CN105319824A - Light-emitting device and projection display device - Google Patents
Light-emitting device and projection display device Download PDFInfo
- Publication number
- CN105319824A CN105319824A CN201510753107.8A CN201510753107A CN105319824A CN 105319824 A CN105319824 A CN 105319824A CN 201510753107 A CN201510753107 A CN 201510753107A CN 105319824 A CN105319824 A CN 105319824A
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- China
- Prior art keywords
- light
- emitting device
- laser
- air
- porosint
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Classifications
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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
Abstract
The invention provides a light-emitting device and a projection display device. The light-emitting device comprises a laser source, an optical system, a porous material, a housing and a blowing device, wherein the optical system comprises at least one optical element, and is used for guiding laser emitted by the laser source; the housing is formed by splicing at least two housing components and is used for enclosing the laser source, the optical system and the porous material therein; and the blowing deice is located in the housing and is used for blowing airflow towards the porous material. Dust enters a shell, is blown to the surface and the inside of the porous material along with the airflow formed by the blowing device, and is adsorbed by the porous material, so that the probability that the dust is adsorbed on an optical element in the optical system is lowered; and the service lifetime of the light-emitting device is prolonged.
Description
Technical field
The present invention relates to light source field, particularly relate to the projection display equipment of light-emitting device and this light-emitting device of use.
Background technology
At present, the fluorescent powder rotating disk that laser excitation is rotated produces the fluorescence of timesharing, and this method has been compared to be widely used in Projection Display industry.This scheme due to use all solid state luminescent material therefore in theory serviceable life very high, can tens thousand of hours be reached.But the situation of reality is, the serviceable life of the light source of this method manufacture is only thousands of hours, and real long-life light source product scheme does not occur all the time.
Summary of the invention
In order to solve the problem in serviceable life of above-mentioned LASER Light Source, the present invention proposes a kind of light-emitting device, comprises lasing light emitter, optical system and porosint, and optical system is made up of at least one optical element, the laser sent for guiding lasing light emitter; Also comprise shell, this shell is assembled by least two casing assemblies, for lasing light emitter, optical system and porosint being closed therein; Also comprise the air-blast device being positioned at shell, for air-flow is blowed to porosint.
The present invention also proposes a kind of projection display equipment, comprises above-mentioned light-emitting device as light source.
The specific surface area of porosint is very large, has very strong adsorption function.After dust enters into enclosure interior, the air-flow that can be formed with air-blast device be blown into porous material surface and inner and adsorb by it, thus decrease the probability being adsorbed in optical element in optical system, extend the serviceable life of light-emitting device.Experiment proves, this method can the life of light-emitting device three times.
Accompanying drawing explanation
Fig. 1 is the structural representation of the first embodiment of light-emitting device of the present invention;
Fig. 2 A is the structural representation of another embodiment of light-emitting device of the present invention;
Fig. 2 B is the front elevation of the first fin in Fig. 2 A embodiment;
Fig. 3 is the structural representation of another embodiment of light-emitting device of the present invention.
Embodiment
As described in the background art, all only thousands of hours serviceable life of existing LASER Light Source.Although on market a lot of product specification index on target to reach serviceable life 20,000 hours even longer, the situation about there is a large amount of false propaganda serviceable life can be seen from measured data.The publicity measures of certain this marketization do not need to discuss at this.
In order to extend the serviceable life of LASER Light Source product, inventor has spent a large amount of time to study.Research finds, on laser optical path, because the active optical component surface of laser easily deposits dust, the continuous accumulation of dust causes brightness and constantly reduces, and finally drops to a half of initial luma values, thinks that serviceable life ends according to standard.
In order to address this problem, light source be sealed and can prevent entering of dust in theory.But, because shell seam is a lot of and out-of-shape, be difficult to accomplish to be sealed to the degree stoping air flowing completely.Along with the faint flowing dust of light source internal and extraneous air still can progress in light path, thus light-source brightness is caused to decay.
