CN110925701A - High beam and low beam integrated vehicle headlight - Google Patents
High beam and low beam integrated vehicle headlight Download PDFInfo
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- CN110925701A CN110925701A CN201911394596.7A CN201911394596A CN110925701A CN 110925701 A CN110925701 A CN 110925701A CN 201911394596 A CN201911394596 A CN 201911394596A CN 110925701 A CN110925701 A CN 110925701A
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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
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
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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
- 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]
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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
- 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
- F21S41/16—Laser light sources
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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
- 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
- F21S41/176—Light sources where the light is generated by photoluminescent material spaced from a primary light generating element
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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
- 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
- F21S41/18—Combination of light sources of different types or shapes
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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
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
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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
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
- F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
- F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention discloses a high-beam and low-beam integrated vehicle headlamp, which comprises a heat dissipation support, a low-beam light source group and a high-beam light source group which are respectively arranged at the upper side and the lower side of the heat dissipation support, a low-beam light reflecting bowl corresponding to the low-beam light source group and a high-beam light reflecting bowl corresponding to the high-beam light source group, wherein the low-beam light source group comprises a first LED light source unit which comprises a plurality of first LED light sources; the far-light source group comprises an excitation light unit and a wavelength conversion unit, the excitation light unit comprises a laser source unit and a second LED light source unit, and the position of the wavelength conversion unit corresponds to the focus of the far-light reflecting bowl. Set up the excitation light unit that constitutes by laser source unit and second LED light source unit and arouse wavelength conversion unit jointly in far-reaching light source group, the laser beam that laser source unit launched has collimation nature good, and the characteristic that the energy is concentrated can improve far-reaching light beam's central illuminance and light beam concentration nature greatly, sets up second LED light source unit simultaneously and is used for the light filling, further improves far-reaching light beam's illuminating effect.
Description
Technical Field
The invention relates to the technical field of illumination, in particular to a vehicle headlamp integrating high beam and low beam.
Background
With the development of semiconductor technology, LED (Light Emitting Diode) Light sources have the advantages of high efficiency, energy saving, environmental protection, low cost, long service life, etc., and are gradually replacing traditional incandescent lamps and energy saving lamps, becoming a general illumination Light source.
In the existing LED automobile headlamp, an LED light source is positioned at the focus of an automobile lamp reflector, and light beams emitted by the LED light source are collected by the automobile lamp reflector and distributed by a rear-end optical system (comprising a baffle, a lens and the like) to finally project required far and near light field distribution. The automobile lamp can obtain the light distribution of the dipped beam of the automobile headlamp meeting the requirement, however, when the high beam is formed, the problems of obviously insufficient central illumination and non-concentrated light beams exist generally due to the limitation of the brightness of the current LED light source, and the requirement of practical application cannot be met.
Disclosure of Invention
The invention provides a vehicle headlamp integrating high beam and low beam, which aims to solve the problems of insufficient central brightness of high beam and non-centralized beam in the prior art.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a high beam and low beam integrated vehicle headlamp comprises a radiating support, a low beam light source group and a high beam light source group which are respectively arranged at the upper side and the lower side of the radiating support, a low beam light reflecting bowl corresponding to the low beam light source group, a high beam light reflecting bowl corresponding to the high beam light source group, a movable light screen and a lens which are arranged at the front end of the radiating support and a radiating fin group arranged at the rear end of the radiating support, wherein the low beam light source group comprises a first LED light source unit which comprises a plurality of first LED light sources; the far-reaching headlamp group includes exciting light unit and wavelength conversion unit, exciting light unit includes laser source unit and second LED light source unit, the position of wavelength conversion unit with the focus of far-reaching headlamp reflector corresponds, the laser beam of laser source unit transmission and the light beam of second LED light source unit transmission throw respectively extremely on the wavelength conversion unit and excite fluorescence, fluorescence passes through after the reflection of far-reaching headlamp reflector according to the outgoing of assigned direction.
Further, the light that short-distance beam light source group sent passes through the parallel outgoing of oblique below of following after the reflection of short-distance beam reflector, the light that the high beam light source group sent passes through the parallel outgoing of oblique top of following after the reflection of high beam reflector.
Furthermore, the first LED light sources are packaged into a whole by taking the focus of the dipped beam reflector as the center.
