CN104879713A - Wavelength converter and light-emitting device - Google Patents
Wavelength converter and light-emitting device Download PDFInfo
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- CN104879713A CN104879713A CN201410075899.3A CN201410075899A CN104879713A CN 104879713 A CN104879713 A CN 104879713A CN 201410075899 A CN201410075899 A CN 201410075899A CN 104879713 A CN104879713 A CN 104879713A
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- wavelength conversion
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- conversion body
- reflection unit
- emitting device
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/02—Combinations of only two kinds of elements
- F21V13/08—Combinations of only two kinds of elements the elements being filters or photoluminescent elements and reflectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/40—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity
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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
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Multimedia (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
An embodiment of the invention discloses a wavelength converter and a light-emitting device. The wavelength converter comprises a wavelength conversion member, a reflector and a radiator; the wavelength conversion member comprises wavelength conversion material used for absorbing exciting light to generate excited light; the wavelength conversion member is rod shaped; the surface of the wavelength conversion member includes first and second bottom faces, located at two ends, and a lateral face outside the first and second bottom faces; the reflector at least contacts the lateral face of the wavelength conversion member; the radiator contacts at least part of one side, opposite to the lateral face of the wavelength conversion member, of the reflector. The wavelength converter allows quick heat dissipation for the wavelength conversion material.
Description
Technical field
The present invention relates to illumination and Display Technique field, particularly relate to a kind of Wavelength converter and light-emitting device.
Background technology
In the light-emitting device of illuminator of the prior art or optical projection system, the normal exciting light that adopts excites to produce Stimulated Light to the material for transformation of wave length in wavelength conversion layer.But because the wavelength conversion efficiency of each material for transformation of wave length particle in the process be stimulated can not be 100%, wherein lost energy is all converted into heat, this just causes the quick rising of the Cumulate Sum temperature of the heat of material for transformation of wave length particle, directly affects luminous efficiency and the service life of material for transformation of wave length.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of Wavelength converter and the light-emitting device that can realize the quick heat radiating of material for transformation of wave length.
The embodiment of the present invention provides a kind of Wavelength converter, comprising:
Wavelength conversion body, comprise material for transformation of wave length, for absorbing exciting light to produce Stimulated Light, and described wavelength conversion body is bar-shaped, the surface of described wavelength conversion body comprises the first bottom surface and the second bottom surface that are positioned at two ends, and the side except the first bottom surface and the second bottom surface;
The reflection unit at least contacted with the side of described wavelength conversion body;
Heat abstractor, with the contacting at least partly of one side of the described reflection unit side of described wavelength conversion body dorsad.
The embodiment of the present invention also provides a kind of light-emitting device, comprising:
First light source, for generation of the first exciting light;
Above-mentioned Wavelength converter, and the hot spot that described first exciting light is formed in described wavelength conversion body is positioned at the second bottom surface of described wavelength conversion body.
The embodiment of the present invention also provides a kind of Wavelength converter, comprising:
Wavelength conversion body, comprise material for transformation of wave length, for absorbing exciting light to produce Stimulated Light, and described wavelength conversion body in the form of sheets, the surface of described wavelength conversion body comprises relative first surface and second surface, and the side except first surface and second surface;
The reflection unit at least contacted with first surface and the second surface of described wavelength conversion body;
Heat abstractor, with described reflection unit the contacting at least partly of the first surface of described wavelength conversion body or the one side of second surface dorsad.
Compared with prior art, the present invention includes following beneficial effect:
In the present invention, because material for transformation of wave length is elongated bar-shaped distribution in reflection unit, the contact area of material for transformation of wave length and reflection unit is enough large, making material for transformation of wave length absorb exciting light can be delivered on reflection unit to produce the heat produced in the process of Stimulated Light fast, simultaneously the side of reflection unit wavelength conversion body is dorsad provided with heat abstractor, the heat be conducive on emitter can be delivered in air fast, finally realizes the quick heat radiating of material for transformation of wave length.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of an embodiment of light-emitting device of the present invention;
Fig. 2 is the schematic diagram of another embodiment of light-emitting device of the present invention.
Detailed description of the invention
Below in conjunction with drawings and embodiments, the embodiment of the present invention is described in detail.
Embodiment one
Refer to Fig. 1, Fig. 1 is the schematic diagram of an embodiment of light-emitting device of the present invention.As shown in Figure 1, light-emitting device 100 comprises the first light source 110, wavelength conversion body 120, reflection unit 130 and heat abstractor 140.
