WO2020019712A1 - 一种照明光源*** - Google Patents

一种照明光源*** Download PDF

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Publication number
WO2020019712A1
WO2020019712A1 PCT/CN2019/076627 CN2019076627W WO2020019712A1 WO 2020019712 A1 WO2020019712 A1 WO 2020019712A1 CN 2019076627 W CN2019076627 W CN 2019076627W WO 2020019712 A1 WO2020019712 A1 WO 2020019712A1
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Prior art keywords
light
light source
convergence point
led
illumination
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PCT/CN2019/076627
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English (en)
French (fr)
Inventor
陈良晓
张权
李屹
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深圳市绎立锐光科技开发有限公司
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Publication of WO2020019712A1 publication Critical patent/WO2020019712A1/zh

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    • 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
    • F21K9/69—Details of refractors forming part of the light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/20—Illuminance distribution within the emitted light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
    • 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
    • F21Y2115/10—Light-emitting diodes [LED]
    • 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

Definitions

  • the invention relates to the field of lighting, and in particular to a lighting source with high central brightness.
  • Vehicle lighting sources are mainly halogen, xenon and LED light sources. Because LED has the advantages of energy saving and environmental protection, long service life, small size, light weight, sturdy structure and low operating voltage, it is more and more widely used in the field of automotive lighting.
  • the maximum luminous flux of a single LED chip does not exceed 300 lumens.
  • Existing automotive headlights generally use LED arrays to achieve a larger lighting range and a larger luminous flux.
  • the illumination light of the LED array after optical distribution by the optical element fails to meet the high center brightness required for automotive headlight lighting.
  • the light source system includes: a first light source including at least two LED light sources; a second light source module, Containing a laser and a collecting lens, the collecting lens is used for collecting and converging the light beam, so that the second light is converged at the first converging point, and the first converging point is located at the intersection of the light emitting surface of the LED light source; and the second light is at the first
  • the divergence angle at a convergence point is smaller than the divergence angle of the first light; the first convergence point is set between at least two LED light sources.
  • the laser light source has high brightness and high energy density, and the divergence angle at the convergence point of the laser light source is smaller than the divergence angle of the LED light source, the center of the light source is relatively high, and the divergence angle of the high-intensity light in the center is small, which can be used at long distances. The position still gets a spot with high central illumination.
  • the distance from the center of the first convergence point to the light emitting surface of the LED light source is less than 0.03 mm, and the illumination light emitted by the illumination light source system can form an ideal automobile headlight illumination light.
  • the center of the light source Brighter.
  • the divergence angle of the second light at the first convergence point is less than 80% of the divergence angle of the first light at the LED light source. The smaller the point's divergence angle is from the first light source, the greater the central brightness of the light source will be.
  • the second light source module further includes a light conversion layer, which is disposed on an optical path between the laser light source and the collection lens, and can absorb laser light and emit third light.
  • Light has a different wavelength or light distribution from the laser.
  • the high-brightness and high-power-density blue laser excites the light conversion layer, a third light with a high energy density can be obtained, so that the lighting source system can meet the demand for high brightness of the lighting light center in different scenes.
  • the illumination light source system further includes a light collection system including a parabolic reflector, a lens, or a combination of an ellipsoidal reflector and a lens, which is disposed between the first light source and the second light source module.
  • a light collection system including a parabolic reflector, a lens, or a combination of an ellipsoidal reflector and a lens, which is disposed between the first light source and the second light source module.
  • One side of the light emitting surface is used to reflect or project light emitted from the first light source module and the second light source module.
  • the front focus of the light collection system is located at the first convergence point, and the second or third light with high central brightness is reflected or projected to the center area of the illumination light, so that the center of the illumination light emitted from the light source system The area is brighter and the area illuminated by the illumination light is larger.
  • the illumination light source system further includes a substrate and a heat sink, the LED light source is disposed on the substrate, and the heat sink is connected to the substrate away from the light-emitting surface side, wherein the substrate and the The heat sink includes a through hole, and the LED light sources are arranged linearly on both sides of the through hole of the substrate or are arranged around the through hole of the substrate.
  • the heat sink processes the LED light source to extend the service life of the lighting source system.
  • the heat sink includes a groove structure, the position of the groove coincides with the position of the through hole on the substrate, the laser light source is disposed at the bottom of the groove, and the heat sink faces the laser.
  • the light source and the LED light source are heat-dissipated to realize the use of the same heat sink to dissipate the two light-heat sources, which is conducive to streamlining the heat dissipation structure and further extending the service life of the lighting source system.