Furthermore, laser source unit and wavelength conversion unit are located respectively the both sides of far-reaching beam reflector, be equipped with on the far-reaching beam reflector and be used for seeing through the logical light portion of laser beam.
Further, the laser source unit further includes one or a combination of two or more of a collimating unit, a beam angle changing unit, and a focusing unit, and the collimating unit, the beam angle changing unit, and the focusing unit are disposed along the optical path.
Further, the laser source unit comprises one or more laser sources, and the light-passing part is provided with one or more laser sources.
Further, the second LED light source unit includes a substrate and at least one LED chip, the wavelength conversion unit includes at least one phosphor layer, the phosphor layer is disposed on the LED chip or on the substrate, one phosphor layer is disposed above each LED chip, and the lower portion is disposed on the substrate.
Furthermore, the high beam reflector is a curved mirror, the wavelength conversion unit is located at a focus of the curved mirror, the LED chip and the phosphor layer are respectively provided with one, and the laser beam is projected to a center of an upper surface of the phosphor layer.
Furthermore, the high beam reflector is a curved mirror, the number of the LED chips and the number of the phosphor layers are multiple, the phosphor layers are closely arranged and located at the focus of the curved mirror, one phosphor layer corresponds to each of the LED chips, a reflective interface is arranged between the LED chip and the substrate, and the laser beam is projected onto each phosphor layer or one of the phosphor layers.
Furthermore, the high beam reflector is formed by splicing a plurality of curved mirrors, the LED chips and the fluorescent powder layer are respectively provided with a plurality of fluorescent powder layers which are distributed in a gap manner, each fluorescent powder layer is located at a focus corresponding to one curved mirror, one fluorescent powder layer corresponds to the upper part of each LED chip, a reflection interface is arranged between each LED chip and the substrate, and the laser beam is projected onto each fluorescent powder layer or one of the fluorescent powder layers.
The invention provides a high-beam and low-beam integrated vehicle headlamp, which comprises a heat dissipation support, a low-beam light source group and a high-beam light source group which are respectively arranged at the upper side and the lower side of the heat dissipation support, a low-beam light reflecting bowl corresponding to the low-beam light source group, a high-beam light reflecting bowl corresponding to the high-beam light source group, a movable light shielding plate and a lens which are arranged at the front end of the heat dissipation support, and a heat dissipation sheet group arranged at the rear end of the heat dissipation support, wherein the low-beam light source group comprises a first LED light source unit which comprises a plurality of first LED light sources; the far-reaching headlamp group includes exciting light unit and wavelength conversion unit, exciting light unit includes laser source unit and second LED light source unit, the position of wavelength conversion unit with the focus of far-reaching headlamp reflector corresponds, the laser beam of laser source unit transmission and the light beam of second LED light source unit transmission throw respectively extremely on the wavelength conversion unit and excite fluorescence, fluorescence passes through after the reflection of far-reaching headlamp reflector according to the outgoing of assigned direction. Set up the excitation light unit that constitutes by laser source unit and second LED light source unit and arouse wavelength conversion unit jointly in far-reaching light source group, the laser beam that laser source unit launched has collimation nature good, and the characteristic that the energy is concentrated can improve far-reaching light beam's central illuminance and light beam concentration nature greatly, sets up second LED light source unit simultaneously and is used for the light filling, further improves far-reaching light beam's illuminating effect.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a high beam and low beam integrated vehicle headlamp of the present invention;
FIG. 2 is a schematic diagram of a low beam light source set according to an embodiment of the present invention;
FIG. 3 is a schematic view of one embodiment of the present invention in which a laser beam is projected onto the upper surface of a wavelength conversion unit;
FIG. 4 is a schematic structural diagram of a wavelength conversion unit according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of another embodiment of a wavelength conversion unit according to the present invention;
fig. 6 is a schematic structural diagram of an embodiment of the high beam reflector comprising a plurality of curved mirrors according to the present invention.
