WO2010020930A1 - Compact multiple beam type vehicle light system - Google Patents

Compact multiple beam type vehicle light system Download PDF

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Publication number
WO2010020930A1
WO2010020930A1 PCT/IB2009/053607 IB2009053607W WO2010020930A1 WO 2010020930 A1 WO2010020930 A1 WO 2010020930A1 IB 2009053607 W IB2009053607 W IB 2009053607W WO 2010020930 A1 WO2010020930 A1 WO 2010020930A1
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WO
WIPO (PCT)
Prior art keywords
light
vehicle
laser beam
output module
light output
Prior art date
Application number
PCT/IB2009/053607
Other languages
French (fr)
Inventor
Rifat A. M. Hikmet
Ties Van Bommel
Original Assignee
Koninklijke Philips Electronics N.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Priority to EP09786949A priority Critical patent/EP2318752B1/en
Priority to CN2009801325506A priority patent/CN102132085B/en
Priority to US13/059,300 priority patent/US8256941B2/en
Priority to AT09786949T priority patent/ATE545827T1/en
Priority to JP2011523472A priority patent/JP5529132B2/en
Priority to KR1020117006411A priority patent/KR101660969B1/en
Publication of WO2010020930A1 publication Critical patent/WO2010020930A1/en

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Classifications

    • 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
    • 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
    • F21S41/63—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates
    • F21S41/64—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices
    • F21S41/645—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices by electro-optic means, e.g. liquid crystal or electrochromic devices
    • 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
    • F21S41/12—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of emitted light
    • 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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/30—Semiconductor lasers