  • Embodiment 1 is a side view of an embodiment of an illumination light source system in Embodiment 1 of the present invention
  • Embodiment 2 is a side view of a modified embodiment of the illumination light source system in Embodiment 1 of the present invention
  • Embodiment 3 is a side view of an embodiment of an illumination light source system in Embodiment 2 of the present invention.
  • Embodiment 4 is a side view of an embodiment of an illumination light source system in Embodiment 3 of the present invention.
  • FIG. 5 is a side view of a modified embodiment of the illumination light source system in Embodiment 3 of the present invention.
  • FIG. 6 is a side view of still another modified embodiment of the illumination light source system in Embodiment 3 of the present invention.
  • FIG. 7 is an effect diagram of the light emitted by the illumination light source system in Embodiment 3 of the present invention.
  • FIG. 8 is an effect diagram of the light emitted by the illumination light source system in Embodiment 3 of the present invention.
  • the first convergence point mentioned in the present invention is all areas within a spherical or spherical-like range with a specific volume, and the illuminance value of each position in the area is greater than 1 / e of the maximum illuminance value in the area.
  • the first convergence point The spot light is radiated forward to form a hot zone of the car headlight illumination light.
  • LED arrays are generally used to achieve a larger lighting range and higher luminous flux. It has the following two problems. On the one hand, due to the small light power density of the LED light source, after the light collection system performs the light distribution processing, the central illuminance of the illumination light cannot meet the standards of the headlights of the car; on the other hand, LEDs are used. The array is used as a light source. Because of its larger light emitting surface, the volume of the light collection system will be larger, and the volume of the vehicle lights will be larger. To solve the above technical problems, the present invention provides the following embodiments.
  • this embodiment provides an illumination light source system including a first light source 110 and a second light source module 120; wherein the first light source includes at least two LED light sources 111 to emit the first light; and the second light source module 120 includes a laser light source 121 and a collecting lens 122.
  • the laser light source 121 emits the second light
  • the collection lens 122 collects and condenses the second light, so that the second light is converged at the first convergence point.
  • the first convergence point intersects the light emitting surface of the LED light source 111; the first convergence point is located between at least two LED light sources 111; the divergence angle of the second light at the first convergence point is smaller than that of the first light on the light emitting surface Divergence angle.
  • the first light and the second light are emitted in the same direction on the plane where the light emitting surface of the LED light source 111 is located, and together constitute the output light of the illumination light source system.
  • the first light source 110 includes at least two LED light sources 111 for emitting a first light.
  • the first light is a Lambertian distribution light, and the light output angle thereof is 180 degrees.
  • the light emitting surface of each LED light source is 1 ⁇ 1 mm 2 .
  • the second light source module 120 includes a laser light source 121 and a collection lens 122.
  • the laser light source 121 is a semiconductor laser for emitting the second light.
  • the brightness and optical power density of the second light are both high.
  • the collecting lens 122 collects and converges the second light, so that the second light converges at the first convergence point.
  • a convergence point intersects the light emitting surface of the LED light source 111. The inventor has found through repeated experiments that when the distance from the center of the first convergence point to the light emitting surface of the LED light source is less than 0.03 mm, the center of the illumination light emitted by the lighting source system Brightness and light distribution have no or little effect, and can form an ideal hot zone for automotive headlight lighting.
  • the size of the first convergence point and / or the divergence angle of the second light at the first convergence point are both adjustable.
  • the curvature of the convex surface of the collection lens 122 or the distance between the collection lens 122 and the laser light source 121 can be changed.
  • the distance changes the size of the first convergence point and / or the divergence angle of the second light at the first convergence point.
  • Adjusting the diameter of the first convergence point and / or the divergence angle at the second light convergence point can change the central light intensity of the output illumination light.
  • the divergence angle of the second light at the first convergence point is smaller than the divergence angle of the first light.
  • the divergence angle of the second light at the first convergence point is at least smaller than the first light at the LED light source. 80% of the divergence angle of the light emitting surface.
  • the inventors obtained through experiments and simulations that when the diameter of the first convergence point is changed within a range of 0.5 mm to 1.0 mm, the luminous flux of the light emitted from the illumination light source and the change in the central illuminance and at the first convergence point
  • the divergence angle of the second light is changed within the range of 60 degrees to 160 degrees, the luminous flux of the light emitted from the illumination light source and the central illuminance change.
  • the smaller the diameter of the first convergence point the greater the central illuminance of the output light of the illumination light source system; the smaller the divergence angle of the second light at the first convergence point, the greater the central illuminance of the illumination light output by the illumination light source system.