Shown in the figure: 10. a heat dissipation bracket; 20. a low beam light source group; 210. a first LED light source; 311. a laser light source unit; 312. a second LED light source unit; 313. a focusing unit; 314. a substrate; 315. an LED chip; 316. a reflective interface; 320. a wavelength conversion unit; 321. a phosphor layer; 317. a laser source; 40. a near-light reflecting bowl; 50. a high beam reflector; 510. a light-passing part; 520. a curved mirror; 60. a movable visor; 70. a lens; 80. a heat sink set.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
as shown in fig. 1-3, the present invention provides a vehicle headlamp integrating a high beam and a low beam, which comprises a heat dissipating support 10, a low beam light source group 20 and a high beam light source group respectively disposed at the upper and lower sides of the heat dissipating support 10, a low beam reflector 40 corresponding to the low beam light source group 20, a high beam reflector 50 corresponding to the high beam light source group, a movable light shielding plate 60 and a lens 70 disposed at the front end of the heat dissipating support 10, and a heat dissipating sheet group 80 disposed at the rear end of the heat dissipating support 10, wherein the low beam light source group 20 comprises a first LED light source unit, and the first LED light source unit comprises a plurality of first LED light sources 210; the far-beam light source group includes exciting light unit and wavelength conversion unit 320, the exciting light unit includes laser source unit 311 and second LED light source unit 312, the position of wavelength conversion unit 320 with far-beam reflector 50's focus corresponds, the laser beam that laser source unit 311 launched and the light beam that second LED light source unit 312 launched throw respectively to on the wavelength conversion unit 320 and stimulate fluorescence, fluorescence passes through after the reflection of far-beam reflector 50 according to the outgoing of assigned direction. Specifically, the light of first LED light source 210 outgoing in the low beam light source group 20 forms the low beam after passing through the reflection of low beam reflector 40, the fluorescence that laser source unit 311 and second LED light source unit 312 in the high beam light source group arouse the phosphor powder in the wavelength conversion unit 320 jointly and send forms the high beam after the reflection of high beam reflector 50, because the laser beam that laser source unit 311 launches has collimation nature good, the characteristic of energy concentration, central illuminance and the light beam concentration nature that can improve the high beam greatly, set up second LED light source unit 312 simultaneously and be used for the light filling, further improve the illuminating effect of high beam. When the low beam mode is needed, the movable light shielding plate 60 shields the high beam light beam, so that the low beam light beam is emitted through the lens to form a low beam light, and when the high beam mode is needed, the movable light shielding plate 60 shields the low beam light beam, so that the high beam light beam is emitted through the lens 70 to form a high beam light.
Preferably, passing light reflector 40 and distance light reflector 50 are the curved surface structure, distance light reflector 50's camber is less than distance light reflector 50's camber, and when practical application, the facula of passing light beam is wide more than high ellipse, and consequently the passing light reflector 40 camber that corresponds is less, and the facula of distance light beam is high more than wide ellipse, and consequently the distance light reflector 50 camber that corresponds is great.
With reference to fig. 1, the light emitted from the low-beam light source set 20 is reflected by the low-beam light reflecting bowl 40 and then emitted in parallel along an oblique lower direction, and finally refracted by the lens 70 to form a low-beam light beam. The light emitted by the high beam light source group is reflected by the high beam reflector 50 and then exits in parallel along the oblique upper direction, and finally is refracted by the lens 70 to form a high beam.
With reference to fig. 2, the first LED light sources 210 are integrally packaged with the focus of the low-beam reflector 40 as a center. In this embodiment, there are 9 first LED light sources 210 fixed on the upper surface of the heat dissipation bracket 10, and an array of 3 × 3 is formed by taking the focus of the low-beam light reflecting bowl 40 as the center, but the number of the first LED light sources may be other, and is not limited herein.
Preferably, the laser source unit 311 and the wavelength conversion unit 320 are respectively disposed on two sides of the high beam reflector 50, and the high beam reflector 50 is provided with a light transmitting portion 510 for transmitting the laser beam. Specifically, the number of the light transmitting portions 510 may be one or more, and may be through holes, or through holes provided with a transparent member that can transmit laser beams, or a transparent member that can transmit laser beams and is integrated with the high beam reflector 50, where the transparent member that can transmit laser beams may be a transparent plate with a filter, and the transparent plate may transmit laser beams and reflect fluorescence, i.e., white light, excited by the wavelength conversion unit 320, so that the fluorescence emitted by the wavelength conversion unit 320 can be prevented from leaking from the light transmitting portions 510. The light-passing part 510 is used to guide the laser beam to the wavelength conversion unit 320, and may be an oval, a circle, or other shape, and has a size adapted to the diameter of the laser beam, so that the laser beam passes through. The laser source unit 311 is installed on the other side of the wavelength conversion unit 320 opposite to the high beam reflector 50, so that the structure and position of the laser source unit 311 can be flexibly designed according to the used space conditions and can be conveniently replaced, and of course, the laser source unit 311 can also be installed on the same side of the wavelength conversion unit 320 as the high beam reflector 50 as the second LED light source unit 312, so that the structure of the light emitting device can be further simplified.
