CN107304998B - Lighting device and vehicle headlamp device - Google Patents

Lighting device and vehicle headlamp device Download PDF

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Publication number
CN107304998B
CN107304998B CN201610250232.1A CN201610250232A CN107304998B CN 107304998 B CN107304998 B CN 107304998B CN 201610250232 A CN201610250232 A CN 201610250232A CN 107304998 B CN107304998 B CN 107304998B
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China
Prior art keywords
light
wavelength conversion
diaphragm
laser light
laser
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Active
Application number
CN201610250232.1A
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Chinese (zh)
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CN107304998A (en
Inventor
李乾
陈雨叁
许颜正
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Shenzhen Yili Ruiguang Technology Development Co Ltd
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Appotronics Corp Ltd
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Priority to CN201610250232.1A priority Critical patent/CN107304998B/en
Priority to PCT/CN2017/081102 priority patent/WO2017181958A1/en
Publication of CN107304998A publication Critical patent/CN107304998A/en
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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
    • F21K9/64—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
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • 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
    • 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
    • F21K9/65—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction specially adapted for changing the characteristics or the distribution of the light, e.g. by adjustment of parts
    • 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
    • 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
    • F21S41/331—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas
    • F21S41/332—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas with continuity at the junction between adjacent areas
    • 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
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/16—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using sheets without apertures, e.g. fixed

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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 lighting device and a vehicle headlamp device, comprising: a laser light source for emitting laser light; the reflecting cover is arranged on the first substrate, a light outlet is formed between the reflecting cover and the first substrate, and one surface of the reflecting cover facing the first substrate is a reflecting surface; the wavelength conversion device is arranged on the first substrate and positioned between the first substrate and the reflecting cover, the laser light source is arranged on one side of the wavelength conversion device, which is far away from the reflecting cover, the wavelength conversion device comprises a plurality of transmission type wavelength conversion layers, the transmission type wavelength conversion layers are used for receiving laser light, converting the laser light into received laser light and emitting the received laser light to the reflecting surface, and the reflecting surface reflects the received laser light out of the light outlet in a given direction; and the control device is connected with the wavelength conversion device and is used for driving the wavelength conversion device to switch the corresponding transmission type wavelength conversion layer to receive the laser light. According to the technical scheme provided by the invention, the lighting device not only has high light-emitting brightness, but also has a simple structure and a small volume.

Description

Lighting device and vehicle headlamp device
Technical Field
The present invention relates to the field of lighting technologies, and more particularly, to a lighting device and a vehicle headlamp device.
Background
A vehicle headlamp apparatus is one of important components of a vehicle, and the light emission luminance of the vehicle headlamp apparatus is closely related to safe driving of a driver at night. With the development of the lighting technology field, in order to improve the brightness of the vehicle headlamp apparatus, a conventional vehicle headlamp apparatus generally employs a Light Emitting Diode (LED) as a Light Emitting source. However, the conventional vehicle headlamp apparatus using the light emitting diodes as the light emitting source has reached a limit in the emission luminance, and if it is desired to increase the emission luminance of the vehicle headlamp apparatus again, it is necessary to increase the number of the light emitting diodes.
Disclosure of Invention
In view of the above, the present invention provides an illumination device and a vehicle headlamp apparatus, wherein the illumination device not only has high brightness, but also has a simple structure and a small volume; in addition, the lighting device can receive laser by switching different transmission type wavelength conversion layers, so that different light emitting effects of the lighting device are realized, and the flexibility and the adaptability of the lighting device are improved.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
an illumination device, comprising:
a laser light source for emitting laser light;
the reflecting cover is arranged on the first substrate, a light outlet is formed between the reflecting cover and the first substrate, and one surface of the reflecting cover facing the first substrate is a reflecting surface;
the laser device comprises a first substrate, a reflecting cover, a laser light source, a wavelength conversion device and a light source, wherein the first substrate is arranged on the first substrate, the wavelength conversion device is arranged between the first substrate and the reflecting cover, the laser light source is arranged on one side, away from the reflecting cover, of the wavelength conversion device, the wavelength conversion device comprises a plurality of transmission type wavelength conversion layers, the transmission type wavelength conversion layers are used for receiving the laser light, converting the laser light into a received laser light and emitting the received laser light to the reflecting surface, and the reflecting surface reflects the received laser light out of the light outlet in a set direction;
and the control device is connected with the wavelength conversion device and is used for driving the wavelength conversion device to switch the corresponding transmission type wavelength conversion layer to receive the laser.
Optionally, in the wavelength conversion device, a light shaping device is further disposed on a side of the at least one transmissive wavelength conversion layer facing the reflection surface;
the light shaping device is used for converting the color and/or the light spot of the excited light.
Optionally, the light shaping device is a diaphragm.