In order to extend the life-span of light source, the present invention proposes a kind of light-emitting device, and its structural representation as shown in Figure 1.This light-emitting device comprises lasing light emitter 101, optical system and porosint 141.Optical system is made up of at least one optical element, the laser sent for guiding lasing light emitter.Optical system comprises light-dividing device 111 in the present embodiment, lens 112,113 and 114, catoptron 115, Multiplexing apparatus 116.Light-emitting device also comprises shell 121, and this shell is assembled by least two casing assemblies, for being closed therein by lasing light emitter 101, optical system and porosint 141 and 142.Light-emitting device also comprises the air-blast device 142 being positioned at shell 121, for air-flow 147 is blowed to porosint 141.
The specific surface area of porosint is very large, has very strong adsorption function.After dust enters into enclosure interior, the air-flow 147 that can be formed with air-blast device 142 be blown into porosint 141 surface and inner and adsorb by it, thus decrease the probability being adsorbed in optical element in optical system, extend the serviceable life of light-emitting device.Experiment proves, this method can the life of light-emitting device three times.
In the present embodiment, light-emitting device also comprises Wavelength converter 131, for receiving the laser 151 that lasing light emitter 101 sends, and it at least part of is converted to Stimulated Light 152.Specifically, the laser 131 that lasing light emitter 101 sends is successively through after light-dividing device 111 and lens 112 and 113, that converges is incident in Wavelength converter, the Stimulated Light 152 of Wavelength converter 131 stimulated emission is collected by lens 113 and 112 and collimates, and to reflect and from light-emitting window 122 outgoing of light-emitting device through light-dividing device 111.
In the present embodiment, Wavelength converter is reflection-type Wavelength converter, and namely Wavelength converter comprises reflected bottom plate and is attached to the wavelength conversion layer of reflected bottom plate.After laser 151 is incident in wavelength conversion layer, the Stimulated Light of wavelength conversion layer stimulated emission can be subject to the opposite direction outgoing in the impact of reflected bottom plate and the direction along laser incidence.
Employ Wavelength converter in the present embodiment, the monochromatic light of laser can be converted to the Stimulated Light even white light of wide range by it.Certainly can understand, whether use Wavelength converter not affect the above-mentioned beneficial effect of the present invention.
In the present embodiment, shell comprises laser emitting mouth (lens 113 are covered in this exit portal), and the laser that lasing light emitter sends shines housing exterior from this laser emitting mouth; Wavelength converter is positioned at the outside of shell and the laser received from the injection of laser emitting mouth.Such benefit is that Wavelength converter is independent of outside shell, easy to assembly.Certainly in practice, Wavelength converter is positioned at enclosure and is also fine, and does not also affect beneficial effect of the present invention.
In the present embodiment, Wavelength converter is wavelength convert rotating disk 131, also comprises drive unit 134 and drives it to rotate.Like this, each point on wavelength convert rotating disk can periodically be excited instead of be in the state of being excited all the time, excites sent heat to compare dispersion, thus avoids the thermal quenching effect of material for transformation of wave length.On the other hand, wavelength convert rotating disk can also be distributed with multiple district, there is not different wavelength conversion characteristics same district; Like this along with drive unit 134 drives wavelength convert dial rotation, Stimulated Light 152 presents different light characteristics, and this has special application in Projection Display.In the present embodiment, wavelength convert rotating disk comprises transmission area, when transmission area turns to the light path of laser 151, formation shoot laser 153 is also collected by lens 114 in laser light transmission area, and this shoot laser 153 is combined into a branch of outgoing through Multiplexing apparatus 116 and Stimulated Light 152 after catoptron 115 reflects.Certainly in actual applications, Wavelength converter also can be fixed Wavelength converter, and this does not affect beneficial effect of the present invention.
How the system describing the light-emitting device that is relatively commonly used in the above-described embodiments works.In fact the optical configuration of light-emitting device, the use etc. of Wavelength converter do not affect the generation of beneficial effect of the present invention, as long as suitable placing porous material use air-blast device to dry to it in the enclosure, just can reach the object in raising light-emitting device serviceable life.