Preferably, the laser source unit 311 includes one or more laser sources 317, which are designed according to the power of output light, particularly the central illumination, and of course, a plurality of laser sources 317 may be disposed in the laser source unit 311, and the number of currently operating laser sources 317 is selected according to the need when in use, for example, the laser sources are selected through a switch or other elements, so that the convenience of use and the general performance can be further improved. The number of the light-passing parts 510 is one or more, specifically, when there is only one laser source 317, there is also one light-passing part 510 correspondingly; when the number of the laser sources 317 is multiple, that is, greater than or equal to 2, the number of the light-passing portions 510 may be only one, and at this time, the light beams emitted by the multiple laser sources 317 share one light-passing portion 510; of course, the light-passing portion 510 may be provided in plural, corresponding to the laser light sources 317 one by one, and each light-passing portion 510 is used for guiding the laser beam emitted by the corresponding laser light source 317 to the wavelength conversion unit 320. In this embodiment, the laser source 317 is preferably a semiconductor laser, that is, a laser diode, and has the characteristics of small size and long service life, so that the size of the device is further reduced, and the service life and stability are improved. The semiconductor laser used here may be an element having 1 light emitting point on 1 chip, or may be an element having a plurality of light emitting points on 1 chip.
Preferably, the laser source unit 311 further includes one or a combination of two or more of a collimating unit (not shown), a beam angle changing unit (not shown), and a focusing unit 313, and the collimating unit, the beam angle changing unit, and the focusing unit 313 are disposed along the optical path. The collimating unit may be disposed at an outlet of the laser source 317, and usually employs a collimating lens or other beam collimating element for converting the output laser light into collimated parallel light, so as to further improve the collimation of the laser beam. The beam angle changing unit is used for deflecting the laser beam to change the advancing direction of the laser beam, so that the whole system is compact in structure, the beam angle changing unit can adopt a plane reflector or a curved reflector, can also adopt a metal film or a dielectric film and the like, the same effect can be achieved, and certainly, when the using space is not limited, the angle of the semiconductor laser can be directly adjusted to save the beam angle changing unit, so that the cost is reduced. The focusing unit 313 may adopt a focusing lens or other focusing elements for converging the laser beam to be better projected onto the wavelength conversion unit 320 through the light-transmitting part 510, and at the same time, the curved surface of the focusing unit 313 may be adjusted to form light with a proper size when the laser beam is incident on the wavelength conversion unit 320, as shown in fig. 1, only the focusing unit 313 is used in the laser source unit 311, and in actual use, one of the collimating unit, the beam angle changing unit and the focusing unit 313 may be selected for use alone or two or three of them may be selected for use in combination, and the positions of the three may be arranged according to the use space requirement, as long as it is ensured that the laser beam can be projected onto the wavelength conversion unit 320 through the light-transmitting part 510.
Preferably, the second LED light source unit 312 includes a substrate 314 and at least one LED chip 315, the wavelength conversion unit 320 includes at least one phosphor layer 321, the phosphor layer 321 is disposed on the LED chip 315 or on the substrate 314, one phosphor layer 321 is disposed above each LED chip 315, and the phosphor layer 321 is disposed below the LED chip 314.
Preferably, the high beam reflector 50 is a curved mirror, the wavelength conversion unit 320 is located at a focal point of the curved mirror, the LED chip 315 and the phosphor layer 321 are respectively provided with one, and the laser beam is projected to a center of an upper surface of the phosphor layer 321. As shown in fig. 3, the phosphor layer 321 is located above the LED chip 315, and the lower side of the LED chip 315 is connected to the substrate 314 through the reflective interface 316, specifically, the substrate 314 has two functions, namely, conducting the heat generated by the LED chip 315 downwards, and providing an electrode on the substrate 314, which is connected to an external power source for supplying power to the LED chip 315. In this embodiment, the LED chip 315 is a light emitting diode, and is integrated on a chip, and emits a light beam, that is, an excitation light, through electrical input spontaneous radiation of the substrate 314, a part of the excitation light is transmitted upward and enters the phosphor layer 321 to excite the phosphor portion therein to generate fluorescence, and another part of the excitation light is transmitted downward and incident on the reflective interface 316, and the reflective interface 316 has a higher reflectivity, and the part of light is also reflected onto the phosphor layer 321 to excite the phosphor portion therein to generate fluorescence, so that the excitation light emitted by the LED chip 315 is fully utilized, and the utilization rate of the LED chip 315 is improved.