Optionally, a diaphragm opening of the diaphragm is divided into a light transmitting area and a light shielding area;
when the transmission type wavelength conversion layer corresponding to the diaphragm comprising the light transmitting area and the light shading area receives the laser, the control device also controls the wavelength conversion device to reciprocate at a preset time interval, so that the laser irradiates the light transmitting area and the light shading area at the preset time interval.
Optionally, the diaphragm opening of the diaphragm is an L-shaped diaphragm opening;
when the transmission type wavelength conversion layer corresponding to the diaphragm comprising the L-shaped diaphragm opening receives the laser, the corner opening of the L-shaped diaphragm opening faces the light outlet, and the extending direction of one side of the corner opening of the L-shaped diaphragm opening is parallel to the direction from the diaphragm to the light outlet.
Optionally, the diaphragm opening of the diaphragm is a strip diaphragm opening;
when the transmission type wavelength conversion layer corresponding to the diaphragm comprising the strip diaphragm opening receives the laser, the extending direction of the strip diaphragm opening is vertical or parallel to the direction from the diaphragm to the light outlet.
Optionally, the aperture of the aperture is covered with an optical filter.
Optionally, all the transmissive wavelength converting layers are arranged end to end in a circular ring shape.
Optionally, the transmission-type wavelength conversion layer is a phosphor layer transmission-type wavelength conversion layer.
Optionally, the laser light incident surface of the transmission type wavelength conversion layer is plated with a 0-degree Bluepass film layer.
Optionally, the 0-degree Bluepass film layer allows the blue light with the incident angle smaller than 17 degrees to be transmitted, and the blue light with the incident angle larger than 17 degrees and the stimulated light are totally reflected.
Optionally, the exit surface of the transmissive wavelength conversion layer is plated with an antireflection film.
Optionally, any one of the fluorescent powder layers is a Ce: YAG transparent luminescent ceramic layer, a Ce: YAG and Al2O3Co-sintered composite luminescent ceramic layers or PIG phosphor layers.
Optionally, at least two phosphor layers are both Ce: YAG transparent luminescent ceramic layers or Ce: YAG and Al2O3And when the composite luminescent ceramic layers are sintered together, the thicknesses of the at least two fluorescent powder layers are different.
Optionally, when the at least two phosphor layers are PIG phosphor layers, the thicknesses of the at least two phosphor layers are different or the contents of Ce: YAG yellow phosphor in the at least two phosphor layers are different.
Optionally, the laser light source is located on a side of the first substrate away from the reflector, and the first substrate has a light-transmitting opening, wherein the laser light is incident to the transmission-type wavelength conversion layer through the light-transmitting opening.
Optionally, the light-transmitting opening is further covered with an antireflection film.
Optionally, the lighting device further comprises:
and the light condensing device is arranged on the light emitting path of the laser light source and is positioned between the laser light source and the wavelength conversion device.
Optionally, the reflecting surface is an arc reflecting surface.
Correspondingly, the invention also provides a vehicle headlamp device which comprises the lighting device.
Compared with the prior art, the technical scheme provided by the invention at least has the following advantages:
the invention provides a lighting device and a vehicle headlamp device, comprising: a laser light source for emitting laser light; the reflecting cover is arranged on the first substrate, a light outlet is formed between the reflecting cover and the first substrate, and one surface of the reflecting cover facing the first substrate is a reflecting surface; the laser device comprises a first substrate, a reflecting cover, a laser light source, a wavelength conversion device and a light source, wherein the first substrate is arranged on the first substrate, the wavelength conversion device is arranged between the first substrate and the reflecting cover, the laser light source is arranged on one side, away from the reflecting cover, of the wavelength conversion device, the wavelength conversion device comprises a plurality of transmission type wavelength conversion layers, the transmission type wavelength conversion layers are used for receiving the laser light, converting the laser light into a received laser light and emitting the received laser light to the reflecting surface, and the reflecting surface reflects the received laser light out of the light outlet in a set direction; and the control device is connected with the wavelength conversion device and is used for driving the wavelength conversion device to switch the corresponding transmission type wavelength conversion layer to receive the laser.