  • Table 1 The relationship between the diameter of the second light convergence point, the luminous flux of the illumination light and the central light intensity:
  • Table 2 The relationship between the divergence angle of the second light at the first convergence point and the illumination light flux and central light intensity:
  • the first convergence point is located between at least two LED light sources 111.
  • the LED light sources 111 may be arranged side by side.
  • the first convergence point is located in the middle of the four LED light sources 111. Position; it can also be arranged in a perimeter type, the first convergence point is located at the center of the array of 4 LED light sources 111.
  • the illumination light source system further includes a substrate 160 and a heat sink 170.
  • the substrate 160 and the heat sink 170 are not necessary in the present invention.
  • a single LED lamp bead can be directly packaged on the heat sink 170, and the heat sink 170 is used to dissipate the LED lamp beads.
  • the LED light source 111 is preferably disposed on a substrate 160.
  • the substrate 160 is a copper PCB board, which includes a through hole, and the LED light sources 111 are arranged linearly on both sides of the light through hole or are arranged around the light through hole;
  • the substrate 160 is disposed on the heat sink 170, and the substrate 160 is connected to the heat sink 170 by welding or bonding.
  • the heat sink 170 includes a through hole. The position of the through hole of the heat sink 170 coincides with the position of the through hole of the substrate 160.
  • the heat sink 170 dissipates heat generated by the LED light source 111.
  • the substrate 160 and the heat sink 170 are connected by using a silver tin solder (solder) or a gold-tin solder (solder), and the substrate 160 and the heat sink 170 may also be connected by using a silver paste, such as a solder or a silver paste.
  • a silver paste such as a solder or a silver paste.
  • the thermal conductivity is relatively high, and the heat generated by the LED light source 111 can be conducted from the substrate 160 to the heat sink 170, extending the life of the lighting source system.
  • FIG. 2 shows a modified embodiment of this embodiment.
  • the illumination light source system includes an LED light source 111, a laser light source 121, a collecting lens 122, a substrate 160, and a heat sink 180.
  • the LED light source 111, the laser light source 121, and the collecting lens 122 The substrate 160 is the same as that in the first embodiment, and will not be described in detail here. For details, refer to the related description in the first embodiment.
  • This embodiment differs from Embodiment 1 only in that the heat sink 180 includes a groove structure, and the position of the groove structure of the heat sink 180 coincides with the position of the through hole of the substrate 160.
  • the heat sink 180 can simultaneously support the LED light source 111 and the laser light source. 121 heat dissipation can further extend the life of the lighting source system.
  • the illuminance at the center of the illuminating light output by the illuminating light source system in this implementation is relatively high, which can meet the high-brightness requirement of the headlight center of the car.
  • the illumination light source system includes a first light source 210, a second light source module 220, a substrate 260, and a heat sink 270.
  • the second light source module 220 further includes a light conversion layer 223.
  • the light conversion layer 223 is disposed on the laser light source 221, or may be far away from the laser light source 221 and located on a laser transmission optical path.
  • the light conversion layer 230 may be a transmissive type (that is, the light incident surface and the emission surface are located on both sides of the light conversion layer), a reflective type (that is, the light incident surface and the emission surface are located on the same side of the light conversion layer), or a fluorescent cavity (That is, light can be recycled in the light conversion layer).
  • the light conversion layer 230 includes a substrate and a light conversion center and / or a light scattering center.
  • the substrate may be silica gel, glass, or ceramic.
  • the light conversion center may include a yellow phosphor or a quantum dot, or a green phosphor or a quantum dot and a red phosphor. Or quantum dots; the light scattering center can be titanium oxide particles, silicon oxide particles, alumina particles, etc.
  • the refractive index of the particles is different from that of the substrate.
  • the light conversion layer 230 can absorb laser light and emit third light, and the third light has a different wavelength or light distribution from the laser light. Since both the brightness and the optical power density of the second light emitted from the laser light source 221 are large, the brightness of the third light emitted from the light conversion layer 230 is also large. The second light emitted by the laser light source 221 is converted by the light conversion layer to emit the third light.
  • the peak wavelength or light distribution of the third light is different from the second light, and is collected and condensed by the collection lens 122, so that the third light is condensed on the first A convergence point, and the first convergence point intersects the light emitting surface of the LED light source 211, and the distance from the center of the first convergence point to the light emitting surface of the LED light source 211 is less than 0.03 mm; the first convergence point is located between at least two LED light sources.
  • the size of the first convergence point and / or the divergence angle of the third light at the first convergence point are both adjustable.
  • the divergence angle of the third light at the first convergence point is smaller than the divergence angle of the third light at the convergence point, and further, the divergence angle of the third light at the first convergence point is at least smaller than the first light at 80% of the divergence angle of the light emitting surface of the LED light source.
