CN106444239A - Illuminating device, lighting fitting, projection display device - Google Patents

Illuminating device, lighting fitting, projection display device Download PDF

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Publication number
CN106444239A
CN106444239A CN201510469499.5A CN201510469499A CN106444239A CN 106444239 A CN106444239 A CN 106444239A CN 201510469499 A CN201510469499 A CN 201510469499A CN 106444239 A CN106444239 A CN 106444239A
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CN
China
Prior art keywords
light
shell
optical
emitting
laser
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CN201510469499.5A
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Chinese (zh)
Inventor
杨毅
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杨毅
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Priority to CN201510469499.5A priority Critical patent/CN106444239A/en
Publication of CN106444239A publication Critical patent/CN106444239A/en

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Abstract

The invention discloses an illuminating device, a lighting fitting, and a projection display device. The illuminating device comprises a laser source, a wavelength conversion device, and an optical system. The optical system is constituted by at least one optical element. The laser emitted by the laser source is irradiated on the wavelength conversion device, and the wavelength conversion device is used to convert the incident laser into stimulated light, which is emitted. The illuminating device also comprises a housing, which is formed by splicing at least two housing assemblies together, and is used to enclose the laser source, the wavelength conversion device, and the optical system. All of channels in the housing used for communicating the inner side of the housing and the outer side of the housing are closed. According to the illuminating device, all of the channels in the housing used for communicating the inner side of the housing and the outer side of the housing are closed, and therefore service lifetime is long.

Description

Light-emitting device, light fixture and projection display equipment

Technical field

The present invention relates to light source field, more particularly to light-emitting device and the light fixture using this light-emitting device and projection display equipment.

Background technology

At present, the fluorescent material rotating disk that laser excitation rotates produces the fluorescence of timesharing, and this method is compared to be widely used in Projection Display industry.This scheme due to using all solid state luminescent material therefore in theory service life very high, tens thousand of hours can be reached.But the situation of reality is, the service life of the light source that this method manufactures is only thousands of hours, and really long-life light source product scheme does not occur all the time.

Content of the invention

In order to solve above-mentioned laser fluorescence powder light source(Below also abbreviation LASER Light Source)Service life problem, the present invention propose a kind of light-emitting device, including lasing light emitter, Wavelength converter and optical system, optical system is made up of at least one optical element;Incident laser is converted to Stimulated Light outgoing in Wavelength converter, Wavelength converter by the laser light incident that wherein lasing light emitter sends.Light-emitting device also includes shell, and this shell is assembled by least two casing assemblies, for covering on lasing light emitter, Wavelength converter and optical system inside it.Its inside and outside all channel enclosed of connection on shell.

The present invention also proposes a kind of light fixture, including above-mentioned light-emitting device as its luminous source.

The present invention also proposes a kind of projection display equipment, including above-mentioned light-emitting device as its luminous source.

In the light-emitting device of the present invention, due to its inside and outside all channel enclosed of connection on shell, therefore service life is very long.

Brief description

Fig. 1 is the structural representation of the light-emitting device of first embodiment of the invention;

Fig. 2 and Fig. 3 is the experimental result schematic diagram of inventor.

Specific embodiment

As described in the background art, the service life of existing laser fluorescence powder light source all only thousands of hours., to carrying out substantial amounts of analysis using the scialyscope product of the representative manufacturer of this light source in the market, partial list is as follows for inventor(Data ends on June 30th, 2015):

Manufacturer Model Life of product Casio XJ-A141 4500 Casio XJ-A300WS 4500 Casio XJ-M250 4500 Bright base LX60ST 3000 Letter closes Aurora 4000 Depending on U.S. happy SML-PF500 4000 AVANZA HD7 6000 Ou Silang Light source P1 3500 Ou Silang Light source P2 3000 LG Hecto laser television 5500 Instrument electricity electronics INESA laser television 3500

Although target service life reaches 20,000 hours or even longer in the specification of a lot of products, the situation that there are a large amount of false propagandas with regard to service life can be seen from measured data.The publicity measures of the certainly this marketization do not need here discussion.Can see from upper table, there is presently no the theoretical service life that a laser product can reach tens thousand of hours.