As can be seen from the above, according to the technical scheme provided by the present invention, after the illumination device irradiates the transmission-type wavelength conversion layer with the laser, the obtained received laser emits light in a predetermined direction, and the high brightness of the emitted light of the illumination device is ensured due to the high brightness of the laser light source; the lighting device has a simple structure, and the volume of each component formed by the lighting device is limited, so that the lighting device is ensured to be small; the semi-closed fixing mode of the reflecting cover and the first substrate ensures that the laser light is totally emitted, so that the waste of light is avoided; in addition, the control device controls the wavelength conversion device to switch different transmission type wavelength conversion layers to receive the laser, so that different light emitting effects of the lighting device are achieved, and the applicability and flexibility of the lighting device are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an illumination device according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another illumination device provided in the embodiment of the present application;
fig. 3 is a schematic structural diagram of a diaphragm provided in an embodiment of the present application;
FIG. 4a is a schematic structural diagram of another diaphragm provided in an embodiment of the present application;
FIG. 4b is a schematic view of light-emitting spots of the lighting device with the diaphragm shown in FIG. 4a when applied to a vehicle headlamp;
FIG. 4c is a schematic structural diagram of another diaphragm provided in the embodiment of the present application;
FIG. 4d is a schematic view of light-emitting spots of the lighting device with the diaphragm shown in FIG. 4c applied to a vehicle headlamp;
FIG. 5a is a schematic structural diagram of another diaphragm provided in the embodiment of the present application;
FIG. 5b is a schematic view of light-emitting spots of the lighting device with the diaphragm shown in FIG. 5a when applied to a vehicle headlamp;
FIG. 5c is a schematic structural diagram of another diaphragm provided in the embodiment of the present application;
FIG. 5d is a schematic view of light-emitting spots of the lighting device with the diaphragm shown in FIG. 5c applied to a vehicle headlamp;
fig. 5e is a schematic diagram of light emitting spots of a vehicle headlamp according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a wavelength conversion device according to an embodiment of the present disclosure;
FIG. 7 is a schematic diagram of a structure of a transmissive wavelength conversion layer provided in an embodiment of the present application;
fig. 8 is a schematic structural diagram of another lighting device provided in the embodiment of the present application;
fig. 9 is a schematic structural diagram of a vehicle headlamp apparatus according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As described in the background art, the conventional vehicle headlamp apparatus using the light emitting diodes as the light emitting source has a limited light emitting luminance, and if the light emitting luminance of the vehicle headlamp apparatus is to be increased again, the number of the light emitting diodes needs to be increased.
Based on this, the embodiment of the application provides a lighting device and a vehicle headlamp device, and the lighting device not only has high light brightness, but also has a simple structure and a small volume; in addition, the lighting device can receive laser by switching different transmission type wavelength conversion layers, so that different light emitting effects of the lighting device are realized, and the flexibility and the adaptability of the lighting device are improved. In order to achieve the above object, the technical solutions provided by the embodiments of the present application are described in detail below, specifically with reference to fig. 1 to 9.
Referring to fig. 1, a schematic structural diagram of an illumination device provided in an embodiment of the present application is shown, where the illumination device includes:
a laser light source 10 for emitting laser light;
the backlight module comprises a first substrate 20 and a reflector 30 arranged on the first substrate, wherein a light outlet 21 is formed between the reflector 30 and the first substrate 20, and one surface of the reflector 30 facing the first substrate 20 is a reflecting surface 31;
a wavelength conversion device 40 disposed on the first substrate 20 and located between the first substrate 20 and the reflector 30, wherein the laser light source 10 is disposed on a side of the wavelength conversion device 40 away from the reflector 30, the wavelength conversion device 40 includes a plurality of transmissive wavelength conversion layers 41, the transmissive wavelength conversion layers 41 are configured to receive the laser light, convert the laser light into a received laser light, and emit the received laser light to the reflection surface 31, and the reflection surface 31 reflects the received laser light out of the light outlet 21 in a predetermined direction;
and a control device 50 connected to the wavelength conversion device 40 for driving the wavelength conversion device 40 to switch the respective transmissive wavelength conversion layers 41 to receive the laser light.
As can be seen from the above, in the technical solution provided in the embodiment of the present application, after the illumination device irradiates the transmissive wavelength conversion layer with the laser light, the obtained received laser light is emitted in a predetermined direction, and since the brightness of the laser light source is high, the high brightness of the emitted light of the illumination device is ensured; the lighting device has a simple structure, and the volume of each component formed by the lighting device is limited, so that the lighting device is ensured to be small; the semi-closed fixing mode of the reflecting cover and the first substrate ensures that the laser light is totally emitted, so that the waste of light is avoided; in addition, the control device controls the wavelength conversion device to switch different transmission type wavelength conversion layers to receive the laser, so that different light emitting effects of the lighting device are achieved, and the applicability and flexibility of the lighting device are improved.
When the lighting device is applied to a headlamp device for a vehicle, light emitted by the lighting device is diversified, and the light can be light spots in various shapes and can also be light in various colors. Referring specifically to fig. 2, a schematic structural diagram of another illumination apparatus provided in the present embodiment is shown, wherein in the wavelength conversion device 40, a light shaping device 60 is further disposed on a side of the at least one transmissive wavelength conversion layer 41 facing the reflection surface 31;
the light shaping device 60 is used for converting the color and/or spot of the excited light.