  • the illuminance at the center of the illuminating light output by the illuminating light source system in this implementation is relatively high, which can meet the high-brightness requirement of the headlight center of the car.
  • the illumination light source system includes a first light source 310, a second light source module 320, and a parabolic reflector 330, wherein the first light source 310 includes at least two LED light sources 311; a second light source module 320 includes a laser light source 321 and a collecting lens 322.
  • the first light source 310 includes at least two LED light sources 311; a second light source module 320 includes a laser light source 321 and a collecting lens 322.
  • the second light emitted by the second light source module 320 is collected and condensed by the collection lens 322, the second light is converged at the first convergence point, the first convergence point intersects with the light emitting surface of the LED light source 311, and the first convergence
  • the distance between the center of the point and the light emitting surface of the LED light source 311 is less than 0.03mm, and the size of the first convergence point and / or the divergence angle of the second light from the first convergence point can be adjusted.
  • the second light is at The divergence angle at the first convergence point is smaller than the divergence angle of the first light.
  • the divergence angle of the second light at the first convergence point is at least less than 80% of the divergence angle of the first light on the light emitting surface of the LED light source.
  • the first convergence point is located between at least two LED light sources 311; further, the first convergence point is located at a focal position of the parabolic light emitting cup 330.
  • the first light and the second light are emitted in the same direction on the plane on which the light emitting surface of the LED light source 311 is located, and after being reflected by the parabolic light cup 330, they are emitted from the light source system to the outside. Referring to FIG.
  • the parabolic reflector 330 reflects the first light and the second light to make it exit from the light source
  • the second light emitted from the second light source module 320 forms the central area A of the illumination light
  • the first light emitted from the first light source 310 forms the illumination
  • the outer peripheral area B of the light, and the illuminance of the central area A is much larger than that of the outer peripheral area B.
  • the laser light source 321 has a higher brightness and a smaller optical expansion amount, its emitted light irradiation distance is farther than that emitted by the LED light source 311.
  • the illuminance of the illumination light center output by the illumination light source system is relatively high, and the illumination light center forms a hot zone with ideal high brightness.
  • FIG. 5 shows a modified embodiment of this embodiment.
  • the illumination light source system includes a first light source 310, a second light source module 320, and a lens 340.
  • the light collection system is a lens 340.
  • the lens 340 includes a curved lens or a Fresnel lens, and may also be replaced with a TIR lens.
  • the first convergence point is located at the focal point of the lens 340.
  • the lens 340 images the first light source and the second light in front of the light emitting surface of the light source.
  • the illumination light source output by the illumination light source system has a high illuminance, and the illumination light center forms an ideal high brightness. Hot zone.
  • FIG. 6 shows another modified embodiment of this embodiment.
  • the illumination light source system includes a first light source 310, a second light source module 320, and a combination of an ellipsoidal reflector 351 and a lens 352.
  • This embodiment and embodiment 3 The only difference is that the light collection system is a combination of an ellipsoidal reflector 351 and a lens 352.
  • the first convergence point is located at the focal point of the ellipsoidal reflector 351.
  • the ellipsoidal reflector 351 reflects and converges the first light and the second light, so that the light beam converges at the focal point of the lens 352, and is imaged by the lens 352 on the light emitting surface.
  • the illuminance of the center of the illuminating light output by the illuminating light source system is high, and the illuminating light center forms an ideal high-brightness hot zone.
  • the second light source module 320 further includes a light conversion layer (not shown in the figure), which is disposed on the optical path of the light emitted by the laser light source 321 and may be disposed on the laser light source 321 or away from the laser light source. 321, configured to convert the second light into the third light, and the peak wavelength or light distribution of the third light is different from the second light.
  • a light conversion layer (not shown in the figure), which is disposed on the optical path of the light emitted by the laser light source 321 and may be disposed on the laser light source 321 or away from the laser light source.
  • 321 configured to convert the second light into the third light, and the peak wavelength or light distribution of the third light is different from the second light.
  • Other constituent elements in this embodiment are the same as those in Embodiment 3. For descriptions of other elements, refer to Embodiment 3.
  • the illuminance of the illuminating light center output by the illuminating light source system is high, and the illuminating light center forms a hot zone
  • the illumination light source system provided by the present invention can increase the central brightness of the illumination light source so that it can meet the requirements of high central brightness of automobile headlights. And because the first convergence point is smaller than the light emitting surface of the LED light source, the area of the light emitting surface of the light source does not increase while increasing the brightness of the light source, which is beneficial to reducing the volume of the light source and improving the flexibility of the light source design.
  • the automobile lamp should also include the necessary parts such as the housing, lampshade, and driving power.

