CN205281103U

CN205281103U - Light -emitting device and projection display device

Info

Publication number: CN205281103U
Application number: CN201520785046.9U
Authority: CN
Inventors: 杨毅
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-10-12
Filing date: 2015-10-12
Publication date: 2016-06-01
Anticipated expiration: 2025-10-12

Abstract

A light -emitting device and projection display device is proposed, including laser source and optical system, optical system comprises at least one optical element for the laser that the guide laser source sent, still include first shell, this first shell is assembled by at least two first shell subassemblies and is formed for seal laser source and optical system inside it, still include the second shell, it encloses into the enclosure space with the first shell of part jointly, with the joint sealing of first shell inter -module inside it. Laser source and optical system are sealed by first shell, and the seam on the first shell is sealed by the second shell, and this just is equivalent to that optical system has been sealed twice, and the dust just is the decline of several orders of magnitude from the external probability that gets into optical system so. The experiment also prove, like this the manufacturing the light source, its brightness decay is very slow, life prolongs greatly.

Description

Light-emitting device and projection display equipment

Technical field

This utility model relates to LASER Light Source field, particularly relates to light-emitting device and uses the projection display equipment of this light-emitting device.

Background technology

At present, the fluorescent material rotating disk that laser excitation rotates 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 service life significantly high, it is possible to reach tens thousand of hours. But the situation of reality is, the light-source brightness that this method manufactures is decayed quickly, is only actual life 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 service life of above-mentioned LASER Light Source, the utility model proposes a kind of light-emitting device, including lasing light emitter and optical system, optical system is made up of at least one optical element, for the laser that guided laser source sends; Also including the first shell, this first shell is assembled by least two the first casing assembly, for lasing light emitter and optical system being closed therein; Also including second housing, it jointly surrounds closing space with part the first shell, by the joint sealing between the first casing assembly therein.

This utility model also proposes a kind of projection display equipment, including above-mentioned light-emitting device as light source.

Lasing light emitter and optical system are by the first shell seal, and the seam on the first shell is closed by second housing, and this is equivalent to optical system and has been closed twice, then dust enters the probability of optical system just in the decline of several orders of magnitude from the external world. Experiment also demonstrates that, the light source so manufactured, and its brightness decay is very slow, and service life is greatly prolonged.

Accompanying drawing explanation

Fig. 1 is the structural representation of the first embodiment of light-emitting device of the present utility model;

Fig. 2 is the structural representation of another embodiment of light-emitting device of the present utility model;

Fig. 3 is the structural representation of another embodiment of light-emitting device of the present utility model;

Fig. 4 A is the structural representation of another embodiment of light-emitting device of the present utility model;

Fig. 4 B is the formal figure of Fig. 4 A embodiment medium wavelength conversion rotating disk and fin;

Fig. 5 is the structural representation of another embodiment of light-emitting device of the present utility model.

Detailed description of the invention

Repeatedly studying through inventor, the main cause that LASER Light Source brightness decay is fast is that dust enters in light source internal light path, is adsorbed in optical element surface and causes brightness decay under the effect of light laser. Constantly enter and be adsorbed in optical element surface along with dust, brightness can constantly decay.

In order to solve this problem, inventor attempts getting up the body seal of light source, but low effort, and the shell that reason is light source has multiple parts to be spliced, it is difficult to accomplish airtight each other, is therefore difficult to stop that short grained dust enters inside the light path of light source. And, use the material such as adhesive tape, adhesive tape between multiple parts in order to increase air-tightness, the relatively larger proportion of goods damageds can be caused when after-sales service, virtually add cost.

Finally, inventor have found solution, as described below.

The utility model proposes a kind of light-emitting device, the structural representation of its first embodiment is as shown in Figure 1. This light-emitting device includes lasing light emitter 105 and optical system, and optical system is made up of light splitting optical filter 107 and condenser lens 101, for the laser 131 that guided laser source 105 sends. Light-emitting device also includes the first shell 103, and this first shell 103 is assembled by least two the first casing assembly 1031 and 1032, for lasing light emitter and optical system being closed therein. What deserves to be explained is, in other embodiments, without drawing the first casing assembly especially, do not illustrate there is no the first casing assembly, but there is no need to particularly point out in explanation. Additionally in FIG, having obvious space between two the first casing assemblies 1031 and 1032, this is to represent the special handling conveniently done in figure, and both are closely assembled in practice.