Definitions

  • the invention relates to a vehicle light system.
  • car light systems are provided with a low-beam and a high-beam option. Furthermore, some light systems are provided with a pair of fog lights so as to cope with adverse driving conditions in fog.
  • AFS adaptive front light systems
  • exterior lighting such as day, dawn, public lighting, night
  • traffic environment such as motorways with separate carriageways
  • winding country roads such as dry, wet, rainy, snowy, foggy
  • vehicle attitudes such as inclination changes by load, dynamic inclination changes while driving, degree of control, speed of vehicle, and ground clearance.
  • AFS systems comprising multiple LEDs have been described. Due to the presence of multiple light source elements, these multiple LED systems require much space. In addition, a complex heat sink structure is needed for cooling the light source elements. As a result, the cooling performance is poor.
  • a vehicle light system comprising a laser device for generating a laser beam, further comprising a light output module provided with a phosphor element for emitting a light beam upon incidence of the generated laser beam and provided with an optical element associated with the phosphor element for producing a light output beam, wherein the light system further comprises a further light output module provided with a corresponding further phosphor element and a further optical element, and wherein the laser device is arranged to switch between a first state, in which the generated laser beam is directed to the phosphor element, and a second state in which the generated laser beam is directed to the further phosphor element.
  • the light system can be provided with a single laser device while different output beam types can be generated.
  • a light source can be implemented in a compact way. Furthermore, an efficient cooling can be realized.
  • the laser device comprises an optical switch for changing the direction and/or position of the laser beam.
  • the direction and/or position of the generated laser beam can be altered in a reliable, accurate manner without using moving parts, thereby obtaining a reduced cost price and an improved performance of the vehicle light system.
  • Optical elements without moving parts such as liquid crystal elements, electrowetting elements and/or electrophoretic cells can be used for this purpose.
  • the direction and/or position of the beam can be changed, e.g. by providing the system with a mechanical actuator for changing the direction and/or position of the laser beam, e.g. by tilting the laser device.
  • the vehicle light system comprises a plurality of light output modules provided with a phosphor element for emitting a light beam upon incidence of the generated laser beam and provided with an optical element associated with the phosphor element for producing a light output beam, wherein the laser device is arranged to switch the direction and/or position of the generated laser beam towards a phosphor element of a selected light output module.
  • a single laser device can be provided in combination with three or four light output modules, so that three or four light output beam types , respectively, can be produced.
  • the vehicle light system can also be provided with another configuration of laser devices and corresponding light output modules, e.g. two laser devices and four light output modules.
  • the light system can be advantageously realized in a very compact way by providing a single laser device.
  • the phosphor element of an output module is arranged to emit a yellow-orange broadband light beam upon incidence of a blue light laser beam which leads to white light when incident laser light is partially converted to yellow light.
  • a violet laser beam or a laser beam emitting at shorter wavelengths such as UV light is used, a white emitting phosphor is used for producing white light.
  • the phosphor element of an output module is arranged to emit red, green and blue light upon incidence of a blue, violet or UV laser beam.
  • the output beam shape and/or direction of the optical element provided with a first light output module differs from the output beam shape and/or direction, respectively, of the optical element provided with a second light output module.
  • the output beam shape and/or direction may substantially coincide, e.g. for providing a spare light output module which can be used if a primary light output module does not function properly, e.g. due to mechanical damage.
  • a car driver can control the vehicle light system by connecting it to an automotive control system. It is noted that the vehicle light system may not only be used in a car, but also in other vehicles, such as a motor bikes, trucks, trains or ships.
  • a method of controlling a vehicle light system comprises the steps of: switching a laser device between a first state, in which a laser beam generated by the laser device is directed to a phosphor element provided in a first light output module, and a second state, in which the generated laser beam is directed to the phosphor element provided in a second light output module, the phosphor elements being arranged to emit a light beam upon incidence of the generated laser beam, and the light output modules being further provided with an optical element for producing a light output beam.
  • Fig. Ia is a schematic view of a first embodiment of a vehicle light system according to the invention in a first state
  • Fig. Ib is a schematic view of the vehicle light system of Fig. Ia in a second state
  • Fig. Ic is a schematic view of the vehicle light system of Fig. Ia in a third state
  • Fig. 2a is a schematic top view of a car provided with the vehicle light system of Fig Ia in the first state
  • Fig. 2b is a schematic top view of a car provided with the vehicle light system of Fig Ia in the second state;
  • Fig. 2c is a schematic top view of a car provided with the vehicle light system of Fig Ia in the third state;
  • Fig. 3a is a schematic view of a second embodiment of a vehicle light system according to the invention in a first state
  • Fig. 3b is a schematic view of the vehicle light system of Fig. 3a in a second state