The structure of another embodiment of light-emitting device of the present invention as shown in Figure 2 A.With above-described embodiment unlike, in the present embodiment, air-blast device serves the effect of wavelength convert rotating disk simultaneously.Specifically, in the present embodiment, air-blast device 230 comprises wavelength conversion layer, this wavelength conversion layer is positioned in the light path of laser 251, launches Stimulated Light 252 for absorbing laser.Concrete again, air-blast device 230 comprises reflected bottom plate 231, and wavelength conversion layer 233 is attached on a face of reflected bottom plate 231; Another face of reflected bottom plate 231 comprises the first fin 232 for air blast.
The front elevation of reflected bottom plate and the first fin as shown in Figure 2 B.Visible first fin 232 radially arranges, and like this when drive unit 234 drives reflected bottom plate 231 to rotate, the first fin 232 will produce the air-flow 247 of centrifugal direction.In the present embodiment, porosint 241 is positioned at the outside of the first fin, can be blown into the inside on the surface of porosint 241, thus reach the object of attract dust from the air-flow 247 of the first fin blowout.Relative to the embodiment of Fig. 1, the benefit of the present embodiment is wavelength convert rotating disk and air-blast device to unite two into one, thus system is simplified and cost reduction.
Preferred, in the present embodiment, on the inwall that porosint 241 is attached to shell 221 and with outer casing inner wall hot tie-in.Such benefit is, wavelength conversion layer 233 the produced heat that is stimulated can pass to air-flow 247 through reflected bottom plate 231 thus heat for air-flow 247, and this heat can be passed to porosint 241 by air-flow 247, thus be minimized from the temperature of the air-flow of porosint 247 blowout.That is, be able to be delivered to porosint from wavelength conversion layer by the transferring heat of air-flow 247.Because the inner surface heat of porosint 241 with shell 221 is connected, the heat therefore on porosint easily passes to outer cover body, so just achieves the effect into wavelength conversion layer heat radiation.Preferably, porosint is metal polyporous material, and this material has the feature of heatproof, can continue to keep stable; And metal polyporous material (such as Porous Cu) has good thermal conduction characteristic, can transfer heat to shell faster.
The structural representation of another embodiment of light-emitting device of the present invention as shown in Figure 3.With the embodiment shown in Fig. 2 A unlike, in the present embodiment, shell 321 inwall comprises the second fin 391, and air-flow 347 that air-blast device is blown out is through this second fin 391.And porosint 341 is between air-blast device and the air flow path of the second fin.Like this, air-flow 347 can first blow over porosint 341, and it is inner dust particle to be stayed porosint 341; The second fin 391 can be flow through from the air-flow of porosint blowout and heat is fully passed to the second fin 391 and case body.This structure by porosint and the second fin are combined, taken into account attract dust and be wavelength conversion layer heat radiation.
In actual applications, porosint also can be attached at least part of surface of the second fin, so also can reach same technical purpose and beneficial effect.It should be noted that in superincumbent explanation and conveniently simplify the first fin and the second fin, the first fin and the second fin all adopt and the most simply design.And in practical application the first fin and the second fin design may with explanation above and the explanation in illustrating different; but its know-why realized is identical; those skilled in the art easily explanation according to the present invention design more rationally, more efficient first fin and the second fin, this obviously all belongs to protection scope of the present invention.
The present invention also proposes a kind of projection display equipment, comprises above-mentioned light-emitting device as light source.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a light-emitting device, is characterized in that:
Comprise lasing light emitter, optical system and porosint, optical system is made up of at least one optical element, the laser sent for guiding lasing light emitter;
Also comprise shell, this shell is assembled by least two casing assemblies, for lasing light emitter, optical system and porosint being closed therein;
Also comprise the air-blast device being positioned at shell, for air-flow is blowed to porosint.