What deserves to be explained is, repeatedly use " closings " in the description of each embodiment of the present utility model, it represents and uses conventional method the encirclement of other object therein, and and can not carry out the flowing of unobstructed gas or liquid between the external world. Such as using two casing assemblies to be assembled into a complete shell other object is closed therein, refer to two casing assemblies and be fully engaged against in design, assembled rear surface does not have obvious hole or space. In actual assembled, even if due to factors such as mismachining tolerance, material are rough so that gas or liquid can pass through assembled seam and penetrates into or ooze out, and owing to can not carry out unobstructed circulation between the external world, this complete assembled body is also close.

Light-emitting device also includes second housing 104, and it jointly surrounds closing space with part the first shell 103, by the joint sealing between the first casing assembly 1031 and 1032 therein. In the present embodiment, lasing light emitter is installed on the inwall of the first casing assembly 1031, and the first outer surface of outer cover of contiguous lasing light emitter 105 installation site is lasing light emitter radiating area 103a, and the backboard of lasing light emitter 105 is close in this lasing light emitter radiating area, and radiating effect is best. As shown in Figure 1, the part enclosure of second housing 104 and the first casing assembly 1031 fits tightly (shown in the dashed circle of lasing light emitter about 105 both sides in sticking part such as Fig. 1), outside lasing light emitter radiating area 103a is exposed to second housing, and the remainder of second housing 104 and the first shell 103 surrounds closing space jointly, by the joint sealing between the first casing assembly 1031 and 1032 therein.

In the present embodiment, also include being positioned at the Wavelength converter 102 within the first shell 103, be used for receiving laser 131 and launching Stimulated Light 132. Wavelength converter is exactly wavelength conversion layer 102 in the present embodiment. Focus on through collecting lens 101 after laser 131 transmission light splitting optical filter 107, then it is incident on wavelength conversion layer 102, wavelength conversion layer 102 is excited and launches Stimulated Light 132, Stimulated Light 132 is collected by collecting lens 101 and is collimated, after light splitting optical filter 107 reflects, successively through outgoing after the light-emitting window 103b on the first shell 103 and the light-emitting window 104b on second housing. The light of different wave length can be reflected by light splitting optical filter 107 respectively and transmission has reached to distinguish the purpose of laser and Stimulated Light light path.

In the present embodiment, lasing light emitter, optical system and Wavelength converter are by the first shell seal, and the seam of the first casing assembly on the first shell is closed by second housing, extraneous dust directly can not enter optical system from the seam between the first casing assembly, this is equivalent to optical system and has been closed twice, then dust enters the probability of optical system just in the decline of several orders of magnitude from the external world. Experiment also demonstrates that, the light source so manufactured, and its brightness decay is very slow, and service life is greatly prolonged.

It addition, second housing not all partially enclosed to the first shell, this relative to second housing completely by the first shell seal therein save material, reduce cost. And in the present embodiment, lasing light emitter radiating area 103a is exposed to outside the closing space that second housing 104 and part the first shell surround jointly, and such lasing light emitter radiating area 103a just can directly contact with the heat abstractor in the external world, and radiating effect is better.

In the present embodiment, the first shell and second housing are fixedly linked, and are so conducive to shedding of assembling product and heat. Preferably, the first shell and second housing work in-process are one-body molded. This preferred version is equally applicable to the following examples certainly.

In the embodiment shown in fig. 1, lasing light emitter radiating area is exposed to outside the closing space that second housing and part the first shell surround jointly. In actual applications, there may also be other to select, namely the other parts of the first shell can also be exposed to outside the closing space that second housing and part the first shell surround jointly, as long as second housing jointly surrounds closing space with part the first shell, by the joint sealing between the first casing assembly therein, it is possible to reach the aforesaid beneficial effect increased the service life. In another embodiment shown in Fig. 2, such as just illustrate another kind of situation.

In the light-emitting device shown in Fig. 2, the first shell 203 is assembled by the first casing assembly 2031 and 2032. With the light-emitting device shown in Fig. 1 the difference is that, the part enclosure of second housing 204 and the first casing assembly 2032 fits tightly (shown in the dashed circle of the sticking part such as upper and lower both sides of Fig. 2 medium wavelength conversion layer). Same, second housing 204 jointly surrounds closing space with part the first shell 203, by the joint sealing between the first casing assembly therein, and the part enclosure (i.e. the Wavelength converter radiating area of the first outer surface of outer cover) of next-door neighbour's wavelength conversion layer 202 of the first shell is exposed to this closing outside, such it is advantageous in that heat produced by wavelength conversion layer 202 can dissipate either directly through the heat abstractor of outside. And in the present embodiment, the lasing light emitter radiating area 203 corresponding to lasing light emitter 205 needs and second housing close contact, the housing thereby through second housing exports to the external world.