In fact, for the service life extending LASER Light Source product, industrial circle has spent substantial amounts of time, manpower and materials studying, and also achieves some achievements in research.Research find, 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, finally drop to initial luma values half when, according to standard think service life end.In order to prevent dust accretions it is thus proposed that light source is carried out with " sealing " to prevent the dust in the external world from entering light source internal, and make shell by light source " sealing " inside it, testing the life-span has been lifted, but is lifted not notable.Also someone is according to proposing light source is carried out " airtight " encapsulation as a same reason, but test life-span still only thousands of hours.

Inventor just so " seals " and " airtight " scheme has done corresponding experiment, and experimental result is identical with forefathers' conclusion.Experimental result is as shown in Figure 2.Inventors tested a large the light source service life in the case of three kinds.The first situation is that light source opens wide, and light path exposes aerial situation, and now light source service life is 1200 hours.Second situation is light source " sealing ", is got up with multiple casing assembly assembly and for light path to be enclosed in inside, and now light source life is 3000 hours.The third situation is encapsulation " airtight " to light source, and that is, with rubber ring pad in casing assembly stitching portion, now light source life is 5000 hours.For second situation and the third situation, Quantitative Comparison for convenience, it is connected with outer casing component internal and the ratio of the outside area of section of passage and casing assembly inner surface area that inventor defines " aisle spare ratio ", the passage of wherein connected with outer casing component internal and outside refers to gap between splicing gap, screw hole and the screw of casing assembly etc., also includes the hole for cabling;It is appreciated that aisle spare ratio is very little numerical value.Fig. 2 illustrate second situation and in the case of the third light source service life and aisle spare ratio relation.For second situation, for 0.1%, corresponding to the situation of A point in Fig. 2, now light source life is 3000 hours to inventor's estimation aisle spare ratio;And due to employing rubber ring in the third situation, than significantly dropping to 0.002%, this corresponds to the situation of B point in Fig. 2 to aisle spare, light source life is 5000 hours.

It will be seen that aisle spare is longer than the service life of more small light source from Fig. 2, it is more good that this can be understood as light source seal degree, enters into that dust is fewer, and the service life of light source is extended.But it is that, even with rubber ring by aisle spare than significantly have dropped 98%, the life-span also only extended to 5000 hours from 3000 hours, and tens thousand of hours in Distance Theory life-span greatly differ from each other that let us is brought down.If according to the trend of in figure A and B point, even if aisle spare is than for 0, the service life of light source there will not be too big raising.

On the other hand, LASER Light Source is long-time remains stationary state in use, and the dust of in the air is to be difficult to rely on random motion to pass through very narrow and small passage in this case(Gap for example between screw hole and screw)And enter in light path.This can be proved with famous " experiment of gooseneck flask ".In the experiment of gooseneck flask, meat soup is divided into two parts by biologist, and portion puts uncovered flask into, and portion puts gooseneck flask into, and the air in gooseneck flask is communicated by cygneous bending channel with the external world.Several days afterwards, and the meat soup in uncovered flask is putrid and deteriorated, and the meat soup in gooseneck flask is still limpid afterwards in 4 years.Biologist concludes that the antibacterial making meat soup putrid and deteriorated is not spontaneous in meat soup according to this, but waft into meat soup and multiply from the air.Likewise, this experiment also illustrates, actionless there is no disturbance in the environment of, extraneous antibacterial is can not to enter into flask interior by the bending channel of gooseneck flask, certainly dust just more cannot because dust is more much bigger than antibacterial, random motion is more difficult.Compared with the experiment of gooseneck flask, in our experiment, connection enclosure and outside passage will more narrow and small much, much smaller more than the cervical region of gooseneck flask, and often bending several times, outside dust should be difficult to enter into light path by passage in this case.

Therefore, based on the above analysis to experimental result with according to " " the technical Analysis made tested by gooseneck flask, prevent the technological means that dust enters light path from light source service life can only be hindered not yet to be found the reason being unable to reach theoretical value life-span upgrading to 5000 hours.

However, by the unremitting effort of inventor, this problem has obtained satisfactory answer finally.