Because the reflective interface 316 with high reflectivity is provided between the LED chip 315 and the substrate 314, it can be ensured that almost all the fluorescent light output by the fluorescent powder layer 321 is reflected by the high-beam reflector 50 and then emitted, and thus the fluorescent powder layer 321 can be ensured to have high light extraction efficiency. In this embodiment, the fluorescent powder layer 321 is detachably connected to the LED chip 315, so as to be convenient for replacement, and it may be adhered to the LED chip 315 through an adhesion process, or may be disposed on the LED chip 315 through a transparent fastener or the like, or may be in other manners as long as the detachable connection function is achieved. The upper and lower surfaces of the phosphor layer 321 can be excited by the output light from the laser source and the LED chip 315, so that the phosphor layer 321 has higher brightness, and the requirement of high beam application in the automotive headlamp is met. Certainly, the phosphor layer 321 and the corresponding LED chip 315 may be packaged together, or even the wavelength conversion unit 320 and the LED chip 315 may be packaged together, so as to reduce the assembly difficulty and improve the stability of the relative position of the two, however, it is inconvenient to replace the phosphor layer 321 or the LED chip 315 by this method, and in addition, the phosphor layer 321 and the LED chip 315 may not be in contact, for example, suspended on the LED chip 315, as long as the stability of the relative position of the two is ensured.
Preferably, the high beam reflector 50 is a curved mirror 520, the number of the LED chips 315 and the number of the phosphor layers 321 are multiple, the multiple phosphor layers 321 are closely arranged and located at a focus of the curved mirror 520, one phosphor layer 321 corresponds to the upper side of each LED chip 315, a reflection interface 316 is arranged between each LED chip 315 and the substrate 314, and the laser beam is projected onto each phosphor layer 321 or one of the phosphor layers 321. Specifically, the number of the LED chips 315 and the number of the phosphor layers 321 are multiple and the number of the LED chips 315 and the number of the phosphor layers 321 are the same, that is, the LED chips 315 and the phosphor layers 321 correspond to each other, and the laser beams are projected onto one of the phosphor layers 321, as shown in fig. 4, the number of the LED chips 315 and the number of the phosphor layers 321 are three, or certainly 2 or more than 4, and the laser beams are closely arranged at the focus of the far-light reflector 50 along a straight line, and are projected onto the upper surface of the second phosphor layer 321, or certainly onto the upper surfaces of other phosphor layers 321, and the laser beams are projected onto a central area formed by arranging the plurality of phosphor layers 321 under a normal condition, so that the central illumination of a. Alternatively, the number of the LED chips 315 and the number of the phosphor layers 321 are multiple, one phosphor layer 321 is added to each of the LED chips 315, one phosphor layer 321 is disposed above each of the LED chips 315, the laser beam is projected onto the upper surface of the extra phosphor layer 321, and the LED chips 315 are not disposed below the phosphor layers 321 but directly disposed on the substrate 314, so that the thermal resistance between the phosphor layers 321 and the substrate 314 can be reduced, and the heat dissipation speed of the phosphor layers 321 is increased.
