CN116293593A - Fluorescent conversion white laser light source device - Google Patents
Fluorescent conversion white laser light source device Download PDFInfo
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- CN116293593A CN116293593A CN202310297193.0A CN202310297193A CN116293593A CN 116293593 A CN116293593 A CN 116293593A CN 202310297193 A CN202310297193 A CN 202310297193A CN 116293593 A CN116293593 A CN 116293593A
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
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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
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
-
- 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
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
- F21V29/503—Cooling arrangements characterised by the adaptation for cooling of specific components of light sources
-
- 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
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
- F21V5/048—Refractors for light sources of lens shape the lens being a simple lens adapted to cooperate with a point-like source for emitting mainly in one direction and having an axis coincident with the main light transmission direction, e.g. convergent or divergent lenses, plano-concave or plano-convex lenses
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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
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
- F21V7/06—Optical design with parabolic curvature
-
- 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
- F21V9/08—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing coloured light, e.g. monochromatic; for reducing intensity of light
-
- 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
- F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/30—Semiconductor lasers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Microelectronics & Electronic Packaging (AREA)
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- Semiconductor Lasers (AREA)
Abstract
The invention discloses a fluorescence conversion white laser light source device, which belongs to the field of illumination light sources and comprises: the device comprises a light emitting unit, a reflecting unit, a filtering unit, a wavelength conversion unit, a heat radiating unit and an optical guiding unit; the filtering unit is positioned at the opening of the reflecting unit; the wavelength conversion unit and the heat dissipation unit are integrated with the optical guiding unit and are arranged in the reflecting unit; the laser emitted by the light-emitting unit enters through the hole of the reflecting unit, the excitation wavelength conversion unit forms white light, the heat dissipation unit is also used for reflecting the white light to the reflecting unit, and the white light is emitted from the optical guiding unit after being reflected by the reflecting unit. The invention regulates and controls the white light path through the reflecting unit and the optical guiding unit, and radiates the wavelength conversion material by the radiating unit and the optical guiding unit, thereby avoiding the problem of luminescence saturation, improving the conversion efficiency and the thermal stability of the fluorescent material, and leading the white laser light source to have the advantages of high power, high brightness, good radiation and good condensation.
Description
Technical Field
The invention belongs to the field of illumination light sources, and particularly relates to a fluorescence conversion white laser light source device.
Background
Under the current global energy shortage background, the semiconductor solid-state lighting has the advantages of high light efficiency, low energy consumption, long service life, environmental friendliness and the like, and leads the continuous improvement of the national energy-saving and environmental-protection capabilities. With the increasing demand for high-brightness illumination devices, semiconductor illumination technology is evolving toward high current, high power density, light weight, and small size, and laser illumination as a new generation illumination technology has arisen. Compared with the prior LED technology, the laser illumination technology not only avoids the problem of efficiency dip, but also has the characteristics of super high power, super high brightness, high collimation, long irradiation distance and the like, and can be applied to the fields of automobile headlamps, projection display, medical equipment, visible light communication and the like, and has huge market potential.
Patent CN209524343U discloses a white laser packaging structure, which adopts blue laser to excite a yellow fluorescent material to obtain yellow light, and the yellow light and the blue laser are mixed to obtain white laser, so that red, green and blue three primary color lasers are not needed to synthesize white light, and the material and the production and processing cost are greatly reduced. However, the scheme does not consider the heat dissipation of the fluorescent material and the divergence of the white laser, and the fluorescent material is subjected to high laser radiation energy and fluorescence conversion heat due to the high optical power density and small radiation light spot of the blue laser, so that the temperature of the fluorescent material is increased due to the accumulation of the heat, thereby triggering the thermal quenching effect of the fluorescent material and influencing the luminous efficiency and the stability of the fluorescent material; in addition, white laser is directly emitted after being reflected, and the brightness and the collimation degree of the white laser are also affected without light path control.
Patent CN112578620a discloses a laser light source device, which focuses and shapes white laser through a collimation light path and a focusing light path and then emits the white laser, so that the aperture angle, the spot size or the post working distance of the emitted white laser beam can be controlled, the application range of the white laser is further expanded, and the white laser with high power and high brightness can be obtained. However, this solution does not take into account the packaging properties of the device, the structure is dispersed, increasing the volume of the whole device.
Disclosure of Invention
Aiming at the defects and improvement requirements of the prior art, the invention provides the fluorescent conversion white laser light source device, which is used for radiating the fluorescent material by arranging the radiating unit, so that the thermal quenching effect of the fluorescent material is avoided, and the radiating problem of the fluorescent conversion material is solved.