Experiment is gone on by inventor according to the thinking continuing to reduce aisle spare ratio, and the conclusion obtaining is unexpected.On the basis of using rubber ring, inventor sticks adhesive tape on light shell outer cover parts assembling gap, is also thoroughly shut screw hole with adhesive tape simultaneously, and measures the life-span of light source again, service life now reaches 15000 hours, and this corresponds to the situation of C point in Fig. 3.May be pasted not strongly and the situation of gas leakage for adhesive tape(Estimate aisle spare ratio for 0.0001%), passage inside and outside for all possible connected with outer casing further shut by inventor using fluid sealant(Think now aisle spare ratio for 0, that is, passage completely encloses), in this case the service life of testing light source reached 30000 hours, this correspond to Fig. 3 in D point situation.Tetra- kinds of situations of A-D are drawn in together it can be seen that the service life of light source becomes very sensitive in aisle spare than during less than 0.002% Fig. 3, when aisle spare is than for 0(The namely situation of D point)The service life of Shi Guangyuan can reach theoretic tens of thousands of hour.

The prejudice of " dust is difficult to by catwalk on shell " has also been broken in the experiment of inventor.Trace it to its cause, inventor's conjecture is because inside LASER Light Source it being heating, origin of heat converts it is also possible to derive from the Weak Absorption for laser for the optical element in the light of fluorescent material.In a word, the temperature of light source internal can be higher than ambient temperature 20-40 degree even more high.Actually just it is unsatisfactory for the static undisturbed condition of " experiment of gooseneck flask " in this case, temperature difference meeting build-up of pressure inside and outside light source is poor, the power that air-flow passes through slype on shell namely can be formed, such dust may be followed air-flow and be entered in light path.

Inventor reaches a conclusion according to above-mentioned experiment, will realize the theoretical life-span of laser fluorescence powder light source, then connecting inside and outside all passages on its shell needs to close.Compared with this " sealing " and " airtight " of proposing with forefathers, it is the difference on seal degree." sealing " explanation in dictionary is tight closing, not further specified as precision;And " airtight " explanation in dictionary is " to refer to not leak(Thoroughly)Gas, prevents entrance or the destruction of gas, closely air tight or close to air tight ", also the degree preventing gas is not limited, and the above-mentioned experiment of inventor exactly illustrates that the degree sealing is the key factor of impact laser fluorescence powder light source service life.It can be said that compared with " sealing " and " airtight ", the solution of inventor is the change of the amount on seal degree, but but cause the raising of the matter of laser fluorescence powder light source service life.

Although forefathers propose the imagination that dust causes the decline of LASER Light Source life-span, under the trend guiding represented by Fig. 2, under the hypothesis that can not pass through narrow curved passage to dust, do not further enhance sealing to verify its service life.Another hindering factor is to want to further enhance sealing, conventional rubber ring is not enough, this is because the casing assembly of LASER Light Source often shape is very complicated, its assembled seam shape is irregular, and rubber ring is difficult to accomplish channel enclosed, often still has gap.Accomplish channel enclosed, generally require to seal passage using adhesive tape or colloid, this not only considerably increases process complexity, and careless manipulation can also affect on the radiating of whole light source, and engineers and technicians typically do not consider this way.

Inventor's the results show is by the necessity of channel enclosed inside and outside for cage connection.On the basis of here understanding, in order to realize the long-life of really tens thousand of hours, realize the brought technical problem of closing(Such as process complexity etc.)Reform into soluble engineering problem.

In order to prove the credibility of inventor's experimental data, the method for testing of inventor service life is described below.Inventor light source to be measured or scialyscope is placed on apart from the local of 2 meters about of wall and just wall is being irradiated, one hot spot of formation;Konica Minolta CL200 illumination meter is fixed on hot spot central authorities, whole system remains stationary for a long time, and records the number of degrees of illumination meter daily.In data processing, the change of daily temperature is done compensation deals to eliminate the impact of temperature.Each sample test reaches 2000 hours, calculates service life according to the degree declining.Method of testing is very reliable and stable, and test data has very high credibility.Due to nearly three months each sample test time, inventor's here experimentally took a significant amount of time and energy, and problem satisfactorily resolves the most at last.