As shown in fig. 5 to 6, the high beam reflector 50 is formed by splicing a plurality of curved mirrors 520, the LED chips 315 and the phosphor layers 321 are respectively provided in plurality, and the plurality of phosphor layers 321 are distributed at intervals, each phosphor layer 321 is located at a focus of one corresponding curved mirror 520, one phosphor layer 321 corresponds to the upper side of each LED chip 315, a reflective interface 316 is provided between each LED chip 315 and the substrate 314, and the laser beam is projected onto each phosphor layer 321 or one of the phosphor layers 321. Specifically, the high beam reflector 50 is formed by splicing a plurality of curved mirrors 520, each curved mirror 520 corresponds to a focus, the surface shape of the curved mirror 520 may be a paraboloid, an ellipsoid or other curved surfaces, each phosphor layer 321 is located at the focus corresponding to one curved mirror 520, the number of the phosphor layers 321 may be the same as the number of the curved mirrors 520, the two may be in one-to-one correspondence, or may be less than the number of the curved mirrors 520, a plurality of the phosphor layers 321 may be arranged along a straight line or in other ways at intervals, and in order to improve the illumination uniformity, the pattern formed by the arrangement preferably presents an axisymmetric or centrosymmetric pattern. The laser beam may be projected to the upper surface of the phosphor layer 321 positioned in the middle of the plurality of phosphor layers 321 or may be projected to the upper surface of each phosphor layer 321. As shown in fig. 5, three laser beams are respectively arranged on the LED chip 315 and the phosphor layer 321 to project onto the upper surface of the phosphor layer 321 located at the center, but may be 2 or more than 4 laser beams, and at this time, the laser beams may project onto the upper surface of each phosphor layer 321. Alternatively, the number of the LED chips 315 and the number of the phosphor layers 321 are both multiple, and one more phosphor layer 321 is provided than the LED chips 315, and each phosphor layer 321 is located at a focus of the corresponding curved mirror 520. The plurality of phosphor layers 321 may be arranged in a line or other manner with a gap therebetween, but in order to improve the illumination uniformity, the pattern formed by the arrangement preferably has an axisymmetric or a centrosymmetric pattern. The laser beam is projected onto the upper surface of the phosphor layer 321 among the phosphor layers 321 to increase the illumination of the central region of the light field, and the LED chip 315 is not disposed below the phosphor layer 321 but directly disposed on the substrate 314, so as to reduce the thermal resistance between the phosphor layer 321 and the substrate 314 and increase the heat dissipation speed of the phosphor layer 321.
In summary, the vehicle headlamp integrating high beam and low beam provided by the present invention includes a heat dissipating support 10, a low beam light source group 20 and a high beam light source group respectively disposed at the upper and lower sides of the heat dissipating support 10, a low beam reflector 40 corresponding to the low beam light source group 20, a high beam reflector 50 corresponding to the high beam light source group, a movable light shielding plate 60 and a lens 70 disposed at the front end of the heat dissipating support 10, and a heat dissipating sheet group 80 disposed at the rear end of the heat dissipating support 10, wherein the low beam light source group 20 includes a first LED light source unit, and the first LED light source unit includes a plurality of first LED light sources 210; the far-beam light source group includes exciting light unit and wavelength conversion unit 320, the exciting light unit includes laser source unit 311 and second LED light source unit 312, the position of wavelength conversion unit 320 with far-beam reflector 50's focus corresponds, the laser beam that laser source unit 311 launched and the light beam that second LED light source unit 312 launched throw respectively to on the wavelength conversion unit 320 and stimulate fluorescence, fluorescence passes through after the reflection of far-beam reflector 50 according to the outgoing of assigned direction. Set up in the distance light source group and arouse wavelength conversion unit 320 jointly by the exciting light unit that laser source unit 311 and second LED light source unit 312 constitute, the laser beam that laser source unit 311 launched has collimation nature good, and the characteristic that the energy is concentrated can improve the central illuminance and the light beam concentration nature of distance light beam greatly, sets up second LED light source unit 312 simultaneously and is used for the light filling, further improves the illuminating effect of distance light beam.
Although the embodiments of the present invention have been described in the specification, these embodiments are merely provided as a hint, and should not limit the scope of the present invention. Various omissions, substitutions, and changes may be made without departing from the spirit of the invention and are intended to be within the scope of the invention.
Claims (10)
1. A high beam and low beam integrated vehicle headlamp comprises a radiating support, a low beam light source group and a high beam light source group which are respectively arranged at the upper side and the lower side of the radiating support, a low beam light reflecting bowl corresponding to the low beam light source group, a high beam light reflecting bowl corresponding to the high beam light source group, a movable light screen and a lens which are arranged at the front end of the radiating support and a radiating fin group arranged at the rear end of the radiating support, and is characterized in that the low beam light source group comprises a first LED light source unit which comprises a plurality of first LED light sources; the far-reaching headlamp group includes exciting light unit and wavelength conversion unit, exciting light unit includes laser source unit and second LED light source unit, the position of wavelength conversion unit with the focus of far-reaching headlamp reflector corresponds, the laser beam of laser source unit transmission and the light beam of second LED light source unit transmission throw respectively extremely on the wavelength conversion unit and excite fluorescence, fluorescence passes through after the reflection of far-reaching headlamp reflector according to the outgoing of assigned direction.