It is appreciated that, we are it is of course possible to combine the embodiment shown in Fig. 1 and Fig. 2, lasing light emitter radiating area and Wavelength converter radiating area is made to be simultaneously exposed to outside second housing, namely the remainder of second housing and the first shell collectively forms one and closes space, by the joint sealing between the first casing assembly therein. The heat of two such radiating area is directly led away such as through external radiating device. It is appreciated that, for the region that heat any on the first shell is higher, or because certain reason needs to be exposed to the region outside second housing, as long as these regions do not include the seam between casing assembly, can be exposed to when design outside the close range of second housing.

In the embodiment above, Wavelength converter is positioned at the inside of the first shell, and depends on the inwall of the first shell, and heat produced by such Wavelength converter can pass to the first shell and reach the effect of heat radiation. In another embodiment of this utility model, Wavelength converter is then positioned at outside the first shell, inside second housing.

As it is shown on figure 3, the present embodiment and the embodiment shown in Fig. 1 are distinctive in that, the first shell 303 also includes Laser output mouth 303c, laser after collecting lens focuses on from Laser output mouth 303c outgoing. Wavelength converter 302 is wavelength conversion layer, and it is positioned at the inside of second housing 304, for receiving the laser 211 from Laser output mouth outgoing and launching Stimulated Light 212. The present embodiment is identical with the operation principle of the embodiment shown in Fig. 1, the difference is that the position of wavelength conversion layer. Same, in the present embodiment, optical system is enclosed twice by the first shell and second housing, and the probability that dust enters is very low.

The structural representation of another embodiment of light-emitting device of the present utility model is as shown in Figure 4 A. Wavelength convert sabot 402a and the driving device 402c driving this wavelength convert rotating disk to rotate is included the difference is that, Wavelength converter 402 with the embodiment shown in Fig. 3. Wavelength convert rotating disk 402a includes fin 402d, for producing centrifugal air-flow 491 when wavelength convert rotating disk 402a rotates. Wavelength convert rotating disk 402a also includes the wavelength conversion layer 402b of circle distribution, after the laser excitation that wavelength conversion layer 402b is focused, launches Stimulated Light. Owing to wavelength convert rotating disk 402a rotates, each point on such wavelength conversion layer 402b is periodically irradiated by laser and excites, and this is conducive to the diffusion of wavelength conversion layer amount of localized heat.

The front view of wavelength convert rotating disk and the fin on it is as shown in Figure 4 B. Visible, fin 402d is along the circumferential direction distributed and extends in centrifugal divergent shape, it will be understood that can produce the air-flow 491 being centrifuged as the principle of centrifugal fan between fin 402d when wavelength convert rotating disk rotates. This centrifugal air-flow can take away the heat on wavelength convert rotating disk, is reached for the effect of wavelength conversion layer 402b cooling. Of course for producing centrifugal air-flow, the design of fin 402d can also is that other form, and this belongs to prior art and does not repeat herein.

In the present embodiment, at least part of inwall of the second housing 404 flowed through at air-flow 491, including the shape risen and fallen or fin 409 to increase its surface area. So, heat entrained on air-flow 491 just can pass to second housing 404 more fully, and the heat within such second housing just can be transmitted to second housing surface and outside. The fin 409 used in the present embodiment can be risen and fallen by other shape and replace, for instance bar shaped or point-like raised or sunken, can reach to increase the effect on this internal partial wall surface of second housing. Certainly even without fin 409, the heat on air-flow 491 partly can also pass to second housing.

Preferably, in the present embodiment, in the region that air-flow 491 flows through, porous material is also included. Porous material can dust in adsorption gas flow so that entering dust great majority second housing within and be adsorbed on the porous material, the probability of the optical system entering the first enclosure is further reduced. Porous material can be metal polyporous material, so may also operate as the effect of conduction heat. Certainly, porous material can also combine with the shape 409 of the fin in Fig. 4 A or fluctuating and use.