Based on described above, the present invention proposes a kind of light-emitting device, and its structural representation is as shown in Figure 1.This light-emitting device includes lasing light emitter 101, Wavelength converter 114 and optical system, and optical system includes optical element 111,112 and 113.The laser 141 that wherein lasing light emitter 101 sends is incident in Wavelength converter 114 after sequentially passing through optical filter 111 and focus lens group 112 and 113, incident laser 141 is converted to Stimulated Light 142 by Wavelength converter, and this Stimulated Light 142 is reflected and outgoing by optical filter 111 after focus lens group 112 and 113 collection.This light-emitting device also includes shell, and this shell is assembled by casing assembly 121,122 and 123, and wherein 123 is the light exit of whole light-emitting device.The mutually assembled space forming a closing of each casing assembly, lasing light emitter 101, Wavelength converter 114 and optical system are covered on inside it.Its inside and outside all channel enclosed of connection on this shell.

According to explanation above; in the present embodiment; due to its inside and outside all channel enclosed of connection on shell; heat produced by Wavelength converter and optical system is not enough to form airflow with outside inside the housing; the internal light path of light-emitting device just receives proofing dust and protecting, therefore has very long service life.

Optical system is made up of multiple optical elements in the present embodiment, and actually optical system should at least include an optical element.In the present embodiment, incident laser is converted to Stimulated Light outgoing in Wavelength converter, Wavelength converter by the laser light incident that lasing light emitter sends, and optical system plays the effect of direct light in the optical path.Such system design has a variety of selections, and here is without exclusive list.In the present embodiment, shell includes three casing assemblies;Shell should at least include two casing assemblies in actual applications, so could be assembled and cover on lasing light emitter, Wavelength converter and optical system inside it.

The method connecting its inside and outside all channel enclosed on shell can be to fill colloid in the channel.This can coat colloid in seam crossing in advance in package shell assembly and fit together, can also be first fit together after do not needed the place of gluing to stick up with adhesive tape integrally to put into light-emitting device in colloid groove again and wrap up in one layer of glue again in seam crossing gluing or after first fitting together.The method connecting its inside and outside all channel enclosed on shell be can also be masking tape on the corresponding position of passage.Certainly, if the seam of casing assembly is regular shape, this seam can also be realized using rubber ring closing.For screw hole, in addition to closing using colloid and adhesive tape, plastics screw can also be used, realize closing using the deformation of plastics screw.

To the judgement whether its inside and outside all passage is closed is connected on the shell of light-emitting device, multiple methods can be adopted.Method with observing, if the possibility on the shell of light-emitting device connects its inside and outside passage(The such as screw hole on gap and casing assembly between casing assembly)All seal colloid or pasted adhesive tape, then it is considered that these passages all enclose.Certainly most of passage sealing matter or tape, the passage of part regular shape is also possible using plastics or rubber ring/pad.Judge very simple with the method observed it is contemplated that the effect of channel enclosed herein is to prevent fine dust from flowing into, still fall within the closing of macroscopic aspect rather than microcosmic point, the method for therefore observation is often effective.

The mode that can also be judged with effect.For example light-emitting device enclosure can be poured into water, observe whether water in 30 seconds can flow out from case surface or ooze out, without channel enclosed then can be considered as.Note that and carry out closing using adhesive tape, use ethanol with caution and detected, because the colloid that ethanol can be partly dissolved on adhesive tape causes to leak.Another kind of determination methods are that light-emitting device enclosure is added 1.05 atmospheric pressure(Plus 1.05 atmospheric pressure can be considered as the simulation to air pressure during light-emitting device internal high temperature)And put in shallow water, observe whether light-emitting device shell in 30 seconds has minute bubbles to be formed or whether have bubble to emerge, without then being considered as channel enclosed.Both judgment modes are also easier to operate.Certainly also have other judgment modes, do not enumerate herein.

In the present embodiment, Wavelength converter 114 includes wavelength convert rotating disk 114, and this rotating disk at least includes a wavelength-converting region, and this wavelength-converting region is used for receiving at least part of laser and being converted into Stimulated Light 142.Wavelength convert rotating disk is driven uniform rotation by motor 115 so that laser optical path is periodically passed through in wavelength-converting region.Multiple areas can be included on wavelength convert rotating disk, thus can drive with motor and rotate and timesharing produces different colours light.

Drives line 115a of motor 115 is also depict, this drives line is exposed through shell, so that can external drive in Fig. 1.This can bore a hole on shell and drives line is passed through, and is then closed hole with colloid.