  • Fig. 3c is a schematic view of the vehicle light system of Fig. 3a in a third state
  • Fig. 4 shows diagrammatically an illumination system for a vehicle.
  • the Figures are merely intended to illustrate implementations and embodiments of the invention. In these Figures, the same reference numerals refer to equal or corresponding parts.
  • FIG. Ia is a schematic view of a first embodiment of a vehicle light system 1 according to the invention.
  • the system 1 comprises a laser device 2 for generating a laser beam 3.
  • the laser device 2 comprises a laser source 4 and an optical switch 5 for changing the direction and/or position of the laser beam 3.
  • the system further comprises three light output modules 6a-c, each provided with a phosphor element 7a-c for emitting a light beam 8a-c upon incidence of the generated laser beam.
  • each light output module 6a-c is provided with an optical element 9a-c associated with the corresponding phosphor element 7a-c for producing a specific light output beam 8a-c.
  • the laser beam 3 of the laser device 2 is directed to the phosphor element 7a of a first light output module 6a.
  • the laser light is used to pump the phosphor element which has a desired emission characteristic.
  • the combination of the laser source 4 and the phosphor element 7a constitutes a light source for automotive lighting.
  • the laser beam 3 of the laser device 2 is directed to the phosphor element 7b; 7c of a second and a third light output module 6b; 6c, respectively.
  • the laser device 2 is arranged to switch between the above-mentioned states.
  • the optical switch 5 controls the change of direction and/or position of the generated laser beam 3.
  • the optical switch 5 is controlled by an automotive control system.
  • a driver may specify a desired output beam type, such as shape and/or direction, e.g. by interacting with a user interface, so that the control system will set the associated state of the laser device 2.
  • Figures la-c show, by way of example, a vehicle light system addressing three light output modules providing three different light distributions and/or directions.
  • the laser device can address many more light output modules.
  • the light output modules are arranged in a two-dimensional array, e.g. in a 3 x 3 array.
  • FIG 2a is a schematic top view of a car 10 provided with the vehicle light system 1. More specifically, two vehicle light systems 1 are assembled, viz. one system in front of the car at the left and one system in front of the car at the right.
  • the car 10 is driving in a lane 11 on a motorway 12.
  • the laser device 2 is in the first state, corresponding to the situation as shown in Figure Ia.
  • the optical element 9a of the first light output module 6a has been formed in such a way that an elongated beam shape 8a is realized substantially parallel to the driving direction D of the car 10.
  • the elongated beam shape 13a has been optimized for typical motorway situations.
  • Figure 2b is a schematic top view of the same car 10, but on a lane 11 in a cross-country environment 13.
  • the laser device 2 has been switched to the second state, corresponding to the situation as shown in Figure Ib.
  • the optical element 9b of the second output module 6b has such a geometry that a broader beam shape 8b is produced, optimized for cross-country situations.
  • Figure 2c shows the car in a city 14, in which the laser device 2 has been switched to the third state, corresponding to the situation as shown in Figure Ic.
  • the beam shape 8c is even broader and illuminates a broader field of interest for the driver.
  • the front of the car 10 is provided with two vehicle light systems according to the invention.
  • more than two vehicle light systems e.g. three, four or more vehicle light systems according to the invention can be assembled to the vehicle, e.g. in order to obtain an enhanced light intensity and/or a more complicated beam shape on the road.
  • FIGS 3a, 3b and 3c are schematic views of a second embodiment of a vehicle light system 1 according to the invention in a first, a second and a third state, respectively.
  • the first state the light output beam is directed in line with the generated laser light beam.
  • the second state the light output beam is directed to the right, when viewed in the direction of propagation L, while in the third state, the light output beam is directed to the left, also when viewed in the direction of propagation L.
  • the output light can be advantageously directed into a driving direction when the vehicle is making a turn.
  • FIG. 4 shows diagrammatically an illumination system 20 for a vehicle.
  • the illumination system 20 comprises a control system 21 connected to a plurality of vehicle light systems Ia, Ib as described above, viz. two vehicle light systems Ia, Ib in the embodiment shown. These systems are arranged on a front side of a vehicle 10 but are not limited to this side.
  • the illumination system 20 comprises one or a plurality of sensors 22a, 22b.
  • the sensors 22 are arranged to measure one or more conditions, such as weather parameters, lighting conditions, vehicle orientation parameters, global position parameters (e.g.
  • the control system 21 is arranged to apply control signals to the vehicle light systems Ia, Ib for controlling the light output of the vehicle light systems Ia, Ib, e.g. by switching the light systems on/off and/or by controlling the optical switch 5 to modify a beam shape 8, depending on one or more parameters measured by the sensors 22.
  • the illumination system 20 may also comprise a different number of vehicle light systems Ia, Ib, e.g. one or more than two, e.g. four vehicle light systems.
  • the light system can also be assembled to the rear of a vehicle. Whilst specific embodiments of the invention have been described hereinbefore, it will be appreciated that the invention may be practiced in ways other than those described. The description is not intended to limit the invention. Any reference signs in the claims shall not be construed as limiting the scope.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Semiconductor Lasers (AREA)