The light shaping device is switched along with the corresponding transmission type wavelength conversion layer so as to ensure that the transmission type wavelength conversion layer receives the received laser light generated after the laser light is shaped by the corresponding light shaping device. Optionally, the light shaping device 60 provided in the embodiment of the present application may be a diaphragm, and the light-emitting spots of different shapes are realized by optimizing a diaphragm opening of the diaphragm; in addition, the material of the diaphragm may be a metal material, or may also be other materials, and this application is not specifically limited.
Specifically, when the lighting device is applied to a vehicle headlamp device, light of the vehicle headlamp needs to be adjusted to a flashing state when a vehicle turns or fails, wherein, referring to fig. 3, a schematic structural diagram of a diaphragm provided in the embodiment of the present application is shown, wherein a diaphragm opening of the diaphragm 60 is divided into a light-transmitting area 61 and a light-shielding area 62;
when the transmission type wavelength conversion layer corresponding to the diaphragm comprising the light-transmitting area and the light-shading area receives the laser, the control device also controls the wavelength conversion device to reciprocate at a preset time interval so that the laser irradiates the light-transmitting area and the light-shading area at the preset time interval; namely, the light emitting state of the lighting device is changed into the flickering state through the reciprocating switching of the light transmitting area and the light shielding area. Further, in practical applications, the transmission type wavelength conversion layer may be configured to receive laser light, which is generated after the transmission type wavelength conversion layer receives the laser light, as red light, so that a warning effect can be generated through a flashing state of the red light.
In addition, the light spot of the light emitted by the lighting device can be an L-shaped light spot, namely, when the vehicle runs on a bidirectional lane, the light spot of the light emitted by the lighting device can be adjusted to the L-shaped light spot, the part of the L-shaped light spot, which is close to the lane in the other direction, is in a low beam form, and the part of the L-shaped light spot, which is far away from the lane in the other direction, is in a high beam form, so that the condition that the light irradiates the eyes of a driver in the lane in the other direction is avoided on the premise. That is, referring to fig. 4a, which is a schematic structural diagram of another diaphragm provided in the embodiment of the present application, a diaphragm opening of the diaphragm 60 is an L-shaped diaphragm opening;
when the transmission type wavelength conversion layer corresponding to the diaphragm comprising the L-shaped diaphragm opening receives the laser, the corner opening of the L-shaped diaphragm opening faces the light outlet, and the extending direction of one side of the corner opening of the L-shaped diaphragm opening is parallel to the direction from the diaphragm to the light outlet.
It should be noted that the bending direction of the corner opening of the L-shaped diaphragm aperture is not specifically limited in the present application. When the lighting device comprises a diaphragm comprising an L-shaped diaphragm opening, and when a transmission type wavelength conversion layer corresponding to the diaphragm receives laser light, a corner opening of the L-shaped diaphragm opening faces to the light outlet, and the extending direction of one side of the corner opening of the L-shaped diaphragm opening is parallel to the direction from the diaphragm to the light outlet, the corner opening of the L-shaped diaphragm opening can be bent to face towards the left; or, when the lighting device includes a diaphragm including an L-shaped diaphragm aperture, and when the transmission type wavelength conversion layer corresponding to the diaphragm receives the laser light, the corner opening of the L-shaped diaphragm aperture faces the light exit aperture, and the extending direction of one side of the corner opening of the L-shaped diaphragm aperture is parallel to the direction from the diaphragm to the light exit aperture, the corner opening of the L-shaped diaphragm aperture may be bent toward the right side thereof; or, when the lighting device includes two diaphragms including L-shaped diaphragm apertures, on the basis that a corner opening of one diaphragm aperture faces the light exit aperture and an extending direction of one side of the corner opening of the L-shaped diaphragm aperture is parallel to a direction from the diaphragm to the light exit aperture when the transmission type wavelength conversion layer corresponding to the one diaphragm receives the laser light, the corner opening of the L-shaped diaphragm aperture of the one diaphragm aperture is bent toward the right thereof, and the corner opening of the L-shaped diaphragm aperture of the other diaphragm aperture is bent toward the left thereof.
Specifically, as shown in fig. 4a, when the transmission wavelength conversion layer corresponding to the stop 60 receives the laser, the corner opening of the L-shaped stop faces the light exit 21, and the extending direction of one side of the corner opening of the L-shaped stop is parallel to the direction X from the stop 60 to the light exit 21, and the corner opening of the L-shaped stop of the stop 60 is bent to the right; and, referring to fig. 4b, it is a schematic diagram of the light-emitting spots when the lighting device with the diaphragm shown in fig. 4a is applied to the vehicle headlamp, wherein, when the lighting device with the diaphragm shown in fig. 4a is applied to the vehicle headlamp, the light-emitting spots 61 are also L-shaped spots, and the corner openings of the L-shaped spots 61 are bent to the right side beyond the L-shaped spots, so that the flexibility of the vehicle headlamp is improved.