Wavelength conversion body 120 comprises material for transformation of wave length, for absorbing exciting light to produce Stimulated Light.The most frequently used material for transformation of wave length is fluorescent material, such as yttrium-aluminium-garnet (YAG) fluorescent material, and it can absorb ultraviolet or blue light and be excited to produce yellow Stimulated Light.Material for transformation of wave length may be also the material that quantum dot, fluorescent dye etc. have wavelength conversion capability, is not limited to fluorescent material.Under many circumstances, material for transformation of wave length is Powdered or granular often, is difficult to directly form wavelength conversion body, now just needs to use a kind of bonding agent that each material for transformation of wave length particle is fixed together, and forms specific shape.The most frequently used is silica gel bonding agent, its stable chemical nature, has higher mechanical strength.But silica gel bonding agent can tolerable temperature lower, generally at 300 degrees Celsius to 500 degrees Celsius.In order to be applied in powerful light-emitting device, preferably, can with inorganic adhesive by bonding for material for transformation of wave length one-tenth entirety, such as waterglass or glass dust, to realize resistant to elevated temperatures Wavelength converter.Such as fluorescent material and glass dust (if temperature requirement is low, can use cryogenic glass powder) are melted under certain inert atmosphere protection and mix reshaping.
In the present embodiment, wavelength conversion body 120 is in bar-shaped.The surface of wavelength conversion body 120 comprises the first bottom surface 121 and the second bottom surface 122 being positioned at two ends, and the side except the first bottom surface 121 and the second bottom surface 122, wherein this side can be a curved surface, or also can be formed in succession by multiple plane, the shape area of the first bottom surface 121 and the second bottom surface 122 can be the same or different, and this is not restricted.Concrete example, wavelength conversion body 120 can in rectangular-shaped, then two bottom surfaces that this cuboid area is minimum are respectively the first bottom surface 121 and the second bottom surface 122 of wavelength conversion body 120, this cuboid four sides be the side of wavelength conversion body 120.
In the present embodiment, reflection unit 130 is specially speculum, and around wavelength conversion body 120, contacts with the side of wavelength conversion body 120, and the first bottom surface 121 of wavelength conversion body 120 does not contact with reflection unit 130 with the second bottom surface 122; The i.e. tubular of reflection unit 130 in hollow, and wavelength conversion body 120 is positioned at the inner side of reflection unit 130, is affixed with the inner surface of reflection unit 130.Certainly, in practice, reflection unit 130 also can have other implementations, and this is not restricted.
The contacting at least partly, to dispel the heat to the wavelength conversion body 120 inside reflection unit 130 and reflection unit 130 of one side of heat abstractor 140 and reflection unit 130 side of wavelength conversion body 120 dorsad.
First light source 110 is for generation of the first exciting light.In the present embodiment, the first light source 110 is blue-light source, and the first exciting light is blue light.First light source 110 is preferably LASER Light Source, also can be LED or other solid state light emitters.Certainly, in practice, the first light source 110 also can be the light source of other colors, and this is not restricted.
The first exciting light from the first light source 110 is incident on the second bottom surface 122 of wavelength conversion body 120, and formation excites hot spot on the second bottom surface 122.Material for transformation of wave length in wavelength conversion body 120 absorbs this first exciting light and produces Stimulated Light.In actual conditions, when the first exciting light is incident on the second bottom surface 122, the material for transformation of wave length of being excited at first can absorb a part of exciting light and produce Stimulated Light, unabsorbed first exciting light can penetrate the material for transformation of wave length of being first excited, and be positioned at the material for transformation of wave length of more depths absorb.In some applications, such as material for transformation of wave length is fluorescent powder grain, can be scattered while unabsorbed first exciting light penetrates material for transformation of wave length, so be positioned at the material for transformation of wave length of more depths absorb.
Side surrounding due to wavelength conversion body 120 has reflection unit 130, and the Stimulated Light that material for transformation of wave length produces after absorbing exciting light is isotropism outgoing, this Stimulated Light, under the multiple reflections of this reflection unit 130, is finally divided into two parts respectively from the first bottom surface 121 and the second bottom surface 122 outgoing.
In the embodiment of the present invention, because material for transformation of wave length is elongated bar-shaped distribution in reflection unit, the contact area of material for transformation of wave length and reflection unit is enough large, making material for transformation of wave length absorb exciting light can be delivered on reflection unit to produce the heat produced in the process of Stimulated Light fast, simultaneously the side of reflection unit wavelength conversion body is dorsad provided with heat abstractor, the heat be conducive on emitter can be delivered in air fast, finally realizes the quick heat radiating of material for transformation of wave length.And, because the first bottom surface of wavelength conversion body and the second bottom surface are the exiting surface of Stimulated Light, so by lengthen wavelength conversion body length with increase material for transformation of wave length and raising exciting light optical power density strengthen Stimulated Light time, because exiting surface remains unchanged, and then make the optical extend of Stimulated Light constant, and brightness improves.