Abstract

The invention relates to a vehicle light system (1) comprising a laser device (2) for generating a laser beam (3), further comprising a light output module (6) provided with a phosphor element (7) for emitting a light beam (8) upon incidence of the generated laser beam and provided with an optical element (9) associated with the phosphor element (7) for producing a light output beam. Furthermore, the light system comprises a further light output module provided with a corresponding further phosphor element and a second optical element. The laser device is arranged to switch between a first state, in which the generated laser beam is directed to the phosphor element, and a second state in which the generated laser beam is directed to the further phosphor element.

Description

Compact multiple beam type vehicle light system
FIELD OF THE INVENTION
The invention relates to a vehicle light system.
BACKGROUND OF THE INVENTION Currently, car light systems are provided with a low-beam and a high-beam option. Furthermore, some light systems are provided with a pair of fog lights so as to cope with adverse driving conditions in fog.
American patent publication US 2005/0041433 discloses a laser device for generating a laser beam which, upon incidence on a phosphor structure, produces a light beam which is collimated to a desired optical output beam by means of an optical element.
There is a need for different beam types depending on environmental conditions. As an example, special lights would be applied during the daytime and when driving in areas with public lighting. In urban areas, with their many crossings, the actual asymmetric main beam is counter-productive, particularly because additional glare is produced during acceleration after stops. Driving on motorways at a relatively high speed, with oncoming traffic traveling on a separate carriageway, requires other lighting functions. Adverse weather conditions have another impact, due to road reflection, resulting in reduced luminosity and higher (reflected) glare. In snowy, rainy or foggy weather, the emitted light is absorbed and scattered by snowflakes or water droplets so that vision is veiled by the reflected light, thereby resulting in a shorter visual range. Therefore, legislation is being formulated in order to introduce adaptive front light systems (AFS) which adapt the shape of the beam of headlights depending on exterior lighting, such as day, dawn, public lighting, night, traffic environment, such as motorways with separate carriageways, winding country roads, town and city streets, weather conditions, such as dry, wet, rainy, snowy, foggy, and/or vehicle attitudes, such as inclination changes by load, dynamic inclination changes while driving, degree of control, speed of vehicle, and ground clearance.
Mechanical AFS systems have been suggested for producing various beam shape types. As an example, International patent publication WO 2008/035267 discloses a vehicle lamp comprising a laser device and a reflector which is provided with a movable beam limiter. However, though functionality might be satisfactory, there is a need to provide light systems without moving parts, e.g. due to cost price, compactness, reliability, durability and repairability requirements.
Furthermore, AFS systems comprising multiple LEDs have been described. Due to the presence of multiple light source elements, these multiple LED systems require much space. In addition, a complex heat sink structure is needed for cooling the light source elements. As a result, the cooling performance is poor.
OBJECT AND SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a compact vehicle light system which is arranged to produce multiple output beam types.
According to a first aspect of the invention, a vehicle light system is provided, comprising a laser device for generating a laser beam, further comprising a light output module provided with a phosphor element for emitting a light beam upon incidence of the generated laser beam and provided with an optical element associated with the phosphor element for producing a light output beam, wherein the light system further comprises a further light output module provided with a corresponding further phosphor element and a further optical element, and wherein the laser device is arranged to switch between a first state, in which the generated laser beam is directed to the phosphor element, and a second state in which the generated laser beam is directed to the further phosphor element.
By arranging the laser device in such a way that the generated laser beam can switch from the phosphor element of the light output module to the phosphor element of the further light output module, the light system can be provided with a single laser device while different output beam types can be generated. As a result, a light source can be implemented in a compact way. Furthermore, an efficient cooling can be realized.
In one embodiment, the laser device comprises an optical switch for changing the direction and/or position of the laser beam. By providing the optical switch, the direction and/or position of the generated laser beam can be altered in a reliable, accurate manner without using moving parts, thereby obtaining a reduced cost price and an improved performance of the vehicle light system. Optical elements without moving parts such as liquid crystal elements, electrowetting elements and/or electrophoretic cells can be used for this purpose. It is noted that the direction and/or position of the beam can be changed, e.g. by providing the system with a mechanical actuator for changing the direction and/or position of the laser beam, e.g. by tilting the laser device. In a further embodiment, the vehicle light system comprises a plurality of light output modules provided with a phosphor element for emitting a light beam upon incidence of the generated laser beam and provided with an optical element associated with the phosphor element for producing a light output beam, wherein the laser device is arranged to switch the direction and/or position of the generated laser beam towards a phosphor element of a selected light output module. As an example, a single laser device can be provided in combination with three or four light output modules, so that three or four light output beam types , respectively, can be produced. In principle, the vehicle light system can also be provided with another configuration of laser devices and corresponding light output modules, e.g. two laser devices and four light output modules. However, the light system can be advantageously realized in a very compact way by providing a single laser device.
In a specific practical embodiment, the phosphor element of an output module is arranged to emit a yellow-orange broadband light beam upon incidence of a blue light laser beam which leads to white light when incident laser light is partially converted to yellow light. When a violet laser beam or a laser beam emitting at shorter wavelengths such as UV light is used, a white emitting phosphor is used for producing white light. However, also other practical embodiments are possible, e.g. a specific embodiment, wherein the phosphor element of an output module is arranged to emit red, green and blue light upon incidence of a blue, violet or UV laser beam. In various embodiments, the output beam shape and/or direction of the optical element provided with a first light output module differs from the output beam shape and/or direction, respectively, of the optical element provided with a second light output module. In theory, the output beam shape and/or direction may substantially coincide, e.g. for providing a spare light output module which can be used if a primary light output module does not function properly, e.g. due to mechanical damage.
A car driver can control the vehicle light system by connecting it to an automotive control system. It is noted that the vehicle light system may not only be used in a car, but also in other vehicles, such as a motor bikes, trucks, trains or ships.
According to a second aspect of the present invention, a method of controlling a vehicle light system is provided, which method comprises the steps of: switching a laser device between a first state, in which a laser beam generated by the laser device is directed to a phosphor element provided in a first light output module, and a second state, in which the generated laser beam is directed to the phosphor element provided in a second light output module, the phosphor elements being arranged to emit a light beam upon incidence of the generated laser beam, and the light output modules being further provided with an optical element for producing a light output beam.