And, referring to fig. 4c, a schematic structural diagram of another diaphragm provided in the embodiment of the present application is shown, wherein, when the transmission wavelength conversion layer corresponding to the diaphragm 60 receives laser light, a corner opening of the L-shaped diaphragm opening faces the light exit opening 21, and an extending direction of one side of the corner opening of the L-shaped diaphragm opening is parallel to a direction X from the diaphragm 60 to the light exit opening 21, and the corner opening of the L-shaped diaphragm opening of the diaphragm 60 is bent to the left side thereof; and, referring to fig. 4d, it is a schematic diagram of the light-emitting spots when the lighting device with the diaphragm shown in fig. 4c is applied to the vehicle headlamp, wherein, when the lighting device with the diaphragm shown in fig. 4c is applied to the vehicle headlamp, the light-emitting spots 62 are also L-shaped spots, and the corner openings of the L-shaped spots 62 are bent to the left beyond the L-shaped spots, so that the flexibility of the vehicle headlamp is improved.
It should be noted that, the diaphragm including the L-shaped diaphragm aperture provided in the embodiment of the present application can enlarge the area of the bent portion of the L-shaped light spot emitted from the diaphragm by optimizing parameters such as the size of the L-shaped diaphragm aperture, thereby ensuring a large field of view for a driver and improving driving safety. As shown in fig. 5e, in the schematic view of the light-emitting spot of the vehicle headlamp according to the embodiment of the present application, the area of the bent portion of the L-shaped spot 65 is enlarged, so that the field of view of the driver is ensured to be large when the vehicle turns, and the driving safety is improved.
In addition, the diaphragm opening of the diaphragm provided by the embodiment of the application can also be a strip-shaped diaphragm opening;
when the transmission type wavelength conversion layer corresponding to the diaphragm comprising the strip diaphragm opening receives the laser, the extending direction of the strip diaphragm opening is vertical or parallel to the direction from the diaphragm to the light outlet.
That is, when the lighting device provided in the embodiment of the present application is applied to the vehicle headlamp device, the light output from the vehicle headlamp device can be brought into a low beam state by the shaping action of the diaphragm. Specifically, referring to fig. 5a, which is a schematic structural diagram of another diaphragm provided in this embodiment of the present application, a diaphragm aperture of the diaphragm 60 is a strip-shaped diaphragm aperture, and when the transmission wavelength conversion layer corresponding to the strip-shaped diaphragm aperture receives laser light, an extending direction of the strip-shaped diaphragm aperture is perpendicular to a direction X from the diaphragm 60 to the light exit 21. Meanwhile, referring to fig. 5b, there is a schematic diagram of light emitting spots when the lighting device with the diaphragm shown in fig. 5a is applied to a vehicle headlamp, wherein when the lighting device with the diaphragm shown in fig. 5a is applied to a vehicle headlamp, the light emitting light 63 is in a low beam state.
When the lighting device provided by the embodiment of the application is applied to the vehicle headlamp device, the light emitted by the vehicle headlamp device can be in a high beam state through the shaping effect of the diaphragm. Specifically, referring to fig. 5c, which is a schematic structural diagram of another diaphragm provided in this embodiment of the present application, a diaphragm aperture of the diaphragm 60 is a strip-shaped diaphragm aperture, and when the transmission wavelength conversion layer corresponding to the strip-shaped diaphragm aperture receives laser light, an extending direction of the strip-shaped diaphragm aperture is parallel to a direction X from the diaphragm 60 to the light exit 21. Meanwhile, referring to fig. 5d, a schematic diagram of light-emitting spots when the lighting device with the diaphragm shown in fig. 5c is applied to the vehicle headlamp is shown, wherein when the lighting device with the diaphragm shown in fig. 5c is applied to the vehicle headlamp, the light-emitting spot 64 is in a high beam state.
Furthermore, the diaphragm opening of the diaphragm of the lighting device is covered with an optical filter. Namely, the light-emitting color of the lighting device is changed through the optical filter, so that the applicability and the flexibility of the lighting device are further improved; when the laser light is white light, the optical filter can be a red optical filter, other color light is filtered through the optical filter and red light passes through the optical filter, so that the light emitted by the lighting device is red light which serves as a warning lamp to play a warning role; in addition, the optical filter may also be an optical filter of other color lights, and the present application is not particularly limited, and needs to be specifically designed according to practical applications.
In the lighting device provided by the present application, all the transmissive wavelength converting layers are disposed end to end in a circular ring, and specifically, as shown in fig. 6, a structural schematic diagram of a wavelength converting device provided by an embodiment of the present application is shown, where the wavelength converting device 40 includes a plurality of transmissive wavelength converting layers 41, and all the transmissive wavelength converting layers 41 are disposed end to end in a circular ring.