In the present embodiment, the outer surface of shell includes radiating area, for radiating for shell.The casing part of such as next-door neighbour's lasing light emitter 101 can be just radiating area, is easy to as laser source heat-dissipating.The casing part that for example adjacent wavelengths change rotating disk 114 again can also be radiating area, be easy to radiate for wavelength convert rotating disk.Colloid can not be put on radiating area nor tape, in order to avoid impact radiating effect.Will consider to have in design therefore on radiating area and connect inside and outside passage, such as seam of screw hole or different casing assembly etc..

The present invention also proposes a kind of light fixture, including above-mentioned light-emitting device as its luminous source.

The present invention also proposes a kind of projection display equipment, including above-mentioned light-emitting device as its luminous source.

The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; equivalent structure or equivalent flow conversion that every utilization description of the invention and accompanying drawing content are made; or directly or indirectly it is used in other related technical fields, it is included within the scope of the present invention.

Claims (6)

1. a kind of light-emitting device it is characterised in that:
Including lasing light emitter, Wavelength converter and optical system, optical system is made up of at least one optical element;Incident laser is converted to Stimulated Light outgoing in Wavelength converter, Wavelength converter by the laser light incident that wherein lasing light emitter sends, and optical system plays the effect of direct light in the optical path;
Also include shell, this shell is assembled by least two casing assemblies, for covering on lasing light emitter, Wavelength converter and optical system inside it;Its inside and outside all channel enclosed of connection on described shell.
2. light-emitting device according to claim 1 is it is characterised in that its inside and outside passage of connection on shell is filled with to connect in colloid, or shell and is coated with adhesive tape on its corresponding position of inside and outside passage.
3. light-emitting device according to claim 1 and 2, it is characterised in that described Wavelength converter includes wavelength convert rotating disk, this rotating disk at least includes a wavelength-converting region, and this wavelength-converting region is used for receiving at least part of laser and being converted into Stimulated Light;Wavelength convert rotating disk uniform rotation is so that laser optical path is periodically passed through in wavelength-converting region.
4. light-emitting device according to claim 1 is it is characterised in that the outer surface of described shell includes radiating area, for radiating for shell.
5. a kind of light fixture is it is characterised in that include light-emitting device according to any one of claim 1 to 4 as its luminous source.
6. a kind of projection display equipment is it is characterised in that include light-emitting device according to any one of claim 1 to 4 as its luminous source.
CN201510469499.5A 2015-08-04 2015-08-04 Illuminating device, lighting fitting, projection display device CN106444239A (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101038429A (en) * 2006-03-15 2007-09-19 船井电机株式会社 Projection apparatus
CN202351605U (en) * 2011-10-31 2012-07-25 深圳市欧曼特微显示科技有限公司 Projector and radiating device
CN103807810A (en) * 2012-11-14 2014-05-21 深圳市光峰光电技术有限公司 Wavelength conversion device and related light-emitting device
CN103885274A (en) * 2012-12-20 2014-06-25 深圳市光峰光电技术有限公司 Light emitting device and related projection system
US20140198304A1 (en) * 2013-01-17 2014-07-17 Hon Hai Precision Industry Co., Ltd. Projector with fan and heat sinks
JP2014174221A (en) * 2013-03-06 2014-09-22 Nippon Seiki Co Ltd Light source device
WO2014171150A1 (en) * 2013-04-18 2014-10-23 パナソニック株式会社 Projection-type image display device
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

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101038429A (en) * 2006-03-15 2007-09-19 船井电机株式会社 Projection apparatus
CN202351605U (en) * 2011-10-31 2012-07-25 深圳市欧曼特微显示科技有限公司 Projector and radiating device
CN103807810A (en) * 2012-11-14 2014-05-21 深圳市光峰光电技术有限公司 Wavelength conversion device and related light-emitting device
CN103885274A (en) * 2012-12-20 2014-06-25 深圳市光峰光电技术有限公司 Light emitting device and related projection system
US20140198304A1 (en) * 2013-01-17 2014-07-17 Hon Hai Precision Industry Co., Ltd. Projector with fan and heat sinks
JP2014174221A (en) * 2013-03-06 2014-09-22 Nippon Seiki Co Ltd Light source device
WO2014171150A1 (en) * 2013-04-18 2014-10-23 パナソニック株式会社 Projection-type image display device
CN104635410A (en) * 2013-11-12 2015-05-20 株式会社理光 Light source apparatus and image projection apparatus
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

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Application publication date: 20170222