It will be appreciated by those skilled in the art that two or more of the above- mentioned embodiments, implementations, and/or aspects of the invention may be combined in any way deemed useful.
Modifications and variations of the method, which correspond to the described modifications and variations of the vehicle light system, can be carried out by a person skilled in the art on the basis of the present description.
BRIEF DESCRIPTION OF THE DRAWINGS
In order that the invention may be more fully understood, embodiments thereof will now be described by way of example only, with reference to the drawings, in which:
Fig. Ia is a schematic view of a first embodiment of a vehicle light system according to the invention in a first state;
Fig. Ib is a schematic view of the vehicle light system of Fig. Ia in a second state;
Fig. Ic is a schematic view of the vehicle light system of Fig. Ia in a third state; Fig. 2a is a schematic top view of a car provided with the vehicle light system of Fig Ia in the first state;
Fig. 2b is a schematic top view of a car provided with the vehicle light system of Fig Ia in the second state;
Fig. 2c is a schematic top view of a car provided with the vehicle light system of Fig Ia in the third state;
Fig. 3a is a schematic view of a second embodiment of a vehicle light system according to the invention in a first state;
Fig. 3b is a schematic view of the vehicle light system of Fig. 3a in a second state; Fig. 3c is a schematic view of the vehicle light system of Fig. 3a in a third state; and
Fig. 4 shows diagrammatically an illumination system for a vehicle. The Figures are merely intended to illustrate implementations and embodiments of the invention. In these Figures, the same reference numerals refer to equal or corresponding parts.
DESCRIPTION OF EMBODIMENTS
Figure Ia is a schematic view of a first embodiment of a vehicle light system 1 according to the invention. The system 1 comprises a laser device 2 for generating a laser beam 3. The laser device 2 comprises a laser source 4 and an optical switch 5 for changing the direction and/or position of the laser beam 3. The system further comprises three light output modules 6a-c, each provided with a phosphor element 7a-c for emitting a light beam 8a-c upon incidence of the generated laser beam. Furthermore, each light output module 6a-c is provided with an optical element 9a-c associated with the corresponding phosphor element 7a-c for producing a specific light output beam 8a-c.
In a first state, shown in Figure Ia, the laser beam 3 of the laser device 2 is directed to the phosphor element 7a of a first light output module 6a. The laser light is used to pump the phosphor element which has a desired emission characteristic. The combination of the laser source 4 and the phosphor element 7a constitutes a light source for automotive lighting. In a second and a third state, shown in Figures Ib and Ic, respectively, the laser beam 3 of the laser device 2 is directed to the phosphor element 7b; 7c of a second and a third light output module 6b; 6c, respectively.
According to an aspect of the invention, the laser device 2 is arranged to switch between the above-mentioned states. The optical switch 5 controls the change of direction and/or position of the generated laser beam 3. To this end, the optical switch 5 is controlled by an automotive control system. During operation, a driver may specify a desired output beam type, such as shape and/or direction, e.g. by interacting with a user interface, so that the control system will set the associated state of the laser device 2. Figures la-c show, by way of example, a vehicle light system addressing three light output modules providing three different light distributions and/or directions. However, in principle, the laser device can address many more light output modules. Optionally, the light output modules are arranged in a two-dimensional array, e.g. in a 3 x 3 array.
Multiple light output modules can be used for generating various beam shapes on the road near the vehicle. Figure 2a is a schematic top view of a car 10 provided with the vehicle light system 1. More specifically, two vehicle light systems 1 are assembled, viz. one system in front of the car at the left and one system in front of the car at the right. The car 10 is driving in a lane 11 on a motorway 12. The laser device 2 is in the first state, corresponding to the situation as shown in Figure Ia. The optical element 9a of the first light output module 6a has been formed in such a way that an elongated beam shape 8a is realized substantially parallel to the driving direction D of the car 10. The elongated beam shape 13a has been optimized for typical motorway situations.
Figure 2b is a schematic top view of the same car 10, but on a lane 11 in a cross-country environment 13. The laser device 2 has been switched to the second state, corresponding to the situation as shown in Figure Ib. Here, the optical element 9b of the second output module 6b has such a geometry that a broader beam shape 8b is produced, optimized for cross-country situations. Similarly, Figure 2c shows the car in a city 14, in which the laser device 2 has been switched to the third state, corresponding to the situation as shown in Figure Ic. Here, the beam shape 8c is even broader and illuminates a broader field of interest for the driver. In the above example, the front of the car 10 is provided with two vehicle light systems according to the invention. Alternatively, more than two vehicle light systems, e.g. three, four or more vehicle light systems according to the invention can be assembled to the vehicle, e.g. in order to obtain an enhanced light intensity and/or a more complicated beam shape on the road.
Alternatively or additionally, the direction of the produced light output beam can be changed, as the optical element of the corresponding light output module can be formed to produce the output beam in a desired direction. Figures 3a, 3b and 3c are schematic views of a second embodiment of a vehicle light system 1 according to the invention in a first, a second and a third state, respectively. In the first state, the light output beam is directed in line with the generated laser light beam. In the second state, the light output beam is directed to the right, when viewed in the direction of propagation L, while in the third state, the light output beam is directed to the left, also when viewed in the direction of propagation L. As a result, the output light can be advantageously directed into a driving direction when the vehicle is making a turn. Again, multiple laser devices and/or multiple light output modules can be used. The light output modules can e.g. be arranged in a one-dimensional or two-dimensional array. Figure 4 shows diagrammatically an illumination system 20 for a vehicle. The illumination system 20 comprises a control system 21 connected to a plurality of vehicle light systems Ia, Ib as described above, viz. two vehicle light systems Ia, Ib in the embodiment shown. These systems are arranged on a front side of a vehicle 10 but are not limited to this side. Furthermore, the illumination system 20 comprises one or a plurality of sensors 22a, 22b. The sensors 22 are arranged to measure one or more conditions, such as weather parameters, lighting conditions, vehicle orientation parameters, global position parameters (e.g. using GPS), driving conditions such as speed, steering wheel angles, traffic environment, such as oncoming vehicles, etc. The control system 21 is arranged to apply control signals to the vehicle light systems Ia, Ib for controlling the light output of the vehicle light systems Ia, Ib, e.g. by switching the light systems on/off and/or by controlling the optical switch 5 to modify a beam shape 8, depending on one or more parameters measured by the sensors 22. As a result, an adaptive light system is obtained. Obviously, the illumination system 20 may also comprise a different number of vehicle light systems Ia, Ib, e.g. one or more than two, e.g. four vehicle light systems.
The invention is not limited to the embodiments described herein. It will be understood that many variants are possible.
Instead of or in addition to assembling the vehicle light system in front of a vehicle, the light system can also be assembled to the rear of a vehicle. Whilst specific embodiments of the invention have been described hereinbefore, it will be appreciated that the invention may be practiced in ways other than those described. The description is not intended to limit the invention. Any reference signs in the claims shall not be construed as limiting the scope.