Further, referring to fig. 7, in order to improve the light emitting effect of the illumination device, a 0 degree Bluepass film layer 41a may be plated on the laser incident surface of the transmissive wavelength conversion layer 41. Further, the blue pass film layer with the angle of incidence of less than 17 degrees allows the blue light to be transmitted, and the blue light with the angle of incidence of more than 17 degrees and the stimulated light are totally reflected.
The 0-degree Bluepass film layer reduces the loss of the laser and the laser, ensures that as much laser and laser as possible are emitted from the emitting surface of the transmission type wavelength conversion layer, further improves the utilization rate of light and improves the brightness of the lighting device.
Further, referring to fig. 7, the exit surface of the transmissive wavelength converting layer 41 is coated with an antireflection film 41b to improve the light transmission effect.
The control device provided by the embodiment of the application can comprise a rotating shaft, a motor, a shifting controller and the like, the rotating shaft and the center of the wavelength conversion device are fixed, then the shifting controller sends a control signal to control the motor to rotate, the wavelength conversion device is further driven to rotate, different transmission type wavelength conversion layers are switched to receive laser, shaping is carried out through corresponding light shaping devices of the different transmission type wavelength conversion layers, and the flexibility and the adaptability of the illumination device are improved. The shift controller provided in the embodiment of the present application may be a rotary shift controller or another type of shift controller, and the embodiment of the present application is not particularly limited.
Further, the transmission-type wavelength conversion layer provided in the embodiments of the present application is a phosphor layer, that is, a received laser is generated by irradiating the phosphor layer to serve as an outgoing light source of the lighting device. The wavelength conversion device provided by the embodiment of the application can be manufactured into a fluorescent powder sheet structure, and then the fluorescent body is divided into a plurality of areas which respectively correspond to a transparent fluorescent powder layer; in addition, the wavelength conversion device provided in the embodiment of the present application may further include a transparent substrate, and the transparent substrate is used as a carrier substrate to form a plurality of phosphor layers thereon, which is not particularly limited in this application and needs to be specifically selected according to actual needs.
Specifically, any one of the phosphor layers provided in the embodiments of the present application is a Ce: YAG (cerium-doped YAG) transparent luminescent ceramic layer, Ce: YAG, and Al2O3A co-sintered composite luminescent ceramic layer or a PIG (phosphor in glass) phosphor layer; the PIG fluorescent layer is formed by sintering Ce, YAG yellow fluorescent powder and glass powder. The fluorescent powder layers made of the three materials are processed to obtain the actually required thickness, size and shape.
Selecting Ce: YAG (cerium doped Y)AG) transparent luminescent ceramic layer, Ce: YAG and Al2O3The co-sintered composite luminescent ceramic layer or pig (phosphor in glass) phosphor layer has the advantage that the surface for coating can be obtained by processing the phosphor layer. The method is used for plating a 0-degree Bluepass film layer on the laser light incident surface of the transmission type wavelength conversion layer and plating an antireflection film on the emergent surface of the transmission type wavelength conversion layer.
In addition, the laser light source provided by the embodiment of the application can be blue laser, and the fluorescent powder layer made of the three materials can be excited by the blue laser to generate light with a preset color. Optionally, in the wavelength conversion device provided in this embodiment of the present application, at least two phosphor layers are both Ce: YAG transparent luminescent ceramic layers or Ce: YAG and Al2O3And when the composite luminescent ceramic layers are sintered together, the thicknesses of the at least two fluorescent powder layers are different. When the thickness of the fluorescent powder layer is thin, one part of the blue laser is used for exciting the fluorescent powder layer to be converted into yellow excited laser, the other part of the blue laser directly penetrates through the fluorescent powder layer, and the yellow excited light and the blue laser are mixed into white light; therefore, according to the principle and characteristics, when the fluorescent powder layer is a Ce: YAG transparent luminescent ceramic layer or Ce: YAG and Al2O3When the composite luminescent ceramic layers are sintered together, in order to realize different light-emitting color temperatures of the lighting device, the aim of adjusting different color temperatures of white light can be fulfilled by adjusting the thickness of the fluorescent powder layer.
In addition, when the fluorescent powder layer is a PIG fluorescent layer, the aim of adjusting the color temperature of the emergent light can be fulfilled by adjusting the thickness of the fluorescent powder layer, and the color temperature of the emergent light can be adjusted by adjusting the content of Ce, namely YAG yellow fluorescent powder in the PIG fluorescent layer; that is, when the at least two phosphor layers are both PIG phosphor layers, the thicknesses of the at least two phosphor layers are different or the contents of the Ce: YAG yellow phosphor in the at least two phosphor layers are different.