In the present embodiment, because the first bottom surface of wavelength conversion body and the second bottom surface are the exiting surface of Stimulated Light, so can carry out shaping by the shape arranging the first bottom surface and the second bottom surface to the emergent light spot of Stimulated Light.Preferably, the opening of the first bottom surface and/or the second bottom surface is rectangle, and wherein this rectangular long limit is 1 to 1,4 to 3 or 16 to 9 with the ratio of broadside.In projection is used, the rectangle of image generally in 4:3 or 16:9 of light valve and projection.Because the facula area of Stimulated Light and shape equal area and the shape of the first bottom surface and/or the second bottom surface opening respectively, therefore by the form fit of the image of the shape and light valve and projection that control the first bottom surface and/or the second bottom surface opening.Or the opening of the first bottom surface and/or the second bottom surface is preferably rounded.Such as in the application of stage lighting, often require circular light spot.Obtain although circular light spot can carry out shaping by the apparatus for shaping of Wavelength converter emitting light path rear end, dodging device often square shaped or rectangular light spots effect is better, and the efficiency obtaining the apparatus for shaping of circular light spot is often lower.Such as, the light mixing effect of circular integrating rod is not good, needs to grow very much and light could be mixed, but now efficiency is just lower.The fly's-eye lens with circular cell can not fill up whole plane to the array combination then due to circular cell lens, and namely leave space between circular cell lens, this causes the loss of gap light and efficiency is lower.Adopting the present invention then can directly obtain uniform circular light spot, is the preferred option being applied to stage lighting application.
Preferably, the length of reflection unit is greater than the length of wavelength conversion body, and namely the first bottom surface of wavelength conversion body and/or the second bottom surface are positioned at the inside of reflection unit, instead of and one end of reflection unit maintain an equal level.Like this, the part that wavelength conversion body is longer than by reflection unit can serve as dodging device, to carry out even light to the Stimulated Light of the exciting light and/or outgoing that are incident in Wavelength converter.
Preferably, the area of the first bottom surface or the second bottom surface is less than 1 square millimeter.Like this, all distance heat abstractor is enough near at arbitrary position of wavelength conversion body, reduces the thermal resistance of wavelength conversion body to heat abstractor, promotes wavelength conversion body heat radiation.In addition, the lighting area of Stimulated Light is enough little, and then makes optical extend enough little.
Preferably, the area of the side of wavelength conversion body 120 is greater than 70% of the surface area of this wavelength conversion body 120.Like this, while the cumulative volume of wavelength conversion body 120 remains unchanged, allow the area of the first bottom surface 121 of wavelength conversion body 120 and the second bottom surface 122 as far as possible little, and then reduce the lighting area of Stimulated Light, to reduce the optical extend of Stimulated Light, improve the brightness of Stimulated Light.
Preferably, along the trend of wavelength conversion body 120, from the first bottom surface, bottom surface 121 to the second 122 of this wavelength conversion body 120, the density of described material for transformation of wave length reduces gradually.Because the first exciting light is incident to the second bottom surface 122 from the second side, bottom surface 122 of wavelength conversion body 120, the density arranging wavelength conversion body 120 medium wavelength transition material increases progressively gradually from the second bottom surface, bottom surface 122 to the first 121, can ensure and manyly can absorb exciting light compared with the material for transformation of wave length away from the second bottom surface 122, and then ensure that the heat that wavelength conversion body produces is more even at wavelength convert distribution in vivo, be more conducive to the heat radiation of wavelength conversion body.
In actual applications, heat abstractor 140 can have various ways, and in the present embodiment, heat abstractor 140 is specially radiating fin.Radiating fin 140 can be fixedly connected on the outer surface of reflection unit 130, and connected mode can adopt welding, bonding or alternate manner.Radiating fin be radiating surface with the face of reflection unit 130 exterior surface, because radiating fin adopts the metal material processing of high heat conduction to form, thus the heat conducted by radiating surface can diffuse to other surface of radiating fin in the inner conduction fast of radiating fin, and by the contact of these surfaces and gas calorie spread to the external world.By designing shape and the size of radiating fin 140, radiating fin can be made to pass through to reduce the temperature of reflection unit 130 outer surface, and then the temperature of the wavelength conversion body 120 of reduction reflection unit 130 inside.