Claims

CLAIMS:
1. A vehicle light system comprising a laser device for generating a laser beam, further comprising a light output module provided with a phosphor element for emitting a light beam upon incidence of the generated laser beam and provided with an optical element associated with the phosphor element for producing a light output beam, wherein the light system further comprises a further light output module provided with a corresponding further phosphor element and a further optical element, and wherein the laser device is arranged to switch between a first state, in which the generated laser beam is directed to the phosphor element, and a second state in which the generated laser beam is directed to the further phosphor element.
2. A vehicle light system according to claim 1, wherein the laser device comprises an optical switch for changing the direction and/or position of the laser beam.
3. A vehicle light system according to claim 1, comprising a plurality of light output modules provided with a phosphor element for emitting a light beam upon incidence of the generated laser beam and provided with an optical element associated with the phosphor element for producing a light output beam, wherein the laser device is arranged to switch the direction and/or position of the generated laser beam towards a phosphor element of a selected light output module.
4. A vehicle light system according to claim 1, comprising a single laser device.
5. A vehicle light system according to claim 1, wherein the phosphor element of an output module is arranged to emit a yellow-orange broadband light beam upon incidence of a blue light laser beam leading to white light.
6. A vehicle light system according to claim 1, wherein the phosphor element of an output module is arranged to emit red, green and blue light upon incidence of a blue, violet or UV laser beam.
7. A vehicle light system according to claim 1, wherein the output beam shape of the optical element provided with a first light output module differs from the output beam shape of the optical element provided with a second light output module.
8. A vehicle light system according to claim 1, wherein the output beam direction of the optical element provided with a first light output module differs from the output beam direction of the optical element provided with a second light output module.
9. A vehicle light system according to claim 1, further comprising an automotive control system.
10. A vehicle provided with at least one vehicle light system according to any one of claims 1 to 9.
11. An illumination system for a vehicle, comprising a control system, a vehicle light system and a sensor connected to the control system, wherein the control system is arranged to generate a vehicle light system control signal in dependence upon a parameter measured by the sensor.
12. A method of controlling a vehicle light system, the method comprising the steps of: switching a laser device between a first state, in which a laser beam generated by the laser device is directed to a phosphor element provided in a first light output module, and a second state, in which the generated laser beam is directed to the phosphor element provided in a second light output module, the phosphor elements being arranged to emit a light beam upon incidence of the generated laser beam, and the light output modules being further provided with an optical element for producing a light output beam.
PCT/IB2009/053607 2008-08-22 2009-08-17 Compact multiple beam type vehicle light system WO2010020930A1 (en)

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EP09786949A EP2318752B1 (en) 2008-08-22 2009-08-17 Compact multiple beam type vehicle light system
CN2009801325506A CN102132085B (en) 2008-08-22 2009-08-17 Compact multiple beam type vehicle light system
US13/059,300 US8256941B2 (en) 2008-08-22 2009-08-17 Compact multiple beam type vehicle light system
AT09786949T ATE545827T1 (en) 2008-08-22 2009-08-17 COMPACT VEHICLE LIGHTING SYSTEM WITH MULTIPLE BEAMS
JP2011523472A JP5529132B2 (en) 2008-08-22 2009-08-17 Compact multi-beam vehicle lighting system
KR1020117006411A KR101660969B1 (en) 2008-08-22 2009-08-17 Compact multiple beam type vehicle light system

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JP (1) JP5529132B2 (en)
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011222260A (en) * 2010-04-08 2011-11-04 Sharp Corp Light emitting device, lighting system, headlamp for vehicle, and projector
DE102010028949A1 (en) * 2010-05-12 2011-11-17 Osram Gesellschaft mit beschränkter Haftung headlight module
JP2012009355A (en) * 2010-06-25 2012-01-12 Sharp Corp Light-emitting device, lighting device, and vehicular headlight
JP2012104306A (en) * 2010-11-09 2012-05-31 Stanley Electric Co Ltd Vehicle headlight
DE102010062463A1 (en) * 2010-12-06 2012-06-06 Osram Ag Lighting-device i.e. vehicle headlight, has phosphor regions individually illuminatable by respective light sources, and aligned for diffuse radiation of light on downstream optical elements, which exhibit different optical properties
WO2012128384A1 (en) * 2011-03-24 2012-09-27 シャープ株式会社 Light-emitting device, illumination device, and headlight
JP2012221633A (en) * 2011-04-05 2012-11-12 Sharp Corp Lighting device and headlamp
DE102011085378A1 (en) * 2011-10-28 2013-05-02 Bayerische Motoren Werke Aktiengesellschaft Lighting device for a motor vehicle
DE102012107770A1 (en) * 2012-08-23 2014-05-15 Hella Kgaa Hueck & Co. Light module for a lighting device for uses as brake light, tail light, fog light, hazard light, position light or daytime driving light in vehicle, has diffractive element arranged in beam path between light source and two optical elements
WO2019086176A1 (en) * 2017-11-02 2019-05-09 Bayerische Motoren Werke Aktiengesellschaft Lighting device for a motor vehicle
US11060681B2 (en) 2017-11-02 2021-07-13 Bayerische Motoren Werke Aktiengesellschaft Lighting apparatus for a motor vehicle