In the embodiment above, Stimulated Light is along the direction opposite direction outgoing of laser light incident. In another embodiment of light-emitting device of the present utility model, as shown in Figure 5, with the embodiment shown in Fig. 4 A the difference is that, Wavelength converter 502 includes transparent wavelength convert rotating disk 502a and wavelength conversion layer 502b thereon, wavelength conversion layer 502b can be continued to propagate along the direction of laser by Stimulated Light 532 produced after laser excitation. Second housing 504 also includes light-emitting window 504b, and Stimulated Light 532 just can through light-emitting window 504b outgoing. Light-emitting window 504b is lens, while acting on emergent light, it is possible to play the effect closing second housing. In the present embodiment, optical system only includes condenser lens 501, it is seen that optical system at least can include an optical element. It addition, with the embodiment shown in Fig. 4 A the difference is that, the wavelength convert rotating disk 502a in Fig. 5 does not have fin, this is because fin it is not necessary to, when the heat that wavelength conversion layer sends is less high, it is possible to wavelength convert rotating disk rotate in lose.

By the explanation of above multiple embodiments it can be seen that in this utility model, the light inlet of the first shell and second housing and light-emitting window have multiple probability and combination, those skilled in the art can according to practical situation designed, designed.

In the explanation of above multiple embodiments, light inlet and light-emitting window do not had special explanation, at this in the lump illustratively. In actual applications, light inlet and light-emitting window can be openings, then adopt transparent cover plate to close. Now cover plate just can be regarded as one for assembled casing assembly. It addition, such as in the embodiment shown in fig. 5, second housing just employs lens 504b as light-emitting window, and at this moment lens 504b just regards that one for assembled casing assembly as, it is ensured that the closure of shell. Still further it is possible that the first shell and/or second housing are to be made by transparent material, now avoid the need for light-emitting window or the light inlet reserving especially or process, it is not required that special cover plate, the place of light transmission is exactly light inlet or light-emitting window. Therefore, in this utility model, light inlet or light-emitting window refer to can direct light is incident or outgoing, have no effect on the first shell and the light-path of second housing closure simultaneously.

In multiple embodiments of above light-emitting device, all include Wavelength converter, this is because be in daily use at LASER Light Source medium wavelength conversion equipment, but this not represent Wavelength converter for this utility model be necessary. Even without Wavelength converter, or Wavelength converter is in the outside of second housing, and the first shell and second housing still can well protect optical system not to be subject to the absorption of extraneous dust thus keeping high efficiency.

The foregoing is only embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every equivalent structure utilizing this utility model description and accompanying drawing content to make or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, all in like manner include in scope of patent protection of the present utility model.

Claims

1. a light-emitting device, it is characterised in that:

Including lasing light emitter and optical system, optical system is made up of at least one optical element, for the laser that guided laser source sends;

Also including the first shell, this first shell is assembled by least two the first casing assembly, for lasing light emitter and optical system being closed therein;

Also including second housing, it jointly surrounds closing space with part the first shell, by the joint sealing between the first casing assembly therein.

2. light-emitting device according to claim 1, it is characterised in that described first outer surface of outer cover includes lasing light emitter radiating area, this lasing light emitter radiating area is exposed to outside the closing space that second housing and part the first shell surround jointly.

3. light-emitting device according to claim 1, it is characterised in that also include the Wavelength converter being positioned at the first enclosure, be used for receiving laser and launching Stimulated Light.

4. light-emitting device according to claim 3, it is characterised in that described first outer surface of outer cover includes Wavelength converter radiating area, this Wavelength converter radiating area is exposed to outside the closing space that second housing and part the first shell surround jointly.

5. light-emitting device according to claim 1, it is characterised in that described first shell also includes Laser output mouth, laser is from Laser output mouth outgoing; Also include the Wavelength converter being positioned within second housing, for receiving the laser of the Laser output mouth outgoing from the first shell and launching Stimulated Light.

6. light-emitting device according to claim 5, it is characterised in that Wavelength converter includes wavelength convert sabot and the driving device driving this wavelength convert rotating disk to rotate; Wavelength convert rotating disk includes fin, for producing centrifugal air-flow when wavelength convert rotating disk rotates.

7. light-emitting device according to claim 6, it is characterised in that at least part of inwall of the second housing flowed through at described air-flow, including the shape risen and fallen or fin to increase its surface area.

8. the light-emitting device according to claim 6 or 7, it is characterised in that in the region that described air-flow flows through, also include porous material.

9. light-emitting device according to claim 1, it is characterised in that described first shell and second housing are one-body molded.

10. a projection display equipment, it is characterised in that include light-emitting device according to any one of claim 1 to 9 as light source.