Heat abstractor 140 also can adopt other various ways, such as refrigerator, such as thermoelectric cooling unit.Thermoelectric cooling unit is the pyroelectric effect utilizing solid, and by being added in electrical potential difference between positive and negative two electrodes at chill surface with heat the refrigerating plant producing certain temperature difference between face, wherein the temperature of chill surface is lower than the temperature heating face.If use thermoelectric cooling unit to realize heat abstractor of the present invention, then the chill surface of thermoelectric cooling unit connects with the outer surface of reflection unit 130.Like this, the temperature of reflection unit 130 is lower, is more conducive to the heat radiation of the wavelength conversion body 120 in reflection unit 130.
In the present embodiment, the effect due to heat abstractor 140 is the temperature for reducing the wavelength conversion body 120 in reflection unit 130, and therefore, in practice, heat abstractor 140 and reflection unit 130 also can be combined into same device.Concrete example, surface there is the aluminium of high reflectance or pottery higher due to thermal conductivity, the heat abstractor in the Wavelength converter in the present invention and reflection unit can be served as simultaneously.In practice, aluminium or pottery are provided with the groove that a degree of depth is comparatively greater than opening size, the surface of this groove has high reflectance, and wavelength conversion body is filled in this groove, the face that the surface of wherein wavelength conversion body parallels with the opening of this groove is the second bottom surface of this wavelength conversion body.
Or also can be provided with at aluminium or ceramic surface the groove that a length is comparatively greater than the degree of depth, the surface of this groove has high reflectance, and this groove one end is along its length opening.Wavelength conversion body is filled in groove, and the face that the surface of wherein wavelength conversion body parallels with the opening of this groove one end is along its length the second bottom surface of this wavelength conversion body; Meanwhile, this groove is also stamped a reflecting layer, with make the side of wavelength conversion body surround by reflecting layer.Preferably, the side of this reflecting layer this groove dorsad is also provided with heat abstractor.
At some, radiating effect is required it is not very high occasion, this scheme can be adopted.Owing to saving heat abstractor 140 and reflection unit 130 is combined into same device, the cost of the program is lower, and small volume.
For convenience of the collection of Stimulated Light, preferably, in the present embodiment, the first surface 121 of wavelength conversion body 120 is also provided with reflecting layer, for being reflected into the light beam be incident upon on it.Like this, the Stimulated Light that produces of wavelength conversion body 120 and unabsorbed Stimulated Light (if yes) are all from second surface 122 outgoing of wavelength conversion body 120.Meanwhile, second surface 122 side of wavelength conversion body 120 is provided with light splitting optical filter, for distinguishing the light path of the first exciting light and Stimulated Light.
Or, also can be wavelength conversion body 120 first surface 121 on do not establish reflecting layer, but on second surface 122, be provided with transmission first exciting light and reflect the optical filter of Stimulated Light, making all Stimulated Light all from first surface 121 outgoing.
Preferably, light-emitting device can also comprise secondary light source.As shown in Figure 2, Fig. 2 is the schematic diagram of another embodiment of light-emitting device of the present invention.Light-emitting device 200 comprises the first light source 210, wavelength conversion body 220, reflection unit 230 and heat abstractor 240.
With embodiment illustrated in fig. 1 unlike, in the embodiment depicted in figure 2, light-emitting device 200 also comprises secondary light source 250.
Secondary light source 250 is for generation of the second exciting light, and the hot spot that the second exciting light is formed in wavelength conversion body 220 is positioned at the first bottom surface 221 of wavelength conversion body 220.Secondary light source 250 can adopt the light source the same with the first light source 210, or also can adopt different light sources; And the first light source 210 color produced respectively with secondary light source 250 can be the same, also can be different.Concrete example, the first light source 210 is for generation of blue light, and secondary light source 250 is for generation of ultraviolet light.Wavelength conversion body 220 absorbs the second exciting light and produces Stimulated Light.
In the present embodiment, the exciting light produced by two light sources is excited from two of wavelength conversion body bottom surfaces this wavelength conversion body respectively, improves the utilization rate of the material for transformation of wave length in wavelength conversion body, and then improves the luminous flux of Stimulated Light.
In practice, this secondary light source 250 may not be the second exciting light produced for excitation wavelength conversion body, but produces the first light, and wherein the wave-length coverage of the first light is different with the wave-length coverage of Stimulated Light, and this wavelength conversion body does not absorb this first light.The light of wavelength conversion body outgoing is the mixed light of the first light and Stimulated Light, or the mixed light of the first light, Stimulated Light and the first exciting light.Concrete example, secondary light source 250 is for generation of ruddiness, and the first light source 210 is for generation of blue light, and the material for transformation of wave length in wavelength conversion body 220 is yellow fluorescent powder, for absorbing blue light to produce gold-tinted.Like this, the light of the outgoing that wavelength conversion body is final is the mixed light of gold-tinted and ruddiness, or the mixed light of gold-tinted, ruddiness and blue light (i.e. white light).