2. The high-low beam integrated vehicle headlamp according to claim 1, wherein the light emitted from the low beam light source group is reflected by the low beam reflector and then emitted in parallel obliquely downward, and the light emitted from the high beam light source group is reflected by the high beam reflector and then emitted in parallel obliquely upward.
3. The high-low beam integrated vehicle headlamp according to claim 1, wherein a plurality of the first LED light sources are integrally encapsulated with the focus of the low-beam reflector as a center.
4. The high-beam and low-beam integrated vehicle headlamp according to claim 1, wherein the laser source unit and the wavelength conversion unit are respectively disposed on both sides of the high-beam reflector, and the high-beam reflector is provided with a light transmitting portion for transmitting the laser beam.
5. The high-beam and low-beam integrated vehicle headlamp according to claim 4, wherein the laser light source unit further comprises one or a combination of two or more of a collimating unit, a beam angle changing unit, and a focusing unit, and the collimating unit, the beam angle changing unit, and the focusing unit are disposed along the optical path.
6. The high-low beam integrated vehicle headlamp according to claim 4, wherein the laser light source unit comprises one or more laser light sources, and the light-passing portion is provided with one or more laser light sources.
7. The high-beam and low-beam integrated vehicle headlamp according to claim 4, wherein the second LED light source unit comprises a substrate and at least one LED chip, the wavelength conversion unit comprises at least one phosphor layer, the phosphor layer is disposed on the LED chip or on the substrate, one phosphor layer is disposed above each LED chip, and the other phosphor layer is disposed below the substrate.
8. The high-beam and low-beam integrated vehicle headlamp according to claim 7, wherein the high-beam reflector is a curved mirror, the wavelength conversion unit is located at a focal point of the curved mirror, the LED chip and the phosphor layer are respectively provided with one, and the laser beam is projected to a center of an upper surface of the phosphor layer.
9. The vehicle headlamp integrating the far light and the near light as claimed in claim 7, wherein the far light reflector is a curved mirror, the number of the LED chips and the number of the phosphor layers are multiple, the plurality of phosphor layers are closely arranged and located at a focus of the curved mirror, one phosphor layer corresponds to an upper portion of each LED chip, a reflective interface is arranged between each LED chip and the substrate, and the laser beam is projected onto each phosphor layer or one of the phosphor layers.
10. The vehicle headlamp integrating far light and near light as claimed in claim 7, wherein the far light reflector is formed by splicing a plurality of curved mirrors, the LED chip and the phosphor layer are respectively provided in plurality, and the plurality of phosphor layers are distributed at intervals, each phosphor layer is located at a focus of one corresponding curved mirror, one phosphor layer is located above each LED chip, a reflective interface is provided between each LED chip and the substrate, and the laser beam is projected onto each phosphor layer or one of the phosphor layers.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911394596.7A CN110925701A (en) | 2019-12-30 | 2019-12-30 | High beam and low beam integrated vehicle headlight |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911394596.7A CN110925701A (en) | 2019-12-30 | 2019-12-30 | High beam and low beam integrated vehicle headlight |
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| CN110925701A true CN110925701A (en) | 2020-03-27 |
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| CN201911394596.7A Pending CN110925701A (en) | 2019-12-30 | 2019-12-30 | High beam and low beam integrated vehicle headlight |
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| CN110939911A (en) * | 2019-12-30 | 2020-03-31 | 超视界激光科技（苏州）有限公司 | High beam and low beam integrated vehicle headlight |
| CN111765429A (en) * | 2020-08-03 | 2020-10-13 | 超视界激光科技（苏州）有限公司 | Far and near light integrated laser lighting lamp |
| CN112178582A (en) * | 2020-09-24 | 2021-01-05 | 广州光联电子科技有限公司 | Automobile headlamp |
| CN113446571A (en) * | 2021-08-16 | 2021-09-28 | 佛山市南海区协隆电器有限公司 | Adjustable lighting lamp |
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