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  • General Engineering & Computer Science (AREA)
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Abstract

一种照明光源***，包括第一光源(110)和第二光源模组(120)，第一光源(110)包括至少两个LED光源(111)，用于出射第一光，第二光源模组(120)包括激光光源(121)和收集透镜(122)。激光光源(121)出射的第二光经收集透镜(122)收集、会聚于第一会聚点，第一会聚点与LED光源(111)的出光面相交，且位于至少两个LED光源(111)之间。第一会聚点处第二光的发散角小于第一光源(110)的发散角。采用高亮度的激光光源(121)，且第二光的发散角度较小，使得光源在远距离的照明光斑中心仍然具有较高照度。

Description

一种照明光源*** 技术领域
本发明涉及照明领域，特别是涉及一种中心高亮度的照明光源。
背景技术
车辆用照明光源主要有卤素灯、氙气灯和LED光源。由于LED具有节能环保、使用寿命长、体积小、重量轻、结构坚固、工作电压低等优点，在汽车照明领域应用越来越广。
单个LED芯片的最大光通量不超过300流明，现有汽车大灯一般采用LED阵列实现较大的照明范围和较大的光通量。但由于LED光源出光面较大，出射角度较大，光功率密度较低，LED阵列经光学元件进行配光后的照明光未能满足汽车大灯照明所需的高中心亮度的需求。
发明内容
针对上述现有技术中光源中心亮度不够缺陷，本发明提供一种中心高亮度且体积较小的照明光源,该光源***具备：第一光源，包含至少两个LED光源；第二光源模组，包含激光器和收集透镜，收集透镜用于对光束进行收集、会聚，使第二光会聚于第一会聚点，所述第一会聚点位于LED光源的出光面相交；且第二光在所述第一会聚点处的发散角小于第一光的发散角；所述第一会聚点设于至少两个LED光源之间。由于激光光源具有高亮度和高能量密度，且激光光源会聚点处的发散角较LED光源的发散角度小，使得光源的中心亮度较高，中心的高亮度光的发散角小，能够在远距离的位置仍得到中心照度高的光斑。
在一个实施例中，所述第一会聚点的中心至所述LED光源的出光面的距离小于0.03mm，该照明光源***出射的照明光均可形成理想的汽车大灯照明光，光源的中心亮度较大。
在一个实施方式中，所述第二光在所述第一会聚点处的发散角小于所述第一光在所述LED光源的发散角的80％，当第二光在所述第一会聚点的发散角较第一光源的越小时，其光源的中心亮度将越大。
在一个实施方式中，所述第二光源模组还包括光转换层，其设置在所述激光光源和所述收集透镜之间的光路上，可吸收激光，发射第三光，所述第三光与所述激光的波长或光分布不同。当高亮度和高功率密度的蓝激光激发光转换层，可获得高能量密度的第三光，使照明光源***可满足不同场景下的照明光中心高亮度的需求。
在一个实施方式中，所述照明光源***还包括光收集***，包括抛物面反光杯、透镜或者椭球面反光杯和透镜的组合，其设置在所述第一光源和所述第二光源模组的出光面一侧，用于反射或者投射第一光源和第二光源模组出射的光。具体地，光收集***的前焦点位于所述第一会聚点处，将中心高亮度的第二光或第三光反射或投射至照明光的中心区域，使得从光源***中出射的照明光中心区域亮度较高，且照明光照射区域较大。
在一个实施方案中，所述照明光源***还包括基板和散热器，所述LED光源设置在所述基板上，所述散热器连接在基板远离出光面侧，其特征在于，所述基板和所述散热器包含一通孔，所述LED光源在基板的通孔两边直线排列或在基板的通孔四周环绕排列，所述散热器对所述 LED光源进行散热处理，延长照明光源***的使用寿命。
在一个实施方案中，所述散热器包含一凹槽结构，所述凹槽的位置与基板上通孔的位置重合，所述激光光源设置在凹槽的底部，所述散热器对所述激光光源和LED光源进行散热处理，实现利用同一个散热器对两个光热源的散热，有利于精简散热结构，进一步延长照明光源***的使用寿命。
附图说明
图1为本发明实施例1中照明光源***的一个实施例的侧视图；
图2为本发明实施例1中照明光源***的一变形实施例的侧视图；
图3为本发明实施例2中照明光源***的一个实施例的侧视图；
图4为本发明实施例3中照明光源***的一个实施例的侧视图；
图5为本发明实施例3中照明光源***的一变形实施例的侧视图；
图6为本发明实施例3中照明光源***的又一变形实施例的侧视图；
图7为本发明实施例3中照明光源***的出射光的效果图；
