting device using same |
| CN101936505A (en) * | 2009-06-30 | 2011-01-05 | 卡西欧计算机株式会社 | Fluorescence wheel and light supply apparatus, projecting apparatus |
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Commission number: 4W104241 Conclusion of examination: Claims 1-3, 5, 6, 8, including claims 1-3, 5, 6, 7 of the claims 7 invalid, in the claim 4, including claims 4 of the right to maintain the patent on the basis of validity. Decision date of declaring invalidation: 20161115 Decision number of declaring invalidation: 30481 Denomination of invention: Fluorescent wheel system, projector and light collimation and convergence method Granted publication date: 20140910 Patentee: HISENSE Co.,Ltd. |