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010047376A1 (en) * 2010-10-05 2012-04-05 Gm Global Technology Operations Llc (N.D.Ges.D. Staates Delaware) Automotive headlamp
US8820963B2 (en) * 2011-06-14 2014-09-02 Osram Sylvania Inc. Solid state light fixture with a tunable angular distribution
DE102012100139B4 (en) 2012-01-10 2022-10-13 HELLA GmbH & Co. KGaA Light module for a headlight of a vehicle with a laser beam source
DE102012100140A1 (en) 2012-01-10 2013-07-11 Hella Kgaa Hueck & Co. Light module, particularly for headlight of vehicle, has laser beam source and two converter elements, which are irradiated with laser beam by laser beam source, where light is emitted with light spectrum through converter element
DE102012100141A1 (en) 2012-01-10 2013-07-11 Hella Kgaa Hueck & Co. Light module for headlight of vehicle, has deflection element that is arranged in optical path formed between beam source and converter element, so that deflection element is spatially arranged between converter and beam-forming elements
US20130190971A1 (en) * 2012-01-19 2013-07-25 Noel Wayne Anderson Multifunction light transceiver device
DE102012203929B3 (en) * 2012-03-13 2013-09-19 Automotive Lighting Reutlingen Gmbh Light module of a lighting device of a motor vehicle
JP6022176B2 (en) * 2012-03-22 2016-11-09 シャープ株式会社 Light emitting device, lighting device, and vehicle headlamp
CN102661563A (en) * 2012-04-28 2012-09-12 重庆大学 Spectrum-adjustable automotive laser headlamp system
GB2504334A (en) * 2012-07-26 2014-01-29 Sharp Kk Headlight system with adaptive beams
JP2014041440A (en) * 2012-08-21 2014-03-06 Sony Corp Electronic device, illuminating device, illuminating method, and method of manufacturing illuminating device
DE102012223610B4 (en) 2012-12-18 2023-06-29 Bayerische Motoren Werke Aktiengesellschaft Lighting device for a motor vehicle and motor vehicle with a lighting device
BR112015027791A2 (en) * 2013-05-07 2017-07-25 Koninklijke Philips Nv highway lighting luminaire, highway lighting luminaire system and measuring element
JP6203541B2 (en) * 2013-05-31 2017-09-27 株式会社小糸製作所 Rear fog lamp device
DE102014204613B4 (en) 2014-03-12 2015-12-31 Automotive Lighting Reutlingen Gmbh Lighting device for a motor vehicle
DE102014107345A1 (en) * 2014-05-26 2015-11-26 Hella Kgaa Hueck & Co. Lighting device for vehicles
DE102014213368A1 (en) 2014-07-09 2016-01-14 Automotive Lighting Reutlingen Gmbh Light module for lighting device
JP2016085795A (en) * 2014-10-23 2016-05-19 スタンレー電気株式会社 Vehicular lighting fixture unit
CN107002967B (en) 2014-12-02 2019-11-19 亮锐控股有限公司 Lighting system and method based on laser
JP6614474B2 (en) * 2015-04-21 2019-12-04 ウシオ電機株式会社 Automotive headlamp
US10448476B2 (en) * 2016-05-20 2019-10-15 JST Performance, LLC Method and apparatus for a signal indicator light
JP6402752B2 (en) * 2016-08-04 2018-10-10 トヨタ自動車株式会社 Vehicle lighting device
CN109268774A (en) * 2018-10-25 2019-01-25 华域视觉科技(上海)有限公司 A kind of double matrix form illumination module and its auxiliary lighting method
US11402080B2 (en) * 2019-05-23 2022-08-02 Korrus, Inc. Dynamic illumination using a coherent light source

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050041433A1 (en) * 2003-08-18 2005-02-24 Visteon Global Technologies, Inc. Automotive lighting system
US6883947B1 (en) * 2003-04-07 2005-04-26 Maribel Sarabia Automotive laser illumination module and system
US20080013329A1 (en) * 2006-06-28 2008-01-17 Koito Manufacturing Co., Ltd. Lamp for vehicle
EP2063170A2 (en) * 2007-11-21 2009-05-27 Audi AG Illumination device for a vehicle