图8为本发明实施例3中照明光源***的出射光的效果图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本申请的一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本发明中提及的第一会聚点为一具有特定体积的球面或类球面范围内的所有区域，该区域内的各个位置的照度值大于该区域内最大照度值的1/e，第一会聚点的光向前照射而形成汽车大灯照明光的热区。
汽车车灯的亮度及汽车照明光分布将影响汽车安全驾驶，现有LED光源车灯，由于单个LED芯片的最大光通量不超过300流明，一般采用LED阵列实现较大的照明范围和较高的光通量，其存在以下两个问题，一方面由于LED光源光功率密度较小，经光收集***进行配光处理后，其照明光的中心照度无法满足车灯大灯的标准；另一方面，采用LED阵列作为光源，由于其出光面较大将使得光收集***的体积较大，车灯体积较大。为解决以上技术问题，本发明提供如下实施方式。
下面结合附图和实施方式对本发明实施例进行详细说明。
实施例1
参阅图1，本实施例提供一种照明光源***，包括第一光源110和第二光源模组120；其中，第一光源包括至少两个LED光源111，出射第一光；第二光源模组120包括激光光源121和收集透镜122。激光光源121出射第二光，收集透镜122对第二光进行收集、会聚，使第二光会聚于第一会聚点。进一步，第一会聚点与LED光源111的出光面相交；第一会聚点位于至少两个LED光源111之间；第二光在第一会聚点处的发散角度小于第一光在出光面上的发散角。第一光和第二光在LED光源111的出光面所在平面沿同一方向出射，共同构成所述照明光源***的输出光。
第一光源110，包含至少两个LED光源111，用于出射第一光，第一光为朗伯分布的光，其出光角度为180度。在一个具体的实施方式中， 各LED光源的出光面为1×1mm 2。
第二光源模组120，包含激光光源121和收集透镜122。激光光源121为半导体激光器，用于出射第二光，第二光的亮度和光功率密度均较高，收集透镜122对第二光进行收集、会聚，使第二光会聚于第一会聚点，第一会聚点与LED光源111的出光面相交，本发明人通过大量重复实验发现，第一会聚点的中心至LED光源的出光面的距离小于0.03mm时，对照明光源***出射的照明光的中心亮度和光分布没有影响或影响较小，均可形成理想的汽车大灯照明光的热区。该照明光源***中第一会聚点的大小和(或)第一会聚点处第二光的发散角均可调，可以通过改变收集透镜122凸面的曲率或改变收集透镜122与激光光源121之间的距离使第一会聚点的大小和(或)第一会聚点处第二光的发散角改变。调节第一会聚点直径的大小和(或)第二光会聚点处的发散角的大小，可改变输出照明光的中心光强。本实施例中，第二光在第一会聚点处的发散角小于第一光的发散角，进一步地，第二光在第一会聚点处的发散角至少小于所述第一光在LED光源出光面的发散角的80％。
参见表1和表2，本发明人通过实验和模拟得出第一会聚点的直径在0.5mm～1.0mm范围内变化时照明光源出射的光的光通量及中心照度的变化及第一会聚点处第二光的发散角度在60度～160度范围内变化时照明光源出射的光的光通量及中心照度的变化。第一会聚点的直径越小，该照明光源***输出光的中心照度越大；第一会聚点处第二光的发散角度越小，该照明光源***输出照明光的中心照度越大。
表1第二光会聚点直径与照明光光通量及中心光强的关系：
Figure PCTCN2019076627-appb-000001
表2第二光于第一会聚点处的发散角大小与照明光光通量及中心光强的关系：
Figure PCTCN2019076627-appb-000002
第一会聚点位于至少两个LED光源111之间，举例说明，当照明光源***中包含4个LED光源111时，LED光源111可以是并排排列，第一会聚点位于四个LED光源111的中间位置；也可以是四周型环绕排列，第一会聚点位于4个LED光源111阵列的中心位置。
本实施例中，如图1示出，该照明光源***进一步包括：基板160、散热器170。但是，基板160和散热器170是本发明非必要的，在某些情况下，可以直接将单颗的LED灯珠封装在散热器170上，采用散热器170对LED灯珠进行散热；当LED光源111的输出电流较小的情况下，LED光源111的产热较小，也可以不需要散热器170。在本实施例中，优选将LED光源111设置在基板160上，基板160为铜制的PCB板， 其包含一通孔，LED光源111在通光孔两边直线排列或在通光孔四周环绕排列；基板160设置在散热器170上，基板160通过焊接或粘接方式与散热器170连接。散热器170包含一通孔，散热器170的通孔的位置与基板160的通孔的位置重合，散热器170对LED光源111产生的热量进行散热。