In order to achieve the above object, the present invention provides a fluorescence conversion white laser light source device, comprising: the device comprises a light emitting unit, a reflecting unit, a filtering unit, a wavelength conversion unit, a heat radiating unit and an optical guiding unit;
wherein the light emitting unit is positioned outside the reflecting unit; the reflecting unit is provided with a small hole, and the filtering unit is positioned at the small hole of the reflecting unit; the wavelength conversion unit and the heat dissipation unit are integrated with the optical guiding unit and are arranged in the reflecting unit;
the laser emitted by the light-emitting unit enters through the small hole of the reflecting unit to excite the wavelength conversion unit to form white light, the heat dissipation unit is also used for reflecting the white light to the reflecting unit, and the white light is emitted from the optical guiding unit after being reflected by the reflecting unit.
Further, the optical guiding unit is a sapphire lens.
Further, the wavelength conversion unit is a fluorescent glass, a fluorescent ceramic or a fluorescent single crystal containing a yellow phosphor.
Further, the filtering unit is a blue light filtering plate, the light emitting unit is a blue light laser, the laser emitted by the light emitting unit is blue light, the blue light excites the wavelength conversion unit to generate yellow light, and the yellow light and the blue light are mixed to form white light.
Further, the heat dissipation unit has a reflectivity of greater than 85%.
Further, the heat dissipation unit is made of ceramic material, and the heat conductivity coefficient of the heat dissipation unit is not lower than 20W.m < -1 >. K < -1 >.
Further, the heat dissipation unit is made of metal material, and the heat conductivity coefficient of the heat dissipation unit is not lower than 200 W.m -1 ·K -1 。
Further, the reflecting unit is a parabolic reflecting cup, and the small hole is positioned at the top of the parabolic reflecting cup.
Further, the surface of the parabolic reflecting cup is a mirror radiating unit, the reflectivity is larger than 90%, laser emitted by the light emitting unit is a collimated laser beam, the collimated laser beam enters through the small hole to excite the wavelength converting unit to form white light, the white light is reflected to the reflecting unit through the radiating unit, and then the white light is reflected by the paraboloid to form collimated white light.
Further, the wavelength conversion unit is located at the focus of the paraboloid of the reflection unit, and the excitation mode is reflection type.
In general, through the technical scheme of the invention, the following beneficial effects can be obtained:
1. the wavelength conversion unit is subjected to heat radiation through the heat radiation unit, so that the occurrence of a thermal quenching phenomenon is avoided, the luminescence performance of the fluorescent conversion material under high-power laser excitation is improved, and the reliability of the laser light source is improved;
2. the white light is focused through the optical guide unit, so that the problem of luminescence saturation is avoided, and the white light emitted by the optical guide unit has the characteristics of high power, high brightness, good condensation and the like;
3. the wavelength conversion unit, the heat dissipation unit and the optical guide unit are integrated into a whole and are arranged in the reflection unit, so that the packaging requirement of the high-power laser light source device is met, and the volume of the whole device is reduced;
4. the sapphire lens is selected to further radiate the wavelength conversion unit, so that the heat dissipation of the fluorescent conversion material is increased, and the conversion efficiency and the thermal stability of the fluorescent conversion material are further improved;
5. the blue light filter is arranged to only allow blue light to pass through, so that loss caused by direct emission of yellow light from the small hole is reduced;
6. the radiating unit with high reflectivity is selected to reflect unmixed incident blue light and yellow light emitted by the wavelength conversion unit so as to further form white light, the blue light and the yellow light are prevented from being directly emitted, the full utilization of the light source is realized, and the monochromaticity of the white laser light source is ensured.
Drawings
FIG. 1 is a schematic diagram showing a preferred structure of a fluorescence conversion white laser light source device of the present invention;
fig. 2 is a schematic diagram of a partial structure of a fluorescence conversion white laser light source device according to embodiment 1 of the present invention;
fig. 3 is a schematic diagram of a partial structure of a fluorescence conversion white laser light source device according to embodiment 2 of the present invention;
the same reference numbers are used throughout the drawings to reference like elements or structures, wherein:
1-light emitting unit, 2-reflecting unit, 3-filtering unit, 4-wavelength converting unit, 5-heat dissipating unit, 6-optical guiding unit, 401-wavelength converting unit, 501-heat dissipating unit, 402-wavelength converting unit, 502-heat dissipating unit.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Fig. 1 is a schematic diagram of a preferred structure of a fluorescence conversion white laser light source device according to an embodiment of the present invention. Referring to fig. 1, the fluorescent conversion white laser light source device of the present invention will be described in detail with reference to fig. 2 to 3.