2. light-emitting device according to claim 1, is characterized in that, also comprises Wavelength converter, for receiving the laser that lasing light emitter sends, and it at least part of is converted to Stimulated Light.
3. light-emitting device according to claim 2, is characterized in that, described shell comprises laser emitting mouth, and the laser that lasing light emitter sends shines housing exterior from this laser emitting mouth; Wavelength converter is positioned at the outside of shell and the laser received from the injection of laser emitting mouth.
4. light-emitting device according to claim 1, is characterized in that, described air-blast device comprises wavelength conversion layer, this wavelength conversion layer is positioned in the light path of laser, launches Stimulated Light for absorbing laser.
5. light-emitting device according to claim 4, is characterized in that, described air-blast device comprises reflected bottom plate, and described wavelength conversion layer is attached on a face of reflected bottom plate; Another face of reflected bottom plate comprises the first fin for air blast.
6. light-emitting device according to claim 4, is characterized in that, on the inwall that described porosint is attached to described shell and with outer casing inner wall hot tie-in.
7. light-emitting device according to claim 4, is characterized in that, described outer casing inner wall comprises the second fin, and the air-flow that described air-blast device is blown out is through this second fin.
8. light-emitting device according to claim 7, is characterized in that, described porosint is between air-blast device and the air flow path of the second fin, or porosint is attached at least part of surface of the second fin.
9. light-emitting device according to any one of claim 1 to 8, is characterized in that, described porosint is metal polyporous material.
10. a projection display equipment, is characterized in that, comprises light-emitting device according to any one of claim 1 to 9 as light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510753107.8A CN105319824A (en) | 2015-11-07 | 2015-11-07 | Light-emitting device and projection display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510753107.8A CN105319824A (en) | 2015-11-07 | 2015-11-07 | Light-emitting device and projection display device |
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| CN105319824A true CN105319824A (en) | 2016-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510753107.8A Pending CN105319824A (en) | 2015-11-07 | 2015-11-07 | Light-emitting device and projection display device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101762958A (en) * | 2009-12-28 | 2010-06-30 | 深圳雅图数字视频技术有限公司 | Dust-control system of air inlet of projector and projector |
| CN102791176A (en) * | 2010-03-01 | 2012-11-21 | 伊莱克斯家用产品股份有限公司 | Projector and household appliance comprising such a projector |
| CN104162323A (en) * | 2014-07-21 | 2014-11-26 | 复旦大学 | Self-activation air filtration system |
| CN104614926A (en) * | 2014-10-28 | 2015-05-13 | 扬州吉新光电有限公司 | Wavelength conversion device with a cooling structure baseplate and light emitting device |
| CN104635410A (en) * | 2013-11-12 | 2015-05-20 | 株式会社理光 | Light source apparatus and image projection apparatus |
| CN104676492A (en) * | 2015-01-31 | 2015-06-03 | 杨毅 | Wavelength conversion device and light-emitting device |
-
2015
- 2015-11-07 CN CN201510753107.8A patent/CN105319824A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101762958A (en) * | 2009-12-28 | 2010-06-30 | 深圳雅图数字视频技术有限公司 | Dust-control system of air inlet of projector and projector |
| CN102791176A (en) * | 2010-03-01 | 2012-11-21 | 伊莱克斯家用产品股份有限公司 | Projector and household appliance comprising such a projector |
| CN104635410A (en) * | 2013-11-12 | 2015-05-20 | 株式会社理光 | Light source apparatus and image projection apparatus |
| CN104162323A (en) * | 2014-07-21 | 2014-11-26 | 复旦大学 | Self-activation air filtration system |
| CN104614926A (en) * | 2014-10-28 | 2015-05-13 | 扬州吉新光电有限公司 | Wavelength conversion device with a cooling structure baseplate and light emitting device |
| CN104676492A (en) * | 2015-01-31 | 2015-06-03 | 杨毅 | Wavelength conversion device and light-emitting device |
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Application publication date: 20160210 |
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