本实施例中，采用银锡焊料(焊片)或金锡焊料(焊片)将基板160与散热器170进行连接，也可以采用银胶将基板160与散热器170进行连接，焊料或者银胶的热导率均较高，LED光源111产生的热量可以从基板160传导至散热器170，延长照明光源***的寿命。
图2示出本实施例的一变形实施例，该照明光源***包括LED光源111、激光光源121、收集透镜122、基板160及散热器180，其中，LED光源111、激光光源121、收集透镜122、基板160与实施例1中一致，在此不做赘述，参见实施例1中的相关描述。该实施例与实施例1的区别仅在于散热器180包含一凹槽结构，散热器180凹槽结构的位置与基板160的通孔的位置重合，散热器180可同时对LED光源111和激光光源121进行散热，可进一步延长照明光源***的寿命。
本实施中的照明光源***输出的照明光中心照度较高，可满足汽车大灯中心高亮度的需求。
实施例2
参阅图3，在本实施例中，该照明光源***包括第一光源210，第二光源模组220，基板260及散热器270。本实施例与实施例一的区别仅在于第二光源模组220进一步包括光转换层223，关于其他组成元件的描述参见实施例一。其中，光转换层223设置在激光光源221上，也可以远离激光光源221，位于激光传输光路上。光转换层230可以是透射式(即光入射面和出射面位于光转换层的两侧)、反射式(即光入射 面和出射面位于光转换层的同一侧)，也可以是荧光腔体(即光在光转换层内可被循环利用)。光转换层230包括基体以及光转换中心和/或光散射中心，基体可以是硅胶、玻璃或者陶瓷；光转换中心可以包含黄色荧光粉或者量子点，或包含绿色荧光粉或量子点和红色荧光粉或量子点；光散射中心可以是氧化钛微粒、氧化硅微粒、氧化铝微粒等，微粒的折射率与基体的折射率不同。光转换层230可吸收激光，出射第三光，第三光与激光的波长或者光分布不同。由于激光光源221出射的第二光的亮度和光功率密度均较大，故光转换层230出射的第三光的亮度也较大。激光光源221出射的第二光经光转换层转换后以出射第三光，第三光的峰值波长或光分布与第二光不同，被收集透镜122收集、会聚，使第三光会聚于第一会聚点，且第一会聚点与LED光源211的出光面相交，且第一会聚点的中心至LED光源211出光面的距离小于0.03mm；第一会聚点位于至少两个LED光源之间。第一会聚点的大小和(或)第一会聚点处第三光的发散角均可调。本实施例中，第一会聚点处第三光的发散角小于第三光会聚点处的发散角，进一步地，第三光在第一会聚点处的发散角至少小于所述第一光在LED光源出光面的发散角的80％。
本实施中的照明光源***输出的照明光中心照度较高，可满足汽车大灯中心高亮度的需求。
实施例3
参阅图4，在本实施例中，该照明光源***包括第一光源310，第二光源模组320和抛物面反光杯330，其中第一光源310包含至少两个LED光源311；第二光源模组320包含激光光源321和收集透镜322。参阅图4，第二光源模组320出射的第二光经收集透镜322收集、会聚，第二光会聚于第一会聚点，第一会聚点与LED光源311的出光面相交，且第一会聚点的中心距LED光源311出光面的距离小于0.03mm，第一 会聚点的大小和(或)第一会聚点出第二光的发散角均可调；在本实施例中，第二光在第一会聚点处的发散角小于第一光的发散角，进一步地，第二光在第一会聚点处的发散角至少小于所述第一光在LED光源出光面的发散角的80％。第一会聚点位于至少两个LED光源311之间；进一步地，第一会聚点位于抛物面发光杯330的焦点位置。第一光和第二光在LED光源311的出光面所在平面沿同一方向出射，经抛物面发光杯330反射后从光源***出射至外部，参阅图7，第一会聚点位于抛物面反光杯330的焦点处，抛物面反光杯330反射第一光和第二光使其从光源出射，第二光源模组320出射的第二光形成照明光的中心区域A，第一光源310出射的第一光形成照明光的外周区域B，且中心区域A的照度远大于外周区域B的照度。参阅图8，由于激光光源321具有更高的亮度和更小的光学扩展量，其出射光照射距离较LED光源311出射光更远。
在本实施例中，该照明光源***输出的照明光中心照度较高，照明光中心形成理想高亮度的热区。
图5所示为本实施例的一变形实施例，该照明光源***包括第一光源310，第二光源模组320和透镜340，本实施例与实施例3的区别仅在于光收集***为透镜340，其他组成元件的描述参见实施例3。其中，透镜340包括曲面透镜，或菲涅尔透镜，也可以替换为TIR透镜。第一会聚点位于透镜340的焦点处，透镜340将第一光源和第二光成像在光源出光面前方位置，该照明光源***输出的照明光中心照度较高，照明光中心形成理想高亮度的热区。