In any of the above embodiments, the laser of the laser light source provided by the present application may be a high power threshold laser, and may also be a semiconductor laser. In addition, the laser light source provided by the embodiment of the application can be positioned between the first substrate and the wavelength conversion device; in addition, referring to fig. 8, for a schematic structural diagram of another lighting device provided in the embodiment of the present application, the laser light source 10 provided in the embodiment of the present application may be further located on a side of the first substrate 20 away from the reflector 30, and the first substrate 20 has a light-transmitting opening 22, where the laser light is incident to the transmission-type wavelength conversion layer 41 through the light-transmitting opening 22. Wherein, the light-transmitting opening can be filled with a sapphire structure.
Further, in order to improve the effect of the lighting device, the light-transmitting opening provided in the embodiment of the present application is further covered with an antireflection film.
And, further, as shown with reference to fig. 8, the lighting device further includes:
and the light condensing device 70 is arranged on the light outgoing path of the laser light source 10 and is positioned between the laser light source 10 and the wavelength conversion device 40. Optionally, in order to match the 0-degree Bluepass film layer plated on the laser incident surface of the transmission-type wavelength conversion layer, the incident angle of the incident laser needs to be adjusted to be as smaller than 17 degrees as possible. The light condensing device 70 may be used to adjust the incident angle of the incident laser light.
In order to optimize the reflecting surface of the reflecting cover, the reflecting surface provided by the embodiment of the application can be an arc surface reflecting surface, a parabolic curved surface design is adopted, the light loss can be effectively reduced, and the angle of the reflecting surface reflecting the received laser and the spatial structure of the reflecting surface can be simulated through computer modeling to determine the design parameters of the reflecting surface; the reflection cover provided by the present application may be made of a material such as resin, glass, metal, or alloy, and the reflection surface may be formed by depositing a highly reflective aluminum film or silver film on the surface thereof.
Correspondingly, the embodiment of the application also provides a vehicle headlamp device which comprises the lighting device.
Specifically, referring to fig. 9, a schematic structural diagram of a vehicular headlamp apparatus according to an embodiment of the present disclosure is provided, wherein the wavelength conversion device of the vehicular headlamp apparatus may include five transmissive wavelength conversion layers, and a light shaping device is disposed on a side of each of the transmissive wavelength conversion layers facing the reflection surface. Among them, five light shaping devices (60a, 60b, 60c, 60d and 60e) may be the light shaping devices shown in fig. 3, fig. 4a, fig. 4c, fig. 5a and fig. 5c, respectively. When a driver drives a vehicle, the driver can send a switching command in a gear shifting mode according to the current driving requirement, then the control device of the vehicle headlamp device receives the command to control the corresponding transmission type wavelength conversion layer to receive laser, and the generated excitation light penetrates through the corresponding light shaping device and then irradiates the reflection surface to emit light so as to meet the requirement of the driver.
Compared with the prior art, the technical scheme provided by the embodiment of the application has at least the following advantages:
the embodiment of the application provides a lighting device and for vehicle headlamp device, includes: a laser light source for emitting laser light; the reflecting cover is arranged on the first substrate, a light outlet is formed between the reflecting cover and the first substrate, and one surface of the reflecting cover facing the first substrate is a reflecting surface; the laser device comprises a first substrate, a reflecting cover, a laser light source, a wavelength conversion device and a light source, wherein the first substrate is arranged on the first substrate, the wavelength conversion device is arranged between the first substrate and the reflecting cover, the laser light source is arranged on one side, away from the reflecting cover, of the wavelength conversion device, the wavelength conversion device comprises a plurality of transmission type wavelength conversion layers, the transmission type wavelength conversion layers are used for receiving the laser light, converting the laser light into a received laser light and emitting the received laser light to the reflecting surface, and the reflecting surface reflects the received laser light out of the light outlet in a set direction; and the control device is connected with the wavelength conversion device and is used for driving the wavelength conversion device to switch the corresponding transmission type wavelength conversion layer to receive the laser.