The fluorescence conversion white laser light source device includes a light emitting unit 1, a reflecting unit 2, a filtering unit 3, a wavelength converting unit 4, a heat radiating unit 5, and an optical guiding unit 6. Wherein the light emitting unit 1 is positioned outside the reflecting unit 2; the reflecting unit 2 is provided with a small hole, and the filtering unit 3 is positioned at the small hole of the reflecting unit 2; the wavelength conversion unit 4 and the heat dissipation unit 5 are integrated with the optical guiding unit 6 and are placed in the reflection unit 2; the laser emitted by the light emitting unit 1 enters through the small hole of the reflecting unit 2, excites the wavelength converting unit 4 to generate white light, and the heat radiating unit 5 is also used for reflecting the white light to the reflecting unit 2, and then is emitted from the optical guiding unit 6 after being reflected by the reflecting unit 2.
According to the invention, the heat dissipation unit is used for dissipating heat of the wavelength conversion unit, so that the heat dissipation of the fluorescent conversion material is increased, the occurrence of a thermal quenching phenomenon is avoided, the luminescence performance of the fluorescent conversion material under high-power laser excitation is further improved, and the reliability of the laser light source is improved; the optical guide unit is arranged inside the reflection unit, so that the packaging requirement of the high-power laser light source is met, and the volume of the whole device is reduced.
Preferably, in the fluorescence conversion white laser light source device, the reflecting unit 2 is a parabolic reflecting cup, the surface is a mirror surface radiating unit, the reflectivity is more than 90%, and the top of the reflecting unit is provided with a small hole so as to facilitate the entering of collimated laser beams. The wavelength conversion unit 4 is positioned at the focus of the paraboloid of the reflecting unit 2, and is made of fluorescent glass, fluorescent ceramic or fluorescent monocrystal containing yellow fluorescent body. The light emitting unit 1 is a blue laser for exciting a yellow phosphor in the wavelength converting unit 4 to convert to yellow light, which is mixed with blue light to form white light. The filtering unit 3 is a blue light filter, and is located on the top opening of the reflecting unit 2, and only allows blue light to pass through, so as to prevent yellow light emitted by the wavelength conversion unit 4 from overflowing from the small hole. The heat dissipation unit 5 is made of ceramic material or metal material, and has a reflectivity greater than 85%, and is further configured to reflect unmixed incident blue light and yellow light emitted by the wavelength conversion unit 4 to further form white light, so as to avoid direct emission of blue light and yellow light, realize full utilization of the light source, and ensure monochromaticity of the white laser light source. White light generated by the wavelength conversion unit 4 is reflected by the heat dissipation unit 5 and then reaches the reflection unit 2, and collimated white light is formed after parabolic reflection. The optical guiding unit 6 is made of a sapphire lens, focuses the white light collimated by the paraboloid, and further dissipates heat of the wavelength conversion unit 4.
In the first embodiment of the invention, the light emitting unit 1 is a blue laser, and the emission wavelength is 445nm; the reflecting unit 2 is a parabolic reflecting cup, the top of the reflecting unit is provided with a small hole, the inner surface of the reflecting unit is a mirror surface radiating unit, the reflecting unit is made of silver film, and the heat conductivity coefficient is 400 W.m -1 ·K -1 The reflectivity is 95%; the optical guide unit 6 is a sapphire lens, the transmittance is 95%, and the thermal conductivity is 30 W.m -1 ·K -1 The method comprises the steps of carrying out a first treatment on the surface of the The wavelength conversion unit 401 is made of a material containing YAG: ce (Ce) 3+ (Y 3 Al 5 O 12 ：Ce 3+ ) Fluorescent ceramics of yellow fluorescent powder; the heat dissipation unit 501 is also made of a silver film, a silver layer is prepared on the sapphire lens, fluorescent ceramic slurry containing yellow fluorescent powder is coated on the silver layer by adopting a screen printing process, and a metal substrate-fluorescent ceramic film is formed by low-temperature sintering, so that the integrated preparation of the heat dissipation unit 501 and the wavelength conversion unit 401 is realized, the process is simple, and the heat dissipation performance is strong. In some alternative embodiments, the heat dissipation unit 501 may also be made of other metal materials with reflectivity greater than 85% and thermal conductivity not less than 200 W.m-1.K-1, such as aluminum film, copper mold, etc.