图6所示为本实施例的又一变形实施例，该照明光源***包括第一光源310，第二光源模组320和椭球面反光杯351与透镜352的组合， 本实施例与实施例3的区别仅在于光收集***为椭球面反光杯351与透镜352的组合，其他组成元件的描述参见实施例3。第一会聚点位于椭球面反光杯351的焦点处，椭球面反光杯351对第一光和第二光反射、会聚，使光束会聚于透镜352的焦点处，经透镜352成像在光源出光面的前方位置，该照明光源***输出的照明光中心照度较高，照明光中心形成理想高亮度的热区。
在另一变形实施例中，第二光源模组320还包括光转换层(未在图中示出)，设置在激光光源321出射光的光路上，可设置在激光光源321上或者远离激光光源321，用于将第二光转换为第三光，第三光的峰值波长或光分布与第二光不同。该实施例中其他组成元件与实施例3相同，其他元件的描述参见实施例3。该照明光源***输出的照明光中心照度较高，照明光中心形成理想高亮度的热区。
本发明提供的照明光源***，可提高照明光源的中心亮度，使其满足汽车大灯高中心亮度的要求。且由于第一会聚点较LED光源的出光面小，在增大光源亮度的同时，光源出光面的面积并未增大，有益于减小光源的体积和提高光源设计的灵活性。
该汽车车灯除了包含上面的照明光源***，还应该包括外壳、灯罩、驱动电源等必要部件。
以上所述仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (10)

  1. 一种照明光源***，具备：
    第一光源，包含至少两个LED光源，用于出射第一光；
    第二光源模组，用于出射第二光，所述第二光源模组包含激光光源和收集透镜，所述收集透镜用于将所述第二光会聚于第一会聚点，所述第一会聚点与所述LED光源的出光面所在平面相交；
    所述第一会聚点位于所述至少两个LED光源之间；
    所述第二光在所述第一会聚点处的发散角小于所述第一光在所述LED光源的出光面的发散角；
    所述第一光和所述第二光在所述LED光源的出光面所在平面沿同一方向出射，共同构成所述照明光源***的输出光。
  2. 如权利要求1所述的照明光源***，其特征在于，所述第一会聚点的中心至所述LED光源的出光面所在平面的距离小于0.03mm。
  3. 如权利要求1所述的照明光源***，其特征在于，所述第二光在所述第一会聚点处的发散角至少小于所述第一光在所述LED光源出光面的发散角的80％。
  4. 如权利要求1所述的照明光源***，所述第二光源模组还包括：光转换层，其设置于所述激光光源与所述收集透镜之间的光路上，可吸收激光，出射第三光，所述第三光与所述第二光的峰值波长或光分布不同。
  5. 如权利要求1所述的照明光源***，该照明光源还包括：光收集***，其设置于所述第一光源和所述第二光源模组的出光侧，用于反射或投射所述第一光源和所述第二光源模组出射的输出光。
  6. 如权利要求5所述的照明光源***，其特征在于，所述光收集***的前焦点位于所述第一会聚点处。
  7. 如权利要求5所述的照明光源***，所述光收集***包括抛物面反光杯、椭球面反光杯和/或透镜。
  8. 如权利要求1所述的照明光源***，所述照明光源进一步包括：基板、散热器，所述LED光源设置在所述基板上，所述散热器连接在所述基板远离出光面侧，其特征在于，所述基板和所述散热器均包含一通孔，且通孔位置重合，所述LED光源在基板的通孔两边直线排列或在所述基板或所述散热器的通孔四周环绕排列，所述散热器对所述LED光源进行散热处理。
  9. 如权利要求8所述的照明光源***，所述散热器包含一凹槽结构，所述凹槽的位置与基板上通孔的位置重合，所述激光光源设置在凹槽的底部，所述散热器对所述激光光源和LED光源进行散热处理。
  10. 一种车灯，包括权利要求1至9中任一项所述的照明光源***。
PCT/CN2019/076627 2018-07-24 2019-03-01 一种照明光源*** WO2020019712A1 (zh)

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CN114484383A (zh) * 2020-10-26 2022-05-13 深圳市绎立锐光科技开发有限公司 一种混合光源装置
CN219389500U (zh) * 2022-11-08 2023-07-21 深圳市绎立锐光科技开发有限公司 一种照明装置

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