As can be seen from the above, in the technical solution provided in the embodiment of the present application, after the illumination device irradiates the transmissive wavelength conversion layer with the laser light, the obtained received laser light is emitted in a predetermined direction, and since the brightness of the laser light source is high, the high brightness of the emitted light of the illumination device is ensured; the lighting device has a simple structure, and the volume of each component formed by the lighting device is limited, so that the lighting device is ensured to be small; the semi-closed fixing mode of the reflecting cover and the first substrate ensures that the laser light is totally emitted, so that the waste of light is avoided; in addition, the control device controls the wavelength conversion device to switch different transmission type wavelength conversion layers to receive the laser, so that different light emitting effects of the lighting device are achieved, and the applicability and flexibility of the lighting device are improved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (18)

1. An illumination device, comprising:
a laser light source for emitting laser light;
the reflecting cover is arranged on the first substrate, a light outlet is formed between the reflecting cover and the first substrate, and one surface of the reflecting cover facing the first substrate is a reflecting surface;
the wavelength conversion device is arranged on the first substrate and positioned between the first substrate and the reflecting cover, the laser light source is arranged on one side of the wavelength conversion device, which is far away from the reflecting cover, the wavelength conversion device comprises a plurality of transmission type wavelength conversion layers, the transmission type wavelength conversion layers are used for receiving the laser light, converting the laser light into a received laser light and emitting the received laser light to the reflecting surface, and the reflecting surface reflects the received laser light out of the light outlet in a given direction;
and a control device connected with the wavelength conversion device and used for driving the wavelength conversion device to switch the corresponding transmission type wavelength conversion layer to receive the laser;
in the wavelength conversion device, a light shaping device is arranged on one side of each transmission type wavelength conversion layer facing the reflection surface, and the light shaping device is a diaphragm and is used for converting the shape of the light spot of the received laser light so as to realize the light-emitting light spots in different shapes.
2. The illumination device according to claim 1, wherein a diaphragm opening of the diaphragm is divided into a light-transmitting area and a light-blocking area;
when the transmission type wavelength conversion layer corresponding to the diaphragm comprising the light transmitting area and the light shading area receives the laser, the control device also controls the wavelength conversion device to reciprocate at a preset time interval, so that the laser irradiates the light transmitting area and the light shading area at the preset time interval.
3. The illumination device according to claim 1, wherein the diaphragm opening of the diaphragm is an L-shaped diaphragm opening;
when the transmission type wavelength conversion layer corresponding to the diaphragm comprising the L-shaped diaphragm opening receives the laser, the corner opening of the L-shaped diaphragm opening faces the light outlet, and the extending direction of one side of the corner opening of the L-shaped diaphragm opening is parallel to the direction from the diaphragm to the light outlet.
4. The illumination device according to claim 1, wherein the diaphragm opening of the diaphragm is a strip-shaped diaphragm opening;
when the transmission type wavelength conversion layer corresponding to the diaphragm comprising the strip diaphragm opening receives the laser, the extending direction of the strip diaphragm opening is vertical or parallel to the direction from the diaphragm to the light outlet.
5. The illumination device as claimed in claim 1, wherein the aperture of the aperture is further covered with a filter.
6. The illumination device of claim 1 wherein all of the transmissive wavelength converting layers are disposed end to end in a circular ring.
7. The illumination device of claim 1, wherein the transmissive wavelength-converting layer is a phosphor layer transmissive wavelength-converting layer.
8. The illumination device as claimed in claim 1, wherein the transmission type wavelength conversion layer laser light entrance surface is coated with a 0 degree Bluepass film layer.
9. The illumination device of claim 8, wherein the 0 degree Bluepass film layer allows blue light transmission at an angle of incidence less than 17 degrees, and blue light at an angle of incidence greater than 17 degrees and the stimulated light are all reflected.
10. The illumination device of claim 1, wherein the exit surface of the transmissive wavelength converting layer is coated with an anti-reflective coating.
11. The lighting device according to claim 7, wherein any one of the phosphor layers is a Ce: YAG transparent luminescent ceramic layer, a Ce: YAG and Al2O3Co-sintered composite luminescent ceramic layers or PIG phosphor layers.
12. The lighting device of claim 11, wherein at least two phosphor layers are both Ce: YAG transparent luminescent ceramic layers or Ce: YAG and Al2O3And when the composite luminescent ceramic layers are sintered together, the thicknesses of the at least two fluorescent powder layers are different.
13. The lighting device of claim 11, wherein when at least two phosphor layers are both PIG phosphor layers, the at least two phosphor layers have different thicknesses or different contents of Ce: YAG yellow phosphor in the at least two phosphor layers.
14. The illumination device as claimed in claim 1, wherein the laser light source is located on a side of the first substrate facing away from the reflector, and the first substrate has a light-transmitting opening, wherein the laser light is incident on the transmissive wavelength conversion layer through the light-transmitting opening.
15. A lighting device as recited in claim 14, wherein said light-transmissive opening is further covered with an anti-reflective coating.
16. A lighting device as recited in claim 1, further comprising:
and the light condensing device is arranged on the light emitting path of the laser light source and is positioned between the laser light source and the wavelength conversion device.
17. A lighting device as recited in claim 1, wherein said reflective surface is a curved reflective surface.
18. A vehicle headlamp apparatus characterized by comprising the lighting device recited in any one of claims 1 to 17.
CN201610250232.1A 2016-04-20 2016-04-20 Lighting device and vehicle headlamp device Active CN107304998B (en)

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