In the second embodiment of the present invention, the light emitting unit 1 is a blue laser, and the emission wavelength is 450nm; the reflecting unit 2 is a parabolic reflecting cup, the top of the reflecting unit is provided with a small hole, the inner surface of the reflecting unit is a mirror surface radiating unit, the reflecting unit is made of an aluminum film, and the reflectivity of the reflecting unit is 95%; the optical guide unit 6 is a sapphire lens, the transmittance is 95%, and the thermal conductivity is 30 W.m -1 ·K -1 The method comprises the steps of carrying out a first treatment on the surface of the The wavelength conversion unit 402 is made of a material containing LSN: ce (Ce) 3+ (La 3 Si 6 N 11 ：Ce 3+ ) Fluorescent glass of yellow fluorescent powder, heat dissipation unit 502 is made of alumina ceramic substrate, and the heat conductivity coefficient is 20 W.m -1 ·K -1 The reflectivity is 90%, the fluorescent glass slurry containing yellow fluorescent powder is coated on the ceramic substrate by adopting a screen printing process, and then the ceramic substrate-fluorescent glass film is formed by low-temperature sintering, so that the integrated preparation of the heat dissipation unit 502 and the wavelength conversion unit 402 is realizedThe method has simple process and strong applicability, and is suitable for large-scale production. In some alternative embodiments, the heat dissipation unit 502 may also have other reflectivity greater than 85% and thermal conductivity not less than 20W.m -1 ·K -1 For example, an aluminum nitride ceramic substrate, a silicon nitride ceramic substrate, etc.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. A fluorescence-converted white laser light source device, comprising: a light emitting unit (1), a reflecting unit (2), a filtering unit (3), a wavelength converting unit (4), a heat radiating unit (5) and an optical guiding unit (6);
wherein the light emitting unit (1) is positioned outside the reflecting unit (2); the reflecting unit (2) is provided with a small hole, and the filtering unit (3) is positioned at the small hole of the reflecting unit (2); the wavelength conversion unit (4) and the heat dissipation unit (5) are integrated with the optical guiding unit (6) and are arranged in the reflecting unit (2);
the laser emitted by the light emitting unit (1) enters through the small hole of the reflecting unit (2) to excite the wavelength conversion unit (4) to form white light, the heat radiating unit (5) is also used for reflecting the white light to the reflecting unit (2), and the white light is emitted from the optical guiding unit (6) after being reflected by the reflecting unit (2).
2. A fluorescence converted white laser light source device according to claim 1, characterized in that the optical guiding unit (6) is a sapphire lens.
3. The fluorescence-converted white laser light source device according to claim 2, wherein the wavelength conversion unit (4) is a fluorescent glass, a fluorescent ceramic or a fluorescent single crystal containing a yellow phosphor.
4. A fluorescence conversion white laser light source device according to claim 3, wherein the filter unit (3) is a blue filter, the light emitting unit (1) is a blue laser, the laser light emitted by the blue laser is blue light, and the blue light excites the wavelength conversion unit (4) to generate yellow light, and the yellow light and the blue light are mixed to form white light.
5. The fluorescence conversion white laser light source device according to claim 4, wherein the heat dissipation unit (5) has a reflectance of more than 85%.
6. The fluorescence conversion white laser light source device according to claim 5, wherein the heat dissipating unit (5) is a ceramic material having a thermal conductivity of not less than 20 w.m-1.k-1.
7. The fluorescence conversion white laser light source device according to claim 5, wherein the heat dissipating unit (5) is a metal material having a thermal conductivity of not less than 200 w.m-1.k-1.
8. A fluorescence conversion white laser light source device according to any one of claims 1-7, wherein the reflecting unit (2) is a parabolic reflector cup and the aperture is located at the top of the parabolic reflector cup.
9. The fluorescence conversion white laser light source device according to claim 8, wherein the surface of the parabolic reflector cup is a mirror surface heat radiation unit, the reflectivity is greater than 90%, the laser emitted by the light emitting unit (1) is a collimated laser beam, the collimated laser beam enters from the small hole, the wavelength conversion unit (4) is excited to form white light, the white light is reflected to the reflecting unit (2) through the heat radiation unit (5), and the white light is reflected by the parabolic surface to form collimated white light.
10. The fluorescence conversion white laser light source device according to claim 8, wherein the wavelength conversion unit (4) is located at a focal point of the paraboloid of the reflection unit (2) in such a manner that the excitation is reflective.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310297193.0A CN116293593A (en) | 2023-03-24 | 2023-03-24 | Fluorescent conversion white laser light source device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310297193.0A CN116293593A (en) | 2023-03-24 | 2023-03-24 | Fluorescent conversion white laser light source device |
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| CN116293593A true CN116293593A (en) | 2023-06-23 |
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| CN202310297193.0A Pending CN116293593A (en) | 2023-03-24 | 2023-03-24 | Fluorescent conversion white laser light source device |
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