Preferably, in the present embodiment, the first bottom surface 221 of wavelength conversion body 220 is provided with optical filter, reflects Stimulated Light for transmission from the light of secondary light source, to make all light all from the second bottom surface 222 side outgoing of wavelength conversion body 220, and then be beneficial to the collection of light beam.
In this description, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
The foregoing is only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize description 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 Wavelength converter, is characterized in that, comprising:
Wavelength conversion body, comprise material for transformation of wave length, for absorbing exciting light to produce Stimulated Light, and described wavelength conversion body is bar-shaped, the surface of described wavelength conversion body comprises the first bottom surface and the second bottom surface that are positioned at two ends, and the side except the first bottom surface and the second bottom surface;
The reflection unit at least contacted with the side of described wavelength conversion body;
Heat abstractor, with the contacting at least partly of one side of the described reflection unit side of described wavelength conversion body dorsad.
2. Wavelength converter according to claim 1, is characterized in that, the area of the side of described wavelength conversion body is greater than 70% of the surface area of described wavelength conversion body.
3. Wavelength converter according to claim 1, is characterized in that, along the trend of described wavelength conversion body, from the first bottom surface of described wavelength conversion body to the second bottom surface, the density of described material for transformation of wave length reduces gradually.
4. the Wavelength converter according to any one of claims 1 to 3, is characterized in that, described reflection unit and described heat abstractor are same device.
5. the Wavelength converter according to any one of claims 1 to 3, is characterized in that, the area of described first bottom surface or the second bottom surface is less than 1 square millimeter.
6. the Wavelength converter according to any one of claims 1 to 3, is characterized in that, along the trend of described wavelength conversion body, the length of described reflection unit is greater than the length of described wavelength conversion body.
7. a light-emitting device, is characterized in that, comprising:
First light source, for generation of the first exciting light;
Wavelength converter according to any one of Claims 1-4, and the hot spot that described first exciting light is formed in described wavelength conversion body is positioned at the second bottom surface of described wavelength conversion body.
8. light-emitting device according to claim 7, is characterized in that, described light-emitting device also comprises secondary light source;
Described secondary light source is for generation of the second exciting light, and the hot spot that described second exciting light is formed in described wavelength conversion body is positioned at the first bottom surface of described wavelength conversion body, and described wavelength conversion body absorbs described second exciting light and produces Stimulated Light; Or,
Described secondary light source is for generation of the first light, wherein the wave-length coverage of the first light is different from the wave-length coverage of described Stimulated Light, the hot spot that described first light is formed in described wavelength conversion body is positioned at the first bottom surface of described wavelength conversion body, and described wavelength conversion body does not absorb described first light.
9. light-emitting device according to claim 8, is characterized in that, the first bottom surface of described wavelength conversion body is provided with optical filter, reflects described Stimulated Light for transmission from the light of secondary light source.
10. light-emitting device according to claim 7, is characterized in that, described second bottom surface and/or described first bottom surface are rectangle, and this rectangular long limit is 1 to 1,4 to 3 or 16 to 9 with the ratio of broadside; Or described second bottom surface and/or described first bottom surface rounded.
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| CN201410075899.3A CN104879713A (en) | 2014-03-02 | 2014-03-02 | Wavelength converter and light-emitting device |
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| CN201410075899.3A CN104879713A (en) | 2014-03-02 | 2014-03-02 | Wavelength converter and light-emitting device |
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| WO2019010961A1 (en) * | 2017-07-14 | 2019-01-17 | 深圳市光峰光电技术有限公司 | Light source system and projection equipment |
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| JP2021156997A (en) * | 2020-03-26 | 2021-10-07 | セイコーエプソン株式会社 | projector |
| CN114325891A (en) * | 2021-12-30 | 2022-04-12 | 拓荆科技股份有限公司 | Reflection module, optical lighting device and optical modification equipment |
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| CN111427227A (en) * | 2019-01-10 | 2020-07-17 | 精工爱普生株式会社 | Light source device, projector, and phosphor rod |
| JP2021156997A (en) * | 2020-03-26 | 2021-10-07 | セイコーエプソン株式会社 | projector |
| CN114325891A (en) * | 2021-12-30 | 2022-04-12 | 拓荆科技股份有限公司 | Reflection module, optical lighting device and optical modification equipment |
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