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4670637A (en) * 1985-02-11 1987-06-02 The United States Of America As Represented By The Secretary Of The Army Method and apparatus for transmitting a laser signal through fog
US6540154B1 (en) * 1991-04-24 2003-04-01 Aerogen, Inc. Systems and methods for controlling fluid feed to an aerosol generator
JPH10208505A (en) * 1997-01-24 1998-08-07 Koito Mfg Co Ltd Headlight for vehicle
JP3708730B2 (en) * 1998-12-01 2005-10-19 三菱電線工業株式会社 Light emitting device
DE10129743C2 (en) 2001-06-20 2003-05-08 Daimler Chrysler Ag Vehicle headlight, with a number of electronic lighting elements as the light source
US20050004133A1 (en) 2003-06-05 2005-01-06 Makings Lewis R. Modulators of VR1 receptor
CN2685709Y (en) * 2004-02-16 2005-03-16 马俊杰 Antifog laser lamp for vehicle
US7758224B2 (en) * 2004-10-01 2010-07-20 Nichia Corporation Light emitting device
JP4771055B2 (en) * 2005-06-16 2011-09-14 スタンレー電気株式会社 Vehicle lamp and its LED light source
JP2007059260A (en) * 2005-08-25 2007-03-08 Toshiba Lighting & Technology Corp Illumination device and illumination fixture
US7966753B2 (en) * 2006-01-09 2011-06-28 Laserline Mfg., Inc. Snowplow laser guidance system
JP2007323858A (en) * 2006-05-30 2007-12-13 Koito Mfg Co Ltd Variable light distribution vehicular lamp
KR101383662B1 (en) 2006-09-21 2014-04-09 코닌클리케 필립스 엔.브이. A vehicle lamp, a method of adjusting a vehicle lamp, and a vehicle with a vehicle lamp
CN101158456A (en) * 2007-02-05 2008-04-09 姜宝明 Car lamp ultra-intelligent illuminating system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6883947B1 (en) * 2003-04-07 2005-04-26 Maribel Sarabia Automotive laser illumination module and system
US20050041433A1 (en) * 2003-08-18 2005-02-24 Visteon Global Technologies, Inc. Automotive lighting system
US20080013329A1 (en) * 2006-06-28 2008-01-17 Koito Manufacturing Co., Ltd. Lamp for vehicle
EP2063170A2 (en) * 2007-11-21 2009-05-27 Audi AG Illumination device for a vehicle

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011222260A (en) * 2010-04-08 2011-11-04 Sharp Corp Light emitting device, lighting system, headlamp for vehicle, and projector
CN104848134A (en) * 2010-05-12 2015-08-19 欧司朗有限公司 Headlight module
DE102010028949A1 (en) * 2010-05-12 2011-11-17 Osram Gesellschaft mit beschränkter Haftung headlight module
US9702519B2 (en) 2010-05-12 2017-07-11 Osram Gmbh Headlight module
JP2015043346A (en) * 2010-05-12 2015-03-05 オスラム ゲーエムベーハーＯＳＲＡＭ ＧｍｂＨ Headlight module
EP2851611A3 (en) * 2010-05-12 2015-04-08 OSRAM GmbH Headlight module
JP2012009355A (en) * 2010-06-25 2012-01-12 Sharp Corp Light-emitting device, lighting device, and vehicular headlight
JP2012104306A (en) * 2010-11-09 2012-05-31 Stanley Electric Co Ltd Vehicle headlight
DE102010062463A1 (en) * 2010-12-06 2012-06-06 Osram Ag Lighting-device i.e. vehicle headlight, has phosphor regions individually illuminatable by respective light sources, and aligned for diffuse radiation of light on downstream optical elements, which exhibit different optical properties
WO2012128384A1 (en) * 2011-03-24 2012-09-27 シャープ株式会社 Light-emitting device, illumination device, and headlight
JP2012221633A (en) * 2011-04-05 2012-11-12 Sharp Corp Lighting device and headlamp
US9562660B2 (en) 2011-10-28 2017-02-07 Bayerische Motoren Werke Aktiengesellschaft Lighting device for a motor vehicle
DE102011085378A1 (en) * 2011-10-28 2013-05-02 Bayerische Motoren Werke Aktiengesellschaft Lighting device for a motor vehicle
DE102012107770A1 (en) * 2012-08-23 2014-05-15 Hella Kgaa Hueck & Co. Light module for a lighting device for uses as brake light, tail light, fog light, hazard light, position light or daytime driving light in vehicle, has diffractive element arranged in beam path between light source and two optical elements
WO2019086176A1 (en) * 2017-11-02 2019-05-09 Bayerische Motoren Werke Aktiengesellschaft Lighting device for a motor vehicle
US10967779B2 (en) 2017-11-02 2021-04-06 Bayerische Motoren Werke Aktiengesellschaft Lighting apparatus for a motor vehicle
US11060681B2 (en) 2017-11-02 2021-07-13 Bayerische Motoren Werke Aktiengesellschaft Lighting apparatus for a motor vehicle

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ATE545827T1 (en) 2012-03-15
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US8256941B2 (en) 2012-09-04
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JP5529132B2 (en) 2014-06-25
KR20110053246A (en) 2011-05-19

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